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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[mirror_ubuntu-hirsute-kernel.git] / drivers / net / macsec.c
CommitLineData
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;
1080 sci_t sci;
a21ecf0e 1081 u32 hdr_pn;
c09440f7
SD		 1082 bool cbit;
1083 struct pcpu_rx_sc_stats *rxsc_stats;
1084 struct pcpu_secy_stats *secy_stats;
1085 bool pulled_sci;
5491e7c6 1086 int ret;
c09440f7
SD		 1087
1088 if (skb_headroom(skb) < ETH_HLEN)
1089 goto drop_direct;
1090
1091 hdr = macsec_ethhdr(skb);
3cf3227a
AT		 1092 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1093 return handle_not_macsec(skb);
c09440f7
SD		 1094
1095 skb = skb_unshare(skb, GFP_ATOMIC);
095c02da
AS		 1096 *pskb = skb;
1097 if (!skb)
c09440f7 1098 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1099
1100 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1101 if (!pulled_sci) {
1102 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1103 goto drop_direct;
1104 }
1105
1106 hdr = macsec_ethhdr(skb);
1107
1108 /* Frames with a SecTAG that has the TCI E bit set but the C
1109 * bit clear are discarded, as this reserved encoding is used
1110 * to identify frames with a SecTAG that are not to be
1111 * delivered to the Controlled Port.
1112 */
1113 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1114 return RX_HANDLER_PASS;
1115
1116 /* now, pull the extra length */
1117 if (hdr->tci_an & MACSEC_TCI_SC) {
1118 if (!pulled_sci)
1119 goto drop_direct;
1120 }
1121
1122 /* ethernet header is part of crypto processing */
1123 skb_push(skb, ETH_HLEN);
1124
1125 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1126 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1127 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1128
1129 rcu_read_lock();
1130 rxd = macsec_data_rcu(skb->dev);
1131
1132 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1133 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
7979472b 1134
c78ebe1d 1135 sc = sc ? macsec_rxsc_get(sc) : NULL;
c09440f7
SD		 1136
1137 if (sc) {
1138 secy = &macsec->secy;
1139 rx_sc = sc;
1140 break;
1141 }
1142 }
1143
1144 if (!secy)
1145 goto nosci;
1146
1147 dev = secy->netdev;
1148 macsec = macsec_priv(dev);
1149 secy_stats = this_cpu_ptr(macsec->stats);
1150 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1151
a21ecf0e 1152 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
c09440f7
SD		 1153 u64_stats_update_begin(&secy_stats->syncp);
1154 secy_stats->stats.InPktsBadTag++;
1155 u64_stats_update_end(&secy_stats->syncp);
1156 goto drop_nosa;
1157 }
1158
1159 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1160 if (!rx_sa) {
1161 /* 10.6.1 if the SA is not in use */
1162
1163 /* If validateFrames is Strict or the C bit in the
1164 * SecTAG is set, discard
1165 */
1166 if (hdr->tci_an & MACSEC_TCI_C ||
1167 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1168 u64_stats_update_begin(&rxsc_stats->syncp);
1169 rxsc_stats->stats.InPktsNotUsingSA++;
1170 u64_stats_update_end(&rxsc_stats->syncp);
1171 goto drop_nosa;
1172 }
1173
1174 /* not Strict, the frame (with the SecTAG and ICV
1175 * removed) is delivered to the Controlled Port.
1176 */
1177 u64_stats_update_begin(&rxsc_stats->syncp);
1178 rxsc_stats->stats.InPktsUnusedSA++;
1179 u64_stats_update_end(&rxsc_stats->syncp);
1180 goto deliver;
1181 }
1182
1183 /* First, PN check to avoid decrypting obviously wrong packets */
a21ecf0e 1184 hdr_pn = ntohl(hdr->packet_number);
c09440f7
SD		 1185 if (secy->replay_protect) {
1186 bool late;
1187
1188 spin_lock(&rx_sa->lock);
a21ecf0e
EM		 1189 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1190 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1191
1192 if (secy->xpn)
1193 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
c09440f7
SD		 1194 spin_unlock(&rx_sa->lock);
1195
1196 if (late) {
1197 u64_stats_update_begin(&rxsc_stats->syncp);
1198 rxsc_stats->stats.InPktsLate++;
1199 u64_stats_update_end(&rxsc_stats->syncp);
1200 goto drop;
1201 }
1202 }
1203
e3a3b626
BG		 1204 macsec_skb_cb(skb)->rx_sa = rx_sa;
1205
c09440f7
SD		 1206 /* Disabled && !changed text => skip validation */
1207 if (hdr->tci_an & MACSEC_TCI_C ||
1208 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1209 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1210
c3b7d0bd
SD		 1211 if (IS_ERR(skb)) {
1212 /* the decrypt callback needs the reference */
c78ebe1d 1213 if (PTR_ERR(skb) != -EINPROGRESS) {
c3b7d0bd 1214 macsec_rxsa_put(rx_sa);
c78ebe1d
SD		 1215 macsec_rxsc_put(rx_sc);
1216 }
c09440f7
SD		 1217 rcu_read_unlock();
1218 *pskb = NULL;
1219 return RX_HANDLER_CONSUMED;
1220 }
1221
a21ecf0e 1222 if (!macsec_post_decrypt(skb, secy, hdr_pn))
c09440f7
SD		 1223 goto drop;
1224
1225deliver:
1226 macsec_finalize_skb(skb, secy->icv_len,
1227 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1228 macsec_reset_skb(skb, secy->netdev);
1229
497f358a
SD		 1230 if (rx_sa)
1231 macsec_rxsa_put(rx_sa);
c78ebe1d 1232 macsec_rxsc_put(rx_sc);
5491e7c6 1233
ba56d8ce 1234 skb_orphan(skb);
5491e7c6
PA		 1235 ret = gro_cells_receive(&macsec->gro_cells, skb);
1236 if (ret == NET_RX_SUCCESS)
1237 count_rx(dev, skb->len);
1238 else
1239 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1240
1241 rcu_read_unlock();
1242
5491e7c6
PA		 1243 *pskb = NULL;
1244 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1245
1246drop:
1247 macsec_rxsa_put(rx_sa);
1248drop_nosa:
c78ebe1d 1249 macsec_rxsc_put(rx_sc);
c09440f7
SD		 1250 rcu_read_unlock();
1251drop_direct:
1252 kfree_skb(skb);
1253 *pskb = NULL;
1254 return RX_HANDLER_CONSUMED;
1255
1256nosci:
1257 /* 10.6.1 if the SC is not found */
1258 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1259 if (!cbit)
1260 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1261 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1262
1263 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1264 struct sk_buff *nskb;
c09440f7
SD		 1265
1266 secy_stats = this_cpu_ptr(macsec->stats);
1267
1268 /* If validateFrames is Strict or the C bit in the
1269 * SecTAG is set, discard
1270 */
1271 if (cbit ||
1272 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1273 u64_stats_update_begin(&secy_stats->syncp);
1274 secy_stats->stats.InPktsNoSCI++;
1275 u64_stats_update_end(&secy_stats->syncp);
1276 continue;
1277 }
1278
1279 /* not strict, the frame (with the SecTAG and ICV
1280 * removed) is delivered to the Controlled Port.
1281 */
1282 nskb = skb_clone(skb, GFP_ATOMIC);
1283 if (!nskb)
1284 break;
1285
1286 macsec_reset_skb(nskb, macsec->secy.netdev);
1287
1288 ret = netif_rx(nskb);
1289 if (ret == NET_RX_SUCCESS) {
1290 u64_stats_update_begin(&secy_stats->syncp);
1291 secy_stats->stats.InPktsUnknownSCI++;
1292 u64_stats_update_end(&secy_stats->syncp);
1293 } else {
1294 macsec->secy.netdev->stats.rx_dropped++;
1295 }
1296 }
1297
1298 rcu_read_unlock();
1299 *pskb = skb;
1300 return RX_HANDLER_PASS;
1301}
1302
1303static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1304{
1305 struct crypto_aead *tfm;
1306 int ret;
1307
6052f7fb 1308 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
34aedfee
DC		 1309
1310 if (IS_ERR(tfm))
1311 return tfm;
c09440f7
SD		 1312
1313 ret = crypto_aead_setkey(tfm, key, key_len);
34aedfee
DC		 1314 if (ret < 0)
1315 goto fail;
c09440f7
SD		 1316
1317 ret = crypto_aead_setauthsize(tfm, icv_len);
34aedfee
DC		 1318 if (ret < 0)
1319 goto fail;
c09440f7
SD		 1320
1321 return tfm;
34aedfee
DC		 1322fail:
1323 crypto_free_aead(tfm);
1324 return ERR_PTR(ret);
c09440f7
SD		 1325}
1326
1327static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1328 int icv_len)
1329{
1330 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1331 if (!rx_sa->stats)
34aedfee 1332 return -ENOMEM;
c09440f7
SD		 1333
1334 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1335 if (IS_ERR(rx_sa->key.tfm)) {
c09440f7 1336 free_percpu(rx_sa->stats);
34aedfee 1337 return PTR_ERR(rx_sa->key.tfm);
c09440f7
SD		 1338 }
1339
48ef50fa 1340 rx_sa->ssci = MACSEC_UNDEF_SSCI;
c09440f7
SD		 1341 rx_sa->active = false;
1342 rx_sa->next_pn = 1;
e187246f 1343 refcount_set(&rx_sa->refcnt, 1);
c09440f7
SD		 1344 spin_lock_init(&rx_sa->lock);
1345
1346 return 0;
1347}
1348
1349static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1350{
1351 rx_sa->active = false;
1352
1353 macsec_rxsa_put(rx_sa);
1354}
1355
1356static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1357{
1358 int i;
1359
1360 for (i = 0; i < MACSEC_NUM_AN; i++) {
1361 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1362
1363 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1364 if (sa)
1365 clear_rx_sa(sa);
1366 }
1367
1368 macsec_rxsc_put(rx_sc);
1369}
1370
1371static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1372{
1373 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1374
1375 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1376 rx_sc;
1377 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1378 if (rx_sc->sci == sci) {
1379 if (rx_sc->active)
1380 secy->n_rx_sc--;
1381 rcu_assign_pointer(*rx_scp, rx_sc->next);
1382 return rx_sc;
1383 }
1384 }
1385
1386 return NULL;
1387}
1388
1389static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1390{
1391 struct macsec_rx_sc *rx_sc;
1392 struct macsec_dev *macsec;
1393 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1394 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1395 struct macsec_secy *secy;
1396
1397 list_for_each_entry(macsec, &rxd->secys, secys) {
1398 if (find_rx_sc_rtnl(&macsec->secy, sci))
1399 return ERR_PTR(-EEXIST);
1400 }
1401
1402 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1403 if (!rx_sc)
1404 return ERR_PTR(-ENOMEM);
1405
1406 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1407 if (!rx_sc->stats) {
1408 kfree(rx_sc);
1409 return ERR_PTR(-ENOMEM);
1410 }
1411
1412 rx_sc->sci = sci;
1413 rx_sc->active = true;
8676d76f 1414 refcount_set(&rx_sc->refcnt, 1);
c09440f7
SD		 1415
1416 secy = &macsec_priv(dev)->secy;
1417 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1418 rcu_assign_pointer(secy->rx_sc, rx_sc);
1419
1420 if (rx_sc->active)
1421 secy->n_rx_sc++;
1422
1423 return rx_sc;
1424}
1425
1426static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1427 int icv_len)
1428{
1429 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1430 if (!tx_sa->stats)
34aedfee 1431 return -ENOMEM;
c09440f7
SD		 1432
1433 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1434 if (IS_ERR(tx_sa->key.tfm)) {
c09440f7 1435 free_percpu(tx_sa->stats);
34aedfee 1436 return PTR_ERR(tx_sa->key.tfm);
c09440f7
SD		 1437 }
1438
48ef50fa 1439 tx_sa->ssci = MACSEC_UNDEF_SSCI;
c09440f7 1440 tx_sa->active = false;
28206cdb 1441 refcount_set(&tx_sa->refcnt, 1);
c09440f7
SD		 1442 spin_lock_init(&tx_sa->lock);
1443
1444 return 0;
1445}
1446
1447static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1448{
1449 tx_sa->active = false;
1450
1451 macsec_txsa_put(tx_sa);
1452}
1453
489111e5 1454static struct genl_family macsec_fam;
c09440f7
SD		 1455
1456static struct net_device *get_dev_from_nl(struct net *net,
1457 struct nlattr **attrs)
1458{
1459 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1460 struct net_device *dev;
1461
1462 dev = __dev_get_by_index(net, ifindex);
1463 if (!dev)
1464 return ERR_PTR(-ENODEV);
1465
1466 if (!netif_is_macsec(dev))
1467 return ERR_PTR(-ENODEV);
1468
1469 return dev;
1470}
1471
1472static sci_t nla_get_sci(const struct nlattr *nla)
1473{
1474 return (__force sci_t)nla_get_u64(nla);
1475}
1476
f60d94c0
ND		 1477static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1478 int padattr)
c09440f7 1479{
f60d94c0 1480 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
c09440f7
SD		 1481}
1482
48ef50fa
EM		 1483static ssci_t nla_get_ssci(const struct nlattr *nla)
1484{
1485 return (__force ssci_t)nla_get_u32(nla);
1486}
1487
1488static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1489{
1490 return nla_put_u32(skb, attrtype, (__force u64)value);
1491}
1492
c09440f7
SD		 1493static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1494 struct nlattr **attrs,
1495 struct nlattr **tb_sa,
1496 struct net_device **devp,
1497 struct macsec_secy **secyp,
1498 struct macsec_tx_sc **scp,
1499 u8 *assoc_num)
1500{
1501 struct net_device *dev;
1502 struct macsec_secy *secy;
1503 struct macsec_tx_sc *tx_sc;
1504 struct macsec_tx_sa *tx_sa;
1505
1506 if (!tb_sa[MACSEC_SA_ATTR_AN])
1507 return ERR_PTR(-EINVAL);
1508
1509 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1510
1511 dev = get_dev_from_nl(net, attrs);
1512 if (IS_ERR(dev))
1513 return ERR_CAST(dev);
1514
1515 if (*assoc_num >= MACSEC_NUM_AN)
1516 return ERR_PTR(-EINVAL);
1517
1518 secy = &macsec_priv(dev)->secy;
1519 tx_sc = &secy->tx_sc;
1520
1521 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1522 if (!tx_sa)
1523 return ERR_PTR(-ENODEV);
1524
1525 *devp = dev;
1526 *scp = tx_sc;
1527 *secyp = secy;
1528 return tx_sa;
1529}
1530
1531static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1532 struct nlattr **attrs,
1533 struct nlattr **tb_rxsc,
1534 struct net_device **devp,
1535 struct macsec_secy **secyp)
1536{
1537 struct net_device *dev;
1538 struct macsec_secy *secy;
1539 struct macsec_rx_sc *rx_sc;
1540 sci_t sci;
1541
1542 dev = get_dev_from_nl(net, attrs);
1543 if (IS_ERR(dev))
1544 return ERR_CAST(dev);
1545
1546 secy = &macsec_priv(dev)->secy;
1547
1548 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1549 return ERR_PTR(-EINVAL);
1550
1551 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1552 rx_sc = find_rx_sc_rtnl(secy, sci);
1553 if (!rx_sc)
1554 return ERR_PTR(-ENODEV);
1555
1556 *secyp = secy;
1557 *devp = dev;
1558
1559 return rx_sc;
1560}
1561
1562static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1563 struct nlattr **attrs,
1564 struct nlattr **tb_rxsc,
1565 struct nlattr **tb_sa,
1566 struct net_device **devp,
1567 struct macsec_secy **secyp,
1568 struct macsec_rx_sc **scp,
1569 u8 *assoc_num)
1570{
1571 struct macsec_rx_sc *rx_sc;
1572 struct macsec_rx_sa *rx_sa;
1573
1574 if (!tb_sa[MACSEC_SA_ATTR_AN])
1575 return ERR_PTR(-EINVAL);
1576
1577 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1578 if (*assoc_num >= MACSEC_NUM_AN)
1579 return ERR_PTR(-EINVAL);
1580
1581 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1582 if (IS_ERR(rx_sc))
1583 return ERR_CAST(rx_sc);
1584
1585 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1586 if (!rx_sa)
1587 return ERR_PTR(-ENODEV);
1588
1589 *scp = rx_sc;
1590 return rx_sa;
1591}
1592
c09440f7
SD		 1593static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1594 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1595 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1596 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
dcb780fb 1597 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
c09440f7
SD		 1598};
1599
1600static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1601 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1602 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1603};
1604
1605static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1606 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1607 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
48ef50fa 1608 [MACSEC_SA_ATTR_PN] = { .type = NLA_MIN_LEN, .len = 4 },
8acca6ac
SD		 1609 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1610 .len = MACSEC_KEYID_LEN, },
c09440f7 1611 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
e8660ded 1612 .len = MACSEC_MAX_KEY_LEN, },
48ef50fa
EM		 1613 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1614 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1615 .len = MACSEC_SALT_LEN, },
c09440f7
SD		 1616};
1617
dcb780fb
AT		 1618static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1619 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1620};
1621
3cf3227a
AT		 1622/* Offloads an operation to a device driver */
1623static int macsec_offload(int (* const func)(struct macsec_context *),
1624 struct macsec_context *ctx)
1625{
1626 int ret;
1627
1628 if (unlikely(!func))
1629 return 0;
1630
1631 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1632 mutex_lock(&ctx->phydev->lock);
1633
1634 /* Phase I: prepare. The drive should fail here if there are going to be
1635 * issues in the commit phase.
1636 */
1637 ctx->prepare = true;
1638 ret = (*func)(ctx);
1639 if (ret)
1640 goto phy_unlock;
1641
1642 /* Phase II: commit. This step cannot fail. */
1643 ctx->prepare = false;
1644 ret = (*func)(ctx);
1645 /* This should never happen: commit is not allowed to fail */
1646 if (unlikely(ret))
1647 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1648
1649phy_unlock:
1650 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1651 mutex_unlock(&ctx->phydev->lock);
1652
1653 return ret;
1654}
1655
c09440f7
SD		 1656static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1657{
1658 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1659 return -EINVAL;
1660
8cb08174 1661 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
c09440f7
SD		 1662 return -EINVAL;
1663
1664 return 0;
1665}
1666
1667static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1668{
1669 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1670 return -EINVAL;
1671
8cb08174 1672 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
c09440f7
SD		 1673 return -EINVAL;
1674
1675 return 0;
1676}
1677
1678static bool validate_add_rxsa(struct nlattr **attrs)
1679{
1680 if (!attrs[MACSEC_SA_ATTR_AN] ||
1681 !attrs[MACSEC_SA_ATTR_KEY] ||
1682 !attrs[MACSEC_SA_ATTR_KEYID])
1683 return false;
1684
1685 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1686 return false;
1687
48ef50fa
EM		 1688 if (attrs[MACSEC_SA_ATTR_PN] &&
1689 *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0)
c09440f7
SD		 1690 return false;
1691
1692 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1693 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1694 return false;
1695 }
1696
8acca6ac
SD		 1697 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1698 return false;
1699
c09440f7
SD		 1700 return true;
1701}
1702
1703static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1704{
1705 struct net_device *dev;
1706 struct nlattr **attrs = info->attrs;
1707 struct macsec_secy *secy;
1708 struct macsec_rx_sc *rx_sc;
1709 struct macsec_rx_sa *rx_sa;
1710 unsigned char assoc_num;
48ef50fa 1711 int pn_len;
c09440f7
SD		 1712 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1713 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1714 int err;
c09440f7
SD		 1715
1716 if (!attrs[MACSEC_ATTR_IFINDEX])
1717 return -EINVAL;
1718
1719 if (parse_sa_config(attrs, tb_sa))
1720 return -EINVAL;
1721
1722 if (parse_rxsc_config(attrs, tb_rxsc))
1723 return -EINVAL;
1724
1725 if (!validate_add_rxsa(tb_sa))
1726 return -EINVAL;
1727
1728 rtnl_lock();
1729 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
36b232c8 1730 if (IS_ERR(rx_sc)) {
c09440f7
SD		 1731 rtnl_unlock();
1732 return PTR_ERR(rx_sc);
1733 }
1734
1735 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1736
1737 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1738 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1739 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1740 rtnl_unlock();
1741 return -EINVAL;
1742 }
1743
48ef50fa
EM		 1744 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1745 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1746 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1747 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1748 rtnl_unlock();
1749 return -EINVAL;
1750 }
1751
1752 if (secy->xpn) {
1753 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1754 rtnl_unlock();
1755 return -EINVAL;
1756 }
1757
1758 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1759 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1760 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1761 MACSEC_SA_ATTR_SALT);
1762 rtnl_unlock();
1763 return -EINVAL;
1764 }
1765 }
1766
c09440f7
SD		 1767 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1768 if (rx_sa) {
1769 rtnl_unlock();
1770 return -EBUSY;
1771 }
1772
1773 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
34aedfee 1774 if (!rx_sa) {
c09440f7
SD		 1775 rtnl_unlock();
1776 return -ENOMEM;
1777 }
1778
34aedfee
DC		 1779 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1780 secy->key_len, secy->icv_len);
1781 if (err < 0) {
1782 kfree(rx_sa);
1783 rtnl_unlock();
1784 return err;
1785 }
1786
c09440f7
SD		 1787 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1788 spin_lock_bh(&rx_sa->lock);
48ef50fa 1789 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 1790 spin_unlock_bh(&rx_sa->lock);
1791 }
1792
1793 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1794 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1795
c09440f7 1796 rx_sa->sc = rx_sc;
3cf3227a
AT		 1797
1798 /* If h/w offloading is available, propagate to the device */
1799 if (macsec_is_offloaded(netdev_priv(dev))) {
1800 const struct macsec_ops *ops;
1801 struct macsec_context ctx;
1802
1803 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1804 if (!ops) {
1805 err = -EOPNOTSUPP;
1806 goto cleanup;
1807 }
1808
1809 ctx.sa.assoc_num = assoc_num;
1810 ctx.sa.rx_sa = rx_sa;
182879f8 1811 ctx.secy = secy;
3cf3227a
AT		 1812 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1813 MACSEC_KEYID_LEN);
1814
1815 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1816 if (err)
1817 goto cleanup;
1818 }
1819
48ef50fa
EM		 1820 if (secy->xpn) {
1821 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1822 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1823 MACSEC_SALT_LEN);
1824 }
1825
3cf3227a 1826 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1827 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1828
1829 rtnl_unlock();
1830
1831 return 0;
3cf3227a
AT		 1832
1833cleanup:
1834 kfree(rx_sa);
1835 rtnl_unlock();
1836 return err;
c09440f7
SD		 1837}
1838
1839static bool validate_add_rxsc(struct nlattr **attrs)
1840{
1841 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1842 return false;
1843
1844 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1845 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1846 return false;
1847 }
1848
1849 return true;
1850}
1851
1852static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1853{
1854 struct net_device *dev;
1855 sci_t sci = MACSEC_UNDEF_SCI;
1856 struct nlattr **attrs = info->attrs;
1857 struct macsec_rx_sc *rx_sc;
1858 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
182879f8 1859 struct macsec_secy *secy;
3cf3227a
AT		 1860 bool was_active;
1861 int ret;
c09440f7
SD		 1862
1863 if (!attrs[MACSEC_ATTR_IFINDEX])
1864 return -EINVAL;
1865
1866 if (parse_rxsc_config(attrs, tb_rxsc))
1867 return -EINVAL;
1868
1869 if (!validate_add_rxsc(tb_rxsc))
1870 return -EINVAL;
1871
1872 rtnl_lock();
1873 dev = get_dev_from_nl(genl_info_net(info), attrs);
1874 if (IS_ERR(dev)) {
1875 rtnl_unlock();
1876 return PTR_ERR(dev);
1877 }
1878
182879f8 1879 secy = &macsec_priv(dev)->secy;
c09440f7
SD		 1880 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1881
1882 rx_sc = create_rx_sc(dev, sci);
1883 if (IS_ERR(rx_sc)) {
1884 rtnl_unlock();
1885 return PTR_ERR(rx_sc);
1886 }
1887
3cf3227a 1888 was_active = rx_sc->active;
c09440f7
SD		 1889 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1890 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1891
3cf3227a
AT		 1892 if (macsec_is_offloaded(netdev_priv(dev))) {
1893 const struct macsec_ops *ops;
1894 struct macsec_context ctx;
1895
1896 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1897 if (!ops) {
1898 ret = -EOPNOTSUPP;
1899 goto cleanup;
1900 }
1901
1902 ctx.rx_sc = rx_sc;
182879f8 1903 ctx.secy = secy;
3cf3227a
AT		 1904
1905 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1906 if (ret)
1907 goto cleanup;
1908 }
1909
c09440f7
SD		 1910 rtnl_unlock();
1911
1912 return 0;
3cf3227a
AT		 1913
1914cleanup:
1915 rx_sc->active = was_active;
1916 rtnl_unlock();
1917 return ret;
c09440f7
SD		 1918}
1919
1920static bool validate_add_txsa(struct nlattr **attrs)
1921{
1922 if (!attrs[MACSEC_SA_ATTR_AN] ||
1923 !attrs[MACSEC_SA_ATTR_PN] ||
1924 !attrs[MACSEC_SA_ATTR_KEY] ||
1925 !attrs[MACSEC_SA_ATTR_KEYID])
1926 return false;
1927
1928 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1929 return false;
1930
1931 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1932 return false;
1933
1934 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1935 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1936 return false;
1937 }
1938
8acca6ac
SD		 1939 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1940 return false;
1941
c09440f7
SD		 1942 return true;
1943}
1944
1945static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1946{
1947 struct net_device *dev;
1948 struct nlattr **attrs = info->attrs;
1949 struct macsec_secy *secy;
1950 struct macsec_tx_sc *tx_sc;
1951 struct macsec_tx_sa *tx_sa;
1952 unsigned char assoc_num;
48ef50fa 1953 int pn_len;
c09440f7 1954 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 1955 bool was_operational;
34aedfee 1956 int err;
c09440f7
SD		 1957
1958 if (!attrs[MACSEC_ATTR_IFINDEX])
1959 return -EINVAL;
1960
1961 if (parse_sa_config(attrs, tb_sa))
1962 return -EINVAL;
1963
1964 if (!validate_add_txsa(tb_sa))
1965 return -EINVAL;
1966
1967 rtnl_lock();
1968 dev = get_dev_from_nl(genl_info_net(info), attrs);
1969 if (IS_ERR(dev)) {
1970 rtnl_unlock();
1971 return PTR_ERR(dev);
1972 }
1973
1974 secy = &macsec_priv(dev)->secy;
1975 tx_sc = &secy->tx_sc;
1976
1977 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1978
1979 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1980 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1981 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1982 rtnl_unlock();
1983 return -EINVAL;
1984 }
1985
48ef50fa
EM		 1986 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1987 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1988 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
1989 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1990 rtnl_unlock();
1991 return -EINVAL;
1992 }
1993
1994 if (secy->xpn) {
1995 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1996 rtnl_unlock();
1997 return -EINVAL;
1998 }
1999
2000 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2001 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2002 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2003 MACSEC_SA_ATTR_SALT);
2004 rtnl_unlock();
2005 return -EINVAL;
2006 }
2007 }
2008
c09440f7
SD		 2009 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2010 if (tx_sa) {
2011 rtnl_unlock();
2012 return -EBUSY;
2013 }
2014
2015 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
34aedfee 2016 if (!tx_sa) {
c09440f7
SD		 2017 rtnl_unlock();
2018 return -ENOMEM;
2019 }
2020
34aedfee
DC		 2021 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2022 secy->key_len, secy->icv_len);
2023 if (err < 0) {
2024 kfree(tx_sa);
2025 rtnl_unlock();
2026 return err;
2027 }
2028
c09440f7 2029 spin_lock_bh(&tx_sa->lock);
48ef50fa 2030 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2031 spin_unlock_bh(&tx_sa->lock);
2032
2033 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2034 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2035
3cf3227a 2036 was_operational = secy->operational;
c09440f7
SD		 2037 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2038 secy->operational = true;
2039
3cf3227a
AT		 2040 /* If h/w offloading is available, propagate to the device */
2041 if (macsec_is_offloaded(netdev_priv(dev))) {
2042 const struct macsec_ops *ops;
2043 struct macsec_context ctx;
2044
2045 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2046 if (!ops) {
2047 err = -EOPNOTSUPP;
2048 goto cleanup;
2049 }
2050
2051 ctx.sa.assoc_num = assoc_num;
2052 ctx.sa.tx_sa = tx_sa;
182879f8 2053 ctx.secy = secy;
3cf3227a
AT		 2054 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2055 MACSEC_KEYID_LEN);
2056
2057 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2058 if (err)
2059 goto cleanup;
2060 }
2061
48ef50fa
EM		 2062 if (secy->xpn) {
2063 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2064 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2065 MACSEC_SALT_LEN);
2066 }
2067
3cf3227a 2068 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 2069 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2070
2071 rtnl_unlock();
2072
2073 return 0;
3cf3227a
AT		 2074
2075cleanup:
2076 secy->operational = was_operational;
2077 kfree(tx_sa);
2078 rtnl_unlock();
2079 return err;
c09440f7
SD		 2080}
2081
2082static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2083{
2084 struct nlattr **attrs = info->attrs;
2085 struct net_device *dev;
2086 struct macsec_secy *secy;
2087 struct macsec_rx_sc *rx_sc;
2088 struct macsec_rx_sa *rx_sa;
2089 u8 assoc_num;
2090 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2091 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2092 int ret;
c09440f7
SD		 2093
2094 if (!attrs[MACSEC_ATTR_IFINDEX])
2095 return -EINVAL;
2096
2097 if (parse_sa_config(attrs, tb_sa))
2098 return -EINVAL;
2099
2100 if (parse_rxsc_config(attrs, tb_rxsc))
2101 return -EINVAL;
2102
2103 rtnl_lock();
2104 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2105 &dev, &secy, &rx_sc, &assoc_num);
2106 if (IS_ERR(rx_sa)) {
2107 rtnl_unlock();
2108 return PTR_ERR(rx_sa);
2109 }
2110
2111 if (rx_sa->active) {
2112 rtnl_unlock();
2113 return -EBUSY;
2114 }
2115
3cf3227a
AT		 2116 /* If h/w offloading is available, propagate to the device */
2117 if (macsec_is_offloaded(netdev_priv(dev))) {
2118 const struct macsec_ops *ops;
2119 struct macsec_context ctx;
2120
2121 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2122 if (!ops) {
2123 ret = -EOPNOTSUPP;
2124 goto cleanup;
2125 }
2126
2127 ctx.sa.assoc_num = assoc_num;
2128 ctx.sa.rx_sa = rx_sa;
182879f8 2129 ctx.secy = secy;
3cf3227a
AT		 2130
2131 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2132 if (ret)
2133 goto cleanup;
2134 }
2135
c09440f7
SD		 2136 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2137 clear_rx_sa(rx_sa);
2138
2139 rtnl_unlock();
2140
2141 return 0;
3cf3227a
AT		 2142
2143cleanup:
2144 rtnl_unlock();
2145 return ret;
c09440f7
SD		 2146}
2147
2148static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2149{
2150 struct nlattr **attrs = info->attrs;
2151 struct net_device *dev;
2152 struct macsec_secy *secy;
2153 struct macsec_rx_sc *rx_sc;
2154 sci_t sci;
2155 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a 2156 int ret;
c09440f7
SD		 2157
2158 if (!attrs[MACSEC_ATTR_IFINDEX])
2159 return -EINVAL;
2160
2161 if (parse_rxsc_config(attrs, tb_rxsc))
2162 return -EINVAL;
2163
2164 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2165 return -EINVAL;
2166
2167 rtnl_lock();
2168 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2169 if (IS_ERR(dev)) {
2170 rtnl_unlock();
2171 return PTR_ERR(dev);
2172 }
2173
2174 secy = &macsec_priv(dev)->secy;
2175 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2176
2177 rx_sc = del_rx_sc(secy, sci);
2178 if (!rx_sc) {
2179 rtnl_unlock();
2180 return -ENODEV;
2181 }
2182
3cf3227a
AT		 2183 /* If h/w offloading is available, propagate to the device */
2184 if (macsec_is_offloaded(netdev_priv(dev))) {
2185 const struct macsec_ops *ops;
2186 struct macsec_context ctx;
2187
2188 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2189 if (!ops) {
2190 ret = -EOPNOTSUPP;
2191 goto cleanup;
2192 }
2193
2194 ctx.rx_sc = rx_sc;
182879f8 2195 ctx.secy = secy;
3cf3227a
AT		 2196 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2197 if (ret)
2198 goto cleanup;
2199 }
2200
c09440f7
SD		 2201 free_rx_sc(rx_sc);
2202 rtnl_unlock();
2203
2204 return 0;
3cf3227a
AT		 2205
2206cleanup:
2207 rtnl_unlock();
2208 return ret;
c09440f7
SD		 2209}
2210
2211static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2212{
2213 struct nlattr **attrs = info->attrs;
2214 struct net_device *dev;
2215 struct macsec_secy *secy;
2216 struct macsec_tx_sc *tx_sc;
2217 struct macsec_tx_sa *tx_sa;
2218 u8 assoc_num;
2219 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2220 int ret;
c09440f7
SD		 2221
2222 if (!attrs[MACSEC_ATTR_IFINDEX])
2223 return -EINVAL;
2224
2225 if (parse_sa_config(attrs, tb_sa))
2226 return -EINVAL;
2227
2228 rtnl_lock();
2229 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2230 &dev, &secy, &tx_sc, &assoc_num);
2231 if (IS_ERR(tx_sa)) {
2232 rtnl_unlock();
2233 return PTR_ERR(tx_sa);
2234 }
2235
2236 if (tx_sa->active) {
2237 rtnl_unlock();
2238 return -EBUSY;
2239 }
2240
3cf3227a
AT		 2241 /* If h/w offloading is available, propagate to the device */
2242 if (macsec_is_offloaded(netdev_priv(dev))) {
2243 const struct macsec_ops *ops;
2244 struct macsec_context ctx;
2245
2246 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2247 if (!ops) {
2248 ret = -EOPNOTSUPP;
2249 goto cleanup;
2250 }
2251
2252 ctx.sa.assoc_num = assoc_num;
2253 ctx.sa.tx_sa = tx_sa;
182879f8 2254 ctx.secy = secy;
3cf3227a
AT		 2255
2256 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2257 if (ret)
2258 goto cleanup;
2259 }
2260
c09440f7
SD		 2261 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2262 clear_tx_sa(tx_sa);
2263
2264 rtnl_unlock();
2265
2266 return 0;
3cf3227a
AT		 2267
2268cleanup:
2269 rtnl_unlock();
2270 return ret;
c09440f7
SD		 2271}
2272
2273static bool validate_upd_sa(struct nlattr **attrs)
2274{
2275 if (!attrs[MACSEC_SA_ATTR_AN] ||
2276 attrs[MACSEC_SA_ATTR_KEY] ||
48ef50fa
EM		 2277 attrs[MACSEC_SA_ATTR_KEYID] ||
2278 attrs[MACSEC_SA_ATTR_SSCI] ||
2279 attrs[MACSEC_SA_ATTR_SALT])
c09440f7
SD		 2280 return false;
2281
2282 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2283 return false;
2284
2285 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2286 return false;
2287
2288 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2289 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2290 return false;
2291 }
2292
2293 return true;
2294}
2295
2296static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2297{
2298 struct nlattr **attrs = info->attrs;
2299 struct net_device *dev;
2300 struct macsec_secy *secy;
2301 struct macsec_tx_sc *tx_sc;
2302 struct macsec_tx_sa *tx_sa;
2303 u8 assoc_num;
2304 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2305 bool was_operational, was_active;
a21ecf0e 2306 pn_t prev_pn;
3cf3227a 2307 int ret = 0;
c09440f7 2308
a21ecf0e
EM		 2309 prev_pn.full64 = 0;
2310
c09440f7
SD		 2311 if (!attrs[MACSEC_ATTR_IFINDEX])
2312 return -EINVAL;
2313
2314 if (parse_sa_config(attrs, tb_sa))
2315 return -EINVAL;
2316
2317 if (!validate_upd_sa(tb_sa))
2318 return -EINVAL;
2319
2320 rtnl_lock();
2321 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2322 &dev, &secy, &tx_sc, &assoc_num);
2323 if (IS_ERR(tx_sa)) {
2324 rtnl_unlock();
2325 return PTR_ERR(tx_sa);
2326 }
2327
2328 if (tb_sa[MACSEC_SA_ATTR_PN]) {
48ef50fa
EM		 2329 int pn_len;
2330
2331 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2332 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2333 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2334 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2335 rtnl_unlock();
2336 return -EINVAL;
2337 }
2338
c09440f7 2339 spin_lock_bh(&tx_sa->lock);
a21ecf0e 2340 prev_pn = tx_sa->next_pn_halves;
48ef50fa 2341 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2342 spin_unlock_bh(&tx_sa->lock);
2343 }
2344
3cf3227a 2345 was_active = tx_sa->active;
c09440f7
SD		 2346 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2347 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2348
3cf3227a 2349 was_operational = secy->operational;
c09440f7
SD		 2350 if (assoc_num == tx_sc->encoding_sa)
2351 secy->operational = tx_sa->active;
2352
3cf3227a
AT		 2353 /* If h/w offloading is available, propagate to the device */
2354 if (macsec_is_offloaded(netdev_priv(dev))) {
2355 const struct macsec_ops *ops;
2356 struct macsec_context ctx;
2357
2358 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2359 if (!ops) {
2360 ret = -EOPNOTSUPP;
2361 goto cleanup;
2362 }
2363
2364 ctx.sa.assoc_num = assoc_num;
2365 ctx.sa.tx_sa = tx_sa;
182879f8 2366 ctx.secy = secy;
3cf3227a
AT		 2367
2368 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2369 if (ret)
2370 goto cleanup;
2371 }
2372
c09440f7
SD		 2373 rtnl_unlock();
2374
2375 return 0;
3cf3227a
AT		 2376
2377cleanup:
2378 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2379 spin_lock_bh(&tx_sa->lock);
a21ecf0e 2380 tx_sa->next_pn_halves = prev_pn;
3cf3227a
AT		 2381 spin_unlock_bh(&tx_sa->lock);
2382 }
2383 tx_sa->active = was_active;
2384 secy->operational = was_operational;
2385 rtnl_unlock();
2386 return ret;
c09440f7
SD		 2387}
2388
2389static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2390{
2391 struct nlattr **attrs = info->attrs;
2392 struct net_device *dev;
2393 struct macsec_secy *secy;
2394 struct macsec_rx_sc *rx_sc;
2395 struct macsec_rx_sa *rx_sa;
2396 u8 assoc_num;
2397 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2398 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2399 bool was_active;
a21ecf0e 2400 pn_t prev_pn;
3cf3227a 2401 int ret = 0;
c09440f7 2402
a21ecf0e
EM		 2403 prev_pn.full64 = 0;
2404
c09440f7
SD		 2405 if (!attrs[MACSEC_ATTR_IFINDEX])
2406 return -EINVAL;
2407
2408 if (parse_rxsc_config(attrs, tb_rxsc))
2409 return -EINVAL;
2410
2411 if (parse_sa_config(attrs, tb_sa))
2412 return -EINVAL;
2413
2414 if (!validate_upd_sa(tb_sa))
2415 return -EINVAL;
2416
2417 rtnl_lock();
2418 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2419 &dev, &secy, &rx_sc, &assoc_num);
2420 if (IS_ERR(rx_sa)) {
2421 rtnl_unlock();
2422 return PTR_ERR(rx_sa);
2423 }
2424
2425 if (tb_sa[MACSEC_SA_ATTR_PN]) {
48ef50fa
EM		 2426 int pn_len;
2427
2428 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2429 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2430 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2431 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2432 rtnl_unlock();
2433 return -EINVAL;
2434 }
2435
c09440f7 2436 spin_lock_bh(&rx_sa->lock);
a21ecf0e 2437 prev_pn = rx_sa->next_pn_halves;
48ef50fa 2438 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2439 spin_unlock_bh(&rx_sa->lock);
2440 }
2441
3cf3227a 2442 was_active = rx_sa->active;
c09440f7
SD		 2443 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2444 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2445
3cf3227a
AT		 2446 /* If h/w offloading is available, propagate to the device */
2447 if (macsec_is_offloaded(netdev_priv(dev))) {
2448 const struct macsec_ops *ops;
2449 struct macsec_context ctx;
2450
2451 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2452 if (!ops) {
2453 ret = -EOPNOTSUPP;
2454 goto cleanup;
2455 }
2456
2457 ctx.sa.assoc_num = assoc_num;
2458 ctx.sa.rx_sa = rx_sa;
182879f8 2459 ctx.secy = secy;
3cf3227a
AT		 2460
2461 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2462 if (ret)
2463 goto cleanup;
2464 }
2465
c09440f7
SD		 2466 rtnl_unlock();
2467 return 0;
3cf3227a
AT		 2468
2469cleanup:
2470 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2471 spin_lock_bh(&rx_sa->lock);
a21ecf0e 2472 rx_sa->next_pn_halves = prev_pn;
3cf3227a
AT		 2473 spin_unlock_bh(&rx_sa->lock);
2474 }
2475 rx_sa->active = was_active;
2476 rtnl_unlock();
2477 return ret;
c09440f7
SD		 2478}
2479
2480static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2481{
2482 struct nlattr **attrs = info->attrs;
2483 struct net_device *dev;
2484 struct macsec_secy *secy;
2485 struct macsec_rx_sc *rx_sc;
2486 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a
AT		 2487 unsigned int prev_n_rx_sc;
2488 bool was_active;
2489 int ret;
c09440f7
SD		 2490
2491 if (!attrs[MACSEC_ATTR_IFINDEX])
2492 return -EINVAL;
2493
2494 if (parse_rxsc_config(attrs, tb_rxsc))
2495 return -EINVAL;
2496
2497 if (!validate_add_rxsc(tb_rxsc))
2498 return -EINVAL;
2499
2500 rtnl_lock();
2501 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2502 if (IS_ERR(rx_sc)) {
2503 rtnl_unlock();
2504 return PTR_ERR(rx_sc);
2505 }
2506
3cf3227a
AT		 2507 was_active = rx_sc->active;
2508 prev_n_rx_sc = secy->n_rx_sc;
c09440f7
SD		 2509 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2510 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2511
2512 if (rx_sc->active != new)
2513 secy->n_rx_sc += new ? 1 : -1;
2514
2515 rx_sc->active = new;
2516 }
2517
3cf3227a
AT		 2518 /* If h/w offloading is available, propagate to the device */
2519 if (macsec_is_offloaded(netdev_priv(dev))) {
2520 const struct macsec_ops *ops;
2521 struct macsec_context ctx;
2522
2523 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2524 if (!ops) {
2525 ret = -EOPNOTSUPP;
2526 goto cleanup;
2527 }
2528
2529 ctx.rx_sc = rx_sc;
182879f8 2530 ctx.secy = secy;
3cf3227a
AT		 2531
2532 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2533 if (ret)
2534 goto cleanup;
2535 }
2536
c09440f7
SD		 2537 rtnl_unlock();
2538
2539 return 0;
3cf3227a
AT		 2540
2541cleanup:
2542 secy->n_rx_sc = prev_n_rx_sc;
2543 rx_sc->active = was_active;
2544 rtnl_unlock();
2545 return ret;
c09440f7
SD		 2546}
2547
dcb780fb
AT		 2548static bool macsec_is_configured(struct macsec_dev *macsec)
2549{
2550 struct macsec_secy *secy = &macsec->secy;
2551 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2552 int i;
2553
2554 if (secy->n_rx_sc > 0)
2555 return true;
2556
2557 for (i = 0; i < MACSEC_NUM_AN; i++)
2558 if (tx_sc->sa[i])
2559 return true;
2560
2561 return false;
2562}
2563
2564static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2565{
2566 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2567 enum macsec_offload offload, prev_offload;
2568 int (*func)(struct macsec_context *ctx);
2569 struct nlattr **attrs = info->attrs;
a249f805 2570 struct net_device *dev;
dcb780fb
AT		 2571 const struct macsec_ops *ops;
2572 struct macsec_context ctx;
2573 struct macsec_dev *macsec;
dcb780fb
AT		 2574 int ret;
2575
2576 if (!attrs[MACSEC_ATTR_IFINDEX])
2577 return -EINVAL;
2578
2579 if (!attrs[MACSEC_ATTR_OFFLOAD])
2580 return -EINVAL;
2581
2582 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2583 attrs[MACSEC_ATTR_OFFLOAD],
2584 macsec_genl_offload_policy, NULL))
2585 return -EINVAL;
2586
2587 dev = get_dev_from_nl(genl_info_net(info), attrs);
2588 if (IS_ERR(dev))
2589 return PTR_ERR(dev);
2590 macsec = macsec_priv(dev);
2591
2592 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2593 if (macsec->offload == offload)
2594 return 0;
2595
2596 /* Check if the offloading mode is supported by the underlying layers */
2597 if (offload != MACSEC_OFFLOAD_OFF &&
2598 !macsec_check_offload(offload, macsec))
2599 return -EOPNOTSUPP;
2600
dcb780fb
AT		 2601 /* Check if the net device is busy. */
2602 if (netif_running(dev))
2603 return -EBUSY;
2604
2605 rtnl_lock();
2606
2607 prev_offload = macsec->offload;
2608 macsec->offload = offload;
2609
2610 /* Check if the device already has rules configured: we do not support
2611 * rules migration.
2612 */
2613 if (macsec_is_configured(macsec)) {
2614 ret = -EBUSY;
2615 goto rollback;
2616 }
2617
2618 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2619 macsec, &ctx);
2620 if (!ops) {
2621 ret = -EOPNOTSUPP;
2622 goto rollback;
2623 }
2624
2625 if (prev_offload == MACSEC_OFFLOAD_OFF)
2626 func = ops->mdo_add_secy;
2627 else
2628 func = ops->mdo_del_secy;
2629
2630 ctx.secy = &macsec->secy;
2631 ret = macsec_offload(func, &ctx);
2632 if (ret)
2633 goto rollback;
2634
2635 rtnl_unlock();
c850240b
MS		 2636 /* Force features update, since they are different for SW MACSec and
2637 * HW offloading cases.
2638 */
2639 netdev_update_features(dev);
dcb780fb
AT		 2640 return 0;
2641
2642rollback:
2643 macsec->offload = prev_offload;
2644
2645 rtnl_unlock();
2646 return ret;
2647}
2648
b62c3624
DB		 2649static void get_tx_sa_stats(struct net_device *dev, int an,
2650 struct macsec_tx_sa *tx_sa,
2651 struct macsec_tx_sa_stats *sum)
c09440f7 2652{
b62c3624 2653 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2654 int cpu;
2655
b62c3624
DB		 2656 /* If h/w offloading is available, propagate to the device */
2657 if (macsec_is_offloaded(macsec)) {
2658 const struct macsec_ops *ops;
2659 struct macsec_context ctx;
2660
2661 ops = macsec_get_ops(macsec, &ctx);
2662 if (ops) {
2663 ctx.sa.assoc_num = an;
2664 ctx.sa.tx_sa = tx_sa;
2665 ctx.stats.tx_sa_stats = sum;
2666 ctx.secy = &macsec_priv(dev)->secy;
2667 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2668 }
2669 return;
2670 }
2671
c09440f7 2672 for_each_possible_cpu(cpu) {
b62c3624
DB		 2673 const struct macsec_tx_sa_stats *stats =
2674 per_cpu_ptr(tx_sa->stats, cpu);
c09440f7 2675
b62c3624
DB		 2676 sum->OutPktsProtected += stats->OutPktsProtected;
2677 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
c09440f7 2678 }
b62c3624 2679}
c09440f7 2680
b62c3624
DB		 2681static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2682{
2683 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2684 sum->OutPktsProtected) ||
2685 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2686 sum->OutPktsEncrypted))
c09440f7
SD		 2687 return -EMSGSIZE;
2688
2689 return 0;
2690}
2691
b62c3624
DB		 2692static void get_rx_sa_stats(struct net_device *dev,
2693 struct macsec_rx_sc *rx_sc, int an,
2694 struct macsec_rx_sa *rx_sa,
2695 struct macsec_rx_sa_stats *sum)
c09440f7 2696{
b62c3624 2697 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2698 int cpu;
2699
b62c3624
DB		 2700 /* If h/w offloading is available, propagate to the device */
2701 if (macsec_is_offloaded(macsec)) {
2702 const struct macsec_ops *ops;
2703 struct macsec_context ctx;
2704
2705 ops = macsec_get_ops(macsec, &ctx);
2706 if (ops) {
2707 ctx.sa.assoc_num = an;
2708 ctx.sa.rx_sa = rx_sa;
2709 ctx.stats.rx_sa_stats = sum;
2710 ctx.secy = &macsec_priv(dev)->secy;
2711 ctx.rx_sc = rx_sc;
2712 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2713 }
2714 return;
2715 }
2716
c09440f7 2717 for_each_possible_cpu(cpu) {
b62c3624
DB		 2718 const struct macsec_rx_sa_stats *stats =
2719 per_cpu_ptr(rx_sa->stats, cpu);
c09440f7 2720
b62c3624
DB		 2721 sum->InPktsOK += stats->InPktsOK;
2722 sum->InPktsInvalid += stats->InPktsInvalid;
2723 sum->InPktsNotValid += stats->InPktsNotValid;
2724 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2725 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
c09440f7 2726 }
b62c3624 2727}
c09440f7 2728
b62c3624
DB		 2729static int copy_rx_sa_stats(struct sk_buff *skb,
2730 struct macsec_rx_sa_stats *sum)
2731{
2732 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2733 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2734 sum->InPktsInvalid) ||
2735 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2736 sum->InPktsNotValid) ||
2737 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2738 sum->InPktsNotUsingSA) ||
2739 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2740 sum->InPktsUnusedSA))
c09440f7
SD		 2741 return -EMSGSIZE;
2742
2743 return 0;
2744}
2745
b62c3624
DB		 2746static void get_rx_sc_stats(struct net_device *dev,
2747 struct macsec_rx_sc *rx_sc,
2748 struct macsec_rx_sc_stats *sum)
c09440f7 2749{
b62c3624 2750 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2751 int cpu;
2752
b62c3624
DB		 2753 /* If h/w offloading is available, propagate to the device */
2754 if (macsec_is_offloaded(macsec)) {
2755 const struct macsec_ops *ops;
2756 struct macsec_context ctx;
2757
2758 ops = macsec_get_ops(macsec, &ctx);
2759 if (ops) {
2760 ctx.stats.rx_sc_stats = sum;
2761 ctx.secy = &macsec_priv(dev)->secy;
2762 ctx.rx_sc = rx_sc;
2763 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2764 }
2765 return;
2766 }
2767
c09440f7
SD		 2768 for_each_possible_cpu(cpu) {
2769 const struct pcpu_rx_sc_stats *stats;
2770 struct macsec_rx_sc_stats tmp;
2771 unsigned int start;
2772
b62c3624 2773 stats = per_cpu_ptr(rx_sc->stats, cpu);
c09440f7
SD		 2774 do {
2775 start = u64_stats_fetch_begin_irq(&stats->syncp);
2776 memcpy(&tmp, &stats->stats, sizeof(tmp));
2777 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2778
b62c3624
DB		 2779 sum->InOctetsValidated += tmp.InOctetsValidated;
2780 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2781 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2782 sum->InPktsDelayed += tmp.InPktsDelayed;
2783 sum->InPktsOK += tmp.InPktsOK;
2784 sum->InPktsInvalid += tmp.InPktsInvalid;
2785 sum->InPktsLate += tmp.InPktsLate;
2786 sum->InPktsNotValid += tmp.InPktsNotValid;
2787 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2788 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
c09440f7 2789 }
b62c3624 2790}
c09440f7 2791
b62c3624
DB		 2792static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2793{
f60d94c0 2794 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
b62c3624 2795 sum->InOctetsValidated,
f60d94c0
ND		 2796 MACSEC_RXSC_STATS_ATTR_PAD) ||
2797 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
b62c3624 2798 sum->InOctetsDecrypted,
f60d94c0
ND		 2799 MACSEC_RXSC_STATS_ATTR_PAD) ||
2800 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
b62c3624 2801 sum->InPktsUnchecked,
f60d94c0
ND		 2802 MACSEC_RXSC_STATS_ATTR_PAD) ||
2803 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
b62c3624 2804 sum->InPktsDelayed,
f60d94c0
ND		 2805 MACSEC_RXSC_STATS_ATTR_PAD) ||
2806 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
b62c3624 2807 sum->InPktsOK,
f60d94c0
ND		 2808 MACSEC_RXSC_STATS_ATTR_PAD) ||
2809 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
b62c3624 2810 sum->InPktsInvalid,
f60d94c0
ND		 2811 MACSEC_RXSC_STATS_ATTR_PAD) ||
2812 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
b62c3624 2813 sum->InPktsLate,
f60d94c0
ND		 2814 MACSEC_RXSC_STATS_ATTR_PAD) ||
2815 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
b62c3624 2816 sum->InPktsNotValid,
f60d94c0
ND		 2817 MACSEC_RXSC_STATS_ATTR_PAD) ||
2818 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
b62c3624 2819 sum->InPktsNotUsingSA,
f60d94c0
ND		 2820 MACSEC_RXSC_STATS_ATTR_PAD) ||
2821 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
b62c3624 2822 sum->InPktsUnusedSA,
f60d94c0 2823 MACSEC_RXSC_STATS_ATTR_PAD))
c09440f7
SD		 2824 return -EMSGSIZE;
2825
2826 return 0;
2827}
2828
b62c3624
DB		 2829static void get_tx_sc_stats(struct net_device *dev,
2830 struct macsec_tx_sc_stats *sum)
c09440f7 2831{
b62c3624 2832 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2833 int cpu;
2834
b62c3624
DB		 2835 /* If h/w offloading is available, propagate to the device */
2836 if (macsec_is_offloaded(macsec)) {
2837 const struct macsec_ops *ops;
2838 struct macsec_context ctx;
2839
2840 ops = macsec_get_ops(macsec, &ctx);
2841 if (ops) {
2842 ctx.stats.tx_sc_stats = sum;
2843 ctx.secy = &macsec_priv(dev)->secy;
2844 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2845 }
2846 return;
2847 }
2848
c09440f7
SD		 2849 for_each_possible_cpu(cpu) {
2850 const struct pcpu_tx_sc_stats *stats;
2851 struct macsec_tx_sc_stats tmp;
2852 unsigned int start;
2853
b62c3624 2854 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
c09440f7
SD		 2855 do {
2856 start = u64_stats_fetch_begin_irq(&stats->syncp);
2857 memcpy(&tmp, &stats->stats, sizeof(tmp));
2858 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2859
b62c3624
DB		 2860 sum->OutPktsProtected += tmp.OutPktsProtected;
2861 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2862 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2863 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
c09440f7 2864 }
b62c3624 2865}
c09440f7 2866
b62c3624
DB		 2867static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2868{
f60d94c0 2869 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
b62c3624 2870 sum->OutPktsProtected,
f60d94c0
ND		 2871 MACSEC_TXSC_STATS_ATTR_PAD) ||
2872 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
b62c3624 2873 sum->OutPktsEncrypted,
f60d94c0
ND		 2874 MACSEC_TXSC_STATS_ATTR_PAD) ||
2875 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
b62c3624 2876 sum->OutOctetsProtected,
f60d94c0
ND		 2877 MACSEC_TXSC_STATS_ATTR_PAD) ||
2878 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
b62c3624 2879 sum->OutOctetsEncrypted,
f60d94c0 2880 MACSEC_TXSC_STATS_ATTR_PAD))
c09440f7
SD		 2881 return -EMSGSIZE;
2882
2883 return 0;
2884}
2885
b62c3624 2886static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
c09440f7 2887{
b62c3624 2888 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2889 int cpu;
2890
b62c3624
DB		 2891 /* If h/w offloading is available, propagate to the device */
2892 if (macsec_is_offloaded(macsec)) {
2893 const struct macsec_ops *ops;
2894 struct macsec_context ctx;
2895
2896 ops = macsec_get_ops(macsec, &ctx);
2897 if (ops) {
2898 ctx.stats.dev_stats = sum;
2899 ctx.secy = &macsec_priv(dev)->secy;
2900 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2901 }
2902 return;
2903 }
2904
c09440f7
SD		 2905 for_each_possible_cpu(cpu) {
2906 const struct pcpu_secy_stats *stats;
2907 struct macsec_dev_stats tmp;
2908 unsigned int start;
2909
b62c3624 2910 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
c09440f7
SD		 2911 do {
2912 start = u64_stats_fetch_begin_irq(&stats->syncp);
2913 memcpy(&tmp, &stats->stats, sizeof(tmp));
2914 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2915
b62c3624
DB		 2916 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2917 sum->InPktsUntagged += tmp.InPktsUntagged;
2918 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2919 sum->InPktsNoTag += tmp.InPktsNoTag;
2920 sum->InPktsBadTag += tmp.InPktsBadTag;
2921 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2922 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2923 sum->InPktsOverrun += tmp.InPktsOverrun;
c09440f7 2924 }
b62c3624 2925}
c09440f7 2926
b62c3624
DB		 2927static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2928{
f60d94c0 2929 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
b62c3624 2930 sum->OutPktsUntagged,
f60d94c0
ND		 2931 MACSEC_SECY_STATS_ATTR_PAD) ||
2932 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
b62c3624 2933 sum->InPktsUntagged,
f60d94c0
ND		 2934 MACSEC_SECY_STATS_ATTR_PAD) ||
2935 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
b62c3624 2936 sum->OutPktsTooLong,
f60d94c0
ND		 2937 MACSEC_SECY_STATS_ATTR_PAD) ||
2938 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
b62c3624 2939 sum->InPktsNoTag,
f60d94c0
ND		 2940 MACSEC_SECY_STATS_ATTR_PAD) ||
2941 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
b62c3624 2942 sum->InPktsBadTag,
f60d94c0
ND		 2943 MACSEC_SECY_STATS_ATTR_PAD) ||
2944 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
b62c3624 2945 sum->InPktsUnknownSCI,
f60d94c0
ND		 2946 MACSEC_SECY_STATS_ATTR_PAD) ||
2947 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
b62c3624 2948 sum->InPktsNoSCI,
f60d94c0
ND		 2949 MACSEC_SECY_STATS_ATTR_PAD) ||
2950 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
b62c3624 2951 sum->InPktsOverrun,
f60d94c0 2952 MACSEC_SECY_STATS_ATTR_PAD))
c09440f7
SD		 2953 return -EMSGSIZE;
2954
2955 return 0;
2956}
2957
2958static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2959{
2960 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ae0be8de
MK		 2961 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2962 MACSEC_ATTR_SECY);
ccfdec90 2963 u64 csid;
c09440f7
SD		 2964
2965 if (!secy_nest)
2966 return 1;
2967
ccfdec90
FW		 2968 switch (secy->key_len) {
2969 case MACSEC_GCM_AES_128_SAK_LEN:
48ef50fa 2970 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 2971 break;
2972 case MACSEC_GCM_AES_256_SAK_LEN:
48ef50fa 2973 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
ccfdec90
FW		 2974 break;
2975 default:
2976 goto cancel;
2977 }
2978
f60d94c0
ND		 2979 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2980 MACSEC_SECY_ATTR_PAD) ||
2981 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
ccfdec90 2982 csid, MACSEC_SECY_ATTR_PAD) ||
c09440f7
SD		 2983 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2984 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2985 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2986 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2987 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2988 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2989 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2990 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2991 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2992 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2993 goto cancel;
2994
2995 if (secy->replay_protect) {
2996 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2997 goto cancel;
2998 }
2999
3000 nla_nest_end(skb, secy_nest);
3001 return 0;
3002
3003cancel:
3004 nla_nest_cancel(skb, secy_nest);
3005 return 1;
3006}
3007
e1427237
FW		 3008static noinline_for_stack int
3009dump_secy(struct macsec_secy *secy, struct net_device *dev,
3010 struct sk_buff *skb, struct netlink_callback *cb)
c09440f7 3011{
b62c3624
DB		 3012 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3013 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3014 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3015 struct macsec_rx_sa_stats rx_sa_stats = {0, };
dcb780fb 3016 struct macsec_dev *macsec = netdev_priv(dev);
b62c3624 3017 struct macsec_dev_stats dev_stats = {0, };
c09440f7
SD		 3018 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3019 struct nlattr *txsa_list, *rxsc_list;
dcb780fb 3020 struct macsec_rx_sc *rx_sc;
c09440f7 3021 struct nlattr *attr;
dcb780fb
AT		 3022 void *hdr;
3023 int i, j;
c09440f7
SD		 3024
3025 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3026 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3027 if (!hdr)
3028 return -EMSGSIZE;
3029
0a833c29 3030 genl_dump_check_consistent(cb, hdr);
c09440f7
SD		 3031
3032 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3033 goto nla_put_failure;
3034
dcb780fb
AT		 3035 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3036 if (!attr)
3037 goto nla_put_failure;
3038 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3039 goto nla_put_failure;
3040 nla_nest_end(skb, attr);
3041
c09440f7
SD		 3042 if (nla_put_secy(secy, skb))
3043 goto nla_put_failure;
3044
ae0be8de 3045 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
c09440f7
SD		 3046 if (!attr)
3047 goto nla_put_failure;
b62c3624
DB		 3048
3049 get_tx_sc_stats(dev, &tx_sc_stats);
3050 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
c09440f7
SD		 3051 nla_nest_cancel(skb, attr);
3052 goto nla_put_failure;
3053 }
3054 nla_nest_end(skb, attr);
3055
ae0be8de 3056 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
c09440f7
SD		 3057 if (!attr)
3058 goto nla_put_failure;
b62c3624
DB		 3059 get_secy_stats(dev, &dev_stats);
3060 if (copy_secy_stats(skb, &dev_stats)) {
c09440f7
SD		 3061 nla_nest_cancel(skb, attr);
3062 goto nla_put_failure;
3063 }
3064 nla_nest_end(skb, attr);
3065
ae0be8de 3066 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
c09440f7
SD		 3067 if (!txsa_list)
3068 goto nla_put_failure;
3069 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3070 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3071 struct nlattr *txsa_nest;
48ef50fa
EM		 3072 u64 pn;
3073 int pn_len;
c09440f7
SD		 3074
3075 if (!tx_sa)
3076 continue;
3077
ae0be8de 3078 txsa_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 3079 if (!txsa_nest) {
3080 nla_nest_cancel(skb, txsa_list);
3081 goto nla_put_failure;
3082 }
3083
b62c3624
DB		 3084 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3085 if (!attr) {
3086 nla_nest_cancel(skb, txsa_nest);
3087 nla_nest_cancel(skb, txsa_list);
3088 goto nla_put_failure;
3089 }
3090 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3091 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3092 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3093 nla_nest_cancel(skb, attr);
3094 nla_nest_cancel(skb, txsa_nest);
3095 nla_nest_cancel(skb, txsa_list);
3096 goto nla_put_failure;
3097 }
3098 nla_nest_end(skb, attr);
3099
48ef50fa
EM		 3100 if (secy->xpn) {
3101 pn = tx_sa->next_pn;
3102 pn_len = MACSEC_XPN_PN_LEN;
3103 } else {
3104 pn = tx_sa->next_pn_halves.lower;
3105 pn_len = MACSEC_DEFAULT_PN_LEN;
3106 }
3107
c09440f7 3108 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
48ef50fa 3109 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
8acca6ac 3110 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
48ef50fa 3111 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
c09440f7
SD		 3112 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3113 nla_nest_cancel(skb, txsa_nest);
3114 nla_nest_cancel(skb, txsa_list);
3115 goto nla_put_failure;
3116 }
3117
c09440f7
SD		 3118 nla_nest_end(skb, txsa_nest);
3119 }
3120 nla_nest_end(skb, txsa_list);
3121
ae0be8de 3122 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
c09440f7
SD		 3123 if (!rxsc_list)
3124 goto nla_put_failure;
3125
3126 j = 1;
3127 for_each_rxsc_rtnl(secy, rx_sc) {
3128 int k;
3129 struct nlattr *rxsa_list;
ae0be8de 3130 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 3131
3132 if (!rxsc_nest) {
3133 nla_nest_cancel(skb, rxsc_list);
3134 goto nla_put_failure;
3135 }
3136
3137 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
f60d94c0
ND		 3138 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3139 MACSEC_RXSC_ATTR_PAD)) {
c09440f7
SD		 3140 nla_nest_cancel(skb, rxsc_nest);
3141 nla_nest_cancel(skb, rxsc_list);
3142 goto nla_put_failure;
3143 }
3144
ae0be8de 3145 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
c09440f7
SD		 3146 if (!attr) {
3147 nla_nest_cancel(skb, rxsc_nest);
3148 nla_nest_cancel(skb, rxsc_list);
3149 goto nla_put_failure;
3150 }
b62c3624
DB		 3151 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3152 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3153 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
c09440f7
SD		 3154 nla_nest_cancel(skb, attr);
3155 nla_nest_cancel(skb, rxsc_nest);
3156 nla_nest_cancel(skb, rxsc_list);
3157 goto nla_put_failure;
3158 }
3159 nla_nest_end(skb, attr);
3160
ae0be8de
MK		 3161 rxsa_list = nla_nest_start_noflag(skb,
3162 MACSEC_RXSC_ATTR_SA_LIST);
c09440f7
SD		 3163 if (!rxsa_list) {
3164 nla_nest_cancel(skb, rxsc_nest);
3165 nla_nest_cancel(skb, rxsc_list);
3166 goto nla_put_failure;
3167 }
3168
3169 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3170 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3171 struct nlattr *rxsa_nest;
48ef50fa
EM		 3172 u64 pn;
3173 int pn_len;
c09440f7
SD		 3174
3175 if (!rx_sa)
3176 continue;
3177
ae0be8de 3178 rxsa_nest = nla_nest_start_noflag(skb, k++);
c09440f7
SD		 3179 if (!rxsa_nest) {
3180 nla_nest_cancel(skb, rxsa_list);
3181 nla_nest_cancel(skb, rxsc_nest);
3182 nla_nest_cancel(skb, rxsc_list);
3183 goto nla_put_failure;
3184 }
3185
ae0be8de
MK		 3186 attr = nla_nest_start_noflag(skb,
3187 MACSEC_SA_ATTR_STATS);
c09440f7
SD		 3188 if (!attr) {
3189 nla_nest_cancel(skb, rxsa_list);
3190 nla_nest_cancel(skb, rxsc_nest);
3191 nla_nest_cancel(skb, rxsc_list);
3192 goto nla_put_failure;
3193 }
b62c3624
DB		 3194 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3195 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3196 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
c09440f7
SD		 3197 nla_nest_cancel(skb, attr);
3198 nla_nest_cancel(skb, rxsa_list);
3199 nla_nest_cancel(skb, rxsc_nest);
3200 nla_nest_cancel(skb, rxsc_list);
3201 goto nla_put_failure;
3202 }
3203 nla_nest_end(skb, attr);
3204
48ef50fa
EM		 3205 if (secy->xpn) {
3206 pn = rx_sa->next_pn;
3207 pn_len = MACSEC_XPN_PN_LEN;
3208 } else {
3209 pn = rx_sa->next_pn_halves.lower;
3210 pn_len = MACSEC_DEFAULT_PN_LEN;
3211 }
3212
c09440f7 3213 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
48ef50fa 3214 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
8acca6ac 3215 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
48ef50fa 3216 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
c09440f7
SD		 3217 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3218 nla_nest_cancel(skb, rxsa_nest);
3219 nla_nest_cancel(skb, rxsc_nest);
3220 nla_nest_cancel(skb, rxsc_list);
3221 goto nla_put_failure;
3222 }
3223 nla_nest_end(skb, rxsa_nest);
3224 }
3225
3226 nla_nest_end(skb, rxsa_list);
3227 nla_nest_end(skb, rxsc_nest);
3228 }
3229
3230 nla_nest_end(skb, rxsc_list);
3231
c09440f7
SD		 3232 genlmsg_end(skb, hdr);
3233
3234 return 0;
3235
3236nla_put_failure:
c09440f7
SD		 3237 genlmsg_cancel(skb, hdr);
3238 return -EMSGSIZE;
3239}
3240
96cfc505
SD		 3241static int macsec_generation = 1; /* protected by RTNL */
3242
c09440f7
SD		 3243static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3244{
3245 struct net *net = sock_net(skb->sk);
3246 struct net_device *dev;
3247 int dev_idx, d;
3248
3249 dev_idx = cb->args[0];
3250
3251 d = 0;
c10c63ea 3252 rtnl_lock();
96cfc505
SD		 3253
3254 cb->seq = macsec_generation;
3255
c09440f7
SD		 3256 for_each_netdev(net, dev) {
3257 struct macsec_secy *secy;
3258
3259 if (d < dev_idx)
3260 goto next;
3261
3262 if (!netif_is_macsec(dev))
3263 goto next;
3264
3265 secy = &macsec_priv(dev)->secy;
3266 if (dump_secy(secy, dev, skb, cb) < 0)
3267 goto done;
3268next:
3269 d++;
3270 }
3271
3272done:
c10c63ea 3273 rtnl_unlock();
c09440f7
SD		 3274 cb->args[0] = d;
3275 return skb->len;
3276}
3277
3278static const struct genl_ops macsec_genl_ops[] = {
3279 {
3280 .cmd = MACSEC_CMD_GET_TXSC,
ef6243ac 3281 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3282 .dumpit = macsec_dump_txsc,
c09440f7
SD		 3283 },
3284 {
3285 .cmd = MACSEC_CMD_ADD_RXSC,
ef6243ac 3286 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3287 .doit = macsec_add_rxsc,
c09440f7
SD		 3288 .flags = GENL_ADMIN_PERM,
3289 },
3290 {
3291 .cmd = MACSEC_CMD_DEL_RXSC,
ef6243ac 3292 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3293 .doit = macsec_del_rxsc,
c09440f7
SD		 3294 .flags = GENL_ADMIN_PERM,
3295 },
3296 {
3297 .cmd = MACSEC_CMD_UPD_RXSC,
ef6243ac 3298 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3299 .doit = macsec_upd_rxsc,
c09440f7
SD		 3300 .flags = GENL_ADMIN_PERM,
3301 },
3302 {
3303 .cmd = MACSEC_CMD_ADD_TXSA,
ef6243ac 3304 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3305 .doit = macsec_add_txsa,
c09440f7
SD		 3306 .flags = GENL_ADMIN_PERM,
3307 },
3308 {
3309 .cmd = MACSEC_CMD_DEL_TXSA,
ef6243ac 3310 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3311 .doit = macsec_del_txsa,
c09440f7
SD		 3312 .flags = GENL_ADMIN_PERM,
3313 },
3314 {
3315 .cmd = MACSEC_CMD_UPD_TXSA,
ef6243ac 3316 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3317 .doit = macsec_upd_txsa,
c09440f7
SD		 3318 .flags = GENL_ADMIN_PERM,
3319 },
3320 {
3321 .cmd = MACSEC_CMD_ADD_RXSA,
ef6243ac 3322 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3323 .doit = macsec_add_rxsa,
c09440f7
SD		 3324 .flags = GENL_ADMIN_PERM,
3325 },
3326 {
3327 .cmd = MACSEC_CMD_DEL_RXSA,
ef6243ac 3328 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3329 .doit = macsec_del_rxsa,
c09440f7
SD		 3330 .flags = GENL_ADMIN_PERM,
3331 },
3332 {
3333 .cmd = MACSEC_CMD_UPD_RXSA,
ef6243ac 3334 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3335 .doit = macsec_upd_rxsa,
c09440f7
SD		 3336 .flags = GENL_ADMIN_PERM,
3337 },
dcb780fb
AT		 3338 {
3339 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3340 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3341 .doit = macsec_upd_offload,
3342 .flags = GENL_ADMIN_PERM,
3343 },
c09440f7
SD		 3344};
3345
56989f6d 3346static struct genl_family macsec_fam __ro_after_init = {
489111e5
JB		 3347 .name = MACSEC_GENL_NAME,
3348 .hdrsize = 0,
3349 .version = MACSEC_GENL_VERSION,
3350 .maxattr = MACSEC_ATTR_MAX,
3b0f31f2 3351 .policy = macsec_genl_policy,
489111e5
JB		 3352 .netnsok = true,
3353 .module = THIS_MODULE,
3354 .ops = macsec_genl_ops,
3355 .n_ops = ARRAY_SIZE(macsec_genl_ops),
3356};
3357
c09440f7
SD		 3358static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3359 struct net_device *dev)
3360{
3361 struct macsec_dev *macsec = netdev_priv(dev);
3362 struct macsec_secy *secy = &macsec->secy;
3363 struct pcpu_secy_stats *secy_stats;
3364 int ret, len;
3365
3cf3227a
AT		 3366 if (macsec_is_offloaded(netdev_priv(dev))) {
3367 skb->dev = macsec->real_dev;
3368 return dev_queue_xmit(skb);
3369 }
3370
c09440f7
SD		 3371 /* 10.5 */
3372 if (!secy->protect_frames) {
3373 secy_stats = this_cpu_ptr(macsec->stats);
3374 u64_stats_update_begin(&secy_stats->syncp);
3375 secy_stats->stats.OutPktsUntagged++;
3376 u64_stats_update_end(&secy_stats->syncp);
79c62220 3377 skb->dev = macsec->real_dev;
c09440f7
SD		 3378 len = skb->len;
3379 ret = dev_queue_xmit(skb);
3380 count_tx(dev, ret, len);
3381 return ret;
3382 }
3383
3384 if (!secy->operational) {
3385 kfree_skb(skb);
3386 dev->stats.tx_dropped++;
3387 return NETDEV_TX_OK;
3388 }
3389
3390 skb = macsec_encrypt(skb, dev);
3391 if (IS_ERR(skb)) {
3392 if (PTR_ERR(skb) != -EINPROGRESS)
3393 dev->stats.tx_dropped++;
3394 return NETDEV_TX_OK;
3395 }
3396
3397 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3398
3399 macsec_encrypt_finish(skb, dev);
3400 len = skb->len;
3401 ret = dev_queue_xmit(skb);
3402 count_tx(dev, ret, len);
3403 return ret;
3404}
3405
c850240b 3406#define SW_MACSEC_FEATURES \
c09440f7 3407 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
e2003872 3408
c850240b
MS		 3409/* If h/w offloading is enabled, use real device features save for
3410 * VLAN_FEATURES - they require additional ops
3411 * HW_MACSEC - no reason to report it
3412 */
3413#define REAL_DEV_FEATURES(dev) \
3414 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3415
c09440f7
SD		 3416static int macsec_dev_init(struct net_device *dev)
3417{
3418 struct macsec_dev *macsec = macsec_priv(dev);
3419 struct net_device *real_dev = macsec->real_dev;
5491e7c6 3420 int err;
c09440f7
SD		 3421
3422 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3423 if (!dev->tstats)
3424 return -ENOMEM;
3425
5491e7c6
PA		 3426 err = gro_cells_init(&macsec->gro_cells, dev);
3427 if (err) {
3428 free_percpu(dev->tstats);
3429 return err;
3430 }
3431
c850240b
MS		 3432 if (macsec_is_offloaded(macsec)) {
3433 dev->features = REAL_DEV_FEATURES(real_dev);
3434 } else {
3435 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3436 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3437 }
c09440f7
SD		 3438
3439 dev->needed_headroom = real_dev->needed_headroom +
3440 MACSEC_NEEDED_HEADROOM;
3441 dev->needed_tailroom = real_dev->needed_tailroom +
3442 MACSEC_NEEDED_TAILROOM;
3443
3444 if (is_zero_ether_addr(dev->dev_addr))
3445 eth_hw_addr_inherit(dev, real_dev);
3446 if (is_zero_ether_addr(dev->broadcast))
3447 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3448
3449 return 0;
3450}
3451
3452static void macsec_dev_uninit(struct net_device *dev)
3453{
5491e7c6
PA		 3454 struct macsec_dev *macsec = macsec_priv(dev);
3455
3456 gro_cells_destroy(&macsec->gro_cells);
c09440f7
SD		 3457 free_percpu(dev->tstats);
3458}
3459
3460static netdev_features_t macsec_fix_features(struct net_device *dev,
3461 netdev_features_t features)
3462{
3463 struct macsec_dev *macsec = macsec_priv(dev);
3464 struct net_device *real_dev = macsec->real_dev;
3465
c850240b
MS		 3466 if (macsec_is_offloaded(macsec))
3467 return REAL_DEV_FEATURES(real_dev);
3468
3469 features &= (real_dev->features & SW_MACSEC_FEATURES) |
5491e7c6
PA		 3470 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3471 features |= NETIF_F_LLTX;
c09440f7
SD		 3472
3473 return features;
3474}
3475
3476static int macsec_dev_open(struct net_device *dev)
3477{
3478 struct macsec_dev *macsec = macsec_priv(dev);
3479 struct net_device *real_dev = macsec->real_dev;
3480 int err;
3481
c09440f7
SD		 3482 err = dev_uc_add(real_dev, dev->dev_addr);
3483 if (err < 0)
3484 return err;
3485
3486 if (dev->flags & IFF_ALLMULTI) {
3487 err = dev_set_allmulti(real_dev, 1);
3488 if (err < 0)
3489 goto del_unicast;
3490 }
3491
3492 if (dev->flags & IFF_PROMISC) {
3493 err = dev_set_promiscuity(real_dev, 1);
3494 if (err < 0)
3495 goto clear_allmulti;
3496 }
3497
3cf3227a
AT		 3498 /* If h/w offloading is available, propagate to the device */
3499 if (macsec_is_offloaded(macsec)) {
3500 const struct macsec_ops *ops;
3501 struct macsec_context ctx;
3502
3503 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3504 if (!ops) {
3505 err = -EOPNOTSUPP;
3506 goto clear_allmulti;
3507 }
3508
182879f8 3509 ctx.secy = &macsec->secy;
3cf3227a
AT		 3510 err = macsec_offload(ops->mdo_dev_open, &ctx);
3511 if (err)
3512 goto clear_allmulti;
3513 }
3514
c09440f7
SD		 3515 if (netif_carrier_ok(real_dev))
3516 netif_carrier_on(dev);
3517
3518 return 0;
3519clear_allmulti:
3520 if (dev->flags & IFF_ALLMULTI)
3521 dev_set_allmulti(real_dev, -1);
3522del_unicast:
3523 dev_uc_del(real_dev, dev->dev_addr);
3524 netif_carrier_off(dev);
3525 return err;
3526}
3527
3528static int macsec_dev_stop(struct net_device *dev)
3529{
3530 struct macsec_dev *macsec = macsec_priv(dev);
3531 struct net_device *real_dev = macsec->real_dev;
3532
3533 netif_carrier_off(dev);
3534
3cf3227a
AT		 3535 /* If h/w offloading is available, propagate to the device */
3536 if (macsec_is_offloaded(macsec)) {
3537 const struct macsec_ops *ops;
3538 struct macsec_context ctx;
3539
3540 ops = macsec_get_ops(macsec, &ctx);
182879f8
DB		 3541 if (ops) {
3542 ctx.secy = &macsec->secy;
3cf3227a 3543 macsec_offload(ops->mdo_dev_stop, &ctx);
182879f8 3544 }
3cf3227a
AT		 3545 }
3546
c09440f7
SD		 3547 dev_mc_unsync(real_dev, dev);
3548 dev_uc_unsync(real_dev, dev);
3549
3550 if (dev->flags & IFF_ALLMULTI)
3551 dev_set_allmulti(real_dev, -1);
3552
3553 if (dev->flags & IFF_PROMISC)
3554 dev_set_promiscuity(real_dev, -1);
3555
3556 dev_uc_del(real_dev, dev->dev_addr);
3557
3558 return 0;
3559}
3560
3561static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3562{
3563 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3564
3565 if (!(dev->flags & IFF_UP))
3566 return;
3567
3568 if (change & IFF_ALLMULTI)
3569 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3570
3571 if (change & IFF_PROMISC)
3572 dev_set_promiscuity(real_dev,
3573 dev->flags & IFF_PROMISC ? 1 : -1);
3574}
3575
3576static void macsec_dev_set_rx_mode(struct net_device *dev)
3577{
3578 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3579
3580 dev_mc_sync(real_dev, dev);
3581 dev_uc_sync(real_dev, dev);
3582}
3583
3584static int macsec_set_mac_address(struct net_device *dev, void *p)
3585{
3586 struct macsec_dev *macsec = macsec_priv(dev);
3587 struct net_device *real_dev = macsec->real_dev;
3588 struct sockaddr *addr = p;
3589 int err;
3590
3591 if (!is_valid_ether_addr(addr->sa_data))
3592 return -EADDRNOTAVAIL;
3593
3594 if (!(dev->flags & IFF_UP))
3595 goto out;
3596
3597 err = dev_uc_add(real_dev, addr->sa_data);
3598 if (err < 0)
3599 return err;
3600
3601 dev_uc_del(real_dev, dev->dev_addr);
3602
3603out:
3604 ether_addr_copy(dev->dev_addr, addr->sa_data);
6fc498bc 3605 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
09f4136c
DB		 3606
3607 /* If h/w offloading is available, propagate to the device */
3608 if (macsec_is_offloaded(macsec)) {
3609 const struct macsec_ops *ops;
3610 struct macsec_context ctx;
3611
3612 ops = macsec_get_ops(macsec, &ctx);
3613 if (ops) {
3614 ctx.secy = &macsec->secy;
3615 macsec_offload(ops->mdo_upd_secy, &ctx);
3616 }
3617 }
3618
c09440f7
SD		 3619 return 0;
3620}
3621
3622static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3623{
3624 struct macsec_dev *macsec = macsec_priv(dev);
3625 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3626
3627 if (macsec->real_dev->mtu - extra < new_mtu)
3628 return -ERANGE;
3629
3630 dev->mtu = new_mtu;
3631
3632 return 0;
3633}
3634
bc1f4470 3635static void macsec_get_stats64(struct net_device *dev,
3636 struct rtnl_link_stats64 *s)
c09440f7
SD		 3637{
3638 int cpu;
3639
3640 if (!dev->tstats)
bc1f4470 3641 return;
c09440f7
SD		 3642
3643 for_each_possible_cpu(cpu) {
3644 struct pcpu_sw_netstats *stats;
3645 struct pcpu_sw_netstats tmp;
3646 int start;
3647
3648 stats = per_cpu_ptr(dev->tstats, cpu);
3649 do {
3650 start = u64_stats_fetch_begin_irq(&stats->syncp);
3651 tmp.rx_packets = stats->rx_packets;
3652 tmp.rx_bytes = stats->rx_bytes;
3653 tmp.tx_packets = stats->tx_packets;
3654 tmp.tx_bytes = stats->tx_bytes;
3655 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
3656
3657 s->rx_packets += tmp.rx_packets;
3658 s->rx_bytes += tmp.rx_bytes;
3659 s->tx_packets += tmp.tx_packets;
3660 s->tx_bytes += tmp.tx_bytes;
3661 }
3662
3663 s->rx_dropped = dev->stats.rx_dropped;
3664 s->tx_dropped = dev->stats.tx_dropped;
c09440f7
SD		 3665}
3666
3667static int macsec_get_iflink(const struct net_device *dev)
3668{
3669 return macsec_priv(dev)->real_dev->ifindex;
3670}
3671
3672static const struct net_device_ops macsec_netdev_ops = {
3673 .ndo_init = macsec_dev_init,
3674 .ndo_uninit = macsec_dev_uninit,
3675 .ndo_open = macsec_dev_open,
3676 .ndo_stop = macsec_dev_stop,
3677 .ndo_fix_features = macsec_fix_features,
3678 .ndo_change_mtu = macsec_change_mtu,
3679 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3680 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3681 .ndo_set_mac_address = macsec_set_mac_address,
3682 .ndo_start_xmit = macsec_start_xmit,
3683 .ndo_get_stats64 = macsec_get_stats64,
3684 .ndo_get_iflink = macsec_get_iflink,
3685};
3686
3687static const struct device_type macsec_type = {
3688 .name = "macsec",
3689};
3690
3691static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3692 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
31d9a1c5 3693 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
c09440f7
SD		 3694 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3696 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3697 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3698 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3699 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3700 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3701 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3702 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3703 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3704 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3705};
3706
3707static void macsec_free_netdev(struct net_device *dev)
3708{
3709 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 3710
3711 free_percpu(macsec->stats);
3712 free_percpu(macsec->secy.tx_sc.stats);
3713
c09440f7
SD		 3714}
3715
3716static void macsec_setup(struct net_device *dev)
3717{
3718 ether_setup(dev);
91572088
JW		 3719 dev->min_mtu = 0;
3720 dev->max_mtu = ETH_MAX_MTU;
e425974f 3721 dev->priv_flags |= IFF_NO_QUEUE;
c09440f7 3722 dev->netdev_ops = &macsec_netdev_ops;
cf124db5
DM		 3723 dev->needs_free_netdev = true;
3724 dev->priv_destructor = macsec_free_netdev;
c24acf03 3725 SET_NETDEV_DEVTYPE(dev, &macsec_type);
c09440f7
SD		 3726
3727 eth_zero_addr(dev->broadcast);
3728}
3729
ccfdec90
FW		 3730static int macsec_changelink_common(struct net_device *dev,
3731 struct nlattr *data[])
c09440f7
SD		 3732{
3733 struct macsec_secy *secy;
3734 struct macsec_tx_sc *tx_sc;
3735
3736 secy = &macsec_priv(dev)->secy;
3737 tx_sc = &secy->tx_sc;
3738
3739 if (data[IFLA_MACSEC_ENCODING_SA]) {
3740 struct macsec_tx_sa *tx_sa;
3741
3742 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3743 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3744
3745 secy->operational = tx_sa && tx_sa->active;
3746 }
3747
3748 if (data[IFLA_MACSEC_WINDOW])
3749 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3750
3751 if (data[IFLA_MACSEC_ENCRYPT])
3752 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3753
3754 if (data[IFLA_MACSEC_PROTECT])
3755 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3756
3757 if (data[IFLA_MACSEC_INC_SCI])
3758 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3759
3760 if (data[IFLA_MACSEC_ES])
3761 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3762
3763 if (data[IFLA_MACSEC_SCB])
3764 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3765
3766 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3767 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3768
3769 if (data[IFLA_MACSEC_VALIDATION])
3770 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
ccfdec90
FW		 3771
3772 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3773 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3774 case MACSEC_CIPHER_ID_GCM_AES_128:
e8660ded 3775 case MACSEC_DEFAULT_CIPHER_ID:
ccfdec90 3776 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
48ef50fa 3777 secy->xpn = false;
ccfdec90
FW		 3778 break;
3779 case MACSEC_CIPHER_ID_GCM_AES_256:
3780 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
48ef50fa
EM		 3781 secy->xpn = false;
3782 break;
3783 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3784 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3785 secy->xpn = true;
3786 break;
3787 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3788 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3789 secy->xpn = true;
ccfdec90
FW		 3790 break;
3791 default:
3792 return -EINVAL;
3793 }
3794 }
3795
3796 return 0;
c09440f7
SD		 3797}
3798
3799static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
ad744b22
MS		 3800 struct nlattr *data[],
3801 struct netlink_ext_ack *extack)
c09440f7 3802{
3cf3227a
AT		 3803 struct macsec_dev *macsec = macsec_priv(dev);
3804 struct macsec_tx_sa tx_sc;
3805 struct macsec_secy secy;
3806 int ret;
3807
c09440f7
SD		 3808 if (!data)
3809 return 0;
3810
3811 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3812 data[IFLA_MACSEC_ICV_LEN] ||
3813 data[IFLA_MACSEC_SCI] ||
3814 data[IFLA_MACSEC_PORT])
3815 return -EINVAL;
3816
3cf3227a
AT		 3817 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3818 * propagation fails, to revert macsec_changelink_common.
3819 */
3820 memcpy(&secy, &macsec->secy, sizeof(secy));
3821 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3822
3823 ret = macsec_changelink_common(dev, data);
3824 if (ret)
3825 return ret;
3826
3827 /* If h/w offloading is available, propagate to the device */
3828 if (macsec_is_offloaded(macsec)) {
3829 const struct macsec_ops *ops;
3830 struct macsec_context ctx;
3831 int ret;
3832
3833 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3834 if (!ops) {
3835 ret = -EOPNOTSUPP;
3836 goto cleanup;
3837 }
3838
3839 ctx.secy = &macsec->secy;
3840 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3841 if (ret)
3842 goto cleanup;
3843 }
3844
3845 return 0;
3846
3847cleanup:
3848 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3849 memcpy(&macsec->secy, &secy, sizeof(secy));
3850
3851 return ret;
c09440f7
SD		 3852}
3853
3854static void macsec_del_dev(struct macsec_dev *macsec)
3855{
3856 int i;
3857
3858 while (macsec->secy.rx_sc) {
3859 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3860
3861 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3862 free_rx_sc(rx_sc);
3863 }
3864
3865 for (i = 0; i < MACSEC_NUM_AN; i++) {
3866 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3867
3868 if (sa) {
3869 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3870 clear_tx_sa(sa);
3871 }
3872 }
3873}
3874
bbe11fab
SD		 3875static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3876{
3877 struct macsec_dev *macsec = macsec_priv(dev);
e2003872 3878 struct net_device *real_dev = macsec->real_dev;
bbe11fab
SD		 3879
3880 unregister_netdevice_queue(dev, head);
3881 list_del_rcu(&macsec->secys);
3882 macsec_del_dev(macsec);
e2003872 3883 netdev_upper_dev_unlink(real_dev, dev);
bbe11fab
SD		 3884
3885 macsec_generation++;
3886}
3887
c09440f7
SD		 3888static void macsec_dellink(struct net_device *dev, struct list_head *head)
3889{
3890 struct macsec_dev *macsec = macsec_priv(dev);
3891 struct net_device *real_dev = macsec->real_dev;
3892 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3893
3cf3227a
AT		 3894 /* If h/w offloading is available, propagate to the device */
3895 if (macsec_is_offloaded(macsec)) {
3896 const struct macsec_ops *ops;
3897 struct macsec_context ctx;
3898
3899 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3900 if (ops) {
3901 ctx.secy = &macsec->secy;
3902 macsec_offload(ops->mdo_del_secy, &ctx);
3903 }
3904 }
3905
bbe11fab 3906 macsec_common_dellink(dev, head);
96cfc505 3907
960d5848 3908 if (list_empty(&rxd->secys)) {
c09440f7 3909 netdev_rx_handler_unregister(real_dev);
960d5848
SD		 3910 kfree(rxd);
3911 }
c09440f7
SD		 3912}
3913
3914static int register_macsec_dev(struct net_device *real_dev,
3915 struct net_device *dev)
3916{
3917 struct macsec_dev *macsec = macsec_priv(dev);
3918 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3919
3920 if (!rxd) {
3921 int err;
3922
3923 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3924 if (!rxd)
3925 return -ENOMEM;
3926
3927 INIT_LIST_HEAD(&rxd->secys);
3928
3929 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3930 rxd);
960d5848
SD		 3931 if (err < 0) {
3932 kfree(rxd);
c09440f7 3933 return err;
960d5848 3934 }
c09440f7
SD		 3935 }
3936
3937 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3938 return 0;
3939}
3940
3941static bool sci_exists(struct net_device *dev, sci_t sci)
3942{
3943 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3944 struct macsec_dev *macsec;
3945
3946 list_for_each_entry(macsec, &rxd->secys, secys) {
3947 if (macsec->secy.sci == sci)
3948 return true;
3949 }
3950
3951 return false;
3952}
3953
c09440f7
SD		 3954static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3955{
3956 struct macsec_dev *macsec = macsec_priv(dev);
3957 struct macsec_secy *secy = &macsec->secy;
3958
3959 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3960 if (!macsec->stats)
3961 return -ENOMEM;
3962
3963 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3964 if (!secy->tx_sc.stats) {
3965 free_percpu(macsec->stats);
3966 return -ENOMEM;
3967 }
3968
3969 if (sci == MACSEC_UNDEF_SCI)
3970 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3971
3972 secy->netdev = dev;
3973 secy->operational = true;
3974 secy->key_len = DEFAULT_SAK_LEN;
3975 secy->icv_len = icv_len;
3976 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3977 secy->protect_frames = true;
3978 secy->replay_protect = false;
48ef50fa 3979 secy->xpn = DEFAULT_XPN;
c09440f7
SD		 3980
3981 secy->sci = sci;
3982 secy->tx_sc.active = true;
3983 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3984 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3985 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3986 secy->tx_sc.end_station = false;
3987 secy->tx_sc.scb = false;
3988
3989 return 0;
3990}
3991
3992static int macsec_newlink(struct net *net, struct net_device *dev,
7a3f4a18
MS		 3993 struct nlattr *tb[], struct nlattr *data[],
3994 struct netlink_ext_ack *extack)
c09440f7
SD		 3995{
3996 struct macsec_dev *macsec = macsec_priv(dev);
3997 struct net_device *real_dev;
3998 int err;
3999 sci_t sci;
4000 u8 icv_len = DEFAULT_ICV_LEN;
4001 rx_handler_func_t *rx_handler;
4002
4003 if (!tb[IFLA_LINK])
4004 return -EINVAL;
4005 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4006 if (!real_dev)
4007 return -ENODEV;
b06d072c
WB		 4008 if (real_dev->type != ARPHRD_ETHER)
4009 return -EINVAL;
c09440f7
SD		 4010
4011 dev->priv_flags |= IFF_MACSEC;
4012
4013 macsec->real_dev = real_dev;
4014
3cf3227a
AT		 4015 /* MACsec offloading is off by default */
4016 macsec->offload = MACSEC_OFFLOAD_OFF;
4017
c09440f7
SD		 4018 if (data && data[IFLA_MACSEC_ICV_LEN])
4019 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4020 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4021
4022 rx_handler = rtnl_dereference(real_dev->rx_handler);
4023 if (rx_handler && rx_handler != macsec_handle_frame)
4024 return -EBUSY;
4025
4026 err = register_netdevice(dev);
4027 if (err < 0)
4028 return err;
4029
42ab19ee 4030 err = netdev_upper_dev_link(real_dev, dev, extack);
e2003872 4031 if (err < 0)
bd28899d 4032 goto unregister;
e2003872 4033
c09440f7
SD		 4034 /* need to be already registered so that ->init has run and
4035 * the MAC addr is set
4036 */
4037 if (data && data[IFLA_MACSEC_SCI])
4038 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4039 else if (data && data[IFLA_MACSEC_PORT])
4040 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4041 else
4042 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4043
4044 if (rx_handler && sci_exists(real_dev, sci)) {
4045 err = -EBUSY;
e2003872 4046 goto unlink;
c09440f7
SD		 4047 }
4048
4049 err = macsec_add_dev(dev, sci, icv_len);
4050 if (err)
e2003872 4051 goto unlink;
c09440f7 4052
ccfdec90
FW		 4053 if (data) {
4054 err = macsec_changelink_common(dev, data);
4055 if (err)
4056 goto del_dev;
4057 }
c09440f7
SD		 4058
4059 err = register_macsec_dev(real_dev, dev);
4060 if (err < 0)
4061 goto del_dev;
4062
e6ac0758
SD		 4063 netif_stacked_transfer_operstate(real_dev, dev);
4064 linkwatch_fire_event(dev);
4065
96cfc505
SD		 4066 macsec_generation++;
4067
c09440f7
SD		 4068 return 0;
4069
4070del_dev:
4071 macsec_del_dev(macsec);
e2003872
SD		 4072unlink:
4073 netdev_upper_dev_unlink(real_dev, dev);
bd28899d 4074unregister:
c09440f7
SD		 4075 unregister_netdevice(dev);
4076 return err;
4077}
4078
a8b8a889
MS		 4079static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4080 struct netlink_ext_ack *extack)
c09440f7 4081{
74816480 4082 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
c09440f7
SD		 4083 u8 icv_len = DEFAULT_ICV_LEN;
4084 int flag;
4085 bool es, scb, sci;
4086
4087 if (!data)
4088 return 0;
4089
4090 if (data[IFLA_MACSEC_CIPHER_SUITE])
4091 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4092
f04c392d 4093 if (data[IFLA_MACSEC_ICV_LEN]) {
c09440f7 4094 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
f04c392d
DC		 4095 if (icv_len != DEFAULT_ICV_LEN) {
4096 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4097 struct crypto_aead *dummy_tfm;
4098
4099 dummy_tfm = macsec_alloc_tfm(dummy_key,
4100 DEFAULT_SAK_LEN,
4101 icv_len);
4102 if (IS_ERR(dummy_tfm))
4103 return PTR_ERR(dummy_tfm);
4104 crypto_free_aead(dummy_tfm);
4105 }
4106 }
c09440f7
SD		 4107
4108 switch (csid) {
ccfdec90
FW		 4109 case MACSEC_CIPHER_ID_GCM_AES_128:
4110 case MACSEC_CIPHER_ID_GCM_AES_256:
48ef50fa
EM		 4111 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4112 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
e8660ded 4113 case MACSEC_DEFAULT_CIPHER_ID:
c09440f7 4114 if (icv_len < MACSEC_MIN_ICV_LEN ||
2ccbe2cb 4115 icv_len > MACSEC_STD_ICV_LEN)
c09440f7
SD		 4116 return -EINVAL;
4117 break;
4118 default:
4119 return -EINVAL;
4120 }
4121
4122 if (data[IFLA_MACSEC_ENCODING_SA]) {
4123 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4124 return -EINVAL;
4125 }
4126
4127 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4128 flag < IFLA_MACSEC_VALIDATION;
4129 flag++) {
4130 if (data[flag]) {
4131 if (nla_get_u8(data[flag]) > 1)
4132 return -EINVAL;
4133 }
4134 }
4135
4136 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4137 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4138 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4139
4140 if ((sci && (scb || es)) || (scb && es))
4141 return -EINVAL;
4142
4143 if (data[IFLA_MACSEC_VALIDATION] &&
4144 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4145 return -EINVAL;
4146
4b1fb935
SD		 4147 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4148 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
c09440f7
SD		 4149 !data[IFLA_MACSEC_WINDOW])
4150 return -EINVAL;
4151
4152 return 0;
4153}
4154
4155static struct net *macsec_get_link_net(const struct net_device *dev)
4156{
4157 return dev_net(macsec_priv(dev)->real_dev);
4158}
4159
4160static size_t macsec_get_size(const struct net_device *dev)
4161{
c9fba3ed
ZS		 4162 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4163 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4164 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4165 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4166 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4167 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4168 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4169 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4170 nla_total_size(1) + /* IFLA_MACSEC_ES */
4171 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4172 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4173 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
c09440f7
SD		 4174 0;
4175}
4176
4177static int macsec_fill_info(struct sk_buff *skb,
4178 const struct net_device *dev)
4179{
4180 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4181 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ccfdec90
FW		 4182 u64 csid;
4183
4184 switch (secy->key_len) {
4185 case MACSEC_GCM_AES_128_SAK_LEN:
48ef50fa 4186 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 4187 break;
4188 case MACSEC_GCM_AES_256_SAK_LEN:
48ef50fa 4189 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
ccfdec90
FW		 4190 break;
4191 default:
4192 goto nla_put_failure;
4193 }
c09440f7 4194
f60d94c0
ND		 4195 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4196 IFLA_MACSEC_PAD) ||
c09440f7 4197 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
f60d94c0 4198 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
ccfdec90 4199 csid, IFLA_MACSEC_PAD) ||
c09440f7
SD		 4200 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4201 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4202 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4203 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4204 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4205 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4206 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4207 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4208 0)
4209 goto nla_put_failure;
4210
4211 if (secy->replay_protect) {
4212 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4213 goto nla_put_failure;
4214 }
4215
4216 return 0;
4217
4218nla_put_failure:
4219 return -EMSGSIZE;
4220}
4221
4222static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4223 .kind = "macsec",
4224 .priv_size = sizeof(struct macsec_dev),
4225 .maxtype = IFLA_MACSEC_MAX,
4226 .policy = macsec_rtnl_policy,
4227 .setup = macsec_setup,
4228 .validate = macsec_validate_attr,
4229 .newlink = macsec_newlink,
4230 .changelink = macsec_changelink,
4231 .dellink = macsec_dellink,
4232 .get_size = macsec_get_size,
4233 .fill_info = macsec_fill_info,
4234 .get_link_net = macsec_get_link_net,
4235};
4236
4237static bool is_macsec_master(struct net_device *dev)
4238{
4239 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4240}
4241
4242static int macsec_notify(struct notifier_block *this, unsigned long event,
4243 void *ptr)
4244{
4245 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4246 LIST_HEAD(head);
4247
4248 if (!is_macsec_master(real_dev))
4249 return NOTIFY_DONE;
4250
4251 switch (event) {
e6ac0758
SD		 4252 case NETDEV_DOWN:
4253 case NETDEV_UP:
4254 case NETDEV_CHANGE: {
4255 struct macsec_dev *m, *n;
4256 struct macsec_rxh_data *rxd;
4257
4258 rxd = macsec_data_rtnl(real_dev);
4259 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4260 struct net_device *dev = m->secy.netdev;
4261
4262 netif_stacked_transfer_operstate(real_dev, dev);
4263 }
4264 break;
4265 }
c09440f7
SD		 4266 case NETDEV_UNREGISTER: {
4267 struct macsec_dev *m, *n;
4268 struct macsec_rxh_data *rxd;
4269
4270 rxd = macsec_data_rtnl(real_dev);
4271 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
bbe11fab 4272 macsec_common_dellink(m->secy.netdev, &head);
c09440f7 4273 }
bbe11fab
SD		 4274
4275 netdev_rx_handler_unregister(real_dev);
4276 kfree(rxd);
4277
c09440f7
SD		 4278 unregister_netdevice_many(&head);
4279 break;
4280 }
4281 case NETDEV_CHANGEMTU: {
4282 struct macsec_dev *m;
4283 struct macsec_rxh_data *rxd;
4284
4285 rxd = macsec_data_rtnl(real_dev);
4286 list_for_each_entry(m, &rxd->secys, secys) {
4287 struct net_device *dev = m->secy.netdev;
4288 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4289 macsec_extra_len(true));
4290
4291 if (dev->mtu > mtu)
4292 dev_set_mtu(dev, mtu);
4293 }
4294 }
4295 }
4296
4297 return NOTIFY_OK;
4298}
4299
4300static struct notifier_block macsec_notifier = {
4301 .notifier_call = macsec_notify,
4302};
4303
4304static int __init macsec_init(void)
4305{
4306 int err;
4307
4308 pr_info("MACsec IEEE 802.1AE\n");
4309 err = register_netdevice_notifier(&macsec_notifier);
4310 if (err)
4311 return err;
4312
4313 err = rtnl_link_register(&macsec_link_ops);
4314 if (err)
4315 goto notifier;
4316
489111e5 4317 err = genl_register_family(&macsec_fam);
c09440f7
SD		 4318 if (err)
4319 goto rtnl;
4320
4321 return 0;
4322
4323rtnl:
4324 rtnl_link_unregister(&macsec_link_ops);
4325notifier:
4326 unregister_netdevice_notifier(&macsec_notifier);
4327 return err;
4328}
4329
4330static void __exit macsec_exit(void)
4331{
4332 genl_unregister_family(&macsec_fam);
4333 rtnl_link_unregister(&macsec_link_ops);
4334 unregister_netdevice_notifier(&macsec_notifier);
b196c22a 4335 rcu_barrier();
c09440f7
SD		 4336}
4337
4338module_init(macsec_init);
4339module_exit(macsec_exit);
4340
4341MODULE_ALIAS_RTNL_LINK("macsec");
78362998 4342MODULE_ALIAS_GENL_FAMILY("macsec");
c09440f7
SD		 4343
4344MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4345MODULE_LICENSE("GPL v2");
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