1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drivers/net/macsec.c - MACsec device
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
8 #include <linux/types.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/module.h>
12 #include <crypto/aead.h>
13 #include <linux/etherdevice.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/refcount.h>
16 #include <net/genetlink.h>
18 #include <net/gro_cells.h>
19 #include <linux/if_arp.h>
21 #include <uapi/linux/if_macsec.h>
23 typedef u64 __bitwise sci_t;
25 #define MACSEC_SCI_LEN 8
27 /* SecTAG length = macsec_eth_header without the optional SCI */
28 #define MACSEC_TAG_LEN 6
30 struct macsec_eth_header {
34 #if defined(__LITTLE_ENDIAN_BITFIELD)
37 #elif defined(__BIG_ENDIAN_BITFIELD)
41 #error "Please fix <asm/byteorder.h>"
44 u8 secure_channel_id[8]; /* optional */
47 #define MACSEC_TCI_VERSION 0x80
48 #define MACSEC_TCI_ES 0x40 /* end station */
49 #define MACSEC_TCI_SC 0x20 /* SCI present */
50 #define MACSEC_TCI_SCB 0x10 /* epon */
51 #define MACSEC_TCI_E 0x08 /* encryption */
52 #define MACSEC_TCI_C 0x04 /* changed text */
53 #define MACSEC_AN_MASK 0x03 /* association number */
54 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
56 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
57 #define MIN_NON_SHORT_LEN 48
59 #define GCM_AES_IV_LEN 12
60 #define DEFAULT_ICV_LEN 16
62 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
64 #define for_each_rxsc(secy, sc) \
65 for (sc = rcu_dereference_bh(secy->rx_sc); \
67 sc = rcu_dereference_bh(sc->next))
68 #define for_each_rxsc_rtnl(secy, sc) \
69 for (sc = rtnl_dereference(secy->rx_sc); \
71 sc = rtnl_dereference(sc->next))
75 u8 secure_channel_id[8];
82 * struct macsec_key - SA key
83 * @id: user-provided key identifier
84 * @tfm: crypto struct, key storage
87 u8 id[MACSEC_KEYID_LEN];
88 struct crypto_aead *tfm;
91 struct macsec_rx_sc_stats {
92 __u64 InOctetsValidated;
93 __u64 InOctetsDecrypted;
94 __u64 InPktsUnchecked;
100 __u64 InPktsNotUsingSA;
101 __u64 InPktsUnusedSA;
104 struct macsec_rx_sa_stats {
107 __u32 InPktsNotValid;
108 __u32 InPktsNotUsingSA;
109 __u32 InPktsUnusedSA;
112 struct macsec_tx_sa_stats {
113 __u32 OutPktsProtected;
114 __u32 OutPktsEncrypted;
117 struct macsec_tx_sc_stats {
118 __u64 OutPktsProtected;
119 __u64 OutPktsEncrypted;
120 __u64 OutOctetsProtected;
121 __u64 OutOctetsEncrypted;
124 struct macsec_dev_stats {
125 __u64 OutPktsUntagged;
126 __u64 InPktsUntagged;
127 __u64 OutPktsTooLong;
130 __u64 InPktsUnknownSCI;
136 * struct macsec_rx_sa - receive secure association
138 * @next_pn: packet number expected for the next packet
139 * @lock: protects next_pn manipulations
140 * @key: key structure
141 * @stats: per-SA stats
143 struct macsec_rx_sa {
144 struct macsec_key key;
149 struct macsec_rx_sa_stats __percpu *stats;
150 struct macsec_rx_sc *sc;
154 struct pcpu_rx_sc_stats {
155 struct macsec_rx_sc_stats stats;
156 struct u64_stats_sync syncp;
160 * struct macsec_rx_sc - receive secure channel
161 * @sci: secure channel identifier for this SC
162 * @active: channel is active
163 * @sa: array of secure associations
164 * @stats: per-SC stats
166 struct macsec_rx_sc {
167 struct macsec_rx_sc __rcu *next;
170 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
171 struct pcpu_rx_sc_stats __percpu *stats;
173 struct rcu_head rcu_head;
177 * struct macsec_tx_sa - transmit secure association
179 * @next_pn: packet number to use for the next packet
180 * @lock: protects next_pn manipulations
181 * @key: key structure
182 * @stats: per-SA stats
184 struct macsec_tx_sa {
185 struct macsec_key key;
190 struct macsec_tx_sa_stats __percpu *stats;
194 struct pcpu_tx_sc_stats {
195 struct macsec_tx_sc_stats stats;
196 struct u64_stats_sync syncp;
200 * struct macsec_tx_sc - transmit secure channel
202 * @encoding_sa: association number of the SA currently in use
203 * @encrypt: encrypt packets on transmit, or authenticate only
204 * @send_sci: always include the SCI in the SecTAG
206 * @scb: single copy broadcast flag
207 * @sa: array of secure associations
208 * @stats: stats for this TXSC
210 struct macsec_tx_sc {
217 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
218 struct pcpu_tx_sc_stats __percpu *stats;
221 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
224 * struct macsec_secy - MACsec Security Entity
225 * @netdev: netdevice for this SecY
226 * @n_rx_sc: number of receive secure channels configured on this SecY
227 * @sci: secure channel identifier used for tx
228 * @key_len: length of keys used by the cipher suite
229 * @icv_len: length of ICV used by the cipher suite
230 * @validate_frames: validation mode
231 * @operational: MAC_Operational flag
232 * @protect_frames: enable protection for this SecY
233 * @replay_protect: enable packet number checks on receive
234 * @replay_window: size of the replay window
235 * @tx_sc: transmit secure channel
236 * @rx_sc: linked list of receive secure channels
239 struct net_device *netdev;
240 unsigned int n_rx_sc;
244 enum macsec_validation_type validate_frames;
249 struct macsec_tx_sc tx_sc;
250 struct macsec_rx_sc __rcu *rx_sc;
253 struct pcpu_secy_stats {
254 struct macsec_dev_stats stats;
255 struct u64_stats_sync syncp;
259 * struct macsec_dev - private data
261 * @real_dev: pointer to underlying netdevice
262 * @stats: MACsec device stats
263 * @secys: linked list of SecY's on the underlying device
266 struct macsec_secy secy;
267 struct net_device *real_dev;
268 struct pcpu_secy_stats __percpu *stats;
269 struct list_head secys;
270 struct gro_cells gro_cells;
274 * struct macsec_rxh_data - rx_handler private argument
275 * @secys: linked list of SecY's on this underlying device
277 struct macsec_rxh_data {
278 struct list_head secys;
281 static struct macsec_dev *macsec_priv(const struct net_device *dev)
283 return (struct macsec_dev *)netdev_priv(dev);
286 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
288 return rcu_dereference_bh(dev->rx_handler_data);
291 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
293 return rtnl_dereference(dev->rx_handler_data);
297 struct aead_request *req;
299 struct macsec_tx_sa *tx_sa;
300 struct macsec_rx_sa *rx_sa;
307 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
309 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
311 if (!sa || !sa->active)
314 if (!refcount_inc_not_zero(&sa->refcnt))
320 static void free_rx_sc_rcu(struct rcu_head *head)
322 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
324 free_percpu(rx_sc->stats);
328 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
330 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
333 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
335 if (refcount_dec_and_test(&sc->refcnt))
336 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
339 static void free_rxsa(struct rcu_head *head)
341 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
343 crypto_free_aead(sa->key.tfm);
344 free_percpu(sa->stats);
348 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
350 if (refcount_dec_and_test(&sa->refcnt))
351 call_rcu(&sa->rcu, free_rxsa);
354 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
356 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
358 if (!sa || !sa->active)
361 if (!refcount_inc_not_zero(&sa->refcnt))
367 static void free_txsa(struct rcu_head *head)
369 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
371 crypto_free_aead(sa->key.tfm);
372 free_percpu(sa->stats);
376 static void macsec_txsa_put(struct macsec_tx_sa *sa)
378 if (refcount_dec_and_test(&sa->refcnt))
379 call_rcu(&sa->rcu, free_txsa);
382 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
384 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
385 return (struct macsec_cb *)skb->cb;
388 #define MACSEC_PORT_ES (htons(0x0001))
389 #define MACSEC_PORT_SCB (0x0000)
390 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
392 #define MACSEC_GCM_AES_128_SAK_LEN 16
393 #define MACSEC_GCM_AES_256_SAK_LEN 32
395 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
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);
594 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
596 struct sk_buff *skb = base->data;
597 struct net_device *dev = skb->dev;
598 struct macsec_dev *macsec = macsec_priv(dev);
599 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
602 aead_request_free(macsec_skb_cb(skb)->req);
605 macsec_encrypt_finish(skb, dev);
606 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
608 ret = dev_queue_xmit(skb);
609 count_tx(dev, ret, len);
610 rcu_read_unlock_bh();
616 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
618 struct scatterlist **sg,
621 size_t size, iv_offset, sg_offset;
622 struct aead_request *req;
625 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
627 size += GCM_AES_IV_LEN;
629 size = ALIGN(size, __alignof__(struct scatterlist));
631 size += sizeof(struct scatterlist) * num_frags;
633 tmp = kmalloc(size, GFP_ATOMIC);
637 *iv = (unsigned char *)(tmp + iv_offset);
638 *sg = (struct scatterlist *)(tmp + sg_offset);
641 aead_request_set_tfm(req, tfm);
646 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
647 struct net_device *dev)
650 struct scatterlist *sg;
651 struct sk_buff *trailer;
654 struct macsec_eth_header *hh;
655 size_t unprotected_len;
656 struct aead_request *req;
657 struct macsec_secy *secy;
658 struct macsec_tx_sc *tx_sc;
659 struct macsec_tx_sa *tx_sa;
660 struct macsec_dev *macsec = macsec_priv(dev);
664 secy = &macsec->secy;
665 tx_sc = &secy->tx_sc;
667 /* 10.5.1 TX SA assignment */
668 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
670 secy->operational = false;
672 return ERR_PTR(-EINVAL);
675 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
676 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
677 struct sk_buff *nskb = skb_copy_expand(skb,
678 MACSEC_NEEDED_HEADROOM,
679 MACSEC_NEEDED_TAILROOM,
685 macsec_txsa_put(tx_sa);
687 return ERR_PTR(-ENOMEM);
690 skb = skb_unshare(skb, GFP_ATOMIC);
692 macsec_txsa_put(tx_sa);
693 return ERR_PTR(-ENOMEM);
697 unprotected_len = skb->len;
699 sci_present = send_sci(secy);
700 hh = skb_push(skb, macsec_extra_len(sci_present));
701 memmove(hh, eth, 2 * ETH_ALEN);
703 pn = tx_sa_update_pn(tx_sa, secy);
705 macsec_txsa_put(tx_sa);
707 return ERR_PTR(-ENOLINK);
709 macsec_fill_sectag(hh, secy, pn, sci_present);
710 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
712 skb_put(skb, secy->icv_len);
714 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
715 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
717 u64_stats_update_begin(&secy_stats->syncp);
718 secy_stats->stats.OutPktsTooLong++;
719 u64_stats_update_end(&secy_stats->syncp);
721 macsec_txsa_put(tx_sa);
723 return ERR_PTR(-EINVAL);
726 ret = skb_cow_data(skb, 0, &trailer);
727 if (unlikely(ret < 0)) {
728 macsec_txsa_put(tx_sa);
733 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
735 macsec_txsa_put(tx_sa);
737 return ERR_PTR(-ENOMEM);
740 macsec_fill_iv(iv, secy->sci, pn);
742 sg_init_table(sg, ret);
743 ret = skb_to_sgvec(skb, sg, 0, skb->len);
744 if (unlikely(ret < 0)) {
745 aead_request_free(req);
746 macsec_txsa_put(tx_sa);
751 if (tx_sc->encrypt) {
752 int len = skb->len - macsec_hdr_len(sci_present) -
754 aead_request_set_crypt(req, sg, sg, len, iv);
755 aead_request_set_ad(req, macsec_hdr_len(sci_present));
757 aead_request_set_crypt(req, sg, sg, 0, iv);
758 aead_request_set_ad(req, skb->len - secy->icv_len);
761 macsec_skb_cb(skb)->req = req;
762 macsec_skb_cb(skb)->tx_sa = tx_sa;
763 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
766 ret = crypto_aead_encrypt(req);
767 if (ret == -EINPROGRESS) {
769 } else if (ret != 0) {
772 aead_request_free(req);
773 macsec_txsa_put(tx_sa);
774 return ERR_PTR(-EINVAL);
778 aead_request_free(req);
779 macsec_txsa_put(tx_sa);
784 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
786 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
787 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
788 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
791 spin_lock(&rx_sa->lock);
792 if (rx_sa->next_pn >= secy->replay_window)
793 lowest_pn = rx_sa->next_pn - secy->replay_window;
795 /* Now perform replay protection check again
796 * (see IEEE 802.1AE-2006 figure 10-5)
798 if (secy->replay_protect && pn < lowest_pn) {
799 spin_unlock(&rx_sa->lock);
800 u64_stats_update_begin(&rxsc_stats->syncp);
801 rxsc_stats->stats.InPktsLate++;
802 u64_stats_update_end(&rxsc_stats->syncp);
806 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
807 u64_stats_update_begin(&rxsc_stats->syncp);
808 if (hdr->tci_an & MACSEC_TCI_E)
809 rxsc_stats->stats.InOctetsDecrypted += skb->len;
811 rxsc_stats->stats.InOctetsValidated += skb->len;
812 u64_stats_update_end(&rxsc_stats->syncp);
815 if (!macsec_skb_cb(skb)->valid) {
816 spin_unlock(&rx_sa->lock);
819 if (hdr->tci_an & MACSEC_TCI_C ||
820 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
821 u64_stats_update_begin(&rxsc_stats->syncp);
822 rxsc_stats->stats.InPktsNotValid++;
823 u64_stats_update_end(&rxsc_stats->syncp);
827 u64_stats_update_begin(&rxsc_stats->syncp);
828 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
829 rxsc_stats->stats.InPktsInvalid++;
830 this_cpu_inc(rx_sa->stats->InPktsInvalid);
831 } else if (pn < lowest_pn) {
832 rxsc_stats->stats.InPktsDelayed++;
834 rxsc_stats->stats.InPktsUnchecked++;
836 u64_stats_update_end(&rxsc_stats->syncp);
838 u64_stats_update_begin(&rxsc_stats->syncp);
839 if (pn < lowest_pn) {
840 rxsc_stats->stats.InPktsDelayed++;
842 rxsc_stats->stats.InPktsOK++;
843 this_cpu_inc(rx_sa->stats->InPktsOK);
845 u64_stats_update_end(&rxsc_stats->syncp);
847 if (pn >= rx_sa->next_pn)
848 rx_sa->next_pn = pn + 1;
849 spin_unlock(&rx_sa->lock);
855 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
857 skb->pkt_type = PACKET_HOST;
858 skb->protocol = eth_type_trans(skb, dev);
860 skb_reset_network_header(skb);
861 if (!skb_transport_header_was_set(skb))
862 skb_reset_transport_header(skb);
863 skb_reset_mac_len(skb);
866 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
868 skb->ip_summed = CHECKSUM_NONE;
869 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
870 skb_pull(skb, hdr_len);
871 pskb_trim_unique(skb, skb->len - icv_len);
874 static void count_rx(struct net_device *dev, int len)
876 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
878 u64_stats_update_begin(&stats->syncp);
880 stats->rx_bytes += len;
881 u64_stats_update_end(&stats->syncp);
884 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
886 struct sk_buff *skb = base->data;
887 struct net_device *dev = skb->dev;
888 struct macsec_dev *macsec = macsec_priv(dev);
889 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
890 struct macsec_rx_sc *rx_sc = rx_sa->sc;
894 aead_request_free(macsec_skb_cb(skb)->req);
897 macsec_skb_cb(skb)->valid = true;
900 pn = ntohl(macsec_ethhdr(skb)->packet_number);
901 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
902 rcu_read_unlock_bh();
907 macsec_finalize_skb(skb, macsec->secy.icv_len,
908 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
909 macsec_reset_skb(skb, macsec->secy.netdev);
912 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
915 rcu_read_unlock_bh();
918 macsec_rxsa_put(rx_sa);
919 macsec_rxsc_put(rx_sc);
923 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
924 struct net_device *dev,
925 struct macsec_rx_sa *rx_sa,
927 struct macsec_secy *secy)
930 struct scatterlist *sg;
931 struct sk_buff *trailer;
933 struct aead_request *req;
934 struct macsec_eth_header *hdr;
935 u16 icv_len = secy->icv_len;
937 macsec_skb_cb(skb)->valid = false;
938 skb = skb_share_check(skb, GFP_ATOMIC);
940 return ERR_PTR(-ENOMEM);
942 ret = skb_cow_data(skb, 0, &trailer);
943 if (unlikely(ret < 0)) {
947 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
950 return ERR_PTR(-ENOMEM);
953 hdr = (struct macsec_eth_header *)skb->data;
954 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
956 sg_init_table(sg, ret);
957 ret = skb_to_sgvec(skb, sg, 0, skb->len);
958 if (unlikely(ret < 0)) {
959 aead_request_free(req);
964 if (hdr->tci_an & MACSEC_TCI_E) {
965 /* confidentiality: ethernet + macsec header
966 * authenticated, encrypted payload
968 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
970 aead_request_set_crypt(req, sg, sg, len, iv);
971 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
972 skb = skb_unshare(skb, GFP_ATOMIC);
974 aead_request_free(req);
975 return ERR_PTR(-ENOMEM);
978 /* integrity only: all headers + data authenticated */
979 aead_request_set_crypt(req, sg, sg, icv_len, iv);
980 aead_request_set_ad(req, skb->len - icv_len);
983 macsec_skb_cb(skb)->req = req;
985 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
988 ret = crypto_aead_decrypt(req);
989 if (ret == -EINPROGRESS) {
991 } else if (ret != 0) {
992 /* decryption/authentication failed
993 * 10.6 if validateFrames is disabled, deliver anyway
995 if (ret != -EBADMSG) {
1000 macsec_skb_cb(skb)->valid = true;
1004 aead_request_free(req);
1009 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
1011 struct macsec_rx_sc *rx_sc;
1013 for_each_rxsc(secy, rx_sc) {
1014 if (rx_sc->sci == sci)
1021 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
1023 struct macsec_rx_sc *rx_sc;
1025 for_each_rxsc_rtnl(secy, rx_sc) {
1026 if (rx_sc->sci == sci)
1033 static void handle_not_macsec(struct sk_buff *skb)
1035 struct macsec_rxh_data *rxd;
1036 struct macsec_dev *macsec;
1039 rxd = macsec_data_rcu(skb->dev);
1041 /* 10.6 If the management control validateFrames is not
1042 * Strict, frames without a SecTAG are received, counted, and
1043 * delivered to the Controlled Port
1045 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1046 struct sk_buff *nskb;
1047 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1049 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1050 u64_stats_update_begin(&secy_stats->syncp);
1051 secy_stats->stats.InPktsNoTag++;
1052 u64_stats_update_end(&secy_stats->syncp);
1056 /* deliver on this port */
1057 nskb = skb_clone(skb, GFP_ATOMIC);
1061 nskb->dev = macsec->secy.netdev;
1063 if (netif_rx(nskb) == NET_RX_SUCCESS) {
1064 u64_stats_update_begin(&secy_stats->syncp);
1065 secy_stats->stats.InPktsUntagged++;
1066 u64_stats_update_end(&secy_stats->syncp);
1073 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1075 struct sk_buff *skb = *pskb;
1076 struct net_device *dev = skb->dev;
1077 struct macsec_eth_header *hdr;
1078 struct macsec_secy *secy = NULL;
1079 struct macsec_rx_sc *rx_sc;
1080 struct macsec_rx_sa *rx_sa;
1081 struct macsec_rxh_data *rxd;
1082 struct macsec_dev *macsec;
1087 struct pcpu_rx_sc_stats *rxsc_stats;
1088 struct pcpu_secy_stats *secy_stats;
1092 if (skb_headroom(skb) < ETH_HLEN)
1095 hdr = macsec_ethhdr(skb);
1096 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1097 handle_not_macsec(skb);
1099 /* and deliver to the uncontrolled port */
1100 return RX_HANDLER_PASS;
1103 skb = skb_unshare(skb, GFP_ATOMIC);
1106 return RX_HANDLER_CONSUMED;
1108 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1110 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1114 hdr = macsec_ethhdr(skb);
1116 /* Frames with a SecTAG that has the TCI E bit set but the C
1117 * bit clear are discarded, as this reserved encoding is used
1118 * to identify frames with a SecTAG that are not to be
1119 * delivered to the Controlled Port.
1121 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1122 return RX_HANDLER_PASS;
1124 /* now, pull the extra length */
1125 if (hdr->tci_an & MACSEC_TCI_SC) {
1130 /* ethernet header is part of crypto processing */
1131 skb_push(skb, ETH_HLEN);
1133 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1134 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1135 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1138 rxd = macsec_data_rcu(skb->dev);
1140 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1141 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1143 sc = sc ? macsec_rxsc_get(sc) : NULL;
1146 secy = &macsec->secy;
1156 macsec = macsec_priv(dev);
1157 secy_stats = this_cpu_ptr(macsec->stats);
1158 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1160 if (!macsec_validate_skb(skb, secy->icv_len)) {
1161 u64_stats_update_begin(&secy_stats->syncp);
1162 secy_stats->stats.InPktsBadTag++;
1163 u64_stats_update_end(&secy_stats->syncp);
1167 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1169 /* 10.6.1 if the SA is not in use */
1171 /* If validateFrames is Strict or the C bit in the
1172 * SecTAG is set, discard
1174 if (hdr->tci_an & MACSEC_TCI_C ||
1175 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1176 u64_stats_update_begin(&rxsc_stats->syncp);
1177 rxsc_stats->stats.InPktsNotUsingSA++;
1178 u64_stats_update_end(&rxsc_stats->syncp);
1182 /* not Strict, the frame (with the SecTAG and ICV
1183 * removed) is delivered to the Controlled Port.
1185 u64_stats_update_begin(&rxsc_stats->syncp);
1186 rxsc_stats->stats.InPktsUnusedSA++;
1187 u64_stats_update_end(&rxsc_stats->syncp);
1191 /* First, PN check to avoid decrypting obviously wrong packets */
1192 pn = ntohl(hdr->packet_number);
1193 if (secy->replay_protect) {
1196 spin_lock(&rx_sa->lock);
1197 late = rx_sa->next_pn >= secy->replay_window &&
1198 pn < (rx_sa->next_pn - secy->replay_window);
1199 spin_unlock(&rx_sa->lock);
1202 u64_stats_update_begin(&rxsc_stats->syncp);
1203 rxsc_stats->stats.InPktsLate++;
1204 u64_stats_update_end(&rxsc_stats->syncp);
1209 macsec_skb_cb(skb)->rx_sa = rx_sa;
1211 /* Disabled && !changed text => skip validation */
1212 if (hdr->tci_an & MACSEC_TCI_C ||
1213 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1214 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1217 /* the decrypt callback needs the reference */
1218 if (PTR_ERR(skb) != -EINPROGRESS) {
1219 macsec_rxsa_put(rx_sa);
1220 macsec_rxsc_put(rx_sc);
1224 return RX_HANDLER_CONSUMED;
1227 if (!macsec_post_decrypt(skb, secy, pn))
1231 macsec_finalize_skb(skb, secy->icv_len,
1232 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1233 macsec_reset_skb(skb, secy->netdev);
1236 macsec_rxsa_put(rx_sa);
1237 macsec_rxsc_put(rx_sc);
1241 ret = gro_cells_receive(&macsec->gro_cells, skb);
1242 if (ret == NET_RX_SUCCESS)
1245 macsec->secy.netdev->stats.rx_dropped++;
1250 return RX_HANDLER_CONSUMED;
1253 macsec_rxsa_put(rx_sa);
1255 macsec_rxsc_put(rx_sc);
1260 return RX_HANDLER_CONSUMED;
1263 /* 10.6.1 if the SC is not found */
1264 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1266 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1267 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1269 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1270 struct sk_buff *nskb;
1272 secy_stats = this_cpu_ptr(macsec->stats);
1274 /* If validateFrames is Strict or the C bit in the
1275 * SecTAG is set, discard
1278 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1279 u64_stats_update_begin(&secy_stats->syncp);
1280 secy_stats->stats.InPktsNoSCI++;
1281 u64_stats_update_end(&secy_stats->syncp);
1285 /* not strict, the frame (with the SecTAG and ICV
1286 * removed) is delivered to the Controlled Port.
1288 nskb = skb_clone(skb, GFP_ATOMIC);
1292 macsec_reset_skb(nskb, macsec->secy.netdev);
1294 ret = netif_rx(nskb);
1295 if (ret == NET_RX_SUCCESS) {
1296 u64_stats_update_begin(&secy_stats->syncp);
1297 secy_stats->stats.InPktsUnknownSCI++;
1298 u64_stats_update_end(&secy_stats->syncp);
1300 macsec->secy.netdev->stats.rx_dropped++;
1306 return RX_HANDLER_PASS;
1309 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1311 struct crypto_aead *tfm;
1314 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1315 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
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_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1620 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1622 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1625 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1631 static bool validate_add_rxsa(struct nlattr **attrs)
1633 if (!attrs[MACSEC_SA_ATTR_AN] ||
1634 !attrs[MACSEC_SA_ATTR_KEY] ||
1635 !attrs[MACSEC_SA_ATTR_KEYID])
1638 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1641 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1644 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1645 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1649 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1655 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1657 struct net_device *dev;
1658 struct nlattr **attrs = info->attrs;
1659 struct macsec_secy *secy;
1660 struct macsec_rx_sc *rx_sc;
1661 struct macsec_rx_sa *rx_sa;
1662 unsigned char assoc_num;
1663 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1664 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1667 if (!attrs[MACSEC_ATTR_IFINDEX])
1670 if (parse_sa_config(attrs, tb_sa))
1673 if (parse_rxsc_config(attrs, tb_rxsc))
1676 if (!validate_add_rxsa(tb_sa))
1680 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1681 if (IS_ERR(rx_sc)) {
1683 return PTR_ERR(rx_sc);
1686 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1688 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1689 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1690 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1695 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1701 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1707 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1708 secy->key_len, secy->icv_len);
1715 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1716 spin_lock_bh(&rx_sa->lock);
1717 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1718 spin_unlock_bh(&rx_sa->lock);
1721 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1722 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1724 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1726 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1733 static bool validate_add_rxsc(struct nlattr **attrs)
1735 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1738 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1739 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1746 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1748 struct net_device *dev;
1749 sci_t sci = MACSEC_UNDEF_SCI;
1750 struct nlattr **attrs = info->attrs;
1751 struct macsec_rx_sc *rx_sc;
1752 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1754 if (!attrs[MACSEC_ATTR_IFINDEX])
1757 if (parse_rxsc_config(attrs, tb_rxsc))
1760 if (!validate_add_rxsc(tb_rxsc))
1764 dev = get_dev_from_nl(genl_info_net(info), attrs);
1767 return PTR_ERR(dev);
1770 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1772 rx_sc = create_rx_sc(dev, sci);
1773 if (IS_ERR(rx_sc)) {
1775 return PTR_ERR(rx_sc);
1778 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1779 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1786 static bool validate_add_txsa(struct nlattr **attrs)
1788 if (!attrs[MACSEC_SA_ATTR_AN] ||
1789 !attrs[MACSEC_SA_ATTR_PN] ||
1790 !attrs[MACSEC_SA_ATTR_KEY] ||
1791 !attrs[MACSEC_SA_ATTR_KEYID])
1794 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1797 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1800 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1801 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1805 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1811 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1813 struct net_device *dev;
1814 struct nlattr **attrs = info->attrs;
1815 struct macsec_secy *secy;
1816 struct macsec_tx_sc *tx_sc;
1817 struct macsec_tx_sa *tx_sa;
1818 unsigned char assoc_num;
1819 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1822 if (!attrs[MACSEC_ATTR_IFINDEX])
1825 if (parse_sa_config(attrs, tb_sa))
1828 if (!validate_add_txsa(tb_sa))
1832 dev = get_dev_from_nl(genl_info_net(info), attrs);
1835 return PTR_ERR(dev);
1838 secy = &macsec_priv(dev)->secy;
1839 tx_sc = &secy->tx_sc;
1841 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1843 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1844 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1845 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1850 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1856 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1862 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1863 secy->key_len, secy->icv_len);
1870 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1872 spin_lock_bh(&tx_sa->lock);
1873 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1874 spin_unlock_bh(&tx_sa->lock);
1876 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1877 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1879 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1880 secy->operational = true;
1882 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1889 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1891 struct nlattr **attrs = info->attrs;
1892 struct net_device *dev;
1893 struct macsec_secy *secy;
1894 struct macsec_rx_sc *rx_sc;
1895 struct macsec_rx_sa *rx_sa;
1897 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1898 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1900 if (!attrs[MACSEC_ATTR_IFINDEX])
1903 if (parse_sa_config(attrs, tb_sa))
1906 if (parse_rxsc_config(attrs, tb_rxsc))
1910 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1911 &dev, &secy, &rx_sc, &assoc_num);
1912 if (IS_ERR(rx_sa)) {
1914 return PTR_ERR(rx_sa);
1917 if (rx_sa->active) {
1922 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1930 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1932 struct nlattr **attrs = info->attrs;
1933 struct net_device *dev;
1934 struct macsec_secy *secy;
1935 struct macsec_rx_sc *rx_sc;
1937 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1939 if (!attrs[MACSEC_ATTR_IFINDEX])
1942 if (parse_rxsc_config(attrs, tb_rxsc))
1945 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1949 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1952 return PTR_ERR(dev);
1955 secy = &macsec_priv(dev)->secy;
1956 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1958 rx_sc = del_rx_sc(secy, sci);
1970 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1972 struct nlattr **attrs = info->attrs;
1973 struct net_device *dev;
1974 struct macsec_secy *secy;
1975 struct macsec_tx_sc *tx_sc;
1976 struct macsec_tx_sa *tx_sa;
1978 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1980 if (!attrs[MACSEC_ATTR_IFINDEX])
1983 if (parse_sa_config(attrs, tb_sa))
1987 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1988 &dev, &secy, &tx_sc, &assoc_num);
1989 if (IS_ERR(tx_sa)) {
1991 return PTR_ERR(tx_sa);
1994 if (tx_sa->active) {
1999 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2007 static bool validate_upd_sa(struct nlattr **attrs)
2009 if (!attrs[MACSEC_SA_ATTR_AN] ||
2010 attrs[MACSEC_SA_ATTR_KEY] ||
2011 attrs[MACSEC_SA_ATTR_KEYID])
2014 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2017 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2020 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2021 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2028 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2030 struct nlattr **attrs = info->attrs;
2031 struct net_device *dev;
2032 struct macsec_secy *secy;
2033 struct macsec_tx_sc *tx_sc;
2034 struct macsec_tx_sa *tx_sa;
2036 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2038 if (!attrs[MACSEC_ATTR_IFINDEX])
2041 if (parse_sa_config(attrs, tb_sa))
2044 if (!validate_upd_sa(tb_sa))
2048 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2049 &dev, &secy, &tx_sc, &assoc_num);
2050 if (IS_ERR(tx_sa)) {
2052 return PTR_ERR(tx_sa);
2055 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2056 spin_lock_bh(&tx_sa->lock);
2057 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2058 spin_unlock_bh(&tx_sa->lock);
2061 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2062 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2064 if (assoc_num == tx_sc->encoding_sa)
2065 secy->operational = tx_sa->active;
2072 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2074 struct nlattr **attrs = info->attrs;
2075 struct net_device *dev;
2076 struct macsec_secy *secy;
2077 struct macsec_rx_sc *rx_sc;
2078 struct macsec_rx_sa *rx_sa;
2080 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2081 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2083 if (!attrs[MACSEC_ATTR_IFINDEX])
2086 if (parse_rxsc_config(attrs, tb_rxsc))
2089 if (parse_sa_config(attrs, tb_sa))
2092 if (!validate_upd_sa(tb_sa))
2096 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2097 &dev, &secy, &rx_sc, &assoc_num);
2098 if (IS_ERR(rx_sa)) {
2100 return PTR_ERR(rx_sa);
2103 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2104 spin_lock_bh(&rx_sa->lock);
2105 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2106 spin_unlock_bh(&rx_sa->lock);
2109 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2110 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2116 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2118 struct nlattr **attrs = info->attrs;
2119 struct net_device *dev;
2120 struct macsec_secy *secy;
2121 struct macsec_rx_sc *rx_sc;
2122 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2124 if (!attrs[MACSEC_ATTR_IFINDEX])
2127 if (parse_rxsc_config(attrs, tb_rxsc))
2130 if (!validate_add_rxsc(tb_rxsc))
2134 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2135 if (IS_ERR(rx_sc)) {
2137 return PTR_ERR(rx_sc);
2140 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2141 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2143 if (rx_sc->active != new)
2144 secy->n_rx_sc += new ? 1 : -1;
2146 rx_sc->active = new;
2154 static int copy_tx_sa_stats(struct sk_buff *skb,
2155 struct macsec_tx_sa_stats __percpu *pstats)
2157 struct macsec_tx_sa_stats sum = {0, };
2160 for_each_possible_cpu(cpu) {
2161 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2163 sum.OutPktsProtected += stats->OutPktsProtected;
2164 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2167 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2168 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2174 static noinline_for_stack int
2175 copy_rx_sa_stats(struct sk_buff *skb,
2176 struct macsec_rx_sa_stats __percpu *pstats)
2178 struct macsec_rx_sa_stats sum = {0, };
2181 for_each_possible_cpu(cpu) {
2182 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2184 sum.InPktsOK += stats->InPktsOK;
2185 sum.InPktsInvalid += stats->InPktsInvalid;
2186 sum.InPktsNotValid += stats->InPktsNotValid;
2187 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2188 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2191 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2192 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2193 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2194 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2195 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2201 static noinline_for_stack int
2202 copy_rx_sc_stats(struct sk_buff *skb, struct pcpu_rx_sc_stats __percpu *pstats)
2204 struct macsec_rx_sc_stats sum = {0, };
2207 for_each_possible_cpu(cpu) {
2208 const struct pcpu_rx_sc_stats *stats;
2209 struct macsec_rx_sc_stats tmp;
2212 stats = per_cpu_ptr(pstats, cpu);
2214 start = u64_stats_fetch_begin_irq(&stats->syncp);
2215 memcpy(&tmp, &stats->stats, sizeof(tmp));
2216 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2218 sum.InOctetsValidated += tmp.InOctetsValidated;
2219 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2220 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2221 sum.InPktsDelayed += tmp.InPktsDelayed;
2222 sum.InPktsOK += tmp.InPktsOK;
2223 sum.InPktsInvalid += tmp.InPktsInvalid;
2224 sum.InPktsLate += tmp.InPktsLate;
2225 sum.InPktsNotValid += tmp.InPktsNotValid;
2226 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2227 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2230 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2231 sum.InOctetsValidated,
2232 MACSEC_RXSC_STATS_ATTR_PAD) ||
2233 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2234 sum.InOctetsDecrypted,
2235 MACSEC_RXSC_STATS_ATTR_PAD) ||
2236 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2237 sum.InPktsUnchecked,
2238 MACSEC_RXSC_STATS_ATTR_PAD) ||
2239 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2241 MACSEC_RXSC_STATS_ATTR_PAD) ||
2242 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2244 MACSEC_RXSC_STATS_ATTR_PAD) ||
2245 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2247 MACSEC_RXSC_STATS_ATTR_PAD) ||
2248 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2250 MACSEC_RXSC_STATS_ATTR_PAD) ||
2251 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2253 MACSEC_RXSC_STATS_ATTR_PAD) ||
2254 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2255 sum.InPktsNotUsingSA,
2256 MACSEC_RXSC_STATS_ATTR_PAD) ||
2257 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2259 MACSEC_RXSC_STATS_ATTR_PAD))
2265 static noinline_for_stack int
2266 copy_tx_sc_stats(struct sk_buff *skb, struct pcpu_tx_sc_stats __percpu *pstats)
2268 struct macsec_tx_sc_stats sum = {0, };
2271 for_each_possible_cpu(cpu) {
2272 const struct pcpu_tx_sc_stats *stats;
2273 struct macsec_tx_sc_stats tmp;
2276 stats = per_cpu_ptr(pstats, cpu);
2278 start = u64_stats_fetch_begin_irq(&stats->syncp);
2279 memcpy(&tmp, &stats->stats, sizeof(tmp));
2280 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2282 sum.OutPktsProtected += tmp.OutPktsProtected;
2283 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2284 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2285 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2288 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2289 sum.OutPktsProtected,
2290 MACSEC_TXSC_STATS_ATTR_PAD) ||
2291 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2292 sum.OutPktsEncrypted,
2293 MACSEC_TXSC_STATS_ATTR_PAD) ||
2294 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2295 sum.OutOctetsProtected,
2296 MACSEC_TXSC_STATS_ATTR_PAD) ||
2297 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2298 sum.OutOctetsEncrypted,
2299 MACSEC_TXSC_STATS_ATTR_PAD))
2305 static noinline_for_stack int
2306 copy_secy_stats(struct sk_buff *skb, struct pcpu_secy_stats __percpu *pstats)
2308 struct macsec_dev_stats sum = {0, };
2311 for_each_possible_cpu(cpu) {
2312 const struct pcpu_secy_stats *stats;
2313 struct macsec_dev_stats tmp;
2316 stats = per_cpu_ptr(pstats, cpu);
2318 start = u64_stats_fetch_begin_irq(&stats->syncp);
2319 memcpy(&tmp, &stats->stats, sizeof(tmp));
2320 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2322 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2323 sum.InPktsUntagged += tmp.InPktsUntagged;
2324 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2325 sum.InPktsNoTag += tmp.InPktsNoTag;
2326 sum.InPktsBadTag += tmp.InPktsBadTag;
2327 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2328 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2329 sum.InPktsOverrun += tmp.InPktsOverrun;
2332 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2333 sum.OutPktsUntagged,
2334 MACSEC_SECY_STATS_ATTR_PAD) ||
2335 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2337 MACSEC_SECY_STATS_ATTR_PAD) ||
2338 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2340 MACSEC_SECY_STATS_ATTR_PAD) ||
2341 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2343 MACSEC_SECY_STATS_ATTR_PAD) ||
2344 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2346 MACSEC_SECY_STATS_ATTR_PAD) ||
2347 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2348 sum.InPktsUnknownSCI,
2349 MACSEC_SECY_STATS_ATTR_PAD) ||
2350 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2352 MACSEC_SECY_STATS_ATTR_PAD) ||
2353 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2355 MACSEC_SECY_STATS_ATTR_PAD))
2361 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2363 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2364 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2371 switch (secy->key_len) {
2372 case MACSEC_GCM_AES_128_SAK_LEN:
2373 csid = MACSEC_DEFAULT_CIPHER_ID;
2375 case MACSEC_GCM_AES_256_SAK_LEN:
2376 csid = MACSEC_CIPHER_ID_GCM_AES_256;
2382 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2383 MACSEC_SECY_ATTR_PAD) ||
2384 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2385 csid, MACSEC_SECY_ATTR_PAD) ||
2386 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2387 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2388 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2389 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2390 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2391 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2392 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2393 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2394 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2395 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2398 if (secy->replay_protect) {
2399 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2403 nla_nest_end(skb, secy_nest);
2407 nla_nest_cancel(skb, secy_nest);
2411 static noinline_for_stack int
2412 dump_secy(struct macsec_secy *secy, struct net_device *dev,
2413 struct sk_buff *skb, struct netlink_callback *cb)
2415 struct macsec_rx_sc *rx_sc;
2416 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2417 struct nlattr *txsa_list, *rxsc_list;
2420 struct nlattr *attr;
2422 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2423 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2427 genl_dump_check_consistent(cb, hdr);
2429 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2430 goto nla_put_failure;
2432 if (nla_put_secy(secy, skb))
2433 goto nla_put_failure;
2435 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
2437 goto nla_put_failure;
2438 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2439 nla_nest_cancel(skb, attr);
2440 goto nla_put_failure;
2442 nla_nest_end(skb, attr);
2444 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
2446 goto nla_put_failure;
2447 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2448 nla_nest_cancel(skb, attr);
2449 goto nla_put_failure;
2451 nla_nest_end(skb, attr);
2453 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
2455 goto nla_put_failure;
2456 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2457 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2458 struct nlattr *txsa_nest;
2463 txsa_nest = nla_nest_start_noflag(skb, j++);
2465 nla_nest_cancel(skb, txsa_list);
2466 goto nla_put_failure;
2469 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2470 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2471 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2472 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2473 nla_nest_cancel(skb, txsa_nest);
2474 nla_nest_cancel(skb, txsa_list);
2475 goto nla_put_failure;
2478 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
2480 nla_nest_cancel(skb, txsa_nest);
2481 nla_nest_cancel(skb, txsa_list);
2482 goto nla_put_failure;
2484 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2485 nla_nest_cancel(skb, attr);
2486 nla_nest_cancel(skb, txsa_nest);
2487 nla_nest_cancel(skb, txsa_list);
2488 goto nla_put_failure;
2490 nla_nest_end(skb, attr);
2492 nla_nest_end(skb, txsa_nest);
2494 nla_nest_end(skb, txsa_list);
2496 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
2498 goto nla_put_failure;
2501 for_each_rxsc_rtnl(secy, rx_sc) {
2503 struct nlattr *rxsa_list;
2504 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
2507 nla_nest_cancel(skb, rxsc_list);
2508 goto nla_put_failure;
2511 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2512 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2513 MACSEC_RXSC_ATTR_PAD)) {
2514 nla_nest_cancel(skb, rxsc_nest);
2515 nla_nest_cancel(skb, rxsc_list);
2516 goto nla_put_failure;
2519 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
2521 nla_nest_cancel(skb, rxsc_nest);
2522 nla_nest_cancel(skb, rxsc_list);
2523 goto nla_put_failure;
2525 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2526 nla_nest_cancel(skb, attr);
2527 nla_nest_cancel(skb, rxsc_nest);
2528 nla_nest_cancel(skb, rxsc_list);
2529 goto nla_put_failure;
2531 nla_nest_end(skb, attr);
2533 rxsa_list = nla_nest_start_noflag(skb,
2534 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_noflag(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_noflag(skb,
2557 MACSEC_SA_ATTR_STATS);
2559 nla_nest_cancel(skb, rxsa_list);
2560 nla_nest_cancel(skb, rxsc_nest);
2561 nla_nest_cancel(skb, rxsc_list);
2562 goto nla_put_failure;
2564 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2565 nla_nest_cancel(skb, attr);
2566 nla_nest_cancel(skb, rxsa_list);
2567 nla_nest_cancel(skb, rxsc_nest);
2568 nla_nest_cancel(skb, rxsc_list);
2569 goto nla_put_failure;
2571 nla_nest_end(skb, attr);
2573 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2574 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2575 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2576 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2577 nla_nest_cancel(skb, rxsa_nest);
2578 nla_nest_cancel(skb, rxsc_nest);
2579 nla_nest_cancel(skb, rxsc_list);
2580 goto nla_put_failure;
2582 nla_nest_end(skb, rxsa_nest);
2585 nla_nest_end(skb, rxsa_list);
2586 nla_nest_end(skb, rxsc_nest);
2589 nla_nest_end(skb, rxsc_list);
2591 genlmsg_end(skb, hdr);
2596 genlmsg_cancel(skb, hdr);
2600 static int macsec_generation = 1; /* protected by RTNL */
2602 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2604 struct net *net = sock_net(skb->sk);
2605 struct net_device *dev;
2608 dev_idx = cb->args[0];
2613 cb->seq = macsec_generation;
2615 for_each_netdev(net, dev) {
2616 struct macsec_secy *secy;
2621 if (!netif_is_macsec(dev))
2624 secy = &macsec_priv(dev)->secy;
2625 if (dump_secy(secy, dev, skb, cb) < 0)
2637 static const struct genl_ops macsec_genl_ops[] = {
2639 .cmd = MACSEC_CMD_GET_TXSC,
2640 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2641 .dumpit = macsec_dump_txsc,
2644 .cmd = MACSEC_CMD_ADD_RXSC,
2645 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2646 .doit = macsec_add_rxsc,
2647 .flags = GENL_ADMIN_PERM,
2650 .cmd = MACSEC_CMD_DEL_RXSC,
2651 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2652 .doit = macsec_del_rxsc,
2653 .flags = GENL_ADMIN_PERM,
2656 .cmd = MACSEC_CMD_UPD_RXSC,
2657 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2658 .doit = macsec_upd_rxsc,
2659 .flags = GENL_ADMIN_PERM,
2662 .cmd = MACSEC_CMD_ADD_TXSA,
2663 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2664 .doit = macsec_add_txsa,
2665 .flags = GENL_ADMIN_PERM,
2668 .cmd = MACSEC_CMD_DEL_TXSA,
2669 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2670 .doit = macsec_del_txsa,
2671 .flags = GENL_ADMIN_PERM,
2674 .cmd = MACSEC_CMD_UPD_TXSA,
2675 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2676 .doit = macsec_upd_txsa,
2677 .flags = GENL_ADMIN_PERM,
2680 .cmd = MACSEC_CMD_ADD_RXSA,
2681 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2682 .doit = macsec_add_rxsa,
2683 .flags = GENL_ADMIN_PERM,
2686 .cmd = MACSEC_CMD_DEL_RXSA,
2687 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2688 .doit = macsec_del_rxsa,
2689 .flags = GENL_ADMIN_PERM,
2692 .cmd = MACSEC_CMD_UPD_RXSA,
2693 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2694 .doit = macsec_upd_rxsa,
2695 .flags = GENL_ADMIN_PERM,
2699 static struct genl_family macsec_fam __ro_after_init = {
2700 .name = MACSEC_GENL_NAME,
2702 .version = MACSEC_GENL_VERSION,
2703 .maxattr = MACSEC_ATTR_MAX,
2704 .policy = macsec_genl_policy,
2706 .module = THIS_MODULE,
2707 .ops = macsec_genl_ops,
2708 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2711 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2712 struct net_device *dev)
2714 struct macsec_dev *macsec = netdev_priv(dev);
2715 struct macsec_secy *secy = &macsec->secy;
2716 struct pcpu_secy_stats *secy_stats;
2720 if (!secy->protect_frames) {
2721 secy_stats = this_cpu_ptr(macsec->stats);
2722 u64_stats_update_begin(&secy_stats->syncp);
2723 secy_stats->stats.OutPktsUntagged++;
2724 u64_stats_update_end(&secy_stats->syncp);
2725 skb->dev = macsec->real_dev;
2727 ret = dev_queue_xmit(skb);
2728 count_tx(dev, ret, len);
2732 if (!secy->operational) {
2734 dev->stats.tx_dropped++;
2735 return NETDEV_TX_OK;
2738 skb = macsec_encrypt(skb, dev);
2740 if (PTR_ERR(skb) != -EINPROGRESS)
2741 dev->stats.tx_dropped++;
2742 return NETDEV_TX_OK;
2745 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2747 macsec_encrypt_finish(skb, dev);
2749 ret = dev_queue_xmit(skb);
2750 count_tx(dev, ret, len);
2754 #define MACSEC_FEATURES \
2755 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2757 static int macsec_dev_init(struct net_device *dev)
2759 struct macsec_dev *macsec = macsec_priv(dev);
2760 struct net_device *real_dev = macsec->real_dev;
2763 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2767 err = gro_cells_init(&macsec->gro_cells, dev);
2769 free_percpu(dev->tstats);
2773 dev->features = real_dev->features & MACSEC_FEATURES;
2774 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2776 dev->needed_headroom = real_dev->needed_headroom +
2777 MACSEC_NEEDED_HEADROOM;
2778 dev->needed_tailroom = real_dev->needed_tailroom +
2779 MACSEC_NEEDED_TAILROOM;
2781 if (is_zero_ether_addr(dev->dev_addr))
2782 eth_hw_addr_inherit(dev, real_dev);
2783 if (is_zero_ether_addr(dev->broadcast))
2784 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2789 static void macsec_dev_uninit(struct net_device *dev)
2791 struct macsec_dev *macsec = macsec_priv(dev);
2793 gro_cells_destroy(&macsec->gro_cells);
2794 free_percpu(dev->tstats);
2797 static netdev_features_t macsec_fix_features(struct net_device *dev,
2798 netdev_features_t features)
2800 struct macsec_dev *macsec = macsec_priv(dev);
2801 struct net_device *real_dev = macsec->real_dev;
2803 features &= (real_dev->features & MACSEC_FEATURES) |
2804 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2805 features |= NETIF_F_LLTX;
2810 static int macsec_dev_open(struct net_device *dev)
2812 struct macsec_dev *macsec = macsec_priv(dev);
2813 struct net_device *real_dev = macsec->real_dev;
2816 err = dev_uc_add(real_dev, dev->dev_addr);
2820 if (dev->flags & IFF_ALLMULTI) {
2821 err = dev_set_allmulti(real_dev, 1);
2826 if (dev->flags & IFF_PROMISC) {
2827 err = dev_set_promiscuity(real_dev, 1);
2829 goto clear_allmulti;
2832 if (netif_carrier_ok(real_dev))
2833 netif_carrier_on(dev);
2837 if (dev->flags & IFF_ALLMULTI)
2838 dev_set_allmulti(real_dev, -1);
2840 dev_uc_del(real_dev, dev->dev_addr);
2841 netif_carrier_off(dev);
2845 static int macsec_dev_stop(struct net_device *dev)
2847 struct macsec_dev *macsec = macsec_priv(dev);
2848 struct net_device *real_dev = macsec->real_dev;
2850 netif_carrier_off(dev);
2852 dev_mc_unsync(real_dev, dev);
2853 dev_uc_unsync(real_dev, dev);
2855 if (dev->flags & IFF_ALLMULTI)
2856 dev_set_allmulti(real_dev, -1);
2858 if (dev->flags & IFF_PROMISC)
2859 dev_set_promiscuity(real_dev, -1);
2861 dev_uc_del(real_dev, dev->dev_addr);
2866 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2868 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2870 if (!(dev->flags & IFF_UP))
2873 if (change & IFF_ALLMULTI)
2874 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2876 if (change & IFF_PROMISC)
2877 dev_set_promiscuity(real_dev,
2878 dev->flags & IFF_PROMISC ? 1 : -1);
2881 static void macsec_dev_set_rx_mode(struct net_device *dev)
2883 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2885 dev_mc_sync(real_dev, dev);
2886 dev_uc_sync(real_dev, dev);
2889 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
2891 return make_sci(dev->dev_addr, port);
2894 static int macsec_set_mac_address(struct net_device *dev, void *p)
2896 struct macsec_dev *macsec = macsec_priv(dev);
2897 struct net_device *real_dev = macsec->real_dev;
2898 struct sockaddr *addr = p;
2901 if (!is_valid_ether_addr(addr->sa_data))
2902 return -EADDRNOTAVAIL;
2904 if (!(dev->flags & IFF_UP))
2907 err = dev_uc_add(real_dev, addr->sa_data);
2911 dev_uc_del(real_dev, dev->dev_addr);
2914 ether_addr_copy(dev->dev_addr, addr->sa_data);
2915 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
2919 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2921 struct macsec_dev *macsec = macsec_priv(dev);
2922 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2924 if (macsec->real_dev->mtu - extra < new_mtu)
2932 static void macsec_get_stats64(struct net_device *dev,
2933 struct rtnl_link_stats64 *s)
2940 for_each_possible_cpu(cpu) {
2941 struct pcpu_sw_netstats *stats;
2942 struct pcpu_sw_netstats tmp;
2945 stats = per_cpu_ptr(dev->tstats, cpu);
2947 start = u64_stats_fetch_begin_irq(&stats->syncp);
2948 tmp.rx_packets = stats->rx_packets;
2949 tmp.rx_bytes = stats->rx_bytes;
2950 tmp.tx_packets = stats->tx_packets;
2951 tmp.tx_bytes = stats->tx_bytes;
2952 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2954 s->rx_packets += tmp.rx_packets;
2955 s->rx_bytes += tmp.rx_bytes;
2956 s->tx_packets += tmp.tx_packets;
2957 s->tx_bytes += tmp.tx_bytes;
2960 s->rx_dropped = dev->stats.rx_dropped;
2961 s->tx_dropped = dev->stats.tx_dropped;
2964 static int macsec_get_iflink(const struct net_device *dev)
2966 return macsec_priv(dev)->real_dev->ifindex;
2969 static const struct net_device_ops macsec_netdev_ops = {
2970 .ndo_init = macsec_dev_init,
2971 .ndo_uninit = macsec_dev_uninit,
2972 .ndo_open = macsec_dev_open,
2973 .ndo_stop = macsec_dev_stop,
2974 .ndo_fix_features = macsec_fix_features,
2975 .ndo_change_mtu = macsec_change_mtu,
2976 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2977 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2978 .ndo_set_mac_address = macsec_set_mac_address,
2979 .ndo_start_xmit = macsec_start_xmit,
2980 .ndo_get_stats64 = macsec_get_stats64,
2981 .ndo_get_iflink = macsec_get_iflink,
2984 static const struct device_type macsec_type = {
2988 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2989 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2990 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
2991 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2992 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2993 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2994 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2995 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2996 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2997 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2998 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2999 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3000 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3001 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3004 static void macsec_free_netdev(struct net_device *dev)
3006 struct macsec_dev *macsec = macsec_priv(dev);
3008 free_percpu(macsec->stats);
3009 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 int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3192 struct macsec_dev *macsec = macsec_priv(dev);
3193 struct macsec_secy *secy = &macsec->secy;
3195 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3199 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3200 if (!secy->tx_sc.stats) {
3201 free_percpu(macsec->stats);
3205 if (sci == MACSEC_UNDEF_SCI)
3206 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3209 secy->operational = true;
3210 secy->key_len = DEFAULT_SAK_LEN;
3211 secy->icv_len = icv_len;
3212 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3213 secy->protect_frames = true;
3214 secy->replay_protect = false;
3217 secy->tx_sc.active = true;
3218 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3219 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3220 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3221 secy->tx_sc.end_station = false;
3222 secy->tx_sc.scb = false;
3227 static int macsec_newlink(struct net *net, struct net_device *dev,
3228 struct nlattr *tb[], struct nlattr *data[],
3229 struct netlink_ext_ack *extack)
3231 struct macsec_dev *macsec = macsec_priv(dev);
3232 rx_handler_func_t *rx_handler;
3233 u8 icv_len = DEFAULT_ICV_LEN;
3234 struct net_device *real_dev;
3240 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3243 if (real_dev->type != ARPHRD_ETHER)
3246 dev->priv_flags |= IFF_MACSEC;
3248 macsec->real_dev = real_dev;
3250 /* send_sci must be set to true when transmit sci explicitly is set */
3251 if ((data && data[IFLA_MACSEC_SCI]) &&
3252 (data && data[IFLA_MACSEC_INC_SCI])) {
3253 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3259 if (data && data[IFLA_MACSEC_ICV_LEN])
3260 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3261 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3267 rx_handler = rtnl_dereference(real_dev->rx_handler);
3268 if (rx_handler && rx_handler != macsec_handle_frame)
3271 err = register_netdevice(dev);
3275 err = netdev_upper_dev_link(real_dev, dev, extack);
3279 /* need to be already registered so that ->init has run and
3280 * the MAC addr is set
3282 if (data && data[IFLA_MACSEC_SCI])
3283 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3284 else if (data && data[IFLA_MACSEC_PORT])
3285 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3287 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3289 if (rx_handler && sci_exists(real_dev, sci)) {
3294 err = macsec_add_dev(dev, sci, icv_len);
3299 err = macsec_changelink_common(dev, data);
3304 err = register_macsec_dev(real_dev, dev);
3308 netif_stacked_transfer_operstate(real_dev, dev);
3309 linkwatch_fire_event(dev);
3311 macsec_generation++;
3316 macsec_del_dev(macsec);
3318 netdev_upper_dev_unlink(real_dev, dev);
3320 unregister_netdevice(dev);
3324 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
3325 struct netlink_ext_ack *extack)
3327 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3328 u8 icv_len = DEFAULT_ICV_LEN;
3335 if (data[IFLA_MACSEC_CIPHER_SUITE])
3336 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3338 if (data[IFLA_MACSEC_ICV_LEN]) {
3339 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3340 if (icv_len != DEFAULT_ICV_LEN) {
3341 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3342 struct crypto_aead *dummy_tfm;
3344 dummy_tfm = macsec_alloc_tfm(dummy_key,
3347 if (IS_ERR(dummy_tfm))
3348 return PTR_ERR(dummy_tfm);
3349 crypto_free_aead(dummy_tfm);
3354 case MACSEC_CIPHER_ID_GCM_AES_128:
3355 case MACSEC_CIPHER_ID_GCM_AES_256:
3356 case MACSEC_DEFAULT_CIPHER_ID:
3357 if (icv_len < MACSEC_MIN_ICV_LEN ||
3358 icv_len > MACSEC_STD_ICV_LEN)
3365 if (data[IFLA_MACSEC_ENCODING_SA]) {
3366 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3370 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3371 flag < IFLA_MACSEC_VALIDATION;
3374 if (nla_get_u8(data[flag]) > 1)
3379 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3380 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3381 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3383 if ((sci && (scb || es)) || (scb && es))
3386 if (data[IFLA_MACSEC_VALIDATION] &&
3387 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3390 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3391 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3392 !data[IFLA_MACSEC_WINDOW])
3398 static struct net *macsec_get_link_net(const struct net_device *dev)
3400 return dev_net(macsec_priv(dev)->real_dev);
3403 static size_t macsec_get_size(const struct net_device *dev)
3405 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3406 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3407 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3408 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3409 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3410 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3411 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3412 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3413 nla_total_size(1) + /* IFLA_MACSEC_ES */
3414 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3415 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3416 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
3420 static int macsec_fill_info(struct sk_buff *skb,
3421 const struct net_device *dev)
3423 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3424 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3427 switch (secy->key_len) {
3428 case MACSEC_GCM_AES_128_SAK_LEN:
3429 csid = MACSEC_DEFAULT_CIPHER_ID;
3431 case MACSEC_GCM_AES_256_SAK_LEN:
3432 csid = MACSEC_CIPHER_ID_GCM_AES_256;
3435 goto nla_put_failure;
3438 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3440 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3441 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3442 csid, IFLA_MACSEC_PAD) ||
3443 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3444 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3445 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3446 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3447 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3448 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3449 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3450 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3452 goto nla_put_failure;
3454 if (secy->replay_protect) {
3455 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3456 goto nla_put_failure;
3465 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3467 .priv_size = sizeof(struct macsec_dev),
3468 .maxtype = IFLA_MACSEC_MAX,
3469 .policy = macsec_rtnl_policy,
3470 .setup = macsec_setup,
3471 .validate = macsec_validate_attr,
3472 .newlink = macsec_newlink,
3473 .changelink = macsec_changelink,
3474 .dellink = macsec_dellink,
3475 .get_size = macsec_get_size,
3476 .fill_info = macsec_fill_info,
3477 .get_link_net = macsec_get_link_net,
3480 static bool is_macsec_master(struct net_device *dev)
3482 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3485 static int macsec_notify(struct notifier_block *this, unsigned long event,
3488 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3491 if (!is_macsec_master(real_dev))
3497 case NETDEV_CHANGE: {
3498 struct macsec_dev *m, *n;
3499 struct macsec_rxh_data *rxd;
3501 rxd = macsec_data_rtnl(real_dev);
3502 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3503 struct net_device *dev = m->secy.netdev;
3505 netif_stacked_transfer_operstate(real_dev, dev);
3509 case NETDEV_UNREGISTER: {
3510 struct macsec_dev *m, *n;
3511 struct macsec_rxh_data *rxd;
3513 rxd = macsec_data_rtnl(real_dev);
3514 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3515 macsec_common_dellink(m->secy.netdev, &head);
3518 netdev_rx_handler_unregister(real_dev);
3521 unregister_netdevice_many(&head);
3524 case NETDEV_CHANGEMTU: {
3525 struct macsec_dev *m;
3526 struct macsec_rxh_data *rxd;
3528 rxd = macsec_data_rtnl(real_dev);
3529 list_for_each_entry(m, &rxd->secys, secys) {
3530 struct net_device *dev = m->secy.netdev;
3531 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3532 macsec_extra_len(true));
3535 dev_set_mtu(dev, mtu);
3543 static struct notifier_block macsec_notifier = {
3544 .notifier_call = macsec_notify,
3547 static int __init macsec_init(void)
3551 pr_info("MACsec IEEE 802.1AE\n");
3552 err = register_netdevice_notifier(&macsec_notifier);
3556 err = rtnl_link_register(&macsec_link_ops);
3560 err = genl_register_family(&macsec_fam);
3567 rtnl_link_unregister(&macsec_link_ops);
3569 unregister_netdevice_notifier(&macsec_notifier);
3573 static void __exit macsec_exit(void)
3575 genl_unregister_family(&macsec_fam);
3576 rtnl_link_unregister(&macsec_link_ops);
3577 unregister_netdevice_notifier(&macsec_notifier);
3581 module_init(macsec_init);
3582 module_exit(macsec_exit);
3584 MODULE_ALIAS_RTNL_LINK("macsec");
3585 MODULE_ALIAS_GENL_FAMILY("macsec");
3587 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3588 MODULE_LICENSE("GPL v2");