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>
22 #include <uapi/linux/if_macsec.h>
24 typedef u64 __bitwise sci_t;
26 #define MACSEC_SCI_LEN 8
28 /* SecTAG length = macsec_eth_header without the optional SCI */
29 #define MACSEC_TAG_LEN 6
31 struct macsec_eth_header {
35 #if defined(__LITTLE_ENDIAN_BITFIELD)
38 #elif defined(__BIG_ENDIAN_BITFIELD)
42 #error "Please fix <asm/byteorder.h>"
45 u8 secure_channel_id[8]; /* optional */
48 #define MACSEC_TCI_VERSION 0x80
49 #define MACSEC_TCI_ES 0x40 /* end station */
50 #define MACSEC_TCI_SC 0x20 /* SCI present */
51 #define MACSEC_TCI_SCB 0x10 /* epon */
52 #define MACSEC_TCI_E 0x08 /* encryption */
53 #define MACSEC_TCI_C 0x04 /* changed text */
54 #define MACSEC_AN_MASK 0x03 /* association number */
55 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
57 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
58 #define MIN_NON_SHORT_LEN 48
60 #define GCM_AES_IV_LEN 12
61 #define DEFAULT_ICV_LEN 16
63 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
65 #define for_each_rxsc(secy, sc) \
66 for (sc = rcu_dereference_bh(secy->rx_sc); \
68 sc = rcu_dereference_bh(sc->next))
69 #define for_each_rxsc_rtnl(secy, sc) \
70 for (sc = rtnl_dereference(secy->rx_sc); \
72 sc = rtnl_dereference(sc->next))
76 u8 secure_channel_id[8];
83 * struct macsec_key - SA key
84 * @id: user-provided key identifier
85 * @tfm: crypto struct, key storage
89 struct crypto_aead *tfm;
92 struct macsec_rx_sc_stats {
93 __u64 InOctetsValidated;
94 __u64 InOctetsDecrypted;
95 __u64 InPktsUnchecked;
100 __u64 InPktsNotValid;
101 __u64 InPktsNotUsingSA;
102 __u64 InPktsUnusedSA;
105 struct macsec_rx_sa_stats {
108 __u32 InPktsNotValid;
109 __u32 InPktsNotUsingSA;
110 __u32 InPktsUnusedSA;
113 struct macsec_tx_sa_stats {
114 __u32 OutPktsProtected;
115 __u32 OutPktsEncrypted;
118 struct macsec_tx_sc_stats {
119 __u64 OutPktsProtected;
120 __u64 OutPktsEncrypted;
121 __u64 OutOctetsProtected;
122 __u64 OutOctetsEncrypted;
125 struct macsec_dev_stats {
126 __u64 OutPktsUntagged;
127 __u64 InPktsUntagged;
128 __u64 OutPktsTooLong;
131 __u64 InPktsUnknownSCI;
137 * struct macsec_rx_sa - receive secure association
139 * @next_pn: packet number expected for the next packet
140 * @lock: protects next_pn manipulations
141 * @key: key structure
142 * @stats: per-SA stats
144 struct macsec_rx_sa {
145 struct macsec_key key;
150 struct macsec_rx_sa_stats __percpu *stats;
151 struct macsec_rx_sc *sc;
155 struct pcpu_rx_sc_stats {
156 struct macsec_rx_sc_stats stats;
157 struct u64_stats_sync syncp;
161 * struct macsec_rx_sc - receive secure channel
162 * @sci: secure channel identifier for this SC
163 * @active: channel is active
164 * @sa: array of secure associations
165 * @stats: per-SC stats
167 struct macsec_rx_sc {
168 struct macsec_rx_sc __rcu *next;
171 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
172 struct pcpu_rx_sc_stats __percpu *stats;
174 struct rcu_head rcu_head;
178 * struct macsec_tx_sa - transmit secure association
180 * @next_pn: packet number to use for the next packet
181 * @lock: protects next_pn manipulations
182 * @key: key structure
183 * @stats: per-SA stats
185 struct macsec_tx_sa {
186 struct macsec_key key;
191 struct macsec_tx_sa_stats __percpu *stats;
195 struct pcpu_tx_sc_stats {
196 struct macsec_tx_sc_stats stats;
197 struct u64_stats_sync syncp;
201 * struct macsec_tx_sc - transmit secure channel
203 * @encoding_sa: association number of the SA currently in use
204 * @encrypt: encrypt packets on transmit, or authenticate only
205 * @send_sci: always include the SCI in the SecTAG
207 * @scb: single copy broadcast flag
208 * @sa: array of secure associations
209 * @stats: stats for this TXSC
211 struct macsec_tx_sc {
218 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
219 struct pcpu_tx_sc_stats __percpu *stats;
222 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
225 * struct macsec_secy - MACsec Security Entity
226 * @netdev: netdevice for this SecY
227 * @n_rx_sc: number of receive secure channels configured on this SecY
228 * @sci: secure channel identifier used for tx
229 * @key_len: length of keys used by the cipher suite
230 * @icv_len: length of ICV used by the cipher suite
231 * @validate_frames: validation mode
232 * @operational: MAC_Operational flag
233 * @protect_frames: enable protection for this SecY
234 * @replay_protect: enable packet number checks on receive
235 * @replay_window: size of the replay window
236 * @tx_sc: transmit secure channel
237 * @rx_sc: linked list of receive secure channels
240 struct net_device *netdev;
241 unsigned int n_rx_sc;
245 enum macsec_validation_type validate_frames;
250 struct macsec_tx_sc tx_sc;
251 struct macsec_rx_sc __rcu *rx_sc;
254 struct pcpu_secy_stats {
255 struct macsec_dev_stats stats;
256 struct u64_stats_sync syncp;
260 * struct macsec_dev - private data
262 * @real_dev: pointer to underlying netdevice
263 * @stats: MACsec device stats
264 * @secys: linked list of SecY's on the underlying device
267 struct macsec_secy secy;
268 struct net_device *real_dev;
269 struct pcpu_secy_stats __percpu *stats;
270 struct list_head secys;
274 * struct macsec_rxh_data - rx_handler private argument
275 * @secys: linked list of SecY's on this underlying device
277 struct macsec_rxh_data {
278 struct list_head secys;
281 static struct macsec_dev *macsec_priv(const struct net_device *dev)
283 return (struct macsec_dev *)netdev_priv(dev);
286 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
288 return rcu_dereference_bh(dev->rx_handler_data);
291 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
293 return rtnl_dereference(dev->rx_handler_data);
297 struct aead_request *req;
299 struct macsec_tx_sa *tx_sa;
300 struct macsec_rx_sa *rx_sa;
307 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
309 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
311 if (!sa || !sa->active)
314 if (!atomic_inc_not_zero(&sa->refcnt))
320 static void free_rx_sc_rcu(struct rcu_head *head)
322 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
324 free_percpu(rx_sc->stats);
328 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
330 return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL;
333 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
335 if (atomic_dec_and_test(&sc->refcnt))
336 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
339 static void free_rxsa(struct rcu_head *head)
341 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
343 crypto_free_aead(sa->key.tfm);
344 free_percpu(sa->stats);
345 macsec_rxsc_put(sa->sc);
349 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
351 if (atomic_dec_and_test(&sa->refcnt))
352 call_rcu(&sa->rcu, free_rxsa);
355 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
357 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
359 if (!sa || !sa->active)
362 if (!atomic_inc_not_zero(&sa->refcnt))
368 static void free_txsa(struct rcu_head *head)
370 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
372 crypto_free_aead(sa->key.tfm);
373 free_percpu(sa->stats);
377 static void macsec_txsa_put(struct macsec_tx_sa *sa)
379 if (atomic_dec_and_test(&sa->refcnt))
380 call_rcu(&sa->rcu, free_txsa);
383 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
385 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
386 return (struct macsec_cb *)skb->cb;
389 #define MACSEC_PORT_ES (htons(0x0001))
390 #define MACSEC_PORT_SCB (0x0000)
391 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
393 #define DEFAULT_SAK_LEN 16
394 #define DEFAULT_SEND_SCI true
395 #define DEFAULT_ENCRYPT false
396 #define DEFAULT_ENCODING_SA 0
398 static sci_t make_sci(u8 *addr, __be16 port)
402 memcpy(&sci, addr, ETH_ALEN);
403 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
408 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
413 memcpy(&sci, hdr->secure_channel_id,
414 sizeof(hdr->secure_channel_id));
416 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
421 static unsigned int macsec_sectag_len(bool sci_present)
423 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
426 static unsigned int macsec_hdr_len(bool sci_present)
428 return macsec_sectag_len(sci_present) + ETH_HLEN;
431 static unsigned int macsec_extra_len(bool sci_present)
433 return macsec_sectag_len(sci_present) + sizeof(__be16);
436 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
437 static void macsec_fill_sectag(struct macsec_eth_header *h,
438 const struct macsec_secy *secy, u32 pn)
440 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
442 memset(&h->tci_an, 0, macsec_sectag_len(tx_sc->send_sci));
443 h->eth.h_proto = htons(ETH_P_MACSEC);
445 if (tx_sc->send_sci ||
446 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb)) {
447 h->tci_an |= MACSEC_TCI_SC;
448 memcpy(&h->secure_channel_id, &secy->sci,
449 sizeof(h->secure_channel_id));
451 if (tx_sc->end_station)
452 h->tci_an |= MACSEC_TCI_ES;
454 h->tci_an |= MACSEC_TCI_SCB;
457 h->packet_number = htonl(pn);
459 /* with GCM, C/E clear for !encrypt, both set for encrypt */
461 h->tci_an |= MACSEC_TCI_CONFID;
462 else if (secy->icv_len != DEFAULT_ICV_LEN)
463 h->tci_an |= MACSEC_TCI_C;
465 h->tci_an |= tx_sc->encoding_sa;
468 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
470 if (data_len < MIN_NON_SHORT_LEN)
471 h->short_length = data_len;
474 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
475 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
477 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
478 int len = skb->len - 2 * ETH_ALEN;
479 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
481 /* a) It comprises at least 17 octets */
485 /* b) MACsec EtherType: already checked */
487 /* c) V bit is clear */
488 if (h->tci_an & MACSEC_TCI_VERSION)
491 /* d) ES or SCB => !SC */
492 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
493 (h->tci_an & MACSEC_TCI_SC))
496 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
500 /* rx.pn != 0 (figure 10-5) */
501 if (!h->packet_number)
504 /* length check, f) g) h) i) */
506 return len == extra_len + h->short_length;
507 return len >= extra_len + MIN_NON_SHORT_LEN;
510 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
511 #define MACSEC_NEEDED_TAILROOM MACSEC_MAX_ICV_LEN
513 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
515 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
518 gcm_iv->pn = htonl(pn);
521 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
523 return (struct macsec_eth_header *)skb_mac_header(skb);
526 static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
530 spin_lock_bh(&tx_sa->lock);
534 if (tx_sa->next_pn == 0) {
535 pr_debug("PN wrapped, transitioning to !oper\n");
536 tx_sa->active = false;
537 if (secy->protect_frames)
538 secy->operational = false;
540 spin_unlock_bh(&tx_sa->lock);
545 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
547 struct macsec_dev *macsec = netdev_priv(dev);
549 skb->dev = macsec->real_dev;
550 skb_reset_mac_header(skb);
551 skb->protocol = eth_hdr(skb)->h_proto;
554 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
555 struct macsec_tx_sa *tx_sa)
557 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
559 u64_stats_update_begin(&txsc_stats->syncp);
560 if (tx_sc->encrypt) {
561 txsc_stats->stats.OutOctetsEncrypted += skb->len;
562 txsc_stats->stats.OutPktsEncrypted++;
563 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
565 txsc_stats->stats.OutOctetsProtected += skb->len;
566 txsc_stats->stats.OutPktsProtected++;
567 this_cpu_inc(tx_sa->stats->OutPktsProtected);
569 u64_stats_update_end(&txsc_stats->syncp);
572 static void count_tx(struct net_device *dev, int ret, int len)
574 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
575 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
577 u64_stats_update_begin(&stats->syncp);
579 stats->tx_bytes += len;
580 u64_stats_update_end(&stats->syncp);
582 dev->stats.tx_dropped++;
586 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
588 struct sk_buff *skb = base->data;
589 struct net_device *dev = skb->dev;
590 struct macsec_dev *macsec = macsec_priv(dev);
591 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
594 aead_request_free(macsec_skb_cb(skb)->req);
597 macsec_encrypt_finish(skb, dev);
598 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
600 ret = dev_queue_xmit(skb);
601 count_tx(dev, ret, len);
602 rcu_read_unlock_bh();
608 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
609 struct net_device *dev)
612 struct scatterlist sg[MAX_SKB_FRAGS + 1];
613 unsigned char iv[GCM_AES_IV_LEN];
615 struct macsec_eth_header *hh;
616 size_t unprotected_len;
617 struct aead_request *req;
618 struct macsec_secy *secy;
619 struct macsec_tx_sc *tx_sc;
620 struct macsec_tx_sa *tx_sa;
621 struct macsec_dev *macsec = macsec_priv(dev);
624 secy = &macsec->secy;
625 tx_sc = &secy->tx_sc;
627 /* 10.5.1 TX SA assignment */
628 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
630 secy->operational = false;
632 return ERR_PTR(-EINVAL);
635 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
636 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
637 struct sk_buff *nskb = skb_copy_expand(skb,
638 MACSEC_NEEDED_HEADROOM,
639 MACSEC_NEEDED_TAILROOM,
645 macsec_txsa_put(tx_sa);
647 return ERR_PTR(-ENOMEM);
650 skb = skb_unshare(skb, GFP_ATOMIC);
652 macsec_txsa_put(tx_sa);
653 return ERR_PTR(-ENOMEM);
657 unprotected_len = skb->len;
659 hh = (struct macsec_eth_header *)skb_push(skb, macsec_extra_len(tx_sc->send_sci));
660 memmove(hh, eth, 2 * ETH_ALEN);
662 pn = tx_sa_update_pn(tx_sa, secy);
664 macsec_txsa_put(tx_sa);
666 return ERR_PTR(-ENOLINK);
668 macsec_fill_sectag(hh, secy, pn);
669 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
671 macsec_fill_iv(iv, secy->sci, pn);
673 skb_put(skb, secy->icv_len);
675 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
676 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
678 u64_stats_update_begin(&secy_stats->syncp);
679 secy_stats->stats.OutPktsTooLong++;
680 u64_stats_update_end(&secy_stats->syncp);
682 macsec_txsa_put(tx_sa);
684 return ERR_PTR(-EINVAL);
687 req = aead_request_alloc(tx_sa->key.tfm, GFP_ATOMIC);
689 macsec_txsa_put(tx_sa);
691 return ERR_PTR(-ENOMEM);
694 sg_init_table(sg, MAX_SKB_FRAGS + 1);
695 skb_to_sgvec(skb, sg, 0, skb->len);
697 if (tx_sc->encrypt) {
698 int len = skb->len - macsec_hdr_len(tx_sc->send_sci) -
700 aead_request_set_crypt(req, sg, sg, len, iv);
701 aead_request_set_ad(req, macsec_hdr_len(tx_sc->send_sci));
703 aead_request_set_crypt(req, sg, sg, 0, iv);
704 aead_request_set_ad(req, skb->len - secy->icv_len);
707 macsec_skb_cb(skb)->req = req;
708 macsec_skb_cb(skb)->tx_sa = tx_sa;
709 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
712 ret = crypto_aead_encrypt(req);
713 if (ret == -EINPROGRESS) {
715 } else if (ret != 0) {
718 aead_request_free(req);
719 macsec_txsa_put(tx_sa);
720 return ERR_PTR(-EINVAL);
724 aead_request_free(req);
725 macsec_txsa_put(tx_sa);
730 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
732 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
733 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
734 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
737 spin_lock(&rx_sa->lock);
738 if (rx_sa->next_pn >= secy->replay_window)
739 lowest_pn = rx_sa->next_pn - secy->replay_window;
741 /* Now perform replay protection check again
742 * (see IEEE 802.1AE-2006 figure 10-5)
744 if (secy->replay_protect && pn < lowest_pn) {
745 spin_unlock(&rx_sa->lock);
746 u64_stats_update_begin(&rxsc_stats->syncp);
747 rxsc_stats->stats.InPktsLate++;
748 u64_stats_update_end(&rxsc_stats->syncp);
752 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
753 u64_stats_update_begin(&rxsc_stats->syncp);
754 if (hdr->tci_an & MACSEC_TCI_E)
755 rxsc_stats->stats.InOctetsDecrypted += skb->len;
757 rxsc_stats->stats.InOctetsValidated += skb->len;
758 u64_stats_update_end(&rxsc_stats->syncp);
761 if (!macsec_skb_cb(skb)->valid) {
762 spin_unlock(&rx_sa->lock);
765 if (hdr->tci_an & MACSEC_TCI_C ||
766 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
767 u64_stats_update_begin(&rxsc_stats->syncp);
768 rxsc_stats->stats.InPktsNotValid++;
769 u64_stats_update_end(&rxsc_stats->syncp);
773 u64_stats_update_begin(&rxsc_stats->syncp);
774 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
775 rxsc_stats->stats.InPktsInvalid++;
776 this_cpu_inc(rx_sa->stats->InPktsInvalid);
777 } else if (pn < lowest_pn) {
778 rxsc_stats->stats.InPktsDelayed++;
780 rxsc_stats->stats.InPktsUnchecked++;
782 u64_stats_update_end(&rxsc_stats->syncp);
784 u64_stats_update_begin(&rxsc_stats->syncp);
785 if (pn < lowest_pn) {
786 rxsc_stats->stats.InPktsDelayed++;
788 rxsc_stats->stats.InPktsOK++;
789 this_cpu_inc(rx_sa->stats->InPktsOK);
791 u64_stats_update_end(&rxsc_stats->syncp);
793 if (pn >= rx_sa->next_pn)
794 rx_sa->next_pn = pn + 1;
795 spin_unlock(&rx_sa->lock);
801 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
803 skb->pkt_type = PACKET_HOST;
804 skb->protocol = eth_type_trans(skb, dev);
806 skb_reset_network_header(skb);
807 if (!skb_transport_header_was_set(skb))
808 skb_reset_transport_header(skb);
809 skb_reset_mac_len(skb);
812 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
814 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
815 skb_pull(skb, hdr_len);
816 pskb_trim_unique(skb, skb->len - icv_len);
819 static void count_rx(struct net_device *dev, int len)
821 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
823 u64_stats_update_begin(&stats->syncp);
825 stats->rx_bytes += len;
826 u64_stats_update_end(&stats->syncp);
829 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
831 struct sk_buff *skb = base->data;
832 struct net_device *dev = skb->dev;
833 struct macsec_dev *macsec = macsec_priv(dev);
834 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
838 aead_request_free(macsec_skb_cb(skb)->req);
841 pn = ntohl(macsec_ethhdr(skb)->packet_number);
842 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
843 rcu_read_unlock_bh();
848 macsec_finalize_skb(skb, macsec->secy.icv_len,
849 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
850 macsec_reset_skb(skb, macsec->secy.netdev);
854 if (ret == NET_RX_SUCCESS)
857 macsec->secy.netdev->stats.rx_dropped++;
859 rcu_read_unlock_bh();
862 macsec_rxsa_put(rx_sa);
867 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
868 struct net_device *dev,
869 struct macsec_rx_sa *rx_sa,
871 struct macsec_secy *secy)
874 struct scatterlist sg[MAX_SKB_FRAGS + 1];
875 unsigned char iv[GCM_AES_IV_LEN];
876 struct aead_request *req;
877 struct macsec_eth_header *hdr;
878 u16 icv_len = secy->icv_len;
880 macsec_skb_cb(skb)->valid = false;
881 skb = skb_share_check(skb, GFP_ATOMIC);
883 return ERR_PTR(-ENOMEM);
885 req = aead_request_alloc(rx_sa->key.tfm, GFP_ATOMIC);
888 return ERR_PTR(-ENOMEM);
891 hdr = (struct macsec_eth_header *)skb->data;
892 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
894 sg_init_table(sg, MAX_SKB_FRAGS + 1);
895 skb_to_sgvec(skb, sg, 0, skb->len);
897 if (hdr->tci_an & MACSEC_TCI_E) {
898 /* confidentiality: ethernet + macsec header
899 * authenticated, encrypted payload
901 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
903 aead_request_set_crypt(req, sg, sg, len, iv);
904 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
905 skb = skb_unshare(skb, GFP_ATOMIC);
907 aead_request_free(req);
908 return ERR_PTR(-ENOMEM);
911 /* integrity only: all headers + data authenticated */
912 aead_request_set_crypt(req, sg, sg, icv_len, iv);
913 aead_request_set_ad(req, skb->len - icv_len);
916 macsec_skb_cb(skb)->req = req;
917 macsec_skb_cb(skb)->rx_sa = rx_sa;
919 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
922 ret = crypto_aead_decrypt(req);
923 if (ret == -EINPROGRESS) {
925 } else if (ret != 0) {
926 /* decryption/authentication failed
927 * 10.6 if validateFrames is disabled, deliver anyway
929 if (ret != -EBADMSG) {
934 macsec_skb_cb(skb)->valid = true;
938 aead_request_free(req);
943 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
945 struct macsec_rx_sc *rx_sc;
947 for_each_rxsc(secy, rx_sc) {
948 if (rx_sc->sci == sci)
955 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
957 struct macsec_rx_sc *rx_sc;
959 for_each_rxsc_rtnl(secy, rx_sc) {
960 if (rx_sc->sci == sci)
967 static void handle_not_macsec(struct sk_buff *skb)
969 struct macsec_rxh_data *rxd;
970 struct macsec_dev *macsec;
973 rxd = macsec_data_rcu(skb->dev);
975 /* 10.6 If the management control validateFrames is not
976 * Strict, frames without a SecTAG are received, counted, and
977 * delivered to the Controlled Port
979 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
980 struct sk_buff *nskb;
982 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
984 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
985 u64_stats_update_begin(&secy_stats->syncp);
986 secy_stats->stats.InPktsNoTag++;
987 u64_stats_update_end(&secy_stats->syncp);
991 /* deliver on this port */
992 nskb = skb_clone(skb, GFP_ATOMIC);
996 nskb->dev = macsec->secy.netdev;
998 ret = netif_rx(nskb);
999 if (ret == NET_RX_SUCCESS) {
1000 u64_stats_update_begin(&secy_stats->syncp);
1001 secy_stats->stats.InPktsUntagged++;
1002 u64_stats_update_end(&secy_stats->syncp);
1004 macsec->secy.netdev->stats.rx_dropped++;
1011 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1013 struct sk_buff *skb = *pskb;
1014 struct net_device *dev = skb->dev;
1015 struct macsec_eth_header *hdr;
1016 struct macsec_secy *secy = NULL;
1017 struct macsec_rx_sc *rx_sc;
1018 struct macsec_rx_sa *rx_sa;
1019 struct macsec_rxh_data *rxd;
1020 struct macsec_dev *macsec;
1024 struct pcpu_rx_sc_stats *rxsc_stats;
1025 struct pcpu_secy_stats *secy_stats;
1028 if (skb_headroom(skb) < ETH_HLEN)
1031 hdr = macsec_ethhdr(skb);
1032 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1033 handle_not_macsec(skb);
1035 /* and deliver to the uncontrolled port */
1036 return RX_HANDLER_PASS;
1039 skb = skb_unshare(skb, GFP_ATOMIC);
1042 return RX_HANDLER_CONSUMED;
1045 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1047 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1051 hdr = macsec_ethhdr(skb);
1053 /* Frames with a SecTAG that has the TCI E bit set but the C
1054 * bit clear are discarded, as this reserved encoding is used
1055 * to identify frames with a SecTAG that are not to be
1056 * delivered to the Controlled Port.
1058 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1059 return RX_HANDLER_PASS;
1061 /* now, pull the extra length */
1062 if (hdr->tci_an & MACSEC_TCI_SC) {
1067 /* ethernet header is part of crypto processing */
1068 skb_push(skb, ETH_HLEN);
1070 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1071 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1072 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1075 rxd = macsec_data_rcu(skb->dev);
1077 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1078 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1081 secy = &macsec->secy;
1091 macsec = macsec_priv(dev);
1092 secy_stats = this_cpu_ptr(macsec->stats);
1093 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1095 if (!macsec_validate_skb(skb, secy->icv_len)) {
1096 u64_stats_update_begin(&secy_stats->syncp);
1097 secy_stats->stats.InPktsBadTag++;
1098 u64_stats_update_end(&secy_stats->syncp);
1102 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1104 /* 10.6.1 if the SA is not in use */
1106 /* If validateFrames is Strict or the C bit in the
1107 * SecTAG is set, discard
1109 if (hdr->tci_an & MACSEC_TCI_C ||
1110 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1111 u64_stats_update_begin(&rxsc_stats->syncp);
1112 rxsc_stats->stats.InPktsNotUsingSA++;
1113 u64_stats_update_end(&rxsc_stats->syncp);
1117 /* not Strict, the frame (with the SecTAG and ICV
1118 * removed) is delivered to the Controlled Port.
1120 u64_stats_update_begin(&rxsc_stats->syncp);
1121 rxsc_stats->stats.InPktsUnusedSA++;
1122 u64_stats_update_end(&rxsc_stats->syncp);
1126 /* First, PN check to avoid decrypting obviously wrong packets */
1127 pn = ntohl(hdr->packet_number);
1128 if (secy->replay_protect) {
1131 spin_lock(&rx_sa->lock);
1132 late = rx_sa->next_pn >= secy->replay_window &&
1133 pn < (rx_sa->next_pn - secy->replay_window);
1134 spin_unlock(&rx_sa->lock);
1137 u64_stats_update_begin(&rxsc_stats->syncp);
1138 rxsc_stats->stats.InPktsLate++;
1139 u64_stats_update_end(&rxsc_stats->syncp);
1144 /* Disabled && !changed text => skip validation */
1145 if (hdr->tci_an & MACSEC_TCI_C ||
1146 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1147 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1150 /* the decrypt callback needs the reference */
1151 if (PTR_ERR(skb) != -EINPROGRESS)
1152 macsec_rxsa_put(rx_sa);
1155 return RX_HANDLER_CONSUMED;
1158 if (!macsec_post_decrypt(skb, secy, pn))
1162 macsec_finalize_skb(skb, secy->icv_len,
1163 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1164 macsec_reset_skb(skb, secy->netdev);
1167 macsec_rxsa_put(rx_sa);
1168 count_rx(dev, skb->len);
1173 return RX_HANDLER_ANOTHER;
1176 macsec_rxsa_put(rx_sa);
1182 return RX_HANDLER_CONSUMED;
1185 /* 10.6.1 if the SC is not found */
1186 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1188 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1189 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1191 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1192 struct sk_buff *nskb;
1195 secy_stats = this_cpu_ptr(macsec->stats);
1197 /* If validateFrames is Strict or the C bit in the
1198 * SecTAG is set, discard
1201 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1202 u64_stats_update_begin(&secy_stats->syncp);
1203 secy_stats->stats.InPktsNoSCI++;
1204 u64_stats_update_end(&secy_stats->syncp);
1208 /* not strict, the frame (with the SecTAG and ICV
1209 * removed) is delivered to the Controlled Port.
1211 nskb = skb_clone(skb, GFP_ATOMIC);
1215 macsec_reset_skb(nskb, macsec->secy.netdev);
1217 ret = netif_rx(nskb);
1218 if (ret == NET_RX_SUCCESS) {
1219 u64_stats_update_begin(&secy_stats->syncp);
1220 secy_stats->stats.InPktsUnknownSCI++;
1221 u64_stats_update_end(&secy_stats->syncp);
1223 macsec->secy.netdev->stats.rx_dropped++;
1229 return RX_HANDLER_PASS;
1232 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1234 struct crypto_aead *tfm;
1237 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1238 if (!tfm || IS_ERR(tfm))
1241 ret = crypto_aead_setkey(tfm, key, key_len);
1243 crypto_free_aead(tfm);
1247 ret = crypto_aead_setauthsize(tfm, icv_len);
1249 crypto_free_aead(tfm);
1256 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1259 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1263 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1264 if (!rx_sa->key.tfm) {
1265 free_percpu(rx_sa->stats);
1269 rx_sa->active = false;
1271 atomic_set(&rx_sa->refcnt, 1);
1272 spin_lock_init(&rx_sa->lock);
1277 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1279 rx_sa->active = false;
1281 macsec_rxsa_put(rx_sa);
1284 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1288 for (i = 0; i < MACSEC_NUM_AN; i++) {
1289 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1291 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1296 macsec_rxsc_put(rx_sc);
1299 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1301 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1303 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1305 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1306 if (rx_sc->sci == sci) {
1309 rcu_assign_pointer(*rx_scp, rx_sc->next);
1317 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1319 struct macsec_rx_sc *rx_sc;
1320 struct macsec_dev *macsec;
1321 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1322 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1323 struct macsec_secy *secy;
1325 list_for_each_entry(macsec, &rxd->secys, secys) {
1326 if (find_rx_sc_rtnl(&macsec->secy, sci))
1327 return ERR_PTR(-EEXIST);
1330 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1332 return ERR_PTR(-ENOMEM);
1334 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1335 if (!rx_sc->stats) {
1337 return ERR_PTR(-ENOMEM);
1341 rx_sc->active = true;
1342 atomic_set(&rx_sc->refcnt, 1);
1344 secy = &macsec_priv(dev)->secy;
1345 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1346 rcu_assign_pointer(secy->rx_sc, rx_sc);
1354 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1357 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1361 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1362 if (!tx_sa->key.tfm) {
1363 free_percpu(tx_sa->stats);
1367 tx_sa->active = false;
1368 atomic_set(&tx_sa->refcnt, 1);
1369 spin_lock_init(&tx_sa->lock);
1374 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1376 tx_sa->active = false;
1378 macsec_txsa_put(tx_sa);
1381 static struct genl_family macsec_fam = {
1382 .id = GENL_ID_GENERATE,
1383 .name = MACSEC_GENL_NAME,
1385 .version = MACSEC_GENL_VERSION,
1386 .maxattr = MACSEC_ATTR_MAX,
1390 static struct net_device *get_dev_from_nl(struct net *net,
1391 struct nlattr **attrs)
1393 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1394 struct net_device *dev;
1396 dev = __dev_get_by_index(net, ifindex);
1398 return ERR_PTR(-ENODEV);
1400 if (!netif_is_macsec(dev))
1401 return ERR_PTR(-ENODEV);
1406 static sci_t nla_get_sci(const struct nlattr *nla)
1408 return (__force sci_t)nla_get_u64(nla);
1411 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value)
1413 return nla_put_u64(skb, attrtype, (__force u64)value);
1416 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1417 struct nlattr **attrs,
1418 struct nlattr **tb_sa,
1419 struct net_device **devp,
1420 struct macsec_secy **secyp,
1421 struct macsec_tx_sc **scp,
1424 struct net_device *dev;
1425 struct macsec_secy *secy;
1426 struct macsec_tx_sc *tx_sc;
1427 struct macsec_tx_sa *tx_sa;
1429 if (!tb_sa[MACSEC_SA_ATTR_AN])
1430 return ERR_PTR(-EINVAL);
1432 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1434 dev = get_dev_from_nl(net, attrs);
1436 return ERR_CAST(dev);
1438 if (*assoc_num >= MACSEC_NUM_AN)
1439 return ERR_PTR(-EINVAL);
1441 secy = &macsec_priv(dev)->secy;
1442 tx_sc = &secy->tx_sc;
1444 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1446 return ERR_PTR(-ENODEV);
1454 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1455 struct nlattr **attrs,
1456 struct nlattr **tb_rxsc,
1457 struct net_device **devp,
1458 struct macsec_secy **secyp)
1460 struct net_device *dev;
1461 struct macsec_secy *secy;
1462 struct macsec_rx_sc *rx_sc;
1465 dev = get_dev_from_nl(net, attrs);
1467 return ERR_CAST(dev);
1469 secy = &macsec_priv(dev)->secy;
1471 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1472 return ERR_PTR(-EINVAL);
1474 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1475 rx_sc = find_rx_sc_rtnl(secy, sci);
1477 return ERR_PTR(-ENODEV);
1485 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1486 struct nlattr **attrs,
1487 struct nlattr **tb_rxsc,
1488 struct nlattr **tb_sa,
1489 struct net_device **devp,
1490 struct macsec_secy **secyp,
1491 struct macsec_rx_sc **scp,
1494 struct macsec_rx_sc *rx_sc;
1495 struct macsec_rx_sa *rx_sa;
1497 if (!tb_sa[MACSEC_SA_ATTR_AN])
1498 return ERR_PTR(-EINVAL);
1500 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1501 if (*assoc_num >= MACSEC_NUM_AN)
1502 return ERR_PTR(-EINVAL);
1504 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1506 return ERR_CAST(rx_sc);
1508 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1510 return ERR_PTR(-ENODEV);
1517 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1518 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1519 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1520 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1523 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1524 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1525 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1528 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1529 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1530 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1531 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1532 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_U64 },
1533 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1534 .len = MACSEC_MAX_KEY_LEN, },
1537 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1539 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1542 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG],
1543 macsec_genl_sa_policy))
1549 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1551 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1554 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG],
1555 macsec_genl_rxsc_policy))
1561 static bool validate_add_rxsa(struct nlattr **attrs)
1563 if (!attrs[MACSEC_SA_ATTR_AN] ||
1564 !attrs[MACSEC_SA_ATTR_KEY] ||
1565 !attrs[MACSEC_SA_ATTR_KEYID])
1568 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1571 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1574 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1575 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1582 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1584 struct net_device *dev;
1585 struct nlattr **attrs = info->attrs;
1586 struct macsec_secy *secy;
1587 struct macsec_rx_sc *rx_sc;
1588 struct macsec_rx_sa *rx_sa;
1589 unsigned char assoc_num;
1590 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1591 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1593 if (!attrs[MACSEC_ATTR_IFINDEX])
1596 if (parse_sa_config(attrs, tb_sa))
1599 if (parse_rxsc_config(attrs, tb_rxsc))
1602 if (!validate_add_rxsa(tb_sa))
1606 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1607 if (IS_ERR(rx_sc) || !macsec_rxsc_get(rx_sc)) {
1609 return PTR_ERR(rx_sc);
1612 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1614 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1615 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1616 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1621 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1627 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1628 if (!rx_sa || init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1629 secy->key_len, secy->icv_len)) {
1635 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1636 spin_lock_bh(&rx_sa->lock);
1637 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1638 spin_unlock_bh(&rx_sa->lock);
1641 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1642 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1644 rx_sa->key.id = nla_get_u64(tb_sa[MACSEC_SA_ATTR_KEYID]);
1646 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1653 static bool validate_add_rxsc(struct nlattr **attrs)
1655 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1658 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1659 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1666 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1668 struct net_device *dev;
1669 sci_t sci = MACSEC_UNDEF_SCI;
1670 struct nlattr **attrs = info->attrs;
1671 struct macsec_rx_sc *rx_sc;
1672 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1674 if (!attrs[MACSEC_ATTR_IFINDEX])
1677 if (parse_rxsc_config(attrs, tb_rxsc))
1680 if (!validate_add_rxsc(tb_rxsc))
1684 dev = get_dev_from_nl(genl_info_net(info), attrs);
1687 return PTR_ERR(dev);
1690 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1692 rx_sc = create_rx_sc(dev, sci);
1693 if (IS_ERR(rx_sc)) {
1695 return PTR_ERR(rx_sc);
1698 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1699 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1706 static bool validate_add_txsa(struct nlattr **attrs)
1708 if (!attrs[MACSEC_SA_ATTR_AN] ||
1709 !attrs[MACSEC_SA_ATTR_PN] ||
1710 !attrs[MACSEC_SA_ATTR_KEY] ||
1711 !attrs[MACSEC_SA_ATTR_KEYID])
1714 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1717 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1720 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1721 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1728 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1730 struct net_device *dev;
1731 struct nlattr **attrs = info->attrs;
1732 struct macsec_secy *secy;
1733 struct macsec_tx_sc *tx_sc;
1734 struct macsec_tx_sa *tx_sa;
1735 unsigned char assoc_num;
1736 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1738 if (!attrs[MACSEC_ATTR_IFINDEX])
1741 if (parse_sa_config(attrs, tb_sa))
1744 if (!validate_add_txsa(tb_sa))
1748 dev = get_dev_from_nl(genl_info_net(info), attrs);
1751 return PTR_ERR(dev);
1754 secy = &macsec_priv(dev)->secy;
1755 tx_sc = &secy->tx_sc;
1757 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1759 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1760 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1761 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1766 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1772 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1773 if (!tx_sa || init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1774 secy->key_len, secy->icv_len)) {
1780 tx_sa->key.id = nla_get_u64(tb_sa[MACSEC_SA_ATTR_KEYID]);
1782 spin_lock_bh(&tx_sa->lock);
1783 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1784 spin_unlock_bh(&tx_sa->lock);
1786 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1787 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1789 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1790 secy->operational = true;
1792 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1799 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1801 struct nlattr **attrs = info->attrs;
1802 struct net_device *dev;
1803 struct macsec_secy *secy;
1804 struct macsec_rx_sc *rx_sc;
1805 struct macsec_rx_sa *rx_sa;
1807 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1808 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1810 if (!attrs[MACSEC_ATTR_IFINDEX])
1813 if (parse_sa_config(attrs, tb_sa))
1816 if (parse_rxsc_config(attrs, tb_rxsc))
1820 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1821 &dev, &secy, &rx_sc, &assoc_num);
1822 if (IS_ERR(rx_sa)) {
1824 return PTR_ERR(rx_sa);
1827 if (rx_sa->active) {
1832 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1840 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1842 struct nlattr **attrs = info->attrs;
1843 struct net_device *dev;
1844 struct macsec_secy *secy;
1845 struct macsec_rx_sc *rx_sc;
1847 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1849 if (!attrs[MACSEC_ATTR_IFINDEX])
1852 if (parse_rxsc_config(attrs, tb_rxsc))
1855 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1859 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1862 return PTR_ERR(dev);
1865 secy = &macsec_priv(dev)->secy;
1866 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1868 rx_sc = del_rx_sc(secy, sci);
1880 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1882 struct nlattr **attrs = info->attrs;
1883 struct net_device *dev;
1884 struct macsec_secy *secy;
1885 struct macsec_tx_sc *tx_sc;
1886 struct macsec_tx_sa *tx_sa;
1888 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1890 if (!attrs[MACSEC_ATTR_IFINDEX])
1893 if (parse_sa_config(attrs, tb_sa))
1897 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1898 &dev, &secy, &tx_sc, &assoc_num);
1899 if (IS_ERR(tx_sa)) {
1901 return PTR_ERR(tx_sa);
1904 if (tx_sa->active) {
1909 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
1917 static bool validate_upd_sa(struct nlattr **attrs)
1919 if (!attrs[MACSEC_SA_ATTR_AN] ||
1920 attrs[MACSEC_SA_ATTR_KEY] ||
1921 attrs[MACSEC_SA_ATTR_KEYID])
1924 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1927 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1930 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1931 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1938 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
1940 struct nlattr **attrs = info->attrs;
1941 struct net_device *dev;
1942 struct macsec_secy *secy;
1943 struct macsec_tx_sc *tx_sc;
1944 struct macsec_tx_sa *tx_sa;
1946 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1948 if (!attrs[MACSEC_ATTR_IFINDEX])
1951 if (parse_sa_config(attrs, tb_sa))
1954 if (!validate_upd_sa(tb_sa))
1958 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1959 &dev, &secy, &tx_sc, &assoc_num);
1960 if (IS_ERR(tx_sa)) {
1962 return PTR_ERR(tx_sa);
1965 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1966 spin_lock_bh(&tx_sa->lock);
1967 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1968 spin_unlock_bh(&tx_sa->lock);
1971 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1972 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1974 if (assoc_num == tx_sc->encoding_sa)
1975 secy->operational = tx_sa->active;
1982 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
1984 struct nlattr **attrs = info->attrs;
1985 struct net_device *dev;
1986 struct macsec_secy *secy;
1987 struct macsec_rx_sc *rx_sc;
1988 struct macsec_rx_sa *rx_sa;
1990 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1991 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1993 if (!attrs[MACSEC_ATTR_IFINDEX])
1996 if (parse_rxsc_config(attrs, tb_rxsc))
1999 if (parse_sa_config(attrs, tb_sa))
2002 if (!validate_upd_sa(tb_sa))
2006 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2007 &dev, &secy, &rx_sc, &assoc_num);
2008 if (IS_ERR(rx_sa)) {
2010 return PTR_ERR(rx_sa);
2013 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2014 spin_lock_bh(&rx_sa->lock);
2015 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2016 spin_unlock_bh(&rx_sa->lock);
2019 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2020 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2026 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2028 struct nlattr **attrs = info->attrs;
2029 struct net_device *dev;
2030 struct macsec_secy *secy;
2031 struct macsec_rx_sc *rx_sc;
2032 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2034 if (!attrs[MACSEC_ATTR_IFINDEX])
2037 if (parse_rxsc_config(attrs, tb_rxsc))
2040 if (!validate_add_rxsc(tb_rxsc))
2044 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2045 if (IS_ERR(rx_sc)) {
2047 return PTR_ERR(rx_sc);
2050 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2051 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2053 if (rx_sc->active != new)
2054 secy->n_rx_sc += new ? 1 : -1;
2056 rx_sc->active = new;
2064 static int copy_tx_sa_stats(struct sk_buff *skb,
2065 struct macsec_tx_sa_stats __percpu *pstats)
2067 struct macsec_tx_sa_stats sum = {0, };
2070 for_each_possible_cpu(cpu) {
2071 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2073 sum.OutPktsProtected += stats->OutPktsProtected;
2074 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2077 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2078 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2084 static int copy_rx_sa_stats(struct sk_buff *skb,
2085 struct macsec_rx_sa_stats __percpu *pstats)
2087 struct macsec_rx_sa_stats sum = {0, };
2090 for_each_possible_cpu(cpu) {
2091 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2093 sum.InPktsOK += stats->InPktsOK;
2094 sum.InPktsInvalid += stats->InPktsInvalid;
2095 sum.InPktsNotValid += stats->InPktsNotValid;
2096 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2097 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2100 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2101 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2102 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2103 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2104 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2110 static int copy_rx_sc_stats(struct sk_buff *skb,
2111 struct pcpu_rx_sc_stats __percpu *pstats)
2113 struct macsec_rx_sc_stats sum = {0, };
2116 for_each_possible_cpu(cpu) {
2117 const struct pcpu_rx_sc_stats *stats;
2118 struct macsec_rx_sc_stats tmp;
2121 stats = per_cpu_ptr(pstats, cpu);
2123 start = u64_stats_fetch_begin_irq(&stats->syncp);
2124 memcpy(&tmp, &stats->stats, sizeof(tmp));
2125 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2127 sum.InOctetsValidated += tmp.InOctetsValidated;
2128 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2129 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2130 sum.InPktsDelayed += tmp.InPktsDelayed;
2131 sum.InPktsOK += tmp.InPktsOK;
2132 sum.InPktsInvalid += tmp.InPktsInvalid;
2133 sum.InPktsLate += tmp.InPktsLate;
2134 sum.InPktsNotValid += tmp.InPktsNotValid;
2135 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2136 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2139 if (nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, sum.InOctetsValidated) ||
2140 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, sum.InOctetsDecrypted) ||
2141 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, sum.InPktsUnchecked) ||
2142 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, sum.InPktsDelayed) ||
2143 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2144 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2145 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, sum.InPktsLate) ||
2146 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2147 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2148 nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2154 static int copy_tx_sc_stats(struct sk_buff *skb,
2155 struct pcpu_tx_sc_stats __percpu *pstats)
2157 struct macsec_tx_sc_stats sum = {0, };
2160 for_each_possible_cpu(cpu) {
2161 const struct pcpu_tx_sc_stats *stats;
2162 struct macsec_tx_sc_stats tmp;
2165 stats = per_cpu_ptr(pstats, cpu);
2167 start = u64_stats_fetch_begin_irq(&stats->syncp);
2168 memcpy(&tmp, &stats->stats, sizeof(tmp));
2169 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2171 sum.OutPktsProtected += tmp.OutPktsProtected;
2172 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2173 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2174 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2177 if (nla_put_u64(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2178 nla_put_u64(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted) ||
2179 nla_put_u64(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, sum.OutOctetsProtected) ||
2180 nla_put_u64(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, sum.OutOctetsEncrypted))
2186 static int copy_secy_stats(struct sk_buff *skb,
2187 struct pcpu_secy_stats __percpu *pstats)
2189 struct macsec_dev_stats sum = {0, };
2192 for_each_possible_cpu(cpu) {
2193 const struct pcpu_secy_stats *stats;
2194 struct macsec_dev_stats tmp;
2197 stats = per_cpu_ptr(pstats, cpu);
2199 start = u64_stats_fetch_begin_irq(&stats->syncp);
2200 memcpy(&tmp, &stats->stats, sizeof(tmp));
2201 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2203 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2204 sum.InPktsUntagged += tmp.InPktsUntagged;
2205 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2206 sum.InPktsNoTag += tmp.InPktsNoTag;
2207 sum.InPktsBadTag += tmp.InPktsBadTag;
2208 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2209 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2210 sum.InPktsOverrun += tmp.InPktsOverrun;
2213 if (nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, sum.OutPktsUntagged) ||
2214 nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, sum.InPktsUntagged) ||
2215 nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, sum.OutPktsTooLong) ||
2216 nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, sum.InPktsNoTag) ||
2217 nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, sum.InPktsBadTag) ||
2218 nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, sum.InPktsUnknownSCI) ||
2219 nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, sum.InPktsNoSCI) ||
2220 nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, sum.InPktsOverrun))
2226 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2228 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2229 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2234 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci) ||
2235 nla_put_u64(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2236 MACSEC_DEFAULT_CIPHER_ID) ||
2237 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2238 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2239 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2240 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2241 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2242 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2243 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2244 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2245 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2246 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2249 if (secy->replay_protect) {
2250 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2254 nla_nest_end(skb, secy_nest);
2258 nla_nest_cancel(skb, secy_nest);
2262 static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2263 struct sk_buff *skb, struct netlink_callback *cb)
2265 struct macsec_rx_sc *rx_sc;
2266 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2267 struct nlattr *txsa_list, *rxsc_list;
2270 struct nlattr *attr;
2272 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2273 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2277 genl_dump_check_consistent(cb, hdr, &macsec_fam);
2279 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2280 goto nla_put_failure;
2282 if (nla_put_secy(secy, skb))
2283 goto nla_put_failure;
2285 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2287 goto nla_put_failure;
2288 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2289 nla_nest_cancel(skb, attr);
2290 goto nla_put_failure;
2292 nla_nest_end(skb, attr);
2294 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2296 goto nla_put_failure;
2297 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2298 nla_nest_cancel(skb, attr);
2299 goto nla_put_failure;
2301 nla_nest_end(skb, attr);
2303 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2305 goto nla_put_failure;
2306 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2307 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2308 struct nlattr *txsa_nest;
2313 txsa_nest = nla_nest_start(skb, j++);
2315 nla_nest_cancel(skb, txsa_list);
2316 goto nla_put_failure;
2319 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2320 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2321 nla_put_u64(skb, MACSEC_SA_ATTR_KEYID, tx_sa->key.id) ||
2322 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2323 nla_nest_cancel(skb, txsa_nest);
2324 nla_nest_cancel(skb, txsa_list);
2325 goto nla_put_failure;
2328 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2330 nla_nest_cancel(skb, txsa_nest);
2331 nla_nest_cancel(skb, txsa_list);
2332 goto nla_put_failure;
2334 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2335 nla_nest_cancel(skb, attr);
2336 nla_nest_cancel(skb, txsa_nest);
2337 nla_nest_cancel(skb, txsa_list);
2338 goto nla_put_failure;
2340 nla_nest_end(skb, attr);
2342 nla_nest_end(skb, txsa_nest);
2344 nla_nest_end(skb, txsa_list);
2346 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2348 goto nla_put_failure;
2351 for_each_rxsc_rtnl(secy, rx_sc) {
2353 struct nlattr *rxsa_list;
2354 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2357 nla_nest_cancel(skb, rxsc_list);
2358 goto nla_put_failure;
2361 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2362 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci)) {
2363 nla_nest_cancel(skb, rxsc_nest);
2364 nla_nest_cancel(skb, rxsc_list);
2365 goto nla_put_failure;
2368 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2370 nla_nest_cancel(skb, rxsc_nest);
2371 nla_nest_cancel(skb, rxsc_list);
2372 goto nla_put_failure;
2374 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2375 nla_nest_cancel(skb, attr);
2376 nla_nest_cancel(skb, rxsc_nest);
2377 nla_nest_cancel(skb, rxsc_list);
2378 goto nla_put_failure;
2380 nla_nest_end(skb, attr);
2382 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2384 nla_nest_cancel(skb, rxsc_nest);
2385 nla_nest_cancel(skb, rxsc_list);
2386 goto nla_put_failure;
2389 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2390 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2391 struct nlattr *rxsa_nest;
2396 rxsa_nest = nla_nest_start(skb, k++);
2398 nla_nest_cancel(skb, rxsa_list);
2399 nla_nest_cancel(skb, rxsc_nest);
2400 nla_nest_cancel(skb, rxsc_list);
2401 goto nla_put_failure;
2404 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2406 nla_nest_cancel(skb, rxsa_list);
2407 nla_nest_cancel(skb, rxsc_nest);
2408 nla_nest_cancel(skb, rxsc_list);
2409 goto nla_put_failure;
2411 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2412 nla_nest_cancel(skb, attr);
2413 nla_nest_cancel(skb, rxsa_list);
2414 nla_nest_cancel(skb, rxsc_nest);
2415 nla_nest_cancel(skb, rxsc_list);
2416 goto nla_put_failure;
2418 nla_nest_end(skb, attr);
2420 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2421 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2422 nla_put_u64(skb, MACSEC_SA_ATTR_KEYID, rx_sa->key.id) ||
2423 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2424 nla_nest_cancel(skb, rxsa_nest);
2425 nla_nest_cancel(skb, rxsc_nest);
2426 nla_nest_cancel(skb, rxsc_list);
2427 goto nla_put_failure;
2429 nla_nest_end(skb, rxsa_nest);
2432 nla_nest_end(skb, rxsa_list);
2433 nla_nest_end(skb, rxsc_nest);
2436 nla_nest_end(skb, rxsc_list);
2438 genlmsg_end(skb, hdr);
2443 genlmsg_cancel(skb, hdr);
2447 static int macsec_generation = 1; /* protected by RTNL */
2449 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2451 struct net *net = sock_net(skb->sk);
2452 struct net_device *dev;
2455 dev_idx = cb->args[0];
2460 cb->seq = macsec_generation;
2462 for_each_netdev(net, dev) {
2463 struct macsec_secy *secy;
2468 if (!netif_is_macsec(dev))
2471 secy = &macsec_priv(dev)->secy;
2472 if (dump_secy(secy, dev, skb, cb) < 0)
2484 static const struct genl_ops macsec_genl_ops[] = {
2486 .cmd = MACSEC_CMD_GET_TXSC,
2487 .dumpit = macsec_dump_txsc,
2488 .policy = macsec_genl_policy,
2491 .cmd = MACSEC_CMD_ADD_RXSC,
2492 .doit = macsec_add_rxsc,
2493 .policy = macsec_genl_policy,
2494 .flags = GENL_ADMIN_PERM,
2497 .cmd = MACSEC_CMD_DEL_RXSC,
2498 .doit = macsec_del_rxsc,
2499 .policy = macsec_genl_policy,
2500 .flags = GENL_ADMIN_PERM,
2503 .cmd = MACSEC_CMD_UPD_RXSC,
2504 .doit = macsec_upd_rxsc,
2505 .policy = macsec_genl_policy,
2506 .flags = GENL_ADMIN_PERM,
2509 .cmd = MACSEC_CMD_ADD_TXSA,
2510 .doit = macsec_add_txsa,
2511 .policy = macsec_genl_policy,
2512 .flags = GENL_ADMIN_PERM,
2515 .cmd = MACSEC_CMD_DEL_TXSA,
2516 .doit = macsec_del_txsa,
2517 .policy = macsec_genl_policy,
2518 .flags = GENL_ADMIN_PERM,
2521 .cmd = MACSEC_CMD_UPD_TXSA,
2522 .doit = macsec_upd_txsa,
2523 .policy = macsec_genl_policy,
2524 .flags = GENL_ADMIN_PERM,
2527 .cmd = MACSEC_CMD_ADD_RXSA,
2528 .doit = macsec_add_rxsa,
2529 .policy = macsec_genl_policy,
2530 .flags = GENL_ADMIN_PERM,
2533 .cmd = MACSEC_CMD_DEL_RXSA,
2534 .doit = macsec_del_rxsa,
2535 .policy = macsec_genl_policy,
2536 .flags = GENL_ADMIN_PERM,
2539 .cmd = MACSEC_CMD_UPD_RXSA,
2540 .doit = macsec_upd_rxsa,
2541 .policy = macsec_genl_policy,
2542 .flags = GENL_ADMIN_PERM,
2546 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2547 struct net_device *dev)
2549 struct macsec_dev *macsec = netdev_priv(dev);
2550 struct macsec_secy *secy = &macsec->secy;
2551 struct pcpu_secy_stats *secy_stats;
2555 if (!secy->protect_frames) {
2556 secy_stats = this_cpu_ptr(macsec->stats);
2557 u64_stats_update_begin(&secy_stats->syncp);
2558 secy_stats->stats.OutPktsUntagged++;
2559 u64_stats_update_end(&secy_stats->syncp);
2561 ret = dev_queue_xmit(skb);
2562 count_tx(dev, ret, len);
2566 if (!secy->operational) {
2568 dev->stats.tx_dropped++;
2569 return NETDEV_TX_OK;
2572 skb = macsec_encrypt(skb, dev);
2574 if (PTR_ERR(skb) != -EINPROGRESS)
2575 dev->stats.tx_dropped++;
2576 return NETDEV_TX_OK;
2579 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2581 macsec_encrypt_finish(skb, dev);
2583 ret = dev_queue_xmit(skb);
2584 count_tx(dev, ret, len);
2588 #define MACSEC_FEATURES \
2589 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2590 static int macsec_dev_init(struct net_device *dev)
2592 struct macsec_dev *macsec = macsec_priv(dev);
2593 struct net_device *real_dev = macsec->real_dev;
2595 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2599 dev->features = real_dev->features & MACSEC_FEATURES;
2600 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2602 dev->needed_headroom = real_dev->needed_headroom +
2603 MACSEC_NEEDED_HEADROOM;
2604 dev->needed_tailroom = real_dev->needed_tailroom +
2605 MACSEC_NEEDED_TAILROOM;
2607 if (is_zero_ether_addr(dev->dev_addr))
2608 eth_hw_addr_inherit(dev, real_dev);
2609 if (is_zero_ether_addr(dev->broadcast))
2610 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2615 static void macsec_dev_uninit(struct net_device *dev)
2617 free_percpu(dev->tstats);
2620 static netdev_features_t macsec_fix_features(struct net_device *dev,
2621 netdev_features_t features)
2623 struct macsec_dev *macsec = macsec_priv(dev);
2624 struct net_device *real_dev = macsec->real_dev;
2626 features &= real_dev->features & MACSEC_FEATURES;
2627 features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2632 static int macsec_dev_open(struct net_device *dev)
2634 struct macsec_dev *macsec = macsec_priv(dev);
2635 struct net_device *real_dev = macsec->real_dev;
2638 if (!(real_dev->flags & IFF_UP))
2641 err = dev_uc_add(real_dev, dev->dev_addr);
2645 if (dev->flags & IFF_ALLMULTI) {
2646 err = dev_set_allmulti(real_dev, 1);
2651 if (dev->flags & IFF_PROMISC) {
2652 err = dev_set_promiscuity(real_dev, 1);
2654 goto clear_allmulti;
2657 if (netif_carrier_ok(real_dev))
2658 netif_carrier_on(dev);
2662 if (dev->flags & IFF_ALLMULTI)
2663 dev_set_allmulti(real_dev, -1);
2665 dev_uc_del(real_dev, dev->dev_addr);
2666 netif_carrier_off(dev);
2670 static int macsec_dev_stop(struct net_device *dev)
2672 struct macsec_dev *macsec = macsec_priv(dev);
2673 struct net_device *real_dev = macsec->real_dev;
2675 netif_carrier_off(dev);
2677 dev_mc_unsync(real_dev, dev);
2678 dev_uc_unsync(real_dev, dev);
2680 if (dev->flags & IFF_ALLMULTI)
2681 dev_set_allmulti(real_dev, -1);
2683 if (dev->flags & IFF_PROMISC)
2684 dev_set_promiscuity(real_dev, -1);
2686 dev_uc_del(real_dev, dev->dev_addr);
2691 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2693 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2695 if (!(dev->flags & IFF_UP))
2698 if (change & IFF_ALLMULTI)
2699 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2701 if (change & IFF_PROMISC)
2702 dev_set_promiscuity(real_dev,
2703 dev->flags & IFF_PROMISC ? 1 : -1);
2706 static void macsec_dev_set_rx_mode(struct net_device *dev)
2708 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2710 dev_mc_sync(real_dev, dev);
2711 dev_uc_sync(real_dev, dev);
2714 static int macsec_set_mac_address(struct net_device *dev, void *p)
2716 struct macsec_dev *macsec = macsec_priv(dev);
2717 struct net_device *real_dev = macsec->real_dev;
2718 struct sockaddr *addr = p;
2721 if (!is_valid_ether_addr(addr->sa_data))
2722 return -EADDRNOTAVAIL;
2724 if (!(dev->flags & IFF_UP))
2727 err = dev_uc_add(real_dev, addr->sa_data);
2731 dev_uc_del(real_dev, dev->dev_addr);
2734 ether_addr_copy(dev->dev_addr, addr->sa_data);
2738 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2740 struct macsec_dev *macsec = macsec_priv(dev);
2741 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2743 if (macsec->real_dev->mtu - extra < new_mtu)
2751 static struct rtnl_link_stats64 *macsec_get_stats64(struct net_device *dev,
2752 struct rtnl_link_stats64 *s)
2759 for_each_possible_cpu(cpu) {
2760 struct pcpu_sw_netstats *stats;
2761 struct pcpu_sw_netstats tmp;
2764 stats = per_cpu_ptr(dev->tstats, cpu);
2766 start = u64_stats_fetch_begin_irq(&stats->syncp);
2767 tmp.rx_packets = stats->rx_packets;
2768 tmp.rx_bytes = stats->rx_bytes;
2769 tmp.tx_packets = stats->tx_packets;
2770 tmp.tx_bytes = stats->tx_bytes;
2771 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2773 s->rx_packets += tmp.rx_packets;
2774 s->rx_bytes += tmp.rx_bytes;
2775 s->tx_packets += tmp.tx_packets;
2776 s->tx_bytes += tmp.tx_bytes;
2779 s->rx_dropped = dev->stats.rx_dropped;
2780 s->tx_dropped = dev->stats.tx_dropped;
2785 static int macsec_get_iflink(const struct net_device *dev)
2787 return macsec_priv(dev)->real_dev->ifindex;
2790 static const struct net_device_ops macsec_netdev_ops = {
2791 .ndo_init = macsec_dev_init,
2792 .ndo_uninit = macsec_dev_uninit,
2793 .ndo_open = macsec_dev_open,
2794 .ndo_stop = macsec_dev_stop,
2795 .ndo_fix_features = macsec_fix_features,
2796 .ndo_change_mtu = macsec_change_mtu,
2797 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2798 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2799 .ndo_set_mac_address = macsec_set_mac_address,
2800 .ndo_start_xmit = macsec_start_xmit,
2801 .ndo_get_stats64 = macsec_get_stats64,
2802 .ndo_get_iflink = macsec_get_iflink,
2805 static const struct device_type macsec_type = {
2809 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2810 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2811 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2812 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2813 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2814 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2815 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2816 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2817 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2818 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2819 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2820 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2821 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2824 static void macsec_free_netdev(struct net_device *dev)
2826 struct macsec_dev *macsec = macsec_priv(dev);
2827 struct net_device *real_dev = macsec->real_dev;
2829 free_percpu(macsec->stats);
2830 free_percpu(macsec->secy.tx_sc.stats);
2836 static void macsec_setup(struct net_device *dev)
2839 dev->tx_queue_len = 0;
2840 dev->netdev_ops = &macsec_netdev_ops;
2841 dev->destructor = macsec_free_netdev;
2843 eth_zero_addr(dev->broadcast);
2846 static void macsec_changelink_common(struct net_device *dev,
2847 struct nlattr *data[])
2849 struct macsec_secy *secy;
2850 struct macsec_tx_sc *tx_sc;
2852 secy = &macsec_priv(dev)->secy;
2853 tx_sc = &secy->tx_sc;
2855 if (data[IFLA_MACSEC_ENCODING_SA]) {
2856 struct macsec_tx_sa *tx_sa;
2858 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
2859 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
2861 secy->operational = tx_sa && tx_sa->active;
2864 if (data[IFLA_MACSEC_WINDOW])
2865 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
2867 if (data[IFLA_MACSEC_ENCRYPT])
2868 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
2870 if (data[IFLA_MACSEC_PROTECT])
2871 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
2873 if (data[IFLA_MACSEC_INC_SCI])
2874 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
2876 if (data[IFLA_MACSEC_ES])
2877 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
2879 if (data[IFLA_MACSEC_SCB])
2880 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
2882 if (data[IFLA_MACSEC_REPLAY_PROTECT])
2883 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
2885 if (data[IFLA_MACSEC_VALIDATION])
2886 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
2889 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
2890 struct nlattr *data[])
2895 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
2896 data[IFLA_MACSEC_ICV_LEN] ||
2897 data[IFLA_MACSEC_SCI] ||
2898 data[IFLA_MACSEC_PORT])
2901 macsec_changelink_common(dev, data);
2906 static void macsec_del_dev(struct macsec_dev *macsec)
2910 while (macsec->secy.rx_sc) {
2911 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
2913 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
2917 for (i = 0; i < MACSEC_NUM_AN; i++) {
2918 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
2921 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
2927 static void macsec_dellink(struct net_device *dev, struct list_head *head)
2929 struct macsec_dev *macsec = macsec_priv(dev);
2930 struct net_device *real_dev = macsec->real_dev;
2931 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
2933 macsec_generation++;
2935 unregister_netdevice_queue(dev, head);
2936 list_del_rcu(&macsec->secys);
2937 if (list_empty(&rxd->secys)) {
2938 netdev_rx_handler_unregister(real_dev);
2942 macsec_del_dev(macsec);
2945 static int register_macsec_dev(struct net_device *real_dev,
2946 struct net_device *dev)
2948 struct macsec_dev *macsec = macsec_priv(dev);
2949 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
2954 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
2958 INIT_LIST_HEAD(&rxd->secys);
2960 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
2968 list_add_tail_rcu(&macsec->secys, &rxd->secys);
2972 static bool sci_exists(struct net_device *dev, sci_t sci)
2974 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
2975 struct macsec_dev *macsec;
2977 list_for_each_entry(macsec, &rxd->secys, secys) {
2978 if (macsec->secy.sci == sci)
2985 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
2987 return make_sci(dev->dev_addr, port);
2990 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
2992 struct macsec_dev *macsec = macsec_priv(dev);
2993 struct macsec_secy *secy = &macsec->secy;
2995 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
2999 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3000 if (!secy->tx_sc.stats) {
3001 free_percpu(macsec->stats);
3005 if (sci == MACSEC_UNDEF_SCI)
3006 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3009 secy->operational = true;
3010 secy->key_len = DEFAULT_SAK_LEN;
3011 secy->icv_len = icv_len;
3012 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3013 secy->protect_frames = true;
3014 secy->replay_protect = false;
3017 secy->tx_sc.active = true;
3018 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3019 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3020 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3021 secy->tx_sc.end_station = false;
3022 secy->tx_sc.scb = false;
3027 static int macsec_newlink(struct net *net, struct net_device *dev,
3028 struct nlattr *tb[], struct nlattr *data[])
3030 struct macsec_dev *macsec = macsec_priv(dev);
3031 struct net_device *real_dev;
3034 u8 icv_len = DEFAULT_ICV_LEN;
3035 rx_handler_func_t *rx_handler;
3039 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3043 dev->priv_flags |= IFF_MACSEC;
3045 macsec->real_dev = real_dev;
3047 if (data && data[IFLA_MACSEC_ICV_LEN])
3048 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3049 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3051 rx_handler = rtnl_dereference(real_dev->rx_handler);
3052 if (rx_handler && rx_handler != macsec_handle_frame)
3055 err = register_netdevice(dev);
3059 /* need to be already registered so that ->init has run and
3060 * the MAC addr is set
3062 if (data && data[IFLA_MACSEC_SCI])
3063 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3064 else if (data && data[IFLA_MACSEC_PORT])
3065 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3067 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3069 if (rx_handler && sci_exists(real_dev, sci)) {
3074 err = macsec_add_dev(dev, sci, icv_len);
3079 macsec_changelink_common(dev, data);
3081 err = register_macsec_dev(real_dev, dev);
3085 macsec_generation++;
3092 macsec_del_dev(macsec);
3094 unregister_netdevice(dev);
3098 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[])
3100 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3101 u8 icv_len = DEFAULT_ICV_LEN;
3108 if (data[IFLA_MACSEC_CIPHER_SUITE])
3109 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3111 if (data[IFLA_MACSEC_ICV_LEN])
3112 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3115 case MACSEC_DEFAULT_CIPHER_ID:
3116 case MACSEC_DEFAULT_CIPHER_ALT:
3117 if (icv_len < MACSEC_MIN_ICV_LEN ||
3118 icv_len > MACSEC_MAX_ICV_LEN)
3125 if (data[IFLA_MACSEC_ENCODING_SA]) {
3126 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3130 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3131 flag < IFLA_MACSEC_VALIDATION;
3134 if (nla_get_u8(data[flag]) > 1)
3139 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3140 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3141 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3143 if ((sci && (scb || es)) || (scb && es))
3146 if (data[IFLA_MACSEC_VALIDATION] &&
3147 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3150 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3151 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3152 !data[IFLA_MACSEC_WINDOW])
3158 static struct net *macsec_get_link_net(const struct net_device *dev)
3160 return dev_net(macsec_priv(dev)->real_dev);
3163 static size_t macsec_get_size(const struct net_device *dev)
3166 nla_total_size(8) + /* SCI */
3167 nla_total_size(1) + /* ICV_LEN */
3168 nla_total_size(8) + /* CIPHER_SUITE */
3169 nla_total_size(4) + /* WINDOW */
3170 nla_total_size(1) + /* ENCODING_SA */
3171 nla_total_size(1) + /* ENCRYPT */
3172 nla_total_size(1) + /* PROTECT */
3173 nla_total_size(1) + /* INC_SCI */
3174 nla_total_size(1) + /* ES */
3175 nla_total_size(1) + /* SCB */
3176 nla_total_size(1) + /* REPLAY_PROTECT */
3177 nla_total_size(1) + /* VALIDATION */
3181 static int macsec_fill_info(struct sk_buff *skb,
3182 const struct net_device *dev)
3184 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3185 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3187 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci) ||
3188 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3189 nla_put_u64(skb, IFLA_MACSEC_CIPHER_SUITE,
3190 MACSEC_DEFAULT_CIPHER_ID) ||
3191 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3192 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3193 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3194 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3195 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3196 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3197 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3198 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3200 goto nla_put_failure;
3202 if (secy->replay_protect) {
3203 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3204 goto nla_put_failure;
3213 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3215 .priv_size = sizeof(struct macsec_dev),
3216 .maxtype = IFLA_MACSEC_MAX,
3217 .policy = macsec_rtnl_policy,
3218 .setup = macsec_setup,
3219 .validate = macsec_validate_attr,
3220 .newlink = macsec_newlink,
3221 .changelink = macsec_changelink,
3222 .dellink = macsec_dellink,
3223 .get_size = macsec_get_size,
3224 .fill_info = macsec_fill_info,
3225 .get_link_net = macsec_get_link_net,
3228 static bool is_macsec_master(struct net_device *dev)
3230 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3233 static int macsec_notify(struct notifier_block *this, unsigned long event,
3236 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3239 if (!is_macsec_master(real_dev))
3243 case NETDEV_UNREGISTER: {
3244 struct macsec_dev *m, *n;
3245 struct macsec_rxh_data *rxd;
3247 rxd = macsec_data_rtnl(real_dev);
3248 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3249 macsec_dellink(m->secy.netdev, &head);
3251 unregister_netdevice_many(&head);
3254 case NETDEV_CHANGEMTU: {
3255 struct macsec_dev *m;
3256 struct macsec_rxh_data *rxd;
3258 rxd = macsec_data_rtnl(real_dev);
3259 list_for_each_entry(m, &rxd->secys, secys) {
3260 struct net_device *dev = m->secy.netdev;
3261 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3262 macsec_extra_len(true));
3265 dev_set_mtu(dev, mtu);
3273 static struct notifier_block macsec_notifier = {
3274 .notifier_call = macsec_notify,
3277 static int __init macsec_init(void)
3281 pr_info("MACsec IEEE 802.1AE\n");
3282 err = register_netdevice_notifier(&macsec_notifier);
3286 err = rtnl_link_register(&macsec_link_ops);
3290 err = genl_register_family_with_ops(&macsec_fam, macsec_genl_ops);
3297 rtnl_link_unregister(&macsec_link_ops);
3299 unregister_netdevice_notifier(&macsec_notifier);
3303 static void __exit macsec_exit(void)
3305 genl_unregister_family(&macsec_fam);
3306 rtnl_link_unregister(&macsec_link_ops);
3307 unregister_netdevice_notifier(&macsec_notifier);
3310 module_init(macsec_init);
3311 module_exit(macsec_exit);
3313 MODULE_ALIAS_RTNL_LINK("macsec");
3315 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3316 MODULE_LICENSE("GPL v2");