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 <linux/refcount.h>
20 #include <net/genetlink.h>
22 #include <net/gro_cells.h>
24 #include <uapi/linux/if_macsec.h>
26 typedef u64 __bitwise sci_t;
28 #define MACSEC_SCI_LEN 8
30 /* SecTAG length = macsec_eth_header without the optional SCI */
31 #define MACSEC_TAG_LEN 6
33 struct macsec_eth_header {
37 #if defined(__LITTLE_ENDIAN_BITFIELD)
40 #elif defined(__BIG_ENDIAN_BITFIELD)
44 #error "Please fix <asm/byteorder.h>"
47 u8 secure_channel_id[8]; /* optional */
50 #define MACSEC_TCI_VERSION 0x80
51 #define MACSEC_TCI_ES 0x40 /* end station */
52 #define MACSEC_TCI_SC 0x20 /* SCI present */
53 #define MACSEC_TCI_SCB 0x10 /* epon */
54 #define MACSEC_TCI_E 0x08 /* encryption */
55 #define MACSEC_TCI_C 0x04 /* changed text */
56 #define MACSEC_AN_MASK 0x03 /* association number */
57 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
59 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
60 #define MIN_NON_SHORT_LEN 48
62 #define GCM_AES_IV_LEN 12
63 #define DEFAULT_ICV_LEN 16
65 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
67 #define for_each_rxsc(secy, sc) \
68 for (sc = rcu_dereference_bh(secy->rx_sc); \
70 sc = rcu_dereference_bh(sc->next))
71 #define for_each_rxsc_rtnl(secy, sc) \
72 for (sc = rtnl_dereference(secy->rx_sc); \
74 sc = rtnl_dereference(sc->next))
78 u8 secure_channel_id[8];
85 * struct macsec_key - SA key
86 * @id: user-provided key identifier
87 * @tfm: crypto struct, key storage
90 u8 id[MACSEC_KEYID_LEN];
91 struct crypto_aead *tfm;
94 struct macsec_rx_sc_stats {
95 __u64 InOctetsValidated;
96 __u64 InOctetsDecrypted;
97 __u64 InPktsUnchecked;
102 __u64 InPktsNotValid;
103 __u64 InPktsNotUsingSA;
104 __u64 InPktsUnusedSA;
107 struct macsec_rx_sa_stats {
110 __u32 InPktsNotValid;
111 __u32 InPktsNotUsingSA;
112 __u32 InPktsUnusedSA;
115 struct macsec_tx_sa_stats {
116 __u32 OutPktsProtected;
117 __u32 OutPktsEncrypted;
120 struct macsec_tx_sc_stats {
121 __u64 OutPktsProtected;
122 __u64 OutPktsEncrypted;
123 __u64 OutOctetsProtected;
124 __u64 OutOctetsEncrypted;
127 struct macsec_dev_stats {
128 __u64 OutPktsUntagged;
129 __u64 InPktsUntagged;
130 __u64 OutPktsTooLong;
133 __u64 InPktsUnknownSCI;
139 * struct macsec_rx_sa - receive secure association
141 * @next_pn: packet number expected for the next packet
142 * @lock: protects next_pn manipulations
143 * @key: key structure
144 * @stats: per-SA stats
146 struct macsec_rx_sa {
147 struct macsec_key key;
152 struct macsec_rx_sa_stats __percpu *stats;
153 struct macsec_rx_sc *sc;
157 struct pcpu_rx_sc_stats {
158 struct macsec_rx_sc_stats stats;
159 struct u64_stats_sync syncp;
163 * struct macsec_rx_sc - receive secure channel
164 * @sci: secure channel identifier for this SC
165 * @active: channel is active
166 * @sa: array of secure associations
167 * @stats: per-SC stats
169 struct macsec_rx_sc {
170 struct macsec_rx_sc __rcu *next;
173 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
174 struct pcpu_rx_sc_stats __percpu *stats;
176 struct rcu_head rcu_head;
180 * struct macsec_tx_sa - transmit secure association
182 * @next_pn: packet number to use for the next packet
183 * @lock: protects next_pn manipulations
184 * @key: key structure
185 * @stats: per-SA stats
187 struct macsec_tx_sa {
188 struct macsec_key key;
193 struct macsec_tx_sa_stats __percpu *stats;
197 struct pcpu_tx_sc_stats {
198 struct macsec_tx_sc_stats stats;
199 struct u64_stats_sync syncp;
203 * struct macsec_tx_sc - transmit secure channel
205 * @encoding_sa: association number of the SA currently in use
206 * @encrypt: encrypt packets on transmit, or authenticate only
207 * @send_sci: always include the SCI in the SecTAG
209 * @scb: single copy broadcast flag
210 * @sa: array of secure associations
211 * @stats: stats for this TXSC
213 struct macsec_tx_sc {
220 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
221 struct pcpu_tx_sc_stats __percpu *stats;
224 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
227 * struct macsec_secy - MACsec Security Entity
228 * @netdev: netdevice for this SecY
229 * @n_rx_sc: number of receive secure channels configured on this SecY
230 * @sci: secure channel identifier used for tx
231 * @key_len: length of keys used by the cipher suite
232 * @icv_len: length of ICV used by the cipher suite
233 * @validate_frames: validation mode
234 * @operational: MAC_Operational flag
235 * @protect_frames: enable protection for this SecY
236 * @replay_protect: enable packet number checks on receive
237 * @replay_window: size of the replay window
238 * @tx_sc: transmit secure channel
239 * @rx_sc: linked list of receive secure channels
242 struct net_device *netdev;
243 unsigned int n_rx_sc;
247 enum macsec_validation_type validate_frames;
252 struct macsec_tx_sc tx_sc;
253 struct macsec_rx_sc __rcu *rx_sc;
256 struct pcpu_secy_stats {
257 struct macsec_dev_stats stats;
258 struct u64_stats_sync syncp;
262 * struct macsec_dev - private data
264 * @real_dev: pointer to underlying netdevice
265 * @stats: MACsec device stats
266 * @secys: linked list of SecY's on the underlying device
269 struct macsec_secy secy;
270 struct net_device *real_dev;
271 struct pcpu_secy_stats __percpu *stats;
272 struct list_head secys;
273 struct gro_cells gro_cells;
274 unsigned int nest_level;
278 * struct macsec_rxh_data - rx_handler private argument
279 * @secys: linked list of SecY's on this underlying device
281 struct macsec_rxh_data {
282 struct list_head secys;
285 static struct macsec_dev *macsec_priv(const struct net_device *dev)
287 return (struct macsec_dev *)netdev_priv(dev);
290 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
292 return rcu_dereference_bh(dev->rx_handler_data);
295 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
297 return rtnl_dereference(dev->rx_handler_data);
301 struct aead_request *req;
303 struct macsec_tx_sa *tx_sa;
304 struct macsec_rx_sa *rx_sa;
311 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
313 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
315 if (!sa || !sa->active)
318 if (!refcount_inc_not_zero(&sa->refcnt))
324 static void free_rx_sc_rcu(struct rcu_head *head)
326 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
328 free_percpu(rx_sc->stats);
332 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
334 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
337 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
339 if (refcount_dec_and_test(&sc->refcnt))
340 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
343 static void free_rxsa(struct rcu_head *head)
345 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
347 crypto_free_aead(sa->key.tfm);
348 free_percpu(sa->stats);
352 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
354 if (refcount_dec_and_test(&sa->refcnt))
355 call_rcu(&sa->rcu, free_rxsa);
358 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
360 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
362 if (!sa || !sa->active)
365 if (!refcount_inc_not_zero(&sa->refcnt))
371 static void free_txsa(struct rcu_head *head)
373 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
375 crypto_free_aead(sa->key.tfm);
376 free_percpu(sa->stats);
380 static void macsec_txsa_put(struct macsec_tx_sa *sa)
382 if (refcount_dec_and_test(&sa->refcnt))
383 call_rcu(&sa->rcu, free_txsa);
386 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
388 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
389 return (struct macsec_cb *)skb->cb;
392 #define MACSEC_PORT_ES (htons(0x0001))
393 #define MACSEC_PORT_SCB (0x0000)
394 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
396 #define MACSEC_GCM_AES_128_SAK_LEN 16
397 #define MACSEC_GCM_AES_256_SAK_LEN 32
399 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
400 #define DEFAULT_SEND_SCI true
401 #define DEFAULT_ENCRYPT false
402 #define DEFAULT_ENCODING_SA 0
404 static bool send_sci(const struct macsec_secy *secy)
406 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
408 return tx_sc->send_sci ||
409 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
412 static sci_t make_sci(u8 *addr, __be16 port)
416 memcpy(&sci, addr, ETH_ALEN);
417 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
422 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
427 memcpy(&sci, hdr->secure_channel_id,
428 sizeof(hdr->secure_channel_id));
430 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
435 static unsigned int macsec_sectag_len(bool sci_present)
437 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
440 static unsigned int macsec_hdr_len(bool sci_present)
442 return macsec_sectag_len(sci_present) + ETH_HLEN;
445 static unsigned int macsec_extra_len(bool sci_present)
447 return macsec_sectag_len(sci_present) + sizeof(__be16);
450 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
451 static void macsec_fill_sectag(struct macsec_eth_header *h,
452 const struct macsec_secy *secy, u32 pn,
455 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
457 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
458 h->eth.h_proto = htons(ETH_P_MACSEC);
461 h->tci_an |= MACSEC_TCI_SC;
462 memcpy(&h->secure_channel_id, &secy->sci,
463 sizeof(h->secure_channel_id));
465 if (tx_sc->end_station)
466 h->tci_an |= MACSEC_TCI_ES;
468 h->tci_an |= MACSEC_TCI_SCB;
471 h->packet_number = htonl(pn);
473 /* with GCM, C/E clear for !encrypt, both set for encrypt */
475 h->tci_an |= MACSEC_TCI_CONFID;
476 else if (secy->icv_len != DEFAULT_ICV_LEN)
477 h->tci_an |= MACSEC_TCI_C;
479 h->tci_an |= tx_sc->encoding_sa;
482 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
484 if (data_len < MIN_NON_SHORT_LEN)
485 h->short_length = data_len;
488 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
489 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
491 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
492 int len = skb->len - 2 * ETH_ALEN;
493 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
495 /* a) It comprises at least 17 octets */
499 /* b) MACsec EtherType: already checked */
501 /* c) V bit is clear */
502 if (h->tci_an & MACSEC_TCI_VERSION)
505 /* d) ES or SCB => !SC */
506 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
507 (h->tci_an & MACSEC_TCI_SC))
510 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
514 /* rx.pn != 0 (figure 10-5) */
515 if (!h->packet_number)
518 /* length check, f) g) h) i) */
520 return len == extra_len + h->short_length;
521 return len >= extra_len + MIN_NON_SHORT_LEN;
524 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
525 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
527 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
529 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
532 gcm_iv->pn = htonl(pn);
535 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
537 return (struct macsec_eth_header *)skb_mac_header(skb);
540 static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
544 spin_lock_bh(&tx_sa->lock);
548 if (tx_sa->next_pn == 0) {
549 pr_debug("PN wrapped, transitioning to !oper\n");
550 tx_sa->active = false;
551 if (secy->protect_frames)
552 secy->operational = false;
554 spin_unlock_bh(&tx_sa->lock);
559 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
561 struct macsec_dev *macsec = netdev_priv(dev);
563 skb->dev = macsec->real_dev;
564 skb_reset_mac_header(skb);
565 skb->protocol = eth_hdr(skb)->h_proto;
568 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
569 struct macsec_tx_sa *tx_sa)
571 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
573 u64_stats_update_begin(&txsc_stats->syncp);
574 if (tx_sc->encrypt) {
575 txsc_stats->stats.OutOctetsEncrypted += skb->len;
576 txsc_stats->stats.OutPktsEncrypted++;
577 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
579 txsc_stats->stats.OutOctetsProtected += skb->len;
580 txsc_stats->stats.OutPktsProtected++;
581 this_cpu_inc(tx_sa->stats->OutPktsProtected);
583 u64_stats_update_end(&txsc_stats->syncp);
586 static void count_tx(struct net_device *dev, int ret, int len)
588 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
589 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
591 u64_stats_update_begin(&stats->syncp);
593 stats->tx_bytes += len;
594 u64_stats_update_end(&stats->syncp);
598 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
600 struct sk_buff *skb = base->data;
601 struct net_device *dev = skb->dev;
602 struct macsec_dev *macsec = macsec_priv(dev);
603 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
606 aead_request_free(macsec_skb_cb(skb)->req);
609 macsec_encrypt_finish(skb, dev);
610 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
612 ret = dev_queue_xmit(skb);
613 count_tx(dev, ret, len);
614 rcu_read_unlock_bh();
620 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
622 struct scatterlist **sg,
625 size_t size, iv_offset, sg_offset;
626 struct aead_request *req;
629 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
631 size += GCM_AES_IV_LEN;
633 size = ALIGN(size, __alignof__(struct scatterlist));
635 size += sizeof(struct scatterlist) * num_frags;
637 tmp = kmalloc(size, GFP_ATOMIC);
641 *iv = (unsigned char *)(tmp + iv_offset);
642 *sg = (struct scatterlist *)(tmp + sg_offset);
645 aead_request_set_tfm(req, tfm);
650 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
651 struct net_device *dev)
654 struct scatterlist *sg;
655 struct sk_buff *trailer;
658 struct macsec_eth_header *hh;
659 size_t unprotected_len;
660 struct aead_request *req;
661 struct macsec_secy *secy;
662 struct macsec_tx_sc *tx_sc;
663 struct macsec_tx_sa *tx_sa;
664 struct macsec_dev *macsec = macsec_priv(dev);
668 secy = &macsec->secy;
669 tx_sc = &secy->tx_sc;
671 /* 10.5.1 TX SA assignment */
672 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
674 secy->operational = false;
676 return ERR_PTR(-EINVAL);
679 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
680 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
681 struct sk_buff *nskb = skb_copy_expand(skb,
682 MACSEC_NEEDED_HEADROOM,
683 MACSEC_NEEDED_TAILROOM,
689 macsec_txsa_put(tx_sa);
691 return ERR_PTR(-ENOMEM);
694 skb = skb_unshare(skb, GFP_ATOMIC);
696 macsec_txsa_put(tx_sa);
697 return ERR_PTR(-ENOMEM);
701 unprotected_len = skb->len;
703 sci_present = send_sci(secy);
704 hh = skb_push(skb, macsec_extra_len(sci_present));
705 memmove(hh, eth, 2 * ETH_ALEN);
707 pn = tx_sa_update_pn(tx_sa, secy);
709 macsec_txsa_put(tx_sa);
711 return ERR_PTR(-ENOLINK);
713 macsec_fill_sectag(hh, secy, pn, sci_present);
714 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
716 skb_put(skb, secy->icv_len);
718 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
719 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
721 u64_stats_update_begin(&secy_stats->syncp);
722 secy_stats->stats.OutPktsTooLong++;
723 u64_stats_update_end(&secy_stats->syncp);
725 macsec_txsa_put(tx_sa);
727 return ERR_PTR(-EINVAL);
730 ret = skb_cow_data(skb, 0, &trailer);
731 if (unlikely(ret < 0)) {
732 macsec_txsa_put(tx_sa);
737 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
739 macsec_txsa_put(tx_sa);
741 return ERR_PTR(-ENOMEM);
744 macsec_fill_iv(iv, secy->sci, pn);
746 sg_init_table(sg, ret);
747 ret = skb_to_sgvec(skb, sg, 0, skb->len);
748 if (unlikely(ret < 0)) {
749 aead_request_free(req);
750 macsec_txsa_put(tx_sa);
755 if (tx_sc->encrypt) {
756 int len = skb->len - macsec_hdr_len(sci_present) -
758 aead_request_set_crypt(req, sg, sg, len, iv);
759 aead_request_set_ad(req, macsec_hdr_len(sci_present));
761 aead_request_set_crypt(req, sg, sg, 0, iv);
762 aead_request_set_ad(req, skb->len - secy->icv_len);
765 macsec_skb_cb(skb)->req = req;
766 macsec_skb_cb(skb)->tx_sa = tx_sa;
767 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
770 ret = crypto_aead_encrypt(req);
771 if (ret == -EINPROGRESS) {
773 } else if (ret != 0) {
776 aead_request_free(req);
777 macsec_txsa_put(tx_sa);
778 return ERR_PTR(-EINVAL);
782 aead_request_free(req);
783 macsec_txsa_put(tx_sa);
788 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
790 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
791 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
792 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
795 spin_lock(&rx_sa->lock);
796 if (rx_sa->next_pn >= secy->replay_window)
797 lowest_pn = rx_sa->next_pn - secy->replay_window;
799 /* Now perform replay protection check again
800 * (see IEEE 802.1AE-2006 figure 10-5)
802 if (secy->replay_protect && pn < lowest_pn) {
803 spin_unlock(&rx_sa->lock);
804 u64_stats_update_begin(&rxsc_stats->syncp);
805 rxsc_stats->stats.InPktsLate++;
806 u64_stats_update_end(&rxsc_stats->syncp);
810 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
811 u64_stats_update_begin(&rxsc_stats->syncp);
812 if (hdr->tci_an & MACSEC_TCI_E)
813 rxsc_stats->stats.InOctetsDecrypted += skb->len;
815 rxsc_stats->stats.InOctetsValidated += skb->len;
816 u64_stats_update_end(&rxsc_stats->syncp);
819 if (!macsec_skb_cb(skb)->valid) {
820 spin_unlock(&rx_sa->lock);
823 if (hdr->tci_an & MACSEC_TCI_C ||
824 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
825 u64_stats_update_begin(&rxsc_stats->syncp);
826 rxsc_stats->stats.InPktsNotValid++;
827 u64_stats_update_end(&rxsc_stats->syncp);
831 u64_stats_update_begin(&rxsc_stats->syncp);
832 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
833 rxsc_stats->stats.InPktsInvalid++;
834 this_cpu_inc(rx_sa->stats->InPktsInvalid);
835 } else if (pn < lowest_pn) {
836 rxsc_stats->stats.InPktsDelayed++;
838 rxsc_stats->stats.InPktsUnchecked++;
840 u64_stats_update_end(&rxsc_stats->syncp);
842 u64_stats_update_begin(&rxsc_stats->syncp);
843 if (pn < lowest_pn) {
844 rxsc_stats->stats.InPktsDelayed++;
846 rxsc_stats->stats.InPktsOK++;
847 this_cpu_inc(rx_sa->stats->InPktsOK);
849 u64_stats_update_end(&rxsc_stats->syncp);
851 if (pn >= rx_sa->next_pn)
852 rx_sa->next_pn = pn + 1;
853 spin_unlock(&rx_sa->lock);
859 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
861 skb->pkt_type = PACKET_HOST;
862 skb->protocol = eth_type_trans(skb, dev);
864 skb_reset_network_header(skb);
865 if (!skb_transport_header_was_set(skb))
866 skb_reset_transport_header(skb);
867 skb_reset_mac_len(skb);
870 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
872 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
873 skb_pull(skb, hdr_len);
874 pskb_trim_unique(skb, skb->len - icv_len);
877 static void count_rx(struct net_device *dev, int len)
879 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
881 u64_stats_update_begin(&stats->syncp);
883 stats->rx_bytes += len;
884 u64_stats_update_end(&stats->syncp);
887 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
889 struct sk_buff *skb = base->data;
890 struct net_device *dev = skb->dev;
891 struct macsec_dev *macsec = macsec_priv(dev);
892 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
893 struct macsec_rx_sc *rx_sc = rx_sa->sc;
897 aead_request_free(macsec_skb_cb(skb)->req);
900 macsec_skb_cb(skb)->valid = true;
903 pn = ntohl(macsec_ethhdr(skb)->packet_number);
904 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
905 rcu_read_unlock_bh();
910 macsec_finalize_skb(skb, macsec->secy.icv_len,
911 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
912 macsec_reset_skb(skb, macsec->secy.netdev);
915 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
918 rcu_read_unlock_bh();
921 macsec_rxsa_put(rx_sa);
922 macsec_rxsc_put(rx_sc);
926 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
927 struct net_device *dev,
928 struct macsec_rx_sa *rx_sa,
930 struct macsec_secy *secy)
933 struct scatterlist *sg;
934 struct sk_buff *trailer;
936 struct aead_request *req;
937 struct macsec_eth_header *hdr;
938 u16 icv_len = secy->icv_len;
940 macsec_skb_cb(skb)->valid = false;
941 skb = skb_share_check(skb, GFP_ATOMIC);
943 return ERR_PTR(-ENOMEM);
945 ret = skb_cow_data(skb, 0, &trailer);
946 if (unlikely(ret < 0)) {
950 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
953 return ERR_PTR(-ENOMEM);
956 hdr = (struct macsec_eth_header *)skb->data;
957 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
959 sg_init_table(sg, ret);
960 ret = skb_to_sgvec(skb, sg, 0, skb->len);
961 if (unlikely(ret < 0)) {
962 aead_request_free(req);
967 if (hdr->tci_an & MACSEC_TCI_E) {
968 /* confidentiality: ethernet + macsec header
969 * authenticated, encrypted payload
971 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
973 aead_request_set_crypt(req, sg, sg, len, iv);
974 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
975 skb = skb_unshare(skb, GFP_ATOMIC);
977 aead_request_free(req);
978 return ERR_PTR(-ENOMEM);
981 /* integrity only: all headers + data authenticated */
982 aead_request_set_crypt(req, sg, sg, icv_len, iv);
983 aead_request_set_ad(req, skb->len - icv_len);
986 macsec_skb_cb(skb)->req = req;
988 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
991 ret = crypto_aead_decrypt(req);
992 if (ret == -EINPROGRESS) {
994 } else if (ret != 0) {
995 /* decryption/authentication failed
996 * 10.6 if validateFrames is disabled, deliver anyway
998 if (ret != -EBADMSG) {
1003 macsec_skb_cb(skb)->valid = true;
1007 aead_request_free(req);
1012 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
1014 struct macsec_rx_sc *rx_sc;
1016 for_each_rxsc(secy, rx_sc) {
1017 if (rx_sc->sci == sci)
1024 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
1026 struct macsec_rx_sc *rx_sc;
1028 for_each_rxsc_rtnl(secy, rx_sc) {
1029 if (rx_sc->sci == sci)
1036 static void handle_not_macsec(struct sk_buff *skb)
1038 struct macsec_rxh_data *rxd;
1039 struct macsec_dev *macsec;
1042 rxd = macsec_data_rcu(skb->dev);
1044 /* 10.6 If the management control validateFrames is not
1045 * Strict, frames without a SecTAG are received, counted, and
1046 * delivered to the Controlled Port
1048 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1049 struct sk_buff *nskb;
1050 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1052 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1053 u64_stats_update_begin(&secy_stats->syncp);
1054 secy_stats->stats.InPktsNoTag++;
1055 u64_stats_update_end(&secy_stats->syncp);
1059 /* deliver on this port */
1060 nskb = skb_clone(skb, GFP_ATOMIC);
1064 nskb->dev = macsec->secy.netdev;
1066 if (netif_rx(nskb) == NET_RX_SUCCESS) {
1067 u64_stats_update_begin(&secy_stats->syncp);
1068 secy_stats->stats.InPktsUntagged++;
1069 u64_stats_update_end(&secy_stats->syncp);
1076 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1078 struct sk_buff *skb = *pskb;
1079 struct net_device *dev = skb->dev;
1080 struct macsec_eth_header *hdr;
1081 struct macsec_secy *secy = NULL;
1082 struct macsec_rx_sc *rx_sc;
1083 struct macsec_rx_sa *rx_sa;
1084 struct macsec_rxh_data *rxd;
1085 struct macsec_dev *macsec;
1089 struct pcpu_rx_sc_stats *rxsc_stats;
1090 struct pcpu_secy_stats *secy_stats;
1094 if (skb_headroom(skb) < ETH_HLEN)
1097 hdr = macsec_ethhdr(skb);
1098 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1099 handle_not_macsec(skb);
1101 /* and deliver to the uncontrolled port */
1102 return RX_HANDLER_PASS;
1105 skb = skb_unshare(skb, GFP_ATOMIC);
1108 return RX_HANDLER_CONSUMED;
1111 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1113 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1117 hdr = macsec_ethhdr(skb);
1119 /* Frames with a SecTAG that has the TCI E bit set but the C
1120 * bit clear are discarded, as this reserved encoding is used
1121 * to identify frames with a SecTAG that are not to be
1122 * delivered to the Controlled Port.
1124 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1125 return RX_HANDLER_PASS;
1127 /* now, pull the extra length */
1128 if (hdr->tci_an & MACSEC_TCI_SC) {
1133 /* ethernet header is part of crypto processing */
1134 skb_push(skb, ETH_HLEN);
1136 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1137 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1138 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1141 rxd = macsec_data_rcu(skb->dev);
1143 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1144 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1146 sc = sc ? macsec_rxsc_get(sc) : NULL;
1149 secy = &macsec->secy;
1159 macsec = macsec_priv(dev);
1160 secy_stats = this_cpu_ptr(macsec->stats);
1161 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1163 if (!macsec_validate_skb(skb, secy->icv_len)) {
1164 u64_stats_update_begin(&secy_stats->syncp);
1165 secy_stats->stats.InPktsBadTag++;
1166 u64_stats_update_end(&secy_stats->syncp);
1170 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1172 /* 10.6.1 if the SA is not in use */
1174 /* If validateFrames is Strict or the C bit in the
1175 * SecTAG is set, discard
1177 if (hdr->tci_an & MACSEC_TCI_C ||
1178 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1179 u64_stats_update_begin(&rxsc_stats->syncp);
1180 rxsc_stats->stats.InPktsNotUsingSA++;
1181 u64_stats_update_end(&rxsc_stats->syncp);
1185 /* not Strict, the frame (with the SecTAG and ICV
1186 * removed) is delivered to the Controlled Port.
1188 u64_stats_update_begin(&rxsc_stats->syncp);
1189 rxsc_stats->stats.InPktsUnusedSA++;
1190 u64_stats_update_end(&rxsc_stats->syncp);
1194 /* First, PN check to avoid decrypting obviously wrong packets */
1195 pn = ntohl(hdr->packet_number);
1196 if (secy->replay_protect) {
1199 spin_lock(&rx_sa->lock);
1200 late = rx_sa->next_pn >= secy->replay_window &&
1201 pn < (rx_sa->next_pn - secy->replay_window);
1202 spin_unlock(&rx_sa->lock);
1205 u64_stats_update_begin(&rxsc_stats->syncp);
1206 rxsc_stats->stats.InPktsLate++;
1207 u64_stats_update_end(&rxsc_stats->syncp);
1212 macsec_skb_cb(skb)->rx_sa = rx_sa;
1214 /* Disabled && !changed text => skip validation */
1215 if (hdr->tci_an & MACSEC_TCI_C ||
1216 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1217 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1220 /* the decrypt callback needs the reference */
1221 if (PTR_ERR(skb) != -EINPROGRESS) {
1222 macsec_rxsa_put(rx_sa);
1223 macsec_rxsc_put(rx_sc);
1227 return RX_HANDLER_CONSUMED;
1230 if (!macsec_post_decrypt(skb, secy, pn))
1234 macsec_finalize_skb(skb, secy->icv_len,
1235 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1236 macsec_reset_skb(skb, secy->netdev);
1239 macsec_rxsa_put(rx_sa);
1240 macsec_rxsc_put(rx_sc);
1242 ret = gro_cells_receive(&macsec->gro_cells, skb);
1243 if (ret == NET_RX_SUCCESS)
1244 count_rx(dev, skb->len);
1246 macsec->secy.netdev->stats.rx_dropped++;
1251 return RX_HANDLER_CONSUMED;
1254 macsec_rxsa_put(rx_sa);
1256 macsec_rxsc_put(rx_sc);
1261 return RX_HANDLER_CONSUMED;
1264 /* 10.6.1 if the SC is not found */
1265 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1267 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1268 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1270 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1271 struct sk_buff *nskb;
1273 secy_stats = this_cpu_ptr(macsec->stats);
1275 /* If validateFrames is Strict or the C bit in the
1276 * SecTAG is set, discard
1279 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1280 u64_stats_update_begin(&secy_stats->syncp);
1281 secy_stats->stats.InPktsNoSCI++;
1282 u64_stats_update_end(&secy_stats->syncp);
1286 /* not strict, the frame (with the SecTAG and ICV
1287 * removed) is delivered to the Controlled Port.
1289 nskb = skb_clone(skb, GFP_ATOMIC);
1293 macsec_reset_skb(nskb, macsec->secy.netdev);
1295 ret = netif_rx(nskb);
1296 if (ret == NET_RX_SUCCESS) {
1297 u64_stats_update_begin(&secy_stats->syncp);
1298 secy_stats->stats.InPktsUnknownSCI++;
1299 u64_stats_update_end(&secy_stats->syncp);
1301 macsec->secy.netdev->stats.rx_dropped++;
1307 return RX_HANDLER_PASS;
1310 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1312 struct crypto_aead *tfm;
1315 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1320 ret = crypto_aead_setkey(tfm, key, key_len);
1324 ret = crypto_aead_setauthsize(tfm, icv_len);
1330 crypto_free_aead(tfm);
1331 return ERR_PTR(ret);
1334 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1337 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1341 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1342 if (IS_ERR(rx_sa->key.tfm)) {
1343 free_percpu(rx_sa->stats);
1344 return PTR_ERR(rx_sa->key.tfm);
1347 rx_sa->active = false;
1349 refcount_set(&rx_sa->refcnt, 1);
1350 spin_lock_init(&rx_sa->lock);
1355 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1357 rx_sa->active = false;
1359 macsec_rxsa_put(rx_sa);
1362 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1366 for (i = 0; i < MACSEC_NUM_AN; i++) {
1367 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1369 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1374 macsec_rxsc_put(rx_sc);
1377 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1379 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1381 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1383 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1384 if (rx_sc->sci == sci) {
1387 rcu_assign_pointer(*rx_scp, rx_sc->next);
1395 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1397 struct macsec_rx_sc *rx_sc;
1398 struct macsec_dev *macsec;
1399 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1400 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1401 struct macsec_secy *secy;
1403 list_for_each_entry(macsec, &rxd->secys, secys) {
1404 if (find_rx_sc_rtnl(&macsec->secy, sci))
1405 return ERR_PTR(-EEXIST);
1408 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1410 return ERR_PTR(-ENOMEM);
1412 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1413 if (!rx_sc->stats) {
1415 return ERR_PTR(-ENOMEM);
1419 rx_sc->active = true;
1420 refcount_set(&rx_sc->refcnt, 1);
1422 secy = &macsec_priv(dev)->secy;
1423 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1424 rcu_assign_pointer(secy->rx_sc, rx_sc);
1432 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1435 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1439 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1440 if (IS_ERR(tx_sa->key.tfm)) {
1441 free_percpu(tx_sa->stats);
1442 return PTR_ERR(tx_sa->key.tfm);
1445 tx_sa->active = false;
1446 refcount_set(&tx_sa->refcnt, 1);
1447 spin_lock_init(&tx_sa->lock);
1452 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1454 tx_sa->active = false;
1456 macsec_txsa_put(tx_sa);
1459 static struct genl_family macsec_fam;
1461 static struct net_device *get_dev_from_nl(struct net *net,
1462 struct nlattr **attrs)
1464 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1465 struct net_device *dev;
1467 dev = __dev_get_by_index(net, ifindex);
1469 return ERR_PTR(-ENODEV);
1471 if (!netif_is_macsec(dev))
1472 return ERR_PTR(-ENODEV);
1477 static sci_t nla_get_sci(const struct nlattr *nla)
1479 return (__force sci_t)nla_get_u64(nla);
1482 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1485 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1488 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1489 struct nlattr **attrs,
1490 struct nlattr **tb_sa,
1491 struct net_device **devp,
1492 struct macsec_secy **secyp,
1493 struct macsec_tx_sc **scp,
1496 struct net_device *dev;
1497 struct macsec_secy *secy;
1498 struct macsec_tx_sc *tx_sc;
1499 struct macsec_tx_sa *tx_sa;
1501 if (!tb_sa[MACSEC_SA_ATTR_AN])
1502 return ERR_PTR(-EINVAL);
1504 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1506 dev = get_dev_from_nl(net, attrs);
1508 return ERR_CAST(dev);
1510 if (*assoc_num >= MACSEC_NUM_AN)
1511 return ERR_PTR(-EINVAL);
1513 secy = &macsec_priv(dev)->secy;
1514 tx_sc = &secy->tx_sc;
1516 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1518 return ERR_PTR(-ENODEV);
1526 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1527 struct nlattr **attrs,
1528 struct nlattr **tb_rxsc,
1529 struct net_device **devp,
1530 struct macsec_secy **secyp)
1532 struct net_device *dev;
1533 struct macsec_secy *secy;
1534 struct macsec_rx_sc *rx_sc;
1537 dev = get_dev_from_nl(net, attrs);
1539 return ERR_CAST(dev);
1541 secy = &macsec_priv(dev)->secy;
1543 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1544 return ERR_PTR(-EINVAL);
1546 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1547 rx_sc = find_rx_sc_rtnl(secy, sci);
1549 return ERR_PTR(-ENODEV);
1557 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1558 struct nlattr **attrs,
1559 struct nlattr **tb_rxsc,
1560 struct nlattr **tb_sa,
1561 struct net_device **devp,
1562 struct macsec_secy **secyp,
1563 struct macsec_rx_sc **scp,
1566 struct macsec_rx_sc *rx_sc;
1567 struct macsec_rx_sa *rx_sa;
1569 if (!tb_sa[MACSEC_SA_ATTR_AN])
1570 return ERR_PTR(-EINVAL);
1572 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1573 if (*assoc_num >= MACSEC_NUM_AN)
1574 return ERR_PTR(-EINVAL);
1576 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1578 return ERR_CAST(rx_sc);
1580 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1582 return ERR_PTR(-ENODEV);
1588 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1589 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1590 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1591 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1594 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1595 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1596 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1599 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1600 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1601 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1602 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1603 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1604 .len = MACSEC_KEYID_LEN, },
1605 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1606 .len = MACSEC_MAX_KEY_LEN, },
1609 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1611 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1614 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX,
1615 attrs[MACSEC_ATTR_SA_CONFIG],
1616 macsec_genl_sa_policy, NULL))
1622 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1624 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1627 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX,
1628 attrs[MACSEC_ATTR_RXSC_CONFIG],
1629 macsec_genl_rxsc_policy, NULL))
1635 static bool validate_add_rxsa(struct nlattr **attrs)
1637 if (!attrs[MACSEC_SA_ATTR_AN] ||
1638 !attrs[MACSEC_SA_ATTR_KEY] ||
1639 !attrs[MACSEC_SA_ATTR_KEYID])
1642 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1645 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1648 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1649 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1653 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1659 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1661 struct net_device *dev;
1662 struct nlattr **attrs = info->attrs;
1663 struct macsec_secy *secy;
1664 struct macsec_rx_sc *rx_sc;
1665 struct macsec_rx_sa *rx_sa;
1666 unsigned char assoc_num;
1667 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1668 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1671 if (!attrs[MACSEC_ATTR_IFINDEX])
1674 if (parse_sa_config(attrs, tb_sa))
1677 if (parse_rxsc_config(attrs, tb_rxsc))
1680 if (!validate_add_rxsa(tb_sa))
1684 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1685 if (IS_ERR(rx_sc)) {
1687 return PTR_ERR(rx_sc);
1690 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1692 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1693 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1694 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1699 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1705 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1711 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1712 secy->key_len, secy->icv_len);
1719 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1720 spin_lock_bh(&rx_sa->lock);
1721 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1722 spin_unlock_bh(&rx_sa->lock);
1725 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1726 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1728 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1730 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1737 static bool validate_add_rxsc(struct nlattr **attrs)
1739 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1742 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1743 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1750 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1752 struct net_device *dev;
1753 sci_t sci = MACSEC_UNDEF_SCI;
1754 struct nlattr **attrs = info->attrs;
1755 struct macsec_rx_sc *rx_sc;
1756 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1758 if (!attrs[MACSEC_ATTR_IFINDEX])
1761 if (parse_rxsc_config(attrs, tb_rxsc))
1764 if (!validate_add_rxsc(tb_rxsc))
1768 dev = get_dev_from_nl(genl_info_net(info), attrs);
1771 return PTR_ERR(dev);
1774 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1776 rx_sc = create_rx_sc(dev, sci);
1777 if (IS_ERR(rx_sc)) {
1779 return PTR_ERR(rx_sc);
1782 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1783 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1790 static bool validate_add_txsa(struct nlattr **attrs)
1792 if (!attrs[MACSEC_SA_ATTR_AN] ||
1793 !attrs[MACSEC_SA_ATTR_PN] ||
1794 !attrs[MACSEC_SA_ATTR_KEY] ||
1795 !attrs[MACSEC_SA_ATTR_KEYID])
1798 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1801 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1804 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1805 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1809 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1815 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1817 struct net_device *dev;
1818 struct nlattr **attrs = info->attrs;
1819 struct macsec_secy *secy;
1820 struct macsec_tx_sc *tx_sc;
1821 struct macsec_tx_sa *tx_sa;
1822 unsigned char assoc_num;
1823 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1826 if (!attrs[MACSEC_ATTR_IFINDEX])
1829 if (parse_sa_config(attrs, tb_sa))
1832 if (!validate_add_txsa(tb_sa))
1836 dev = get_dev_from_nl(genl_info_net(info), attrs);
1839 return PTR_ERR(dev);
1842 secy = &macsec_priv(dev)->secy;
1843 tx_sc = &secy->tx_sc;
1845 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1847 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1848 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1849 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1854 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1860 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1866 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1867 secy->key_len, secy->icv_len);
1874 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1876 spin_lock_bh(&tx_sa->lock);
1877 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1878 spin_unlock_bh(&tx_sa->lock);
1880 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1881 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1883 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1884 secy->operational = true;
1886 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1893 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1895 struct nlattr **attrs = info->attrs;
1896 struct net_device *dev;
1897 struct macsec_secy *secy;
1898 struct macsec_rx_sc *rx_sc;
1899 struct macsec_rx_sa *rx_sa;
1901 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1902 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1904 if (!attrs[MACSEC_ATTR_IFINDEX])
1907 if (parse_sa_config(attrs, tb_sa))
1910 if (parse_rxsc_config(attrs, tb_rxsc))
1914 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1915 &dev, &secy, &rx_sc, &assoc_num);
1916 if (IS_ERR(rx_sa)) {
1918 return PTR_ERR(rx_sa);
1921 if (rx_sa->active) {
1926 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1934 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1936 struct nlattr **attrs = info->attrs;
1937 struct net_device *dev;
1938 struct macsec_secy *secy;
1939 struct macsec_rx_sc *rx_sc;
1941 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1943 if (!attrs[MACSEC_ATTR_IFINDEX])
1946 if (parse_rxsc_config(attrs, tb_rxsc))
1949 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1953 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1956 return PTR_ERR(dev);
1959 secy = &macsec_priv(dev)->secy;
1960 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1962 rx_sc = del_rx_sc(secy, sci);
1974 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1976 struct nlattr **attrs = info->attrs;
1977 struct net_device *dev;
1978 struct macsec_secy *secy;
1979 struct macsec_tx_sc *tx_sc;
1980 struct macsec_tx_sa *tx_sa;
1982 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1984 if (!attrs[MACSEC_ATTR_IFINDEX])
1987 if (parse_sa_config(attrs, tb_sa))
1991 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1992 &dev, &secy, &tx_sc, &assoc_num);
1993 if (IS_ERR(tx_sa)) {
1995 return PTR_ERR(tx_sa);
1998 if (tx_sa->active) {
2003 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2011 static bool validate_upd_sa(struct nlattr **attrs)
2013 if (!attrs[MACSEC_SA_ATTR_AN] ||
2014 attrs[MACSEC_SA_ATTR_KEY] ||
2015 attrs[MACSEC_SA_ATTR_KEYID])
2018 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2021 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2024 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2025 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2032 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2034 struct nlattr **attrs = info->attrs;
2035 struct net_device *dev;
2036 struct macsec_secy *secy;
2037 struct macsec_tx_sc *tx_sc;
2038 struct macsec_tx_sa *tx_sa;
2040 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2042 if (!attrs[MACSEC_ATTR_IFINDEX])
2045 if (parse_sa_config(attrs, tb_sa))
2048 if (!validate_upd_sa(tb_sa))
2052 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2053 &dev, &secy, &tx_sc, &assoc_num);
2054 if (IS_ERR(tx_sa)) {
2056 return PTR_ERR(tx_sa);
2059 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2060 spin_lock_bh(&tx_sa->lock);
2061 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2062 spin_unlock_bh(&tx_sa->lock);
2065 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2066 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2068 if (assoc_num == tx_sc->encoding_sa)
2069 secy->operational = tx_sa->active;
2076 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2078 struct nlattr **attrs = info->attrs;
2079 struct net_device *dev;
2080 struct macsec_secy *secy;
2081 struct macsec_rx_sc *rx_sc;
2082 struct macsec_rx_sa *rx_sa;
2084 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2085 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2087 if (!attrs[MACSEC_ATTR_IFINDEX])
2090 if (parse_rxsc_config(attrs, tb_rxsc))
2093 if (parse_sa_config(attrs, tb_sa))
2096 if (!validate_upd_sa(tb_sa))
2100 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2101 &dev, &secy, &rx_sc, &assoc_num);
2102 if (IS_ERR(rx_sa)) {
2104 return PTR_ERR(rx_sa);
2107 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2108 spin_lock_bh(&rx_sa->lock);
2109 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2110 spin_unlock_bh(&rx_sa->lock);
2113 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2114 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2120 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2122 struct nlattr **attrs = info->attrs;
2123 struct net_device *dev;
2124 struct macsec_secy *secy;
2125 struct macsec_rx_sc *rx_sc;
2126 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2128 if (!attrs[MACSEC_ATTR_IFINDEX])
2131 if (parse_rxsc_config(attrs, tb_rxsc))
2134 if (!validate_add_rxsc(tb_rxsc))
2138 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2139 if (IS_ERR(rx_sc)) {
2141 return PTR_ERR(rx_sc);
2144 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2145 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2147 if (rx_sc->active != new)
2148 secy->n_rx_sc += new ? 1 : -1;
2150 rx_sc->active = new;
2158 static int copy_tx_sa_stats(struct sk_buff *skb,
2159 struct macsec_tx_sa_stats __percpu *pstats)
2161 struct macsec_tx_sa_stats sum = {0, };
2164 for_each_possible_cpu(cpu) {
2165 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2167 sum.OutPktsProtected += stats->OutPktsProtected;
2168 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2171 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2172 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2178 static int copy_rx_sa_stats(struct sk_buff *skb,
2179 struct macsec_rx_sa_stats __percpu *pstats)
2181 struct macsec_rx_sa_stats sum = {0, };
2184 for_each_possible_cpu(cpu) {
2185 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2187 sum.InPktsOK += stats->InPktsOK;
2188 sum.InPktsInvalid += stats->InPktsInvalid;
2189 sum.InPktsNotValid += stats->InPktsNotValid;
2190 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2191 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2194 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2195 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2196 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2197 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2198 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2204 static int copy_rx_sc_stats(struct sk_buff *skb,
2205 struct pcpu_rx_sc_stats __percpu *pstats)
2207 struct macsec_rx_sc_stats sum = {0, };
2210 for_each_possible_cpu(cpu) {
2211 const struct pcpu_rx_sc_stats *stats;
2212 struct macsec_rx_sc_stats tmp;
2215 stats = per_cpu_ptr(pstats, cpu);
2217 start = u64_stats_fetch_begin_irq(&stats->syncp);
2218 memcpy(&tmp, &stats->stats, sizeof(tmp));
2219 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2221 sum.InOctetsValidated += tmp.InOctetsValidated;
2222 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2223 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2224 sum.InPktsDelayed += tmp.InPktsDelayed;
2225 sum.InPktsOK += tmp.InPktsOK;
2226 sum.InPktsInvalid += tmp.InPktsInvalid;
2227 sum.InPktsLate += tmp.InPktsLate;
2228 sum.InPktsNotValid += tmp.InPktsNotValid;
2229 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2230 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2233 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2234 sum.InOctetsValidated,
2235 MACSEC_RXSC_STATS_ATTR_PAD) ||
2236 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2237 sum.InOctetsDecrypted,
2238 MACSEC_RXSC_STATS_ATTR_PAD) ||
2239 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2240 sum.InPktsUnchecked,
2241 MACSEC_RXSC_STATS_ATTR_PAD) ||
2242 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2244 MACSEC_RXSC_STATS_ATTR_PAD) ||
2245 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2247 MACSEC_RXSC_STATS_ATTR_PAD) ||
2248 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2250 MACSEC_RXSC_STATS_ATTR_PAD) ||
2251 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2253 MACSEC_RXSC_STATS_ATTR_PAD) ||
2254 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2256 MACSEC_RXSC_STATS_ATTR_PAD) ||
2257 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2258 sum.InPktsNotUsingSA,
2259 MACSEC_RXSC_STATS_ATTR_PAD) ||
2260 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2262 MACSEC_RXSC_STATS_ATTR_PAD))
2268 static int copy_tx_sc_stats(struct sk_buff *skb,
2269 struct pcpu_tx_sc_stats __percpu *pstats)
2271 struct macsec_tx_sc_stats sum = {0, };
2274 for_each_possible_cpu(cpu) {
2275 const struct pcpu_tx_sc_stats *stats;
2276 struct macsec_tx_sc_stats tmp;
2279 stats = per_cpu_ptr(pstats, cpu);
2281 start = u64_stats_fetch_begin_irq(&stats->syncp);
2282 memcpy(&tmp, &stats->stats, sizeof(tmp));
2283 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2285 sum.OutPktsProtected += tmp.OutPktsProtected;
2286 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2287 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2288 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2291 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2292 sum.OutPktsProtected,
2293 MACSEC_TXSC_STATS_ATTR_PAD) ||
2294 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2295 sum.OutPktsEncrypted,
2296 MACSEC_TXSC_STATS_ATTR_PAD) ||
2297 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2298 sum.OutOctetsProtected,
2299 MACSEC_TXSC_STATS_ATTR_PAD) ||
2300 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2301 sum.OutOctetsEncrypted,
2302 MACSEC_TXSC_STATS_ATTR_PAD))
2308 static int copy_secy_stats(struct sk_buff *skb,
2309 struct pcpu_secy_stats __percpu *pstats)
2311 struct macsec_dev_stats sum = {0, };
2314 for_each_possible_cpu(cpu) {
2315 const struct pcpu_secy_stats *stats;
2316 struct macsec_dev_stats tmp;
2319 stats = per_cpu_ptr(pstats, cpu);
2321 start = u64_stats_fetch_begin_irq(&stats->syncp);
2322 memcpy(&tmp, &stats->stats, sizeof(tmp));
2323 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2325 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2326 sum.InPktsUntagged += tmp.InPktsUntagged;
2327 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2328 sum.InPktsNoTag += tmp.InPktsNoTag;
2329 sum.InPktsBadTag += tmp.InPktsBadTag;
2330 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2331 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2332 sum.InPktsOverrun += tmp.InPktsOverrun;
2335 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2336 sum.OutPktsUntagged,
2337 MACSEC_SECY_STATS_ATTR_PAD) ||
2338 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2340 MACSEC_SECY_STATS_ATTR_PAD) ||
2341 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2343 MACSEC_SECY_STATS_ATTR_PAD) ||
2344 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2346 MACSEC_SECY_STATS_ATTR_PAD) ||
2347 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2349 MACSEC_SECY_STATS_ATTR_PAD) ||
2350 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2351 sum.InPktsUnknownSCI,
2352 MACSEC_SECY_STATS_ATTR_PAD) ||
2353 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2355 MACSEC_SECY_STATS_ATTR_PAD) ||
2356 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2358 MACSEC_SECY_STATS_ATTR_PAD))
2364 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2366 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2367 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2373 switch (secy->key_len) {
2374 case MACSEC_GCM_AES_128_SAK_LEN:
2375 csid = MACSEC_DEFAULT_CIPHER_ID;
2377 case MACSEC_GCM_AES_256_SAK_LEN:
2378 csid = MACSEC_CIPHER_ID_GCM_AES_256;
2384 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2385 MACSEC_SECY_ATTR_PAD) ||
2386 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2387 csid, MACSEC_SECY_ATTR_PAD) ||
2388 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2389 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2390 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2391 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2392 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2393 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2394 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2395 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2396 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2397 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2400 if (secy->replay_protect) {
2401 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2405 nla_nest_end(skb, secy_nest);
2409 nla_nest_cancel(skb, secy_nest);
2413 static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2414 struct sk_buff *skb, struct netlink_callback *cb)
2416 struct macsec_rx_sc *rx_sc;
2417 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2418 struct nlattr *txsa_list, *rxsc_list;
2421 struct nlattr *attr;
2423 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2424 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2428 genl_dump_check_consistent(cb, hdr);
2430 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2431 goto nla_put_failure;
2433 if (nla_put_secy(secy, skb))
2434 goto nla_put_failure;
2436 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2438 goto nla_put_failure;
2439 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2440 nla_nest_cancel(skb, attr);
2441 goto nla_put_failure;
2443 nla_nest_end(skb, attr);
2445 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2447 goto nla_put_failure;
2448 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2449 nla_nest_cancel(skb, attr);
2450 goto nla_put_failure;
2452 nla_nest_end(skb, attr);
2454 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2456 goto nla_put_failure;
2457 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2458 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2459 struct nlattr *txsa_nest;
2464 txsa_nest = nla_nest_start(skb, j++);
2466 nla_nest_cancel(skb, txsa_list);
2467 goto nla_put_failure;
2470 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2471 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2472 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2473 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2474 nla_nest_cancel(skb, txsa_nest);
2475 nla_nest_cancel(skb, txsa_list);
2476 goto nla_put_failure;
2479 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2481 nla_nest_cancel(skb, txsa_nest);
2482 nla_nest_cancel(skb, txsa_list);
2483 goto nla_put_failure;
2485 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2486 nla_nest_cancel(skb, attr);
2487 nla_nest_cancel(skb, txsa_nest);
2488 nla_nest_cancel(skb, txsa_list);
2489 goto nla_put_failure;
2491 nla_nest_end(skb, attr);
2493 nla_nest_end(skb, txsa_nest);
2495 nla_nest_end(skb, txsa_list);
2497 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2499 goto nla_put_failure;
2502 for_each_rxsc_rtnl(secy, rx_sc) {
2504 struct nlattr *rxsa_list;
2505 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2508 nla_nest_cancel(skb, rxsc_list);
2509 goto nla_put_failure;
2512 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2513 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2514 MACSEC_RXSC_ATTR_PAD)) {
2515 nla_nest_cancel(skb, rxsc_nest);
2516 nla_nest_cancel(skb, rxsc_list);
2517 goto nla_put_failure;
2520 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2522 nla_nest_cancel(skb, rxsc_nest);
2523 nla_nest_cancel(skb, rxsc_list);
2524 goto nla_put_failure;
2526 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2527 nla_nest_cancel(skb, attr);
2528 nla_nest_cancel(skb, rxsc_nest);
2529 nla_nest_cancel(skb, rxsc_list);
2530 goto nla_put_failure;
2532 nla_nest_end(skb, attr);
2534 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2536 nla_nest_cancel(skb, rxsc_nest);
2537 nla_nest_cancel(skb, rxsc_list);
2538 goto nla_put_failure;
2541 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2542 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2543 struct nlattr *rxsa_nest;
2548 rxsa_nest = nla_nest_start(skb, k++);
2550 nla_nest_cancel(skb, rxsa_list);
2551 nla_nest_cancel(skb, rxsc_nest);
2552 nla_nest_cancel(skb, rxsc_list);
2553 goto nla_put_failure;
2556 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2558 nla_nest_cancel(skb, rxsa_list);
2559 nla_nest_cancel(skb, rxsc_nest);
2560 nla_nest_cancel(skb, rxsc_list);
2561 goto nla_put_failure;
2563 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2564 nla_nest_cancel(skb, attr);
2565 nla_nest_cancel(skb, rxsa_list);
2566 nla_nest_cancel(skb, rxsc_nest);
2567 nla_nest_cancel(skb, rxsc_list);
2568 goto nla_put_failure;
2570 nla_nest_end(skb, attr);
2572 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2573 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2574 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2575 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2576 nla_nest_cancel(skb, rxsa_nest);
2577 nla_nest_cancel(skb, rxsc_nest);
2578 nla_nest_cancel(skb, rxsc_list);
2579 goto nla_put_failure;
2581 nla_nest_end(skb, rxsa_nest);
2584 nla_nest_end(skb, rxsa_list);
2585 nla_nest_end(skb, rxsc_nest);
2588 nla_nest_end(skb, rxsc_list);
2590 genlmsg_end(skb, hdr);
2595 genlmsg_cancel(skb, hdr);
2599 static int macsec_generation = 1; /* protected by RTNL */
2601 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2603 struct net *net = sock_net(skb->sk);
2604 struct net_device *dev;
2607 dev_idx = cb->args[0];
2612 cb->seq = macsec_generation;
2614 for_each_netdev(net, dev) {
2615 struct macsec_secy *secy;
2620 if (!netif_is_macsec(dev))
2623 secy = &macsec_priv(dev)->secy;
2624 if (dump_secy(secy, dev, skb, cb) < 0)
2636 static const struct genl_ops macsec_genl_ops[] = {
2638 .cmd = MACSEC_CMD_GET_TXSC,
2639 .dumpit = macsec_dump_txsc,
2640 .policy = macsec_genl_policy,
2643 .cmd = MACSEC_CMD_ADD_RXSC,
2644 .doit = macsec_add_rxsc,
2645 .policy = macsec_genl_policy,
2646 .flags = GENL_ADMIN_PERM,
2649 .cmd = MACSEC_CMD_DEL_RXSC,
2650 .doit = macsec_del_rxsc,
2651 .policy = macsec_genl_policy,
2652 .flags = GENL_ADMIN_PERM,
2655 .cmd = MACSEC_CMD_UPD_RXSC,
2656 .doit = macsec_upd_rxsc,
2657 .policy = macsec_genl_policy,
2658 .flags = GENL_ADMIN_PERM,
2661 .cmd = MACSEC_CMD_ADD_TXSA,
2662 .doit = macsec_add_txsa,
2663 .policy = macsec_genl_policy,
2664 .flags = GENL_ADMIN_PERM,
2667 .cmd = MACSEC_CMD_DEL_TXSA,
2668 .doit = macsec_del_txsa,
2669 .policy = macsec_genl_policy,
2670 .flags = GENL_ADMIN_PERM,
2673 .cmd = MACSEC_CMD_UPD_TXSA,
2674 .doit = macsec_upd_txsa,
2675 .policy = macsec_genl_policy,
2676 .flags = GENL_ADMIN_PERM,
2679 .cmd = MACSEC_CMD_ADD_RXSA,
2680 .doit = macsec_add_rxsa,
2681 .policy = macsec_genl_policy,
2682 .flags = GENL_ADMIN_PERM,
2685 .cmd = MACSEC_CMD_DEL_RXSA,
2686 .doit = macsec_del_rxsa,
2687 .policy = macsec_genl_policy,
2688 .flags = GENL_ADMIN_PERM,
2691 .cmd = MACSEC_CMD_UPD_RXSA,
2692 .doit = macsec_upd_rxsa,
2693 .policy = macsec_genl_policy,
2694 .flags = GENL_ADMIN_PERM,
2698 static struct genl_family macsec_fam __ro_after_init = {
2699 .name = MACSEC_GENL_NAME,
2701 .version = MACSEC_GENL_VERSION,
2702 .maxattr = MACSEC_ATTR_MAX,
2704 .module = THIS_MODULE,
2705 .ops = macsec_genl_ops,
2706 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2709 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2710 struct net_device *dev)
2712 struct macsec_dev *macsec = netdev_priv(dev);
2713 struct macsec_secy *secy = &macsec->secy;
2714 struct pcpu_secy_stats *secy_stats;
2718 if (!secy->protect_frames) {
2719 secy_stats = this_cpu_ptr(macsec->stats);
2720 u64_stats_update_begin(&secy_stats->syncp);
2721 secy_stats->stats.OutPktsUntagged++;
2722 u64_stats_update_end(&secy_stats->syncp);
2723 skb->dev = macsec->real_dev;
2725 ret = dev_queue_xmit(skb);
2726 count_tx(dev, ret, len);
2730 if (!secy->operational) {
2732 dev->stats.tx_dropped++;
2733 return NETDEV_TX_OK;
2736 skb = macsec_encrypt(skb, dev);
2738 if (PTR_ERR(skb) != -EINPROGRESS)
2739 dev->stats.tx_dropped++;
2740 return NETDEV_TX_OK;
2743 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2745 macsec_encrypt_finish(skb, dev);
2747 ret = dev_queue_xmit(skb);
2748 count_tx(dev, ret, len);
2752 #define MACSEC_FEATURES \
2753 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2754 static struct lock_class_key macsec_netdev_addr_lock_key;
2756 static int macsec_dev_init(struct net_device *dev)
2758 struct macsec_dev *macsec = macsec_priv(dev);
2759 struct net_device *real_dev = macsec->real_dev;
2762 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2766 err = gro_cells_init(&macsec->gro_cells, dev);
2768 free_percpu(dev->tstats);
2772 dev->features = real_dev->features & MACSEC_FEATURES;
2773 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2775 dev->needed_headroom = real_dev->needed_headroom +
2776 MACSEC_NEEDED_HEADROOM;
2777 dev->needed_tailroom = real_dev->needed_tailroom +
2778 MACSEC_NEEDED_TAILROOM;
2780 if (is_zero_ether_addr(dev->dev_addr))
2781 eth_hw_addr_inherit(dev, real_dev);
2782 if (is_zero_ether_addr(dev->broadcast))
2783 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2788 static void macsec_dev_uninit(struct net_device *dev)
2790 struct macsec_dev *macsec = macsec_priv(dev);
2792 gro_cells_destroy(&macsec->gro_cells);
2793 free_percpu(dev->tstats);
2796 static netdev_features_t macsec_fix_features(struct net_device *dev,
2797 netdev_features_t features)
2799 struct macsec_dev *macsec = macsec_priv(dev);
2800 struct net_device *real_dev = macsec->real_dev;
2802 features &= (real_dev->features & MACSEC_FEATURES) |
2803 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2804 features |= NETIF_F_LLTX;
2809 static int macsec_dev_open(struct net_device *dev)
2811 struct macsec_dev *macsec = macsec_priv(dev);
2812 struct net_device *real_dev = macsec->real_dev;
2815 err = dev_uc_add(real_dev, dev->dev_addr);
2819 if (dev->flags & IFF_ALLMULTI) {
2820 err = dev_set_allmulti(real_dev, 1);
2825 if (dev->flags & IFF_PROMISC) {
2826 err = dev_set_promiscuity(real_dev, 1);
2828 goto clear_allmulti;
2831 if (netif_carrier_ok(real_dev))
2832 netif_carrier_on(dev);
2836 if (dev->flags & IFF_ALLMULTI)
2837 dev_set_allmulti(real_dev, -1);
2839 dev_uc_del(real_dev, dev->dev_addr);
2840 netif_carrier_off(dev);
2844 static int macsec_dev_stop(struct net_device *dev)
2846 struct macsec_dev *macsec = macsec_priv(dev);
2847 struct net_device *real_dev = macsec->real_dev;
2849 netif_carrier_off(dev);
2851 dev_mc_unsync(real_dev, dev);
2852 dev_uc_unsync(real_dev, dev);
2854 if (dev->flags & IFF_ALLMULTI)
2855 dev_set_allmulti(real_dev, -1);
2857 if (dev->flags & IFF_PROMISC)
2858 dev_set_promiscuity(real_dev, -1);
2860 dev_uc_del(real_dev, dev->dev_addr);
2865 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2867 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2869 if (!(dev->flags & IFF_UP))
2872 if (change & IFF_ALLMULTI)
2873 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2875 if (change & IFF_PROMISC)
2876 dev_set_promiscuity(real_dev,
2877 dev->flags & IFF_PROMISC ? 1 : -1);
2880 static void macsec_dev_set_rx_mode(struct net_device *dev)
2882 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2884 dev_mc_sync(real_dev, dev);
2885 dev_uc_sync(real_dev, dev);
2888 static int macsec_set_mac_address(struct net_device *dev, void *p)
2890 struct macsec_dev *macsec = macsec_priv(dev);
2891 struct net_device *real_dev = macsec->real_dev;
2892 struct sockaddr *addr = p;
2895 if (!is_valid_ether_addr(addr->sa_data))
2896 return -EADDRNOTAVAIL;
2898 if (!(dev->flags & IFF_UP))
2901 err = dev_uc_add(real_dev, addr->sa_data);
2905 dev_uc_del(real_dev, dev->dev_addr);
2908 ether_addr_copy(dev->dev_addr, addr->sa_data);
2912 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2914 struct macsec_dev *macsec = macsec_priv(dev);
2915 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2917 if (macsec->real_dev->mtu - extra < new_mtu)
2925 static void macsec_get_stats64(struct net_device *dev,
2926 struct rtnl_link_stats64 *s)
2933 for_each_possible_cpu(cpu) {
2934 struct pcpu_sw_netstats *stats;
2935 struct pcpu_sw_netstats tmp;
2938 stats = per_cpu_ptr(dev->tstats, cpu);
2940 start = u64_stats_fetch_begin_irq(&stats->syncp);
2941 tmp.rx_packets = stats->rx_packets;
2942 tmp.rx_bytes = stats->rx_bytes;
2943 tmp.tx_packets = stats->tx_packets;
2944 tmp.tx_bytes = stats->tx_bytes;
2945 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2947 s->rx_packets += tmp.rx_packets;
2948 s->rx_bytes += tmp.rx_bytes;
2949 s->tx_packets += tmp.tx_packets;
2950 s->tx_bytes += tmp.tx_bytes;
2953 s->rx_dropped = dev->stats.rx_dropped;
2954 s->tx_dropped = dev->stats.tx_dropped;
2957 static int macsec_get_iflink(const struct net_device *dev)
2959 return macsec_priv(dev)->real_dev->ifindex;
2962 static int macsec_get_nest_level(struct net_device *dev)
2964 return macsec_priv(dev)->nest_level;
2967 static const struct net_device_ops macsec_netdev_ops = {
2968 .ndo_init = macsec_dev_init,
2969 .ndo_uninit = macsec_dev_uninit,
2970 .ndo_open = macsec_dev_open,
2971 .ndo_stop = macsec_dev_stop,
2972 .ndo_fix_features = macsec_fix_features,
2973 .ndo_change_mtu = macsec_change_mtu,
2974 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2975 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2976 .ndo_set_mac_address = macsec_set_mac_address,
2977 .ndo_start_xmit = macsec_start_xmit,
2978 .ndo_get_stats64 = macsec_get_stats64,
2979 .ndo_get_iflink = macsec_get_iflink,
2980 .ndo_get_lock_subclass = macsec_get_nest_level,
2983 static const struct device_type macsec_type = {
2987 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2988 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2989 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2990 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2991 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2992 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2993 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2994 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2995 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2996 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2997 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2998 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2999 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3002 static void macsec_free_netdev(struct net_device *dev)
3004 struct macsec_dev *macsec = macsec_priv(dev);
3005 struct net_device *real_dev = macsec->real_dev;
3007 free_percpu(macsec->stats);
3008 free_percpu(macsec->secy.tx_sc.stats);
3013 static void macsec_setup(struct net_device *dev)
3017 dev->max_mtu = ETH_MAX_MTU;
3018 dev->priv_flags |= IFF_NO_QUEUE;
3019 dev->netdev_ops = &macsec_netdev_ops;
3020 dev->needs_free_netdev = true;
3021 dev->priv_destructor = macsec_free_netdev;
3022 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3024 eth_zero_addr(dev->broadcast);
3027 static int macsec_changelink_common(struct net_device *dev,
3028 struct nlattr *data[])
3030 struct macsec_secy *secy;
3031 struct macsec_tx_sc *tx_sc;
3033 secy = &macsec_priv(dev)->secy;
3034 tx_sc = &secy->tx_sc;
3036 if (data[IFLA_MACSEC_ENCODING_SA]) {
3037 struct macsec_tx_sa *tx_sa;
3039 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3040 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3042 secy->operational = tx_sa && tx_sa->active;
3045 if (data[IFLA_MACSEC_WINDOW])
3046 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3048 if (data[IFLA_MACSEC_ENCRYPT])
3049 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3051 if (data[IFLA_MACSEC_PROTECT])
3052 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3054 if (data[IFLA_MACSEC_INC_SCI])
3055 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3057 if (data[IFLA_MACSEC_ES])
3058 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3060 if (data[IFLA_MACSEC_SCB])
3061 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3063 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3064 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3066 if (data[IFLA_MACSEC_VALIDATION])
3067 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3069 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3070 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3071 case MACSEC_CIPHER_ID_GCM_AES_128:
3072 case MACSEC_DEFAULT_CIPHER_ID:
3073 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3075 case MACSEC_CIPHER_ID_GCM_AES_256:
3076 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3086 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3087 struct nlattr *data[],
3088 struct netlink_ext_ack *extack)
3093 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3094 data[IFLA_MACSEC_ICV_LEN] ||
3095 data[IFLA_MACSEC_SCI] ||
3096 data[IFLA_MACSEC_PORT])
3099 return macsec_changelink_common(dev, data);
3102 static void macsec_del_dev(struct macsec_dev *macsec)
3106 while (macsec->secy.rx_sc) {
3107 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3109 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3113 for (i = 0; i < MACSEC_NUM_AN; i++) {
3114 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3117 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3123 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3125 struct macsec_dev *macsec = macsec_priv(dev);
3126 struct net_device *real_dev = macsec->real_dev;
3128 unregister_netdevice_queue(dev, head);
3129 list_del_rcu(&macsec->secys);
3130 macsec_del_dev(macsec);
3131 netdev_upper_dev_unlink(real_dev, dev);
3133 macsec_generation++;
3136 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3138 struct macsec_dev *macsec = macsec_priv(dev);
3139 struct net_device *real_dev = macsec->real_dev;
3140 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3142 macsec_common_dellink(dev, head);
3144 if (list_empty(&rxd->secys)) {
3145 netdev_rx_handler_unregister(real_dev);
3150 static int register_macsec_dev(struct net_device *real_dev,
3151 struct net_device *dev)
3153 struct macsec_dev *macsec = macsec_priv(dev);
3154 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3159 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3163 INIT_LIST_HEAD(&rxd->secys);
3165 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3173 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3177 static bool sci_exists(struct net_device *dev, sci_t sci)
3179 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3180 struct macsec_dev *macsec;
3182 list_for_each_entry(macsec, &rxd->secys, secys) {
3183 if (macsec->secy.sci == sci)
3190 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3192 return make_sci(dev->dev_addr, port);
3195 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3197 struct macsec_dev *macsec = macsec_priv(dev);
3198 struct macsec_secy *secy = &macsec->secy;
3200 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3204 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3205 if (!secy->tx_sc.stats) {
3206 free_percpu(macsec->stats);
3210 if (sci == MACSEC_UNDEF_SCI)
3211 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3214 secy->operational = true;
3215 secy->key_len = DEFAULT_SAK_LEN;
3216 secy->icv_len = icv_len;
3217 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3218 secy->protect_frames = true;
3219 secy->replay_protect = false;
3222 secy->tx_sc.active = true;
3223 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3224 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3225 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3226 secy->tx_sc.end_station = false;
3227 secy->tx_sc.scb = false;
3232 static int macsec_newlink(struct net *net, struct net_device *dev,
3233 struct nlattr *tb[], struct nlattr *data[],
3234 struct netlink_ext_ack *extack)
3236 struct macsec_dev *macsec = macsec_priv(dev);
3237 struct net_device *real_dev;
3240 u8 icv_len = DEFAULT_ICV_LEN;
3241 rx_handler_func_t *rx_handler;
3245 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3249 dev->priv_flags |= IFF_MACSEC;
3251 macsec->real_dev = real_dev;
3253 if (data && data[IFLA_MACSEC_ICV_LEN])
3254 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3255 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3257 rx_handler = rtnl_dereference(real_dev->rx_handler);
3258 if (rx_handler && rx_handler != macsec_handle_frame)
3261 err = register_netdevice(dev);
3267 macsec->nest_level = dev_get_nest_level(real_dev) + 1;
3268 netdev_lockdep_set_classes(dev);
3269 lockdep_set_class_and_subclass(&dev->addr_list_lock,
3270 &macsec_netdev_addr_lock_key,
3271 macsec_get_nest_level(dev));
3273 err = netdev_upper_dev_link(real_dev, dev, extack);
3277 /* need to be already registered so that ->init has run and
3278 * the MAC addr is set
3280 if (data && data[IFLA_MACSEC_SCI])
3281 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3282 else if (data && data[IFLA_MACSEC_PORT])
3283 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3285 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3287 if (rx_handler && sci_exists(real_dev, sci)) {
3292 err = macsec_add_dev(dev, sci, icv_len);
3297 err = macsec_changelink_common(dev, data);
3302 err = register_macsec_dev(real_dev, dev);
3306 netif_stacked_transfer_operstate(real_dev, dev);
3307 linkwatch_fire_event(dev);
3309 macsec_generation++;
3314 macsec_del_dev(macsec);
3316 netdev_upper_dev_unlink(real_dev, dev);
3318 unregister_netdevice(dev);
3322 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
3323 struct netlink_ext_ack *extack)
3325 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3326 u8 icv_len = DEFAULT_ICV_LEN;
3333 if (data[IFLA_MACSEC_CIPHER_SUITE])
3334 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3336 if (data[IFLA_MACSEC_ICV_LEN]) {
3337 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3338 if (icv_len != DEFAULT_ICV_LEN) {
3339 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3340 struct crypto_aead *dummy_tfm;
3342 dummy_tfm = macsec_alloc_tfm(dummy_key,
3345 if (IS_ERR(dummy_tfm))
3346 return PTR_ERR(dummy_tfm);
3347 crypto_free_aead(dummy_tfm);
3352 case MACSEC_CIPHER_ID_GCM_AES_128:
3353 case MACSEC_CIPHER_ID_GCM_AES_256:
3354 case MACSEC_DEFAULT_CIPHER_ID:
3355 if (icv_len < MACSEC_MIN_ICV_LEN ||
3356 icv_len > MACSEC_STD_ICV_LEN)
3363 if (data[IFLA_MACSEC_ENCODING_SA]) {
3364 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3368 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3369 flag < IFLA_MACSEC_VALIDATION;
3372 if (nla_get_u8(data[flag]) > 1)
3377 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3378 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3379 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3381 if ((sci && (scb || es)) || (scb && es))
3384 if (data[IFLA_MACSEC_VALIDATION] &&
3385 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3388 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3389 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3390 !data[IFLA_MACSEC_WINDOW])
3396 static struct net *macsec_get_link_net(const struct net_device *dev)
3398 return dev_net(macsec_priv(dev)->real_dev);
3401 static size_t macsec_get_size(const struct net_device *dev)
3403 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3404 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3405 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3406 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3407 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3408 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3409 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3410 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3411 nla_total_size(1) + /* IFLA_MACSEC_ES */
3412 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3413 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3414 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
3418 static int macsec_fill_info(struct sk_buff *skb,
3419 const struct net_device *dev)
3421 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3422 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3425 switch (secy->key_len) {
3426 case MACSEC_GCM_AES_128_SAK_LEN:
3427 csid = MACSEC_DEFAULT_CIPHER_ID;
3429 case MACSEC_GCM_AES_256_SAK_LEN:
3430 csid = MACSEC_CIPHER_ID_GCM_AES_256;
3433 goto nla_put_failure;
3436 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3438 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3439 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3440 csid, IFLA_MACSEC_PAD) ||
3441 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3442 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3443 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3444 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3445 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3446 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3447 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3448 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3450 goto nla_put_failure;
3452 if (secy->replay_protect) {
3453 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3454 goto nla_put_failure;
3463 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3465 .priv_size = sizeof(struct macsec_dev),
3466 .maxtype = IFLA_MACSEC_MAX,
3467 .policy = macsec_rtnl_policy,
3468 .setup = macsec_setup,
3469 .validate = macsec_validate_attr,
3470 .newlink = macsec_newlink,
3471 .changelink = macsec_changelink,
3472 .dellink = macsec_dellink,
3473 .get_size = macsec_get_size,
3474 .fill_info = macsec_fill_info,
3475 .get_link_net = macsec_get_link_net,
3478 static bool is_macsec_master(struct net_device *dev)
3480 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3483 static int macsec_notify(struct notifier_block *this, unsigned long event,
3486 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3489 if (!is_macsec_master(real_dev))
3495 case NETDEV_CHANGE: {
3496 struct macsec_dev *m, *n;
3497 struct macsec_rxh_data *rxd;
3499 rxd = macsec_data_rtnl(real_dev);
3500 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3501 struct net_device *dev = m->secy.netdev;
3503 netif_stacked_transfer_operstate(real_dev, dev);
3507 case NETDEV_UNREGISTER: {
3508 struct macsec_dev *m, *n;
3509 struct macsec_rxh_data *rxd;
3511 rxd = macsec_data_rtnl(real_dev);
3512 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3513 macsec_common_dellink(m->secy.netdev, &head);
3516 netdev_rx_handler_unregister(real_dev);
3519 unregister_netdevice_many(&head);
3522 case NETDEV_CHANGEMTU: {
3523 struct macsec_dev *m;
3524 struct macsec_rxh_data *rxd;
3526 rxd = macsec_data_rtnl(real_dev);
3527 list_for_each_entry(m, &rxd->secys, secys) {
3528 struct net_device *dev = m->secy.netdev;
3529 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3530 macsec_extra_len(true));
3533 dev_set_mtu(dev, mtu);
3541 static struct notifier_block macsec_notifier = {
3542 .notifier_call = macsec_notify,
3545 static int __init macsec_init(void)
3549 pr_info("MACsec IEEE 802.1AE\n");
3550 err = register_netdevice_notifier(&macsec_notifier);
3554 err = rtnl_link_register(&macsec_link_ops);
3558 err = genl_register_family(&macsec_fam);
3565 rtnl_link_unregister(&macsec_link_ops);
3567 unregister_netdevice_notifier(&macsec_notifier);
3571 static void __exit macsec_exit(void)
3573 genl_unregister_family(&macsec_fam);
3574 rtnl_link_unregister(&macsec_link_ops);
3575 unregister_netdevice_notifier(&macsec_notifier);
3579 module_init(macsec_init);
3580 module_exit(macsec_exit);
3582 MODULE_ALIAS_RTNL_LINK("macsec");
3583 MODULE_ALIAS_GENL_FAMILY("macsec");
3585 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3586 MODULE_LICENSE("GPL v2");