]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blame - drivers/net/macsec.c
projects / mirror_ubuntu-hirsute-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net/mlx5: E-switch, Annotate termtbl_mutex mutex destroy
[mirror_ubuntu-hirsute-kernel.git] / drivers / net / macsec.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
c09440f7
SD		 2/*
3 * drivers/net/macsec.c - MACsec device
4 *
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
c09440f7
SD		 6 */
7
8#include <linux/types.h>
9#include <linux/skbuff.h>
10#include <linux/socket.h>
11#include <linux/module.h>
12#include <crypto/aead.h>
13#include <linux/etherdevice.h>
3cf3227a 14#include <linux/netdevice.h>
c09440f7 15#include <linux/rtnetlink.h>
e187246f 16#include <linux/refcount.h>
c09440f7
SD		 17#include <net/genetlink.h>
18#include <net/sock.h>
5491e7c6 19#include <net/gro_cells.h>
c0e4eadf 20#include <net/macsec.h>
3cf3227a 21#include <linux/phy.h>
c09440f7
SD		 22
23#include <uapi/linux/if_macsec.h>
24
c09440f7
SD		 25#define MACSEC_SCI_LEN 8
26
27/* SecTAG length = macsec_eth_header without the optional SCI */
28#define MACSEC_TAG_LEN 6
29
30struct macsec_eth_header {
31 struct ethhdr eth;
32 /* SecTAG */
33 u8 tci_an;
34#if defined(__LITTLE_ENDIAN_BITFIELD)
35 u8 short_length:6,
36 unused:2;
37#elif defined(__BIG_ENDIAN_BITFIELD)
38 u8 unused:2,
39 short_length:6;
40#else
41#error "Please fix <asm/byteorder.h>"
42#endif
43 __be32 packet_number;
44 u8 secure_channel_id[8]; /* optional */
45} __packed;
46
47#define MACSEC_TCI_VERSION 0x80
48#define MACSEC_TCI_ES 0x40 /* end station */
49#define MACSEC_TCI_SC 0x20 /* SCI present */
50#define MACSEC_TCI_SCB 0x10 /* epon */
51#define MACSEC_TCI_E 0x08 /* encryption */
52#define MACSEC_TCI_C 0x04 /* changed text */
53#define MACSEC_AN_MASK 0x03 /* association number */
54#define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
55
56/* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
57#define MIN_NON_SHORT_LEN 48
58
59#define GCM_AES_IV_LEN 12
60#define DEFAULT_ICV_LEN 16
61
7979472b 62#define for_each_rxsc(secy, sc) \
c09440f7 63 for (sc = rcu_dereference_bh(secy->rx_sc); \
7979472b 64 sc; \
c09440f7
SD		 65 sc = rcu_dereference_bh(sc->next))
66#define for_each_rxsc_rtnl(secy, sc) \
67 for (sc = rtnl_dereference(secy->rx_sc); \
68 sc; \
69 sc = rtnl_dereference(sc->next))
70
71struct gcm_iv {
72 union {
73 u8 secure_channel_id[8];
74 sci_t sci;
75 };
76 __be32 pn;
77};
78
c09440f7
SD		 79struct macsec_dev_stats {
80 __u64 OutPktsUntagged;
81 __u64 InPktsUntagged;
82 __u64 OutPktsTooLong;
83 __u64 InPktsNoTag;
84 __u64 InPktsBadTag;
85 __u64 InPktsUnknownSCI;
86 __u64 InPktsNoSCI;
87 __u64 InPktsOverrun;
88};
89
c09440f7
SD		 90#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
91
c09440f7
SD		 92struct pcpu_secy_stats {
93 struct macsec_dev_stats stats;
94 struct u64_stats_sync syncp;
95};
96
97/**
98 * struct macsec_dev - private data
99 * @secy: SecY config
100 * @real_dev: pointer to underlying netdevice
101 * @stats: MACsec device stats
102 * @secys: linked list of SecY's on the underlying device
3cf3227a 103 * @offload: status of offloading on the MACsec device
c09440f7
SD		 104 */
105struct macsec_dev {
106 struct macsec_secy secy;
107 struct net_device *real_dev;
108 struct pcpu_secy_stats __percpu *stats;
109 struct list_head secys;
5491e7c6 110 struct gro_cells gro_cells;
3cf3227a 111 enum macsec_offload offload;
c09440f7
SD		 112};
113
114/**
115 * struct macsec_rxh_data - rx_handler private argument
116 * @secys: linked list of SecY's on this underlying device
117 */
118struct macsec_rxh_data {
119 struct list_head secys;
120};
121
122static struct macsec_dev *macsec_priv(const struct net_device *dev)
123{
124 return (struct macsec_dev *)netdev_priv(dev);
125}
126
127static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
128{
129 return rcu_dereference_bh(dev->rx_handler_data);
130}
131
132static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
133{
134 return rtnl_dereference(dev->rx_handler_data);
135}
136
137struct macsec_cb {
138 struct aead_request *req;
139 union {
140 struct macsec_tx_sa *tx_sa;
141 struct macsec_rx_sa *rx_sa;
142 };
143 u8 assoc_num;
144 bool valid;
145 bool has_sci;
146};
147
148static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
149{
150 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
151
152 if (!sa || !sa->active)
153 return NULL;
154
e187246f 155 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 156 return NULL;
157
158 return sa;
159}
160
161static void free_rx_sc_rcu(struct rcu_head *head)
162{
163 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
164
165 free_percpu(rx_sc->stats);
166 kfree(rx_sc);
167}
168
169static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
170{
8676d76f 171 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
c09440f7
SD		 172}
173
174static void macsec_rxsc_put(struct macsec_rx_sc *sc)
175{
8676d76f 176 if (refcount_dec_and_test(&sc->refcnt))
c09440f7
SD		 177 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
178}
179
180static void free_rxsa(struct rcu_head *head)
181{
182 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
183
184 crypto_free_aead(sa->key.tfm);
185 free_percpu(sa->stats);
c09440f7
SD		 186 kfree(sa);
187}
188
189static void macsec_rxsa_put(struct macsec_rx_sa *sa)
190{
e187246f 191 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 192 call_rcu(&sa->rcu, free_rxsa);
193}
194
195static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
196{
197 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
198
199 if (!sa || !sa->active)
200 return NULL;
201
28206cdb 202 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 203 return NULL;
204
205 return sa;
206}
207
208static void free_txsa(struct rcu_head *head)
209{
210 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
211
212 crypto_free_aead(sa->key.tfm);
213 free_percpu(sa->stats);
214 kfree(sa);
215}
216
217static void macsec_txsa_put(struct macsec_tx_sa *sa)
218{
28206cdb 219 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 220 call_rcu(&sa->rcu, free_txsa);
221}
222
223static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
224{
225 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
226 return (struct macsec_cb *)skb->cb;
227}
228
229#define MACSEC_PORT_ES (htons(0x0001))
230#define MACSEC_PORT_SCB (0x0000)
231#define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
232
ccfdec90
FW		 233#define MACSEC_GCM_AES_128_SAK_LEN 16
234#define MACSEC_GCM_AES_256_SAK_LEN 32
235
ccfdec90 236#define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
c09440f7
SD		 237#define DEFAULT_SEND_SCI true
238#define DEFAULT_ENCRYPT false
239#define DEFAULT_ENCODING_SA 0
240
e0f841f5
TB		 241static bool send_sci(const struct macsec_secy *secy)
242{
243 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
244
245 return tx_sc->send_sci ||
246 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
247}
248
c09440f7
SD		 249static sci_t make_sci(u8 *addr, __be16 port)
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;
313 else if (secy->icv_len != DEFAULT_ICV_LEN)
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{
328 if (macsec->offload == MACSEC_OFFLOAD_PHY)
329 return true;
330
331 return false;
332}
333
334/* Checks if underlying layers implement MACsec offloading functions. */
335static bool macsec_check_offload(enum macsec_offload offload,
336 struct macsec_dev *macsec)
337{
338 if (!macsec || !macsec->real_dev)
339 return false;
340
341 if (offload == MACSEC_OFFLOAD_PHY)
342 return macsec->real_dev->phydev &&
343 macsec->real_dev->phydev->macsec_ops;
344
345 return false;
346}
347
348static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
349 struct macsec_dev *macsec,
350 struct macsec_context *ctx)
351{
352 if (ctx) {
353 memset(ctx, 0, sizeof(*ctx));
354 ctx->offload = offload;
355
356 if (offload == MACSEC_OFFLOAD_PHY)
357 ctx->phydev = macsec->real_dev->phydev;
358 }
359
360 return macsec->real_dev->phydev->macsec_ops;
361}
362
363/* Returns a pointer to the MACsec ops struct if any and updates the MACsec
364 * context device reference if provided.
365 */
366static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
367 struct macsec_context *ctx)
368{
369 if (!macsec_check_offload(macsec->offload, macsec))
370 return NULL;
371
372 return __macsec_get_ops(macsec->offload, macsec, ctx);
373}
374
c09440f7
SD		 375/* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
376static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
377{
378 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
379 int len = skb->len - 2 * ETH_ALEN;
380 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
381
382 /* a) It comprises at least 17 octets */
383 if (skb->len <= 16)
384 return false;
385
386 /* b) MACsec EtherType: already checked */
387
388 /* c) V bit is clear */
389 if (h->tci_an & MACSEC_TCI_VERSION)
390 return false;
391
392 /* d) ES or SCB => !SC */
393 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
394 (h->tci_an & MACSEC_TCI_SC))
395 return false;
396
397 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
398 if (h->unused)
399 return false;
400
401 /* rx.pn != 0 (figure 10-5) */
402 if (!h->packet_number)
403 return false;
404
405 /* length check, f) g) h) i) */
406 if (h->short_length)
407 return len == extra_len + h->short_length;
408 return len >= extra_len + MIN_NON_SHORT_LEN;
409}
410
411#define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
2ccbe2cb 412#define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
c09440f7
SD		 413
414static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
415{
416 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
417
418 gcm_iv->sci = sci;
419 gcm_iv->pn = htonl(pn);
420}
421
422static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
423{
424 return (struct macsec_eth_header *)skb_mac_header(skb);
425}
426
6fc498bc
DB		 427static sci_t dev_to_sci(struct net_device *dev, __be16 port)
428{
429 return make_sci(dev->dev_addr, port);
430}
431
5c937de7
AT		 432static void __macsec_pn_wrapped(struct macsec_secy *secy,
433 struct macsec_tx_sa *tx_sa)
434{
435 pr_debug("PN wrapped, transitioning to !oper\n");
436 tx_sa->active = false;
437 if (secy->protect_frames)
438 secy->operational = false;
439}
440
441void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
442{
443 spin_lock_bh(&tx_sa->lock);
444 __macsec_pn_wrapped(secy, tx_sa);
445 spin_unlock_bh(&tx_sa->lock);
446}
447EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
448
c09440f7
SD		 449static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
450{
451 u32 pn;
452
453 spin_lock_bh(&tx_sa->lock);
454 pn = tx_sa->next_pn;
455
456 tx_sa->next_pn++;
5c937de7
AT		 457 if (tx_sa->next_pn == 0)
458 __macsec_pn_wrapped(secy, tx_sa);
c09440f7
SD		 459 spin_unlock_bh(&tx_sa->lock);
460
461 return pn;
462}
463
464static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
465{
466 struct macsec_dev *macsec = netdev_priv(dev);
467
468 skb->dev = macsec->real_dev;
469 skb_reset_mac_header(skb);
470 skb->protocol = eth_hdr(skb)->h_proto;
471}
472
473static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
474 struct macsec_tx_sa *tx_sa)
475{
476 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
477
478 u64_stats_update_begin(&txsc_stats->syncp);
479 if (tx_sc->encrypt) {
480 txsc_stats->stats.OutOctetsEncrypted += skb->len;
481 txsc_stats->stats.OutPktsEncrypted++;
482 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
483 } else {
484 txsc_stats->stats.OutOctetsProtected += skb->len;
485 txsc_stats->stats.OutPktsProtected++;
486 this_cpu_inc(tx_sa->stats->OutPktsProtected);
487 }
488 u64_stats_update_end(&txsc_stats->syncp);
489}
490
491static void count_tx(struct net_device *dev, int ret, int len)
492{
493 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
494 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
495
496 u64_stats_update_begin(&stats->syncp);
497 stats->tx_packets++;
498 stats->tx_bytes += len;
499 u64_stats_update_end(&stats->syncp);
c09440f7
SD		 500 }
501}
502
503static void macsec_encrypt_done(struct crypto_async_request *base, int err)
504{
505 struct sk_buff *skb = base->data;
506 struct net_device *dev = skb->dev;
507 struct macsec_dev *macsec = macsec_priv(dev);
508 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
509 int len, ret;
510
511 aead_request_free(macsec_skb_cb(skb)->req);
512
513 rcu_read_lock_bh();
514 macsec_encrypt_finish(skb, dev);
515 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
516 len = skb->len;
517 ret = dev_queue_xmit(skb);
518 count_tx(dev, ret, len);
519 rcu_read_unlock_bh();
520
521 macsec_txsa_put(sa);
522 dev_put(dev);
523}
524
5d9649b3
SD		 525static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
526 unsigned char **iv,
5294b830
JD		 527 struct scatterlist **sg,
528 int num_frags)
5d9649b3
SD		 529{
530 size_t size, iv_offset, sg_offset;
531 struct aead_request *req;
532 void *tmp;
533
534 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
535 iv_offset = size;
536 size += GCM_AES_IV_LEN;
537
538 size = ALIGN(size, __alignof__(struct scatterlist));
539 sg_offset = size;
5294b830 540 size += sizeof(struct scatterlist) * num_frags;
5d9649b3
SD		 541
542 tmp = kmalloc(size, GFP_ATOMIC);
543 if (!tmp)
544 return NULL;
545
546 *iv = (unsigned char *)(tmp + iv_offset);
547 *sg = (struct scatterlist *)(tmp + sg_offset);
548 req = tmp;
549
550 aead_request_set_tfm(req, tfm);
551
552 return req;
553}
554
c09440f7
SD		 555static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
556 struct net_device *dev)
557{
558 int ret;
5d9649b3 559 struct scatterlist *sg;
5294b830 560 struct sk_buff *trailer;
5d9649b3 561 unsigned char *iv;
c09440f7
SD		 562 struct ethhdr *eth;
563 struct macsec_eth_header *hh;
564 size_t unprotected_len;
565 struct aead_request *req;
566 struct macsec_secy *secy;
567 struct macsec_tx_sc *tx_sc;
568 struct macsec_tx_sa *tx_sa;
569 struct macsec_dev *macsec = macsec_priv(dev);
e0f841f5 570 bool sci_present;
c09440f7
SD		 571 u32 pn;
572
573 secy = &macsec->secy;
574 tx_sc = &secy->tx_sc;
575
576 /* 10.5.1 TX SA assignment */
577 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
578 if (!tx_sa) {
579 secy->operational = false;
580 kfree_skb(skb);
581 return ERR_PTR(-EINVAL);
582 }
583
584 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
585 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
586 struct sk_buff *nskb = skb_copy_expand(skb,
587 MACSEC_NEEDED_HEADROOM,
588 MACSEC_NEEDED_TAILROOM,
589 GFP_ATOMIC);
590 if (likely(nskb)) {
591 consume_skb(skb);
592 skb = nskb;
593 } else {
594 macsec_txsa_put(tx_sa);
595 kfree_skb(skb);
596 return ERR_PTR(-ENOMEM);
597 }
598 } else {
599 skb = skb_unshare(skb, GFP_ATOMIC);
600 if (!skb) {
601 macsec_txsa_put(tx_sa);
602 return ERR_PTR(-ENOMEM);
603 }
604 }
605
606 unprotected_len = skb->len;
607 eth = eth_hdr(skb);
e0f841f5 608 sci_present = send_sci(secy);
d58ff351 609 hh = skb_push(skb, macsec_extra_len(sci_present));
c09440f7
SD		 610 memmove(hh, eth, 2 * ETH_ALEN);
611
612 pn = tx_sa_update_pn(tx_sa, secy);
613 if (pn == 0) {
614 macsec_txsa_put(tx_sa);
615 kfree_skb(skb);
616 return ERR_PTR(-ENOLINK);
617 }
e0f841f5 618 macsec_fill_sectag(hh, secy, pn, sci_present);
c09440f7
SD		 619 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
620
c09440f7
SD		 621 skb_put(skb, secy->icv_len);
622
623 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
624 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
625
626 u64_stats_update_begin(&secy_stats->syncp);
627 secy_stats->stats.OutPktsTooLong++;
628 u64_stats_update_end(&secy_stats->syncp);
629
630 macsec_txsa_put(tx_sa);
631 kfree_skb(skb);
632 return ERR_PTR(-EINVAL);
633 }
634
5294b830
JD		 635 ret = skb_cow_data(skb, 0, &trailer);
636 if (unlikely(ret < 0)) {
637 macsec_txsa_put(tx_sa);
638 kfree_skb(skb);
639 return ERR_PTR(ret);
640 }
641
642 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 643 if (!req) {
644 macsec_txsa_put(tx_sa);
645 kfree_skb(skb);
646 return ERR_PTR(-ENOMEM);
647 }
648
5d9649b3
SD		 649 macsec_fill_iv(iv, secy->sci, pn);
650
5294b830 651 sg_init_table(sg, ret);
cda7ea69
JD		 652 ret = skb_to_sgvec(skb, sg, 0, skb->len);
653 if (unlikely(ret < 0)) {
5aba2ba5 654 aead_request_free(req);
cda7ea69
JD		 655 macsec_txsa_put(tx_sa);
656 kfree_skb(skb);
657 return ERR_PTR(ret);
658 }
c09440f7
SD		 659
660 if (tx_sc->encrypt) {
e0f841f5 661 int len = skb->len - macsec_hdr_len(sci_present) -
c09440f7
SD		 662 secy->icv_len;
663 aead_request_set_crypt(req, sg, sg, len, iv);
e0f841f5 664 aead_request_set_ad(req, macsec_hdr_len(sci_present));
c09440f7
SD		 665 } else {
666 aead_request_set_crypt(req, sg, sg, 0, iv);
667 aead_request_set_ad(req, skb->len - secy->icv_len);
668 }
669
670 macsec_skb_cb(skb)->req = req;
671 macsec_skb_cb(skb)->tx_sa = tx_sa;
672 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
673
674 dev_hold(skb->dev);
675 ret = crypto_aead_encrypt(req);
676 if (ret == -EINPROGRESS) {
677 return ERR_PTR(ret);
678 } else if (ret != 0) {
679 dev_put(skb->dev);
680 kfree_skb(skb);
681 aead_request_free(req);
682 macsec_txsa_put(tx_sa);
683 return ERR_PTR(-EINVAL);
684 }
685
686 dev_put(skb->dev);
687 aead_request_free(req);
688 macsec_txsa_put(tx_sa);
689
690 return skb;
691}
692
693static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
694{
695 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
696 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
697 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
698 u32 lowest_pn = 0;
699
700 spin_lock(&rx_sa->lock);
701 if (rx_sa->next_pn >= secy->replay_window)
702 lowest_pn = rx_sa->next_pn - secy->replay_window;
703
704 /* Now perform replay protection check again
705 * (see IEEE 802.1AE-2006 figure 10-5)
706 */
707 if (secy->replay_protect && pn < lowest_pn) {
708 spin_unlock(&rx_sa->lock);
709 u64_stats_update_begin(&rxsc_stats->syncp);
710 rxsc_stats->stats.InPktsLate++;
711 u64_stats_update_end(&rxsc_stats->syncp);
712 return false;
713 }
714
715 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
716 u64_stats_update_begin(&rxsc_stats->syncp);
717 if (hdr->tci_an & MACSEC_TCI_E)
718 rxsc_stats->stats.InOctetsDecrypted += skb->len;
719 else
720 rxsc_stats->stats.InOctetsValidated += skb->len;
721 u64_stats_update_end(&rxsc_stats->syncp);
722 }
723
724 if (!macsec_skb_cb(skb)->valid) {
725 spin_unlock(&rx_sa->lock);
726
727 /* 10.6.5 */
728 if (hdr->tci_an & MACSEC_TCI_C ||
729 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
730 u64_stats_update_begin(&rxsc_stats->syncp);
731 rxsc_stats->stats.InPktsNotValid++;
732 u64_stats_update_end(&rxsc_stats->syncp);
733 return false;
734 }
735
736 u64_stats_update_begin(&rxsc_stats->syncp);
737 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
738 rxsc_stats->stats.InPktsInvalid++;
739 this_cpu_inc(rx_sa->stats->InPktsInvalid);
740 } else if (pn < lowest_pn) {
741 rxsc_stats->stats.InPktsDelayed++;
742 } else {
743 rxsc_stats->stats.InPktsUnchecked++;
744 }
745 u64_stats_update_end(&rxsc_stats->syncp);
746 } else {
747 u64_stats_update_begin(&rxsc_stats->syncp);
748 if (pn < lowest_pn) {
749 rxsc_stats->stats.InPktsDelayed++;
750 } else {
751 rxsc_stats->stats.InPktsOK++;
752 this_cpu_inc(rx_sa->stats->InPktsOK);
753 }
754 u64_stats_update_end(&rxsc_stats->syncp);
755
756 if (pn >= rx_sa->next_pn)
757 rx_sa->next_pn = pn + 1;
758 spin_unlock(&rx_sa->lock);
759 }
760
761 return true;
762}
763
764static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
765{
766 skb->pkt_type = PACKET_HOST;
767 skb->protocol = eth_type_trans(skb, dev);
768
769 skb_reset_network_header(skb);
770 if (!skb_transport_header_was_set(skb))
771 skb_reset_transport_header(skb);
772 skb_reset_mac_len(skb);
773}
774
775static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
776{
7d8b16b9 777 skb->ip_summed = CHECKSUM_NONE;
c09440f7
SD		 778 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
779 skb_pull(skb, hdr_len);
780 pskb_trim_unique(skb, skb->len - icv_len);
781}
782
783static void count_rx(struct net_device *dev, int len)
784{
785 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
786
787 u64_stats_update_begin(&stats->syncp);
788 stats->rx_packets++;
789 stats->rx_bytes += len;
790 u64_stats_update_end(&stats->syncp);
791}
792
793static void macsec_decrypt_done(struct crypto_async_request *base, int err)
794{
795 struct sk_buff *skb = base->data;
796 struct net_device *dev = skb->dev;
797 struct macsec_dev *macsec = macsec_priv(dev);
798 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
c78ebe1d 799 struct macsec_rx_sc *rx_sc = rx_sa->sc;
863483c9 800 int len;
c09440f7
SD		 801 u32 pn;
802
803 aead_request_free(macsec_skb_cb(skb)->req);
804
b3bdc3ac
LR		 805 if (!err)
806 macsec_skb_cb(skb)->valid = true;
807
c09440f7
SD		 808 rcu_read_lock_bh();
809 pn = ntohl(macsec_ethhdr(skb)->packet_number);
810 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
811 rcu_read_unlock_bh();
812 kfree_skb(skb);
813 goto out;
814 }
815
816 macsec_finalize_skb(skb, macsec->secy.icv_len,
817 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
818 macsec_reset_skb(skb, macsec->secy.netdev);
819
820 len = skb->len;
863483c9 821 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
c09440f7 822 count_rx(dev, len);
c09440f7
SD		 823
824 rcu_read_unlock_bh();
825
826out:
827 macsec_rxsa_put(rx_sa);
c78ebe1d 828 macsec_rxsc_put(rx_sc);
c09440f7 829 dev_put(dev);
c09440f7
SD		 830}
831
832static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
833 struct net_device *dev,
834 struct macsec_rx_sa *rx_sa,
835 sci_t sci,
836 struct macsec_secy *secy)
837{
838 int ret;
5d9649b3 839 struct scatterlist *sg;
5294b830 840 struct sk_buff *trailer;
5d9649b3 841 unsigned char *iv;
c09440f7
SD		 842 struct aead_request *req;
843 struct macsec_eth_header *hdr;
844 u16 icv_len = secy->icv_len;
845
846 macsec_skb_cb(skb)->valid = false;
847 skb = skb_share_check(skb, GFP_ATOMIC);
848 if (!skb)
c3b7d0bd 849 return ERR_PTR(-ENOMEM);
c09440f7 850
5294b830
JD		 851 ret = skb_cow_data(skb, 0, &trailer);
852 if (unlikely(ret < 0)) {
853 kfree_skb(skb);
854 return ERR_PTR(ret);
855 }
856 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 857 if (!req) {
858 kfree_skb(skb);
c3b7d0bd 859 return ERR_PTR(-ENOMEM);
c09440f7
SD		 860 }
861
862 hdr = (struct macsec_eth_header *)skb->data;
863 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
864
5294b830 865 sg_init_table(sg, ret);
cda7ea69
JD		 866 ret = skb_to_sgvec(skb, sg, 0, skb->len);
867 if (unlikely(ret < 0)) {
5aba2ba5 868 aead_request_free(req);
cda7ea69
JD		 869 kfree_skb(skb);
870 return ERR_PTR(ret);
871 }
c09440f7
SD		 872
873 if (hdr->tci_an & MACSEC_TCI_E) {
874 /* confidentiality: ethernet + macsec header
875 * authenticated, encrypted payload
876 */
877 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
878
879 aead_request_set_crypt(req, sg, sg, len, iv);
880 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
881 skb = skb_unshare(skb, GFP_ATOMIC);
882 if (!skb) {
883 aead_request_free(req);
c3b7d0bd 884 return ERR_PTR(-ENOMEM);
c09440f7
SD		 885 }
886 } else {
887 /* integrity only: all headers + data authenticated */
888 aead_request_set_crypt(req, sg, sg, icv_len, iv);
889 aead_request_set_ad(req, skb->len - icv_len);
890 }
891
892 macsec_skb_cb(skb)->req = req;
c09440f7
SD		 893 skb->dev = dev;
894 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
895
896 dev_hold(dev);
897 ret = crypto_aead_decrypt(req);
898 if (ret == -EINPROGRESS) {
c3b7d0bd 899 return ERR_PTR(ret);
c09440f7
SD		 900 } else if (ret != 0) {
901 /* decryption/authentication failed
902 * 10.6 if validateFrames is disabled, deliver anyway
903 */
904 if (ret != -EBADMSG) {
905 kfree_skb(skb);
c3b7d0bd 906 skb = ERR_PTR(ret);
c09440f7
SD		 907 }
908 } else {
909 macsec_skb_cb(skb)->valid = true;
910 }
911 dev_put(dev);
912
913 aead_request_free(req);
914
915 return skb;
916}
917
918static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
919{
920 struct macsec_rx_sc *rx_sc;
921
922 for_each_rxsc(secy, rx_sc) {
923 if (rx_sc->sci == sci)
924 return rx_sc;
925 }
926
927 return NULL;
928}
929
930static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
931{
932 struct macsec_rx_sc *rx_sc;
933
934 for_each_rxsc_rtnl(secy, rx_sc) {
935 if (rx_sc->sci == sci)
936 return rx_sc;
937 }
938
939 return NULL;
940}
941
3cf3227a 942static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
c09440f7 943{
3cf3227a
AT		 944 /* Deliver to the uncontrolled port by default */
945 enum rx_handler_result ret = RX_HANDLER_PASS;
c09440f7
SD		 946 struct macsec_rxh_data *rxd;
947 struct macsec_dev *macsec;
948
949 rcu_read_lock();
950 rxd = macsec_data_rcu(skb->dev);
951
952 /* 10.6 If the management control validateFrames is not
953 * Strict, frames without a SecTAG are received, counted, and
954 * delivered to the Controlled Port
955 */
956 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
957 struct sk_buff *nskb;
c09440f7
SD		 958 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
959
3cf3227a
AT		 960 if (!macsec_is_offloaded(macsec) &&
961 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
c09440f7
SD		 962 u64_stats_update_begin(&secy_stats->syncp);
963 secy_stats->stats.InPktsNoTag++;
964 u64_stats_update_end(&secy_stats->syncp);
965 continue;
966 }
967
968 /* deliver on this port */
969 nskb = skb_clone(skb, GFP_ATOMIC);
970 if (!nskb)
971 break;
972
973 nskb->dev = macsec->secy.netdev;
974
863483c9 975 if (netif_rx(nskb) == NET_RX_SUCCESS) {
c09440f7
SD		 976 u64_stats_update_begin(&secy_stats->syncp);
977 secy_stats->stats.InPktsUntagged++;
978 u64_stats_update_end(&secy_stats->syncp);
c09440f7 979 }
3cf3227a
AT		 980
981 if (netif_running(macsec->secy.netdev) &&
982 macsec_is_offloaded(macsec)) {
983 ret = RX_HANDLER_EXACT;
984 goto out;
985 }
c09440f7
SD		 986 }
987
3cf3227a 988out:
c09440f7 989 rcu_read_unlock();
3cf3227a 990 return ret;
c09440f7
SD		 991}
992
993static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
994{
995 struct sk_buff *skb = *pskb;
996 struct net_device *dev = skb->dev;
997 struct macsec_eth_header *hdr;
998 struct macsec_secy *secy = NULL;
999 struct macsec_rx_sc *rx_sc;
1000 struct macsec_rx_sa *rx_sa;
1001 struct macsec_rxh_data *rxd;
1002 struct macsec_dev *macsec;
1003 sci_t sci;
1004 u32 pn;
1005 bool cbit;
1006 struct pcpu_rx_sc_stats *rxsc_stats;
1007 struct pcpu_secy_stats *secy_stats;
1008 bool pulled_sci;
5491e7c6 1009 int ret;
c09440f7
SD		 1010
1011 if (skb_headroom(skb) < ETH_HLEN)
1012 goto drop_direct;
1013
1014 hdr = macsec_ethhdr(skb);
3cf3227a
AT		 1015 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1016 return handle_not_macsec(skb);
c09440f7
SD		 1017
1018 skb = skb_unshare(skb, GFP_ATOMIC);
095c02da
AS		 1019 *pskb = skb;
1020 if (!skb)
c09440f7 1021 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1022
1023 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1024 if (!pulled_sci) {
1025 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1026 goto drop_direct;
1027 }
1028
1029 hdr = macsec_ethhdr(skb);
1030
1031 /* Frames with a SecTAG that has the TCI E bit set but the C
1032 * bit clear are discarded, as this reserved encoding is used
1033 * to identify frames with a SecTAG that are not to be
1034 * delivered to the Controlled Port.
1035 */
1036 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1037 return RX_HANDLER_PASS;
1038
1039 /* now, pull the extra length */
1040 if (hdr->tci_an & MACSEC_TCI_SC) {
1041 if (!pulled_sci)
1042 goto drop_direct;
1043 }
1044
1045 /* ethernet header is part of crypto processing */
1046 skb_push(skb, ETH_HLEN);
1047
1048 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1049 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1050 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1051
1052 rcu_read_lock();
1053 rxd = macsec_data_rcu(skb->dev);
1054
1055 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1056 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
7979472b 1057
c78ebe1d 1058 sc = sc ? macsec_rxsc_get(sc) : NULL;
c09440f7
SD		 1059
1060 if (sc) {
1061 secy = &macsec->secy;
1062 rx_sc = sc;
1063 break;
1064 }
1065 }
1066
1067 if (!secy)
1068 goto nosci;
1069
1070 dev = secy->netdev;
1071 macsec = macsec_priv(dev);
1072 secy_stats = this_cpu_ptr(macsec->stats);
1073 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1074
1075 if (!macsec_validate_skb(skb, secy->icv_len)) {
1076 u64_stats_update_begin(&secy_stats->syncp);
1077 secy_stats->stats.InPktsBadTag++;
1078 u64_stats_update_end(&secy_stats->syncp);
1079 goto drop_nosa;
1080 }
1081
1082 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1083 if (!rx_sa) {
1084 /* 10.6.1 if the SA is not in use */
1085
1086 /* If validateFrames is Strict or the C bit in the
1087 * SecTAG is set, discard
1088 */
1089 if (hdr->tci_an & MACSEC_TCI_C ||
1090 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1091 u64_stats_update_begin(&rxsc_stats->syncp);
1092 rxsc_stats->stats.InPktsNotUsingSA++;
1093 u64_stats_update_end(&rxsc_stats->syncp);
1094 goto drop_nosa;
1095 }
1096
1097 /* not Strict, the frame (with the SecTAG and ICV
1098 * removed) is delivered to the Controlled Port.
1099 */
1100 u64_stats_update_begin(&rxsc_stats->syncp);
1101 rxsc_stats->stats.InPktsUnusedSA++;
1102 u64_stats_update_end(&rxsc_stats->syncp);
1103 goto deliver;
1104 }
1105
1106 /* First, PN check to avoid decrypting obviously wrong packets */
1107 pn = ntohl(hdr->packet_number);
1108 if (secy->replay_protect) {
1109 bool late;
1110
1111 spin_lock(&rx_sa->lock);
1112 late = rx_sa->next_pn >= secy->replay_window &&
1113 pn < (rx_sa->next_pn - secy->replay_window);
1114 spin_unlock(&rx_sa->lock);
1115
1116 if (late) {
1117 u64_stats_update_begin(&rxsc_stats->syncp);
1118 rxsc_stats->stats.InPktsLate++;
1119 u64_stats_update_end(&rxsc_stats->syncp);
1120 goto drop;
1121 }
1122 }
1123
e3a3b626
BG		 1124 macsec_skb_cb(skb)->rx_sa = rx_sa;
1125
c09440f7
SD		 1126 /* Disabled && !changed text => skip validation */
1127 if (hdr->tci_an & MACSEC_TCI_C ||
1128 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1129 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1130
c3b7d0bd
SD		 1131 if (IS_ERR(skb)) {
1132 /* the decrypt callback needs the reference */
c78ebe1d 1133 if (PTR_ERR(skb) != -EINPROGRESS) {
c3b7d0bd 1134 macsec_rxsa_put(rx_sa);
c78ebe1d
SD		 1135 macsec_rxsc_put(rx_sc);
1136 }
c09440f7
SD		 1137 rcu_read_unlock();
1138 *pskb = NULL;
1139 return RX_HANDLER_CONSUMED;
1140 }
1141
1142 if (!macsec_post_decrypt(skb, secy, pn))
1143 goto drop;
1144
1145deliver:
1146 macsec_finalize_skb(skb, secy->icv_len,
1147 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1148 macsec_reset_skb(skb, secy->netdev);
1149
497f358a
SD		 1150 if (rx_sa)
1151 macsec_rxsa_put(rx_sa);
c78ebe1d 1152 macsec_rxsc_put(rx_sc);
5491e7c6 1153
ba56d8ce 1154 skb_orphan(skb);
5491e7c6
PA		 1155 ret = gro_cells_receive(&macsec->gro_cells, skb);
1156 if (ret == NET_RX_SUCCESS)
1157 count_rx(dev, skb->len);
1158 else
1159 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1160
1161 rcu_read_unlock();
1162
5491e7c6
PA		 1163 *pskb = NULL;
1164 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1165
1166drop:
1167 macsec_rxsa_put(rx_sa);
1168drop_nosa:
c78ebe1d 1169 macsec_rxsc_put(rx_sc);
c09440f7
SD		 1170 rcu_read_unlock();
1171drop_direct:
1172 kfree_skb(skb);
1173 *pskb = NULL;
1174 return RX_HANDLER_CONSUMED;
1175
1176nosci:
1177 /* 10.6.1 if the SC is not found */
1178 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1179 if (!cbit)
1180 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1181 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1182
1183 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1184 struct sk_buff *nskb;
c09440f7
SD		 1185
1186 secy_stats = this_cpu_ptr(macsec->stats);
1187
1188 /* If validateFrames is Strict or the C bit in the
1189 * SecTAG is set, discard
1190 */
1191 if (cbit ||
1192 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1193 u64_stats_update_begin(&secy_stats->syncp);
1194 secy_stats->stats.InPktsNoSCI++;
1195 u64_stats_update_end(&secy_stats->syncp);
1196 continue;
1197 }
1198
1199 /* not strict, the frame (with the SecTAG and ICV
1200 * removed) is delivered to the Controlled Port.
1201 */
1202 nskb = skb_clone(skb, GFP_ATOMIC);
1203 if (!nskb)
1204 break;
1205
1206 macsec_reset_skb(nskb, macsec->secy.netdev);
1207
1208 ret = netif_rx(nskb);
1209 if (ret == NET_RX_SUCCESS) {
1210 u64_stats_update_begin(&secy_stats->syncp);
1211 secy_stats->stats.InPktsUnknownSCI++;
1212 u64_stats_update_end(&secy_stats->syncp);
1213 } else {
1214 macsec->secy.netdev->stats.rx_dropped++;
1215 }
1216 }
1217
1218 rcu_read_unlock();
1219 *pskb = skb;
1220 return RX_HANDLER_PASS;
1221}
1222
1223static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1224{
1225 struct crypto_aead *tfm;
1226 int ret;
1227
6052f7fb 1228 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
34aedfee
DC		 1229
1230 if (IS_ERR(tfm))
1231 return tfm;
c09440f7
SD		 1232
1233 ret = crypto_aead_setkey(tfm, key, key_len);
34aedfee
DC		 1234 if (ret < 0)
1235 goto fail;
c09440f7
SD		 1236
1237 ret = crypto_aead_setauthsize(tfm, icv_len);
34aedfee
DC		 1238 if (ret < 0)
1239 goto fail;
c09440f7
SD		 1240
1241 return tfm;
34aedfee
DC		 1242fail:
1243 crypto_free_aead(tfm);
1244 return ERR_PTR(ret);
c09440f7
SD		 1245}
1246
1247static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1248 int icv_len)
1249{
1250 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1251 if (!rx_sa->stats)
34aedfee 1252 return -ENOMEM;
c09440f7
SD		 1253
1254 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1255 if (IS_ERR(rx_sa->key.tfm)) {
c09440f7 1256 free_percpu(rx_sa->stats);
34aedfee 1257 return PTR_ERR(rx_sa->key.tfm);
c09440f7
SD		 1258 }
1259
1260 rx_sa->active = false;
1261 rx_sa->next_pn = 1;
e187246f 1262 refcount_set(&rx_sa->refcnt, 1);
c09440f7
SD		 1263 spin_lock_init(&rx_sa->lock);
1264
1265 return 0;
1266}
1267
1268static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1269{
1270 rx_sa->active = false;
1271
1272 macsec_rxsa_put(rx_sa);
1273}
1274
1275static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1276{
1277 int i;
1278
1279 for (i = 0; i < MACSEC_NUM_AN; i++) {
1280 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1281
1282 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1283 if (sa)
1284 clear_rx_sa(sa);
1285 }
1286
1287 macsec_rxsc_put(rx_sc);
1288}
1289
1290static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1291{
1292 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1293
1294 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1295 rx_sc;
1296 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1297 if (rx_sc->sci == sci) {
1298 if (rx_sc->active)
1299 secy->n_rx_sc--;
1300 rcu_assign_pointer(*rx_scp, rx_sc->next);
1301 return rx_sc;
1302 }
1303 }
1304
1305 return NULL;
1306}
1307
1308static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1309{
1310 struct macsec_rx_sc *rx_sc;
1311 struct macsec_dev *macsec;
1312 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1313 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1314 struct macsec_secy *secy;
1315
1316 list_for_each_entry(macsec, &rxd->secys, secys) {
1317 if (find_rx_sc_rtnl(&macsec->secy, sci))
1318 return ERR_PTR(-EEXIST);
1319 }
1320
1321 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1322 if (!rx_sc)
1323 return ERR_PTR(-ENOMEM);
1324
1325 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1326 if (!rx_sc->stats) {
1327 kfree(rx_sc);
1328 return ERR_PTR(-ENOMEM);
1329 }
1330
1331 rx_sc->sci = sci;
1332 rx_sc->active = true;
8676d76f 1333 refcount_set(&rx_sc->refcnt, 1);
c09440f7
SD		 1334
1335 secy = &macsec_priv(dev)->secy;
1336 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1337 rcu_assign_pointer(secy->rx_sc, rx_sc);
1338
1339 if (rx_sc->active)
1340 secy->n_rx_sc++;
1341
1342 return rx_sc;
1343}
1344
1345static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1346 int icv_len)
1347{
1348 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1349 if (!tx_sa->stats)
34aedfee 1350 return -ENOMEM;
c09440f7
SD		 1351
1352 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1353 if (IS_ERR(tx_sa->key.tfm)) {
c09440f7 1354 free_percpu(tx_sa->stats);
34aedfee 1355 return PTR_ERR(tx_sa->key.tfm);
c09440f7
SD		 1356 }
1357
1358 tx_sa->active = false;
28206cdb 1359 refcount_set(&tx_sa->refcnt, 1);
c09440f7
SD		 1360 spin_lock_init(&tx_sa->lock);
1361
1362 return 0;
1363}
1364
1365static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1366{
1367 tx_sa->active = false;
1368
1369 macsec_txsa_put(tx_sa);
1370}
1371
489111e5 1372static struct genl_family macsec_fam;
c09440f7
SD		 1373
1374static struct net_device *get_dev_from_nl(struct net *net,
1375 struct nlattr **attrs)
1376{
1377 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1378 struct net_device *dev;
1379
1380 dev = __dev_get_by_index(net, ifindex);
1381 if (!dev)
1382 return ERR_PTR(-ENODEV);
1383
1384 if (!netif_is_macsec(dev))
1385 return ERR_PTR(-ENODEV);
1386
1387 return dev;
1388}
1389
1390static sci_t nla_get_sci(const struct nlattr *nla)
1391{
1392 return (__force sci_t)nla_get_u64(nla);
1393}
1394
f60d94c0
ND		 1395static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1396 int padattr)
c09440f7 1397{
f60d94c0 1398 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
c09440f7
SD		 1399}
1400
1401static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1402 struct nlattr **attrs,
1403 struct nlattr **tb_sa,
1404 struct net_device **devp,
1405 struct macsec_secy **secyp,
1406 struct macsec_tx_sc **scp,
1407 u8 *assoc_num)
1408{
1409 struct net_device *dev;
1410 struct macsec_secy *secy;
1411 struct macsec_tx_sc *tx_sc;
1412 struct macsec_tx_sa *tx_sa;
1413
1414 if (!tb_sa[MACSEC_SA_ATTR_AN])
1415 return ERR_PTR(-EINVAL);
1416
1417 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1418
1419 dev = get_dev_from_nl(net, attrs);
1420 if (IS_ERR(dev))
1421 return ERR_CAST(dev);
1422
1423 if (*assoc_num >= MACSEC_NUM_AN)
1424 return ERR_PTR(-EINVAL);
1425
1426 secy = &macsec_priv(dev)->secy;
1427 tx_sc = &secy->tx_sc;
1428
1429 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1430 if (!tx_sa)
1431 return ERR_PTR(-ENODEV);
1432
1433 *devp = dev;
1434 *scp = tx_sc;
1435 *secyp = secy;
1436 return tx_sa;
1437}
1438
1439static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1440 struct nlattr **attrs,
1441 struct nlattr **tb_rxsc,
1442 struct net_device **devp,
1443 struct macsec_secy **secyp)
1444{
1445 struct net_device *dev;
1446 struct macsec_secy *secy;
1447 struct macsec_rx_sc *rx_sc;
1448 sci_t sci;
1449
1450 dev = get_dev_from_nl(net, attrs);
1451 if (IS_ERR(dev))
1452 return ERR_CAST(dev);
1453
1454 secy = &macsec_priv(dev)->secy;
1455
1456 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1457 return ERR_PTR(-EINVAL);
1458
1459 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1460 rx_sc = find_rx_sc_rtnl(secy, sci);
1461 if (!rx_sc)
1462 return ERR_PTR(-ENODEV);
1463
1464 *secyp = secy;
1465 *devp = dev;
1466
1467 return rx_sc;
1468}
1469
1470static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1471 struct nlattr **attrs,
1472 struct nlattr **tb_rxsc,
1473 struct nlattr **tb_sa,
1474 struct net_device **devp,
1475 struct macsec_secy **secyp,
1476 struct macsec_rx_sc **scp,
1477 u8 *assoc_num)
1478{
1479 struct macsec_rx_sc *rx_sc;
1480 struct macsec_rx_sa *rx_sa;
1481
1482 if (!tb_sa[MACSEC_SA_ATTR_AN])
1483 return ERR_PTR(-EINVAL);
1484
1485 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1486 if (*assoc_num >= MACSEC_NUM_AN)
1487 return ERR_PTR(-EINVAL);
1488
1489 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1490 if (IS_ERR(rx_sc))
1491 return ERR_CAST(rx_sc);
1492
1493 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1494 if (!rx_sa)
1495 return ERR_PTR(-ENODEV);
1496
1497 *scp = rx_sc;
1498 return rx_sa;
1499}
1500
c09440f7
SD		 1501static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1502 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1503 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1504 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
dcb780fb 1505 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
c09440f7
SD		 1506};
1507
1508static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1509 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1510 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1511};
1512
1513static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1514 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1515 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1516 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
8acca6ac
SD		 1517 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1518 .len = MACSEC_KEYID_LEN, },
c09440f7 1519 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
e8660ded 1520 .len = MACSEC_MAX_KEY_LEN, },
c09440f7
SD		 1521};
1522
dcb780fb
AT		 1523static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1524 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1525};
1526
3cf3227a
AT		 1527/* Offloads an operation to a device driver */
1528static int macsec_offload(int (* const func)(struct macsec_context *),
1529 struct macsec_context *ctx)
1530{
1531 int ret;
1532
1533 if (unlikely(!func))
1534 return 0;
1535
1536 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1537 mutex_lock(&ctx->phydev->lock);
1538
1539 /* Phase I: prepare. The drive should fail here if there are going to be
1540 * issues in the commit phase.
1541 */
1542 ctx->prepare = true;
1543 ret = (*func)(ctx);
1544 if (ret)
1545 goto phy_unlock;
1546
1547 /* Phase II: commit. This step cannot fail. */
1548 ctx->prepare = false;
1549 ret = (*func)(ctx);
1550 /* This should never happen: commit is not allowed to fail */
1551 if (unlikely(ret))
1552 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1553
1554phy_unlock:
1555 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1556 mutex_unlock(&ctx->phydev->lock);
1557
1558 return ret;
1559}
1560
c09440f7
SD		 1561static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1562{
1563 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1564 return -EINVAL;
1565
8cb08174 1566 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
c09440f7
SD		 1567 return -EINVAL;
1568
1569 return 0;
1570}
1571
1572static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1573{
1574 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1575 return -EINVAL;
1576
8cb08174 1577 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
c09440f7
SD		 1578 return -EINVAL;
1579
1580 return 0;
1581}
1582
1583static bool validate_add_rxsa(struct nlattr **attrs)
1584{
1585 if (!attrs[MACSEC_SA_ATTR_AN] ||
1586 !attrs[MACSEC_SA_ATTR_KEY] ||
1587 !attrs[MACSEC_SA_ATTR_KEYID])
1588 return false;
1589
1590 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1591 return false;
1592
1593 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1594 return false;
1595
1596 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1597 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1598 return false;
1599 }
1600
8acca6ac
SD		 1601 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1602 return false;
1603
c09440f7
SD		 1604 return true;
1605}
1606
1607static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1608{
1609 struct net_device *dev;
1610 struct nlattr **attrs = info->attrs;
1611 struct macsec_secy *secy;
1612 struct macsec_rx_sc *rx_sc;
1613 struct macsec_rx_sa *rx_sa;
1614 unsigned char assoc_num;
1615 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1616 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1617 int err;
c09440f7
SD		 1618
1619 if (!attrs[MACSEC_ATTR_IFINDEX])
1620 return -EINVAL;
1621
1622 if (parse_sa_config(attrs, tb_sa))
1623 return -EINVAL;
1624
1625 if (parse_rxsc_config(attrs, tb_rxsc))
1626 return -EINVAL;
1627
1628 if (!validate_add_rxsa(tb_sa))
1629 return -EINVAL;
1630
1631 rtnl_lock();
1632 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
36b232c8 1633 if (IS_ERR(rx_sc)) {
c09440f7
SD		 1634 rtnl_unlock();
1635 return PTR_ERR(rx_sc);
1636 }
1637
1638 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1639
1640 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1641 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1642 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1643 rtnl_unlock();
1644 return -EINVAL;
1645 }
1646
1647 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1648 if (rx_sa) {
1649 rtnl_unlock();
1650 return -EBUSY;
1651 }
1652
1653 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
34aedfee 1654 if (!rx_sa) {
c09440f7
SD		 1655 rtnl_unlock();
1656 return -ENOMEM;
1657 }
1658
34aedfee
DC		 1659 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1660 secy->key_len, secy->icv_len);
1661 if (err < 0) {
1662 kfree(rx_sa);
1663 rtnl_unlock();
1664 return err;
1665 }
1666
c09440f7
SD		 1667 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1668 spin_lock_bh(&rx_sa->lock);
1669 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1670 spin_unlock_bh(&rx_sa->lock);
1671 }
1672
1673 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1674 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1675
c09440f7 1676 rx_sa->sc = rx_sc;
3cf3227a
AT		 1677
1678 /* If h/w offloading is available, propagate to the device */
1679 if (macsec_is_offloaded(netdev_priv(dev))) {
1680 const struct macsec_ops *ops;
1681 struct macsec_context ctx;
1682
1683 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1684 if (!ops) {
1685 err = -EOPNOTSUPP;
1686 goto cleanup;
1687 }
1688
1689 ctx.sa.assoc_num = assoc_num;
1690 ctx.sa.rx_sa = rx_sa;
1691 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1692 MACSEC_KEYID_LEN);
1693
1694 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1695 if (err)
1696 goto cleanup;
1697 }
1698
1699 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1700 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1701
1702 rtnl_unlock();
1703
1704 return 0;
3cf3227a
AT		 1705
1706cleanup:
1707 kfree(rx_sa);
1708 rtnl_unlock();
1709 return err;
c09440f7
SD		 1710}
1711
1712static bool validate_add_rxsc(struct nlattr **attrs)
1713{
1714 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1715 return false;
1716
1717 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1718 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1719 return false;
1720 }
1721
1722 return true;
1723}
1724
1725static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1726{
1727 struct net_device *dev;
1728 sci_t sci = MACSEC_UNDEF_SCI;
1729 struct nlattr **attrs = info->attrs;
1730 struct macsec_rx_sc *rx_sc;
1731 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a
AT		 1732 bool was_active;
1733 int ret;
c09440f7
SD		 1734
1735 if (!attrs[MACSEC_ATTR_IFINDEX])
1736 return -EINVAL;
1737
1738 if (parse_rxsc_config(attrs, tb_rxsc))
1739 return -EINVAL;
1740
1741 if (!validate_add_rxsc(tb_rxsc))
1742 return -EINVAL;
1743
1744 rtnl_lock();
1745 dev = get_dev_from_nl(genl_info_net(info), attrs);
1746 if (IS_ERR(dev)) {
1747 rtnl_unlock();
1748 return PTR_ERR(dev);
1749 }
1750
1751 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1752
1753 rx_sc = create_rx_sc(dev, sci);
1754 if (IS_ERR(rx_sc)) {
1755 rtnl_unlock();
1756 return PTR_ERR(rx_sc);
1757 }
1758
3cf3227a 1759 was_active = rx_sc->active;
c09440f7
SD		 1760 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1761 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1762
3cf3227a
AT		 1763 if (macsec_is_offloaded(netdev_priv(dev))) {
1764 const struct macsec_ops *ops;
1765 struct macsec_context ctx;
1766
1767 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1768 if (!ops) {
1769 ret = -EOPNOTSUPP;
1770 goto cleanup;
1771 }
1772
1773 ctx.rx_sc = rx_sc;
1774
1775 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1776 if (ret)
1777 goto cleanup;
1778 }
1779
c09440f7
SD		 1780 rtnl_unlock();
1781
1782 return 0;
3cf3227a
AT		 1783
1784cleanup:
1785 rx_sc->active = was_active;
1786 rtnl_unlock();
1787 return ret;
c09440f7
SD		 1788}
1789
1790static bool validate_add_txsa(struct nlattr **attrs)
1791{
1792 if (!attrs[MACSEC_SA_ATTR_AN] ||
1793 !attrs[MACSEC_SA_ATTR_PN] ||
1794 !attrs[MACSEC_SA_ATTR_KEY] ||
1795 !attrs[MACSEC_SA_ATTR_KEYID])
1796 return false;
1797
1798 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1799 return false;
1800
1801 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1802 return false;
1803
1804 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1805 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1806 return false;
1807 }
1808
8acca6ac
SD		 1809 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1810 return false;
1811
c09440f7
SD		 1812 return true;
1813}
1814
1815static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1816{
1817 struct net_device *dev;
1818 struct nlattr **attrs = info->attrs;
1819 struct macsec_secy *secy;
1820 struct macsec_tx_sc *tx_sc;
1821 struct macsec_tx_sa *tx_sa;
1822 unsigned char assoc_num;
1823 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 1824 bool was_operational;
34aedfee 1825 int err;
c09440f7
SD		 1826
1827 if (!attrs[MACSEC_ATTR_IFINDEX])
1828 return -EINVAL;
1829
1830 if (parse_sa_config(attrs, tb_sa))
1831 return -EINVAL;
1832
1833 if (!validate_add_txsa(tb_sa))
1834 return -EINVAL;
1835
1836 rtnl_lock();
1837 dev = get_dev_from_nl(genl_info_net(info), attrs);
1838 if (IS_ERR(dev)) {
1839 rtnl_unlock();
1840 return PTR_ERR(dev);
1841 }
1842
1843 secy = &macsec_priv(dev)->secy;
1844 tx_sc = &secy->tx_sc;
1845
1846 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1847
1848 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1849 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1850 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1851 rtnl_unlock();
1852 return -EINVAL;
1853 }
1854
1855 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1856 if (tx_sa) {
1857 rtnl_unlock();
1858 return -EBUSY;
1859 }
1860
1861 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
34aedfee 1862 if (!tx_sa) {
c09440f7
SD		 1863 rtnl_unlock();
1864 return -ENOMEM;
1865 }
1866
34aedfee
DC		 1867 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1868 secy->key_len, secy->icv_len);
1869 if (err < 0) {
1870 kfree(tx_sa);
1871 rtnl_unlock();
1872 return err;
1873 }
1874
c09440f7
SD		 1875 spin_lock_bh(&tx_sa->lock);
1876 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1877 spin_unlock_bh(&tx_sa->lock);
1878
1879 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1880 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1881
3cf3227a 1882 was_operational = secy->operational;
c09440f7
SD		 1883 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1884 secy->operational = true;
1885
3cf3227a
AT		 1886 /* If h/w offloading is available, propagate to the device */
1887 if (macsec_is_offloaded(netdev_priv(dev))) {
1888 const struct macsec_ops *ops;
1889 struct macsec_context ctx;
1890
1891 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1892 if (!ops) {
1893 err = -EOPNOTSUPP;
1894 goto cleanup;
1895 }
1896
1897 ctx.sa.assoc_num = assoc_num;
1898 ctx.sa.tx_sa = tx_sa;
1899 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1900 MACSEC_KEYID_LEN);
1901
1902 err = macsec_offload(ops->mdo_add_txsa, &ctx);
1903 if (err)
1904 goto cleanup;
1905 }
1906
1907 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1908 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1909
1910 rtnl_unlock();
1911
1912 return 0;
3cf3227a
AT		 1913
1914cleanup:
1915 secy->operational = was_operational;
1916 kfree(tx_sa);
1917 rtnl_unlock();
1918 return err;
c09440f7
SD		 1919}
1920
1921static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1922{
1923 struct nlattr **attrs = info->attrs;
1924 struct net_device *dev;
1925 struct macsec_secy *secy;
1926 struct macsec_rx_sc *rx_sc;
1927 struct macsec_rx_sa *rx_sa;
1928 u8 assoc_num;
1929 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1930 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 1931 int ret;
c09440f7
SD		 1932
1933 if (!attrs[MACSEC_ATTR_IFINDEX])
1934 return -EINVAL;
1935
1936 if (parse_sa_config(attrs, tb_sa))
1937 return -EINVAL;
1938
1939 if (parse_rxsc_config(attrs, tb_rxsc))
1940 return -EINVAL;
1941
1942 rtnl_lock();
1943 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1944 &dev, &secy, &rx_sc, &assoc_num);
1945 if (IS_ERR(rx_sa)) {
1946 rtnl_unlock();
1947 return PTR_ERR(rx_sa);
1948 }
1949
1950 if (rx_sa->active) {
1951 rtnl_unlock();
1952 return -EBUSY;
1953 }
1954
3cf3227a
AT		 1955 /* If h/w offloading is available, propagate to the device */
1956 if (macsec_is_offloaded(netdev_priv(dev))) {
1957 const struct macsec_ops *ops;
1958 struct macsec_context ctx;
1959
1960 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1961 if (!ops) {
1962 ret = -EOPNOTSUPP;
1963 goto cleanup;
1964 }
1965
1966 ctx.sa.assoc_num = assoc_num;
1967 ctx.sa.rx_sa = rx_sa;
1968
1969 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
1970 if (ret)
1971 goto cleanup;
1972 }
1973
c09440f7
SD		 1974 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1975 clear_rx_sa(rx_sa);
1976
1977 rtnl_unlock();
1978
1979 return 0;
3cf3227a
AT		 1980
1981cleanup:
1982 rtnl_unlock();
1983 return ret;
c09440f7
SD		 1984}
1985
1986static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1987{
1988 struct nlattr **attrs = info->attrs;
1989 struct net_device *dev;
1990 struct macsec_secy *secy;
1991 struct macsec_rx_sc *rx_sc;
1992 sci_t sci;
1993 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a 1994 int ret;
c09440f7
SD		 1995
1996 if (!attrs[MACSEC_ATTR_IFINDEX])
1997 return -EINVAL;
1998
1999 if (parse_rxsc_config(attrs, tb_rxsc))
2000 return -EINVAL;
2001
2002 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2003 return -EINVAL;
2004
2005 rtnl_lock();
2006 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2007 if (IS_ERR(dev)) {
2008 rtnl_unlock();
2009 return PTR_ERR(dev);
2010 }
2011
2012 secy = &macsec_priv(dev)->secy;
2013 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2014
2015 rx_sc = del_rx_sc(secy, sci);
2016 if (!rx_sc) {
2017 rtnl_unlock();
2018 return -ENODEV;
2019 }
2020
3cf3227a
AT		 2021 /* If h/w offloading is available, propagate to the device */
2022 if (macsec_is_offloaded(netdev_priv(dev))) {
2023 const struct macsec_ops *ops;
2024 struct macsec_context ctx;
2025
2026 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2027 if (!ops) {
2028 ret = -EOPNOTSUPP;
2029 goto cleanup;
2030 }
2031
2032 ctx.rx_sc = rx_sc;
2033 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2034 if (ret)
2035 goto cleanup;
2036 }
2037
c09440f7
SD		 2038 free_rx_sc(rx_sc);
2039 rtnl_unlock();
2040
2041 return 0;
3cf3227a
AT		 2042
2043cleanup:
2044 rtnl_unlock();
2045 return ret;
c09440f7
SD		 2046}
2047
2048static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2049{
2050 struct nlattr **attrs = info->attrs;
2051 struct net_device *dev;
2052 struct macsec_secy *secy;
2053 struct macsec_tx_sc *tx_sc;
2054 struct macsec_tx_sa *tx_sa;
2055 u8 assoc_num;
2056 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2057 int ret;
c09440f7
SD		 2058
2059 if (!attrs[MACSEC_ATTR_IFINDEX])
2060 return -EINVAL;
2061
2062 if (parse_sa_config(attrs, tb_sa))
2063 return -EINVAL;
2064
2065 rtnl_lock();
2066 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2067 &dev, &secy, &tx_sc, &assoc_num);
2068 if (IS_ERR(tx_sa)) {
2069 rtnl_unlock();
2070 return PTR_ERR(tx_sa);
2071 }
2072
2073 if (tx_sa->active) {
2074 rtnl_unlock();
2075 return -EBUSY;
2076 }
2077
3cf3227a
AT		 2078 /* If h/w offloading is available, propagate to the device */
2079 if (macsec_is_offloaded(netdev_priv(dev))) {
2080 const struct macsec_ops *ops;
2081 struct macsec_context ctx;
2082
2083 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2084 if (!ops) {
2085 ret = -EOPNOTSUPP;
2086 goto cleanup;
2087 }
2088
2089 ctx.sa.assoc_num = assoc_num;
2090 ctx.sa.tx_sa = tx_sa;
2091
2092 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2093 if (ret)
2094 goto cleanup;
2095 }
2096
c09440f7
SD		 2097 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2098 clear_tx_sa(tx_sa);
2099
2100 rtnl_unlock();
2101
2102 return 0;
3cf3227a
AT		 2103
2104cleanup:
2105 rtnl_unlock();
2106 return ret;
c09440f7
SD		 2107}
2108
2109static bool validate_upd_sa(struct nlattr **attrs)
2110{
2111 if (!attrs[MACSEC_SA_ATTR_AN] ||
2112 attrs[MACSEC_SA_ATTR_KEY] ||
2113 attrs[MACSEC_SA_ATTR_KEYID])
2114 return false;
2115
2116 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2117 return false;
2118
2119 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2120 return false;
2121
2122 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2123 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2124 return false;
2125 }
2126
2127 return true;
2128}
2129
2130static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2131{
2132 struct nlattr **attrs = info->attrs;
2133 struct net_device *dev;
2134 struct macsec_secy *secy;
2135 struct macsec_tx_sc *tx_sc;
2136 struct macsec_tx_sa *tx_sa;
2137 u8 assoc_num;
2138 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a
AT		 2139 bool was_operational, was_active;
2140 u32 prev_pn = 0;
2141 int ret = 0;
c09440f7
SD		 2142
2143 if (!attrs[MACSEC_ATTR_IFINDEX])
2144 return -EINVAL;
2145
2146 if (parse_sa_config(attrs, tb_sa))
2147 return -EINVAL;
2148
2149 if (!validate_upd_sa(tb_sa))
2150 return -EINVAL;
2151
2152 rtnl_lock();
2153 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2154 &dev, &secy, &tx_sc, &assoc_num);
2155 if (IS_ERR(tx_sa)) {
2156 rtnl_unlock();
2157 return PTR_ERR(tx_sa);
2158 }
2159
2160 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2161 spin_lock_bh(&tx_sa->lock);
3cf3227a 2162 prev_pn = tx_sa->next_pn;
c09440f7
SD		 2163 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2164 spin_unlock_bh(&tx_sa->lock);
2165 }
2166
3cf3227a 2167 was_active = tx_sa->active;
c09440f7
SD		 2168 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2169 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2170
3cf3227a 2171 was_operational = secy->operational;
c09440f7
SD		 2172 if (assoc_num == tx_sc->encoding_sa)
2173 secy->operational = tx_sa->active;
2174
3cf3227a
AT		 2175 /* If h/w offloading is available, propagate to the device */
2176 if (macsec_is_offloaded(netdev_priv(dev))) {
2177 const struct macsec_ops *ops;
2178 struct macsec_context ctx;
2179
2180 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2181 if (!ops) {
2182 ret = -EOPNOTSUPP;
2183 goto cleanup;
2184 }
2185
2186 ctx.sa.assoc_num = assoc_num;
2187 ctx.sa.tx_sa = tx_sa;
2188
2189 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2190 if (ret)
2191 goto cleanup;
2192 }
2193
c09440f7
SD		 2194 rtnl_unlock();
2195
2196 return 0;
3cf3227a
AT		 2197
2198cleanup:
2199 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2200 spin_lock_bh(&tx_sa->lock);
2201 tx_sa->next_pn = prev_pn;
2202 spin_unlock_bh(&tx_sa->lock);
2203 }
2204 tx_sa->active = was_active;
2205 secy->operational = was_operational;
2206 rtnl_unlock();
2207 return ret;
c09440f7
SD		 2208}
2209
2210static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2211{
2212 struct nlattr **attrs = info->attrs;
2213 struct net_device *dev;
2214 struct macsec_secy *secy;
2215 struct macsec_rx_sc *rx_sc;
2216 struct macsec_rx_sa *rx_sa;
2217 u8 assoc_num;
2218 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2219 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a
AT		 2220 bool was_active;
2221 u32 prev_pn = 0;
2222 int ret = 0;
c09440f7
SD		 2223
2224 if (!attrs[MACSEC_ATTR_IFINDEX])
2225 return -EINVAL;
2226
2227 if (parse_rxsc_config(attrs, tb_rxsc))
2228 return -EINVAL;
2229
2230 if (parse_sa_config(attrs, tb_sa))
2231 return -EINVAL;
2232
2233 if (!validate_upd_sa(tb_sa))
2234 return -EINVAL;
2235
2236 rtnl_lock();
2237 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2238 &dev, &secy, &rx_sc, &assoc_num);
2239 if (IS_ERR(rx_sa)) {
2240 rtnl_unlock();
2241 return PTR_ERR(rx_sa);
2242 }
2243
2244 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2245 spin_lock_bh(&rx_sa->lock);
3cf3227a 2246 prev_pn = rx_sa->next_pn;
c09440f7
SD		 2247 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2248 spin_unlock_bh(&rx_sa->lock);
2249 }
2250
3cf3227a 2251 was_active = rx_sa->active;
c09440f7
SD		 2252 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2253 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2254
3cf3227a
AT		 2255 /* If h/w offloading is available, propagate to the device */
2256 if (macsec_is_offloaded(netdev_priv(dev))) {
2257 const struct macsec_ops *ops;
2258 struct macsec_context ctx;
2259
2260 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2261 if (!ops) {
2262 ret = -EOPNOTSUPP;
2263 goto cleanup;
2264 }
2265
2266 ctx.sa.assoc_num = assoc_num;
2267 ctx.sa.rx_sa = rx_sa;
2268
2269 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2270 if (ret)
2271 goto cleanup;
2272 }
2273
c09440f7
SD		 2274 rtnl_unlock();
2275 return 0;
3cf3227a
AT		 2276
2277cleanup:
2278 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2279 spin_lock_bh(&rx_sa->lock);
2280 rx_sa->next_pn = prev_pn;
2281 spin_unlock_bh(&rx_sa->lock);
2282 }
2283 rx_sa->active = was_active;
2284 rtnl_unlock();
2285 return ret;
c09440f7
SD		 2286}
2287
2288static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2289{
2290 struct nlattr **attrs = info->attrs;
2291 struct net_device *dev;
2292 struct macsec_secy *secy;
2293 struct macsec_rx_sc *rx_sc;
2294 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a
AT		 2295 unsigned int prev_n_rx_sc;
2296 bool was_active;
2297 int ret;
c09440f7
SD		 2298
2299 if (!attrs[MACSEC_ATTR_IFINDEX])
2300 return -EINVAL;
2301
2302 if (parse_rxsc_config(attrs, tb_rxsc))
2303 return -EINVAL;
2304
2305 if (!validate_add_rxsc(tb_rxsc))
2306 return -EINVAL;
2307
2308 rtnl_lock();
2309 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2310 if (IS_ERR(rx_sc)) {
2311 rtnl_unlock();
2312 return PTR_ERR(rx_sc);
2313 }
2314
3cf3227a
AT		 2315 was_active = rx_sc->active;
2316 prev_n_rx_sc = secy->n_rx_sc;
c09440f7
SD		 2317 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2318 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2319
2320 if (rx_sc->active != new)
2321 secy->n_rx_sc += new ? 1 : -1;
2322
2323 rx_sc->active = new;
2324 }
2325
3cf3227a
AT		 2326 /* If h/w offloading is available, propagate to the device */
2327 if (macsec_is_offloaded(netdev_priv(dev))) {
2328 const struct macsec_ops *ops;
2329 struct macsec_context ctx;
2330
2331 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2332 if (!ops) {
2333 ret = -EOPNOTSUPP;
2334 goto cleanup;
2335 }
2336
2337 ctx.rx_sc = rx_sc;
2338
2339 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2340 if (ret)
2341 goto cleanup;
2342 }
2343
c09440f7
SD		 2344 rtnl_unlock();
2345
2346 return 0;
3cf3227a
AT		 2347
2348cleanup:
2349 secy->n_rx_sc = prev_n_rx_sc;
2350 rx_sc->active = was_active;
2351 rtnl_unlock();
2352 return ret;
c09440f7
SD		 2353}
2354
dcb780fb
AT		 2355static bool macsec_is_configured(struct macsec_dev *macsec)
2356{
2357 struct macsec_secy *secy = &macsec->secy;
2358 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2359 int i;
2360
2361 if (secy->n_rx_sc > 0)
2362 return true;
2363
2364 for (i = 0; i < MACSEC_NUM_AN; i++)
2365 if (tx_sc->sa[i])
2366 return true;
2367
2368 return false;
2369}
2370
2371static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2372{
2373 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2374 enum macsec_offload offload, prev_offload;
2375 int (*func)(struct macsec_context *ctx);
2376 struct nlattr **attrs = info->attrs;
2377 struct net_device *dev, *loop_dev;
2378 const struct macsec_ops *ops;
2379 struct macsec_context ctx;
2380 struct macsec_dev *macsec;
2381 struct net *loop_net;
2382 int ret;
2383
2384 if (!attrs[MACSEC_ATTR_IFINDEX])
2385 return -EINVAL;
2386
2387 if (!attrs[MACSEC_ATTR_OFFLOAD])
2388 return -EINVAL;
2389
2390 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2391 attrs[MACSEC_ATTR_OFFLOAD],
2392 macsec_genl_offload_policy, NULL))
2393 return -EINVAL;
2394
2395 dev = get_dev_from_nl(genl_info_net(info), attrs);
2396 if (IS_ERR(dev))
2397 return PTR_ERR(dev);
2398 macsec = macsec_priv(dev);
2399
2400 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2401 if (macsec->offload == offload)
2402 return 0;
2403
2404 /* Check if the offloading mode is supported by the underlying layers */
2405 if (offload != MACSEC_OFFLOAD_OFF &&
2406 !macsec_check_offload(offload, macsec))
2407 return -EOPNOTSUPP;
2408
2409 if (offload == MACSEC_OFFLOAD_OFF)
2410 goto skip_limitation;
2411
2412 /* Check the physical interface isn't offloading another interface
2413 * first.
2414 */
2415 for_each_net(loop_net) {
2416 for_each_netdev(loop_net, loop_dev) {
2417 struct macsec_dev *priv;
2418
2419 if (!netif_is_macsec(loop_dev))
2420 continue;
2421
2422 priv = macsec_priv(loop_dev);
2423
2424 if (priv->real_dev == macsec->real_dev &&
2425 priv->offload != MACSEC_OFFLOAD_OFF)
2426 return -EBUSY;
2427 }
2428 }
2429
2430skip_limitation:
2431 /* Check if the net device is busy. */
2432 if (netif_running(dev))
2433 return -EBUSY;
2434
2435 rtnl_lock();
2436
2437 prev_offload = macsec->offload;
2438 macsec->offload = offload;
2439
2440 /* Check if the device already has rules configured: we do not support
2441 * rules migration.
2442 */
2443 if (macsec_is_configured(macsec)) {
2444 ret = -EBUSY;
2445 goto rollback;
2446 }
2447
2448 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2449 macsec, &ctx);
2450 if (!ops) {
2451 ret = -EOPNOTSUPP;
2452 goto rollback;
2453 }
2454
2455 if (prev_offload == MACSEC_OFFLOAD_OFF)
2456 func = ops->mdo_add_secy;
2457 else
2458 func = ops->mdo_del_secy;
2459
2460 ctx.secy = &macsec->secy;
2461 ret = macsec_offload(func, &ctx);
2462 if (ret)
2463 goto rollback;
2464
2465 rtnl_unlock();
2466 return 0;
2467
2468rollback:
2469 macsec->offload = prev_offload;
2470
2471 rtnl_unlock();
2472 return ret;
2473}
2474
c09440f7 2475static int copy_tx_sa_stats(struct sk_buff *skb,
7979472b 2476 struct macsec_tx_sa_stats __percpu *pstats)
c09440f7
SD		 2477{
2478 struct macsec_tx_sa_stats sum = {0, };
2479 int cpu;
2480
2481 for_each_possible_cpu(cpu) {
2482 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2483
2484 sum.OutPktsProtected += stats->OutPktsProtected;
2485 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2486 }
2487
2488 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2489 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2490 return -EMSGSIZE;
2491
2492 return 0;
2493}
2494
e1427237
FW		 2495static noinline_for_stack int
2496copy_rx_sa_stats(struct sk_buff *skb,
2497 struct macsec_rx_sa_stats __percpu *pstats)
c09440f7
SD		 2498{
2499 struct macsec_rx_sa_stats sum = {0, };
2500 int cpu;
2501
2502 for_each_possible_cpu(cpu) {
2503 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2504
2505 sum.InPktsOK += stats->InPktsOK;
2506 sum.InPktsInvalid += stats->InPktsInvalid;
2507 sum.InPktsNotValid += stats->InPktsNotValid;
2508 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2509 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2510 }
2511
2512 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2513 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2514 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2515 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2516 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2517 return -EMSGSIZE;
2518
2519 return 0;
2520}
2521
e1427237
FW		 2522static noinline_for_stack int
2523copy_rx_sc_stats(struct sk_buff *skb, struct pcpu_rx_sc_stats __percpu *pstats)
c09440f7
SD		 2524{
2525 struct macsec_rx_sc_stats sum = {0, };
2526 int cpu;
2527
2528 for_each_possible_cpu(cpu) {
2529 const struct pcpu_rx_sc_stats *stats;
2530 struct macsec_rx_sc_stats tmp;
2531 unsigned int start;
2532
2533 stats = per_cpu_ptr(pstats, cpu);
2534 do {
2535 start = u64_stats_fetch_begin_irq(&stats->syncp);
2536 memcpy(&tmp, &stats->stats, sizeof(tmp));
2537 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2538
2539 sum.InOctetsValidated += tmp.InOctetsValidated;
2540 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2541 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2542 sum.InPktsDelayed += tmp.InPktsDelayed;
2543 sum.InPktsOK += tmp.InPktsOK;
2544 sum.InPktsInvalid += tmp.InPktsInvalid;
2545 sum.InPktsLate += tmp.InPktsLate;
2546 sum.InPktsNotValid += tmp.InPktsNotValid;
2547 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2548 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2549 }
2550
f60d94c0
ND		 2551 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2552 sum.InOctetsValidated,
2553 MACSEC_RXSC_STATS_ATTR_PAD) ||
2554 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2555 sum.InOctetsDecrypted,
2556 MACSEC_RXSC_STATS_ATTR_PAD) ||
2557 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2558 sum.InPktsUnchecked,
2559 MACSEC_RXSC_STATS_ATTR_PAD) ||
2560 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2561 sum.InPktsDelayed,
2562 MACSEC_RXSC_STATS_ATTR_PAD) ||
2563 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2564 sum.InPktsOK,
2565 MACSEC_RXSC_STATS_ATTR_PAD) ||
2566 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2567 sum.InPktsInvalid,
2568 MACSEC_RXSC_STATS_ATTR_PAD) ||
2569 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2570 sum.InPktsLate,
2571 MACSEC_RXSC_STATS_ATTR_PAD) ||
2572 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2573 sum.InPktsNotValid,
2574 MACSEC_RXSC_STATS_ATTR_PAD) ||
2575 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2576 sum.InPktsNotUsingSA,
2577 MACSEC_RXSC_STATS_ATTR_PAD) ||
2578 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2579 sum.InPktsUnusedSA,
2580 MACSEC_RXSC_STATS_ATTR_PAD))
c09440f7
SD		 2581 return -EMSGSIZE;
2582
2583 return 0;
2584}
2585
e1427237
FW		 2586static noinline_for_stack int
2587copy_tx_sc_stats(struct sk_buff *skb, struct pcpu_tx_sc_stats __percpu *pstats)
c09440f7
SD		 2588{
2589 struct macsec_tx_sc_stats sum = {0, };
2590 int cpu;
2591
2592 for_each_possible_cpu(cpu) {
2593 const struct pcpu_tx_sc_stats *stats;
2594 struct macsec_tx_sc_stats tmp;
2595 unsigned int start;
2596
2597 stats = per_cpu_ptr(pstats, cpu);
2598 do {
2599 start = u64_stats_fetch_begin_irq(&stats->syncp);
2600 memcpy(&tmp, &stats->stats, sizeof(tmp));
2601 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2602
2603 sum.OutPktsProtected += tmp.OutPktsProtected;
2604 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2605 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2606 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2607 }
2608
f60d94c0
ND		 2609 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2610 sum.OutPktsProtected,
2611 MACSEC_TXSC_STATS_ATTR_PAD) ||
2612 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2613 sum.OutPktsEncrypted,
2614 MACSEC_TXSC_STATS_ATTR_PAD) ||
2615 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2616 sum.OutOctetsProtected,
2617 MACSEC_TXSC_STATS_ATTR_PAD) ||
2618 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2619 sum.OutOctetsEncrypted,
2620 MACSEC_TXSC_STATS_ATTR_PAD))
c09440f7
SD		 2621 return -EMSGSIZE;
2622
2623 return 0;
2624}
2625
e1427237
FW		 2626static noinline_for_stack int
2627copy_secy_stats(struct sk_buff *skb, struct pcpu_secy_stats __percpu *pstats)
c09440f7
SD		 2628{
2629 struct macsec_dev_stats sum = {0, };
2630 int cpu;
2631
2632 for_each_possible_cpu(cpu) {
2633 const struct pcpu_secy_stats *stats;
2634 struct macsec_dev_stats tmp;
2635 unsigned int start;
2636
2637 stats = per_cpu_ptr(pstats, cpu);
2638 do {
2639 start = u64_stats_fetch_begin_irq(&stats->syncp);
2640 memcpy(&tmp, &stats->stats, sizeof(tmp));
2641 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2642
2643 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2644 sum.InPktsUntagged += tmp.InPktsUntagged;
2645 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2646 sum.InPktsNoTag += tmp.InPktsNoTag;
2647 sum.InPktsBadTag += tmp.InPktsBadTag;
2648 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2649 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2650 sum.InPktsOverrun += tmp.InPktsOverrun;
2651 }
2652
f60d94c0
ND		 2653 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2654 sum.OutPktsUntagged,
2655 MACSEC_SECY_STATS_ATTR_PAD) ||
2656 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2657 sum.InPktsUntagged,
2658 MACSEC_SECY_STATS_ATTR_PAD) ||
2659 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2660 sum.OutPktsTooLong,
2661 MACSEC_SECY_STATS_ATTR_PAD) ||
2662 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2663 sum.InPktsNoTag,
2664 MACSEC_SECY_STATS_ATTR_PAD) ||
2665 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2666 sum.InPktsBadTag,
2667 MACSEC_SECY_STATS_ATTR_PAD) ||
2668 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2669 sum.InPktsUnknownSCI,
2670 MACSEC_SECY_STATS_ATTR_PAD) ||
2671 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2672 sum.InPktsNoSCI,
2673 MACSEC_SECY_STATS_ATTR_PAD) ||
2674 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2675 sum.InPktsOverrun,
2676 MACSEC_SECY_STATS_ATTR_PAD))
c09440f7
SD		 2677 return -EMSGSIZE;
2678
2679 return 0;
2680}
2681
2682static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2683{
2684 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ae0be8de
MK		 2685 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2686 MACSEC_ATTR_SECY);
ccfdec90 2687 u64 csid;
c09440f7
SD		 2688
2689 if (!secy_nest)
2690 return 1;
2691
ccfdec90
FW		 2692 switch (secy->key_len) {
2693 case MACSEC_GCM_AES_128_SAK_LEN:
e8660ded 2694 csid = MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 2695 break;
2696 case MACSEC_GCM_AES_256_SAK_LEN:
2697 csid = MACSEC_CIPHER_ID_GCM_AES_256;
2698 break;
2699 default:
2700 goto cancel;
2701 }
2702
f60d94c0
ND		 2703 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2704 MACSEC_SECY_ATTR_PAD) ||
2705 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
ccfdec90 2706 csid, MACSEC_SECY_ATTR_PAD) ||
c09440f7
SD		 2707 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2708 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2709 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2710 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2711 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2712 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2713 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2714 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2715 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2716 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2717 goto cancel;
2718
2719 if (secy->replay_protect) {
2720 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2721 goto cancel;
2722 }
2723
2724 nla_nest_end(skb, secy_nest);
2725 return 0;
2726
2727cancel:
2728 nla_nest_cancel(skb, secy_nest);
2729 return 1;
2730}
2731
e1427237
FW		 2732static noinline_for_stack int
2733dump_secy(struct macsec_secy *secy, struct net_device *dev,
2734 struct sk_buff *skb, struct netlink_callback *cb)
c09440f7 2735{
dcb780fb 2736 struct macsec_dev *macsec = netdev_priv(dev);
c09440f7
SD		 2737 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2738 struct nlattr *txsa_list, *rxsc_list;
dcb780fb 2739 struct macsec_rx_sc *rx_sc;
c09440f7 2740 struct nlattr *attr;
dcb780fb
AT		 2741 void *hdr;
2742 int i, j;
c09440f7
SD		 2743
2744 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2745 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2746 if (!hdr)
2747 return -EMSGSIZE;
2748
0a833c29 2749 genl_dump_check_consistent(cb, hdr);
c09440f7
SD		 2750
2751 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2752 goto nla_put_failure;
2753
dcb780fb
AT		 2754 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
2755 if (!attr)
2756 goto nla_put_failure;
2757 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
2758 goto nla_put_failure;
2759 nla_nest_end(skb, attr);
2760
c09440f7
SD		 2761 if (nla_put_secy(secy, skb))
2762 goto nla_put_failure;
2763
ae0be8de 2764 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
c09440f7
SD		 2765 if (!attr)
2766 goto nla_put_failure;
2767 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2768 nla_nest_cancel(skb, attr);
2769 goto nla_put_failure;
2770 }
2771 nla_nest_end(skb, attr);
2772
ae0be8de 2773 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
c09440f7
SD		 2774 if (!attr)
2775 goto nla_put_failure;
2776 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2777 nla_nest_cancel(skb, attr);
2778 goto nla_put_failure;
2779 }
2780 nla_nest_end(skb, attr);
2781
ae0be8de 2782 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
c09440f7
SD		 2783 if (!txsa_list)
2784 goto nla_put_failure;
2785 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2786 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2787 struct nlattr *txsa_nest;
2788
2789 if (!tx_sa)
2790 continue;
2791
ae0be8de 2792 txsa_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 2793 if (!txsa_nest) {
2794 nla_nest_cancel(skb, txsa_list);
2795 goto nla_put_failure;
2796 }
2797
2798 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2799 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
8acca6ac 2800 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
c09440f7
SD		 2801 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2802 nla_nest_cancel(skb, txsa_nest);
2803 nla_nest_cancel(skb, txsa_list);
2804 goto nla_put_failure;
2805 }
2806
ae0be8de 2807 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
c09440f7
SD		 2808 if (!attr) {
2809 nla_nest_cancel(skb, txsa_nest);
2810 nla_nest_cancel(skb, txsa_list);
2811 goto nla_put_failure;
2812 }
2813 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2814 nla_nest_cancel(skb, attr);
2815 nla_nest_cancel(skb, txsa_nest);
2816 nla_nest_cancel(skb, txsa_list);
2817 goto nla_put_failure;
2818 }
2819 nla_nest_end(skb, attr);
2820
2821 nla_nest_end(skb, txsa_nest);
2822 }
2823 nla_nest_end(skb, txsa_list);
2824
ae0be8de 2825 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
c09440f7
SD		 2826 if (!rxsc_list)
2827 goto nla_put_failure;
2828
2829 j = 1;
2830 for_each_rxsc_rtnl(secy, rx_sc) {
2831 int k;
2832 struct nlattr *rxsa_list;
ae0be8de 2833 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 2834
2835 if (!rxsc_nest) {
2836 nla_nest_cancel(skb, rxsc_list);
2837 goto nla_put_failure;
2838 }
2839
2840 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
f60d94c0
ND		 2841 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2842 MACSEC_RXSC_ATTR_PAD)) {
c09440f7
SD		 2843 nla_nest_cancel(skb, rxsc_nest);
2844 nla_nest_cancel(skb, rxsc_list);
2845 goto nla_put_failure;
2846 }
2847
ae0be8de 2848 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
c09440f7
SD		 2849 if (!attr) {
2850 nla_nest_cancel(skb, rxsc_nest);
2851 nla_nest_cancel(skb, rxsc_list);
2852 goto nla_put_failure;
2853 }
2854 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2855 nla_nest_cancel(skb, attr);
2856 nla_nest_cancel(skb, rxsc_nest);
2857 nla_nest_cancel(skb, rxsc_list);
2858 goto nla_put_failure;
2859 }
2860 nla_nest_end(skb, attr);
2861
ae0be8de
MK		 2862 rxsa_list = nla_nest_start_noflag(skb,
2863 MACSEC_RXSC_ATTR_SA_LIST);
c09440f7
SD		 2864 if (!rxsa_list) {
2865 nla_nest_cancel(skb, rxsc_nest);
2866 nla_nest_cancel(skb, rxsc_list);
2867 goto nla_put_failure;
2868 }
2869
2870 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2871 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2872 struct nlattr *rxsa_nest;
2873
2874 if (!rx_sa)
2875 continue;
2876
ae0be8de 2877 rxsa_nest = nla_nest_start_noflag(skb, k++);
c09440f7
SD		 2878 if (!rxsa_nest) {
2879 nla_nest_cancel(skb, rxsa_list);
2880 nla_nest_cancel(skb, rxsc_nest);
2881 nla_nest_cancel(skb, rxsc_list);
2882 goto nla_put_failure;
2883 }
2884
ae0be8de
MK		 2885 attr = nla_nest_start_noflag(skb,
2886 MACSEC_SA_ATTR_STATS);
c09440f7
SD		 2887 if (!attr) {
2888 nla_nest_cancel(skb, rxsa_list);
2889 nla_nest_cancel(skb, rxsc_nest);
2890 nla_nest_cancel(skb, rxsc_list);
2891 goto nla_put_failure;
2892 }
2893 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2894 nla_nest_cancel(skb, attr);
2895 nla_nest_cancel(skb, rxsa_list);
2896 nla_nest_cancel(skb, rxsc_nest);
2897 nla_nest_cancel(skb, rxsc_list);
2898 goto nla_put_failure;
2899 }
2900 nla_nest_end(skb, attr);
2901
2902 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2903 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
8acca6ac 2904 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
c09440f7
SD		 2905 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2906 nla_nest_cancel(skb, rxsa_nest);
2907 nla_nest_cancel(skb, rxsc_nest);
2908 nla_nest_cancel(skb, rxsc_list);
2909 goto nla_put_failure;
2910 }
2911 nla_nest_end(skb, rxsa_nest);
2912 }
2913
2914 nla_nest_end(skb, rxsa_list);
2915 nla_nest_end(skb, rxsc_nest);
2916 }
2917
2918 nla_nest_end(skb, rxsc_list);
2919
c09440f7
SD		 2920 genlmsg_end(skb, hdr);
2921
2922 return 0;
2923
2924nla_put_failure:
c09440f7
SD		 2925 genlmsg_cancel(skb, hdr);
2926 return -EMSGSIZE;
2927}
2928
96cfc505
SD		 2929static int macsec_generation = 1; /* protected by RTNL */
2930
c09440f7
SD		 2931static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2932{
2933 struct net *net = sock_net(skb->sk);
2934 struct net_device *dev;
2935 int dev_idx, d;
2936
2937 dev_idx = cb->args[0];
2938
2939 d = 0;
c10c63ea 2940 rtnl_lock();
96cfc505
SD		 2941
2942 cb->seq = macsec_generation;
2943
c09440f7
SD		 2944 for_each_netdev(net, dev) {
2945 struct macsec_secy *secy;
2946
2947 if (d < dev_idx)
2948 goto next;
2949
2950 if (!netif_is_macsec(dev))
2951 goto next;
2952
2953 secy = &macsec_priv(dev)->secy;
2954 if (dump_secy(secy, dev, skb, cb) < 0)
2955 goto done;
2956next:
2957 d++;
2958 }
2959
2960done:
c10c63ea 2961 rtnl_unlock();
c09440f7
SD		 2962 cb->args[0] = d;
2963 return skb->len;
2964}
2965
2966static const struct genl_ops macsec_genl_ops[] = {
2967 {
2968 .cmd = MACSEC_CMD_GET_TXSC,
ef6243ac 2969 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 2970 .dumpit = macsec_dump_txsc,
c09440f7
SD		 2971 },
2972 {
2973 .cmd = MACSEC_CMD_ADD_RXSC,
ef6243ac 2974 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 2975 .doit = macsec_add_rxsc,
c09440f7
SD		 2976 .flags = GENL_ADMIN_PERM,
2977 },
2978 {
2979 .cmd = MACSEC_CMD_DEL_RXSC,
ef6243ac 2980 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 2981 .doit = macsec_del_rxsc,
c09440f7
SD		 2982 .flags = GENL_ADMIN_PERM,
2983 },
2984 {
2985 .cmd = MACSEC_CMD_UPD_RXSC,
ef6243ac 2986 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 2987 .doit = macsec_upd_rxsc,
c09440f7
SD		 2988 .flags = GENL_ADMIN_PERM,
2989 },
2990 {
2991 .cmd = MACSEC_CMD_ADD_TXSA,
ef6243ac 2992 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 2993 .doit = macsec_add_txsa,
c09440f7
SD		 2994 .flags = GENL_ADMIN_PERM,
2995 },
2996 {
2997 .cmd = MACSEC_CMD_DEL_TXSA,
ef6243ac 2998 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 2999 .doit = macsec_del_txsa,
c09440f7
SD		 3000 .flags = GENL_ADMIN_PERM,
3001 },
3002 {
3003 .cmd = MACSEC_CMD_UPD_TXSA,
ef6243ac 3004 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3005 .doit = macsec_upd_txsa,
c09440f7
SD		 3006 .flags = GENL_ADMIN_PERM,
3007 },
3008 {
3009 .cmd = MACSEC_CMD_ADD_RXSA,
ef6243ac 3010 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3011 .doit = macsec_add_rxsa,
c09440f7
SD		 3012 .flags = GENL_ADMIN_PERM,
3013 },
3014 {
3015 .cmd = MACSEC_CMD_DEL_RXSA,
ef6243ac 3016 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3017 .doit = macsec_del_rxsa,
c09440f7
SD		 3018 .flags = GENL_ADMIN_PERM,
3019 },
3020 {
3021 .cmd = MACSEC_CMD_UPD_RXSA,
ef6243ac 3022 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3023 .doit = macsec_upd_rxsa,
c09440f7
SD		 3024 .flags = GENL_ADMIN_PERM,
3025 },
dcb780fb
AT		 3026 {
3027 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3028 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3029 .doit = macsec_upd_offload,
3030 .flags = GENL_ADMIN_PERM,
3031 },
c09440f7
SD		 3032};
3033
56989f6d 3034static struct genl_family macsec_fam __ro_after_init = {
489111e5
JB		 3035 .name = MACSEC_GENL_NAME,
3036 .hdrsize = 0,
3037 .version = MACSEC_GENL_VERSION,
3038 .maxattr = MACSEC_ATTR_MAX,
3b0f31f2 3039 .policy = macsec_genl_policy,
489111e5
JB		 3040 .netnsok = true,
3041 .module = THIS_MODULE,
3042 .ops = macsec_genl_ops,
3043 .n_ops = ARRAY_SIZE(macsec_genl_ops),
3044};
3045
c09440f7
SD		 3046static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3047 struct net_device *dev)
3048{
3049 struct macsec_dev *macsec = netdev_priv(dev);
3050 struct macsec_secy *secy = &macsec->secy;
3051 struct pcpu_secy_stats *secy_stats;
3052 int ret, len;
3053
3cf3227a
AT		 3054 if (macsec_is_offloaded(netdev_priv(dev))) {
3055 skb->dev = macsec->real_dev;
3056 return dev_queue_xmit(skb);
3057 }
3058
c09440f7
SD		 3059 /* 10.5 */
3060 if (!secy->protect_frames) {
3061 secy_stats = this_cpu_ptr(macsec->stats);
3062 u64_stats_update_begin(&secy_stats->syncp);
3063 secy_stats->stats.OutPktsUntagged++;
3064 u64_stats_update_end(&secy_stats->syncp);
79c62220 3065 skb->dev = macsec->real_dev;
c09440f7
SD		 3066 len = skb->len;
3067 ret = dev_queue_xmit(skb);
3068 count_tx(dev, ret, len);
3069 return ret;
3070 }
3071
3072 if (!secy->operational) {
3073 kfree_skb(skb);
3074 dev->stats.tx_dropped++;
3075 return NETDEV_TX_OK;
3076 }
3077
3078 skb = macsec_encrypt(skb, dev);
3079 if (IS_ERR(skb)) {
3080 if (PTR_ERR(skb) != -EINPROGRESS)
3081 dev->stats.tx_dropped++;
3082 return NETDEV_TX_OK;
3083 }
3084
3085 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3086
3087 macsec_encrypt_finish(skb, dev);
3088 len = skb->len;
3089 ret = dev_queue_xmit(skb);
3090 count_tx(dev, ret, len);
3091 return ret;
3092}
3093
3094#define MACSEC_FEATURES \
3095 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
e2003872 3096
c09440f7
SD		 3097static int macsec_dev_init(struct net_device *dev)
3098{
3099 struct macsec_dev *macsec = macsec_priv(dev);
3100 struct net_device *real_dev = macsec->real_dev;
5491e7c6 3101 int err;
c09440f7
SD		 3102
3103 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3104 if (!dev->tstats)
3105 return -ENOMEM;
3106
5491e7c6
PA		 3107 err = gro_cells_init(&macsec->gro_cells, dev);
3108 if (err) {
3109 free_percpu(dev->tstats);
3110 return err;
3111 }
3112
c09440f7
SD		 3113 dev->features = real_dev->features & MACSEC_FEATURES;
3114 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3115
3116 dev->needed_headroom = real_dev->needed_headroom +
3117 MACSEC_NEEDED_HEADROOM;
3118 dev->needed_tailroom = real_dev->needed_tailroom +
3119 MACSEC_NEEDED_TAILROOM;
3120
3121 if (is_zero_ether_addr(dev->dev_addr))
3122 eth_hw_addr_inherit(dev, real_dev);
3123 if (is_zero_ether_addr(dev->broadcast))
3124 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3125
3126 return 0;
3127}
3128
3129static void macsec_dev_uninit(struct net_device *dev)
3130{
5491e7c6
PA		 3131 struct macsec_dev *macsec = macsec_priv(dev);
3132
3133 gro_cells_destroy(&macsec->gro_cells);
c09440f7
SD		 3134 free_percpu(dev->tstats);
3135}
3136
3137static netdev_features_t macsec_fix_features(struct net_device *dev,
3138 netdev_features_t features)
3139{
3140 struct macsec_dev *macsec = macsec_priv(dev);
3141 struct net_device *real_dev = macsec->real_dev;
3142
5491e7c6
PA		 3143 features &= (real_dev->features & MACSEC_FEATURES) |
3144 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3145 features |= NETIF_F_LLTX;
c09440f7
SD		 3146
3147 return features;
3148}
3149
3150static int macsec_dev_open(struct net_device *dev)
3151{
3152 struct macsec_dev *macsec = macsec_priv(dev);
3153 struct net_device *real_dev = macsec->real_dev;
3154 int err;
3155
c09440f7
SD		 3156 err = dev_uc_add(real_dev, dev->dev_addr);
3157 if (err < 0)
3158 return err;
3159
3160 if (dev->flags & IFF_ALLMULTI) {
3161 err = dev_set_allmulti(real_dev, 1);
3162 if (err < 0)
3163 goto del_unicast;
3164 }
3165
3166 if (dev->flags & IFF_PROMISC) {
3167 err = dev_set_promiscuity(real_dev, 1);
3168 if (err < 0)
3169 goto clear_allmulti;
3170 }
3171
3cf3227a
AT		 3172 /* If h/w offloading is available, propagate to the device */
3173 if (macsec_is_offloaded(macsec)) {
3174 const struct macsec_ops *ops;
3175 struct macsec_context ctx;
3176
3177 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3178 if (!ops) {
3179 err = -EOPNOTSUPP;
3180 goto clear_allmulti;
3181 }
3182
3183 err = macsec_offload(ops->mdo_dev_open, &ctx);
3184 if (err)
3185 goto clear_allmulti;
3186 }
3187
c09440f7
SD		 3188 if (netif_carrier_ok(real_dev))
3189 netif_carrier_on(dev);
3190
3191 return 0;
3192clear_allmulti:
3193 if (dev->flags & IFF_ALLMULTI)
3194 dev_set_allmulti(real_dev, -1);
3195del_unicast:
3196 dev_uc_del(real_dev, dev->dev_addr);
3197 netif_carrier_off(dev);
3198 return err;
3199}
3200
3201static int macsec_dev_stop(struct net_device *dev)
3202{
3203 struct macsec_dev *macsec = macsec_priv(dev);
3204 struct net_device *real_dev = macsec->real_dev;
3205
3206 netif_carrier_off(dev);
3207
3cf3227a
AT		 3208 /* If h/w offloading is available, propagate to the device */
3209 if (macsec_is_offloaded(macsec)) {
3210 const struct macsec_ops *ops;
3211 struct macsec_context ctx;
3212
3213 ops = macsec_get_ops(macsec, &ctx);
3214 if (ops)
3215 macsec_offload(ops->mdo_dev_stop, &ctx);
3216 }
3217
c09440f7
SD		 3218 dev_mc_unsync(real_dev, dev);
3219 dev_uc_unsync(real_dev, dev);
3220
3221 if (dev->flags & IFF_ALLMULTI)
3222 dev_set_allmulti(real_dev, -1);
3223
3224 if (dev->flags & IFF_PROMISC)
3225 dev_set_promiscuity(real_dev, -1);
3226
3227 dev_uc_del(real_dev, dev->dev_addr);
3228
3229 return 0;
3230}
3231
3232static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3233{
3234 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3235
3236 if (!(dev->flags & IFF_UP))
3237 return;
3238
3239 if (change & IFF_ALLMULTI)
3240 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3241
3242 if (change & IFF_PROMISC)
3243 dev_set_promiscuity(real_dev,
3244 dev->flags & IFF_PROMISC ? 1 : -1);
3245}
3246
3247static void macsec_dev_set_rx_mode(struct net_device *dev)
3248{
3249 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3250
3251 dev_mc_sync(real_dev, dev);
3252 dev_uc_sync(real_dev, dev);
3253}
3254
3255static int macsec_set_mac_address(struct net_device *dev, void *p)
3256{
3257 struct macsec_dev *macsec = macsec_priv(dev);
3258 struct net_device *real_dev = macsec->real_dev;
3259 struct sockaddr *addr = p;
3260 int err;
3261
3262 if (!is_valid_ether_addr(addr->sa_data))
3263 return -EADDRNOTAVAIL;
3264
3265 if (!(dev->flags & IFF_UP))
3266 goto out;
3267
3268 err = dev_uc_add(real_dev, addr->sa_data);
3269 if (err < 0)
3270 return err;
3271
3272 dev_uc_del(real_dev, dev->dev_addr);
3273
3274out:
3275 ether_addr_copy(dev->dev_addr, addr->sa_data);
6fc498bc 3276 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
09f4136c
DB		 3277
3278 /* If h/w offloading is available, propagate to the device */
3279 if (macsec_is_offloaded(macsec)) {
3280 const struct macsec_ops *ops;
3281 struct macsec_context ctx;
3282
3283 ops = macsec_get_ops(macsec, &ctx);
3284 if (ops) {
3285 ctx.secy = &macsec->secy;
3286 macsec_offload(ops->mdo_upd_secy, &ctx);
3287 }
3288 }
3289
c09440f7
SD		 3290 return 0;
3291}
3292
3293static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3294{
3295 struct macsec_dev *macsec = macsec_priv(dev);
3296 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3297
3298 if (macsec->real_dev->mtu - extra < new_mtu)
3299 return -ERANGE;
3300
3301 dev->mtu = new_mtu;
3302
3303 return 0;
3304}
3305
bc1f4470 3306static void macsec_get_stats64(struct net_device *dev,
3307 struct rtnl_link_stats64 *s)
c09440f7
SD		 3308{
3309 int cpu;
3310
3311 if (!dev->tstats)
bc1f4470 3312 return;
c09440f7
SD		 3313
3314 for_each_possible_cpu(cpu) {
3315 struct pcpu_sw_netstats *stats;
3316 struct pcpu_sw_netstats tmp;
3317 int start;
3318
3319 stats = per_cpu_ptr(dev->tstats, cpu);
3320 do {
3321 start = u64_stats_fetch_begin_irq(&stats->syncp);
3322 tmp.rx_packets = stats->rx_packets;
3323 tmp.rx_bytes = stats->rx_bytes;
3324 tmp.tx_packets = stats->tx_packets;
3325 tmp.tx_bytes = stats->tx_bytes;
3326 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
3327
3328 s->rx_packets += tmp.rx_packets;
3329 s->rx_bytes += tmp.rx_bytes;
3330 s->tx_packets += tmp.tx_packets;
3331 s->tx_bytes += tmp.tx_bytes;
3332 }
3333
3334 s->rx_dropped = dev->stats.rx_dropped;
3335 s->tx_dropped = dev->stats.tx_dropped;
c09440f7
SD		 3336}
3337
3338static int macsec_get_iflink(const struct net_device *dev)
3339{
3340 return macsec_priv(dev)->real_dev->ifindex;
3341}
3342
3343static const struct net_device_ops macsec_netdev_ops = {
3344 .ndo_init = macsec_dev_init,
3345 .ndo_uninit = macsec_dev_uninit,
3346 .ndo_open = macsec_dev_open,
3347 .ndo_stop = macsec_dev_stop,
3348 .ndo_fix_features = macsec_fix_features,
3349 .ndo_change_mtu = macsec_change_mtu,
3350 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3351 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3352 .ndo_set_mac_address = macsec_set_mac_address,
3353 .ndo_start_xmit = macsec_start_xmit,
3354 .ndo_get_stats64 = macsec_get_stats64,
3355 .ndo_get_iflink = macsec_get_iflink,
3356};
3357
3358static const struct device_type macsec_type = {
3359 .name = "macsec",
3360};
3361
3362static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3363 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
31d9a1c5 3364 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
c09440f7
SD		 3365 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3366 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3367 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3368 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3369 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3370 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3371 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3372 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3373 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3374 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3375 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3376};
3377
3378static void macsec_free_netdev(struct net_device *dev)
3379{
3380 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 3381
3382 free_percpu(macsec->stats);
3383 free_percpu(macsec->secy.tx_sc.stats);
3384
c09440f7
SD		 3385}
3386
3387static void macsec_setup(struct net_device *dev)
3388{
3389 ether_setup(dev);
91572088
JW		 3390 dev->min_mtu = 0;
3391 dev->max_mtu = ETH_MAX_MTU;
e425974f 3392 dev->priv_flags |= IFF_NO_QUEUE;
c09440f7 3393 dev->netdev_ops = &macsec_netdev_ops;
cf124db5
DM		 3394 dev->needs_free_netdev = true;
3395 dev->priv_destructor = macsec_free_netdev;
c24acf03 3396 SET_NETDEV_DEVTYPE(dev, &macsec_type);
c09440f7
SD		 3397
3398 eth_zero_addr(dev->broadcast);
3399}
3400
ccfdec90
FW		 3401static int macsec_changelink_common(struct net_device *dev,
3402 struct nlattr *data[])
c09440f7
SD		 3403{
3404 struct macsec_secy *secy;
3405 struct macsec_tx_sc *tx_sc;
3406
3407 secy = &macsec_priv(dev)->secy;
3408 tx_sc = &secy->tx_sc;
3409
3410 if (data[IFLA_MACSEC_ENCODING_SA]) {
3411 struct macsec_tx_sa *tx_sa;
3412
3413 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3414 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3415
3416 secy->operational = tx_sa && tx_sa->active;
3417 }
3418
3419 if (data[IFLA_MACSEC_WINDOW])
3420 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3421
3422 if (data[IFLA_MACSEC_ENCRYPT])
3423 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3424
3425 if (data[IFLA_MACSEC_PROTECT])
3426 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3427
3428 if (data[IFLA_MACSEC_INC_SCI])
3429 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3430
3431 if (data[IFLA_MACSEC_ES])
3432 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3433
3434 if (data[IFLA_MACSEC_SCB])
3435 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3436
3437 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3438 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3439
3440 if (data[IFLA_MACSEC_VALIDATION])
3441 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
ccfdec90
FW		 3442
3443 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3444 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3445 case MACSEC_CIPHER_ID_GCM_AES_128:
e8660ded 3446 case MACSEC_DEFAULT_CIPHER_ID:
ccfdec90
FW		 3447 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3448 break;
3449 case MACSEC_CIPHER_ID_GCM_AES_256:
3450 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3451 break;
3452 default:
3453 return -EINVAL;
3454 }
3455 }
3456
3457 return 0;
c09440f7
SD		 3458}
3459
3460static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
ad744b22
MS		 3461 struct nlattr *data[],
3462 struct netlink_ext_ack *extack)
c09440f7 3463{
3cf3227a
AT		 3464 struct macsec_dev *macsec = macsec_priv(dev);
3465 struct macsec_tx_sa tx_sc;
3466 struct macsec_secy secy;
3467 int ret;
3468
c09440f7
SD		 3469 if (!data)
3470 return 0;
3471
3472 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3473 data[IFLA_MACSEC_ICV_LEN] ||
3474 data[IFLA_MACSEC_SCI] ||
3475 data[IFLA_MACSEC_PORT])
3476 return -EINVAL;
3477
3cf3227a
AT		 3478 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3479 * propagation fails, to revert macsec_changelink_common.
3480 */
3481 memcpy(&secy, &macsec->secy, sizeof(secy));
3482 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3483
3484 ret = macsec_changelink_common(dev, data);
3485 if (ret)
3486 return ret;
3487
3488 /* If h/w offloading is available, propagate to the device */
3489 if (macsec_is_offloaded(macsec)) {
3490 const struct macsec_ops *ops;
3491 struct macsec_context ctx;
3492 int ret;
3493
3494 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3495 if (!ops) {
3496 ret = -EOPNOTSUPP;
3497 goto cleanup;
3498 }
3499
3500 ctx.secy = &macsec->secy;
3501 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3502 if (ret)
3503 goto cleanup;
3504 }
3505
3506 return 0;
3507
3508cleanup:
3509 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3510 memcpy(&macsec->secy, &secy, sizeof(secy));
3511
3512 return ret;
c09440f7
SD		 3513}
3514
3515static void macsec_del_dev(struct macsec_dev *macsec)
3516{
3517 int i;
3518
3519 while (macsec->secy.rx_sc) {
3520 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3521
3522 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3523 free_rx_sc(rx_sc);
3524 }
3525
3526 for (i = 0; i < MACSEC_NUM_AN; i++) {
3527 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3528
3529 if (sa) {
3530 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3531 clear_tx_sa(sa);
3532 }
3533 }
3534}
3535
bbe11fab
SD		 3536static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3537{
3538 struct macsec_dev *macsec = macsec_priv(dev);
e2003872 3539 struct net_device *real_dev = macsec->real_dev;
bbe11fab
SD		 3540
3541 unregister_netdevice_queue(dev, head);
3542 list_del_rcu(&macsec->secys);
3543 macsec_del_dev(macsec);
e2003872 3544 netdev_upper_dev_unlink(real_dev, dev);
bbe11fab
SD		 3545
3546 macsec_generation++;
3547}
3548
c09440f7
SD		 3549static void macsec_dellink(struct net_device *dev, struct list_head *head)
3550{
3551 struct macsec_dev *macsec = macsec_priv(dev);
3552 struct net_device *real_dev = macsec->real_dev;
3553 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3554
3cf3227a
AT		 3555 /* If h/w offloading is available, propagate to the device */
3556 if (macsec_is_offloaded(macsec)) {
3557 const struct macsec_ops *ops;
3558 struct macsec_context ctx;
3559
3560 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3561 if (ops) {
3562 ctx.secy = &macsec->secy;
3563 macsec_offload(ops->mdo_del_secy, &ctx);
3564 }
3565 }
3566
bbe11fab 3567 macsec_common_dellink(dev, head);
96cfc505 3568
960d5848 3569 if (list_empty(&rxd->secys)) {
c09440f7 3570 netdev_rx_handler_unregister(real_dev);
960d5848
SD		 3571 kfree(rxd);
3572 }
c09440f7
SD		 3573}
3574
3575static int register_macsec_dev(struct net_device *real_dev,
3576 struct net_device *dev)
3577{
3578 struct macsec_dev *macsec = macsec_priv(dev);
3579 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3580
3581 if (!rxd) {
3582 int err;
3583
3584 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3585 if (!rxd)
3586 return -ENOMEM;
3587
3588 INIT_LIST_HEAD(&rxd->secys);
3589
3590 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3591 rxd);
960d5848
SD		 3592 if (err < 0) {
3593 kfree(rxd);
c09440f7 3594 return err;
960d5848 3595 }
c09440f7
SD		 3596 }
3597
3598 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3599 return 0;
3600}
3601
3602static bool sci_exists(struct net_device *dev, sci_t sci)
3603{
3604 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3605 struct macsec_dev *macsec;
3606
3607 list_for_each_entry(macsec, &rxd->secys, secys) {
3608 if (macsec->secy.sci == sci)
3609 return true;
3610 }
3611
3612 return false;
3613}
3614
c09440f7
SD		 3615static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3616{
3617 struct macsec_dev *macsec = macsec_priv(dev);
3618 struct macsec_secy *secy = &macsec->secy;
3619
3620 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3621 if (!macsec->stats)
3622 return -ENOMEM;
3623
3624 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3625 if (!secy->tx_sc.stats) {
3626 free_percpu(macsec->stats);
3627 return -ENOMEM;
3628 }
3629
3630 if (sci == MACSEC_UNDEF_SCI)
3631 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3632
3633 secy->netdev = dev;
3634 secy->operational = true;
3635 secy->key_len = DEFAULT_SAK_LEN;
3636 secy->icv_len = icv_len;
3637 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3638 secy->protect_frames = true;
3639 secy->replay_protect = false;
3640
3641 secy->sci = sci;
3642 secy->tx_sc.active = true;
3643 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3644 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3645 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3646 secy->tx_sc.end_station = false;
3647 secy->tx_sc.scb = false;
3648
3649 return 0;
3650}
3651
3652static int macsec_newlink(struct net *net, struct net_device *dev,
7a3f4a18
MS		 3653 struct nlattr *tb[], struct nlattr *data[],
3654 struct netlink_ext_ack *extack)
c09440f7
SD		 3655{
3656 struct macsec_dev *macsec = macsec_priv(dev);
3657 struct net_device *real_dev;
3658 int err;
3659 sci_t sci;
3660 u8 icv_len = DEFAULT_ICV_LEN;
3661 rx_handler_func_t *rx_handler;
3662
3663 if (!tb[IFLA_LINK])
3664 return -EINVAL;
3665 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3666 if (!real_dev)
3667 return -ENODEV;
3668
3669 dev->priv_flags |= IFF_MACSEC;
3670
3671 macsec->real_dev = real_dev;
3672
3cf3227a
AT		 3673 /* MACsec offloading is off by default */
3674 macsec->offload = MACSEC_OFFLOAD_OFF;
3675
c09440f7
SD		 3676 if (data && data[IFLA_MACSEC_ICV_LEN])
3677 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3678 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3679
3680 rx_handler = rtnl_dereference(real_dev->rx_handler);
3681 if (rx_handler && rx_handler != macsec_handle_frame)
3682 return -EBUSY;
3683
3684 err = register_netdevice(dev);
3685 if (err < 0)
3686 return err;
3687
42ab19ee 3688 err = netdev_upper_dev_link(real_dev, dev, extack);
e2003872 3689 if (err < 0)
bd28899d 3690 goto unregister;
e2003872 3691
c09440f7
SD		 3692 /* need to be already registered so that ->init has run and
3693 * the MAC addr is set
3694 */
3695 if (data && data[IFLA_MACSEC_SCI])
3696 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3697 else if (data && data[IFLA_MACSEC_PORT])
3698 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3699 else
3700 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3701
3702 if (rx_handler && sci_exists(real_dev, sci)) {
3703 err = -EBUSY;
e2003872 3704 goto unlink;
c09440f7
SD		 3705 }
3706
3707 err = macsec_add_dev(dev, sci, icv_len);
3708 if (err)
e2003872 3709 goto unlink;
c09440f7 3710
ccfdec90
FW		 3711 if (data) {
3712 err = macsec_changelink_common(dev, data);
3713 if (err)
3714 goto del_dev;
3715 }
c09440f7
SD		 3716
3717 err = register_macsec_dev(real_dev, dev);
3718 if (err < 0)
3719 goto del_dev;
3720
e6ac0758
SD		 3721 netif_stacked_transfer_operstate(real_dev, dev);
3722 linkwatch_fire_event(dev);
3723
96cfc505
SD		 3724 macsec_generation++;
3725
c09440f7
SD		 3726 return 0;
3727
3728del_dev:
3729 macsec_del_dev(macsec);
e2003872
SD		 3730unlink:
3731 netdev_upper_dev_unlink(real_dev, dev);
bd28899d 3732unregister:
c09440f7
SD		 3733 unregister_netdevice(dev);
3734 return err;
3735}
3736
a8b8a889
MS		 3737static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
3738 struct netlink_ext_ack *extack)
c09440f7 3739{
74816480 3740 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
c09440f7
SD		 3741 u8 icv_len = DEFAULT_ICV_LEN;
3742 int flag;
3743 bool es, scb, sci;
3744
3745 if (!data)
3746 return 0;
3747
3748 if (data[IFLA_MACSEC_CIPHER_SUITE])
3749 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3750
f04c392d 3751 if (data[IFLA_MACSEC_ICV_LEN]) {
c09440f7 3752 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
f04c392d
DC		 3753 if (icv_len != DEFAULT_ICV_LEN) {
3754 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3755 struct crypto_aead *dummy_tfm;
3756
3757 dummy_tfm = macsec_alloc_tfm(dummy_key,
3758 DEFAULT_SAK_LEN,
3759 icv_len);
3760 if (IS_ERR(dummy_tfm))
3761 return PTR_ERR(dummy_tfm);
3762 crypto_free_aead(dummy_tfm);
3763 }
3764 }
c09440f7
SD		 3765
3766 switch (csid) {
ccfdec90
FW		 3767 case MACSEC_CIPHER_ID_GCM_AES_128:
3768 case MACSEC_CIPHER_ID_GCM_AES_256:
e8660ded 3769 case MACSEC_DEFAULT_CIPHER_ID:
c09440f7 3770 if (icv_len < MACSEC_MIN_ICV_LEN ||
2ccbe2cb 3771 icv_len > MACSEC_STD_ICV_LEN)
c09440f7
SD		 3772 return -EINVAL;
3773 break;
3774 default:
3775 return -EINVAL;
3776 }
3777
3778 if (data[IFLA_MACSEC_ENCODING_SA]) {
3779 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3780 return -EINVAL;
3781 }
3782
3783 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3784 flag < IFLA_MACSEC_VALIDATION;
3785 flag++) {
3786 if (data[flag]) {
3787 if (nla_get_u8(data[flag]) > 1)
3788 return -EINVAL;
3789 }
3790 }
3791
3792 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3793 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3794 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3795
3796 if ((sci && (scb || es)) || (scb && es))
3797 return -EINVAL;
3798
3799 if (data[IFLA_MACSEC_VALIDATION] &&
3800 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3801 return -EINVAL;
3802
4b1fb935
SD		 3803 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3804 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
c09440f7
SD		 3805 !data[IFLA_MACSEC_WINDOW])
3806 return -EINVAL;
3807
3808 return 0;
3809}
3810
3811static struct net *macsec_get_link_net(const struct net_device *dev)
3812{
3813 return dev_net(macsec_priv(dev)->real_dev);
3814}
3815
3816static size_t macsec_get_size(const struct net_device *dev)
3817{
c9fba3ed
ZS		 3818 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3819 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3820 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3821 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3822 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3823 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3824 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3825 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3826 nla_total_size(1) + /* IFLA_MACSEC_ES */
3827 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3828 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3829 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
c09440f7
SD		 3830 0;
3831}
3832
3833static int macsec_fill_info(struct sk_buff *skb,
3834 const struct net_device *dev)
3835{
3836 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3837 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ccfdec90
FW		 3838 u64 csid;
3839
3840 switch (secy->key_len) {
3841 case MACSEC_GCM_AES_128_SAK_LEN:
e8660ded 3842 csid = MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 3843 break;
3844 case MACSEC_GCM_AES_256_SAK_LEN:
3845 csid = MACSEC_CIPHER_ID_GCM_AES_256;
3846 break;
3847 default:
3848 goto nla_put_failure;
3849 }
c09440f7 3850
f60d94c0
ND		 3851 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3852 IFLA_MACSEC_PAD) ||
c09440f7 3853 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
f60d94c0 3854 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
ccfdec90 3855 csid, IFLA_MACSEC_PAD) ||
c09440f7
SD		 3856 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3857 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3858 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3859 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3860 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3861 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3862 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3863 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3864 0)
3865 goto nla_put_failure;
3866
3867 if (secy->replay_protect) {
3868 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3869 goto nla_put_failure;
3870 }
3871
3872 return 0;
3873
3874nla_put_failure:
3875 return -EMSGSIZE;
3876}
3877
3878static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3879 .kind = "macsec",
3880 .priv_size = sizeof(struct macsec_dev),
3881 .maxtype = IFLA_MACSEC_MAX,
3882 .policy = macsec_rtnl_policy,
3883 .setup = macsec_setup,
3884 .validate = macsec_validate_attr,
3885 .newlink = macsec_newlink,
3886 .changelink = macsec_changelink,
3887 .dellink = macsec_dellink,
3888 .get_size = macsec_get_size,
3889 .fill_info = macsec_fill_info,
3890 .get_link_net = macsec_get_link_net,
3891};
3892
3893static bool is_macsec_master(struct net_device *dev)
3894{
3895 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3896}
3897
3898static int macsec_notify(struct notifier_block *this, unsigned long event,
3899 void *ptr)
3900{
3901 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3902 LIST_HEAD(head);
3903
3904 if (!is_macsec_master(real_dev))
3905 return NOTIFY_DONE;
3906
3907 switch (event) {
e6ac0758
SD		 3908 case NETDEV_DOWN:
3909 case NETDEV_UP:
3910 case NETDEV_CHANGE: {
3911 struct macsec_dev *m, *n;
3912 struct macsec_rxh_data *rxd;
3913
3914 rxd = macsec_data_rtnl(real_dev);
3915 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3916 struct net_device *dev = m->secy.netdev;
3917
3918 netif_stacked_transfer_operstate(real_dev, dev);
3919 }
3920 break;
3921 }
c09440f7
SD		 3922 case NETDEV_UNREGISTER: {
3923 struct macsec_dev *m, *n;
3924 struct macsec_rxh_data *rxd;
3925
3926 rxd = macsec_data_rtnl(real_dev);
3927 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
bbe11fab 3928 macsec_common_dellink(m->secy.netdev, &head);
c09440f7 3929 }
bbe11fab
SD		 3930
3931 netdev_rx_handler_unregister(real_dev);
3932 kfree(rxd);
3933
c09440f7
SD		 3934 unregister_netdevice_many(&head);
3935 break;
3936 }
3937 case NETDEV_CHANGEMTU: {
3938 struct macsec_dev *m;
3939 struct macsec_rxh_data *rxd;
3940
3941 rxd = macsec_data_rtnl(real_dev);
3942 list_for_each_entry(m, &rxd->secys, secys) {
3943 struct net_device *dev = m->secy.netdev;
3944 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3945 macsec_extra_len(true));
3946
3947 if (dev->mtu > mtu)
3948 dev_set_mtu(dev, mtu);
3949 }
3950 }
3951 }
3952
3953 return NOTIFY_OK;
3954}
3955
3956static struct notifier_block macsec_notifier = {
3957 .notifier_call = macsec_notify,
3958};
3959
3960static int __init macsec_init(void)
3961{
3962 int err;
3963
3964 pr_info("MACsec IEEE 802.1AE\n");
3965 err = register_netdevice_notifier(&macsec_notifier);
3966 if (err)
3967 return err;
3968
3969 err = rtnl_link_register(&macsec_link_ops);
3970 if (err)
3971 goto notifier;
3972
489111e5 3973 err = genl_register_family(&macsec_fam);
c09440f7
SD		 3974 if (err)
3975 goto rtnl;
3976
3977 return 0;
3978
3979rtnl:
3980 rtnl_link_unregister(&macsec_link_ops);
3981notifier:
3982 unregister_netdevice_notifier(&macsec_notifier);
3983 return err;
3984}
3985
3986static void __exit macsec_exit(void)
3987{
3988 genl_unregister_family(&macsec_fam);
3989 rtnl_link_unregister(&macsec_link_ops);
3990 unregister_netdevice_notifier(&macsec_notifier);
b196c22a 3991 rcu_barrier();
c09440f7
SD		 3992}
3993
3994module_init(macsec_init);
3995module_exit(macsec_exit);
3996
3997MODULE_ALIAS_RTNL_LINK("macsec");
78362998 3998MODULE_ALIAS_GENL_FAMILY("macsec");
c09440f7
SD		 3999
4000MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4001MODULE_LICENSE("GPL v2");
Ubuntu Hirsute Linux kernel mirror