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2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
c09440f7
SD		 2/*
3 * drivers/net/macsec.c - MACsec device
4 *
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
c09440f7
SD		 6 */
7
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>
3cf3227a 14#include <linux/netdevice.h>
c09440f7 15#include <linux/rtnetlink.h>
e187246f 16#include <linux/refcount.h>
c09440f7
SD		 17#include <net/genetlink.h>
18#include <net/sock.h>
5491e7c6 19#include <net/gro_cells.h>
c0e4eadf 20#include <net/macsec.h>
3cf3227a 21#include <linux/phy.h>
a21ecf0e 22#include <linux/byteorder/generic.h>
b06d072c 23#include <linux/if_arp.h>
c09440f7
SD		 24
25#include <uapi/linux/if_macsec.h>
26
c09440f7
SD		 27#define MACSEC_SCI_LEN 8
28
29/* SecTAG length = macsec_eth_header without the optional SCI */
30#define MACSEC_TAG_LEN 6
31
32struct macsec_eth_header {
33 struct ethhdr eth;
34 /* SecTAG */
35 u8 tci_an;
36#if defined(__LITTLE_ENDIAN_BITFIELD)
37 u8 short_length:6,
38 unused:2;
39#elif defined(__BIG_ENDIAN_BITFIELD)
40 u8 unused:2,
41 short_length:6;
42#else
43#error "Please fix <asm/byteorder.h>"
44#endif
45 __be32 packet_number;
46 u8 secure_channel_id[8]; /* optional */
47} __packed;
48
49#define MACSEC_TCI_VERSION 0x80
50#define MACSEC_TCI_ES 0x40 /* end station */
51#define MACSEC_TCI_SC 0x20 /* SCI present */
52#define MACSEC_TCI_SCB 0x10 /* epon */
53#define MACSEC_TCI_E 0x08 /* encryption */
54#define MACSEC_TCI_C 0x04 /* changed text */
55#define MACSEC_AN_MASK 0x03 /* association number */
56#define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
57
58/* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59#define MIN_NON_SHORT_LEN 48
60
61#define GCM_AES_IV_LEN 12
62#define DEFAULT_ICV_LEN 16
63
7979472b 64#define for_each_rxsc(secy, sc) \
c09440f7 65 for (sc = rcu_dereference_bh(secy->rx_sc); \
7979472b 66 sc; \
c09440f7
SD		 67 sc = rcu_dereference_bh(sc->next))
68#define for_each_rxsc_rtnl(secy, sc) \
69 for (sc = rtnl_dereference(secy->rx_sc); \
70 sc; \
71 sc = rtnl_dereference(sc->next))
72
a21ecf0e
EM		 73#define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
74
75struct gcm_iv_xpn {
76 union {
77 u8 short_secure_channel_id[4];
78 ssci_t ssci;
79 };
80 __be64 pn;
81} __packed;
82
c09440f7
SD		 83struct gcm_iv {
84 union {
85 u8 secure_channel_id[8];
86 sci_t sci;
87 };
88 __be32 pn;
89};
90
c09440f7
SD		 91#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
92
c09440f7
SD		 93struct pcpu_secy_stats {
94 struct macsec_dev_stats stats;
95 struct u64_stats_sync syncp;
96};
97
98/**
99 * struct macsec_dev - private data
100 * @secy: SecY config
101 * @real_dev: pointer to underlying netdevice
102 * @stats: MACsec device stats
103 * @secys: linked list of SecY's on the underlying device
3cf3227a 104 * @offload: status of offloading on the MACsec device
c09440f7
SD		 105 */
106struct macsec_dev {
107 struct macsec_secy secy;
108 struct net_device *real_dev;
109 struct pcpu_secy_stats __percpu *stats;
110 struct list_head secys;
5491e7c6 111 struct gro_cells gro_cells;
3cf3227a 112 enum macsec_offload offload;
c09440f7
SD		 113};
114
115/**
116 * struct macsec_rxh_data - rx_handler private argument
117 * @secys: linked list of SecY's on this underlying device
118 */
119struct macsec_rxh_data {
120 struct list_head secys;
121};
122
123static struct macsec_dev *macsec_priv(const struct net_device *dev)
124{
125 return (struct macsec_dev *)netdev_priv(dev);
126}
127
128static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
129{
130 return rcu_dereference_bh(dev->rx_handler_data);
131}
132
133static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
134{
135 return rtnl_dereference(dev->rx_handler_data);
136}
137
138struct macsec_cb {
139 struct aead_request *req;
140 union {
141 struct macsec_tx_sa *tx_sa;
142 struct macsec_rx_sa *rx_sa;
143 };
144 u8 assoc_num;
145 bool valid;
146 bool has_sci;
147};
148
149static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
150{
151 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
152
153 if (!sa || !sa->active)
154 return NULL;
155
e187246f 156 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 157 return NULL;
158
159 return sa;
160}
161
162static void free_rx_sc_rcu(struct rcu_head *head)
163{
164 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
165
166 free_percpu(rx_sc->stats);
167 kfree(rx_sc);
168}
169
170static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
171{
8676d76f 172 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
c09440f7
SD		 173}
174
175static void macsec_rxsc_put(struct macsec_rx_sc *sc)
176{
8676d76f 177 if (refcount_dec_and_test(&sc->refcnt))
c09440f7
SD		 178 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
179}
180
181static void free_rxsa(struct rcu_head *head)
182{
183 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
184
185 crypto_free_aead(sa->key.tfm);
186 free_percpu(sa->stats);
c09440f7
SD		 187 kfree(sa);
188}
189
190static void macsec_rxsa_put(struct macsec_rx_sa *sa)
191{
e187246f 192 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 193 call_rcu(&sa->rcu, free_rxsa);
194}
195
196static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
197{
198 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
199
200 if (!sa || !sa->active)
201 return NULL;
202
28206cdb 203 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 204 return NULL;
205
206 return sa;
207}
208
209static void free_txsa(struct rcu_head *head)
210{
211 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
212
213 crypto_free_aead(sa->key.tfm);
214 free_percpu(sa->stats);
215 kfree(sa);
216}
217
218static void macsec_txsa_put(struct macsec_tx_sa *sa)
219{
28206cdb 220 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 221 call_rcu(&sa->rcu, free_txsa);
222}
223
224static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
225{
226 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
227 return (struct macsec_cb *)skb->cb;
228}
229
230#define MACSEC_PORT_ES (htons(0x0001))
231#define MACSEC_PORT_SCB (0x0000)
232#define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
48ef50fa 233#define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
c09440f7 234
ccfdec90
FW		 235#define MACSEC_GCM_AES_128_SAK_LEN 16
236#define MACSEC_GCM_AES_256_SAK_LEN 32
237
ccfdec90 238#define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
48ef50fa 239#define DEFAULT_XPN false
c09440f7
SD		 240#define DEFAULT_SEND_SCI true
241#define DEFAULT_ENCRYPT false
242#define DEFAULT_ENCODING_SA 0
243
e0f841f5
TB		 244static bool send_sci(const struct macsec_secy *secy)
245{
246 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
247
248 return tx_sc->send_sci ||
249 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
250}
251
c09440f7
SD		 252static sci_t make_sci(u8 *addr, __be16 port)
253{
254 sci_t sci;
255
256 memcpy(&sci, addr, ETH_ALEN);
257 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
258
259 return sci;
260}
261
262static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
263{
264 sci_t sci;
265
266 if (sci_present)
267 memcpy(&sci, hdr->secure_channel_id,
268 sizeof(hdr->secure_channel_id));
269 else
270 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
271
272 return sci;
273}
274
275static unsigned int macsec_sectag_len(bool sci_present)
276{
277 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
278}
279
280static unsigned int macsec_hdr_len(bool sci_present)
281{
282 return macsec_sectag_len(sci_present) + ETH_HLEN;
283}
284
285static unsigned int macsec_extra_len(bool sci_present)
286{
287 return macsec_sectag_len(sci_present) + sizeof(__be16);
288}
289
290/* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
291static void macsec_fill_sectag(struct macsec_eth_header *h,
e0f841f5
TB		 292 const struct macsec_secy *secy, u32 pn,
293 bool sci_present)
c09440f7
SD		 294{
295 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
296
e0f841f5 297 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
c09440f7
SD		 298 h->eth.h_proto = htons(ETH_P_MACSEC);
299
e0f841f5 300 if (sci_present) {
c09440f7
SD		 301 h->tci_an |= MACSEC_TCI_SC;
302 memcpy(&h->secure_channel_id, &secy->sci,
303 sizeof(h->secure_channel_id));
304 } else {
305 if (tx_sc->end_station)
306 h->tci_an |= MACSEC_TCI_ES;
307 if (tx_sc->scb)
308 h->tci_an |= MACSEC_TCI_SCB;
309 }
310
311 h->packet_number = htonl(pn);
312
313 /* with GCM, C/E clear for !encrypt, both set for encrypt */
314 if (tx_sc->encrypt)
315 h->tci_an |= MACSEC_TCI_CONFID;
316 else if (secy->icv_len != DEFAULT_ICV_LEN)
317 h->tci_an |= MACSEC_TCI_C;
318
319 h->tci_an |= tx_sc->encoding_sa;
320}
321
322static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
323{
324 if (data_len < MIN_NON_SHORT_LEN)
325 h->short_length = data_len;
326}
327
3cf3227a
AT		 328/* Checks if a MACsec interface is being offloaded to an hardware engine */
329static bool macsec_is_offloaded(struct macsec_dev *macsec)
330{
21114b7f
AT		 331 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
332 macsec->offload == MACSEC_OFFLOAD_PHY)
3cf3227a
AT		 333 return true;
334
335 return false;
336}
337
338/* Checks if underlying layers implement MACsec offloading functions. */
339static bool macsec_check_offload(enum macsec_offload offload,
340 struct macsec_dev *macsec)
341{
342 if (!macsec || !macsec->real_dev)
343 return false;
344
345 if (offload == MACSEC_OFFLOAD_PHY)
346 return macsec->real_dev->phydev &&
347 macsec->real_dev->phydev->macsec_ops;
21114b7f
AT		 348 else if (offload == MACSEC_OFFLOAD_MAC)
349 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
350 macsec->real_dev->macsec_ops;
3cf3227a
AT		 351
352 return false;
353}
354
355static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
356 struct macsec_dev *macsec,
357 struct macsec_context *ctx)
358{
359 if (ctx) {
360 memset(ctx, 0, sizeof(*ctx));
361 ctx->offload = offload;
362
363 if (offload == MACSEC_OFFLOAD_PHY)
364 ctx->phydev = macsec->real_dev->phydev;
21114b7f
AT		 365 else if (offload == MACSEC_OFFLOAD_MAC)
366 ctx->netdev = macsec->real_dev;
3cf3227a
AT		 367 }
368
21114b7f
AT		 369 if (offload == MACSEC_OFFLOAD_PHY)
370 return macsec->real_dev->phydev->macsec_ops;
371 else
372 return macsec->real_dev->macsec_ops;
3cf3227a
AT		 373}
374
375/* Returns a pointer to the MACsec ops struct if any and updates the MACsec
376 * context device reference if provided.
377 */
378static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
379 struct macsec_context *ctx)
380{
381 if (!macsec_check_offload(macsec->offload, macsec))
382 return NULL;
383
384 return __macsec_get_ops(macsec->offload, macsec, ctx);
385}
386
a21ecf0e
EM		 387/* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
388static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
c09440f7
SD		 389{
390 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
391 int len = skb->len - 2 * ETH_ALEN;
392 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
393
394 /* a) It comprises at least 17 octets */
395 if (skb->len <= 16)
396 return false;
397
398 /* b) MACsec EtherType: already checked */
399
400 /* c) V bit is clear */
401 if (h->tci_an & MACSEC_TCI_VERSION)
402 return false;
403
404 /* d) ES or SCB => !SC */
405 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
406 (h->tci_an & MACSEC_TCI_SC))
407 return false;
408
409 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
410 if (h->unused)
411 return false;
412
a21ecf0e
EM		 413 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
414 if (!h->packet_number && !xpn)
c09440f7
SD		 415 return false;
416
417 /* length check, f) g) h) i) */
418 if (h->short_length)
419 return len == extra_len + h->short_length;
420 return len >= extra_len + MIN_NON_SHORT_LEN;
421}
422
423#define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
2ccbe2cb 424#define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
c09440f7 425
a21ecf0e
EM		 426static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
427 salt_t salt)
428{
429 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
430
431 gcm_iv->ssci = ssci ^ salt.ssci;
432 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
433}
434
c09440f7
SD		 435static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
436{
437 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
438
439 gcm_iv->sci = sci;
440 gcm_iv->pn = htonl(pn);
441}
442
443static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
444{
445 return (struct macsec_eth_header *)skb_mac_header(skb);
446}
447
6fc498bc
DB		 448static sci_t dev_to_sci(struct net_device *dev, __be16 port)
449{
450 return make_sci(dev->dev_addr, port);
451}
452
5c937de7
AT		 453static void __macsec_pn_wrapped(struct macsec_secy *secy,
454 struct macsec_tx_sa *tx_sa)
455{
456 pr_debug("PN wrapped, transitioning to !oper\n");
457 tx_sa->active = false;
458 if (secy->protect_frames)
459 secy->operational = false;
460}
461
462void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
463{
464 spin_lock_bh(&tx_sa->lock);
465 __macsec_pn_wrapped(secy, tx_sa);
466 spin_unlock_bh(&tx_sa->lock);
467}
468EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
469
a21ecf0e
EM		 470static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
471 struct macsec_secy *secy)
c09440f7 472{
a21ecf0e 473 pn_t pn;
c09440f7
SD		 474
475 spin_lock_bh(&tx_sa->lock);
c09440f7 476
a21ecf0e
EM		 477 pn = tx_sa->next_pn_halves;
478 if (secy->xpn)
479 tx_sa->next_pn++;
480 else
481 tx_sa->next_pn_halves.lower++;
482
5c937de7
AT		 483 if (tx_sa->next_pn == 0)
484 __macsec_pn_wrapped(secy, tx_sa);
c09440f7
SD		 485 spin_unlock_bh(&tx_sa->lock);
486
487 return pn;
488}
489
490static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
491{
492 struct macsec_dev *macsec = netdev_priv(dev);
493
494 skb->dev = macsec->real_dev;
495 skb_reset_mac_header(skb);
496 skb->protocol = eth_hdr(skb)->h_proto;
497}
498
499static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
500 struct macsec_tx_sa *tx_sa)
501{
502 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
503
504 u64_stats_update_begin(&txsc_stats->syncp);
505 if (tx_sc->encrypt) {
506 txsc_stats->stats.OutOctetsEncrypted += skb->len;
507 txsc_stats->stats.OutPktsEncrypted++;
508 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
509 } else {
510 txsc_stats->stats.OutOctetsProtected += skb->len;
511 txsc_stats->stats.OutPktsProtected++;
512 this_cpu_inc(tx_sa->stats->OutPktsProtected);
513 }
514 u64_stats_update_end(&txsc_stats->syncp);
515}
516
517static void count_tx(struct net_device *dev, int ret, int len)
518{
519 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
520 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
521
522 u64_stats_update_begin(&stats->syncp);
523 stats->tx_packets++;
524 stats->tx_bytes += len;
525 u64_stats_update_end(&stats->syncp);
c09440f7
SD		 526 }
527}
528
529static void macsec_encrypt_done(struct crypto_async_request *base, int err)
530{
531 struct sk_buff *skb = base->data;
532 struct net_device *dev = skb->dev;
533 struct macsec_dev *macsec = macsec_priv(dev);
534 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
535 int len, ret;
536
537 aead_request_free(macsec_skb_cb(skb)->req);
538
539 rcu_read_lock_bh();
540 macsec_encrypt_finish(skb, dev);
541 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
542 len = skb->len;
543 ret = dev_queue_xmit(skb);
544 count_tx(dev, ret, len);
545 rcu_read_unlock_bh();
546
547 macsec_txsa_put(sa);
548 dev_put(dev);
549}
550
5d9649b3
SD		 551static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
552 unsigned char **iv,
5294b830
JD		 553 struct scatterlist **sg,
554 int num_frags)
5d9649b3
SD		 555{
556 size_t size, iv_offset, sg_offset;
557 struct aead_request *req;
558 void *tmp;
559
560 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
561 iv_offset = size;
562 size += GCM_AES_IV_LEN;
563
564 size = ALIGN(size, __alignof__(struct scatterlist));
565 sg_offset = size;
5294b830 566 size += sizeof(struct scatterlist) * num_frags;
5d9649b3
SD		 567
568 tmp = kmalloc(size, GFP_ATOMIC);
569 if (!tmp)
570 return NULL;
571
572 *iv = (unsigned char *)(tmp + iv_offset);
573 *sg = (struct scatterlist *)(tmp + sg_offset);
574 req = tmp;
575
576 aead_request_set_tfm(req, tfm);
577
578 return req;
579}
580
c09440f7
SD		 581static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
582 struct net_device *dev)
583{
584 int ret;
5d9649b3 585 struct scatterlist *sg;
5294b830 586 struct sk_buff *trailer;
5d9649b3 587 unsigned char *iv;
c09440f7
SD		 588 struct ethhdr *eth;
589 struct macsec_eth_header *hh;
590 size_t unprotected_len;
591 struct aead_request *req;
592 struct macsec_secy *secy;
593 struct macsec_tx_sc *tx_sc;
594 struct macsec_tx_sa *tx_sa;
595 struct macsec_dev *macsec = macsec_priv(dev);
e0f841f5 596 bool sci_present;
a21ecf0e 597 pn_t pn;
c09440f7
SD		 598
599 secy = &macsec->secy;
600 tx_sc = &secy->tx_sc;
601
602 /* 10.5.1 TX SA assignment */
603 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
604 if (!tx_sa) {
605 secy->operational = false;
606 kfree_skb(skb);
607 return ERR_PTR(-EINVAL);
608 }
609
610 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
611 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
612 struct sk_buff *nskb = skb_copy_expand(skb,
613 MACSEC_NEEDED_HEADROOM,
614 MACSEC_NEEDED_TAILROOM,
615 GFP_ATOMIC);
616 if (likely(nskb)) {
617 consume_skb(skb);
618 skb = nskb;
619 } else {
620 macsec_txsa_put(tx_sa);
621 kfree_skb(skb);
622 return ERR_PTR(-ENOMEM);
623 }
624 } else {
625 skb = skb_unshare(skb, GFP_ATOMIC);
626 if (!skb) {
627 macsec_txsa_put(tx_sa);
628 return ERR_PTR(-ENOMEM);
629 }
630 }
631
632 unprotected_len = skb->len;
633 eth = eth_hdr(skb);
e0f841f5 634 sci_present = send_sci(secy);
d58ff351 635 hh = skb_push(skb, macsec_extra_len(sci_present));
c09440f7
SD		 636 memmove(hh, eth, 2 * ETH_ALEN);
637
638 pn = tx_sa_update_pn(tx_sa, secy);
a21ecf0e 639 if (pn.full64 == 0) {
c09440f7
SD		 640 macsec_txsa_put(tx_sa);
641 kfree_skb(skb);
642 return ERR_PTR(-ENOLINK);
643 }
a21ecf0e 644 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
c09440f7
SD		 645 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
646
c09440f7
SD		 647 skb_put(skb, secy->icv_len);
648
649 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
650 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
651
652 u64_stats_update_begin(&secy_stats->syncp);
653 secy_stats->stats.OutPktsTooLong++;
654 u64_stats_update_end(&secy_stats->syncp);
655
656 macsec_txsa_put(tx_sa);
657 kfree_skb(skb);
658 return ERR_PTR(-EINVAL);
659 }
660
5294b830
JD		 661 ret = skb_cow_data(skb, 0, &trailer);
662 if (unlikely(ret < 0)) {
663 macsec_txsa_put(tx_sa);
664 kfree_skb(skb);
665 return ERR_PTR(ret);
666 }
667
668 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 669 if (!req) {
670 macsec_txsa_put(tx_sa);
671 kfree_skb(skb);
672 return ERR_PTR(-ENOMEM);
673 }
674
a21ecf0e
EM		 675 if (secy->xpn)
676 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
677 else
678 macsec_fill_iv(iv, secy->sci, pn.lower);
5d9649b3 679
5294b830 680 sg_init_table(sg, ret);
cda7ea69
JD		 681 ret = skb_to_sgvec(skb, sg, 0, skb->len);
682 if (unlikely(ret < 0)) {
5aba2ba5 683 aead_request_free(req);
cda7ea69
JD		 684 macsec_txsa_put(tx_sa);
685 kfree_skb(skb);
686 return ERR_PTR(ret);
687 }
c09440f7
SD		 688
689 if (tx_sc->encrypt) {
e0f841f5 690 int len = skb->len - macsec_hdr_len(sci_present) -
c09440f7
SD		 691 secy->icv_len;
692 aead_request_set_crypt(req, sg, sg, len, iv);
e0f841f5 693 aead_request_set_ad(req, macsec_hdr_len(sci_present));
c09440f7
SD		 694 } else {
695 aead_request_set_crypt(req, sg, sg, 0, iv);
696 aead_request_set_ad(req, skb->len - secy->icv_len);
697 }
698
699 macsec_skb_cb(skb)->req = req;
700 macsec_skb_cb(skb)->tx_sa = tx_sa;
701 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
702
703 dev_hold(skb->dev);
704 ret = crypto_aead_encrypt(req);
705 if (ret == -EINPROGRESS) {
706 return ERR_PTR(ret);
707 } else if (ret != 0) {
708 dev_put(skb->dev);
709 kfree_skb(skb);
710 aead_request_free(req);
711 macsec_txsa_put(tx_sa);
712 return ERR_PTR(-EINVAL);
713 }
714
715 dev_put(skb->dev);
716 aead_request_free(req);
717 macsec_txsa_put(tx_sa);
718
719 return skb;
720}
721
722static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
723{
724 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
725 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
726 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
727 u32 lowest_pn = 0;
728
729 spin_lock(&rx_sa->lock);
a21ecf0e
EM		 730 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
731 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
c09440f7
SD		 732
733 /* Now perform replay protection check again
734 * (see IEEE 802.1AE-2006 figure 10-5)
735 */
a21ecf0e
EM		 736 if (secy->replay_protect && pn < lowest_pn &&
737 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
c09440f7
SD		 738 spin_unlock(&rx_sa->lock);
739 u64_stats_update_begin(&rxsc_stats->syncp);
740 rxsc_stats->stats.InPktsLate++;
741 u64_stats_update_end(&rxsc_stats->syncp);
742 return false;
743 }
744
745 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
746 u64_stats_update_begin(&rxsc_stats->syncp);
747 if (hdr->tci_an & MACSEC_TCI_E)
748 rxsc_stats->stats.InOctetsDecrypted += skb->len;
749 else
750 rxsc_stats->stats.InOctetsValidated += skb->len;
751 u64_stats_update_end(&rxsc_stats->syncp);
752 }
753
754 if (!macsec_skb_cb(skb)->valid) {
755 spin_unlock(&rx_sa->lock);
756
757 /* 10.6.5 */
758 if (hdr->tci_an & MACSEC_TCI_C ||
759 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
760 u64_stats_update_begin(&rxsc_stats->syncp);
761 rxsc_stats->stats.InPktsNotValid++;
762 u64_stats_update_end(&rxsc_stats->syncp);
763 return false;
764 }
765
766 u64_stats_update_begin(&rxsc_stats->syncp);
767 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
768 rxsc_stats->stats.InPktsInvalid++;
769 this_cpu_inc(rx_sa->stats->InPktsInvalid);
770 } else if (pn < lowest_pn) {
771 rxsc_stats->stats.InPktsDelayed++;
772 } else {
773 rxsc_stats->stats.InPktsUnchecked++;
774 }
775 u64_stats_update_end(&rxsc_stats->syncp);
776 } else {
777 u64_stats_update_begin(&rxsc_stats->syncp);
778 if (pn < lowest_pn) {
779 rxsc_stats->stats.InPktsDelayed++;
780 } else {
781 rxsc_stats->stats.InPktsOK++;
782 this_cpu_inc(rx_sa->stats->InPktsOK);
783 }
784 u64_stats_update_end(&rxsc_stats->syncp);
785
a21ecf0e
EM		 786 // Instead of "pn >=" - to support pn overflow in xpn
787 if (pn + 1 > rx_sa->next_pn_halves.lower) {
788 rx_sa->next_pn_halves.lower = pn + 1;
789 } else if (secy->xpn &&
790 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
791 rx_sa->next_pn_halves.upper++;
792 rx_sa->next_pn_halves.lower = pn + 1;
793 }
794
c09440f7
SD		 795 spin_unlock(&rx_sa->lock);
796 }
797
798 return true;
799}
800
801static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
802{
803 skb->pkt_type = PACKET_HOST;
804 skb->protocol = eth_type_trans(skb, dev);
805
806 skb_reset_network_header(skb);
807 if (!skb_transport_header_was_set(skb))
808 skb_reset_transport_header(skb);
809 skb_reset_mac_len(skb);
810}
811
812static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
813{
7d8b16b9 814 skb->ip_summed = CHECKSUM_NONE;
c09440f7
SD		 815 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
816 skb_pull(skb, hdr_len);
817 pskb_trim_unique(skb, skb->len - icv_len);
818}
819
820static void count_rx(struct net_device *dev, int len)
821{
822 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
823
824 u64_stats_update_begin(&stats->syncp);
825 stats->rx_packets++;
826 stats->rx_bytes += len;
827 u64_stats_update_end(&stats->syncp);
828}
829
830static void macsec_decrypt_done(struct crypto_async_request *base, int err)
831{
832 struct sk_buff *skb = base->data;
833 struct net_device *dev = skb->dev;
834 struct macsec_dev *macsec = macsec_priv(dev);
835 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
c78ebe1d 836 struct macsec_rx_sc *rx_sc = rx_sa->sc;
863483c9 837 int len;
c09440f7
SD		 838 u32 pn;
839
840 aead_request_free(macsec_skb_cb(skb)->req);
841
b3bdc3ac
LR		 842 if (!err)
843 macsec_skb_cb(skb)->valid = true;
844
c09440f7
SD		 845 rcu_read_lock_bh();
846 pn = ntohl(macsec_ethhdr(skb)->packet_number);
847 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
848 rcu_read_unlock_bh();
849 kfree_skb(skb);
850 goto out;
851 }
852
853 macsec_finalize_skb(skb, macsec->secy.icv_len,
854 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
855 macsec_reset_skb(skb, macsec->secy.netdev);
856
857 len = skb->len;
863483c9 858 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
c09440f7 859 count_rx(dev, len);
c09440f7
SD		 860
861 rcu_read_unlock_bh();
862
863out:
864 macsec_rxsa_put(rx_sa);
c78ebe1d 865 macsec_rxsc_put(rx_sc);
c09440f7 866 dev_put(dev);
c09440f7
SD		 867}
868
869static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
870 struct net_device *dev,
871 struct macsec_rx_sa *rx_sa,
872 sci_t sci,
873 struct macsec_secy *secy)
874{
875 int ret;
5d9649b3 876 struct scatterlist *sg;
5294b830 877 struct sk_buff *trailer;
5d9649b3 878 unsigned char *iv;
c09440f7
SD		 879 struct aead_request *req;
880 struct macsec_eth_header *hdr;
a21ecf0e 881 u32 hdr_pn;
c09440f7
SD		 882 u16 icv_len = secy->icv_len;
883
884 macsec_skb_cb(skb)->valid = false;
885 skb = skb_share_check(skb, GFP_ATOMIC);
886 if (!skb)
c3b7d0bd 887 return ERR_PTR(-ENOMEM);
c09440f7 888
5294b830
JD		 889 ret = skb_cow_data(skb, 0, &trailer);
890 if (unlikely(ret < 0)) {
891 kfree_skb(skb);
892 return ERR_PTR(ret);
893 }
894 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 895 if (!req) {
896 kfree_skb(skb);
c3b7d0bd 897 return ERR_PTR(-ENOMEM);
c09440f7
SD		 898 }
899
900 hdr = (struct macsec_eth_header *)skb->data;
a21ecf0e
EM		 901 hdr_pn = ntohl(hdr->packet_number);
902
903 if (secy->xpn) {
904 pn_t recovered_pn = rx_sa->next_pn_halves;
905
906 recovered_pn.lower = hdr_pn;
907 if (hdr_pn < rx_sa->next_pn_halves.lower &&
908 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
909 recovered_pn.upper++;
910
911 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
912 rx_sa->key.salt);
913 } else {
914 macsec_fill_iv(iv, sci, hdr_pn);
915 }
c09440f7 916
5294b830 917 sg_init_table(sg, ret);
cda7ea69
JD		 918 ret = skb_to_sgvec(skb, sg, 0, skb->len);
919 if (unlikely(ret < 0)) {
5aba2ba5 920 aead_request_free(req);
cda7ea69
JD		 921 kfree_skb(skb);
922 return ERR_PTR(ret);
923 }
c09440f7
SD		 924
925 if (hdr->tci_an & MACSEC_TCI_E) {
926 /* confidentiality: ethernet + macsec header
927 * authenticated, encrypted payload
928 */
929 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
930
931 aead_request_set_crypt(req, sg, sg, len, iv);
932 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
933 skb = skb_unshare(skb, GFP_ATOMIC);
934 if (!skb) {
935 aead_request_free(req);
c3b7d0bd 936 return ERR_PTR(-ENOMEM);
c09440f7
SD		 937 }
938 } else {
939 /* integrity only: all headers + data authenticated */
940 aead_request_set_crypt(req, sg, sg, icv_len, iv);
941 aead_request_set_ad(req, skb->len - icv_len);
942 }
943
944 macsec_skb_cb(skb)->req = req;
c09440f7
SD		 945 skb->dev = dev;
946 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
947
948 dev_hold(dev);
949 ret = crypto_aead_decrypt(req);
950 if (ret == -EINPROGRESS) {
c3b7d0bd 951 return ERR_PTR(ret);
c09440f7
SD		 952 } else if (ret != 0) {
953 /* decryption/authentication failed
954 * 10.6 if validateFrames is disabled, deliver anyway
955 */
956 if (ret != -EBADMSG) {
957 kfree_skb(skb);
c3b7d0bd 958 skb = ERR_PTR(ret);
c09440f7
SD		 959 }
960 } else {
961 macsec_skb_cb(skb)->valid = true;
962 }
963 dev_put(dev);
964
965 aead_request_free(req);
966
967 return skb;
968}
969
970static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
971{
972 struct macsec_rx_sc *rx_sc;
973
974 for_each_rxsc(secy, rx_sc) {
975 if (rx_sc->sci == sci)
976 return rx_sc;
977 }
978
979 return NULL;
980}
981
982static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
983{
984 struct macsec_rx_sc *rx_sc;
985
986 for_each_rxsc_rtnl(secy, rx_sc) {
987 if (rx_sc->sci == sci)
988 return rx_sc;
989 }
990
991 return NULL;
992}
993
3cf3227a 994static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
c09440f7 995{
3cf3227a
AT		 996 /* Deliver to the uncontrolled port by default */
997 enum rx_handler_result ret = RX_HANDLER_PASS;
f428011b 998 struct ethhdr *hdr = eth_hdr(skb);
c09440f7
SD		 999 struct macsec_rxh_data *rxd;
1000 struct macsec_dev *macsec;
1001
1002 rcu_read_lock();
1003 rxd = macsec_data_rcu(skb->dev);
1004
c09440f7
SD		 1005 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1006 struct sk_buff *nskb;
c09440f7 1007 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
f428011b
MS		 1008 struct net_device *ndev = macsec->secy.netdev;
1009
1010 /* If h/w offloading is enabled, HW decodes frames and strips
1011 * the SecTAG, so we have to deduce which port to deliver to.
1012 */
1013 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
1014 if (ether_addr_equal_64bits(hdr->h_dest,
1015 ndev->dev_addr)) {
1016 /* exact match, divert skb to this port */
1017 skb->dev = ndev;
1018 skb->pkt_type = PACKET_HOST;
1019 ret = RX_HANDLER_ANOTHER;
1020 goto out;
1021 } else if (is_multicast_ether_addr_64bits(
1022 hdr->h_dest)) {
1023 /* multicast frame, deliver on this port too */
1024 nskb = skb_clone(skb, GFP_ATOMIC);
1025 if (!nskb)
1026 break;
1027
1028 nskb->dev = ndev;
1029 if (ether_addr_equal_64bits(hdr->h_dest,
1030 ndev->broadcast))
1031 nskb->pkt_type = PACKET_BROADCAST;
1032 else
1033 nskb->pkt_type = PACKET_MULTICAST;
1034
1035 netif_rx(nskb);
1036 }
1037 continue;
1038 }
c09440f7 1039
f428011b
MS		 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
1043 */
1044 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
c09440f7
SD		 1045 u64_stats_update_begin(&secy_stats->syncp);
1046 secy_stats->stats.InPktsNoTag++;
1047 u64_stats_update_end(&secy_stats->syncp);
1048 continue;
1049 }
1050
1051 /* deliver on this port */
1052 nskb = skb_clone(skb, GFP_ATOMIC);
1053 if (!nskb)
1054 break;
1055
f428011b 1056 nskb->dev = ndev;
c09440f7 1057
863483c9 1058 if (netif_rx(nskb) == NET_RX_SUCCESS) {
c09440f7
SD		 1059 u64_stats_update_begin(&secy_stats->syncp);
1060 secy_stats->stats.InPktsUntagged++;
1061 u64_stats_update_end(&secy_stats->syncp);
c09440f7
SD		 1062 }
1063 }
1064
3cf3227a 1065out:
c09440f7 1066 rcu_read_unlock();
3cf3227a 1067 return ret;
c09440f7
SD		 1068}
1069
1070static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1071{
1072 struct sk_buff *skb = *pskb;
1073 struct net_device *dev = skb->dev;
1074 struct macsec_eth_header *hdr;
1075 struct macsec_secy *secy = NULL;
1076 struct macsec_rx_sc *rx_sc;
1077 struct macsec_rx_sa *rx_sa;
1078 struct macsec_rxh_data *rxd;
1079 struct macsec_dev *macsec;
c7cc9200 1080 unsigned int len;
c09440f7 1081 sci_t sci;
a21ecf0e 1082 u32 hdr_pn;
c09440f7
SD		 1083 bool cbit;
1084 struct pcpu_rx_sc_stats *rxsc_stats;
1085 struct pcpu_secy_stats *secy_stats;
1086 bool pulled_sci;
5491e7c6 1087 int ret;
c09440f7
SD		 1088
1089 if (skb_headroom(skb) < ETH_HLEN)
1090 goto drop_direct;
1091
1092 hdr = macsec_ethhdr(skb);
3cf3227a
AT		 1093 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1094 return handle_not_macsec(skb);
c09440f7
SD		 1095
1096 skb = skb_unshare(skb, GFP_ATOMIC);
095c02da
AS		 1097 *pskb = skb;
1098 if (!skb)
c09440f7 1099 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1100
1101 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1102 if (!pulled_sci) {
1103 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1104 goto drop_direct;
1105 }
1106
1107 hdr = macsec_ethhdr(skb);
1108
1109 /* Frames with a SecTAG that has the TCI E bit set but the C
1110 * bit clear are discarded, as this reserved encoding is used
1111 * to identify frames with a SecTAG that are not to be
1112 * delivered to the Controlled Port.
1113 */
1114 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1115 return RX_HANDLER_PASS;
1116
1117 /* now, pull the extra length */
1118 if (hdr->tci_an & MACSEC_TCI_SC) {
1119 if (!pulled_sci)
1120 goto drop_direct;
1121 }
1122
1123 /* ethernet header is part of crypto processing */
1124 skb_push(skb, ETH_HLEN);
1125
1126 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1127 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1128 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1129
1130 rcu_read_lock();
1131 rxd = macsec_data_rcu(skb->dev);
1132
1133 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1134 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
7979472b 1135
c78ebe1d 1136 sc = sc ? macsec_rxsc_get(sc) : NULL;
c09440f7
SD		 1137
1138 if (sc) {
1139 secy = &macsec->secy;
1140 rx_sc = sc;
1141 break;
1142 }
1143 }
1144
1145 if (!secy)
1146 goto nosci;
1147
1148 dev = secy->netdev;
1149 macsec = macsec_priv(dev);
1150 secy_stats = this_cpu_ptr(macsec->stats);
1151 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1152
a21ecf0e 1153 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
c09440f7
SD		 1154 u64_stats_update_begin(&secy_stats->syncp);
1155 secy_stats->stats.InPktsBadTag++;
1156 u64_stats_update_end(&secy_stats->syncp);
1157 goto drop_nosa;
1158 }
1159
1160 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1161 if (!rx_sa) {
1162 /* 10.6.1 if the SA is not in use */
1163
1164 /* If validateFrames is Strict or the C bit in the
1165 * SecTAG is set, discard
1166 */
1167 if (hdr->tci_an & MACSEC_TCI_C ||
1168 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1169 u64_stats_update_begin(&rxsc_stats->syncp);
1170 rxsc_stats->stats.InPktsNotUsingSA++;
1171 u64_stats_update_end(&rxsc_stats->syncp);
1172 goto drop_nosa;
1173 }
1174
1175 /* not Strict, the frame (with the SecTAG and ICV
1176 * removed) is delivered to the Controlled Port.
1177 */
1178 u64_stats_update_begin(&rxsc_stats->syncp);
1179 rxsc_stats->stats.InPktsUnusedSA++;
1180 u64_stats_update_end(&rxsc_stats->syncp);
1181 goto deliver;
1182 }
1183
1184 /* First, PN check to avoid decrypting obviously wrong packets */
a21ecf0e 1185 hdr_pn = ntohl(hdr->packet_number);
c09440f7
SD		 1186 if (secy->replay_protect) {
1187 bool late;
1188
1189 spin_lock(&rx_sa->lock);
a21ecf0e
EM		 1190 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1191 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1192
1193 if (secy->xpn)
1194 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
c09440f7
SD		 1195 spin_unlock(&rx_sa->lock);
1196
1197 if (late) {
1198 u64_stats_update_begin(&rxsc_stats->syncp);
1199 rxsc_stats->stats.InPktsLate++;
1200 u64_stats_update_end(&rxsc_stats->syncp);
1201 goto drop;
1202 }
1203 }
1204
e3a3b626
BG		 1205 macsec_skb_cb(skb)->rx_sa = rx_sa;
1206
c09440f7
SD		 1207 /* Disabled && !changed text => skip validation */
1208 if (hdr->tci_an & MACSEC_TCI_C ||
1209 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1210 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1211
c3b7d0bd
SD		 1212 if (IS_ERR(skb)) {
1213 /* the decrypt callback needs the reference */
c78ebe1d 1214 if (PTR_ERR(skb) != -EINPROGRESS) {
c3b7d0bd 1215 macsec_rxsa_put(rx_sa);
c78ebe1d
SD		 1216 macsec_rxsc_put(rx_sc);
1217 }
c09440f7
SD		 1218 rcu_read_unlock();
1219 *pskb = NULL;
1220 return RX_HANDLER_CONSUMED;
1221 }
1222
a21ecf0e 1223 if (!macsec_post_decrypt(skb, secy, hdr_pn))
c09440f7
SD		 1224 goto drop;
1225
1226deliver:
1227 macsec_finalize_skb(skb, secy->icv_len,
1228 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1229 macsec_reset_skb(skb, secy->netdev);
1230
497f358a
SD		 1231 if (rx_sa)
1232 macsec_rxsa_put(rx_sa);
c78ebe1d 1233 macsec_rxsc_put(rx_sc);
5491e7c6 1234
ba56d8ce 1235 skb_orphan(skb);
c7cc9200 1236 len = skb->len;
5491e7c6
PA		 1237 ret = gro_cells_receive(&macsec->gro_cells, skb);
1238 if (ret == NET_RX_SUCCESS)
c7cc9200 1239 count_rx(dev, len);
5491e7c6
PA		 1240 else
1241 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1242
1243 rcu_read_unlock();
1244
5491e7c6
PA		 1245 *pskb = NULL;
1246 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1247
1248drop:
1249 macsec_rxsa_put(rx_sa);
1250drop_nosa:
c78ebe1d 1251 macsec_rxsc_put(rx_sc);
c09440f7
SD		 1252 rcu_read_unlock();
1253drop_direct:
1254 kfree_skb(skb);
1255 *pskb = NULL;
1256 return RX_HANDLER_CONSUMED;
1257
1258nosci:
1259 /* 10.6.1 if the SC is not found */
1260 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1261 if (!cbit)
1262 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1263 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1264
1265 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1266 struct sk_buff *nskb;
c09440f7
SD		 1267
1268 secy_stats = this_cpu_ptr(macsec->stats);
1269
1270 /* If validateFrames is Strict or the C bit in the
1271 * SecTAG is set, discard
1272 */
1273 if (cbit ||
1274 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1275 u64_stats_update_begin(&secy_stats->syncp);
1276 secy_stats->stats.InPktsNoSCI++;
1277 u64_stats_update_end(&secy_stats->syncp);
1278 continue;
1279 }
1280
1281 /* not strict, the frame (with the SecTAG and ICV
1282 * removed) is delivered to the Controlled Port.
1283 */
1284 nskb = skb_clone(skb, GFP_ATOMIC);
1285 if (!nskb)
1286 break;
1287
1288 macsec_reset_skb(nskb, macsec->secy.netdev);
1289
1290 ret = netif_rx(nskb);
1291 if (ret == NET_RX_SUCCESS) {
1292 u64_stats_update_begin(&secy_stats->syncp);
1293 secy_stats->stats.InPktsUnknownSCI++;
1294 u64_stats_update_end(&secy_stats->syncp);
1295 } else {
1296 macsec->secy.netdev->stats.rx_dropped++;
1297 }
1298 }
1299
1300 rcu_read_unlock();
1301 *pskb = skb;
1302 return RX_HANDLER_PASS;
1303}
1304
1305static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1306{
1307 struct crypto_aead *tfm;
1308 int ret;
1309
ab046a5d
SD		 1310 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1311 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
34aedfee
DC		 1312
1313 if (IS_ERR(tfm))
1314 return tfm;
c09440f7
SD		 1315
1316 ret = crypto_aead_setkey(tfm, key, key_len);
34aedfee
DC		 1317 if (ret < 0)
1318 goto fail;
c09440f7
SD		 1319
1320 ret = crypto_aead_setauthsize(tfm, icv_len);
34aedfee
DC		 1321 if (ret < 0)
1322 goto fail;
c09440f7
SD		 1323
1324 return tfm;
34aedfee
DC		 1325fail:
1326 crypto_free_aead(tfm);
1327 return ERR_PTR(ret);
c09440f7
SD		 1328}
1329
1330static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1331 int icv_len)
1332{
1333 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1334 if (!rx_sa->stats)
34aedfee 1335 return -ENOMEM;
c09440f7
SD		 1336
1337 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1338 if (IS_ERR(rx_sa->key.tfm)) {
c09440f7 1339 free_percpu(rx_sa->stats);
34aedfee 1340 return PTR_ERR(rx_sa->key.tfm);
c09440f7
SD		 1341 }
1342
48ef50fa 1343 rx_sa->ssci = MACSEC_UNDEF_SSCI;
c09440f7
SD		 1344 rx_sa->active = false;
1345 rx_sa->next_pn = 1;
e187246f 1346 refcount_set(&rx_sa->refcnt, 1);
c09440f7
SD		 1347 spin_lock_init(&rx_sa->lock);
1348
1349 return 0;
1350}
1351
1352static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1353{
1354 rx_sa->active = false;
1355
1356 macsec_rxsa_put(rx_sa);
1357}
1358
1359static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1360{
1361 int i;
1362
1363 for (i = 0; i < MACSEC_NUM_AN; i++) {
1364 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1365
1366 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1367 if (sa)
1368 clear_rx_sa(sa);
1369 }
1370
1371 macsec_rxsc_put(rx_sc);
1372}
1373
1374static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1375{
1376 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1377
1378 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1379 rx_sc;
1380 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1381 if (rx_sc->sci == sci) {
1382 if (rx_sc->active)
1383 secy->n_rx_sc--;
1384 rcu_assign_pointer(*rx_scp, rx_sc->next);
1385 return rx_sc;
1386 }
1387 }
1388
1389 return NULL;
1390}
1391
1392static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1393{
1394 struct macsec_rx_sc *rx_sc;
1395 struct macsec_dev *macsec;
1396 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1397 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1398 struct macsec_secy *secy;
1399
1400 list_for_each_entry(macsec, &rxd->secys, secys) {
1401 if (find_rx_sc_rtnl(&macsec->secy, sci))
1402 return ERR_PTR(-EEXIST);
1403 }
1404
1405 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1406 if (!rx_sc)
1407 return ERR_PTR(-ENOMEM);
1408
1409 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1410 if (!rx_sc->stats) {
1411 kfree(rx_sc);
1412 return ERR_PTR(-ENOMEM);
1413 }
1414
1415 rx_sc->sci = sci;
1416 rx_sc->active = true;
8676d76f 1417 refcount_set(&rx_sc->refcnt, 1);
c09440f7
SD		 1418
1419 secy = &macsec_priv(dev)->secy;
1420 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1421 rcu_assign_pointer(secy->rx_sc, rx_sc);
1422
1423 if (rx_sc->active)
1424 secy->n_rx_sc++;
1425
1426 return rx_sc;
1427}
1428
1429static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1430 int icv_len)
1431{
1432 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1433 if (!tx_sa->stats)
34aedfee 1434 return -ENOMEM;
c09440f7
SD		 1435
1436 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1437 if (IS_ERR(tx_sa->key.tfm)) {
c09440f7 1438 free_percpu(tx_sa->stats);
34aedfee 1439 return PTR_ERR(tx_sa->key.tfm);
c09440f7
SD		 1440 }
1441
48ef50fa 1442 tx_sa->ssci = MACSEC_UNDEF_SSCI;
c09440f7 1443 tx_sa->active = false;
28206cdb 1444 refcount_set(&tx_sa->refcnt, 1);
c09440f7
SD		 1445 spin_lock_init(&tx_sa->lock);
1446
1447 return 0;
1448}
1449
1450static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1451{
1452 tx_sa->active = false;
1453
1454 macsec_txsa_put(tx_sa);
1455}
1456
489111e5 1457static struct genl_family macsec_fam;
c09440f7
SD		 1458
1459static struct net_device *get_dev_from_nl(struct net *net,
1460 struct nlattr **attrs)
1461{
1462 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1463 struct net_device *dev;
1464
1465 dev = __dev_get_by_index(net, ifindex);
1466 if (!dev)
1467 return ERR_PTR(-ENODEV);
1468
1469 if (!netif_is_macsec(dev))
1470 return ERR_PTR(-ENODEV);
1471
1472 return dev;
1473}
1474
791bb3fc
MS		 1475static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1476{
1477 return (__force enum macsec_offload)nla_get_u8(nla);
1478}
1479
c09440f7
SD		 1480static sci_t nla_get_sci(const struct nlattr *nla)
1481{
1482 return (__force sci_t)nla_get_u64(nla);
1483}
1484
f60d94c0
ND		 1485static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1486 int padattr)
c09440f7 1487{
f60d94c0 1488 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
c09440f7
SD		 1489}
1490
48ef50fa
EM		 1491static ssci_t nla_get_ssci(const struct nlattr *nla)
1492{
1493 return (__force ssci_t)nla_get_u32(nla);
1494}
1495
1496static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1497{
1498 return nla_put_u32(skb, attrtype, (__force u64)value);
1499}
1500
c09440f7
SD		 1501static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1502 struct nlattr **attrs,
1503 struct nlattr **tb_sa,
1504 struct net_device **devp,
1505 struct macsec_secy **secyp,
1506 struct macsec_tx_sc **scp,
1507 u8 *assoc_num)
1508{
1509 struct net_device *dev;
1510 struct macsec_secy *secy;
1511 struct macsec_tx_sc *tx_sc;
1512 struct macsec_tx_sa *tx_sa;
1513
1514 if (!tb_sa[MACSEC_SA_ATTR_AN])
1515 return ERR_PTR(-EINVAL);
1516
1517 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1518
1519 dev = get_dev_from_nl(net, attrs);
1520 if (IS_ERR(dev))
1521 return ERR_CAST(dev);
1522
1523 if (*assoc_num >= MACSEC_NUM_AN)
1524 return ERR_PTR(-EINVAL);
1525
1526 secy = &macsec_priv(dev)->secy;
1527 tx_sc = &secy->tx_sc;
1528
1529 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1530 if (!tx_sa)
1531 return ERR_PTR(-ENODEV);
1532
1533 *devp = dev;
1534 *scp = tx_sc;
1535 *secyp = secy;
1536 return tx_sa;
1537}
1538
1539static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1540 struct nlattr **attrs,
1541 struct nlattr **tb_rxsc,
1542 struct net_device **devp,
1543 struct macsec_secy **secyp)
1544{
1545 struct net_device *dev;
1546 struct macsec_secy *secy;
1547 struct macsec_rx_sc *rx_sc;
1548 sci_t sci;
1549
1550 dev = get_dev_from_nl(net, attrs);
1551 if (IS_ERR(dev))
1552 return ERR_CAST(dev);
1553
1554 secy = &macsec_priv(dev)->secy;
1555
1556 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1557 return ERR_PTR(-EINVAL);
1558
1559 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1560 rx_sc = find_rx_sc_rtnl(secy, sci);
1561 if (!rx_sc)
1562 return ERR_PTR(-ENODEV);
1563
1564 *secyp = secy;
1565 *devp = dev;
1566
1567 return rx_sc;
1568}
1569
1570static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1571 struct nlattr **attrs,
1572 struct nlattr **tb_rxsc,
1573 struct nlattr **tb_sa,
1574 struct net_device **devp,
1575 struct macsec_secy **secyp,
1576 struct macsec_rx_sc **scp,
1577 u8 *assoc_num)
1578{
1579 struct macsec_rx_sc *rx_sc;
1580 struct macsec_rx_sa *rx_sa;
1581
1582 if (!tb_sa[MACSEC_SA_ATTR_AN])
1583 return ERR_PTR(-EINVAL);
1584
1585 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1586 if (*assoc_num >= MACSEC_NUM_AN)
1587 return ERR_PTR(-EINVAL);
1588
1589 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1590 if (IS_ERR(rx_sc))
1591 return ERR_CAST(rx_sc);
1592
1593 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1594 if (!rx_sa)
1595 return ERR_PTR(-ENODEV);
1596
1597 *scp = rx_sc;
1598 return rx_sa;
1599}
1600
c09440f7
SD		 1601static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1602 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1603 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1604 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
dcb780fb 1605 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
c09440f7
SD		 1606};
1607
1608static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1609 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1610 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1611};
1612
1613static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1614 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1615 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
bc043585 1616 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
8acca6ac
SD		 1617 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1618 .len = MACSEC_KEYID_LEN, },
c09440f7 1619 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
e8660ded 1620 .len = MACSEC_MAX_KEY_LEN, },
48ef50fa
EM		 1621 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1622 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1623 .len = MACSEC_SALT_LEN, },
c09440f7
SD		 1624};
1625
dcb780fb
AT		 1626static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1627 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1628};
1629
3cf3227a
AT		 1630/* Offloads an operation to a device driver */
1631static int macsec_offload(int (* const func)(struct macsec_context *),
1632 struct macsec_context *ctx)
1633{
1634 int ret;
1635
1636 if (unlikely(!func))
1637 return 0;
1638
1639 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1640 mutex_lock(&ctx->phydev->lock);
1641
1642 /* Phase I: prepare. The drive should fail here if there are going to be
1643 * issues in the commit phase.
1644 */
1645 ctx->prepare = true;
1646 ret = (*func)(ctx);
1647 if (ret)
1648 goto phy_unlock;
1649
1650 /* Phase II: commit. This step cannot fail. */
1651 ctx->prepare = false;
1652 ret = (*func)(ctx);
1653 /* This should never happen: commit is not allowed to fail */
1654 if (unlikely(ret))
1655 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1656
1657phy_unlock:
1658 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1659 mutex_unlock(&ctx->phydev->lock);
1660
1661 return ret;
1662}
1663
c09440f7
SD		 1664static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1665{
1666 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1667 return -EINVAL;
1668
8cb08174 1669 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
c09440f7
SD		 1670 return -EINVAL;
1671
1672 return 0;
1673}
1674
1675static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1676{
1677 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1678 return -EINVAL;
1679
8cb08174 1680 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
c09440f7
SD		 1681 return -EINVAL;
1682
1683 return 0;
1684}
1685
1686static bool validate_add_rxsa(struct nlattr **attrs)
1687{
1688 if (!attrs[MACSEC_SA_ATTR_AN] ||
1689 !attrs[MACSEC_SA_ATTR_KEY] ||
1690 !attrs[MACSEC_SA_ATTR_KEYID])
1691 return false;
1692
1693 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1694 return false;
1695
48ef50fa
EM		 1696 if (attrs[MACSEC_SA_ATTR_PN] &&
1697 *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0)
c09440f7
SD		 1698 return false;
1699
1700 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1701 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1702 return false;
1703 }
1704
8acca6ac
SD		 1705 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1706 return false;
1707
c09440f7
SD		 1708 return true;
1709}
1710
1711static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1712{
1713 struct net_device *dev;
1714 struct nlattr **attrs = info->attrs;
1715 struct macsec_secy *secy;
1716 struct macsec_rx_sc *rx_sc;
1717 struct macsec_rx_sa *rx_sa;
1718 unsigned char assoc_num;
48ef50fa 1719 int pn_len;
c09440f7
SD		 1720 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1721 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1722 int err;
c09440f7
SD		 1723
1724 if (!attrs[MACSEC_ATTR_IFINDEX])
1725 return -EINVAL;
1726
1727 if (parse_sa_config(attrs, tb_sa))
1728 return -EINVAL;
1729
1730 if (parse_rxsc_config(attrs, tb_rxsc))
1731 return -EINVAL;
1732
1733 if (!validate_add_rxsa(tb_sa))
1734 return -EINVAL;
1735
1736 rtnl_lock();
1737 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
36b232c8 1738 if (IS_ERR(rx_sc)) {
c09440f7
SD		 1739 rtnl_unlock();
1740 return PTR_ERR(rx_sc);
1741 }
1742
1743 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1744
1745 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1746 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1747 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1748 rtnl_unlock();
1749 return -EINVAL;
1750 }
1751
48ef50fa
EM		 1752 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1753 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1754 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1755 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1756 rtnl_unlock();
1757 return -EINVAL;
1758 }
1759
1760 if (secy->xpn) {
1761 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1762 rtnl_unlock();
1763 return -EINVAL;
1764 }
1765
1766 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1767 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1768 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1769 MACSEC_SA_ATTR_SALT);
1770 rtnl_unlock();
1771 return -EINVAL;
1772 }
1773 }
1774
c09440f7
SD		 1775 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1776 if (rx_sa) {
1777 rtnl_unlock();
1778 return -EBUSY;
1779 }
1780
1781 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
34aedfee 1782 if (!rx_sa) {
c09440f7
SD		 1783 rtnl_unlock();
1784 return -ENOMEM;
1785 }
1786
34aedfee
DC		 1787 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1788 secy->key_len, secy->icv_len);
1789 if (err < 0) {
1790 kfree(rx_sa);
1791 rtnl_unlock();
1792 return err;
1793 }
1794
c09440f7
SD		 1795 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1796 spin_lock_bh(&rx_sa->lock);
48ef50fa 1797 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 1798 spin_unlock_bh(&rx_sa->lock);
1799 }
1800
1801 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1802 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1803
c09440f7 1804 rx_sa->sc = rx_sc;
3cf3227a
AT		 1805
1806 /* If h/w offloading is available, propagate to the device */
1807 if (macsec_is_offloaded(netdev_priv(dev))) {
1808 const struct macsec_ops *ops;
1809 struct macsec_context ctx;
1810
1811 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1812 if (!ops) {
1813 err = -EOPNOTSUPP;
1814 goto cleanup;
1815 }
1816
1817 ctx.sa.assoc_num = assoc_num;
1818 ctx.sa.rx_sa = rx_sa;
182879f8 1819 ctx.secy = secy;
3cf3227a
AT		 1820 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1821 MACSEC_KEYID_LEN);
1822
1823 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1824 if (err)
1825 goto cleanup;
1826 }
1827
48ef50fa
EM		 1828 if (secy->xpn) {
1829 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1830 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1831 MACSEC_SALT_LEN);
1832 }
1833
3cf3227a 1834 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1835 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1836
1837 rtnl_unlock();
1838
1839 return 0;
3cf3227a
AT		 1840
1841cleanup:
1842 kfree(rx_sa);
1843 rtnl_unlock();
1844 return err;
c09440f7
SD		 1845}
1846
1847static bool validate_add_rxsc(struct nlattr **attrs)
1848{
1849 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1850 return false;
1851
1852 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1853 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1854 return false;
1855 }
1856
1857 return true;
1858}
1859
1860static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1861{
1862 struct net_device *dev;
1863 sci_t sci = MACSEC_UNDEF_SCI;
1864 struct nlattr **attrs = info->attrs;
1865 struct macsec_rx_sc *rx_sc;
1866 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
182879f8 1867 struct macsec_secy *secy;
3cf3227a
AT		 1868 bool was_active;
1869 int ret;
c09440f7
SD		 1870
1871 if (!attrs[MACSEC_ATTR_IFINDEX])
1872 return -EINVAL;
1873
1874 if (parse_rxsc_config(attrs, tb_rxsc))
1875 return -EINVAL;
1876
1877 if (!validate_add_rxsc(tb_rxsc))
1878 return -EINVAL;
1879
1880 rtnl_lock();
1881 dev = get_dev_from_nl(genl_info_net(info), attrs);
1882 if (IS_ERR(dev)) {
1883 rtnl_unlock();
1884 return PTR_ERR(dev);
1885 }
1886
182879f8 1887 secy = &macsec_priv(dev)->secy;
c09440f7
SD		 1888 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1889
1890 rx_sc = create_rx_sc(dev, sci);
1891 if (IS_ERR(rx_sc)) {
1892 rtnl_unlock();
1893 return PTR_ERR(rx_sc);
1894 }
1895
3cf3227a 1896 was_active = rx_sc->active;
c09440f7
SD		 1897 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1898 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1899
3cf3227a
AT		 1900 if (macsec_is_offloaded(netdev_priv(dev))) {
1901 const struct macsec_ops *ops;
1902 struct macsec_context ctx;
1903
1904 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1905 if (!ops) {
1906 ret = -EOPNOTSUPP;
1907 goto cleanup;
1908 }
1909
1910 ctx.rx_sc = rx_sc;
182879f8 1911 ctx.secy = secy;
3cf3227a
AT		 1912
1913 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1914 if (ret)
1915 goto cleanup;
1916 }
1917
c09440f7
SD		 1918 rtnl_unlock();
1919
1920 return 0;
3cf3227a
AT		 1921
1922cleanup:
1923 rx_sc->active = was_active;
1924 rtnl_unlock();
1925 return ret;
c09440f7
SD		 1926}
1927
1928static bool validate_add_txsa(struct nlattr **attrs)
1929{
1930 if (!attrs[MACSEC_SA_ATTR_AN] ||
1931 !attrs[MACSEC_SA_ATTR_PN] ||
1932 !attrs[MACSEC_SA_ATTR_KEY] ||
1933 !attrs[MACSEC_SA_ATTR_KEYID])
1934 return false;
1935
1936 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1937 return false;
1938
1939 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1940 return false;
1941
1942 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1943 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1944 return false;
1945 }
1946
8acca6ac
SD		 1947 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1948 return false;
1949
c09440f7
SD		 1950 return true;
1951}
1952
1953static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1954{
1955 struct net_device *dev;
1956 struct nlattr **attrs = info->attrs;
1957 struct macsec_secy *secy;
1958 struct macsec_tx_sc *tx_sc;
1959 struct macsec_tx_sa *tx_sa;
1960 unsigned char assoc_num;
48ef50fa 1961 int pn_len;
c09440f7 1962 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 1963 bool was_operational;
34aedfee 1964 int err;
c09440f7
SD		 1965
1966 if (!attrs[MACSEC_ATTR_IFINDEX])
1967 return -EINVAL;
1968
1969 if (parse_sa_config(attrs, tb_sa))
1970 return -EINVAL;
1971
1972 if (!validate_add_txsa(tb_sa))
1973 return -EINVAL;
1974
1975 rtnl_lock();
1976 dev = get_dev_from_nl(genl_info_net(info), attrs);
1977 if (IS_ERR(dev)) {
1978 rtnl_unlock();
1979 return PTR_ERR(dev);
1980 }
1981
1982 secy = &macsec_priv(dev)->secy;
1983 tx_sc = &secy->tx_sc;
1984
1985 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1986
1987 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1988 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1989 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1990 rtnl_unlock();
1991 return -EINVAL;
1992 }
1993
48ef50fa
EM		 1994 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1995 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1996 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
1997 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1998 rtnl_unlock();
1999 return -EINVAL;
2000 }
2001
2002 if (secy->xpn) {
2003 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2004 rtnl_unlock();
2005 return -EINVAL;
2006 }
2007
2008 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2009 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2010 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2011 MACSEC_SA_ATTR_SALT);
2012 rtnl_unlock();
2013 return -EINVAL;
2014 }
2015 }
2016
c09440f7
SD		 2017 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2018 if (tx_sa) {
2019 rtnl_unlock();
2020 return -EBUSY;
2021 }
2022
2023 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
34aedfee 2024 if (!tx_sa) {
c09440f7
SD		 2025 rtnl_unlock();
2026 return -ENOMEM;
2027 }
2028
34aedfee
DC		 2029 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2030 secy->key_len, secy->icv_len);
2031 if (err < 0) {
2032 kfree(tx_sa);
2033 rtnl_unlock();
2034 return err;
2035 }
2036
c09440f7 2037 spin_lock_bh(&tx_sa->lock);
48ef50fa 2038 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2039 spin_unlock_bh(&tx_sa->lock);
2040
2041 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2042 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2043
3cf3227a 2044 was_operational = secy->operational;
c09440f7
SD		 2045 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2046 secy->operational = true;
2047
3cf3227a
AT		 2048 /* If h/w offloading is available, propagate to the device */
2049 if (macsec_is_offloaded(netdev_priv(dev))) {
2050 const struct macsec_ops *ops;
2051 struct macsec_context ctx;
2052
2053 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2054 if (!ops) {
2055 err = -EOPNOTSUPP;
2056 goto cleanup;
2057 }
2058
2059 ctx.sa.assoc_num = assoc_num;
2060 ctx.sa.tx_sa = tx_sa;
182879f8 2061 ctx.secy = secy;
3cf3227a
AT		 2062 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2063 MACSEC_KEYID_LEN);
2064
2065 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2066 if (err)
2067 goto cleanup;
2068 }
2069
48ef50fa
EM		 2070 if (secy->xpn) {
2071 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2072 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2073 MACSEC_SALT_LEN);
2074 }
2075
3cf3227a 2076 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 2077 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2078
2079 rtnl_unlock();
2080
2081 return 0;
3cf3227a
AT		 2082
2083cleanup:
2084 secy->operational = was_operational;
2085 kfree(tx_sa);
2086 rtnl_unlock();
2087 return err;
c09440f7
SD		 2088}
2089
2090static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2091{
2092 struct nlattr **attrs = info->attrs;
2093 struct net_device *dev;
2094 struct macsec_secy *secy;
2095 struct macsec_rx_sc *rx_sc;
2096 struct macsec_rx_sa *rx_sa;
2097 u8 assoc_num;
2098 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2099 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2100 int ret;
c09440f7
SD		 2101
2102 if (!attrs[MACSEC_ATTR_IFINDEX])
2103 return -EINVAL;
2104
2105 if (parse_sa_config(attrs, tb_sa))
2106 return -EINVAL;
2107
2108 if (parse_rxsc_config(attrs, tb_rxsc))
2109 return -EINVAL;
2110
2111 rtnl_lock();
2112 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2113 &dev, &secy, &rx_sc, &assoc_num);
2114 if (IS_ERR(rx_sa)) {
2115 rtnl_unlock();
2116 return PTR_ERR(rx_sa);
2117 }
2118
2119 if (rx_sa->active) {
2120 rtnl_unlock();
2121 return -EBUSY;
2122 }
2123
3cf3227a
AT		 2124 /* If h/w offloading is available, propagate to the device */
2125 if (macsec_is_offloaded(netdev_priv(dev))) {
2126 const struct macsec_ops *ops;
2127 struct macsec_context ctx;
2128
2129 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2130 if (!ops) {
2131 ret = -EOPNOTSUPP;
2132 goto cleanup;
2133 }
2134
2135 ctx.sa.assoc_num = assoc_num;
2136 ctx.sa.rx_sa = rx_sa;
182879f8 2137 ctx.secy = secy;
3cf3227a
AT		 2138
2139 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2140 if (ret)
2141 goto cleanup;
2142 }
2143
c09440f7
SD		 2144 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2145 clear_rx_sa(rx_sa);
2146
2147 rtnl_unlock();
2148
2149 return 0;
3cf3227a
AT		 2150
2151cleanup:
2152 rtnl_unlock();
2153 return ret;
c09440f7
SD		 2154}
2155
2156static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2157{
2158 struct nlattr **attrs = info->attrs;
2159 struct net_device *dev;
2160 struct macsec_secy *secy;
2161 struct macsec_rx_sc *rx_sc;
2162 sci_t sci;
2163 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a 2164 int ret;
c09440f7
SD		 2165
2166 if (!attrs[MACSEC_ATTR_IFINDEX])
2167 return -EINVAL;
2168
2169 if (parse_rxsc_config(attrs, tb_rxsc))
2170 return -EINVAL;
2171
2172 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2173 return -EINVAL;
2174
2175 rtnl_lock();
2176 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2177 if (IS_ERR(dev)) {
2178 rtnl_unlock();
2179 return PTR_ERR(dev);
2180 }
2181
2182 secy = &macsec_priv(dev)->secy;
2183 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2184
2185 rx_sc = del_rx_sc(secy, sci);
2186 if (!rx_sc) {
2187 rtnl_unlock();
2188 return -ENODEV;
2189 }
2190
3cf3227a
AT		 2191 /* If h/w offloading is available, propagate to the device */
2192 if (macsec_is_offloaded(netdev_priv(dev))) {
2193 const struct macsec_ops *ops;
2194 struct macsec_context ctx;
2195
2196 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2197 if (!ops) {
2198 ret = -EOPNOTSUPP;
2199 goto cleanup;
2200 }
2201
2202 ctx.rx_sc = rx_sc;
182879f8 2203 ctx.secy = secy;
3cf3227a
AT		 2204 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2205 if (ret)
2206 goto cleanup;
2207 }
2208
c09440f7
SD		 2209 free_rx_sc(rx_sc);
2210 rtnl_unlock();
2211
2212 return 0;
3cf3227a
AT		 2213
2214cleanup:
2215 rtnl_unlock();
2216 return ret;
c09440f7
SD		 2217}
2218
2219static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2220{
2221 struct nlattr **attrs = info->attrs;
2222 struct net_device *dev;
2223 struct macsec_secy *secy;
2224 struct macsec_tx_sc *tx_sc;
2225 struct macsec_tx_sa *tx_sa;
2226 u8 assoc_num;
2227 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2228 int ret;
c09440f7
SD		 2229
2230 if (!attrs[MACSEC_ATTR_IFINDEX])
2231 return -EINVAL;
2232
2233 if (parse_sa_config(attrs, tb_sa))
2234 return -EINVAL;
2235
2236 rtnl_lock();
2237 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2238 &dev, &secy, &tx_sc, &assoc_num);
2239 if (IS_ERR(tx_sa)) {
2240 rtnl_unlock();
2241 return PTR_ERR(tx_sa);
2242 }
2243
2244 if (tx_sa->active) {
2245 rtnl_unlock();
2246 return -EBUSY;
2247 }
2248
3cf3227a
AT		 2249 /* If h/w offloading is available, propagate to the device */
2250 if (macsec_is_offloaded(netdev_priv(dev))) {
2251 const struct macsec_ops *ops;
2252 struct macsec_context ctx;
2253
2254 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2255 if (!ops) {
2256 ret = -EOPNOTSUPP;
2257 goto cleanup;
2258 }
2259
2260 ctx.sa.assoc_num = assoc_num;
2261 ctx.sa.tx_sa = tx_sa;
182879f8 2262 ctx.secy = secy;
3cf3227a
AT		 2263
2264 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2265 if (ret)
2266 goto cleanup;
2267 }
2268
c09440f7
SD		 2269 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2270 clear_tx_sa(tx_sa);
2271
2272 rtnl_unlock();
2273
2274 return 0;
3cf3227a
AT		 2275
2276cleanup:
2277 rtnl_unlock();
2278 return ret;
c09440f7
SD		 2279}
2280
2281static bool validate_upd_sa(struct nlattr **attrs)
2282{
2283 if (!attrs[MACSEC_SA_ATTR_AN] ||
2284 attrs[MACSEC_SA_ATTR_KEY] ||
48ef50fa
EM		 2285 attrs[MACSEC_SA_ATTR_KEYID] ||
2286 attrs[MACSEC_SA_ATTR_SSCI] ||
2287 attrs[MACSEC_SA_ATTR_SALT])
c09440f7
SD		 2288 return false;
2289
2290 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2291 return false;
2292
2293 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2294 return false;
2295
2296 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2297 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2298 return false;
2299 }
2300
2301 return true;
2302}
2303
2304static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2305{
2306 struct nlattr **attrs = info->attrs;
2307 struct net_device *dev;
2308 struct macsec_secy *secy;
2309 struct macsec_tx_sc *tx_sc;
2310 struct macsec_tx_sa *tx_sa;
2311 u8 assoc_num;
2312 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2313 bool was_operational, was_active;
a21ecf0e 2314 pn_t prev_pn;
3cf3227a 2315 int ret = 0;
c09440f7 2316
a21ecf0e
EM		 2317 prev_pn.full64 = 0;
2318
c09440f7
SD		 2319 if (!attrs[MACSEC_ATTR_IFINDEX])
2320 return -EINVAL;
2321
2322 if (parse_sa_config(attrs, tb_sa))
2323 return -EINVAL;
2324
2325 if (!validate_upd_sa(tb_sa))
2326 return -EINVAL;
2327
2328 rtnl_lock();
2329 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2330 &dev, &secy, &tx_sc, &assoc_num);
2331 if (IS_ERR(tx_sa)) {
2332 rtnl_unlock();
2333 return PTR_ERR(tx_sa);
2334 }
2335
2336 if (tb_sa[MACSEC_SA_ATTR_PN]) {
48ef50fa
EM		 2337 int pn_len;
2338
2339 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2340 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2341 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2342 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2343 rtnl_unlock();
2344 return -EINVAL;
2345 }
2346
c09440f7 2347 spin_lock_bh(&tx_sa->lock);
a21ecf0e 2348 prev_pn = tx_sa->next_pn_halves;
48ef50fa 2349 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2350 spin_unlock_bh(&tx_sa->lock);
2351 }
2352
3cf3227a 2353 was_active = tx_sa->active;
c09440f7
SD		 2354 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2355 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2356
3cf3227a 2357 was_operational = secy->operational;
c09440f7
SD		 2358 if (assoc_num == tx_sc->encoding_sa)
2359 secy->operational = tx_sa->active;
2360
3cf3227a
AT		 2361 /* If h/w offloading is available, propagate to the device */
2362 if (macsec_is_offloaded(netdev_priv(dev))) {
2363 const struct macsec_ops *ops;
2364 struct macsec_context ctx;
2365
2366 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2367 if (!ops) {
2368 ret = -EOPNOTSUPP;
2369 goto cleanup;
2370 }
2371
2372 ctx.sa.assoc_num = assoc_num;
2373 ctx.sa.tx_sa = tx_sa;
182879f8 2374 ctx.secy = secy;
3cf3227a
AT		 2375
2376 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2377 if (ret)
2378 goto cleanup;
2379 }
2380
c09440f7
SD		 2381 rtnl_unlock();
2382
2383 return 0;
3cf3227a
AT		 2384
2385cleanup:
2386 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2387 spin_lock_bh(&tx_sa->lock);
a21ecf0e 2388 tx_sa->next_pn_halves = prev_pn;
3cf3227a
AT		 2389 spin_unlock_bh(&tx_sa->lock);
2390 }
2391 tx_sa->active = was_active;
2392 secy->operational = was_operational;
2393 rtnl_unlock();
2394 return ret;
c09440f7
SD		 2395}
2396
2397static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2398{
2399 struct nlattr **attrs = info->attrs;
2400 struct net_device *dev;
2401 struct macsec_secy *secy;
2402 struct macsec_rx_sc *rx_sc;
2403 struct macsec_rx_sa *rx_sa;
2404 u8 assoc_num;
2405 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2406 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2407 bool was_active;
a21ecf0e 2408 pn_t prev_pn;
3cf3227a 2409 int ret = 0;
c09440f7 2410
a21ecf0e
EM		 2411 prev_pn.full64 = 0;
2412
c09440f7
SD		 2413 if (!attrs[MACSEC_ATTR_IFINDEX])
2414 return -EINVAL;
2415
2416 if (parse_rxsc_config(attrs, tb_rxsc))
2417 return -EINVAL;
2418
2419 if (parse_sa_config(attrs, tb_sa))
2420 return -EINVAL;
2421
2422 if (!validate_upd_sa(tb_sa))
2423 return -EINVAL;
2424
2425 rtnl_lock();
2426 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2427 &dev, &secy, &rx_sc, &assoc_num);
2428 if (IS_ERR(rx_sa)) {
2429 rtnl_unlock();
2430 return PTR_ERR(rx_sa);
2431 }
2432
2433 if (tb_sa[MACSEC_SA_ATTR_PN]) {
48ef50fa
EM		 2434 int pn_len;
2435
2436 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2437 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2438 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2439 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2440 rtnl_unlock();
2441 return -EINVAL;
2442 }
2443
c09440f7 2444 spin_lock_bh(&rx_sa->lock);
a21ecf0e 2445 prev_pn = rx_sa->next_pn_halves;
48ef50fa 2446 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2447 spin_unlock_bh(&rx_sa->lock);
2448 }
2449
3cf3227a 2450 was_active = rx_sa->active;
c09440f7
SD		 2451 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2452 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2453
3cf3227a
AT		 2454 /* If h/w offloading is available, propagate to the device */
2455 if (macsec_is_offloaded(netdev_priv(dev))) {
2456 const struct macsec_ops *ops;
2457 struct macsec_context ctx;
2458
2459 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2460 if (!ops) {
2461 ret = -EOPNOTSUPP;
2462 goto cleanup;
2463 }
2464
2465 ctx.sa.assoc_num = assoc_num;
2466 ctx.sa.rx_sa = rx_sa;
182879f8 2467 ctx.secy = secy;
3cf3227a
AT		 2468
2469 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2470 if (ret)
2471 goto cleanup;
2472 }
2473
c09440f7
SD		 2474 rtnl_unlock();
2475 return 0;
3cf3227a
AT		 2476
2477cleanup:
2478 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2479 spin_lock_bh(&rx_sa->lock);
a21ecf0e 2480 rx_sa->next_pn_halves = prev_pn;
3cf3227a
AT		 2481 spin_unlock_bh(&rx_sa->lock);
2482 }
2483 rx_sa->active = was_active;
2484 rtnl_unlock();
2485 return ret;
c09440f7
SD		 2486}
2487
2488static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2489{
2490 struct nlattr **attrs = info->attrs;
2491 struct net_device *dev;
2492 struct macsec_secy *secy;
2493 struct macsec_rx_sc *rx_sc;
2494 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a
AT		 2495 unsigned int prev_n_rx_sc;
2496 bool was_active;
2497 int ret;
c09440f7
SD		 2498
2499 if (!attrs[MACSEC_ATTR_IFINDEX])
2500 return -EINVAL;
2501
2502 if (parse_rxsc_config(attrs, tb_rxsc))
2503 return -EINVAL;
2504
2505 if (!validate_add_rxsc(tb_rxsc))
2506 return -EINVAL;
2507
2508 rtnl_lock();
2509 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2510 if (IS_ERR(rx_sc)) {
2511 rtnl_unlock();
2512 return PTR_ERR(rx_sc);
2513 }
2514
3cf3227a
AT		 2515 was_active = rx_sc->active;
2516 prev_n_rx_sc = secy->n_rx_sc;
c09440f7
SD		 2517 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2518 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2519
2520 if (rx_sc->active != new)
2521 secy->n_rx_sc += new ? 1 : -1;
2522
2523 rx_sc->active = new;
2524 }
2525
3cf3227a
AT		 2526 /* If h/w offloading is available, propagate to the device */
2527 if (macsec_is_offloaded(netdev_priv(dev))) {
2528 const struct macsec_ops *ops;
2529 struct macsec_context ctx;
2530
2531 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2532 if (!ops) {
2533 ret = -EOPNOTSUPP;
2534 goto cleanup;
2535 }
2536
2537 ctx.rx_sc = rx_sc;
182879f8 2538 ctx.secy = secy;
3cf3227a
AT		 2539
2540 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2541 if (ret)
2542 goto cleanup;
2543 }
2544
c09440f7
SD		 2545 rtnl_unlock();
2546
2547 return 0;
3cf3227a
AT		 2548
2549cleanup:
2550 secy->n_rx_sc = prev_n_rx_sc;
2551 rx_sc->active = was_active;
2552 rtnl_unlock();
2553 return ret;
c09440f7
SD		 2554}
2555
dcb780fb
AT		 2556static bool macsec_is_configured(struct macsec_dev *macsec)
2557{
2558 struct macsec_secy *secy = &macsec->secy;
2559 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2560 int i;
2561
2562 if (secy->n_rx_sc > 0)
2563 return true;
2564
2565 for (i = 0; i < MACSEC_NUM_AN; i++)
2566 if (tx_sc->sa[i])
2567 return true;
2568
2569 return false;
2570}
2571
2572static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2573{
2574 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2575 enum macsec_offload offload, prev_offload;
2576 int (*func)(struct macsec_context *ctx);
2577 struct nlattr **attrs = info->attrs;
a249f805 2578 struct net_device *dev;
dcb780fb
AT		 2579 const struct macsec_ops *ops;
2580 struct macsec_context ctx;
2581 struct macsec_dev *macsec;
dcb780fb
AT		 2582 int ret;
2583
2584 if (!attrs[MACSEC_ATTR_IFINDEX])
2585 return -EINVAL;
2586
2587 if (!attrs[MACSEC_ATTR_OFFLOAD])
2588 return -EINVAL;
2589
2590 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2591 attrs[MACSEC_ATTR_OFFLOAD],
2592 macsec_genl_offload_policy, NULL))
2593 return -EINVAL;
2594
2595 dev = get_dev_from_nl(genl_info_net(info), attrs);
2596 if (IS_ERR(dev))
2597 return PTR_ERR(dev);
2598 macsec = macsec_priv(dev);
2599
aa81700c
DC		 2600 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2601 return -EINVAL;
2602
dcb780fb
AT		 2603 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2604 if (macsec->offload == offload)
2605 return 0;
2606
2607 /* Check if the offloading mode is supported by the underlying layers */
2608 if (offload != MACSEC_OFFLOAD_OFF &&
2609 !macsec_check_offload(offload, macsec))
2610 return -EOPNOTSUPP;
2611
dcb780fb
AT		 2612 /* Check if the net device is busy. */
2613 if (netif_running(dev))
2614 return -EBUSY;
2615
2616 rtnl_lock();
2617
2618 prev_offload = macsec->offload;
2619 macsec->offload = offload;
2620
2621 /* Check if the device already has rules configured: we do not support
2622 * rules migration.
2623 */
2624 if (macsec_is_configured(macsec)) {
2625 ret = -EBUSY;
2626 goto rollback;
2627 }
2628
2629 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2630 macsec, &ctx);
2631 if (!ops) {
2632 ret = -EOPNOTSUPP;
2633 goto rollback;
2634 }
2635
2636 if (prev_offload == MACSEC_OFFLOAD_OFF)
2637 func = ops->mdo_add_secy;
2638 else
2639 func = ops->mdo_del_secy;
2640
2641 ctx.secy = &macsec->secy;
2642 ret = macsec_offload(func, &ctx);
2643 if (ret)
2644 goto rollback;
2645
c850240b
MS		 2646 /* Force features update, since they are different for SW MACSec and
2647 * HW offloading cases.
2648 */
2649 netdev_update_features(dev);
29ca3cdf
AT		 2650
2651 rtnl_unlock();
dcb780fb
AT		 2652 return 0;
2653
2654rollback:
2655 macsec->offload = prev_offload;
2656
2657 rtnl_unlock();
2658 return ret;
2659}
2660
b62c3624
DB		 2661static void get_tx_sa_stats(struct net_device *dev, int an,
2662 struct macsec_tx_sa *tx_sa,
2663 struct macsec_tx_sa_stats *sum)
c09440f7 2664{
b62c3624 2665 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2666 int cpu;
2667
b62c3624
DB		 2668 /* If h/w offloading is available, propagate to the device */
2669 if (macsec_is_offloaded(macsec)) {
2670 const struct macsec_ops *ops;
2671 struct macsec_context ctx;
2672
2673 ops = macsec_get_ops(macsec, &ctx);
2674 if (ops) {
2675 ctx.sa.assoc_num = an;
2676 ctx.sa.tx_sa = tx_sa;
2677 ctx.stats.tx_sa_stats = sum;
2678 ctx.secy = &macsec_priv(dev)->secy;
2679 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2680 }
2681 return;
2682 }
2683
c09440f7 2684 for_each_possible_cpu(cpu) {
b62c3624
DB		 2685 const struct macsec_tx_sa_stats *stats =
2686 per_cpu_ptr(tx_sa->stats, cpu);
c09440f7 2687
b62c3624
DB		 2688 sum->OutPktsProtected += stats->OutPktsProtected;
2689 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
c09440f7 2690 }
b62c3624 2691}
c09440f7 2692
b62c3624
DB		 2693static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2694{
2695 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2696 sum->OutPktsProtected) ||
2697 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2698 sum->OutPktsEncrypted))
c09440f7
SD		 2699 return -EMSGSIZE;
2700
2701 return 0;
2702}
2703
b62c3624
DB		 2704static void get_rx_sa_stats(struct net_device *dev,
2705 struct macsec_rx_sc *rx_sc, int an,
2706 struct macsec_rx_sa *rx_sa,
2707 struct macsec_rx_sa_stats *sum)
c09440f7 2708{
b62c3624 2709 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2710 int cpu;
2711
b62c3624
DB		 2712 /* If h/w offloading is available, propagate to the device */
2713 if (macsec_is_offloaded(macsec)) {
2714 const struct macsec_ops *ops;
2715 struct macsec_context ctx;
2716
2717 ops = macsec_get_ops(macsec, &ctx);
2718 if (ops) {
2719 ctx.sa.assoc_num = an;
2720 ctx.sa.rx_sa = rx_sa;
2721 ctx.stats.rx_sa_stats = sum;
2722 ctx.secy = &macsec_priv(dev)->secy;
2723 ctx.rx_sc = rx_sc;
2724 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2725 }
2726 return;
2727 }
2728
c09440f7 2729 for_each_possible_cpu(cpu) {
b62c3624
DB		 2730 const struct macsec_rx_sa_stats *stats =
2731 per_cpu_ptr(rx_sa->stats, cpu);
c09440f7 2732
b62c3624
DB		 2733 sum->InPktsOK += stats->InPktsOK;
2734 sum->InPktsInvalid += stats->InPktsInvalid;
2735 sum->InPktsNotValid += stats->InPktsNotValid;
2736 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2737 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
c09440f7 2738 }
b62c3624 2739}
c09440f7 2740
b62c3624
DB		 2741static int copy_rx_sa_stats(struct sk_buff *skb,
2742 struct macsec_rx_sa_stats *sum)
2743{
2744 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2745 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2746 sum->InPktsInvalid) ||
2747 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2748 sum->InPktsNotValid) ||
2749 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2750 sum->InPktsNotUsingSA) ||
2751 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2752 sum->InPktsUnusedSA))
c09440f7
SD		 2753 return -EMSGSIZE;
2754
2755 return 0;
2756}
2757
b62c3624
DB		 2758static void get_rx_sc_stats(struct net_device *dev,
2759 struct macsec_rx_sc *rx_sc,
2760 struct macsec_rx_sc_stats *sum)
c09440f7 2761{
b62c3624 2762 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2763 int cpu;
2764
b62c3624
DB		 2765 /* If h/w offloading is available, propagate to the device */
2766 if (macsec_is_offloaded(macsec)) {
2767 const struct macsec_ops *ops;
2768 struct macsec_context ctx;
2769
2770 ops = macsec_get_ops(macsec, &ctx);
2771 if (ops) {
2772 ctx.stats.rx_sc_stats = sum;
2773 ctx.secy = &macsec_priv(dev)->secy;
2774 ctx.rx_sc = rx_sc;
2775 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2776 }
2777 return;
2778 }
2779
c09440f7
SD		 2780 for_each_possible_cpu(cpu) {
2781 const struct pcpu_rx_sc_stats *stats;
2782 struct macsec_rx_sc_stats tmp;
2783 unsigned int start;
2784
b62c3624 2785 stats = per_cpu_ptr(rx_sc->stats, cpu);
c09440f7
SD		 2786 do {
2787 start = u64_stats_fetch_begin_irq(&stats->syncp);
2788 memcpy(&tmp, &stats->stats, sizeof(tmp));
2789 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2790
b62c3624
DB		 2791 sum->InOctetsValidated += tmp.InOctetsValidated;
2792 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2793 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2794 sum->InPktsDelayed += tmp.InPktsDelayed;
2795 sum->InPktsOK += tmp.InPktsOK;
2796 sum->InPktsInvalid += tmp.InPktsInvalid;
2797 sum->InPktsLate += tmp.InPktsLate;
2798 sum->InPktsNotValid += tmp.InPktsNotValid;
2799 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2800 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
c09440f7 2801 }
b62c3624 2802}
c09440f7 2803
b62c3624
DB		 2804static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2805{
f60d94c0 2806 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
b62c3624 2807 sum->InOctetsValidated,
f60d94c0
ND		 2808 MACSEC_RXSC_STATS_ATTR_PAD) ||
2809 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
b62c3624 2810 sum->InOctetsDecrypted,
f60d94c0
ND		 2811 MACSEC_RXSC_STATS_ATTR_PAD) ||
2812 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
b62c3624 2813 sum->InPktsUnchecked,
f60d94c0
ND		 2814 MACSEC_RXSC_STATS_ATTR_PAD) ||
2815 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
b62c3624 2816 sum->InPktsDelayed,
f60d94c0
ND		 2817 MACSEC_RXSC_STATS_ATTR_PAD) ||
2818 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
b62c3624 2819 sum->InPktsOK,
f60d94c0
ND		 2820 MACSEC_RXSC_STATS_ATTR_PAD) ||
2821 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
b62c3624 2822 sum->InPktsInvalid,
f60d94c0
ND		 2823 MACSEC_RXSC_STATS_ATTR_PAD) ||
2824 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
b62c3624 2825 sum->InPktsLate,
f60d94c0
ND		 2826 MACSEC_RXSC_STATS_ATTR_PAD) ||
2827 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
b62c3624 2828 sum->InPktsNotValid,
f60d94c0
ND		 2829 MACSEC_RXSC_STATS_ATTR_PAD) ||
2830 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
b62c3624 2831 sum->InPktsNotUsingSA,
f60d94c0
ND		 2832 MACSEC_RXSC_STATS_ATTR_PAD) ||
2833 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
b62c3624 2834 sum->InPktsUnusedSA,
f60d94c0 2835 MACSEC_RXSC_STATS_ATTR_PAD))
c09440f7
SD		 2836 return -EMSGSIZE;
2837
2838 return 0;
2839}
2840
b62c3624
DB		 2841static void get_tx_sc_stats(struct net_device *dev,
2842 struct macsec_tx_sc_stats *sum)
c09440f7 2843{
b62c3624 2844 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2845 int cpu;
2846
b62c3624
DB		 2847 /* If h/w offloading is available, propagate to the device */
2848 if (macsec_is_offloaded(macsec)) {
2849 const struct macsec_ops *ops;
2850 struct macsec_context ctx;
2851
2852 ops = macsec_get_ops(macsec, &ctx);
2853 if (ops) {
2854 ctx.stats.tx_sc_stats = sum;
2855 ctx.secy = &macsec_priv(dev)->secy;
2856 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2857 }
2858 return;
2859 }
2860
c09440f7
SD		 2861 for_each_possible_cpu(cpu) {
2862 const struct pcpu_tx_sc_stats *stats;
2863 struct macsec_tx_sc_stats tmp;
2864 unsigned int start;
2865
b62c3624 2866 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
c09440f7
SD		 2867 do {
2868 start = u64_stats_fetch_begin_irq(&stats->syncp);
2869 memcpy(&tmp, &stats->stats, sizeof(tmp));
2870 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2871
b62c3624
DB		 2872 sum->OutPktsProtected += tmp.OutPktsProtected;
2873 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2874 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2875 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
c09440f7 2876 }
b62c3624 2877}
c09440f7 2878
b62c3624
DB		 2879static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2880{
f60d94c0 2881 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
b62c3624 2882 sum->OutPktsProtected,
f60d94c0
ND		 2883 MACSEC_TXSC_STATS_ATTR_PAD) ||
2884 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
b62c3624 2885 sum->OutPktsEncrypted,
f60d94c0
ND		 2886 MACSEC_TXSC_STATS_ATTR_PAD) ||
2887 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
b62c3624 2888 sum->OutOctetsProtected,
f60d94c0
ND		 2889 MACSEC_TXSC_STATS_ATTR_PAD) ||
2890 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
b62c3624 2891 sum->OutOctetsEncrypted,
f60d94c0 2892 MACSEC_TXSC_STATS_ATTR_PAD))
c09440f7
SD		 2893 return -EMSGSIZE;
2894
2895 return 0;
2896}
2897
b62c3624 2898static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
c09440f7 2899{
b62c3624 2900 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2901 int cpu;
2902
b62c3624
DB		 2903 /* If h/w offloading is available, propagate to the device */
2904 if (macsec_is_offloaded(macsec)) {
2905 const struct macsec_ops *ops;
2906 struct macsec_context ctx;
2907
2908 ops = macsec_get_ops(macsec, &ctx);
2909 if (ops) {
2910 ctx.stats.dev_stats = sum;
2911 ctx.secy = &macsec_priv(dev)->secy;
2912 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2913 }
2914 return;
2915 }
2916
c09440f7
SD		 2917 for_each_possible_cpu(cpu) {
2918 const struct pcpu_secy_stats *stats;
2919 struct macsec_dev_stats tmp;
2920 unsigned int start;
2921
b62c3624 2922 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
c09440f7
SD		 2923 do {
2924 start = u64_stats_fetch_begin_irq(&stats->syncp);
2925 memcpy(&tmp, &stats->stats, sizeof(tmp));
2926 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2927
b62c3624
DB		 2928 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2929 sum->InPktsUntagged += tmp.InPktsUntagged;
2930 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2931 sum->InPktsNoTag += tmp.InPktsNoTag;
2932 sum->InPktsBadTag += tmp.InPktsBadTag;
2933 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2934 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2935 sum->InPktsOverrun += tmp.InPktsOverrun;
c09440f7 2936 }
b62c3624 2937}
c09440f7 2938
b62c3624
DB		 2939static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2940{
f60d94c0 2941 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
b62c3624 2942 sum->OutPktsUntagged,
f60d94c0
ND		 2943 MACSEC_SECY_STATS_ATTR_PAD) ||
2944 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
b62c3624 2945 sum->InPktsUntagged,
f60d94c0
ND		 2946 MACSEC_SECY_STATS_ATTR_PAD) ||
2947 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
b62c3624 2948 sum->OutPktsTooLong,
f60d94c0
ND		 2949 MACSEC_SECY_STATS_ATTR_PAD) ||
2950 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
b62c3624 2951 sum->InPktsNoTag,
f60d94c0
ND		 2952 MACSEC_SECY_STATS_ATTR_PAD) ||
2953 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
b62c3624 2954 sum->InPktsBadTag,
f60d94c0
ND		 2955 MACSEC_SECY_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
b62c3624 2957 sum->InPktsUnknownSCI,
f60d94c0
ND		 2958 MACSEC_SECY_STATS_ATTR_PAD) ||
2959 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
b62c3624 2960 sum->InPktsNoSCI,
f60d94c0
ND		 2961 MACSEC_SECY_STATS_ATTR_PAD) ||
2962 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
b62c3624 2963 sum->InPktsOverrun,
f60d94c0 2964 MACSEC_SECY_STATS_ATTR_PAD))
c09440f7
SD		 2965 return -EMSGSIZE;
2966
2967 return 0;
2968}
2969
2970static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2971{
2972 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ae0be8de
MK		 2973 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2974 MACSEC_ATTR_SECY);
ccfdec90 2975 u64 csid;
c09440f7
SD		 2976
2977 if (!secy_nest)
2978 return 1;
2979
ccfdec90
FW		 2980 switch (secy->key_len) {
2981 case MACSEC_GCM_AES_128_SAK_LEN:
48ef50fa 2982 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 2983 break;
2984 case MACSEC_GCM_AES_256_SAK_LEN:
48ef50fa 2985 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
ccfdec90
FW		 2986 break;
2987 default:
2988 goto cancel;
2989 }
2990
f60d94c0
ND		 2991 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2992 MACSEC_SECY_ATTR_PAD) ||
2993 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
ccfdec90 2994 csid, MACSEC_SECY_ATTR_PAD) ||
c09440f7
SD		 2995 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2996 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2997 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2998 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2999 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3000 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3001 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3002 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3003 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3005 goto cancel;
3006
3007 if (secy->replay_protect) {
3008 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3009 goto cancel;
3010 }
3011
3012 nla_nest_end(skb, secy_nest);
3013 return 0;
3014
3015cancel:
3016 nla_nest_cancel(skb, secy_nest);
3017 return 1;
3018}
3019
e1427237
FW		 3020static noinline_for_stack int
3021dump_secy(struct macsec_secy *secy, struct net_device *dev,
3022 struct sk_buff *skb, struct netlink_callback *cb)
c09440f7 3023{
b62c3624
DB		 3024 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3025 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3026 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3027 struct macsec_rx_sa_stats rx_sa_stats = {0, };
dcb780fb 3028 struct macsec_dev *macsec = netdev_priv(dev);
b62c3624 3029 struct macsec_dev_stats dev_stats = {0, };
c09440f7
SD		 3030 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3031 struct nlattr *txsa_list, *rxsc_list;
dcb780fb 3032 struct macsec_rx_sc *rx_sc;
c09440f7 3033 struct nlattr *attr;
dcb780fb
AT		 3034 void *hdr;
3035 int i, j;
c09440f7
SD		 3036
3037 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3038 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3039 if (!hdr)
3040 return -EMSGSIZE;
3041
0a833c29 3042 genl_dump_check_consistent(cb, hdr);
c09440f7
SD		 3043
3044 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3045 goto nla_put_failure;
3046
dcb780fb
AT		 3047 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3048 if (!attr)
3049 goto nla_put_failure;
3050 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3051 goto nla_put_failure;
3052 nla_nest_end(skb, attr);
3053
c09440f7
SD		 3054 if (nla_put_secy(secy, skb))
3055 goto nla_put_failure;
3056
ae0be8de 3057 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
c09440f7
SD		 3058 if (!attr)
3059 goto nla_put_failure;
b62c3624
DB		 3060
3061 get_tx_sc_stats(dev, &tx_sc_stats);
3062 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
c09440f7
SD		 3063 nla_nest_cancel(skb, attr);
3064 goto nla_put_failure;
3065 }
3066 nla_nest_end(skb, attr);
3067
ae0be8de 3068 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
c09440f7
SD		 3069 if (!attr)
3070 goto nla_put_failure;
b62c3624
DB		 3071 get_secy_stats(dev, &dev_stats);
3072 if (copy_secy_stats(skb, &dev_stats)) {
c09440f7
SD		 3073 nla_nest_cancel(skb, attr);
3074 goto nla_put_failure;
3075 }
3076 nla_nest_end(skb, attr);
3077
ae0be8de 3078 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
c09440f7
SD		 3079 if (!txsa_list)
3080 goto nla_put_failure;
3081 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3082 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3083 struct nlattr *txsa_nest;
48ef50fa
EM		 3084 u64 pn;
3085 int pn_len;
c09440f7
SD		 3086
3087 if (!tx_sa)
3088 continue;
3089
ae0be8de 3090 txsa_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 3091 if (!txsa_nest) {
3092 nla_nest_cancel(skb, txsa_list);
3093 goto nla_put_failure;
3094 }
3095
b62c3624
DB		 3096 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3097 if (!attr) {
3098 nla_nest_cancel(skb, txsa_nest);
3099 nla_nest_cancel(skb, txsa_list);
3100 goto nla_put_failure;
3101 }
3102 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3103 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3104 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3105 nla_nest_cancel(skb, attr);
3106 nla_nest_cancel(skb, txsa_nest);
3107 nla_nest_cancel(skb, txsa_list);
3108 goto nla_put_failure;
3109 }
3110 nla_nest_end(skb, attr);
3111
48ef50fa
EM		 3112 if (secy->xpn) {
3113 pn = tx_sa->next_pn;
3114 pn_len = MACSEC_XPN_PN_LEN;
3115 } else {
3116 pn = tx_sa->next_pn_halves.lower;
3117 pn_len = MACSEC_DEFAULT_PN_LEN;
3118 }
3119
c09440f7 3120 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
48ef50fa 3121 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
8acca6ac 3122 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
48ef50fa 3123 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
c09440f7
SD		 3124 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3125 nla_nest_cancel(skb, txsa_nest);
3126 nla_nest_cancel(skb, txsa_list);
3127 goto nla_put_failure;
3128 }
3129
c09440f7
SD		 3130 nla_nest_end(skb, txsa_nest);
3131 }
3132 nla_nest_end(skb, txsa_list);
3133
ae0be8de 3134 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
c09440f7
SD		 3135 if (!rxsc_list)
3136 goto nla_put_failure;
3137
3138 j = 1;
3139 for_each_rxsc_rtnl(secy, rx_sc) {
3140 int k;
3141 struct nlattr *rxsa_list;
ae0be8de 3142 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 3143
3144 if (!rxsc_nest) {
3145 nla_nest_cancel(skb, rxsc_list);
3146 goto nla_put_failure;
3147 }
3148
3149 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
f60d94c0
ND		 3150 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3151 MACSEC_RXSC_ATTR_PAD)) {
c09440f7
SD		 3152 nla_nest_cancel(skb, rxsc_nest);
3153 nla_nest_cancel(skb, rxsc_list);
3154 goto nla_put_failure;
3155 }
3156
ae0be8de 3157 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
c09440f7
SD		 3158 if (!attr) {
3159 nla_nest_cancel(skb, rxsc_nest);
3160 nla_nest_cancel(skb, rxsc_list);
3161 goto nla_put_failure;
3162 }
b62c3624
DB		 3163 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3164 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3165 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
c09440f7
SD		 3166 nla_nest_cancel(skb, attr);
3167 nla_nest_cancel(skb, rxsc_nest);
3168 nla_nest_cancel(skb, rxsc_list);
3169 goto nla_put_failure;
3170 }
3171 nla_nest_end(skb, attr);
3172
ae0be8de
MK		 3173 rxsa_list = nla_nest_start_noflag(skb,
3174 MACSEC_RXSC_ATTR_SA_LIST);
c09440f7
SD		 3175 if (!rxsa_list) {
3176 nla_nest_cancel(skb, rxsc_nest);
3177 nla_nest_cancel(skb, rxsc_list);
3178 goto nla_put_failure;
3179 }
3180
3181 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3182 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3183 struct nlattr *rxsa_nest;
48ef50fa
EM		 3184 u64 pn;
3185 int pn_len;
c09440f7
SD		 3186
3187 if (!rx_sa)
3188 continue;
3189
ae0be8de 3190 rxsa_nest = nla_nest_start_noflag(skb, k++);
c09440f7
SD		 3191 if (!rxsa_nest) {
3192 nla_nest_cancel(skb, rxsa_list);
3193 nla_nest_cancel(skb, rxsc_nest);
3194 nla_nest_cancel(skb, rxsc_list);
3195 goto nla_put_failure;
3196 }
3197
ae0be8de
MK		 3198 attr = nla_nest_start_noflag(skb,
3199 MACSEC_SA_ATTR_STATS);
c09440f7
SD		 3200 if (!attr) {
3201 nla_nest_cancel(skb, rxsa_list);
3202 nla_nest_cancel(skb, rxsc_nest);
3203 nla_nest_cancel(skb, rxsc_list);
3204 goto nla_put_failure;
3205 }
b62c3624
DB		 3206 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3207 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3208 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
c09440f7
SD		 3209 nla_nest_cancel(skb, attr);
3210 nla_nest_cancel(skb, rxsa_list);
3211 nla_nest_cancel(skb, rxsc_nest);
3212 nla_nest_cancel(skb, rxsc_list);
3213 goto nla_put_failure;
3214 }
3215 nla_nest_end(skb, attr);
3216
48ef50fa
EM		 3217 if (secy->xpn) {
3218 pn = rx_sa->next_pn;
3219 pn_len = MACSEC_XPN_PN_LEN;
3220 } else {
3221 pn = rx_sa->next_pn_halves.lower;
3222 pn_len = MACSEC_DEFAULT_PN_LEN;
3223 }
3224
c09440f7 3225 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
48ef50fa 3226 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
8acca6ac 3227 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
48ef50fa 3228 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
c09440f7
SD		 3229 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3230 nla_nest_cancel(skb, rxsa_nest);
3231 nla_nest_cancel(skb, rxsc_nest);
3232 nla_nest_cancel(skb, rxsc_list);
3233 goto nla_put_failure;
3234 }
3235 nla_nest_end(skb, rxsa_nest);
3236 }
3237
3238 nla_nest_end(skb, rxsa_list);
3239 nla_nest_end(skb, rxsc_nest);
3240 }
3241
3242 nla_nest_end(skb, rxsc_list);
3243
c09440f7
SD		 3244 genlmsg_end(skb, hdr);
3245
3246 return 0;
3247
3248nla_put_failure:
c09440f7
SD		 3249 genlmsg_cancel(skb, hdr);
3250 return -EMSGSIZE;
3251}
3252
96cfc505
SD		 3253static int macsec_generation = 1; /* protected by RTNL */
3254
c09440f7
SD		 3255static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3256{
3257 struct net *net = sock_net(skb->sk);
3258 struct net_device *dev;
3259 int dev_idx, d;
3260
3261 dev_idx = cb->args[0];
3262
3263 d = 0;
c10c63ea 3264 rtnl_lock();
96cfc505
SD		 3265
3266 cb->seq = macsec_generation;
3267
c09440f7
SD		 3268 for_each_netdev(net, dev) {
3269 struct macsec_secy *secy;
3270
3271 if (d < dev_idx)
3272 goto next;
3273
3274 if (!netif_is_macsec(dev))
3275 goto next;
3276
3277 secy = &macsec_priv(dev)->secy;
3278 if (dump_secy(secy, dev, skb, cb) < 0)
3279 goto done;
3280next:
3281 d++;
3282 }
3283
3284done:
c10c63ea 3285 rtnl_unlock();
c09440f7
SD		 3286 cb->args[0] = d;
3287 return skb->len;
3288}
3289
66a9b928 3290static const struct genl_small_ops macsec_genl_ops[] = {
c09440f7
SD		 3291 {
3292 .cmd = MACSEC_CMD_GET_TXSC,
ef6243ac 3293 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3294 .dumpit = macsec_dump_txsc,
c09440f7
SD		 3295 },
3296 {
3297 .cmd = MACSEC_CMD_ADD_RXSC,
ef6243ac 3298 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3299 .doit = macsec_add_rxsc,
c09440f7
SD		 3300 .flags = GENL_ADMIN_PERM,
3301 },
3302 {
3303 .cmd = MACSEC_CMD_DEL_RXSC,
ef6243ac 3304 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3305 .doit = macsec_del_rxsc,
c09440f7
SD		 3306 .flags = GENL_ADMIN_PERM,
3307 },
3308 {
3309 .cmd = MACSEC_CMD_UPD_RXSC,
ef6243ac 3310 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3311 .doit = macsec_upd_rxsc,
c09440f7
SD		 3312 .flags = GENL_ADMIN_PERM,
3313 },
3314 {
3315 .cmd = MACSEC_CMD_ADD_TXSA,
ef6243ac 3316 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3317 .doit = macsec_add_txsa,
c09440f7
SD		 3318 .flags = GENL_ADMIN_PERM,
3319 },
3320 {
3321 .cmd = MACSEC_CMD_DEL_TXSA,
ef6243ac 3322 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3323 .doit = macsec_del_txsa,
c09440f7
SD		 3324 .flags = GENL_ADMIN_PERM,
3325 },
3326 {
3327 .cmd = MACSEC_CMD_UPD_TXSA,
ef6243ac 3328 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3329 .doit = macsec_upd_txsa,
c09440f7
SD		 3330 .flags = GENL_ADMIN_PERM,
3331 },
3332 {
3333 .cmd = MACSEC_CMD_ADD_RXSA,
ef6243ac 3334 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3335 .doit = macsec_add_rxsa,
c09440f7
SD		 3336 .flags = GENL_ADMIN_PERM,
3337 },
3338 {
3339 .cmd = MACSEC_CMD_DEL_RXSA,
ef6243ac 3340 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3341 .doit = macsec_del_rxsa,
c09440f7
SD		 3342 .flags = GENL_ADMIN_PERM,
3343 },
3344 {
3345 .cmd = MACSEC_CMD_UPD_RXSA,
ef6243ac 3346 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3347 .doit = macsec_upd_rxsa,
c09440f7
SD		 3348 .flags = GENL_ADMIN_PERM,
3349 },
dcb780fb
AT		 3350 {
3351 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3352 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3353 .doit = macsec_upd_offload,
3354 .flags = GENL_ADMIN_PERM,
3355 },
c09440f7
SD		 3356};
3357
56989f6d 3358static struct genl_family macsec_fam __ro_after_init = {
489111e5
JB		 3359 .name = MACSEC_GENL_NAME,
3360 .hdrsize = 0,
3361 .version = MACSEC_GENL_VERSION,
3362 .maxattr = MACSEC_ATTR_MAX,
3b0f31f2 3363 .policy = macsec_genl_policy,
489111e5
JB		 3364 .netnsok = true,
3365 .module = THIS_MODULE,
66a9b928
JK		 3366 .small_ops = macsec_genl_ops,
3367 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
489111e5
JB		 3368};
3369
c09440f7
SD		 3370static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3371 struct net_device *dev)
3372{
3373 struct macsec_dev *macsec = netdev_priv(dev);
3374 struct macsec_secy *secy = &macsec->secy;
3375 struct pcpu_secy_stats *secy_stats;
3376 int ret, len;
3377
3cf3227a
AT		 3378 if (macsec_is_offloaded(netdev_priv(dev))) {
3379 skb->dev = macsec->real_dev;
3380 return dev_queue_xmit(skb);
3381 }
3382
c09440f7
SD		 3383 /* 10.5 */
3384 if (!secy->protect_frames) {
3385 secy_stats = this_cpu_ptr(macsec->stats);
3386 u64_stats_update_begin(&secy_stats->syncp);
3387 secy_stats->stats.OutPktsUntagged++;
3388 u64_stats_update_end(&secy_stats->syncp);
79c62220 3389 skb->dev = macsec->real_dev;
c09440f7
SD		 3390 len = skb->len;
3391 ret = dev_queue_xmit(skb);
3392 count_tx(dev, ret, len);
3393 return ret;
3394 }
3395
3396 if (!secy->operational) {
3397 kfree_skb(skb);
3398 dev->stats.tx_dropped++;
3399 return NETDEV_TX_OK;
3400 }
3401
3402 skb = macsec_encrypt(skb, dev);
3403 if (IS_ERR(skb)) {
3404 if (PTR_ERR(skb) != -EINPROGRESS)
3405 dev->stats.tx_dropped++;
3406 return NETDEV_TX_OK;
3407 }
3408
3409 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3410
3411 macsec_encrypt_finish(skb, dev);
3412 len = skb->len;
3413 ret = dev_queue_xmit(skb);
3414 count_tx(dev, ret, len);
3415 return ret;
3416}
3417
c850240b 3418#define SW_MACSEC_FEATURES \
c09440f7 3419 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
e2003872 3420
c850240b
MS		 3421/* If h/w offloading is enabled, use real device features save for
3422 * VLAN_FEATURES - they require additional ops
3423 * HW_MACSEC - no reason to report it
3424 */
3425#define REAL_DEV_FEATURES(dev) \
3426 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3427
c09440f7
SD		 3428static int macsec_dev_init(struct net_device *dev)
3429{
3430 struct macsec_dev *macsec = macsec_priv(dev);
3431 struct net_device *real_dev = macsec->real_dev;
5491e7c6 3432 int err;
c09440f7
SD		 3433
3434 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3435 if (!dev->tstats)
3436 return -ENOMEM;
3437
5491e7c6
PA		 3438 err = gro_cells_init(&macsec->gro_cells, dev);
3439 if (err) {
3440 free_percpu(dev->tstats);
3441 return err;
3442 }
3443
c850240b
MS		 3444 if (macsec_is_offloaded(macsec)) {
3445 dev->features = REAL_DEV_FEATURES(real_dev);
3446 } else {
3447 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3448 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3449 }
c09440f7
SD		 3450
3451 dev->needed_headroom = real_dev->needed_headroom +
3452 MACSEC_NEEDED_HEADROOM;
3453 dev->needed_tailroom = real_dev->needed_tailroom +
3454 MACSEC_NEEDED_TAILROOM;
3455
3456 if (is_zero_ether_addr(dev->dev_addr))
3457 eth_hw_addr_inherit(dev, real_dev);
3458 if (is_zero_ether_addr(dev->broadcast))
3459 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3460
3461 return 0;
3462}
3463
3464static void macsec_dev_uninit(struct net_device *dev)
3465{
5491e7c6
PA		 3466 struct macsec_dev *macsec = macsec_priv(dev);
3467
3468 gro_cells_destroy(&macsec->gro_cells);
c09440f7
SD		 3469 free_percpu(dev->tstats);
3470}
3471
3472static netdev_features_t macsec_fix_features(struct net_device *dev,
3473 netdev_features_t features)
3474{
3475 struct macsec_dev *macsec = macsec_priv(dev);
3476 struct net_device *real_dev = macsec->real_dev;
3477
c850240b
MS		 3478 if (macsec_is_offloaded(macsec))
3479 return REAL_DEV_FEATURES(real_dev);
3480
3481 features &= (real_dev->features & SW_MACSEC_FEATURES) |
5491e7c6
PA		 3482 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3483 features |= NETIF_F_LLTX;
c09440f7
SD		 3484
3485 return features;
3486}
3487
3488static int macsec_dev_open(struct net_device *dev)
3489{
3490 struct macsec_dev *macsec = macsec_priv(dev);
3491 struct net_device *real_dev = macsec->real_dev;
3492 int err;
3493
c09440f7
SD		 3494 err = dev_uc_add(real_dev, dev->dev_addr);
3495 if (err < 0)
3496 return err;
3497
3498 if (dev->flags & IFF_ALLMULTI) {
3499 err = dev_set_allmulti(real_dev, 1);
3500 if (err < 0)
3501 goto del_unicast;
3502 }
3503
3504 if (dev->flags & IFF_PROMISC) {
3505 err = dev_set_promiscuity(real_dev, 1);
3506 if (err < 0)
3507 goto clear_allmulti;
3508 }
3509
3cf3227a
AT		 3510 /* If h/w offloading is available, propagate to the device */
3511 if (macsec_is_offloaded(macsec)) {
3512 const struct macsec_ops *ops;
3513 struct macsec_context ctx;
3514
3515 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3516 if (!ops) {
3517 err = -EOPNOTSUPP;
3518 goto clear_allmulti;
3519 }
3520
182879f8 3521 ctx.secy = &macsec->secy;
3cf3227a
AT		 3522 err = macsec_offload(ops->mdo_dev_open, &ctx);
3523 if (err)
3524 goto clear_allmulti;
3525 }
3526
c09440f7
SD		 3527 if (netif_carrier_ok(real_dev))
3528 netif_carrier_on(dev);
3529
3530 return 0;
3531clear_allmulti:
3532 if (dev->flags & IFF_ALLMULTI)
3533 dev_set_allmulti(real_dev, -1);
3534del_unicast:
3535 dev_uc_del(real_dev, dev->dev_addr);
3536 netif_carrier_off(dev);
3537 return err;
3538}
3539
3540static int macsec_dev_stop(struct net_device *dev)
3541{
3542 struct macsec_dev *macsec = macsec_priv(dev);
3543 struct net_device *real_dev = macsec->real_dev;
3544
3545 netif_carrier_off(dev);
3546
3cf3227a
AT		 3547 /* If h/w offloading is available, propagate to the device */
3548 if (macsec_is_offloaded(macsec)) {
3549 const struct macsec_ops *ops;
3550 struct macsec_context ctx;
3551
3552 ops = macsec_get_ops(macsec, &ctx);
182879f8
DB		 3553 if (ops) {
3554 ctx.secy = &macsec->secy;
3cf3227a 3555 macsec_offload(ops->mdo_dev_stop, &ctx);
182879f8 3556 }
3cf3227a
AT		 3557 }
3558
c09440f7
SD		 3559 dev_mc_unsync(real_dev, dev);
3560 dev_uc_unsync(real_dev, dev);
3561
3562 if (dev->flags & IFF_ALLMULTI)
3563 dev_set_allmulti(real_dev, -1);
3564
3565 if (dev->flags & IFF_PROMISC)
3566 dev_set_promiscuity(real_dev, -1);
3567
3568 dev_uc_del(real_dev, dev->dev_addr);
3569
3570 return 0;
3571}
3572
3573static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3574{
3575 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3576
3577 if (!(dev->flags & IFF_UP))
3578 return;
3579
3580 if (change & IFF_ALLMULTI)
3581 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3582
3583 if (change & IFF_PROMISC)
3584 dev_set_promiscuity(real_dev,
3585 dev->flags & IFF_PROMISC ? 1 : -1);
3586}
3587
3588static void macsec_dev_set_rx_mode(struct net_device *dev)
3589{
3590 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3591
3592 dev_mc_sync(real_dev, dev);
3593 dev_uc_sync(real_dev, dev);
3594}
3595
3596static int macsec_set_mac_address(struct net_device *dev, void *p)
3597{
3598 struct macsec_dev *macsec = macsec_priv(dev);
3599 struct net_device *real_dev = macsec->real_dev;
3600 struct sockaddr *addr = p;
3601 int err;
3602
3603 if (!is_valid_ether_addr(addr->sa_data))
3604 return -EADDRNOTAVAIL;
3605
3606 if (!(dev->flags & IFF_UP))
3607 goto out;
3608
3609 err = dev_uc_add(real_dev, addr->sa_data);
3610 if (err < 0)
3611 return err;
3612
3613 dev_uc_del(real_dev, dev->dev_addr);
3614
3615out:
3616 ether_addr_copy(dev->dev_addr, addr->sa_data);
6fc498bc 3617 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
09f4136c
DB		 3618
3619 /* If h/w offloading is available, propagate to the device */
3620 if (macsec_is_offloaded(macsec)) {
3621 const struct macsec_ops *ops;
3622 struct macsec_context ctx;
3623
3624 ops = macsec_get_ops(macsec, &ctx);
3625 if (ops) {
3626 ctx.secy = &macsec->secy;
3627 macsec_offload(ops->mdo_upd_secy, &ctx);
3628 }
3629 }
3630
c09440f7
SD		 3631 return 0;
3632}
3633
3634static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3635{
3636 struct macsec_dev *macsec = macsec_priv(dev);
3637 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3638
3639 if (macsec->real_dev->mtu - extra < new_mtu)
3640 return -ERANGE;
3641
3642 dev->mtu = new_mtu;
3643
3644 return 0;
3645}
3646
bc1f4470 3647static void macsec_get_stats64(struct net_device *dev,
3648 struct rtnl_link_stats64 *s)
c09440f7 3649{
c09440f7 3650 if (!dev->tstats)
bc1f4470 3651 return;
c09440f7 3652
9d015167 3653 dev_fetch_sw_netstats(s, dev->tstats);
c09440f7
SD		 3654
3655 s->rx_dropped = dev->stats.rx_dropped;
3656 s->tx_dropped = dev->stats.tx_dropped;
c09440f7
SD		 3657}
3658
3659static int macsec_get_iflink(const struct net_device *dev)
3660{
3661 return macsec_priv(dev)->real_dev->ifindex;
3662}
3663
3664static const struct net_device_ops macsec_netdev_ops = {
3665 .ndo_init = macsec_dev_init,
3666 .ndo_uninit = macsec_dev_uninit,
3667 .ndo_open = macsec_dev_open,
3668 .ndo_stop = macsec_dev_stop,
3669 .ndo_fix_features = macsec_fix_features,
3670 .ndo_change_mtu = macsec_change_mtu,
3671 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3672 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3673 .ndo_set_mac_address = macsec_set_mac_address,
3674 .ndo_start_xmit = macsec_start_xmit,
3675 .ndo_get_stats64 = macsec_get_stats64,
3676 .ndo_get_iflink = macsec_get_iflink,
3677};
3678
3679static const struct device_type macsec_type = {
3680 .name = "macsec",
3681};
3682
3683static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3684 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
31d9a1c5 3685 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
c09440f7
SD		 3686 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3687 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3688 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3689 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3690 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3691 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3692 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3693 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3694 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3697};
3698
3699static void macsec_free_netdev(struct net_device *dev)
3700{
3701 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 3702
3703 free_percpu(macsec->stats);
3704 free_percpu(macsec->secy.tx_sc.stats);
3705
c09440f7
SD		 3706}
3707
3708static void macsec_setup(struct net_device *dev)
3709{
3710 ether_setup(dev);
91572088
JW		 3711 dev->min_mtu = 0;
3712 dev->max_mtu = ETH_MAX_MTU;
e425974f 3713 dev->priv_flags |= IFF_NO_QUEUE;
c09440f7 3714 dev->netdev_ops = &macsec_netdev_ops;
cf124db5
DM		 3715 dev->needs_free_netdev = true;
3716 dev->priv_destructor = macsec_free_netdev;
c24acf03 3717 SET_NETDEV_DEVTYPE(dev, &macsec_type);
c09440f7
SD		 3718
3719 eth_zero_addr(dev->broadcast);
3720}
3721
ccfdec90
FW		 3722static int macsec_changelink_common(struct net_device *dev,
3723 struct nlattr *data[])
c09440f7
SD		 3724{
3725 struct macsec_secy *secy;
3726 struct macsec_tx_sc *tx_sc;
3727
3728 secy = &macsec_priv(dev)->secy;
3729 tx_sc = &secy->tx_sc;
3730
3731 if (data[IFLA_MACSEC_ENCODING_SA]) {
3732 struct macsec_tx_sa *tx_sa;
3733
3734 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3735 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3736
3737 secy->operational = tx_sa && tx_sa->active;
3738 }
3739
3740 if (data[IFLA_MACSEC_WINDOW])
3741 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3742
3743 if (data[IFLA_MACSEC_ENCRYPT])
3744 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3745
3746 if (data[IFLA_MACSEC_PROTECT])
3747 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3748
3749 if (data[IFLA_MACSEC_INC_SCI])
3750 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3751
3752 if (data[IFLA_MACSEC_ES])
3753 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3754
3755 if (data[IFLA_MACSEC_SCB])
3756 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3757
3758 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3759 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3760
3761 if (data[IFLA_MACSEC_VALIDATION])
3762 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
ccfdec90
FW		 3763
3764 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3765 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3766 case MACSEC_CIPHER_ID_GCM_AES_128:
e8660ded 3767 case MACSEC_DEFAULT_CIPHER_ID:
ccfdec90 3768 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
48ef50fa 3769 secy->xpn = false;
ccfdec90
FW		 3770 break;
3771 case MACSEC_CIPHER_ID_GCM_AES_256:
3772 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
48ef50fa
EM		 3773 secy->xpn = false;
3774 break;
3775 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3776 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3777 secy->xpn = true;
3778 break;
3779 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3780 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3781 secy->xpn = true;
ccfdec90
FW		 3782 break;
3783 default:
3784 return -EINVAL;
3785 }
3786 }
3787
3788 return 0;
c09440f7
SD		 3789}
3790
3791static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
ad744b22
MS		 3792 struct nlattr *data[],
3793 struct netlink_ext_ack *extack)
c09440f7 3794{
3cf3227a 3795 struct macsec_dev *macsec = macsec_priv(dev);
022e9d60 3796 struct macsec_tx_sc tx_sc;
3cf3227a
AT		 3797 struct macsec_secy secy;
3798 int ret;
3799
c09440f7
SD		 3800 if (!data)
3801 return 0;
3802
3803 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3804 data[IFLA_MACSEC_ICV_LEN] ||
3805 data[IFLA_MACSEC_SCI] ||
3806 data[IFLA_MACSEC_PORT])
3807 return -EINVAL;
3808
3cf3227a
AT		 3809 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3810 * propagation fails, to revert macsec_changelink_common.
3811 */
3812 memcpy(&secy, &macsec->secy, sizeof(secy));
3813 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3814
3815 ret = macsec_changelink_common(dev, data);
3816 if (ret)
3817 return ret;
3818
3819 /* If h/w offloading is available, propagate to the device */
3820 if (macsec_is_offloaded(macsec)) {
3821 const struct macsec_ops *ops;
3822 struct macsec_context ctx;
3823 int ret;
3824
3825 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3826 if (!ops) {
3827 ret = -EOPNOTSUPP;
3828 goto cleanup;
3829 }
3830
3831 ctx.secy = &macsec->secy;
3832 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3833 if (ret)
3834 goto cleanup;
3835 }
3836
3837 return 0;
3838
3839cleanup:
3840 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3841 memcpy(&macsec->secy, &secy, sizeof(secy));
3842
3843 return ret;
c09440f7
SD		 3844}
3845
3846static void macsec_del_dev(struct macsec_dev *macsec)
3847{
3848 int i;
3849
3850 while (macsec->secy.rx_sc) {
3851 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3852
3853 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3854 free_rx_sc(rx_sc);
3855 }
3856
3857 for (i = 0; i < MACSEC_NUM_AN; i++) {
3858 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3859
3860 if (sa) {
3861 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3862 clear_tx_sa(sa);
3863 }
3864 }
3865}
3866
bbe11fab
SD		 3867static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3868{
3869 struct macsec_dev *macsec = macsec_priv(dev);
e2003872 3870 struct net_device *real_dev = macsec->real_dev;
bbe11fab
SD		 3871
3872 unregister_netdevice_queue(dev, head);
3873 list_del_rcu(&macsec->secys);
3874 macsec_del_dev(macsec);
e2003872 3875 netdev_upper_dev_unlink(real_dev, dev);
bbe11fab
SD		 3876
3877 macsec_generation++;
3878}
3879
c09440f7
SD		 3880static void macsec_dellink(struct net_device *dev, struct list_head *head)
3881{
3882 struct macsec_dev *macsec = macsec_priv(dev);
3883 struct net_device *real_dev = macsec->real_dev;
3884 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3885
3cf3227a
AT		 3886 /* If h/w offloading is available, propagate to the device */
3887 if (macsec_is_offloaded(macsec)) {
3888 const struct macsec_ops *ops;
3889 struct macsec_context ctx;
3890
3891 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3892 if (ops) {
3893 ctx.secy = &macsec->secy;
3894 macsec_offload(ops->mdo_del_secy, &ctx);
3895 }
3896 }
3897
bbe11fab 3898 macsec_common_dellink(dev, head);
96cfc505 3899
960d5848 3900 if (list_empty(&rxd->secys)) {
c09440f7 3901 netdev_rx_handler_unregister(real_dev);
960d5848
SD		 3902 kfree(rxd);
3903 }
c09440f7
SD		 3904}
3905
3906static int register_macsec_dev(struct net_device *real_dev,
3907 struct net_device *dev)
3908{
3909 struct macsec_dev *macsec = macsec_priv(dev);
3910 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3911
3912 if (!rxd) {
3913 int err;
3914
3915 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3916 if (!rxd)
3917 return -ENOMEM;
3918
3919 INIT_LIST_HEAD(&rxd->secys);
3920
3921 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3922 rxd);
960d5848
SD		 3923 if (err < 0) {
3924 kfree(rxd);
c09440f7 3925 return err;
960d5848 3926 }
c09440f7
SD		 3927 }
3928
3929 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3930 return 0;
3931}
3932
3933static bool sci_exists(struct net_device *dev, sci_t sci)
3934{
3935 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3936 struct macsec_dev *macsec;
3937
3938 list_for_each_entry(macsec, &rxd->secys, secys) {
3939 if (macsec->secy.sci == sci)
3940 return true;
3941 }
3942
3943 return false;
3944}
3945
c09440f7
SD		 3946static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3947{
3948 struct macsec_dev *macsec = macsec_priv(dev);
3949 struct macsec_secy *secy = &macsec->secy;
3950
3951 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3952 if (!macsec->stats)
3953 return -ENOMEM;
3954
3955 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3956 if (!secy->tx_sc.stats) {
3957 free_percpu(macsec->stats);
3958 return -ENOMEM;
3959 }
3960
3961 if (sci == MACSEC_UNDEF_SCI)
3962 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3963
3964 secy->netdev = dev;
3965 secy->operational = true;
3966 secy->key_len = DEFAULT_SAK_LEN;
3967 secy->icv_len = icv_len;
3968 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3969 secy->protect_frames = true;
3970 secy->replay_protect = false;
48ef50fa 3971 secy->xpn = DEFAULT_XPN;
c09440f7
SD		 3972
3973 secy->sci = sci;
3974 secy->tx_sc.active = true;
3975 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3976 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3977 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3978 secy->tx_sc.end_station = false;
3979 secy->tx_sc.scb = false;
3980
3981 return 0;
3982}
3983
845e0ebb
CW		 3984static struct lock_class_key macsec_netdev_addr_lock_key;
3985
c09440f7 3986static int macsec_newlink(struct net *net, struct net_device *dev,
7a3f4a18
MS		 3987 struct nlattr *tb[], struct nlattr *data[],
3988 struct netlink_ext_ack *extack)
c09440f7
SD		 3989{
3990 struct macsec_dev *macsec = macsec_priv(dev);
7f327080
TY		 3991 rx_handler_func_t *rx_handler;
3992 u8 icv_len = DEFAULT_ICV_LEN;
c09440f7 3993 struct net_device *real_dev;
7f327080 3994 int err, mtu;
c09440f7 3995 sci_t sci;
c09440f7
SD		 3996
3997 if (!tb[IFLA_LINK])
3998 return -EINVAL;
3999 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4000 if (!real_dev)
4001 return -ENODEV;
b06d072c
WB		 4002 if (real_dev->type != ARPHRD_ETHER)
4003 return -EINVAL;
c09440f7
SD		 4004
4005 dev->priv_flags |= IFF_MACSEC;
4006
4007 macsec->real_dev = real_dev;
4008
791bb3fc
MS		 4009 if (data && data[IFLA_MACSEC_OFFLOAD])
4010 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4011 else
4012 /* MACsec offloading is off by default */
4013 macsec->offload = MACSEC_OFFLOAD_OFF;
4014
4015 /* Check if the offloading mode is supported by the underlying layers */
4016 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4017 !macsec_check_offload(macsec->offload, macsec))
4018 return -EOPNOTSUPP;
3cf3227a 4019
c09440f7
SD		 4020 if (data && data[IFLA_MACSEC_ICV_LEN])
4021 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
7f327080
TY		 4022 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4023 if (mtu < 0)
4024 dev->mtu = 0;
4025 else
4026 dev->mtu = mtu;
c09440f7
SD		 4027
4028 rx_handler = rtnl_dereference(real_dev->rx_handler);
4029 if (rx_handler && rx_handler != macsec_handle_frame)
4030 return -EBUSY;
4031
4032 err = register_netdevice(dev);
4033 if (err < 0)
4034 return err;
4035
1a33e10e 4036 netdev_lockdep_set_classes(dev);
be74294f
CW		 4037 lockdep_set_class(&dev->addr_list_lock,
4038 &macsec_netdev_addr_lock_key);
1a33e10e 4039
42ab19ee 4040 err = netdev_upper_dev_link(real_dev, dev, extack);
e2003872 4041 if (err < 0)
bd28899d 4042 goto unregister;
e2003872 4043
c09440f7
SD		 4044 /* need to be already registered so that ->init has run and
4045 * the MAC addr is set
4046 */
4047 if (data && data[IFLA_MACSEC_SCI])
4048 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4049 else if (data && data[IFLA_MACSEC_PORT])
4050 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4051 else
4052 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4053
4054 if (rx_handler && sci_exists(real_dev, sci)) {
4055 err = -EBUSY;
e2003872 4056 goto unlink;
c09440f7
SD		 4057 }
4058
4059 err = macsec_add_dev(dev, sci, icv_len);
4060 if (err)
e2003872 4061 goto unlink;
c09440f7 4062
ccfdec90
FW		 4063 if (data) {
4064 err = macsec_changelink_common(dev, data);
4065 if (err)
4066 goto del_dev;
4067 }
c09440f7 4068
791bb3fc
MS		 4069 /* If h/w offloading is available, propagate to the device */
4070 if (macsec_is_offloaded(macsec)) {
4071 const struct macsec_ops *ops;
4072 struct macsec_context ctx;
4073
4074 ops = macsec_get_ops(macsec, &ctx);
4075 if (ops) {
4076 ctx.secy = &macsec->secy;
4077 err = macsec_offload(ops->mdo_add_secy, &ctx);
4078 if (err)
4079 goto del_dev;
4080 }
4081 }
4082
c09440f7
SD		 4083 err = register_macsec_dev(real_dev, dev);
4084 if (err < 0)
4085 goto del_dev;
4086
e6ac0758
SD		 4087 netif_stacked_transfer_operstate(real_dev, dev);
4088 linkwatch_fire_event(dev);
4089
96cfc505
SD		 4090 macsec_generation++;
4091
c09440f7
SD		 4092 return 0;
4093
4094del_dev:
4095 macsec_del_dev(macsec);
e2003872
SD		 4096unlink:
4097 netdev_upper_dev_unlink(real_dev, dev);
bd28899d 4098unregister:
c09440f7
SD		 4099 unregister_netdevice(dev);
4100 return err;
4101}
4102
a8b8a889
MS		 4103static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4104 struct netlink_ext_ack *extack)
c09440f7 4105{
74816480 4106 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
c09440f7
SD		 4107 u8 icv_len = DEFAULT_ICV_LEN;
4108 int flag;
4109 bool es, scb, sci;
4110
4111 if (!data)
4112 return 0;
4113
4114 if (data[IFLA_MACSEC_CIPHER_SUITE])
4115 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4116
f04c392d 4117 if (data[IFLA_MACSEC_ICV_LEN]) {
c09440f7 4118 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
f04c392d
DC		 4119 if (icv_len != DEFAULT_ICV_LEN) {
4120 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4121 struct crypto_aead *dummy_tfm;
4122
4123 dummy_tfm = macsec_alloc_tfm(dummy_key,
4124 DEFAULT_SAK_LEN,
4125 icv_len);
4126 if (IS_ERR(dummy_tfm))
4127 return PTR_ERR(dummy_tfm);
4128 crypto_free_aead(dummy_tfm);
4129 }
4130 }
c09440f7
SD		 4131
4132 switch (csid) {
ccfdec90
FW		 4133 case MACSEC_CIPHER_ID_GCM_AES_128:
4134 case MACSEC_CIPHER_ID_GCM_AES_256:
48ef50fa
EM		 4135 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4136 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
e8660ded 4137 case MACSEC_DEFAULT_CIPHER_ID:
c09440f7 4138 if (icv_len < MACSEC_MIN_ICV_LEN ||
2ccbe2cb 4139 icv_len > MACSEC_STD_ICV_LEN)
c09440f7
SD		 4140 return -EINVAL;
4141 break;
4142 default:
4143 return -EINVAL;
4144 }
4145
4146 if (data[IFLA_MACSEC_ENCODING_SA]) {
4147 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4148 return -EINVAL;
4149 }
4150
4151 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4152 flag < IFLA_MACSEC_VALIDATION;
4153 flag++) {
4154 if (data[flag]) {
4155 if (nla_get_u8(data[flag]) > 1)
4156 return -EINVAL;
4157 }
4158 }
4159
4160 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4161 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4162 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4163
4164 if ((sci && (scb || es)) || (scb && es))
4165 return -EINVAL;
4166
4167 if (data[IFLA_MACSEC_VALIDATION] &&
4168 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4169 return -EINVAL;
4170
4b1fb935
SD		 4171 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4172 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
c09440f7
SD		 4173 !data[IFLA_MACSEC_WINDOW])
4174 return -EINVAL;
4175
4176 return 0;
4177}
4178
4179static struct net *macsec_get_link_net(const struct net_device *dev)
4180{
4181 return dev_net(macsec_priv(dev)->real_dev);
4182}
4183
4184static size_t macsec_get_size(const struct net_device *dev)
4185{
c9fba3ed
ZS		 4186 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4187 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4188 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4189 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4190 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4191 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4192 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4193 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4194 nla_total_size(1) + /* IFLA_MACSEC_ES */
4195 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4196 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4197 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
c09440f7
SD		 4198 0;
4199}
4200
4201static int macsec_fill_info(struct sk_buff *skb,
4202 const struct net_device *dev)
4203{
4204 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4205 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ccfdec90
FW		 4206 u64 csid;
4207
4208 switch (secy->key_len) {
4209 case MACSEC_GCM_AES_128_SAK_LEN:
48ef50fa 4210 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 4211 break;
4212 case MACSEC_GCM_AES_256_SAK_LEN:
48ef50fa 4213 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
ccfdec90
FW		 4214 break;
4215 default:
4216 goto nla_put_failure;
4217 }
c09440f7 4218
f60d94c0
ND		 4219 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4220 IFLA_MACSEC_PAD) ||
c09440f7 4221 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
f60d94c0 4222 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
ccfdec90 4223 csid, IFLA_MACSEC_PAD) ||
c09440f7
SD		 4224 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4225 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4226 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4227 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4228 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4229 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4230 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4231 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4232 0)
4233 goto nla_put_failure;
4234
4235 if (secy->replay_protect) {
4236 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4237 goto nla_put_failure;
4238 }
4239
4240 return 0;
4241
4242nla_put_failure:
4243 return -EMSGSIZE;
4244}
4245
4246static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4247 .kind = "macsec",
4248 .priv_size = sizeof(struct macsec_dev),
4249 .maxtype = IFLA_MACSEC_MAX,
4250 .policy = macsec_rtnl_policy,
4251 .setup = macsec_setup,
4252 .validate = macsec_validate_attr,
4253 .newlink = macsec_newlink,
4254 .changelink = macsec_changelink,
4255 .dellink = macsec_dellink,
4256 .get_size = macsec_get_size,
4257 .fill_info = macsec_fill_info,
4258 .get_link_net = macsec_get_link_net,
4259};
4260
4261static bool is_macsec_master(struct net_device *dev)
4262{
4263 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4264}
4265
4266static int macsec_notify(struct notifier_block *this, unsigned long event,
4267 void *ptr)
4268{
4269 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4270 LIST_HEAD(head);
4271
4272 if (!is_macsec_master(real_dev))
4273 return NOTIFY_DONE;
4274
4275 switch (event) {
e6ac0758
SD		 4276 case NETDEV_DOWN:
4277 case NETDEV_UP:
4278 case NETDEV_CHANGE: {
4279 struct macsec_dev *m, *n;
4280 struct macsec_rxh_data *rxd;
4281
4282 rxd = macsec_data_rtnl(real_dev);
4283 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4284 struct net_device *dev = m->secy.netdev;
4285
4286 netif_stacked_transfer_operstate(real_dev, dev);
4287 }
4288 break;
4289 }
c09440f7
SD		 4290 case NETDEV_UNREGISTER: {
4291 struct macsec_dev *m, *n;
4292 struct macsec_rxh_data *rxd;
4293
4294 rxd = macsec_data_rtnl(real_dev);
4295 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
bbe11fab 4296 macsec_common_dellink(m->secy.netdev, &head);
c09440f7 4297 }
bbe11fab
SD		 4298
4299 netdev_rx_handler_unregister(real_dev);
4300 kfree(rxd);
4301
c09440f7
SD		 4302 unregister_netdevice_many(&head);
4303 break;
4304 }
4305 case NETDEV_CHANGEMTU: {
4306 struct macsec_dev *m;
4307 struct macsec_rxh_data *rxd;
4308
4309 rxd = macsec_data_rtnl(real_dev);
4310 list_for_each_entry(m, &rxd->secys, secys) {
4311 struct net_device *dev = m->secy.netdev;
4312 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4313 macsec_extra_len(true));
4314
4315 if (dev->mtu > mtu)
4316 dev_set_mtu(dev, mtu);
4317 }
4318 }
4319 }
4320
4321 return NOTIFY_OK;
4322}
4323
4324static struct notifier_block macsec_notifier = {
4325 .notifier_call = macsec_notify,
4326};
4327
4328static int __init macsec_init(void)
4329{
4330 int err;
4331
4332 pr_info("MACsec IEEE 802.1AE\n");
4333 err = register_netdevice_notifier(&macsec_notifier);
4334 if (err)
4335 return err;
4336
4337 err = rtnl_link_register(&macsec_link_ops);
4338 if (err)
4339 goto notifier;
4340
489111e5 4341 err = genl_register_family(&macsec_fam);
c09440f7
SD		 4342 if (err)
4343 goto rtnl;
4344
4345 return 0;
4346
4347rtnl:
4348 rtnl_link_unregister(&macsec_link_ops);
4349notifier:
4350 unregister_netdevice_notifier(&macsec_notifier);
4351 return err;
4352}
4353
4354static void __exit macsec_exit(void)
4355{
4356 genl_unregister_family(&macsec_fam);
4357 rtnl_link_unregister(&macsec_link_ops);
4358 unregister_netdevice_notifier(&macsec_notifier);
b196c22a 4359 rcu_barrier();
c09440f7
SD		 4360}
4361
4362module_init(macsec_init);
4363module_exit(macsec_exit);
4364
4365MODULE_ALIAS_RTNL_LINK("macsec");
78362998 4366MODULE_ALIAS_GENL_FAMILY("macsec");
c09440f7
SD		 4367
4368MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4369MODULE_LICENSE("GPL v2");
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