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>
20 #include <uapi/linux/if_macsec.h>
22 typedef u64 __bitwise sci_t;
24 #define MACSEC_SCI_LEN 8
26 /* SecTAG length = macsec_eth_header without the optional SCI */
27 #define MACSEC_TAG_LEN 6
29 struct macsec_eth_header {
33 #if defined(__LITTLE_ENDIAN_BITFIELD)
36 #elif defined(__BIG_ENDIAN_BITFIELD)
40 #error "Please fix <asm/byteorder.h>"
43 u8 secure_channel_id[8]; /* optional */
46 #define MACSEC_TCI_VERSION 0x80
47 #define MACSEC_TCI_ES 0x40 /* end station */
48 #define MACSEC_TCI_SC 0x20 /* SCI present */
49 #define MACSEC_TCI_SCB 0x10 /* epon */
50 #define MACSEC_TCI_E 0x08 /* encryption */
51 #define MACSEC_TCI_C 0x04 /* changed text */
52 #define MACSEC_AN_MASK 0x03 /* association number */
53 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
55 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
56 #define MIN_NON_SHORT_LEN 48
58 #define GCM_AES_IV_LEN 12
59 #define DEFAULT_ICV_LEN 16
61 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
63 #define for_each_rxsc(secy, sc) \
64 for (sc = rcu_dereference_bh(secy->rx_sc); \
66 sc = rcu_dereference_bh(sc->next))
67 #define for_each_rxsc_rtnl(secy, sc) \
68 for (sc = rtnl_dereference(secy->rx_sc); \
70 sc = rtnl_dereference(sc->next))
74 u8 secure_channel_id[8];
81 * struct macsec_key - SA key
82 * @id: user-provided key identifier
83 * @tfm: crypto struct, key storage
86 u8 id[MACSEC_KEYID_LEN];
87 struct crypto_aead *tfm;
90 struct macsec_rx_sc_stats {
91 __u64 InOctetsValidated;
92 __u64 InOctetsDecrypted;
93 __u64 InPktsUnchecked;
99 __u64 InPktsNotUsingSA;
100 __u64 InPktsUnusedSA;
103 struct macsec_rx_sa_stats {
106 __u32 InPktsNotValid;
107 __u32 InPktsNotUsingSA;
108 __u32 InPktsUnusedSA;
111 struct macsec_tx_sa_stats {
112 __u32 OutPktsProtected;
113 __u32 OutPktsEncrypted;
116 struct macsec_tx_sc_stats {
117 __u64 OutPktsProtected;
118 __u64 OutPktsEncrypted;
119 __u64 OutOctetsProtected;
120 __u64 OutOctetsEncrypted;
123 struct macsec_dev_stats {
124 __u64 OutPktsUntagged;
125 __u64 InPktsUntagged;
126 __u64 OutPktsTooLong;
129 __u64 InPktsUnknownSCI;
135 * struct macsec_rx_sa - receive secure association
137 * @next_pn: packet number expected for the next packet
138 * @lock: protects next_pn manipulations
139 * @key: key structure
140 * @stats: per-SA stats
142 struct macsec_rx_sa {
143 struct macsec_key key;
148 struct macsec_rx_sa_stats __percpu *stats;
149 struct macsec_rx_sc *sc;
153 struct pcpu_rx_sc_stats {
154 struct macsec_rx_sc_stats stats;
155 struct u64_stats_sync syncp;
159 * struct macsec_rx_sc - receive secure channel
160 * @sci: secure channel identifier for this SC
161 * @active: channel is active
162 * @sa: array of secure associations
163 * @stats: per-SC stats
165 struct macsec_rx_sc {
166 struct macsec_rx_sc __rcu *next;
169 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
170 struct pcpu_rx_sc_stats __percpu *stats;
172 struct rcu_head rcu_head;
176 * struct macsec_tx_sa - transmit secure association
178 * @next_pn: packet number to use for the next packet
179 * @lock: protects next_pn manipulations
180 * @key: key structure
181 * @stats: per-SA stats
183 struct macsec_tx_sa {
184 struct macsec_key key;
189 struct macsec_tx_sa_stats __percpu *stats;
193 struct pcpu_tx_sc_stats {
194 struct macsec_tx_sc_stats stats;
195 struct u64_stats_sync syncp;
199 * struct macsec_tx_sc - transmit secure channel
201 * @encoding_sa: association number of the SA currently in use
202 * @encrypt: encrypt packets on transmit, or authenticate only
203 * @send_sci: always include the SCI in the SecTAG
205 * @scb: single copy broadcast flag
206 * @sa: array of secure associations
207 * @stats: stats for this TXSC
209 struct macsec_tx_sc {
216 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
217 struct pcpu_tx_sc_stats __percpu *stats;
220 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
223 * struct macsec_secy - MACsec Security Entity
224 * @netdev: netdevice for this SecY
225 * @n_rx_sc: number of receive secure channels configured on this SecY
226 * @sci: secure channel identifier used for tx
227 * @key_len: length of keys used by the cipher suite
228 * @icv_len: length of ICV used by the cipher suite
229 * @validate_frames: validation mode
230 * @operational: MAC_Operational flag
231 * @protect_frames: enable protection for this SecY
232 * @replay_protect: enable packet number checks on receive
233 * @replay_window: size of the replay window
234 * @tx_sc: transmit secure channel
235 * @rx_sc: linked list of receive secure channels
238 struct net_device *netdev;
239 unsigned int n_rx_sc;
243 enum macsec_validation_type validate_frames;
248 struct macsec_tx_sc tx_sc;
249 struct macsec_rx_sc __rcu *rx_sc;
252 struct pcpu_secy_stats {
253 struct macsec_dev_stats stats;
254 struct u64_stats_sync syncp;
258 * struct macsec_dev - private data
260 * @real_dev: pointer to underlying netdevice
261 * @stats: MACsec device stats
262 * @secys: linked list of SecY's on the underlying device
265 struct macsec_secy secy;
266 struct net_device *real_dev;
267 struct pcpu_secy_stats __percpu *stats;
268 struct list_head secys;
269 struct gro_cells gro_cells;
273 * struct macsec_rxh_data - rx_handler private argument
274 * @secys: linked list of SecY's on this underlying device
276 struct macsec_rxh_data {
277 struct list_head secys;
280 static struct macsec_dev *macsec_priv(const struct net_device *dev)
282 return (struct macsec_dev *)netdev_priv(dev);
285 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
287 return rcu_dereference_bh(dev->rx_handler_data);
290 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
292 return rtnl_dereference(dev->rx_handler_data);
296 struct aead_request *req;
298 struct macsec_tx_sa *tx_sa;
299 struct macsec_rx_sa *rx_sa;
306 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
308 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
310 if (!sa || !sa->active)
313 if (!refcount_inc_not_zero(&sa->refcnt))
319 static void free_rx_sc_rcu(struct rcu_head *head)
321 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
323 free_percpu(rx_sc->stats);
327 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
329 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
332 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
334 if (refcount_dec_and_test(&sc->refcnt))
335 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
338 static void free_rxsa(struct rcu_head *head)
340 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
342 crypto_free_aead(sa->key.tfm);
343 free_percpu(sa->stats);
347 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
349 if (refcount_dec_and_test(&sa->refcnt))
350 call_rcu(&sa->rcu, free_rxsa);
353 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
355 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
357 if (!sa || !sa->active)
360 if (!refcount_inc_not_zero(&sa->refcnt))
366 static void free_txsa(struct rcu_head *head)
368 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
370 crypto_free_aead(sa->key.tfm);
371 free_percpu(sa->stats);
375 static void macsec_txsa_put(struct macsec_tx_sa *sa)
377 if (refcount_dec_and_test(&sa->refcnt))
378 call_rcu(&sa->rcu, free_txsa);
381 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
383 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
384 return (struct macsec_cb *)skb->cb;
387 #define MACSEC_PORT_ES (htons(0x0001))
388 #define MACSEC_PORT_SCB (0x0000)
389 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
391 #define MACSEC_GCM_AES_128_SAK_LEN 16
392 #define MACSEC_GCM_AES_256_SAK_LEN 32
394 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
395 #define DEFAULT_SEND_SCI true
396 #define DEFAULT_ENCRYPT false
397 #define DEFAULT_ENCODING_SA 0
399 static bool send_sci(const struct macsec_secy *secy)
401 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
403 return tx_sc->send_sci ||
404 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
407 static sci_t make_sci(u8 *addr, __be16 port)
411 memcpy(&sci, addr, ETH_ALEN);
412 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
417 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
422 memcpy(&sci, hdr->secure_channel_id,
423 sizeof(hdr->secure_channel_id));
425 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
430 static unsigned int macsec_sectag_len(bool sci_present)
432 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
435 static unsigned int macsec_hdr_len(bool sci_present)
437 return macsec_sectag_len(sci_present) + ETH_HLEN;
440 static unsigned int macsec_extra_len(bool sci_present)
442 return macsec_sectag_len(sci_present) + sizeof(__be16);
445 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
446 static void macsec_fill_sectag(struct macsec_eth_header *h,
447 const struct macsec_secy *secy, u32 pn,
450 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
452 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
453 h->eth.h_proto = htons(ETH_P_MACSEC);
456 h->tci_an |= MACSEC_TCI_SC;
457 memcpy(&h->secure_channel_id, &secy->sci,
458 sizeof(h->secure_channel_id));
460 if (tx_sc->end_station)
461 h->tci_an |= MACSEC_TCI_ES;
463 h->tci_an |= MACSEC_TCI_SCB;
466 h->packet_number = htonl(pn);
468 /* with GCM, C/E clear for !encrypt, both set for encrypt */
470 h->tci_an |= MACSEC_TCI_CONFID;
471 else if (secy->icv_len != DEFAULT_ICV_LEN)
472 h->tci_an |= MACSEC_TCI_C;
474 h->tci_an |= tx_sc->encoding_sa;
477 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
479 if (data_len < MIN_NON_SHORT_LEN)
480 h->short_length = data_len;
483 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
484 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
486 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
487 int len = skb->len - 2 * ETH_ALEN;
488 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
490 /* a) It comprises at least 17 octets */
494 /* b) MACsec EtherType: already checked */
496 /* c) V bit is clear */
497 if (h->tci_an & MACSEC_TCI_VERSION)
500 /* d) ES or SCB => !SC */
501 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
502 (h->tci_an & MACSEC_TCI_SC))
505 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
509 /* rx.pn != 0 (figure 10-5) */
510 if (!h->packet_number)
513 /* length check, f) g) h) i) */
515 return len == extra_len + h->short_length;
516 return len >= extra_len + MIN_NON_SHORT_LEN;
519 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
520 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
522 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
524 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
527 gcm_iv->pn = htonl(pn);
530 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
532 return (struct macsec_eth_header *)skb_mac_header(skb);
535 static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
539 spin_lock_bh(&tx_sa->lock);
543 if (tx_sa->next_pn == 0) {
544 pr_debug("PN wrapped, transitioning to !oper\n");
545 tx_sa->active = false;
546 if (secy->protect_frames)
547 secy->operational = false;
549 spin_unlock_bh(&tx_sa->lock);
554 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
556 struct macsec_dev *macsec = netdev_priv(dev);
558 skb->dev = macsec->real_dev;
559 skb_reset_mac_header(skb);
560 skb->protocol = eth_hdr(skb)->h_proto;
563 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
564 struct macsec_tx_sa *tx_sa)
566 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
568 u64_stats_update_begin(&txsc_stats->syncp);
569 if (tx_sc->encrypt) {
570 txsc_stats->stats.OutOctetsEncrypted += skb->len;
571 txsc_stats->stats.OutPktsEncrypted++;
572 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
574 txsc_stats->stats.OutOctetsProtected += skb->len;
575 txsc_stats->stats.OutPktsProtected++;
576 this_cpu_inc(tx_sa->stats->OutPktsProtected);
578 u64_stats_update_end(&txsc_stats->syncp);
581 static void count_tx(struct net_device *dev, int ret, int len)
583 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
584 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
586 u64_stats_update_begin(&stats->syncp);
588 stats->tx_bytes += len;
589 u64_stats_update_end(&stats->syncp);
593 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
595 struct sk_buff *skb = base->data;
596 struct net_device *dev = skb->dev;
597 struct macsec_dev *macsec = macsec_priv(dev);
598 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
601 aead_request_free(macsec_skb_cb(skb)->req);
604 macsec_encrypt_finish(skb, dev);
605 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
607 ret = dev_queue_xmit(skb);
608 count_tx(dev, ret, len);
609 rcu_read_unlock_bh();
615 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
617 struct scatterlist **sg,
620 size_t size, iv_offset, sg_offset;
621 struct aead_request *req;
624 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
626 size += GCM_AES_IV_LEN;
628 size = ALIGN(size, __alignof__(struct scatterlist));
630 size += sizeof(struct scatterlist) * num_frags;
632 tmp = kmalloc(size, GFP_ATOMIC);
636 *iv = (unsigned char *)(tmp + iv_offset);
637 *sg = (struct scatterlist *)(tmp + sg_offset);
640 aead_request_set_tfm(req, tfm);
645 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
646 struct net_device *dev)
649 struct scatterlist *sg;
650 struct sk_buff *trailer;
653 struct macsec_eth_header *hh;
654 size_t unprotected_len;
655 struct aead_request *req;
656 struct macsec_secy *secy;
657 struct macsec_tx_sc *tx_sc;
658 struct macsec_tx_sa *tx_sa;
659 struct macsec_dev *macsec = macsec_priv(dev);
663 secy = &macsec->secy;
664 tx_sc = &secy->tx_sc;
666 /* 10.5.1 TX SA assignment */
667 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
669 secy->operational = false;
671 return ERR_PTR(-EINVAL);
674 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
675 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
676 struct sk_buff *nskb = skb_copy_expand(skb,
677 MACSEC_NEEDED_HEADROOM,
678 MACSEC_NEEDED_TAILROOM,
684 macsec_txsa_put(tx_sa);
686 return ERR_PTR(-ENOMEM);
689 skb = skb_unshare(skb, GFP_ATOMIC);
691 macsec_txsa_put(tx_sa);
692 return ERR_PTR(-ENOMEM);
696 unprotected_len = skb->len;
698 sci_present = send_sci(secy);
699 hh = skb_push(skb, macsec_extra_len(sci_present));
700 memmove(hh, eth, 2 * ETH_ALEN);
702 pn = tx_sa_update_pn(tx_sa, secy);
704 macsec_txsa_put(tx_sa);
706 return ERR_PTR(-ENOLINK);
708 macsec_fill_sectag(hh, secy, pn, sci_present);
709 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
711 skb_put(skb, secy->icv_len);
713 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
714 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
716 u64_stats_update_begin(&secy_stats->syncp);
717 secy_stats->stats.OutPktsTooLong++;
718 u64_stats_update_end(&secy_stats->syncp);
720 macsec_txsa_put(tx_sa);
722 return ERR_PTR(-EINVAL);
725 ret = skb_cow_data(skb, 0, &trailer);
726 if (unlikely(ret < 0)) {
727 macsec_txsa_put(tx_sa);
732 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
734 macsec_txsa_put(tx_sa);
736 return ERR_PTR(-ENOMEM);
739 macsec_fill_iv(iv, secy->sci, pn);
741 sg_init_table(sg, ret);
742 ret = skb_to_sgvec(skb, sg, 0, skb->len);
743 if (unlikely(ret < 0)) {
744 aead_request_free(req);
745 macsec_txsa_put(tx_sa);
750 if (tx_sc->encrypt) {
751 int len = skb->len - macsec_hdr_len(sci_present) -
753 aead_request_set_crypt(req, sg, sg, len, iv);
754 aead_request_set_ad(req, macsec_hdr_len(sci_present));
756 aead_request_set_crypt(req, sg, sg, 0, iv);
757 aead_request_set_ad(req, skb->len - secy->icv_len);
760 macsec_skb_cb(skb)->req = req;
761 macsec_skb_cb(skb)->tx_sa = tx_sa;
762 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
765 ret = crypto_aead_encrypt(req);
766 if (ret == -EINPROGRESS) {
768 } else if (ret != 0) {
771 aead_request_free(req);
772 macsec_txsa_put(tx_sa);
773 return ERR_PTR(-EINVAL);
777 aead_request_free(req);
778 macsec_txsa_put(tx_sa);
783 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
785 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
786 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
787 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
790 spin_lock(&rx_sa->lock);
791 if (rx_sa->next_pn >= secy->replay_window)
792 lowest_pn = rx_sa->next_pn - secy->replay_window;
794 /* Now perform replay protection check again
795 * (see IEEE 802.1AE-2006 figure 10-5)
797 if (secy->replay_protect && pn < lowest_pn) {
798 spin_unlock(&rx_sa->lock);
799 u64_stats_update_begin(&rxsc_stats->syncp);
800 rxsc_stats->stats.InPktsLate++;
801 u64_stats_update_end(&rxsc_stats->syncp);
805 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
806 u64_stats_update_begin(&rxsc_stats->syncp);
807 if (hdr->tci_an & MACSEC_TCI_E)
808 rxsc_stats->stats.InOctetsDecrypted += skb->len;
810 rxsc_stats->stats.InOctetsValidated += skb->len;
811 u64_stats_update_end(&rxsc_stats->syncp);
814 if (!macsec_skb_cb(skb)->valid) {
815 spin_unlock(&rx_sa->lock);
818 if (hdr->tci_an & MACSEC_TCI_C ||
819 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
820 u64_stats_update_begin(&rxsc_stats->syncp);
821 rxsc_stats->stats.InPktsNotValid++;
822 u64_stats_update_end(&rxsc_stats->syncp);
826 u64_stats_update_begin(&rxsc_stats->syncp);
827 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
828 rxsc_stats->stats.InPktsInvalid++;
829 this_cpu_inc(rx_sa->stats->InPktsInvalid);
830 } else if (pn < lowest_pn) {
831 rxsc_stats->stats.InPktsDelayed++;
833 rxsc_stats->stats.InPktsUnchecked++;
835 u64_stats_update_end(&rxsc_stats->syncp);
837 u64_stats_update_begin(&rxsc_stats->syncp);
838 if (pn < lowest_pn) {
839 rxsc_stats->stats.InPktsDelayed++;
841 rxsc_stats->stats.InPktsOK++;
842 this_cpu_inc(rx_sa->stats->InPktsOK);
844 u64_stats_update_end(&rxsc_stats->syncp);
846 if (pn >= rx_sa->next_pn)
847 rx_sa->next_pn = pn + 1;
848 spin_unlock(&rx_sa->lock);
854 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
856 skb->pkt_type = PACKET_HOST;
857 skb->protocol = eth_type_trans(skb, dev);
859 skb_reset_network_header(skb);
860 if (!skb_transport_header_was_set(skb))
861 skb_reset_transport_header(skb);
862 skb_reset_mac_len(skb);
865 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
867 skb->ip_summed = CHECKSUM_NONE;
868 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
869 skb_pull(skb, hdr_len);
870 pskb_trim_unique(skb, skb->len - icv_len);
873 static void count_rx(struct net_device *dev, int len)
875 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
877 u64_stats_update_begin(&stats->syncp);
879 stats->rx_bytes += len;
880 u64_stats_update_end(&stats->syncp);
883 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
885 struct sk_buff *skb = base->data;
886 struct net_device *dev = skb->dev;
887 struct macsec_dev *macsec = macsec_priv(dev);
888 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
889 struct macsec_rx_sc *rx_sc = rx_sa->sc;
893 aead_request_free(macsec_skb_cb(skb)->req);
896 macsec_skb_cb(skb)->valid = true;
899 pn = ntohl(macsec_ethhdr(skb)->packet_number);
900 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
901 rcu_read_unlock_bh();
906 macsec_finalize_skb(skb, macsec->secy.icv_len,
907 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
908 macsec_reset_skb(skb, macsec->secy.netdev);
911 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
914 rcu_read_unlock_bh();
917 macsec_rxsa_put(rx_sa);
918 macsec_rxsc_put(rx_sc);
922 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
923 struct net_device *dev,
924 struct macsec_rx_sa *rx_sa,
926 struct macsec_secy *secy)
929 struct scatterlist *sg;
930 struct sk_buff *trailer;
932 struct aead_request *req;
933 struct macsec_eth_header *hdr;
934 u16 icv_len = secy->icv_len;
936 macsec_skb_cb(skb)->valid = false;
937 skb = skb_share_check(skb, GFP_ATOMIC);
939 return ERR_PTR(-ENOMEM);
941 ret = skb_cow_data(skb, 0, &trailer);
942 if (unlikely(ret < 0)) {
946 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
949 return ERR_PTR(-ENOMEM);
952 hdr = (struct macsec_eth_header *)skb->data;
953 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
955 sg_init_table(sg, ret);
956 ret = skb_to_sgvec(skb, sg, 0, skb->len);
957 if (unlikely(ret < 0)) {
958 aead_request_free(req);
963 if (hdr->tci_an & MACSEC_TCI_E) {
964 /* confidentiality: ethernet + macsec header
965 * authenticated, encrypted payload
967 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
969 aead_request_set_crypt(req, sg, sg, len, iv);
970 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
971 skb = skb_unshare(skb, GFP_ATOMIC);
973 aead_request_free(req);
974 return ERR_PTR(-ENOMEM);
977 /* integrity only: all headers + data authenticated */
978 aead_request_set_crypt(req, sg, sg, icv_len, iv);
979 aead_request_set_ad(req, skb->len - icv_len);
982 macsec_skb_cb(skb)->req = req;
984 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
987 ret = crypto_aead_decrypt(req);
988 if (ret == -EINPROGRESS) {
990 } else if (ret != 0) {
991 /* decryption/authentication failed
992 * 10.6 if validateFrames is disabled, deliver anyway
994 if (ret != -EBADMSG) {
999 macsec_skb_cb(skb)->valid = true;
1003 aead_request_free(req);
1008 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
1010 struct macsec_rx_sc *rx_sc;
1012 for_each_rxsc(secy, rx_sc) {
1013 if (rx_sc->sci == sci)
1020 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
1022 struct macsec_rx_sc *rx_sc;
1024 for_each_rxsc_rtnl(secy, rx_sc) {
1025 if (rx_sc->sci == sci)
1032 static void handle_not_macsec(struct sk_buff *skb)
1034 struct macsec_rxh_data *rxd;
1035 struct macsec_dev *macsec;
1038 rxd = macsec_data_rcu(skb->dev);
1040 /* 10.6 If the management control validateFrames is not
1041 * Strict, frames without a SecTAG are received, counted, and
1042 * delivered to the Controlled Port
1044 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1045 struct sk_buff *nskb;
1046 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1048 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1049 u64_stats_update_begin(&secy_stats->syncp);
1050 secy_stats->stats.InPktsNoTag++;
1051 u64_stats_update_end(&secy_stats->syncp);
1055 /* deliver on this port */
1056 nskb = skb_clone(skb, GFP_ATOMIC);
1060 nskb->dev = macsec->secy.netdev;
1062 if (netif_rx(nskb) == NET_RX_SUCCESS) {
1063 u64_stats_update_begin(&secy_stats->syncp);
1064 secy_stats->stats.InPktsUntagged++;
1065 u64_stats_update_end(&secy_stats->syncp);
1072 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1074 struct sk_buff *skb = *pskb;
1075 struct net_device *dev = skb->dev;
1076 struct macsec_eth_header *hdr;
1077 struct macsec_secy *secy = NULL;
1078 struct macsec_rx_sc *rx_sc;
1079 struct macsec_rx_sa *rx_sa;
1080 struct macsec_rxh_data *rxd;
1081 struct macsec_dev *macsec;
1085 struct pcpu_rx_sc_stats *rxsc_stats;
1086 struct pcpu_secy_stats *secy_stats;
1090 if (skb_headroom(skb) < ETH_HLEN)
1093 hdr = macsec_ethhdr(skb);
1094 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1095 handle_not_macsec(skb);
1097 /* and deliver to the uncontrolled port */
1098 return RX_HANDLER_PASS;
1101 skb = skb_unshare(skb, GFP_ATOMIC);
1104 return RX_HANDLER_CONSUMED;
1106 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1108 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1112 hdr = macsec_ethhdr(skb);
1114 /* Frames with a SecTAG that has the TCI E bit set but the C
1115 * bit clear are discarded, as this reserved encoding is used
1116 * to identify frames with a SecTAG that are not to be
1117 * delivered to the Controlled Port.
1119 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1120 return RX_HANDLER_PASS;
1122 /* now, pull the extra length */
1123 if (hdr->tci_an & MACSEC_TCI_SC) {
1128 /* ethernet header is part of crypto processing */
1129 skb_push(skb, ETH_HLEN);
1131 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1132 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1133 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1136 rxd = macsec_data_rcu(skb->dev);
1138 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1139 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1141 sc = sc ? macsec_rxsc_get(sc) : NULL;
1144 secy = &macsec->secy;
1154 macsec = macsec_priv(dev);
1155 secy_stats = this_cpu_ptr(macsec->stats);
1156 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1158 if (!macsec_validate_skb(skb, secy->icv_len)) {
1159 u64_stats_update_begin(&secy_stats->syncp);
1160 secy_stats->stats.InPktsBadTag++;
1161 u64_stats_update_end(&secy_stats->syncp);
1165 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1167 /* 10.6.1 if the SA is not in use */
1169 /* If validateFrames is Strict or the C bit in the
1170 * SecTAG is set, discard
1172 if (hdr->tci_an & MACSEC_TCI_C ||
1173 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1174 u64_stats_update_begin(&rxsc_stats->syncp);
1175 rxsc_stats->stats.InPktsNotUsingSA++;
1176 u64_stats_update_end(&rxsc_stats->syncp);
1180 /* not Strict, the frame (with the SecTAG and ICV
1181 * removed) is delivered to the Controlled Port.
1183 u64_stats_update_begin(&rxsc_stats->syncp);
1184 rxsc_stats->stats.InPktsUnusedSA++;
1185 u64_stats_update_end(&rxsc_stats->syncp);
1189 /* First, PN check to avoid decrypting obviously wrong packets */
1190 pn = ntohl(hdr->packet_number);
1191 if (secy->replay_protect) {
1194 spin_lock(&rx_sa->lock);
1195 late = rx_sa->next_pn >= secy->replay_window &&
1196 pn < (rx_sa->next_pn - secy->replay_window);
1197 spin_unlock(&rx_sa->lock);
1200 u64_stats_update_begin(&rxsc_stats->syncp);
1201 rxsc_stats->stats.InPktsLate++;
1202 u64_stats_update_end(&rxsc_stats->syncp);
1207 macsec_skb_cb(skb)->rx_sa = rx_sa;
1209 /* Disabled && !changed text => skip validation */
1210 if (hdr->tci_an & MACSEC_TCI_C ||
1211 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1212 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1215 /* the decrypt callback needs the reference */
1216 if (PTR_ERR(skb) != -EINPROGRESS) {
1217 macsec_rxsa_put(rx_sa);
1218 macsec_rxsc_put(rx_sc);
1222 return RX_HANDLER_CONSUMED;
1225 if (!macsec_post_decrypt(skb, secy, pn))
1229 macsec_finalize_skb(skb, secy->icv_len,
1230 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1231 macsec_reset_skb(skb, secy->netdev);
1234 macsec_rxsa_put(rx_sa);
1235 macsec_rxsc_put(rx_sc);
1238 ret = gro_cells_receive(&macsec->gro_cells, skb);
1239 if (ret == NET_RX_SUCCESS)
1240 count_rx(dev, skb->len);
1242 macsec->secy.netdev->stats.rx_dropped++;
1247 return RX_HANDLER_CONSUMED;
1250 macsec_rxsa_put(rx_sa);
1252 macsec_rxsc_put(rx_sc);
1257 return RX_HANDLER_CONSUMED;
1260 /* 10.6.1 if the SC is not found */
1261 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1263 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1264 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1266 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1267 struct sk_buff *nskb;
1269 secy_stats = this_cpu_ptr(macsec->stats);
1271 /* If validateFrames is Strict or the C bit in the
1272 * SecTAG is set, discard
1275 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1276 u64_stats_update_begin(&secy_stats->syncp);
1277 secy_stats->stats.InPktsNoSCI++;
1278 u64_stats_update_end(&secy_stats->syncp);
1282 /* not strict, the frame (with the SecTAG and ICV
1283 * removed) is delivered to the Controlled Port.
1285 nskb = skb_clone(skb, GFP_ATOMIC);
1289 macsec_reset_skb(nskb, macsec->secy.netdev);
1291 ret = netif_rx(nskb);
1292 if (ret == NET_RX_SUCCESS) {
1293 u64_stats_update_begin(&secy_stats->syncp);
1294 secy_stats->stats.InPktsUnknownSCI++;
1295 u64_stats_update_end(&secy_stats->syncp);
1297 macsec->secy.netdev->stats.rx_dropped++;
1303 return RX_HANDLER_PASS;
1306 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1308 struct crypto_aead *tfm;
1311 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1316 ret = crypto_aead_setkey(tfm, key, key_len);
1320 ret = crypto_aead_setauthsize(tfm, icv_len);
1326 crypto_free_aead(tfm);
1327 return ERR_PTR(ret);
1330 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1333 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1337 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1338 if (IS_ERR(rx_sa->key.tfm)) {
1339 free_percpu(rx_sa->stats);
1340 return PTR_ERR(rx_sa->key.tfm);
1343 rx_sa->active = false;
1345 refcount_set(&rx_sa->refcnt, 1);
1346 spin_lock_init(&rx_sa->lock);
1351 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1353 rx_sa->active = false;
1355 macsec_rxsa_put(rx_sa);
1358 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1362 for (i = 0; i < MACSEC_NUM_AN; i++) {
1363 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1365 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1370 macsec_rxsc_put(rx_sc);
1373 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1375 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1377 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1379 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1380 if (rx_sc->sci == sci) {
1383 rcu_assign_pointer(*rx_scp, rx_sc->next);
1391 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1393 struct macsec_rx_sc *rx_sc;
1394 struct macsec_dev *macsec;
1395 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1396 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1397 struct macsec_secy *secy;
1399 list_for_each_entry(macsec, &rxd->secys, secys) {
1400 if (find_rx_sc_rtnl(&macsec->secy, sci))
1401 return ERR_PTR(-EEXIST);
1404 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1406 return ERR_PTR(-ENOMEM);
1408 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1409 if (!rx_sc->stats) {
1411 return ERR_PTR(-ENOMEM);
1415 rx_sc->active = true;
1416 refcount_set(&rx_sc->refcnt, 1);
1418 secy = &macsec_priv(dev)->secy;
1419 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1420 rcu_assign_pointer(secy->rx_sc, rx_sc);
1428 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1431 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1435 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1436 if (IS_ERR(tx_sa->key.tfm)) {
1437 free_percpu(tx_sa->stats);
1438 return PTR_ERR(tx_sa->key.tfm);
1441 tx_sa->active = false;
1442 refcount_set(&tx_sa->refcnt, 1);
1443 spin_lock_init(&tx_sa->lock);
1448 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1450 tx_sa->active = false;
1452 macsec_txsa_put(tx_sa);
1455 static struct genl_family macsec_fam;
1457 static struct net_device *get_dev_from_nl(struct net *net,
1458 struct nlattr **attrs)
1460 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1461 struct net_device *dev;
1463 dev = __dev_get_by_index(net, ifindex);
1465 return ERR_PTR(-ENODEV);
1467 if (!netif_is_macsec(dev))
1468 return ERR_PTR(-ENODEV);
1473 static sci_t nla_get_sci(const struct nlattr *nla)
1475 return (__force sci_t)nla_get_u64(nla);
1478 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1481 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1484 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1485 struct nlattr **attrs,
1486 struct nlattr **tb_sa,
1487 struct net_device **devp,
1488 struct macsec_secy **secyp,
1489 struct macsec_tx_sc **scp,
1492 struct net_device *dev;
1493 struct macsec_secy *secy;
1494 struct macsec_tx_sc *tx_sc;
1495 struct macsec_tx_sa *tx_sa;
1497 if (!tb_sa[MACSEC_SA_ATTR_AN])
1498 return ERR_PTR(-EINVAL);
1500 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1502 dev = get_dev_from_nl(net, attrs);
1504 return ERR_CAST(dev);
1506 if (*assoc_num >= MACSEC_NUM_AN)
1507 return ERR_PTR(-EINVAL);
1509 secy = &macsec_priv(dev)->secy;
1510 tx_sc = &secy->tx_sc;
1512 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1514 return ERR_PTR(-ENODEV);
1522 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1523 struct nlattr **attrs,
1524 struct nlattr **tb_rxsc,
1525 struct net_device **devp,
1526 struct macsec_secy **secyp)
1528 struct net_device *dev;
1529 struct macsec_secy *secy;
1530 struct macsec_rx_sc *rx_sc;
1533 dev = get_dev_from_nl(net, attrs);
1535 return ERR_CAST(dev);
1537 secy = &macsec_priv(dev)->secy;
1539 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1540 return ERR_PTR(-EINVAL);
1542 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1543 rx_sc = find_rx_sc_rtnl(secy, sci);
1545 return ERR_PTR(-ENODEV);
1553 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1554 struct nlattr **attrs,
1555 struct nlattr **tb_rxsc,
1556 struct nlattr **tb_sa,
1557 struct net_device **devp,
1558 struct macsec_secy **secyp,
1559 struct macsec_rx_sc **scp,
1562 struct macsec_rx_sc *rx_sc;
1563 struct macsec_rx_sa *rx_sa;
1565 if (!tb_sa[MACSEC_SA_ATTR_AN])
1566 return ERR_PTR(-EINVAL);
1568 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1569 if (*assoc_num >= MACSEC_NUM_AN)
1570 return ERR_PTR(-EINVAL);
1572 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1574 return ERR_CAST(rx_sc);
1576 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1578 return ERR_PTR(-ENODEV);
1584 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1585 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1586 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1587 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1590 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1591 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1592 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1595 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1596 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1597 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1598 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
1599 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1600 .len = MACSEC_KEYID_LEN, },
1601 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1602 .len = MACSEC_MAX_KEY_LEN, },
1605 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1607 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1610 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1616 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1618 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1621 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1627 static bool validate_add_rxsa(struct nlattr **attrs)
1629 if (!attrs[MACSEC_SA_ATTR_AN] ||
1630 !attrs[MACSEC_SA_ATTR_KEY] ||
1631 !attrs[MACSEC_SA_ATTR_KEYID])
1634 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1637 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1640 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1641 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1645 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1651 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1653 struct net_device *dev;
1654 struct nlattr **attrs = info->attrs;
1655 struct macsec_secy *secy;
1656 struct macsec_rx_sc *rx_sc;
1657 struct macsec_rx_sa *rx_sa;
1658 unsigned char assoc_num;
1659 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1660 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1663 if (!attrs[MACSEC_ATTR_IFINDEX])
1666 if (parse_sa_config(attrs, tb_sa))
1669 if (parse_rxsc_config(attrs, tb_rxsc))
1672 if (!validate_add_rxsa(tb_sa))
1676 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1677 if (IS_ERR(rx_sc)) {
1679 return PTR_ERR(rx_sc);
1682 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1684 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1685 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1686 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1691 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1697 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1703 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1704 secy->key_len, secy->icv_len);
1711 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1712 spin_lock_bh(&rx_sa->lock);
1713 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1714 spin_unlock_bh(&rx_sa->lock);
1717 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1718 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1720 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1722 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1729 static bool validate_add_rxsc(struct nlattr **attrs)
1731 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1734 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1735 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1742 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1744 struct net_device *dev;
1745 sci_t sci = MACSEC_UNDEF_SCI;
1746 struct nlattr **attrs = info->attrs;
1747 struct macsec_rx_sc *rx_sc;
1748 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1750 if (!attrs[MACSEC_ATTR_IFINDEX])
1753 if (parse_rxsc_config(attrs, tb_rxsc))
1756 if (!validate_add_rxsc(tb_rxsc))
1760 dev = get_dev_from_nl(genl_info_net(info), attrs);
1763 return PTR_ERR(dev);
1766 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1768 rx_sc = create_rx_sc(dev, sci);
1769 if (IS_ERR(rx_sc)) {
1771 return PTR_ERR(rx_sc);
1774 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1775 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1782 static bool validate_add_txsa(struct nlattr **attrs)
1784 if (!attrs[MACSEC_SA_ATTR_AN] ||
1785 !attrs[MACSEC_SA_ATTR_PN] ||
1786 !attrs[MACSEC_SA_ATTR_KEY] ||
1787 !attrs[MACSEC_SA_ATTR_KEYID])
1790 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1793 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1796 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1797 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1801 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1807 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1809 struct net_device *dev;
1810 struct nlattr **attrs = info->attrs;
1811 struct macsec_secy *secy;
1812 struct macsec_tx_sc *tx_sc;
1813 struct macsec_tx_sa *tx_sa;
1814 unsigned char assoc_num;
1815 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1818 if (!attrs[MACSEC_ATTR_IFINDEX])
1821 if (parse_sa_config(attrs, tb_sa))
1824 if (!validate_add_txsa(tb_sa))
1828 dev = get_dev_from_nl(genl_info_net(info), attrs);
1831 return PTR_ERR(dev);
1834 secy = &macsec_priv(dev)->secy;
1835 tx_sc = &secy->tx_sc;
1837 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1839 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1840 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1841 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1846 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1852 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
1858 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1859 secy->key_len, secy->icv_len);
1866 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1868 spin_lock_bh(&tx_sa->lock);
1869 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1870 spin_unlock_bh(&tx_sa->lock);
1872 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1873 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1875 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1876 secy->operational = true;
1878 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1885 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1887 struct nlattr **attrs = info->attrs;
1888 struct net_device *dev;
1889 struct macsec_secy *secy;
1890 struct macsec_rx_sc *rx_sc;
1891 struct macsec_rx_sa *rx_sa;
1893 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1894 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1896 if (!attrs[MACSEC_ATTR_IFINDEX])
1899 if (parse_sa_config(attrs, tb_sa))
1902 if (parse_rxsc_config(attrs, tb_rxsc))
1906 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1907 &dev, &secy, &rx_sc, &assoc_num);
1908 if (IS_ERR(rx_sa)) {
1910 return PTR_ERR(rx_sa);
1913 if (rx_sa->active) {
1918 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1926 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1928 struct nlattr **attrs = info->attrs;
1929 struct net_device *dev;
1930 struct macsec_secy *secy;
1931 struct macsec_rx_sc *rx_sc;
1933 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1935 if (!attrs[MACSEC_ATTR_IFINDEX])
1938 if (parse_rxsc_config(attrs, tb_rxsc))
1941 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1945 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1948 return PTR_ERR(dev);
1951 secy = &macsec_priv(dev)->secy;
1952 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1954 rx_sc = del_rx_sc(secy, sci);
1966 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1968 struct nlattr **attrs = info->attrs;
1969 struct net_device *dev;
1970 struct macsec_secy *secy;
1971 struct macsec_tx_sc *tx_sc;
1972 struct macsec_tx_sa *tx_sa;
1974 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1976 if (!attrs[MACSEC_ATTR_IFINDEX])
1979 if (parse_sa_config(attrs, tb_sa))
1983 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1984 &dev, &secy, &tx_sc, &assoc_num);
1985 if (IS_ERR(tx_sa)) {
1987 return PTR_ERR(tx_sa);
1990 if (tx_sa->active) {
1995 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2003 static bool validate_upd_sa(struct nlattr **attrs)
2005 if (!attrs[MACSEC_SA_ATTR_AN] ||
2006 attrs[MACSEC_SA_ATTR_KEY] ||
2007 attrs[MACSEC_SA_ATTR_KEYID])
2010 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2013 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2016 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2017 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2024 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2026 struct nlattr **attrs = info->attrs;
2027 struct net_device *dev;
2028 struct macsec_secy *secy;
2029 struct macsec_tx_sc *tx_sc;
2030 struct macsec_tx_sa *tx_sa;
2032 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2034 if (!attrs[MACSEC_ATTR_IFINDEX])
2037 if (parse_sa_config(attrs, tb_sa))
2040 if (!validate_upd_sa(tb_sa))
2044 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2045 &dev, &secy, &tx_sc, &assoc_num);
2046 if (IS_ERR(tx_sa)) {
2048 return PTR_ERR(tx_sa);
2051 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2052 spin_lock_bh(&tx_sa->lock);
2053 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2054 spin_unlock_bh(&tx_sa->lock);
2057 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2058 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2060 if (assoc_num == tx_sc->encoding_sa)
2061 secy->operational = tx_sa->active;
2068 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2070 struct nlattr **attrs = info->attrs;
2071 struct net_device *dev;
2072 struct macsec_secy *secy;
2073 struct macsec_rx_sc *rx_sc;
2074 struct macsec_rx_sa *rx_sa;
2076 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2077 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2079 if (!attrs[MACSEC_ATTR_IFINDEX])
2082 if (parse_rxsc_config(attrs, tb_rxsc))
2085 if (parse_sa_config(attrs, tb_sa))
2088 if (!validate_upd_sa(tb_sa))
2092 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2093 &dev, &secy, &rx_sc, &assoc_num);
2094 if (IS_ERR(rx_sa)) {
2096 return PTR_ERR(rx_sa);
2099 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2100 spin_lock_bh(&rx_sa->lock);
2101 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2102 spin_unlock_bh(&rx_sa->lock);
2105 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2106 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2112 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2114 struct nlattr **attrs = info->attrs;
2115 struct net_device *dev;
2116 struct macsec_secy *secy;
2117 struct macsec_rx_sc *rx_sc;
2118 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2120 if (!attrs[MACSEC_ATTR_IFINDEX])
2123 if (parse_rxsc_config(attrs, tb_rxsc))
2126 if (!validate_add_rxsc(tb_rxsc))
2130 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2131 if (IS_ERR(rx_sc)) {
2133 return PTR_ERR(rx_sc);
2136 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2137 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2139 if (rx_sc->active != new)
2140 secy->n_rx_sc += new ? 1 : -1;
2142 rx_sc->active = new;
2150 static int copy_tx_sa_stats(struct sk_buff *skb,
2151 struct macsec_tx_sa_stats __percpu *pstats)
2153 struct macsec_tx_sa_stats sum = {0, };
2156 for_each_possible_cpu(cpu) {
2157 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2159 sum.OutPktsProtected += stats->OutPktsProtected;
2160 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2163 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2164 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2170 static noinline_for_stack int
2171 copy_rx_sa_stats(struct sk_buff *skb,
2172 struct macsec_rx_sa_stats __percpu *pstats)
2174 struct macsec_rx_sa_stats sum = {0, };
2177 for_each_possible_cpu(cpu) {
2178 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2180 sum.InPktsOK += stats->InPktsOK;
2181 sum.InPktsInvalid += stats->InPktsInvalid;
2182 sum.InPktsNotValid += stats->InPktsNotValid;
2183 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2184 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2187 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2188 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2189 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2190 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2191 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2197 static noinline_for_stack int
2198 copy_rx_sc_stats(struct sk_buff *skb, struct pcpu_rx_sc_stats __percpu *pstats)
2200 struct macsec_rx_sc_stats sum = {0, };
2203 for_each_possible_cpu(cpu) {
2204 const struct pcpu_rx_sc_stats *stats;
2205 struct macsec_rx_sc_stats tmp;
2208 stats = per_cpu_ptr(pstats, cpu);
2210 start = u64_stats_fetch_begin_irq(&stats->syncp);
2211 memcpy(&tmp, &stats->stats, sizeof(tmp));
2212 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2214 sum.InOctetsValidated += tmp.InOctetsValidated;
2215 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2216 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2217 sum.InPktsDelayed += tmp.InPktsDelayed;
2218 sum.InPktsOK += tmp.InPktsOK;
2219 sum.InPktsInvalid += tmp.InPktsInvalid;
2220 sum.InPktsLate += tmp.InPktsLate;
2221 sum.InPktsNotValid += tmp.InPktsNotValid;
2222 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2223 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2226 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2227 sum.InOctetsValidated,
2228 MACSEC_RXSC_STATS_ATTR_PAD) ||
2229 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2230 sum.InOctetsDecrypted,
2231 MACSEC_RXSC_STATS_ATTR_PAD) ||
2232 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2233 sum.InPktsUnchecked,
2234 MACSEC_RXSC_STATS_ATTR_PAD) ||
2235 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2237 MACSEC_RXSC_STATS_ATTR_PAD) ||
2238 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2240 MACSEC_RXSC_STATS_ATTR_PAD) ||
2241 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2243 MACSEC_RXSC_STATS_ATTR_PAD) ||
2244 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2246 MACSEC_RXSC_STATS_ATTR_PAD) ||
2247 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2249 MACSEC_RXSC_STATS_ATTR_PAD) ||
2250 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2251 sum.InPktsNotUsingSA,
2252 MACSEC_RXSC_STATS_ATTR_PAD) ||
2253 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2255 MACSEC_RXSC_STATS_ATTR_PAD))
2261 static noinline_for_stack int
2262 copy_tx_sc_stats(struct sk_buff *skb, struct pcpu_tx_sc_stats __percpu *pstats)
2264 struct macsec_tx_sc_stats sum = {0, };
2267 for_each_possible_cpu(cpu) {
2268 const struct pcpu_tx_sc_stats *stats;
2269 struct macsec_tx_sc_stats tmp;
2272 stats = per_cpu_ptr(pstats, cpu);
2274 start = u64_stats_fetch_begin_irq(&stats->syncp);
2275 memcpy(&tmp, &stats->stats, sizeof(tmp));
2276 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2278 sum.OutPktsProtected += tmp.OutPktsProtected;
2279 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2280 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2281 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2284 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2285 sum.OutPktsProtected,
2286 MACSEC_TXSC_STATS_ATTR_PAD) ||
2287 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2288 sum.OutPktsEncrypted,
2289 MACSEC_TXSC_STATS_ATTR_PAD) ||
2290 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2291 sum.OutOctetsProtected,
2292 MACSEC_TXSC_STATS_ATTR_PAD) ||
2293 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2294 sum.OutOctetsEncrypted,
2295 MACSEC_TXSC_STATS_ATTR_PAD))
2301 static noinline_for_stack int
2302 copy_secy_stats(struct sk_buff *skb, struct pcpu_secy_stats __percpu *pstats)
2304 struct macsec_dev_stats sum = {0, };
2307 for_each_possible_cpu(cpu) {
2308 const struct pcpu_secy_stats *stats;
2309 struct macsec_dev_stats tmp;
2312 stats = per_cpu_ptr(pstats, cpu);
2314 start = u64_stats_fetch_begin_irq(&stats->syncp);
2315 memcpy(&tmp, &stats->stats, sizeof(tmp));
2316 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2318 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2319 sum.InPktsUntagged += tmp.InPktsUntagged;
2320 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2321 sum.InPktsNoTag += tmp.InPktsNoTag;
2322 sum.InPktsBadTag += tmp.InPktsBadTag;
2323 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2324 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2325 sum.InPktsOverrun += tmp.InPktsOverrun;
2328 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2329 sum.OutPktsUntagged,
2330 MACSEC_SECY_STATS_ATTR_PAD) ||
2331 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2333 MACSEC_SECY_STATS_ATTR_PAD) ||
2334 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2336 MACSEC_SECY_STATS_ATTR_PAD) ||
2337 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2339 MACSEC_SECY_STATS_ATTR_PAD) ||
2340 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2342 MACSEC_SECY_STATS_ATTR_PAD) ||
2343 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2344 sum.InPktsUnknownSCI,
2345 MACSEC_SECY_STATS_ATTR_PAD) ||
2346 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2348 MACSEC_SECY_STATS_ATTR_PAD) ||
2349 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2351 MACSEC_SECY_STATS_ATTR_PAD))
2357 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2359 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2360 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2367 switch (secy->key_len) {
2368 case MACSEC_GCM_AES_128_SAK_LEN:
2369 csid = MACSEC_DEFAULT_CIPHER_ID;
2371 case MACSEC_GCM_AES_256_SAK_LEN:
2372 csid = MACSEC_CIPHER_ID_GCM_AES_256;
2378 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2379 MACSEC_SECY_ATTR_PAD) ||
2380 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2381 csid, MACSEC_SECY_ATTR_PAD) ||
2382 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2383 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2384 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2385 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2386 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2387 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2388 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2389 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2390 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2391 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2394 if (secy->replay_protect) {
2395 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2399 nla_nest_end(skb, secy_nest);
2403 nla_nest_cancel(skb, secy_nest);
2407 static noinline_for_stack int
2408 dump_secy(struct macsec_secy *secy, struct net_device *dev,
2409 struct sk_buff *skb, struct netlink_callback *cb)
2411 struct macsec_rx_sc *rx_sc;
2412 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2413 struct nlattr *txsa_list, *rxsc_list;
2416 struct nlattr *attr;
2418 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2419 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2423 genl_dump_check_consistent(cb, hdr);
2425 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2426 goto nla_put_failure;
2428 if (nla_put_secy(secy, skb))
2429 goto nla_put_failure;
2431 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
2433 goto nla_put_failure;
2434 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2435 nla_nest_cancel(skb, attr);
2436 goto nla_put_failure;
2438 nla_nest_end(skb, attr);
2440 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
2442 goto nla_put_failure;
2443 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2444 nla_nest_cancel(skb, attr);
2445 goto nla_put_failure;
2447 nla_nest_end(skb, attr);
2449 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
2451 goto nla_put_failure;
2452 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2453 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2454 struct nlattr *txsa_nest;
2459 txsa_nest = nla_nest_start_noflag(skb, j++);
2461 nla_nest_cancel(skb, txsa_list);
2462 goto nla_put_failure;
2465 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2466 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
2467 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
2468 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2469 nla_nest_cancel(skb, txsa_nest);
2470 nla_nest_cancel(skb, txsa_list);
2471 goto nla_put_failure;
2474 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
2476 nla_nest_cancel(skb, txsa_nest);
2477 nla_nest_cancel(skb, txsa_list);
2478 goto nla_put_failure;
2480 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2481 nla_nest_cancel(skb, attr);
2482 nla_nest_cancel(skb, txsa_nest);
2483 nla_nest_cancel(skb, txsa_list);
2484 goto nla_put_failure;
2486 nla_nest_end(skb, attr);
2488 nla_nest_end(skb, txsa_nest);
2490 nla_nest_end(skb, txsa_list);
2492 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
2494 goto nla_put_failure;
2497 for_each_rxsc_rtnl(secy, rx_sc) {
2499 struct nlattr *rxsa_list;
2500 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
2503 nla_nest_cancel(skb, rxsc_list);
2504 goto nla_put_failure;
2507 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
2508 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2509 MACSEC_RXSC_ATTR_PAD)) {
2510 nla_nest_cancel(skb, rxsc_nest);
2511 nla_nest_cancel(skb, rxsc_list);
2512 goto nla_put_failure;
2515 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
2517 nla_nest_cancel(skb, rxsc_nest);
2518 nla_nest_cancel(skb, rxsc_list);
2519 goto nla_put_failure;
2521 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2522 nla_nest_cancel(skb, attr);
2523 nla_nest_cancel(skb, rxsc_nest);
2524 nla_nest_cancel(skb, rxsc_list);
2525 goto nla_put_failure;
2527 nla_nest_end(skb, attr);
2529 rxsa_list = nla_nest_start_noflag(skb,
2530 MACSEC_RXSC_ATTR_SA_LIST);
2532 nla_nest_cancel(skb, rxsc_nest);
2533 nla_nest_cancel(skb, rxsc_list);
2534 goto nla_put_failure;
2537 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2538 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2539 struct nlattr *rxsa_nest;
2544 rxsa_nest = nla_nest_start_noflag(skb, k++);
2546 nla_nest_cancel(skb, rxsa_list);
2547 nla_nest_cancel(skb, rxsc_nest);
2548 nla_nest_cancel(skb, rxsc_list);
2549 goto nla_put_failure;
2552 attr = nla_nest_start_noflag(skb,
2553 MACSEC_SA_ATTR_STATS);
2555 nla_nest_cancel(skb, rxsa_list);
2556 nla_nest_cancel(skb, rxsc_nest);
2557 nla_nest_cancel(skb, rxsc_list);
2558 goto nla_put_failure;
2560 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2561 nla_nest_cancel(skb, attr);
2562 nla_nest_cancel(skb, rxsa_list);
2563 nla_nest_cancel(skb, rxsc_nest);
2564 nla_nest_cancel(skb, rxsc_list);
2565 goto nla_put_failure;
2567 nla_nest_end(skb, attr);
2569 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2570 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
2571 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
2572 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2573 nla_nest_cancel(skb, rxsa_nest);
2574 nla_nest_cancel(skb, rxsc_nest);
2575 nla_nest_cancel(skb, rxsc_list);
2576 goto nla_put_failure;
2578 nla_nest_end(skb, rxsa_nest);
2581 nla_nest_end(skb, rxsa_list);
2582 nla_nest_end(skb, rxsc_nest);
2585 nla_nest_end(skb, rxsc_list);
2587 genlmsg_end(skb, hdr);
2592 genlmsg_cancel(skb, hdr);
2596 static int macsec_generation = 1; /* protected by RTNL */
2598 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2600 struct net *net = sock_net(skb->sk);
2601 struct net_device *dev;
2604 dev_idx = cb->args[0];
2609 cb->seq = macsec_generation;
2611 for_each_netdev(net, dev) {
2612 struct macsec_secy *secy;
2617 if (!netif_is_macsec(dev))
2620 secy = &macsec_priv(dev)->secy;
2621 if (dump_secy(secy, dev, skb, cb) < 0)
2633 static const struct genl_ops macsec_genl_ops[] = {
2635 .cmd = MACSEC_CMD_GET_TXSC,
2636 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2637 .dumpit = macsec_dump_txsc,
2640 .cmd = MACSEC_CMD_ADD_RXSC,
2641 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2642 .doit = macsec_add_rxsc,
2643 .flags = GENL_ADMIN_PERM,
2646 .cmd = MACSEC_CMD_DEL_RXSC,
2647 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2648 .doit = macsec_del_rxsc,
2649 .flags = GENL_ADMIN_PERM,
2652 .cmd = MACSEC_CMD_UPD_RXSC,
2653 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2654 .doit = macsec_upd_rxsc,
2655 .flags = GENL_ADMIN_PERM,
2658 .cmd = MACSEC_CMD_ADD_TXSA,
2659 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2660 .doit = macsec_add_txsa,
2661 .flags = GENL_ADMIN_PERM,
2664 .cmd = MACSEC_CMD_DEL_TXSA,
2665 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2666 .doit = macsec_del_txsa,
2667 .flags = GENL_ADMIN_PERM,
2670 .cmd = MACSEC_CMD_UPD_TXSA,
2671 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2672 .doit = macsec_upd_txsa,
2673 .flags = GENL_ADMIN_PERM,
2676 .cmd = MACSEC_CMD_ADD_RXSA,
2677 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2678 .doit = macsec_add_rxsa,
2679 .flags = GENL_ADMIN_PERM,
2682 .cmd = MACSEC_CMD_DEL_RXSA,
2683 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2684 .doit = macsec_del_rxsa,
2685 .flags = GENL_ADMIN_PERM,
2688 .cmd = MACSEC_CMD_UPD_RXSA,
2689 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2690 .doit = macsec_upd_rxsa,
2691 .flags = GENL_ADMIN_PERM,
2695 static struct genl_family macsec_fam __ro_after_init = {
2696 .name = MACSEC_GENL_NAME,
2698 .version = MACSEC_GENL_VERSION,
2699 .maxattr = MACSEC_ATTR_MAX,
2700 .policy = macsec_genl_policy,
2702 .module = THIS_MODULE,
2703 .ops = macsec_genl_ops,
2704 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2707 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2708 struct net_device *dev)
2710 struct macsec_dev *macsec = netdev_priv(dev);
2711 struct macsec_secy *secy = &macsec->secy;
2712 struct pcpu_secy_stats *secy_stats;
2716 if (!secy->protect_frames) {
2717 secy_stats = this_cpu_ptr(macsec->stats);
2718 u64_stats_update_begin(&secy_stats->syncp);
2719 secy_stats->stats.OutPktsUntagged++;
2720 u64_stats_update_end(&secy_stats->syncp);
2721 skb->dev = macsec->real_dev;
2723 ret = dev_queue_xmit(skb);
2724 count_tx(dev, ret, len);
2728 if (!secy->operational) {
2730 dev->stats.tx_dropped++;
2731 return NETDEV_TX_OK;
2734 skb = macsec_encrypt(skb, dev);
2736 if (PTR_ERR(skb) != -EINPROGRESS)
2737 dev->stats.tx_dropped++;
2738 return NETDEV_TX_OK;
2741 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2743 macsec_encrypt_finish(skb, dev);
2745 ret = dev_queue_xmit(skb);
2746 count_tx(dev, ret, len);
2750 #define MACSEC_FEATURES \
2751 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2753 static int macsec_dev_init(struct net_device *dev)
2755 struct macsec_dev *macsec = macsec_priv(dev);
2756 struct net_device *real_dev = macsec->real_dev;
2759 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2763 err = gro_cells_init(&macsec->gro_cells, dev);
2765 free_percpu(dev->tstats);
2769 dev->features = real_dev->features & MACSEC_FEATURES;
2770 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2772 dev->needed_headroom = real_dev->needed_headroom +
2773 MACSEC_NEEDED_HEADROOM;
2774 dev->needed_tailroom = real_dev->needed_tailroom +
2775 MACSEC_NEEDED_TAILROOM;
2777 if (is_zero_ether_addr(dev->dev_addr))
2778 eth_hw_addr_inherit(dev, real_dev);
2779 if (is_zero_ether_addr(dev->broadcast))
2780 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2785 static void macsec_dev_uninit(struct net_device *dev)
2787 struct macsec_dev *macsec = macsec_priv(dev);
2789 gro_cells_destroy(&macsec->gro_cells);
2790 free_percpu(dev->tstats);
2793 static netdev_features_t macsec_fix_features(struct net_device *dev,
2794 netdev_features_t features)
2796 struct macsec_dev *macsec = macsec_priv(dev);
2797 struct net_device *real_dev = macsec->real_dev;
2799 features &= (real_dev->features & MACSEC_FEATURES) |
2800 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2801 features |= NETIF_F_LLTX;
2806 static int macsec_dev_open(struct net_device *dev)
2808 struct macsec_dev *macsec = macsec_priv(dev);
2809 struct net_device *real_dev = macsec->real_dev;
2812 err = dev_uc_add(real_dev, dev->dev_addr);
2816 if (dev->flags & IFF_ALLMULTI) {
2817 err = dev_set_allmulti(real_dev, 1);
2822 if (dev->flags & IFF_PROMISC) {
2823 err = dev_set_promiscuity(real_dev, 1);
2825 goto clear_allmulti;
2828 if (netif_carrier_ok(real_dev))
2829 netif_carrier_on(dev);
2833 if (dev->flags & IFF_ALLMULTI)
2834 dev_set_allmulti(real_dev, -1);
2836 dev_uc_del(real_dev, dev->dev_addr);
2837 netif_carrier_off(dev);
2841 static int macsec_dev_stop(struct net_device *dev)
2843 struct macsec_dev *macsec = macsec_priv(dev);
2844 struct net_device *real_dev = macsec->real_dev;
2846 netif_carrier_off(dev);
2848 dev_mc_unsync(real_dev, dev);
2849 dev_uc_unsync(real_dev, dev);
2851 if (dev->flags & IFF_ALLMULTI)
2852 dev_set_allmulti(real_dev, -1);
2854 if (dev->flags & IFF_PROMISC)
2855 dev_set_promiscuity(real_dev, -1);
2857 dev_uc_del(real_dev, dev->dev_addr);
2862 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2864 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2866 if (!(dev->flags & IFF_UP))
2869 if (change & IFF_ALLMULTI)
2870 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2872 if (change & IFF_PROMISC)
2873 dev_set_promiscuity(real_dev,
2874 dev->flags & IFF_PROMISC ? 1 : -1);
2877 static void macsec_dev_set_rx_mode(struct net_device *dev)
2879 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2881 dev_mc_sync(real_dev, dev);
2882 dev_uc_sync(real_dev, dev);
2885 static int macsec_set_mac_address(struct net_device *dev, void *p)
2887 struct macsec_dev *macsec = macsec_priv(dev);
2888 struct net_device *real_dev = macsec->real_dev;
2889 struct sockaddr *addr = p;
2892 if (!is_valid_ether_addr(addr->sa_data))
2893 return -EADDRNOTAVAIL;
2895 if (!(dev->flags & IFF_UP))
2898 err = dev_uc_add(real_dev, addr->sa_data);
2902 dev_uc_del(real_dev, dev->dev_addr);
2905 ether_addr_copy(dev->dev_addr, addr->sa_data);
2909 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2911 struct macsec_dev *macsec = macsec_priv(dev);
2912 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2914 if (macsec->real_dev->mtu - extra < new_mtu)
2922 static void macsec_get_stats64(struct net_device *dev,
2923 struct rtnl_link_stats64 *s)
2930 for_each_possible_cpu(cpu) {
2931 struct pcpu_sw_netstats *stats;
2932 struct pcpu_sw_netstats tmp;
2935 stats = per_cpu_ptr(dev->tstats, cpu);
2937 start = u64_stats_fetch_begin_irq(&stats->syncp);
2938 tmp.rx_packets = stats->rx_packets;
2939 tmp.rx_bytes = stats->rx_bytes;
2940 tmp.tx_packets = stats->tx_packets;
2941 tmp.tx_bytes = stats->tx_bytes;
2942 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2944 s->rx_packets += tmp.rx_packets;
2945 s->rx_bytes += tmp.rx_bytes;
2946 s->tx_packets += tmp.tx_packets;
2947 s->tx_bytes += tmp.tx_bytes;
2950 s->rx_dropped = dev->stats.rx_dropped;
2951 s->tx_dropped = dev->stats.tx_dropped;
2954 static int macsec_get_iflink(const struct net_device *dev)
2956 return macsec_priv(dev)->real_dev->ifindex;
2959 static const struct net_device_ops macsec_netdev_ops = {
2960 .ndo_init = macsec_dev_init,
2961 .ndo_uninit = macsec_dev_uninit,
2962 .ndo_open = macsec_dev_open,
2963 .ndo_stop = macsec_dev_stop,
2964 .ndo_fix_features = macsec_fix_features,
2965 .ndo_change_mtu = macsec_change_mtu,
2966 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2967 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2968 .ndo_set_mac_address = macsec_set_mac_address,
2969 .ndo_start_xmit = macsec_start_xmit,
2970 .ndo_get_stats64 = macsec_get_stats64,
2971 .ndo_get_iflink = macsec_get_iflink,
2974 static const struct device_type macsec_type = {
2978 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2979 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2980 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2981 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2982 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2983 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2984 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2985 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2986 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2987 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2988 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2989 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2990 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2993 static void macsec_free_netdev(struct net_device *dev)
2995 struct macsec_dev *macsec = macsec_priv(dev);
2997 free_percpu(macsec->stats);
2998 free_percpu(macsec->secy.tx_sc.stats);
3002 static void macsec_setup(struct net_device *dev)
3006 dev->max_mtu = ETH_MAX_MTU;
3007 dev->priv_flags |= IFF_NO_QUEUE;
3008 dev->netdev_ops = &macsec_netdev_ops;
3009 dev->needs_free_netdev = true;
3010 dev->priv_destructor = macsec_free_netdev;
3011 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3013 eth_zero_addr(dev->broadcast);
3016 static int macsec_changelink_common(struct net_device *dev,
3017 struct nlattr *data[])
3019 struct macsec_secy *secy;
3020 struct macsec_tx_sc *tx_sc;
3022 secy = &macsec_priv(dev)->secy;
3023 tx_sc = &secy->tx_sc;
3025 if (data[IFLA_MACSEC_ENCODING_SA]) {
3026 struct macsec_tx_sa *tx_sa;
3028 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3029 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3031 secy->operational = tx_sa && tx_sa->active;
3034 if (data[IFLA_MACSEC_WINDOW])
3035 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3037 if (data[IFLA_MACSEC_ENCRYPT])
3038 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3040 if (data[IFLA_MACSEC_PROTECT])
3041 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3043 if (data[IFLA_MACSEC_INC_SCI])
3044 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3046 if (data[IFLA_MACSEC_ES])
3047 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3049 if (data[IFLA_MACSEC_SCB])
3050 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3052 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3053 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3055 if (data[IFLA_MACSEC_VALIDATION])
3056 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3058 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3059 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3060 case MACSEC_CIPHER_ID_GCM_AES_128:
3061 case MACSEC_DEFAULT_CIPHER_ID:
3062 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3064 case MACSEC_CIPHER_ID_GCM_AES_256:
3065 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3075 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3076 struct nlattr *data[],
3077 struct netlink_ext_ack *extack)
3082 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3083 data[IFLA_MACSEC_ICV_LEN] ||
3084 data[IFLA_MACSEC_SCI] ||
3085 data[IFLA_MACSEC_PORT])
3088 return macsec_changelink_common(dev, data);
3091 static void macsec_del_dev(struct macsec_dev *macsec)
3095 while (macsec->secy.rx_sc) {
3096 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3098 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3102 for (i = 0; i < MACSEC_NUM_AN; i++) {
3103 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3106 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3112 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3114 struct macsec_dev *macsec = macsec_priv(dev);
3115 struct net_device *real_dev = macsec->real_dev;
3117 unregister_netdevice_queue(dev, head);
3118 list_del_rcu(&macsec->secys);
3119 macsec_del_dev(macsec);
3120 netdev_upper_dev_unlink(real_dev, dev);
3122 macsec_generation++;
3125 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3127 struct macsec_dev *macsec = macsec_priv(dev);
3128 struct net_device *real_dev = macsec->real_dev;
3129 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3131 macsec_common_dellink(dev, head);
3133 if (list_empty(&rxd->secys)) {
3134 netdev_rx_handler_unregister(real_dev);
3139 static int register_macsec_dev(struct net_device *real_dev,
3140 struct net_device *dev)
3142 struct macsec_dev *macsec = macsec_priv(dev);
3143 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3148 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3152 INIT_LIST_HEAD(&rxd->secys);
3154 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3162 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3166 static bool sci_exists(struct net_device *dev, sci_t sci)
3168 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3169 struct macsec_dev *macsec;
3171 list_for_each_entry(macsec, &rxd->secys, secys) {
3172 if (macsec->secy.sci == sci)
3179 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3181 return make_sci(dev->dev_addr, port);
3184 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3186 struct macsec_dev *macsec = macsec_priv(dev);
3187 struct macsec_secy *secy = &macsec->secy;
3189 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3193 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3194 if (!secy->tx_sc.stats) {
3195 free_percpu(macsec->stats);
3199 if (sci == MACSEC_UNDEF_SCI)
3200 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3203 secy->operational = true;
3204 secy->key_len = DEFAULT_SAK_LEN;
3205 secy->icv_len = icv_len;
3206 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3207 secy->protect_frames = true;
3208 secy->replay_protect = false;
3211 secy->tx_sc.active = true;
3212 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3213 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3214 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3215 secy->tx_sc.end_station = false;
3216 secy->tx_sc.scb = false;
3221 static int macsec_newlink(struct net *net, struct net_device *dev,
3222 struct nlattr *tb[], struct nlattr *data[],
3223 struct netlink_ext_ack *extack)
3225 struct macsec_dev *macsec = macsec_priv(dev);
3226 struct net_device *real_dev;
3229 u8 icv_len = DEFAULT_ICV_LEN;
3230 rx_handler_func_t *rx_handler;
3234 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3238 dev->priv_flags |= IFF_MACSEC;
3240 macsec->real_dev = real_dev;
3242 if (data && data[IFLA_MACSEC_ICV_LEN])
3243 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3244 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3246 rx_handler = rtnl_dereference(real_dev->rx_handler);
3247 if (rx_handler && rx_handler != macsec_handle_frame)
3250 err = register_netdevice(dev);
3254 err = netdev_upper_dev_link(real_dev, dev, extack);
3258 /* need to be already registered so that ->init has run and
3259 * the MAC addr is set
3261 if (data && data[IFLA_MACSEC_SCI])
3262 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3263 else if (data && data[IFLA_MACSEC_PORT])
3264 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3266 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3268 if (rx_handler && sci_exists(real_dev, sci)) {
3273 err = macsec_add_dev(dev, sci, icv_len);
3278 err = macsec_changelink_common(dev, data);
3283 err = register_macsec_dev(real_dev, dev);
3287 netif_stacked_transfer_operstate(real_dev, dev);
3288 linkwatch_fire_event(dev);
3290 macsec_generation++;
3295 macsec_del_dev(macsec);
3297 netdev_upper_dev_unlink(real_dev, dev);
3299 unregister_netdevice(dev);
3303 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
3304 struct netlink_ext_ack *extack)
3306 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
3307 u8 icv_len = DEFAULT_ICV_LEN;
3314 if (data[IFLA_MACSEC_CIPHER_SUITE])
3315 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3317 if (data[IFLA_MACSEC_ICV_LEN]) {
3318 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3319 if (icv_len != DEFAULT_ICV_LEN) {
3320 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3321 struct crypto_aead *dummy_tfm;
3323 dummy_tfm = macsec_alloc_tfm(dummy_key,
3326 if (IS_ERR(dummy_tfm))
3327 return PTR_ERR(dummy_tfm);
3328 crypto_free_aead(dummy_tfm);
3333 case MACSEC_CIPHER_ID_GCM_AES_128:
3334 case MACSEC_CIPHER_ID_GCM_AES_256:
3335 case MACSEC_DEFAULT_CIPHER_ID:
3336 if (icv_len < MACSEC_MIN_ICV_LEN ||
3337 icv_len > MACSEC_STD_ICV_LEN)
3344 if (data[IFLA_MACSEC_ENCODING_SA]) {
3345 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3349 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3350 flag < IFLA_MACSEC_VALIDATION;
3353 if (nla_get_u8(data[flag]) > 1)
3358 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3359 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3360 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3362 if ((sci && (scb || es)) || (scb && es))
3365 if (data[IFLA_MACSEC_VALIDATION] &&
3366 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3369 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3370 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
3371 !data[IFLA_MACSEC_WINDOW])
3377 static struct net *macsec_get_link_net(const struct net_device *dev)
3379 return dev_net(macsec_priv(dev)->real_dev);
3382 static size_t macsec_get_size(const struct net_device *dev)
3384 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3385 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3386 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3387 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3388 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3389 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3390 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3391 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3392 nla_total_size(1) + /* IFLA_MACSEC_ES */
3393 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3394 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3395 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
3399 static int macsec_fill_info(struct sk_buff *skb,
3400 const struct net_device *dev)
3402 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3403 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3406 switch (secy->key_len) {
3407 case MACSEC_GCM_AES_128_SAK_LEN:
3408 csid = MACSEC_DEFAULT_CIPHER_ID;
3410 case MACSEC_GCM_AES_256_SAK_LEN:
3411 csid = MACSEC_CIPHER_ID_GCM_AES_256;
3414 goto nla_put_failure;
3417 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3419 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
3420 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
3421 csid, IFLA_MACSEC_PAD) ||
3422 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3423 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3424 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3425 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3426 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3427 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3428 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3429 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3431 goto nla_put_failure;
3433 if (secy->replay_protect) {
3434 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3435 goto nla_put_failure;
3444 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3446 .priv_size = sizeof(struct macsec_dev),
3447 .maxtype = IFLA_MACSEC_MAX,
3448 .policy = macsec_rtnl_policy,
3449 .setup = macsec_setup,
3450 .validate = macsec_validate_attr,
3451 .newlink = macsec_newlink,
3452 .changelink = macsec_changelink,
3453 .dellink = macsec_dellink,
3454 .get_size = macsec_get_size,
3455 .fill_info = macsec_fill_info,
3456 .get_link_net = macsec_get_link_net,
3459 static bool is_macsec_master(struct net_device *dev)
3461 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3464 static int macsec_notify(struct notifier_block *this, unsigned long event,
3467 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3470 if (!is_macsec_master(real_dev))
3476 case NETDEV_CHANGE: {
3477 struct macsec_dev *m, *n;
3478 struct macsec_rxh_data *rxd;
3480 rxd = macsec_data_rtnl(real_dev);
3481 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3482 struct net_device *dev = m->secy.netdev;
3484 netif_stacked_transfer_operstate(real_dev, dev);
3488 case NETDEV_UNREGISTER: {
3489 struct macsec_dev *m, *n;
3490 struct macsec_rxh_data *rxd;
3492 rxd = macsec_data_rtnl(real_dev);
3493 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3494 macsec_common_dellink(m->secy.netdev, &head);
3497 netdev_rx_handler_unregister(real_dev);
3500 unregister_netdevice_many(&head);
3503 case NETDEV_CHANGEMTU: {
3504 struct macsec_dev *m;
3505 struct macsec_rxh_data *rxd;
3507 rxd = macsec_data_rtnl(real_dev);
3508 list_for_each_entry(m, &rxd->secys, secys) {
3509 struct net_device *dev = m->secy.netdev;
3510 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3511 macsec_extra_len(true));
3514 dev_set_mtu(dev, mtu);
3522 static struct notifier_block macsec_notifier = {
3523 .notifier_call = macsec_notify,
3526 static int __init macsec_init(void)
3530 pr_info("MACsec IEEE 802.1AE\n");
3531 err = register_netdevice_notifier(&macsec_notifier);
3535 err = rtnl_link_register(&macsec_link_ops);
3539 err = genl_register_family(&macsec_fam);
3546 rtnl_link_unregister(&macsec_link_ops);
3548 unregister_netdevice_notifier(&macsec_notifier);
3552 static void __exit macsec_exit(void)
3554 genl_unregister_family(&macsec_fam);
3555 rtnl_link_unregister(&macsec_link_ops);
3556 unregister_netdevice_notifier(&macsec_notifier);
3560 module_init(macsec_init);
3561 module_exit(macsec_exit);
3563 MODULE_ALIAS_RTNL_LINK("macsec");
3564 MODULE_ALIAS_GENL_FAMILY("macsec");
3566 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3567 MODULE_LICENSE("GPL v2");