2 * drivers/net/macsec.c - MACsec device
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/types.h>
13 #include <linux/skbuff.h>
14 #include <linux/socket.h>
15 #include <linux/module.h>
16 #include <crypto/aead.h>
17 #include <linux/etherdevice.h>
18 #include <linux/rtnetlink.h>
19 #include <net/genetlink.h>
21 #include <net/gro_cells.h>
23 #include <uapi/linux/if_macsec.h>
25 typedef u64 __bitwise sci_t;
27 #define MACSEC_SCI_LEN 8
29 /* SecTAG length = macsec_eth_header without the optional SCI */
30 #define MACSEC_TAG_LEN 6
32 struct macsec_eth_header {
36 #if defined(__LITTLE_ENDIAN_BITFIELD)
39 #elif defined(__BIG_ENDIAN_BITFIELD)
43 #error "Please fix <asm/byteorder.h>"
46 u8 secure_channel_id[8]; /* optional */
49 #define MACSEC_TCI_VERSION 0x80
50 #define MACSEC_TCI_ES 0x40 /* end station */
51 #define MACSEC_TCI_SC 0x20 /* SCI present */
52 #define MACSEC_TCI_SCB 0x10 /* epon */
53 #define MACSEC_TCI_E 0x08 /* encryption */
54 #define MACSEC_TCI_C 0x04 /* changed text */
55 #define MACSEC_AN_MASK 0x03 /* association number */
56 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
58 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59 #define MIN_NON_SHORT_LEN 48
61 #define GCM_AES_IV_LEN 12
62 #define DEFAULT_ICV_LEN 16
64 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
66 #define for_each_rxsc(secy, sc) \
67 for (sc = rcu_dereference_bh(secy->rx_sc); \
69 sc = rcu_dereference_bh(sc->next))
70 #define for_each_rxsc_rtnl(secy, sc) \
71 for (sc = rtnl_dereference(secy->rx_sc); \
73 sc = rtnl_dereference(sc->next))
77 u8 secure_channel_id[8];
84 * struct macsec_key - SA key
85 * @id: user-provided key identifier
86 * @tfm: crypto struct, key storage
89 u8 id[MACSEC_KEYID_LEN];
90 struct crypto_aead *tfm;
93 struct macsec_rx_sc_stats {
94 __u64 InOctetsValidated;
95 __u64 InOctetsDecrypted;
96 __u64 InPktsUnchecked;
101 __u64 InPktsNotValid;
102 __u64 InPktsNotUsingSA;
103 __u64 InPktsUnusedSA;
106 struct macsec_rx_sa_stats {
109 __u32 InPktsNotValid;
110 __u32 InPktsNotUsingSA;
111 __u32 InPktsUnusedSA;
114 struct macsec_tx_sa_stats {
115 __u32 OutPktsProtected;
116 __u32 OutPktsEncrypted;
119 struct macsec_tx_sc_stats {
120 __u64 OutPktsProtected;
121 __u64 OutPktsEncrypted;
122 __u64 OutOctetsProtected;
123 __u64 OutOctetsEncrypted;
126 struct macsec_dev_stats {
127 __u64 OutPktsUntagged;
128 __u64 InPktsUntagged;
129 __u64 OutPktsTooLong;
132 __u64 InPktsUnknownSCI;
138 * struct macsec_rx_sa - receive secure association
140 * @next_pn: packet number expected for the next packet
141 * @lock: protects next_pn manipulations
142 * @key: key structure
143 * @stats: per-SA stats
145 struct macsec_rx_sa {
146 struct macsec_key key;
151 struct macsec_rx_sa_stats __percpu *stats;
152 struct macsec_rx_sc *sc;
156 struct pcpu_rx_sc_stats {
157 struct macsec_rx_sc_stats stats;
158 struct u64_stats_sync syncp;
162 * struct macsec_rx_sc - receive secure channel
163 * @sci: secure channel identifier for this SC
164 * @active: channel is active
165 * @sa: array of secure associations
166 * @stats: per-SC stats
168 struct macsec_rx_sc {
169 struct macsec_rx_sc __rcu *next;
172 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
173 struct pcpu_rx_sc_stats __percpu *stats;
175 struct rcu_head rcu_head;
179 * struct macsec_tx_sa - transmit secure association
181 * @next_pn: packet number to use for the next packet
182 * @lock: protects next_pn manipulations
183 * @key: key structure
184 * @stats: per-SA stats
186 struct macsec_tx_sa {
187 struct macsec_key key;
192 struct macsec_tx_sa_stats __percpu *stats;
196 struct pcpu_tx_sc_stats {
197 struct macsec_tx_sc_stats stats;
198 struct u64_stats_sync syncp;
202 * struct macsec_tx_sc - transmit secure channel
204 * @encoding_sa: association number of the SA currently in use
205 * @encrypt: encrypt packets on transmit, or authenticate only
206 * @send_sci: always include the SCI in the SecTAG
208 * @scb: single copy broadcast flag
209 * @sa: array of secure associations
210 * @stats: stats for this TXSC
212 struct macsec_tx_sc {
219 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
220 struct pcpu_tx_sc_stats __percpu *stats;
223 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
226 * struct macsec_secy - MACsec Security Entity
227 * @netdev: netdevice for this SecY
228 * @n_rx_sc: number of receive secure channels configured on this SecY
229 * @sci: secure channel identifier used for tx
230 * @key_len: length of keys used by the cipher suite
231 * @icv_len: length of ICV used by the cipher suite
232 * @validate_frames: validation mode
233 * @operational: MAC_Operational flag
234 * @protect_frames: enable protection for this SecY
235 * @replay_protect: enable packet number checks on receive
236 * @replay_window: size of the replay window
237 * @tx_sc: transmit secure channel
238 * @rx_sc: linked list of receive secure channels
241 struct net_device *netdev;
242 unsigned int n_rx_sc;
246 enum macsec_validation_type validate_frames;
251 struct macsec_tx_sc tx_sc;
252 struct macsec_rx_sc __rcu *rx_sc;
255 struct pcpu_secy_stats {
256 struct macsec_dev_stats stats;
257 struct u64_stats_sync syncp;
261 * struct macsec_dev - private data
263 * @real_dev: pointer to underlying netdevice
264 * @stats: MACsec device stats
265 * @secys: linked list of SecY's on the underlying device
268 struct macsec_secy secy;
269 struct net_device *real_dev;
270 struct pcpu_secy_stats __percpu *stats;
271 struct list_head secys;
272 struct gro_cells gro_cells;
273 unsigned int nest_level;
277 * struct macsec_rxh_data - rx_handler private argument
278 * @secys: linked list of SecY's on this underlying device
280 struct macsec_rxh_data {
281 struct list_head secys;
284 static struct macsec_dev *macsec_priv(const struct net_device *dev)
286 return (struct macsec_dev *)netdev_priv(dev);
289 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
291 return rcu_dereference_bh(dev->rx_handler_data);
294 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
296 return rtnl_dereference(dev->rx_handler_data);
300 struct aead_request *req;
302 struct macsec_tx_sa *tx_sa;
303 struct macsec_rx_sa *rx_sa;
310 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
312 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
314 if (!sa || !sa->active)
317 if (!atomic_inc_not_zero(&sa->refcnt))
323 static void free_rx_sc_rcu(struct rcu_head *head)
325 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
327 free_percpu(rx_sc->stats);
331 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
333 return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL;
336 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
338 if (atomic_dec_and_test(&sc->refcnt))
339 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
342 static void free_rxsa(struct rcu_head *head)
344 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
346 crypto_free_aead(sa->key.tfm);
347 free_percpu(sa->stats);
351 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
353 if (atomic_dec_and_test(&sa->refcnt))
354 call_rcu(&sa->rcu, free_rxsa);
357 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
359 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
361 if (!sa || !sa->active)
364 if (!atomic_inc_not_zero(&sa->refcnt))
370 static void free_txsa(struct rcu_head *head)
372 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
374 crypto_free_aead(sa->key.tfm);
375 free_percpu(sa->stats);
379 static void macsec_txsa_put(struct macsec_tx_sa *sa)
381 if (atomic_dec_and_test(&sa->refcnt))
382 call_rcu(&sa->rcu, free_txsa);
385 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
387 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
388 return (struct macsec_cb *)skb->cb;
391 #define MACSEC_PORT_ES (htons(0x0001))
392 #define MACSEC_PORT_SCB (0x0000)
393 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
395 #define DEFAULT_SAK_LEN 16
396 #define DEFAULT_SEND_SCI true
397 #define DEFAULT_ENCRYPT false
398 #define DEFAULT_ENCODING_SA 0
400 static bool send_sci(const struct macsec_secy *secy)
402 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
404 return tx_sc->send_sci ||
405 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
408 static sci_t make_sci(u8 *addr, __be16 port)
412 memcpy(&sci, addr, ETH_ALEN);
413 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
418 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
423 memcpy(&sci, hdr->secure_channel_id,
424 sizeof(hdr->secure_channel_id));
426 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
431 static unsigned int macsec_sectag_len(bool sci_present)
433 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
436 static unsigned int macsec_hdr_len(bool sci_present)
438 return macsec_sectag_len(sci_present) + ETH_HLEN;
441 static unsigned int macsec_extra_len(bool sci_present)
443 return macsec_sectag_len(sci_present) + sizeof(__be16);
446 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
447 static void macsec_fill_sectag(struct macsec_eth_header *h,
448 const struct macsec_secy *secy, u32 pn,
451 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
453 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
454 h->eth.h_proto = htons(ETH_P_MACSEC);
457 h->tci_an |= MACSEC_TCI_SC;
458 memcpy(&h->secure_channel_id, &secy->sci,
459 sizeof(h->secure_channel_id));
461 if (tx_sc->end_station)
462 h->tci_an |= MACSEC_TCI_ES;
464 h->tci_an |= MACSEC_TCI_SCB;
467 h->packet_number = htonl(pn);
469 /* with GCM, C/E clear for !encrypt, both set for encrypt */
471 h->tci_an |= MACSEC_TCI_CONFID;
472 else if (secy->icv_len != DEFAULT_ICV_LEN)
473 h->tci_an |= MACSEC_TCI_C;
475 h->tci_an |= tx_sc->encoding_sa;
478 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
480 if (data_len < MIN_NON_SHORT_LEN)
481 h->short_length = data_len;
484 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
485 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
487 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
488 int len = skb->len - 2 * ETH_ALEN;
489 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
491 /* a) It comprises at least 17 octets */
495 /* b) MACsec EtherType: already checked */
497 /* c) V bit is clear */
498 if (h->tci_an & MACSEC_TCI_VERSION)
501 /* d) ES or SCB => !SC */
502 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
503 (h->tci_an & MACSEC_TCI_SC))
506 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
510 /* rx.pn != 0 (figure 10-5) */
511 if (!h->packet_number)
514 /* length check, f) g) h) i) */
516 return len == extra_len + h->short_length;
517 return len >= extra_len + MIN_NON_SHORT_LEN;
520 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
521 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
523 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
525 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
528 gcm_iv->pn = htonl(pn);
531 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
533 return (struct macsec_eth_header *)skb_mac_header(skb);
536 static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
540 spin_lock_bh(&tx_sa->lock);
544 if (tx_sa->next_pn == 0) {
545 pr_debug("PN wrapped, transitioning to !oper\n");
546 tx_sa->active = false;
547 if (secy->protect_frames)
548 secy->operational = false;
550 spin_unlock_bh(&tx_sa->lock);
555 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
557 struct macsec_dev *macsec = netdev_priv(dev);
559 skb->dev = macsec->real_dev;
560 skb_reset_mac_header(skb);
561 skb->protocol = eth_hdr(skb)->h_proto;
564 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
565 struct macsec_tx_sa *tx_sa)
567 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
569 u64_stats_update_begin(&txsc_stats->syncp);
570 if (tx_sc->encrypt) {
571 txsc_stats->stats.OutOctetsEncrypted += skb->len;
572 txsc_stats->stats.OutPktsEncrypted++;
573 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
575 txsc_stats->stats.OutOctetsProtected += skb->len;
576 txsc_stats->stats.OutPktsProtected++;
577 this_cpu_inc(tx_sa->stats->OutPktsProtected);
579 u64_stats_update_end(&txsc_stats->syncp);
582 static void count_tx(struct net_device *dev, int ret, int len)
584 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
585 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
587 u64_stats_update_begin(&stats->syncp);
589 stats->tx_bytes += len;
590 u64_stats_update_end(&stats->syncp);
592 dev->stats.tx_dropped++;
596 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
598 struct sk_buff *skb = base->data;
599 struct net_device *dev = skb->dev;
600 struct macsec_dev *macsec = macsec_priv(dev);
601 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
604 aead_request_free(macsec_skb_cb(skb)->req);
607 macsec_encrypt_finish(skb, dev);
608 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
610 ret = dev_queue_xmit(skb);
611 count_tx(dev, ret, len);
612 rcu_read_unlock_bh();
618 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
620 struct scatterlist **sg,
623 size_t size, iv_offset, sg_offset;
624 struct aead_request *req;
627 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
629 size += GCM_AES_IV_LEN;
631 size = ALIGN(size, __alignof__(struct scatterlist));
633 size += sizeof(struct scatterlist) * num_frags;
635 tmp = kmalloc(size, GFP_ATOMIC);
639 *iv = (unsigned char *)(tmp + iv_offset);
640 *sg = (struct scatterlist *)(tmp + sg_offset);
643 aead_request_set_tfm(req, tfm);
648 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
649 struct net_device *dev)
652 struct scatterlist *sg;
653 struct sk_buff *trailer;
656 struct macsec_eth_header *hh;
657 size_t unprotected_len;
658 struct aead_request *req;
659 struct macsec_secy *secy;
660 struct macsec_tx_sc *tx_sc;
661 struct macsec_tx_sa *tx_sa;
662 struct macsec_dev *macsec = macsec_priv(dev);
666 secy = &macsec->secy;
667 tx_sc = &secy->tx_sc;
669 /* 10.5.1 TX SA assignment */
670 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
672 secy->operational = false;
674 return ERR_PTR(-EINVAL);
677 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
678 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
679 struct sk_buff *nskb = skb_copy_expand(skb,
680 MACSEC_NEEDED_HEADROOM,
681 MACSEC_NEEDED_TAILROOM,
687 macsec_txsa_put(tx_sa);
689 return ERR_PTR(-ENOMEM);
692 skb = skb_unshare(skb, GFP_ATOMIC);
694 macsec_txsa_put(tx_sa);
695 return ERR_PTR(-ENOMEM);
699 unprotected_len = skb->len;
701 sci_present = send_sci(secy);
702 hh = (struct macsec_eth_header *)skb_push(skb, macsec_extra_len(sci_present));
703 memmove(hh, eth, 2 * ETH_ALEN);
705 pn = tx_sa_update_pn(tx_sa, secy);
707 macsec_txsa_put(tx_sa);
709 return ERR_PTR(-ENOLINK);
711 macsec_fill_sectag(hh, secy, pn, sci_present);
712 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
714 skb_put(skb, secy->icv_len);
716 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
717 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
719 u64_stats_update_begin(&secy_stats->syncp);
720 secy_stats->stats.OutPktsTooLong++;
721 u64_stats_update_end(&secy_stats->syncp);
723 macsec_txsa_put(tx_sa);
725 return ERR_PTR(-EINVAL);
728 ret = skb_cow_data(skb, 0, &trailer);
729 if (unlikely(ret < 0)) {
730 macsec_txsa_put(tx_sa);
735 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
737 macsec_txsa_put(tx_sa);
739 return ERR_PTR(-ENOMEM);
742 macsec_fill_iv(iv, secy->sci, pn);
744 sg_init_table(sg, ret);
745 skb_to_sgvec(skb, sg, 0, skb->len);
747 if (tx_sc->encrypt) {
748 int len = skb->len - macsec_hdr_len(sci_present) -
750 aead_request_set_crypt(req, sg, sg, len, iv);
751 aead_request_set_ad(req, macsec_hdr_len(sci_present));
753 aead_request_set_crypt(req, sg, sg, 0, iv);
754 aead_request_set_ad(req, skb->len - secy->icv_len);
757 macsec_skb_cb(skb)->req = req;
758 macsec_skb_cb(skb)->tx_sa = tx_sa;
759 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
762 ret = crypto_aead_encrypt(req);
763 if (ret == -EINPROGRESS) {
765 } else if (ret != 0) {
768 aead_request_free(req);
769 macsec_txsa_put(tx_sa);
770 return ERR_PTR(-EINVAL);
774 aead_request_free(req);
775 macsec_txsa_put(tx_sa);
780 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
782 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
783 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
784 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
787 spin_lock(&rx_sa->lock);
788 if (rx_sa->next_pn >= secy->replay_window)
789 lowest_pn = rx_sa->next_pn - secy->replay_window;
791 /* Now perform replay protection check again
792 * (see IEEE 802.1AE-2006 figure 10-5)
794 if (secy->replay_protect && pn < lowest_pn) {
795 spin_unlock(&rx_sa->lock);
796 u64_stats_update_begin(&rxsc_stats->syncp);
797 rxsc_stats->stats.InPktsLate++;
798 u64_stats_update_end(&rxsc_stats->syncp);
802 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
803 u64_stats_update_begin(&rxsc_stats->syncp);
804 if (hdr->tci_an & MACSEC_TCI_E)
805 rxsc_stats->stats.InOctetsDecrypted += skb->len;
807 rxsc_stats->stats.InOctetsValidated += skb->len;
808 u64_stats_update_end(&rxsc_stats->syncp);
811 if (!macsec_skb_cb(skb)->valid) {
812 spin_unlock(&rx_sa->lock);
815 if (hdr->tci_an & MACSEC_TCI_C ||
816 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
817 u64_stats_update_begin(&rxsc_stats->syncp);
818 rxsc_stats->stats.InPktsNotValid++;
819 u64_stats_update_end(&rxsc_stats->syncp);
823 u64_stats_update_begin(&rxsc_stats->syncp);
824 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
825 rxsc_stats->stats.InPktsInvalid++;
826 this_cpu_inc(rx_sa->stats->InPktsInvalid);
827 } else if (pn < lowest_pn) {
828 rxsc_stats->stats.InPktsDelayed++;
830 rxsc_stats->stats.InPktsUnchecked++;
832 u64_stats_update_end(&rxsc_stats->syncp);
834 u64_stats_update_begin(&rxsc_stats->syncp);
835 if (pn < lowest_pn) {
836 rxsc_stats->stats.InPktsDelayed++;
838 rxsc_stats->stats.InPktsOK++;
839 this_cpu_inc(rx_sa->stats->InPktsOK);
841 u64_stats_update_end(&rxsc_stats->syncp);
843 if (pn >= rx_sa->next_pn)
844 rx_sa->next_pn = pn + 1;
845 spin_unlock(&rx_sa->lock);
851 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
853 skb->pkt_type = PACKET_HOST;
854 skb->protocol = eth_type_trans(skb, dev);
856 skb_reset_network_header(skb);
857 if (!skb_transport_header_was_set(skb))
858 skb_reset_transport_header(skb);
859 skb_reset_mac_len(skb);
862 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
864 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
865 skb_pull(skb, hdr_len);
866 pskb_trim_unique(skb, skb->len - icv_len);
869 static void count_rx(struct net_device *dev, int len)
871 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
873 u64_stats_update_begin(&stats->syncp);
875 stats->rx_bytes += len;
876 u64_stats_update_end(&stats->syncp);
879 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
881 struct sk_buff *skb = base->data;
882 struct net_device *dev = skb->dev;
883 struct macsec_dev *macsec = macsec_priv(dev);
884 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
885 struct macsec_rx_sc *rx_sc = rx_sa->sc;
889 aead_request_free(macsec_skb_cb(skb)->req);
892 macsec_skb_cb(skb)->valid = true;
895 pn = ntohl(macsec_ethhdr(skb)->packet_number);
896 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
897 rcu_read_unlock_bh();
902 macsec_finalize_skb(skb, macsec->secy.icv_len,
903 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
904 macsec_reset_skb(skb, macsec->secy.netdev);
907 ret = gro_cells_receive(&macsec->gro_cells, skb);
908 if (ret == NET_RX_SUCCESS)
911 macsec->secy.netdev->stats.rx_dropped++;
913 rcu_read_unlock_bh();
916 macsec_rxsa_put(rx_sa);
917 macsec_rxsc_put(rx_sc);
921 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
922 struct net_device *dev,
923 struct macsec_rx_sa *rx_sa,
925 struct macsec_secy *secy)
928 struct scatterlist *sg;
929 struct sk_buff *trailer;
931 struct aead_request *req;
932 struct macsec_eth_header *hdr;
933 u16 icv_len = secy->icv_len;
935 macsec_skb_cb(skb)->valid = false;
936 skb = skb_share_check(skb, GFP_ATOMIC);
938 return ERR_PTR(-ENOMEM);
940 ret = skb_cow_data(skb, 0, &trailer);
941 if (unlikely(ret < 0)) {
945 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
948 return ERR_PTR(-ENOMEM);
951 hdr = (struct macsec_eth_header *)skb->data;
952 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
954 sg_init_table(sg, ret);
955 skb_to_sgvec(skb, sg, 0, skb->len);
957 if (hdr->tci_an & MACSEC_TCI_E) {
958 /* confidentiality: ethernet + macsec header
959 * authenticated, encrypted payload
961 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
963 aead_request_set_crypt(req, sg, sg, len, iv);
964 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
965 skb = skb_unshare(skb, GFP_ATOMIC);
967 aead_request_free(req);
968 return ERR_PTR(-ENOMEM);
971 /* integrity only: all headers + data authenticated */
972 aead_request_set_crypt(req, sg, sg, icv_len, iv);
973 aead_request_set_ad(req, skb->len - icv_len);
976 macsec_skb_cb(skb)->req = req;
978 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
981 ret = crypto_aead_decrypt(req);
982 if (ret == -EINPROGRESS) {
984 } else if (ret != 0) {
985 /* decryption/authentication failed
986 * 10.6 if validateFrames is disabled, deliver anyway
988 if (ret != -EBADMSG) {
993 macsec_skb_cb(skb)->valid = true;
997 aead_request_free(req);
1002 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
1004 struct macsec_rx_sc *rx_sc;
1006 for_each_rxsc(secy, rx_sc) {
1007 if (rx_sc->sci == sci)
1014 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
1016 struct macsec_rx_sc *rx_sc;
1018 for_each_rxsc_rtnl(secy, rx_sc) {
1019 if (rx_sc->sci == sci)
1026 static void handle_not_macsec(struct sk_buff *skb)
1028 struct macsec_rxh_data *rxd;
1029 struct macsec_dev *macsec;
1032 rxd = macsec_data_rcu(skb->dev);
1034 /* 10.6 If the management control validateFrames is not
1035 * Strict, frames without a SecTAG are received, counted, and
1036 * delivered to the Controlled Port
1038 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1039 struct sk_buff *nskb;
1041 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1043 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1044 u64_stats_update_begin(&secy_stats->syncp);
1045 secy_stats->stats.InPktsNoTag++;
1046 u64_stats_update_end(&secy_stats->syncp);
1050 /* deliver on this port */
1051 nskb = skb_clone(skb, GFP_ATOMIC);
1055 nskb->dev = macsec->secy.netdev;
1057 ret = netif_rx(nskb);
1058 if (ret == NET_RX_SUCCESS) {
1059 u64_stats_update_begin(&secy_stats->syncp);
1060 secy_stats->stats.InPktsUntagged++;
1061 u64_stats_update_end(&secy_stats->syncp);
1063 macsec->secy.netdev->stats.rx_dropped++;
1070 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1072 struct sk_buff *skb = *pskb;
1073 struct net_device *dev = skb->dev;
1074 struct macsec_eth_header *hdr;
1075 struct macsec_secy *secy = NULL;
1076 struct macsec_rx_sc *rx_sc;
1077 struct macsec_rx_sa *rx_sa;
1078 struct macsec_rxh_data *rxd;
1079 struct macsec_dev *macsec;
1083 struct pcpu_rx_sc_stats *rxsc_stats;
1084 struct pcpu_secy_stats *secy_stats;
1088 if (skb_headroom(skb) < ETH_HLEN)
1091 hdr = macsec_ethhdr(skb);
1092 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1093 handle_not_macsec(skb);
1095 /* and deliver to the uncontrolled port */
1096 return RX_HANDLER_PASS;
1099 skb = skb_unshare(skb, GFP_ATOMIC);
1102 return RX_HANDLER_CONSUMED;
1105 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1107 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1111 hdr = macsec_ethhdr(skb);
1113 /* Frames with a SecTAG that has the TCI E bit set but the C
1114 * bit clear are discarded, as this reserved encoding is used
1115 * to identify frames with a SecTAG that are not to be
1116 * delivered to the Controlled Port.
1118 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1119 return RX_HANDLER_PASS;
1121 /* now, pull the extra length */
1122 if (hdr->tci_an & MACSEC_TCI_SC) {
1127 /* ethernet header is part of crypto processing */
1128 skb_push(skb, ETH_HLEN);
1130 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1131 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1132 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1135 rxd = macsec_data_rcu(skb->dev);
1137 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1138 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1139 sc = sc ? macsec_rxsc_get(sc) : NULL;
1142 secy = &macsec->secy;
1152 macsec = macsec_priv(dev);
1153 secy_stats = this_cpu_ptr(macsec->stats);
1154 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1156 if (!macsec_validate_skb(skb, secy->icv_len)) {
1157 u64_stats_update_begin(&secy_stats->syncp);
1158 secy_stats->stats.InPktsBadTag++;
1159 u64_stats_update_end(&secy_stats->syncp);
1163 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1165 /* 10.6.1 if the SA is not in use */
1167 /* If validateFrames is Strict or the C bit in the
1168 * SecTAG is set, discard
1170 if (hdr->tci_an & MACSEC_TCI_C ||
1171 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1172 u64_stats_update_begin(&rxsc_stats->syncp);
1173 rxsc_stats->stats.InPktsNotUsingSA++;
1174 u64_stats_update_end(&rxsc_stats->syncp);
1178 /* not Strict, the frame (with the SecTAG and ICV
1179 * removed) is delivered to the Controlled Port.
1181 u64_stats_update_begin(&rxsc_stats->syncp);
1182 rxsc_stats->stats.InPktsUnusedSA++;
1183 u64_stats_update_end(&rxsc_stats->syncp);
1187 /* First, PN check to avoid decrypting obviously wrong packets */
1188 pn = ntohl(hdr->packet_number);
1189 if (secy->replay_protect) {
1192 spin_lock(&rx_sa->lock);
1193 late = rx_sa->next_pn >= secy->replay_window &&
1194 pn < (rx_sa->next_pn - secy->replay_window);
1195 spin_unlock(&rx_sa->lock);
1198 u64_stats_update_begin(&rxsc_stats->syncp);
1199 rxsc_stats->stats.InPktsLate++;
1200 u64_stats_update_end(&rxsc_stats->syncp);
1205 macsec_skb_cb(skb)->rx_sa = rx_sa;
1207 /* Disabled && !changed text => skip validation */
1208 if (hdr->tci_an & MACSEC_TCI_C ||
1209 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1210 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1213 /* the decrypt callback needs the reference */
1214 if (PTR_ERR(skb) != -EINPROGRESS) {
1215 macsec_rxsa_put(rx_sa);
1216 macsec_rxsc_put(rx_sc);
1220 return RX_HANDLER_CONSUMED;
1223 if (!macsec_post_decrypt(skb, secy, pn))
1227 macsec_finalize_skb(skb, secy->icv_len,
1228 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1229 macsec_reset_skb(skb, secy->netdev);
1232 macsec_rxsa_put(rx_sa);
1233 macsec_rxsc_put(rx_sc);
1235 ret = gro_cells_receive(&macsec->gro_cells, skb);
1236 if (ret == NET_RX_SUCCESS)
1237 count_rx(dev, skb->len);
1239 macsec->secy.netdev->stats.rx_dropped++;
1244 return RX_HANDLER_CONSUMED;
1247 macsec_rxsa_put(rx_sa);
1249 macsec_rxsc_put(rx_sc);
1254 return RX_HANDLER_CONSUMED;
1257 /* 10.6.1 if the SC is not found */
1258 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1260 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1261 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1263 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1264 struct sk_buff *nskb;
1266 secy_stats = this_cpu_ptr(macsec->stats);
1268 /* If validateFrames is Strict or the C bit in the
1269 * SecTAG is set, discard
1272 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1273 u64_stats_update_begin(&secy_stats->syncp);
1274 secy_stats->stats.InPktsNoSCI++;
1275 u64_stats_update_end(&secy_stats->syncp);
1279 /* not strict, the frame (with the SecTAG and ICV
1280 * removed) is delivered to the Controlled Port.
1282 nskb = skb_clone(skb, GFP_ATOMIC);
1286 macsec_reset_skb(nskb, macsec->secy.netdev);
1288 ret = netif_rx(nskb);
1289 if (ret == NET_RX_SUCCESS) {
1290 u64_stats_update_begin(&secy_stats->syncp);
1291 secy_stats->stats.InPktsUnknownSCI++;
1292 u64_stats_update_end(&secy_stats->syncp);
1294 macsec->secy.netdev->stats.rx_dropped++;
1300 return RX_HANDLER_PASS;
1303 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1305 struct crypto_aead *tfm;
1308 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1313 ret = crypto_aead_setkey(tfm, key, key_len);
1317 ret = crypto_aead_setauthsize(tfm, icv_len);
1323 crypto_free_aead(tfm);
1324 return ERR_PTR(ret);
1327 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1330 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1334 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1335 if (IS_ERR(rx_sa->key.tfm)) {
1336 free_percpu(rx_sa->stats);
1337 return PTR_ERR(rx_sa->key.tfm);
1340 rx_sa->active = false;
1342 atomic_set(&rx_sa->refcnt, 1);
1343 spin_lock_init(&rx_sa->lock);
1348 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1350 rx_sa->active = false;
1352 macsec_rxsa_put(rx_sa);
1355 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1359 for (i = 0; i < MACSEC_NUM_AN; i++) {
1360 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1362 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1367 macsec_rxsc_put(rx_sc);
1370 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1372 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1374 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1376 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1377 if (rx_sc->sci == sci) {
1380 rcu_assign_pointer(*rx_scp, rx_sc->next);
1388 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1390 struct macsec_rx_sc *rx_sc;
1391 struct macsec_dev *macsec;
1392 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1393 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1394 struct macsec_secy *secy;
1396 list_for_each_entry(macsec, &rxd->secys, secys) {
1397 if (find_rx_sc_rtnl(&macsec->secy, sci))
1398 return ERR_PTR(-EEXIST);
1401 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1403 return ERR_PTR(-ENOMEM);
1405 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1406 if (!rx_sc->stats) {
1408 return ERR_PTR(-ENOMEM);
1412 rx_sc->active = true;
1413 atomic_set(&rx_sc->refcnt, 1);
1415 secy = &macsec_priv(dev)->secy;
1416 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1417 rcu_assign_pointer(secy->rx_sc, rx_sc);
1425 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1428 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1432 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1433 if (IS_ERR(tx_sa->key.tfm)) {
1434 free_percpu(tx_sa->stats);
1435 return PTR_ERR(tx_sa->key.tfm);
1438 tx_sa->active = false;
1439 atomic_set(&tx_sa->refcnt, 1);
1440 spin_lock_init(&tx_sa->lock);
1445 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1447 tx_sa->active = false;
1449 macsec_txsa_put(tx_sa);
1452 static struct genl_family macsec_fam;
1454 static struct net_device *get_dev_from_nl(struct net *net,
1455 struct nlattr **attrs)
1457 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1458 struct net_device *dev;
1460 dev = __dev_get_by_index(net, ifindex);
1462 return ERR_PTR(-ENODEV);
1464 if (!netif_is_macsec(dev))
1465 return ERR_PTR(-ENODEV);
1470 static sci_t nla_get_sci(const struct nlattr *nla)
1472 return (__force sci_t)nla_get_u64(nla);
1475 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1478 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1481 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1482 struct nlattr **attrs,
1483 struct nlattr **tb_sa,
1484 struct net_device **devp,
1485 struct macsec_secy **secyp,
1486 struct macsec_tx_sc **scp,
1489 struct net_device *dev;
1490 struct macsec_secy *secy;
1491 struct macsec_tx_sc *tx_sc;
1492 struct macsec_tx_sa *tx_sa;
1494 if (!tb_sa[MACSEC_SA_ATTR_AN])
1495 return ERR_PTR(-EINVAL);
1497 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1499 dev = get_dev_from_nl(net, attrs);
1501 return ERR_CAST(dev);
1503 if (*assoc_num >= MACSEC_NUM_AN)
1504 return ERR_PTR(-EINVAL);
1506 secy = &macsec_priv(dev)->secy;
1507 tx_sc = &secy->tx_sc;
1509 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1511 return ERR_PTR(-ENODEV);
1519 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1520 struct nlattr **attrs,
1521 struct nlattr **tb_rxsc,
1522 struct net_device **devp,
1523 struct macsec_secy **secyp)
1525 struct net_device *dev;
1526 struct macsec_secy *secy;
1527 struct macsec_rx_sc *rx_sc;
1530 dev = get_dev_from_nl(net, attrs);
1532 return ERR_CAST(dev);
1534 secy = &macsec_priv(dev)->secy;
1536 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1537 return ERR_PTR(-EINVAL);
1539 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1540 rx_sc = find_rx_sc_rtnl(secy, sci);
1542 return ERR_PTR(-ENODEV);
1550 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1551 struct nlattr **attrs,
1552 struct nlattr **tb_rxsc,
1553 struct nlattr **tb_sa,
1554 struct net_device **devp,
1555 struct macsec_secy **secyp,
1556 struct macsec_rx_sc **scp,
1559 struct macsec_rx_sc *rx_sc;
1560 struct macsec_rx_sa *rx_sa;
1562 if (!tb_sa[MACSEC_SA_ATTR_AN])
1563 return ERR_PTR(-EINVAL);
1565 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1566 if (*assoc_num >= MACSEC_NUM_AN)
1567 return ERR_PTR(-EINVAL);
1569 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1571 return ERR_CAST(rx_sc);
1573 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1575 return ERR_PTR(-ENODEV);
1582 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1583 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1584 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1585 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1588 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1589 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1590 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1593 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1594 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1595 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1596 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1597 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1598 .len = MACSEC_KEYID_LEN, },
1599 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1600 .len = MACSEC_MAX_KEY_LEN, },
1603 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1605 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1608 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX,
1609 attrs[MACSEC_ATTR_SA_CONFIG],
1610 macsec_genl_sa_policy, NULL))
1616 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1618 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1621 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX,
1622 attrs[MACSEC_ATTR_RXSC_CONFIG],
1623 macsec_genl_rxsc_policy, NULL))
1629 static bool validate_add_rxsa(struct nlattr **attrs)
1631 if (!attrs[MACSEC_SA_ATTR_AN] ||
1632 !attrs[MACSEC_SA_ATTR_KEY] ||
1633 !attrs[MACSEC_SA_ATTR_KEYID])
1636 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1639 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1642 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1643 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1647 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1653 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1655 struct net_device *dev;
1656 struct nlattr **attrs = info->attrs;
1657 struct macsec_secy *secy;
1658 struct macsec_rx_sc *rx_sc;
1659 struct macsec_rx_sa *rx_sa;
1660 unsigned char assoc_num;
1661 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1662 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1665 if (!attrs[MACSEC_ATTR_IFINDEX])
1668 if (parse_sa_config(attrs, tb_sa))
1671 if (parse_rxsc_config(attrs, tb_rxsc))
1674 if (!validate_add_rxsa(tb_sa))
1678 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1679 if (IS_ERR(rx_sc)) {
1681 return PTR_ERR(rx_sc);
1684 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1686 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1687 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1688 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1693 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1699 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1705 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1706 secy->key_len, secy->icv_len);
1713 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1714 spin_lock_bh(&rx_sa->lock);
1715 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1716 spin_unlock_bh(&rx_sa->lock);
1719 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1720 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1722 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1724 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1731 static bool validate_add_rxsc(struct nlattr **attrs)
1733 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1736 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1737 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1744 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1746 struct net_device *dev;
1747 sci_t sci = MACSEC_UNDEF_SCI;
1748 struct nlattr **attrs = info->attrs;
1749 struct macsec_rx_sc *rx_sc;
1750 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1752 if (!attrs[MACSEC_ATTR_IFINDEX])
1755 if (parse_rxsc_config(attrs, tb_rxsc))
1758 if (!validate_add_rxsc(tb_rxsc))
1762 dev = get_dev_from_nl(genl_info_net(info), attrs);
1765 return PTR_ERR(dev);
1768 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1770 rx_sc = create_rx_sc(dev, sci);
1771 if (IS_ERR(rx_sc)) {
1773 return PTR_ERR(rx_sc);
1776 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1777 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1784 static bool validate_add_txsa(struct nlattr **attrs)
1786 if (!attrs[MACSEC_SA_ATTR_AN] ||
1787 !attrs[MACSEC_SA_ATTR_PN] ||
1788 !attrs[MACSEC_SA_ATTR_KEY] ||
1789 !attrs[MACSEC_SA_ATTR_KEYID])
1792 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1795 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1798 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1799 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1803 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1809 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1811 struct net_device *dev;
1812 struct nlattr **attrs = info->attrs;
1813 struct macsec_secy *secy;
1814 struct macsec_tx_sc *tx_sc;
1815 struct macsec_tx_sa *tx_sa;
1816 unsigned char assoc_num;
1817 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1820 if (!attrs[MACSEC_ATTR_IFINDEX])
1823 if (parse_sa_config(attrs, tb_sa))
1826 if (!validate_add_txsa(tb_sa))
1830 dev = get_dev_from_nl(genl_info_net(info), attrs);
1833 return PTR_ERR(dev);
1836 secy = &macsec_priv(dev)->secy;
1837 tx_sc = &secy->tx_sc;
1839 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1841 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1842 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1843 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1848 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1854 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1860 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1861 secy->key_len, secy->icv_len);
1868 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1870 spin_lock_bh(&tx_sa->lock);
1871 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1872 spin_unlock_bh(&tx_sa->lock);
1874 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1875 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1877 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1878 secy->operational = true;
1880 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1887 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1889 struct nlattr **attrs = info->attrs;
1890 struct net_device *dev;
1891 struct macsec_secy *secy;
1892 struct macsec_rx_sc *rx_sc;
1893 struct macsec_rx_sa *rx_sa;
1895 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1896 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1898 if (!attrs[MACSEC_ATTR_IFINDEX])
1901 if (parse_sa_config(attrs, tb_sa))
1904 if (parse_rxsc_config(attrs, tb_rxsc))
1908 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1909 &dev, &secy, &rx_sc, &assoc_num);
1910 if (IS_ERR(rx_sa)) {
1912 return PTR_ERR(rx_sa);
1915 if (rx_sa->active) {
1920 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1928 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1930 struct nlattr **attrs = info->attrs;
1931 struct net_device *dev;
1932 struct macsec_secy *secy;
1933 struct macsec_rx_sc *rx_sc;
1935 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1937 if (!attrs[MACSEC_ATTR_IFINDEX])
1940 if (parse_rxsc_config(attrs, tb_rxsc))
1943 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1947 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1950 return PTR_ERR(dev);
1953 secy = &macsec_priv(dev)->secy;
1954 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1956 rx_sc = del_rx_sc(secy, sci);
1968 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1970 struct nlattr **attrs = info->attrs;
1971 struct net_device *dev;
1972 struct macsec_secy *secy;
1973 struct macsec_tx_sc *tx_sc;
1974 struct macsec_tx_sa *tx_sa;
1976 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1978 if (!attrs[MACSEC_ATTR_IFINDEX])
1981 if (parse_sa_config(attrs, tb_sa))
1985 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1986 &dev, &secy, &tx_sc, &assoc_num);
1987 if (IS_ERR(tx_sa)) {
1989 return PTR_ERR(tx_sa);
1992 if (tx_sa->active) {
1997 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2005 static bool validate_upd_sa(struct nlattr **attrs)
2007 if (!attrs[MACSEC_SA_ATTR_AN] ||
2008 attrs[MACSEC_SA_ATTR_KEY] ||
2009 attrs[MACSEC_SA_ATTR_KEYID])
2012 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2015 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2018 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2019 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2026 static int macsec_upd_txsa(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_tx_sc *tx_sc;
2032 struct macsec_tx_sa *tx_sa;
2034 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2036 if (!attrs[MACSEC_ATTR_IFINDEX])
2039 if (parse_sa_config(attrs, tb_sa))
2042 if (!validate_upd_sa(tb_sa))
2046 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2047 &dev, &secy, &tx_sc, &assoc_num);
2048 if (IS_ERR(tx_sa)) {
2050 return PTR_ERR(tx_sa);
2053 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2054 spin_lock_bh(&tx_sa->lock);
2055 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2056 spin_unlock_bh(&tx_sa->lock);
2059 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2060 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2062 if (assoc_num == tx_sc->encoding_sa)
2063 secy->operational = tx_sa->active;
2070 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2072 struct nlattr **attrs = info->attrs;
2073 struct net_device *dev;
2074 struct macsec_secy *secy;
2075 struct macsec_rx_sc *rx_sc;
2076 struct macsec_rx_sa *rx_sa;
2078 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2079 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2081 if (!attrs[MACSEC_ATTR_IFINDEX])
2084 if (parse_rxsc_config(attrs, tb_rxsc))
2087 if (parse_sa_config(attrs, tb_sa))
2090 if (!validate_upd_sa(tb_sa))
2094 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2095 &dev, &secy, &rx_sc, &assoc_num);
2096 if (IS_ERR(rx_sa)) {
2098 return PTR_ERR(rx_sa);
2101 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2102 spin_lock_bh(&rx_sa->lock);
2103 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2104 spin_unlock_bh(&rx_sa->lock);
2107 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2108 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2114 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2116 struct nlattr **attrs = info->attrs;
2117 struct net_device *dev;
2118 struct macsec_secy *secy;
2119 struct macsec_rx_sc *rx_sc;
2120 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2122 if (!attrs[MACSEC_ATTR_IFINDEX])
2125 if (parse_rxsc_config(attrs, tb_rxsc))
2128 if (!validate_add_rxsc(tb_rxsc))
2132 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2133 if (IS_ERR(rx_sc)) {
2135 return PTR_ERR(rx_sc);
2138 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2139 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2141 if (rx_sc->active != new)
2142 secy->n_rx_sc += new ? 1 : -1;
2144 rx_sc->active = new;
2152 static int copy_tx_sa_stats(struct sk_buff *skb,
2153 struct macsec_tx_sa_stats __percpu *pstats)
2155 struct macsec_tx_sa_stats sum = {0, };
2158 for_each_possible_cpu(cpu) {
2159 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2161 sum.OutPktsProtected += stats->OutPktsProtected;
2162 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2165 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2166 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2172 static int copy_rx_sa_stats(struct sk_buff *skb,
2173 struct macsec_rx_sa_stats __percpu *pstats)
2175 struct macsec_rx_sa_stats sum = {0, };
2178 for_each_possible_cpu(cpu) {
2179 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2181 sum.InPktsOK += stats->InPktsOK;
2182 sum.InPktsInvalid += stats->InPktsInvalid;
2183 sum.InPktsNotValid += stats->InPktsNotValid;
2184 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2185 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2188 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2189 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2190 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2191 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2192 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2198 static int copy_rx_sc_stats(struct sk_buff *skb,
2199 struct pcpu_rx_sc_stats __percpu *pstats)
2201 struct macsec_rx_sc_stats sum = {0, };
2204 for_each_possible_cpu(cpu) {
2205 const struct pcpu_rx_sc_stats *stats;
2206 struct macsec_rx_sc_stats tmp;
2209 stats = per_cpu_ptr(pstats, cpu);
2211 start = u64_stats_fetch_begin_irq(&stats->syncp);
2212 memcpy(&tmp, &stats->stats, sizeof(tmp));
2213 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2215 sum.InOctetsValidated += tmp.InOctetsValidated;
2216 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2217 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2218 sum.InPktsDelayed += tmp.InPktsDelayed;
2219 sum.InPktsOK += tmp.InPktsOK;
2220 sum.InPktsInvalid += tmp.InPktsInvalid;
2221 sum.InPktsLate += tmp.InPktsLate;
2222 sum.InPktsNotValid += tmp.InPktsNotValid;
2223 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2224 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2227 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2228 sum.InOctetsValidated,
2229 MACSEC_RXSC_STATS_ATTR_PAD) ||
2230 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2231 sum.InOctetsDecrypted,
2232 MACSEC_RXSC_STATS_ATTR_PAD) ||
2233 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2234 sum.InPktsUnchecked,
2235 MACSEC_RXSC_STATS_ATTR_PAD) ||
2236 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2238 MACSEC_RXSC_STATS_ATTR_PAD) ||
2239 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2241 MACSEC_RXSC_STATS_ATTR_PAD) ||
2242 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2244 MACSEC_RXSC_STATS_ATTR_PAD) ||
2245 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2247 MACSEC_RXSC_STATS_ATTR_PAD) ||
2248 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2250 MACSEC_RXSC_STATS_ATTR_PAD) ||
2251 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2252 sum.InPktsNotUsingSA,
2253 MACSEC_RXSC_STATS_ATTR_PAD) ||
2254 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2256 MACSEC_RXSC_STATS_ATTR_PAD))
2262 static int copy_tx_sc_stats(struct sk_buff *skb,
2263 struct pcpu_tx_sc_stats __percpu *pstats)
2265 struct macsec_tx_sc_stats sum = {0, };
2268 for_each_possible_cpu(cpu) {
2269 const struct pcpu_tx_sc_stats *stats;
2270 struct macsec_tx_sc_stats tmp;
2273 stats = per_cpu_ptr(pstats, cpu);
2275 start = u64_stats_fetch_begin_irq(&stats->syncp);
2276 memcpy(&tmp, &stats->stats, sizeof(tmp));
2277 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2279 sum.OutPktsProtected += tmp.OutPktsProtected;
2280 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2281 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2282 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2285 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2286 sum.OutPktsProtected,
2287 MACSEC_TXSC_STATS_ATTR_PAD) ||
2288 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2289 sum.OutPktsEncrypted,
2290 MACSEC_TXSC_STATS_ATTR_PAD) ||
2291 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2292 sum.OutOctetsProtected,
2293 MACSEC_TXSC_STATS_ATTR_PAD) ||
2294 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2295 sum.OutOctetsEncrypted,
2296 MACSEC_TXSC_STATS_ATTR_PAD))
2302 static int copy_secy_stats(struct sk_buff *skb,
2303 struct pcpu_secy_stats __percpu *pstats)
2305 struct macsec_dev_stats sum = {0, };
2308 for_each_possible_cpu(cpu) {
2309 const struct pcpu_secy_stats *stats;
2310 struct macsec_dev_stats tmp;
2313 stats = per_cpu_ptr(pstats, cpu);
2315 start = u64_stats_fetch_begin_irq(&stats->syncp);
2316 memcpy(&tmp, &stats->stats, sizeof(tmp));
2317 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2319 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2320 sum.InPktsUntagged += tmp.InPktsUntagged;
2321 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2322 sum.InPktsNoTag += tmp.InPktsNoTag;
2323 sum.InPktsBadTag += tmp.InPktsBadTag;
2324 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2325 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2326 sum.InPktsOverrun += tmp.InPktsOverrun;
2329 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2330 sum.OutPktsUntagged,
2331 MACSEC_SECY_STATS_ATTR_PAD) ||
2332 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2334 MACSEC_SECY_STATS_ATTR_PAD) ||
2335 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2337 MACSEC_SECY_STATS_ATTR_PAD) ||
2338 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2340 MACSEC_SECY_STATS_ATTR_PAD) ||
2341 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2343 MACSEC_SECY_STATS_ATTR_PAD) ||
2344 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2345 sum.InPktsUnknownSCI,
2346 MACSEC_SECY_STATS_ATTR_PAD) ||
2347 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2349 MACSEC_SECY_STATS_ATTR_PAD) ||
2350 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2352 MACSEC_SECY_STATS_ATTR_PAD))
2358 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2360 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2361 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2366 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2367 MACSEC_SECY_ATTR_PAD) ||
2368 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2369 MACSEC_DEFAULT_CIPHER_ID,
2370 MACSEC_SECY_ATTR_PAD) ||
2371 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2372 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2373 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2374 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2375 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2376 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2377 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2378 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2379 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2380 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2383 if (secy->replay_protect) {
2384 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2388 nla_nest_end(skb, secy_nest);
2392 nla_nest_cancel(skb, secy_nest);
2396 static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2397 struct sk_buff *skb, struct netlink_callback *cb)
2399 struct macsec_rx_sc *rx_sc;
2400 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2401 struct nlattr *txsa_list, *rxsc_list;
2404 struct nlattr *attr;
2406 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2407 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2411 genl_dump_check_consistent(cb, hdr, &macsec_fam);
2413 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2414 goto nla_put_failure;
2416 if (nla_put_secy(secy, skb))
2417 goto nla_put_failure;
2419 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2421 goto nla_put_failure;
2422 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2423 nla_nest_cancel(skb, attr);
2424 goto nla_put_failure;
2426 nla_nest_end(skb, attr);
2428 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2430 goto nla_put_failure;
2431 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2432 nla_nest_cancel(skb, attr);
2433 goto nla_put_failure;
2435 nla_nest_end(skb, attr);
2437 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2439 goto nla_put_failure;
2440 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2441 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2442 struct nlattr *txsa_nest;
2447 txsa_nest = nla_nest_start(skb, j++);
2449 nla_nest_cancel(skb, txsa_list);
2450 goto nla_put_failure;
2453 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2454 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2455 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2456 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2457 nla_nest_cancel(skb, txsa_nest);
2458 nla_nest_cancel(skb, txsa_list);
2459 goto nla_put_failure;
2462 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2464 nla_nest_cancel(skb, txsa_nest);
2465 nla_nest_cancel(skb, txsa_list);
2466 goto nla_put_failure;
2468 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2469 nla_nest_cancel(skb, attr);
2470 nla_nest_cancel(skb, txsa_nest);
2471 nla_nest_cancel(skb, txsa_list);
2472 goto nla_put_failure;
2474 nla_nest_end(skb, attr);
2476 nla_nest_end(skb, txsa_nest);
2478 nla_nest_end(skb, txsa_list);
2480 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2482 goto nla_put_failure;
2485 for_each_rxsc_rtnl(secy, rx_sc) {
2487 struct nlattr *rxsa_list;
2488 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2491 nla_nest_cancel(skb, rxsc_list);
2492 goto nla_put_failure;
2495 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2496 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2497 MACSEC_RXSC_ATTR_PAD)) {
2498 nla_nest_cancel(skb, rxsc_nest);
2499 nla_nest_cancel(skb, rxsc_list);
2500 goto nla_put_failure;
2503 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2505 nla_nest_cancel(skb, rxsc_nest);
2506 nla_nest_cancel(skb, rxsc_list);
2507 goto nla_put_failure;
2509 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2510 nla_nest_cancel(skb, attr);
2511 nla_nest_cancel(skb, rxsc_nest);
2512 nla_nest_cancel(skb, rxsc_list);
2513 goto nla_put_failure;
2515 nla_nest_end(skb, attr);
2517 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2519 nla_nest_cancel(skb, rxsc_nest);
2520 nla_nest_cancel(skb, rxsc_list);
2521 goto nla_put_failure;
2524 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2525 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2526 struct nlattr *rxsa_nest;
2531 rxsa_nest = nla_nest_start(skb, k++);
2533 nla_nest_cancel(skb, rxsa_list);
2534 nla_nest_cancel(skb, rxsc_nest);
2535 nla_nest_cancel(skb, rxsc_list);
2536 goto nla_put_failure;
2539 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2541 nla_nest_cancel(skb, rxsa_list);
2542 nla_nest_cancel(skb, rxsc_nest);
2543 nla_nest_cancel(skb, rxsc_list);
2544 goto nla_put_failure;
2546 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2547 nla_nest_cancel(skb, attr);
2548 nla_nest_cancel(skb, rxsa_list);
2549 nla_nest_cancel(skb, rxsc_nest);
2550 nla_nest_cancel(skb, rxsc_list);
2551 goto nla_put_failure;
2553 nla_nest_end(skb, attr);
2555 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2556 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2557 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2558 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2559 nla_nest_cancel(skb, rxsa_nest);
2560 nla_nest_cancel(skb, rxsc_nest);
2561 nla_nest_cancel(skb, rxsc_list);
2562 goto nla_put_failure;
2564 nla_nest_end(skb, rxsa_nest);
2567 nla_nest_end(skb, rxsa_list);
2568 nla_nest_end(skb, rxsc_nest);
2571 nla_nest_end(skb, rxsc_list);
2573 genlmsg_end(skb, hdr);
2578 genlmsg_cancel(skb, hdr);
2582 static int macsec_generation = 1; /* protected by RTNL */
2584 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2586 struct net *net = sock_net(skb->sk);
2587 struct net_device *dev;
2590 dev_idx = cb->args[0];
2595 cb->seq = macsec_generation;
2597 for_each_netdev(net, dev) {
2598 struct macsec_secy *secy;
2603 if (!netif_is_macsec(dev))
2606 secy = &macsec_priv(dev)->secy;
2607 if (dump_secy(secy, dev, skb, cb) < 0)
2619 static const struct genl_ops macsec_genl_ops[] = {
2621 .cmd = MACSEC_CMD_GET_TXSC,
2622 .dumpit = macsec_dump_txsc,
2623 .policy = macsec_genl_policy,
2626 .cmd = MACSEC_CMD_ADD_RXSC,
2627 .doit = macsec_add_rxsc,
2628 .policy = macsec_genl_policy,
2629 .flags = GENL_ADMIN_PERM,
2632 .cmd = MACSEC_CMD_DEL_RXSC,
2633 .doit = macsec_del_rxsc,
2634 .policy = macsec_genl_policy,
2635 .flags = GENL_ADMIN_PERM,
2638 .cmd = MACSEC_CMD_UPD_RXSC,
2639 .doit = macsec_upd_rxsc,
2640 .policy = macsec_genl_policy,
2641 .flags = GENL_ADMIN_PERM,
2644 .cmd = MACSEC_CMD_ADD_TXSA,
2645 .doit = macsec_add_txsa,
2646 .policy = macsec_genl_policy,
2647 .flags = GENL_ADMIN_PERM,
2650 .cmd = MACSEC_CMD_DEL_TXSA,
2651 .doit = macsec_del_txsa,
2652 .policy = macsec_genl_policy,
2653 .flags = GENL_ADMIN_PERM,
2656 .cmd = MACSEC_CMD_UPD_TXSA,
2657 .doit = macsec_upd_txsa,
2658 .policy = macsec_genl_policy,
2659 .flags = GENL_ADMIN_PERM,
2662 .cmd = MACSEC_CMD_ADD_RXSA,
2663 .doit = macsec_add_rxsa,
2664 .policy = macsec_genl_policy,
2665 .flags = GENL_ADMIN_PERM,
2668 .cmd = MACSEC_CMD_DEL_RXSA,
2669 .doit = macsec_del_rxsa,
2670 .policy = macsec_genl_policy,
2671 .flags = GENL_ADMIN_PERM,
2674 .cmd = MACSEC_CMD_UPD_RXSA,
2675 .doit = macsec_upd_rxsa,
2676 .policy = macsec_genl_policy,
2677 .flags = GENL_ADMIN_PERM,
2681 static struct genl_family macsec_fam __ro_after_init = {
2682 .name = MACSEC_GENL_NAME,
2684 .version = MACSEC_GENL_VERSION,
2685 .maxattr = MACSEC_ATTR_MAX,
2687 .module = THIS_MODULE,
2688 .ops = macsec_genl_ops,
2689 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2692 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2693 struct net_device *dev)
2695 struct macsec_dev *macsec = netdev_priv(dev);
2696 struct macsec_secy *secy = &macsec->secy;
2697 struct pcpu_secy_stats *secy_stats;
2701 if (!secy->protect_frames) {
2702 secy_stats = this_cpu_ptr(macsec->stats);
2703 u64_stats_update_begin(&secy_stats->syncp);
2704 secy_stats->stats.OutPktsUntagged++;
2705 u64_stats_update_end(&secy_stats->syncp);
2706 skb->dev = macsec->real_dev;
2708 ret = dev_queue_xmit(skb);
2709 count_tx(dev, ret, len);
2713 if (!secy->operational) {
2715 dev->stats.tx_dropped++;
2716 return NETDEV_TX_OK;
2719 skb = macsec_encrypt(skb, dev);
2721 if (PTR_ERR(skb) != -EINPROGRESS)
2722 dev->stats.tx_dropped++;
2723 return NETDEV_TX_OK;
2726 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2728 macsec_encrypt_finish(skb, dev);
2730 ret = dev_queue_xmit(skb);
2731 count_tx(dev, ret, len);
2735 #define MACSEC_FEATURES \
2736 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2737 static struct lock_class_key macsec_netdev_addr_lock_key;
2739 static int macsec_dev_init(struct net_device *dev)
2741 struct macsec_dev *macsec = macsec_priv(dev);
2742 struct net_device *real_dev = macsec->real_dev;
2745 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2749 err = gro_cells_init(&macsec->gro_cells, dev);
2751 free_percpu(dev->tstats);
2755 dev->features = real_dev->features & MACSEC_FEATURES;
2756 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2758 dev->needed_headroom = real_dev->needed_headroom +
2759 MACSEC_NEEDED_HEADROOM;
2760 dev->needed_tailroom = real_dev->needed_tailroom +
2761 MACSEC_NEEDED_TAILROOM;
2763 if (is_zero_ether_addr(dev->dev_addr))
2764 eth_hw_addr_inherit(dev, real_dev);
2765 if (is_zero_ether_addr(dev->broadcast))
2766 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2771 static void macsec_dev_uninit(struct net_device *dev)
2773 struct macsec_dev *macsec = macsec_priv(dev);
2775 gro_cells_destroy(&macsec->gro_cells);
2776 free_percpu(dev->tstats);
2779 static netdev_features_t macsec_fix_features(struct net_device *dev,
2780 netdev_features_t features)
2782 struct macsec_dev *macsec = macsec_priv(dev);
2783 struct net_device *real_dev = macsec->real_dev;
2785 features &= (real_dev->features & MACSEC_FEATURES) |
2786 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2787 features |= NETIF_F_LLTX;
2792 static int macsec_dev_open(struct net_device *dev)
2794 struct macsec_dev *macsec = macsec_priv(dev);
2795 struct net_device *real_dev = macsec->real_dev;
2798 if (!(real_dev->flags & IFF_UP))
2801 err = dev_uc_add(real_dev, dev->dev_addr);
2805 if (dev->flags & IFF_ALLMULTI) {
2806 err = dev_set_allmulti(real_dev, 1);
2811 if (dev->flags & IFF_PROMISC) {
2812 err = dev_set_promiscuity(real_dev, 1);
2814 goto clear_allmulti;
2817 if (netif_carrier_ok(real_dev))
2818 netif_carrier_on(dev);
2822 if (dev->flags & IFF_ALLMULTI)
2823 dev_set_allmulti(real_dev, -1);
2825 dev_uc_del(real_dev, dev->dev_addr);
2826 netif_carrier_off(dev);
2830 static int macsec_dev_stop(struct net_device *dev)
2832 struct macsec_dev *macsec = macsec_priv(dev);
2833 struct net_device *real_dev = macsec->real_dev;
2835 netif_carrier_off(dev);
2837 dev_mc_unsync(real_dev, dev);
2838 dev_uc_unsync(real_dev, dev);
2840 if (dev->flags & IFF_ALLMULTI)
2841 dev_set_allmulti(real_dev, -1);
2843 if (dev->flags & IFF_PROMISC)
2844 dev_set_promiscuity(real_dev, -1);
2846 dev_uc_del(real_dev, dev->dev_addr);
2851 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2853 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2855 if (!(dev->flags & IFF_UP))
2858 if (change & IFF_ALLMULTI)
2859 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2861 if (change & IFF_PROMISC)
2862 dev_set_promiscuity(real_dev,
2863 dev->flags & IFF_PROMISC ? 1 : -1);
2866 static void macsec_dev_set_rx_mode(struct net_device *dev)
2868 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2870 dev_mc_sync(real_dev, dev);
2871 dev_uc_sync(real_dev, dev);
2874 static int macsec_set_mac_address(struct net_device *dev, void *p)
2876 struct macsec_dev *macsec = macsec_priv(dev);
2877 struct net_device *real_dev = macsec->real_dev;
2878 struct sockaddr *addr = p;
2881 if (!is_valid_ether_addr(addr->sa_data))
2882 return -EADDRNOTAVAIL;
2884 if (!(dev->flags & IFF_UP))
2887 err = dev_uc_add(real_dev, addr->sa_data);
2891 dev_uc_del(real_dev, dev->dev_addr);
2894 ether_addr_copy(dev->dev_addr, addr->sa_data);
2898 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2900 struct macsec_dev *macsec = macsec_priv(dev);
2901 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2903 if (macsec->real_dev->mtu - extra < new_mtu)
2911 static void macsec_get_stats64(struct net_device *dev,
2912 struct rtnl_link_stats64 *s)
2919 for_each_possible_cpu(cpu) {
2920 struct pcpu_sw_netstats *stats;
2921 struct pcpu_sw_netstats tmp;
2924 stats = per_cpu_ptr(dev->tstats, cpu);
2926 start = u64_stats_fetch_begin_irq(&stats->syncp);
2927 tmp.rx_packets = stats->rx_packets;
2928 tmp.rx_bytes = stats->rx_bytes;
2929 tmp.tx_packets = stats->tx_packets;
2930 tmp.tx_bytes = stats->tx_bytes;
2931 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2933 s->rx_packets += tmp.rx_packets;
2934 s->rx_bytes += tmp.rx_bytes;
2935 s->tx_packets += tmp.tx_packets;
2936 s->tx_bytes += tmp.tx_bytes;
2939 s->rx_dropped = dev->stats.rx_dropped;
2940 s->tx_dropped = dev->stats.tx_dropped;
2943 static int macsec_get_iflink(const struct net_device *dev)
2945 return macsec_priv(dev)->real_dev->ifindex;
2949 static int macsec_get_nest_level(struct net_device *dev)
2951 return macsec_priv(dev)->nest_level;
2955 static const struct net_device_ops macsec_netdev_ops = {
2956 .ndo_init = macsec_dev_init,
2957 .ndo_uninit = macsec_dev_uninit,
2958 .ndo_open = macsec_dev_open,
2959 .ndo_stop = macsec_dev_stop,
2960 .ndo_fix_features = macsec_fix_features,
2961 .ndo_change_mtu = macsec_change_mtu,
2962 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2963 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2964 .ndo_set_mac_address = macsec_set_mac_address,
2965 .ndo_start_xmit = macsec_start_xmit,
2966 .ndo_get_stats64 = macsec_get_stats64,
2967 .ndo_get_iflink = macsec_get_iflink,
2968 .ndo_get_lock_subclass = macsec_get_nest_level,
2971 static const struct device_type macsec_type = {
2975 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2976 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2977 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2978 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2979 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2980 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2981 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2982 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2983 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2984 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2985 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2986 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2987 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2990 static void macsec_free_netdev(struct net_device *dev)
2992 struct macsec_dev *macsec = macsec_priv(dev);
2993 struct net_device *real_dev = macsec->real_dev;
2995 free_percpu(macsec->stats);
2996 free_percpu(macsec->secy.tx_sc.stats);
3001 static void macsec_setup(struct net_device *dev)
3005 dev->max_mtu = ETH_MAX_MTU;
3006 dev->priv_flags |= IFF_NO_QUEUE;
3007 dev->netdev_ops = &macsec_netdev_ops;
3008 dev->needs_free_netdev = true;
3009 dev->priv_destructor = macsec_free_netdev;
3010 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3012 eth_zero_addr(dev->broadcast);
3015 static void macsec_changelink_common(struct net_device *dev,
3016 struct nlattr *data[])
3018 struct macsec_secy *secy;
3019 struct macsec_tx_sc *tx_sc;
3021 secy = &macsec_priv(dev)->secy;
3022 tx_sc = &secy->tx_sc;
3024 if (data[IFLA_MACSEC_ENCODING_SA]) {
3025 struct macsec_tx_sa *tx_sa;
3027 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3028 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3030 secy->operational = tx_sa && tx_sa->active;
3033 if (data[IFLA_MACSEC_WINDOW])
3034 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3036 if (data[IFLA_MACSEC_ENCRYPT])
3037 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3039 if (data[IFLA_MACSEC_PROTECT])
3040 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3042 if (data[IFLA_MACSEC_INC_SCI])
3043 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3045 if (data[IFLA_MACSEC_ES])
3046 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3048 if (data[IFLA_MACSEC_SCB])
3049 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3051 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3052 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3054 if (data[IFLA_MACSEC_VALIDATION])
3055 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3058 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3059 struct nlattr *data[])
3064 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3065 data[IFLA_MACSEC_ICV_LEN] ||
3066 data[IFLA_MACSEC_SCI] ||
3067 data[IFLA_MACSEC_PORT])
3070 macsec_changelink_common(dev, data);
3075 static void macsec_del_dev(struct macsec_dev *macsec)
3079 while (macsec->secy.rx_sc) {
3080 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3082 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3086 for (i = 0; i < MACSEC_NUM_AN; i++) {
3087 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3090 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3096 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3098 struct macsec_dev *macsec = macsec_priv(dev);
3099 struct net_device *real_dev = macsec->real_dev;
3101 unregister_netdevice_queue(dev, head);
3102 list_del_rcu(&macsec->secys);
3103 macsec_del_dev(macsec);
3104 netdev_upper_dev_unlink(real_dev, dev);
3106 macsec_generation++;
3109 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3111 struct macsec_dev *macsec = macsec_priv(dev);
3112 struct net_device *real_dev = macsec->real_dev;
3113 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3115 macsec_common_dellink(dev, head);
3117 if (list_empty(&rxd->secys)) {
3118 netdev_rx_handler_unregister(real_dev);
3123 static int register_macsec_dev(struct net_device *real_dev,
3124 struct net_device *dev)
3126 struct macsec_dev *macsec = macsec_priv(dev);
3127 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3132 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3136 INIT_LIST_HEAD(&rxd->secys);
3138 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3146 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3150 static bool sci_exists(struct net_device *dev, sci_t sci)
3152 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3153 struct macsec_dev *macsec;
3155 list_for_each_entry(macsec, &rxd->secys, secys) {
3156 if (macsec->secy.sci == sci)
3163 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3165 return make_sci(dev->dev_addr, port);
3168 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3170 struct macsec_dev *macsec = macsec_priv(dev);
3171 struct macsec_secy *secy = &macsec->secy;
3173 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3177 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3178 if (!secy->tx_sc.stats) {
3179 free_percpu(macsec->stats);
3183 if (sci == MACSEC_UNDEF_SCI)
3184 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3187 secy->operational = true;
3188 secy->key_len = DEFAULT_SAK_LEN;
3189 secy->icv_len = icv_len;
3190 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3191 secy->protect_frames = true;
3192 secy->replay_protect = false;
3195 secy->tx_sc.active = true;
3196 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3197 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3198 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3199 secy->tx_sc.end_station = false;
3200 secy->tx_sc.scb = false;
3205 static int macsec_newlink(struct net *net, struct net_device *dev,
3206 struct nlattr *tb[], struct nlattr *data[])
3208 struct macsec_dev *macsec = macsec_priv(dev);
3209 struct net_device *real_dev;
3212 u8 icv_len = DEFAULT_ICV_LEN;
3213 rx_handler_func_t *rx_handler;
3217 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3221 dev->priv_flags |= IFF_MACSEC;
3223 macsec->real_dev = real_dev;
3225 if (data && data[IFLA_MACSEC_ICV_LEN])
3226 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3227 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3229 rx_handler = rtnl_dereference(real_dev->rx_handler);
3230 if (rx_handler && rx_handler != macsec_handle_frame)
3233 err = register_netdevice(dev);
3239 macsec->nest_level = dev_get_nest_level(real_dev) + 1;
3240 netdev_lockdep_set_classes(dev);
3241 lockdep_set_class_and_subclass(&dev->addr_list_lock,
3242 &macsec_netdev_addr_lock_key,
3243 macsec_get_nest_level(dev));
3245 err = netdev_upper_dev_link(real_dev, dev);
3249 /* need to be already registered so that ->init has run and
3250 * the MAC addr is set
3252 if (data && data[IFLA_MACSEC_SCI])
3253 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3254 else if (data && data[IFLA_MACSEC_PORT])
3255 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3257 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3259 if (rx_handler && sci_exists(real_dev, sci)) {
3264 err = macsec_add_dev(dev, sci, icv_len);
3269 macsec_changelink_common(dev, data);
3271 err = register_macsec_dev(real_dev, dev);
3275 macsec_generation++;
3280 macsec_del_dev(macsec);
3282 netdev_upper_dev_unlink(real_dev, dev);
3284 unregister_netdevice(dev);
3288 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[])
3290 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3291 u8 icv_len = DEFAULT_ICV_LEN;
3298 if (data[IFLA_MACSEC_CIPHER_SUITE])
3299 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3301 if (data[IFLA_MACSEC_ICV_LEN]) {
3302 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3303 if (icv_len != DEFAULT_ICV_LEN) {
3304 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3305 struct crypto_aead *dummy_tfm;
3307 dummy_tfm = macsec_alloc_tfm(dummy_key,
3310 if (IS_ERR(dummy_tfm))
3311 return PTR_ERR(dummy_tfm);
3312 crypto_free_aead(dummy_tfm);
3317 case MACSEC_DEFAULT_CIPHER_ID:
3318 case MACSEC_DEFAULT_CIPHER_ALT:
3319 if (icv_len < MACSEC_MIN_ICV_LEN ||
3320 icv_len > MACSEC_STD_ICV_LEN)
3327 if (data[IFLA_MACSEC_ENCODING_SA]) {
3328 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3332 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3333 flag < IFLA_MACSEC_VALIDATION;
3336 if (nla_get_u8(data[flag]) > 1)
3341 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3342 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3343 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3345 if ((sci && (scb || es)) || (scb && es))
3348 if (data[IFLA_MACSEC_VALIDATION] &&
3349 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3352 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3353 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3354 !data[IFLA_MACSEC_WINDOW])
3360 static struct net *macsec_get_link_net(const struct net_device *dev)
3362 return dev_net(macsec_priv(dev)->real_dev);
3365 static size_t macsec_get_size(const struct net_device *dev)
3367 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3368 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3369 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3370 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3371 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3372 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3373 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3374 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3375 nla_total_size(1) + /* IFLA_MACSEC_ES */
3376 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3377 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3378 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
3382 static int macsec_fill_info(struct sk_buff *skb,
3383 const struct net_device *dev)
3385 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3386 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3388 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3390 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3391 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3392 MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) ||
3393 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3394 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3395 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3396 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3397 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3398 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3399 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3400 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3402 goto nla_put_failure;
3404 if (secy->replay_protect) {
3405 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3406 goto nla_put_failure;
3415 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3417 .priv_size = sizeof(struct macsec_dev),
3418 .maxtype = IFLA_MACSEC_MAX,
3419 .policy = macsec_rtnl_policy,
3420 .setup = macsec_setup,
3421 .validate = macsec_validate_attr,
3422 .newlink = macsec_newlink,
3423 .changelink = macsec_changelink,
3424 .dellink = macsec_dellink,
3425 .get_size = macsec_get_size,
3426 .fill_info = macsec_fill_info,
3427 .get_link_net = macsec_get_link_net,
3430 static bool is_macsec_master(struct net_device *dev)
3432 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3435 static int macsec_notify(struct notifier_block *this, unsigned long event,
3438 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3441 if (!is_macsec_master(real_dev))
3445 case NETDEV_UNREGISTER: {
3446 struct macsec_dev *m, *n;
3447 struct macsec_rxh_data *rxd;
3449 rxd = macsec_data_rtnl(real_dev);
3450 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3451 macsec_common_dellink(m->secy.netdev, &head);
3454 netdev_rx_handler_unregister(real_dev);
3457 unregister_netdevice_many(&head);
3460 case NETDEV_CHANGEMTU: {
3461 struct macsec_dev *m;
3462 struct macsec_rxh_data *rxd;
3464 rxd = macsec_data_rtnl(real_dev);
3465 list_for_each_entry(m, &rxd->secys, secys) {
3466 struct net_device *dev = m->secy.netdev;
3467 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3468 macsec_extra_len(true));
3471 dev_set_mtu(dev, mtu);
3479 static struct notifier_block macsec_notifier = {
3480 .notifier_call = macsec_notify,
3483 static int __init macsec_init(void)
3487 pr_info("MACsec IEEE 802.1AE\n");
3488 err = register_netdevice_notifier(&macsec_notifier);
3492 err = rtnl_link_register(&macsec_link_ops);
3496 err = genl_register_family(&macsec_fam);
3503 rtnl_link_unregister(&macsec_link_ops);
3505 unregister_netdevice_notifier(&macsec_notifier);
3509 static void __exit macsec_exit(void)
3511 genl_unregister_family(&macsec_fam);
3512 rtnl_link_unregister(&macsec_link_ops);
3513 unregister_netdevice_notifier(&macsec_notifier);
3517 module_init(macsec_init);
3518 module_exit(macsec_exit);
3520 MODULE_ALIAS_RTNL_LINK("macsec");
3522 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3523 MODULE_LICENSE("GPL v2");