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;
276 * struct macsec_rxh_data - rx_handler private argument
277 * @secys: linked list of SecY's on this underlying device
279 struct macsec_rxh_data {
280 struct list_head secys;
283 static struct macsec_dev *macsec_priv(const struct net_device *dev)
285 return (struct macsec_dev *)netdev_priv(dev);
288 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
290 return rcu_dereference_bh(dev->rx_handler_data);
293 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
295 return rtnl_dereference(dev->rx_handler_data);
299 struct aead_request *req;
301 struct macsec_tx_sa *tx_sa;
302 struct macsec_rx_sa *rx_sa;
309 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
311 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
313 if (!sa || !sa->active)
316 if (!atomic_inc_not_zero(&sa->refcnt))
322 static void free_rx_sc_rcu(struct rcu_head *head)
324 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
326 free_percpu(rx_sc->stats);
330 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
332 return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL;
335 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
337 if (atomic_dec_and_test(&sc->refcnt))
338 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
341 static void free_rxsa(struct rcu_head *head)
343 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
345 crypto_free_aead(sa->key.tfm);
346 free_percpu(sa->stats);
347 macsec_rxsc_put(sa->sc);
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;
869 aead_request_free(macsec_skb_cb(skb)->req);
872 pn = ntohl(macsec_ethhdr(skb)->packet_number);
873 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
874 rcu_read_unlock_bh();
879 macsec_finalize_skb(skb, macsec->secy.icv_len,
880 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
881 macsec_reset_skb(skb, macsec->secy.netdev);
884 ret = gro_cells_receive(&macsec->gro_cells, skb);
885 if (ret == NET_RX_SUCCESS)
888 macsec->secy.netdev->stats.rx_dropped++;
890 rcu_read_unlock_bh();
893 macsec_rxsa_put(rx_sa);
897 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
898 struct net_device *dev,
899 struct macsec_rx_sa *rx_sa,
901 struct macsec_secy *secy)
904 struct scatterlist *sg;
906 struct aead_request *req;
907 struct macsec_eth_header *hdr;
908 u16 icv_len = secy->icv_len;
910 macsec_skb_cb(skb)->valid = false;
911 skb = skb_share_check(skb, GFP_ATOMIC);
913 return ERR_PTR(-ENOMEM);
915 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg);
918 return ERR_PTR(-ENOMEM);
921 hdr = (struct macsec_eth_header *)skb->data;
922 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
924 sg_init_table(sg, MAX_SKB_FRAGS + 1);
925 skb_to_sgvec(skb, sg, 0, skb->len);
927 if (hdr->tci_an & MACSEC_TCI_E) {
928 /* confidentiality: ethernet + macsec header
929 * authenticated, encrypted payload
931 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
933 aead_request_set_crypt(req, sg, sg, len, iv);
934 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
935 skb = skb_unshare(skb, GFP_ATOMIC);
937 aead_request_free(req);
938 return ERR_PTR(-ENOMEM);
941 /* integrity only: all headers + data authenticated */
942 aead_request_set_crypt(req, sg, sg, icv_len, iv);
943 aead_request_set_ad(req, skb->len - icv_len);
946 macsec_skb_cb(skb)->req = req;
947 macsec_skb_cb(skb)->rx_sa = rx_sa;
949 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
952 ret = crypto_aead_decrypt(req);
953 if (ret == -EINPROGRESS) {
955 } else if (ret != 0) {
956 /* decryption/authentication failed
957 * 10.6 if validateFrames is disabled, deliver anyway
959 if (ret != -EBADMSG) {
964 macsec_skb_cb(skb)->valid = true;
968 aead_request_free(req);
973 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
975 struct macsec_rx_sc *rx_sc;
977 for_each_rxsc(secy, rx_sc) {
978 if (rx_sc->sci == sci)
985 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
987 struct macsec_rx_sc *rx_sc;
989 for_each_rxsc_rtnl(secy, rx_sc) {
990 if (rx_sc->sci == sci)
997 static void handle_not_macsec(struct sk_buff *skb)
999 struct macsec_rxh_data *rxd;
1000 struct macsec_dev *macsec;
1003 rxd = macsec_data_rcu(skb->dev);
1005 /* 10.6 If the management control validateFrames is not
1006 * Strict, frames without a SecTAG are received, counted, and
1007 * delivered to the Controlled Port
1009 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1010 struct sk_buff *nskb;
1012 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1014 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1015 u64_stats_update_begin(&secy_stats->syncp);
1016 secy_stats->stats.InPktsNoTag++;
1017 u64_stats_update_end(&secy_stats->syncp);
1021 /* deliver on this port */
1022 nskb = skb_clone(skb, GFP_ATOMIC);
1026 nskb->dev = macsec->secy.netdev;
1028 ret = netif_rx(nskb);
1029 if (ret == NET_RX_SUCCESS) {
1030 u64_stats_update_begin(&secy_stats->syncp);
1031 secy_stats->stats.InPktsUntagged++;
1032 u64_stats_update_end(&secy_stats->syncp);
1034 macsec->secy.netdev->stats.rx_dropped++;
1041 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1043 struct sk_buff *skb = *pskb;
1044 struct net_device *dev = skb->dev;
1045 struct macsec_eth_header *hdr;
1046 struct macsec_secy *secy = NULL;
1047 struct macsec_rx_sc *rx_sc;
1048 struct macsec_rx_sa *rx_sa;
1049 struct macsec_rxh_data *rxd;
1050 struct macsec_dev *macsec;
1054 struct pcpu_rx_sc_stats *rxsc_stats;
1055 struct pcpu_secy_stats *secy_stats;
1059 if (skb_headroom(skb) < ETH_HLEN)
1062 hdr = macsec_ethhdr(skb);
1063 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1064 handle_not_macsec(skb);
1066 /* and deliver to the uncontrolled port */
1067 return RX_HANDLER_PASS;
1070 skb = skb_unshare(skb, GFP_ATOMIC);
1073 return RX_HANDLER_CONSUMED;
1076 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1078 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1082 hdr = macsec_ethhdr(skb);
1084 /* Frames with a SecTAG that has the TCI E bit set but the C
1085 * bit clear are discarded, as this reserved encoding is used
1086 * to identify frames with a SecTAG that are not to be
1087 * delivered to the Controlled Port.
1089 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1090 return RX_HANDLER_PASS;
1092 /* now, pull the extra length */
1093 if (hdr->tci_an & MACSEC_TCI_SC) {
1098 /* ethernet header is part of crypto processing */
1099 skb_push(skb, ETH_HLEN);
1101 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1102 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1103 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1106 rxd = macsec_data_rcu(skb->dev);
1108 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1109 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1112 secy = &macsec->secy;
1122 macsec = macsec_priv(dev);
1123 secy_stats = this_cpu_ptr(macsec->stats);
1124 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1126 if (!macsec_validate_skb(skb, secy->icv_len)) {
1127 u64_stats_update_begin(&secy_stats->syncp);
1128 secy_stats->stats.InPktsBadTag++;
1129 u64_stats_update_end(&secy_stats->syncp);
1133 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1135 /* 10.6.1 if the SA is not in use */
1137 /* If validateFrames is Strict or the C bit in the
1138 * SecTAG is set, discard
1140 if (hdr->tci_an & MACSEC_TCI_C ||
1141 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1142 u64_stats_update_begin(&rxsc_stats->syncp);
1143 rxsc_stats->stats.InPktsNotUsingSA++;
1144 u64_stats_update_end(&rxsc_stats->syncp);
1148 /* not Strict, the frame (with the SecTAG and ICV
1149 * removed) is delivered to the Controlled Port.
1151 u64_stats_update_begin(&rxsc_stats->syncp);
1152 rxsc_stats->stats.InPktsUnusedSA++;
1153 u64_stats_update_end(&rxsc_stats->syncp);
1157 /* First, PN check to avoid decrypting obviously wrong packets */
1158 pn = ntohl(hdr->packet_number);
1159 if (secy->replay_protect) {
1162 spin_lock(&rx_sa->lock);
1163 late = rx_sa->next_pn >= secy->replay_window &&
1164 pn < (rx_sa->next_pn - secy->replay_window);
1165 spin_unlock(&rx_sa->lock);
1168 u64_stats_update_begin(&rxsc_stats->syncp);
1169 rxsc_stats->stats.InPktsLate++;
1170 u64_stats_update_end(&rxsc_stats->syncp);
1175 /* Disabled && !changed text => skip validation */
1176 if (hdr->tci_an & MACSEC_TCI_C ||
1177 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1178 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1181 /* the decrypt callback needs the reference */
1182 if (PTR_ERR(skb) != -EINPROGRESS)
1183 macsec_rxsa_put(rx_sa);
1186 return RX_HANDLER_CONSUMED;
1189 if (!macsec_post_decrypt(skb, secy, pn))
1193 macsec_finalize_skb(skb, secy->icv_len,
1194 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1195 macsec_reset_skb(skb, secy->netdev);
1198 macsec_rxsa_put(rx_sa);
1200 ret = gro_cells_receive(&macsec->gro_cells, skb);
1201 if (ret == NET_RX_SUCCESS)
1202 count_rx(dev, skb->len);
1204 macsec->secy.netdev->stats.rx_dropped++;
1209 return RX_HANDLER_CONSUMED;
1212 macsec_rxsa_put(rx_sa);
1218 return RX_HANDLER_CONSUMED;
1221 /* 10.6.1 if the SC is not found */
1222 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1224 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1225 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1227 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1228 struct sk_buff *nskb;
1230 secy_stats = this_cpu_ptr(macsec->stats);
1232 /* If validateFrames is Strict or the C bit in the
1233 * SecTAG is set, discard
1236 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1237 u64_stats_update_begin(&secy_stats->syncp);
1238 secy_stats->stats.InPktsNoSCI++;
1239 u64_stats_update_end(&secy_stats->syncp);
1243 /* not strict, the frame (with the SecTAG and ICV
1244 * removed) is delivered to the Controlled Port.
1246 nskb = skb_clone(skb, GFP_ATOMIC);
1250 macsec_reset_skb(nskb, macsec->secy.netdev);
1252 ret = netif_rx(nskb);
1253 if (ret == NET_RX_SUCCESS) {
1254 u64_stats_update_begin(&secy_stats->syncp);
1255 secy_stats->stats.InPktsUnknownSCI++;
1256 u64_stats_update_end(&secy_stats->syncp);
1258 macsec->secy.netdev->stats.rx_dropped++;
1264 return RX_HANDLER_PASS;
1267 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1269 struct crypto_aead *tfm;
1272 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1277 ret = crypto_aead_setkey(tfm, key, key_len);
1281 ret = crypto_aead_setauthsize(tfm, icv_len);
1287 crypto_free_aead(tfm);
1288 return ERR_PTR(ret);
1291 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1294 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1298 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1299 if (IS_ERR(rx_sa->key.tfm)) {
1300 free_percpu(rx_sa->stats);
1301 return PTR_ERR(rx_sa->key.tfm);
1304 rx_sa->active = false;
1306 atomic_set(&rx_sa->refcnt, 1);
1307 spin_lock_init(&rx_sa->lock);
1312 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1314 rx_sa->active = false;
1316 macsec_rxsa_put(rx_sa);
1319 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1323 for (i = 0; i < MACSEC_NUM_AN; i++) {
1324 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1326 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1331 macsec_rxsc_put(rx_sc);
1334 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1336 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1338 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1340 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1341 if (rx_sc->sci == sci) {
1344 rcu_assign_pointer(*rx_scp, rx_sc->next);
1352 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1354 struct macsec_rx_sc *rx_sc;
1355 struct macsec_dev *macsec;
1356 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1357 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1358 struct macsec_secy *secy;
1360 list_for_each_entry(macsec, &rxd->secys, secys) {
1361 if (find_rx_sc_rtnl(&macsec->secy, sci))
1362 return ERR_PTR(-EEXIST);
1365 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1367 return ERR_PTR(-ENOMEM);
1369 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1370 if (!rx_sc->stats) {
1372 return ERR_PTR(-ENOMEM);
1376 rx_sc->active = true;
1377 atomic_set(&rx_sc->refcnt, 1);
1379 secy = &macsec_priv(dev)->secy;
1380 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1381 rcu_assign_pointer(secy->rx_sc, rx_sc);
1389 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1392 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1396 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1397 if (IS_ERR(tx_sa->key.tfm)) {
1398 free_percpu(tx_sa->stats);
1399 return PTR_ERR(tx_sa->key.tfm);
1402 tx_sa->active = false;
1403 atomic_set(&tx_sa->refcnt, 1);
1404 spin_lock_init(&tx_sa->lock);
1409 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1411 tx_sa->active = false;
1413 macsec_txsa_put(tx_sa);
1416 static struct genl_family macsec_fam = {
1417 .id = GENL_ID_GENERATE,
1418 .name = MACSEC_GENL_NAME,
1420 .version = MACSEC_GENL_VERSION,
1421 .maxattr = MACSEC_ATTR_MAX,
1425 static struct net_device *get_dev_from_nl(struct net *net,
1426 struct nlattr **attrs)
1428 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1429 struct net_device *dev;
1431 dev = __dev_get_by_index(net, ifindex);
1433 return ERR_PTR(-ENODEV);
1435 if (!netif_is_macsec(dev))
1436 return ERR_PTR(-ENODEV);
1441 static sci_t nla_get_sci(const struct nlattr *nla)
1443 return (__force sci_t)nla_get_u64(nla);
1446 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1449 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1452 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1453 struct nlattr **attrs,
1454 struct nlattr **tb_sa,
1455 struct net_device **devp,
1456 struct macsec_secy **secyp,
1457 struct macsec_tx_sc **scp,
1460 struct net_device *dev;
1461 struct macsec_secy *secy;
1462 struct macsec_tx_sc *tx_sc;
1463 struct macsec_tx_sa *tx_sa;
1465 if (!tb_sa[MACSEC_SA_ATTR_AN])
1466 return ERR_PTR(-EINVAL);
1468 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1470 dev = get_dev_from_nl(net, attrs);
1472 return ERR_CAST(dev);
1474 if (*assoc_num >= MACSEC_NUM_AN)
1475 return ERR_PTR(-EINVAL);
1477 secy = &macsec_priv(dev)->secy;
1478 tx_sc = &secy->tx_sc;
1480 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1482 return ERR_PTR(-ENODEV);
1490 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1491 struct nlattr **attrs,
1492 struct nlattr **tb_rxsc,
1493 struct net_device **devp,
1494 struct macsec_secy **secyp)
1496 struct net_device *dev;
1497 struct macsec_secy *secy;
1498 struct macsec_rx_sc *rx_sc;
1501 dev = get_dev_from_nl(net, attrs);
1503 return ERR_CAST(dev);
1505 secy = &macsec_priv(dev)->secy;
1507 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1508 return ERR_PTR(-EINVAL);
1510 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1511 rx_sc = find_rx_sc_rtnl(secy, sci);
1513 return ERR_PTR(-ENODEV);
1521 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1522 struct nlattr **attrs,
1523 struct nlattr **tb_rxsc,
1524 struct nlattr **tb_sa,
1525 struct net_device **devp,
1526 struct macsec_secy **secyp,
1527 struct macsec_rx_sc **scp,
1530 struct macsec_rx_sc *rx_sc;
1531 struct macsec_rx_sa *rx_sa;
1533 if (!tb_sa[MACSEC_SA_ATTR_AN])
1534 return ERR_PTR(-EINVAL);
1536 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1537 if (*assoc_num >= MACSEC_NUM_AN)
1538 return ERR_PTR(-EINVAL);
1540 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1542 return ERR_CAST(rx_sc);
1544 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1546 return ERR_PTR(-ENODEV);
1553 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1554 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1555 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1556 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1559 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1560 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1561 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1564 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1565 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1566 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1567 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1568 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1569 .len = MACSEC_KEYID_LEN, },
1570 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1571 .len = MACSEC_MAX_KEY_LEN, },
1574 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1576 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1579 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG],
1580 macsec_genl_sa_policy))
1586 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1588 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1591 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG],
1592 macsec_genl_rxsc_policy))
1598 static bool validate_add_rxsa(struct nlattr **attrs)
1600 if (!attrs[MACSEC_SA_ATTR_AN] ||
1601 !attrs[MACSEC_SA_ATTR_KEY] ||
1602 !attrs[MACSEC_SA_ATTR_KEYID])
1605 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1608 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1611 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1612 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1616 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1622 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1624 struct net_device *dev;
1625 struct nlattr **attrs = info->attrs;
1626 struct macsec_secy *secy;
1627 struct macsec_rx_sc *rx_sc;
1628 struct macsec_rx_sa *rx_sa;
1629 unsigned char assoc_num;
1630 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1631 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1634 if (!attrs[MACSEC_ATTR_IFINDEX])
1637 if (parse_sa_config(attrs, tb_sa))
1640 if (parse_rxsc_config(attrs, tb_rxsc))
1643 if (!validate_add_rxsa(tb_sa))
1647 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1648 if (IS_ERR(rx_sc) || !macsec_rxsc_get(rx_sc)) {
1650 return PTR_ERR(rx_sc);
1653 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1655 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1656 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1657 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1662 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1668 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1674 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1675 secy->key_len, secy->icv_len);
1682 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1683 spin_lock_bh(&rx_sa->lock);
1684 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1685 spin_unlock_bh(&rx_sa->lock);
1688 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1689 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1691 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1693 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1700 static bool validate_add_rxsc(struct nlattr **attrs)
1702 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1705 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1706 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1713 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1715 struct net_device *dev;
1716 sci_t sci = MACSEC_UNDEF_SCI;
1717 struct nlattr **attrs = info->attrs;
1718 struct macsec_rx_sc *rx_sc;
1719 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1721 if (!attrs[MACSEC_ATTR_IFINDEX])
1724 if (parse_rxsc_config(attrs, tb_rxsc))
1727 if (!validate_add_rxsc(tb_rxsc))
1731 dev = get_dev_from_nl(genl_info_net(info), attrs);
1734 return PTR_ERR(dev);
1737 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1739 rx_sc = create_rx_sc(dev, sci);
1740 if (IS_ERR(rx_sc)) {
1742 return PTR_ERR(rx_sc);
1745 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1746 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1753 static bool validate_add_txsa(struct nlattr **attrs)
1755 if (!attrs[MACSEC_SA_ATTR_AN] ||
1756 !attrs[MACSEC_SA_ATTR_PN] ||
1757 !attrs[MACSEC_SA_ATTR_KEY] ||
1758 !attrs[MACSEC_SA_ATTR_KEYID])
1761 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1764 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1767 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1768 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1772 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1778 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1780 struct net_device *dev;
1781 struct nlattr **attrs = info->attrs;
1782 struct macsec_secy *secy;
1783 struct macsec_tx_sc *tx_sc;
1784 struct macsec_tx_sa *tx_sa;
1785 unsigned char assoc_num;
1786 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1789 if (!attrs[MACSEC_ATTR_IFINDEX])
1792 if (parse_sa_config(attrs, tb_sa))
1795 if (!validate_add_txsa(tb_sa))
1799 dev = get_dev_from_nl(genl_info_net(info), attrs);
1802 return PTR_ERR(dev);
1805 secy = &macsec_priv(dev)->secy;
1806 tx_sc = &secy->tx_sc;
1808 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1810 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1811 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1812 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1817 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1823 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1829 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1830 secy->key_len, secy->icv_len);
1837 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1839 spin_lock_bh(&tx_sa->lock);
1840 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1841 spin_unlock_bh(&tx_sa->lock);
1843 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1844 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1846 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1847 secy->operational = true;
1849 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1856 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1858 struct nlattr **attrs = info->attrs;
1859 struct net_device *dev;
1860 struct macsec_secy *secy;
1861 struct macsec_rx_sc *rx_sc;
1862 struct macsec_rx_sa *rx_sa;
1864 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1865 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1867 if (!attrs[MACSEC_ATTR_IFINDEX])
1870 if (parse_sa_config(attrs, tb_sa))
1873 if (parse_rxsc_config(attrs, tb_rxsc))
1877 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1878 &dev, &secy, &rx_sc, &assoc_num);
1879 if (IS_ERR(rx_sa)) {
1881 return PTR_ERR(rx_sa);
1884 if (rx_sa->active) {
1889 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1897 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1899 struct nlattr **attrs = info->attrs;
1900 struct net_device *dev;
1901 struct macsec_secy *secy;
1902 struct macsec_rx_sc *rx_sc;
1904 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1906 if (!attrs[MACSEC_ATTR_IFINDEX])
1909 if (parse_rxsc_config(attrs, tb_rxsc))
1912 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1916 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1919 return PTR_ERR(dev);
1922 secy = &macsec_priv(dev)->secy;
1923 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1925 rx_sc = del_rx_sc(secy, sci);
1937 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1939 struct nlattr **attrs = info->attrs;
1940 struct net_device *dev;
1941 struct macsec_secy *secy;
1942 struct macsec_tx_sc *tx_sc;
1943 struct macsec_tx_sa *tx_sa;
1945 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1947 if (!attrs[MACSEC_ATTR_IFINDEX])
1950 if (parse_sa_config(attrs, tb_sa))
1954 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1955 &dev, &secy, &tx_sc, &assoc_num);
1956 if (IS_ERR(tx_sa)) {
1958 return PTR_ERR(tx_sa);
1961 if (tx_sa->active) {
1966 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
1974 static bool validate_upd_sa(struct nlattr **attrs)
1976 if (!attrs[MACSEC_SA_ATTR_AN] ||
1977 attrs[MACSEC_SA_ATTR_KEY] ||
1978 attrs[MACSEC_SA_ATTR_KEYID])
1981 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1984 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1987 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1988 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1995 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
1997 struct nlattr **attrs = info->attrs;
1998 struct net_device *dev;
1999 struct macsec_secy *secy;
2000 struct macsec_tx_sc *tx_sc;
2001 struct macsec_tx_sa *tx_sa;
2003 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2005 if (!attrs[MACSEC_ATTR_IFINDEX])
2008 if (parse_sa_config(attrs, tb_sa))
2011 if (!validate_upd_sa(tb_sa))
2015 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2016 &dev, &secy, &tx_sc, &assoc_num);
2017 if (IS_ERR(tx_sa)) {
2019 return PTR_ERR(tx_sa);
2022 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2023 spin_lock_bh(&tx_sa->lock);
2024 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2025 spin_unlock_bh(&tx_sa->lock);
2028 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2029 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2031 if (assoc_num == tx_sc->encoding_sa)
2032 secy->operational = tx_sa->active;
2039 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2041 struct nlattr **attrs = info->attrs;
2042 struct net_device *dev;
2043 struct macsec_secy *secy;
2044 struct macsec_rx_sc *rx_sc;
2045 struct macsec_rx_sa *rx_sa;
2047 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2048 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2050 if (!attrs[MACSEC_ATTR_IFINDEX])
2053 if (parse_rxsc_config(attrs, tb_rxsc))
2056 if (parse_sa_config(attrs, tb_sa))
2059 if (!validate_upd_sa(tb_sa))
2063 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2064 &dev, &secy, &rx_sc, &assoc_num);
2065 if (IS_ERR(rx_sa)) {
2067 return PTR_ERR(rx_sa);
2070 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2071 spin_lock_bh(&rx_sa->lock);
2072 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2073 spin_unlock_bh(&rx_sa->lock);
2076 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2077 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2083 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2085 struct nlattr **attrs = info->attrs;
2086 struct net_device *dev;
2087 struct macsec_secy *secy;
2088 struct macsec_rx_sc *rx_sc;
2089 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2091 if (!attrs[MACSEC_ATTR_IFINDEX])
2094 if (parse_rxsc_config(attrs, tb_rxsc))
2097 if (!validate_add_rxsc(tb_rxsc))
2101 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2102 if (IS_ERR(rx_sc)) {
2104 return PTR_ERR(rx_sc);
2107 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2108 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2110 if (rx_sc->active != new)
2111 secy->n_rx_sc += new ? 1 : -1;
2113 rx_sc->active = new;
2121 static int copy_tx_sa_stats(struct sk_buff *skb,
2122 struct macsec_tx_sa_stats __percpu *pstats)
2124 struct macsec_tx_sa_stats sum = {0, };
2127 for_each_possible_cpu(cpu) {
2128 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2130 sum.OutPktsProtected += stats->OutPktsProtected;
2131 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2134 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2135 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2141 static int copy_rx_sa_stats(struct sk_buff *skb,
2142 struct macsec_rx_sa_stats __percpu *pstats)
2144 struct macsec_rx_sa_stats sum = {0, };
2147 for_each_possible_cpu(cpu) {
2148 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2150 sum.InPktsOK += stats->InPktsOK;
2151 sum.InPktsInvalid += stats->InPktsInvalid;
2152 sum.InPktsNotValid += stats->InPktsNotValid;
2153 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2154 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2157 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2158 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2159 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2160 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2161 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2167 static int copy_rx_sc_stats(struct sk_buff *skb,
2168 struct pcpu_rx_sc_stats __percpu *pstats)
2170 struct macsec_rx_sc_stats sum = {0, };
2173 for_each_possible_cpu(cpu) {
2174 const struct pcpu_rx_sc_stats *stats;
2175 struct macsec_rx_sc_stats tmp;
2178 stats = per_cpu_ptr(pstats, cpu);
2180 start = u64_stats_fetch_begin_irq(&stats->syncp);
2181 memcpy(&tmp, &stats->stats, sizeof(tmp));
2182 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2184 sum.InOctetsValidated += tmp.InOctetsValidated;
2185 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2186 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2187 sum.InPktsDelayed += tmp.InPktsDelayed;
2188 sum.InPktsOK += tmp.InPktsOK;
2189 sum.InPktsInvalid += tmp.InPktsInvalid;
2190 sum.InPktsLate += tmp.InPktsLate;
2191 sum.InPktsNotValid += tmp.InPktsNotValid;
2192 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2193 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2196 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2197 sum.InOctetsValidated,
2198 MACSEC_RXSC_STATS_ATTR_PAD) ||
2199 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2200 sum.InOctetsDecrypted,
2201 MACSEC_RXSC_STATS_ATTR_PAD) ||
2202 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2203 sum.InPktsUnchecked,
2204 MACSEC_RXSC_STATS_ATTR_PAD) ||
2205 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2207 MACSEC_RXSC_STATS_ATTR_PAD) ||
2208 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2210 MACSEC_RXSC_STATS_ATTR_PAD) ||
2211 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2213 MACSEC_RXSC_STATS_ATTR_PAD) ||
2214 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2216 MACSEC_RXSC_STATS_ATTR_PAD) ||
2217 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2219 MACSEC_RXSC_STATS_ATTR_PAD) ||
2220 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2221 sum.InPktsNotUsingSA,
2222 MACSEC_RXSC_STATS_ATTR_PAD) ||
2223 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2225 MACSEC_RXSC_STATS_ATTR_PAD))
2231 static int copy_tx_sc_stats(struct sk_buff *skb,
2232 struct pcpu_tx_sc_stats __percpu *pstats)
2234 struct macsec_tx_sc_stats sum = {0, };
2237 for_each_possible_cpu(cpu) {
2238 const struct pcpu_tx_sc_stats *stats;
2239 struct macsec_tx_sc_stats tmp;
2242 stats = per_cpu_ptr(pstats, cpu);
2244 start = u64_stats_fetch_begin_irq(&stats->syncp);
2245 memcpy(&tmp, &stats->stats, sizeof(tmp));
2246 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2248 sum.OutPktsProtected += tmp.OutPktsProtected;
2249 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2250 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2251 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2254 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2255 sum.OutPktsProtected,
2256 MACSEC_TXSC_STATS_ATTR_PAD) ||
2257 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2258 sum.OutPktsEncrypted,
2259 MACSEC_TXSC_STATS_ATTR_PAD) ||
2260 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2261 sum.OutOctetsProtected,
2262 MACSEC_TXSC_STATS_ATTR_PAD) ||
2263 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2264 sum.OutOctetsEncrypted,
2265 MACSEC_TXSC_STATS_ATTR_PAD))
2271 static int copy_secy_stats(struct sk_buff *skb,
2272 struct pcpu_secy_stats __percpu *pstats)
2274 struct macsec_dev_stats sum = {0, };
2277 for_each_possible_cpu(cpu) {
2278 const struct pcpu_secy_stats *stats;
2279 struct macsec_dev_stats tmp;
2282 stats = per_cpu_ptr(pstats, cpu);
2284 start = u64_stats_fetch_begin_irq(&stats->syncp);
2285 memcpy(&tmp, &stats->stats, sizeof(tmp));
2286 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2288 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2289 sum.InPktsUntagged += tmp.InPktsUntagged;
2290 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2291 sum.InPktsNoTag += tmp.InPktsNoTag;
2292 sum.InPktsBadTag += tmp.InPktsBadTag;
2293 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2294 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2295 sum.InPktsOverrun += tmp.InPktsOverrun;
2298 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2299 sum.OutPktsUntagged,
2300 MACSEC_SECY_STATS_ATTR_PAD) ||
2301 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2303 MACSEC_SECY_STATS_ATTR_PAD) ||
2304 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2306 MACSEC_SECY_STATS_ATTR_PAD) ||
2307 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2309 MACSEC_SECY_STATS_ATTR_PAD) ||
2310 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2312 MACSEC_SECY_STATS_ATTR_PAD) ||
2313 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2314 sum.InPktsUnknownSCI,
2315 MACSEC_SECY_STATS_ATTR_PAD) ||
2316 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2318 MACSEC_SECY_STATS_ATTR_PAD) ||
2319 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2321 MACSEC_SECY_STATS_ATTR_PAD))
2327 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2329 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2330 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2335 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2336 MACSEC_SECY_ATTR_PAD) ||
2337 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2338 MACSEC_DEFAULT_CIPHER_ID,
2339 MACSEC_SECY_ATTR_PAD) ||
2340 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2341 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2342 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2343 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2344 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2345 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2346 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2347 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2348 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2349 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2352 if (secy->replay_protect) {
2353 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2357 nla_nest_end(skb, secy_nest);
2361 nla_nest_cancel(skb, secy_nest);
2365 static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2366 struct sk_buff *skb, struct netlink_callback *cb)
2368 struct macsec_rx_sc *rx_sc;
2369 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2370 struct nlattr *txsa_list, *rxsc_list;
2373 struct nlattr *attr;
2375 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2376 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2380 genl_dump_check_consistent(cb, hdr, &macsec_fam);
2382 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2383 goto nla_put_failure;
2385 if (nla_put_secy(secy, skb))
2386 goto nla_put_failure;
2388 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2390 goto nla_put_failure;
2391 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2392 nla_nest_cancel(skb, attr);
2393 goto nla_put_failure;
2395 nla_nest_end(skb, attr);
2397 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2399 goto nla_put_failure;
2400 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2401 nla_nest_cancel(skb, attr);
2402 goto nla_put_failure;
2404 nla_nest_end(skb, attr);
2406 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2408 goto nla_put_failure;
2409 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2410 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2411 struct nlattr *txsa_nest;
2416 txsa_nest = nla_nest_start(skb, j++);
2418 nla_nest_cancel(skb, txsa_list);
2419 goto nla_put_failure;
2422 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2423 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2424 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2425 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2426 nla_nest_cancel(skb, txsa_nest);
2427 nla_nest_cancel(skb, txsa_list);
2428 goto nla_put_failure;
2431 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2433 nla_nest_cancel(skb, txsa_nest);
2434 nla_nest_cancel(skb, txsa_list);
2435 goto nla_put_failure;
2437 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2438 nla_nest_cancel(skb, attr);
2439 nla_nest_cancel(skb, txsa_nest);
2440 nla_nest_cancel(skb, txsa_list);
2441 goto nla_put_failure;
2443 nla_nest_end(skb, attr);
2445 nla_nest_end(skb, txsa_nest);
2447 nla_nest_end(skb, txsa_list);
2449 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2451 goto nla_put_failure;
2454 for_each_rxsc_rtnl(secy, rx_sc) {
2456 struct nlattr *rxsa_list;
2457 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2460 nla_nest_cancel(skb, rxsc_list);
2461 goto nla_put_failure;
2464 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2465 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2466 MACSEC_RXSC_ATTR_PAD)) {
2467 nla_nest_cancel(skb, rxsc_nest);
2468 nla_nest_cancel(skb, rxsc_list);
2469 goto nla_put_failure;
2472 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2474 nla_nest_cancel(skb, rxsc_nest);
2475 nla_nest_cancel(skb, rxsc_list);
2476 goto nla_put_failure;
2478 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2479 nla_nest_cancel(skb, attr);
2480 nla_nest_cancel(skb, rxsc_nest);
2481 nla_nest_cancel(skb, rxsc_list);
2482 goto nla_put_failure;
2484 nla_nest_end(skb, attr);
2486 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2488 nla_nest_cancel(skb, rxsc_nest);
2489 nla_nest_cancel(skb, rxsc_list);
2490 goto nla_put_failure;
2493 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2494 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2495 struct nlattr *rxsa_nest;
2500 rxsa_nest = nla_nest_start(skb, k++);
2502 nla_nest_cancel(skb, rxsa_list);
2503 nla_nest_cancel(skb, rxsc_nest);
2504 nla_nest_cancel(skb, rxsc_list);
2505 goto nla_put_failure;
2508 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
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;
2515 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2516 nla_nest_cancel(skb, attr);
2517 nla_nest_cancel(skb, rxsa_list);
2518 nla_nest_cancel(skb, rxsc_nest);
2519 nla_nest_cancel(skb, rxsc_list);
2520 goto nla_put_failure;
2522 nla_nest_end(skb, attr);
2524 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2525 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2526 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2527 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2528 nla_nest_cancel(skb, rxsa_nest);
2529 nla_nest_cancel(skb, rxsc_nest);
2530 nla_nest_cancel(skb, rxsc_list);
2531 goto nla_put_failure;
2533 nla_nest_end(skb, rxsa_nest);
2536 nla_nest_end(skb, rxsa_list);
2537 nla_nest_end(skb, rxsc_nest);
2540 nla_nest_end(skb, rxsc_list);
2542 genlmsg_end(skb, hdr);
2547 genlmsg_cancel(skb, hdr);
2551 static int macsec_generation = 1; /* protected by RTNL */
2553 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2555 struct net *net = sock_net(skb->sk);
2556 struct net_device *dev;
2559 dev_idx = cb->args[0];
2564 cb->seq = macsec_generation;
2566 for_each_netdev(net, dev) {
2567 struct macsec_secy *secy;
2572 if (!netif_is_macsec(dev))
2575 secy = &macsec_priv(dev)->secy;
2576 if (dump_secy(secy, dev, skb, cb) < 0)
2588 static const struct genl_ops macsec_genl_ops[] = {
2590 .cmd = MACSEC_CMD_GET_TXSC,
2591 .dumpit = macsec_dump_txsc,
2592 .policy = macsec_genl_policy,
2595 .cmd = MACSEC_CMD_ADD_RXSC,
2596 .doit = macsec_add_rxsc,
2597 .policy = macsec_genl_policy,
2598 .flags = GENL_ADMIN_PERM,
2601 .cmd = MACSEC_CMD_DEL_RXSC,
2602 .doit = macsec_del_rxsc,
2603 .policy = macsec_genl_policy,
2604 .flags = GENL_ADMIN_PERM,
2607 .cmd = MACSEC_CMD_UPD_RXSC,
2608 .doit = macsec_upd_rxsc,
2609 .policy = macsec_genl_policy,
2610 .flags = GENL_ADMIN_PERM,
2613 .cmd = MACSEC_CMD_ADD_TXSA,
2614 .doit = macsec_add_txsa,
2615 .policy = macsec_genl_policy,
2616 .flags = GENL_ADMIN_PERM,
2619 .cmd = MACSEC_CMD_DEL_TXSA,
2620 .doit = macsec_del_txsa,
2621 .policy = macsec_genl_policy,
2622 .flags = GENL_ADMIN_PERM,
2625 .cmd = MACSEC_CMD_UPD_TXSA,
2626 .doit = macsec_upd_txsa,
2627 .policy = macsec_genl_policy,
2628 .flags = GENL_ADMIN_PERM,
2631 .cmd = MACSEC_CMD_ADD_RXSA,
2632 .doit = macsec_add_rxsa,
2633 .policy = macsec_genl_policy,
2634 .flags = GENL_ADMIN_PERM,
2637 .cmd = MACSEC_CMD_DEL_RXSA,
2638 .doit = macsec_del_rxsa,
2639 .policy = macsec_genl_policy,
2640 .flags = GENL_ADMIN_PERM,
2643 .cmd = MACSEC_CMD_UPD_RXSA,
2644 .doit = macsec_upd_rxsa,
2645 .policy = macsec_genl_policy,
2646 .flags = GENL_ADMIN_PERM,
2650 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2651 struct net_device *dev)
2653 struct macsec_dev *macsec = netdev_priv(dev);
2654 struct macsec_secy *secy = &macsec->secy;
2655 struct pcpu_secy_stats *secy_stats;
2659 if (!secy->protect_frames) {
2660 secy_stats = this_cpu_ptr(macsec->stats);
2661 u64_stats_update_begin(&secy_stats->syncp);
2662 secy_stats->stats.OutPktsUntagged++;
2663 u64_stats_update_end(&secy_stats->syncp);
2664 skb->dev = macsec->real_dev;
2666 ret = dev_queue_xmit(skb);
2667 count_tx(dev, ret, len);
2671 if (!secy->operational) {
2673 dev->stats.tx_dropped++;
2674 return NETDEV_TX_OK;
2677 skb = macsec_encrypt(skb, dev);
2679 if (PTR_ERR(skb) != -EINPROGRESS)
2680 dev->stats.tx_dropped++;
2681 return NETDEV_TX_OK;
2684 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2686 macsec_encrypt_finish(skb, dev);
2688 ret = dev_queue_xmit(skb);
2689 count_tx(dev, ret, len);
2693 #define MACSEC_FEATURES \
2694 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2695 static int macsec_dev_init(struct net_device *dev)
2697 struct macsec_dev *macsec = macsec_priv(dev);
2698 struct net_device *real_dev = macsec->real_dev;
2701 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2705 err = gro_cells_init(&macsec->gro_cells, dev);
2707 free_percpu(dev->tstats);
2711 dev->features = real_dev->features & MACSEC_FEATURES;
2712 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2714 dev->needed_headroom = real_dev->needed_headroom +
2715 MACSEC_NEEDED_HEADROOM;
2716 dev->needed_tailroom = real_dev->needed_tailroom +
2717 MACSEC_NEEDED_TAILROOM;
2719 if (is_zero_ether_addr(dev->dev_addr))
2720 eth_hw_addr_inherit(dev, real_dev);
2721 if (is_zero_ether_addr(dev->broadcast))
2722 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2727 static void macsec_dev_uninit(struct net_device *dev)
2729 struct macsec_dev *macsec = macsec_priv(dev);
2731 gro_cells_destroy(&macsec->gro_cells);
2732 free_percpu(dev->tstats);
2735 static netdev_features_t macsec_fix_features(struct net_device *dev,
2736 netdev_features_t features)
2738 struct macsec_dev *macsec = macsec_priv(dev);
2739 struct net_device *real_dev = macsec->real_dev;
2741 features &= (real_dev->features & MACSEC_FEATURES) |
2742 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2743 features |= NETIF_F_LLTX;
2748 static int macsec_dev_open(struct net_device *dev)
2750 struct macsec_dev *macsec = macsec_priv(dev);
2751 struct net_device *real_dev = macsec->real_dev;
2754 if (!(real_dev->flags & IFF_UP))
2757 err = dev_uc_add(real_dev, dev->dev_addr);
2761 if (dev->flags & IFF_ALLMULTI) {
2762 err = dev_set_allmulti(real_dev, 1);
2767 if (dev->flags & IFF_PROMISC) {
2768 err = dev_set_promiscuity(real_dev, 1);
2770 goto clear_allmulti;
2773 if (netif_carrier_ok(real_dev))
2774 netif_carrier_on(dev);
2778 if (dev->flags & IFF_ALLMULTI)
2779 dev_set_allmulti(real_dev, -1);
2781 dev_uc_del(real_dev, dev->dev_addr);
2782 netif_carrier_off(dev);
2786 static int macsec_dev_stop(struct net_device *dev)
2788 struct macsec_dev *macsec = macsec_priv(dev);
2789 struct net_device *real_dev = macsec->real_dev;
2791 netif_carrier_off(dev);
2793 dev_mc_unsync(real_dev, dev);
2794 dev_uc_unsync(real_dev, dev);
2796 if (dev->flags & IFF_ALLMULTI)
2797 dev_set_allmulti(real_dev, -1);
2799 if (dev->flags & IFF_PROMISC)
2800 dev_set_promiscuity(real_dev, -1);
2802 dev_uc_del(real_dev, dev->dev_addr);
2807 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2809 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2811 if (!(dev->flags & IFF_UP))
2814 if (change & IFF_ALLMULTI)
2815 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2817 if (change & IFF_PROMISC)
2818 dev_set_promiscuity(real_dev,
2819 dev->flags & IFF_PROMISC ? 1 : -1);
2822 static void macsec_dev_set_rx_mode(struct net_device *dev)
2824 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2826 dev_mc_sync(real_dev, dev);
2827 dev_uc_sync(real_dev, dev);
2830 static int macsec_set_mac_address(struct net_device *dev, void *p)
2832 struct macsec_dev *macsec = macsec_priv(dev);
2833 struct net_device *real_dev = macsec->real_dev;
2834 struct sockaddr *addr = p;
2837 if (!is_valid_ether_addr(addr->sa_data))
2838 return -EADDRNOTAVAIL;
2840 if (!(dev->flags & IFF_UP))
2843 err = dev_uc_add(real_dev, addr->sa_data);
2847 dev_uc_del(real_dev, dev->dev_addr);
2850 ether_addr_copy(dev->dev_addr, addr->sa_data);
2854 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2856 struct macsec_dev *macsec = macsec_priv(dev);
2857 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2859 if (macsec->real_dev->mtu - extra < new_mtu)
2867 static struct rtnl_link_stats64 *macsec_get_stats64(struct net_device *dev,
2868 struct rtnl_link_stats64 *s)
2875 for_each_possible_cpu(cpu) {
2876 struct pcpu_sw_netstats *stats;
2877 struct pcpu_sw_netstats tmp;
2880 stats = per_cpu_ptr(dev->tstats, cpu);
2882 start = u64_stats_fetch_begin_irq(&stats->syncp);
2883 tmp.rx_packets = stats->rx_packets;
2884 tmp.rx_bytes = stats->rx_bytes;
2885 tmp.tx_packets = stats->tx_packets;
2886 tmp.tx_bytes = stats->tx_bytes;
2887 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2889 s->rx_packets += tmp.rx_packets;
2890 s->rx_bytes += tmp.rx_bytes;
2891 s->tx_packets += tmp.tx_packets;
2892 s->tx_bytes += tmp.tx_bytes;
2895 s->rx_dropped = dev->stats.rx_dropped;
2896 s->tx_dropped = dev->stats.tx_dropped;
2901 static int macsec_get_iflink(const struct net_device *dev)
2903 return macsec_priv(dev)->real_dev->ifindex;
2906 static const struct net_device_ops macsec_netdev_ops = {
2907 .ndo_init = macsec_dev_init,
2908 .ndo_uninit = macsec_dev_uninit,
2909 .ndo_open = macsec_dev_open,
2910 .ndo_stop = macsec_dev_stop,
2911 .ndo_fix_features = macsec_fix_features,
2912 .ndo_change_mtu = macsec_change_mtu,
2913 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2914 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2915 .ndo_set_mac_address = macsec_set_mac_address,
2916 .ndo_start_xmit = macsec_start_xmit,
2917 .ndo_get_stats64 = macsec_get_stats64,
2918 .ndo_get_iflink = macsec_get_iflink,
2921 static const struct device_type macsec_type = {
2925 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2926 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2927 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2928 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2929 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2930 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2931 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2932 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2933 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2934 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2935 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2936 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2937 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2940 static void macsec_free_netdev(struct net_device *dev)
2942 struct macsec_dev *macsec = macsec_priv(dev);
2943 struct net_device *real_dev = macsec->real_dev;
2945 free_percpu(macsec->stats);
2946 free_percpu(macsec->secy.tx_sc.stats);
2952 static void macsec_setup(struct net_device *dev)
2955 dev->priv_flags |= IFF_NO_QUEUE;
2956 dev->netdev_ops = &macsec_netdev_ops;
2957 dev->destructor = macsec_free_netdev;
2959 eth_zero_addr(dev->broadcast);
2962 static void macsec_changelink_common(struct net_device *dev,
2963 struct nlattr *data[])
2965 struct macsec_secy *secy;
2966 struct macsec_tx_sc *tx_sc;
2968 secy = &macsec_priv(dev)->secy;
2969 tx_sc = &secy->tx_sc;
2971 if (data[IFLA_MACSEC_ENCODING_SA]) {
2972 struct macsec_tx_sa *tx_sa;
2974 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
2975 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
2977 secy->operational = tx_sa && tx_sa->active;
2980 if (data[IFLA_MACSEC_WINDOW])
2981 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
2983 if (data[IFLA_MACSEC_ENCRYPT])
2984 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
2986 if (data[IFLA_MACSEC_PROTECT])
2987 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
2989 if (data[IFLA_MACSEC_INC_SCI])
2990 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
2992 if (data[IFLA_MACSEC_ES])
2993 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
2995 if (data[IFLA_MACSEC_SCB])
2996 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
2998 if (data[IFLA_MACSEC_REPLAY_PROTECT])
2999 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3001 if (data[IFLA_MACSEC_VALIDATION])
3002 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3005 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3006 struct nlattr *data[])
3011 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3012 data[IFLA_MACSEC_ICV_LEN] ||
3013 data[IFLA_MACSEC_SCI] ||
3014 data[IFLA_MACSEC_PORT])
3017 macsec_changelink_common(dev, data);
3022 static void macsec_del_dev(struct macsec_dev *macsec)
3026 while (macsec->secy.rx_sc) {
3027 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3029 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3033 for (i = 0; i < MACSEC_NUM_AN; i++) {
3034 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3037 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3043 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3045 struct macsec_dev *macsec = macsec_priv(dev);
3046 struct net_device *real_dev = macsec->real_dev;
3047 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3049 macsec_generation++;
3051 unregister_netdevice_queue(dev, head);
3052 list_del_rcu(&macsec->secys);
3053 if (list_empty(&rxd->secys)) {
3054 netdev_rx_handler_unregister(real_dev);
3058 macsec_del_dev(macsec);
3061 static int register_macsec_dev(struct net_device *real_dev,
3062 struct net_device *dev)
3064 struct macsec_dev *macsec = macsec_priv(dev);
3065 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3070 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3074 INIT_LIST_HEAD(&rxd->secys);
3076 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3084 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3088 static bool sci_exists(struct net_device *dev, sci_t sci)
3090 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3091 struct macsec_dev *macsec;
3093 list_for_each_entry(macsec, &rxd->secys, secys) {
3094 if (macsec->secy.sci == sci)
3101 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3103 return make_sci(dev->dev_addr, port);
3106 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3108 struct macsec_dev *macsec = macsec_priv(dev);
3109 struct macsec_secy *secy = &macsec->secy;
3111 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3115 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3116 if (!secy->tx_sc.stats) {
3117 free_percpu(macsec->stats);
3121 if (sci == MACSEC_UNDEF_SCI)
3122 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3125 secy->operational = true;
3126 secy->key_len = DEFAULT_SAK_LEN;
3127 secy->icv_len = icv_len;
3128 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3129 secy->protect_frames = true;
3130 secy->replay_protect = false;
3133 secy->tx_sc.active = true;
3134 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3135 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3136 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3137 secy->tx_sc.end_station = false;
3138 secy->tx_sc.scb = false;
3143 static int macsec_newlink(struct net *net, struct net_device *dev,
3144 struct nlattr *tb[], struct nlattr *data[])
3146 struct macsec_dev *macsec = macsec_priv(dev);
3147 struct net_device *real_dev;
3150 u8 icv_len = DEFAULT_ICV_LEN;
3151 rx_handler_func_t *rx_handler;
3155 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3159 dev->priv_flags |= IFF_MACSEC;
3161 macsec->real_dev = real_dev;
3163 if (data && data[IFLA_MACSEC_ICV_LEN])
3164 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3165 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3167 rx_handler = rtnl_dereference(real_dev->rx_handler);
3168 if (rx_handler && rx_handler != macsec_handle_frame)
3171 err = register_netdevice(dev);
3175 /* need to be already registered so that ->init has run and
3176 * the MAC addr is set
3178 if (data && data[IFLA_MACSEC_SCI])
3179 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3180 else if (data && data[IFLA_MACSEC_PORT])
3181 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3183 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3185 if (rx_handler && sci_exists(real_dev, sci)) {
3190 err = macsec_add_dev(dev, sci, icv_len);
3195 macsec_changelink_common(dev, data);
3197 err = register_macsec_dev(real_dev, dev);
3201 macsec_generation++;
3208 macsec_del_dev(macsec);
3210 unregister_netdevice(dev);
3214 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[])
3216 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3217 u8 icv_len = DEFAULT_ICV_LEN;
3224 if (data[IFLA_MACSEC_CIPHER_SUITE])
3225 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3227 if (data[IFLA_MACSEC_ICV_LEN]) {
3228 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3229 if (icv_len != DEFAULT_ICV_LEN) {
3230 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3231 struct crypto_aead *dummy_tfm;
3233 dummy_tfm = macsec_alloc_tfm(dummy_key,
3236 if (IS_ERR(dummy_tfm))
3237 return PTR_ERR(dummy_tfm);
3238 crypto_free_aead(dummy_tfm);
3243 case MACSEC_DEFAULT_CIPHER_ID:
3244 case MACSEC_DEFAULT_CIPHER_ALT:
3245 if (icv_len < MACSEC_MIN_ICV_LEN ||
3246 icv_len > MACSEC_STD_ICV_LEN)
3253 if (data[IFLA_MACSEC_ENCODING_SA]) {
3254 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3258 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3259 flag < IFLA_MACSEC_VALIDATION;
3262 if (nla_get_u8(data[flag]) > 1)
3267 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3268 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3269 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3271 if ((sci && (scb || es)) || (scb && es))
3274 if (data[IFLA_MACSEC_VALIDATION] &&
3275 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3278 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3279 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3280 !data[IFLA_MACSEC_WINDOW])
3286 static struct net *macsec_get_link_net(const struct net_device *dev)
3288 return dev_net(macsec_priv(dev)->real_dev);
3291 static size_t macsec_get_size(const struct net_device *dev)
3294 nla_total_size_64bit(8) + /* SCI */
3295 nla_total_size(1) + /* ICV_LEN */
3296 nla_total_size_64bit(8) + /* CIPHER_SUITE */
3297 nla_total_size(4) + /* WINDOW */
3298 nla_total_size(1) + /* ENCODING_SA */
3299 nla_total_size(1) + /* ENCRYPT */
3300 nla_total_size(1) + /* PROTECT */
3301 nla_total_size(1) + /* INC_SCI */
3302 nla_total_size(1) + /* ES */
3303 nla_total_size(1) + /* SCB */
3304 nla_total_size(1) + /* REPLAY_PROTECT */
3305 nla_total_size(1) + /* VALIDATION */
3309 static int macsec_fill_info(struct sk_buff *skb,
3310 const struct net_device *dev)
3312 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3313 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3315 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3317 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3318 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3319 MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) ||
3320 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3321 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3322 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3323 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3324 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3325 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3326 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3327 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3329 goto nla_put_failure;
3331 if (secy->replay_protect) {
3332 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3333 goto nla_put_failure;
3342 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3344 .priv_size = sizeof(struct macsec_dev),
3345 .maxtype = IFLA_MACSEC_MAX,
3346 .policy = macsec_rtnl_policy,
3347 .setup = macsec_setup,
3348 .validate = macsec_validate_attr,
3349 .newlink = macsec_newlink,
3350 .changelink = macsec_changelink,
3351 .dellink = macsec_dellink,
3352 .get_size = macsec_get_size,
3353 .fill_info = macsec_fill_info,
3354 .get_link_net = macsec_get_link_net,
3357 static bool is_macsec_master(struct net_device *dev)
3359 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3362 static int macsec_notify(struct notifier_block *this, unsigned long event,
3365 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3368 if (!is_macsec_master(real_dev))
3372 case NETDEV_UNREGISTER: {
3373 struct macsec_dev *m, *n;
3374 struct macsec_rxh_data *rxd;
3376 rxd = macsec_data_rtnl(real_dev);
3377 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3378 macsec_dellink(m->secy.netdev, &head);
3380 unregister_netdevice_many(&head);
3383 case NETDEV_CHANGEMTU: {
3384 struct macsec_dev *m;
3385 struct macsec_rxh_data *rxd;
3387 rxd = macsec_data_rtnl(real_dev);
3388 list_for_each_entry(m, &rxd->secys, secys) {
3389 struct net_device *dev = m->secy.netdev;
3390 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3391 macsec_extra_len(true));
3394 dev_set_mtu(dev, mtu);
3402 static struct notifier_block macsec_notifier = {
3403 .notifier_call = macsec_notify,
3406 static int __init macsec_init(void)
3410 pr_info("MACsec IEEE 802.1AE\n");
3411 err = register_netdevice_notifier(&macsec_notifier);
3415 err = rtnl_link_register(&macsec_link_ops);
3419 err = genl_register_family_with_ops(&macsec_fam, macsec_genl_ops);
3426 rtnl_link_unregister(&macsec_link_ops);
3428 unregister_netdevice_notifier(&macsec_notifier);
3432 static void __exit macsec_exit(void)
3434 genl_unregister_family(&macsec_fam);
3435 rtnl_link_unregister(&macsec_link_ops);
3436 unregister_netdevice_notifier(&macsec_notifier);
3440 module_init(macsec_init);
3441 module_exit(macsec_exit);
3443 MODULE_ALIAS_RTNL_LINK("macsec");
3445 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3446 MODULE_LICENSE("GPL v2");