2 * drivers/net/macsec.c - MACsec device
4 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/types.h>
13 #include <linux/skbuff.h>
14 #include <linux/socket.h>
15 #include <linux/module.h>
16 #include <crypto/aead.h>
17 #include <linux/etherdevice.h>
18 #include <linux/rtnetlink.h>
19 #include <net/genetlink.h>
21 #include <net/gro_cells.h>
22 #include <linux/if_arp.h>
24 #include <uapi/linux/if_macsec.h>
26 typedef u64 __bitwise sci_t;
28 #define MACSEC_SCI_LEN 8
30 /* SecTAG length = macsec_eth_header without the optional SCI */
31 #define MACSEC_TAG_LEN 6
33 struct macsec_eth_header {
37 #if defined(__LITTLE_ENDIAN_BITFIELD)
40 #elif defined(__BIG_ENDIAN_BITFIELD)
44 #error "Please fix <asm/byteorder.h>"
47 u8 secure_channel_id[8]; /* optional */
50 #define MACSEC_TCI_VERSION 0x80
51 #define MACSEC_TCI_ES 0x40 /* end station */
52 #define MACSEC_TCI_SC 0x20 /* SCI present */
53 #define MACSEC_TCI_SCB 0x10 /* epon */
54 #define MACSEC_TCI_E 0x08 /* encryption */
55 #define MACSEC_TCI_C 0x04 /* changed text */
56 #define MACSEC_AN_MASK 0x03 /* association number */
57 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
59 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
60 #define MIN_NON_SHORT_LEN 48
62 #define GCM_AES_IV_LEN 12
63 #define DEFAULT_ICV_LEN 16
65 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
67 #define for_each_rxsc(secy, sc) \
68 for (sc = rcu_dereference_bh(secy->rx_sc); \
70 sc = rcu_dereference_bh(sc->next))
71 #define for_each_rxsc_rtnl(secy, sc) \
72 for (sc = rtnl_dereference(secy->rx_sc); \
74 sc = rtnl_dereference(sc->next))
78 u8 secure_channel_id[8];
85 * struct macsec_key - SA key
86 * @id: user-provided key identifier
87 * @tfm: crypto struct, key storage
90 u8 id[MACSEC_KEYID_LEN];
91 struct crypto_aead *tfm;
94 struct macsec_rx_sc_stats {
95 __u64 InOctetsValidated;
96 __u64 InOctetsDecrypted;
97 __u64 InPktsUnchecked;
102 __u64 InPktsNotValid;
103 __u64 InPktsNotUsingSA;
104 __u64 InPktsUnusedSA;
107 struct macsec_rx_sa_stats {
110 __u32 InPktsNotValid;
111 __u32 InPktsNotUsingSA;
112 __u32 InPktsUnusedSA;
115 struct macsec_tx_sa_stats {
116 __u32 OutPktsProtected;
117 __u32 OutPktsEncrypted;
120 struct macsec_tx_sc_stats {
121 __u64 OutPktsProtected;
122 __u64 OutPktsEncrypted;
123 __u64 OutOctetsProtected;
124 __u64 OutOctetsEncrypted;
127 struct macsec_dev_stats {
128 __u64 OutPktsUntagged;
129 __u64 InPktsUntagged;
130 __u64 OutPktsTooLong;
133 __u64 InPktsUnknownSCI;
139 * struct macsec_rx_sa - receive secure association
141 * @next_pn: packet number expected for the next packet
142 * @lock: protects next_pn manipulations
143 * @key: key structure
144 * @stats: per-SA stats
146 struct macsec_rx_sa {
147 struct macsec_key key;
152 struct macsec_rx_sa_stats __percpu *stats;
153 struct macsec_rx_sc *sc;
157 struct pcpu_rx_sc_stats {
158 struct macsec_rx_sc_stats stats;
159 struct u64_stats_sync syncp;
163 * struct macsec_rx_sc - receive secure channel
164 * @sci: secure channel identifier for this SC
165 * @active: channel is active
166 * @sa: array of secure associations
167 * @stats: per-SC stats
169 struct macsec_rx_sc {
170 struct macsec_rx_sc __rcu *next;
173 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
174 struct pcpu_rx_sc_stats __percpu *stats;
176 struct rcu_head rcu_head;
180 * struct macsec_tx_sa - transmit secure association
182 * @next_pn: packet number to use for the next packet
183 * @lock: protects next_pn manipulations
184 * @key: key structure
185 * @stats: per-SA stats
187 struct macsec_tx_sa {
188 struct macsec_key key;
193 struct macsec_tx_sa_stats __percpu *stats;
197 struct pcpu_tx_sc_stats {
198 struct macsec_tx_sc_stats stats;
199 struct u64_stats_sync syncp;
203 * struct macsec_tx_sc - transmit secure channel
205 * @encoding_sa: association number of the SA currently in use
206 * @encrypt: encrypt packets on transmit, or authenticate only
207 * @send_sci: always include the SCI in the SecTAG
209 * @scb: single copy broadcast flag
210 * @sa: array of secure associations
211 * @stats: stats for this TXSC
213 struct macsec_tx_sc {
220 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
221 struct pcpu_tx_sc_stats __percpu *stats;
224 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
227 * struct macsec_secy - MACsec Security Entity
228 * @netdev: netdevice for this SecY
229 * @n_rx_sc: number of receive secure channels configured on this SecY
230 * @sci: secure channel identifier used for tx
231 * @key_len: length of keys used by the cipher suite
232 * @icv_len: length of ICV used by the cipher suite
233 * @validate_frames: validation mode
234 * @operational: MAC_Operational flag
235 * @protect_frames: enable protection for this SecY
236 * @replay_protect: enable packet number checks on receive
237 * @replay_window: size of the replay window
238 * @tx_sc: transmit secure channel
239 * @rx_sc: linked list of receive secure channels
242 struct net_device *netdev;
243 unsigned int n_rx_sc;
247 enum macsec_validation_type validate_frames;
252 struct macsec_tx_sc tx_sc;
253 struct macsec_rx_sc __rcu *rx_sc;
256 struct pcpu_secy_stats {
257 struct macsec_dev_stats stats;
258 struct u64_stats_sync syncp;
262 * struct macsec_dev - private data
264 * @real_dev: pointer to underlying netdevice
265 * @stats: MACsec device stats
266 * @secys: linked list of SecY's on the underlying device
269 struct macsec_secy secy;
270 struct net_device *real_dev;
271 struct pcpu_secy_stats __percpu *stats;
272 struct list_head secys;
273 struct gro_cells gro_cells;
274 unsigned int nest_level;
278 * struct macsec_rxh_data - rx_handler private argument
279 * @secys: linked list of SecY's on this underlying device
281 struct macsec_rxh_data {
282 struct list_head secys;
285 static struct macsec_dev *macsec_priv(const struct net_device *dev)
287 return (struct macsec_dev *)netdev_priv(dev);
290 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
292 return rcu_dereference_bh(dev->rx_handler_data);
295 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
297 return rtnl_dereference(dev->rx_handler_data);
301 struct aead_request *req;
303 struct macsec_tx_sa *tx_sa;
304 struct macsec_rx_sa *rx_sa;
311 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
313 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
315 if (!sa || !sa->active)
318 if (!atomic_inc_not_zero(&sa->refcnt))
324 static void free_rx_sc_rcu(struct rcu_head *head)
326 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
328 free_percpu(rx_sc->stats);
332 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
334 return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL;
337 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
339 if (atomic_dec_and_test(&sc->refcnt))
340 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
343 static void free_rxsa(struct rcu_head *head)
345 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
347 crypto_free_aead(sa->key.tfm);
348 free_percpu(sa->stats);
352 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
354 if (atomic_dec_and_test(&sa->refcnt))
355 call_rcu(&sa->rcu, free_rxsa);
358 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
360 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
362 if (!sa || !sa->active)
365 if (!atomic_inc_not_zero(&sa->refcnt))
371 static void free_txsa(struct rcu_head *head)
373 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
375 crypto_free_aead(sa->key.tfm);
376 free_percpu(sa->stats);
380 static void macsec_txsa_put(struct macsec_tx_sa *sa)
382 if (atomic_dec_and_test(&sa->refcnt))
383 call_rcu(&sa->rcu, free_txsa);
386 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
388 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
389 return (struct macsec_cb *)skb->cb;
392 #define MACSEC_PORT_ES (htons(0x0001))
393 #define MACSEC_PORT_SCB (0x0000)
394 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
396 #define DEFAULT_SAK_LEN 16
397 #define DEFAULT_SEND_SCI true
398 #define DEFAULT_ENCRYPT false
399 #define DEFAULT_ENCODING_SA 0
401 static bool send_sci(const struct macsec_secy *secy)
403 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
405 return tx_sc->send_sci ||
406 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
409 static sci_t make_sci(u8 *addr, __be16 port)
413 memcpy(&sci, addr, ETH_ALEN);
414 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
419 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
424 memcpy(&sci, hdr->secure_channel_id,
425 sizeof(hdr->secure_channel_id));
427 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
432 static unsigned int macsec_sectag_len(bool sci_present)
434 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
437 static unsigned int macsec_hdr_len(bool sci_present)
439 return macsec_sectag_len(sci_present) + ETH_HLEN;
442 static unsigned int macsec_extra_len(bool sci_present)
444 return macsec_sectag_len(sci_present) + sizeof(__be16);
447 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
448 static void macsec_fill_sectag(struct macsec_eth_header *h,
449 const struct macsec_secy *secy, u32 pn,
452 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
454 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
455 h->eth.h_proto = htons(ETH_P_MACSEC);
458 h->tci_an |= MACSEC_TCI_SC;
459 memcpy(&h->secure_channel_id, &secy->sci,
460 sizeof(h->secure_channel_id));
462 if (tx_sc->end_station)
463 h->tci_an |= MACSEC_TCI_ES;
465 h->tci_an |= MACSEC_TCI_SCB;
468 h->packet_number = htonl(pn);
470 /* with GCM, C/E clear for !encrypt, both set for encrypt */
472 h->tci_an |= MACSEC_TCI_CONFID;
473 else if (secy->icv_len != DEFAULT_ICV_LEN)
474 h->tci_an |= MACSEC_TCI_C;
476 h->tci_an |= tx_sc->encoding_sa;
479 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
481 if (data_len < MIN_NON_SHORT_LEN)
482 h->short_length = data_len;
485 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
486 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
488 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
489 int len = skb->len - 2 * ETH_ALEN;
490 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
492 /* a) It comprises at least 17 octets */
496 /* b) MACsec EtherType: already checked */
498 /* c) V bit is clear */
499 if (h->tci_an & MACSEC_TCI_VERSION)
502 /* d) ES or SCB => !SC */
503 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
504 (h->tci_an & MACSEC_TCI_SC))
507 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
511 /* rx.pn != 0 (figure 10-5) */
512 if (!h->packet_number)
515 /* length check, f) g) h) i) */
517 return len == extra_len + h->short_length;
518 return len >= extra_len + MIN_NON_SHORT_LEN;
521 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
522 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
524 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
526 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
529 gcm_iv->pn = htonl(pn);
532 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
534 return (struct macsec_eth_header *)skb_mac_header(skb);
537 static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
541 spin_lock_bh(&tx_sa->lock);
545 if (tx_sa->next_pn == 0) {
546 pr_debug("PN wrapped, transitioning to !oper\n");
547 tx_sa->active = false;
548 if (secy->protect_frames)
549 secy->operational = false;
551 spin_unlock_bh(&tx_sa->lock);
556 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
558 struct macsec_dev *macsec = netdev_priv(dev);
560 skb->dev = macsec->real_dev;
561 skb_reset_mac_header(skb);
562 skb->protocol = eth_hdr(skb)->h_proto;
565 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
566 struct macsec_tx_sa *tx_sa)
568 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
570 u64_stats_update_begin(&txsc_stats->syncp);
571 if (tx_sc->encrypt) {
572 txsc_stats->stats.OutOctetsEncrypted += skb->len;
573 txsc_stats->stats.OutPktsEncrypted++;
574 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
576 txsc_stats->stats.OutOctetsProtected += skb->len;
577 txsc_stats->stats.OutPktsProtected++;
578 this_cpu_inc(tx_sa->stats->OutPktsProtected);
580 u64_stats_update_end(&txsc_stats->syncp);
583 static void count_tx(struct net_device *dev, int ret, int len)
585 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
586 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
588 u64_stats_update_begin(&stats->syncp);
590 stats->tx_bytes += len;
591 u64_stats_update_end(&stats->syncp);
595 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
597 struct sk_buff *skb = base->data;
598 struct net_device *dev = skb->dev;
599 struct macsec_dev *macsec = macsec_priv(dev);
600 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
603 aead_request_free(macsec_skb_cb(skb)->req);
606 macsec_encrypt_finish(skb, dev);
607 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
609 ret = dev_queue_xmit(skb);
610 count_tx(dev, ret, len);
611 rcu_read_unlock_bh();
617 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
619 struct scatterlist **sg,
622 size_t size, iv_offset, sg_offset;
623 struct aead_request *req;
626 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
628 size += GCM_AES_IV_LEN;
630 size = ALIGN(size, __alignof__(struct scatterlist));
632 size += sizeof(struct scatterlist) * num_frags;
634 tmp = kmalloc(size, GFP_ATOMIC);
638 *iv = (unsigned char *)(tmp + iv_offset);
639 *sg = (struct scatterlist *)(tmp + sg_offset);
642 aead_request_set_tfm(req, tfm);
647 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
648 struct net_device *dev)
651 struct scatterlist *sg;
652 struct sk_buff *trailer;
655 struct macsec_eth_header *hh;
656 size_t unprotected_len;
657 struct aead_request *req;
658 struct macsec_secy *secy;
659 struct macsec_tx_sc *tx_sc;
660 struct macsec_tx_sa *tx_sa;
661 struct macsec_dev *macsec = macsec_priv(dev);
665 secy = &macsec->secy;
666 tx_sc = &secy->tx_sc;
668 /* 10.5.1 TX SA assignment */
669 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
671 secy->operational = false;
673 return ERR_PTR(-EINVAL);
676 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
677 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
678 struct sk_buff *nskb = skb_copy_expand(skb,
679 MACSEC_NEEDED_HEADROOM,
680 MACSEC_NEEDED_TAILROOM,
686 macsec_txsa_put(tx_sa);
688 return ERR_PTR(-ENOMEM);
691 skb = skb_unshare(skb, GFP_ATOMIC);
693 macsec_txsa_put(tx_sa);
694 return ERR_PTR(-ENOMEM);
698 unprotected_len = skb->len;
700 sci_present = send_sci(secy);
701 hh = skb_push(skb, macsec_extra_len(sci_present));
702 memmove(hh, eth, 2 * ETH_ALEN);
704 pn = tx_sa_update_pn(tx_sa, secy);
706 macsec_txsa_put(tx_sa);
708 return ERR_PTR(-ENOLINK);
710 macsec_fill_sectag(hh, secy, pn, sci_present);
711 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
713 skb_put(skb, secy->icv_len);
715 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
716 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
718 u64_stats_update_begin(&secy_stats->syncp);
719 secy_stats->stats.OutPktsTooLong++;
720 u64_stats_update_end(&secy_stats->syncp);
722 macsec_txsa_put(tx_sa);
724 return ERR_PTR(-EINVAL);
727 ret = skb_cow_data(skb, 0, &trailer);
728 if (unlikely(ret < 0)) {
729 macsec_txsa_put(tx_sa);
734 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
736 macsec_txsa_put(tx_sa);
738 return ERR_PTR(-ENOMEM);
741 macsec_fill_iv(iv, secy->sci, pn);
743 sg_init_table(sg, ret);
744 ret = skb_to_sgvec(skb, sg, 0, skb->len);
745 if (unlikely(ret < 0)) {
746 aead_request_free(req);
747 macsec_txsa_put(tx_sa);
752 if (tx_sc->encrypt) {
753 int len = skb->len - macsec_hdr_len(sci_present) -
755 aead_request_set_crypt(req, sg, sg, len, iv);
756 aead_request_set_ad(req, macsec_hdr_len(sci_present));
758 aead_request_set_crypt(req, sg, sg, 0, iv);
759 aead_request_set_ad(req, skb->len - secy->icv_len);
762 macsec_skb_cb(skb)->req = req;
763 macsec_skb_cb(skb)->tx_sa = tx_sa;
764 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
767 ret = crypto_aead_encrypt(req);
768 if (ret == -EINPROGRESS) {
770 } else if (ret != 0) {
773 aead_request_free(req);
774 macsec_txsa_put(tx_sa);
775 return ERR_PTR(-EINVAL);
779 aead_request_free(req);
780 macsec_txsa_put(tx_sa);
785 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
787 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
788 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
789 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
792 spin_lock(&rx_sa->lock);
793 if (rx_sa->next_pn >= secy->replay_window)
794 lowest_pn = rx_sa->next_pn - secy->replay_window;
796 /* Now perform replay protection check again
797 * (see IEEE 802.1AE-2006 figure 10-5)
799 if (secy->replay_protect && pn < lowest_pn) {
800 spin_unlock(&rx_sa->lock);
801 u64_stats_update_begin(&rxsc_stats->syncp);
802 rxsc_stats->stats.InPktsLate++;
803 u64_stats_update_end(&rxsc_stats->syncp);
807 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
808 u64_stats_update_begin(&rxsc_stats->syncp);
809 if (hdr->tci_an & MACSEC_TCI_E)
810 rxsc_stats->stats.InOctetsDecrypted += skb->len;
812 rxsc_stats->stats.InOctetsValidated += skb->len;
813 u64_stats_update_end(&rxsc_stats->syncp);
816 if (!macsec_skb_cb(skb)->valid) {
817 spin_unlock(&rx_sa->lock);
820 if (hdr->tci_an & MACSEC_TCI_C ||
821 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
822 u64_stats_update_begin(&rxsc_stats->syncp);
823 rxsc_stats->stats.InPktsNotValid++;
824 u64_stats_update_end(&rxsc_stats->syncp);
828 u64_stats_update_begin(&rxsc_stats->syncp);
829 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
830 rxsc_stats->stats.InPktsInvalid++;
831 this_cpu_inc(rx_sa->stats->InPktsInvalid);
832 } else if (pn < lowest_pn) {
833 rxsc_stats->stats.InPktsDelayed++;
835 rxsc_stats->stats.InPktsUnchecked++;
837 u64_stats_update_end(&rxsc_stats->syncp);
839 u64_stats_update_begin(&rxsc_stats->syncp);
840 if (pn < lowest_pn) {
841 rxsc_stats->stats.InPktsDelayed++;
843 rxsc_stats->stats.InPktsOK++;
844 this_cpu_inc(rx_sa->stats->InPktsOK);
846 u64_stats_update_end(&rxsc_stats->syncp);
848 if (pn >= rx_sa->next_pn)
849 rx_sa->next_pn = pn + 1;
850 spin_unlock(&rx_sa->lock);
856 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
858 skb->pkt_type = PACKET_HOST;
859 skb->protocol = eth_type_trans(skb, dev);
861 skb_reset_network_header(skb);
862 if (!skb_transport_header_was_set(skb))
863 skb_reset_transport_header(skb);
864 skb_reset_mac_len(skb);
867 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
869 skb->ip_summed = CHECKSUM_NONE;
870 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
871 skb_pull(skb, hdr_len);
872 pskb_trim_unique(skb, skb->len - icv_len);
875 static void count_rx(struct net_device *dev, int len)
877 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
879 u64_stats_update_begin(&stats->syncp);
881 stats->rx_bytes += len;
882 u64_stats_update_end(&stats->syncp);
885 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
887 struct sk_buff *skb = base->data;
888 struct net_device *dev = skb->dev;
889 struct macsec_dev *macsec = macsec_priv(dev);
890 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
891 struct macsec_rx_sc *rx_sc = rx_sa->sc;
895 aead_request_free(macsec_skb_cb(skb)->req);
898 macsec_skb_cb(skb)->valid = true;
901 pn = ntohl(macsec_ethhdr(skb)->packet_number);
902 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
903 rcu_read_unlock_bh();
908 macsec_finalize_skb(skb, macsec->secy.icv_len,
909 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
910 macsec_reset_skb(skb, macsec->secy.netdev);
913 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
916 rcu_read_unlock_bh();
919 macsec_rxsa_put(rx_sa);
920 macsec_rxsc_put(rx_sc);
924 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
925 struct net_device *dev,
926 struct macsec_rx_sa *rx_sa,
928 struct macsec_secy *secy)
931 struct scatterlist *sg;
932 struct sk_buff *trailer;
934 struct aead_request *req;
935 struct macsec_eth_header *hdr;
936 u16 icv_len = secy->icv_len;
938 macsec_skb_cb(skb)->valid = false;
939 skb = skb_share_check(skb, GFP_ATOMIC);
941 return ERR_PTR(-ENOMEM);
943 ret = skb_cow_data(skb, 0, &trailer);
944 if (unlikely(ret < 0)) {
948 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
951 return ERR_PTR(-ENOMEM);
954 hdr = (struct macsec_eth_header *)skb->data;
955 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
957 sg_init_table(sg, ret);
958 ret = skb_to_sgvec(skb, sg, 0, skb->len);
959 if (unlikely(ret < 0)) {
960 aead_request_free(req);
965 if (hdr->tci_an & MACSEC_TCI_E) {
966 /* confidentiality: ethernet + macsec header
967 * authenticated, encrypted payload
969 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
971 aead_request_set_crypt(req, sg, sg, len, iv);
972 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
973 skb = skb_unshare(skb, GFP_ATOMIC);
975 aead_request_free(req);
976 return ERR_PTR(-ENOMEM);
979 /* integrity only: all headers + data authenticated */
980 aead_request_set_crypt(req, sg, sg, icv_len, iv);
981 aead_request_set_ad(req, skb->len - icv_len);
984 macsec_skb_cb(skb)->req = req;
986 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
989 ret = crypto_aead_decrypt(req);
990 if (ret == -EINPROGRESS) {
992 } else if (ret != 0) {
993 /* decryption/authentication failed
994 * 10.6 if validateFrames is disabled, deliver anyway
996 if (ret != -EBADMSG) {
1001 macsec_skb_cb(skb)->valid = true;
1005 aead_request_free(req);
1010 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
1012 struct macsec_rx_sc *rx_sc;
1014 for_each_rxsc(secy, rx_sc) {
1015 if (rx_sc->sci == sci)
1022 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
1024 struct macsec_rx_sc *rx_sc;
1026 for_each_rxsc_rtnl(secy, rx_sc) {
1027 if (rx_sc->sci == sci)
1034 static void handle_not_macsec(struct sk_buff *skb)
1036 struct macsec_rxh_data *rxd;
1037 struct macsec_dev *macsec;
1040 rxd = macsec_data_rcu(skb->dev);
1042 /* 10.6 If the management control validateFrames is not
1043 * Strict, frames without a SecTAG are received, counted, and
1044 * delivered to the Controlled Port
1046 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1047 struct sk_buff *nskb;
1048 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1050 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1051 u64_stats_update_begin(&secy_stats->syncp);
1052 secy_stats->stats.InPktsNoTag++;
1053 u64_stats_update_end(&secy_stats->syncp);
1057 /* deliver on this port */
1058 nskb = skb_clone(skb, GFP_ATOMIC);
1062 nskb->dev = macsec->secy.netdev;
1064 if (netif_rx(nskb) == NET_RX_SUCCESS) {
1065 u64_stats_update_begin(&secy_stats->syncp);
1066 secy_stats->stats.InPktsUntagged++;
1067 u64_stats_update_end(&secy_stats->syncp);
1074 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1076 struct sk_buff *skb = *pskb;
1077 struct net_device *dev = skb->dev;
1078 struct macsec_eth_header *hdr;
1079 struct macsec_secy *secy = NULL;
1080 struct macsec_rx_sc *rx_sc;
1081 struct macsec_rx_sa *rx_sa;
1082 struct macsec_rxh_data *rxd;
1083 struct macsec_dev *macsec;
1088 struct pcpu_rx_sc_stats *rxsc_stats;
1089 struct pcpu_secy_stats *secy_stats;
1093 if (skb_headroom(skb) < ETH_HLEN)
1096 hdr = macsec_ethhdr(skb);
1097 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1098 handle_not_macsec(skb);
1100 /* and deliver to the uncontrolled port */
1101 return RX_HANDLER_PASS;
1104 skb = skb_unshare(skb, GFP_ATOMIC);
1107 return RX_HANDLER_CONSUMED;
1109 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1111 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1115 hdr = macsec_ethhdr(skb);
1117 /* Frames with a SecTAG that has the TCI E bit set but the C
1118 * bit clear are discarded, as this reserved encoding is used
1119 * to identify frames with a SecTAG that are not to be
1120 * delivered to the Controlled Port.
1122 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1123 return RX_HANDLER_PASS;
1125 /* now, pull the extra length */
1126 if (hdr->tci_an & MACSEC_TCI_SC) {
1131 /* ethernet header is part of crypto processing */
1132 skb_push(skb, ETH_HLEN);
1134 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1135 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1136 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1139 rxd = macsec_data_rcu(skb->dev);
1141 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1142 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1143 sc = sc ? macsec_rxsc_get(sc) : NULL;
1146 secy = &macsec->secy;
1156 macsec = macsec_priv(dev);
1157 secy_stats = this_cpu_ptr(macsec->stats);
1158 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1160 if (!macsec_validate_skb(skb, secy->icv_len)) {
1161 u64_stats_update_begin(&secy_stats->syncp);
1162 secy_stats->stats.InPktsBadTag++;
1163 u64_stats_update_end(&secy_stats->syncp);
1167 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1169 /* 10.6.1 if the SA is not in use */
1171 /* If validateFrames is Strict or the C bit in the
1172 * SecTAG is set, discard
1174 if (hdr->tci_an & MACSEC_TCI_C ||
1175 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1176 u64_stats_update_begin(&rxsc_stats->syncp);
1177 rxsc_stats->stats.InPktsNotUsingSA++;
1178 u64_stats_update_end(&rxsc_stats->syncp);
1182 /* not Strict, the frame (with the SecTAG and ICV
1183 * removed) is delivered to the Controlled Port.
1185 u64_stats_update_begin(&rxsc_stats->syncp);
1186 rxsc_stats->stats.InPktsUnusedSA++;
1187 u64_stats_update_end(&rxsc_stats->syncp);
1191 /* First, PN check to avoid decrypting obviously wrong packets */
1192 pn = ntohl(hdr->packet_number);
1193 if (secy->replay_protect) {
1196 spin_lock(&rx_sa->lock);
1197 late = rx_sa->next_pn >= secy->replay_window &&
1198 pn < (rx_sa->next_pn - secy->replay_window);
1199 spin_unlock(&rx_sa->lock);
1202 u64_stats_update_begin(&rxsc_stats->syncp);
1203 rxsc_stats->stats.InPktsLate++;
1204 u64_stats_update_end(&rxsc_stats->syncp);
1209 macsec_skb_cb(skb)->rx_sa = rx_sa;
1211 /* Disabled && !changed text => skip validation */
1212 if (hdr->tci_an & MACSEC_TCI_C ||
1213 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1214 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1217 /* the decrypt callback needs the reference */
1218 if (PTR_ERR(skb) != -EINPROGRESS) {
1219 macsec_rxsa_put(rx_sa);
1220 macsec_rxsc_put(rx_sc);
1224 return RX_HANDLER_CONSUMED;
1227 if (!macsec_post_decrypt(skb, secy, pn))
1231 macsec_finalize_skb(skb, secy->icv_len,
1232 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1233 macsec_reset_skb(skb, secy->netdev);
1236 macsec_rxsa_put(rx_sa);
1237 macsec_rxsc_put(rx_sc);
1241 ret = gro_cells_receive(&macsec->gro_cells, skb);
1242 if (ret == NET_RX_SUCCESS)
1245 macsec->secy.netdev->stats.rx_dropped++;
1250 return RX_HANDLER_CONSUMED;
1253 macsec_rxsa_put(rx_sa);
1255 macsec_rxsc_put(rx_sc);
1260 return RX_HANDLER_CONSUMED;
1263 /* 10.6.1 if the SC is not found */
1264 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1266 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1267 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1269 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1270 struct sk_buff *nskb;
1272 secy_stats = this_cpu_ptr(macsec->stats);
1274 /* If validateFrames is Strict or the C bit in the
1275 * SecTAG is set, discard
1278 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1279 u64_stats_update_begin(&secy_stats->syncp);
1280 secy_stats->stats.InPktsNoSCI++;
1281 u64_stats_update_end(&secy_stats->syncp);
1285 /* not strict, the frame (with the SecTAG and ICV
1286 * removed) is delivered to the Controlled Port.
1288 nskb = skb_clone(skb, GFP_ATOMIC);
1292 macsec_reset_skb(nskb, macsec->secy.netdev);
1294 ret = netif_rx(nskb);
1295 if (ret == NET_RX_SUCCESS) {
1296 u64_stats_update_begin(&secy_stats->syncp);
1297 secy_stats->stats.InPktsUnknownSCI++;
1298 u64_stats_update_end(&secy_stats->syncp);
1300 macsec->secy.netdev->stats.rx_dropped++;
1306 return RX_HANDLER_PASS;
1309 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1311 struct crypto_aead *tfm;
1314 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1315 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1320 ret = crypto_aead_setkey(tfm, key, key_len);
1324 ret = crypto_aead_setauthsize(tfm, icv_len);
1330 crypto_free_aead(tfm);
1331 return ERR_PTR(ret);
1334 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1337 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1341 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1342 if (IS_ERR(rx_sa->key.tfm)) {
1343 free_percpu(rx_sa->stats);
1344 return PTR_ERR(rx_sa->key.tfm);
1347 rx_sa->active = false;
1349 atomic_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 atomic_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->active = false;
1446 atomic_set(&tx_sa->refcnt, 1);
1447 spin_lock_init(&tx_sa->lock);
1452 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1454 tx_sa->active = false;
1456 macsec_txsa_put(tx_sa);
1459 static struct genl_family macsec_fam;
1461 static struct net_device *get_dev_from_nl(struct net *net,
1462 struct nlattr **attrs)
1464 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1465 struct net_device *dev;
1467 dev = __dev_get_by_index(net, ifindex);
1469 return ERR_PTR(-ENODEV);
1471 if (!netif_is_macsec(dev))
1472 return ERR_PTR(-ENODEV);
1477 static sci_t nla_get_sci(const struct nlattr *nla)
1479 return (__force sci_t)nla_get_u64(nla);
1482 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1485 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1488 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1489 struct nlattr **attrs,
1490 struct nlattr **tb_sa,
1491 struct net_device **devp,
1492 struct macsec_secy **secyp,
1493 struct macsec_tx_sc **scp,
1496 struct net_device *dev;
1497 struct macsec_secy *secy;
1498 struct macsec_tx_sc *tx_sc;
1499 struct macsec_tx_sa *tx_sa;
1501 if (!tb_sa[MACSEC_SA_ATTR_AN])
1502 return ERR_PTR(-EINVAL);
1504 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1506 dev = get_dev_from_nl(net, attrs);
1508 return ERR_CAST(dev);
1510 if (*assoc_num >= MACSEC_NUM_AN)
1511 return ERR_PTR(-EINVAL);
1513 secy = &macsec_priv(dev)->secy;
1514 tx_sc = &secy->tx_sc;
1516 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1518 return ERR_PTR(-ENODEV);
1526 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1527 struct nlattr **attrs,
1528 struct nlattr **tb_rxsc,
1529 struct net_device **devp,
1530 struct macsec_secy **secyp)
1532 struct net_device *dev;
1533 struct macsec_secy *secy;
1534 struct macsec_rx_sc *rx_sc;
1537 dev = get_dev_from_nl(net, attrs);
1539 return ERR_CAST(dev);
1541 secy = &macsec_priv(dev)->secy;
1543 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1544 return ERR_PTR(-EINVAL);
1546 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1547 rx_sc = find_rx_sc_rtnl(secy, sci);
1549 return ERR_PTR(-ENODEV);
1557 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1558 struct nlattr **attrs,
1559 struct nlattr **tb_rxsc,
1560 struct nlattr **tb_sa,
1561 struct net_device **devp,
1562 struct macsec_secy **secyp,
1563 struct macsec_rx_sc **scp,
1566 struct macsec_rx_sc *rx_sc;
1567 struct macsec_rx_sa *rx_sa;
1569 if (!tb_sa[MACSEC_SA_ATTR_AN])
1570 return ERR_PTR(-EINVAL);
1572 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1573 if (*assoc_num >= MACSEC_NUM_AN)
1574 return ERR_PTR(-EINVAL);
1576 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1578 return ERR_CAST(rx_sc);
1580 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1582 return ERR_PTR(-ENODEV);
1589 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1590 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1591 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1592 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1595 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1596 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1597 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1600 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1601 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1602 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1603 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1604 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1605 .len = MACSEC_KEYID_LEN, },
1606 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1607 .len = MACSEC_MAX_KEY_LEN, },
1610 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1612 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1615 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX,
1616 attrs[MACSEC_ATTR_SA_CONFIG],
1617 macsec_genl_sa_policy, NULL))
1623 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1625 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1628 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX,
1629 attrs[MACSEC_ATTR_RXSC_CONFIG],
1630 macsec_genl_rxsc_policy, NULL))
1636 static bool validate_add_rxsa(struct nlattr **attrs)
1638 if (!attrs[MACSEC_SA_ATTR_AN] ||
1639 !attrs[MACSEC_SA_ATTR_KEY] ||
1640 !attrs[MACSEC_SA_ATTR_KEYID])
1643 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1646 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1649 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1650 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1654 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1660 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1662 struct net_device *dev;
1663 struct nlattr **attrs = info->attrs;
1664 struct macsec_secy *secy;
1665 struct macsec_rx_sc *rx_sc;
1666 struct macsec_rx_sa *rx_sa;
1667 unsigned char assoc_num;
1668 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1669 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1672 if (!attrs[MACSEC_ATTR_IFINDEX])
1675 if (parse_sa_config(attrs, tb_sa))
1678 if (parse_rxsc_config(attrs, tb_rxsc))
1681 if (!validate_add_rxsa(tb_sa))
1685 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1686 if (IS_ERR(rx_sc)) {
1688 return PTR_ERR(rx_sc);
1691 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1693 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1694 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1695 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1700 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1706 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1712 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1713 secy->key_len, secy->icv_len);
1720 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1721 spin_lock_bh(&rx_sa->lock);
1722 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1723 spin_unlock_bh(&rx_sa->lock);
1726 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1727 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1729 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1731 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1738 static bool validate_add_rxsc(struct nlattr **attrs)
1740 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1743 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1744 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1751 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1753 struct net_device *dev;
1754 sci_t sci = MACSEC_UNDEF_SCI;
1755 struct nlattr **attrs = info->attrs;
1756 struct macsec_rx_sc *rx_sc;
1757 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1759 if (!attrs[MACSEC_ATTR_IFINDEX])
1762 if (parse_rxsc_config(attrs, tb_rxsc))
1765 if (!validate_add_rxsc(tb_rxsc))
1769 dev = get_dev_from_nl(genl_info_net(info), attrs);
1772 return PTR_ERR(dev);
1775 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1777 rx_sc = create_rx_sc(dev, sci);
1778 if (IS_ERR(rx_sc)) {
1780 return PTR_ERR(rx_sc);
1783 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1784 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1791 static bool validate_add_txsa(struct nlattr **attrs)
1793 if (!attrs[MACSEC_SA_ATTR_AN] ||
1794 !attrs[MACSEC_SA_ATTR_PN] ||
1795 !attrs[MACSEC_SA_ATTR_KEY] ||
1796 !attrs[MACSEC_SA_ATTR_KEYID])
1799 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1802 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1805 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1806 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1810 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1816 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1818 struct net_device *dev;
1819 struct nlattr **attrs = info->attrs;
1820 struct macsec_secy *secy;
1821 struct macsec_tx_sc *tx_sc;
1822 struct macsec_tx_sa *tx_sa;
1823 unsigned char assoc_num;
1824 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1827 if (!attrs[MACSEC_ATTR_IFINDEX])
1830 if (parse_sa_config(attrs, tb_sa))
1833 if (!validate_add_txsa(tb_sa))
1837 dev = get_dev_from_nl(genl_info_net(info), attrs);
1840 return PTR_ERR(dev);
1843 secy = &macsec_priv(dev)->secy;
1844 tx_sc = &secy->tx_sc;
1846 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1848 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1849 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1850 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1855 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1861 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1867 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1868 secy->key_len, secy->icv_len);
1875 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1877 spin_lock_bh(&tx_sa->lock);
1878 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1879 spin_unlock_bh(&tx_sa->lock);
1881 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1882 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1884 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1885 secy->operational = true;
1887 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1894 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1896 struct nlattr **attrs = info->attrs;
1897 struct net_device *dev;
1898 struct macsec_secy *secy;
1899 struct macsec_rx_sc *rx_sc;
1900 struct macsec_rx_sa *rx_sa;
1902 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1903 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1905 if (!attrs[MACSEC_ATTR_IFINDEX])
1908 if (parse_sa_config(attrs, tb_sa))
1911 if (parse_rxsc_config(attrs, tb_rxsc))
1915 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1916 &dev, &secy, &rx_sc, &assoc_num);
1917 if (IS_ERR(rx_sa)) {
1919 return PTR_ERR(rx_sa);
1922 if (rx_sa->active) {
1927 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1935 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1937 struct nlattr **attrs = info->attrs;
1938 struct net_device *dev;
1939 struct macsec_secy *secy;
1940 struct macsec_rx_sc *rx_sc;
1942 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1944 if (!attrs[MACSEC_ATTR_IFINDEX])
1947 if (parse_rxsc_config(attrs, tb_rxsc))
1950 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1954 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1957 return PTR_ERR(dev);
1960 secy = &macsec_priv(dev)->secy;
1961 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1963 rx_sc = del_rx_sc(secy, sci);
1975 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1977 struct nlattr **attrs = info->attrs;
1978 struct net_device *dev;
1979 struct macsec_secy *secy;
1980 struct macsec_tx_sc *tx_sc;
1981 struct macsec_tx_sa *tx_sa;
1983 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1985 if (!attrs[MACSEC_ATTR_IFINDEX])
1988 if (parse_sa_config(attrs, tb_sa))
1992 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1993 &dev, &secy, &tx_sc, &assoc_num);
1994 if (IS_ERR(tx_sa)) {
1996 return PTR_ERR(tx_sa);
1999 if (tx_sa->active) {
2004 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2012 static bool validate_upd_sa(struct nlattr **attrs)
2014 if (!attrs[MACSEC_SA_ATTR_AN] ||
2015 attrs[MACSEC_SA_ATTR_KEY] ||
2016 attrs[MACSEC_SA_ATTR_KEYID])
2019 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2022 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2025 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2026 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2033 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2035 struct nlattr **attrs = info->attrs;
2036 struct net_device *dev;
2037 struct macsec_secy *secy;
2038 struct macsec_tx_sc *tx_sc;
2039 struct macsec_tx_sa *tx_sa;
2041 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2043 if (!attrs[MACSEC_ATTR_IFINDEX])
2046 if (parse_sa_config(attrs, tb_sa))
2049 if (!validate_upd_sa(tb_sa))
2053 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2054 &dev, &secy, &tx_sc, &assoc_num);
2055 if (IS_ERR(tx_sa)) {
2057 return PTR_ERR(tx_sa);
2060 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2061 spin_lock_bh(&tx_sa->lock);
2062 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2063 spin_unlock_bh(&tx_sa->lock);
2066 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2067 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2069 if (assoc_num == tx_sc->encoding_sa)
2070 secy->operational = tx_sa->active;
2077 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2079 struct nlattr **attrs = info->attrs;
2080 struct net_device *dev;
2081 struct macsec_secy *secy;
2082 struct macsec_rx_sc *rx_sc;
2083 struct macsec_rx_sa *rx_sa;
2085 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2086 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2088 if (!attrs[MACSEC_ATTR_IFINDEX])
2091 if (parse_rxsc_config(attrs, tb_rxsc))
2094 if (parse_sa_config(attrs, tb_sa))
2097 if (!validate_upd_sa(tb_sa))
2101 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2102 &dev, &secy, &rx_sc, &assoc_num);
2103 if (IS_ERR(rx_sa)) {
2105 return PTR_ERR(rx_sa);
2108 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2109 spin_lock_bh(&rx_sa->lock);
2110 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2111 spin_unlock_bh(&rx_sa->lock);
2114 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2115 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2121 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2123 struct nlattr **attrs = info->attrs;
2124 struct net_device *dev;
2125 struct macsec_secy *secy;
2126 struct macsec_rx_sc *rx_sc;
2127 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2129 if (!attrs[MACSEC_ATTR_IFINDEX])
2132 if (parse_rxsc_config(attrs, tb_rxsc))
2135 if (!validate_add_rxsc(tb_rxsc))
2139 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2140 if (IS_ERR(rx_sc)) {
2142 return PTR_ERR(rx_sc);
2145 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2146 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2148 if (rx_sc->active != new)
2149 secy->n_rx_sc += new ? 1 : -1;
2151 rx_sc->active = new;
2159 static int copy_tx_sa_stats(struct sk_buff *skb,
2160 struct macsec_tx_sa_stats __percpu *pstats)
2162 struct macsec_tx_sa_stats sum = {0, };
2165 for_each_possible_cpu(cpu) {
2166 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2168 sum.OutPktsProtected += stats->OutPktsProtected;
2169 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2172 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2173 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2179 static int copy_rx_sa_stats(struct sk_buff *skb,
2180 struct macsec_rx_sa_stats __percpu *pstats)
2182 struct macsec_rx_sa_stats sum = {0, };
2185 for_each_possible_cpu(cpu) {
2186 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2188 sum.InPktsOK += stats->InPktsOK;
2189 sum.InPktsInvalid += stats->InPktsInvalid;
2190 sum.InPktsNotValid += stats->InPktsNotValid;
2191 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2192 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2195 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2196 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2197 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2198 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2199 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2205 static int copy_rx_sc_stats(struct sk_buff *skb,
2206 struct pcpu_rx_sc_stats __percpu *pstats)
2208 struct macsec_rx_sc_stats sum = {0, };
2211 for_each_possible_cpu(cpu) {
2212 const struct pcpu_rx_sc_stats *stats;
2213 struct macsec_rx_sc_stats tmp;
2216 stats = per_cpu_ptr(pstats, cpu);
2218 start = u64_stats_fetch_begin_irq(&stats->syncp);
2219 memcpy(&tmp, &stats->stats, sizeof(tmp));
2220 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2222 sum.InOctetsValidated += tmp.InOctetsValidated;
2223 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2224 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2225 sum.InPktsDelayed += tmp.InPktsDelayed;
2226 sum.InPktsOK += tmp.InPktsOK;
2227 sum.InPktsInvalid += tmp.InPktsInvalid;
2228 sum.InPktsLate += tmp.InPktsLate;
2229 sum.InPktsNotValid += tmp.InPktsNotValid;
2230 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2231 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2234 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2235 sum.InOctetsValidated,
2236 MACSEC_RXSC_STATS_ATTR_PAD) ||
2237 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2238 sum.InOctetsDecrypted,
2239 MACSEC_RXSC_STATS_ATTR_PAD) ||
2240 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2241 sum.InPktsUnchecked,
2242 MACSEC_RXSC_STATS_ATTR_PAD) ||
2243 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2245 MACSEC_RXSC_STATS_ATTR_PAD) ||
2246 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2248 MACSEC_RXSC_STATS_ATTR_PAD) ||
2249 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2251 MACSEC_RXSC_STATS_ATTR_PAD) ||
2252 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2254 MACSEC_RXSC_STATS_ATTR_PAD) ||
2255 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2257 MACSEC_RXSC_STATS_ATTR_PAD) ||
2258 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2259 sum.InPktsNotUsingSA,
2260 MACSEC_RXSC_STATS_ATTR_PAD) ||
2261 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2263 MACSEC_RXSC_STATS_ATTR_PAD))
2269 static int copy_tx_sc_stats(struct sk_buff *skb,
2270 struct pcpu_tx_sc_stats __percpu *pstats)
2272 struct macsec_tx_sc_stats sum = {0, };
2275 for_each_possible_cpu(cpu) {
2276 const struct pcpu_tx_sc_stats *stats;
2277 struct macsec_tx_sc_stats tmp;
2280 stats = per_cpu_ptr(pstats, cpu);
2282 start = u64_stats_fetch_begin_irq(&stats->syncp);
2283 memcpy(&tmp, &stats->stats, sizeof(tmp));
2284 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2286 sum.OutPktsProtected += tmp.OutPktsProtected;
2287 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2288 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2289 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2292 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2293 sum.OutPktsProtected,
2294 MACSEC_TXSC_STATS_ATTR_PAD) ||
2295 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2296 sum.OutPktsEncrypted,
2297 MACSEC_TXSC_STATS_ATTR_PAD) ||
2298 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2299 sum.OutOctetsProtected,
2300 MACSEC_TXSC_STATS_ATTR_PAD) ||
2301 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2302 sum.OutOctetsEncrypted,
2303 MACSEC_TXSC_STATS_ATTR_PAD))
2309 static int copy_secy_stats(struct sk_buff *skb,
2310 struct pcpu_secy_stats __percpu *pstats)
2312 struct macsec_dev_stats sum = {0, };
2315 for_each_possible_cpu(cpu) {
2316 const struct pcpu_secy_stats *stats;
2317 struct macsec_dev_stats tmp;
2320 stats = per_cpu_ptr(pstats, cpu);
2322 start = u64_stats_fetch_begin_irq(&stats->syncp);
2323 memcpy(&tmp, &stats->stats, sizeof(tmp));
2324 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2326 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2327 sum.InPktsUntagged += tmp.InPktsUntagged;
2328 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2329 sum.InPktsNoTag += tmp.InPktsNoTag;
2330 sum.InPktsBadTag += tmp.InPktsBadTag;
2331 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2332 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2333 sum.InPktsOverrun += tmp.InPktsOverrun;
2336 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2337 sum.OutPktsUntagged,
2338 MACSEC_SECY_STATS_ATTR_PAD) ||
2339 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2341 MACSEC_SECY_STATS_ATTR_PAD) ||
2342 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2344 MACSEC_SECY_STATS_ATTR_PAD) ||
2345 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2347 MACSEC_SECY_STATS_ATTR_PAD) ||
2348 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2350 MACSEC_SECY_STATS_ATTR_PAD) ||
2351 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2352 sum.InPktsUnknownSCI,
2353 MACSEC_SECY_STATS_ATTR_PAD) ||
2354 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2356 MACSEC_SECY_STATS_ATTR_PAD) ||
2357 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2359 MACSEC_SECY_STATS_ATTR_PAD))
2365 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2367 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2368 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2373 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2374 MACSEC_SECY_ATTR_PAD) ||
2375 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2376 MACSEC_DEFAULT_CIPHER_ID,
2377 MACSEC_SECY_ATTR_PAD) ||
2378 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2379 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2380 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2381 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2382 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2383 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2384 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2385 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2386 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2387 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2390 if (secy->replay_protect) {
2391 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2395 nla_nest_end(skb, secy_nest);
2399 nla_nest_cancel(skb, secy_nest);
2403 static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2404 struct sk_buff *skb, struct netlink_callback *cb)
2406 struct macsec_rx_sc *rx_sc;
2407 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2408 struct nlattr *txsa_list, *rxsc_list;
2411 struct nlattr *attr;
2413 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2414 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2418 genl_dump_check_consistent(cb, hdr, &macsec_fam);
2420 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2421 goto nla_put_failure;
2423 if (nla_put_secy(secy, skb))
2424 goto nla_put_failure;
2426 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2428 goto nla_put_failure;
2429 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2430 nla_nest_cancel(skb, attr);
2431 goto nla_put_failure;
2433 nla_nest_end(skb, attr);
2435 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2437 goto nla_put_failure;
2438 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2439 nla_nest_cancel(skb, attr);
2440 goto nla_put_failure;
2442 nla_nest_end(skb, attr);
2444 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2446 goto nla_put_failure;
2447 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2448 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2449 struct nlattr *txsa_nest;
2454 txsa_nest = nla_nest_start(skb, j++);
2456 nla_nest_cancel(skb, txsa_list);
2457 goto nla_put_failure;
2460 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2461 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2462 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2463 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2464 nla_nest_cancel(skb, txsa_nest);
2465 nla_nest_cancel(skb, txsa_list);
2466 goto nla_put_failure;
2469 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2471 nla_nest_cancel(skb, txsa_nest);
2472 nla_nest_cancel(skb, txsa_list);
2473 goto nla_put_failure;
2475 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2476 nla_nest_cancel(skb, attr);
2477 nla_nest_cancel(skb, txsa_nest);
2478 nla_nest_cancel(skb, txsa_list);
2479 goto nla_put_failure;
2481 nla_nest_end(skb, attr);
2483 nla_nest_end(skb, txsa_nest);
2485 nla_nest_end(skb, txsa_list);
2487 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2489 goto nla_put_failure;
2492 for_each_rxsc_rtnl(secy, rx_sc) {
2494 struct nlattr *rxsa_list;
2495 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2498 nla_nest_cancel(skb, rxsc_list);
2499 goto nla_put_failure;
2502 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2503 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2504 MACSEC_RXSC_ATTR_PAD)) {
2505 nla_nest_cancel(skb, rxsc_nest);
2506 nla_nest_cancel(skb, rxsc_list);
2507 goto nla_put_failure;
2510 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2512 nla_nest_cancel(skb, rxsc_nest);
2513 nla_nest_cancel(skb, rxsc_list);
2514 goto nla_put_failure;
2516 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2517 nla_nest_cancel(skb, attr);
2518 nla_nest_cancel(skb, rxsc_nest);
2519 nla_nest_cancel(skb, rxsc_list);
2520 goto nla_put_failure;
2522 nla_nest_end(skb, attr);
2524 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2526 nla_nest_cancel(skb, rxsc_nest);
2527 nla_nest_cancel(skb, rxsc_list);
2528 goto nla_put_failure;
2531 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2532 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2533 struct nlattr *rxsa_nest;
2538 rxsa_nest = nla_nest_start(skb, k++);
2540 nla_nest_cancel(skb, rxsa_list);
2541 nla_nest_cancel(skb, rxsc_nest);
2542 nla_nest_cancel(skb, rxsc_list);
2543 goto nla_put_failure;
2546 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2548 nla_nest_cancel(skb, rxsa_list);
2549 nla_nest_cancel(skb, rxsc_nest);
2550 nla_nest_cancel(skb, rxsc_list);
2551 goto nla_put_failure;
2553 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2554 nla_nest_cancel(skb, attr);
2555 nla_nest_cancel(skb, rxsa_list);
2556 nla_nest_cancel(skb, rxsc_nest);
2557 nla_nest_cancel(skb, rxsc_list);
2558 goto nla_put_failure;
2560 nla_nest_end(skb, attr);
2562 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2563 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2564 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2565 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2566 nla_nest_cancel(skb, rxsa_nest);
2567 nla_nest_cancel(skb, rxsc_nest);
2568 nla_nest_cancel(skb, rxsc_list);
2569 goto nla_put_failure;
2571 nla_nest_end(skb, rxsa_nest);
2574 nla_nest_end(skb, rxsa_list);
2575 nla_nest_end(skb, rxsc_nest);
2578 nla_nest_end(skb, rxsc_list);
2580 genlmsg_end(skb, hdr);
2585 genlmsg_cancel(skb, hdr);
2589 static int macsec_generation = 1; /* protected by RTNL */
2591 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2593 struct net *net = sock_net(skb->sk);
2594 struct net_device *dev;
2597 dev_idx = cb->args[0];
2602 cb->seq = macsec_generation;
2604 for_each_netdev(net, dev) {
2605 struct macsec_secy *secy;
2610 if (!netif_is_macsec(dev))
2613 secy = &macsec_priv(dev)->secy;
2614 if (dump_secy(secy, dev, skb, cb) < 0)
2626 static const struct genl_ops macsec_genl_ops[] = {
2628 .cmd = MACSEC_CMD_GET_TXSC,
2629 .dumpit = macsec_dump_txsc,
2630 .policy = macsec_genl_policy,
2633 .cmd = MACSEC_CMD_ADD_RXSC,
2634 .doit = macsec_add_rxsc,
2635 .policy = macsec_genl_policy,
2636 .flags = GENL_ADMIN_PERM,
2639 .cmd = MACSEC_CMD_DEL_RXSC,
2640 .doit = macsec_del_rxsc,
2641 .policy = macsec_genl_policy,
2642 .flags = GENL_ADMIN_PERM,
2645 .cmd = MACSEC_CMD_UPD_RXSC,
2646 .doit = macsec_upd_rxsc,
2647 .policy = macsec_genl_policy,
2648 .flags = GENL_ADMIN_PERM,
2651 .cmd = MACSEC_CMD_ADD_TXSA,
2652 .doit = macsec_add_txsa,
2653 .policy = macsec_genl_policy,
2654 .flags = GENL_ADMIN_PERM,
2657 .cmd = MACSEC_CMD_DEL_TXSA,
2658 .doit = macsec_del_txsa,
2659 .policy = macsec_genl_policy,
2660 .flags = GENL_ADMIN_PERM,
2663 .cmd = MACSEC_CMD_UPD_TXSA,
2664 .doit = macsec_upd_txsa,
2665 .policy = macsec_genl_policy,
2666 .flags = GENL_ADMIN_PERM,
2669 .cmd = MACSEC_CMD_ADD_RXSA,
2670 .doit = macsec_add_rxsa,
2671 .policy = macsec_genl_policy,
2672 .flags = GENL_ADMIN_PERM,
2675 .cmd = MACSEC_CMD_DEL_RXSA,
2676 .doit = macsec_del_rxsa,
2677 .policy = macsec_genl_policy,
2678 .flags = GENL_ADMIN_PERM,
2681 .cmd = MACSEC_CMD_UPD_RXSA,
2682 .doit = macsec_upd_rxsa,
2683 .policy = macsec_genl_policy,
2684 .flags = GENL_ADMIN_PERM,
2688 static struct genl_family macsec_fam __ro_after_init = {
2689 .name = MACSEC_GENL_NAME,
2691 .version = MACSEC_GENL_VERSION,
2692 .maxattr = MACSEC_ATTR_MAX,
2694 .module = THIS_MODULE,
2695 .ops = macsec_genl_ops,
2696 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2699 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2700 struct net_device *dev)
2702 struct macsec_dev *macsec = netdev_priv(dev);
2703 struct macsec_secy *secy = &macsec->secy;
2704 struct pcpu_secy_stats *secy_stats;
2708 if (!secy->protect_frames) {
2709 secy_stats = this_cpu_ptr(macsec->stats);
2710 u64_stats_update_begin(&secy_stats->syncp);
2711 secy_stats->stats.OutPktsUntagged++;
2712 u64_stats_update_end(&secy_stats->syncp);
2713 skb->dev = macsec->real_dev;
2715 ret = dev_queue_xmit(skb);
2716 count_tx(dev, ret, len);
2720 if (!secy->operational) {
2722 dev->stats.tx_dropped++;
2723 return NETDEV_TX_OK;
2726 skb = macsec_encrypt(skb, dev);
2728 if (PTR_ERR(skb) != -EINPROGRESS)
2729 dev->stats.tx_dropped++;
2730 return NETDEV_TX_OK;
2733 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2735 macsec_encrypt_finish(skb, dev);
2737 ret = dev_queue_xmit(skb);
2738 count_tx(dev, ret, len);
2742 #define MACSEC_FEATURES \
2743 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2744 static struct lock_class_key macsec_netdev_addr_lock_key;
2746 static int macsec_dev_init(struct net_device *dev)
2748 struct macsec_dev *macsec = macsec_priv(dev);
2749 struct net_device *real_dev = macsec->real_dev;
2752 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2756 err = gro_cells_init(&macsec->gro_cells, dev);
2758 free_percpu(dev->tstats);
2762 dev->features = real_dev->features & MACSEC_FEATURES;
2763 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2765 dev->needed_headroom = real_dev->needed_headroom +
2766 MACSEC_NEEDED_HEADROOM;
2767 dev->needed_tailroom = real_dev->needed_tailroom +
2768 MACSEC_NEEDED_TAILROOM;
2770 if (is_zero_ether_addr(dev->dev_addr))
2771 eth_hw_addr_inherit(dev, real_dev);
2772 if (is_zero_ether_addr(dev->broadcast))
2773 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2778 static void macsec_dev_uninit(struct net_device *dev)
2780 struct macsec_dev *macsec = macsec_priv(dev);
2782 gro_cells_destroy(&macsec->gro_cells);
2783 free_percpu(dev->tstats);
2786 static netdev_features_t macsec_fix_features(struct net_device *dev,
2787 netdev_features_t features)
2789 struct macsec_dev *macsec = macsec_priv(dev);
2790 struct net_device *real_dev = macsec->real_dev;
2792 features &= (real_dev->features & MACSEC_FEATURES) |
2793 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2794 features |= NETIF_F_LLTX;
2799 static int macsec_dev_open(struct net_device *dev)
2801 struct macsec_dev *macsec = macsec_priv(dev);
2802 struct net_device *real_dev = macsec->real_dev;
2805 err = dev_uc_add(real_dev, dev->dev_addr);
2809 if (dev->flags & IFF_ALLMULTI) {
2810 err = dev_set_allmulti(real_dev, 1);
2815 if (dev->flags & IFF_PROMISC) {
2816 err = dev_set_promiscuity(real_dev, 1);
2818 goto clear_allmulti;
2821 if (netif_carrier_ok(real_dev))
2822 netif_carrier_on(dev);
2826 if (dev->flags & IFF_ALLMULTI)
2827 dev_set_allmulti(real_dev, -1);
2829 dev_uc_del(real_dev, dev->dev_addr);
2830 netif_carrier_off(dev);
2834 static int macsec_dev_stop(struct net_device *dev)
2836 struct macsec_dev *macsec = macsec_priv(dev);
2837 struct net_device *real_dev = macsec->real_dev;
2839 netif_carrier_off(dev);
2841 dev_mc_unsync(real_dev, dev);
2842 dev_uc_unsync(real_dev, dev);
2844 if (dev->flags & IFF_ALLMULTI)
2845 dev_set_allmulti(real_dev, -1);
2847 if (dev->flags & IFF_PROMISC)
2848 dev_set_promiscuity(real_dev, -1);
2850 dev_uc_del(real_dev, dev->dev_addr);
2855 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2857 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2859 if (!(dev->flags & IFF_UP))
2862 if (change & IFF_ALLMULTI)
2863 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2865 if (change & IFF_PROMISC)
2866 dev_set_promiscuity(real_dev,
2867 dev->flags & IFF_PROMISC ? 1 : -1);
2870 static void macsec_dev_set_rx_mode(struct net_device *dev)
2872 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2874 dev_mc_sync(real_dev, dev);
2875 dev_uc_sync(real_dev, dev);
2878 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
2880 return make_sci(dev->dev_addr, port);
2883 static int macsec_set_mac_address(struct net_device *dev, void *p)
2885 struct macsec_dev *macsec = macsec_priv(dev);
2886 struct net_device *real_dev = macsec->real_dev;
2887 struct sockaddr *addr = p;
2890 if (!is_valid_ether_addr(addr->sa_data))
2891 return -EADDRNOTAVAIL;
2893 if (!(dev->flags & IFF_UP))
2896 err = dev_uc_add(real_dev, addr->sa_data);
2900 dev_uc_del(real_dev, dev->dev_addr);
2903 ether_addr_copy(dev->dev_addr, addr->sa_data);
2904 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
2908 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2910 struct macsec_dev *macsec = macsec_priv(dev);
2911 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2913 if (macsec->real_dev->mtu - extra < new_mtu)
2921 static void macsec_get_stats64(struct net_device *dev,
2922 struct rtnl_link_stats64 *s)
2929 for_each_possible_cpu(cpu) {
2930 struct pcpu_sw_netstats *stats;
2931 struct pcpu_sw_netstats tmp;
2934 stats = per_cpu_ptr(dev->tstats, cpu);
2936 start = u64_stats_fetch_begin_irq(&stats->syncp);
2937 tmp.rx_packets = stats->rx_packets;
2938 tmp.rx_bytes = stats->rx_bytes;
2939 tmp.tx_packets = stats->tx_packets;
2940 tmp.tx_bytes = stats->tx_bytes;
2941 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2943 s->rx_packets += tmp.rx_packets;
2944 s->rx_bytes += tmp.rx_bytes;
2945 s->tx_packets += tmp.tx_packets;
2946 s->tx_bytes += tmp.tx_bytes;
2949 s->rx_dropped = dev->stats.rx_dropped;
2950 s->tx_dropped = dev->stats.tx_dropped;
2953 static int macsec_get_iflink(const struct net_device *dev)
2955 return macsec_priv(dev)->real_dev->ifindex;
2959 static int macsec_get_nest_level(struct net_device *dev)
2961 return macsec_priv(dev)->nest_level;
2965 static const struct net_device_ops macsec_netdev_ops = {
2966 .ndo_init = macsec_dev_init,
2967 .ndo_uninit = macsec_dev_uninit,
2968 .ndo_open = macsec_dev_open,
2969 .ndo_stop = macsec_dev_stop,
2970 .ndo_fix_features = macsec_fix_features,
2971 .ndo_change_mtu = macsec_change_mtu,
2972 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2973 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2974 .ndo_set_mac_address = macsec_set_mac_address,
2975 .ndo_start_xmit = macsec_start_xmit,
2976 .ndo_get_stats64 = macsec_get_stats64,
2977 .ndo_get_iflink = macsec_get_iflink,
2978 .ndo_get_lock_subclass = macsec_get_nest_level,
2981 static const struct device_type macsec_type = {
2985 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2986 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2987 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
2988 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2989 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2990 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2991 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2992 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2993 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2994 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2995 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2996 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2997 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2998 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3001 static void macsec_free_netdev(struct net_device *dev)
3003 struct macsec_dev *macsec = macsec_priv(dev);
3005 free_percpu(macsec->stats);
3006 free_percpu(macsec->secy.tx_sc.stats);
3010 static void macsec_setup(struct net_device *dev)
3014 dev->max_mtu = ETH_MAX_MTU;
3015 dev->priv_flags |= IFF_NO_QUEUE;
3016 dev->netdev_ops = &macsec_netdev_ops;
3017 dev->needs_free_netdev = true;
3018 dev->priv_destructor = macsec_free_netdev;
3019 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3021 eth_zero_addr(dev->broadcast);
3024 static void macsec_changelink_common(struct net_device *dev,
3025 struct nlattr *data[])
3027 struct macsec_secy *secy;
3028 struct macsec_tx_sc *tx_sc;
3030 secy = &macsec_priv(dev)->secy;
3031 tx_sc = &secy->tx_sc;
3033 if (data[IFLA_MACSEC_ENCODING_SA]) {
3034 struct macsec_tx_sa *tx_sa;
3036 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3037 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3039 secy->operational = tx_sa && tx_sa->active;
3042 if (data[IFLA_MACSEC_WINDOW])
3043 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3045 if (data[IFLA_MACSEC_ENCRYPT])
3046 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3048 if (data[IFLA_MACSEC_PROTECT])
3049 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3051 if (data[IFLA_MACSEC_INC_SCI])
3052 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3054 if (data[IFLA_MACSEC_ES])
3055 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3057 if (data[IFLA_MACSEC_SCB])
3058 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3060 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3061 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3063 if (data[IFLA_MACSEC_VALIDATION])
3064 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3067 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3068 struct nlattr *data[],
3069 struct netlink_ext_ack *extack)
3074 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3075 data[IFLA_MACSEC_ICV_LEN] ||
3076 data[IFLA_MACSEC_SCI] ||
3077 data[IFLA_MACSEC_PORT])
3080 macsec_changelink_common(dev, data);
3085 static void macsec_del_dev(struct macsec_dev *macsec)
3089 while (macsec->secy.rx_sc) {
3090 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3092 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3096 for (i = 0; i < MACSEC_NUM_AN; i++) {
3097 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3100 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3106 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3108 struct macsec_dev *macsec = macsec_priv(dev);
3109 struct net_device *real_dev = macsec->real_dev;
3111 unregister_netdevice_queue(dev, head);
3112 list_del_rcu(&macsec->secys);
3113 macsec_del_dev(macsec);
3114 netdev_upper_dev_unlink(real_dev, dev);
3116 macsec_generation++;
3119 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3121 struct macsec_dev *macsec = macsec_priv(dev);
3122 struct net_device *real_dev = macsec->real_dev;
3123 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3125 macsec_common_dellink(dev, head);
3127 if (list_empty(&rxd->secys)) {
3128 netdev_rx_handler_unregister(real_dev);
3133 static int register_macsec_dev(struct net_device *real_dev,
3134 struct net_device *dev)
3136 struct macsec_dev *macsec = macsec_priv(dev);
3137 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3142 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3146 INIT_LIST_HEAD(&rxd->secys);
3148 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3156 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3160 static bool sci_exists(struct net_device *dev, sci_t sci)
3162 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3163 struct macsec_dev *macsec;
3165 list_for_each_entry(macsec, &rxd->secys, secys) {
3166 if (macsec->secy.sci == sci)
3173 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3175 struct macsec_dev *macsec = macsec_priv(dev);
3176 struct macsec_secy *secy = &macsec->secy;
3178 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3182 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3183 if (!secy->tx_sc.stats) {
3184 free_percpu(macsec->stats);
3188 if (sci == MACSEC_UNDEF_SCI)
3189 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3192 secy->operational = true;
3193 secy->key_len = DEFAULT_SAK_LEN;
3194 secy->icv_len = icv_len;
3195 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3196 secy->protect_frames = true;
3197 secy->replay_protect = false;
3200 secy->tx_sc.active = true;
3201 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3202 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3203 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3204 secy->tx_sc.end_station = false;
3205 secy->tx_sc.scb = false;
3210 static int macsec_newlink(struct net *net, struct net_device *dev,
3211 struct nlattr *tb[], struct nlattr *data[],
3212 struct netlink_ext_ack *extack)
3214 struct macsec_dev *macsec = macsec_priv(dev);
3215 rx_handler_func_t *rx_handler;
3216 u8 icv_len = DEFAULT_ICV_LEN;
3217 struct net_device *real_dev;
3223 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3226 if (real_dev->type != ARPHRD_ETHER)
3229 dev->priv_flags |= IFF_MACSEC;
3231 macsec->real_dev = real_dev;
3233 if (data && data[IFLA_MACSEC_ICV_LEN])
3234 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3235 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3241 rx_handler = rtnl_dereference(real_dev->rx_handler);
3242 if (rx_handler && rx_handler != macsec_handle_frame)
3245 err = register_netdevice(dev);
3249 macsec->nest_level = dev_get_nest_level(real_dev) + 1;
3250 netdev_lockdep_set_classes(dev);
3251 lockdep_set_class_and_subclass(&dev->addr_list_lock,
3252 &macsec_netdev_addr_lock_key,
3253 macsec_get_nest_level(dev));
3255 err = netdev_upper_dev_link(real_dev, dev);
3259 /* need to be already registered so that ->init has run and
3260 * the MAC addr is set
3262 if (data && data[IFLA_MACSEC_SCI])
3263 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3264 else if (data && data[IFLA_MACSEC_PORT])
3265 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3267 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3269 if (rx_handler && sci_exists(real_dev, sci)) {
3274 err = macsec_add_dev(dev, sci, icv_len);
3279 macsec_changelink_common(dev, data);
3281 err = register_macsec_dev(real_dev, dev);
3285 netif_stacked_transfer_operstate(real_dev, dev);
3286 linkwatch_fire_event(dev);
3288 macsec_generation++;
3293 macsec_del_dev(macsec);
3295 netdev_upper_dev_unlink(real_dev, dev);
3297 unregister_netdevice(dev);
3301 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
3302 struct netlink_ext_ack *extack)
3304 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3305 u8 icv_len = DEFAULT_ICV_LEN;
3312 if (data[IFLA_MACSEC_CIPHER_SUITE])
3313 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3315 if (data[IFLA_MACSEC_ICV_LEN]) {
3316 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3317 if (icv_len != DEFAULT_ICV_LEN) {
3318 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3319 struct crypto_aead *dummy_tfm;
3321 dummy_tfm = macsec_alloc_tfm(dummy_key,
3324 if (IS_ERR(dummy_tfm))
3325 return PTR_ERR(dummy_tfm);
3326 crypto_free_aead(dummy_tfm);
3331 case MACSEC_DEFAULT_CIPHER_ID:
3332 case MACSEC_DEFAULT_CIPHER_ALT:
3333 if (icv_len < MACSEC_MIN_ICV_LEN ||
3334 icv_len > MACSEC_STD_ICV_LEN)
3341 if (data[IFLA_MACSEC_ENCODING_SA]) {
3342 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3346 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3347 flag < IFLA_MACSEC_VALIDATION;
3350 if (nla_get_u8(data[flag]) > 1)
3355 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3356 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3357 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3359 if ((sci && (scb || es)) || (scb && es))
3362 if (data[IFLA_MACSEC_VALIDATION] &&
3363 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3366 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3367 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3368 !data[IFLA_MACSEC_WINDOW])
3374 static struct net *macsec_get_link_net(const struct net_device *dev)
3376 return dev_net(macsec_priv(dev)->real_dev);
3379 static size_t macsec_get_size(const struct net_device *dev)
3381 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3382 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3383 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3384 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3385 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3386 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3387 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3388 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3389 nla_total_size(1) + /* IFLA_MACSEC_ES */
3390 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3391 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3392 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
3396 static int macsec_fill_info(struct sk_buff *skb,
3397 const struct net_device *dev)
3399 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3400 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3402 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3404 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3405 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3406 MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) ||
3407 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3408 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3409 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3410 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3411 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3412 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3413 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3414 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3416 goto nla_put_failure;
3418 if (secy->replay_protect) {
3419 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3420 goto nla_put_failure;
3429 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3431 .priv_size = sizeof(struct macsec_dev),
3432 .maxtype = IFLA_MACSEC_MAX,
3433 .policy = macsec_rtnl_policy,
3434 .setup = macsec_setup,
3435 .validate = macsec_validate_attr,
3436 .newlink = macsec_newlink,
3437 .changelink = macsec_changelink,
3438 .dellink = macsec_dellink,
3439 .get_size = macsec_get_size,
3440 .fill_info = macsec_fill_info,
3441 .get_link_net = macsec_get_link_net,
3444 static bool is_macsec_master(struct net_device *dev)
3446 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3449 static int macsec_notify(struct notifier_block *this, unsigned long event,
3452 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3455 if (!is_macsec_master(real_dev))
3461 case NETDEV_CHANGE: {
3462 struct macsec_dev *m, *n;
3463 struct macsec_rxh_data *rxd;
3465 rxd = macsec_data_rtnl(real_dev);
3466 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3467 struct net_device *dev = m->secy.netdev;
3469 netif_stacked_transfer_operstate(real_dev, dev);
3473 case NETDEV_UNREGISTER: {
3474 struct macsec_dev *m, *n;
3475 struct macsec_rxh_data *rxd;
3477 rxd = macsec_data_rtnl(real_dev);
3478 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3479 macsec_common_dellink(m->secy.netdev, &head);
3482 netdev_rx_handler_unregister(real_dev);
3485 unregister_netdevice_many(&head);
3488 case NETDEV_CHANGEMTU: {
3489 struct macsec_dev *m;
3490 struct macsec_rxh_data *rxd;
3492 rxd = macsec_data_rtnl(real_dev);
3493 list_for_each_entry(m, &rxd->secys, secys) {
3494 struct net_device *dev = m->secy.netdev;
3495 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3496 macsec_extra_len(true));
3499 dev_set_mtu(dev, mtu);
3507 static struct notifier_block macsec_notifier = {
3508 .notifier_call = macsec_notify,
3511 static int __init macsec_init(void)
3515 pr_info("MACsec IEEE 802.1AE\n");
3516 err = register_netdevice_notifier(&macsec_notifier);
3520 err = rtnl_link_register(&macsec_link_ops);
3524 err = genl_register_family(&macsec_fam);
3531 rtnl_link_unregister(&macsec_link_ops);
3533 unregister_netdevice_notifier(&macsec_notifier);
3537 static void __exit macsec_exit(void)
3539 genl_unregister_family(&macsec_fam);
3540 rtnl_link_unregister(&macsec_link_ops);
3541 unregister_netdevice_notifier(&macsec_notifier);
3545 module_init(macsec_init);
3546 module_exit(macsec_exit);
3548 MODULE_ALIAS_RTNL_LINK("macsec");
3549 MODULE_ALIAS_GENL_FAMILY("macsec");
3551 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3552 MODULE_LICENSE("GPL v2");