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 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
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->active = false;
1348 atomic_set(&rx_sa->refcnt, 1);
1349 spin_lock_init(&rx_sa->lock);
1354 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1356 rx_sa->active = false;
1358 macsec_rxsa_put(rx_sa);
1361 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1365 for (i = 0; i < MACSEC_NUM_AN; i++) {
1366 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1368 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1373 macsec_rxsc_put(rx_sc);
1376 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1378 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1380 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1382 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1383 if (rx_sc->sci == sci) {
1386 rcu_assign_pointer(*rx_scp, rx_sc->next);
1394 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1396 struct macsec_rx_sc *rx_sc;
1397 struct macsec_dev *macsec;
1398 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1399 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1400 struct macsec_secy *secy;
1402 list_for_each_entry(macsec, &rxd->secys, secys) {
1403 if (find_rx_sc_rtnl(&macsec->secy, sci))
1404 return ERR_PTR(-EEXIST);
1407 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1409 return ERR_PTR(-ENOMEM);
1411 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1412 if (!rx_sc->stats) {
1414 return ERR_PTR(-ENOMEM);
1418 rx_sc->active = true;
1419 atomic_set(&rx_sc->refcnt, 1);
1421 secy = &macsec_priv(dev)->secy;
1422 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1423 rcu_assign_pointer(secy->rx_sc, rx_sc);
1431 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1434 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1438 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1439 if (IS_ERR(tx_sa->key.tfm)) {
1440 free_percpu(tx_sa->stats);
1441 return PTR_ERR(tx_sa->key.tfm);
1444 tx_sa->active = false;
1445 atomic_set(&tx_sa->refcnt, 1);
1446 spin_lock_init(&tx_sa->lock);
1451 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1453 tx_sa->active = false;
1455 macsec_txsa_put(tx_sa);
1458 static struct genl_family macsec_fam;
1460 static struct net_device *get_dev_from_nl(struct net *net,
1461 struct nlattr **attrs)
1463 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1464 struct net_device *dev;
1466 dev = __dev_get_by_index(net, ifindex);
1468 return ERR_PTR(-ENODEV);
1470 if (!netif_is_macsec(dev))
1471 return ERR_PTR(-ENODEV);
1476 static sci_t nla_get_sci(const struct nlattr *nla)
1478 return (__force sci_t)nla_get_u64(nla);
1481 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1484 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1487 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1488 struct nlattr **attrs,
1489 struct nlattr **tb_sa,
1490 struct net_device **devp,
1491 struct macsec_secy **secyp,
1492 struct macsec_tx_sc **scp,
1495 struct net_device *dev;
1496 struct macsec_secy *secy;
1497 struct macsec_tx_sc *tx_sc;
1498 struct macsec_tx_sa *tx_sa;
1500 if (!tb_sa[MACSEC_SA_ATTR_AN])
1501 return ERR_PTR(-EINVAL);
1503 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1505 dev = get_dev_from_nl(net, attrs);
1507 return ERR_CAST(dev);
1509 if (*assoc_num >= MACSEC_NUM_AN)
1510 return ERR_PTR(-EINVAL);
1512 secy = &macsec_priv(dev)->secy;
1513 tx_sc = &secy->tx_sc;
1515 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1517 return ERR_PTR(-ENODEV);
1525 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1526 struct nlattr **attrs,
1527 struct nlattr **tb_rxsc,
1528 struct net_device **devp,
1529 struct macsec_secy **secyp)
1531 struct net_device *dev;
1532 struct macsec_secy *secy;
1533 struct macsec_rx_sc *rx_sc;
1536 dev = get_dev_from_nl(net, attrs);
1538 return ERR_CAST(dev);
1540 secy = &macsec_priv(dev)->secy;
1542 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1543 return ERR_PTR(-EINVAL);
1545 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1546 rx_sc = find_rx_sc_rtnl(secy, sci);
1548 return ERR_PTR(-ENODEV);
1556 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1557 struct nlattr **attrs,
1558 struct nlattr **tb_rxsc,
1559 struct nlattr **tb_sa,
1560 struct net_device **devp,
1561 struct macsec_secy **secyp,
1562 struct macsec_rx_sc **scp,
1565 struct macsec_rx_sc *rx_sc;
1566 struct macsec_rx_sa *rx_sa;
1568 if (!tb_sa[MACSEC_SA_ATTR_AN])
1569 return ERR_PTR(-EINVAL);
1571 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1572 if (*assoc_num >= MACSEC_NUM_AN)
1573 return ERR_PTR(-EINVAL);
1575 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1577 return ERR_CAST(rx_sc);
1579 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1581 return ERR_PTR(-ENODEV);
1588 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1589 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1590 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1591 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1594 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1595 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1596 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1599 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1600 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1601 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1602 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1603 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1604 .len = MACSEC_KEYID_LEN, },
1605 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1606 .len = MACSEC_MAX_KEY_LEN, },
1609 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1611 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1614 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX,
1615 attrs[MACSEC_ATTR_SA_CONFIG],
1616 macsec_genl_sa_policy, NULL))
1622 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1624 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1627 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX,
1628 attrs[MACSEC_ATTR_RXSC_CONFIG],
1629 macsec_genl_rxsc_policy, NULL))
1635 static bool validate_add_rxsa(struct nlattr **attrs)
1637 if (!attrs[MACSEC_SA_ATTR_AN] ||
1638 !attrs[MACSEC_SA_ATTR_KEY] ||
1639 !attrs[MACSEC_SA_ATTR_KEYID])
1642 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1645 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1648 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1649 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1653 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1659 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1661 struct net_device *dev;
1662 struct nlattr **attrs = info->attrs;
1663 struct macsec_secy *secy;
1664 struct macsec_rx_sc *rx_sc;
1665 struct macsec_rx_sa *rx_sa;
1666 unsigned char assoc_num;
1667 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1668 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1671 if (!attrs[MACSEC_ATTR_IFINDEX])
1674 if (parse_sa_config(attrs, tb_sa))
1677 if (parse_rxsc_config(attrs, tb_rxsc))
1680 if (!validate_add_rxsa(tb_sa))
1684 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1685 if (IS_ERR(rx_sc)) {
1687 return PTR_ERR(rx_sc);
1690 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1692 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1693 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1694 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1699 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1705 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1711 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1712 secy->key_len, secy->icv_len);
1719 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1720 spin_lock_bh(&rx_sa->lock);
1721 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1722 spin_unlock_bh(&rx_sa->lock);
1725 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1726 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1728 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1730 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1737 static bool validate_add_rxsc(struct nlattr **attrs)
1739 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1742 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1743 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1750 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1752 struct net_device *dev;
1753 sci_t sci = MACSEC_UNDEF_SCI;
1754 struct nlattr **attrs = info->attrs;
1755 struct macsec_rx_sc *rx_sc;
1756 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1758 if (!attrs[MACSEC_ATTR_IFINDEX])
1761 if (parse_rxsc_config(attrs, tb_rxsc))
1764 if (!validate_add_rxsc(tb_rxsc))
1768 dev = get_dev_from_nl(genl_info_net(info), attrs);
1771 return PTR_ERR(dev);
1774 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1776 rx_sc = create_rx_sc(dev, sci);
1777 if (IS_ERR(rx_sc)) {
1779 return PTR_ERR(rx_sc);
1782 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1783 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1790 static bool validate_add_txsa(struct nlattr **attrs)
1792 if (!attrs[MACSEC_SA_ATTR_AN] ||
1793 !attrs[MACSEC_SA_ATTR_PN] ||
1794 !attrs[MACSEC_SA_ATTR_KEY] ||
1795 !attrs[MACSEC_SA_ATTR_KEYID])
1798 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1801 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1804 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1805 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1809 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1815 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1817 struct net_device *dev;
1818 struct nlattr **attrs = info->attrs;
1819 struct macsec_secy *secy;
1820 struct macsec_tx_sc *tx_sc;
1821 struct macsec_tx_sa *tx_sa;
1822 unsigned char assoc_num;
1823 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1826 if (!attrs[MACSEC_ATTR_IFINDEX])
1829 if (parse_sa_config(attrs, tb_sa))
1832 if (!validate_add_txsa(tb_sa))
1836 dev = get_dev_from_nl(genl_info_net(info), attrs);
1839 return PTR_ERR(dev);
1842 secy = &macsec_priv(dev)->secy;
1843 tx_sc = &secy->tx_sc;
1845 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1847 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1848 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1849 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1854 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1860 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1866 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1867 secy->key_len, secy->icv_len);
1874 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1876 spin_lock_bh(&tx_sa->lock);
1877 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1878 spin_unlock_bh(&tx_sa->lock);
1880 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1881 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1883 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1884 secy->operational = true;
1886 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1893 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1895 struct nlattr **attrs = info->attrs;
1896 struct net_device *dev;
1897 struct macsec_secy *secy;
1898 struct macsec_rx_sc *rx_sc;
1899 struct macsec_rx_sa *rx_sa;
1901 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1902 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1904 if (!attrs[MACSEC_ATTR_IFINDEX])
1907 if (parse_sa_config(attrs, tb_sa))
1910 if (parse_rxsc_config(attrs, tb_rxsc))
1914 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1915 &dev, &secy, &rx_sc, &assoc_num);
1916 if (IS_ERR(rx_sa)) {
1918 return PTR_ERR(rx_sa);
1921 if (rx_sa->active) {
1926 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1934 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1936 struct nlattr **attrs = info->attrs;
1937 struct net_device *dev;
1938 struct macsec_secy *secy;
1939 struct macsec_rx_sc *rx_sc;
1941 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1943 if (!attrs[MACSEC_ATTR_IFINDEX])
1946 if (parse_rxsc_config(attrs, tb_rxsc))
1949 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1953 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1956 return PTR_ERR(dev);
1959 secy = &macsec_priv(dev)->secy;
1960 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1962 rx_sc = del_rx_sc(secy, sci);
1974 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1976 struct nlattr **attrs = info->attrs;
1977 struct net_device *dev;
1978 struct macsec_secy *secy;
1979 struct macsec_tx_sc *tx_sc;
1980 struct macsec_tx_sa *tx_sa;
1982 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1984 if (!attrs[MACSEC_ATTR_IFINDEX])
1987 if (parse_sa_config(attrs, tb_sa))
1991 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1992 &dev, &secy, &tx_sc, &assoc_num);
1993 if (IS_ERR(tx_sa)) {
1995 return PTR_ERR(tx_sa);
1998 if (tx_sa->active) {
2003 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2011 static bool validate_upd_sa(struct nlattr **attrs)
2013 if (!attrs[MACSEC_SA_ATTR_AN] ||
2014 attrs[MACSEC_SA_ATTR_KEY] ||
2015 attrs[MACSEC_SA_ATTR_KEYID])
2018 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2021 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2024 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2025 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2032 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2034 struct nlattr **attrs = info->attrs;
2035 struct net_device *dev;
2036 struct macsec_secy *secy;
2037 struct macsec_tx_sc *tx_sc;
2038 struct macsec_tx_sa *tx_sa;
2040 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2042 if (!attrs[MACSEC_ATTR_IFINDEX])
2045 if (parse_sa_config(attrs, tb_sa))
2048 if (!validate_upd_sa(tb_sa))
2052 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2053 &dev, &secy, &tx_sc, &assoc_num);
2054 if (IS_ERR(tx_sa)) {
2056 return PTR_ERR(tx_sa);
2059 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2060 spin_lock_bh(&tx_sa->lock);
2061 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2062 spin_unlock_bh(&tx_sa->lock);
2065 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2066 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2068 if (assoc_num == tx_sc->encoding_sa)
2069 secy->operational = tx_sa->active;
2076 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2078 struct nlattr **attrs = info->attrs;
2079 struct net_device *dev;
2080 struct macsec_secy *secy;
2081 struct macsec_rx_sc *rx_sc;
2082 struct macsec_rx_sa *rx_sa;
2084 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2085 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2087 if (!attrs[MACSEC_ATTR_IFINDEX])
2090 if (parse_rxsc_config(attrs, tb_rxsc))
2093 if (parse_sa_config(attrs, tb_sa))
2096 if (!validate_upd_sa(tb_sa))
2100 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2101 &dev, &secy, &rx_sc, &assoc_num);
2102 if (IS_ERR(rx_sa)) {
2104 return PTR_ERR(rx_sa);
2107 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2108 spin_lock_bh(&rx_sa->lock);
2109 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2110 spin_unlock_bh(&rx_sa->lock);
2113 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2114 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2120 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2122 struct nlattr **attrs = info->attrs;
2123 struct net_device *dev;
2124 struct macsec_secy *secy;
2125 struct macsec_rx_sc *rx_sc;
2126 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2128 if (!attrs[MACSEC_ATTR_IFINDEX])
2131 if (parse_rxsc_config(attrs, tb_rxsc))
2134 if (!validate_add_rxsc(tb_rxsc))
2138 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2139 if (IS_ERR(rx_sc)) {
2141 return PTR_ERR(rx_sc);
2144 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2145 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2147 if (rx_sc->active != new)
2148 secy->n_rx_sc += new ? 1 : -1;
2150 rx_sc->active = new;
2158 static int copy_tx_sa_stats(struct sk_buff *skb,
2159 struct macsec_tx_sa_stats __percpu *pstats)
2161 struct macsec_tx_sa_stats sum = {0, };
2164 for_each_possible_cpu(cpu) {
2165 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2167 sum.OutPktsProtected += stats->OutPktsProtected;
2168 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2171 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2172 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2178 static int copy_rx_sa_stats(struct sk_buff *skb,
2179 struct macsec_rx_sa_stats __percpu *pstats)
2181 struct macsec_rx_sa_stats sum = {0, };
2184 for_each_possible_cpu(cpu) {
2185 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2187 sum.InPktsOK += stats->InPktsOK;
2188 sum.InPktsInvalid += stats->InPktsInvalid;
2189 sum.InPktsNotValid += stats->InPktsNotValid;
2190 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2191 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2194 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2195 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2196 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2197 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2198 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2204 static int copy_rx_sc_stats(struct sk_buff *skb,
2205 struct pcpu_rx_sc_stats __percpu *pstats)
2207 struct macsec_rx_sc_stats sum = {0, };
2210 for_each_possible_cpu(cpu) {
2211 const struct pcpu_rx_sc_stats *stats;
2212 struct macsec_rx_sc_stats tmp;
2215 stats = per_cpu_ptr(pstats, cpu);
2217 start = u64_stats_fetch_begin_irq(&stats->syncp);
2218 memcpy(&tmp, &stats->stats, sizeof(tmp));
2219 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2221 sum.InOctetsValidated += tmp.InOctetsValidated;
2222 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2223 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2224 sum.InPktsDelayed += tmp.InPktsDelayed;
2225 sum.InPktsOK += tmp.InPktsOK;
2226 sum.InPktsInvalid += tmp.InPktsInvalid;
2227 sum.InPktsLate += tmp.InPktsLate;
2228 sum.InPktsNotValid += tmp.InPktsNotValid;
2229 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2230 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2233 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2234 sum.InOctetsValidated,
2235 MACSEC_RXSC_STATS_ATTR_PAD) ||
2236 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2237 sum.InOctetsDecrypted,
2238 MACSEC_RXSC_STATS_ATTR_PAD) ||
2239 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2240 sum.InPktsUnchecked,
2241 MACSEC_RXSC_STATS_ATTR_PAD) ||
2242 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2244 MACSEC_RXSC_STATS_ATTR_PAD) ||
2245 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2247 MACSEC_RXSC_STATS_ATTR_PAD) ||
2248 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2250 MACSEC_RXSC_STATS_ATTR_PAD) ||
2251 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2253 MACSEC_RXSC_STATS_ATTR_PAD) ||
2254 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2256 MACSEC_RXSC_STATS_ATTR_PAD) ||
2257 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2258 sum.InPktsNotUsingSA,
2259 MACSEC_RXSC_STATS_ATTR_PAD) ||
2260 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2262 MACSEC_RXSC_STATS_ATTR_PAD))
2268 static int copy_tx_sc_stats(struct sk_buff *skb,
2269 struct pcpu_tx_sc_stats __percpu *pstats)
2271 struct macsec_tx_sc_stats sum = {0, };
2274 for_each_possible_cpu(cpu) {
2275 const struct pcpu_tx_sc_stats *stats;
2276 struct macsec_tx_sc_stats tmp;
2279 stats = per_cpu_ptr(pstats, cpu);
2281 start = u64_stats_fetch_begin_irq(&stats->syncp);
2282 memcpy(&tmp, &stats->stats, sizeof(tmp));
2283 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2285 sum.OutPktsProtected += tmp.OutPktsProtected;
2286 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2287 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2288 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2291 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2292 sum.OutPktsProtected,
2293 MACSEC_TXSC_STATS_ATTR_PAD) ||
2294 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2295 sum.OutPktsEncrypted,
2296 MACSEC_TXSC_STATS_ATTR_PAD) ||
2297 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2298 sum.OutOctetsProtected,
2299 MACSEC_TXSC_STATS_ATTR_PAD) ||
2300 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2301 sum.OutOctetsEncrypted,
2302 MACSEC_TXSC_STATS_ATTR_PAD))
2308 static int copy_secy_stats(struct sk_buff *skb,
2309 struct pcpu_secy_stats __percpu *pstats)
2311 struct macsec_dev_stats sum = {0, };
2314 for_each_possible_cpu(cpu) {
2315 const struct pcpu_secy_stats *stats;
2316 struct macsec_dev_stats tmp;
2319 stats = per_cpu_ptr(pstats, cpu);
2321 start = u64_stats_fetch_begin_irq(&stats->syncp);
2322 memcpy(&tmp, &stats->stats, sizeof(tmp));
2323 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2325 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2326 sum.InPktsUntagged += tmp.InPktsUntagged;
2327 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2328 sum.InPktsNoTag += tmp.InPktsNoTag;
2329 sum.InPktsBadTag += tmp.InPktsBadTag;
2330 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2331 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2332 sum.InPktsOverrun += tmp.InPktsOverrun;
2335 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2336 sum.OutPktsUntagged,
2337 MACSEC_SECY_STATS_ATTR_PAD) ||
2338 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2340 MACSEC_SECY_STATS_ATTR_PAD) ||
2341 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2343 MACSEC_SECY_STATS_ATTR_PAD) ||
2344 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2346 MACSEC_SECY_STATS_ATTR_PAD) ||
2347 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2349 MACSEC_SECY_STATS_ATTR_PAD) ||
2350 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2351 sum.InPktsUnknownSCI,
2352 MACSEC_SECY_STATS_ATTR_PAD) ||
2353 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2355 MACSEC_SECY_STATS_ATTR_PAD) ||
2356 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2358 MACSEC_SECY_STATS_ATTR_PAD))
2364 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2366 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2367 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2372 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2373 MACSEC_SECY_ATTR_PAD) ||
2374 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2375 MACSEC_DEFAULT_CIPHER_ID,
2376 MACSEC_SECY_ATTR_PAD) ||
2377 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2378 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2379 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2380 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2381 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2382 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2383 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2384 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2385 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2386 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2389 if (secy->replay_protect) {
2390 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2394 nla_nest_end(skb, secy_nest);
2398 nla_nest_cancel(skb, secy_nest);
2402 static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2403 struct sk_buff *skb, struct netlink_callback *cb)
2405 struct macsec_rx_sc *rx_sc;
2406 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2407 struct nlattr *txsa_list, *rxsc_list;
2410 struct nlattr *attr;
2412 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2413 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2417 genl_dump_check_consistent(cb, hdr, &macsec_fam);
2419 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2420 goto nla_put_failure;
2422 if (nla_put_secy(secy, skb))
2423 goto nla_put_failure;
2425 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2427 goto nla_put_failure;
2428 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2429 nla_nest_cancel(skb, attr);
2430 goto nla_put_failure;
2432 nla_nest_end(skb, attr);
2434 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2436 goto nla_put_failure;
2437 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2438 nla_nest_cancel(skb, attr);
2439 goto nla_put_failure;
2441 nla_nest_end(skb, attr);
2443 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2445 goto nla_put_failure;
2446 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2447 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2448 struct nlattr *txsa_nest;
2453 txsa_nest = nla_nest_start(skb, j++);
2455 nla_nest_cancel(skb, txsa_list);
2456 goto nla_put_failure;
2459 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2460 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2461 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2462 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2463 nla_nest_cancel(skb, txsa_nest);
2464 nla_nest_cancel(skb, txsa_list);
2465 goto nla_put_failure;
2468 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2470 nla_nest_cancel(skb, txsa_nest);
2471 nla_nest_cancel(skb, txsa_list);
2472 goto nla_put_failure;
2474 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2475 nla_nest_cancel(skb, attr);
2476 nla_nest_cancel(skb, txsa_nest);
2477 nla_nest_cancel(skb, txsa_list);
2478 goto nla_put_failure;
2480 nla_nest_end(skb, attr);
2482 nla_nest_end(skb, txsa_nest);
2484 nla_nest_end(skb, txsa_list);
2486 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2488 goto nla_put_failure;
2491 for_each_rxsc_rtnl(secy, rx_sc) {
2493 struct nlattr *rxsa_list;
2494 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2497 nla_nest_cancel(skb, rxsc_list);
2498 goto nla_put_failure;
2501 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2502 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2503 MACSEC_RXSC_ATTR_PAD)) {
2504 nla_nest_cancel(skb, rxsc_nest);
2505 nla_nest_cancel(skb, rxsc_list);
2506 goto nla_put_failure;
2509 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2511 nla_nest_cancel(skb, rxsc_nest);
2512 nla_nest_cancel(skb, rxsc_list);
2513 goto nla_put_failure;
2515 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2516 nla_nest_cancel(skb, attr);
2517 nla_nest_cancel(skb, rxsc_nest);
2518 nla_nest_cancel(skb, rxsc_list);
2519 goto nla_put_failure;
2521 nla_nest_end(skb, attr);
2523 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2525 nla_nest_cancel(skb, rxsc_nest);
2526 nla_nest_cancel(skb, rxsc_list);
2527 goto nla_put_failure;
2530 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2531 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2532 struct nlattr *rxsa_nest;
2537 rxsa_nest = nla_nest_start(skb, k++);
2539 nla_nest_cancel(skb, rxsa_list);
2540 nla_nest_cancel(skb, rxsc_nest);
2541 nla_nest_cancel(skb, rxsc_list);
2542 goto nla_put_failure;
2545 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2547 nla_nest_cancel(skb, rxsa_list);
2548 nla_nest_cancel(skb, rxsc_nest);
2549 nla_nest_cancel(skb, rxsc_list);
2550 goto nla_put_failure;
2552 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2553 nla_nest_cancel(skb, attr);
2554 nla_nest_cancel(skb, rxsa_list);
2555 nla_nest_cancel(skb, rxsc_nest);
2556 nla_nest_cancel(skb, rxsc_list);
2557 goto nla_put_failure;
2559 nla_nest_end(skb, attr);
2561 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2562 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2563 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2564 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2565 nla_nest_cancel(skb, rxsa_nest);
2566 nla_nest_cancel(skb, rxsc_nest);
2567 nla_nest_cancel(skb, rxsc_list);
2568 goto nla_put_failure;
2570 nla_nest_end(skb, rxsa_nest);
2573 nla_nest_end(skb, rxsa_list);
2574 nla_nest_end(skb, rxsc_nest);
2577 nla_nest_end(skb, rxsc_list);
2579 genlmsg_end(skb, hdr);
2584 genlmsg_cancel(skb, hdr);
2588 static int macsec_generation = 1; /* protected by RTNL */
2590 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2592 struct net *net = sock_net(skb->sk);
2593 struct net_device *dev;
2596 dev_idx = cb->args[0];
2601 cb->seq = macsec_generation;
2603 for_each_netdev(net, dev) {
2604 struct macsec_secy *secy;
2609 if (!netif_is_macsec(dev))
2612 secy = &macsec_priv(dev)->secy;
2613 if (dump_secy(secy, dev, skb, cb) < 0)
2625 static const struct genl_ops macsec_genl_ops[] = {
2627 .cmd = MACSEC_CMD_GET_TXSC,
2628 .dumpit = macsec_dump_txsc,
2629 .policy = macsec_genl_policy,
2632 .cmd = MACSEC_CMD_ADD_RXSC,
2633 .doit = macsec_add_rxsc,
2634 .policy = macsec_genl_policy,
2635 .flags = GENL_ADMIN_PERM,
2638 .cmd = MACSEC_CMD_DEL_RXSC,
2639 .doit = macsec_del_rxsc,
2640 .policy = macsec_genl_policy,
2641 .flags = GENL_ADMIN_PERM,
2644 .cmd = MACSEC_CMD_UPD_RXSC,
2645 .doit = macsec_upd_rxsc,
2646 .policy = macsec_genl_policy,
2647 .flags = GENL_ADMIN_PERM,
2650 .cmd = MACSEC_CMD_ADD_TXSA,
2651 .doit = macsec_add_txsa,
2652 .policy = macsec_genl_policy,
2653 .flags = GENL_ADMIN_PERM,
2656 .cmd = MACSEC_CMD_DEL_TXSA,
2657 .doit = macsec_del_txsa,
2658 .policy = macsec_genl_policy,
2659 .flags = GENL_ADMIN_PERM,
2662 .cmd = MACSEC_CMD_UPD_TXSA,
2663 .doit = macsec_upd_txsa,
2664 .policy = macsec_genl_policy,
2665 .flags = GENL_ADMIN_PERM,
2668 .cmd = MACSEC_CMD_ADD_RXSA,
2669 .doit = macsec_add_rxsa,
2670 .policy = macsec_genl_policy,
2671 .flags = GENL_ADMIN_PERM,
2674 .cmd = MACSEC_CMD_DEL_RXSA,
2675 .doit = macsec_del_rxsa,
2676 .policy = macsec_genl_policy,
2677 .flags = GENL_ADMIN_PERM,
2680 .cmd = MACSEC_CMD_UPD_RXSA,
2681 .doit = macsec_upd_rxsa,
2682 .policy = macsec_genl_policy,
2683 .flags = GENL_ADMIN_PERM,
2687 static struct genl_family macsec_fam __ro_after_init = {
2688 .name = MACSEC_GENL_NAME,
2690 .version = MACSEC_GENL_VERSION,
2691 .maxattr = MACSEC_ATTR_MAX,
2693 .module = THIS_MODULE,
2694 .ops = macsec_genl_ops,
2695 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2698 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2699 struct net_device *dev)
2701 struct macsec_dev *macsec = netdev_priv(dev);
2702 struct macsec_secy *secy = &macsec->secy;
2703 struct pcpu_secy_stats *secy_stats;
2707 if (!secy->protect_frames) {
2708 secy_stats = this_cpu_ptr(macsec->stats);
2709 u64_stats_update_begin(&secy_stats->syncp);
2710 secy_stats->stats.OutPktsUntagged++;
2711 u64_stats_update_end(&secy_stats->syncp);
2712 skb->dev = macsec->real_dev;
2714 ret = dev_queue_xmit(skb);
2715 count_tx(dev, ret, len);
2719 if (!secy->operational) {
2721 dev->stats.tx_dropped++;
2722 return NETDEV_TX_OK;
2725 skb = macsec_encrypt(skb, dev);
2727 if (PTR_ERR(skb) != -EINPROGRESS)
2728 dev->stats.tx_dropped++;
2729 return NETDEV_TX_OK;
2732 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2734 macsec_encrypt_finish(skb, dev);
2736 ret = dev_queue_xmit(skb);
2737 count_tx(dev, ret, len);
2741 #define MACSEC_FEATURES \
2742 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2743 static struct lock_class_key macsec_netdev_addr_lock_key;
2745 static int macsec_dev_init(struct net_device *dev)
2747 struct macsec_dev *macsec = macsec_priv(dev);
2748 struct net_device *real_dev = macsec->real_dev;
2751 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2755 err = gro_cells_init(&macsec->gro_cells, dev);
2757 free_percpu(dev->tstats);
2761 dev->features = real_dev->features & MACSEC_FEATURES;
2762 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2764 dev->needed_headroom = real_dev->needed_headroom +
2765 MACSEC_NEEDED_HEADROOM;
2766 dev->needed_tailroom = real_dev->needed_tailroom +
2767 MACSEC_NEEDED_TAILROOM;
2769 if (is_zero_ether_addr(dev->dev_addr))
2770 eth_hw_addr_inherit(dev, real_dev);
2771 if (is_zero_ether_addr(dev->broadcast))
2772 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2777 static void macsec_dev_uninit(struct net_device *dev)
2779 struct macsec_dev *macsec = macsec_priv(dev);
2781 gro_cells_destroy(&macsec->gro_cells);
2782 free_percpu(dev->tstats);
2785 static netdev_features_t macsec_fix_features(struct net_device *dev,
2786 netdev_features_t features)
2788 struct macsec_dev *macsec = macsec_priv(dev);
2789 struct net_device *real_dev = macsec->real_dev;
2791 features &= (real_dev->features & MACSEC_FEATURES) |
2792 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2793 features |= NETIF_F_LLTX;
2798 static int macsec_dev_open(struct net_device *dev)
2800 struct macsec_dev *macsec = macsec_priv(dev);
2801 struct net_device *real_dev = macsec->real_dev;
2804 err = dev_uc_add(real_dev, dev->dev_addr);
2808 if (dev->flags & IFF_ALLMULTI) {
2809 err = dev_set_allmulti(real_dev, 1);
2814 if (dev->flags & IFF_PROMISC) {
2815 err = dev_set_promiscuity(real_dev, 1);
2817 goto clear_allmulti;
2820 if (netif_carrier_ok(real_dev))
2821 netif_carrier_on(dev);
2825 if (dev->flags & IFF_ALLMULTI)
2826 dev_set_allmulti(real_dev, -1);
2828 dev_uc_del(real_dev, dev->dev_addr);
2829 netif_carrier_off(dev);
2833 static int macsec_dev_stop(struct net_device *dev)
2835 struct macsec_dev *macsec = macsec_priv(dev);
2836 struct net_device *real_dev = macsec->real_dev;
2838 netif_carrier_off(dev);
2840 dev_mc_unsync(real_dev, dev);
2841 dev_uc_unsync(real_dev, dev);
2843 if (dev->flags & IFF_ALLMULTI)
2844 dev_set_allmulti(real_dev, -1);
2846 if (dev->flags & IFF_PROMISC)
2847 dev_set_promiscuity(real_dev, -1);
2849 dev_uc_del(real_dev, dev->dev_addr);
2854 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2856 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2858 if (!(dev->flags & IFF_UP))
2861 if (change & IFF_ALLMULTI)
2862 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2864 if (change & IFF_PROMISC)
2865 dev_set_promiscuity(real_dev,
2866 dev->flags & IFF_PROMISC ? 1 : -1);
2869 static void macsec_dev_set_rx_mode(struct net_device *dev)
2871 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2873 dev_mc_sync(real_dev, dev);
2874 dev_uc_sync(real_dev, dev);
2877 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
2879 return make_sci(dev->dev_addr, port);
2882 static int macsec_set_mac_address(struct net_device *dev, void *p)
2884 struct macsec_dev *macsec = macsec_priv(dev);
2885 struct net_device *real_dev = macsec->real_dev;
2886 struct sockaddr *addr = p;
2889 if (!is_valid_ether_addr(addr->sa_data))
2890 return -EADDRNOTAVAIL;
2892 if (!(dev->flags & IFF_UP))
2895 err = dev_uc_add(real_dev, addr->sa_data);
2899 dev_uc_del(real_dev, dev->dev_addr);
2902 ether_addr_copy(dev->dev_addr, addr->sa_data);
2903 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
2907 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2909 struct macsec_dev *macsec = macsec_priv(dev);
2910 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2912 if (macsec->real_dev->mtu - extra < new_mtu)
2920 static void macsec_get_stats64(struct net_device *dev,
2921 struct rtnl_link_stats64 *s)
2928 for_each_possible_cpu(cpu) {
2929 struct pcpu_sw_netstats *stats;
2930 struct pcpu_sw_netstats tmp;
2933 stats = per_cpu_ptr(dev->tstats, cpu);
2935 start = u64_stats_fetch_begin_irq(&stats->syncp);
2936 tmp.rx_packets = stats->rx_packets;
2937 tmp.rx_bytes = stats->rx_bytes;
2938 tmp.tx_packets = stats->tx_packets;
2939 tmp.tx_bytes = stats->tx_bytes;
2940 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2942 s->rx_packets += tmp.rx_packets;
2943 s->rx_bytes += tmp.rx_bytes;
2944 s->tx_packets += tmp.tx_packets;
2945 s->tx_bytes += tmp.tx_bytes;
2948 s->rx_dropped = dev->stats.rx_dropped;
2949 s->tx_dropped = dev->stats.tx_dropped;
2952 static int macsec_get_iflink(const struct net_device *dev)
2954 return macsec_priv(dev)->real_dev->ifindex;
2958 static int macsec_get_nest_level(struct net_device *dev)
2960 return macsec_priv(dev)->nest_level;
2964 static const struct net_device_ops macsec_netdev_ops = {
2965 .ndo_init = macsec_dev_init,
2966 .ndo_uninit = macsec_dev_uninit,
2967 .ndo_open = macsec_dev_open,
2968 .ndo_stop = macsec_dev_stop,
2969 .ndo_fix_features = macsec_fix_features,
2970 .ndo_change_mtu = macsec_change_mtu,
2971 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2972 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2973 .ndo_set_mac_address = macsec_set_mac_address,
2974 .ndo_start_xmit = macsec_start_xmit,
2975 .ndo_get_stats64 = macsec_get_stats64,
2976 .ndo_get_iflink = macsec_get_iflink,
2977 .ndo_get_lock_subclass = macsec_get_nest_level,
2980 static const struct device_type macsec_type = {
2984 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2985 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2986 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
2987 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2988 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2989 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2990 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2991 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2992 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2993 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2994 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2995 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2996 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2997 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3000 static void macsec_free_netdev(struct net_device *dev)
3002 struct macsec_dev *macsec = macsec_priv(dev);
3004 free_percpu(macsec->stats);
3005 free_percpu(macsec->secy.tx_sc.stats);
3009 static void macsec_setup(struct net_device *dev)
3013 dev->max_mtu = ETH_MAX_MTU;
3014 dev->priv_flags |= IFF_NO_QUEUE;
3015 dev->netdev_ops = &macsec_netdev_ops;
3016 dev->needs_free_netdev = true;
3017 dev->priv_destructor = macsec_free_netdev;
3018 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3020 eth_zero_addr(dev->broadcast);
3023 static void macsec_changelink_common(struct net_device *dev,
3024 struct nlattr *data[])
3026 struct macsec_secy *secy;
3027 struct macsec_tx_sc *tx_sc;
3029 secy = &macsec_priv(dev)->secy;
3030 tx_sc = &secy->tx_sc;
3032 if (data[IFLA_MACSEC_ENCODING_SA]) {
3033 struct macsec_tx_sa *tx_sa;
3035 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3036 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3038 secy->operational = tx_sa && tx_sa->active;
3041 if (data[IFLA_MACSEC_WINDOW])
3042 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3044 if (data[IFLA_MACSEC_ENCRYPT])
3045 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3047 if (data[IFLA_MACSEC_PROTECT])
3048 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3050 if (data[IFLA_MACSEC_INC_SCI])
3051 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3053 if (data[IFLA_MACSEC_ES])
3054 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3056 if (data[IFLA_MACSEC_SCB])
3057 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3059 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3060 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3062 if (data[IFLA_MACSEC_VALIDATION])
3063 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3066 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3067 struct nlattr *data[],
3068 struct netlink_ext_ack *extack)
3073 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3074 data[IFLA_MACSEC_ICV_LEN] ||
3075 data[IFLA_MACSEC_SCI] ||
3076 data[IFLA_MACSEC_PORT])
3079 macsec_changelink_common(dev, data);
3084 static void macsec_del_dev(struct macsec_dev *macsec)
3088 while (macsec->secy.rx_sc) {
3089 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3091 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3095 for (i = 0; i < MACSEC_NUM_AN; i++) {
3096 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3099 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3105 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3107 struct macsec_dev *macsec = macsec_priv(dev);
3108 struct net_device *real_dev = macsec->real_dev;
3110 unregister_netdevice_queue(dev, head);
3111 list_del_rcu(&macsec->secys);
3112 macsec_del_dev(macsec);
3113 netdev_upper_dev_unlink(real_dev, dev);
3115 macsec_generation++;
3118 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3120 struct macsec_dev *macsec = macsec_priv(dev);
3121 struct net_device *real_dev = macsec->real_dev;
3122 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3124 macsec_common_dellink(dev, head);
3126 if (list_empty(&rxd->secys)) {
3127 netdev_rx_handler_unregister(real_dev);
3132 static int register_macsec_dev(struct net_device *real_dev,
3133 struct net_device *dev)
3135 struct macsec_dev *macsec = macsec_priv(dev);
3136 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3141 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3145 INIT_LIST_HEAD(&rxd->secys);
3147 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3155 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3159 static bool sci_exists(struct net_device *dev, sci_t sci)
3161 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3162 struct macsec_dev *macsec;
3164 list_for_each_entry(macsec, &rxd->secys, secys) {
3165 if (macsec->secy.sci == sci)
3172 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3174 struct macsec_dev *macsec = macsec_priv(dev);
3175 struct macsec_secy *secy = &macsec->secy;
3177 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3181 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3182 if (!secy->tx_sc.stats) {
3183 free_percpu(macsec->stats);
3187 if (sci == MACSEC_UNDEF_SCI)
3188 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3191 secy->operational = true;
3192 secy->key_len = DEFAULT_SAK_LEN;
3193 secy->icv_len = icv_len;
3194 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3195 secy->protect_frames = true;
3196 secy->replay_protect = false;
3199 secy->tx_sc.active = true;
3200 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3201 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3202 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3203 secy->tx_sc.end_station = false;
3204 secy->tx_sc.scb = false;
3209 static int macsec_newlink(struct net *net, struct net_device *dev,
3210 struct nlattr *tb[], struct nlattr *data[],
3211 struct netlink_ext_ack *extack)
3213 struct macsec_dev *macsec = macsec_priv(dev);
3214 rx_handler_func_t *rx_handler;
3215 u8 icv_len = DEFAULT_ICV_LEN;
3216 struct net_device *real_dev;
3222 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3225 if (real_dev->type != ARPHRD_ETHER)
3228 dev->priv_flags |= IFF_MACSEC;
3230 macsec->real_dev = real_dev;
3232 /* send_sci must be set to true when transmit sci explicitly is set */
3233 if ((data && data[IFLA_MACSEC_SCI]) &&
3234 (data && data[IFLA_MACSEC_INC_SCI])) {
3235 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3241 if (data && data[IFLA_MACSEC_ICV_LEN])
3242 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3243 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3249 rx_handler = rtnl_dereference(real_dev->rx_handler);
3250 if (rx_handler && rx_handler != macsec_handle_frame)
3253 err = register_netdevice(dev);
3257 macsec->nest_level = dev_get_nest_level(real_dev) + 1;
3258 netdev_lockdep_set_classes(dev);
3259 lockdep_set_class_and_subclass(&dev->addr_list_lock,
3260 &macsec_netdev_addr_lock_key,
3261 macsec_get_nest_level(dev));
3263 err = netdev_upper_dev_link(real_dev, dev);
3267 /* need to be already registered so that ->init has run and
3268 * the MAC addr is set
3270 if (data && data[IFLA_MACSEC_SCI])
3271 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3272 else if (data && data[IFLA_MACSEC_PORT])
3273 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3275 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3277 if (rx_handler && sci_exists(real_dev, sci)) {
3282 err = macsec_add_dev(dev, sci, icv_len);
3287 macsec_changelink_common(dev, data);
3289 err = register_macsec_dev(real_dev, dev);
3293 netif_stacked_transfer_operstate(real_dev, dev);
3294 linkwatch_fire_event(dev);
3296 macsec_generation++;
3301 macsec_del_dev(macsec);
3303 netdev_upper_dev_unlink(real_dev, dev);
3305 unregister_netdevice(dev);
3309 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
3310 struct netlink_ext_ack *extack)
3312 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3313 u8 icv_len = DEFAULT_ICV_LEN;
3320 if (data[IFLA_MACSEC_CIPHER_SUITE])
3321 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3323 if (data[IFLA_MACSEC_ICV_LEN]) {
3324 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3325 if (icv_len != DEFAULT_ICV_LEN) {
3326 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3327 struct crypto_aead *dummy_tfm;
3329 dummy_tfm = macsec_alloc_tfm(dummy_key,
3332 if (IS_ERR(dummy_tfm))
3333 return PTR_ERR(dummy_tfm);
3334 crypto_free_aead(dummy_tfm);
3339 case MACSEC_DEFAULT_CIPHER_ID:
3340 case MACSEC_DEFAULT_CIPHER_ALT:
3341 if (icv_len < MACSEC_MIN_ICV_LEN ||
3342 icv_len > MACSEC_STD_ICV_LEN)
3349 if (data[IFLA_MACSEC_ENCODING_SA]) {
3350 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3354 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3355 flag < IFLA_MACSEC_VALIDATION;
3358 if (nla_get_u8(data[flag]) > 1)
3363 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3364 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3365 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3367 if ((sci && (scb || es)) || (scb && es))
3370 if (data[IFLA_MACSEC_VALIDATION] &&
3371 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3374 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3375 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3376 !data[IFLA_MACSEC_WINDOW])
3382 static struct net *macsec_get_link_net(const struct net_device *dev)
3384 return dev_net(macsec_priv(dev)->real_dev);
3387 static size_t macsec_get_size(const struct net_device *dev)
3389 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3390 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3391 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3392 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3393 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3394 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3395 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3396 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3397 nla_total_size(1) + /* IFLA_MACSEC_ES */
3398 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3399 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3400 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
3404 static int macsec_fill_info(struct sk_buff *skb,
3405 const struct net_device *dev)
3407 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3408 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3410 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3412 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3413 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3414 MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) ||
3415 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3416 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3417 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3418 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3419 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3420 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3421 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3422 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3424 goto nla_put_failure;
3426 if (secy->replay_protect) {
3427 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3428 goto nla_put_failure;
3437 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3439 .priv_size = sizeof(struct macsec_dev),
3440 .maxtype = IFLA_MACSEC_MAX,
3441 .policy = macsec_rtnl_policy,
3442 .setup = macsec_setup,
3443 .validate = macsec_validate_attr,
3444 .newlink = macsec_newlink,
3445 .changelink = macsec_changelink,
3446 .dellink = macsec_dellink,
3447 .get_size = macsec_get_size,
3448 .fill_info = macsec_fill_info,
3449 .get_link_net = macsec_get_link_net,
3452 static bool is_macsec_master(struct net_device *dev)
3454 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3457 static int macsec_notify(struct notifier_block *this, unsigned long event,
3460 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3463 if (!is_macsec_master(real_dev))
3469 case NETDEV_CHANGE: {
3470 struct macsec_dev *m, *n;
3471 struct macsec_rxh_data *rxd;
3473 rxd = macsec_data_rtnl(real_dev);
3474 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3475 struct net_device *dev = m->secy.netdev;
3477 netif_stacked_transfer_operstate(real_dev, dev);
3481 case NETDEV_UNREGISTER: {
3482 struct macsec_dev *m, *n;
3483 struct macsec_rxh_data *rxd;
3485 rxd = macsec_data_rtnl(real_dev);
3486 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3487 macsec_common_dellink(m->secy.netdev, &head);
3490 netdev_rx_handler_unregister(real_dev);
3493 unregister_netdevice_many(&head);
3496 case NETDEV_CHANGEMTU: {
3497 struct macsec_dev *m;
3498 struct macsec_rxh_data *rxd;
3500 rxd = macsec_data_rtnl(real_dev);
3501 list_for_each_entry(m, &rxd->secys, secys) {
3502 struct net_device *dev = m->secy.netdev;
3503 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3504 macsec_extra_len(true));
3507 dev_set_mtu(dev, mtu);
3515 static struct notifier_block macsec_notifier = {
3516 .notifier_call = macsec_notify,
3519 static int __init macsec_init(void)
3523 pr_info("MACsec IEEE 802.1AE\n");
3524 err = register_netdevice_notifier(&macsec_notifier);
3528 err = rtnl_link_register(&macsec_link_ops);
3532 err = genl_register_family(&macsec_fam);
3539 rtnl_link_unregister(&macsec_link_ops);
3541 unregister_netdevice_notifier(&macsec_notifier);
3545 static void __exit macsec_exit(void)
3547 genl_unregister_family(&macsec_fam);
3548 rtnl_link_unregister(&macsec_link_ops);
3549 unregister_netdevice_notifier(&macsec_notifier);
3553 module_init(macsec_init);
3554 module_exit(macsec_exit);
3556 MODULE_ALIAS_RTNL_LINK("macsec");
3557 MODULE_ALIAS_GENL_FAMILY("macsec");
3559 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3560 MODULE_LICENSE("GPL v2");