projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Revert "net: macsec: report real_dev features when HW offloading is enabled"
[linux-block.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>
0a28bfd4 21#include <net/dst_metadata.h>
3cf3227a 22#include <linux/phy.h>
a21ecf0e 23#include <linux/byteorder/generic.h>
b06d072c 24#include <linux/if_arp.h>
c09440f7
SD		 25
26#include <uapi/linux/if_macsec.h>
27
c09440f7
SD		 28/* SecTAG length = macsec_eth_header without the optional SCI */
29#define MACSEC_TAG_LEN 6
30
31struct macsec_eth_header {
32 struct ethhdr eth;
33 /* SecTAG */
34 u8 tci_an;
35#if defined(__LITTLE_ENDIAN_BITFIELD)
36 u8 short_length:6,
37 unused:2;
38#elif defined(__BIG_ENDIAN_BITFIELD)
39 u8 unused:2,
40 short_length:6;
41#else
42#error "Please fix <asm/byteorder.h>"
43#endif
44 __be32 packet_number;
45 u8 secure_channel_id[8]; /* optional */
46} __packed;
47
c09440f7
SD		 48/* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
49#define MIN_NON_SHORT_LEN 48
50
51#define GCM_AES_IV_LEN 12
c09440f7 52
7979472b 53#define for_each_rxsc(secy, sc) \
c09440f7 54 for (sc = rcu_dereference_bh(secy->rx_sc); \
7979472b 55 sc; \
c09440f7
SD		 56 sc = rcu_dereference_bh(sc->next))
57#define for_each_rxsc_rtnl(secy, sc) \
58 for (sc = rtnl_dereference(secy->rx_sc); \
59 sc; \
60 sc = rtnl_dereference(sc->next))
61
a21ecf0e
EM		 62#define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
63
64struct gcm_iv_xpn {
65 union {
66 u8 short_secure_channel_id[4];
67 ssci_t ssci;
68 };
69 __be64 pn;
70} __packed;
71
c09440f7
SD		 72struct gcm_iv {
73 union {
74 u8 secure_channel_id[8];
75 sci_t sci;
76 };
77 __be32 pn;
78};
79
c09440f7
SD		 80#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
81
c09440f7
SD		 82struct pcpu_secy_stats {
83 struct macsec_dev_stats stats;
84 struct u64_stats_sync syncp;
85};
86
87/**
88 * struct macsec_dev - private data
89 * @secy: SecY config
90 * @real_dev: pointer to underlying netdevice
196a888c 91 * @dev_tracker: refcount tracker for @real_dev reference
c09440f7
SD		 92 * @stats: MACsec device stats
93 * @secys: linked list of SecY's on the underlying device
ecdc5689 94 * @gro_cells: pointer to the Generic Receive Offload cell
3cf3227a 95 * @offload: status of offloading on the MACsec device
c09440f7
SD		 96 */
97struct macsec_dev {
98 struct macsec_secy secy;
99 struct net_device *real_dev;
196a888c 100 netdevice_tracker dev_tracker;
c09440f7
SD		 101 struct pcpu_secy_stats __percpu *stats;
102 struct list_head secys;
5491e7c6 103 struct gro_cells gro_cells;
3cf3227a 104 enum macsec_offload offload;
c09440f7
SD		 105};
106
107/**
108 * struct macsec_rxh_data - rx_handler private argument
109 * @secys: linked list of SecY's on this underlying device
110 */
111struct macsec_rxh_data {
112 struct list_head secys;
113};
114
115static struct macsec_dev *macsec_priv(const struct net_device *dev)
116{
117 return (struct macsec_dev *)netdev_priv(dev);
118}
119
120static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
121{
122 return rcu_dereference_bh(dev->rx_handler_data);
123}
124
125static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
126{
127 return rtnl_dereference(dev->rx_handler_data);
128}
129
130struct macsec_cb {
131 struct aead_request *req;
132 union {
133 struct macsec_tx_sa *tx_sa;
134 struct macsec_rx_sa *rx_sa;
135 };
136 u8 assoc_num;
137 bool valid;
138 bool has_sci;
139};
140
141static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
142{
143 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
144
145 if (!sa || !sa->active)
146 return NULL;
147
e187246f 148 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 149 return NULL;
150
151 return sa;
152}
153
91ec9bd5
CY		 154static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc)
155{
156 struct macsec_rx_sa *sa = NULL;
157 int an;
158
159 for (an = 0; an < MACSEC_NUM_AN; an++) {
160 sa = macsec_rxsa_get(rx_sc->sa[an]);
161 if (sa)
162 break;
163 }
164 return sa;
165}
166
c09440f7
SD		 167static void free_rx_sc_rcu(struct rcu_head *head)
168{
169 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
170
171 free_percpu(rx_sc->stats);
172 kfree(rx_sc);
173}
174
175static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
176{
8676d76f 177 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
c09440f7
SD		 178}
179
180static void macsec_rxsc_put(struct macsec_rx_sc *sc)
181{
8676d76f 182 if (refcount_dec_and_test(&sc->refcnt))
c09440f7
SD		 183 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
184}
185
186static void free_rxsa(struct rcu_head *head)
187{
188 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
189
190 crypto_free_aead(sa->key.tfm);
191 free_percpu(sa->stats);
c09440f7
SD		 192 kfree(sa);
193}
194
195static void macsec_rxsa_put(struct macsec_rx_sa *sa)
196{
e187246f 197 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 198 call_rcu(&sa->rcu, free_rxsa);
199}
200
201static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
202{
203 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
204
205 if (!sa || !sa->active)
206 return NULL;
207
28206cdb 208 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 209 return NULL;
210
211 return sa;
212}
213
214static void free_txsa(struct rcu_head *head)
215{
216 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
217
218 crypto_free_aead(sa->key.tfm);
219 free_percpu(sa->stats);
220 kfree(sa);
221}
222
223static void macsec_txsa_put(struct macsec_tx_sa *sa)
224{
28206cdb 225 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 226 call_rcu(&sa->rcu, free_txsa);
227}
228
229static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
230{
231 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
232 return (struct macsec_cb *)skb->cb;
233}
234
c09440f7
SD		 235#define MACSEC_PORT_SCB (0x0000)
236#define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
48ef50fa 237#define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
c09440f7 238
ccfdec90
FW		 239#define MACSEC_GCM_AES_128_SAK_LEN 16
240#define MACSEC_GCM_AES_256_SAK_LEN 32
241
ccfdec90 242#define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
48ef50fa 243#define DEFAULT_XPN false
c09440f7
SD		 244#define DEFAULT_SEND_SCI true
245#define DEFAULT_ENCRYPT false
246#define DEFAULT_ENCODING_SA 0
b07a0e20 247#define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1))
c09440f7 248
8bc7823e 249static sci_t make_sci(const u8 *addr, __be16 port)
c09440f7
SD		 250{
251 sci_t sci;
252
253 memcpy(&sci, addr, ETH_ALEN);
254 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
255
256 return sci;
257}
258
259static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
260{
261 sci_t sci;
262
263 if (sci_present)
264 memcpy(&sci, hdr->secure_channel_id,
265 sizeof(hdr->secure_channel_id));
266 else
267 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
268
269 return sci;
270}
271
272static unsigned int macsec_sectag_len(bool sci_present)
273{
274 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
275}
276
277static unsigned int macsec_hdr_len(bool sci_present)
278{
279 return macsec_sectag_len(sci_present) + ETH_HLEN;
280}
281
282static unsigned int macsec_extra_len(bool sci_present)
283{
284 return macsec_sectag_len(sci_present) + sizeof(__be16);
285}
286
287/* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
288static void macsec_fill_sectag(struct macsec_eth_header *h,
e0f841f5
TB		 289 const struct macsec_secy *secy, u32 pn,
290 bool sci_present)
c09440f7
SD		 291{
292 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
293
e0f841f5 294 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
c09440f7
SD		 295 h->eth.h_proto = htons(ETH_P_MACSEC);
296
e0f841f5 297 if (sci_present) {
c09440f7
SD		 298 h->tci_an |= MACSEC_TCI_SC;
299 memcpy(&h->secure_channel_id, &secy->sci,
300 sizeof(h->secure_channel_id));
301 } else {
302 if (tx_sc->end_station)
303 h->tci_an |= MACSEC_TCI_ES;
304 if (tx_sc->scb)
305 h->tci_an |= MACSEC_TCI_SCB;
306 }
307
308 h->packet_number = htonl(pn);
309
310 /* with GCM, C/E clear for !encrypt, both set for encrypt */
311 if (tx_sc->encrypt)
312 h->tci_an |= MACSEC_TCI_CONFID;
b1671253 313 else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN)
c09440f7
SD		 314 h->tci_an |= MACSEC_TCI_C;
315
316 h->tci_an |= tx_sc->encoding_sa;
317}
318
319static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
320{
321 if (data_len < MIN_NON_SHORT_LEN)
322 h->short_length = data_len;
323}
324
3cf3227a
AT		 325/* Checks if a MACsec interface is being offloaded to an hardware engine */
326static bool macsec_is_offloaded(struct macsec_dev *macsec)
327{
21114b7f
AT		 328 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
329 macsec->offload == MACSEC_OFFLOAD_PHY)
3cf3227a
AT		 330 return true;
331
332 return false;
333}
334
335/* Checks if underlying layers implement MACsec offloading functions. */
336static bool macsec_check_offload(enum macsec_offload offload,
337 struct macsec_dev *macsec)
338{
339 if (!macsec || !macsec->real_dev)
340 return false;
341
342 if (offload == MACSEC_OFFLOAD_PHY)
343 return macsec->real_dev->phydev &&
344 macsec->real_dev->phydev->macsec_ops;
21114b7f
AT		 345 else if (offload == MACSEC_OFFLOAD_MAC)
346 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
347 macsec->real_dev->macsec_ops;
3cf3227a
AT		 348
349 return false;
350}
351
352static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
353 struct macsec_dev *macsec,
354 struct macsec_context *ctx)
355{
356 if (ctx) {
357 memset(ctx, 0, sizeof(*ctx));
358 ctx->offload = offload;
359
360 if (offload == MACSEC_OFFLOAD_PHY)
361 ctx->phydev = macsec->real_dev->phydev;
21114b7f
AT		 362 else if (offload == MACSEC_OFFLOAD_MAC)
363 ctx->netdev = macsec->real_dev;
3cf3227a
AT		 364 }
365
21114b7f
AT		 366 if (offload == MACSEC_OFFLOAD_PHY)
367 return macsec->real_dev->phydev->macsec_ops;
368 else
369 return macsec->real_dev->macsec_ops;
3cf3227a
AT		 370}
371
372/* Returns a pointer to the MACsec ops struct if any and updates the MACsec
373 * context device reference if provided.
374 */
375static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
376 struct macsec_context *ctx)
377{
378 if (!macsec_check_offload(macsec->offload, macsec))
379 return NULL;
380
381 return __macsec_get_ops(macsec->offload, macsec, ctx);
382}
383
a21ecf0e
EM		 384/* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
385static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
c09440f7
SD		 386{
387 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
388 int len = skb->len - 2 * ETH_ALEN;
389 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
390
391 /* a) It comprises at least 17 octets */
392 if (skb->len <= 16)
393 return false;
394
395 /* b) MACsec EtherType: already checked */
396
397 /* c) V bit is clear */
398 if (h->tci_an & MACSEC_TCI_VERSION)
399 return false;
400
401 /* d) ES or SCB => !SC */
402 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
403 (h->tci_an & MACSEC_TCI_SC))
404 return false;
405
406 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
407 if (h->unused)
408 return false;
409
a21ecf0e
EM		 410 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
411 if (!h->packet_number && !xpn)
c09440f7
SD		 412 return false;
413
414 /* length check, f) g) h) i) */
415 if (h->short_length)
416 return len == extra_len + h->short_length;
417 return len >= extra_len + MIN_NON_SHORT_LEN;
418}
419
420#define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
2ccbe2cb 421#define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
c09440f7 422
a21ecf0e
EM		 423static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
424 salt_t salt)
425{
426 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
427
428 gcm_iv->ssci = ssci ^ salt.ssci;
429 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
430}
431
c09440f7
SD		 432static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
433{
434 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
435
436 gcm_iv->sci = sci;
437 gcm_iv->pn = htonl(pn);
438}
439
440static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
441{
442 return (struct macsec_eth_header *)skb_mac_header(skb);
443}
444
5c937de7
AT		 445static void __macsec_pn_wrapped(struct macsec_secy *secy,
446 struct macsec_tx_sa *tx_sa)
447{
448 pr_debug("PN wrapped, transitioning to !oper\n");
449 tx_sa->active = false;
450 if (secy->protect_frames)
451 secy->operational = false;
452}
453
454void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
455{
456 spin_lock_bh(&tx_sa->lock);
457 __macsec_pn_wrapped(secy, tx_sa);
458 spin_unlock_bh(&tx_sa->lock);
459}
460EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
461
a21ecf0e
EM		 462static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
463 struct macsec_secy *secy)
c09440f7 464{
a21ecf0e 465 pn_t pn;
c09440f7
SD		 466
467 spin_lock_bh(&tx_sa->lock);
c09440f7 468
a21ecf0e
EM		 469 pn = tx_sa->next_pn_halves;
470 if (secy->xpn)
471 tx_sa->next_pn++;
472 else
473 tx_sa->next_pn_halves.lower++;
474
5c937de7
AT		 475 if (tx_sa->next_pn == 0)
476 __macsec_pn_wrapped(secy, tx_sa);
c09440f7
SD		 477 spin_unlock_bh(&tx_sa->lock);
478
479 return pn;
480}
481
482static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
483{
484 struct macsec_dev *macsec = netdev_priv(dev);
485
486 skb->dev = macsec->real_dev;
487 skb_reset_mac_header(skb);
488 skb->protocol = eth_hdr(skb)->h_proto;
489}
490
91ec9bd5
CY		 491static unsigned int macsec_msdu_len(struct sk_buff *skb)
492{
493 struct macsec_dev *macsec = macsec_priv(skb->dev);
494 struct macsec_secy *secy = &macsec->secy;
495 bool sci_present = macsec_skb_cb(skb)->has_sci;
496
497 return skb->len - macsec_hdr_len(sci_present) - secy->icv_len;
498}
499
c09440f7
SD		 500static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
501 struct macsec_tx_sa *tx_sa)
502{
91ec9bd5 503 unsigned int msdu_len = macsec_msdu_len(skb);
c09440f7
SD		 504 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
505
506 u64_stats_update_begin(&txsc_stats->syncp);
507 if (tx_sc->encrypt) {
91ec9bd5 508 txsc_stats->stats.OutOctetsEncrypted += msdu_len;
c09440f7
SD		 509 txsc_stats->stats.OutPktsEncrypted++;
510 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
511 } else {
91ec9bd5 512 txsc_stats->stats.OutOctetsProtected += msdu_len;
c09440f7
SD		 513 txsc_stats->stats.OutPktsProtected++;
514 this_cpu_inc(tx_sa->stats->OutPktsProtected);
515 }
516 u64_stats_update_end(&txsc_stats->syncp);
517}
518
519static void count_tx(struct net_device *dev, int ret, int len)
520{
521 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
522 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
523
524 u64_stats_update_begin(&stats->syncp);
9962acef
ED		 525 u64_stats_inc(&stats->tx_packets);
526 u64_stats_add(&stats->tx_bytes, len);
c09440f7 527 u64_stats_update_end(&stats->syncp);
c09440f7
SD		 528 }
529}
530
531static void macsec_encrypt_done(struct crypto_async_request *base, int err)
532{
533 struct sk_buff *skb = base->data;
534 struct net_device *dev = skb->dev;
535 struct macsec_dev *macsec = macsec_priv(dev);
536 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
537 int len, ret;
538
539 aead_request_free(macsec_skb_cb(skb)->req);
540
541 rcu_read_lock_bh();
c09440f7 542 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
91ec9bd5
CY		 543 /* packet is encrypted/protected so tx_bytes must be calculated */
544 len = macsec_msdu_len(skb) + 2 * ETH_ALEN;
545 macsec_encrypt_finish(skb, dev);
c09440f7
SD		 546 ret = dev_queue_xmit(skb);
547 count_tx(dev, ret, len);
548 rcu_read_unlock_bh();
549
550 macsec_txsa_put(sa);
551 dev_put(dev);
552}
553
5d9649b3
SD		 554static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
555 unsigned char **iv,
5294b830
JD		 556 struct scatterlist **sg,
557 int num_frags)
5d9649b3
SD		 558{
559 size_t size, iv_offset, sg_offset;
560 struct aead_request *req;
561 void *tmp;
562
563 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
564 iv_offset = size;
565 size += GCM_AES_IV_LEN;
566
567 size = ALIGN(size, __alignof__(struct scatterlist));
568 sg_offset = size;
5294b830 569 size += sizeof(struct scatterlist) * num_frags;
5d9649b3
SD		 570
571 tmp = kmalloc(size, GFP_ATOMIC);
572 if (!tmp)
573 return NULL;
574
575 *iv = (unsigned char *)(tmp + iv_offset);
576 *sg = (struct scatterlist *)(tmp + sg_offset);
577 req = tmp;
578
579 aead_request_set_tfm(req, tfm);
580
581 return req;
582}
583
c09440f7
SD		 584static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
585 struct net_device *dev)
586{
587 int ret;
5d9649b3 588 struct scatterlist *sg;
5294b830 589 struct sk_buff *trailer;
5d9649b3 590 unsigned char *iv;
c09440f7
SD		 591 struct ethhdr *eth;
592 struct macsec_eth_header *hh;
593 size_t unprotected_len;
594 struct aead_request *req;
595 struct macsec_secy *secy;
596 struct macsec_tx_sc *tx_sc;
597 struct macsec_tx_sa *tx_sa;
598 struct macsec_dev *macsec = macsec_priv(dev);
e0f841f5 599 bool sci_present;
a21ecf0e 600 pn_t pn;
c09440f7
SD		 601
602 secy = &macsec->secy;
603 tx_sc = &secy->tx_sc;
604
605 /* 10.5.1 TX SA assignment */
606 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
607 if (!tx_sa) {
608 secy->operational = false;
609 kfree_skb(skb);
610 return ERR_PTR(-EINVAL);
611 }
612
613 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
614 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
615 struct sk_buff *nskb = skb_copy_expand(skb,
616 MACSEC_NEEDED_HEADROOM,
617 MACSEC_NEEDED_TAILROOM,
618 GFP_ATOMIC);
619 if (likely(nskb)) {
620 consume_skb(skb);
621 skb = nskb;
622 } else {
623 macsec_txsa_put(tx_sa);
624 kfree_skb(skb);
625 return ERR_PTR(-ENOMEM);
626 }
627 } else {
628 skb = skb_unshare(skb, GFP_ATOMIC);
629 if (!skb) {
630 macsec_txsa_put(tx_sa);
631 return ERR_PTR(-ENOMEM);
632 }
633 }
634
635 unprotected_len = skb->len;
636 eth = eth_hdr(skb);
b1671253 637 sci_present = macsec_send_sci(secy);
d58ff351 638 hh = skb_push(skb, macsec_extra_len(sci_present));
c09440f7
SD		 639 memmove(hh, eth, 2 * ETH_ALEN);
640
641 pn = tx_sa_update_pn(tx_sa, secy);
a21ecf0e 642 if (pn.full64 == 0) {
c09440f7
SD		 643 macsec_txsa_put(tx_sa);
644 kfree_skb(skb);
645 return ERR_PTR(-ENOLINK);
646 }
a21ecf0e 647 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
c09440f7
SD		 648 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
649
c09440f7
SD		 650 skb_put(skb, secy->icv_len);
651
652 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
653 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
654
655 u64_stats_update_begin(&secy_stats->syncp);
656 secy_stats->stats.OutPktsTooLong++;
657 u64_stats_update_end(&secy_stats->syncp);
658
659 macsec_txsa_put(tx_sa);
660 kfree_skb(skb);
661 return ERR_PTR(-EINVAL);
662 }
663
5294b830
JD		 664 ret = skb_cow_data(skb, 0, &trailer);
665 if (unlikely(ret < 0)) {
666 macsec_txsa_put(tx_sa);
667 kfree_skb(skb);
668 return ERR_PTR(ret);
669 }
670
671 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 672 if (!req) {
673 macsec_txsa_put(tx_sa);
674 kfree_skb(skb);
675 return ERR_PTR(-ENOMEM);
676 }
677
a21ecf0e
EM		 678 if (secy->xpn)
679 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
680 else
681 macsec_fill_iv(iv, secy->sci, pn.lower);
5d9649b3 682
5294b830 683 sg_init_table(sg, ret);
cda7ea69
JD		 684 ret = skb_to_sgvec(skb, sg, 0, skb->len);
685 if (unlikely(ret < 0)) {
5aba2ba5 686 aead_request_free(req);
cda7ea69
JD		 687 macsec_txsa_put(tx_sa);
688 kfree_skb(skb);
689 return ERR_PTR(ret);
690 }
c09440f7
SD		 691
692 if (tx_sc->encrypt) {
e0f841f5 693 int len = skb->len - macsec_hdr_len(sci_present) -
c09440f7
SD		 694 secy->icv_len;
695 aead_request_set_crypt(req, sg, sg, len, iv);
e0f841f5 696 aead_request_set_ad(req, macsec_hdr_len(sci_present));
c09440f7
SD		 697 } else {
698 aead_request_set_crypt(req, sg, sg, 0, iv);
699 aead_request_set_ad(req, skb->len - secy->icv_len);
700 }
701
702 macsec_skb_cb(skb)->req = req;
703 macsec_skb_cb(skb)->tx_sa = tx_sa;
91ec9bd5 704 macsec_skb_cb(skb)->has_sci = sci_present;
c09440f7
SD		 705 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
706
707 dev_hold(skb->dev);
708 ret = crypto_aead_encrypt(req);
709 if (ret == -EINPROGRESS) {
710 return ERR_PTR(ret);
711 } else if (ret != 0) {
712 dev_put(skb->dev);
713 kfree_skb(skb);
714 aead_request_free(req);
715 macsec_txsa_put(tx_sa);
716 return ERR_PTR(-EINVAL);
717 }
718
719 dev_put(skb->dev);
720 aead_request_free(req);
721 macsec_txsa_put(tx_sa);
722
723 return skb;
724}
725
726static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
727{
728 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
729 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
730 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
731 u32 lowest_pn = 0;
732
733 spin_lock(&rx_sa->lock);
a21ecf0e
EM		 734 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
735 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
c09440f7
SD		 736
737 /* Now perform replay protection check again
738 * (see IEEE 802.1AE-2006 figure 10-5)
739 */
a21ecf0e
EM		 740 if (secy->replay_protect && pn < lowest_pn &&
741 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
c09440f7
SD		 742 spin_unlock(&rx_sa->lock);
743 u64_stats_update_begin(&rxsc_stats->syncp);
744 rxsc_stats->stats.InPktsLate++;
745 u64_stats_update_end(&rxsc_stats->syncp);
91ec9bd5 746 secy->netdev->stats.rx_dropped++;
c09440f7
SD		 747 return false;
748 }
749
750 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
91ec9bd5 751 unsigned int msdu_len = macsec_msdu_len(skb);
c09440f7
SD		 752 u64_stats_update_begin(&rxsc_stats->syncp);
753 if (hdr->tci_an & MACSEC_TCI_E)
91ec9bd5 754 rxsc_stats->stats.InOctetsDecrypted += msdu_len;
c09440f7 755 else
91ec9bd5 756 rxsc_stats->stats.InOctetsValidated += msdu_len;
c09440f7
SD		 757 u64_stats_update_end(&rxsc_stats->syncp);
758 }
759
760 if (!macsec_skb_cb(skb)->valid) {
761 spin_unlock(&rx_sa->lock);
762
763 /* 10.6.5 */
764 if (hdr->tci_an & MACSEC_TCI_C ||
765 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
766 u64_stats_update_begin(&rxsc_stats->syncp);
767 rxsc_stats->stats.InPktsNotValid++;
768 u64_stats_update_end(&rxsc_stats->syncp);
91ec9bd5
CY		 769 this_cpu_inc(rx_sa->stats->InPktsNotValid);
770 secy->netdev->stats.rx_errors++;
c09440f7
SD		 771 return false;
772 }
773
774 u64_stats_update_begin(&rxsc_stats->syncp);
775 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
776 rxsc_stats->stats.InPktsInvalid++;
777 this_cpu_inc(rx_sa->stats->InPktsInvalid);
778 } else if (pn < lowest_pn) {
779 rxsc_stats->stats.InPktsDelayed++;
780 } else {
781 rxsc_stats->stats.InPktsUnchecked++;
782 }
783 u64_stats_update_end(&rxsc_stats->syncp);
784 } else {
785 u64_stats_update_begin(&rxsc_stats->syncp);
786 if (pn < lowest_pn) {
787 rxsc_stats->stats.InPktsDelayed++;
788 } else {
789 rxsc_stats->stats.InPktsOK++;
790 this_cpu_inc(rx_sa->stats->InPktsOK);
791 }
792 u64_stats_update_end(&rxsc_stats->syncp);
793
a21ecf0e
EM		 794 // Instead of "pn >=" - to support pn overflow in xpn
795 if (pn + 1 > rx_sa->next_pn_halves.lower) {
796 rx_sa->next_pn_halves.lower = pn + 1;
797 } else if (secy->xpn &&
798 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
799 rx_sa->next_pn_halves.upper++;
800 rx_sa->next_pn_halves.lower = pn + 1;
801 }
802
c09440f7
SD		 803 spin_unlock(&rx_sa->lock);
804 }
805
806 return true;
807}
808
809static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
810{
811 skb->pkt_type = PACKET_HOST;
812 skb->protocol = eth_type_trans(skb, dev);
813
814 skb_reset_network_header(skb);
815 if (!skb_transport_header_was_set(skb))
816 skb_reset_transport_header(skb);
817 skb_reset_mac_len(skb);
818}
819
820static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
821{
7d8b16b9 822 skb->ip_summed = CHECKSUM_NONE;
c09440f7
SD		 823 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
824 skb_pull(skb, hdr_len);
825 pskb_trim_unique(skb, skb->len - icv_len);
826}
827
828static void count_rx(struct net_device *dev, int len)
829{
830 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
831
832 u64_stats_update_begin(&stats->syncp);
9962acef
ED		 833 u64_stats_inc(&stats->rx_packets);
834 u64_stats_add(&stats->rx_bytes, len);
c09440f7
SD		 835 u64_stats_update_end(&stats->syncp);
836}
837
838static void macsec_decrypt_done(struct crypto_async_request *base, int err)
839{
840 struct sk_buff *skb = base->data;
841 struct net_device *dev = skb->dev;
842 struct macsec_dev *macsec = macsec_priv(dev);
843 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
c78ebe1d 844 struct macsec_rx_sc *rx_sc = rx_sa->sc;
863483c9 845 int len;
c09440f7
SD		 846 u32 pn;
847
848 aead_request_free(macsec_skb_cb(skb)->req);
849
b3bdc3ac
LR		 850 if (!err)
851 macsec_skb_cb(skb)->valid = true;
852
c09440f7
SD		 853 rcu_read_lock_bh();
854 pn = ntohl(macsec_ethhdr(skb)->packet_number);
855 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
856 rcu_read_unlock_bh();
857 kfree_skb(skb);
858 goto out;
859 }
860
861 macsec_finalize_skb(skb, macsec->secy.icv_len,
862 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
91ec9bd5 863 len = skb->len;
c09440f7
SD		 864 macsec_reset_skb(skb, macsec->secy.netdev);
865
863483c9 866 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
c09440f7 867 count_rx(dev, len);
c09440f7
SD		 868
869 rcu_read_unlock_bh();
870
871out:
872 macsec_rxsa_put(rx_sa);
c78ebe1d 873 macsec_rxsc_put(rx_sc);
c09440f7 874 dev_put(dev);
c09440f7
SD		 875}
876
877static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
878 struct net_device *dev,
879 struct macsec_rx_sa *rx_sa,
880 sci_t sci,
881 struct macsec_secy *secy)
882{
883 int ret;
5d9649b3 884 struct scatterlist *sg;
5294b830 885 struct sk_buff *trailer;
5d9649b3 886 unsigned char *iv;
c09440f7
SD		 887 struct aead_request *req;
888 struct macsec_eth_header *hdr;
a21ecf0e 889 u32 hdr_pn;
c09440f7
SD		 890 u16 icv_len = secy->icv_len;
891
892 macsec_skb_cb(skb)->valid = false;
893 skb = skb_share_check(skb, GFP_ATOMIC);
894 if (!skb)
c3b7d0bd 895 return ERR_PTR(-ENOMEM);
c09440f7 896
5294b830
JD		 897 ret = skb_cow_data(skb, 0, &trailer);
898 if (unlikely(ret < 0)) {
899 kfree_skb(skb);
900 return ERR_PTR(ret);
901 }
902 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 903 if (!req) {
904 kfree_skb(skb);
c3b7d0bd 905 return ERR_PTR(-ENOMEM);
c09440f7
SD		 906 }
907
908 hdr = (struct macsec_eth_header *)skb->data;
a21ecf0e
EM		 909 hdr_pn = ntohl(hdr->packet_number);
910
911 if (secy->xpn) {
912 pn_t recovered_pn = rx_sa->next_pn_halves;
913
914 recovered_pn.lower = hdr_pn;
915 if (hdr_pn < rx_sa->next_pn_halves.lower &&
916 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
917 recovered_pn.upper++;
918
919 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
920 rx_sa->key.salt);
921 } else {
922 macsec_fill_iv(iv, sci, hdr_pn);
923 }
c09440f7 924
5294b830 925 sg_init_table(sg, ret);
cda7ea69
JD		 926 ret = skb_to_sgvec(skb, sg, 0, skb->len);
927 if (unlikely(ret < 0)) {
5aba2ba5 928 aead_request_free(req);
cda7ea69
JD		 929 kfree_skb(skb);
930 return ERR_PTR(ret);
931 }
c09440f7
SD		 932
933 if (hdr->tci_an & MACSEC_TCI_E) {
934 /* confidentiality: ethernet + macsec header
935 * authenticated, encrypted payload
936 */
937 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
938
939 aead_request_set_crypt(req, sg, sg, len, iv);
940 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
941 skb = skb_unshare(skb, GFP_ATOMIC);
942 if (!skb) {
943 aead_request_free(req);
c3b7d0bd 944 return ERR_PTR(-ENOMEM);
c09440f7
SD		 945 }
946 } else {
947 /* integrity only: all headers + data authenticated */
948 aead_request_set_crypt(req, sg, sg, icv_len, iv);
949 aead_request_set_ad(req, skb->len - icv_len);
950 }
951
952 macsec_skb_cb(skb)->req = req;
c09440f7
SD		 953 skb->dev = dev;
954 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
955
956 dev_hold(dev);
957 ret = crypto_aead_decrypt(req);
958 if (ret == -EINPROGRESS) {
c3b7d0bd 959 return ERR_PTR(ret);
c09440f7
SD		 960 } else if (ret != 0) {
961 /* decryption/authentication failed
962 * 10.6 if validateFrames is disabled, deliver anyway
963 */
964 if (ret != -EBADMSG) {
965 kfree_skb(skb);
c3b7d0bd 966 skb = ERR_PTR(ret);
c09440f7
SD		 967 }
968 } else {
969 macsec_skb_cb(skb)->valid = true;
970 }
971 dev_put(dev);
972
973 aead_request_free(req);
974
975 return skb;
976}
977
978static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
979{
980 struct macsec_rx_sc *rx_sc;
981
982 for_each_rxsc(secy, rx_sc) {
983 if (rx_sc->sci == sci)
984 return rx_sc;
985 }
986
987 return NULL;
988}
989
990static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
991{
992 struct macsec_rx_sc *rx_sc;
993
994 for_each_rxsc_rtnl(secy, rx_sc) {
995 if (rx_sc->sci == sci)
996 return rx_sc;
997 }
998
999 return NULL;
1000}
1001
3cf3227a 1002static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
c09440f7 1003{
3cf3227a
AT		 1004 /* Deliver to the uncontrolled port by default */
1005 enum rx_handler_result ret = RX_HANDLER_PASS;
f428011b 1006 struct ethhdr *hdr = eth_hdr(skb);
860ead89 1007 struct metadata_dst *md_dst;
c09440f7
SD		 1008 struct macsec_rxh_data *rxd;
1009 struct macsec_dev *macsec;
1010
1011 rcu_read_lock();
1012 rxd = macsec_data_rcu(skb->dev);
860ead89 1013 md_dst = skb_metadata_dst(skb);
c09440f7 1014
c09440f7
SD		 1015 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1016 struct sk_buff *nskb;
c09440f7 1017 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
f428011b
MS		 1018 struct net_device *ndev = macsec->secy.netdev;
1019
1020 /* If h/w offloading is enabled, HW decodes frames and strips
1021 * the SecTAG, so we have to deduce which port to deliver to.
1022 */
1023 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
860ead89
LN		 1024 if (md_dst && md_dst->type == METADATA_MACSEC &&
1025 (!find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci)))
1026 continue;
1027
f428011b
MS		 1028 if (ether_addr_equal_64bits(hdr->h_dest,
1029 ndev->dev_addr)) {
1030 /* exact match, divert skb to this port */
1031 skb->dev = ndev;
1032 skb->pkt_type = PACKET_HOST;
1033 ret = RX_HANDLER_ANOTHER;
1034 goto out;
1035 } else if (is_multicast_ether_addr_64bits(
1036 hdr->h_dest)) {
1037 /* multicast frame, deliver on this port too */
1038 nskb = skb_clone(skb, GFP_ATOMIC);
1039 if (!nskb)
1040 break;
1041
1042 nskb->dev = ndev;
1043 if (ether_addr_equal_64bits(hdr->h_dest,
1044 ndev->broadcast))
1045 nskb->pkt_type = PACKET_BROADCAST;
1046 else
1047 nskb->pkt_type = PACKET_MULTICAST;
1048
baebdf48 1049 __netif_rx(nskb);
f428011b
MS		 1050 }
1051 continue;
1052 }
c09440f7 1053
f428011b
MS		 1054 /* 10.6 If the management control validateFrames is not
1055 * Strict, frames without a SecTAG are received, counted, and
1056 * delivered to the Controlled Port
1057 */
1058 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
c09440f7
SD		 1059 u64_stats_update_begin(&secy_stats->syncp);
1060 secy_stats->stats.InPktsNoTag++;
1061 u64_stats_update_end(&secy_stats->syncp);
91ec9bd5 1062 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1063 continue;
1064 }
1065
1066 /* deliver on this port */
1067 nskb = skb_clone(skb, GFP_ATOMIC);
1068 if (!nskb)
1069 break;
1070
f428011b 1071 nskb->dev = ndev;
c09440f7 1072
baebdf48 1073 if (__netif_rx(nskb) == NET_RX_SUCCESS) {
c09440f7
SD		 1074 u64_stats_update_begin(&secy_stats->syncp);
1075 secy_stats->stats.InPktsUntagged++;
1076 u64_stats_update_end(&secy_stats->syncp);
c09440f7
SD		 1077 }
1078 }
1079
3cf3227a 1080out:
c09440f7 1081 rcu_read_unlock();
3cf3227a 1082 return ret;
c09440f7
SD		 1083}
1084
1085static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1086{
1087 struct sk_buff *skb = *pskb;
1088 struct net_device *dev = skb->dev;
1089 struct macsec_eth_header *hdr;
1090 struct macsec_secy *secy = NULL;
1091 struct macsec_rx_sc *rx_sc;
1092 struct macsec_rx_sa *rx_sa;
1093 struct macsec_rxh_data *rxd;
1094 struct macsec_dev *macsec;
c7cc9200 1095 unsigned int len;
c09440f7 1096 sci_t sci;
a21ecf0e 1097 u32 hdr_pn;
c09440f7
SD		 1098 bool cbit;
1099 struct pcpu_rx_sc_stats *rxsc_stats;
1100 struct pcpu_secy_stats *secy_stats;
1101 bool pulled_sci;
5491e7c6 1102 int ret;
c09440f7
SD		 1103
1104 if (skb_headroom(skb) < ETH_HLEN)
1105 goto drop_direct;
1106
1107 hdr = macsec_ethhdr(skb);
3cf3227a
AT		 1108 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1109 return handle_not_macsec(skb);
c09440f7
SD		 1110
1111 skb = skb_unshare(skb, GFP_ATOMIC);
095c02da
AS		 1112 *pskb = skb;
1113 if (!skb)
c09440f7 1114 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1115
1116 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1117 if (!pulled_sci) {
1118 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1119 goto drop_direct;
1120 }
1121
1122 hdr = macsec_ethhdr(skb);
1123
1124 /* Frames with a SecTAG that has the TCI E bit set but the C
1125 * bit clear are discarded, as this reserved encoding is used
1126 * to identify frames with a SecTAG that are not to be
1127 * delivered to the Controlled Port.
1128 */
1129 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1130 return RX_HANDLER_PASS;
1131
1132 /* now, pull the extra length */
1133 if (hdr->tci_an & MACSEC_TCI_SC) {
1134 if (!pulled_sci)
1135 goto drop_direct;
1136 }
1137
1138 /* ethernet header is part of crypto processing */
1139 skb_push(skb, ETH_HLEN);
1140
1141 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1142 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1143 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1144
1145 rcu_read_lock();
1146 rxd = macsec_data_rcu(skb->dev);
1147
1148 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1149 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
7979472b 1150
c78ebe1d 1151 sc = sc ? macsec_rxsc_get(sc) : NULL;
c09440f7
SD		 1152
1153 if (sc) {
1154 secy = &macsec->secy;
1155 rx_sc = sc;
1156 break;
1157 }
1158 }
1159
1160 if (!secy)
1161 goto nosci;
1162
1163 dev = secy->netdev;
1164 macsec = macsec_priv(dev);
1165 secy_stats = this_cpu_ptr(macsec->stats);
1166 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1167
a21ecf0e 1168 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
c09440f7
SD		 1169 u64_stats_update_begin(&secy_stats->syncp);
1170 secy_stats->stats.InPktsBadTag++;
1171 u64_stats_update_end(&secy_stats->syncp);
91ec9bd5 1172 secy->netdev->stats.rx_errors++;
c09440f7
SD		 1173 goto drop_nosa;
1174 }
1175
1176 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1177 if (!rx_sa) {
1178 /* 10.6.1 if the SA is not in use */
1179
1180 /* If validateFrames is Strict or the C bit in the
1181 * SecTAG is set, discard
1182 */
91ec9bd5 1183 struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc);
c09440f7
SD		 1184 if (hdr->tci_an & MACSEC_TCI_C ||
1185 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1186 u64_stats_update_begin(&rxsc_stats->syncp);
1187 rxsc_stats->stats.InPktsNotUsingSA++;
1188 u64_stats_update_end(&rxsc_stats->syncp);
91ec9bd5
CY		 1189 secy->netdev->stats.rx_errors++;
1190 if (active_rx_sa)
1191 this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA);
c09440f7
SD		 1192 goto drop_nosa;
1193 }
1194
1195 /* not Strict, the frame (with the SecTAG and ICV
1196 * removed) is delivered to the Controlled Port.
1197 */
1198 u64_stats_update_begin(&rxsc_stats->syncp);
1199 rxsc_stats->stats.InPktsUnusedSA++;
1200 u64_stats_update_end(&rxsc_stats->syncp);
91ec9bd5
CY		 1201 if (active_rx_sa)
1202 this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA);
c09440f7
SD		 1203 goto deliver;
1204 }
1205
1206 /* First, PN check to avoid decrypting obviously wrong packets */
a21ecf0e 1207 hdr_pn = ntohl(hdr->packet_number);
c09440f7
SD		 1208 if (secy->replay_protect) {
1209 bool late;
1210
1211 spin_lock(&rx_sa->lock);
a21ecf0e
EM		 1212 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1213 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1214
1215 if (secy->xpn)
1216 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
c09440f7
SD		 1217 spin_unlock(&rx_sa->lock);
1218
1219 if (late) {
1220 u64_stats_update_begin(&rxsc_stats->syncp);
1221 rxsc_stats->stats.InPktsLate++;
1222 u64_stats_update_end(&rxsc_stats->syncp);
91ec9bd5 1223 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1224 goto drop;
1225 }
1226 }
1227
e3a3b626
BG		 1228 macsec_skb_cb(skb)->rx_sa = rx_sa;
1229
c09440f7
SD		 1230 /* Disabled && !changed text => skip validation */
1231 if (hdr->tci_an & MACSEC_TCI_C ||
1232 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1233 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1234
c3b7d0bd
SD		 1235 if (IS_ERR(skb)) {
1236 /* the decrypt callback needs the reference */
c78ebe1d 1237 if (PTR_ERR(skb) != -EINPROGRESS) {
c3b7d0bd 1238 macsec_rxsa_put(rx_sa);
c78ebe1d
SD		 1239 macsec_rxsc_put(rx_sc);
1240 }
c09440f7
SD		 1241 rcu_read_unlock();
1242 *pskb = NULL;
1243 return RX_HANDLER_CONSUMED;
1244 }
1245
a21ecf0e 1246 if (!macsec_post_decrypt(skb, secy, hdr_pn))
c09440f7
SD		 1247 goto drop;
1248
1249deliver:
1250 macsec_finalize_skb(skb, secy->icv_len,
1251 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
91ec9bd5 1252 len = skb->len;
c09440f7
SD		 1253 macsec_reset_skb(skb, secy->netdev);
1254
497f358a
SD		 1255 if (rx_sa)
1256 macsec_rxsa_put(rx_sa);
c78ebe1d 1257 macsec_rxsc_put(rx_sc);
5491e7c6 1258
ba56d8ce 1259 skb_orphan(skb);
5491e7c6
PA		 1260 ret = gro_cells_receive(&macsec->gro_cells, skb);
1261 if (ret == NET_RX_SUCCESS)
c7cc9200 1262 count_rx(dev, len);
5491e7c6
PA		 1263 else
1264 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1265
1266 rcu_read_unlock();
1267
5491e7c6
PA		 1268 *pskb = NULL;
1269 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1270
1271drop:
1272 macsec_rxsa_put(rx_sa);
1273drop_nosa:
c78ebe1d 1274 macsec_rxsc_put(rx_sc);
c09440f7
SD		 1275 rcu_read_unlock();
1276drop_direct:
1277 kfree_skb(skb);
1278 *pskb = NULL;
1279 return RX_HANDLER_CONSUMED;
1280
1281nosci:
1282 /* 10.6.1 if the SC is not found */
1283 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1284 if (!cbit)
b1671253 1285 macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN,
c09440f7
SD		 1286 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1287
1288 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1289 struct sk_buff *nskb;
c09440f7
SD		 1290
1291 secy_stats = this_cpu_ptr(macsec->stats);
1292
1293 /* If validateFrames is Strict or the C bit in the
1294 * SecTAG is set, discard
1295 */
1296 if (cbit ||
1297 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1298 u64_stats_update_begin(&secy_stats->syncp);
1299 secy_stats->stats.InPktsNoSCI++;
1300 u64_stats_update_end(&secy_stats->syncp);
91ec9bd5 1301 macsec->secy.netdev->stats.rx_errors++;
c09440f7
SD		 1302 continue;
1303 }
1304
1305 /* not strict, the frame (with the SecTAG and ICV
1306 * removed) is delivered to the Controlled Port.
1307 */
1308 nskb = skb_clone(skb, GFP_ATOMIC);
1309 if (!nskb)
1310 break;
1311
1312 macsec_reset_skb(nskb, macsec->secy.netdev);
1313
baebdf48 1314 ret = __netif_rx(nskb);
c09440f7
SD		 1315 if (ret == NET_RX_SUCCESS) {
1316 u64_stats_update_begin(&secy_stats->syncp);
1317 secy_stats->stats.InPktsUnknownSCI++;
1318 u64_stats_update_end(&secy_stats->syncp);
1319 } else {
1320 macsec->secy.netdev->stats.rx_dropped++;
1321 }
1322 }
1323
1324 rcu_read_unlock();
1325 *pskb = skb;
1326 return RX_HANDLER_PASS;
1327}
1328
1329static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1330{
1331 struct crypto_aead *tfm;
1332 int ret;
1333
ab046a5d
SD		 1334 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1335 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
34aedfee
DC		 1336
1337 if (IS_ERR(tfm))
1338 return tfm;
c09440f7
SD		 1339
1340 ret = crypto_aead_setkey(tfm, key, key_len);
34aedfee
DC		 1341 if (ret < 0)
1342 goto fail;
c09440f7
SD		 1343
1344 ret = crypto_aead_setauthsize(tfm, icv_len);
34aedfee
DC		 1345 if (ret < 0)
1346 goto fail;
c09440f7
SD		 1347
1348 return tfm;
34aedfee
DC		 1349fail:
1350 crypto_free_aead(tfm);
1351 return ERR_PTR(ret);
c09440f7
SD		 1352}
1353
1354static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1355 int icv_len)
1356{
1357 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1358 if (!rx_sa->stats)
34aedfee 1359 return -ENOMEM;
c09440f7
SD		 1360
1361 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1362 if (IS_ERR(rx_sa->key.tfm)) {
c09440f7 1363 free_percpu(rx_sa->stats);
34aedfee 1364 return PTR_ERR(rx_sa->key.tfm);
c09440f7
SD		 1365 }
1366
48ef50fa 1367 rx_sa->ssci = MACSEC_UNDEF_SSCI;
c09440f7
SD		 1368 rx_sa->active = false;
1369 rx_sa->next_pn = 1;
e187246f 1370 refcount_set(&rx_sa->refcnt, 1);
c09440f7
SD		 1371 spin_lock_init(&rx_sa->lock);
1372
1373 return 0;
1374}
1375
1376static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1377{
1378 rx_sa->active = false;
1379
1380 macsec_rxsa_put(rx_sa);
1381}
1382
1383static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1384{
1385 int i;
1386
1387 for (i = 0; i < MACSEC_NUM_AN; i++) {
1388 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1389
1390 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1391 if (sa)
1392 clear_rx_sa(sa);
1393 }
1394
1395 macsec_rxsc_put(rx_sc);
1396}
1397
1398static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1399{
1400 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1401
1402 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1403 rx_sc;
1404 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1405 if (rx_sc->sci == sci) {
1406 if (rx_sc->active)
1407 secy->n_rx_sc--;
1408 rcu_assign_pointer(*rx_scp, rx_sc->next);
1409 return rx_sc;
1410 }
1411 }
1412
1413 return NULL;
1414}
1415
1416static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1417{
1418 struct macsec_rx_sc *rx_sc;
1419 struct macsec_dev *macsec;
1420 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1421 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1422 struct macsec_secy *secy;
1423
1424 list_for_each_entry(macsec, &rxd->secys, secys) {
1425 if (find_rx_sc_rtnl(&macsec->secy, sci))
1426 return ERR_PTR(-EEXIST);
1427 }
1428
1429 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1430 if (!rx_sc)
1431 return ERR_PTR(-ENOMEM);
1432
1433 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1434 if (!rx_sc->stats) {
1435 kfree(rx_sc);
1436 return ERR_PTR(-ENOMEM);
1437 }
1438
1439 rx_sc->sci = sci;
1440 rx_sc->active = true;
8676d76f 1441 refcount_set(&rx_sc->refcnt, 1);
c09440f7
SD		 1442
1443 secy = &macsec_priv(dev)->secy;
1444 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1445 rcu_assign_pointer(secy->rx_sc, rx_sc);
1446
1447 if (rx_sc->active)
1448 secy->n_rx_sc++;
1449
1450 return rx_sc;
1451}
1452
1453static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1454 int icv_len)
1455{
1456 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1457 if (!tx_sa->stats)
34aedfee 1458 return -ENOMEM;
c09440f7
SD		 1459
1460 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1461 if (IS_ERR(tx_sa->key.tfm)) {
c09440f7 1462 free_percpu(tx_sa->stats);
34aedfee 1463 return PTR_ERR(tx_sa->key.tfm);
c09440f7
SD		 1464 }
1465
48ef50fa 1466 tx_sa->ssci = MACSEC_UNDEF_SSCI;
c09440f7 1467 tx_sa->active = false;
28206cdb 1468 refcount_set(&tx_sa->refcnt, 1);
c09440f7
SD		 1469 spin_lock_init(&tx_sa->lock);
1470
1471 return 0;
1472}
1473
1474static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1475{
1476 tx_sa->active = false;
1477
1478 macsec_txsa_put(tx_sa);
1479}
1480
489111e5 1481static struct genl_family macsec_fam;
c09440f7
SD		 1482
1483static struct net_device *get_dev_from_nl(struct net *net,
1484 struct nlattr **attrs)
1485{
1486 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1487 struct net_device *dev;
1488
1489 dev = __dev_get_by_index(net, ifindex);
1490 if (!dev)
1491 return ERR_PTR(-ENODEV);
1492
1493 if (!netif_is_macsec(dev))
1494 return ERR_PTR(-ENODEV);
1495
1496 return dev;
1497}
1498
791bb3fc
MS		 1499static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1500{
1501 return (__force enum macsec_offload)nla_get_u8(nla);
1502}
1503
c09440f7
SD		 1504static sci_t nla_get_sci(const struct nlattr *nla)
1505{
1506 return (__force sci_t)nla_get_u64(nla);
1507}
1508
f60d94c0
ND		 1509static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1510 int padattr)
c09440f7 1511{
f60d94c0 1512 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
c09440f7
SD		 1513}
1514
48ef50fa
EM		 1515static ssci_t nla_get_ssci(const struct nlattr *nla)
1516{
1517 return (__force ssci_t)nla_get_u32(nla);
1518}
1519
1520static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1521{
1522 return nla_put_u32(skb, attrtype, (__force u64)value);
1523}
1524
c09440f7
SD		 1525static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1526 struct nlattr **attrs,
1527 struct nlattr **tb_sa,
1528 struct net_device **devp,
1529 struct macsec_secy **secyp,
1530 struct macsec_tx_sc **scp,
1531 u8 *assoc_num)
1532{
1533 struct net_device *dev;
1534 struct macsec_secy *secy;
1535 struct macsec_tx_sc *tx_sc;
1536 struct macsec_tx_sa *tx_sa;
1537
1538 if (!tb_sa[MACSEC_SA_ATTR_AN])
1539 return ERR_PTR(-EINVAL);
1540
1541 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1542
1543 dev = get_dev_from_nl(net, attrs);
1544 if (IS_ERR(dev))
1545 return ERR_CAST(dev);
1546
1547 if (*assoc_num >= MACSEC_NUM_AN)
1548 return ERR_PTR(-EINVAL);
1549
1550 secy = &macsec_priv(dev)->secy;
1551 tx_sc = &secy->tx_sc;
1552
1553 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1554 if (!tx_sa)
1555 return ERR_PTR(-ENODEV);
1556
1557 *devp = dev;
1558 *scp = tx_sc;
1559 *secyp = secy;
1560 return tx_sa;
1561}
1562
1563static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1564 struct nlattr **attrs,
1565 struct nlattr **tb_rxsc,
1566 struct net_device **devp,
1567 struct macsec_secy **secyp)
1568{
1569 struct net_device *dev;
1570 struct macsec_secy *secy;
1571 struct macsec_rx_sc *rx_sc;
1572 sci_t sci;
1573
1574 dev = get_dev_from_nl(net, attrs);
1575 if (IS_ERR(dev))
1576 return ERR_CAST(dev);
1577
1578 secy = &macsec_priv(dev)->secy;
1579
1580 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1581 return ERR_PTR(-EINVAL);
1582
1583 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1584 rx_sc = find_rx_sc_rtnl(secy, sci);
1585 if (!rx_sc)
1586 return ERR_PTR(-ENODEV);
1587
1588 *secyp = secy;
1589 *devp = dev;
1590
1591 return rx_sc;
1592}
1593
1594static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1595 struct nlattr **attrs,
1596 struct nlattr **tb_rxsc,
1597 struct nlattr **tb_sa,
1598 struct net_device **devp,
1599 struct macsec_secy **secyp,
1600 struct macsec_rx_sc **scp,
1601 u8 *assoc_num)
1602{
1603 struct macsec_rx_sc *rx_sc;
1604 struct macsec_rx_sa *rx_sa;
1605
1606 if (!tb_sa[MACSEC_SA_ATTR_AN])
1607 return ERR_PTR(-EINVAL);
1608
1609 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1610 if (*assoc_num >= MACSEC_NUM_AN)
1611 return ERR_PTR(-EINVAL);
1612
1613 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1614 if (IS_ERR(rx_sc))
1615 return ERR_CAST(rx_sc);
1616
1617 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1618 if (!rx_sa)
1619 return ERR_PTR(-ENODEV);
1620
1621 *scp = rx_sc;
1622 return rx_sa;
1623}
1624
c09440f7
SD		 1625static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1626 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1627 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1628 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
dcb780fb 1629 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
c09440f7
SD		 1630};
1631
1632static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1633 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1634 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1635};
1636
1637static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1638 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1639 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
bc043585 1640 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
8acca6ac
SD		 1641 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1642 .len = MACSEC_KEYID_LEN, },
c09440f7 1643 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
e8660ded 1644 .len = MACSEC_MAX_KEY_LEN, },
48ef50fa
EM		 1645 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1646 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1647 .len = MACSEC_SALT_LEN, },
c09440f7
SD		 1648};
1649
dcb780fb
AT		 1650static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1651 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1652};
1653
3cf3227a
AT		 1654/* Offloads an operation to a device driver */
1655static int macsec_offload(int (* const func)(struct macsec_context *),
1656 struct macsec_context *ctx)
1657{
1658 int ret;
1659
1660 if (unlikely(!func))
1661 return 0;
1662
1663 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1664 mutex_lock(&ctx->phydev->lock);
1665
3cf3227a 1666 ret = (*func)(ctx);
3cf3227a 1667
3cf3227a
AT		 1668 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1669 mutex_unlock(&ctx->phydev->lock);
1670
1671 return ret;
1672}
1673
c09440f7
SD		 1674static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1675{
1676 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1677 return -EINVAL;
1678
8cb08174 1679 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
c09440f7
SD		 1680 return -EINVAL;
1681
1682 return 0;
1683}
1684
1685static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1686{
1687 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1688 return -EINVAL;
1689
8cb08174 1690 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
c09440f7
SD		 1691 return -EINVAL;
1692
1693 return 0;
1694}
1695
1696static bool validate_add_rxsa(struct nlattr **attrs)
1697{
1698 if (!attrs[MACSEC_SA_ATTR_AN] ||
1699 !attrs[MACSEC_SA_ATTR_KEY] ||
1700 !attrs[MACSEC_SA_ATTR_KEYID])
1701 return false;
1702
1703 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1704 return false;
1705
48ef50fa 1706 if (attrs[MACSEC_SA_ATTR_PN] &&
c630d1fe 1707 nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
c09440f7
SD		 1708 return false;
1709
1710 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1711 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1712 return false;
1713 }
1714
8acca6ac
SD		 1715 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1716 return false;
1717
c09440f7
SD		 1718 return true;
1719}
1720
1721static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1722{
1723 struct net_device *dev;
1724 struct nlattr **attrs = info->attrs;
1725 struct macsec_secy *secy;
1726 struct macsec_rx_sc *rx_sc;
1727 struct macsec_rx_sa *rx_sa;
1728 unsigned char assoc_num;
48ef50fa 1729 int pn_len;
c09440f7
SD		 1730 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1731 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1732 int err;
c09440f7
SD		 1733
1734 if (!attrs[MACSEC_ATTR_IFINDEX])
1735 return -EINVAL;
1736
1737 if (parse_sa_config(attrs, tb_sa))
1738 return -EINVAL;
1739
1740 if (parse_rxsc_config(attrs, tb_rxsc))
1741 return -EINVAL;
1742
1743 if (!validate_add_rxsa(tb_sa))
1744 return -EINVAL;
1745
1746 rtnl_lock();
1747 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
36b232c8 1748 if (IS_ERR(rx_sc)) {
c09440f7
SD		 1749 rtnl_unlock();
1750 return PTR_ERR(rx_sc);
1751 }
1752
1753 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1754
1755 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1756 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1757 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1758 rtnl_unlock();
1759 return -EINVAL;
1760 }
1761
48ef50fa 1762 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
f46040ee
SD		 1763 if (tb_sa[MACSEC_SA_ATTR_PN] &&
1764 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
48ef50fa
EM		 1765 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1766 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1767 rtnl_unlock();
1768 return -EINVAL;
1769 }
1770
1771 if (secy->xpn) {
1772 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1773 rtnl_unlock();
1774 return -EINVAL;
1775 }
1776
1777 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1778 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1779 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
3240eac4 1780 MACSEC_SALT_LEN);
48ef50fa
EM		 1781 rtnl_unlock();
1782 return -EINVAL;
1783 }
1784 }
1785
c09440f7
SD		 1786 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1787 if (rx_sa) {
1788 rtnl_unlock();
1789 return -EBUSY;
1790 }
1791
1792 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
34aedfee 1793 if (!rx_sa) {
c09440f7
SD		 1794 rtnl_unlock();
1795 return -ENOMEM;
1796 }
1797
34aedfee
DC		 1798 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1799 secy->key_len, secy->icv_len);
1800 if (err < 0) {
1801 kfree(rx_sa);
1802 rtnl_unlock();
1803 return err;
1804 }
1805
c09440f7
SD		 1806 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1807 spin_lock_bh(&rx_sa->lock);
48ef50fa 1808 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 1809 spin_unlock_bh(&rx_sa->lock);
1810 }
1811
1812 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1813 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1814
c09440f7 1815 rx_sa->sc = rx_sc;
3cf3227a 1816
0a6e9b71
EH		 1817 if (secy->xpn) {
1818 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1819 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1820 MACSEC_SALT_LEN);
1821 }
1822
3cf3227a
AT		 1823 /* If h/w offloading is available, propagate to the device */
1824 if (macsec_is_offloaded(netdev_priv(dev))) {
1825 const struct macsec_ops *ops;
1826 struct macsec_context ctx;
1827
1828 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1829 if (!ops) {
1830 err = -EOPNOTSUPP;
1831 goto cleanup;
1832 }
1833
1834 ctx.sa.assoc_num = assoc_num;
1835 ctx.sa.rx_sa = rx_sa;
182879f8 1836 ctx.secy = secy;
3cf3227a 1837 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1f7fe512 1838 secy->key_len);
3cf3227a
AT		 1839
1840 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1841 if (err)
1842 goto cleanup;
1843 }
1844
1845 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1846 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1847
1848 rtnl_unlock();
1849
1850 return 0;
3cf3227a
AT		 1851
1852cleanup:
c7b205fb 1853 macsec_rxsa_put(rx_sa);
3cf3227a
AT		 1854 rtnl_unlock();
1855 return err;
c09440f7
SD		 1856}
1857
1858static bool validate_add_rxsc(struct nlattr **attrs)
1859{
1860 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1861 return false;
1862
1863 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1864 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1865 return false;
1866 }
1867
1868 return true;
1869}
1870
1871static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1872{
1873 struct net_device *dev;
1874 sci_t sci = MACSEC_UNDEF_SCI;
1875 struct nlattr **attrs = info->attrs;
1876 struct macsec_rx_sc *rx_sc;
1877 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
182879f8 1878 struct macsec_secy *secy;
3cf3227a
AT		 1879 bool was_active;
1880 int ret;
c09440f7
SD		 1881
1882 if (!attrs[MACSEC_ATTR_IFINDEX])
1883 return -EINVAL;
1884
1885 if (parse_rxsc_config(attrs, tb_rxsc))
1886 return -EINVAL;
1887
1888 if (!validate_add_rxsc(tb_rxsc))
1889 return -EINVAL;
1890
1891 rtnl_lock();
1892 dev = get_dev_from_nl(genl_info_net(info), attrs);
1893 if (IS_ERR(dev)) {
1894 rtnl_unlock();
1895 return PTR_ERR(dev);
1896 }
1897
182879f8 1898 secy = &macsec_priv(dev)->secy;
c09440f7
SD		 1899 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1900
1901 rx_sc = create_rx_sc(dev, sci);
1902 if (IS_ERR(rx_sc)) {
1903 rtnl_unlock();
1904 return PTR_ERR(rx_sc);
1905 }
1906
3cf3227a 1907 was_active = rx_sc->active;
c09440f7
SD		 1908 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1909 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1910
3cf3227a
AT		 1911 if (macsec_is_offloaded(netdev_priv(dev))) {
1912 const struct macsec_ops *ops;
1913 struct macsec_context ctx;
1914
1915 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1916 if (!ops) {
1917 ret = -EOPNOTSUPP;
1918 goto cleanup;
1919 }
1920
1921 ctx.rx_sc = rx_sc;
182879f8 1922 ctx.secy = secy;
3cf3227a
AT		 1923
1924 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1925 if (ret)
1926 goto cleanup;
1927 }
1928
c09440f7
SD		 1929 rtnl_unlock();
1930
1931 return 0;
3cf3227a
AT		 1932
1933cleanup:
1934 rx_sc->active = was_active;
1935 rtnl_unlock();
1936 return ret;
c09440f7
SD		 1937}
1938
1939static bool validate_add_txsa(struct nlattr **attrs)
1940{
1941 if (!attrs[MACSEC_SA_ATTR_AN] ||
1942 !attrs[MACSEC_SA_ATTR_PN] ||
1943 !attrs[MACSEC_SA_ATTR_KEY] ||
1944 !attrs[MACSEC_SA_ATTR_KEYID])
1945 return false;
1946
1947 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1948 return false;
1949
c630d1fe 1950 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
c09440f7
SD		 1951 return false;
1952
1953 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1954 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1955 return false;
1956 }
1957
8acca6ac
SD		 1958 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1959 return false;
1960
c09440f7
SD		 1961 return true;
1962}
1963
1964static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1965{
1966 struct net_device *dev;
1967 struct nlattr **attrs = info->attrs;
1968 struct macsec_secy *secy;
1969 struct macsec_tx_sc *tx_sc;
1970 struct macsec_tx_sa *tx_sa;
1971 unsigned char assoc_num;
48ef50fa 1972 int pn_len;
c09440f7 1973 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 1974 bool was_operational;
34aedfee 1975 int err;
c09440f7
SD		 1976
1977 if (!attrs[MACSEC_ATTR_IFINDEX])
1978 return -EINVAL;
1979
1980 if (parse_sa_config(attrs, tb_sa))
1981 return -EINVAL;
1982
1983 if (!validate_add_txsa(tb_sa))
1984 return -EINVAL;
1985
1986 rtnl_lock();
1987 dev = get_dev_from_nl(genl_info_net(info), attrs);
1988 if (IS_ERR(dev)) {
1989 rtnl_unlock();
1990 return PTR_ERR(dev);
1991 }
1992
1993 secy = &macsec_priv(dev)->secy;
1994 tx_sc = &secy->tx_sc;
1995
1996 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1997
1998 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1999 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
2000 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
2001 rtnl_unlock();
2002 return -EINVAL;
2003 }
2004
48ef50fa
EM		 2005 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2006 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2007 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2008 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2009 rtnl_unlock();
2010 return -EINVAL;
2011 }
2012
2013 if (secy->xpn) {
2014 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2015 rtnl_unlock();
2016 return -EINVAL;
2017 }
2018
2019 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2020 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2021 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
3240eac4 2022 MACSEC_SALT_LEN);
48ef50fa
EM		 2023 rtnl_unlock();
2024 return -EINVAL;
2025 }
2026 }
2027
c09440f7
SD		 2028 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2029 if (tx_sa) {
2030 rtnl_unlock();
2031 return -EBUSY;
2032 }
2033
2034 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
34aedfee 2035 if (!tx_sa) {
c09440f7
SD		 2036 rtnl_unlock();
2037 return -ENOMEM;
2038 }
2039
34aedfee
DC		 2040 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2041 secy->key_len, secy->icv_len);
2042 if (err < 0) {
2043 kfree(tx_sa);
2044 rtnl_unlock();
2045 return err;
2046 }
2047
c09440f7 2048 spin_lock_bh(&tx_sa->lock);
48ef50fa 2049 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2050 spin_unlock_bh(&tx_sa->lock);
2051
2052 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2053 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2054
3cf3227a 2055 was_operational = secy->operational;
c09440f7
SD		 2056 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2057 secy->operational = true;
2058
0a6e9b71
EH		 2059 if (secy->xpn) {
2060 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2061 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2062 MACSEC_SALT_LEN);
2063 }
2064
3cf3227a
AT		 2065 /* If h/w offloading is available, propagate to the device */
2066 if (macsec_is_offloaded(netdev_priv(dev))) {
2067 const struct macsec_ops *ops;
2068 struct macsec_context ctx;
2069
2070 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2071 if (!ops) {
2072 err = -EOPNOTSUPP;
2073 goto cleanup;
2074 }
2075
2076 ctx.sa.assoc_num = assoc_num;
2077 ctx.sa.tx_sa = tx_sa;
182879f8 2078 ctx.secy = secy;
3cf3227a 2079 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1f7fe512 2080 secy->key_len);
3cf3227a
AT		 2081
2082 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2083 if (err)
2084 goto cleanup;
2085 }
2086
2087 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 2088 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2089
2090 rtnl_unlock();
2091
2092 return 0;
3cf3227a
AT		 2093
2094cleanup:
2095 secy->operational = was_operational;
c7b205fb 2096 macsec_txsa_put(tx_sa);
3cf3227a
AT		 2097 rtnl_unlock();
2098 return err;
c09440f7
SD		 2099}
2100
2101static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2102{
2103 struct nlattr **attrs = info->attrs;
2104 struct net_device *dev;
2105 struct macsec_secy *secy;
2106 struct macsec_rx_sc *rx_sc;
2107 struct macsec_rx_sa *rx_sa;
2108 u8 assoc_num;
2109 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2110 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2111 int ret;
c09440f7
SD		 2112
2113 if (!attrs[MACSEC_ATTR_IFINDEX])
2114 return -EINVAL;
2115
2116 if (parse_sa_config(attrs, tb_sa))
2117 return -EINVAL;
2118
2119 if (parse_rxsc_config(attrs, tb_rxsc))
2120 return -EINVAL;
2121
2122 rtnl_lock();
2123 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2124 &dev, &secy, &rx_sc, &assoc_num);
2125 if (IS_ERR(rx_sa)) {
2126 rtnl_unlock();
2127 return PTR_ERR(rx_sa);
2128 }
2129
2130 if (rx_sa->active) {
2131 rtnl_unlock();
2132 return -EBUSY;
2133 }
2134
3cf3227a
AT		 2135 /* If h/w offloading is available, propagate to the device */
2136 if (macsec_is_offloaded(netdev_priv(dev))) {
2137 const struct macsec_ops *ops;
2138 struct macsec_context ctx;
2139
2140 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2141 if (!ops) {
2142 ret = -EOPNOTSUPP;
2143 goto cleanup;
2144 }
2145
2146 ctx.sa.assoc_num = assoc_num;
2147 ctx.sa.rx_sa = rx_sa;
182879f8 2148 ctx.secy = secy;
3cf3227a
AT		 2149
2150 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2151 if (ret)
2152 goto cleanup;
2153 }
2154
c09440f7
SD		 2155 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2156 clear_rx_sa(rx_sa);
2157
2158 rtnl_unlock();
2159
2160 return 0;
3cf3227a
AT		 2161
2162cleanup:
2163 rtnl_unlock();
2164 return ret;
c09440f7
SD		 2165}
2166
2167static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2168{
2169 struct nlattr **attrs = info->attrs;
2170 struct net_device *dev;
2171 struct macsec_secy *secy;
2172 struct macsec_rx_sc *rx_sc;
2173 sci_t sci;
2174 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a 2175 int ret;
c09440f7
SD		 2176
2177 if (!attrs[MACSEC_ATTR_IFINDEX])
2178 return -EINVAL;
2179
2180 if (parse_rxsc_config(attrs, tb_rxsc))
2181 return -EINVAL;
2182
2183 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2184 return -EINVAL;
2185
2186 rtnl_lock();
2187 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2188 if (IS_ERR(dev)) {
2189 rtnl_unlock();
2190 return PTR_ERR(dev);
2191 }
2192
2193 secy = &macsec_priv(dev)->secy;
2194 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2195
2196 rx_sc = del_rx_sc(secy, sci);
2197 if (!rx_sc) {
2198 rtnl_unlock();
2199 return -ENODEV;
2200 }
2201
3cf3227a
AT		 2202 /* If h/w offloading is available, propagate to the device */
2203 if (macsec_is_offloaded(netdev_priv(dev))) {
2204 const struct macsec_ops *ops;
2205 struct macsec_context ctx;
2206
2207 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2208 if (!ops) {
2209 ret = -EOPNOTSUPP;
2210 goto cleanup;
2211 }
2212
2213 ctx.rx_sc = rx_sc;
182879f8 2214 ctx.secy = secy;
3cf3227a
AT		 2215 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2216 if (ret)
2217 goto cleanup;
2218 }
2219
c09440f7
SD		 2220 free_rx_sc(rx_sc);
2221 rtnl_unlock();
2222
2223 return 0;
3cf3227a
AT		 2224
2225cleanup:
2226 rtnl_unlock();
2227 return ret;
c09440f7
SD		 2228}
2229
2230static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2231{
2232 struct nlattr **attrs = info->attrs;
2233 struct net_device *dev;
2234 struct macsec_secy *secy;
2235 struct macsec_tx_sc *tx_sc;
2236 struct macsec_tx_sa *tx_sa;
2237 u8 assoc_num;
2238 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2239 int ret;
c09440f7
SD		 2240
2241 if (!attrs[MACSEC_ATTR_IFINDEX])
2242 return -EINVAL;
2243
2244 if (parse_sa_config(attrs, tb_sa))
2245 return -EINVAL;
2246
2247 rtnl_lock();
2248 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2249 &dev, &secy, &tx_sc, &assoc_num);
2250 if (IS_ERR(tx_sa)) {
2251 rtnl_unlock();
2252 return PTR_ERR(tx_sa);
2253 }
2254
2255 if (tx_sa->active) {
2256 rtnl_unlock();
2257 return -EBUSY;
2258 }
2259
3cf3227a
AT		 2260 /* If h/w offloading is available, propagate to the device */
2261 if (macsec_is_offloaded(netdev_priv(dev))) {
2262 const struct macsec_ops *ops;
2263 struct macsec_context ctx;
2264
2265 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2266 if (!ops) {
2267 ret = -EOPNOTSUPP;
2268 goto cleanup;
2269 }
2270
2271 ctx.sa.assoc_num = assoc_num;
2272 ctx.sa.tx_sa = tx_sa;
182879f8 2273 ctx.secy = secy;
3cf3227a
AT		 2274
2275 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2276 if (ret)
2277 goto cleanup;
2278 }
2279
c09440f7
SD		 2280 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2281 clear_tx_sa(tx_sa);
2282
2283 rtnl_unlock();
2284
2285 return 0;
3cf3227a
AT		 2286
2287cleanup:
2288 rtnl_unlock();
2289 return ret;
c09440f7
SD		 2290}
2291
2292static bool validate_upd_sa(struct nlattr **attrs)
2293{
2294 if (!attrs[MACSEC_SA_ATTR_AN] ||
2295 attrs[MACSEC_SA_ATTR_KEY] ||
48ef50fa
EM		 2296 attrs[MACSEC_SA_ATTR_KEYID] ||
2297 attrs[MACSEC_SA_ATTR_SSCI] ||
2298 attrs[MACSEC_SA_ATTR_SALT])
c09440f7
SD		 2299 return false;
2300
2301 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2302 return false;
2303
c630d1fe 2304 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
c09440f7
SD		 2305 return false;
2306
2307 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2308 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2309 return false;
2310 }
2311
2312 return true;
2313}
2314
2315static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2316{
2317 struct nlattr **attrs = info->attrs;
2318 struct net_device *dev;
2319 struct macsec_secy *secy;
2320 struct macsec_tx_sc *tx_sc;
2321 struct macsec_tx_sa *tx_sa;
2322 u8 assoc_num;
2323 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2324 bool was_operational, was_active;
a21ecf0e 2325 pn_t prev_pn;
3cf3227a 2326 int ret = 0;
c09440f7 2327
a21ecf0e
EM		 2328 prev_pn.full64 = 0;
2329
c09440f7
SD		 2330 if (!attrs[MACSEC_ATTR_IFINDEX])
2331 return -EINVAL;
2332
2333 if (parse_sa_config(attrs, tb_sa))
2334 return -EINVAL;
2335
2336 if (!validate_upd_sa(tb_sa))
2337 return -EINVAL;
2338
2339 rtnl_lock();
2340 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2341 &dev, &secy, &tx_sc, &assoc_num);
2342 if (IS_ERR(tx_sa)) {
2343 rtnl_unlock();
2344 return PTR_ERR(tx_sa);
2345 }
2346
2347 if (tb_sa[MACSEC_SA_ATTR_PN]) {
48ef50fa
EM		 2348 int pn_len;
2349
2350 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2351 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2352 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2353 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2354 rtnl_unlock();
2355 return -EINVAL;
2356 }
2357
c09440f7 2358 spin_lock_bh(&tx_sa->lock);
a21ecf0e 2359 prev_pn = tx_sa->next_pn_halves;
48ef50fa 2360 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2361 spin_unlock_bh(&tx_sa->lock);
2362 }
2363
3cf3227a 2364 was_active = tx_sa->active;
c09440f7
SD		 2365 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2366 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2367
3cf3227a 2368 was_operational = secy->operational;
c09440f7
SD		 2369 if (assoc_num == tx_sc->encoding_sa)
2370 secy->operational = tx_sa->active;
2371
3cf3227a
AT		 2372 /* If h/w offloading is available, propagate to the device */
2373 if (macsec_is_offloaded(netdev_priv(dev))) {
2374 const struct macsec_ops *ops;
2375 struct macsec_context ctx;
2376
2377 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2378 if (!ops) {
2379 ret = -EOPNOTSUPP;
2380 goto cleanup;
2381 }
2382
2383 ctx.sa.assoc_num = assoc_num;
2384 ctx.sa.tx_sa = tx_sa;
182879f8 2385 ctx.secy = secy;
3cf3227a
AT		 2386
2387 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2388 if (ret)
2389 goto cleanup;
2390 }
2391
c09440f7
SD		 2392 rtnl_unlock();
2393
2394 return 0;
3cf3227a
AT		 2395
2396cleanup:
2397 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2398 spin_lock_bh(&tx_sa->lock);
a21ecf0e 2399 tx_sa->next_pn_halves = prev_pn;
3cf3227a
AT		 2400 spin_unlock_bh(&tx_sa->lock);
2401 }
2402 tx_sa->active = was_active;
2403 secy->operational = was_operational;
2404 rtnl_unlock();
2405 return ret;
c09440f7
SD		 2406}
2407
2408static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2409{
2410 struct nlattr **attrs = info->attrs;
2411 struct net_device *dev;
2412 struct macsec_secy *secy;
2413 struct macsec_rx_sc *rx_sc;
2414 struct macsec_rx_sa *rx_sa;
2415 u8 assoc_num;
2416 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2417 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2418 bool was_active;
a21ecf0e 2419 pn_t prev_pn;
3cf3227a 2420 int ret = 0;
c09440f7 2421
a21ecf0e
EM		 2422 prev_pn.full64 = 0;
2423
c09440f7
SD		 2424 if (!attrs[MACSEC_ATTR_IFINDEX])
2425 return -EINVAL;
2426
2427 if (parse_rxsc_config(attrs, tb_rxsc))
2428 return -EINVAL;
2429
2430 if (parse_sa_config(attrs, tb_sa))
2431 return -EINVAL;
2432
2433 if (!validate_upd_sa(tb_sa))
2434 return -EINVAL;
2435
2436 rtnl_lock();
2437 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2438 &dev, &secy, &rx_sc, &assoc_num);
2439 if (IS_ERR(rx_sa)) {
2440 rtnl_unlock();
2441 return PTR_ERR(rx_sa);
2442 }
2443
2444 if (tb_sa[MACSEC_SA_ATTR_PN]) {
48ef50fa
EM		 2445 int pn_len;
2446
2447 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2448 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2449 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2450 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2451 rtnl_unlock();
2452 return -EINVAL;
2453 }
2454
c09440f7 2455 spin_lock_bh(&rx_sa->lock);
a21ecf0e 2456 prev_pn = rx_sa->next_pn_halves;
48ef50fa 2457 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2458 spin_unlock_bh(&rx_sa->lock);
2459 }
2460
3cf3227a 2461 was_active = rx_sa->active;
c09440f7
SD		 2462 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2463 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2464
3cf3227a
AT		 2465 /* If h/w offloading is available, propagate to the device */
2466 if (macsec_is_offloaded(netdev_priv(dev))) {
2467 const struct macsec_ops *ops;
2468 struct macsec_context ctx;
2469
2470 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2471 if (!ops) {
2472 ret = -EOPNOTSUPP;
2473 goto cleanup;
2474 }
2475
2476 ctx.sa.assoc_num = assoc_num;
2477 ctx.sa.rx_sa = rx_sa;
182879f8 2478 ctx.secy = secy;
3cf3227a
AT		 2479
2480 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2481 if (ret)
2482 goto cleanup;
2483 }
2484
c09440f7
SD		 2485 rtnl_unlock();
2486 return 0;
3cf3227a
AT		 2487
2488cleanup:
2489 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2490 spin_lock_bh(&rx_sa->lock);
a21ecf0e 2491 rx_sa->next_pn_halves = prev_pn;
3cf3227a
AT		 2492 spin_unlock_bh(&rx_sa->lock);
2493 }
2494 rx_sa->active = was_active;
2495 rtnl_unlock();
2496 return ret;
c09440f7
SD		 2497}
2498
2499static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2500{
2501 struct nlattr **attrs = info->attrs;
2502 struct net_device *dev;
2503 struct macsec_secy *secy;
2504 struct macsec_rx_sc *rx_sc;
2505 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a
AT		 2506 unsigned int prev_n_rx_sc;
2507 bool was_active;
2508 int ret;
c09440f7
SD		 2509
2510 if (!attrs[MACSEC_ATTR_IFINDEX])
2511 return -EINVAL;
2512
2513 if (parse_rxsc_config(attrs, tb_rxsc))
2514 return -EINVAL;
2515
2516 if (!validate_add_rxsc(tb_rxsc))
2517 return -EINVAL;
2518
2519 rtnl_lock();
2520 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2521 if (IS_ERR(rx_sc)) {
2522 rtnl_unlock();
2523 return PTR_ERR(rx_sc);
2524 }
2525
3cf3227a
AT		 2526 was_active = rx_sc->active;
2527 prev_n_rx_sc = secy->n_rx_sc;
c09440f7
SD		 2528 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2529 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2530
2531 if (rx_sc->active != new)
2532 secy->n_rx_sc += new ? 1 : -1;
2533
2534 rx_sc->active = new;
2535 }
2536
3cf3227a
AT		 2537 /* If h/w offloading is available, propagate to the device */
2538 if (macsec_is_offloaded(netdev_priv(dev))) {
2539 const struct macsec_ops *ops;
2540 struct macsec_context ctx;
2541
2542 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2543 if (!ops) {
2544 ret = -EOPNOTSUPP;
2545 goto cleanup;
2546 }
2547
2548 ctx.rx_sc = rx_sc;
182879f8 2549 ctx.secy = secy;
3cf3227a
AT		 2550
2551 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2552 if (ret)
2553 goto cleanup;
2554 }
2555
c09440f7
SD		 2556 rtnl_unlock();
2557
2558 return 0;
3cf3227a
AT		 2559
2560cleanup:
2561 secy->n_rx_sc = prev_n_rx_sc;
2562 rx_sc->active = was_active;
2563 rtnl_unlock();
2564 return ret;
c09440f7
SD		 2565}
2566
dcb780fb
AT		 2567static bool macsec_is_configured(struct macsec_dev *macsec)
2568{
2569 struct macsec_secy *secy = &macsec->secy;
2570 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2571 int i;
2572
2573 if (secy->n_rx_sc > 0)
2574 return true;
2575
2576 for (i = 0; i < MACSEC_NUM_AN; i++)
2577 if (tx_sc->sa[i])
2578 return true;
2579
2580 return false;
2581}
2582
2583static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2584{
2585 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2586 enum macsec_offload offload, prev_offload;
2587 int (*func)(struct macsec_context *ctx);
2588 struct nlattr **attrs = info->attrs;
a249f805 2589 struct net_device *dev;
dcb780fb
AT		 2590 const struct macsec_ops *ops;
2591 struct macsec_context ctx;
2592 struct macsec_dev *macsec;
dcb780fb
AT		 2593 int ret;
2594
2595 if (!attrs[MACSEC_ATTR_IFINDEX])
2596 return -EINVAL;
2597
2598 if (!attrs[MACSEC_ATTR_OFFLOAD])
2599 return -EINVAL;
2600
2601 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2602 attrs[MACSEC_ATTR_OFFLOAD],
2603 macsec_genl_offload_policy, NULL))
2604 return -EINVAL;
2605
2606 dev = get_dev_from_nl(genl_info_net(info), attrs);
2607 if (IS_ERR(dev))
2608 return PTR_ERR(dev);
2609 macsec = macsec_priv(dev);
2610
aa81700c
DC		 2611 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2612 return -EINVAL;
2613
dcb780fb
AT		 2614 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2615 if (macsec->offload == offload)
2616 return 0;
2617
2618 /* Check if the offloading mode is supported by the underlying layers */
2619 if (offload != MACSEC_OFFLOAD_OFF &&
2620 !macsec_check_offload(offload, macsec))
2621 return -EOPNOTSUPP;
2622
dcb780fb
AT		 2623 /* Check if the net device is busy. */
2624 if (netif_running(dev))
2625 return -EBUSY;
2626
2627 rtnl_lock();
2628
2629 prev_offload = macsec->offload;
2630 macsec->offload = offload;
2631
2632 /* Check if the device already has rules configured: we do not support
2633 * rules migration.
2634 */
2635 if (macsec_is_configured(macsec)) {
2636 ret = -EBUSY;
2637 goto rollback;
2638 }
2639
2640 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2641 macsec, &ctx);
2642 if (!ops) {
2643 ret = -EOPNOTSUPP;
2644 goto rollback;
2645 }
2646
2647 if (prev_offload == MACSEC_OFFLOAD_OFF)
2648 func = ops->mdo_add_secy;
2649 else
2650 func = ops->mdo_del_secy;
2651
2652 ctx.secy = &macsec->secy;
2653 ret = macsec_offload(func, &ctx);
2654 if (ret)
2655 goto rollback;
2656
29ca3cdf 2657 rtnl_unlock();
dcb780fb
AT		 2658 return 0;
2659
2660rollback:
2661 macsec->offload = prev_offload;
2662
2663 rtnl_unlock();
2664 return ret;
2665}
2666
b62c3624
DB		 2667static void get_tx_sa_stats(struct net_device *dev, int an,
2668 struct macsec_tx_sa *tx_sa,
2669 struct macsec_tx_sa_stats *sum)
c09440f7 2670{
b62c3624 2671 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2672 int cpu;
2673
b62c3624
DB		 2674 /* If h/w offloading is available, propagate to the device */
2675 if (macsec_is_offloaded(macsec)) {
2676 const struct macsec_ops *ops;
2677 struct macsec_context ctx;
2678
2679 ops = macsec_get_ops(macsec, &ctx);
2680 if (ops) {
2681 ctx.sa.assoc_num = an;
2682 ctx.sa.tx_sa = tx_sa;
2683 ctx.stats.tx_sa_stats = sum;
2684 ctx.secy = &macsec_priv(dev)->secy;
2685 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2686 }
2687 return;
2688 }
2689
c09440f7 2690 for_each_possible_cpu(cpu) {
b62c3624
DB		 2691 const struct macsec_tx_sa_stats *stats =
2692 per_cpu_ptr(tx_sa->stats, cpu);
c09440f7 2693
b62c3624
DB		 2694 sum->OutPktsProtected += stats->OutPktsProtected;
2695 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
c09440f7 2696 }
b62c3624 2697}
c09440f7 2698
b62c3624
DB		 2699static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2700{
2701 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2702 sum->OutPktsProtected) ||
2703 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2704 sum->OutPktsEncrypted))
c09440f7
SD		 2705 return -EMSGSIZE;
2706
2707 return 0;
2708}
2709
b62c3624
DB		 2710static void get_rx_sa_stats(struct net_device *dev,
2711 struct macsec_rx_sc *rx_sc, int an,
2712 struct macsec_rx_sa *rx_sa,
2713 struct macsec_rx_sa_stats *sum)
c09440f7 2714{
b62c3624 2715 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2716 int cpu;
2717
b62c3624
DB		 2718 /* If h/w offloading is available, propagate to the device */
2719 if (macsec_is_offloaded(macsec)) {
2720 const struct macsec_ops *ops;
2721 struct macsec_context ctx;
2722
2723 ops = macsec_get_ops(macsec, &ctx);
2724 if (ops) {
2725 ctx.sa.assoc_num = an;
2726 ctx.sa.rx_sa = rx_sa;
2727 ctx.stats.rx_sa_stats = sum;
2728 ctx.secy = &macsec_priv(dev)->secy;
2729 ctx.rx_sc = rx_sc;
2730 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2731 }
2732 return;
2733 }
2734
c09440f7 2735 for_each_possible_cpu(cpu) {
b62c3624
DB		 2736 const struct macsec_rx_sa_stats *stats =
2737 per_cpu_ptr(rx_sa->stats, cpu);
c09440f7 2738
b62c3624
DB		 2739 sum->InPktsOK += stats->InPktsOK;
2740 sum->InPktsInvalid += stats->InPktsInvalid;
2741 sum->InPktsNotValid += stats->InPktsNotValid;
2742 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2743 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
c09440f7 2744 }
b62c3624 2745}
c09440f7 2746
b62c3624
DB		 2747static int copy_rx_sa_stats(struct sk_buff *skb,
2748 struct macsec_rx_sa_stats *sum)
2749{
2750 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2751 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2752 sum->InPktsInvalid) ||
2753 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2754 sum->InPktsNotValid) ||
2755 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2756 sum->InPktsNotUsingSA) ||
2757 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2758 sum->InPktsUnusedSA))
c09440f7
SD		 2759 return -EMSGSIZE;
2760
2761 return 0;
2762}
2763
b62c3624
DB		 2764static void get_rx_sc_stats(struct net_device *dev,
2765 struct macsec_rx_sc *rx_sc,
2766 struct macsec_rx_sc_stats *sum)
c09440f7 2767{
b62c3624 2768 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2769 int cpu;
2770
b62c3624
DB		 2771 /* If h/w offloading is available, propagate to the device */
2772 if (macsec_is_offloaded(macsec)) {
2773 const struct macsec_ops *ops;
2774 struct macsec_context ctx;
2775
2776 ops = macsec_get_ops(macsec, &ctx);
2777 if (ops) {
2778 ctx.stats.rx_sc_stats = sum;
2779 ctx.secy = &macsec_priv(dev)->secy;
2780 ctx.rx_sc = rx_sc;
2781 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2782 }
2783 return;
2784 }
2785
c09440f7
SD		 2786 for_each_possible_cpu(cpu) {
2787 const struct pcpu_rx_sc_stats *stats;
2788 struct macsec_rx_sc_stats tmp;
2789 unsigned int start;
2790
b62c3624 2791 stats = per_cpu_ptr(rx_sc->stats, cpu);
c09440f7
SD		 2792 do {
2793 start = u64_stats_fetch_begin_irq(&stats->syncp);
2794 memcpy(&tmp, &stats->stats, sizeof(tmp));
2795 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2796
b62c3624
DB		 2797 sum->InOctetsValidated += tmp.InOctetsValidated;
2798 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2799 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2800 sum->InPktsDelayed += tmp.InPktsDelayed;
2801 sum->InPktsOK += tmp.InPktsOK;
2802 sum->InPktsInvalid += tmp.InPktsInvalid;
2803 sum->InPktsLate += tmp.InPktsLate;
2804 sum->InPktsNotValid += tmp.InPktsNotValid;
2805 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2806 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
c09440f7 2807 }
b62c3624 2808}
c09440f7 2809
b62c3624
DB		 2810static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2811{
f60d94c0 2812 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
b62c3624 2813 sum->InOctetsValidated,
f60d94c0
ND		 2814 MACSEC_RXSC_STATS_ATTR_PAD) ||
2815 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
b62c3624 2816 sum->InOctetsDecrypted,
f60d94c0
ND		 2817 MACSEC_RXSC_STATS_ATTR_PAD) ||
2818 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
b62c3624 2819 sum->InPktsUnchecked,
f60d94c0
ND		 2820 MACSEC_RXSC_STATS_ATTR_PAD) ||
2821 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
b62c3624 2822 sum->InPktsDelayed,
f60d94c0
ND		 2823 MACSEC_RXSC_STATS_ATTR_PAD) ||
2824 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
b62c3624 2825 sum->InPktsOK,
f60d94c0
ND		 2826 MACSEC_RXSC_STATS_ATTR_PAD) ||
2827 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
b62c3624 2828 sum->InPktsInvalid,
f60d94c0
ND		 2829 MACSEC_RXSC_STATS_ATTR_PAD) ||
2830 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
b62c3624 2831 sum->InPktsLate,
f60d94c0
ND		 2832 MACSEC_RXSC_STATS_ATTR_PAD) ||
2833 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
b62c3624 2834 sum->InPktsNotValid,
f60d94c0
ND		 2835 MACSEC_RXSC_STATS_ATTR_PAD) ||
2836 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
b62c3624 2837 sum->InPktsNotUsingSA,
f60d94c0
ND		 2838 MACSEC_RXSC_STATS_ATTR_PAD) ||
2839 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
b62c3624 2840 sum->InPktsUnusedSA,
f60d94c0 2841 MACSEC_RXSC_STATS_ATTR_PAD))
c09440f7
SD		 2842 return -EMSGSIZE;
2843
2844 return 0;
2845}
2846
b62c3624
DB		 2847static void get_tx_sc_stats(struct net_device *dev,
2848 struct macsec_tx_sc_stats *sum)
c09440f7 2849{
b62c3624 2850 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2851 int cpu;
2852
b62c3624
DB		 2853 /* If h/w offloading is available, propagate to the device */
2854 if (macsec_is_offloaded(macsec)) {
2855 const struct macsec_ops *ops;
2856 struct macsec_context ctx;
2857
2858 ops = macsec_get_ops(macsec, &ctx);
2859 if (ops) {
2860 ctx.stats.tx_sc_stats = sum;
2861 ctx.secy = &macsec_priv(dev)->secy;
2862 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2863 }
2864 return;
2865 }
2866
c09440f7
SD		 2867 for_each_possible_cpu(cpu) {
2868 const struct pcpu_tx_sc_stats *stats;
2869 struct macsec_tx_sc_stats tmp;
2870 unsigned int start;
2871
b62c3624 2872 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
c09440f7
SD		 2873 do {
2874 start = u64_stats_fetch_begin_irq(&stats->syncp);
2875 memcpy(&tmp, &stats->stats, sizeof(tmp));
2876 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2877
b62c3624
DB		 2878 sum->OutPktsProtected += tmp.OutPktsProtected;
2879 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2880 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2881 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
c09440f7 2882 }
b62c3624 2883}
c09440f7 2884
b62c3624
DB		 2885static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2886{
f60d94c0 2887 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
b62c3624 2888 sum->OutPktsProtected,
f60d94c0
ND		 2889 MACSEC_TXSC_STATS_ATTR_PAD) ||
2890 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
b62c3624 2891 sum->OutPktsEncrypted,
f60d94c0
ND		 2892 MACSEC_TXSC_STATS_ATTR_PAD) ||
2893 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
b62c3624 2894 sum->OutOctetsProtected,
f60d94c0
ND		 2895 MACSEC_TXSC_STATS_ATTR_PAD) ||
2896 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
b62c3624 2897 sum->OutOctetsEncrypted,
f60d94c0 2898 MACSEC_TXSC_STATS_ATTR_PAD))
c09440f7
SD		 2899 return -EMSGSIZE;
2900
2901 return 0;
2902}
2903
b62c3624 2904static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
c09440f7 2905{
b62c3624 2906 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 2907 int cpu;
2908
b62c3624
DB		 2909 /* If h/w offloading is available, propagate to the device */
2910 if (macsec_is_offloaded(macsec)) {
2911 const struct macsec_ops *ops;
2912 struct macsec_context ctx;
2913
2914 ops = macsec_get_ops(macsec, &ctx);
2915 if (ops) {
2916 ctx.stats.dev_stats = sum;
2917 ctx.secy = &macsec_priv(dev)->secy;
2918 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2919 }
2920 return;
2921 }
2922
c09440f7
SD		 2923 for_each_possible_cpu(cpu) {
2924 const struct pcpu_secy_stats *stats;
2925 struct macsec_dev_stats tmp;
2926 unsigned int start;
2927
b62c3624 2928 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
c09440f7
SD		 2929 do {
2930 start = u64_stats_fetch_begin_irq(&stats->syncp);
2931 memcpy(&tmp, &stats->stats, sizeof(tmp));
2932 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2933
b62c3624
DB		 2934 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2935 sum->InPktsUntagged += tmp.InPktsUntagged;
2936 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2937 sum->InPktsNoTag += tmp.InPktsNoTag;
2938 sum->InPktsBadTag += tmp.InPktsBadTag;
2939 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2940 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2941 sum->InPktsOverrun += tmp.InPktsOverrun;
c09440f7 2942 }
b62c3624 2943}
c09440f7 2944
b62c3624
DB		 2945static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2946{
f60d94c0 2947 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
b62c3624 2948 sum->OutPktsUntagged,
f60d94c0
ND		 2949 MACSEC_SECY_STATS_ATTR_PAD) ||
2950 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
b62c3624 2951 sum->InPktsUntagged,
f60d94c0
ND		 2952 MACSEC_SECY_STATS_ATTR_PAD) ||
2953 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
b62c3624 2954 sum->OutPktsTooLong,
f60d94c0
ND		 2955 MACSEC_SECY_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
b62c3624 2957 sum->InPktsNoTag,
f60d94c0
ND		 2958 MACSEC_SECY_STATS_ATTR_PAD) ||
2959 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
b62c3624 2960 sum->InPktsBadTag,
f60d94c0
ND		 2961 MACSEC_SECY_STATS_ATTR_PAD) ||
2962 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
b62c3624 2963 sum->InPktsUnknownSCI,
f60d94c0
ND		 2964 MACSEC_SECY_STATS_ATTR_PAD) ||
2965 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
b62c3624 2966 sum->InPktsNoSCI,
f60d94c0
ND		 2967 MACSEC_SECY_STATS_ATTR_PAD) ||
2968 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
b62c3624 2969 sum->InPktsOverrun,
f60d94c0 2970 MACSEC_SECY_STATS_ATTR_PAD))
c09440f7
SD		 2971 return -EMSGSIZE;
2972
2973 return 0;
2974}
2975
2976static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2977{
2978 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ae0be8de
MK		 2979 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2980 MACSEC_ATTR_SECY);
ccfdec90 2981 u64 csid;
c09440f7
SD		 2982
2983 if (!secy_nest)
2984 return 1;
2985
ccfdec90
FW		 2986 switch (secy->key_len) {
2987 case MACSEC_GCM_AES_128_SAK_LEN:
48ef50fa 2988 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 2989 break;
2990 case MACSEC_GCM_AES_256_SAK_LEN:
48ef50fa 2991 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
ccfdec90
FW		 2992 break;
2993 default:
2994 goto cancel;
2995 }
2996
f60d94c0
ND		 2997 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2998 MACSEC_SECY_ATTR_PAD) ||
2999 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
ccfdec90 3000 csid, MACSEC_SECY_ATTR_PAD) ||
c09440f7
SD		 3001 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3002 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3003 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3007 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3008 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3009 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3010 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3011 goto cancel;
3012
3013 if (secy->replay_protect) {
3014 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3015 goto cancel;
3016 }
3017
3018 nla_nest_end(skb, secy_nest);
3019 return 0;
3020
3021cancel:
3022 nla_nest_cancel(skb, secy_nest);
3023 return 1;
3024}
3025
e1427237
FW		 3026static noinline_for_stack int
3027dump_secy(struct macsec_secy *secy, struct net_device *dev,
3028 struct sk_buff *skb, struct netlink_callback *cb)
c09440f7 3029{
b62c3624
DB		 3030 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3031 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3032 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3033 struct macsec_rx_sa_stats rx_sa_stats = {0, };
dcb780fb 3034 struct macsec_dev *macsec = netdev_priv(dev);
b62c3624 3035 struct macsec_dev_stats dev_stats = {0, };
c09440f7
SD		 3036 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3037 struct nlattr *txsa_list, *rxsc_list;
dcb780fb 3038 struct macsec_rx_sc *rx_sc;
c09440f7 3039 struct nlattr *attr;
dcb780fb
AT		 3040 void *hdr;
3041 int i, j;
c09440f7
SD		 3042
3043 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3044 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3045 if (!hdr)
3046 return -EMSGSIZE;
3047
0a833c29 3048 genl_dump_check_consistent(cb, hdr);
c09440f7
SD		 3049
3050 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3051 goto nla_put_failure;
3052
dcb780fb
AT		 3053 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3054 if (!attr)
3055 goto nla_put_failure;
3056 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3057 goto nla_put_failure;
3058 nla_nest_end(skb, attr);
3059
c09440f7
SD		 3060 if (nla_put_secy(secy, skb))
3061 goto nla_put_failure;
3062
ae0be8de 3063 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
c09440f7
SD		 3064 if (!attr)
3065 goto nla_put_failure;
b62c3624
DB		 3066
3067 get_tx_sc_stats(dev, &tx_sc_stats);
3068 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
c09440f7
SD		 3069 nla_nest_cancel(skb, attr);
3070 goto nla_put_failure;
3071 }
3072 nla_nest_end(skb, attr);
3073
ae0be8de 3074 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
c09440f7
SD		 3075 if (!attr)
3076 goto nla_put_failure;
b62c3624
DB		 3077 get_secy_stats(dev, &dev_stats);
3078 if (copy_secy_stats(skb, &dev_stats)) {
c09440f7
SD		 3079 nla_nest_cancel(skb, attr);
3080 goto nla_put_failure;
3081 }
3082 nla_nest_end(skb, attr);
3083
ae0be8de 3084 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
c09440f7
SD		 3085 if (!txsa_list)
3086 goto nla_put_failure;
3087 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3088 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3089 struct nlattr *txsa_nest;
48ef50fa
EM		 3090 u64 pn;
3091 int pn_len;
c09440f7
SD		 3092
3093 if (!tx_sa)
3094 continue;
3095
ae0be8de 3096 txsa_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 3097 if (!txsa_nest) {
3098 nla_nest_cancel(skb, txsa_list);
3099 goto nla_put_failure;
3100 }
3101
b62c3624
DB		 3102 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3103 if (!attr) {
3104 nla_nest_cancel(skb, txsa_nest);
3105 nla_nest_cancel(skb, txsa_list);
3106 goto nla_put_failure;
3107 }
3108 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3109 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3110 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3111 nla_nest_cancel(skb, attr);
3112 nla_nest_cancel(skb, txsa_nest);
3113 nla_nest_cancel(skb, txsa_list);
3114 goto nla_put_failure;
3115 }
3116 nla_nest_end(skb, attr);
3117
48ef50fa
EM		 3118 if (secy->xpn) {
3119 pn = tx_sa->next_pn;
3120 pn_len = MACSEC_XPN_PN_LEN;
3121 } else {
3122 pn = tx_sa->next_pn_halves.lower;
3123 pn_len = MACSEC_DEFAULT_PN_LEN;
3124 }
3125
c09440f7 3126 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
48ef50fa 3127 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
8acca6ac 3128 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
48ef50fa 3129 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
c09440f7
SD		 3130 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3131 nla_nest_cancel(skb, txsa_nest);
3132 nla_nest_cancel(skb, txsa_list);
3133 goto nla_put_failure;
3134 }
3135
c09440f7
SD		 3136 nla_nest_end(skb, txsa_nest);
3137 }
3138 nla_nest_end(skb, txsa_list);
3139
ae0be8de 3140 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
c09440f7
SD		 3141 if (!rxsc_list)
3142 goto nla_put_failure;
3143
3144 j = 1;
3145 for_each_rxsc_rtnl(secy, rx_sc) {
3146 int k;
3147 struct nlattr *rxsa_list;
ae0be8de 3148 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 3149
3150 if (!rxsc_nest) {
3151 nla_nest_cancel(skb, rxsc_list);
3152 goto nla_put_failure;
3153 }
3154
3155 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
f60d94c0
ND		 3156 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3157 MACSEC_RXSC_ATTR_PAD)) {
c09440f7
SD		 3158 nla_nest_cancel(skb, rxsc_nest);
3159 nla_nest_cancel(skb, rxsc_list);
3160 goto nla_put_failure;
3161 }
3162
ae0be8de 3163 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
c09440f7
SD		 3164 if (!attr) {
3165 nla_nest_cancel(skb, rxsc_nest);
3166 nla_nest_cancel(skb, rxsc_list);
3167 goto nla_put_failure;
3168 }
b62c3624
DB		 3169 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3170 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3171 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
c09440f7
SD		 3172 nla_nest_cancel(skb, attr);
3173 nla_nest_cancel(skb, rxsc_nest);
3174 nla_nest_cancel(skb, rxsc_list);
3175 goto nla_put_failure;
3176 }
3177 nla_nest_end(skb, attr);
3178
ae0be8de
MK		 3179 rxsa_list = nla_nest_start_noflag(skb,
3180 MACSEC_RXSC_ATTR_SA_LIST);
c09440f7
SD		 3181 if (!rxsa_list) {
3182 nla_nest_cancel(skb, rxsc_nest);
3183 nla_nest_cancel(skb, rxsc_list);
3184 goto nla_put_failure;
3185 }
3186
3187 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3188 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3189 struct nlattr *rxsa_nest;
48ef50fa
EM		 3190 u64 pn;
3191 int pn_len;
c09440f7
SD		 3192
3193 if (!rx_sa)
3194 continue;
3195
ae0be8de 3196 rxsa_nest = nla_nest_start_noflag(skb, k++);
c09440f7
SD		 3197 if (!rxsa_nest) {
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
ae0be8de
MK		 3204 attr = nla_nest_start_noflag(skb,
3205 MACSEC_SA_ATTR_STATS);
c09440f7
SD		 3206 if (!attr) {
3207 nla_nest_cancel(skb, rxsa_list);
3208 nla_nest_cancel(skb, rxsc_nest);
3209 nla_nest_cancel(skb, rxsc_list);
3210 goto nla_put_failure;
3211 }
b62c3624
DB		 3212 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3213 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3214 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
c09440f7
SD		 3215 nla_nest_cancel(skb, attr);
3216 nla_nest_cancel(skb, rxsa_list);
3217 nla_nest_cancel(skb, rxsc_nest);
3218 nla_nest_cancel(skb, rxsc_list);
3219 goto nla_put_failure;
3220 }
3221 nla_nest_end(skb, attr);
3222
48ef50fa
EM		 3223 if (secy->xpn) {
3224 pn = rx_sa->next_pn;
3225 pn_len = MACSEC_XPN_PN_LEN;
3226 } else {
3227 pn = rx_sa->next_pn_halves.lower;
3228 pn_len = MACSEC_DEFAULT_PN_LEN;
3229 }
3230
c09440f7 3231 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
48ef50fa 3232 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
8acca6ac 3233 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
48ef50fa 3234 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
c09440f7
SD		 3235 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3236 nla_nest_cancel(skb, rxsa_nest);
3237 nla_nest_cancel(skb, rxsc_nest);
3238 nla_nest_cancel(skb, rxsc_list);
3239 goto nla_put_failure;
3240 }
3241 nla_nest_end(skb, rxsa_nest);
3242 }
3243
3244 nla_nest_end(skb, rxsa_list);
3245 nla_nest_end(skb, rxsc_nest);
3246 }
3247
3248 nla_nest_end(skb, rxsc_list);
3249
c09440f7
SD		 3250 genlmsg_end(skb, hdr);
3251
3252 return 0;
3253
3254nla_put_failure:
c09440f7
SD		 3255 genlmsg_cancel(skb, hdr);
3256 return -EMSGSIZE;
3257}
3258
96cfc505
SD		 3259static int macsec_generation = 1; /* protected by RTNL */
3260
c09440f7
SD		 3261static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3262{
3263 struct net *net = sock_net(skb->sk);
3264 struct net_device *dev;
3265 int dev_idx, d;
3266
3267 dev_idx = cb->args[0];
3268
3269 d = 0;
c10c63ea 3270 rtnl_lock();
96cfc505
SD		 3271
3272 cb->seq = macsec_generation;
3273
c09440f7
SD		 3274 for_each_netdev(net, dev) {
3275 struct macsec_secy *secy;
3276
3277 if (d < dev_idx)
3278 goto next;
3279
3280 if (!netif_is_macsec(dev))
3281 goto next;
3282
3283 secy = &macsec_priv(dev)->secy;
3284 if (dump_secy(secy, dev, skb, cb) < 0)
3285 goto done;
3286next:
3287 d++;
3288 }
3289
3290done:
c10c63ea 3291 rtnl_unlock();
c09440f7
SD		 3292 cb->args[0] = d;
3293 return skb->len;
3294}
3295
66a9b928 3296static const struct genl_small_ops macsec_genl_ops[] = {
c09440f7
SD		 3297 {
3298 .cmd = MACSEC_CMD_GET_TXSC,
ef6243ac 3299 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3300 .dumpit = macsec_dump_txsc,
c09440f7
SD		 3301 },
3302 {
3303 .cmd = MACSEC_CMD_ADD_RXSC,
ef6243ac 3304 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3305 .doit = macsec_add_rxsc,
c09440f7
SD		 3306 .flags = GENL_ADMIN_PERM,
3307 },
3308 {
3309 .cmd = MACSEC_CMD_DEL_RXSC,
ef6243ac 3310 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3311 .doit = macsec_del_rxsc,
c09440f7
SD		 3312 .flags = GENL_ADMIN_PERM,
3313 },
3314 {
3315 .cmd = MACSEC_CMD_UPD_RXSC,
ef6243ac 3316 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3317 .doit = macsec_upd_rxsc,
c09440f7
SD		 3318 .flags = GENL_ADMIN_PERM,
3319 },
3320 {
3321 .cmd = MACSEC_CMD_ADD_TXSA,
ef6243ac 3322 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3323 .doit = macsec_add_txsa,
c09440f7
SD		 3324 .flags = GENL_ADMIN_PERM,
3325 },
3326 {
3327 .cmd = MACSEC_CMD_DEL_TXSA,
ef6243ac 3328 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3329 .doit = macsec_del_txsa,
c09440f7
SD		 3330 .flags = GENL_ADMIN_PERM,
3331 },
3332 {
3333 .cmd = MACSEC_CMD_UPD_TXSA,
ef6243ac 3334 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3335 .doit = macsec_upd_txsa,
c09440f7
SD		 3336 .flags = GENL_ADMIN_PERM,
3337 },
3338 {
3339 .cmd = MACSEC_CMD_ADD_RXSA,
ef6243ac 3340 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3341 .doit = macsec_add_rxsa,
c09440f7
SD		 3342 .flags = GENL_ADMIN_PERM,
3343 },
3344 {
3345 .cmd = MACSEC_CMD_DEL_RXSA,
ef6243ac 3346 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3347 .doit = macsec_del_rxsa,
c09440f7
SD		 3348 .flags = GENL_ADMIN_PERM,
3349 },
3350 {
3351 .cmd = MACSEC_CMD_UPD_RXSA,
ef6243ac 3352 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3353 .doit = macsec_upd_rxsa,
c09440f7
SD		 3354 .flags = GENL_ADMIN_PERM,
3355 },
dcb780fb
AT		 3356 {
3357 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3358 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3359 .doit = macsec_upd_offload,
3360 .flags = GENL_ADMIN_PERM,
3361 },
c09440f7
SD		 3362};
3363
56989f6d 3364static struct genl_family macsec_fam __ro_after_init = {
489111e5
JB		 3365 .name = MACSEC_GENL_NAME,
3366 .hdrsize = 0,
3367 .version = MACSEC_GENL_VERSION,
3368 .maxattr = MACSEC_ATTR_MAX,
3b0f31f2 3369 .policy = macsec_genl_policy,
489111e5
JB		 3370 .netnsok = true,
3371 .module = THIS_MODULE,
66a9b928
JK		 3372 .small_ops = macsec_genl_ops,
3373 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
9c5d03d3 3374 .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1,
489111e5
JB		 3375};
3376
c09440f7
SD		 3377static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3378 struct net_device *dev)
3379{
3380 struct macsec_dev *macsec = netdev_priv(dev);
3381 struct macsec_secy *secy = &macsec->secy;
3382 struct pcpu_secy_stats *secy_stats;
3383 int ret, len;
3384
3cf3227a 3385 if (macsec_is_offloaded(netdev_priv(dev))) {
0a28bfd4
LN		 3386 struct metadata_dst *md_dst = secy->tx_sc.md_dst;
3387
3388 skb_dst_drop(skb);
3389 dst_hold(&md_dst->dst);
3390 skb_dst_set(skb, &md_dst->dst);
3cf3227a
AT		 3391 skb->dev = macsec->real_dev;
3392 return dev_queue_xmit(skb);
3393 }
3394
c09440f7
SD		 3395 /* 10.5 */
3396 if (!secy->protect_frames) {
3397 secy_stats = this_cpu_ptr(macsec->stats);
3398 u64_stats_update_begin(&secy_stats->syncp);
3399 secy_stats->stats.OutPktsUntagged++;
3400 u64_stats_update_end(&secy_stats->syncp);
79c62220 3401 skb->dev = macsec->real_dev;
c09440f7
SD		 3402 len = skb->len;
3403 ret = dev_queue_xmit(skb);
3404 count_tx(dev, ret, len);
3405 return ret;
3406 }
3407
3408 if (!secy->operational) {
3409 kfree_skb(skb);
3410 dev->stats.tx_dropped++;
3411 return NETDEV_TX_OK;
3412 }
3413
91ec9bd5 3414 len = skb->len;
c09440f7
SD		 3415 skb = macsec_encrypt(skb, dev);
3416 if (IS_ERR(skb)) {
3417 if (PTR_ERR(skb) != -EINPROGRESS)
3418 dev->stats.tx_dropped++;
3419 return NETDEV_TX_OK;
3420 }
3421
3422 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3423
3424 macsec_encrypt_finish(skb, dev);
c09440f7
SD		 3425 ret = dev_queue_xmit(skb);
3426 count_tx(dev, ret, len);
3427 return ret;
3428}
3429
8bcd560a 3430#define MACSEC_FEATURES \
c09440f7 3431 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
e2003872 3432
c09440f7
SD		 3433static int macsec_dev_init(struct net_device *dev)
3434{
3435 struct macsec_dev *macsec = macsec_priv(dev);
3436 struct net_device *real_dev = macsec->real_dev;
5491e7c6 3437 int err;
c09440f7
SD		 3438
3439 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3440 if (!dev->tstats)
3441 return -ENOMEM;
3442
5491e7c6
PA		 3443 err = gro_cells_init(&macsec->gro_cells, dev);
3444 if (err) {
3445 free_percpu(dev->tstats);
3446 return err;
3447 }
3448
8bcd560a
SD		 3449 dev->features = real_dev->features & MACSEC_FEATURES;
3450 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
c09440f7
SD		 3451
3452 dev->needed_headroom = real_dev->needed_headroom +
3453 MACSEC_NEEDED_HEADROOM;
3454 dev->needed_tailroom = real_dev->needed_tailroom +
3455 MACSEC_NEEDED_TAILROOM;
3456
3457 if (is_zero_ether_addr(dev->dev_addr))
3458 eth_hw_addr_inherit(dev, real_dev);
3459 if (is_zero_ether_addr(dev->broadcast))
3460 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3461
196a888c 3462 /* Get macsec's reference to real_dev */
d62607c3 3463 netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL);
196a888c 3464
c09440f7
SD		 3465 return 0;
3466}
3467
3468static void macsec_dev_uninit(struct net_device *dev)
3469{
5491e7c6
PA		 3470 struct macsec_dev *macsec = macsec_priv(dev);
3471
3472 gro_cells_destroy(&macsec->gro_cells);
c09440f7
SD		 3473 free_percpu(dev->tstats);
3474}
3475
3476static netdev_features_t macsec_fix_features(struct net_device *dev,
3477 netdev_features_t features)
3478{
3479 struct macsec_dev *macsec = macsec_priv(dev);
3480 struct net_device *real_dev = macsec->real_dev;
3481
8bcd560a 3482 features &= (real_dev->features & MACSEC_FEATURES) |
5491e7c6
PA		 3483 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3484 features |= NETIF_F_LLTX;
c09440f7
SD		 3485
3486 return features;
3487}
3488
3489static int macsec_dev_open(struct net_device *dev)
3490{
3491 struct macsec_dev *macsec = macsec_priv(dev);
3492 struct net_device *real_dev = macsec->real_dev;
3493 int err;
3494
c09440f7
SD		 3495 err = dev_uc_add(real_dev, dev->dev_addr);
3496 if (err < 0)
3497 return err;
3498
3499 if (dev->flags & IFF_ALLMULTI) {
3500 err = dev_set_allmulti(real_dev, 1);
3501 if (err < 0)
3502 goto del_unicast;
3503 }
3504
3505 if (dev->flags & IFF_PROMISC) {
3506 err = dev_set_promiscuity(real_dev, 1);
3507 if (err < 0)
3508 goto clear_allmulti;
3509 }
3510
3cf3227a
AT		 3511 /* If h/w offloading is available, propagate to the device */
3512 if (macsec_is_offloaded(macsec)) {
3513 const struct macsec_ops *ops;
3514 struct macsec_context ctx;
3515
3516 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3517 if (!ops) {
3518 err = -EOPNOTSUPP;
3519 goto clear_allmulti;
3520 }
3521
182879f8 3522 ctx.secy = &macsec->secy;
3cf3227a
AT		 3523 err = macsec_offload(ops->mdo_dev_open, &ctx);
3524 if (err)
3525 goto clear_allmulti;
3526 }
3527
c09440f7
SD		 3528 if (netif_carrier_ok(real_dev))
3529 netif_carrier_on(dev);
3530
3531 return 0;
3532clear_allmulti:
3533 if (dev->flags & IFF_ALLMULTI)
3534 dev_set_allmulti(real_dev, -1);
3535del_unicast:
3536 dev_uc_del(real_dev, dev->dev_addr);
3537 netif_carrier_off(dev);
3538 return err;
3539}
3540
3541static int macsec_dev_stop(struct net_device *dev)
3542{
3543 struct macsec_dev *macsec = macsec_priv(dev);
3544 struct net_device *real_dev = macsec->real_dev;
3545
3546 netif_carrier_off(dev);
3547
3cf3227a
AT		 3548 /* If h/w offloading is available, propagate to the device */
3549 if (macsec_is_offloaded(macsec)) {
3550 const struct macsec_ops *ops;
3551 struct macsec_context ctx;
3552
3553 ops = macsec_get_ops(macsec, &ctx);
182879f8
DB		 3554 if (ops) {
3555 ctx.secy = &macsec->secy;
3cf3227a 3556 macsec_offload(ops->mdo_dev_stop, &ctx);
182879f8 3557 }
3cf3227a
AT		 3558 }
3559
c09440f7
SD		 3560 dev_mc_unsync(real_dev, dev);
3561 dev_uc_unsync(real_dev, dev);
3562
3563 if (dev->flags & IFF_ALLMULTI)
3564 dev_set_allmulti(real_dev, -1);
3565
3566 if (dev->flags & IFF_PROMISC)
3567 dev_set_promiscuity(real_dev, -1);
3568
3569 dev_uc_del(real_dev, dev->dev_addr);
3570
3571 return 0;
3572}
3573
3574static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3575{
3576 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3577
3578 if (!(dev->flags & IFF_UP))
3579 return;
3580
3581 if (change & IFF_ALLMULTI)
3582 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3583
3584 if (change & IFF_PROMISC)
3585 dev_set_promiscuity(real_dev,
3586 dev->flags & IFF_PROMISC ? 1 : -1);
3587}
3588
3589static void macsec_dev_set_rx_mode(struct net_device *dev)
3590{
3591 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3592
3593 dev_mc_sync(real_dev, dev);
3594 dev_uc_sync(real_dev, dev);
3595}
3596
3597static int macsec_set_mac_address(struct net_device *dev, void *p)
3598{
3599 struct macsec_dev *macsec = macsec_priv(dev);
3600 struct net_device *real_dev = macsec->real_dev;
3601 struct sockaddr *addr = p;
3602 int err;
3603
3604 if (!is_valid_ether_addr(addr->sa_data))
3605 return -EADDRNOTAVAIL;
3606
3607 if (!(dev->flags & IFF_UP))
3608 goto out;
3609
3610 err = dev_uc_add(real_dev, addr->sa_data);
3611 if (err < 0)
3612 return err;
3613
3614 dev_uc_del(real_dev, dev->dev_addr);
3615
3616out:
e35b8d7d 3617 eth_hw_addr_set(dev, addr->sa_data);
09f4136c
DB		 3618
3619 /* If h/w offloading is available, propagate to the device */
3620 if (macsec_is_offloaded(macsec)) {
3621 const struct macsec_ops *ops;
3622 struct macsec_context ctx;
3623
3624 ops = macsec_get_ops(macsec, &ctx);
3625 if (ops) {
3626 ctx.secy = &macsec->secy;
3627 macsec_offload(ops->mdo_upd_secy, &ctx);
3628 }
3629 }
3630
c09440f7
SD		 3631 return 0;
3632}
3633
3634static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3635{
3636 struct macsec_dev *macsec = macsec_priv(dev);
3637 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3638
3639 if (macsec->real_dev->mtu - extra < new_mtu)
3640 return -ERANGE;
3641
3642 dev->mtu = new_mtu;
3643
3644 return 0;
3645}
3646
bc1f4470 3647static void macsec_get_stats64(struct net_device *dev,
3648 struct rtnl_link_stats64 *s)
c09440f7 3649{
c09440f7 3650 if (!dev->tstats)
bc1f4470 3651 return;
c09440f7 3652
9d015167 3653 dev_fetch_sw_netstats(s, dev->tstats);
c09440f7
SD		 3654
3655 s->rx_dropped = dev->stats.rx_dropped;
3656 s->tx_dropped = dev->stats.tx_dropped;
91ec9bd5 3657 s->rx_errors = dev->stats.rx_errors;
c09440f7
SD		 3658}
3659
3660static int macsec_get_iflink(const struct net_device *dev)
3661{
3662 return macsec_priv(dev)->real_dev->ifindex;
3663}
3664
3665static const struct net_device_ops macsec_netdev_ops = {
3666 .ndo_init = macsec_dev_init,
3667 .ndo_uninit = macsec_dev_uninit,
3668 .ndo_open = macsec_dev_open,
3669 .ndo_stop = macsec_dev_stop,
3670 .ndo_fix_features = macsec_fix_features,
3671 .ndo_change_mtu = macsec_change_mtu,
3672 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3673 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3674 .ndo_set_mac_address = macsec_set_mac_address,
3675 .ndo_start_xmit = macsec_start_xmit,
3676 .ndo_get_stats64 = macsec_get_stats64,
3677 .ndo_get_iflink = macsec_get_iflink,
3678};
3679
3680static const struct device_type macsec_type = {
3681 .name = "macsec",
3682};
3683
3684static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3685 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
31d9a1c5 3686 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
c09440f7
SD		 3687 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3688 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3689 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3690 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3691 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3692 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3693 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3694 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3697 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3698};
3699
3700static void macsec_free_netdev(struct net_device *dev)
3701{
3702 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7 3703
c52add61
SD		 3704 if (macsec->secy.tx_sc.md_dst)
3705 metadata_dst_free(macsec->secy.tx_sc.md_dst);
c09440f7
SD		 3706 free_percpu(macsec->stats);
3707 free_percpu(macsec->secy.tx_sc.stats);
3708
196a888c 3709 /* Get rid of the macsec's reference to real_dev */
d62607c3 3710 netdev_put(macsec->real_dev, &macsec->dev_tracker);
c09440f7
SD		 3711}
3712
3713static void macsec_setup(struct net_device *dev)
3714{
3715 ether_setup(dev);
91572088
JW		 3716 dev->min_mtu = 0;
3717 dev->max_mtu = ETH_MAX_MTU;
e425974f 3718 dev->priv_flags |= IFF_NO_QUEUE;
c09440f7 3719 dev->netdev_ops = &macsec_netdev_ops;
cf124db5
DM		 3720 dev->needs_free_netdev = true;
3721 dev->priv_destructor = macsec_free_netdev;
c24acf03 3722 SET_NETDEV_DEVTYPE(dev, &macsec_type);
c09440f7
SD		 3723
3724 eth_zero_addr(dev->broadcast);
3725}
3726
ccfdec90
FW		 3727static int macsec_changelink_common(struct net_device *dev,
3728 struct nlattr *data[])
c09440f7
SD		 3729{
3730 struct macsec_secy *secy;
3731 struct macsec_tx_sc *tx_sc;
3732
3733 secy = &macsec_priv(dev)->secy;
3734 tx_sc = &secy->tx_sc;
3735
3736 if (data[IFLA_MACSEC_ENCODING_SA]) {
3737 struct macsec_tx_sa *tx_sa;
3738
3739 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3740 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3741
3742 secy->operational = tx_sa && tx_sa->active;
3743 }
3744
c09440f7
SD		 3745 if (data[IFLA_MACSEC_ENCRYPT])
3746 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3747
3748 if (data[IFLA_MACSEC_PROTECT])
3749 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3750
3751 if (data[IFLA_MACSEC_INC_SCI])
3752 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3753
3754 if (data[IFLA_MACSEC_ES])
3755 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3756
3757 if (data[IFLA_MACSEC_SCB])
3758 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3759
3760 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3761 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3762
3763 if (data[IFLA_MACSEC_VALIDATION])
3764 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
ccfdec90
FW		 3765
3766 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3767 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3768 case MACSEC_CIPHER_ID_GCM_AES_128:
e8660ded 3769 case MACSEC_DEFAULT_CIPHER_ID:
ccfdec90 3770 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
48ef50fa 3771 secy->xpn = false;
ccfdec90
FW		 3772 break;
3773 case MACSEC_CIPHER_ID_GCM_AES_256:
3774 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
48ef50fa
EM		 3775 secy->xpn = false;
3776 break;
3777 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3778 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3779 secy->xpn = true;
3780 break;
3781 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3782 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3783 secy->xpn = true;
ccfdec90
FW		 3784 break;
3785 default:
3786 return -EINVAL;
3787 }
3788 }
3789
b07a0e20
SD		 3790 if (data[IFLA_MACSEC_WINDOW]) {
3791 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3792
3793 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3794 * for XPN cipher suites */
3795 if (secy->xpn &&
3796 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3797 return -EINVAL;
3798 }
3799
ccfdec90 3800 return 0;
c09440f7
SD		 3801}
3802
3803static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
ad744b22
MS		 3804 struct nlattr *data[],
3805 struct netlink_ext_ack *extack)
c09440f7 3806{
3cf3227a 3807 struct macsec_dev *macsec = macsec_priv(dev);
022e9d60 3808 struct macsec_tx_sc tx_sc;
3cf3227a
AT		 3809 struct macsec_secy secy;
3810 int ret;
3811
c09440f7
SD		 3812 if (!data)
3813 return 0;
3814
3815 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3816 data[IFLA_MACSEC_ICV_LEN] ||
3817 data[IFLA_MACSEC_SCI] ||
3818 data[IFLA_MACSEC_PORT])
3819 return -EINVAL;
3820
3cf3227a
AT		 3821 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3822 * propagation fails, to revert macsec_changelink_common.
3823 */
3824 memcpy(&secy, &macsec->secy, sizeof(secy));
3825 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3826
3827 ret = macsec_changelink_common(dev, data);
3828 if (ret)
b07a0e20 3829 goto cleanup;
3cf3227a
AT		 3830
3831 /* If h/w offloading is available, propagate to the device */
3832 if (macsec_is_offloaded(macsec)) {
3833 const struct macsec_ops *ops;
3834 struct macsec_context ctx;
3835 int ret;
3836
3837 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3838 if (!ops) {
3839 ret = -EOPNOTSUPP;
3840 goto cleanup;
3841 }
3842
3843 ctx.secy = &macsec->secy;
3844 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3845 if (ret)
3846 goto cleanup;
3847 }
3848
3849 return 0;
3850
3851cleanup:
3852 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3853 memcpy(&macsec->secy, &secy, sizeof(secy));
3854
3855 return ret;
c09440f7
SD		 3856}
3857
3858static void macsec_del_dev(struct macsec_dev *macsec)
3859{
3860 int i;
3861
3862 while (macsec->secy.rx_sc) {
3863 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3864
3865 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3866 free_rx_sc(rx_sc);
3867 }
3868
3869 for (i = 0; i < MACSEC_NUM_AN; i++) {
3870 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3871
3872 if (sa) {
3873 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3874 clear_tx_sa(sa);
3875 }
3876 }
3877}
3878
bbe11fab
SD		 3879static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3880{
3881 struct macsec_dev *macsec = macsec_priv(dev);
e2003872 3882 struct net_device *real_dev = macsec->real_dev;
bbe11fab 3883
9cef24c8
LN		 3884 /* If h/w offloading is available, propagate to the device */
3885 if (macsec_is_offloaded(macsec)) {
3886 const struct macsec_ops *ops;
3887 struct macsec_context ctx;
3888
3889 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3890 if (ops) {
3891 ctx.secy = &macsec->secy;
3892 macsec_offload(ops->mdo_del_secy, &ctx);
3893 }
3894 }
3895
bbe11fab
SD		 3896 unregister_netdevice_queue(dev, head);
3897 list_del_rcu(&macsec->secys);
3898 macsec_del_dev(macsec);
e2003872 3899 netdev_upper_dev_unlink(real_dev, dev);
bbe11fab
SD		 3900
3901 macsec_generation++;
3902}
3903
c09440f7
SD		 3904static void macsec_dellink(struct net_device *dev, struct list_head *head)
3905{
3906 struct macsec_dev *macsec = macsec_priv(dev);
3907 struct net_device *real_dev = macsec->real_dev;
3908 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3909
bbe11fab 3910 macsec_common_dellink(dev, head);
96cfc505 3911
960d5848 3912 if (list_empty(&rxd->secys)) {
c09440f7 3913 netdev_rx_handler_unregister(real_dev);
960d5848
SD		 3914 kfree(rxd);
3915 }
c09440f7
SD		 3916}
3917
3918static int register_macsec_dev(struct net_device *real_dev,
3919 struct net_device *dev)
3920{
3921 struct macsec_dev *macsec = macsec_priv(dev);
3922 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3923
3924 if (!rxd) {
3925 int err;
3926
3927 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3928 if (!rxd)
3929 return -ENOMEM;
3930
3931 INIT_LIST_HEAD(&rxd->secys);
3932
3933 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3934 rxd);
960d5848
SD		 3935 if (err < 0) {
3936 kfree(rxd);
c09440f7 3937 return err;
960d5848 3938 }
c09440f7
SD		 3939 }
3940
3941 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3942 return 0;
3943}
3944
3945static bool sci_exists(struct net_device *dev, sci_t sci)
3946{
3947 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3948 struct macsec_dev *macsec;
3949
3950 list_for_each_entry(macsec, &rxd->secys, secys) {
3951 if (macsec->secy.sci == sci)
3952 return true;
3953 }
3954
3955 return false;
3956}
3957
e82c649e
SD		 3958static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3959{
3960 return make_sci(dev->dev_addr, port);
3961}
3962
c09440f7
SD		 3963static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3964{
3965 struct macsec_dev *macsec = macsec_priv(dev);
3966 struct macsec_secy *secy = &macsec->secy;
3967
3968 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3969 if (!macsec->stats)
3970 return -ENOMEM;
3971
3972 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3973 if (!secy->tx_sc.stats) {
3974 free_percpu(macsec->stats);
3975 return -ENOMEM;
3976 }
3977
0a28bfd4
LN		 3978 secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL);
3979 if (!secy->tx_sc.md_dst) {
3980 free_percpu(secy->tx_sc.stats);
3981 free_percpu(macsec->stats);
3982 return -ENOMEM;
3983 }
3984
c09440f7
SD		 3985 if (sci == MACSEC_UNDEF_SCI)
3986 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3987
3988 secy->netdev = dev;
3989 secy->operational = true;
3990 secy->key_len = DEFAULT_SAK_LEN;
3991 secy->icv_len = icv_len;
3992 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3993 secy->protect_frames = true;
3994 secy->replay_protect = false;
48ef50fa 3995 secy->xpn = DEFAULT_XPN;
c09440f7
SD		 3996
3997 secy->sci = sci;
0a28bfd4 3998 secy->tx_sc.md_dst->u.macsec_info.sci = sci;
c09440f7
SD		 3999 secy->tx_sc.active = true;
4000 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
4001 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
4002 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
4003 secy->tx_sc.end_station = false;
4004 secy->tx_sc.scb = false;
4005
4006 return 0;
4007}
4008
845e0ebb
CW		 4009static struct lock_class_key macsec_netdev_addr_lock_key;
4010
c09440f7 4011static int macsec_newlink(struct net *net, struct net_device *dev,
7a3f4a18
MS		 4012 struct nlattr *tb[], struct nlattr *data[],
4013 struct netlink_ext_ack *extack)
c09440f7
SD		 4014{
4015 struct macsec_dev *macsec = macsec_priv(dev);
7f327080 4016 rx_handler_func_t *rx_handler;
b1671253 4017 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
c09440f7 4018 struct net_device *real_dev;
7f327080 4019 int err, mtu;
c09440f7 4020 sci_t sci;
c09440f7
SD		 4021
4022 if (!tb[IFLA_LINK])
4023 return -EINVAL;
4024 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4025 if (!real_dev)
4026 return -ENODEV;
b06d072c
WB		 4027 if (real_dev->type != ARPHRD_ETHER)
4028 return -EINVAL;
c09440f7
SD		 4029
4030 dev->priv_flags |= IFF_MACSEC;
4031
4032 macsec->real_dev = real_dev;
4033
791bb3fc
MS		 4034 if (data && data[IFLA_MACSEC_OFFLOAD])
4035 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4036 else
4037 /* MACsec offloading is off by default */
4038 macsec->offload = MACSEC_OFFLOAD_OFF;
4039
4040 /* Check if the offloading mode is supported by the underlying layers */
4041 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4042 !macsec_check_offload(macsec->offload, macsec))
4043 return -EOPNOTSUPP;
3cf3227a 4044
d0cfa548
LN		 4045 /* send_sci must be set to true when transmit sci explicitly is set */
4046 if ((data && data[IFLA_MACSEC_SCI]) &&
4047 (data && data[IFLA_MACSEC_INC_SCI])) {
4048 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4049
4050 if (!send_sci)
4051 return -EINVAL;
4052 }
4053
c09440f7
SD		 4054 if (data && data[IFLA_MACSEC_ICV_LEN])
4055 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
7f327080
TY		 4056 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4057 if (mtu < 0)
4058 dev->mtu = 0;
4059 else
4060 dev->mtu = mtu;
c09440f7
SD		 4061
4062 rx_handler = rtnl_dereference(real_dev->rx_handler);
4063 if (rx_handler && rx_handler != macsec_handle_frame)
4064 return -EBUSY;
4065
4066 err = register_netdevice(dev);
4067 if (err < 0)
4068 return err;
4069
1a33e10e 4070 netdev_lockdep_set_classes(dev);
be74294f
CW		 4071 lockdep_set_class(&dev->addr_list_lock,
4072 &macsec_netdev_addr_lock_key);
1a33e10e 4073
42ab19ee 4074 err = netdev_upper_dev_link(real_dev, dev, extack);
e2003872 4075 if (err < 0)
bd28899d 4076 goto unregister;
e2003872 4077
c09440f7
SD		 4078 /* need to be already registered so that ->init has run and
4079 * the MAC addr is set
4080 */
4081 if (data && data[IFLA_MACSEC_SCI])
4082 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4083 else if (data && data[IFLA_MACSEC_PORT])
4084 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4085 else
4086 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4087
4088 if (rx_handler && sci_exists(real_dev, sci)) {
4089 err = -EBUSY;
e2003872 4090 goto unlink;
c09440f7
SD		 4091 }
4092
4093 err = macsec_add_dev(dev, sci, icv_len);
4094 if (err)
e2003872 4095 goto unlink;
c09440f7 4096
ccfdec90
FW		 4097 if (data) {
4098 err = macsec_changelink_common(dev, data);
4099 if (err)
4100 goto del_dev;
4101 }
c09440f7 4102
791bb3fc
MS		 4103 /* If h/w offloading is available, propagate to the device */
4104 if (macsec_is_offloaded(macsec)) {
4105 const struct macsec_ops *ops;
4106 struct macsec_context ctx;
4107
4108 ops = macsec_get_ops(macsec, &ctx);
4109 if (ops) {
4110 ctx.secy = &macsec->secy;
4111 err = macsec_offload(ops->mdo_add_secy, &ctx);
4112 if (err)
4113 goto del_dev;
4114 }
4115 }
4116
c09440f7
SD		 4117 err = register_macsec_dev(real_dev, dev);
4118 if (err < 0)
4119 goto del_dev;
4120
e6ac0758
SD		 4121 netif_stacked_transfer_operstate(real_dev, dev);
4122 linkwatch_fire_event(dev);
4123
96cfc505
SD		 4124 macsec_generation++;
4125
c09440f7
SD		 4126 return 0;
4127
4128del_dev:
4129 macsec_del_dev(macsec);
e2003872
SD		 4130unlink:
4131 netdev_upper_dev_unlink(real_dev, dev);
bd28899d 4132unregister:
c09440f7
SD		 4133 unregister_netdevice(dev);
4134 return err;
4135}
4136
a8b8a889
MS		 4137static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4138 struct netlink_ext_ack *extack)
c09440f7 4139{
74816480 4140 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
b1671253 4141 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
c09440f7
SD		 4142 int flag;
4143 bool es, scb, sci;
4144
4145 if (!data)
4146 return 0;
4147
4148 if (data[IFLA_MACSEC_CIPHER_SUITE])
4149 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4150
f04c392d 4151 if (data[IFLA_MACSEC_ICV_LEN]) {
c09440f7 4152 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
b1671253 4153 if (icv_len != MACSEC_DEFAULT_ICV_LEN) {
f04c392d
DC		 4154 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4155 struct crypto_aead *dummy_tfm;
4156
4157 dummy_tfm = macsec_alloc_tfm(dummy_key,
4158 DEFAULT_SAK_LEN,
4159 icv_len);
4160 if (IS_ERR(dummy_tfm))
4161 return PTR_ERR(dummy_tfm);
4162 crypto_free_aead(dummy_tfm);
4163 }
4164 }
c09440f7
SD		 4165
4166 switch (csid) {
ccfdec90
FW		 4167 case MACSEC_CIPHER_ID_GCM_AES_128:
4168 case MACSEC_CIPHER_ID_GCM_AES_256:
48ef50fa
EM		 4169 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4170 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
e8660ded 4171 case MACSEC_DEFAULT_CIPHER_ID:
c09440f7 4172 if (icv_len < MACSEC_MIN_ICV_LEN ||
2ccbe2cb 4173 icv_len > MACSEC_STD_ICV_LEN)
c09440f7
SD		 4174 return -EINVAL;
4175 break;
4176 default:
4177 return -EINVAL;
4178 }
4179
4180 if (data[IFLA_MACSEC_ENCODING_SA]) {
4181 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4182 return -EINVAL;
4183 }
4184
4185 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4186 flag < IFLA_MACSEC_VALIDATION;
4187 flag++) {
4188 if (data[flag]) {
4189 if (nla_get_u8(data[flag]) > 1)
4190 return -EINVAL;
4191 }
4192 }
4193
4194 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4195 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4196 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4197
4198 if ((sci && (scb || es)) || (scb && es))
4199 return -EINVAL;
4200
4201 if (data[IFLA_MACSEC_VALIDATION] &&
4202 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4203 return -EINVAL;
4204
4b1fb935
SD		 4205 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4206 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
c09440f7
SD		 4207 !data[IFLA_MACSEC_WINDOW])
4208 return -EINVAL;
4209
4210 return 0;
4211}
4212
4213static struct net *macsec_get_link_net(const struct net_device *dev)
4214{
4215 return dev_net(macsec_priv(dev)->real_dev);
4216}
4217
4218static size_t macsec_get_size(const struct net_device *dev)
4219{
c9fba3ed
ZS		 4220 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4221 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4222 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4223 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4224 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4225 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4226 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4227 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4228 nla_total_size(1) + /* IFLA_MACSEC_ES */
4229 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4230 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4231 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
c09440f7
SD		 4232 0;
4233}
4234
4235static int macsec_fill_info(struct sk_buff *skb,
4236 const struct net_device *dev)
4237{
4238 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4239 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ccfdec90
FW		 4240 u64 csid;
4241
4242 switch (secy->key_len) {
4243 case MACSEC_GCM_AES_128_SAK_LEN:
48ef50fa 4244 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 4245 break;
4246 case MACSEC_GCM_AES_256_SAK_LEN:
48ef50fa 4247 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
ccfdec90
FW		 4248 break;
4249 default:
4250 goto nla_put_failure;
4251 }
c09440f7 4252
f60d94c0
ND		 4253 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4254 IFLA_MACSEC_PAD) ||
c09440f7 4255 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
f60d94c0 4256 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
ccfdec90 4257 csid, IFLA_MACSEC_PAD) ||
c09440f7
SD		 4258 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4259 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4260 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4261 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4262 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4263 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4264 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4265 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4266 0)
4267 goto nla_put_failure;
4268
4269 if (secy->replay_protect) {
4270 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4271 goto nla_put_failure;
4272 }
4273
4274 return 0;
4275
4276nla_put_failure:
4277 return -EMSGSIZE;
4278}
4279
4280static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4281 .kind = "macsec",
4282 .priv_size = sizeof(struct macsec_dev),
4283 .maxtype = IFLA_MACSEC_MAX,
4284 .policy = macsec_rtnl_policy,
4285 .setup = macsec_setup,
4286 .validate = macsec_validate_attr,
4287 .newlink = macsec_newlink,
4288 .changelink = macsec_changelink,
4289 .dellink = macsec_dellink,
4290 .get_size = macsec_get_size,
4291 .fill_info = macsec_fill_info,
4292 .get_link_net = macsec_get_link_net,
4293};
4294
4295static bool is_macsec_master(struct net_device *dev)
4296{
4297 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4298}
4299
4300static int macsec_notify(struct notifier_block *this, unsigned long event,
4301 void *ptr)
4302{
4303 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4304 LIST_HEAD(head);
4305
4306 if (!is_macsec_master(real_dev))
4307 return NOTIFY_DONE;
4308
4309 switch (event) {
e6ac0758
SD		 4310 case NETDEV_DOWN:
4311 case NETDEV_UP:
4312 case NETDEV_CHANGE: {
4313 struct macsec_dev *m, *n;
4314 struct macsec_rxh_data *rxd;
4315
4316 rxd = macsec_data_rtnl(real_dev);
4317 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4318 struct net_device *dev = m->secy.netdev;
4319
4320 netif_stacked_transfer_operstate(real_dev, dev);
4321 }
4322 break;
4323 }
c09440f7
SD		 4324 case NETDEV_UNREGISTER: {
4325 struct macsec_dev *m, *n;
4326 struct macsec_rxh_data *rxd;
4327
4328 rxd = macsec_data_rtnl(real_dev);
4329 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
bbe11fab 4330 macsec_common_dellink(m->secy.netdev, &head);
c09440f7 4331 }
bbe11fab
SD		 4332
4333 netdev_rx_handler_unregister(real_dev);
4334 kfree(rxd);
4335
c09440f7
SD		 4336 unregister_netdevice_many(&head);
4337 break;
4338 }
4339 case NETDEV_CHANGEMTU: {
4340 struct macsec_dev *m;
4341 struct macsec_rxh_data *rxd;
4342
4343 rxd = macsec_data_rtnl(real_dev);
4344 list_for_each_entry(m, &rxd->secys, secys) {
4345 struct net_device *dev = m->secy.netdev;
4346 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4347 macsec_extra_len(true));
4348
4349 if (dev->mtu > mtu)
4350 dev_set_mtu(dev, mtu);
4351 }
4352 }
4353 }
4354
4355 return NOTIFY_OK;
4356}
4357
4358static struct notifier_block macsec_notifier = {
4359 .notifier_call = macsec_notify,
4360};
4361
4362static int __init macsec_init(void)
4363{
4364 int err;
4365
4366 pr_info("MACsec IEEE 802.1AE\n");
4367 err = register_netdevice_notifier(&macsec_notifier);
4368 if (err)
4369 return err;
4370
4371 err = rtnl_link_register(&macsec_link_ops);
4372 if (err)
4373 goto notifier;
4374
489111e5 4375 err = genl_register_family(&macsec_fam);
c09440f7
SD		 4376 if (err)
4377 goto rtnl;
4378
4379 return 0;
4380
4381rtnl:
4382 rtnl_link_unregister(&macsec_link_ops);
4383notifier:
4384 unregister_netdevice_notifier(&macsec_notifier);
4385 return err;
4386}
4387
4388static void __exit macsec_exit(void)
4389{
4390 genl_unregister_family(&macsec_fam);
4391 rtnl_link_unregister(&macsec_link_ops);
4392 unregister_netdevice_notifier(&macsec_notifier);
b196c22a 4393 rcu_barrier();
c09440f7
SD		 4394}
4395
4396module_init(macsec_init);
4397module_exit(macsec_exit);
4398
4399MODULE_ALIAS_RTNL_LINK("macsec");
78362998 4400MODULE_ALIAS_GENL_FAMILY("macsec");
c09440f7
SD		 4401
4402MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4403MODULE_LICENSE("GPL v2");
Linux 6.x block layer and io_uring tree(s)