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netlink: pass extended ACK struct to parsing functions
[thirdparty/kernel/stable.git] / drivers / net / macsec.c
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c09440f7
SD		 1/*
2 * drivers/net/macsec.c - MACsec device
3 *
4 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/types.h>
13#include <linux/skbuff.h>
14#include <linux/socket.h>
15#include <linux/module.h>
16#include <crypto/aead.h>
17#include <linux/etherdevice.h>
18#include <linux/rtnetlink.h>
19#include <net/genetlink.h>
20#include <net/sock.h>
5491e7c6 21#include <net/gro_cells.h>
c09440f7
SD		 22
23#include <uapi/linux/if_macsec.h>
24
25typedef u64 __bitwise sci_t;
26
27#define MACSEC_SCI_LEN 8
28
29/* SecTAG length = macsec_eth_header without the optional SCI */
30#define MACSEC_TAG_LEN 6
31
32struct macsec_eth_header {
33 struct ethhdr eth;
34 /* SecTAG */
35 u8 tci_an;
36#if defined(__LITTLE_ENDIAN_BITFIELD)
37 u8 short_length:6,
38 unused:2;
39#elif defined(__BIG_ENDIAN_BITFIELD)
40 u8 unused:2,
41 short_length:6;
42#else
43#error "Please fix <asm/byteorder.h>"
44#endif
45 __be32 packet_number;
46 u8 secure_channel_id[8]; /* optional */
47} __packed;
48
49#define MACSEC_TCI_VERSION 0x80
50#define MACSEC_TCI_ES 0x40 /* end station */
51#define MACSEC_TCI_SC 0x20 /* SCI present */
52#define MACSEC_TCI_SCB 0x10 /* epon */
53#define MACSEC_TCI_E 0x08 /* encryption */
54#define MACSEC_TCI_C 0x04 /* changed text */
55#define MACSEC_AN_MASK 0x03 /* association number */
56#define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
57
58/* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59#define MIN_NON_SHORT_LEN 48
60
61#define GCM_AES_IV_LEN 12
62#define DEFAULT_ICV_LEN 16
63
64#define MACSEC_NUM_AN 4 /* 2 bits for the association number */
65
66#define for_each_rxsc(secy, sc) \
67 for (sc = rcu_dereference_bh(secy->rx_sc); \
68 sc; \
69 sc = rcu_dereference_bh(sc->next))
70#define for_each_rxsc_rtnl(secy, sc) \
71 for (sc = rtnl_dereference(secy->rx_sc); \
72 sc; \
73 sc = rtnl_dereference(sc->next))
74
75struct gcm_iv {
76 union {
77 u8 secure_channel_id[8];
78 sci_t sci;
79 };
80 __be32 pn;
81};
82
83/**
84 * struct macsec_key - SA key
85 * @id: user-provided key identifier
86 * @tfm: crypto struct, key storage
87 */
88struct macsec_key {
8acca6ac 89 u8 id[MACSEC_KEYID_LEN];
c09440f7
SD		 90 struct crypto_aead *tfm;
91};
92
93struct macsec_rx_sc_stats {
94 __u64 InOctetsValidated;
95 __u64 InOctetsDecrypted;
96 __u64 InPktsUnchecked;
97 __u64 InPktsDelayed;
98 __u64 InPktsOK;
99 __u64 InPktsInvalid;
100 __u64 InPktsLate;
101 __u64 InPktsNotValid;
102 __u64 InPktsNotUsingSA;
103 __u64 InPktsUnusedSA;
104};
105
106struct macsec_rx_sa_stats {
107 __u32 InPktsOK;
108 __u32 InPktsInvalid;
109 __u32 InPktsNotValid;
110 __u32 InPktsNotUsingSA;
111 __u32 InPktsUnusedSA;
112};
113
114struct macsec_tx_sa_stats {
115 __u32 OutPktsProtected;
116 __u32 OutPktsEncrypted;
117};
118
119struct macsec_tx_sc_stats {
120 __u64 OutPktsProtected;
121 __u64 OutPktsEncrypted;
122 __u64 OutOctetsProtected;
123 __u64 OutOctetsEncrypted;
124};
125
126struct macsec_dev_stats {
127 __u64 OutPktsUntagged;
128 __u64 InPktsUntagged;
129 __u64 OutPktsTooLong;
130 __u64 InPktsNoTag;
131 __u64 InPktsBadTag;
132 __u64 InPktsUnknownSCI;
133 __u64 InPktsNoSCI;
134 __u64 InPktsOverrun;
135};
136
137/**
138 * struct macsec_rx_sa - receive secure association
139 * @active:
140 * @next_pn: packet number expected for the next packet
141 * @lock: protects next_pn manipulations
142 * @key: key structure
143 * @stats: per-SA stats
144 */
145struct macsec_rx_sa {
146 struct macsec_key key;
147 spinlock_t lock;
148 u32 next_pn;
149 atomic_t refcnt;
150 bool active;
151 struct macsec_rx_sa_stats __percpu *stats;
152 struct macsec_rx_sc *sc;
153 struct rcu_head rcu;
154};
155
156struct pcpu_rx_sc_stats {
157 struct macsec_rx_sc_stats stats;
158 struct u64_stats_sync syncp;
159};
160
161/**
162 * struct macsec_rx_sc - receive secure channel
163 * @sci: secure channel identifier for this SC
164 * @active: channel is active
165 * @sa: array of secure associations
166 * @stats: per-SC stats
167 */
168struct macsec_rx_sc {
169 struct macsec_rx_sc __rcu *next;
170 sci_t sci;
171 bool active;
172 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
173 struct pcpu_rx_sc_stats __percpu *stats;
174 atomic_t refcnt;
175 struct rcu_head rcu_head;
176};
177
178/**
179 * struct macsec_tx_sa - transmit secure association
180 * @active:
181 * @next_pn: packet number to use for the next packet
182 * @lock: protects next_pn manipulations
183 * @key: key structure
184 * @stats: per-SA stats
185 */
186struct macsec_tx_sa {
187 struct macsec_key key;
188 spinlock_t lock;
189 u32 next_pn;
190 atomic_t refcnt;
191 bool active;
192 struct macsec_tx_sa_stats __percpu *stats;
193 struct rcu_head rcu;
194};
195
196struct pcpu_tx_sc_stats {
197 struct macsec_tx_sc_stats stats;
198 struct u64_stats_sync syncp;
199};
200
201/**
202 * struct macsec_tx_sc - transmit secure channel
203 * @active:
204 * @encoding_sa: association number of the SA currently in use
205 * @encrypt: encrypt packets on transmit, or authenticate only
206 * @send_sci: always include the SCI in the SecTAG
207 * @end_station:
208 * @scb: single copy broadcast flag
209 * @sa: array of secure associations
210 * @stats: stats for this TXSC
211 */
212struct macsec_tx_sc {
213 bool active;
214 u8 encoding_sa;
215 bool encrypt;
216 bool send_sci;
217 bool end_station;
218 bool scb;
219 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
220 struct pcpu_tx_sc_stats __percpu *stats;
221};
222
223#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
224
225/**
226 * struct macsec_secy - MACsec Security Entity
227 * @netdev: netdevice for this SecY
228 * @n_rx_sc: number of receive secure channels configured on this SecY
229 * @sci: secure channel identifier used for tx
230 * @key_len: length of keys used by the cipher suite
231 * @icv_len: length of ICV used by the cipher suite
232 * @validate_frames: validation mode
233 * @operational: MAC_Operational flag
234 * @protect_frames: enable protection for this SecY
235 * @replay_protect: enable packet number checks on receive
236 * @replay_window: size of the replay window
237 * @tx_sc: transmit secure channel
238 * @rx_sc: linked list of receive secure channels
239 */
240struct macsec_secy {
241 struct net_device *netdev;
242 unsigned int n_rx_sc;
243 sci_t sci;
244 u16 key_len;
245 u16 icv_len;
246 enum macsec_validation_type validate_frames;
247 bool operational;
248 bool protect_frames;
249 bool replay_protect;
250 u32 replay_window;
251 struct macsec_tx_sc tx_sc;
252 struct macsec_rx_sc __rcu *rx_sc;
253};
254
255struct pcpu_secy_stats {
256 struct macsec_dev_stats stats;
257 struct u64_stats_sync syncp;
258};
259
260/**
261 * struct macsec_dev - private data
262 * @secy: SecY config
263 * @real_dev: pointer to underlying netdevice
264 * @stats: MACsec device stats
265 * @secys: linked list of SecY's on the underlying device
266 */
267struct macsec_dev {
268 struct macsec_secy secy;
269 struct net_device *real_dev;
270 struct pcpu_secy_stats __percpu *stats;
271 struct list_head secys;
5491e7c6 272 struct gro_cells gro_cells;
e2003872 273 unsigned int nest_level;
c09440f7
SD		 274};
275
276/**
277 * struct macsec_rxh_data - rx_handler private argument
278 * @secys: linked list of SecY's on this underlying device
279 */
280struct macsec_rxh_data {
281 struct list_head secys;
282};
283
284static struct macsec_dev *macsec_priv(const struct net_device *dev)
285{
286 return (struct macsec_dev *)netdev_priv(dev);
287}
288
289static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
290{
291 return rcu_dereference_bh(dev->rx_handler_data);
292}
293
294static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
295{
296 return rtnl_dereference(dev->rx_handler_data);
297}
298
299struct macsec_cb {
300 struct aead_request *req;
301 union {
302 struct macsec_tx_sa *tx_sa;
303 struct macsec_rx_sa *rx_sa;
304 };
305 u8 assoc_num;
306 bool valid;
307 bool has_sci;
308};
309
310static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
311{
312 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
313
314 if (!sa || !sa->active)
315 return NULL;
316
317 if (!atomic_inc_not_zero(&sa->refcnt))
318 return NULL;
319
320 return sa;
321}
322
323static void free_rx_sc_rcu(struct rcu_head *head)
324{
325 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
326
327 free_percpu(rx_sc->stats);
328 kfree(rx_sc);
329}
330
331static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
332{
333 return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL;
334}
335
336static void macsec_rxsc_put(struct macsec_rx_sc *sc)
337{
338 if (atomic_dec_and_test(&sc->refcnt))
339 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
340}
341
342static void free_rxsa(struct rcu_head *head)
343{
344 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
345
346 crypto_free_aead(sa->key.tfm);
347 free_percpu(sa->stats);
c09440f7
SD		 348 kfree(sa);
349}
350
351static void macsec_rxsa_put(struct macsec_rx_sa *sa)
352{
353 if (atomic_dec_and_test(&sa->refcnt))
354 call_rcu(&sa->rcu, free_rxsa);
355}
356
357static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
358{
359 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
360
361 if (!sa || !sa->active)
362 return NULL;
363
364 if (!atomic_inc_not_zero(&sa->refcnt))
365 return NULL;
366
367 return sa;
368}
369
370static void free_txsa(struct rcu_head *head)
371{
372 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
373
374 crypto_free_aead(sa->key.tfm);
375 free_percpu(sa->stats);
376 kfree(sa);
377}
378
379static void macsec_txsa_put(struct macsec_tx_sa *sa)
380{
381 if (atomic_dec_and_test(&sa->refcnt))
382 call_rcu(&sa->rcu, free_txsa);
383}
384
385static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
386{
387 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
388 return (struct macsec_cb *)skb->cb;
389}
390
391#define MACSEC_PORT_ES (htons(0x0001))
392#define MACSEC_PORT_SCB (0x0000)
393#define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
394
395#define DEFAULT_SAK_LEN 16
396#define DEFAULT_SEND_SCI true
397#define DEFAULT_ENCRYPT false
398#define DEFAULT_ENCODING_SA 0
399
e0f841f5
TB		 400static bool send_sci(const struct macsec_secy *secy)
401{
402 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
403
404 return tx_sc->send_sci ||
405 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
406}
407
c09440f7
SD		 408static sci_t make_sci(u8 *addr, __be16 port)
409{
410 sci_t sci;
411
412 memcpy(&sci, addr, ETH_ALEN);
413 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
414
415 return sci;
416}
417
418static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
419{
420 sci_t sci;
421
422 if (sci_present)
423 memcpy(&sci, hdr->secure_channel_id,
424 sizeof(hdr->secure_channel_id));
425 else
426 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
427
428 return sci;
429}
430
431static unsigned int macsec_sectag_len(bool sci_present)
432{
433 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
434}
435
436static unsigned int macsec_hdr_len(bool sci_present)
437{
438 return macsec_sectag_len(sci_present) + ETH_HLEN;
439}
440
441static unsigned int macsec_extra_len(bool sci_present)
442{
443 return macsec_sectag_len(sci_present) + sizeof(__be16);
444}
445
446/* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
447static void macsec_fill_sectag(struct macsec_eth_header *h,
e0f841f5
TB		 448 const struct macsec_secy *secy, u32 pn,
449 bool sci_present)
c09440f7
SD		 450{
451 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
452
e0f841f5 453 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
c09440f7
SD		 454 h->eth.h_proto = htons(ETH_P_MACSEC);
455
e0f841f5 456 if (sci_present) {
c09440f7
SD		 457 h->tci_an |= MACSEC_TCI_SC;
458 memcpy(&h->secure_channel_id, &secy->sci,
459 sizeof(h->secure_channel_id));
460 } else {
461 if (tx_sc->end_station)
462 h->tci_an |= MACSEC_TCI_ES;
463 if (tx_sc->scb)
464 h->tci_an |= MACSEC_TCI_SCB;
465 }
466
467 h->packet_number = htonl(pn);
468
469 /* with GCM, C/E clear for !encrypt, both set for encrypt */
470 if (tx_sc->encrypt)
471 h->tci_an |= MACSEC_TCI_CONFID;
472 else if (secy->icv_len != DEFAULT_ICV_LEN)
473 h->tci_an |= MACSEC_TCI_C;
474
475 h->tci_an |= tx_sc->encoding_sa;
476}
477
478static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
479{
480 if (data_len < MIN_NON_SHORT_LEN)
481 h->short_length = data_len;
482}
483
484/* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
485static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
486{
487 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
488 int len = skb->len - 2 * ETH_ALEN;
489 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
490
491 /* a) It comprises at least 17 octets */
492 if (skb->len <= 16)
493 return false;
494
495 /* b) MACsec EtherType: already checked */
496
497 /* c) V bit is clear */
498 if (h->tci_an & MACSEC_TCI_VERSION)
499 return false;
500
501 /* d) ES or SCB => !SC */
502 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
503 (h->tci_an & MACSEC_TCI_SC))
504 return false;
505
506 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
507 if (h->unused)
508 return false;
509
510 /* rx.pn != 0 (figure 10-5) */
511 if (!h->packet_number)
512 return false;
513
514 /* length check, f) g) h) i) */
515 if (h->short_length)
516 return len == extra_len + h->short_length;
517 return len >= extra_len + MIN_NON_SHORT_LEN;
518}
519
520#define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
2ccbe2cb 521#define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
c09440f7
SD		 522
523static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
524{
525 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
526
527 gcm_iv->sci = sci;
528 gcm_iv->pn = htonl(pn);
529}
530
531static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
532{
533 return (struct macsec_eth_header *)skb_mac_header(skb);
534}
535
536static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
537{
538 u32 pn;
539
540 spin_lock_bh(&tx_sa->lock);
541 pn = tx_sa->next_pn;
542
543 tx_sa->next_pn++;
544 if (tx_sa->next_pn == 0) {
545 pr_debug("PN wrapped, transitioning to !oper\n");
546 tx_sa->active = false;
547 if (secy->protect_frames)
548 secy->operational = false;
549 }
550 spin_unlock_bh(&tx_sa->lock);
551
552 return pn;
553}
554
555static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
556{
557 struct macsec_dev *macsec = netdev_priv(dev);
558
559 skb->dev = macsec->real_dev;
560 skb_reset_mac_header(skb);
561 skb->protocol = eth_hdr(skb)->h_proto;
562}
563
564static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
565 struct macsec_tx_sa *tx_sa)
566{
567 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
568
569 u64_stats_update_begin(&txsc_stats->syncp);
570 if (tx_sc->encrypt) {
571 txsc_stats->stats.OutOctetsEncrypted += skb->len;
572 txsc_stats->stats.OutPktsEncrypted++;
573 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
574 } else {
575 txsc_stats->stats.OutOctetsProtected += skb->len;
576 txsc_stats->stats.OutPktsProtected++;
577 this_cpu_inc(tx_sa->stats->OutPktsProtected);
578 }
579 u64_stats_update_end(&txsc_stats->syncp);
580}
581
582static void count_tx(struct net_device *dev, int ret, int len)
583{
584 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
585 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
586
587 u64_stats_update_begin(&stats->syncp);
588 stats->tx_packets++;
589 stats->tx_bytes += len;
590 u64_stats_update_end(&stats->syncp);
591 } else {
592 dev->stats.tx_dropped++;
593 }
594}
595
596static void macsec_encrypt_done(struct crypto_async_request *base, int err)
597{
598 struct sk_buff *skb = base->data;
599 struct net_device *dev = skb->dev;
600 struct macsec_dev *macsec = macsec_priv(dev);
601 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
602 int len, ret;
603
604 aead_request_free(macsec_skb_cb(skb)->req);
605
606 rcu_read_lock_bh();
607 macsec_encrypt_finish(skb, dev);
608 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
609 len = skb->len;
610 ret = dev_queue_xmit(skb);
611 count_tx(dev, ret, len);
612 rcu_read_unlock_bh();
613
614 macsec_txsa_put(sa);
615 dev_put(dev);
616}
617
5d9649b3
SD		 618static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
619 unsigned char **iv,
620 struct scatterlist **sg)
621{
622 size_t size, iv_offset, sg_offset;
623 struct aead_request *req;
624 void *tmp;
625
626 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
627 iv_offset = size;
628 size += GCM_AES_IV_LEN;
629
630 size = ALIGN(size, __alignof__(struct scatterlist));
631 sg_offset = size;
632 size += sizeof(struct scatterlist) * (MAX_SKB_FRAGS + 1);
633
634 tmp = kmalloc(size, GFP_ATOMIC);
635 if (!tmp)
636 return NULL;
637
638 *iv = (unsigned char *)(tmp + iv_offset);
639 *sg = (struct scatterlist *)(tmp + sg_offset);
640 req = tmp;
641
642 aead_request_set_tfm(req, tfm);
643
644 return req;
645}
646
c09440f7
SD		 647static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
648 struct net_device *dev)
649{
650 int ret;
5d9649b3
SD		 651 struct scatterlist *sg;
652 unsigned char *iv;
c09440f7
SD		 653 struct ethhdr *eth;
654 struct macsec_eth_header *hh;
655 size_t unprotected_len;
656 struct aead_request *req;
657 struct macsec_secy *secy;
658 struct macsec_tx_sc *tx_sc;
659 struct macsec_tx_sa *tx_sa;
660 struct macsec_dev *macsec = macsec_priv(dev);
e0f841f5 661 bool sci_present;
c09440f7
SD		 662 u32 pn;
663
664 secy = &macsec->secy;
665 tx_sc = &secy->tx_sc;
666
667 /* 10.5.1 TX SA assignment */
668 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
669 if (!tx_sa) {
670 secy->operational = false;
671 kfree_skb(skb);
672 return ERR_PTR(-EINVAL);
673 }
674
675 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
676 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
677 struct sk_buff *nskb = skb_copy_expand(skb,
678 MACSEC_NEEDED_HEADROOM,
679 MACSEC_NEEDED_TAILROOM,
680 GFP_ATOMIC);
681 if (likely(nskb)) {
682 consume_skb(skb);
683 skb = nskb;
684 } else {
685 macsec_txsa_put(tx_sa);
686 kfree_skb(skb);
687 return ERR_PTR(-ENOMEM);
688 }
689 } else {
690 skb = skb_unshare(skb, GFP_ATOMIC);
691 if (!skb) {
692 macsec_txsa_put(tx_sa);
693 return ERR_PTR(-ENOMEM);
694 }
695 }
696
697 unprotected_len = skb->len;
698 eth = eth_hdr(skb);
e0f841f5
TB		 699 sci_present = send_sci(secy);
700 hh = (struct macsec_eth_header *)skb_push(skb, macsec_extra_len(sci_present));
c09440f7
SD		 701 memmove(hh, eth, 2 * ETH_ALEN);
702
703 pn = tx_sa_update_pn(tx_sa, secy);
704 if (pn == 0) {
705 macsec_txsa_put(tx_sa);
706 kfree_skb(skb);
707 return ERR_PTR(-ENOLINK);
708 }
e0f841f5 709 macsec_fill_sectag(hh, secy, pn, sci_present);
c09440f7
SD		 710 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
711
c09440f7
SD		 712 skb_put(skb, secy->icv_len);
713
714 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
715 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
716
717 u64_stats_update_begin(&secy_stats->syncp);
718 secy_stats->stats.OutPktsTooLong++;
719 u64_stats_update_end(&secy_stats->syncp);
720
721 macsec_txsa_put(tx_sa);
722 kfree_skb(skb);
723 return ERR_PTR(-EINVAL);
724 }
725
5d9649b3 726 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg);
c09440f7
SD		 727 if (!req) {
728 macsec_txsa_put(tx_sa);
729 kfree_skb(skb);
730 return ERR_PTR(-ENOMEM);
731 }
732
5d9649b3
SD		 733 macsec_fill_iv(iv, secy->sci, pn);
734
c09440f7
SD		 735 sg_init_table(sg, MAX_SKB_FRAGS + 1);
736 skb_to_sgvec(skb, sg, 0, skb->len);
737
738 if (tx_sc->encrypt) {
e0f841f5 739 int len = skb->len - macsec_hdr_len(sci_present) -
c09440f7
SD		 740 secy->icv_len;
741 aead_request_set_crypt(req, sg, sg, len, iv);
e0f841f5 742 aead_request_set_ad(req, macsec_hdr_len(sci_present));
c09440f7
SD		 743 } else {
744 aead_request_set_crypt(req, sg, sg, 0, iv);
745 aead_request_set_ad(req, skb->len - secy->icv_len);
746 }
747
748 macsec_skb_cb(skb)->req = req;
749 macsec_skb_cb(skb)->tx_sa = tx_sa;
750 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
751
752 dev_hold(skb->dev);
753 ret = crypto_aead_encrypt(req);
754 if (ret == -EINPROGRESS) {
755 return ERR_PTR(ret);
756 } else if (ret != 0) {
757 dev_put(skb->dev);
758 kfree_skb(skb);
759 aead_request_free(req);
760 macsec_txsa_put(tx_sa);
761 return ERR_PTR(-EINVAL);
762 }
763
764 dev_put(skb->dev);
765 aead_request_free(req);
766 macsec_txsa_put(tx_sa);
767
768 return skb;
769}
770
771static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
772{
773 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
774 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
775 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
776 u32 lowest_pn = 0;
777
778 spin_lock(&rx_sa->lock);
779 if (rx_sa->next_pn >= secy->replay_window)
780 lowest_pn = rx_sa->next_pn - secy->replay_window;
781
782 /* Now perform replay protection check again
783 * (see IEEE 802.1AE-2006 figure 10-5)
784 */
785 if (secy->replay_protect && pn < lowest_pn) {
786 spin_unlock(&rx_sa->lock);
787 u64_stats_update_begin(&rxsc_stats->syncp);
788 rxsc_stats->stats.InPktsLate++;
789 u64_stats_update_end(&rxsc_stats->syncp);
790 return false;
791 }
792
793 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
794 u64_stats_update_begin(&rxsc_stats->syncp);
795 if (hdr->tci_an & MACSEC_TCI_E)
796 rxsc_stats->stats.InOctetsDecrypted += skb->len;
797 else
798 rxsc_stats->stats.InOctetsValidated += skb->len;
799 u64_stats_update_end(&rxsc_stats->syncp);
800 }
801
802 if (!macsec_skb_cb(skb)->valid) {
803 spin_unlock(&rx_sa->lock);
804
805 /* 10.6.5 */
806 if (hdr->tci_an & MACSEC_TCI_C ||
807 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
808 u64_stats_update_begin(&rxsc_stats->syncp);
809 rxsc_stats->stats.InPktsNotValid++;
810 u64_stats_update_end(&rxsc_stats->syncp);
811 return false;
812 }
813
814 u64_stats_update_begin(&rxsc_stats->syncp);
815 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
816 rxsc_stats->stats.InPktsInvalid++;
817 this_cpu_inc(rx_sa->stats->InPktsInvalid);
818 } else if (pn < lowest_pn) {
819 rxsc_stats->stats.InPktsDelayed++;
820 } else {
821 rxsc_stats->stats.InPktsUnchecked++;
822 }
823 u64_stats_update_end(&rxsc_stats->syncp);
824 } else {
825 u64_stats_update_begin(&rxsc_stats->syncp);
826 if (pn < lowest_pn) {
827 rxsc_stats->stats.InPktsDelayed++;
828 } else {
829 rxsc_stats->stats.InPktsOK++;
830 this_cpu_inc(rx_sa->stats->InPktsOK);
831 }
832 u64_stats_update_end(&rxsc_stats->syncp);
833
834 if (pn >= rx_sa->next_pn)
835 rx_sa->next_pn = pn + 1;
836 spin_unlock(&rx_sa->lock);
837 }
838
839 return true;
840}
841
842static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
843{
844 skb->pkt_type = PACKET_HOST;
845 skb->protocol = eth_type_trans(skb, dev);
846
847 skb_reset_network_header(skb);
848 if (!skb_transport_header_was_set(skb))
849 skb_reset_transport_header(skb);
850 skb_reset_mac_len(skb);
851}
852
853static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
854{
855 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
856 skb_pull(skb, hdr_len);
857 pskb_trim_unique(skb, skb->len - icv_len);
858}
859
860static void count_rx(struct net_device *dev, int len)
861{
862 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
863
864 u64_stats_update_begin(&stats->syncp);
865 stats->rx_packets++;
866 stats->rx_bytes += len;
867 u64_stats_update_end(&stats->syncp);
868}
869
870static void macsec_decrypt_done(struct crypto_async_request *base, int err)
871{
872 struct sk_buff *skb = base->data;
873 struct net_device *dev = skb->dev;
874 struct macsec_dev *macsec = macsec_priv(dev);
875 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
c78ebe1d 876 struct macsec_rx_sc *rx_sc = rx_sa->sc;
c09440f7
SD		 877 int len, ret;
878 u32 pn;
879
880 aead_request_free(macsec_skb_cb(skb)->req);
881
b3bdc3ac
LR		 882 if (!err)
883 macsec_skb_cb(skb)->valid = true;
884
c09440f7
SD		 885 rcu_read_lock_bh();
886 pn = ntohl(macsec_ethhdr(skb)->packet_number);
887 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
888 rcu_read_unlock_bh();
889 kfree_skb(skb);
890 goto out;
891 }
892
893 macsec_finalize_skb(skb, macsec->secy.icv_len,
894 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
895 macsec_reset_skb(skb, macsec->secy.netdev);
896
897 len = skb->len;
5491e7c6 898 ret = gro_cells_receive(&macsec->gro_cells, skb);
c09440f7
SD		 899 if (ret == NET_RX_SUCCESS)
900 count_rx(dev, len);
901 else
902 macsec->secy.netdev->stats.rx_dropped++;
903
904 rcu_read_unlock_bh();
905
906out:
907 macsec_rxsa_put(rx_sa);
c78ebe1d 908 macsec_rxsc_put(rx_sc);
c09440f7 909 dev_put(dev);
c09440f7
SD		 910}
911
912static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
913 struct net_device *dev,
914 struct macsec_rx_sa *rx_sa,
915 sci_t sci,
916 struct macsec_secy *secy)
917{
918 int ret;
5d9649b3
SD		 919 struct scatterlist *sg;
920 unsigned char *iv;
c09440f7
SD		 921 struct aead_request *req;
922 struct macsec_eth_header *hdr;
923 u16 icv_len = secy->icv_len;
924
925 macsec_skb_cb(skb)->valid = false;
926 skb = skb_share_check(skb, GFP_ATOMIC);
927 if (!skb)
c3b7d0bd 928 return ERR_PTR(-ENOMEM);
c09440f7 929
5d9649b3 930 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg);
c09440f7
SD		 931 if (!req) {
932 kfree_skb(skb);
c3b7d0bd 933 return ERR_PTR(-ENOMEM);
c09440f7
SD		 934 }
935
936 hdr = (struct macsec_eth_header *)skb->data;
937 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
938
939 sg_init_table(sg, MAX_SKB_FRAGS + 1);
940 skb_to_sgvec(skb, sg, 0, skb->len);
941
942 if (hdr->tci_an & MACSEC_TCI_E) {
943 /* confidentiality: ethernet + macsec header
944 * authenticated, encrypted payload
945 */
946 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
947
948 aead_request_set_crypt(req, sg, sg, len, iv);
949 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
950 skb = skb_unshare(skb, GFP_ATOMIC);
951 if (!skb) {
952 aead_request_free(req);
c3b7d0bd 953 return ERR_PTR(-ENOMEM);
c09440f7
SD		 954 }
955 } else {
956 /* integrity only: all headers + data authenticated */
957 aead_request_set_crypt(req, sg, sg, icv_len, iv);
958 aead_request_set_ad(req, skb->len - icv_len);
959 }
960
961 macsec_skb_cb(skb)->req = req;
c09440f7
SD		 962 skb->dev = dev;
963 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
964
965 dev_hold(dev);
966 ret = crypto_aead_decrypt(req);
967 if (ret == -EINPROGRESS) {
c3b7d0bd 968 return ERR_PTR(ret);
c09440f7
SD		 969 } else if (ret != 0) {
970 /* decryption/authentication failed
971 * 10.6 if validateFrames is disabled, deliver anyway
972 */
973 if (ret != -EBADMSG) {
974 kfree_skb(skb);
c3b7d0bd 975 skb = ERR_PTR(ret);
c09440f7
SD		 976 }
977 } else {
978 macsec_skb_cb(skb)->valid = true;
979 }
980 dev_put(dev);
981
982 aead_request_free(req);
983
984 return skb;
985}
986
987static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
988{
989 struct macsec_rx_sc *rx_sc;
990
991 for_each_rxsc(secy, rx_sc) {
992 if (rx_sc->sci == sci)
993 return rx_sc;
994 }
995
996 return NULL;
997}
998
999static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
1000{
1001 struct macsec_rx_sc *rx_sc;
1002
1003 for_each_rxsc_rtnl(secy, rx_sc) {
1004 if (rx_sc->sci == sci)
1005 return rx_sc;
1006 }
1007
1008 return NULL;
1009}
1010
1011static void handle_not_macsec(struct sk_buff *skb)
1012{
1013 struct macsec_rxh_data *rxd;
1014 struct macsec_dev *macsec;
1015
1016 rcu_read_lock();
1017 rxd = macsec_data_rcu(skb->dev);
1018
1019 /* 10.6 If the management control validateFrames is not
1020 * Strict, frames without a SecTAG are received, counted, and
1021 * delivered to the Controlled Port
1022 */
1023 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1024 struct sk_buff *nskb;
1025 int ret;
1026 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1027
1028 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1029 u64_stats_update_begin(&secy_stats->syncp);
1030 secy_stats->stats.InPktsNoTag++;
1031 u64_stats_update_end(&secy_stats->syncp);
1032 continue;
1033 }
1034
1035 /* deliver on this port */
1036 nskb = skb_clone(skb, GFP_ATOMIC);
1037 if (!nskb)
1038 break;
1039
1040 nskb->dev = macsec->secy.netdev;
1041
1042 ret = netif_rx(nskb);
1043 if (ret == NET_RX_SUCCESS) {
1044 u64_stats_update_begin(&secy_stats->syncp);
1045 secy_stats->stats.InPktsUntagged++;
1046 u64_stats_update_end(&secy_stats->syncp);
1047 } else {
1048 macsec->secy.netdev->stats.rx_dropped++;
1049 }
1050 }
1051
1052 rcu_read_unlock();
1053}
1054
1055static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1056{
1057 struct sk_buff *skb = *pskb;
1058 struct net_device *dev = skb->dev;
1059 struct macsec_eth_header *hdr;
1060 struct macsec_secy *secy = NULL;
1061 struct macsec_rx_sc *rx_sc;
1062 struct macsec_rx_sa *rx_sa;
1063 struct macsec_rxh_data *rxd;
1064 struct macsec_dev *macsec;
1065 sci_t sci;
1066 u32 pn;
1067 bool cbit;
1068 struct pcpu_rx_sc_stats *rxsc_stats;
1069 struct pcpu_secy_stats *secy_stats;
1070 bool pulled_sci;
5491e7c6 1071 int ret;
c09440f7
SD		 1072
1073 if (skb_headroom(skb) < ETH_HLEN)
1074 goto drop_direct;
1075
1076 hdr = macsec_ethhdr(skb);
1077 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1078 handle_not_macsec(skb);
1079
1080 /* and deliver to the uncontrolled port */
1081 return RX_HANDLER_PASS;
1082 }
1083
1084 skb = skb_unshare(skb, GFP_ATOMIC);
1085 if (!skb) {
1086 *pskb = NULL;
1087 return RX_HANDLER_CONSUMED;
1088 }
1089
1090 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1091 if (!pulled_sci) {
1092 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1093 goto drop_direct;
1094 }
1095
1096 hdr = macsec_ethhdr(skb);
1097
1098 /* Frames with a SecTAG that has the TCI E bit set but the C
1099 * bit clear are discarded, as this reserved encoding is used
1100 * to identify frames with a SecTAG that are not to be
1101 * delivered to the Controlled Port.
1102 */
1103 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1104 return RX_HANDLER_PASS;
1105
1106 /* now, pull the extra length */
1107 if (hdr->tci_an & MACSEC_TCI_SC) {
1108 if (!pulled_sci)
1109 goto drop_direct;
1110 }
1111
1112 /* ethernet header is part of crypto processing */
1113 skb_push(skb, ETH_HLEN);
1114
1115 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1116 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1117 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1118
1119 rcu_read_lock();
1120 rxd = macsec_data_rcu(skb->dev);
1121
1122 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1123 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
c78ebe1d 1124 sc = sc ? macsec_rxsc_get(sc) : NULL;
c09440f7
SD		 1125
1126 if (sc) {
1127 secy = &macsec->secy;
1128 rx_sc = sc;
1129 break;
1130 }
1131 }
1132
1133 if (!secy)
1134 goto nosci;
1135
1136 dev = secy->netdev;
1137 macsec = macsec_priv(dev);
1138 secy_stats = this_cpu_ptr(macsec->stats);
1139 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1140
1141 if (!macsec_validate_skb(skb, secy->icv_len)) {
1142 u64_stats_update_begin(&secy_stats->syncp);
1143 secy_stats->stats.InPktsBadTag++;
1144 u64_stats_update_end(&secy_stats->syncp);
1145 goto drop_nosa;
1146 }
1147
1148 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1149 if (!rx_sa) {
1150 /* 10.6.1 if the SA is not in use */
1151
1152 /* If validateFrames is Strict or the C bit in the
1153 * SecTAG is set, discard
1154 */
1155 if (hdr->tci_an & MACSEC_TCI_C ||
1156 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1157 u64_stats_update_begin(&rxsc_stats->syncp);
1158 rxsc_stats->stats.InPktsNotUsingSA++;
1159 u64_stats_update_end(&rxsc_stats->syncp);
1160 goto drop_nosa;
1161 }
1162
1163 /* not Strict, the frame (with the SecTAG and ICV
1164 * removed) is delivered to the Controlled Port.
1165 */
1166 u64_stats_update_begin(&rxsc_stats->syncp);
1167 rxsc_stats->stats.InPktsUnusedSA++;
1168 u64_stats_update_end(&rxsc_stats->syncp);
1169 goto deliver;
1170 }
1171
1172 /* First, PN check to avoid decrypting obviously wrong packets */
1173 pn = ntohl(hdr->packet_number);
1174 if (secy->replay_protect) {
1175 bool late;
1176
1177 spin_lock(&rx_sa->lock);
1178 late = rx_sa->next_pn >= secy->replay_window &&
1179 pn < (rx_sa->next_pn - secy->replay_window);
1180 spin_unlock(&rx_sa->lock);
1181
1182 if (late) {
1183 u64_stats_update_begin(&rxsc_stats->syncp);
1184 rxsc_stats->stats.InPktsLate++;
1185 u64_stats_update_end(&rxsc_stats->syncp);
1186 goto drop;
1187 }
1188 }
1189
e3a3b626
BG		 1190 macsec_skb_cb(skb)->rx_sa = rx_sa;
1191
c09440f7
SD		 1192 /* Disabled && !changed text => skip validation */
1193 if (hdr->tci_an & MACSEC_TCI_C ||
1194 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1195 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1196
c3b7d0bd
SD		 1197 if (IS_ERR(skb)) {
1198 /* the decrypt callback needs the reference */
c78ebe1d 1199 if (PTR_ERR(skb) != -EINPROGRESS) {
c3b7d0bd 1200 macsec_rxsa_put(rx_sa);
c78ebe1d
SD		 1201 macsec_rxsc_put(rx_sc);
1202 }
c09440f7
SD		 1203 rcu_read_unlock();
1204 *pskb = NULL;
1205 return RX_HANDLER_CONSUMED;
1206 }
1207
1208 if (!macsec_post_decrypt(skb, secy, pn))
1209 goto drop;
1210
1211deliver:
1212 macsec_finalize_skb(skb, secy->icv_len,
1213 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1214 macsec_reset_skb(skb, secy->netdev);
1215
497f358a
SD		 1216 if (rx_sa)
1217 macsec_rxsa_put(rx_sa);
c78ebe1d 1218 macsec_rxsc_put(rx_sc);
5491e7c6
PA		 1219
1220 ret = gro_cells_receive(&macsec->gro_cells, skb);
1221 if (ret == NET_RX_SUCCESS)
1222 count_rx(dev, skb->len);
1223 else
1224 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1225
1226 rcu_read_unlock();
1227
5491e7c6
PA		 1228 *pskb = NULL;
1229 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1230
1231drop:
1232 macsec_rxsa_put(rx_sa);
1233drop_nosa:
c78ebe1d 1234 macsec_rxsc_put(rx_sc);
c09440f7
SD		 1235 rcu_read_unlock();
1236drop_direct:
1237 kfree_skb(skb);
1238 *pskb = NULL;
1239 return RX_HANDLER_CONSUMED;
1240
1241nosci:
1242 /* 10.6.1 if the SC is not found */
1243 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1244 if (!cbit)
1245 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1246 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1247
1248 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1249 struct sk_buff *nskb;
c09440f7
SD		 1250
1251 secy_stats = this_cpu_ptr(macsec->stats);
1252
1253 /* If validateFrames is Strict or the C bit in the
1254 * SecTAG is set, discard
1255 */
1256 if (cbit ||
1257 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1258 u64_stats_update_begin(&secy_stats->syncp);
1259 secy_stats->stats.InPktsNoSCI++;
1260 u64_stats_update_end(&secy_stats->syncp);
1261 continue;
1262 }
1263
1264 /* not strict, the frame (with the SecTAG and ICV
1265 * removed) is delivered to the Controlled Port.
1266 */
1267 nskb = skb_clone(skb, GFP_ATOMIC);
1268 if (!nskb)
1269 break;
1270
1271 macsec_reset_skb(nskb, macsec->secy.netdev);
1272
1273 ret = netif_rx(nskb);
1274 if (ret == NET_RX_SUCCESS) {
1275 u64_stats_update_begin(&secy_stats->syncp);
1276 secy_stats->stats.InPktsUnknownSCI++;
1277 u64_stats_update_end(&secy_stats->syncp);
1278 } else {
1279 macsec->secy.netdev->stats.rx_dropped++;
1280 }
1281 }
1282
1283 rcu_read_unlock();
1284 *pskb = skb;
1285 return RX_HANDLER_PASS;
1286}
1287
1288static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1289{
1290 struct crypto_aead *tfm;
1291 int ret;
1292
6052f7fb 1293 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
34aedfee
DC		 1294
1295 if (IS_ERR(tfm))
1296 return tfm;
c09440f7
SD		 1297
1298 ret = crypto_aead_setkey(tfm, key, key_len);
34aedfee
DC		 1299 if (ret < 0)
1300 goto fail;
c09440f7
SD		 1301
1302 ret = crypto_aead_setauthsize(tfm, icv_len);
34aedfee
DC		 1303 if (ret < 0)
1304 goto fail;
c09440f7
SD		 1305
1306 return tfm;
34aedfee
DC		 1307fail:
1308 crypto_free_aead(tfm);
1309 return ERR_PTR(ret);
c09440f7
SD		 1310}
1311
1312static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1313 int icv_len)
1314{
1315 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1316 if (!rx_sa->stats)
34aedfee 1317 return -ENOMEM;
c09440f7
SD		 1318
1319 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1320 if (IS_ERR(rx_sa->key.tfm)) {
c09440f7 1321 free_percpu(rx_sa->stats);
34aedfee 1322 return PTR_ERR(rx_sa->key.tfm);
c09440f7
SD		 1323 }
1324
1325 rx_sa->active = false;
1326 rx_sa->next_pn = 1;
1327 atomic_set(&rx_sa->refcnt, 1);
1328 spin_lock_init(&rx_sa->lock);
1329
1330 return 0;
1331}
1332
1333static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1334{
1335 rx_sa->active = false;
1336
1337 macsec_rxsa_put(rx_sa);
1338}
1339
1340static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1341{
1342 int i;
1343
1344 for (i = 0; i < MACSEC_NUM_AN; i++) {
1345 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1346
1347 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1348 if (sa)
1349 clear_rx_sa(sa);
1350 }
1351
1352 macsec_rxsc_put(rx_sc);
1353}
1354
1355static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1356{
1357 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1358
1359 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1360 rx_sc;
1361 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1362 if (rx_sc->sci == sci) {
1363 if (rx_sc->active)
1364 secy->n_rx_sc--;
1365 rcu_assign_pointer(*rx_scp, rx_sc->next);
1366 return rx_sc;
1367 }
1368 }
1369
1370 return NULL;
1371}
1372
1373static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1374{
1375 struct macsec_rx_sc *rx_sc;
1376 struct macsec_dev *macsec;
1377 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1378 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1379 struct macsec_secy *secy;
1380
1381 list_for_each_entry(macsec, &rxd->secys, secys) {
1382 if (find_rx_sc_rtnl(&macsec->secy, sci))
1383 return ERR_PTR(-EEXIST);
1384 }
1385
1386 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1387 if (!rx_sc)
1388 return ERR_PTR(-ENOMEM);
1389
1390 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1391 if (!rx_sc->stats) {
1392 kfree(rx_sc);
1393 return ERR_PTR(-ENOMEM);
1394 }
1395
1396 rx_sc->sci = sci;
1397 rx_sc->active = true;
1398 atomic_set(&rx_sc->refcnt, 1);
1399
1400 secy = &macsec_priv(dev)->secy;
1401 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1402 rcu_assign_pointer(secy->rx_sc, rx_sc);
1403
1404 if (rx_sc->active)
1405 secy->n_rx_sc++;
1406
1407 return rx_sc;
1408}
1409
1410static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1411 int icv_len)
1412{
1413 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1414 if (!tx_sa->stats)
34aedfee 1415 return -ENOMEM;
c09440f7
SD		 1416
1417 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1418 if (IS_ERR(tx_sa->key.tfm)) {
c09440f7 1419 free_percpu(tx_sa->stats);
34aedfee 1420 return PTR_ERR(tx_sa->key.tfm);
c09440f7
SD		 1421 }
1422
1423 tx_sa->active = false;
1424 atomic_set(&tx_sa->refcnt, 1);
1425 spin_lock_init(&tx_sa->lock);
1426
1427 return 0;
1428}
1429
1430static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1431{
1432 tx_sa->active = false;
1433
1434 macsec_txsa_put(tx_sa);
1435}
1436
489111e5 1437static struct genl_family macsec_fam;
c09440f7
SD		 1438
1439static struct net_device *get_dev_from_nl(struct net *net,
1440 struct nlattr **attrs)
1441{
1442 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1443 struct net_device *dev;
1444
1445 dev = __dev_get_by_index(net, ifindex);
1446 if (!dev)
1447 return ERR_PTR(-ENODEV);
1448
1449 if (!netif_is_macsec(dev))
1450 return ERR_PTR(-ENODEV);
1451
1452 return dev;
1453}
1454
1455static sci_t nla_get_sci(const struct nlattr *nla)
1456{
1457 return (__force sci_t)nla_get_u64(nla);
1458}
1459
f60d94c0
ND		 1460static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1461 int padattr)
c09440f7 1462{
f60d94c0 1463 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
c09440f7
SD		 1464}
1465
1466static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1467 struct nlattr **attrs,
1468 struct nlattr **tb_sa,
1469 struct net_device **devp,
1470 struct macsec_secy **secyp,
1471 struct macsec_tx_sc **scp,
1472 u8 *assoc_num)
1473{
1474 struct net_device *dev;
1475 struct macsec_secy *secy;
1476 struct macsec_tx_sc *tx_sc;
1477 struct macsec_tx_sa *tx_sa;
1478
1479 if (!tb_sa[MACSEC_SA_ATTR_AN])
1480 return ERR_PTR(-EINVAL);
1481
1482 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1483
1484 dev = get_dev_from_nl(net, attrs);
1485 if (IS_ERR(dev))
1486 return ERR_CAST(dev);
1487
1488 if (*assoc_num >= MACSEC_NUM_AN)
1489 return ERR_PTR(-EINVAL);
1490
1491 secy = &macsec_priv(dev)->secy;
1492 tx_sc = &secy->tx_sc;
1493
1494 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1495 if (!tx_sa)
1496 return ERR_PTR(-ENODEV);
1497
1498 *devp = dev;
1499 *scp = tx_sc;
1500 *secyp = secy;
1501 return tx_sa;
1502}
1503
1504static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1505 struct nlattr **attrs,
1506 struct nlattr **tb_rxsc,
1507 struct net_device **devp,
1508 struct macsec_secy **secyp)
1509{
1510 struct net_device *dev;
1511 struct macsec_secy *secy;
1512 struct macsec_rx_sc *rx_sc;
1513 sci_t sci;
1514
1515 dev = get_dev_from_nl(net, attrs);
1516 if (IS_ERR(dev))
1517 return ERR_CAST(dev);
1518
1519 secy = &macsec_priv(dev)->secy;
1520
1521 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1522 return ERR_PTR(-EINVAL);
1523
1524 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1525 rx_sc = find_rx_sc_rtnl(secy, sci);
1526 if (!rx_sc)
1527 return ERR_PTR(-ENODEV);
1528
1529 *secyp = secy;
1530 *devp = dev;
1531
1532 return rx_sc;
1533}
1534
1535static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1536 struct nlattr **attrs,
1537 struct nlattr **tb_rxsc,
1538 struct nlattr **tb_sa,
1539 struct net_device **devp,
1540 struct macsec_secy **secyp,
1541 struct macsec_rx_sc **scp,
1542 u8 *assoc_num)
1543{
1544 struct macsec_rx_sc *rx_sc;
1545 struct macsec_rx_sa *rx_sa;
1546
1547 if (!tb_sa[MACSEC_SA_ATTR_AN])
1548 return ERR_PTR(-EINVAL);
1549
1550 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1551 if (*assoc_num >= MACSEC_NUM_AN)
1552 return ERR_PTR(-EINVAL);
1553
1554 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1555 if (IS_ERR(rx_sc))
1556 return ERR_CAST(rx_sc);
1557
1558 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1559 if (!rx_sa)
1560 return ERR_PTR(-ENODEV);
1561
1562 *scp = rx_sc;
1563 return rx_sa;
1564}
1565
1566
1567static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1568 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1569 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1570 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1571};
1572
1573static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1574 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1575 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1576};
1577
1578static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1579 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1580 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1581 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
8acca6ac
SD		 1582 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1583 .len = MACSEC_KEYID_LEN, },
c09440f7
SD		 1584 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1585 .len = MACSEC_MAX_KEY_LEN, },
1586};
1587
1588static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1589{
1590 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1591 return -EINVAL;
1592
fceb6435
JB		 1593 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX,
1594 attrs[MACSEC_ATTR_SA_CONFIG],
1595 macsec_genl_sa_policy, NULL))
c09440f7
SD		 1596 return -EINVAL;
1597
1598 return 0;
1599}
1600
1601static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1602{
1603 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1604 return -EINVAL;
1605
fceb6435
JB		 1606 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX,
1607 attrs[MACSEC_ATTR_RXSC_CONFIG],
1608 macsec_genl_rxsc_policy, NULL))
c09440f7
SD		 1609 return -EINVAL;
1610
1611 return 0;
1612}
1613
1614static bool validate_add_rxsa(struct nlattr **attrs)
1615{
1616 if (!attrs[MACSEC_SA_ATTR_AN] ||
1617 !attrs[MACSEC_SA_ATTR_KEY] ||
1618 !attrs[MACSEC_SA_ATTR_KEYID])
1619 return false;
1620
1621 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1622 return false;
1623
1624 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1625 return false;
1626
1627 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1628 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1629 return false;
1630 }
1631
8acca6ac
SD		 1632 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1633 return false;
1634
c09440f7
SD		 1635 return true;
1636}
1637
1638static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1639{
1640 struct net_device *dev;
1641 struct nlattr **attrs = info->attrs;
1642 struct macsec_secy *secy;
1643 struct macsec_rx_sc *rx_sc;
1644 struct macsec_rx_sa *rx_sa;
1645 unsigned char assoc_num;
1646 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1647 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1648 int err;
c09440f7
SD		 1649
1650 if (!attrs[MACSEC_ATTR_IFINDEX])
1651 return -EINVAL;
1652
1653 if (parse_sa_config(attrs, tb_sa))
1654 return -EINVAL;
1655
1656 if (parse_rxsc_config(attrs, tb_rxsc))
1657 return -EINVAL;
1658
1659 if (!validate_add_rxsa(tb_sa))
1660 return -EINVAL;
1661
1662 rtnl_lock();
1663 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
36b232c8 1664 if (IS_ERR(rx_sc)) {
c09440f7
SD		 1665 rtnl_unlock();
1666 return PTR_ERR(rx_sc);
1667 }
1668
1669 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1670
1671 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1672 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1673 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1674 rtnl_unlock();
1675 return -EINVAL;
1676 }
1677
1678 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1679 if (rx_sa) {
1680 rtnl_unlock();
1681 return -EBUSY;
1682 }
1683
1684 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
34aedfee 1685 if (!rx_sa) {
c09440f7
SD		 1686 rtnl_unlock();
1687 return -ENOMEM;
1688 }
1689
34aedfee
DC		 1690 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1691 secy->key_len, secy->icv_len);
1692 if (err < 0) {
1693 kfree(rx_sa);
1694 rtnl_unlock();
1695 return err;
1696 }
1697
c09440f7
SD		 1698 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1699 spin_lock_bh(&rx_sa->lock);
1700 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1701 spin_unlock_bh(&rx_sa->lock);
1702 }
1703
1704 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1705 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1706
1968a0b8 1707 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1708 rx_sa->sc = rx_sc;
1709 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1710
1711 rtnl_unlock();
1712
1713 return 0;
1714}
1715
1716static bool validate_add_rxsc(struct nlattr **attrs)
1717{
1718 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1719 return false;
1720
1721 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1722 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1723 return false;
1724 }
1725
1726 return true;
1727}
1728
1729static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1730{
1731 struct net_device *dev;
1732 sci_t sci = MACSEC_UNDEF_SCI;
1733 struct nlattr **attrs = info->attrs;
1734 struct macsec_rx_sc *rx_sc;
1735 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1736
1737 if (!attrs[MACSEC_ATTR_IFINDEX])
1738 return -EINVAL;
1739
1740 if (parse_rxsc_config(attrs, tb_rxsc))
1741 return -EINVAL;
1742
1743 if (!validate_add_rxsc(tb_rxsc))
1744 return -EINVAL;
1745
1746 rtnl_lock();
1747 dev = get_dev_from_nl(genl_info_net(info), attrs);
1748 if (IS_ERR(dev)) {
1749 rtnl_unlock();
1750 return PTR_ERR(dev);
1751 }
1752
1753 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1754
1755 rx_sc = create_rx_sc(dev, sci);
1756 if (IS_ERR(rx_sc)) {
1757 rtnl_unlock();
1758 return PTR_ERR(rx_sc);
1759 }
1760
1761 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1762 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1763
1764 rtnl_unlock();
1765
1766 return 0;
1767}
1768
1769static bool validate_add_txsa(struct nlattr **attrs)
1770{
1771 if (!attrs[MACSEC_SA_ATTR_AN] ||
1772 !attrs[MACSEC_SA_ATTR_PN] ||
1773 !attrs[MACSEC_SA_ATTR_KEY] ||
1774 !attrs[MACSEC_SA_ATTR_KEYID])
1775 return false;
1776
1777 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1778 return false;
1779
1780 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1781 return false;
1782
1783 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1784 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1785 return false;
1786 }
1787
8acca6ac
SD		 1788 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1789 return false;
1790
c09440f7
SD		 1791 return true;
1792}
1793
1794static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1795{
1796 struct net_device *dev;
1797 struct nlattr **attrs = info->attrs;
1798 struct macsec_secy *secy;
1799 struct macsec_tx_sc *tx_sc;
1800 struct macsec_tx_sa *tx_sa;
1801 unsigned char assoc_num;
1802 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1803 int err;
c09440f7
SD		 1804
1805 if (!attrs[MACSEC_ATTR_IFINDEX])
1806 return -EINVAL;
1807
1808 if (parse_sa_config(attrs, tb_sa))
1809 return -EINVAL;
1810
1811 if (!validate_add_txsa(tb_sa))
1812 return -EINVAL;
1813
1814 rtnl_lock();
1815 dev = get_dev_from_nl(genl_info_net(info), attrs);
1816 if (IS_ERR(dev)) {
1817 rtnl_unlock();
1818 return PTR_ERR(dev);
1819 }
1820
1821 secy = &macsec_priv(dev)->secy;
1822 tx_sc = &secy->tx_sc;
1823
1824 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1825
1826 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1827 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1828 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1829 rtnl_unlock();
1830 return -EINVAL;
1831 }
1832
1833 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1834 if (tx_sa) {
1835 rtnl_unlock();
1836 return -EBUSY;
1837 }
1838
1839 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
34aedfee 1840 if (!tx_sa) {
c09440f7
SD		 1841 rtnl_unlock();
1842 return -ENOMEM;
1843 }
1844
34aedfee
DC		 1845 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1846 secy->key_len, secy->icv_len);
1847 if (err < 0) {
1848 kfree(tx_sa);
1849 rtnl_unlock();
1850 return err;
1851 }
1852
1968a0b8 1853 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1854
1855 spin_lock_bh(&tx_sa->lock);
1856 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1857 spin_unlock_bh(&tx_sa->lock);
1858
1859 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1860 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1861
1862 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1863 secy->operational = true;
1864
1865 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1866
1867 rtnl_unlock();
1868
1869 return 0;
1870}
1871
1872static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1873{
1874 struct nlattr **attrs = info->attrs;
1875 struct net_device *dev;
1876 struct macsec_secy *secy;
1877 struct macsec_rx_sc *rx_sc;
1878 struct macsec_rx_sa *rx_sa;
1879 u8 assoc_num;
1880 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1881 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1882
1883 if (!attrs[MACSEC_ATTR_IFINDEX])
1884 return -EINVAL;
1885
1886 if (parse_sa_config(attrs, tb_sa))
1887 return -EINVAL;
1888
1889 if (parse_rxsc_config(attrs, tb_rxsc))
1890 return -EINVAL;
1891
1892 rtnl_lock();
1893 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1894 &dev, &secy, &rx_sc, &assoc_num);
1895 if (IS_ERR(rx_sa)) {
1896 rtnl_unlock();
1897 return PTR_ERR(rx_sa);
1898 }
1899
1900 if (rx_sa->active) {
1901 rtnl_unlock();
1902 return -EBUSY;
1903 }
1904
1905 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1906 clear_rx_sa(rx_sa);
1907
1908 rtnl_unlock();
1909
1910 return 0;
1911}
1912
1913static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1914{
1915 struct nlattr **attrs = info->attrs;
1916 struct net_device *dev;
1917 struct macsec_secy *secy;
1918 struct macsec_rx_sc *rx_sc;
1919 sci_t sci;
1920 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1921
1922 if (!attrs[MACSEC_ATTR_IFINDEX])
1923 return -EINVAL;
1924
1925 if (parse_rxsc_config(attrs, tb_rxsc))
1926 return -EINVAL;
1927
1928 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1929 return -EINVAL;
1930
1931 rtnl_lock();
1932 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1933 if (IS_ERR(dev)) {
1934 rtnl_unlock();
1935 return PTR_ERR(dev);
1936 }
1937
1938 secy = &macsec_priv(dev)->secy;
1939 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1940
1941 rx_sc = del_rx_sc(secy, sci);
1942 if (!rx_sc) {
1943 rtnl_unlock();
1944 return -ENODEV;
1945 }
1946
1947 free_rx_sc(rx_sc);
1948 rtnl_unlock();
1949
1950 return 0;
1951}
1952
1953static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1954{
1955 struct nlattr **attrs = info->attrs;
1956 struct net_device *dev;
1957 struct macsec_secy *secy;
1958 struct macsec_tx_sc *tx_sc;
1959 struct macsec_tx_sa *tx_sa;
1960 u8 assoc_num;
1961 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1962
1963 if (!attrs[MACSEC_ATTR_IFINDEX])
1964 return -EINVAL;
1965
1966 if (parse_sa_config(attrs, tb_sa))
1967 return -EINVAL;
1968
1969 rtnl_lock();
1970 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1971 &dev, &secy, &tx_sc, &assoc_num);
1972 if (IS_ERR(tx_sa)) {
1973 rtnl_unlock();
1974 return PTR_ERR(tx_sa);
1975 }
1976
1977 if (tx_sa->active) {
1978 rtnl_unlock();
1979 return -EBUSY;
1980 }
1981
1982 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
1983 clear_tx_sa(tx_sa);
1984
1985 rtnl_unlock();
1986
1987 return 0;
1988}
1989
1990static bool validate_upd_sa(struct nlattr **attrs)
1991{
1992 if (!attrs[MACSEC_SA_ATTR_AN] ||
1993 attrs[MACSEC_SA_ATTR_KEY] ||
1994 attrs[MACSEC_SA_ATTR_KEYID])
1995 return false;
1996
1997 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1998 return false;
1999
2000 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2001 return false;
2002
2003 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2004 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2005 return false;
2006 }
2007
2008 return true;
2009}
2010
2011static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2012{
2013 struct nlattr **attrs = info->attrs;
2014 struct net_device *dev;
2015 struct macsec_secy *secy;
2016 struct macsec_tx_sc *tx_sc;
2017 struct macsec_tx_sa *tx_sa;
2018 u8 assoc_num;
2019 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2020
2021 if (!attrs[MACSEC_ATTR_IFINDEX])
2022 return -EINVAL;
2023
2024 if (parse_sa_config(attrs, tb_sa))
2025 return -EINVAL;
2026
2027 if (!validate_upd_sa(tb_sa))
2028 return -EINVAL;
2029
2030 rtnl_lock();
2031 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2032 &dev, &secy, &tx_sc, &assoc_num);
2033 if (IS_ERR(tx_sa)) {
2034 rtnl_unlock();
2035 return PTR_ERR(tx_sa);
2036 }
2037
2038 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2039 spin_lock_bh(&tx_sa->lock);
2040 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2041 spin_unlock_bh(&tx_sa->lock);
2042 }
2043
2044 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2045 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2046
2047 if (assoc_num == tx_sc->encoding_sa)
2048 secy->operational = tx_sa->active;
2049
2050 rtnl_unlock();
2051
2052 return 0;
2053}
2054
2055static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2056{
2057 struct nlattr **attrs = info->attrs;
2058 struct net_device *dev;
2059 struct macsec_secy *secy;
2060 struct macsec_rx_sc *rx_sc;
2061 struct macsec_rx_sa *rx_sa;
2062 u8 assoc_num;
2063 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2064 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2065
2066 if (!attrs[MACSEC_ATTR_IFINDEX])
2067 return -EINVAL;
2068
2069 if (parse_rxsc_config(attrs, tb_rxsc))
2070 return -EINVAL;
2071
2072 if (parse_sa_config(attrs, tb_sa))
2073 return -EINVAL;
2074
2075 if (!validate_upd_sa(tb_sa))
2076 return -EINVAL;
2077
2078 rtnl_lock();
2079 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2080 &dev, &secy, &rx_sc, &assoc_num);
2081 if (IS_ERR(rx_sa)) {
2082 rtnl_unlock();
2083 return PTR_ERR(rx_sa);
2084 }
2085
2086 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2087 spin_lock_bh(&rx_sa->lock);
2088 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2089 spin_unlock_bh(&rx_sa->lock);
2090 }
2091
2092 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2093 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2094
2095 rtnl_unlock();
2096 return 0;
2097}
2098
2099static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2100{
2101 struct nlattr **attrs = info->attrs;
2102 struct net_device *dev;
2103 struct macsec_secy *secy;
2104 struct macsec_rx_sc *rx_sc;
2105 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2106
2107 if (!attrs[MACSEC_ATTR_IFINDEX])
2108 return -EINVAL;
2109
2110 if (parse_rxsc_config(attrs, tb_rxsc))
2111 return -EINVAL;
2112
2113 if (!validate_add_rxsc(tb_rxsc))
2114 return -EINVAL;
2115
2116 rtnl_lock();
2117 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2118 if (IS_ERR(rx_sc)) {
2119 rtnl_unlock();
2120 return PTR_ERR(rx_sc);
2121 }
2122
2123 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2124 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2125
2126 if (rx_sc->active != new)
2127 secy->n_rx_sc += new ? 1 : -1;
2128
2129 rx_sc->active = new;
2130 }
2131
2132 rtnl_unlock();
2133
2134 return 0;
2135}
2136
2137static int copy_tx_sa_stats(struct sk_buff *skb,
2138 struct macsec_tx_sa_stats __percpu *pstats)
2139{
2140 struct macsec_tx_sa_stats sum = {0, };
2141 int cpu;
2142
2143 for_each_possible_cpu(cpu) {
2144 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2145
2146 sum.OutPktsProtected += stats->OutPktsProtected;
2147 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2148 }
2149
2150 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2151 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2152 return -EMSGSIZE;
2153
2154 return 0;
2155}
2156
2157static int copy_rx_sa_stats(struct sk_buff *skb,
2158 struct macsec_rx_sa_stats __percpu *pstats)
2159{
2160 struct macsec_rx_sa_stats sum = {0, };
2161 int cpu;
2162
2163 for_each_possible_cpu(cpu) {
2164 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2165
2166 sum.InPktsOK += stats->InPktsOK;
2167 sum.InPktsInvalid += stats->InPktsInvalid;
2168 sum.InPktsNotValid += stats->InPktsNotValid;
2169 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2170 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2171 }
2172
2173 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2174 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2175 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2176 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2177 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2178 return -EMSGSIZE;
2179
2180 return 0;
2181}
2182
2183static int copy_rx_sc_stats(struct sk_buff *skb,
2184 struct pcpu_rx_sc_stats __percpu *pstats)
2185{
2186 struct macsec_rx_sc_stats sum = {0, };
2187 int cpu;
2188
2189 for_each_possible_cpu(cpu) {
2190 const struct pcpu_rx_sc_stats *stats;
2191 struct macsec_rx_sc_stats tmp;
2192 unsigned int start;
2193
2194 stats = per_cpu_ptr(pstats, cpu);
2195 do {
2196 start = u64_stats_fetch_begin_irq(&stats->syncp);
2197 memcpy(&tmp, &stats->stats, sizeof(tmp));
2198 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2199
2200 sum.InOctetsValidated += tmp.InOctetsValidated;
2201 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2202 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2203 sum.InPktsDelayed += tmp.InPktsDelayed;
2204 sum.InPktsOK += tmp.InPktsOK;
2205 sum.InPktsInvalid += tmp.InPktsInvalid;
2206 sum.InPktsLate += tmp.InPktsLate;
2207 sum.InPktsNotValid += tmp.InPktsNotValid;
2208 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2209 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2210 }
2211
f60d94c0
ND		 2212 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2213 sum.InOctetsValidated,
2214 MACSEC_RXSC_STATS_ATTR_PAD) ||
2215 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2216 sum.InOctetsDecrypted,
2217 MACSEC_RXSC_STATS_ATTR_PAD) ||
2218 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2219 sum.InPktsUnchecked,
2220 MACSEC_RXSC_STATS_ATTR_PAD) ||
2221 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2222 sum.InPktsDelayed,
2223 MACSEC_RXSC_STATS_ATTR_PAD) ||
2224 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2225 sum.InPktsOK,
2226 MACSEC_RXSC_STATS_ATTR_PAD) ||
2227 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2228 sum.InPktsInvalid,
2229 MACSEC_RXSC_STATS_ATTR_PAD) ||
2230 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2231 sum.InPktsLate,
2232 MACSEC_RXSC_STATS_ATTR_PAD) ||
2233 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2234 sum.InPktsNotValid,
2235 MACSEC_RXSC_STATS_ATTR_PAD) ||
2236 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2237 sum.InPktsNotUsingSA,
2238 MACSEC_RXSC_STATS_ATTR_PAD) ||
2239 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2240 sum.InPktsUnusedSA,
2241 MACSEC_RXSC_STATS_ATTR_PAD))
c09440f7
SD		 2242 return -EMSGSIZE;
2243
2244 return 0;
2245}
2246
2247static int copy_tx_sc_stats(struct sk_buff *skb,
2248 struct pcpu_tx_sc_stats __percpu *pstats)
2249{
2250 struct macsec_tx_sc_stats sum = {0, };
2251 int cpu;
2252
2253 for_each_possible_cpu(cpu) {
2254 const struct pcpu_tx_sc_stats *stats;
2255 struct macsec_tx_sc_stats tmp;
2256 unsigned int start;
2257
2258 stats = per_cpu_ptr(pstats, cpu);
2259 do {
2260 start = u64_stats_fetch_begin_irq(&stats->syncp);
2261 memcpy(&tmp, &stats->stats, sizeof(tmp));
2262 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2263
2264 sum.OutPktsProtected += tmp.OutPktsProtected;
2265 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2266 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2267 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2268 }
2269
f60d94c0
ND		 2270 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2271 sum.OutPktsProtected,
2272 MACSEC_TXSC_STATS_ATTR_PAD) ||
2273 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2274 sum.OutPktsEncrypted,
2275 MACSEC_TXSC_STATS_ATTR_PAD) ||
2276 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2277 sum.OutOctetsProtected,
2278 MACSEC_TXSC_STATS_ATTR_PAD) ||
2279 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2280 sum.OutOctetsEncrypted,
2281 MACSEC_TXSC_STATS_ATTR_PAD))
c09440f7
SD		 2282 return -EMSGSIZE;
2283
2284 return 0;
2285}
2286
2287static int copy_secy_stats(struct sk_buff *skb,
2288 struct pcpu_secy_stats __percpu *pstats)
2289{
2290 struct macsec_dev_stats sum = {0, };
2291 int cpu;
2292
2293 for_each_possible_cpu(cpu) {
2294 const struct pcpu_secy_stats *stats;
2295 struct macsec_dev_stats tmp;
2296 unsigned int start;
2297
2298 stats = per_cpu_ptr(pstats, cpu);
2299 do {
2300 start = u64_stats_fetch_begin_irq(&stats->syncp);
2301 memcpy(&tmp, &stats->stats, sizeof(tmp));
2302 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2303
2304 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2305 sum.InPktsUntagged += tmp.InPktsUntagged;
2306 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2307 sum.InPktsNoTag += tmp.InPktsNoTag;
2308 sum.InPktsBadTag += tmp.InPktsBadTag;
2309 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2310 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2311 sum.InPktsOverrun += tmp.InPktsOverrun;
2312 }
2313
f60d94c0
ND		 2314 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2315 sum.OutPktsUntagged,
2316 MACSEC_SECY_STATS_ATTR_PAD) ||
2317 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2318 sum.InPktsUntagged,
2319 MACSEC_SECY_STATS_ATTR_PAD) ||
2320 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2321 sum.OutPktsTooLong,
2322 MACSEC_SECY_STATS_ATTR_PAD) ||
2323 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2324 sum.InPktsNoTag,
2325 MACSEC_SECY_STATS_ATTR_PAD) ||
2326 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2327 sum.InPktsBadTag,
2328 MACSEC_SECY_STATS_ATTR_PAD) ||
2329 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2330 sum.InPktsUnknownSCI,
2331 MACSEC_SECY_STATS_ATTR_PAD) ||
2332 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2333 sum.InPktsNoSCI,
2334 MACSEC_SECY_STATS_ATTR_PAD) ||
2335 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2336 sum.InPktsOverrun,
2337 MACSEC_SECY_STATS_ATTR_PAD))
c09440f7
SD		 2338 return -EMSGSIZE;
2339
2340 return 0;
2341}
2342
2343static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2344{
2345 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2346 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2347
2348 if (!secy_nest)
2349 return 1;
2350
f60d94c0
ND		 2351 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2352 MACSEC_SECY_ATTR_PAD) ||
2353 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
c0cc5316 2354 MACSEC_DEFAULT_CIPHER_ID,
f60d94c0 2355 MACSEC_SECY_ATTR_PAD) ||
c09440f7
SD		 2356 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2357 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2358 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2359 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2360 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2361 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2362 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2363 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2364 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2365 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2366 goto cancel;
2367
2368 if (secy->replay_protect) {
2369 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2370 goto cancel;
2371 }
2372
2373 nla_nest_end(skb, secy_nest);
2374 return 0;
2375
2376cancel:
2377 nla_nest_cancel(skb, secy_nest);
2378 return 1;
2379}
2380
2381static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2382 struct sk_buff *skb, struct netlink_callback *cb)
2383{
2384 struct macsec_rx_sc *rx_sc;
2385 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2386 struct nlattr *txsa_list, *rxsc_list;
2387 int i, j;
2388 void *hdr;
2389 struct nlattr *attr;
2390
2391 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2392 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2393 if (!hdr)
2394 return -EMSGSIZE;
2395
96cfc505 2396 genl_dump_check_consistent(cb, hdr, &macsec_fam);
c09440f7
SD		 2397
2398 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2399 goto nla_put_failure;
2400
2401 if (nla_put_secy(secy, skb))
2402 goto nla_put_failure;
2403
2404 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2405 if (!attr)
2406 goto nla_put_failure;
2407 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2408 nla_nest_cancel(skb, attr);
2409 goto nla_put_failure;
2410 }
2411 nla_nest_end(skb, attr);
2412
2413 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2414 if (!attr)
2415 goto nla_put_failure;
2416 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2417 nla_nest_cancel(skb, attr);
2418 goto nla_put_failure;
2419 }
2420 nla_nest_end(skb, attr);
2421
2422 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2423 if (!txsa_list)
2424 goto nla_put_failure;
2425 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2426 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2427 struct nlattr *txsa_nest;
2428
2429 if (!tx_sa)
2430 continue;
2431
2432 txsa_nest = nla_nest_start(skb, j++);
2433 if (!txsa_nest) {
2434 nla_nest_cancel(skb, txsa_list);
2435 goto nla_put_failure;
2436 }
2437
2438 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2439 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
8acca6ac 2440 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
c09440f7
SD		 2441 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2442 nla_nest_cancel(skb, txsa_nest);
2443 nla_nest_cancel(skb, txsa_list);
2444 goto nla_put_failure;
2445 }
2446
2447 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2448 if (!attr) {
2449 nla_nest_cancel(skb, txsa_nest);
2450 nla_nest_cancel(skb, txsa_list);
2451 goto nla_put_failure;
2452 }
2453 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2454 nla_nest_cancel(skb, attr);
2455 nla_nest_cancel(skb, txsa_nest);
2456 nla_nest_cancel(skb, txsa_list);
2457 goto nla_put_failure;
2458 }
2459 nla_nest_end(skb, attr);
2460
2461 nla_nest_end(skb, txsa_nest);
2462 }
2463 nla_nest_end(skb, txsa_list);
2464
2465 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2466 if (!rxsc_list)
2467 goto nla_put_failure;
2468
2469 j = 1;
2470 for_each_rxsc_rtnl(secy, rx_sc) {
2471 int k;
2472 struct nlattr *rxsa_list;
2473 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2474
2475 if (!rxsc_nest) {
2476 nla_nest_cancel(skb, rxsc_list);
2477 goto nla_put_failure;
2478 }
2479
2480 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
f60d94c0
ND		 2481 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2482 MACSEC_RXSC_ATTR_PAD)) {
c09440f7
SD		 2483 nla_nest_cancel(skb, rxsc_nest);
2484 nla_nest_cancel(skb, rxsc_list);
2485 goto nla_put_failure;
2486 }
2487
2488 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2489 if (!attr) {
2490 nla_nest_cancel(skb, rxsc_nest);
2491 nla_nest_cancel(skb, rxsc_list);
2492 goto nla_put_failure;
2493 }
2494 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2495 nla_nest_cancel(skb, attr);
2496 nla_nest_cancel(skb, rxsc_nest);
2497 nla_nest_cancel(skb, rxsc_list);
2498 goto nla_put_failure;
2499 }
2500 nla_nest_end(skb, attr);
2501
2502 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2503 if (!rxsa_list) {
2504 nla_nest_cancel(skb, rxsc_nest);
2505 nla_nest_cancel(skb, rxsc_list);
2506 goto nla_put_failure;
2507 }
2508
2509 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2510 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2511 struct nlattr *rxsa_nest;
2512
2513 if (!rx_sa)
2514 continue;
2515
2516 rxsa_nest = nla_nest_start(skb, k++);
2517 if (!rxsa_nest) {
2518 nla_nest_cancel(skb, rxsa_list);
2519 nla_nest_cancel(skb, rxsc_nest);
2520 nla_nest_cancel(skb, rxsc_list);
2521 goto nla_put_failure;
2522 }
2523
2524 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2525 if (!attr) {
2526 nla_nest_cancel(skb, rxsa_list);
2527 nla_nest_cancel(skb, rxsc_nest);
2528 nla_nest_cancel(skb, rxsc_list);
2529 goto nla_put_failure;
2530 }
2531 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2532 nla_nest_cancel(skb, attr);
2533 nla_nest_cancel(skb, rxsa_list);
2534 nla_nest_cancel(skb, rxsc_nest);
2535 nla_nest_cancel(skb, rxsc_list);
2536 goto nla_put_failure;
2537 }
2538 nla_nest_end(skb, attr);
2539
2540 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2541 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
8acca6ac 2542 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
c09440f7
SD		 2543 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2544 nla_nest_cancel(skb, rxsa_nest);
2545 nla_nest_cancel(skb, rxsc_nest);
2546 nla_nest_cancel(skb, rxsc_list);
2547 goto nla_put_failure;
2548 }
2549 nla_nest_end(skb, rxsa_nest);
2550 }
2551
2552 nla_nest_end(skb, rxsa_list);
2553 nla_nest_end(skb, rxsc_nest);
2554 }
2555
2556 nla_nest_end(skb, rxsc_list);
2557
c09440f7
SD		 2558 genlmsg_end(skb, hdr);
2559
2560 return 0;
2561
2562nla_put_failure:
c09440f7
SD		 2563 genlmsg_cancel(skb, hdr);
2564 return -EMSGSIZE;
2565}
2566
96cfc505
SD		 2567static int macsec_generation = 1; /* protected by RTNL */
2568
c09440f7
SD		 2569static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2570{
2571 struct net *net = sock_net(skb->sk);
2572 struct net_device *dev;
2573 int dev_idx, d;
2574
2575 dev_idx = cb->args[0];
2576
2577 d = 0;
c10c63ea 2578 rtnl_lock();
96cfc505
SD		 2579
2580 cb->seq = macsec_generation;
2581
c09440f7
SD		 2582 for_each_netdev(net, dev) {
2583 struct macsec_secy *secy;
2584
2585 if (d < dev_idx)
2586 goto next;
2587
2588 if (!netif_is_macsec(dev))
2589 goto next;
2590
2591 secy = &macsec_priv(dev)->secy;
2592 if (dump_secy(secy, dev, skb, cb) < 0)
2593 goto done;
2594next:
2595 d++;
2596 }
2597
2598done:
c10c63ea 2599 rtnl_unlock();
c09440f7
SD		 2600 cb->args[0] = d;
2601 return skb->len;
2602}
2603
2604static const struct genl_ops macsec_genl_ops[] = {
2605 {
2606 .cmd = MACSEC_CMD_GET_TXSC,
2607 .dumpit = macsec_dump_txsc,
2608 .policy = macsec_genl_policy,
2609 },
2610 {
2611 .cmd = MACSEC_CMD_ADD_RXSC,
2612 .doit = macsec_add_rxsc,
2613 .policy = macsec_genl_policy,
2614 .flags = GENL_ADMIN_PERM,
2615 },
2616 {
2617 .cmd = MACSEC_CMD_DEL_RXSC,
2618 .doit = macsec_del_rxsc,
2619 .policy = macsec_genl_policy,
2620 .flags = GENL_ADMIN_PERM,
2621 },
2622 {
2623 .cmd = MACSEC_CMD_UPD_RXSC,
2624 .doit = macsec_upd_rxsc,
2625 .policy = macsec_genl_policy,
2626 .flags = GENL_ADMIN_PERM,
2627 },
2628 {
2629 .cmd = MACSEC_CMD_ADD_TXSA,
2630 .doit = macsec_add_txsa,
2631 .policy = macsec_genl_policy,
2632 .flags = GENL_ADMIN_PERM,
2633 },
2634 {
2635 .cmd = MACSEC_CMD_DEL_TXSA,
2636 .doit = macsec_del_txsa,
2637 .policy = macsec_genl_policy,
2638 .flags = GENL_ADMIN_PERM,
2639 },
2640 {
2641 .cmd = MACSEC_CMD_UPD_TXSA,
2642 .doit = macsec_upd_txsa,
2643 .policy = macsec_genl_policy,
2644 .flags = GENL_ADMIN_PERM,
2645 },
2646 {
2647 .cmd = MACSEC_CMD_ADD_RXSA,
2648 .doit = macsec_add_rxsa,
2649 .policy = macsec_genl_policy,
2650 .flags = GENL_ADMIN_PERM,
2651 },
2652 {
2653 .cmd = MACSEC_CMD_DEL_RXSA,
2654 .doit = macsec_del_rxsa,
2655 .policy = macsec_genl_policy,
2656 .flags = GENL_ADMIN_PERM,
2657 },
2658 {
2659 .cmd = MACSEC_CMD_UPD_RXSA,
2660 .doit = macsec_upd_rxsa,
2661 .policy = macsec_genl_policy,
2662 .flags = GENL_ADMIN_PERM,
2663 },
2664};
2665
56989f6d 2666static struct genl_family macsec_fam __ro_after_init = {
489111e5
JB		 2667 .name = MACSEC_GENL_NAME,
2668 .hdrsize = 0,
2669 .version = MACSEC_GENL_VERSION,
2670 .maxattr = MACSEC_ATTR_MAX,
2671 .netnsok = true,
2672 .module = THIS_MODULE,
2673 .ops = macsec_genl_ops,
2674 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2675};
2676
c09440f7
SD		 2677static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2678 struct net_device *dev)
2679{
2680 struct macsec_dev *macsec = netdev_priv(dev);
2681 struct macsec_secy *secy = &macsec->secy;
2682 struct pcpu_secy_stats *secy_stats;
2683 int ret, len;
2684
2685 /* 10.5 */
2686 if (!secy->protect_frames) {
2687 secy_stats = this_cpu_ptr(macsec->stats);
2688 u64_stats_update_begin(&secy_stats->syncp);
2689 secy_stats->stats.OutPktsUntagged++;
2690 u64_stats_update_end(&secy_stats->syncp);
79c62220 2691 skb->dev = macsec->real_dev;
c09440f7
SD		 2692 len = skb->len;
2693 ret = dev_queue_xmit(skb);
2694 count_tx(dev, ret, len);
2695 return ret;
2696 }
2697
2698 if (!secy->operational) {
2699 kfree_skb(skb);
2700 dev->stats.tx_dropped++;
2701 return NETDEV_TX_OK;
2702 }
2703
2704 skb = macsec_encrypt(skb, dev);
2705 if (IS_ERR(skb)) {
2706 if (PTR_ERR(skb) != -EINPROGRESS)
2707 dev->stats.tx_dropped++;
2708 return NETDEV_TX_OK;
2709 }
2710
2711 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2712
2713 macsec_encrypt_finish(skb, dev);
2714 len = skb->len;
2715 ret = dev_queue_xmit(skb);
2716 count_tx(dev, ret, len);
2717 return ret;
2718}
2719
2720#define MACSEC_FEATURES \
2721 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
e2003872
SD		 2722static struct lock_class_key macsec_netdev_addr_lock_key;
2723
c09440f7
SD		 2724static int macsec_dev_init(struct net_device *dev)
2725{
2726 struct macsec_dev *macsec = macsec_priv(dev);
2727 struct net_device *real_dev = macsec->real_dev;
5491e7c6 2728 int err;
c09440f7
SD		 2729
2730 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2731 if (!dev->tstats)
2732 return -ENOMEM;
2733
5491e7c6
PA		 2734 err = gro_cells_init(&macsec->gro_cells, dev);
2735 if (err) {
2736 free_percpu(dev->tstats);
2737 return err;
2738 }
2739
c09440f7
SD		 2740 dev->features = real_dev->features & MACSEC_FEATURES;
2741 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2742
2743 dev->needed_headroom = real_dev->needed_headroom +
2744 MACSEC_NEEDED_HEADROOM;
2745 dev->needed_tailroom = real_dev->needed_tailroom +
2746 MACSEC_NEEDED_TAILROOM;
2747
2748 if (is_zero_ether_addr(dev->dev_addr))
2749 eth_hw_addr_inherit(dev, real_dev);
2750 if (is_zero_ether_addr(dev->broadcast))
2751 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2752
2753 return 0;
2754}
2755
2756static void macsec_dev_uninit(struct net_device *dev)
2757{
5491e7c6
PA		 2758 struct macsec_dev *macsec = macsec_priv(dev);
2759
2760 gro_cells_destroy(&macsec->gro_cells);
c09440f7
SD		 2761 free_percpu(dev->tstats);
2762}
2763
2764static netdev_features_t macsec_fix_features(struct net_device *dev,
2765 netdev_features_t features)
2766{
2767 struct macsec_dev *macsec = macsec_priv(dev);
2768 struct net_device *real_dev = macsec->real_dev;
2769
5491e7c6
PA		 2770 features &= (real_dev->features & MACSEC_FEATURES) |
2771 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2772 features |= NETIF_F_LLTX;
c09440f7
SD		 2773
2774 return features;
2775}
2776
2777static int macsec_dev_open(struct net_device *dev)
2778{
2779 struct macsec_dev *macsec = macsec_priv(dev);
2780 struct net_device *real_dev = macsec->real_dev;
2781 int err;
2782
2783 if (!(real_dev->flags & IFF_UP))
2784 return -ENETDOWN;
2785
2786 err = dev_uc_add(real_dev, dev->dev_addr);
2787 if (err < 0)
2788 return err;
2789
2790 if (dev->flags & IFF_ALLMULTI) {
2791 err = dev_set_allmulti(real_dev, 1);
2792 if (err < 0)
2793 goto del_unicast;
2794 }
2795
2796 if (dev->flags & IFF_PROMISC) {
2797 err = dev_set_promiscuity(real_dev, 1);
2798 if (err < 0)
2799 goto clear_allmulti;
2800 }
2801
2802 if (netif_carrier_ok(real_dev))
2803 netif_carrier_on(dev);
2804
2805 return 0;
2806clear_allmulti:
2807 if (dev->flags & IFF_ALLMULTI)
2808 dev_set_allmulti(real_dev, -1);
2809del_unicast:
2810 dev_uc_del(real_dev, dev->dev_addr);
2811 netif_carrier_off(dev);
2812 return err;
2813}
2814
2815static int macsec_dev_stop(struct net_device *dev)
2816{
2817 struct macsec_dev *macsec = macsec_priv(dev);
2818 struct net_device *real_dev = macsec->real_dev;
2819
2820 netif_carrier_off(dev);
2821
2822 dev_mc_unsync(real_dev, dev);
2823 dev_uc_unsync(real_dev, dev);
2824
2825 if (dev->flags & IFF_ALLMULTI)
2826 dev_set_allmulti(real_dev, -1);
2827
2828 if (dev->flags & IFF_PROMISC)
2829 dev_set_promiscuity(real_dev, -1);
2830
2831 dev_uc_del(real_dev, dev->dev_addr);
2832
2833 return 0;
2834}
2835
2836static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2837{
2838 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2839
2840 if (!(dev->flags & IFF_UP))
2841 return;
2842
2843 if (change & IFF_ALLMULTI)
2844 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2845
2846 if (change & IFF_PROMISC)
2847 dev_set_promiscuity(real_dev,
2848 dev->flags & IFF_PROMISC ? 1 : -1);
2849}
2850
2851static void macsec_dev_set_rx_mode(struct net_device *dev)
2852{
2853 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2854
2855 dev_mc_sync(real_dev, dev);
2856 dev_uc_sync(real_dev, dev);
2857}
2858
2859static int macsec_set_mac_address(struct net_device *dev, void *p)
2860{
2861 struct macsec_dev *macsec = macsec_priv(dev);
2862 struct net_device *real_dev = macsec->real_dev;
2863 struct sockaddr *addr = p;
2864 int err;
2865
2866 if (!is_valid_ether_addr(addr->sa_data))
2867 return -EADDRNOTAVAIL;
2868
2869 if (!(dev->flags & IFF_UP))
2870 goto out;
2871
2872 err = dev_uc_add(real_dev, addr->sa_data);
2873 if (err < 0)
2874 return err;
2875
2876 dev_uc_del(real_dev, dev->dev_addr);
2877
2878out:
2879 ether_addr_copy(dev->dev_addr, addr->sa_data);
2880 return 0;
2881}
2882
2883static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2884{
2885 struct macsec_dev *macsec = macsec_priv(dev);
2886 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2887
2888 if (macsec->real_dev->mtu - extra < new_mtu)
2889 return -ERANGE;
2890
2891 dev->mtu = new_mtu;
2892
2893 return 0;
2894}
2895
bc1f4470 2896static void macsec_get_stats64(struct net_device *dev,
2897 struct rtnl_link_stats64 *s)
c09440f7
SD		 2898{
2899 int cpu;
2900
2901 if (!dev->tstats)
bc1f4470 2902 return;
c09440f7
SD		 2903
2904 for_each_possible_cpu(cpu) {
2905 struct pcpu_sw_netstats *stats;
2906 struct pcpu_sw_netstats tmp;
2907 int start;
2908
2909 stats = per_cpu_ptr(dev->tstats, cpu);
2910 do {
2911 start = u64_stats_fetch_begin_irq(&stats->syncp);
2912 tmp.rx_packets = stats->rx_packets;
2913 tmp.rx_bytes = stats->rx_bytes;
2914 tmp.tx_packets = stats->tx_packets;
2915 tmp.tx_bytes = stats->tx_bytes;
2916 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2917
2918 s->rx_packets += tmp.rx_packets;
2919 s->rx_bytes += tmp.rx_bytes;
2920 s->tx_packets += tmp.tx_packets;
2921 s->tx_bytes += tmp.tx_bytes;
2922 }
2923
2924 s->rx_dropped = dev->stats.rx_dropped;
2925 s->tx_dropped = dev->stats.tx_dropped;
c09440f7
SD		 2926}
2927
2928static int macsec_get_iflink(const struct net_device *dev)
2929{
2930 return macsec_priv(dev)->real_dev->ifindex;
2931}
2932
e2003872
SD		 2933
2934static int macsec_get_nest_level(struct net_device *dev)
2935{
2936 return macsec_priv(dev)->nest_level;
2937}
2938
2939
c09440f7
SD		 2940static const struct net_device_ops macsec_netdev_ops = {
2941 .ndo_init = macsec_dev_init,
2942 .ndo_uninit = macsec_dev_uninit,
2943 .ndo_open = macsec_dev_open,
2944 .ndo_stop = macsec_dev_stop,
2945 .ndo_fix_features = macsec_fix_features,
2946 .ndo_change_mtu = macsec_change_mtu,
2947 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2948 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2949 .ndo_set_mac_address = macsec_set_mac_address,
2950 .ndo_start_xmit = macsec_start_xmit,
2951 .ndo_get_stats64 = macsec_get_stats64,
2952 .ndo_get_iflink = macsec_get_iflink,
e2003872 2953 .ndo_get_lock_subclass = macsec_get_nest_level,
c09440f7
SD		 2954};
2955
2956static const struct device_type macsec_type = {
2957 .name = "macsec",
2958};
2959
2960static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2961 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2962 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2963 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2964 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2965 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2966 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2967 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2968 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2969 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2970 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2971 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2972 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2973};
2974
2975static void macsec_free_netdev(struct net_device *dev)
2976{
2977 struct macsec_dev *macsec = macsec_priv(dev);
2978 struct net_device *real_dev = macsec->real_dev;
2979
2980 free_percpu(macsec->stats);
2981 free_percpu(macsec->secy.tx_sc.stats);
2982
2983 dev_put(real_dev);
2984 free_netdev(dev);
2985}
2986
2987static void macsec_setup(struct net_device *dev)
2988{
2989 ether_setup(dev);
91572088
JW		 2990 dev->min_mtu = 0;
2991 dev->max_mtu = ETH_MAX_MTU;
e425974f 2992 dev->priv_flags |= IFF_NO_QUEUE;
c09440f7
SD		 2993 dev->netdev_ops = &macsec_netdev_ops;
2994 dev->destructor = macsec_free_netdev;
c24acf03 2995 SET_NETDEV_DEVTYPE(dev, &macsec_type);
c09440f7
SD		 2996
2997 eth_zero_addr(dev->broadcast);
2998}
2999
3000static void macsec_changelink_common(struct net_device *dev,
3001 struct nlattr *data[])
3002{
3003 struct macsec_secy *secy;
3004 struct macsec_tx_sc *tx_sc;
3005
3006 secy = &macsec_priv(dev)->secy;
3007 tx_sc = &secy->tx_sc;
3008
3009 if (data[IFLA_MACSEC_ENCODING_SA]) {
3010 struct macsec_tx_sa *tx_sa;
3011
3012 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3013 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3014
3015 secy->operational = tx_sa && tx_sa->active;
3016 }
3017
3018 if (data[IFLA_MACSEC_WINDOW])
3019 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3020
3021 if (data[IFLA_MACSEC_ENCRYPT])
3022 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3023
3024 if (data[IFLA_MACSEC_PROTECT])
3025 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3026
3027 if (data[IFLA_MACSEC_INC_SCI])
3028 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3029
3030 if (data[IFLA_MACSEC_ES])
3031 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3032
3033 if (data[IFLA_MACSEC_SCB])
3034 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3035
3036 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3037 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3038
3039 if (data[IFLA_MACSEC_VALIDATION])
3040 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3041}
3042
3043static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3044 struct nlattr *data[])
3045{
3046 if (!data)
3047 return 0;
3048
3049 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3050 data[IFLA_MACSEC_ICV_LEN] ||
3051 data[IFLA_MACSEC_SCI] ||
3052 data[IFLA_MACSEC_PORT])
3053 return -EINVAL;
3054
3055 macsec_changelink_common(dev, data);
3056
3057 return 0;
3058}
3059
3060static void macsec_del_dev(struct macsec_dev *macsec)
3061{
3062 int i;
3063
3064 while (macsec->secy.rx_sc) {
3065 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3066
3067 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3068 free_rx_sc(rx_sc);
3069 }
3070
3071 for (i = 0; i < MACSEC_NUM_AN; i++) {
3072 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3073
3074 if (sa) {
3075 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3076 clear_tx_sa(sa);
3077 }
3078 }
3079}
3080
bbe11fab
SD		 3081static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3082{
3083 struct macsec_dev *macsec = macsec_priv(dev);
e2003872 3084 struct net_device *real_dev = macsec->real_dev;
bbe11fab
SD		 3085
3086 unregister_netdevice_queue(dev, head);
3087 list_del_rcu(&macsec->secys);
3088 macsec_del_dev(macsec);
e2003872 3089 netdev_upper_dev_unlink(real_dev, dev);
bbe11fab
SD		 3090
3091 macsec_generation++;
3092}
3093
c09440f7
SD		 3094static void macsec_dellink(struct net_device *dev, struct list_head *head)
3095{
3096 struct macsec_dev *macsec = macsec_priv(dev);
3097 struct net_device *real_dev = macsec->real_dev;
3098 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3099
bbe11fab 3100 macsec_common_dellink(dev, head);
96cfc505 3101
960d5848 3102 if (list_empty(&rxd->secys)) {
c09440f7 3103 netdev_rx_handler_unregister(real_dev);
960d5848
SD		 3104 kfree(rxd);
3105 }
c09440f7
SD		 3106}
3107
3108static int register_macsec_dev(struct net_device *real_dev,
3109 struct net_device *dev)
3110{
3111 struct macsec_dev *macsec = macsec_priv(dev);
3112 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3113
3114 if (!rxd) {
3115 int err;
3116
3117 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3118 if (!rxd)
3119 return -ENOMEM;
3120
3121 INIT_LIST_HEAD(&rxd->secys);
3122
3123 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3124 rxd);
960d5848
SD		 3125 if (err < 0) {
3126 kfree(rxd);
c09440f7 3127 return err;
960d5848 3128 }
c09440f7
SD		 3129 }
3130
3131 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3132 return 0;
3133}
3134
3135static bool sci_exists(struct net_device *dev, sci_t sci)
3136{
3137 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3138 struct macsec_dev *macsec;
3139
3140 list_for_each_entry(macsec, &rxd->secys, secys) {
3141 if (macsec->secy.sci == sci)
3142 return true;
3143 }
3144
3145 return false;
3146}
3147
3148static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3149{
3150 return make_sci(dev->dev_addr, port);
3151}
3152
3153static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3154{
3155 struct macsec_dev *macsec = macsec_priv(dev);
3156 struct macsec_secy *secy = &macsec->secy;
3157
3158 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3159 if (!macsec->stats)
3160 return -ENOMEM;
3161
3162 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3163 if (!secy->tx_sc.stats) {
3164 free_percpu(macsec->stats);
3165 return -ENOMEM;
3166 }
3167
3168 if (sci == MACSEC_UNDEF_SCI)
3169 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3170
3171 secy->netdev = dev;
3172 secy->operational = true;
3173 secy->key_len = DEFAULT_SAK_LEN;
3174 secy->icv_len = icv_len;
3175 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3176 secy->protect_frames = true;
3177 secy->replay_protect = false;
3178
3179 secy->sci = sci;
3180 secy->tx_sc.active = true;
3181 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3182 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3183 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3184 secy->tx_sc.end_station = false;
3185 secy->tx_sc.scb = false;
3186
3187 return 0;
3188}
3189
3190static int macsec_newlink(struct net *net, struct net_device *dev,
3191 struct nlattr *tb[], struct nlattr *data[])
3192{
3193 struct macsec_dev *macsec = macsec_priv(dev);
3194 struct net_device *real_dev;
3195 int err;
3196 sci_t sci;
3197 u8 icv_len = DEFAULT_ICV_LEN;
3198 rx_handler_func_t *rx_handler;
3199
3200 if (!tb[IFLA_LINK])
3201 return -EINVAL;
3202 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3203 if (!real_dev)
3204 return -ENODEV;
3205
3206 dev->priv_flags |= IFF_MACSEC;
3207
3208 macsec->real_dev = real_dev;
3209
3210 if (data && data[IFLA_MACSEC_ICV_LEN])
3211 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3212 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3213
3214 rx_handler = rtnl_dereference(real_dev->rx_handler);
3215 if (rx_handler && rx_handler != macsec_handle_frame)
3216 return -EBUSY;
3217
3218 err = register_netdevice(dev);
3219 if (err < 0)
3220 return err;
3221
0759e552
SD		 3222 dev_hold(real_dev);
3223
952fcfd0 3224 macsec->nest_level = dev_get_nest_level(real_dev) + 1;
e2003872
SD		 3225 netdev_lockdep_set_classes(dev);
3226 lockdep_set_class_and_subclass(&dev->addr_list_lock,
3227 &macsec_netdev_addr_lock_key,
3228 macsec_get_nest_level(dev));
3229
3230 err = netdev_upper_dev_link(real_dev, dev);
3231 if (err < 0)
3232 goto unregister;
3233
c09440f7
SD		 3234 /* need to be already registered so that ->init has run and
3235 * the MAC addr is set
3236 */
3237 if (data && data[IFLA_MACSEC_SCI])
3238 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3239 else if (data && data[IFLA_MACSEC_PORT])
3240 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3241 else
3242 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3243
3244 if (rx_handler && sci_exists(real_dev, sci)) {
3245 err = -EBUSY;
e2003872 3246 goto unlink;
c09440f7
SD		 3247 }
3248
3249 err = macsec_add_dev(dev, sci, icv_len);
3250 if (err)
e2003872 3251 goto unlink;
c09440f7
SD		 3252
3253 if (data)
3254 macsec_changelink_common(dev, data);
3255
3256 err = register_macsec_dev(real_dev, dev);
3257 if (err < 0)
3258 goto del_dev;
3259
96cfc505
SD		 3260 macsec_generation++;
3261
c09440f7
SD		 3262 return 0;
3263
3264del_dev:
3265 macsec_del_dev(macsec);
e2003872
SD		 3266unlink:
3267 netdev_upper_dev_unlink(real_dev, dev);
c09440f7
SD		 3268unregister:
3269 unregister_netdevice(dev);
3270 return err;
3271}
3272
3273static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[])
3274{
74816480 3275 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
c09440f7
SD		 3276 u8 icv_len = DEFAULT_ICV_LEN;
3277 int flag;
3278 bool es, scb, sci;
3279
3280 if (!data)
3281 return 0;
3282
3283 if (data[IFLA_MACSEC_CIPHER_SUITE])
3284 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3285
f04c392d 3286 if (data[IFLA_MACSEC_ICV_LEN]) {
c09440f7 3287 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
f04c392d
DC		 3288 if (icv_len != DEFAULT_ICV_LEN) {
3289 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3290 struct crypto_aead *dummy_tfm;
3291
3292 dummy_tfm = macsec_alloc_tfm(dummy_key,
3293 DEFAULT_SAK_LEN,
3294 icv_len);
3295 if (IS_ERR(dummy_tfm))
3296 return PTR_ERR(dummy_tfm);
3297 crypto_free_aead(dummy_tfm);
3298 }
3299 }
c09440f7
SD		 3300
3301 switch (csid) {
74816480
SD		 3302 case MACSEC_DEFAULT_CIPHER_ID:
3303 case MACSEC_DEFAULT_CIPHER_ALT:
c09440f7 3304 if (icv_len < MACSEC_MIN_ICV_LEN ||
2ccbe2cb 3305 icv_len > MACSEC_STD_ICV_LEN)
c09440f7
SD		 3306 return -EINVAL;
3307 break;
3308 default:
3309 return -EINVAL;
3310 }
3311
3312 if (data[IFLA_MACSEC_ENCODING_SA]) {
3313 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3314 return -EINVAL;
3315 }
3316
3317 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3318 flag < IFLA_MACSEC_VALIDATION;
3319 flag++) {
3320 if (data[flag]) {
3321 if (nla_get_u8(data[flag]) > 1)
3322 return -EINVAL;
3323 }
3324 }
3325
3326 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3327 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3328 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3329
3330 if ((sci && (scb || es)) || (scb && es))
3331 return -EINVAL;
3332
3333 if (data[IFLA_MACSEC_VALIDATION] &&
3334 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3335 return -EINVAL;
3336
4b1fb935
SD		 3337 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3338 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
c09440f7
SD		 3339 !data[IFLA_MACSEC_WINDOW])
3340 return -EINVAL;
3341
3342 return 0;
3343}
3344
3345static struct net *macsec_get_link_net(const struct net_device *dev)
3346{
3347 return dev_net(macsec_priv(dev)->real_dev);
3348}
3349
3350static size_t macsec_get_size(const struct net_device *dev)
3351{
c9fba3ed
ZS		 3352 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3353 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3354 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3355 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3356 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3357 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3358 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3359 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3360 nla_total_size(1) + /* IFLA_MACSEC_ES */
3361 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3362 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3363 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
c09440f7
SD		 3364 0;
3365}
3366
3367static int macsec_fill_info(struct sk_buff *skb,
3368 const struct net_device *dev)
3369{
3370 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3371 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3372
f60d94c0
ND		 3373 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3374 IFLA_MACSEC_PAD) ||
c09440f7 3375 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
f60d94c0 3376 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
c0cc5316 3377 MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) ||
c09440f7
SD		 3378 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3379 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3380 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3381 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3382 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3383 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3384 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3385 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3386 0)
3387 goto nla_put_failure;
3388
3389 if (secy->replay_protect) {
3390 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3391 goto nla_put_failure;
3392 }
3393
3394 return 0;
3395
3396nla_put_failure:
3397 return -EMSGSIZE;
3398}
3399
3400static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3401 .kind = "macsec",
3402 .priv_size = sizeof(struct macsec_dev),
3403 .maxtype = IFLA_MACSEC_MAX,
3404 .policy = macsec_rtnl_policy,
3405 .setup = macsec_setup,
3406 .validate = macsec_validate_attr,
3407 .newlink = macsec_newlink,
3408 .changelink = macsec_changelink,
3409 .dellink = macsec_dellink,
3410 .get_size = macsec_get_size,
3411 .fill_info = macsec_fill_info,
3412 .get_link_net = macsec_get_link_net,
3413};
3414
3415static bool is_macsec_master(struct net_device *dev)
3416{
3417 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3418}
3419
3420static int macsec_notify(struct notifier_block *this, unsigned long event,
3421 void *ptr)
3422{
3423 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3424 LIST_HEAD(head);
3425
3426 if (!is_macsec_master(real_dev))
3427 return NOTIFY_DONE;
3428
3429 switch (event) {
3430 case NETDEV_UNREGISTER: {
3431 struct macsec_dev *m, *n;
3432 struct macsec_rxh_data *rxd;
3433
3434 rxd = macsec_data_rtnl(real_dev);
3435 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
bbe11fab 3436 macsec_common_dellink(m->secy.netdev, &head);
c09440f7 3437 }
bbe11fab
SD		 3438
3439 netdev_rx_handler_unregister(real_dev);
3440 kfree(rxd);
3441
c09440f7
SD		 3442 unregister_netdevice_many(&head);
3443 break;
3444 }
3445 case NETDEV_CHANGEMTU: {
3446 struct macsec_dev *m;
3447 struct macsec_rxh_data *rxd;
3448
3449 rxd = macsec_data_rtnl(real_dev);
3450 list_for_each_entry(m, &rxd->secys, secys) {
3451 struct net_device *dev = m->secy.netdev;
3452 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3453 macsec_extra_len(true));
3454
3455 if (dev->mtu > mtu)
3456 dev_set_mtu(dev, mtu);
3457 }
3458 }
3459 }
3460
3461 return NOTIFY_OK;
3462}
3463
3464static struct notifier_block macsec_notifier = {
3465 .notifier_call = macsec_notify,
3466};
3467
3468static int __init macsec_init(void)
3469{
3470 int err;
3471
3472 pr_info("MACsec IEEE 802.1AE\n");
3473 err = register_netdevice_notifier(&macsec_notifier);
3474 if (err)
3475 return err;
3476
3477 err = rtnl_link_register(&macsec_link_ops);
3478 if (err)
3479 goto notifier;
3480
489111e5 3481 err = genl_register_family(&macsec_fam);
c09440f7
SD		 3482 if (err)
3483 goto rtnl;
3484
3485 return 0;
3486
3487rtnl:
3488 rtnl_link_unregister(&macsec_link_ops);
3489notifier:
3490 unregister_netdevice_notifier(&macsec_notifier);
3491 return err;
3492}
3493
3494static void __exit macsec_exit(void)
3495{
3496 genl_unregister_family(&macsec_fam);
3497 rtnl_link_unregister(&macsec_link_ops);
3498 unregister_netdevice_notifier(&macsec_notifier);
b196c22a 3499 rcu_barrier();
c09440f7
SD		 3500}
3501
3502module_init(macsec_init);
3503module_exit(macsec_exit);
3504
3505MODULE_ALIAS_RTNL_LINK("macsec");
3506
3507MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3508MODULE_LICENSE("GPL v2");
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git