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 (tb_sa[MACSEC_SA_ATTR_PN] &&
1757 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1758 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1759 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1765 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1770 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1771 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1772 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1773 MACSEC_SA_ATTR_SALT);
1779 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1785 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1791 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1792 secy->key_len, secy->icv_len);
1799 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1800 spin_lock_bh(&rx_sa->lock);
1801 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1802 spin_unlock_bh(&rx_sa->lock);
1805 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1806 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1810 /* If h/w offloading is available, propagate to the device */
1811 if (macsec_is_offloaded(netdev_priv(dev))) {
1812 const struct macsec_ops *ops;
1813 struct macsec_context ctx;
1815 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1821 ctx.sa.assoc_num = assoc_num;
1822 ctx.sa.rx_sa = rx_sa;
1824 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1827 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1833 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1834 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1838 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1839 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1851 static bool validate_add_rxsc(struct nlattr **attrs)
1853 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1856 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1857 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1864 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1866 struct net_device *dev;
1867 sci_t sci = MACSEC_UNDEF_SCI;
1868 struct nlattr **attrs = info->attrs;
1869 struct macsec_rx_sc *rx_sc;
1870 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1871 struct macsec_secy *secy;
1875 if (!attrs[MACSEC_ATTR_IFINDEX])
1878 if (parse_rxsc_config(attrs, tb_rxsc))
1881 if (!validate_add_rxsc(tb_rxsc))
1885 dev = get_dev_from_nl(genl_info_net(info), attrs);
1888 return PTR_ERR(dev);
1891 secy = &macsec_priv(dev)->secy;
1892 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1894 rx_sc = create_rx_sc(dev, sci);
1895 if (IS_ERR(rx_sc)) {
1897 return PTR_ERR(rx_sc);
1900 was_active = rx_sc->active;
1901 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1902 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1904 if (macsec_is_offloaded(netdev_priv(dev))) {
1905 const struct macsec_ops *ops;
1906 struct macsec_context ctx;
1908 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1917 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1927 rx_sc->active = was_active;
1932 static bool validate_add_txsa(struct nlattr **attrs)
1934 if (!attrs[MACSEC_SA_ATTR_AN] ||
1935 !attrs[MACSEC_SA_ATTR_PN] ||
1936 !attrs[MACSEC_SA_ATTR_KEY] ||
1937 !attrs[MACSEC_SA_ATTR_KEYID])
1940 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1943 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1946 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1947 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1951 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1957 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1959 struct net_device *dev;
1960 struct nlattr **attrs = info->attrs;
1961 struct macsec_secy *secy;
1962 struct macsec_tx_sc *tx_sc;
1963 struct macsec_tx_sa *tx_sa;
1964 unsigned char assoc_num;
1966 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1967 bool was_operational;
1970 if (!attrs[MACSEC_ATTR_IFINDEX])
1973 if (parse_sa_config(attrs, tb_sa))
1976 if (!validate_add_txsa(tb_sa))
1980 dev = get_dev_from_nl(genl_info_net(info), attrs);
1983 return PTR_ERR(dev);
1986 secy = &macsec_priv(dev)->secy;
1987 tx_sc = &secy->tx_sc;
1989 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1991 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1992 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1993 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1998 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1999 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2000 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2001 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2007 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2012 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2013 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2014 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2015 MACSEC_SA_ATTR_SALT);
2021 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2027 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2033 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2034 secy->key_len, secy->icv_len);
2041 spin_lock_bh(&tx_sa->lock);
2042 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2043 spin_unlock_bh(&tx_sa->lock);
2045 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2046 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2048 was_operational = secy->operational;
2049 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2050 secy->operational = true;
2052 /* If h/w offloading is available, propagate to the device */
2053 if (macsec_is_offloaded(netdev_priv(dev))) {
2054 const struct macsec_ops *ops;
2055 struct macsec_context ctx;
2057 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2063 ctx.sa.assoc_num = assoc_num;
2064 ctx.sa.tx_sa = tx_sa;
2066 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2069 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2075 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2076 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2080 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2081 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2088 secy->operational = was_operational;
2094 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2096 struct nlattr **attrs = info->attrs;
2097 struct net_device *dev;
2098 struct macsec_secy *secy;
2099 struct macsec_rx_sc *rx_sc;
2100 struct macsec_rx_sa *rx_sa;
2102 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2103 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2106 if (!attrs[MACSEC_ATTR_IFINDEX])
2109 if (parse_sa_config(attrs, tb_sa))
2112 if (parse_rxsc_config(attrs, tb_rxsc))
2116 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2117 &dev, &secy, &rx_sc, &assoc_num);
2118 if (IS_ERR(rx_sa)) {
2120 return PTR_ERR(rx_sa);
2123 if (rx_sa->active) {
2128 /* If h/w offloading is available, propagate to the device */
2129 if (macsec_is_offloaded(netdev_priv(dev))) {
2130 const struct macsec_ops *ops;
2131 struct macsec_context ctx;
2133 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2139 ctx.sa.assoc_num = assoc_num;
2140 ctx.sa.rx_sa = rx_sa;
2143 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2148 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2160 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2162 struct nlattr **attrs = info->attrs;
2163 struct net_device *dev;
2164 struct macsec_secy *secy;
2165 struct macsec_rx_sc *rx_sc;
2167 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2170 if (!attrs[MACSEC_ATTR_IFINDEX])
2173 if (parse_rxsc_config(attrs, tb_rxsc))
2176 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2180 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2183 return PTR_ERR(dev);
2186 secy = &macsec_priv(dev)->secy;
2187 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2189 rx_sc = del_rx_sc(secy, sci);
2195 /* If h/w offloading is available, propagate to the device */
2196 if (macsec_is_offloaded(netdev_priv(dev))) {
2197 const struct macsec_ops *ops;
2198 struct macsec_context ctx;
2200 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2208 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2223 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2225 struct nlattr **attrs = info->attrs;
2226 struct net_device *dev;
2227 struct macsec_secy *secy;
2228 struct macsec_tx_sc *tx_sc;
2229 struct macsec_tx_sa *tx_sa;
2231 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2234 if (!attrs[MACSEC_ATTR_IFINDEX])
2237 if (parse_sa_config(attrs, tb_sa))
2241 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2242 &dev, &secy, &tx_sc, &assoc_num);
2243 if (IS_ERR(tx_sa)) {
2245 return PTR_ERR(tx_sa);
2248 if (tx_sa->active) {
2253 /* If h/w offloading is available, propagate to the device */
2254 if (macsec_is_offloaded(netdev_priv(dev))) {
2255 const struct macsec_ops *ops;
2256 struct macsec_context ctx;
2258 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2264 ctx.sa.assoc_num = assoc_num;
2265 ctx.sa.tx_sa = tx_sa;
2268 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2273 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2285 static bool validate_upd_sa(struct nlattr **attrs)
2287 if (!attrs[MACSEC_SA_ATTR_AN] ||
2288 attrs[MACSEC_SA_ATTR_KEY] ||
2289 attrs[MACSEC_SA_ATTR_KEYID] ||
2290 attrs[MACSEC_SA_ATTR_SSCI] ||
2291 attrs[MACSEC_SA_ATTR_SALT])
2294 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2297 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2300 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2301 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2308 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2310 struct nlattr **attrs = info->attrs;
2311 struct net_device *dev;
2312 struct macsec_secy *secy;
2313 struct macsec_tx_sc *tx_sc;
2314 struct macsec_tx_sa *tx_sa;
2316 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2317 bool was_operational, was_active;
2323 if (!attrs[MACSEC_ATTR_IFINDEX])
2326 if (parse_sa_config(attrs, tb_sa))
2329 if (!validate_upd_sa(tb_sa))
2333 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2334 &dev, &secy, &tx_sc, &assoc_num);
2335 if (IS_ERR(tx_sa)) {
2337 return PTR_ERR(tx_sa);
2340 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2343 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2344 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2345 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2346 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2351 spin_lock_bh(&tx_sa->lock);
2352 prev_pn = tx_sa->next_pn_halves;
2353 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2354 spin_unlock_bh(&tx_sa->lock);
2357 was_active = tx_sa->active;
2358 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2359 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2361 was_operational = secy->operational;
2362 if (assoc_num == tx_sc->encoding_sa)
2363 secy->operational = tx_sa->active;
2365 /* If h/w offloading is available, propagate to the device */
2366 if (macsec_is_offloaded(netdev_priv(dev))) {
2367 const struct macsec_ops *ops;
2368 struct macsec_context ctx;
2370 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2376 ctx.sa.assoc_num = assoc_num;
2377 ctx.sa.tx_sa = tx_sa;
2380 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2390 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2391 spin_lock_bh(&tx_sa->lock);
2392 tx_sa->next_pn_halves = prev_pn;
2393 spin_unlock_bh(&tx_sa->lock);
2395 tx_sa->active = was_active;
2396 secy->operational = was_operational;
2401 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2403 struct nlattr **attrs = info->attrs;
2404 struct net_device *dev;
2405 struct macsec_secy *secy;
2406 struct macsec_rx_sc *rx_sc;
2407 struct macsec_rx_sa *rx_sa;
2409 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2410 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2417 if (!attrs[MACSEC_ATTR_IFINDEX])
2420 if (parse_rxsc_config(attrs, tb_rxsc))
2423 if (parse_sa_config(attrs, tb_sa))
2426 if (!validate_upd_sa(tb_sa))
2430 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2431 &dev, &secy, &rx_sc, &assoc_num);
2432 if (IS_ERR(rx_sa)) {
2434 return PTR_ERR(rx_sa);
2437 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2440 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2441 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2442 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2443 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2448 spin_lock_bh(&rx_sa->lock);
2449 prev_pn = rx_sa->next_pn_halves;
2450 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2451 spin_unlock_bh(&rx_sa->lock);
2454 was_active = rx_sa->active;
2455 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2456 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2458 /* If h/w offloading is available, propagate to the device */
2459 if (macsec_is_offloaded(netdev_priv(dev))) {
2460 const struct macsec_ops *ops;
2461 struct macsec_context ctx;
2463 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2469 ctx.sa.assoc_num = assoc_num;
2470 ctx.sa.rx_sa = rx_sa;
2473 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2482 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2483 spin_lock_bh(&rx_sa->lock);
2484 rx_sa->next_pn_halves = prev_pn;
2485 spin_unlock_bh(&rx_sa->lock);
2487 rx_sa->active = was_active;
2492 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2494 struct nlattr **attrs = info->attrs;
2495 struct net_device *dev;
2496 struct macsec_secy *secy;
2497 struct macsec_rx_sc *rx_sc;
2498 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2499 unsigned int prev_n_rx_sc;
2503 if (!attrs[MACSEC_ATTR_IFINDEX])
2506 if (parse_rxsc_config(attrs, tb_rxsc))
2509 if (!validate_add_rxsc(tb_rxsc))
2513 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2514 if (IS_ERR(rx_sc)) {
2516 return PTR_ERR(rx_sc);
2519 was_active = rx_sc->active;
2520 prev_n_rx_sc = secy->n_rx_sc;
2521 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2522 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2524 if (rx_sc->active != new)
2525 secy->n_rx_sc += new ? 1 : -1;
2527 rx_sc->active = new;
2530 /* If h/w offloading is available, propagate to the device */
2531 if (macsec_is_offloaded(netdev_priv(dev))) {
2532 const struct macsec_ops *ops;
2533 struct macsec_context ctx;
2535 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2544 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2554 secy->n_rx_sc = prev_n_rx_sc;
2555 rx_sc->active = was_active;
2560 static bool macsec_is_configured(struct macsec_dev *macsec)
2562 struct macsec_secy *secy = &macsec->secy;
2563 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2566 if (secy->n_rx_sc > 0)
2569 for (i = 0; i < MACSEC_NUM_AN; i++)
2576 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2578 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2579 enum macsec_offload offload, prev_offload;
2580 int (*func)(struct macsec_context *ctx);
2581 struct nlattr **attrs = info->attrs;
2582 struct net_device *dev;
2583 const struct macsec_ops *ops;
2584 struct macsec_context ctx;
2585 struct macsec_dev *macsec;
2588 if (!attrs[MACSEC_ATTR_IFINDEX])
2591 if (!attrs[MACSEC_ATTR_OFFLOAD])
2594 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2595 attrs[MACSEC_ATTR_OFFLOAD],
2596 macsec_genl_offload_policy, NULL))
2599 dev = get_dev_from_nl(genl_info_net(info), attrs);
2601 return PTR_ERR(dev);
2602 macsec = macsec_priv(dev);
2604 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2607 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2608 if (macsec->offload == offload)
2611 /* Check if the offloading mode is supported by the underlying layers */
2612 if (offload != MACSEC_OFFLOAD_OFF &&
2613 !macsec_check_offload(offload, macsec))
2616 /* Check if the net device is busy. */
2617 if (netif_running(dev))
2622 prev_offload = macsec->offload;
2623 macsec->offload = offload;
2625 /* Check if the device already has rules configured: we do not support
2628 if (macsec_is_configured(macsec)) {
2633 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2640 if (prev_offload == MACSEC_OFFLOAD_OFF)
2641 func = ops->mdo_add_secy;
2643 func = ops->mdo_del_secy;
2645 ctx.secy = &macsec->secy;
2646 ret = macsec_offload(func, &ctx);
2650 /* Force features update, since they are different for SW MACSec and
2651 * HW offloading cases.
2653 netdev_update_features(dev);
2659 macsec->offload = prev_offload;
2665 static void get_tx_sa_stats(struct net_device *dev, int an,
2666 struct macsec_tx_sa *tx_sa,
2667 struct macsec_tx_sa_stats *sum)
2669 struct macsec_dev *macsec = macsec_priv(dev);
2672 /* If h/w offloading is available, propagate to the device */
2673 if (macsec_is_offloaded(macsec)) {
2674 const struct macsec_ops *ops;
2675 struct macsec_context ctx;
2677 ops = macsec_get_ops(macsec, &ctx);
2679 ctx.sa.assoc_num = an;
2680 ctx.sa.tx_sa = tx_sa;
2681 ctx.stats.tx_sa_stats = sum;
2682 ctx.secy = &macsec_priv(dev)->secy;
2683 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2688 for_each_possible_cpu(cpu) {
2689 const struct macsec_tx_sa_stats *stats =
2690 per_cpu_ptr(tx_sa->stats, cpu);
2692 sum->OutPktsProtected += stats->OutPktsProtected;
2693 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2697 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2699 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2700 sum->OutPktsProtected) ||
2701 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2702 sum->OutPktsEncrypted))
2708 static void get_rx_sa_stats(struct net_device *dev,
2709 struct macsec_rx_sc *rx_sc, int an,
2710 struct macsec_rx_sa *rx_sa,
2711 struct macsec_rx_sa_stats *sum)
2713 struct macsec_dev *macsec = macsec_priv(dev);
2716 /* If h/w offloading is available, propagate to the device */
2717 if (macsec_is_offloaded(macsec)) {
2718 const struct macsec_ops *ops;
2719 struct macsec_context ctx;
2721 ops = macsec_get_ops(macsec, &ctx);
2723 ctx.sa.assoc_num = an;
2724 ctx.sa.rx_sa = rx_sa;
2725 ctx.stats.rx_sa_stats = sum;
2726 ctx.secy = &macsec_priv(dev)->secy;
2728 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2733 for_each_possible_cpu(cpu) {
2734 const struct macsec_rx_sa_stats *stats =
2735 per_cpu_ptr(rx_sa->stats, cpu);
2737 sum->InPktsOK += stats->InPktsOK;
2738 sum->InPktsInvalid += stats->InPktsInvalid;
2739 sum->InPktsNotValid += stats->InPktsNotValid;
2740 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2741 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2745 static int copy_rx_sa_stats(struct sk_buff *skb,
2746 struct macsec_rx_sa_stats *sum)
2748 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2749 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2750 sum->InPktsInvalid) ||
2751 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2752 sum->InPktsNotValid) ||
2753 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2754 sum->InPktsNotUsingSA) ||
2755 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2756 sum->InPktsUnusedSA))
2762 static void get_rx_sc_stats(struct net_device *dev,
2763 struct macsec_rx_sc *rx_sc,
2764 struct macsec_rx_sc_stats *sum)
2766 struct macsec_dev *macsec = macsec_priv(dev);
2769 /* If h/w offloading is available, propagate to the device */
2770 if (macsec_is_offloaded(macsec)) {
2771 const struct macsec_ops *ops;
2772 struct macsec_context ctx;
2774 ops = macsec_get_ops(macsec, &ctx);
2776 ctx.stats.rx_sc_stats = sum;
2777 ctx.secy = &macsec_priv(dev)->secy;
2779 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2784 for_each_possible_cpu(cpu) {
2785 const struct pcpu_rx_sc_stats *stats;
2786 struct macsec_rx_sc_stats tmp;
2789 stats = per_cpu_ptr(rx_sc->stats, cpu);
2791 start = u64_stats_fetch_begin_irq(&stats->syncp);
2792 memcpy(&tmp, &stats->stats, sizeof(tmp));
2793 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2795 sum->InOctetsValidated += tmp.InOctetsValidated;
2796 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2797 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2798 sum->InPktsDelayed += tmp.InPktsDelayed;
2799 sum->InPktsOK += tmp.InPktsOK;
2800 sum->InPktsInvalid += tmp.InPktsInvalid;
2801 sum->InPktsLate += tmp.InPktsLate;
2802 sum->InPktsNotValid += tmp.InPktsNotValid;
2803 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2804 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2808 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2810 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2811 sum->InOctetsValidated,
2812 MACSEC_RXSC_STATS_ATTR_PAD) ||
2813 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2814 sum->InOctetsDecrypted,
2815 MACSEC_RXSC_STATS_ATTR_PAD) ||
2816 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2817 sum->InPktsUnchecked,
2818 MACSEC_RXSC_STATS_ATTR_PAD) ||
2819 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2821 MACSEC_RXSC_STATS_ATTR_PAD) ||
2822 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2824 MACSEC_RXSC_STATS_ATTR_PAD) ||
2825 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2827 MACSEC_RXSC_STATS_ATTR_PAD) ||
2828 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2830 MACSEC_RXSC_STATS_ATTR_PAD) ||
2831 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2832 sum->InPktsNotValid,
2833 MACSEC_RXSC_STATS_ATTR_PAD) ||
2834 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2835 sum->InPktsNotUsingSA,
2836 MACSEC_RXSC_STATS_ATTR_PAD) ||
2837 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2838 sum->InPktsUnusedSA,
2839 MACSEC_RXSC_STATS_ATTR_PAD))
2845 static void get_tx_sc_stats(struct net_device *dev,
2846 struct macsec_tx_sc_stats *sum)
2848 struct macsec_dev *macsec = macsec_priv(dev);
2851 /* If h/w offloading is available, propagate to the device */
2852 if (macsec_is_offloaded(macsec)) {
2853 const struct macsec_ops *ops;
2854 struct macsec_context ctx;
2856 ops = macsec_get_ops(macsec, &ctx);
2858 ctx.stats.tx_sc_stats = sum;
2859 ctx.secy = &macsec_priv(dev)->secy;
2860 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2865 for_each_possible_cpu(cpu) {
2866 const struct pcpu_tx_sc_stats *stats;
2867 struct macsec_tx_sc_stats tmp;
2870 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2872 start = u64_stats_fetch_begin_irq(&stats->syncp);
2873 memcpy(&tmp, &stats->stats, sizeof(tmp));
2874 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2876 sum->OutPktsProtected += tmp.OutPktsProtected;
2877 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2878 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2879 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2883 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2885 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2886 sum->OutPktsProtected,
2887 MACSEC_TXSC_STATS_ATTR_PAD) ||
2888 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2889 sum->OutPktsEncrypted,
2890 MACSEC_TXSC_STATS_ATTR_PAD) ||
2891 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2892 sum->OutOctetsProtected,
2893 MACSEC_TXSC_STATS_ATTR_PAD) ||
2894 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2895 sum->OutOctetsEncrypted,
2896 MACSEC_TXSC_STATS_ATTR_PAD))
2902 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2904 struct macsec_dev *macsec = macsec_priv(dev);
2907 /* If h/w offloading is available, propagate to the device */
2908 if (macsec_is_offloaded(macsec)) {
2909 const struct macsec_ops *ops;
2910 struct macsec_context ctx;
2912 ops = macsec_get_ops(macsec, &ctx);
2914 ctx.stats.dev_stats = sum;
2915 ctx.secy = &macsec_priv(dev)->secy;
2916 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2921 for_each_possible_cpu(cpu) {
2922 const struct pcpu_secy_stats *stats;
2923 struct macsec_dev_stats tmp;
2926 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2928 start = u64_stats_fetch_begin_irq(&stats->syncp);
2929 memcpy(&tmp, &stats->stats, sizeof(tmp));
2930 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2932 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2933 sum->InPktsUntagged += tmp.InPktsUntagged;
2934 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2935 sum->InPktsNoTag += tmp.InPktsNoTag;
2936 sum->InPktsBadTag += tmp.InPktsBadTag;
2937 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2938 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2939 sum->InPktsOverrun += tmp.InPktsOverrun;
2943 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2945 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2946 sum->OutPktsUntagged,
2947 MACSEC_SECY_STATS_ATTR_PAD) ||
2948 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2949 sum->InPktsUntagged,
2950 MACSEC_SECY_STATS_ATTR_PAD) ||
2951 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2952 sum->OutPktsTooLong,
2953 MACSEC_SECY_STATS_ATTR_PAD) ||
2954 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2956 MACSEC_SECY_STATS_ATTR_PAD) ||
2957 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2959 MACSEC_SECY_STATS_ATTR_PAD) ||
2960 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2961 sum->InPktsUnknownSCI,
2962 MACSEC_SECY_STATS_ATTR_PAD) ||
2963 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2965 MACSEC_SECY_STATS_ATTR_PAD) ||
2966 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2968 MACSEC_SECY_STATS_ATTR_PAD))
2974 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2976 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2977 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2984 switch (secy->key_len) {
2985 case MACSEC_GCM_AES_128_SAK_LEN:
2986 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2988 case MACSEC_GCM_AES_256_SAK_LEN:
2989 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
2995 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2996 MACSEC_SECY_ATTR_PAD) ||
2997 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2998 csid, MACSEC_SECY_ATTR_PAD) ||
2999 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3000 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3001 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3002 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3003 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3007 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3008 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3011 if (secy->replay_protect) {
3012 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3016 nla_nest_end(skb, secy_nest);
3020 nla_nest_cancel(skb, secy_nest);
3024 static noinline_for_stack int
3025 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3026 struct sk_buff *skb, struct netlink_callback *cb)
3028 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3029 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3030 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3031 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3032 struct macsec_dev *macsec = netdev_priv(dev);
3033 struct macsec_dev_stats dev_stats = {0, };
3034 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3035 struct nlattr *txsa_list, *rxsc_list;
3036 struct macsec_rx_sc *rx_sc;
3037 struct nlattr *attr;
3041 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3042 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3046 genl_dump_check_consistent(cb, hdr);
3048 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3049 goto nla_put_failure;
3051 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3053 goto nla_put_failure;
3054 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3055 goto nla_put_failure;
3056 nla_nest_end(skb, attr);
3058 if (nla_put_secy(secy, skb))
3059 goto nla_put_failure;
3061 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3063 goto nla_put_failure;
3065 get_tx_sc_stats(dev, &tx_sc_stats);
3066 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3067 nla_nest_cancel(skb, attr);
3068 goto nla_put_failure;
3070 nla_nest_end(skb, attr);
3072 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3074 goto nla_put_failure;
3075 get_secy_stats(dev, &dev_stats);
3076 if (copy_secy_stats(skb, &dev_stats)) {
3077 nla_nest_cancel(skb, attr);
3078 goto nla_put_failure;
3080 nla_nest_end(skb, attr);
3082 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3084 goto nla_put_failure;
3085 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3086 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3087 struct nlattr *txsa_nest;
3094 txsa_nest = nla_nest_start_noflag(skb, j++);
3096 nla_nest_cancel(skb, txsa_list);
3097 goto nla_put_failure;
3100 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3102 nla_nest_cancel(skb, txsa_nest);
3103 nla_nest_cancel(skb, txsa_list);
3104 goto nla_put_failure;
3106 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3107 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3108 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3109 nla_nest_cancel(skb, attr);
3110 nla_nest_cancel(skb, txsa_nest);
3111 nla_nest_cancel(skb, txsa_list);
3112 goto nla_put_failure;
3114 nla_nest_end(skb, attr);
3117 pn = tx_sa->next_pn;
3118 pn_len = MACSEC_XPN_PN_LEN;
3120 pn = tx_sa->next_pn_halves.lower;
3121 pn_len = MACSEC_DEFAULT_PN_LEN;
3124 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3125 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3126 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3127 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3128 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3129 nla_nest_cancel(skb, txsa_nest);
3130 nla_nest_cancel(skb, txsa_list);
3131 goto nla_put_failure;
3134 nla_nest_end(skb, txsa_nest);
3136 nla_nest_end(skb, txsa_list);
3138 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3140 goto nla_put_failure;
3143 for_each_rxsc_rtnl(secy, rx_sc) {
3145 struct nlattr *rxsa_list;
3146 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3149 nla_nest_cancel(skb, rxsc_list);
3150 goto nla_put_failure;
3153 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3154 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3155 MACSEC_RXSC_ATTR_PAD)) {
3156 nla_nest_cancel(skb, rxsc_nest);
3157 nla_nest_cancel(skb, rxsc_list);
3158 goto nla_put_failure;
3161 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3163 nla_nest_cancel(skb, rxsc_nest);
3164 nla_nest_cancel(skb, rxsc_list);
3165 goto nla_put_failure;
3167 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3168 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3169 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3170 nla_nest_cancel(skb, attr);
3171 nla_nest_cancel(skb, rxsc_nest);
3172 nla_nest_cancel(skb, rxsc_list);
3173 goto nla_put_failure;
3175 nla_nest_end(skb, attr);
3177 rxsa_list = nla_nest_start_noflag(skb,
3178 MACSEC_RXSC_ATTR_SA_LIST);
3180 nla_nest_cancel(skb, rxsc_nest);
3181 nla_nest_cancel(skb, rxsc_list);
3182 goto nla_put_failure;
3185 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3186 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3187 struct nlattr *rxsa_nest;
3194 rxsa_nest = nla_nest_start_noflag(skb, k++);
3196 nla_nest_cancel(skb, rxsa_list);
3197 nla_nest_cancel(skb, rxsc_nest);
3198 nla_nest_cancel(skb, rxsc_list);
3199 goto nla_put_failure;
3202 attr = nla_nest_start_noflag(skb,
3203 MACSEC_SA_ATTR_STATS);
3205 nla_nest_cancel(skb, rxsa_list);
3206 nla_nest_cancel(skb, rxsc_nest);
3207 nla_nest_cancel(skb, rxsc_list);
3208 goto nla_put_failure;
3210 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3211 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3212 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3213 nla_nest_cancel(skb, attr);
3214 nla_nest_cancel(skb, rxsa_list);
3215 nla_nest_cancel(skb, rxsc_nest);
3216 nla_nest_cancel(skb, rxsc_list);
3217 goto nla_put_failure;
3219 nla_nest_end(skb, attr);
3222 pn = rx_sa->next_pn;
3223 pn_len = MACSEC_XPN_PN_LEN;
3225 pn = rx_sa->next_pn_halves.lower;
3226 pn_len = MACSEC_DEFAULT_PN_LEN;
3229 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3230 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3231 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3232 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3233 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3234 nla_nest_cancel(skb, rxsa_nest);
3235 nla_nest_cancel(skb, rxsc_nest);
3236 nla_nest_cancel(skb, rxsc_list);
3237 goto nla_put_failure;
3239 nla_nest_end(skb, rxsa_nest);
3242 nla_nest_end(skb, rxsa_list);
3243 nla_nest_end(skb, rxsc_nest);
3246 nla_nest_end(skb, rxsc_list);
3248 genlmsg_end(skb, hdr);
3253 genlmsg_cancel(skb, hdr);
3257 static int macsec_generation = 1; /* protected by RTNL */
3259 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3261 struct net *net = sock_net(skb->sk);
3262 struct net_device *dev;
3265 dev_idx = cb->args[0];
3270 cb->seq = macsec_generation;
3272 for_each_netdev(net, dev) {
3273 struct macsec_secy *secy;
3278 if (!netif_is_macsec(dev))
3281 secy = &macsec_priv(dev)->secy;
3282 if (dump_secy(secy, dev, skb, cb) < 0)
3294 static const struct genl_small_ops macsec_genl_ops[] = {
3296 .cmd = MACSEC_CMD_GET_TXSC,
3297 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3298 .dumpit = macsec_dump_txsc,
3301 .cmd = MACSEC_CMD_ADD_RXSC,
3302 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3303 .doit = macsec_add_rxsc,
3304 .flags = GENL_ADMIN_PERM,
3307 .cmd = MACSEC_CMD_DEL_RXSC,
3308 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3309 .doit = macsec_del_rxsc,
3310 .flags = GENL_ADMIN_PERM,
3313 .cmd = MACSEC_CMD_UPD_RXSC,
3314 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3315 .doit = macsec_upd_rxsc,
3316 .flags = GENL_ADMIN_PERM,
3319 .cmd = MACSEC_CMD_ADD_TXSA,
3320 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3321 .doit = macsec_add_txsa,
3322 .flags = GENL_ADMIN_PERM,
3325 .cmd = MACSEC_CMD_DEL_TXSA,
3326 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3327 .doit = macsec_del_txsa,
3328 .flags = GENL_ADMIN_PERM,
3331 .cmd = MACSEC_CMD_UPD_TXSA,
3332 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3333 .doit = macsec_upd_txsa,
3334 .flags = GENL_ADMIN_PERM,
3337 .cmd = MACSEC_CMD_ADD_RXSA,
3338 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3339 .doit = macsec_add_rxsa,
3340 .flags = GENL_ADMIN_PERM,
3343 .cmd = MACSEC_CMD_DEL_RXSA,
3344 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3345 .doit = macsec_del_rxsa,
3346 .flags = GENL_ADMIN_PERM,
3349 .cmd = MACSEC_CMD_UPD_RXSA,
3350 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3351 .doit = macsec_upd_rxsa,
3352 .flags = GENL_ADMIN_PERM,
3355 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3356 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3357 .doit = macsec_upd_offload,
3358 .flags = GENL_ADMIN_PERM,
3362 static struct genl_family macsec_fam __ro_after_init = {
3363 .name = MACSEC_GENL_NAME,
3365 .version = MACSEC_GENL_VERSION,
3366 .maxattr = MACSEC_ATTR_MAX,
3367 .policy = macsec_genl_policy,
3369 .module = THIS_MODULE,
3370 .small_ops = macsec_genl_ops,
3371 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3374 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3375 struct net_device *dev)
3377 struct macsec_dev *macsec = netdev_priv(dev);
3378 struct macsec_secy *secy = &macsec->secy;
3379 struct pcpu_secy_stats *secy_stats;
3382 if (macsec_is_offloaded(netdev_priv(dev))) {
3383 skb->dev = macsec->real_dev;
3384 return dev_queue_xmit(skb);
3388 if (!secy->protect_frames) {
3389 secy_stats = this_cpu_ptr(macsec->stats);
3390 u64_stats_update_begin(&secy_stats->syncp);
3391 secy_stats->stats.OutPktsUntagged++;
3392 u64_stats_update_end(&secy_stats->syncp);
3393 skb->dev = macsec->real_dev;
3395 ret = dev_queue_xmit(skb);
3396 count_tx(dev, ret, len);
3400 if (!secy->operational) {
3402 dev->stats.tx_dropped++;
3403 return NETDEV_TX_OK;
3406 skb = macsec_encrypt(skb, dev);
3408 if (PTR_ERR(skb) != -EINPROGRESS)
3409 dev->stats.tx_dropped++;
3410 return NETDEV_TX_OK;
3413 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3415 macsec_encrypt_finish(skb, dev);
3417 ret = dev_queue_xmit(skb);
3418 count_tx(dev, ret, len);
3422 #define SW_MACSEC_FEATURES \
3423 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3425 /* If h/w offloading is enabled, use real device features save for
3426 * VLAN_FEATURES - they require additional ops
3427 * HW_MACSEC - no reason to report it
3429 #define REAL_DEV_FEATURES(dev) \
3430 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3432 static int macsec_dev_init(struct net_device *dev)
3434 struct macsec_dev *macsec = macsec_priv(dev);
3435 struct net_device *real_dev = macsec->real_dev;
3438 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3442 err = gro_cells_init(&macsec->gro_cells, dev);
3444 free_percpu(dev->tstats);
3448 if (macsec_is_offloaded(macsec)) {
3449 dev->features = REAL_DEV_FEATURES(real_dev);
3451 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3452 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3455 dev->needed_headroom = real_dev->needed_headroom +
3456 MACSEC_NEEDED_HEADROOM;
3457 dev->needed_tailroom = real_dev->needed_tailroom +
3458 MACSEC_NEEDED_TAILROOM;
3460 if (is_zero_ether_addr(dev->dev_addr))
3461 eth_hw_addr_inherit(dev, real_dev);
3462 if (is_zero_ether_addr(dev->broadcast))
3463 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3465 /* Get macsec's reference to real_dev */
3466 dev_hold_track(real_dev, &macsec->dev_tracker, GFP_KERNEL);
3471 static void macsec_dev_uninit(struct net_device *dev)
3473 struct macsec_dev *macsec = macsec_priv(dev);
3475 gro_cells_destroy(&macsec->gro_cells);
3476 free_percpu(dev->tstats);
3479 static netdev_features_t macsec_fix_features(struct net_device *dev,
3480 netdev_features_t features)
3482 struct macsec_dev *macsec = macsec_priv(dev);
3483 struct net_device *real_dev = macsec->real_dev;
3485 if (macsec_is_offloaded(macsec))
3486 return REAL_DEV_FEATURES(real_dev);
3488 features &= (real_dev->features & SW_MACSEC_FEATURES) |
3489 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3490 features |= NETIF_F_LLTX;
3495 static int macsec_dev_open(struct net_device *dev)
3497 struct macsec_dev *macsec = macsec_priv(dev);
3498 struct net_device *real_dev = macsec->real_dev;
3501 err = dev_uc_add(real_dev, dev->dev_addr);
3505 if (dev->flags & IFF_ALLMULTI) {
3506 err = dev_set_allmulti(real_dev, 1);
3511 if (dev->flags & IFF_PROMISC) {
3512 err = dev_set_promiscuity(real_dev, 1);
3514 goto clear_allmulti;
3517 /* If h/w offloading is available, propagate to the device */
3518 if (macsec_is_offloaded(macsec)) {
3519 const struct macsec_ops *ops;
3520 struct macsec_context ctx;
3522 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3525 goto clear_allmulti;
3528 ctx.secy = &macsec->secy;
3529 err = macsec_offload(ops->mdo_dev_open, &ctx);
3531 goto clear_allmulti;
3534 if (netif_carrier_ok(real_dev))
3535 netif_carrier_on(dev);
3539 if (dev->flags & IFF_ALLMULTI)
3540 dev_set_allmulti(real_dev, -1);
3542 dev_uc_del(real_dev, dev->dev_addr);
3543 netif_carrier_off(dev);
3547 static int macsec_dev_stop(struct net_device *dev)
3549 struct macsec_dev *macsec = macsec_priv(dev);
3550 struct net_device *real_dev = macsec->real_dev;
3552 netif_carrier_off(dev);
3554 /* If h/w offloading is available, propagate to the device */
3555 if (macsec_is_offloaded(macsec)) {
3556 const struct macsec_ops *ops;
3557 struct macsec_context ctx;
3559 ops = macsec_get_ops(macsec, &ctx);
3561 ctx.secy = &macsec->secy;
3562 macsec_offload(ops->mdo_dev_stop, &ctx);
3566 dev_mc_unsync(real_dev, dev);
3567 dev_uc_unsync(real_dev, dev);
3569 if (dev->flags & IFF_ALLMULTI)
3570 dev_set_allmulti(real_dev, -1);
3572 if (dev->flags & IFF_PROMISC)
3573 dev_set_promiscuity(real_dev, -1);
3575 dev_uc_del(real_dev, dev->dev_addr);
3580 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3582 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3584 if (!(dev->flags & IFF_UP))
3587 if (change & IFF_ALLMULTI)
3588 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3590 if (change & IFF_PROMISC)
3591 dev_set_promiscuity(real_dev,
3592 dev->flags & IFF_PROMISC ? 1 : -1);
3595 static void macsec_dev_set_rx_mode(struct net_device *dev)
3597 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3599 dev_mc_sync(real_dev, dev);
3600 dev_uc_sync(real_dev, dev);
3603 static int macsec_set_mac_address(struct net_device *dev, void *p)
3605 struct macsec_dev *macsec = macsec_priv(dev);
3606 struct net_device *real_dev = macsec->real_dev;
3607 struct sockaddr *addr = p;
3610 if (!is_valid_ether_addr(addr->sa_data))
3611 return -EADDRNOTAVAIL;
3613 if (!(dev->flags & IFF_UP))
3616 err = dev_uc_add(real_dev, addr->sa_data);
3620 dev_uc_del(real_dev, dev->dev_addr);
3623 eth_hw_addr_set(dev, addr->sa_data);
3624 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
3626 /* If h/w offloading is available, propagate to the device */
3627 if (macsec_is_offloaded(macsec)) {
3628 const struct macsec_ops *ops;
3629 struct macsec_context ctx;
3631 ops = macsec_get_ops(macsec, &ctx);
3633 ctx.secy = &macsec->secy;
3634 macsec_offload(ops->mdo_upd_secy, &ctx);
3641 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3643 struct macsec_dev *macsec = macsec_priv(dev);
3644 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3646 if (macsec->real_dev->mtu - extra < new_mtu)
3654 static void macsec_get_stats64(struct net_device *dev,
3655 struct rtnl_link_stats64 *s)
3660 dev_fetch_sw_netstats(s, dev->tstats);
3662 s->rx_dropped = dev->stats.rx_dropped;
3663 s->tx_dropped = dev->stats.tx_dropped;
3666 static int macsec_get_iflink(const struct net_device *dev)
3668 return macsec_priv(dev)->real_dev->ifindex;
3671 static const struct net_device_ops macsec_netdev_ops = {
3672 .ndo_init = macsec_dev_init,
3673 .ndo_uninit = macsec_dev_uninit,
3674 .ndo_open = macsec_dev_open,
3675 .ndo_stop = macsec_dev_stop,
3676 .ndo_fix_features = macsec_fix_features,
3677 .ndo_change_mtu = macsec_change_mtu,
3678 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3679 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3680 .ndo_set_mac_address = macsec_set_mac_address,
3681 .ndo_start_xmit = macsec_start_xmit,
3682 .ndo_get_stats64 = macsec_get_stats64,
3683 .ndo_get_iflink = macsec_get_iflink,
3686 static const struct device_type macsec_type = {
3690 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3691 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3692 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3693 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3694 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3695 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3696 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3697 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3698 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3699 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3700 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3701 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3702 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3703 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3706 static void macsec_free_netdev(struct net_device *dev)
3708 struct macsec_dev *macsec = macsec_priv(dev);
3710 free_percpu(macsec->stats);
3711 free_percpu(macsec->secy.tx_sc.stats);
3713 /* Get rid of the macsec's reference to real_dev */
3714 dev_put_track(macsec->real_dev, &macsec->dev_tracker);
3717 static void macsec_setup(struct net_device *dev)
3721 dev->max_mtu = ETH_MAX_MTU;
3722 dev->priv_flags |= IFF_NO_QUEUE;
3723 dev->netdev_ops = &macsec_netdev_ops;
3724 dev->needs_free_netdev = true;
3725 dev->priv_destructor = macsec_free_netdev;
3726 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3728 eth_zero_addr(dev->broadcast);
3731 static int macsec_changelink_common(struct net_device *dev,
3732 struct nlattr *data[])
3734 struct macsec_secy *secy;
3735 struct macsec_tx_sc *tx_sc;
3737 secy = &macsec_priv(dev)->secy;
3738 tx_sc = &secy->tx_sc;
3740 if (data[IFLA_MACSEC_ENCODING_SA]) {
3741 struct macsec_tx_sa *tx_sa;
3743 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3744 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3746 secy->operational = tx_sa && tx_sa->active;
3749 if (data[IFLA_MACSEC_WINDOW])
3750 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3752 if (data[IFLA_MACSEC_ENCRYPT])
3753 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3755 if (data[IFLA_MACSEC_PROTECT])
3756 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3758 if (data[IFLA_MACSEC_INC_SCI])
3759 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3761 if (data[IFLA_MACSEC_ES])
3762 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3764 if (data[IFLA_MACSEC_SCB])
3765 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3767 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3768 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3770 if (data[IFLA_MACSEC_VALIDATION])
3771 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3773 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3774 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3775 case MACSEC_CIPHER_ID_GCM_AES_128:
3776 case MACSEC_DEFAULT_CIPHER_ID:
3777 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3780 case MACSEC_CIPHER_ID_GCM_AES_256:
3781 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3784 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3785 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3788 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3789 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3800 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3801 struct nlattr *data[],
3802 struct netlink_ext_ack *extack)
3804 struct macsec_dev *macsec = macsec_priv(dev);
3805 struct macsec_tx_sc tx_sc;
3806 struct macsec_secy secy;
3812 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3813 data[IFLA_MACSEC_ICV_LEN] ||
3814 data[IFLA_MACSEC_SCI] ||
3815 data[IFLA_MACSEC_PORT])
3818 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3819 * propagation fails, to revert macsec_changelink_common.
3821 memcpy(&secy, &macsec->secy, sizeof(secy));
3822 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3824 ret = macsec_changelink_common(dev, data);
3828 /* If h/w offloading is available, propagate to the device */
3829 if (macsec_is_offloaded(macsec)) {
3830 const struct macsec_ops *ops;
3831 struct macsec_context ctx;
3834 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3840 ctx.secy = &macsec->secy;
3841 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3849 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3850 memcpy(&macsec->secy, &secy, sizeof(secy));
3855 static void macsec_del_dev(struct macsec_dev *macsec)
3859 while (macsec->secy.rx_sc) {
3860 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3862 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3866 for (i = 0; i < MACSEC_NUM_AN; i++) {
3867 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3870 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3876 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3878 struct macsec_dev *macsec = macsec_priv(dev);
3879 struct net_device *real_dev = macsec->real_dev;
3881 /* If h/w offloading is available, propagate to the device */
3882 if (macsec_is_offloaded(macsec)) {
3883 const struct macsec_ops *ops;
3884 struct macsec_context ctx;
3886 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3888 ctx.secy = &macsec->secy;
3889 macsec_offload(ops->mdo_del_secy, &ctx);
3893 unregister_netdevice_queue(dev, head);
3894 list_del_rcu(&macsec->secys);
3895 macsec_del_dev(macsec);
3896 netdev_upper_dev_unlink(real_dev, dev);
3898 macsec_generation++;
3901 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3903 struct macsec_dev *macsec = macsec_priv(dev);
3904 struct net_device *real_dev = macsec->real_dev;
3905 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3907 macsec_common_dellink(dev, head);
3909 if (list_empty(&rxd->secys)) {
3910 netdev_rx_handler_unregister(real_dev);
3915 static int register_macsec_dev(struct net_device *real_dev,
3916 struct net_device *dev)
3918 struct macsec_dev *macsec = macsec_priv(dev);
3919 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3924 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3928 INIT_LIST_HEAD(&rxd->secys);
3930 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3938 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3942 static bool sci_exists(struct net_device *dev, sci_t sci)
3944 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3945 struct macsec_dev *macsec;
3947 list_for_each_entry(macsec, &rxd->secys, secys) {
3948 if (macsec->secy.sci == sci)
3955 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3957 struct macsec_dev *macsec = macsec_priv(dev);
3958 struct macsec_secy *secy = &macsec->secy;
3960 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3964 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3965 if (!secy->tx_sc.stats) {
3966 free_percpu(macsec->stats);
3970 if (sci == MACSEC_UNDEF_SCI)
3971 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3974 secy->operational = true;
3975 secy->key_len = DEFAULT_SAK_LEN;
3976 secy->icv_len = icv_len;
3977 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3978 secy->protect_frames = true;
3979 secy->replay_protect = false;
3980 secy->xpn = DEFAULT_XPN;
3983 secy->tx_sc.active = true;
3984 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3985 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3986 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3987 secy->tx_sc.end_station = false;
3988 secy->tx_sc.scb = false;
3993 static struct lock_class_key macsec_netdev_addr_lock_key;
3995 static int macsec_newlink(struct net *net, struct net_device *dev,
3996 struct nlattr *tb[], struct nlattr *data[],
3997 struct netlink_ext_ack *extack)
3999 struct macsec_dev *macsec = macsec_priv(dev);
4000 rx_handler_func_t *rx_handler;
4001 u8 icv_len = DEFAULT_ICV_LEN;
4002 struct net_device *real_dev;
4008 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4011 if (real_dev->type != ARPHRD_ETHER)
4014 dev->priv_flags |= IFF_MACSEC;
4016 macsec->real_dev = real_dev;
4018 if (data && data[IFLA_MACSEC_OFFLOAD])
4019 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4021 /* MACsec offloading is off by default */
4022 macsec->offload = MACSEC_OFFLOAD_OFF;
4024 /* Check if the offloading mode is supported by the underlying layers */
4025 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4026 !macsec_check_offload(macsec->offload, macsec))
4029 /* send_sci must be set to true when transmit sci explicitly is set */
4030 if ((data && data[IFLA_MACSEC_SCI]) &&
4031 (data && data[IFLA_MACSEC_INC_SCI])) {
4032 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4038 if (data && data[IFLA_MACSEC_ICV_LEN])
4039 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4040 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4046 rx_handler = rtnl_dereference(real_dev->rx_handler);
4047 if (rx_handler && rx_handler != macsec_handle_frame)
4050 err = register_netdevice(dev);
4054 netdev_lockdep_set_classes(dev);
4055 lockdep_set_class(&dev->addr_list_lock,
4056 &macsec_netdev_addr_lock_key);
4058 err = netdev_upper_dev_link(real_dev, dev, extack);
4062 /* need to be already registered so that ->init has run and
4063 * the MAC addr is set
4065 if (data && data[IFLA_MACSEC_SCI])
4066 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4067 else if (data && data[IFLA_MACSEC_PORT])
4068 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4070 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4072 if (rx_handler && sci_exists(real_dev, sci)) {
4077 err = macsec_add_dev(dev, sci, icv_len);
4082 err = macsec_changelink_common(dev, data);
4087 /* If h/w offloading is available, propagate to the device */
4088 if (macsec_is_offloaded(macsec)) {
4089 const struct macsec_ops *ops;
4090 struct macsec_context ctx;
4092 ops = macsec_get_ops(macsec, &ctx);
4094 ctx.secy = &macsec->secy;
4095 err = macsec_offload(ops->mdo_add_secy, &ctx);
4101 err = register_macsec_dev(real_dev, dev);
4105 netif_stacked_transfer_operstate(real_dev, dev);
4106 linkwatch_fire_event(dev);
4108 macsec_generation++;
4113 macsec_del_dev(macsec);
4115 netdev_upper_dev_unlink(real_dev, dev);
4117 unregister_netdevice(dev);
4121 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4122 struct netlink_ext_ack *extack)
4124 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4125 u8 icv_len = DEFAULT_ICV_LEN;
4132 if (data[IFLA_MACSEC_CIPHER_SUITE])
4133 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4135 if (data[IFLA_MACSEC_ICV_LEN]) {
4136 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4137 if (icv_len != DEFAULT_ICV_LEN) {
4138 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4139 struct crypto_aead *dummy_tfm;
4141 dummy_tfm = macsec_alloc_tfm(dummy_key,
4144 if (IS_ERR(dummy_tfm))
4145 return PTR_ERR(dummy_tfm);
4146 crypto_free_aead(dummy_tfm);
4151 case MACSEC_CIPHER_ID_GCM_AES_128:
4152 case MACSEC_CIPHER_ID_GCM_AES_256:
4153 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4154 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4155 case MACSEC_DEFAULT_CIPHER_ID:
4156 if (icv_len < MACSEC_MIN_ICV_LEN ||
4157 icv_len > MACSEC_STD_ICV_LEN)
4164 if (data[IFLA_MACSEC_ENCODING_SA]) {
4165 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4169 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4170 flag < IFLA_MACSEC_VALIDATION;
4173 if (nla_get_u8(data[flag]) > 1)
4178 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4179 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4180 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4182 if ((sci && (scb || es)) || (scb && es))
4185 if (data[IFLA_MACSEC_VALIDATION] &&
4186 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4189 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4190 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4191 !data[IFLA_MACSEC_WINDOW])
4197 static struct net *macsec_get_link_net(const struct net_device *dev)
4199 return dev_net(macsec_priv(dev)->real_dev);
4202 static size_t macsec_get_size(const struct net_device *dev)
4204 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4205 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4206 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4207 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4208 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4209 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4210 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4211 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4212 nla_total_size(1) + /* IFLA_MACSEC_ES */
4213 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4214 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4215 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4219 static int macsec_fill_info(struct sk_buff *skb,
4220 const struct net_device *dev)
4222 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4223 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4226 switch (secy->key_len) {
4227 case MACSEC_GCM_AES_128_SAK_LEN:
4228 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4230 case MACSEC_GCM_AES_256_SAK_LEN:
4231 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4234 goto nla_put_failure;
4237 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4239 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4240 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4241 csid, IFLA_MACSEC_PAD) ||
4242 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4243 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4244 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4245 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4246 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4247 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4248 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4249 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4251 goto nla_put_failure;
4253 if (secy->replay_protect) {
4254 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4255 goto nla_put_failure;
4264 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4266 .priv_size = sizeof(struct macsec_dev),
4267 .maxtype = IFLA_MACSEC_MAX,
4268 .policy = macsec_rtnl_policy,
4269 .setup = macsec_setup,
4270 .validate = macsec_validate_attr,
4271 .newlink = macsec_newlink,
4272 .changelink = macsec_changelink,
4273 .dellink = macsec_dellink,
4274 .get_size = macsec_get_size,
4275 .fill_info = macsec_fill_info,
4276 .get_link_net = macsec_get_link_net,
4279 static bool is_macsec_master(struct net_device *dev)
4281 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4284 static int macsec_notify(struct notifier_block *this, unsigned long event,
4287 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4290 if (!is_macsec_master(real_dev))
4296 case NETDEV_CHANGE: {
4297 struct macsec_dev *m, *n;
4298 struct macsec_rxh_data *rxd;
4300 rxd = macsec_data_rtnl(real_dev);
4301 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4302 struct net_device *dev = m->secy.netdev;
4304 netif_stacked_transfer_operstate(real_dev, dev);
4308 case NETDEV_UNREGISTER: {
4309 struct macsec_dev *m, *n;
4310 struct macsec_rxh_data *rxd;
4312 rxd = macsec_data_rtnl(real_dev);
4313 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4314 macsec_common_dellink(m->secy.netdev, &head);
4317 netdev_rx_handler_unregister(real_dev);
4320 unregister_netdevice_many(&head);
4323 case NETDEV_CHANGEMTU: {
4324 struct macsec_dev *m;
4325 struct macsec_rxh_data *rxd;
4327 rxd = macsec_data_rtnl(real_dev);
4328 list_for_each_entry(m, &rxd->secys, secys) {
4329 struct net_device *dev = m->secy.netdev;
4330 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4331 macsec_extra_len(true));
4334 dev_set_mtu(dev, mtu);
4342 static struct notifier_block macsec_notifier = {
4343 .notifier_call = macsec_notify,
4346 static int __init macsec_init(void)
4350 pr_info("MACsec IEEE 802.1AE\n");
4351 err = register_netdevice_notifier(&macsec_notifier);
4355 err = rtnl_link_register(&macsec_link_ops);
4359 err = genl_register_family(&macsec_fam);
4366 rtnl_link_unregister(&macsec_link_ops);
4368 unregister_netdevice_notifier(&macsec_notifier);
4372 static void __exit macsec_exit(void)
4374 genl_unregister_family(&macsec_fam);
4375 rtnl_link_unregister(&macsec_link_ops);
4376 unregister_netdevice_notifier(&macsec_notifier);
4380 module_init(macsec_init);
4381 module_exit(macsec_exit);
4383 MODULE_ALIAS_RTNL_LINK("macsec");
4384 MODULE_ALIAS_GENL_FAMILY("macsec");
4386 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4387 MODULE_LICENSE("GPL v2");