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>
23 #include <uapi/linux/if_macsec.h>
25 typedef u64 __bitwise sci_t;
27 #define MACSEC_SCI_LEN 8
29 /* SecTAG length = macsec_eth_header without the optional SCI */
30 #define MACSEC_TAG_LEN 6
32 struct macsec_eth_header {
36 #if defined(__LITTLE_ENDIAN_BITFIELD)
39 #elif defined(__BIG_ENDIAN_BITFIELD)
43 #error "Please fix <asm/byteorder.h>"
46 u8 secure_channel_id[8]; /* optional */
49 #define MACSEC_TCI_VERSION 0x80
50 #define MACSEC_TCI_ES 0x40 /* end station */
51 #define MACSEC_TCI_SC 0x20 /* SCI present */
52 #define MACSEC_TCI_SCB 0x10 /* epon */
53 #define MACSEC_TCI_E 0x08 /* encryption */
54 #define MACSEC_TCI_C 0x04 /* changed text */
55 #define MACSEC_AN_MASK 0x03 /* association number */
56 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
58 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59 #define MIN_NON_SHORT_LEN 48
61 #define GCM_AES_IV_LEN 12
62 #define DEFAULT_ICV_LEN 16
64 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
66 #define for_each_rxsc(secy, sc) \
67 for (sc = rcu_dereference_bh(secy->rx_sc); \
69 sc = rcu_dereference_bh(sc->next))
70 #define for_each_rxsc_rtnl(secy, sc) \
71 for (sc = rtnl_dereference(secy->rx_sc); \
73 sc = rtnl_dereference(sc->next))
77 u8 secure_channel_id[8];
84 * struct macsec_key - SA key
85 * @id: user-provided key identifier
86 * @tfm: crypto struct, key storage
89 u8 id[MACSEC_KEYID_LEN];
90 struct crypto_aead *tfm;
93 struct macsec_rx_sc_stats {
94 __u64 InOctetsValidated;
95 __u64 InOctetsDecrypted;
96 __u64 InPktsUnchecked;
101 __u64 InPktsNotValid;
102 __u64 InPktsNotUsingSA;
103 __u64 InPktsUnusedSA;
106 struct macsec_rx_sa_stats {
109 __u32 InPktsNotValid;
110 __u32 InPktsNotUsingSA;
111 __u32 InPktsUnusedSA;
114 struct macsec_tx_sa_stats {
115 __u32 OutPktsProtected;
116 __u32 OutPktsEncrypted;
119 struct macsec_tx_sc_stats {
120 __u64 OutPktsProtected;
121 __u64 OutPktsEncrypted;
122 __u64 OutOctetsProtected;
123 __u64 OutOctetsEncrypted;
126 struct macsec_dev_stats {
127 __u64 OutPktsUntagged;
128 __u64 InPktsUntagged;
129 __u64 OutPktsTooLong;
132 __u64 InPktsUnknownSCI;
138 * struct macsec_rx_sa - receive secure association
140 * @next_pn: packet number expected for the next packet
141 * @lock: protects next_pn manipulations
142 * @key: key structure
143 * @stats: per-SA stats
145 struct macsec_rx_sa {
146 struct macsec_key key;
151 struct macsec_rx_sa_stats __percpu *stats;
152 struct macsec_rx_sc *sc;
156 struct pcpu_rx_sc_stats {
157 struct macsec_rx_sc_stats stats;
158 struct u64_stats_sync syncp;
162 * struct macsec_rx_sc - receive secure channel
163 * @sci: secure channel identifier for this SC
164 * @active: channel is active
165 * @sa: array of secure associations
166 * @stats: per-SC stats
168 struct macsec_rx_sc {
169 struct macsec_rx_sc __rcu *next;
172 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
173 struct pcpu_rx_sc_stats __percpu *stats;
175 struct rcu_head rcu_head;
179 * struct macsec_tx_sa - transmit secure association
181 * @next_pn: packet number to use for the next packet
182 * @lock: protects next_pn manipulations
183 * @key: key structure
184 * @stats: per-SA stats
186 struct macsec_tx_sa {
187 struct macsec_key key;
192 struct macsec_tx_sa_stats __percpu *stats;
196 struct pcpu_tx_sc_stats {
197 struct macsec_tx_sc_stats stats;
198 struct u64_stats_sync syncp;
202 * struct macsec_tx_sc - transmit secure channel
204 * @encoding_sa: association number of the SA currently in use
205 * @encrypt: encrypt packets on transmit, or authenticate only
206 * @send_sci: always include the SCI in the SecTAG
208 * @scb: single copy broadcast flag
209 * @sa: array of secure associations
210 * @stats: stats for this TXSC
212 struct macsec_tx_sc {
219 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
220 struct pcpu_tx_sc_stats __percpu *stats;
223 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
226 * struct macsec_secy - MACsec Security Entity
227 * @netdev: netdevice for this SecY
228 * @n_rx_sc: number of receive secure channels configured on this SecY
229 * @sci: secure channel identifier used for tx
230 * @key_len: length of keys used by the cipher suite
231 * @icv_len: length of ICV used by the cipher suite
232 * @validate_frames: validation mode
233 * @operational: MAC_Operational flag
234 * @protect_frames: enable protection for this SecY
235 * @replay_protect: enable packet number checks on receive
236 * @replay_window: size of the replay window
237 * @tx_sc: transmit secure channel
238 * @rx_sc: linked list of receive secure channels
241 struct net_device *netdev;
242 unsigned int n_rx_sc;
246 enum macsec_validation_type validate_frames;
251 struct macsec_tx_sc tx_sc;
252 struct macsec_rx_sc __rcu *rx_sc;
255 struct pcpu_secy_stats {
256 struct macsec_dev_stats stats;
257 struct u64_stats_sync syncp;
261 * struct macsec_dev - private data
263 * @real_dev: pointer to underlying netdevice
264 * @stats: MACsec device stats
265 * @secys: linked list of SecY's on the underlying device
268 struct macsec_secy secy;
269 struct net_device *real_dev;
270 struct pcpu_secy_stats __percpu *stats;
271 struct list_head secys;
272 struct gro_cells gro_cells;
273 unsigned int nest_level;
277 * struct macsec_rxh_data - rx_handler private argument
278 * @secys: linked list of SecY's on this underlying device
280 struct macsec_rxh_data {
281 struct list_head secys;
284 static struct macsec_dev *macsec_priv(const struct net_device *dev)
286 return (struct macsec_dev *)netdev_priv(dev);
289 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
291 return rcu_dereference_bh(dev->rx_handler_data);
294 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
296 return rtnl_dereference(dev->rx_handler_data);
300 struct aead_request *req;
302 struct macsec_tx_sa *tx_sa;
303 struct macsec_rx_sa *rx_sa;
310 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
312 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
314 if (!sa || !sa->active)
317 if (!atomic_inc_not_zero(&sa->refcnt))
323 static void free_rx_sc_rcu(struct rcu_head *head)
325 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
327 free_percpu(rx_sc->stats);
331 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
333 return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL;
336 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
338 if (atomic_dec_and_test(&sc->refcnt))
339 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
342 static void free_rxsa(struct rcu_head *head)
344 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
346 crypto_free_aead(sa->key.tfm);
347 free_percpu(sa->stats);
351 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
353 if (atomic_dec_and_test(&sa->refcnt))
354 call_rcu(&sa->rcu, free_rxsa);
357 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
359 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
361 if (!sa || !sa->active)
364 if (!atomic_inc_not_zero(&sa->refcnt))
370 static void free_txsa(struct rcu_head *head)
372 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
374 crypto_free_aead(sa->key.tfm);
375 free_percpu(sa->stats);
379 static void macsec_txsa_put(struct macsec_tx_sa *sa)
381 if (atomic_dec_and_test(&sa->refcnt))
382 call_rcu(&sa->rcu, free_txsa);
385 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
387 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
388 return (struct macsec_cb *)skb->cb;
391 #define MACSEC_PORT_ES (htons(0x0001))
392 #define MACSEC_PORT_SCB (0x0000)
393 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
395 #define DEFAULT_SAK_LEN 16
396 #define DEFAULT_SEND_SCI true
397 #define DEFAULT_ENCRYPT false
398 #define DEFAULT_ENCODING_SA 0
400 static sci_t make_sci(u8 *addr, __be16 port)
404 memcpy(&sci, addr, ETH_ALEN);
405 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
410 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
415 memcpy(&sci, hdr->secure_channel_id,
416 sizeof(hdr->secure_channel_id));
418 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
423 static unsigned int macsec_sectag_len(bool sci_present)
425 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
428 static unsigned int macsec_hdr_len(bool sci_present)
430 return macsec_sectag_len(sci_present) + ETH_HLEN;
433 static unsigned int macsec_extra_len(bool sci_present)
435 return macsec_sectag_len(sci_present) + sizeof(__be16);
438 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
439 static void macsec_fill_sectag(struct macsec_eth_header *h,
440 const struct macsec_secy *secy, u32 pn)
442 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
444 memset(&h->tci_an, 0, macsec_sectag_len(tx_sc->send_sci));
445 h->eth.h_proto = htons(ETH_P_MACSEC);
447 if (tx_sc->send_sci ||
448 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb)) {
449 h->tci_an |= MACSEC_TCI_SC;
450 memcpy(&h->secure_channel_id, &secy->sci,
451 sizeof(h->secure_channel_id));
453 if (tx_sc->end_station)
454 h->tci_an |= MACSEC_TCI_ES;
456 h->tci_an |= MACSEC_TCI_SCB;
459 h->packet_number = htonl(pn);
461 /* with GCM, C/E clear for !encrypt, both set for encrypt */
463 h->tci_an |= MACSEC_TCI_CONFID;
464 else if (secy->icv_len != DEFAULT_ICV_LEN)
465 h->tci_an |= MACSEC_TCI_C;
467 h->tci_an |= tx_sc->encoding_sa;
470 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
472 if (data_len < MIN_NON_SHORT_LEN)
473 h->short_length = data_len;
476 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
477 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
479 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
480 int len = skb->len - 2 * ETH_ALEN;
481 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
483 /* a) It comprises at least 17 octets */
487 /* b) MACsec EtherType: already checked */
489 /* c) V bit is clear */
490 if (h->tci_an & MACSEC_TCI_VERSION)
493 /* d) ES or SCB => !SC */
494 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
495 (h->tci_an & MACSEC_TCI_SC))
498 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
502 /* rx.pn != 0 (figure 10-5) */
503 if (!h->packet_number)
506 /* length check, f) g) h) i) */
508 return len == extra_len + h->short_length;
509 return len >= extra_len + MIN_NON_SHORT_LEN;
512 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
513 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
515 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
517 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
520 gcm_iv->pn = htonl(pn);
523 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
525 return (struct macsec_eth_header *)skb_mac_header(skb);
528 static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
532 spin_lock_bh(&tx_sa->lock);
536 if (tx_sa->next_pn == 0) {
537 pr_debug("PN wrapped, transitioning to !oper\n");
538 tx_sa->active = false;
539 if (secy->protect_frames)
540 secy->operational = false;
542 spin_unlock_bh(&tx_sa->lock);
547 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
549 struct macsec_dev *macsec = netdev_priv(dev);
551 skb->dev = macsec->real_dev;
552 skb_reset_mac_header(skb);
553 skb->protocol = eth_hdr(skb)->h_proto;
556 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
557 struct macsec_tx_sa *tx_sa)
559 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
561 u64_stats_update_begin(&txsc_stats->syncp);
562 if (tx_sc->encrypt) {
563 txsc_stats->stats.OutOctetsEncrypted += skb->len;
564 txsc_stats->stats.OutPktsEncrypted++;
565 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
567 txsc_stats->stats.OutOctetsProtected += skb->len;
568 txsc_stats->stats.OutPktsProtected++;
569 this_cpu_inc(tx_sa->stats->OutPktsProtected);
571 u64_stats_update_end(&txsc_stats->syncp);
574 static void count_tx(struct net_device *dev, int ret, int len)
576 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
577 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
579 u64_stats_update_begin(&stats->syncp);
581 stats->tx_bytes += len;
582 u64_stats_update_end(&stats->syncp);
584 dev->stats.tx_dropped++;
588 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
590 struct sk_buff *skb = base->data;
591 struct net_device *dev = skb->dev;
592 struct macsec_dev *macsec = macsec_priv(dev);
593 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
596 aead_request_free(macsec_skb_cb(skb)->req);
599 macsec_encrypt_finish(skb, dev);
600 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
602 ret = dev_queue_xmit(skb);
603 count_tx(dev, ret, len);
604 rcu_read_unlock_bh();
610 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
612 struct scatterlist **sg)
614 size_t size, iv_offset, sg_offset;
615 struct aead_request *req;
618 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
620 size += GCM_AES_IV_LEN;
622 size = ALIGN(size, __alignof__(struct scatterlist));
624 size += sizeof(struct scatterlist) * (MAX_SKB_FRAGS + 1);
626 tmp = kmalloc(size, GFP_ATOMIC);
630 *iv = (unsigned char *)(tmp + iv_offset);
631 *sg = (struct scatterlist *)(tmp + sg_offset);
634 aead_request_set_tfm(req, tfm);
639 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
640 struct net_device *dev)
643 struct scatterlist *sg;
646 struct macsec_eth_header *hh;
647 size_t unprotected_len;
648 struct aead_request *req;
649 struct macsec_secy *secy;
650 struct macsec_tx_sc *tx_sc;
651 struct macsec_tx_sa *tx_sa;
652 struct macsec_dev *macsec = macsec_priv(dev);
655 secy = &macsec->secy;
656 tx_sc = &secy->tx_sc;
658 /* 10.5.1 TX SA assignment */
659 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
661 secy->operational = false;
663 return ERR_PTR(-EINVAL);
666 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
667 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
668 struct sk_buff *nskb = skb_copy_expand(skb,
669 MACSEC_NEEDED_HEADROOM,
670 MACSEC_NEEDED_TAILROOM,
676 macsec_txsa_put(tx_sa);
678 return ERR_PTR(-ENOMEM);
681 skb = skb_unshare(skb, GFP_ATOMIC);
683 macsec_txsa_put(tx_sa);
684 return ERR_PTR(-ENOMEM);
688 unprotected_len = skb->len;
690 hh = (struct macsec_eth_header *)skb_push(skb, macsec_extra_len(tx_sc->send_sci));
691 memmove(hh, eth, 2 * ETH_ALEN);
693 pn = tx_sa_update_pn(tx_sa, secy);
695 macsec_txsa_put(tx_sa);
697 return ERR_PTR(-ENOLINK);
699 macsec_fill_sectag(hh, secy, pn);
700 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
702 skb_put(skb, secy->icv_len);
704 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
705 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
707 u64_stats_update_begin(&secy_stats->syncp);
708 secy_stats->stats.OutPktsTooLong++;
709 u64_stats_update_end(&secy_stats->syncp);
711 macsec_txsa_put(tx_sa);
713 return ERR_PTR(-EINVAL);
716 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg);
718 macsec_txsa_put(tx_sa);
720 return ERR_PTR(-ENOMEM);
723 macsec_fill_iv(iv, secy->sci, pn);
725 sg_init_table(sg, MAX_SKB_FRAGS + 1);
726 skb_to_sgvec(skb, sg, 0, skb->len);
728 if (tx_sc->encrypt) {
729 int len = skb->len - macsec_hdr_len(tx_sc->send_sci) -
731 aead_request_set_crypt(req, sg, sg, len, iv);
732 aead_request_set_ad(req, macsec_hdr_len(tx_sc->send_sci));
734 aead_request_set_crypt(req, sg, sg, 0, iv);
735 aead_request_set_ad(req, skb->len - secy->icv_len);
738 macsec_skb_cb(skb)->req = req;
739 macsec_skb_cb(skb)->tx_sa = tx_sa;
740 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
743 ret = crypto_aead_encrypt(req);
744 if (ret == -EINPROGRESS) {
746 } else if (ret != 0) {
749 aead_request_free(req);
750 macsec_txsa_put(tx_sa);
751 return ERR_PTR(-EINVAL);
755 aead_request_free(req);
756 macsec_txsa_put(tx_sa);
761 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
763 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
764 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
765 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
768 spin_lock(&rx_sa->lock);
769 if (rx_sa->next_pn >= secy->replay_window)
770 lowest_pn = rx_sa->next_pn - secy->replay_window;
772 /* Now perform replay protection check again
773 * (see IEEE 802.1AE-2006 figure 10-5)
775 if (secy->replay_protect && pn < lowest_pn) {
776 spin_unlock(&rx_sa->lock);
777 u64_stats_update_begin(&rxsc_stats->syncp);
778 rxsc_stats->stats.InPktsLate++;
779 u64_stats_update_end(&rxsc_stats->syncp);
783 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
784 u64_stats_update_begin(&rxsc_stats->syncp);
785 if (hdr->tci_an & MACSEC_TCI_E)
786 rxsc_stats->stats.InOctetsDecrypted += skb->len;
788 rxsc_stats->stats.InOctetsValidated += skb->len;
789 u64_stats_update_end(&rxsc_stats->syncp);
792 if (!macsec_skb_cb(skb)->valid) {
793 spin_unlock(&rx_sa->lock);
796 if (hdr->tci_an & MACSEC_TCI_C ||
797 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
798 u64_stats_update_begin(&rxsc_stats->syncp);
799 rxsc_stats->stats.InPktsNotValid++;
800 u64_stats_update_end(&rxsc_stats->syncp);
804 u64_stats_update_begin(&rxsc_stats->syncp);
805 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
806 rxsc_stats->stats.InPktsInvalid++;
807 this_cpu_inc(rx_sa->stats->InPktsInvalid);
808 } else if (pn < lowest_pn) {
809 rxsc_stats->stats.InPktsDelayed++;
811 rxsc_stats->stats.InPktsUnchecked++;
813 u64_stats_update_end(&rxsc_stats->syncp);
815 u64_stats_update_begin(&rxsc_stats->syncp);
816 if (pn < lowest_pn) {
817 rxsc_stats->stats.InPktsDelayed++;
819 rxsc_stats->stats.InPktsOK++;
820 this_cpu_inc(rx_sa->stats->InPktsOK);
822 u64_stats_update_end(&rxsc_stats->syncp);
824 if (pn >= rx_sa->next_pn)
825 rx_sa->next_pn = pn + 1;
826 spin_unlock(&rx_sa->lock);
832 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
834 skb->pkt_type = PACKET_HOST;
835 skb->protocol = eth_type_trans(skb, dev);
837 skb_reset_network_header(skb);
838 if (!skb_transport_header_was_set(skb))
839 skb_reset_transport_header(skb);
840 skb_reset_mac_len(skb);
843 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
845 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
846 skb_pull(skb, hdr_len);
847 pskb_trim_unique(skb, skb->len - icv_len);
850 static void count_rx(struct net_device *dev, int len)
852 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
854 u64_stats_update_begin(&stats->syncp);
856 stats->rx_bytes += len;
857 u64_stats_update_end(&stats->syncp);
860 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
862 struct sk_buff *skb = base->data;
863 struct net_device *dev = skb->dev;
864 struct macsec_dev *macsec = macsec_priv(dev);
865 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
866 struct macsec_rx_sc *rx_sc = rx_sa->sc;
870 aead_request_free(macsec_skb_cb(skb)->req);
873 pn = ntohl(macsec_ethhdr(skb)->packet_number);
874 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
875 rcu_read_unlock_bh();
880 macsec_finalize_skb(skb, macsec->secy.icv_len,
881 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
882 macsec_reset_skb(skb, macsec->secy.netdev);
885 ret = gro_cells_receive(&macsec->gro_cells, skb);
886 if (ret == NET_RX_SUCCESS)
889 macsec->secy.netdev->stats.rx_dropped++;
891 rcu_read_unlock_bh();
894 macsec_rxsa_put(rx_sa);
895 macsec_rxsc_put(rx_sc);
899 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
900 struct net_device *dev,
901 struct macsec_rx_sa *rx_sa,
903 struct macsec_secy *secy)
906 struct scatterlist *sg;
908 struct aead_request *req;
909 struct macsec_eth_header *hdr;
910 u16 icv_len = secy->icv_len;
912 macsec_skb_cb(skb)->valid = false;
913 skb = skb_share_check(skb, GFP_ATOMIC);
915 return ERR_PTR(-ENOMEM);
917 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg);
920 return ERR_PTR(-ENOMEM);
923 hdr = (struct macsec_eth_header *)skb->data;
924 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
926 sg_init_table(sg, MAX_SKB_FRAGS + 1);
927 skb_to_sgvec(skb, sg, 0, skb->len);
929 if (hdr->tci_an & MACSEC_TCI_E) {
930 /* confidentiality: ethernet + macsec header
931 * authenticated, encrypted payload
933 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
935 aead_request_set_crypt(req, sg, sg, len, iv);
936 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
937 skb = skb_unshare(skb, GFP_ATOMIC);
939 aead_request_free(req);
940 return ERR_PTR(-ENOMEM);
943 /* integrity only: all headers + data authenticated */
944 aead_request_set_crypt(req, sg, sg, icv_len, iv);
945 aead_request_set_ad(req, skb->len - icv_len);
948 macsec_skb_cb(skb)->req = req;
950 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
953 ret = crypto_aead_decrypt(req);
954 if (ret == -EINPROGRESS) {
956 } else if (ret != 0) {
957 /* decryption/authentication failed
958 * 10.6 if validateFrames is disabled, deliver anyway
960 if (ret != -EBADMSG) {
965 macsec_skb_cb(skb)->valid = true;
969 aead_request_free(req);
974 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
976 struct macsec_rx_sc *rx_sc;
978 for_each_rxsc(secy, rx_sc) {
979 if (rx_sc->sci == sci)
986 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
988 struct macsec_rx_sc *rx_sc;
990 for_each_rxsc_rtnl(secy, rx_sc) {
991 if (rx_sc->sci == sci)
998 static void handle_not_macsec(struct sk_buff *skb)
1000 struct macsec_rxh_data *rxd;
1001 struct macsec_dev *macsec;
1004 rxd = macsec_data_rcu(skb->dev);
1006 /* 10.6 If the management control validateFrames is not
1007 * Strict, frames without a SecTAG are received, counted, and
1008 * delivered to the Controlled Port
1010 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1011 struct sk_buff *nskb;
1013 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1015 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1016 u64_stats_update_begin(&secy_stats->syncp);
1017 secy_stats->stats.InPktsNoTag++;
1018 u64_stats_update_end(&secy_stats->syncp);
1022 /* deliver on this port */
1023 nskb = skb_clone(skb, GFP_ATOMIC);
1027 nskb->dev = macsec->secy.netdev;
1029 ret = netif_rx(nskb);
1030 if (ret == NET_RX_SUCCESS) {
1031 u64_stats_update_begin(&secy_stats->syncp);
1032 secy_stats->stats.InPktsUntagged++;
1033 u64_stats_update_end(&secy_stats->syncp);
1035 macsec->secy.netdev->stats.rx_dropped++;
1042 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1044 struct sk_buff *skb = *pskb;
1045 struct net_device *dev = skb->dev;
1046 struct macsec_eth_header *hdr;
1047 struct macsec_secy *secy = NULL;
1048 struct macsec_rx_sc *rx_sc;
1049 struct macsec_rx_sa *rx_sa;
1050 struct macsec_rxh_data *rxd;
1051 struct macsec_dev *macsec;
1055 struct pcpu_rx_sc_stats *rxsc_stats;
1056 struct pcpu_secy_stats *secy_stats;
1060 if (skb_headroom(skb) < ETH_HLEN)
1063 hdr = macsec_ethhdr(skb);
1064 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1065 handle_not_macsec(skb);
1067 /* and deliver to the uncontrolled port */
1068 return RX_HANDLER_PASS;
1071 skb = skb_unshare(skb, GFP_ATOMIC);
1074 return RX_HANDLER_CONSUMED;
1077 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1079 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1083 hdr = macsec_ethhdr(skb);
1085 /* Frames with a SecTAG that has the TCI E bit set but the C
1086 * bit clear are discarded, as this reserved encoding is used
1087 * to identify frames with a SecTAG that are not to be
1088 * delivered to the Controlled Port.
1090 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1091 return RX_HANDLER_PASS;
1093 /* now, pull the extra length */
1094 if (hdr->tci_an & MACSEC_TCI_SC) {
1099 /* ethernet header is part of crypto processing */
1100 skb_push(skb, ETH_HLEN);
1102 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1103 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1104 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1107 rxd = macsec_data_rcu(skb->dev);
1109 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1110 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1111 sc = sc ? macsec_rxsc_get(sc) : NULL;
1114 secy = &macsec->secy;
1124 macsec = macsec_priv(dev);
1125 secy_stats = this_cpu_ptr(macsec->stats);
1126 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1128 if (!macsec_validate_skb(skb, secy->icv_len)) {
1129 u64_stats_update_begin(&secy_stats->syncp);
1130 secy_stats->stats.InPktsBadTag++;
1131 u64_stats_update_end(&secy_stats->syncp);
1135 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1137 /* 10.6.1 if the SA is not in use */
1139 /* If validateFrames is Strict or the C bit in the
1140 * SecTAG is set, discard
1142 if (hdr->tci_an & MACSEC_TCI_C ||
1143 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1144 u64_stats_update_begin(&rxsc_stats->syncp);
1145 rxsc_stats->stats.InPktsNotUsingSA++;
1146 u64_stats_update_end(&rxsc_stats->syncp);
1150 /* not Strict, the frame (with the SecTAG and ICV
1151 * removed) is delivered to the Controlled Port.
1153 u64_stats_update_begin(&rxsc_stats->syncp);
1154 rxsc_stats->stats.InPktsUnusedSA++;
1155 u64_stats_update_end(&rxsc_stats->syncp);
1159 /* First, PN check to avoid decrypting obviously wrong packets */
1160 pn = ntohl(hdr->packet_number);
1161 if (secy->replay_protect) {
1164 spin_lock(&rx_sa->lock);
1165 late = rx_sa->next_pn >= secy->replay_window &&
1166 pn < (rx_sa->next_pn - secy->replay_window);
1167 spin_unlock(&rx_sa->lock);
1170 u64_stats_update_begin(&rxsc_stats->syncp);
1171 rxsc_stats->stats.InPktsLate++;
1172 u64_stats_update_end(&rxsc_stats->syncp);
1177 macsec_skb_cb(skb)->rx_sa = rx_sa;
1179 /* Disabled && !changed text => skip validation */
1180 if (hdr->tci_an & MACSEC_TCI_C ||
1181 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1182 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1185 /* the decrypt callback needs the reference */
1186 if (PTR_ERR(skb) != -EINPROGRESS) {
1187 macsec_rxsa_put(rx_sa);
1188 macsec_rxsc_put(rx_sc);
1192 return RX_HANDLER_CONSUMED;
1195 if (!macsec_post_decrypt(skb, secy, pn))
1199 macsec_finalize_skb(skb, secy->icv_len,
1200 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1201 macsec_reset_skb(skb, secy->netdev);
1204 macsec_rxsa_put(rx_sa);
1205 macsec_rxsc_put(rx_sc);
1207 ret = gro_cells_receive(&macsec->gro_cells, skb);
1208 if (ret == NET_RX_SUCCESS)
1209 count_rx(dev, skb->len);
1211 macsec->secy.netdev->stats.rx_dropped++;
1216 return RX_HANDLER_CONSUMED;
1219 macsec_rxsa_put(rx_sa);
1221 macsec_rxsc_put(rx_sc);
1226 return RX_HANDLER_CONSUMED;
1229 /* 10.6.1 if the SC is not found */
1230 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1232 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1233 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1235 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1236 struct sk_buff *nskb;
1238 secy_stats = this_cpu_ptr(macsec->stats);
1240 /* If validateFrames is Strict or the C bit in the
1241 * SecTAG is set, discard
1244 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1245 u64_stats_update_begin(&secy_stats->syncp);
1246 secy_stats->stats.InPktsNoSCI++;
1247 u64_stats_update_end(&secy_stats->syncp);
1251 /* not strict, the frame (with the SecTAG and ICV
1252 * removed) is delivered to the Controlled Port.
1254 nskb = skb_clone(skb, GFP_ATOMIC);
1258 macsec_reset_skb(nskb, macsec->secy.netdev);
1260 ret = netif_rx(nskb);
1261 if (ret == NET_RX_SUCCESS) {
1262 u64_stats_update_begin(&secy_stats->syncp);
1263 secy_stats->stats.InPktsUnknownSCI++;
1264 u64_stats_update_end(&secy_stats->syncp);
1266 macsec->secy.netdev->stats.rx_dropped++;
1272 return RX_HANDLER_PASS;
1275 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1277 struct crypto_aead *tfm;
1280 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1285 ret = crypto_aead_setkey(tfm, key, key_len);
1289 ret = crypto_aead_setauthsize(tfm, icv_len);
1295 crypto_free_aead(tfm);
1296 return ERR_PTR(ret);
1299 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1302 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1306 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1307 if (IS_ERR(rx_sa->key.tfm)) {
1308 free_percpu(rx_sa->stats);
1309 return PTR_ERR(rx_sa->key.tfm);
1312 rx_sa->active = false;
1314 atomic_set(&rx_sa->refcnt, 1);
1315 spin_lock_init(&rx_sa->lock);
1320 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1322 rx_sa->active = false;
1324 macsec_rxsa_put(rx_sa);
1327 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1331 for (i = 0; i < MACSEC_NUM_AN; i++) {
1332 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1334 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1339 macsec_rxsc_put(rx_sc);
1342 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1344 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1346 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1348 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1349 if (rx_sc->sci == sci) {
1352 rcu_assign_pointer(*rx_scp, rx_sc->next);
1360 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1362 struct macsec_rx_sc *rx_sc;
1363 struct macsec_dev *macsec;
1364 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1365 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1366 struct macsec_secy *secy;
1368 list_for_each_entry(macsec, &rxd->secys, secys) {
1369 if (find_rx_sc_rtnl(&macsec->secy, sci))
1370 return ERR_PTR(-EEXIST);
1373 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1375 return ERR_PTR(-ENOMEM);
1377 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1378 if (!rx_sc->stats) {
1380 return ERR_PTR(-ENOMEM);
1384 rx_sc->active = true;
1385 atomic_set(&rx_sc->refcnt, 1);
1387 secy = &macsec_priv(dev)->secy;
1388 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1389 rcu_assign_pointer(secy->rx_sc, rx_sc);
1397 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1400 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1404 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1405 if (IS_ERR(tx_sa->key.tfm)) {
1406 free_percpu(tx_sa->stats);
1407 return PTR_ERR(tx_sa->key.tfm);
1410 tx_sa->active = false;
1411 atomic_set(&tx_sa->refcnt, 1);
1412 spin_lock_init(&tx_sa->lock);
1417 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1419 tx_sa->active = false;
1421 macsec_txsa_put(tx_sa);
1424 static struct genl_family macsec_fam = {
1425 .id = GENL_ID_GENERATE,
1426 .name = MACSEC_GENL_NAME,
1428 .version = MACSEC_GENL_VERSION,
1429 .maxattr = MACSEC_ATTR_MAX,
1433 static struct net_device *get_dev_from_nl(struct net *net,
1434 struct nlattr **attrs)
1436 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1437 struct net_device *dev;
1439 dev = __dev_get_by_index(net, ifindex);
1441 return ERR_PTR(-ENODEV);
1443 if (!netif_is_macsec(dev))
1444 return ERR_PTR(-ENODEV);
1449 static sci_t nla_get_sci(const struct nlattr *nla)
1451 return (__force sci_t)nla_get_u64(nla);
1454 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1457 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1460 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1461 struct nlattr **attrs,
1462 struct nlattr **tb_sa,
1463 struct net_device **devp,
1464 struct macsec_secy **secyp,
1465 struct macsec_tx_sc **scp,
1468 struct net_device *dev;
1469 struct macsec_secy *secy;
1470 struct macsec_tx_sc *tx_sc;
1471 struct macsec_tx_sa *tx_sa;
1473 if (!tb_sa[MACSEC_SA_ATTR_AN])
1474 return ERR_PTR(-EINVAL);
1476 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1478 dev = get_dev_from_nl(net, attrs);
1480 return ERR_CAST(dev);
1482 if (*assoc_num >= MACSEC_NUM_AN)
1483 return ERR_PTR(-EINVAL);
1485 secy = &macsec_priv(dev)->secy;
1486 tx_sc = &secy->tx_sc;
1488 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1490 return ERR_PTR(-ENODEV);
1498 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1499 struct nlattr **attrs,
1500 struct nlattr **tb_rxsc,
1501 struct net_device **devp,
1502 struct macsec_secy **secyp)
1504 struct net_device *dev;
1505 struct macsec_secy *secy;
1506 struct macsec_rx_sc *rx_sc;
1509 dev = get_dev_from_nl(net, attrs);
1511 return ERR_CAST(dev);
1513 secy = &macsec_priv(dev)->secy;
1515 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1516 return ERR_PTR(-EINVAL);
1518 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1519 rx_sc = find_rx_sc_rtnl(secy, sci);
1521 return ERR_PTR(-ENODEV);
1529 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1530 struct nlattr **attrs,
1531 struct nlattr **tb_rxsc,
1532 struct nlattr **tb_sa,
1533 struct net_device **devp,
1534 struct macsec_secy **secyp,
1535 struct macsec_rx_sc **scp,
1538 struct macsec_rx_sc *rx_sc;
1539 struct macsec_rx_sa *rx_sa;
1541 if (!tb_sa[MACSEC_SA_ATTR_AN])
1542 return ERR_PTR(-EINVAL);
1544 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1545 if (*assoc_num >= MACSEC_NUM_AN)
1546 return ERR_PTR(-EINVAL);
1548 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1550 return ERR_CAST(rx_sc);
1552 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1554 return ERR_PTR(-ENODEV);
1561 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1562 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1563 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1564 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1567 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1568 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1569 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1572 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1573 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1574 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1575 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1576 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1577 .len = MACSEC_KEYID_LEN, },
1578 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1579 .len = MACSEC_MAX_KEY_LEN, },
1582 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1584 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1587 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG],
1588 macsec_genl_sa_policy))
1594 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1596 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1599 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG],
1600 macsec_genl_rxsc_policy))
1606 static bool validate_add_rxsa(struct nlattr **attrs)
1608 if (!attrs[MACSEC_SA_ATTR_AN] ||
1609 !attrs[MACSEC_SA_ATTR_KEY] ||
1610 !attrs[MACSEC_SA_ATTR_KEYID])
1613 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1616 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1619 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1620 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1624 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1630 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1632 struct net_device *dev;
1633 struct nlattr **attrs = info->attrs;
1634 struct macsec_secy *secy;
1635 struct macsec_rx_sc *rx_sc;
1636 struct macsec_rx_sa *rx_sa;
1637 unsigned char assoc_num;
1638 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1639 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1642 if (!attrs[MACSEC_ATTR_IFINDEX])
1645 if (parse_sa_config(attrs, tb_sa))
1648 if (parse_rxsc_config(attrs, tb_rxsc))
1651 if (!validate_add_rxsa(tb_sa))
1655 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1656 if (IS_ERR(rx_sc)) {
1658 return PTR_ERR(rx_sc);
1661 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1663 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1664 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1665 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1670 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1676 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1682 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1683 secy->key_len, secy->icv_len);
1690 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1691 spin_lock_bh(&rx_sa->lock);
1692 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1693 spin_unlock_bh(&rx_sa->lock);
1696 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1697 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1699 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1701 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1708 static bool validate_add_rxsc(struct nlattr **attrs)
1710 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1713 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1714 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1721 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1723 struct net_device *dev;
1724 sci_t sci = MACSEC_UNDEF_SCI;
1725 struct nlattr **attrs = info->attrs;
1726 struct macsec_rx_sc *rx_sc;
1727 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1729 if (!attrs[MACSEC_ATTR_IFINDEX])
1732 if (parse_rxsc_config(attrs, tb_rxsc))
1735 if (!validate_add_rxsc(tb_rxsc))
1739 dev = get_dev_from_nl(genl_info_net(info), attrs);
1742 return PTR_ERR(dev);
1745 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1747 rx_sc = create_rx_sc(dev, sci);
1748 if (IS_ERR(rx_sc)) {
1750 return PTR_ERR(rx_sc);
1753 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1754 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1761 static bool validate_add_txsa(struct nlattr **attrs)
1763 if (!attrs[MACSEC_SA_ATTR_AN] ||
1764 !attrs[MACSEC_SA_ATTR_PN] ||
1765 !attrs[MACSEC_SA_ATTR_KEY] ||
1766 !attrs[MACSEC_SA_ATTR_KEYID])
1769 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1772 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1775 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1776 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1780 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1786 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1788 struct net_device *dev;
1789 struct nlattr **attrs = info->attrs;
1790 struct macsec_secy *secy;
1791 struct macsec_tx_sc *tx_sc;
1792 struct macsec_tx_sa *tx_sa;
1793 unsigned char assoc_num;
1794 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1797 if (!attrs[MACSEC_ATTR_IFINDEX])
1800 if (parse_sa_config(attrs, tb_sa))
1803 if (!validate_add_txsa(tb_sa))
1807 dev = get_dev_from_nl(genl_info_net(info), attrs);
1810 return PTR_ERR(dev);
1813 secy = &macsec_priv(dev)->secy;
1814 tx_sc = &secy->tx_sc;
1816 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1818 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1819 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1820 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1825 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1831 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1837 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1838 secy->key_len, secy->icv_len);
1845 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1847 spin_lock_bh(&tx_sa->lock);
1848 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1849 spin_unlock_bh(&tx_sa->lock);
1851 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1852 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1854 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1855 secy->operational = true;
1857 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1864 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1866 struct nlattr **attrs = info->attrs;
1867 struct net_device *dev;
1868 struct macsec_secy *secy;
1869 struct macsec_rx_sc *rx_sc;
1870 struct macsec_rx_sa *rx_sa;
1872 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1873 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1875 if (!attrs[MACSEC_ATTR_IFINDEX])
1878 if (parse_sa_config(attrs, tb_sa))
1881 if (parse_rxsc_config(attrs, tb_rxsc))
1885 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1886 &dev, &secy, &rx_sc, &assoc_num);
1887 if (IS_ERR(rx_sa)) {
1889 return PTR_ERR(rx_sa);
1892 if (rx_sa->active) {
1897 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1905 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1907 struct nlattr **attrs = info->attrs;
1908 struct net_device *dev;
1909 struct macsec_secy *secy;
1910 struct macsec_rx_sc *rx_sc;
1912 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1914 if (!attrs[MACSEC_ATTR_IFINDEX])
1917 if (parse_rxsc_config(attrs, tb_rxsc))
1920 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1924 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1927 return PTR_ERR(dev);
1930 secy = &macsec_priv(dev)->secy;
1931 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1933 rx_sc = del_rx_sc(secy, sci);
1945 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1947 struct nlattr **attrs = info->attrs;
1948 struct net_device *dev;
1949 struct macsec_secy *secy;
1950 struct macsec_tx_sc *tx_sc;
1951 struct macsec_tx_sa *tx_sa;
1953 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1955 if (!attrs[MACSEC_ATTR_IFINDEX])
1958 if (parse_sa_config(attrs, tb_sa))
1962 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1963 &dev, &secy, &tx_sc, &assoc_num);
1964 if (IS_ERR(tx_sa)) {
1966 return PTR_ERR(tx_sa);
1969 if (tx_sa->active) {
1974 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
1982 static bool validate_upd_sa(struct nlattr **attrs)
1984 if (!attrs[MACSEC_SA_ATTR_AN] ||
1985 attrs[MACSEC_SA_ATTR_KEY] ||
1986 attrs[MACSEC_SA_ATTR_KEYID])
1989 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1992 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1995 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1996 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2003 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2005 struct nlattr **attrs = info->attrs;
2006 struct net_device *dev;
2007 struct macsec_secy *secy;
2008 struct macsec_tx_sc *tx_sc;
2009 struct macsec_tx_sa *tx_sa;
2011 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2013 if (!attrs[MACSEC_ATTR_IFINDEX])
2016 if (parse_sa_config(attrs, tb_sa))
2019 if (!validate_upd_sa(tb_sa))
2023 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2024 &dev, &secy, &tx_sc, &assoc_num);
2025 if (IS_ERR(tx_sa)) {
2027 return PTR_ERR(tx_sa);
2030 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2031 spin_lock_bh(&tx_sa->lock);
2032 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2033 spin_unlock_bh(&tx_sa->lock);
2036 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2037 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2039 if (assoc_num == tx_sc->encoding_sa)
2040 secy->operational = tx_sa->active;
2047 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2049 struct nlattr **attrs = info->attrs;
2050 struct net_device *dev;
2051 struct macsec_secy *secy;
2052 struct macsec_rx_sc *rx_sc;
2053 struct macsec_rx_sa *rx_sa;
2055 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2056 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2058 if (!attrs[MACSEC_ATTR_IFINDEX])
2061 if (parse_rxsc_config(attrs, tb_rxsc))
2064 if (parse_sa_config(attrs, tb_sa))
2067 if (!validate_upd_sa(tb_sa))
2071 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2072 &dev, &secy, &rx_sc, &assoc_num);
2073 if (IS_ERR(rx_sa)) {
2075 return PTR_ERR(rx_sa);
2078 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2079 spin_lock_bh(&rx_sa->lock);
2080 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2081 spin_unlock_bh(&rx_sa->lock);
2084 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2085 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2091 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2093 struct nlattr **attrs = info->attrs;
2094 struct net_device *dev;
2095 struct macsec_secy *secy;
2096 struct macsec_rx_sc *rx_sc;
2097 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2099 if (!attrs[MACSEC_ATTR_IFINDEX])
2102 if (parse_rxsc_config(attrs, tb_rxsc))
2105 if (!validate_add_rxsc(tb_rxsc))
2109 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2110 if (IS_ERR(rx_sc)) {
2112 return PTR_ERR(rx_sc);
2115 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2116 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2118 if (rx_sc->active != new)
2119 secy->n_rx_sc += new ? 1 : -1;
2121 rx_sc->active = new;
2129 static int copy_tx_sa_stats(struct sk_buff *skb,
2130 struct macsec_tx_sa_stats __percpu *pstats)
2132 struct macsec_tx_sa_stats sum = {0, };
2135 for_each_possible_cpu(cpu) {
2136 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2138 sum.OutPktsProtected += stats->OutPktsProtected;
2139 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2142 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2143 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2149 static int copy_rx_sa_stats(struct sk_buff *skb,
2150 struct macsec_rx_sa_stats __percpu *pstats)
2152 struct macsec_rx_sa_stats sum = {0, };
2155 for_each_possible_cpu(cpu) {
2156 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2158 sum.InPktsOK += stats->InPktsOK;
2159 sum.InPktsInvalid += stats->InPktsInvalid;
2160 sum.InPktsNotValid += stats->InPktsNotValid;
2161 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2162 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2165 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2166 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2167 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2168 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2169 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2175 static int copy_rx_sc_stats(struct sk_buff *skb,
2176 struct pcpu_rx_sc_stats __percpu *pstats)
2178 struct macsec_rx_sc_stats sum = {0, };
2181 for_each_possible_cpu(cpu) {
2182 const struct pcpu_rx_sc_stats *stats;
2183 struct macsec_rx_sc_stats tmp;
2186 stats = per_cpu_ptr(pstats, cpu);
2188 start = u64_stats_fetch_begin_irq(&stats->syncp);
2189 memcpy(&tmp, &stats->stats, sizeof(tmp));
2190 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2192 sum.InOctetsValidated += tmp.InOctetsValidated;
2193 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2194 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2195 sum.InPktsDelayed += tmp.InPktsDelayed;
2196 sum.InPktsOK += tmp.InPktsOK;
2197 sum.InPktsInvalid += tmp.InPktsInvalid;
2198 sum.InPktsLate += tmp.InPktsLate;
2199 sum.InPktsNotValid += tmp.InPktsNotValid;
2200 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2201 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2204 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2205 sum.InOctetsValidated,
2206 MACSEC_RXSC_STATS_ATTR_PAD) ||
2207 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2208 sum.InOctetsDecrypted,
2209 MACSEC_RXSC_STATS_ATTR_PAD) ||
2210 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2211 sum.InPktsUnchecked,
2212 MACSEC_RXSC_STATS_ATTR_PAD) ||
2213 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2215 MACSEC_RXSC_STATS_ATTR_PAD) ||
2216 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2218 MACSEC_RXSC_STATS_ATTR_PAD) ||
2219 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2221 MACSEC_RXSC_STATS_ATTR_PAD) ||
2222 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2224 MACSEC_RXSC_STATS_ATTR_PAD) ||
2225 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2227 MACSEC_RXSC_STATS_ATTR_PAD) ||
2228 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2229 sum.InPktsNotUsingSA,
2230 MACSEC_RXSC_STATS_ATTR_PAD) ||
2231 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2233 MACSEC_RXSC_STATS_ATTR_PAD))
2239 static int copy_tx_sc_stats(struct sk_buff *skb,
2240 struct pcpu_tx_sc_stats __percpu *pstats)
2242 struct macsec_tx_sc_stats sum = {0, };
2245 for_each_possible_cpu(cpu) {
2246 const struct pcpu_tx_sc_stats *stats;
2247 struct macsec_tx_sc_stats tmp;
2250 stats = per_cpu_ptr(pstats, cpu);
2252 start = u64_stats_fetch_begin_irq(&stats->syncp);
2253 memcpy(&tmp, &stats->stats, sizeof(tmp));
2254 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2256 sum.OutPktsProtected += tmp.OutPktsProtected;
2257 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2258 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2259 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2262 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2263 sum.OutPktsProtected,
2264 MACSEC_TXSC_STATS_ATTR_PAD) ||
2265 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2266 sum.OutPktsEncrypted,
2267 MACSEC_TXSC_STATS_ATTR_PAD) ||
2268 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2269 sum.OutOctetsProtected,
2270 MACSEC_TXSC_STATS_ATTR_PAD) ||
2271 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2272 sum.OutOctetsEncrypted,
2273 MACSEC_TXSC_STATS_ATTR_PAD))
2279 static int copy_secy_stats(struct sk_buff *skb,
2280 struct pcpu_secy_stats __percpu *pstats)
2282 struct macsec_dev_stats sum = {0, };
2285 for_each_possible_cpu(cpu) {
2286 const struct pcpu_secy_stats *stats;
2287 struct macsec_dev_stats tmp;
2290 stats = per_cpu_ptr(pstats, cpu);
2292 start = u64_stats_fetch_begin_irq(&stats->syncp);
2293 memcpy(&tmp, &stats->stats, sizeof(tmp));
2294 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2296 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2297 sum.InPktsUntagged += tmp.InPktsUntagged;
2298 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2299 sum.InPktsNoTag += tmp.InPktsNoTag;
2300 sum.InPktsBadTag += tmp.InPktsBadTag;
2301 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2302 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2303 sum.InPktsOverrun += tmp.InPktsOverrun;
2306 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2307 sum.OutPktsUntagged,
2308 MACSEC_SECY_STATS_ATTR_PAD) ||
2309 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2311 MACSEC_SECY_STATS_ATTR_PAD) ||
2312 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2314 MACSEC_SECY_STATS_ATTR_PAD) ||
2315 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2317 MACSEC_SECY_STATS_ATTR_PAD) ||
2318 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2320 MACSEC_SECY_STATS_ATTR_PAD) ||
2321 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2322 sum.InPktsUnknownSCI,
2323 MACSEC_SECY_STATS_ATTR_PAD) ||
2324 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2326 MACSEC_SECY_STATS_ATTR_PAD) ||
2327 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2329 MACSEC_SECY_STATS_ATTR_PAD))
2335 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2337 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2338 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2343 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2344 MACSEC_SECY_ATTR_PAD) ||
2345 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2346 MACSEC_DEFAULT_CIPHER_ID,
2347 MACSEC_SECY_ATTR_PAD) ||
2348 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2349 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2350 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2351 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2352 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2353 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2354 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2355 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2356 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2357 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2360 if (secy->replay_protect) {
2361 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2365 nla_nest_end(skb, secy_nest);
2369 nla_nest_cancel(skb, secy_nest);
2373 static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2374 struct sk_buff *skb, struct netlink_callback *cb)
2376 struct macsec_rx_sc *rx_sc;
2377 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2378 struct nlattr *txsa_list, *rxsc_list;
2381 struct nlattr *attr;
2383 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2384 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2388 genl_dump_check_consistent(cb, hdr, &macsec_fam);
2390 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2391 goto nla_put_failure;
2393 if (nla_put_secy(secy, skb))
2394 goto nla_put_failure;
2396 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2398 goto nla_put_failure;
2399 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2400 nla_nest_cancel(skb, attr);
2401 goto nla_put_failure;
2403 nla_nest_end(skb, attr);
2405 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2407 goto nla_put_failure;
2408 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2409 nla_nest_cancel(skb, attr);
2410 goto nla_put_failure;
2412 nla_nest_end(skb, attr);
2414 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2416 goto nla_put_failure;
2417 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2418 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2419 struct nlattr *txsa_nest;
2424 txsa_nest = nla_nest_start(skb, j++);
2426 nla_nest_cancel(skb, txsa_list);
2427 goto nla_put_failure;
2430 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2431 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2432 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2433 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2434 nla_nest_cancel(skb, txsa_nest);
2435 nla_nest_cancel(skb, txsa_list);
2436 goto nla_put_failure;
2439 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2441 nla_nest_cancel(skb, txsa_nest);
2442 nla_nest_cancel(skb, txsa_list);
2443 goto nla_put_failure;
2445 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2446 nla_nest_cancel(skb, attr);
2447 nla_nest_cancel(skb, txsa_nest);
2448 nla_nest_cancel(skb, txsa_list);
2449 goto nla_put_failure;
2451 nla_nest_end(skb, attr);
2453 nla_nest_end(skb, txsa_nest);
2455 nla_nest_end(skb, txsa_list);
2457 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2459 goto nla_put_failure;
2462 for_each_rxsc_rtnl(secy, rx_sc) {
2464 struct nlattr *rxsa_list;
2465 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2468 nla_nest_cancel(skb, rxsc_list);
2469 goto nla_put_failure;
2472 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2473 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2474 MACSEC_RXSC_ATTR_PAD)) {
2475 nla_nest_cancel(skb, rxsc_nest);
2476 nla_nest_cancel(skb, rxsc_list);
2477 goto nla_put_failure;
2480 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2482 nla_nest_cancel(skb, rxsc_nest);
2483 nla_nest_cancel(skb, rxsc_list);
2484 goto nla_put_failure;
2486 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2487 nla_nest_cancel(skb, attr);
2488 nla_nest_cancel(skb, rxsc_nest);
2489 nla_nest_cancel(skb, rxsc_list);
2490 goto nla_put_failure;
2492 nla_nest_end(skb, attr);
2494 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2496 nla_nest_cancel(skb, rxsc_nest);
2497 nla_nest_cancel(skb, rxsc_list);
2498 goto nla_put_failure;
2501 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2502 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2503 struct nlattr *rxsa_nest;
2508 rxsa_nest = nla_nest_start(skb, k++);
2510 nla_nest_cancel(skb, rxsa_list);
2511 nla_nest_cancel(skb, rxsc_nest);
2512 nla_nest_cancel(skb, rxsc_list);
2513 goto nla_put_failure;
2516 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2518 nla_nest_cancel(skb, rxsa_list);
2519 nla_nest_cancel(skb, rxsc_nest);
2520 nla_nest_cancel(skb, rxsc_list);
2521 goto nla_put_failure;
2523 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2524 nla_nest_cancel(skb, attr);
2525 nla_nest_cancel(skb, rxsa_list);
2526 nla_nest_cancel(skb, rxsc_nest);
2527 nla_nest_cancel(skb, rxsc_list);
2528 goto nla_put_failure;
2530 nla_nest_end(skb, attr);
2532 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2533 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2534 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2535 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2536 nla_nest_cancel(skb, rxsa_nest);
2537 nla_nest_cancel(skb, rxsc_nest);
2538 nla_nest_cancel(skb, rxsc_list);
2539 goto nla_put_failure;
2541 nla_nest_end(skb, rxsa_nest);
2544 nla_nest_end(skb, rxsa_list);
2545 nla_nest_end(skb, rxsc_nest);
2548 nla_nest_end(skb, rxsc_list);
2550 genlmsg_end(skb, hdr);
2555 genlmsg_cancel(skb, hdr);
2559 static int macsec_generation = 1; /* protected by RTNL */
2561 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2563 struct net *net = sock_net(skb->sk);
2564 struct net_device *dev;
2567 dev_idx = cb->args[0];
2572 cb->seq = macsec_generation;
2574 for_each_netdev(net, dev) {
2575 struct macsec_secy *secy;
2580 if (!netif_is_macsec(dev))
2583 secy = &macsec_priv(dev)->secy;
2584 if (dump_secy(secy, dev, skb, cb) < 0)
2596 static const struct genl_ops macsec_genl_ops[] = {
2598 .cmd = MACSEC_CMD_GET_TXSC,
2599 .dumpit = macsec_dump_txsc,
2600 .policy = macsec_genl_policy,
2603 .cmd = MACSEC_CMD_ADD_RXSC,
2604 .doit = macsec_add_rxsc,
2605 .policy = macsec_genl_policy,
2606 .flags = GENL_ADMIN_PERM,
2609 .cmd = MACSEC_CMD_DEL_RXSC,
2610 .doit = macsec_del_rxsc,
2611 .policy = macsec_genl_policy,
2612 .flags = GENL_ADMIN_PERM,
2615 .cmd = MACSEC_CMD_UPD_RXSC,
2616 .doit = macsec_upd_rxsc,
2617 .policy = macsec_genl_policy,
2618 .flags = GENL_ADMIN_PERM,
2621 .cmd = MACSEC_CMD_ADD_TXSA,
2622 .doit = macsec_add_txsa,
2623 .policy = macsec_genl_policy,
2624 .flags = GENL_ADMIN_PERM,
2627 .cmd = MACSEC_CMD_DEL_TXSA,
2628 .doit = macsec_del_txsa,
2629 .policy = macsec_genl_policy,
2630 .flags = GENL_ADMIN_PERM,
2633 .cmd = MACSEC_CMD_UPD_TXSA,
2634 .doit = macsec_upd_txsa,
2635 .policy = macsec_genl_policy,
2636 .flags = GENL_ADMIN_PERM,
2639 .cmd = MACSEC_CMD_ADD_RXSA,
2640 .doit = macsec_add_rxsa,
2641 .policy = macsec_genl_policy,
2642 .flags = GENL_ADMIN_PERM,
2645 .cmd = MACSEC_CMD_DEL_RXSA,
2646 .doit = macsec_del_rxsa,
2647 .policy = macsec_genl_policy,
2648 .flags = GENL_ADMIN_PERM,
2651 .cmd = MACSEC_CMD_UPD_RXSA,
2652 .doit = macsec_upd_rxsa,
2653 .policy = macsec_genl_policy,
2654 .flags = GENL_ADMIN_PERM,
2658 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2659 struct net_device *dev)
2661 struct macsec_dev *macsec = netdev_priv(dev);
2662 struct macsec_secy *secy = &macsec->secy;
2663 struct pcpu_secy_stats *secy_stats;
2667 if (!secy->protect_frames) {
2668 secy_stats = this_cpu_ptr(macsec->stats);
2669 u64_stats_update_begin(&secy_stats->syncp);
2670 secy_stats->stats.OutPktsUntagged++;
2671 u64_stats_update_end(&secy_stats->syncp);
2672 skb->dev = macsec->real_dev;
2674 ret = dev_queue_xmit(skb);
2675 count_tx(dev, ret, len);
2679 if (!secy->operational) {
2681 dev->stats.tx_dropped++;
2682 return NETDEV_TX_OK;
2685 skb = macsec_encrypt(skb, dev);
2687 if (PTR_ERR(skb) != -EINPROGRESS)
2688 dev->stats.tx_dropped++;
2689 return NETDEV_TX_OK;
2692 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2694 macsec_encrypt_finish(skb, dev);
2696 ret = dev_queue_xmit(skb);
2697 count_tx(dev, ret, len);
2701 #define MACSEC_FEATURES \
2702 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2703 static struct lock_class_key macsec_netdev_addr_lock_key;
2705 static int macsec_dev_init(struct net_device *dev)
2707 struct macsec_dev *macsec = macsec_priv(dev);
2708 struct net_device *real_dev = macsec->real_dev;
2711 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2715 err = gro_cells_init(&macsec->gro_cells, dev);
2717 free_percpu(dev->tstats);
2721 dev->features = real_dev->features & MACSEC_FEATURES;
2722 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2724 dev->needed_headroom = real_dev->needed_headroom +
2725 MACSEC_NEEDED_HEADROOM;
2726 dev->needed_tailroom = real_dev->needed_tailroom +
2727 MACSEC_NEEDED_TAILROOM;
2729 if (is_zero_ether_addr(dev->dev_addr))
2730 eth_hw_addr_inherit(dev, real_dev);
2731 if (is_zero_ether_addr(dev->broadcast))
2732 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2737 static void macsec_dev_uninit(struct net_device *dev)
2739 struct macsec_dev *macsec = macsec_priv(dev);
2741 gro_cells_destroy(&macsec->gro_cells);
2742 free_percpu(dev->tstats);
2745 static netdev_features_t macsec_fix_features(struct net_device *dev,
2746 netdev_features_t features)
2748 struct macsec_dev *macsec = macsec_priv(dev);
2749 struct net_device *real_dev = macsec->real_dev;
2751 features &= (real_dev->features & MACSEC_FEATURES) |
2752 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2753 features |= NETIF_F_LLTX;
2758 static int macsec_dev_open(struct net_device *dev)
2760 struct macsec_dev *macsec = macsec_priv(dev);
2761 struct net_device *real_dev = macsec->real_dev;
2764 if (!(real_dev->flags & IFF_UP))
2767 err = dev_uc_add(real_dev, dev->dev_addr);
2771 if (dev->flags & IFF_ALLMULTI) {
2772 err = dev_set_allmulti(real_dev, 1);
2777 if (dev->flags & IFF_PROMISC) {
2778 err = dev_set_promiscuity(real_dev, 1);
2780 goto clear_allmulti;
2783 if (netif_carrier_ok(real_dev))
2784 netif_carrier_on(dev);
2788 if (dev->flags & IFF_ALLMULTI)
2789 dev_set_allmulti(real_dev, -1);
2791 dev_uc_del(real_dev, dev->dev_addr);
2792 netif_carrier_off(dev);
2796 static int macsec_dev_stop(struct net_device *dev)
2798 struct macsec_dev *macsec = macsec_priv(dev);
2799 struct net_device *real_dev = macsec->real_dev;
2801 netif_carrier_off(dev);
2803 dev_mc_unsync(real_dev, dev);
2804 dev_uc_unsync(real_dev, dev);
2806 if (dev->flags & IFF_ALLMULTI)
2807 dev_set_allmulti(real_dev, -1);
2809 if (dev->flags & IFF_PROMISC)
2810 dev_set_promiscuity(real_dev, -1);
2812 dev_uc_del(real_dev, dev->dev_addr);
2817 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2819 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2821 if (!(dev->flags & IFF_UP))
2824 if (change & IFF_ALLMULTI)
2825 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2827 if (change & IFF_PROMISC)
2828 dev_set_promiscuity(real_dev,
2829 dev->flags & IFF_PROMISC ? 1 : -1);
2832 static void macsec_dev_set_rx_mode(struct net_device *dev)
2834 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2836 dev_mc_sync(real_dev, dev);
2837 dev_uc_sync(real_dev, dev);
2840 static int macsec_set_mac_address(struct net_device *dev, void *p)
2842 struct macsec_dev *macsec = macsec_priv(dev);
2843 struct net_device *real_dev = macsec->real_dev;
2844 struct sockaddr *addr = p;
2847 if (!is_valid_ether_addr(addr->sa_data))
2848 return -EADDRNOTAVAIL;
2850 if (!(dev->flags & IFF_UP))
2853 err = dev_uc_add(real_dev, addr->sa_data);
2857 dev_uc_del(real_dev, dev->dev_addr);
2860 ether_addr_copy(dev->dev_addr, addr->sa_data);
2864 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2866 struct macsec_dev *macsec = macsec_priv(dev);
2867 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2869 if (macsec->real_dev->mtu - extra < new_mtu)
2877 static struct rtnl_link_stats64 *macsec_get_stats64(struct net_device *dev,
2878 struct rtnl_link_stats64 *s)
2885 for_each_possible_cpu(cpu) {
2886 struct pcpu_sw_netstats *stats;
2887 struct pcpu_sw_netstats tmp;
2890 stats = per_cpu_ptr(dev->tstats, cpu);
2892 start = u64_stats_fetch_begin_irq(&stats->syncp);
2893 tmp.rx_packets = stats->rx_packets;
2894 tmp.rx_bytes = stats->rx_bytes;
2895 tmp.tx_packets = stats->tx_packets;
2896 tmp.tx_bytes = stats->tx_bytes;
2897 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2899 s->rx_packets += tmp.rx_packets;
2900 s->rx_bytes += tmp.rx_bytes;
2901 s->tx_packets += tmp.tx_packets;
2902 s->tx_bytes += tmp.tx_bytes;
2905 s->rx_dropped = dev->stats.rx_dropped;
2906 s->tx_dropped = dev->stats.tx_dropped;
2911 static int macsec_get_iflink(const struct net_device *dev)
2913 return macsec_priv(dev)->real_dev->ifindex;
2917 static int macsec_get_nest_level(struct net_device *dev)
2919 return macsec_priv(dev)->nest_level;
2923 static const struct net_device_ops macsec_netdev_ops = {
2924 .ndo_init = macsec_dev_init,
2925 .ndo_uninit = macsec_dev_uninit,
2926 .ndo_open = macsec_dev_open,
2927 .ndo_stop = macsec_dev_stop,
2928 .ndo_fix_features = macsec_fix_features,
2929 .ndo_change_mtu = macsec_change_mtu,
2930 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2931 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2932 .ndo_set_mac_address = macsec_set_mac_address,
2933 .ndo_start_xmit = macsec_start_xmit,
2934 .ndo_get_stats64 = macsec_get_stats64,
2935 .ndo_get_iflink = macsec_get_iflink,
2936 .ndo_get_lock_subclass = macsec_get_nest_level,
2939 static const struct device_type macsec_type = {
2943 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2944 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2945 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2946 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2947 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2948 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2949 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2950 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2951 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2952 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2953 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2954 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2955 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2958 static void macsec_free_netdev(struct net_device *dev)
2960 struct macsec_dev *macsec = macsec_priv(dev);
2961 struct net_device *real_dev = macsec->real_dev;
2963 free_percpu(macsec->stats);
2964 free_percpu(macsec->secy.tx_sc.stats);
2970 static void macsec_setup(struct net_device *dev)
2973 dev->priv_flags |= IFF_NO_QUEUE;
2974 dev->netdev_ops = &macsec_netdev_ops;
2975 dev->destructor = macsec_free_netdev;
2977 eth_zero_addr(dev->broadcast);
2980 static void macsec_changelink_common(struct net_device *dev,
2981 struct nlattr *data[])
2983 struct macsec_secy *secy;
2984 struct macsec_tx_sc *tx_sc;
2986 secy = &macsec_priv(dev)->secy;
2987 tx_sc = &secy->tx_sc;
2989 if (data[IFLA_MACSEC_ENCODING_SA]) {
2990 struct macsec_tx_sa *tx_sa;
2992 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
2993 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
2995 secy->operational = tx_sa && tx_sa->active;
2998 if (data[IFLA_MACSEC_WINDOW])
2999 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3001 if (data[IFLA_MACSEC_ENCRYPT])
3002 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3004 if (data[IFLA_MACSEC_PROTECT])
3005 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3007 if (data[IFLA_MACSEC_INC_SCI])
3008 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3010 if (data[IFLA_MACSEC_ES])
3011 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3013 if (data[IFLA_MACSEC_SCB])
3014 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3016 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3017 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3019 if (data[IFLA_MACSEC_VALIDATION])
3020 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3023 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3024 struct nlattr *data[])
3029 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3030 data[IFLA_MACSEC_ICV_LEN] ||
3031 data[IFLA_MACSEC_SCI] ||
3032 data[IFLA_MACSEC_PORT])
3035 macsec_changelink_common(dev, data);
3040 static void macsec_del_dev(struct macsec_dev *macsec)
3044 while (macsec->secy.rx_sc) {
3045 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3047 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3051 for (i = 0; i < MACSEC_NUM_AN; i++) {
3052 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3055 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3061 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3063 struct macsec_dev *macsec = macsec_priv(dev);
3064 struct net_device *real_dev = macsec->real_dev;
3066 unregister_netdevice_queue(dev, head);
3067 list_del_rcu(&macsec->secys);
3068 macsec_del_dev(macsec);
3069 netdev_upper_dev_unlink(real_dev, dev);
3071 macsec_generation++;
3074 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3076 struct macsec_dev *macsec = macsec_priv(dev);
3077 struct net_device *real_dev = macsec->real_dev;
3078 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3080 macsec_common_dellink(dev, head);
3082 if (list_empty(&rxd->secys)) {
3083 netdev_rx_handler_unregister(real_dev);
3088 static int register_macsec_dev(struct net_device *real_dev,
3089 struct net_device *dev)
3091 struct macsec_dev *macsec = macsec_priv(dev);
3092 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3097 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3101 INIT_LIST_HEAD(&rxd->secys);
3103 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3111 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3115 static bool sci_exists(struct net_device *dev, sci_t sci)
3117 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3118 struct macsec_dev *macsec;
3120 list_for_each_entry(macsec, &rxd->secys, secys) {
3121 if (macsec->secy.sci == sci)
3128 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3130 return make_sci(dev->dev_addr, port);
3133 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3135 struct macsec_dev *macsec = macsec_priv(dev);
3136 struct macsec_secy *secy = &macsec->secy;
3138 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3142 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3143 if (!secy->tx_sc.stats) {
3144 free_percpu(macsec->stats);
3148 if (sci == MACSEC_UNDEF_SCI)
3149 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3152 secy->operational = true;
3153 secy->key_len = DEFAULT_SAK_LEN;
3154 secy->icv_len = icv_len;
3155 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3156 secy->protect_frames = true;
3157 secy->replay_protect = false;
3160 secy->tx_sc.active = true;
3161 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3162 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3163 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3164 secy->tx_sc.end_station = false;
3165 secy->tx_sc.scb = false;
3170 static int macsec_newlink(struct net *net, struct net_device *dev,
3171 struct nlattr *tb[], struct nlattr *data[])
3173 struct macsec_dev *macsec = macsec_priv(dev);
3174 struct net_device *real_dev;
3177 u8 icv_len = DEFAULT_ICV_LEN;
3178 rx_handler_func_t *rx_handler;
3182 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3186 dev->priv_flags |= IFF_MACSEC;
3188 macsec->real_dev = real_dev;
3190 if (data && data[IFLA_MACSEC_ICV_LEN])
3191 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3192 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3194 rx_handler = rtnl_dereference(real_dev->rx_handler);
3195 if (rx_handler && rx_handler != macsec_handle_frame)
3198 err = register_netdevice(dev);
3204 macsec->nest_level = dev_get_nest_level(real_dev) + 1;
3205 netdev_lockdep_set_classes(dev);
3206 lockdep_set_class_and_subclass(&dev->addr_list_lock,
3207 &macsec_netdev_addr_lock_key,
3208 macsec_get_nest_level(dev));
3210 err = netdev_upper_dev_link(real_dev, dev);
3214 /* need to be already registered so that ->init has run and
3215 * the MAC addr is set
3217 if (data && data[IFLA_MACSEC_SCI])
3218 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3219 else if (data && data[IFLA_MACSEC_PORT])
3220 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3222 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3224 if (rx_handler && sci_exists(real_dev, sci)) {
3229 err = macsec_add_dev(dev, sci, icv_len);
3234 macsec_changelink_common(dev, data);
3236 err = register_macsec_dev(real_dev, dev);
3240 macsec_generation++;
3245 macsec_del_dev(macsec);
3247 netdev_upper_dev_unlink(real_dev, dev);
3249 unregister_netdevice(dev);
3253 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[])
3255 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3256 u8 icv_len = DEFAULT_ICV_LEN;
3263 if (data[IFLA_MACSEC_CIPHER_SUITE])
3264 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3266 if (data[IFLA_MACSEC_ICV_LEN]) {
3267 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3268 if (icv_len != DEFAULT_ICV_LEN) {
3269 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3270 struct crypto_aead *dummy_tfm;
3272 dummy_tfm = macsec_alloc_tfm(dummy_key,
3275 if (IS_ERR(dummy_tfm))
3276 return PTR_ERR(dummy_tfm);
3277 crypto_free_aead(dummy_tfm);
3282 case MACSEC_DEFAULT_CIPHER_ID:
3283 case MACSEC_DEFAULT_CIPHER_ALT:
3284 if (icv_len < MACSEC_MIN_ICV_LEN ||
3285 icv_len > MACSEC_STD_ICV_LEN)
3292 if (data[IFLA_MACSEC_ENCODING_SA]) {
3293 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3297 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3298 flag < IFLA_MACSEC_VALIDATION;
3301 if (nla_get_u8(data[flag]) > 1)
3306 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3307 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3308 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3310 if ((sci && (scb || es)) || (scb && es))
3313 if (data[IFLA_MACSEC_VALIDATION] &&
3314 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3317 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3318 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3319 !data[IFLA_MACSEC_WINDOW])
3325 static struct net *macsec_get_link_net(const struct net_device *dev)
3327 return dev_net(macsec_priv(dev)->real_dev);
3330 static size_t macsec_get_size(const struct net_device *dev)
3333 nla_total_size_64bit(8) + /* SCI */
3334 nla_total_size(1) + /* ICV_LEN */
3335 nla_total_size_64bit(8) + /* CIPHER_SUITE */
3336 nla_total_size(4) + /* WINDOW */
3337 nla_total_size(1) + /* ENCODING_SA */
3338 nla_total_size(1) + /* ENCRYPT */
3339 nla_total_size(1) + /* PROTECT */
3340 nla_total_size(1) + /* INC_SCI */
3341 nla_total_size(1) + /* ES */
3342 nla_total_size(1) + /* SCB */
3343 nla_total_size(1) + /* REPLAY_PROTECT */
3344 nla_total_size(1) + /* VALIDATION */
3348 static int macsec_fill_info(struct sk_buff *skb,
3349 const struct net_device *dev)
3351 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3352 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3354 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3356 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3357 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3358 MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) ||
3359 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3360 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3361 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3362 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3363 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3364 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3365 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3366 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3368 goto nla_put_failure;
3370 if (secy->replay_protect) {
3371 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3372 goto nla_put_failure;
3381 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3383 .priv_size = sizeof(struct macsec_dev),
3384 .maxtype = IFLA_MACSEC_MAX,
3385 .policy = macsec_rtnl_policy,
3386 .setup = macsec_setup,
3387 .validate = macsec_validate_attr,
3388 .newlink = macsec_newlink,
3389 .changelink = macsec_changelink,
3390 .dellink = macsec_dellink,
3391 .get_size = macsec_get_size,
3392 .fill_info = macsec_fill_info,
3393 .get_link_net = macsec_get_link_net,
3396 static bool is_macsec_master(struct net_device *dev)
3398 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3401 static int macsec_notify(struct notifier_block *this, unsigned long event,
3404 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3407 if (!is_macsec_master(real_dev))
3411 case NETDEV_UNREGISTER: {
3412 struct macsec_dev *m, *n;
3413 struct macsec_rxh_data *rxd;
3415 rxd = macsec_data_rtnl(real_dev);
3416 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3417 macsec_common_dellink(m->secy.netdev, &head);
3420 netdev_rx_handler_unregister(real_dev);
3423 unregister_netdevice_many(&head);
3426 case NETDEV_CHANGEMTU: {
3427 struct macsec_dev *m;
3428 struct macsec_rxh_data *rxd;
3430 rxd = macsec_data_rtnl(real_dev);
3431 list_for_each_entry(m, &rxd->secys, secys) {
3432 struct net_device *dev = m->secy.netdev;
3433 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3434 macsec_extra_len(true));
3437 dev_set_mtu(dev, mtu);
3445 static struct notifier_block macsec_notifier = {
3446 .notifier_call = macsec_notify,
3449 static int __init macsec_init(void)
3453 pr_info("MACsec IEEE 802.1AE\n");
3454 err = register_netdevice_notifier(&macsec_notifier);
3458 err = rtnl_link_register(&macsec_link_ops);
3462 err = genl_register_family_with_ops(&macsec_fam, macsec_genl_ops);
3469 rtnl_link_unregister(&macsec_link_ops);
3471 unregister_netdevice_notifier(&macsec_notifier);
3475 static void __exit macsec_exit(void)
3477 genl_unregister_family(&macsec_fam);
3478 rtnl_link_unregister(&macsec_link_ops);
3479 unregister_netdevice_notifier(&macsec_notifier);
3483 module_init(macsec_init);
3484 module_exit(macsec_exit);
3486 MODULE_ALIAS_RTNL_LINK("macsec");
3488 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3489 MODULE_LICENSE("GPL v2");