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);
350 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
352 if (atomic_dec_and_test(&sa->refcnt))
353 call_rcu(&sa->rcu, free_rxsa);
356 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
358 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
360 if (!sa || !sa->active)
363 if (!atomic_inc_not_zero(&sa->refcnt))
369 static void free_txsa(struct rcu_head *head)
371 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
373 crypto_free_aead(sa->key.tfm);
374 free_percpu(sa->stats);
378 static void macsec_txsa_put(struct macsec_tx_sa *sa)
380 if (atomic_dec_and_test(&sa->refcnt))
381 call_rcu(&sa->rcu, free_txsa);
384 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
386 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
387 return (struct macsec_cb *)skb->cb;
390 #define MACSEC_PORT_ES (htons(0x0001))
391 #define MACSEC_PORT_SCB (0x0000)
392 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
394 #define DEFAULT_SAK_LEN 16
395 #define DEFAULT_SEND_SCI true
396 #define DEFAULT_ENCRYPT false
397 #define DEFAULT_ENCODING_SA 0
399 static sci_t make_sci(u8 *addr, __be16 port)
403 memcpy(&sci, addr, ETH_ALEN);
404 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
409 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
414 memcpy(&sci, hdr->secure_channel_id,
415 sizeof(hdr->secure_channel_id));
417 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
422 static unsigned int macsec_sectag_len(bool sci_present)
424 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
427 static unsigned int macsec_hdr_len(bool sci_present)
429 return macsec_sectag_len(sci_present) + ETH_HLEN;
432 static unsigned int macsec_extra_len(bool sci_present)
434 return macsec_sectag_len(sci_present) + sizeof(__be16);
437 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
438 static void macsec_fill_sectag(struct macsec_eth_header *h,
439 const struct macsec_secy *secy, u32 pn)
441 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
443 memset(&h->tci_an, 0, macsec_sectag_len(tx_sc->send_sci));
444 h->eth.h_proto = htons(ETH_P_MACSEC);
446 if (tx_sc->send_sci ||
447 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb)) {
448 h->tci_an |= MACSEC_TCI_SC;
449 memcpy(&h->secure_channel_id, &secy->sci,
450 sizeof(h->secure_channel_id));
452 if (tx_sc->end_station)
453 h->tci_an |= MACSEC_TCI_ES;
455 h->tci_an |= MACSEC_TCI_SCB;
458 h->packet_number = htonl(pn);
460 /* with GCM, C/E clear for !encrypt, both set for encrypt */
462 h->tci_an |= MACSEC_TCI_CONFID;
463 else if (secy->icv_len != DEFAULT_ICV_LEN)
464 h->tci_an |= MACSEC_TCI_C;
466 h->tci_an |= tx_sc->encoding_sa;
469 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
471 if (data_len < MIN_NON_SHORT_LEN)
472 h->short_length = data_len;
475 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
476 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
478 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
479 int len = skb->len - 2 * ETH_ALEN;
480 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
482 /* a) It comprises at least 17 octets */
486 /* b) MACsec EtherType: already checked */
488 /* c) V bit is clear */
489 if (h->tci_an & MACSEC_TCI_VERSION)
492 /* d) ES or SCB => !SC */
493 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
494 (h->tci_an & MACSEC_TCI_SC))
497 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
501 /* rx.pn != 0 (figure 10-5) */
502 if (!h->packet_number)
505 /* length check, f) g) h) i) */
507 return len == extra_len + h->short_length;
508 return len >= extra_len + MIN_NON_SHORT_LEN;
511 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
512 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
514 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
516 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
519 gcm_iv->pn = htonl(pn);
522 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
524 return (struct macsec_eth_header *)skb_mac_header(skb);
527 static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
531 spin_lock_bh(&tx_sa->lock);
535 if (tx_sa->next_pn == 0) {
536 pr_debug("PN wrapped, transitioning to !oper\n");
537 tx_sa->active = false;
538 if (secy->protect_frames)
539 secy->operational = false;
541 spin_unlock_bh(&tx_sa->lock);
546 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
548 struct macsec_dev *macsec = netdev_priv(dev);
550 skb->dev = macsec->real_dev;
551 skb_reset_mac_header(skb);
552 skb->protocol = eth_hdr(skb)->h_proto;
555 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
556 struct macsec_tx_sa *tx_sa)
558 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
560 u64_stats_update_begin(&txsc_stats->syncp);
561 if (tx_sc->encrypt) {
562 txsc_stats->stats.OutOctetsEncrypted += skb->len;
563 txsc_stats->stats.OutPktsEncrypted++;
564 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
566 txsc_stats->stats.OutOctetsProtected += skb->len;
567 txsc_stats->stats.OutPktsProtected++;
568 this_cpu_inc(tx_sa->stats->OutPktsProtected);
570 u64_stats_update_end(&txsc_stats->syncp);
573 static void count_tx(struct net_device *dev, int ret, int len)
575 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
576 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
578 u64_stats_update_begin(&stats->syncp);
580 stats->tx_bytes += len;
581 u64_stats_update_end(&stats->syncp);
583 dev->stats.tx_dropped++;
587 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
589 struct sk_buff *skb = base->data;
590 struct net_device *dev = skb->dev;
591 struct macsec_dev *macsec = macsec_priv(dev);
592 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
595 aead_request_free(macsec_skb_cb(skb)->req);
598 macsec_encrypt_finish(skb, dev);
599 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
601 ret = dev_queue_xmit(skb);
602 count_tx(dev, ret, len);
603 rcu_read_unlock_bh();
609 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
611 struct scatterlist **sg)
613 size_t size, iv_offset, sg_offset;
614 struct aead_request *req;
617 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
619 size += GCM_AES_IV_LEN;
621 size = ALIGN(size, __alignof__(struct scatterlist));
623 size += sizeof(struct scatterlist) * (MAX_SKB_FRAGS + 1);
625 tmp = kmalloc(size, GFP_ATOMIC);
629 *iv = (unsigned char *)(tmp + iv_offset);
630 *sg = (struct scatterlist *)(tmp + sg_offset);
633 aead_request_set_tfm(req, tfm);
638 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
639 struct net_device *dev)
642 struct scatterlist *sg;
645 struct macsec_eth_header *hh;
646 size_t unprotected_len;
647 struct aead_request *req;
648 struct macsec_secy *secy;
649 struct macsec_tx_sc *tx_sc;
650 struct macsec_tx_sa *tx_sa;
651 struct macsec_dev *macsec = macsec_priv(dev);
654 secy = &macsec->secy;
655 tx_sc = &secy->tx_sc;
657 /* 10.5.1 TX SA assignment */
658 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
660 secy->operational = false;
662 return ERR_PTR(-EINVAL);
665 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
666 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
667 struct sk_buff *nskb = skb_copy_expand(skb,
668 MACSEC_NEEDED_HEADROOM,
669 MACSEC_NEEDED_TAILROOM,
675 macsec_txsa_put(tx_sa);
677 return ERR_PTR(-ENOMEM);
680 skb = skb_unshare(skb, GFP_ATOMIC);
682 macsec_txsa_put(tx_sa);
683 return ERR_PTR(-ENOMEM);
687 unprotected_len = skb->len;
689 hh = (struct macsec_eth_header *)skb_push(skb, macsec_extra_len(tx_sc->send_sci));
690 memmove(hh, eth, 2 * ETH_ALEN);
692 pn = tx_sa_update_pn(tx_sa, secy);
694 macsec_txsa_put(tx_sa);
696 return ERR_PTR(-ENOLINK);
698 macsec_fill_sectag(hh, secy, pn);
699 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
701 skb_put(skb, secy->icv_len);
703 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
704 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
706 u64_stats_update_begin(&secy_stats->syncp);
707 secy_stats->stats.OutPktsTooLong++;
708 u64_stats_update_end(&secy_stats->syncp);
710 macsec_txsa_put(tx_sa);
712 return ERR_PTR(-EINVAL);
715 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg);
717 macsec_txsa_put(tx_sa);
719 return ERR_PTR(-ENOMEM);
722 macsec_fill_iv(iv, secy->sci, pn);
724 sg_init_table(sg, MAX_SKB_FRAGS + 1);
725 skb_to_sgvec(skb, sg, 0, skb->len);
727 if (tx_sc->encrypt) {
728 int len = skb->len - macsec_hdr_len(tx_sc->send_sci) -
730 aead_request_set_crypt(req, sg, sg, len, iv);
731 aead_request_set_ad(req, macsec_hdr_len(tx_sc->send_sci));
733 aead_request_set_crypt(req, sg, sg, 0, iv);
734 aead_request_set_ad(req, skb->len - secy->icv_len);
737 macsec_skb_cb(skb)->req = req;
738 macsec_skb_cb(skb)->tx_sa = tx_sa;
739 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
742 ret = crypto_aead_encrypt(req);
743 if (ret == -EINPROGRESS) {
745 } else if (ret != 0) {
748 aead_request_free(req);
749 macsec_txsa_put(tx_sa);
750 return ERR_PTR(-EINVAL);
754 aead_request_free(req);
755 macsec_txsa_put(tx_sa);
760 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
762 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
763 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
764 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
767 spin_lock(&rx_sa->lock);
768 if (rx_sa->next_pn >= secy->replay_window)
769 lowest_pn = rx_sa->next_pn - secy->replay_window;
771 /* Now perform replay protection check again
772 * (see IEEE 802.1AE-2006 figure 10-5)
774 if (secy->replay_protect && pn < lowest_pn) {
775 spin_unlock(&rx_sa->lock);
776 u64_stats_update_begin(&rxsc_stats->syncp);
777 rxsc_stats->stats.InPktsLate++;
778 u64_stats_update_end(&rxsc_stats->syncp);
782 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
783 u64_stats_update_begin(&rxsc_stats->syncp);
784 if (hdr->tci_an & MACSEC_TCI_E)
785 rxsc_stats->stats.InOctetsDecrypted += skb->len;
787 rxsc_stats->stats.InOctetsValidated += skb->len;
788 u64_stats_update_end(&rxsc_stats->syncp);
791 if (!macsec_skb_cb(skb)->valid) {
792 spin_unlock(&rx_sa->lock);
795 if (hdr->tci_an & MACSEC_TCI_C ||
796 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
797 u64_stats_update_begin(&rxsc_stats->syncp);
798 rxsc_stats->stats.InPktsNotValid++;
799 u64_stats_update_end(&rxsc_stats->syncp);
803 u64_stats_update_begin(&rxsc_stats->syncp);
804 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
805 rxsc_stats->stats.InPktsInvalid++;
806 this_cpu_inc(rx_sa->stats->InPktsInvalid);
807 } else if (pn < lowest_pn) {
808 rxsc_stats->stats.InPktsDelayed++;
810 rxsc_stats->stats.InPktsUnchecked++;
812 u64_stats_update_end(&rxsc_stats->syncp);
814 u64_stats_update_begin(&rxsc_stats->syncp);
815 if (pn < lowest_pn) {
816 rxsc_stats->stats.InPktsDelayed++;
818 rxsc_stats->stats.InPktsOK++;
819 this_cpu_inc(rx_sa->stats->InPktsOK);
821 u64_stats_update_end(&rxsc_stats->syncp);
823 if (pn >= rx_sa->next_pn)
824 rx_sa->next_pn = pn + 1;
825 spin_unlock(&rx_sa->lock);
831 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
833 skb->pkt_type = PACKET_HOST;
834 skb->protocol = eth_type_trans(skb, dev);
836 skb_reset_network_header(skb);
837 if (!skb_transport_header_was_set(skb))
838 skb_reset_transport_header(skb);
839 skb_reset_mac_len(skb);
842 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
844 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
845 skb_pull(skb, hdr_len);
846 pskb_trim_unique(skb, skb->len - icv_len);
849 static void count_rx(struct net_device *dev, int len)
851 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
853 u64_stats_update_begin(&stats->syncp);
855 stats->rx_bytes += len;
856 u64_stats_update_end(&stats->syncp);
859 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
861 struct sk_buff *skb = base->data;
862 struct net_device *dev = skb->dev;
863 struct macsec_dev *macsec = macsec_priv(dev);
864 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
865 struct macsec_rx_sc *rx_sc = rx_sa->sc;
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);
894 macsec_rxsc_put(rx_sc);
898 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
899 struct net_device *dev,
900 struct macsec_rx_sa *rx_sa,
902 struct macsec_secy *secy)
905 struct scatterlist *sg;
907 struct aead_request *req;
908 struct macsec_eth_header *hdr;
909 u16 icv_len = secy->icv_len;
911 macsec_skb_cb(skb)->valid = false;
912 skb = skb_share_check(skb, GFP_ATOMIC);
914 return ERR_PTR(-ENOMEM);
916 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg);
919 return ERR_PTR(-ENOMEM);
922 hdr = (struct macsec_eth_header *)skb->data;
923 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
925 sg_init_table(sg, MAX_SKB_FRAGS + 1);
926 skb_to_sgvec(skb, sg, 0, skb->len);
928 if (hdr->tci_an & MACSEC_TCI_E) {
929 /* confidentiality: ethernet + macsec header
930 * authenticated, encrypted payload
932 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
934 aead_request_set_crypt(req, sg, sg, len, iv);
935 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
936 skb = skb_unshare(skb, GFP_ATOMIC);
938 aead_request_free(req);
939 return ERR_PTR(-ENOMEM);
942 /* integrity only: all headers + data authenticated */
943 aead_request_set_crypt(req, sg, sg, icv_len, iv);
944 aead_request_set_ad(req, skb->len - icv_len);
947 macsec_skb_cb(skb)->req = req;
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);
1110 sc = sc ? macsec_rxsc_get(sc) : NULL;
1113 secy = &macsec->secy;
1123 macsec = macsec_priv(dev);
1124 secy_stats = this_cpu_ptr(macsec->stats);
1125 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1127 if (!macsec_validate_skb(skb, secy->icv_len)) {
1128 u64_stats_update_begin(&secy_stats->syncp);
1129 secy_stats->stats.InPktsBadTag++;
1130 u64_stats_update_end(&secy_stats->syncp);
1134 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1136 /* 10.6.1 if the SA is not in use */
1138 /* If validateFrames is Strict or the C bit in the
1139 * SecTAG is set, discard
1141 if (hdr->tci_an & MACSEC_TCI_C ||
1142 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1143 u64_stats_update_begin(&rxsc_stats->syncp);
1144 rxsc_stats->stats.InPktsNotUsingSA++;
1145 u64_stats_update_end(&rxsc_stats->syncp);
1149 /* not Strict, the frame (with the SecTAG and ICV
1150 * removed) is delivered to the Controlled Port.
1152 u64_stats_update_begin(&rxsc_stats->syncp);
1153 rxsc_stats->stats.InPktsUnusedSA++;
1154 u64_stats_update_end(&rxsc_stats->syncp);
1158 /* First, PN check to avoid decrypting obviously wrong packets */
1159 pn = ntohl(hdr->packet_number);
1160 if (secy->replay_protect) {
1163 spin_lock(&rx_sa->lock);
1164 late = rx_sa->next_pn >= secy->replay_window &&
1165 pn < (rx_sa->next_pn - secy->replay_window);
1166 spin_unlock(&rx_sa->lock);
1169 u64_stats_update_begin(&rxsc_stats->syncp);
1170 rxsc_stats->stats.InPktsLate++;
1171 u64_stats_update_end(&rxsc_stats->syncp);
1176 macsec_skb_cb(skb)->rx_sa = rx_sa;
1178 /* Disabled && !changed text => skip validation */
1179 if (hdr->tci_an & MACSEC_TCI_C ||
1180 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1181 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1184 /* the decrypt callback needs the reference */
1185 if (PTR_ERR(skb) != -EINPROGRESS) {
1186 macsec_rxsa_put(rx_sa);
1187 macsec_rxsc_put(rx_sc);
1191 return RX_HANDLER_CONSUMED;
1194 if (!macsec_post_decrypt(skb, secy, pn))
1198 macsec_finalize_skb(skb, secy->icv_len,
1199 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1200 macsec_reset_skb(skb, secy->netdev);
1203 macsec_rxsa_put(rx_sa);
1204 macsec_rxsc_put(rx_sc);
1206 ret = gro_cells_receive(&macsec->gro_cells, skb);
1207 if (ret == NET_RX_SUCCESS)
1208 count_rx(dev, skb->len);
1210 macsec->secy.netdev->stats.rx_dropped++;
1215 return RX_HANDLER_CONSUMED;
1218 macsec_rxsa_put(rx_sa);
1220 macsec_rxsc_put(rx_sc);
1225 return RX_HANDLER_CONSUMED;
1228 /* 10.6.1 if the SC is not found */
1229 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1231 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1232 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1234 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1235 struct sk_buff *nskb;
1237 secy_stats = this_cpu_ptr(macsec->stats);
1239 /* If validateFrames is Strict or the C bit in the
1240 * SecTAG is set, discard
1243 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1244 u64_stats_update_begin(&secy_stats->syncp);
1245 secy_stats->stats.InPktsNoSCI++;
1246 u64_stats_update_end(&secy_stats->syncp);
1250 /* not strict, the frame (with the SecTAG and ICV
1251 * removed) is delivered to the Controlled Port.
1253 nskb = skb_clone(skb, GFP_ATOMIC);
1257 macsec_reset_skb(nskb, macsec->secy.netdev);
1259 ret = netif_rx(nskb);
1260 if (ret == NET_RX_SUCCESS) {
1261 u64_stats_update_begin(&secy_stats->syncp);
1262 secy_stats->stats.InPktsUnknownSCI++;
1263 u64_stats_update_end(&secy_stats->syncp);
1265 macsec->secy.netdev->stats.rx_dropped++;
1271 return RX_HANDLER_PASS;
1274 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1276 struct crypto_aead *tfm;
1279 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1284 ret = crypto_aead_setkey(tfm, key, key_len);
1288 ret = crypto_aead_setauthsize(tfm, icv_len);
1294 crypto_free_aead(tfm);
1295 return ERR_PTR(ret);
1298 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1301 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1305 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1306 if (IS_ERR(rx_sa->key.tfm)) {
1307 free_percpu(rx_sa->stats);
1308 return PTR_ERR(rx_sa->key.tfm);
1311 rx_sa->active = false;
1313 atomic_set(&rx_sa->refcnt, 1);
1314 spin_lock_init(&rx_sa->lock);
1319 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1321 rx_sa->active = false;
1323 macsec_rxsa_put(rx_sa);
1326 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1330 for (i = 0; i < MACSEC_NUM_AN; i++) {
1331 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1333 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1338 macsec_rxsc_put(rx_sc);
1341 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1343 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1345 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1347 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1348 if (rx_sc->sci == sci) {
1351 rcu_assign_pointer(*rx_scp, rx_sc->next);
1359 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1361 struct macsec_rx_sc *rx_sc;
1362 struct macsec_dev *macsec;
1363 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1364 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1365 struct macsec_secy *secy;
1367 list_for_each_entry(macsec, &rxd->secys, secys) {
1368 if (find_rx_sc_rtnl(&macsec->secy, sci))
1369 return ERR_PTR(-EEXIST);
1372 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1374 return ERR_PTR(-ENOMEM);
1376 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1377 if (!rx_sc->stats) {
1379 return ERR_PTR(-ENOMEM);
1383 rx_sc->active = true;
1384 atomic_set(&rx_sc->refcnt, 1);
1386 secy = &macsec_priv(dev)->secy;
1387 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1388 rcu_assign_pointer(secy->rx_sc, rx_sc);
1396 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1399 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1403 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1404 if (IS_ERR(tx_sa->key.tfm)) {
1405 free_percpu(tx_sa->stats);
1406 return PTR_ERR(tx_sa->key.tfm);
1409 tx_sa->active = false;
1410 atomic_set(&tx_sa->refcnt, 1);
1411 spin_lock_init(&tx_sa->lock);
1416 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1418 tx_sa->active = false;
1420 macsec_txsa_put(tx_sa);
1423 static struct genl_family macsec_fam = {
1424 .id = GENL_ID_GENERATE,
1425 .name = MACSEC_GENL_NAME,
1427 .version = MACSEC_GENL_VERSION,
1428 .maxattr = MACSEC_ATTR_MAX,
1432 static struct net_device *get_dev_from_nl(struct net *net,
1433 struct nlattr **attrs)
1435 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1436 struct net_device *dev;
1438 dev = __dev_get_by_index(net, ifindex);
1440 return ERR_PTR(-ENODEV);
1442 if (!netif_is_macsec(dev))
1443 return ERR_PTR(-ENODEV);
1448 static sci_t nla_get_sci(const struct nlattr *nla)
1450 return (__force sci_t)nla_get_u64(nla);
1453 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1456 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1459 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1460 struct nlattr **attrs,
1461 struct nlattr **tb_sa,
1462 struct net_device **devp,
1463 struct macsec_secy **secyp,
1464 struct macsec_tx_sc **scp,
1467 struct net_device *dev;
1468 struct macsec_secy *secy;
1469 struct macsec_tx_sc *tx_sc;
1470 struct macsec_tx_sa *tx_sa;
1472 if (!tb_sa[MACSEC_SA_ATTR_AN])
1473 return ERR_PTR(-EINVAL);
1475 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1477 dev = get_dev_from_nl(net, attrs);
1479 return ERR_CAST(dev);
1481 if (*assoc_num >= MACSEC_NUM_AN)
1482 return ERR_PTR(-EINVAL);
1484 secy = &macsec_priv(dev)->secy;
1485 tx_sc = &secy->tx_sc;
1487 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1489 return ERR_PTR(-ENODEV);
1497 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1498 struct nlattr **attrs,
1499 struct nlattr **tb_rxsc,
1500 struct net_device **devp,
1501 struct macsec_secy **secyp)
1503 struct net_device *dev;
1504 struct macsec_secy *secy;
1505 struct macsec_rx_sc *rx_sc;
1508 dev = get_dev_from_nl(net, attrs);
1510 return ERR_CAST(dev);
1512 secy = &macsec_priv(dev)->secy;
1514 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1515 return ERR_PTR(-EINVAL);
1517 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1518 rx_sc = find_rx_sc_rtnl(secy, sci);
1520 return ERR_PTR(-ENODEV);
1528 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1529 struct nlattr **attrs,
1530 struct nlattr **tb_rxsc,
1531 struct nlattr **tb_sa,
1532 struct net_device **devp,
1533 struct macsec_secy **secyp,
1534 struct macsec_rx_sc **scp,
1537 struct macsec_rx_sc *rx_sc;
1538 struct macsec_rx_sa *rx_sa;
1540 if (!tb_sa[MACSEC_SA_ATTR_AN])
1541 return ERR_PTR(-EINVAL);
1543 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1544 if (*assoc_num >= MACSEC_NUM_AN)
1545 return ERR_PTR(-EINVAL);
1547 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1549 return ERR_CAST(rx_sc);
1551 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1553 return ERR_PTR(-ENODEV);
1560 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1561 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1562 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1563 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1566 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1567 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1568 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1571 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1572 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1573 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1574 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1575 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1576 .len = MACSEC_KEYID_LEN, },
1577 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1578 .len = MACSEC_MAX_KEY_LEN, },
1581 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1583 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1586 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG],
1587 macsec_genl_sa_policy))
1593 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1595 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1598 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG],
1599 macsec_genl_rxsc_policy))
1605 static bool validate_add_rxsa(struct nlattr **attrs)
1607 if (!attrs[MACSEC_SA_ATTR_AN] ||
1608 !attrs[MACSEC_SA_ATTR_KEY] ||
1609 !attrs[MACSEC_SA_ATTR_KEYID])
1612 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1615 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1618 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1619 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1623 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1629 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1631 struct net_device *dev;
1632 struct nlattr **attrs = info->attrs;
1633 struct macsec_secy *secy;
1634 struct macsec_rx_sc *rx_sc;
1635 struct macsec_rx_sa *rx_sa;
1636 unsigned char assoc_num;
1637 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1638 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1641 if (!attrs[MACSEC_ATTR_IFINDEX])
1644 if (parse_sa_config(attrs, tb_sa))
1647 if (parse_rxsc_config(attrs, tb_rxsc))
1650 if (!validate_add_rxsa(tb_sa))
1654 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1655 if (IS_ERR(rx_sc)) {
1657 return PTR_ERR(rx_sc);
1660 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1662 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1663 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1664 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1669 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1675 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1681 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1682 secy->key_len, secy->icv_len);
1689 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1690 spin_lock_bh(&rx_sa->lock);
1691 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1692 spin_unlock_bh(&rx_sa->lock);
1695 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1696 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1698 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1700 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1707 static bool validate_add_rxsc(struct nlattr **attrs)
1709 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1712 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1713 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1720 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1722 struct net_device *dev;
1723 sci_t sci = MACSEC_UNDEF_SCI;
1724 struct nlattr **attrs = info->attrs;
1725 struct macsec_rx_sc *rx_sc;
1726 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1728 if (!attrs[MACSEC_ATTR_IFINDEX])
1731 if (parse_rxsc_config(attrs, tb_rxsc))
1734 if (!validate_add_rxsc(tb_rxsc))
1738 dev = get_dev_from_nl(genl_info_net(info), attrs);
1741 return PTR_ERR(dev);
1744 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1746 rx_sc = create_rx_sc(dev, sci);
1747 if (IS_ERR(rx_sc)) {
1749 return PTR_ERR(rx_sc);
1752 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1753 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1760 static bool validate_add_txsa(struct nlattr **attrs)
1762 if (!attrs[MACSEC_SA_ATTR_AN] ||
1763 !attrs[MACSEC_SA_ATTR_PN] ||
1764 !attrs[MACSEC_SA_ATTR_KEY] ||
1765 !attrs[MACSEC_SA_ATTR_KEYID])
1768 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1771 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1774 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1775 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1779 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1785 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1787 struct net_device *dev;
1788 struct nlattr **attrs = info->attrs;
1789 struct macsec_secy *secy;
1790 struct macsec_tx_sc *tx_sc;
1791 struct macsec_tx_sa *tx_sa;
1792 unsigned char assoc_num;
1793 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1796 if (!attrs[MACSEC_ATTR_IFINDEX])
1799 if (parse_sa_config(attrs, tb_sa))
1802 if (!validate_add_txsa(tb_sa))
1806 dev = get_dev_from_nl(genl_info_net(info), attrs);
1809 return PTR_ERR(dev);
1812 secy = &macsec_priv(dev)->secy;
1813 tx_sc = &secy->tx_sc;
1815 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1817 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1818 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1819 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1824 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1830 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1836 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1837 secy->key_len, secy->icv_len);
1844 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1846 spin_lock_bh(&tx_sa->lock);
1847 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1848 spin_unlock_bh(&tx_sa->lock);
1850 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1851 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1853 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1854 secy->operational = true;
1856 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1863 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1865 struct nlattr **attrs = info->attrs;
1866 struct net_device *dev;
1867 struct macsec_secy *secy;
1868 struct macsec_rx_sc *rx_sc;
1869 struct macsec_rx_sa *rx_sa;
1871 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1872 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1874 if (!attrs[MACSEC_ATTR_IFINDEX])
1877 if (parse_sa_config(attrs, tb_sa))
1880 if (parse_rxsc_config(attrs, tb_rxsc))
1884 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1885 &dev, &secy, &rx_sc, &assoc_num);
1886 if (IS_ERR(rx_sa)) {
1888 return PTR_ERR(rx_sa);
1891 if (rx_sa->active) {
1896 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1904 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1906 struct nlattr **attrs = info->attrs;
1907 struct net_device *dev;
1908 struct macsec_secy *secy;
1909 struct macsec_rx_sc *rx_sc;
1911 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1913 if (!attrs[MACSEC_ATTR_IFINDEX])
1916 if (parse_rxsc_config(attrs, tb_rxsc))
1919 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1923 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1926 return PTR_ERR(dev);
1929 secy = &macsec_priv(dev)->secy;
1930 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1932 rx_sc = del_rx_sc(secy, sci);
1944 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1946 struct nlattr **attrs = info->attrs;
1947 struct net_device *dev;
1948 struct macsec_secy *secy;
1949 struct macsec_tx_sc *tx_sc;
1950 struct macsec_tx_sa *tx_sa;
1952 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1954 if (!attrs[MACSEC_ATTR_IFINDEX])
1957 if (parse_sa_config(attrs, tb_sa))
1961 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1962 &dev, &secy, &tx_sc, &assoc_num);
1963 if (IS_ERR(tx_sa)) {
1965 return PTR_ERR(tx_sa);
1968 if (tx_sa->active) {
1973 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
1981 static bool validate_upd_sa(struct nlattr **attrs)
1983 if (!attrs[MACSEC_SA_ATTR_AN] ||
1984 attrs[MACSEC_SA_ATTR_KEY] ||
1985 attrs[MACSEC_SA_ATTR_KEYID])
1988 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1991 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1994 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1995 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2002 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2004 struct nlattr **attrs = info->attrs;
2005 struct net_device *dev;
2006 struct macsec_secy *secy;
2007 struct macsec_tx_sc *tx_sc;
2008 struct macsec_tx_sa *tx_sa;
2010 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2012 if (!attrs[MACSEC_ATTR_IFINDEX])
2015 if (parse_sa_config(attrs, tb_sa))
2018 if (!validate_upd_sa(tb_sa))
2022 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2023 &dev, &secy, &tx_sc, &assoc_num);
2024 if (IS_ERR(tx_sa)) {
2026 return PTR_ERR(tx_sa);
2029 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2030 spin_lock_bh(&tx_sa->lock);
2031 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2032 spin_unlock_bh(&tx_sa->lock);
2035 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2036 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2038 if (assoc_num == tx_sc->encoding_sa)
2039 secy->operational = tx_sa->active;
2046 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2048 struct nlattr **attrs = info->attrs;
2049 struct net_device *dev;
2050 struct macsec_secy *secy;
2051 struct macsec_rx_sc *rx_sc;
2052 struct macsec_rx_sa *rx_sa;
2054 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2055 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2057 if (!attrs[MACSEC_ATTR_IFINDEX])
2060 if (parse_rxsc_config(attrs, tb_rxsc))
2063 if (parse_sa_config(attrs, tb_sa))
2066 if (!validate_upd_sa(tb_sa))
2070 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2071 &dev, &secy, &rx_sc, &assoc_num);
2072 if (IS_ERR(rx_sa)) {
2074 return PTR_ERR(rx_sa);
2077 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2078 spin_lock_bh(&rx_sa->lock);
2079 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2080 spin_unlock_bh(&rx_sa->lock);
2083 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2084 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2090 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2092 struct nlattr **attrs = info->attrs;
2093 struct net_device *dev;
2094 struct macsec_secy *secy;
2095 struct macsec_rx_sc *rx_sc;
2096 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2098 if (!attrs[MACSEC_ATTR_IFINDEX])
2101 if (parse_rxsc_config(attrs, tb_rxsc))
2104 if (!validate_add_rxsc(tb_rxsc))
2108 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2109 if (IS_ERR(rx_sc)) {
2111 return PTR_ERR(rx_sc);
2114 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2115 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2117 if (rx_sc->active != new)
2118 secy->n_rx_sc += new ? 1 : -1;
2120 rx_sc->active = new;
2128 static int copy_tx_sa_stats(struct sk_buff *skb,
2129 struct macsec_tx_sa_stats __percpu *pstats)
2131 struct macsec_tx_sa_stats sum = {0, };
2134 for_each_possible_cpu(cpu) {
2135 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2137 sum.OutPktsProtected += stats->OutPktsProtected;
2138 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2141 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2142 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2148 static int copy_rx_sa_stats(struct sk_buff *skb,
2149 struct macsec_rx_sa_stats __percpu *pstats)
2151 struct macsec_rx_sa_stats sum = {0, };
2154 for_each_possible_cpu(cpu) {
2155 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2157 sum.InPktsOK += stats->InPktsOK;
2158 sum.InPktsInvalid += stats->InPktsInvalid;
2159 sum.InPktsNotValid += stats->InPktsNotValid;
2160 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2161 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2164 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2165 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2166 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2167 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2168 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2174 static int copy_rx_sc_stats(struct sk_buff *skb,
2175 struct pcpu_rx_sc_stats __percpu *pstats)
2177 struct macsec_rx_sc_stats sum = {0, };
2180 for_each_possible_cpu(cpu) {
2181 const struct pcpu_rx_sc_stats *stats;
2182 struct macsec_rx_sc_stats tmp;
2185 stats = per_cpu_ptr(pstats, cpu);
2187 start = u64_stats_fetch_begin_irq(&stats->syncp);
2188 memcpy(&tmp, &stats->stats, sizeof(tmp));
2189 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2191 sum.InOctetsValidated += tmp.InOctetsValidated;
2192 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2193 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2194 sum.InPktsDelayed += tmp.InPktsDelayed;
2195 sum.InPktsOK += tmp.InPktsOK;
2196 sum.InPktsInvalid += tmp.InPktsInvalid;
2197 sum.InPktsLate += tmp.InPktsLate;
2198 sum.InPktsNotValid += tmp.InPktsNotValid;
2199 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2200 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2203 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2204 sum.InOctetsValidated,
2205 MACSEC_RXSC_STATS_ATTR_PAD) ||
2206 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2207 sum.InOctetsDecrypted,
2208 MACSEC_RXSC_STATS_ATTR_PAD) ||
2209 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2210 sum.InPktsUnchecked,
2211 MACSEC_RXSC_STATS_ATTR_PAD) ||
2212 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2214 MACSEC_RXSC_STATS_ATTR_PAD) ||
2215 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2217 MACSEC_RXSC_STATS_ATTR_PAD) ||
2218 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2220 MACSEC_RXSC_STATS_ATTR_PAD) ||
2221 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2223 MACSEC_RXSC_STATS_ATTR_PAD) ||
2224 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2226 MACSEC_RXSC_STATS_ATTR_PAD) ||
2227 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2228 sum.InPktsNotUsingSA,
2229 MACSEC_RXSC_STATS_ATTR_PAD) ||
2230 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2232 MACSEC_RXSC_STATS_ATTR_PAD))
2238 static int copy_tx_sc_stats(struct sk_buff *skb,
2239 struct pcpu_tx_sc_stats __percpu *pstats)
2241 struct macsec_tx_sc_stats sum = {0, };
2244 for_each_possible_cpu(cpu) {
2245 const struct pcpu_tx_sc_stats *stats;
2246 struct macsec_tx_sc_stats tmp;
2249 stats = per_cpu_ptr(pstats, cpu);
2251 start = u64_stats_fetch_begin_irq(&stats->syncp);
2252 memcpy(&tmp, &stats->stats, sizeof(tmp));
2253 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2255 sum.OutPktsProtected += tmp.OutPktsProtected;
2256 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2257 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2258 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2261 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2262 sum.OutPktsProtected,
2263 MACSEC_TXSC_STATS_ATTR_PAD) ||
2264 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2265 sum.OutPktsEncrypted,
2266 MACSEC_TXSC_STATS_ATTR_PAD) ||
2267 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2268 sum.OutOctetsProtected,
2269 MACSEC_TXSC_STATS_ATTR_PAD) ||
2270 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2271 sum.OutOctetsEncrypted,
2272 MACSEC_TXSC_STATS_ATTR_PAD))
2278 static int copy_secy_stats(struct sk_buff *skb,
2279 struct pcpu_secy_stats __percpu *pstats)
2281 struct macsec_dev_stats sum = {0, };
2284 for_each_possible_cpu(cpu) {
2285 const struct pcpu_secy_stats *stats;
2286 struct macsec_dev_stats tmp;
2289 stats = per_cpu_ptr(pstats, cpu);
2291 start = u64_stats_fetch_begin_irq(&stats->syncp);
2292 memcpy(&tmp, &stats->stats, sizeof(tmp));
2293 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2295 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2296 sum.InPktsUntagged += tmp.InPktsUntagged;
2297 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2298 sum.InPktsNoTag += tmp.InPktsNoTag;
2299 sum.InPktsBadTag += tmp.InPktsBadTag;
2300 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2301 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2302 sum.InPktsOverrun += tmp.InPktsOverrun;
2305 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2306 sum.OutPktsUntagged,
2307 MACSEC_SECY_STATS_ATTR_PAD) ||
2308 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2310 MACSEC_SECY_STATS_ATTR_PAD) ||
2311 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2313 MACSEC_SECY_STATS_ATTR_PAD) ||
2314 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2316 MACSEC_SECY_STATS_ATTR_PAD) ||
2317 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2319 MACSEC_SECY_STATS_ATTR_PAD) ||
2320 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2321 sum.InPktsUnknownSCI,
2322 MACSEC_SECY_STATS_ATTR_PAD) ||
2323 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2325 MACSEC_SECY_STATS_ATTR_PAD) ||
2326 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2328 MACSEC_SECY_STATS_ATTR_PAD))
2334 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2336 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2337 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2342 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2343 MACSEC_SECY_ATTR_PAD) ||
2344 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2345 MACSEC_DEFAULT_CIPHER_ID,
2346 MACSEC_SECY_ATTR_PAD) ||
2347 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2348 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2349 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2350 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2351 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2352 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2353 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2354 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2355 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2356 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2359 if (secy->replay_protect) {
2360 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2364 nla_nest_end(skb, secy_nest);
2368 nla_nest_cancel(skb, secy_nest);
2372 static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2373 struct sk_buff *skb, struct netlink_callback *cb)
2375 struct macsec_rx_sc *rx_sc;
2376 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2377 struct nlattr *txsa_list, *rxsc_list;
2380 struct nlattr *attr;
2382 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2383 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2387 genl_dump_check_consistent(cb, hdr, &macsec_fam);
2389 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2390 goto nla_put_failure;
2392 if (nla_put_secy(secy, skb))
2393 goto nla_put_failure;
2395 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2397 goto nla_put_failure;
2398 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2399 nla_nest_cancel(skb, attr);
2400 goto nla_put_failure;
2402 nla_nest_end(skb, attr);
2404 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2406 goto nla_put_failure;
2407 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2408 nla_nest_cancel(skb, attr);
2409 goto nla_put_failure;
2411 nla_nest_end(skb, attr);
2413 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2415 goto nla_put_failure;
2416 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2417 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2418 struct nlattr *txsa_nest;
2423 txsa_nest = nla_nest_start(skb, j++);
2425 nla_nest_cancel(skb, txsa_list);
2426 goto nla_put_failure;
2429 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2430 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2431 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2432 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2433 nla_nest_cancel(skb, txsa_nest);
2434 nla_nest_cancel(skb, txsa_list);
2435 goto nla_put_failure;
2438 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2440 nla_nest_cancel(skb, txsa_nest);
2441 nla_nest_cancel(skb, txsa_list);
2442 goto nla_put_failure;
2444 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2445 nla_nest_cancel(skb, attr);
2446 nla_nest_cancel(skb, txsa_nest);
2447 nla_nest_cancel(skb, txsa_list);
2448 goto nla_put_failure;
2450 nla_nest_end(skb, attr);
2452 nla_nest_end(skb, txsa_nest);
2454 nla_nest_end(skb, txsa_list);
2456 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2458 goto nla_put_failure;
2461 for_each_rxsc_rtnl(secy, rx_sc) {
2463 struct nlattr *rxsa_list;
2464 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2467 nla_nest_cancel(skb, rxsc_list);
2468 goto nla_put_failure;
2471 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2472 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2473 MACSEC_RXSC_ATTR_PAD)) {
2474 nla_nest_cancel(skb, rxsc_nest);
2475 nla_nest_cancel(skb, rxsc_list);
2476 goto nla_put_failure;
2479 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2481 nla_nest_cancel(skb, rxsc_nest);
2482 nla_nest_cancel(skb, rxsc_list);
2483 goto nla_put_failure;
2485 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2486 nla_nest_cancel(skb, attr);
2487 nla_nest_cancel(skb, rxsc_nest);
2488 nla_nest_cancel(skb, rxsc_list);
2489 goto nla_put_failure;
2491 nla_nest_end(skb, attr);
2493 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2495 nla_nest_cancel(skb, rxsc_nest);
2496 nla_nest_cancel(skb, rxsc_list);
2497 goto nla_put_failure;
2500 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2501 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2502 struct nlattr *rxsa_nest;
2507 rxsa_nest = nla_nest_start(skb, k++);
2509 nla_nest_cancel(skb, rxsa_list);
2510 nla_nest_cancel(skb, rxsc_nest);
2511 nla_nest_cancel(skb, rxsc_list);
2512 goto nla_put_failure;
2515 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
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 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2523 nla_nest_cancel(skb, attr);
2524 nla_nest_cancel(skb, rxsa_list);
2525 nla_nest_cancel(skb, rxsc_nest);
2526 nla_nest_cancel(skb, rxsc_list);
2527 goto nla_put_failure;
2529 nla_nest_end(skb, attr);
2531 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2532 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2533 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2534 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2535 nla_nest_cancel(skb, rxsa_nest);
2536 nla_nest_cancel(skb, rxsc_nest);
2537 nla_nest_cancel(skb, rxsc_list);
2538 goto nla_put_failure;
2540 nla_nest_end(skb, rxsa_nest);
2543 nla_nest_end(skb, rxsa_list);
2544 nla_nest_end(skb, rxsc_nest);
2547 nla_nest_end(skb, rxsc_list);
2549 genlmsg_end(skb, hdr);
2554 genlmsg_cancel(skb, hdr);
2558 static int macsec_generation = 1; /* protected by RTNL */
2560 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2562 struct net *net = sock_net(skb->sk);
2563 struct net_device *dev;
2566 dev_idx = cb->args[0];
2571 cb->seq = macsec_generation;
2573 for_each_netdev(net, dev) {
2574 struct macsec_secy *secy;
2579 if (!netif_is_macsec(dev))
2582 secy = &macsec_priv(dev)->secy;
2583 if (dump_secy(secy, dev, skb, cb) < 0)
2595 static const struct genl_ops macsec_genl_ops[] = {
2597 .cmd = MACSEC_CMD_GET_TXSC,
2598 .dumpit = macsec_dump_txsc,
2599 .policy = macsec_genl_policy,
2602 .cmd = MACSEC_CMD_ADD_RXSC,
2603 .doit = macsec_add_rxsc,
2604 .policy = macsec_genl_policy,
2605 .flags = GENL_ADMIN_PERM,
2608 .cmd = MACSEC_CMD_DEL_RXSC,
2609 .doit = macsec_del_rxsc,
2610 .policy = macsec_genl_policy,
2611 .flags = GENL_ADMIN_PERM,
2614 .cmd = MACSEC_CMD_UPD_RXSC,
2615 .doit = macsec_upd_rxsc,
2616 .policy = macsec_genl_policy,
2617 .flags = GENL_ADMIN_PERM,
2620 .cmd = MACSEC_CMD_ADD_TXSA,
2621 .doit = macsec_add_txsa,
2622 .policy = macsec_genl_policy,
2623 .flags = GENL_ADMIN_PERM,
2626 .cmd = MACSEC_CMD_DEL_TXSA,
2627 .doit = macsec_del_txsa,
2628 .policy = macsec_genl_policy,
2629 .flags = GENL_ADMIN_PERM,
2632 .cmd = MACSEC_CMD_UPD_TXSA,
2633 .doit = macsec_upd_txsa,
2634 .policy = macsec_genl_policy,
2635 .flags = GENL_ADMIN_PERM,
2638 .cmd = MACSEC_CMD_ADD_RXSA,
2639 .doit = macsec_add_rxsa,
2640 .policy = macsec_genl_policy,
2641 .flags = GENL_ADMIN_PERM,
2644 .cmd = MACSEC_CMD_DEL_RXSA,
2645 .doit = macsec_del_rxsa,
2646 .policy = macsec_genl_policy,
2647 .flags = GENL_ADMIN_PERM,
2650 .cmd = MACSEC_CMD_UPD_RXSA,
2651 .doit = macsec_upd_rxsa,
2652 .policy = macsec_genl_policy,
2653 .flags = GENL_ADMIN_PERM,
2657 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2658 struct net_device *dev)
2660 struct macsec_dev *macsec = netdev_priv(dev);
2661 struct macsec_secy *secy = &macsec->secy;
2662 struct pcpu_secy_stats *secy_stats;
2666 if (!secy->protect_frames) {
2667 secy_stats = this_cpu_ptr(macsec->stats);
2668 u64_stats_update_begin(&secy_stats->syncp);
2669 secy_stats->stats.OutPktsUntagged++;
2670 u64_stats_update_end(&secy_stats->syncp);
2671 skb->dev = macsec->real_dev;
2673 ret = dev_queue_xmit(skb);
2674 count_tx(dev, ret, len);
2678 if (!secy->operational) {
2680 dev->stats.tx_dropped++;
2681 return NETDEV_TX_OK;
2684 skb = macsec_encrypt(skb, dev);
2686 if (PTR_ERR(skb) != -EINPROGRESS)
2687 dev->stats.tx_dropped++;
2688 return NETDEV_TX_OK;
2691 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2693 macsec_encrypt_finish(skb, dev);
2695 ret = dev_queue_xmit(skb);
2696 count_tx(dev, ret, len);
2700 #define MACSEC_FEATURES \
2701 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2702 static int macsec_dev_init(struct net_device *dev)
2704 struct macsec_dev *macsec = macsec_priv(dev);
2705 struct net_device *real_dev = macsec->real_dev;
2708 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2712 err = gro_cells_init(&macsec->gro_cells, dev);
2714 free_percpu(dev->tstats);
2718 dev->features = real_dev->features & MACSEC_FEATURES;
2719 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2721 dev->needed_headroom = real_dev->needed_headroom +
2722 MACSEC_NEEDED_HEADROOM;
2723 dev->needed_tailroom = real_dev->needed_tailroom +
2724 MACSEC_NEEDED_TAILROOM;
2726 if (is_zero_ether_addr(dev->dev_addr))
2727 eth_hw_addr_inherit(dev, real_dev);
2728 if (is_zero_ether_addr(dev->broadcast))
2729 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2734 static void macsec_dev_uninit(struct net_device *dev)
2736 struct macsec_dev *macsec = macsec_priv(dev);
2738 gro_cells_destroy(&macsec->gro_cells);
2739 free_percpu(dev->tstats);
2742 static netdev_features_t macsec_fix_features(struct net_device *dev,
2743 netdev_features_t features)
2745 struct macsec_dev *macsec = macsec_priv(dev);
2746 struct net_device *real_dev = macsec->real_dev;
2748 features &= (real_dev->features & MACSEC_FEATURES) |
2749 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2750 features |= NETIF_F_LLTX;
2755 static int macsec_dev_open(struct net_device *dev)
2757 struct macsec_dev *macsec = macsec_priv(dev);
2758 struct net_device *real_dev = macsec->real_dev;
2761 if (!(real_dev->flags & IFF_UP))
2764 err = dev_uc_add(real_dev, dev->dev_addr);
2768 if (dev->flags & IFF_ALLMULTI) {
2769 err = dev_set_allmulti(real_dev, 1);
2774 if (dev->flags & IFF_PROMISC) {
2775 err = dev_set_promiscuity(real_dev, 1);
2777 goto clear_allmulti;
2780 if (netif_carrier_ok(real_dev))
2781 netif_carrier_on(dev);
2785 if (dev->flags & IFF_ALLMULTI)
2786 dev_set_allmulti(real_dev, -1);
2788 dev_uc_del(real_dev, dev->dev_addr);
2789 netif_carrier_off(dev);
2793 static int macsec_dev_stop(struct net_device *dev)
2795 struct macsec_dev *macsec = macsec_priv(dev);
2796 struct net_device *real_dev = macsec->real_dev;
2798 netif_carrier_off(dev);
2800 dev_mc_unsync(real_dev, dev);
2801 dev_uc_unsync(real_dev, dev);
2803 if (dev->flags & IFF_ALLMULTI)
2804 dev_set_allmulti(real_dev, -1);
2806 if (dev->flags & IFF_PROMISC)
2807 dev_set_promiscuity(real_dev, -1);
2809 dev_uc_del(real_dev, dev->dev_addr);
2814 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2816 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2818 if (!(dev->flags & IFF_UP))
2821 if (change & IFF_ALLMULTI)
2822 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2824 if (change & IFF_PROMISC)
2825 dev_set_promiscuity(real_dev,
2826 dev->flags & IFF_PROMISC ? 1 : -1);
2829 static void macsec_dev_set_rx_mode(struct net_device *dev)
2831 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2833 dev_mc_sync(real_dev, dev);
2834 dev_uc_sync(real_dev, dev);
2837 static int macsec_set_mac_address(struct net_device *dev, void *p)
2839 struct macsec_dev *macsec = macsec_priv(dev);
2840 struct net_device *real_dev = macsec->real_dev;
2841 struct sockaddr *addr = p;
2844 if (!is_valid_ether_addr(addr->sa_data))
2845 return -EADDRNOTAVAIL;
2847 if (!(dev->flags & IFF_UP))
2850 err = dev_uc_add(real_dev, addr->sa_data);
2854 dev_uc_del(real_dev, dev->dev_addr);
2857 ether_addr_copy(dev->dev_addr, addr->sa_data);
2861 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2863 struct macsec_dev *macsec = macsec_priv(dev);
2864 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2866 if (macsec->real_dev->mtu - extra < new_mtu)
2874 static struct rtnl_link_stats64 *macsec_get_stats64(struct net_device *dev,
2875 struct rtnl_link_stats64 *s)
2882 for_each_possible_cpu(cpu) {
2883 struct pcpu_sw_netstats *stats;
2884 struct pcpu_sw_netstats tmp;
2887 stats = per_cpu_ptr(dev->tstats, cpu);
2889 start = u64_stats_fetch_begin_irq(&stats->syncp);
2890 tmp.rx_packets = stats->rx_packets;
2891 tmp.rx_bytes = stats->rx_bytes;
2892 tmp.tx_packets = stats->tx_packets;
2893 tmp.tx_bytes = stats->tx_bytes;
2894 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2896 s->rx_packets += tmp.rx_packets;
2897 s->rx_bytes += tmp.rx_bytes;
2898 s->tx_packets += tmp.tx_packets;
2899 s->tx_bytes += tmp.tx_bytes;
2902 s->rx_dropped = dev->stats.rx_dropped;
2903 s->tx_dropped = dev->stats.tx_dropped;
2908 static int macsec_get_iflink(const struct net_device *dev)
2910 return macsec_priv(dev)->real_dev->ifindex;
2913 static const struct net_device_ops macsec_netdev_ops = {
2914 .ndo_init = macsec_dev_init,
2915 .ndo_uninit = macsec_dev_uninit,
2916 .ndo_open = macsec_dev_open,
2917 .ndo_stop = macsec_dev_stop,
2918 .ndo_fix_features = macsec_fix_features,
2919 .ndo_change_mtu = macsec_change_mtu,
2920 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2921 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2922 .ndo_set_mac_address = macsec_set_mac_address,
2923 .ndo_start_xmit = macsec_start_xmit,
2924 .ndo_get_stats64 = macsec_get_stats64,
2925 .ndo_get_iflink = macsec_get_iflink,
2928 static const struct device_type macsec_type = {
2932 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2933 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2934 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2935 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2936 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2937 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2938 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2939 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2940 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2941 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2942 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2943 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2944 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2947 static void macsec_free_netdev(struct net_device *dev)
2949 struct macsec_dev *macsec = macsec_priv(dev);
2950 struct net_device *real_dev = macsec->real_dev;
2952 free_percpu(macsec->stats);
2953 free_percpu(macsec->secy.tx_sc.stats);
2959 static void macsec_setup(struct net_device *dev)
2962 dev->priv_flags |= IFF_NO_QUEUE;
2963 dev->netdev_ops = &macsec_netdev_ops;
2964 dev->destructor = macsec_free_netdev;
2966 eth_zero_addr(dev->broadcast);
2969 static void macsec_changelink_common(struct net_device *dev,
2970 struct nlattr *data[])
2972 struct macsec_secy *secy;
2973 struct macsec_tx_sc *tx_sc;
2975 secy = &macsec_priv(dev)->secy;
2976 tx_sc = &secy->tx_sc;
2978 if (data[IFLA_MACSEC_ENCODING_SA]) {
2979 struct macsec_tx_sa *tx_sa;
2981 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
2982 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
2984 secy->operational = tx_sa && tx_sa->active;
2987 if (data[IFLA_MACSEC_WINDOW])
2988 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
2990 if (data[IFLA_MACSEC_ENCRYPT])
2991 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
2993 if (data[IFLA_MACSEC_PROTECT])
2994 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
2996 if (data[IFLA_MACSEC_INC_SCI])
2997 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
2999 if (data[IFLA_MACSEC_ES])
3000 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3002 if (data[IFLA_MACSEC_SCB])
3003 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3005 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3006 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3008 if (data[IFLA_MACSEC_VALIDATION])
3009 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3012 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3013 struct nlattr *data[])
3018 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3019 data[IFLA_MACSEC_ICV_LEN] ||
3020 data[IFLA_MACSEC_SCI] ||
3021 data[IFLA_MACSEC_PORT])
3024 macsec_changelink_common(dev, data);
3029 static void macsec_del_dev(struct macsec_dev *macsec)
3033 while (macsec->secy.rx_sc) {
3034 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3036 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3040 for (i = 0; i < MACSEC_NUM_AN; i++) {
3041 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3044 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3050 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3052 struct macsec_dev *macsec = macsec_priv(dev);
3053 struct net_device *real_dev = macsec->real_dev;
3054 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3056 macsec_generation++;
3058 unregister_netdevice_queue(dev, head);
3059 list_del_rcu(&macsec->secys);
3060 if (list_empty(&rxd->secys)) {
3061 netdev_rx_handler_unregister(real_dev);
3065 macsec_del_dev(macsec);
3068 static int register_macsec_dev(struct net_device *real_dev,
3069 struct net_device *dev)
3071 struct macsec_dev *macsec = macsec_priv(dev);
3072 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3077 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3081 INIT_LIST_HEAD(&rxd->secys);
3083 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3091 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3095 static bool sci_exists(struct net_device *dev, sci_t sci)
3097 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3098 struct macsec_dev *macsec;
3100 list_for_each_entry(macsec, &rxd->secys, secys) {
3101 if (macsec->secy.sci == sci)
3108 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3110 return make_sci(dev->dev_addr, port);
3113 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3115 struct macsec_dev *macsec = macsec_priv(dev);
3116 struct macsec_secy *secy = &macsec->secy;
3118 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3122 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3123 if (!secy->tx_sc.stats) {
3124 free_percpu(macsec->stats);
3128 if (sci == MACSEC_UNDEF_SCI)
3129 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3132 secy->operational = true;
3133 secy->key_len = DEFAULT_SAK_LEN;
3134 secy->icv_len = icv_len;
3135 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3136 secy->protect_frames = true;
3137 secy->replay_protect = false;
3140 secy->tx_sc.active = true;
3141 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3142 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3143 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3144 secy->tx_sc.end_station = false;
3145 secy->tx_sc.scb = false;
3150 static int macsec_newlink(struct net *net, struct net_device *dev,
3151 struct nlattr *tb[], struct nlattr *data[])
3153 struct macsec_dev *macsec = macsec_priv(dev);
3154 struct net_device *real_dev;
3157 u8 icv_len = DEFAULT_ICV_LEN;
3158 rx_handler_func_t *rx_handler;
3162 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3166 dev->priv_flags |= IFF_MACSEC;
3168 macsec->real_dev = real_dev;
3170 if (data && data[IFLA_MACSEC_ICV_LEN])
3171 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3172 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3174 rx_handler = rtnl_dereference(real_dev->rx_handler);
3175 if (rx_handler && rx_handler != macsec_handle_frame)
3178 err = register_netdevice(dev);
3184 /* need to be already registered so that ->init has run and
3185 * the MAC addr is set
3187 if (data && data[IFLA_MACSEC_SCI])
3188 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3189 else if (data && data[IFLA_MACSEC_PORT])
3190 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3192 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3194 if (rx_handler && sci_exists(real_dev, sci)) {
3199 err = macsec_add_dev(dev, sci, icv_len);
3204 macsec_changelink_common(dev, data);
3206 err = register_macsec_dev(real_dev, dev);
3210 macsec_generation++;
3215 macsec_del_dev(macsec);
3217 unregister_netdevice(dev);
3221 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[])
3223 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3224 u8 icv_len = DEFAULT_ICV_LEN;
3231 if (data[IFLA_MACSEC_CIPHER_SUITE])
3232 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3234 if (data[IFLA_MACSEC_ICV_LEN]) {
3235 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3236 if (icv_len != DEFAULT_ICV_LEN) {
3237 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3238 struct crypto_aead *dummy_tfm;
3240 dummy_tfm = macsec_alloc_tfm(dummy_key,
3243 if (IS_ERR(dummy_tfm))
3244 return PTR_ERR(dummy_tfm);
3245 crypto_free_aead(dummy_tfm);
3250 case MACSEC_DEFAULT_CIPHER_ID:
3251 case MACSEC_DEFAULT_CIPHER_ALT:
3252 if (icv_len < MACSEC_MIN_ICV_LEN ||
3253 icv_len > MACSEC_STD_ICV_LEN)
3260 if (data[IFLA_MACSEC_ENCODING_SA]) {
3261 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3265 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3266 flag < IFLA_MACSEC_VALIDATION;
3269 if (nla_get_u8(data[flag]) > 1)
3274 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3275 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3276 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3278 if ((sci && (scb || es)) || (scb && es))
3281 if (data[IFLA_MACSEC_VALIDATION] &&
3282 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3285 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3286 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3287 !data[IFLA_MACSEC_WINDOW])
3293 static struct net *macsec_get_link_net(const struct net_device *dev)
3295 return dev_net(macsec_priv(dev)->real_dev);
3298 static size_t macsec_get_size(const struct net_device *dev)
3301 nla_total_size_64bit(8) + /* SCI */
3302 nla_total_size(1) + /* ICV_LEN */
3303 nla_total_size_64bit(8) + /* CIPHER_SUITE */
3304 nla_total_size(4) + /* WINDOW */
3305 nla_total_size(1) + /* ENCODING_SA */
3306 nla_total_size(1) + /* ENCRYPT */
3307 nla_total_size(1) + /* PROTECT */
3308 nla_total_size(1) + /* INC_SCI */
3309 nla_total_size(1) + /* ES */
3310 nla_total_size(1) + /* SCB */
3311 nla_total_size(1) + /* REPLAY_PROTECT */
3312 nla_total_size(1) + /* VALIDATION */
3316 static int macsec_fill_info(struct sk_buff *skb,
3317 const struct net_device *dev)
3319 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3320 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3322 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3324 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3325 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3326 MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) ||
3327 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3328 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3329 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3330 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3331 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3332 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3333 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3334 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3336 goto nla_put_failure;
3338 if (secy->replay_protect) {
3339 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3340 goto nla_put_failure;
3349 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3351 .priv_size = sizeof(struct macsec_dev),
3352 .maxtype = IFLA_MACSEC_MAX,
3353 .policy = macsec_rtnl_policy,
3354 .setup = macsec_setup,
3355 .validate = macsec_validate_attr,
3356 .newlink = macsec_newlink,
3357 .changelink = macsec_changelink,
3358 .dellink = macsec_dellink,
3359 .get_size = macsec_get_size,
3360 .fill_info = macsec_fill_info,
3361 .get_link_net = macsec_get_link_net,
3364 static bool is_macsec_master(struct net_device *dev)
3366 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3369 static int macsec_notify(struct notifier_block *this, unsigned long event,
3372 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3375 if (!is_macsec_master(real_dev))
3379 case NETDEV_UNREGISTER: {
3380 struct macsec_dev *m, *n;
3381 struct macsec_rxh_data *rxd;
3383 rxd = macsec_data_rtnl(real_dev);
3384 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3385 macsec_dellink(m->secy.netdev, &head);
3387 unregister_netdevice_many(&head);
3390 case NETDEV_CHANGEMTU: {
3391 struct macsec_dev *m;
3392 struct macsec_rxh_data *rxd;
3394 rxd = macsec_data_rtnl(real_dev);
3395 list_for_each_entry(m, &rxd->secys, secys) {
3396 struct net_device *dev = m->secy.netdev;
3397 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3398 macsec_extra_len(true));
3401 dev_set_mtu(dev, mtu);
3409 static struct notifier_block macsec_notifier = {
3410 .notifier_call = macsec_notify,
3413 static int __init macsec_init(void)
3417 pr_info("MACsec IEEE 802.1AE\n");
3418 err = register_netdevice_notifier(&macsec_notifier);
3422 err = rtnl_link_register(&macsec_link_ops);
3426 err = genl_register_family_with_ops(&macsec_fam, macsec_genl_ops);
3433 rtnl_link_unregister(&macsec_link_ops);
3435 unregister_netdevice_notifier(&macsec_notifier);
3439 static void __exit macsec_exit(void)
3441 genl_unregister_family(&macsec_fam);
3442 rtnl_link_unregister(&macsec_link_ops);
3443 unregister_netdevice_notifier(&macsec_notifier);
3447 module_init(macsec_init);
3448 module_exit(macsec_exit);
3450 MODULE_ALIAS_RTNL_LINK("macsec");
3452 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3453 MODULE_LICENSE("GPL v2");