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[mirror_ubuntu-artful-kernel.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);
c09440f7
SD		 591 }
592}
593
594static void macsec_encrypt_done(struct crypto_async_request *base, int err)
595{
596 struct sk_buff *skb = base->data;
597 struct net_device *dev = skb->dev;
598 struct macsec_dev *macsec = macsec_priv(dev);
599 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
600 int len, ret;
601
602 aead_request_free(macsec_skb_cb(skb)->req);
603
604 rcu_read_lock_bh();
605 macsec_encrypt_finish(skb, dev);
606 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
607 len = skb->len;
608 ret = dev_queue_xmit(skb);
609 count_tx(dev, ret, len);
610 rcu_read_unlock_bh();
611
612 macsec_txsa_put(sa);
613 dev_put(dev);
614}
615
5d9649b3
SD		 616static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
617 unsigned char **iv,
5294b830
JD		 618 struct scatterlist **sg,
619 int num_frags)
5d9649b3
SD		 620{
621 size_t size, iv_offset, sg_offset;
622 struct aead_request *req;
623 void *tmp;
624
625 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
626 iv_offset = size;
627 size += GCM_AES_IV_LEN;
628
629 size = ALIGN(size, __alignof__(struct scatterlist));
630 sg_offset = size;
5294b830 631 size += sizeof(struct scatterlist) * num_frags;
5d9649b3
SD		 632
633 tmp = kmalloc(size, GFP_ATOMIC);
634 if (!tmp)
635 return NULL;
636
637 *iv = (unsigned char *)(tmp + iv_offset);
638 *sg = (struct scatterlist *)(tmp + sg_offset);
639 req = tmp;
640
641 aead_request_set_tfm(req, tfm);
642
643 return req;
644}
645
c09440f7
SD		 646static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
647 struct net_device *dev)
648{
649 int ret;
5d9649b3 650 struct scatterlist *sg;
5294b830 651 struct sk_buff *trailer;
5d9649b3 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
5294b830
JD		 726 ret = skb_cow_data(skb, 0, &trailer);
727 if (unlikely(ret < 0)) {
728 macsec_txsa_put(tx_sa);
729 kfree_skb(skb);
730 return ERR_PTR(ret);
731 }
732
733 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 734 if (!req) {
735 macsec_txsa_put(tx_sa);
736 kfree_skb(skb);
737 return ERR_PTR(-ENOMEM);
738 }
739
5d9649b3
SD		 740 macsec_fill_iv(iv, secy->sci, pn);
741
5294b830 742 sg_init_table(sg, ret);
c09440f7
SD		 743 skb_to_sgvec(skb, sg, 0, skb->len);
744
745 if (tx_sc->encrypt) {
e0f841f5 746 int len = skb->len - macsec_hdr_len(sci_present) -
c09440f7
SD		 747 secy->icv_len;
748 aead_request_set_crypt(req, sg, sg, len, iv);
e0f841f5 749 aead_request_set_ad(req, macsec_hdr_len(sci_present));
c09440f7
SD		 750 } else {
751 aead_request_set_crypt(req, sg, sg, 0, iv);
752 aead_request_set_ad(req, skb->len - secy->icv_len);
753 }
754
755 macsec_skb_cb(skb)->req = req;
756 macsec_skb_cb(skb)->tx_sa = tx_sa;
757 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
758
759 dev_hold(skb->dev);
760 ret = crypto_aead_encrypt(req);
761 if (ret == -EINPROGRESS) {
762 return ERR_PTR(ret);
763 } else if (ret != 0) {
764 dev_put(skb->dev);
765 kfree_skb(skb);
766 aead_request_free(req);
767 macsec_txsa_put(tx_sa);
768 return ERR_PTR(-EINVAL);
769 }
770
771 dev_put(skb->dev);
772 aead_request_free(req);
773 macsec_txsa_put(tx_sa);
774
775 return skb;
776}
777
778static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
779{
780 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
781 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
782 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
783 u32 lowest_pn = 0;
784
785 spin_lock(&rx_sa->lock);
786 if (rx_sa->next_pn >= secy->replay_window)
787 lowest_pn = rx_sa->next_pn - secy->replay_window;
788
789 /* Now perform replay protection check again
790 * (see IEEE 802.1AE-2006 figure 10-5)
791 */
792 if (secy->replay_protect && pn < lowest_pn) {
793 spin_unlock(&rx_sa->lock);
794 u64_stats_update_begin(&rxsc_stats->syncp);
795 rxsc_stats->stats.InPktsLate++;
796 u64_stats_update_end(&rxsc_stats->syncp);
797 return false;
798 }
799
800 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
801 u64_stats_update_begin(&rxsc_stats->syncp);
802 if (hdr->tci_an & MACSEC_TCI_E)
803 rxsc_stats->stats.InOctetsDecrypted += skb->len;
804 else
805 rxsc_stats->stats.InOctetsValidated += skb->len;
806 u64_stats_update_end(&rxsc_stats->syncp);
807 }
808
809 if (!macsec_skb_cb(skb)->valid) {
810 spin_unlock(&rx_sa->lock);
811
812 /* 10.6.5 */
813 if (hdr->tci_an & MACSEC_TCI_C ||
814 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
815 u64_stats_update_begin(&rxsc_stats->syncp);
816 rxsc_stats->stats.InPktsNotValid++;
817 u64_stats_update_end(&rxsc_stats->syncp);
818 return false;
819 }
820
821 u64_stats_update_begin(&rxsc_stats->syncp);
822 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
823 rxsc_stats->stats.InPktsInvalid++;
824 this_cpu_inc(rx_sa->stats->InPktsInvalid);
825 } else if (pn < lowest_pn) {
826 rxsc_stats->stats.InPktsDelayed++;
827 } else {
828 rxsc_stats->stats.InPktsUnchecked++;
829 }
830 u64_stats_update_end(&rxsc_stats->syncp);
831 } else {
832 u64_stats_update_begin(&rxsc_stats->syncp);
833 if (pn < lowest_pn) {
834 rxsc_stats->stats.InPktsDelayed++;
835 } else {
836 rxsc_stats->stats.InPktsOK++;
837 this_cpu_inc(rx_sa->stats->InPktsOK);
838 }
839 u64_stats_update_end(&rxsc_stats->syncp);
840
841 if (pn >= rx_sa->next_pn)
842 rx_sa->next_pn = pn + 1;
843 spin_unlock(&rx_sa->lock);
844 }
845
846 return true;
847}
848
849static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
850{
851 skb->pkt_type = PACKET_HOST;
852 skb->protocol = eth_type_trans(skb, dev);
853
854 skb_reset_network_header(skb);
855 if (!skb_transport_header_was_set(skb))
856 skb_reset_transport_header(skb);
857 skb_reset_mac_len(skb);
858}
859
860static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
861{
862 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
863 skb_pull(skb, hdr_len);
864 pskb_trim_unique(skb, skb->len - icv_len);
865}
866
867static void count_rx(struct net_device *dev, int len)
868{
869 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
870
871 u64_stats_update_begin(&stats->syncp);
872 stats->rx_packets++;
873 stats->rx_bytes += len;
874 u64_stats_update_end(&stats->syncp);
875}
876
877static void macsec_decrypt_done(struct crypto_async_request *base, int err)
878{
879 struct sk_buff *skb = base->data;
880 struct net_device *dev = skb->dev;
881 struct macsec_dev *macsec = macsec_priv(dev);
882 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
c78ebe1d 883 struct macsec_rx_sc *rx_sc = rx_sa->sc;
863483c9 884 int len;
c09440f7
SD		 885 u32 pn;
886
887 aead_request_free(macsec_skb_cb(skb)->req);
888
b3bdc3ac
LR		 889 if (!err)
890 macsec_skb_cb(skb)->valid = true;
891
c09440f7
SD		 892 rcu_read_lock_bh();
893 pn = ntohl(macsec_ethhdr(skb)->packet_number);
894 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
895 rcu_read_unlock_bh();
896 kfree_skb(skb);
897 goto out;
898 }
899
900 macsec_finalize_skb(skb, macsec->secy.icv_len,
901 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
902 macsec_reset_skb(skb, macsec->secy.netdev);
903
904 len = skb->len;
863483c9 905 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
c09440f7 906 count_rx(dev, len);
c09440f7
SD		 907
908 rcu_read_unlock_bh();
909
910out:
911 macsec_rxsa_put(rx_sa);
c78ebe1d 912 macsec_rxsc_put(rx_sc);
c09440f7 913 dev_put(dev);
c09440f7
SD		 914}
915
916static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
917 struct net_device *dev,
918 struct macsec_rx_sa *rx_sa,
919 sci_t sci,
920 struct macsec_secy *secy)
921{
922 int ret;
5d9649b3 923 struct scatterlist *sg;
5294b830 924 struct sk_buff *trailer;
5d9649b3 925 unsigned char *iv;
c09440f7
SD		 926 struct aead_request *req;
927 struct macsec_eth_header *hdr;
928 u16 icv_len = secy->icv_len;
929
930 macsec_skb_cb(skb)->valid = false;
931 skb = skb_share_check(skb, GFP_ATOMIC);
932 if (!skb)
c3b7d0bd 933 return ERR_PTR(-ENOMEM);
c09440f7 934
5294b830
JD		 935 ret = skb_cow_data(skb, 0, &trailer);
936 if (unlikely(ret < 0)) {
937 kfree_skb(skb);
938 return ERR_PTR(ret);
939 }
940 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 941 if (!req) {
942 kfree_skb(skb);
c3b7d0bd 943 return ERR_PTR(-ENOMEM);
c09440f7
SD		 944 }
945
946 hdr = (struct macsec_eth_header *)skb->data;
947 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
948
5294b830 949 sg_init_table(sg, ret);
c09440f7
SD		 950 skb_to_sgvec(skb, sg, 0, skb->len);
951
952 if (hdr->tci_an & MACSEC_TCI_E) {
953 /* confidentiality: ethernet + macsec header
954 * authenticated, encrypted payload
955 */
956 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
957
958 aead_request_set_crypt(req, sg, sg, len, iv);
959 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
960 skb = skb_unshare(skb, GFP_ATOMIC);
961 if (!skb) {
962 aead_request_free(req);
c3b7d0bd 963 return ERR_PTR(-ENOMEM);
c09440f7
SD		 964 }
965 } else {
966 /* integrity only: all headers + data authenticated */
967 aead_request_set_crypt(req, sg, sg, icv_len, iv);
968 aead_request_set_ad(req, skb->len - icv_len);
969 }
970
971 macsec_skb_cb(skb)->req = req;
c09440f7
SD		 972 skb->dev = dev;
973 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
974
975 dev_hold(dev);
976 ret = crypto_aead_decrypt(req);
977 if (ret == -EINPROGRESS) {
c3b7d0bd 978 return ERR_PTR(ret);
c09440f7
SD		 979 } else if (ret != 0) {
980 /* decryption/authentication failed
981 * 10.6 if validateFrames is disabled, deliver anyway
982 */
983 if (ret != -EBADMSG) {
984 kfree_skb(skb);
c3b7d0bd 985 skb = ERR_PTR(ret);
c09440f7
SD		 986 }
987 } else {
988 macsec_skb_cb(skb)->valid = true;
989 }
990 dev_put(dev);
991
992 aead_request_free(req);
993
994 return skb;
995}
996
997static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
998{
999 struct macsec_rx_sc *rx_sc;
1000
1001 for_each_rxsc(secy, rx_sc) {
1002 if (rx_sc->sci == sci)
1003 return rx_sc;
1004 }
1005
1006 return NULL;
1007}
1008
1009static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
1010{
1011 struct macsec_rx_sc *rx_sc;
1012
1013 for_each_rxsc_rtnl(secy, rx_sc) {
1014 if (rx_sc->sci == sci)
1015 return rx_sc;
1016 }
1017
1018 return NULL;
1019}
1020
1021static void handle_not_macsec(struct sk_buff *skb)
1022{
1023 struct macsec_rxh_data *rxd;
1024 struct macsec_dev *macsec;
1025
1026 rcu_read_lock();
1027 rxd = macsec_data_rcu(skb->dev);
1028
1029 /* 10.6 If the management control validateFrames is not
1030 * Strict, frames without a SecTAG are received, counted, and
1031 * delivered to the Controlled Port
1032 */
1033 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1034 struct sk_buff *nskb;
c09440f7
SD		 1035 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1036
1037 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1038 u64_stats_update_begin(&secy_stats->syncp);
1039 secy_stats->stats.InPktsNoTag++;
1040 u64_stats_update_end(&secy_stats->syncp);
1041 continue;
1042 }
1043
1044 /* deliver on this port */
1045 nskb = skb_clone(skb, GFP_ATOMIC);
1046 if (!nskb)
1047 break;
1048
1049 nskb->dev = macsec->secy.netdev;
1050
863483c9 1051 if (netif_rx(nskb) == NET_RX_SUCCESS) {
c09440f7
SD		 1052 u64_stats_update_begin(&secy_stats->syncp);
1053 secy_stats->stats.InPktsUntagged++;
1054 u64_stats_update_end(&secy_stats->syncp);
c09440f7
SD		 1055 }
1056 }
1057
1058 rcu_read_unlock();
1059}
1060
1061static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1062{
1063 struct sk_buff *skb = *pskb;
1064 struct net_device *dev = skb->dev;
1065 struct macsec_eth_header *hdr;
1066 struct macsec_secy *secy = NULL;
1067 struct macsec_rx_sc *rx_sc;
1068 struct macsec_rx_sa *rx_sa;
1069 struct macsec_rxh_data *rxd;
1070 struct macsec_dev *macsec;
1071 sci_t sci;
1072 u32 pn;
1073 bool cbit;
1074 struct pcpu_rx_sc_stats *rxsc_stats;
1075 struct pcpu_secy_stats *secy_stats;
1076 bool pulled_sci;
5491e7c6 1077 int ret;
c09440f7
SD		 1078
1079 if (skb_headroom(skb) < ETH_HLEN)
1080 goto drop_direct;
1081
1082 hdr = macsec_ethhdr(skb);
1083 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1084 handle_not_macsec(skb);
1085
1086 /* and deliver to the uncontrolled port */
1087 return RX_HANDLER_PASS;
1088 }
1089
1090 skb = skb_unshare(skb, GFP_ATOMIC);
1091 if (!skb) {
1092 *pskb = NULL;
1093 return RX_HANDLER_CONSUMED;
1094 }
1095
1096 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1097 if (!pulled_sci) {
1098 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1099 goto drop_direct;
1100 }
1101
1102 hdr = macsec_ethhdr(skb);
1103
1104 /* Frames with a SecTAG that has the TCI E bit set but the C
1105 * bit clear are discarded, as this reserved encoding is used
1106 * to identify frames with a SecTAG that are not to be
1107 * delivered to the Controlled Port.
1108 */
1109 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1110 return RX_HANDLER_PASS;
1111
1112 /* now, pull the extra length */
1113 if (hdr->tci_an & MACSEC_TCI_SC) {
1114 if (!pulled_sci)
1115 goto drop_direct;
1116 }
1117
1118 /* ethernet header is part of crypto processing */
1119 skb_push(skb, ETH_HLEN);
1120
1121 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1122 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1123 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1124
1125 rcu_read_lock();
1126 rxd = macsec_data_rcu(skb->dev);
1127
1128 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1129 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
c78ebe1d 1130 sc = sc ? macsec_rxsc_get(sc) : NULL;
c09440f7
SD		 1131
1132 if (sc) {
1133 secy = &macsec->secy;
1134 rx_sc = sc;
1135 break;
1136 }
1137 }
1138
1139 if (!secy)
1140 goto nosci;
1141
1142 dev = secy->netdev;
1143 macsec = macsec_priv(dev);
1144 secy_stats = this_cpu_ptr(macsec->stats);
1145 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1146
1147 if (!macsec_validate_skb(skb, secy->icv_len)) {
1148 u64_stats_update_begin(&secy_stats->syncp);
1149 secy_stats->stats.InPktsBadTag++;
1150 u64_stats_update_end(&secy_stats->syncp);
1151 goto drop_nosa;
1152 }
1153
1154 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1155 if (!rx_sa) {
1156 /* 10.6.1 if the SA is not in use */
1157
1158 /* If validateFrames is Strict or the C bit in the
1159 * SecTAG is set, discard
1160 */
1161 if (hdr->tci_an & MACSEC_TCI_C ||
1162 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1163 u64_stats_update_begin(&rxsc_stats->syncp);
1164 rxsc_stats->stats.InPktsNotUsingSA++;
1165 u64_stats_update_end(&rxsc_stats->syncp);
1166 goto drop_nosa;
1167 }
1168
1169 /* not Strict, the frame (with the SecTAG and ICV
1170 * removed) is delivered to the Controlled Port.
1171 */
1172 u64_stats_update_begin(&rxsc_stats->syncp);
1173 rxsc_stats->stats.InPktsUnusedSA++;
1174 u64_stats_update_end(&rxsc_stats->syncp);
1175 goto deliver;
1176 }
1177
1178 /* First, PN check to avoid decrypting obviously wrong packets */
1179 pn = ntohl(hdr->packet_number);
1180 if (secy->replay_protect) {
1181 bool late;
1182
1183 spin_lock(&rx_sa->lock);
1184 late = rx_sa->next_pn >= secy->replay_window &&
1185 pn < (rx_sa->next_pn - secy->replay_window);
1186 spin_unlock(&rx_sa->lock);
1187
1188 if (late) {
1189 u64_stats_update_begin(&rxsc_stats->syncp);
1190 rxsc_stats->stats.InPktsLate++;
1191 u64_stats_update_end(&rxsc_stats->syncp);
1192 goto drop;
1193 }
1194 }
1195
e3a3b626
BG		 1196 macsec_skb_cb(skb)->rx_sa = rx_sa;
1197
c09440f7
SD		 1198 /* Disabled && !changed text => skip validation */
1199 if (hdr->tci_an & MACSEC_TCI_C ||
1200 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1201 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1202
c3b7d0bd
SD		 1203 if (IS_ERR(skb)) {
1204 /* the decrypt callback needs the reference */
c78ebe1d 1205 if (PTR_ERR(skb) != -EINPROGRESS) {
c3b7d0bd 1206 macsec_rxsa_put(rx_sa);
c78ebe1d
SD		 1207 macsec_rxsc_put(rx_sc);
1208 }
c09440f7
SD		 1209 rcu_read_unlock();
1210 *pskb = NULL;
1211 return RX_HANDLER_CONSUMED;
1212 }
1213
1214 if (!macsec_post_decrypt(skb, secy, pn))
1215 goto drop;
1216
1217deliver:
1218 macsec_finalize_skb(skb, secy->icv_len,
1219 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1220 macsec_reset_skb(skb, secy->netdev);
1221
497f358a
SD		 1222 if (rx_sa)
1223 macsec_rxsa_put(rx_sa);
c78ebe1d 1224 macsec_rxsc_put(rx_sc);
5491e7c6
PA		 1225
1226 ret = gro_cells_receive(&macsec->gro_cells, skb);
1227 if (ret == NET_RX_SUCCESS)
1228 count_rx(dev, skb->len);
1229 else
1230 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1231
1232 rcu_read_unlock();
1233
5491e7c6
PA		 1234 *pskb = NULL;
1235 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1236
1237drop:
1238 macsec_rxsa_put(rx_sa);
1239drop_nosa:
c78ebe1d 1240 macsec_rxsc_put(rx_sc);
c09440f7
SD		 1241 rcu_read_unlock();
1242drop_direct:
1243 kfree_skb(skb);
1244 *pskb = NULL;
1245 return RX_HANDLER_CONSUMED;
1246
1247nosci:
1248 /* 10.6.1 if the SC is not found */
1249 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1250 if (!cbit)
1251 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1252 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1253
1254 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1255 struct sk_buff *nskb;
c09440f7
SD		 1256
1257 secy_stats = this_cpu_ptr(macsec->stats);
1258
1259 /* If validateFrames is Strict or the C bit in the
1260 * SecTAG is set, discard
1261 */
1262 if (cbit ||
1263 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1264 u64_stats_update_begin(&secy_stats->syncp);
1265 secy_stats->stats.InPktsNoSCI++;
1266 u64_stats_update_end(&secy_stats->syncp);
1267 continue;
1268 }
1269
1270 /* not strict, the frame (with the SecTAG and ICV
1271 * removed) is delivered to the Controlled Port.
1272 */
1273 nskb = skb_clone(skb, GFP_ATOMIC);
1274 if (!nskb)
1275 break;
1276
1277 macsec_reset_skb(nskb, macsec->secy.netdev);
1278
1279 ret = netif_rx(nskb);
1280 if (ret == NET_RX_SUCCESS) {
1281 u64_stats_update_begin(&secy_stats->syncp);
1282 secy_stats->stats.InPktsUnknownSCI++;
1283 u64_stats_update_end(&secy_stats->syncp);
1284 } else {
1285 macsec->secy.netdev->stats.rx_dropped++;
1286 }
1287 }
1288
1289 rcu_read_unlock();
1290 *pskb = skb;
1291 return RX_HANDLER_PASS;
1292}
1293
1294static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1295{
1296 struct crypto_aead *tfm;
1297 int ret;
1298
6052f7fb 1299 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
34aedfee
DC		 1300
1301 if (IS_ERR(tfm))
1302 return tfm;
c09440f7
SD		 1303
1304 ret = crypto_aead_setkey(tfm, key, key_len);
34aedfee
DC		 1305 if (ret < 0)
1306 goto fail;
c09440f7
SD		 1307
1308 ret = crypto_aead_setauthsize(tfm, icv_len);
34aedfee
DC		 1309 if (ret < 0)
1310 goto fail;
c09440f7
SD		 1311
1312 return tfm;
34aedfee
DC		 1313fail:
1314 crypto_free_aead(tfm);
1315 return ERR_PTR(ret);
c09440f7
SD		 1316}
1317
1318static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1319 int icv_len)
1320{
1321 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1322 if (!rx_sa->stats)
34aedfee 1323 return -ENOMEM;
c09440f7
SD		 1324
1325 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1326 if (IS_ERR(rx_sa->key.tfm)) {
c09440f7 1327 free_percpu(rx_sa->stats);
34aedfee 1328 return PTR_ERR(rx_sa->key.tfm);
c09440f7
SD		 1329 }
1330
1331 rx_sa->active = false;
1332 rx_sa->next_pn = 1;
1333 atomic_set(&rx_sa->refcnt, 1);
1334 spin_lock_init(&rx_sa->lock);
1335
1336 return 0;
1337}
1338
1339static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1340{
1341 rx_sa->active = false;
1342
1343 macsec_rxsa_put(rx_sa);
1344}
1345
1346static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1347{
1348 int i;
1349
1350 for (i = 0; i < MACSEC_NUM_AN; i++) {
1351 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1352
1353 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1354 if (sa)
1355 clear_rx_sa(sa);
1356 }
1357
1358 macsec_rxsc_put(rx_sc);
1359}
1360
1361static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1362{
1363 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1364
1365 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1366 rx_sc;
1367 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1368 if (rx_sc->sci == sci) {
1369 if (rx_sc->active)
1370 secy->n_rx_sc--;
1371 rcu_assign_pointer(*rx_scp, rx_sc->next);
1372 return rx_sc;
1373 }
1374 }
1375
1376 return NULL;
1377}
1378
1379static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1380{
1381 struct macsec_rx_sc *rx_sc;
1382 struct macsec_dev *macsec;
1383 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1384 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1385 struct macsec_secy *secy;
1386
1387 list_for_each_entry(macsec, &rxd->secys, secys) {
1388 if (find_rx_sc_rtnl(&macsec->secy, sci))
1389 return ERR_PTR(-EEXIST);
1390 }
1391
1392 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1393 if (!rx_sc)
1394 return ERR_PTR(-ENOMEM);
1395
1396 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1397 if (!rx_sc->stats) {
1398 kfree(rx_sc);
1399 return ERR_PTR(-ENOMEM);
1400 }
1401
1402 rx_sc->sci = sci;
1403 rx_sc->active = true;
1404 atomic_set(&rx_sc->refcnt, 1);
1405
1406 secy = &macsec_priv(dev)->secy;
1407 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1408 rcu_assign_pointer(secy->rx_sc, rx_sc);
1409
1410 if (rx_sc->active)
1411 secy->n_rx_sc++;
1412
1413 return rx_sc;
1414}
1415
1416static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1417 int icv_len)
1418{
1419 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1420 if (!tx_sa->stats)
34aedfee 1421 return -ENOMEM;
c09440f7
SD		 1422
1423 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1424 if (IS_ERR(tx_sa->key.tfm)) {
c09440f7 1425 free_percpu(tx_sa->stats);
34aedfee 1426 return PTR_ERR(tx_sa->key.tfm);
c09440f7
SD		 1427 }
1428
1429 tx_sa->active = false;
1430 atomic_set(&tx_sa->refcnt, 1);
1431 spin_lock_init(&tx_sa->lock);
1432
1433 return 0;
1434}
1435
1436static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1437{
1438 tx_sa->active = false;
1439
1440 macsec_txsa_put(tx_sa);
1441}
1442
489111e5 1443static struct genl_family macsec_fam;
c09440f7
SD		 1444
1445static struct net_device *get_dev_from_nl(struct net *net,
1446 struct nlattr **attrs)
1447{
1448 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1449 struct net_device *dev;
1450
1451 dev = __dev_get_by_index(net, ifindex);
1452 if (!dev)
1453 return ERR_PTR(-ENODEV);
1454
1455 if (!netif_is_macsec(dev))
1456 return ERR_PTR(-ENODEV);
1457
1458 return dev;
1459}
1460
1461static sci_t nla_get_sci(const struct nlattr *nla)
1462{
1463 return (__force sci_t)nla_get_u64(nla);
1464}
1465
f60d94c0
ND		 1466static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1467 int padattr)
c09440f7 1468{
f60d94c0 1469 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
c09440f7
SD		 1470}
1471
1472static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1473 struct nlattr **attrs,
1474 struct nlattr **tb_sa,
1475 struct net_device **devp,
1476 struct macsec_secy **secyp,
1477 struct macsec_tx_sc **scp,
1478 u8 *assoc_num)
1479{
1480 struct net_device *dev;
1481 struct macsec_secy *secy;
1482 struct macsec_tx_sc *tx_sc;
1483 struct macsec_tx_sa *tx_sa;
1484
1485 if (!tb_sa[MACSEC_SA_ATTR_AN])
1486 return ERR_PTR(-EINVAL);
1487
1488 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1489
1490 dev = get_dev_from_nl(net, attrs);
1491 if (IS_ERR(dev))
1492 return ERR_CAST(dev);
1493
1494 if (*assoc_num >= MACSEC_NUM_AN)
1495 return ERR_PTR(-EINVAL);
1496
1497 secy = &macsec_priv(dev)->secy;
1498 tx_sc = &secy->tx_sc;
1499
1500 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1501 if (!tx_sa)
1502 return ERR_PTR(-ENODEV);
1503
1504 *devp = dev;
1505 *scp = tx_sc;
1506 *secyp = secy;
1507 return tx_sa;
1508}
1509
1510static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1511 struct nlattr **attrs,
1512 struct nlattr **tb_rxsc,
1513 struct net_device **devp,
1514 struct macsec_secy **secyp)
1515{
1516 struct net_device *dev;
1517 struct macsec_secy *secy;
1518 struct macsec_rx_sc *rx_sc;
1519 sci_t sci;
1520
1521 dev = get_dev_from_nl(net, attrs);
1522 if (IS_ERR(dev))
1523 return ERR_CAST(dev);
1524
1525 secy = &macsec_priv(dev)->secy;
1526
1527 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1528 return ERR_PTR(-EINVAL);
1529
1530 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1531 rx_sc = find_rx_sc_rtnl(secy, sci);
1532 if (!rx_sc)
1533 return ERR_PTR(-ENODEV);
1534
1535 *secyp = secy;
1536 *devp = dev;
1537
1538 return rx_sc;
1539}
1540
1541static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1542 struct nlattr **attrs,
1543 struct nlattr **tb_rxsc,
1544 struct nlattr **tb_sa,
1545 struct net_device **devp,
1546 struct macsec_secy **secyp,
1547 struct macsec_rx_sc **scp,
1548 u8 *assoc_num)
1549{
1550 struct macsec_rx_sc *rx_sc;
1551 struct macsec_rx_sa *rx_sa;
1552
1553 if (!tb_sa[MACSEC_SA_ATTR_AN])
1554 return ERR_PTR(-EINVAL);
1555
1556 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1557 if (*assoc_num >= MACSEC_NUM_AN)
1558 return ERR_PTR(-EINVAL);
1559
1560 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1561 if (IS_ERR(rx_sc))
1562 return ERR_CAST(rx_sc);
1563
1564 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1565 if (!rx_sa)
1566 return ERR_PTR(-ENODEV);
1567
1568 *scp = rx_sc;
1569 return rx_sa;
1570}
1571
1572
1573static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1574 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1575 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1576 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1577};
1578
1579static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1580 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1581 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1582};
1583
1584static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1585 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1586 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1587 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
8acca6ac
SD		 1588 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1589 .len = MACSEC_KEYID_LEN, },
c09440f7
SD		 1590 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1591 .len = MACSEC_MAX_KEY_LEN, },
1592};
1593
1594static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1595{
1596 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1597 return -EINVAL;
1598
fceb6435
JB		 1599 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX,
1600 attrs[MACSEC_ATTR_SA_CONFIG],
1601 macsec_genl_sa_policy, NULL))
c09440f7
SD		 1602 return -EINVAL;
1603
1604 return 0;
1605}
1606
1607static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1608{
1609 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1610 return -EINVAL;
1611
fceb6435
JB		 1612 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX,
1613 attrs[MACSEC_ATTR_RXSC_CONFIG],
1614 macsec_genl_rxsc_policy, NULL))
c09440f7
SD		 1615 return -EINVAL;
1616
1617 return 0;
1618}
1619
1620static bool validate_add_rxsa(struct nlattr **attrs)
1621{
1622 if (!attrs[MACSEC_SA_ATTR_AN] ||
1623 !attrs[MACSEC_SA_ATTR_KEY] ||
1624 !attrs[MACSEC_SA_ATTR_KEYID])
1625 return false;
1626
1627 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1628 return false;
1629
1630 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1631 return false;
1632
1633 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1634 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1635 return false;
1636 }
1637
8acca6ac
SD		 1638 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1639 return false;
1640
c09440f7
SD		 1641 return true;
1642}
1643
1644static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1645{
1646 struct net_device *dev;
1647 struct nlattr **attrs = info->attrs;
1648 struct macsec_secy *secy;
1649 struct macsec_rx_sc *rx_sc;
1650 struct macsec_rx_sa *rx_sa;
1651 unsigned char assoc_num;
1652 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1653 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1654 int err;
c09440f7
SD		 1655
1656 if (!attrs[MACSEC_ATTR_IFINDEX])
1657 return -EINVAL;
1658
1659 if (parse_sa_config(attrs, tb_sa))
1660 return -EINVAL;
1661
1662 if (parse_rxsc_config(attrs, tb_rxsc))
1663 return -EINVAL;
1664
1665 if (!validate_add_rxsa(tb_sa))
1666 return -EINVAL;
1667
1668 rtnl_lock();
1669 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
36b232c8 1670 if (IS_ERR(rx_sc)) {
c09440f7
SD		 1671 rtnl_unlock();
1672 return PTR_ERR(rx_sc);
1673 }
1674
1675 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1676
1677 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1678 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1679 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1680 rtnl_unlock();
1681 return -EINVAL;
1682 }
1683
1684 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1685 if (rx_sa) {
1686 rtnl_unlock();
1687 return -EBUSY;
1688 }
1689
1690 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
34aedfee 1691 if (!rx_sa) {
c09440f7
SD		 1692 rtnl_unlock();
1693 return -ENOMEM;
1694 }
1695
34aedfee
DC		 1696 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1697 secy->key_len, secy->icv_len);
1698 if (err < 0) {
1699 kfree(rx_sa);
1700 rtnl_unlock();
1701 return err;
1702 }
1703
c09440f7
SD		 1704 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1705 spin_lock_bh(&rx_sa->lock);
1706 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1707 spin_unlock_bh(&rx_sa->lock);
1708 }
1709
1710 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1711 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1712
1968a0b8 1713 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1714 rx_sa->sc = rx_sc;
1715 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1716
1717 rtnl_unlock();
1718
1719 return 0;
1720}
1721
1722static bool validate_add_rxsc(struct nlattr **attrs)
1723{
1724 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1725 return false;
1726
1727 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1728 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1729 return false;
1730 }
1731
1732 return true;
1733}
1734
1735static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1736{
1737 struct net_device *dev;
1738 sci_t sci = MACSEC_UNDEF_SCI;
1739 struct nlattr **attrs = info->attrs;
1740 struct macsec_rx_sc *rx_sc;
1741 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1742
1743 if (!attrs[MACSEC_ATTR_IFINDEX])
1744 return -EINVAL;
1745
1746 if (parse_rxsc_config(attrs, tb_rxsc))
1747 return -EINVAL;
1748
1749 if (!validate_add_rxsc(tb_rxsc))
1750 return -EINVAL;
1751
1752 rtnl_lock();
1753 dev = get_dev_from_nl(genl_info_net(info), attrs);
1754 if (IS_ERR(dev)) {
1755 rtnl_unlock();
1756 return PTR_ERR(dev);
1757 }
1758
1759 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1760
1761 rx_sc = create_rx_sc(dev, sci);
1762 if (IS_ERR(rx_sc)) {
1763 rtnl_unlock();
1764 return PTR_ERR(rx_sc);
1765 }
1766
1767 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1768 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1769
1770 rtnl_unlock();
1771
1772 return 0;
1773}
1774
1775static bool validate_add_txsa(struct nlattr **attrs)
1776{
1777 if (!attrs[MACSEC_SA_ATTR_AN] ||
1778 !attrs[MACSEC_SA_ATTR_PN] ||
1779 !attrs[MACSEC_SA_ATTR_KEY] ||
1780 !attrs[MACSEC_SA_ATTR_KEYID])
1781 return false;
1782
1783 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1784 return false;
1785
1786 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1787 return false;
1788
1789 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1790 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1791 return false;
1792 }
1793
8acca6ac
SD		 1794 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1795 return false;
1796
c09440f7
SD		 1797 return true;
1798}
1799
1800static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1801{
1802 struct net_device *dev;
1803 struct nlattr **attrs = info->attrs;
1804 struct macsec_secy *secy;
1805 struct macsec_tx_sc *tx_sc;
1806 struct macsec_tx_sa *tx_sa;
1807 unsigned char assoc_num;
1808 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1809 int err;
c09440f7
SD		 1810
1811 if (!attrs[MACSEC_ATTR_IFINDEX])
1812 return -EINVAL;
1813
1814 if (parse_sa_config(attrs, tb_sa))
1815 return -EINVAL;
1816
1817 if (!validate_add_txsa(tb_sa))
1818 return -EINVAL;
1819
1820 rtnl_lock();
1821 dev = get_dev_from_nl(genl_info_net(info), attrs);
1822 if (IS_ERR(dev)) {
1823 rtnl_unlock();
1824 return PTR_ERR(dev);
1825 }
1826
1827 secy = &macsec_priv(dev)->secy;
1828 tx_sc = &secy->tx_sc;
1829
1830 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1831
1832 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1833 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1834 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1835 rtnl_unlock();
1836 return -EINVAL;
1837 }
1838
1839 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1840 if (tx_sa) {
1841 rtnl_unlock();
1842 return -EBUSY;
1843 }
1844
1845 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
34aedfee 1846 if (!tx_sa) {
c09440f7
SD		 1847 rtnl_unlock();
1848 return -ENOMEM;
1849 }
1850
34aedfee
DC		 1851 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1852 secy->key_len, secy->icv_len);
1853 if (err < 0) {
1854 kfree(tx_sa);
1855 rtnl_unlock();
1856 return err;
1857 }
1858
1968a0b8 1859 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1860
1861 spin_lock_bh(&tx_sa->lock);
1862 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1863 spin_unlock_bh(&tx_sa->lock);
1864
1865 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1866 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1867
1868 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1869 secy->operational = true;
1870
1871 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1872
1873 rtnl_unlock();
1874
1875 return 0;
1876}
1877
1878static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1879{
1880 struct nlattr **attrs = info->attrs;
1881 struct net_device *dev;
1882 struct macsec_secy *secy;
1883 struct macsec_rx_sc *rx_sc;
1884 struct macsec_rx_sa *rx_sa;
1885 u8 assoc_num;
1886 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1887 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1888
1889 if (!attrs[MACSEC_ATTR_IFINDEX])
1890 return -EINVAL;
1891
1892 if (parse_sa_config(attrs, tb_sa))
1893 return -EINVAL;
1894
1895 if (parse_rxsc_config(attrs, tb_rxsc))
1896 return -EINVAL;
1897
1898 rtnl_lock();
1899 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1900 &dev, &secy, &rx_sc, &assoc_num);
1901 if (IS_ERR(rx_sa)) {
1902 rtnl_unlock();
1903 return PTR_ERR(rx_sa);
1904 }
1905
1906 if (rx_sa->active) {
1907 rtnl_unlock();
1908 return -EBUSY;
1909 }
1910
1911 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1912 clear_rx_sa(rx_sa);
1913
1914 rtnl_unlock();
1915
1916 return 0;
1917}
1918
1919static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1920{
1921 struct nlattr **attrs = info->attrs;
1922 struct net_device *dev;
1923 struct macsec_secy *secy;
1924 struct macsec_rx_sc *rx_sc;
1925 sci_t sci;
1926 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1927
1928 if (!attrs[MACSEC_ATTR_IFINDEX])
1929 return -EINVAL;
1930
1931 if (parse_rxsc_config(attrs, tb_rxsc))
1932 return -EINVAL;
1933
1934 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1935 return -EINVAL;
1936
1937 rtnl_lock();
1938 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1939 if (IS_ERR(dev)) {
1940 rtnl_unlock();
1941 return PTR_ERR(dev);
1942 }
1943
1944 secy = &macsec_priv(dev)->secy;
1945 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1946
1947 rx_sc = del_rx_sc(secy, sci);
1948 if (!rx_sc) {
1949 rtnl_unlock();
1950 return -ENODEV;
1951 }
1952
1953 free_rx_sc(rx_sc);
1954 rtnl_unlock();
1955
1956 return 0;
1957}
1958
1959static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1960{
1961 struct nlattr **attrs = info->attrs;
1962 struct net_device *dev;
1963 struct macsec_secy *secy;
1964 struct macsec_tx_sc *tx_sc;
1965 struct macsec_tx_sa *tx_sa;
1966 u8 assoc_num;
1967 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1968
1969 if (!attrs[MACSEC_ATTR_IFINDEX])
1970 return -EINVAL;
1971
1972 if (parse_sa_config(attrs, tb_sa))
1973 return -EINVAL;
1974
1975 rtnl_lock();
1976 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1977 &dev, &secy, &tx_sc, &assoc_num);
1978 if (IS_ERR(tx_sa)) {
1979 rtnl_unlock();
1980 return PTR_ERR(tx_sa);
1981 }
1982
1983 if (tx_sa->active) {
1984 rtnl_unlock();
1985 return -EBUSY;
1986 }
1987
1988 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
1989 clear_tx_sa(tx_sa);
1990
1991 rtnl_unlock();
1992
1993 return 0;
1994}
1995
1996static bool validate_upd_sa(struct nlattr **attrs)
1997{
1998 if (!attrs[MACSEC_SA_ATTR_AN] ||
1999 attrs[MACSEC_SA_ATTR_KEY] ||
2000 attrs[MACSEC_SA_ATTR_KEYID])
2001 return false;
2002
2003 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2004 return false;
2005
2006 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2007 return false;
2008
2009 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2010 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2011 return false;
2012 }
2013
2014 return true;
2015}
2016
2017static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2018{
2019 struct nlattr **attrs = info->attrs;
2020 struct net_device *dev;
2021 struct macsec_secy *secy;
2022 struct macsec_tx_sc *tx_sc;
2023 struct macsec_tx_sa *tx_sa;
2024 u8 assoc_num;
2025 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2026
2027 if (!attrs[MACSEC_ATTR_IFINDEX])
2028 return -EINVAL;
2029
2030 if (parse_sa_config(attrs, tb_sa))
2031 return -EINVAL;
2032
2033 if (!validate_upd_sa(tb_sa))
2034 return -EINVAL;
2035
2036 rtnl_lock();
2037 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2038 &dev, &secy, &tx_sc, &assoc_num);
2039 if (IS_ERR(tx_sa)) {
2040 rtnl_unlock();
2041 return PTR_ERR(tx_sa);
2042 }
2043
2044 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2045 spin_lock_bh(&tx_sa->lock);
2046 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2047 spin_unlock_bh(&tx_sa->lock);
2048 }
2049
2050 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2051 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2052
2053 if (assoc_num == tx_sc->encoding_sa)
2054 secy->operational = tx_sa->active;
2055
2056 rtnl_unlock();
2057
2058 return 0;
2059}
2060
2061static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2062{
2063 struct nlattr **attrs = info->attrs;
2064 struct net_device *dev;
2065 struct macsec_secy *secy;
2066 struct macsec_rx_sc *rx_sc;
2067 struct macsec_rx_sa *rx_sa;
2068 u8 assoc_num;
2069 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2070 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2071
2072 if (!attrs[MACSEC_ATTR_IFINDEX])
2073 return -EINVAL;
2074
2075 if (parse_rxsc_config(attrs, tb_rxsc))
2076 return -EINVAL;
2077
2078 if (parse_sa_config(attrs, tb_sa))
2079 return -EINVAL;
2080
2081 if (!validate_upd_sa(tb_sa))
2082 return -EINVAL;
2083
2084 rtnl_lock();
2085 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2086 &dev, &secy, &rx_sc, &assoc_num);
2087 if (IS_ERR(rx_sa)) {
2088 rtnl_unlock();
2089 return PTR_ERR(rx_sa);
2090 }
2091
2092 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2093 spin_lock_bh(&rx_sa->lock);
2094 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2095 spin_unlock_bh(&rx_sa->lock);
2096 }
2097
2098 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2099 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2100
2101 rtnl_unlock();
2102 return 0;
2103}
2104
2105static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2106{
2107 struct nlattr **attrs = info->attrs;
2108 struct net_device *dev;
2109 struct macsec_secy *secy;
2110 struct macsec_rx_sc *rx_sc;
2111 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2112
2113 if (!attrs[MACSEC_ATTR_IFINDEX])
2114 return -EINVAL;
2115
2116 if (parse_rxsc_config(attrs, tb_rxsc))
2117 return -EINVAL;
2118
2119 if (!validate_add_rxsc(tb_rxsc))
2120 return -EINVAL;
2121
2122 rtnl_lock();
2123 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2124 if (IS_ERR(rx_sc)) {
2125 rtnl_unlock();
2126 return PTR_ERR(rx_sc);
2127 }
2128
2129 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2130 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2131
2132 if (rx_sc->active != new)
2133 secy->n_rx_sc += new ? 1 : -1;
2134
2135 rx_sc->active = new;
2136 }
2137
2138 rtnl_unlock();
2139
2140 return 0;
2141}
2142
2143static int copy_tx_sa_stats(struct sk_buff *skb,
2144 struct macsec_tx_sa_stats __percpu *pstats)
2145{
2146 struct macsec_tx_sa_stats sum = {0, };
2147 int cpu;
2148
2149 for_each_possible_cpu(cpu) {
2150 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2151
2152 sum.OutPktsProtected += stats->OutPktsProtected;
2153 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2154 }
2155
2156 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2157 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2158 return -EMSGSIZE;
2159
2160 return 0;
2161}
2162
2163static int copy_rx_sa_stats(struct sk_buff *skb,
2164 struct macsec_rx_sa_stats __percpu *pstats)
2165{
2166 struct macsec_rx_sa_stats sum = {0, };
2167 int cpu;
2168
2169 for_each_possible_cpu(cpu) {
2170 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2171
2172 sum.InPktsOK += stats->InPktsOK;
2173 sum.InPktsInvalid += stats->InPktsInvalid;
2174 sum.InPktsNotValid += stats->InPktsNotValid;
2175 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2176 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2177 }
2178
2179 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2180 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2181 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2182 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2183 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2184 return -EMSGSIZE;
2185
2186 return 0;
2187}
2188
2189static int copy_rx_sc_stats(struct sk_buff *skb,
2190 struct pcpu_rx_sc_stats __percpu *pstats)
2191{
2192 struct macsec_rx_sc_stats sum = {0, };
2193 int cpu;
2194
2195 for_each_possible_cpu(cpu) {
2196 const struct pcpu_rx_sc_stats *stats;
2197 struct macsec_rx_sc_stats tmp;
2198 unsigned int start;
2199
2200 stats = per_cpu_ptr(pstats, cpu);
2201 do {
2202 start = u64_stats_fetch_begin_irq(&stats->syncp);
2203 memcpy(&tmp, &stats->stats, sizeof(tmp));
2204 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2205
2206 sum.InOctetsValidated += tmp.InOctetsValidated;
2207 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2208 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2209 sum.InPktsDelayed += tmp.InPktsDelayed;
2210 sum.InPktsOK += tmp.InPktsOK;
2211 sum.InPktsInvalid += tmp.InPktsInvalid;
2212 sum.InPktsLate += tmp.InPktsLate;
2213 sum.InPktsNotValid += tmp.InPktsNotValid;
2214 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2215 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2216 }
2217
f60d94c0
ND		 2218 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2219 sum.InOctetsValidated,
2220 MACSEC_RXSC_STATS_ATTR_PAD) ||
2221 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2222 sum.InOctetsDecrypted,
2223 MACSEC_RXSC_STATS_ATTR_PAD) ||
2224 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2225 sum.InPktsUnchecked,
2226 MACSEC_RXSC_STATS_ATTR_PAD) ||
2227 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2228 sum.InPktsDelayed,
2229 MACSEC_RXSC_STATS_ATTR_PAD) ||
2230 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2231 sum.InPktsOK,
2232 MACSEC_RXSC_STATS_ATTR_PAD) ||
2233 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2234 sum.InPktsInvalid,
2235 MACSEC_RXSC_STATS_ATTR_PAD) ||
2236 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2237 sum.InPktsLate,
2238 MACSEC_RXSC_STATS_ATTR_PAD) ||
2239 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2240 sum.InPktsNotValid,
2241 MACSEC_RXSC_STATS_ATTR_PAD) ||
2242 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2243 sum.InPktsNotUsingSA,
2244 MACSEC_RXSC_STATS_ATTR_PAD) ||
2245 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2246 sum.InPktsUnusedSA,
2247 MACSEC_RXSC_STATS_ATTR_PAD))
c09440f7
SD		 2248 return -EMSGSIZE;
2249
2250 return 0;
2251}
2252
2253static int copy_tx_sc_stats(struct sk_buff *skb,
2254 struct pcpu_tx_sc_stats __percpu *pstats)
2255{
2256 struct macsec_tx_sc_stats sum = {0, };
2257 int cpu;
2258
2259 for_each_possible_cpu(cpu) {
2260 const struct pcpu_tx_sc_stats *stats;
2261 struct macsec_tx_sc_stats tmp;
2262 unsigned int start;
2263
2264 stats = per_cpu_ptr(pstats, cpu);
2265 do {
2266 start = u64_stats_fetch_begin_irq(&stats->syncp);
2267 memcpy(&tmp, &stats->stats, sizeof(tmp));
2268 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2269
2270 sum.OutPktsProtected += tmp.OutPktsProtected;
2271 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2272 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2273 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2274 }
2275
f60d94c0
ND		 2276 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2277 sum.OutPktsProtected,
2278 MACSEC_TXSC_STATS_ATTR_PAD) ||
2279 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2280 sum.OutPktsEncrypted,
2281 MACSEC_TXSC_STATS_ATTR_PAD) ||
2282 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2283 sum.OutOctetsProtected,
2284 MACSEC_TXSC_STATS_ATTR_PAD) ||
2285 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2286 sum.OutOctetsEncrypted,
2287 MACSEC_TXSC_STATS_ATTR_PAD))
c09440f7
SD		 2288 return -EMSGSIZE;
2289
2290 return 0;
2291}
2292
2293static int copy_secy_stats(struct sk_buff *skb,
2294 struct pcpu_secy_stats __percpu *pstats)
2295{
2296 struct macsec_dev_stats sum = {0, };
2297 int cpu;
2298
2299 for_each_possible_cpu(cpu) {
2300 const struct pcpu_secy_stats *stats;
2301 struct macsec_dev_stats tmp;
2302 unsigned int start;
2303
2304 stats = per_cpu_ptr(pstats, cpu);
2305 do {
2306 start = u64_stats_fetch_begin_irq(&stats->syncp);
2307 memcpy(&tmp, &stats->stats, sizeof(tmp));
2308 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2309
2310 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2311 sum.InPktsUntagged += tmp.InPktsUntagged;
2312 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2313 sum.InPktsNoTag += tmp.InPktsNoTag;
2314 sum.InPktsBadTag += tmp.InPktsBadTag;
2315 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2316 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2317 sum.InPktsOverrun += tmp.InPktsOverrun;
2318 }
2319
f60d94c0
ND		 2320 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2321 sum.OutPktsUntagged,
2322 MACSEC_SECY_STATS_ATTR_PAD) ||
2323 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2324 sum.InPktsUntagged,
2325 MACSEC_SECY_STATS_ATTR_PAD) ||
2326 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2327 sum.OutPktsTooLong,
2328 MACSEC_SECY_STATS_ATTR_PAD) ||
2329 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2330 sum.InPktsNoTag,
2331 MACSEC_SECY_STATS_ATTR_PAD) ||
2332 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2333 sum.InPktsBadTag,
2334 MACSEC_SECY_STATS_ATTR_PAD) ||
2335 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2336 sum.InPktsUnknownSCI,
2337 MACSEC_SECY_STATS_ATTR_PAD) ||
2338 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2339 sum.InPktsNoSCI,
2340 MACSEC_SECY_STATS_ATTR_PAD) ||
2341 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2342 sum.InPktsOverrun,
2343 MACSEC_SECY_STATS_ATTR_PAD))
c09440f7
SD		 2344 return -EMSGSIZE;
2345
2346 return 0;
2347}
2348
2349static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2350{
2351 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2352 struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
2353
2354 if (!secy_nest)
2355 return 1;
2356
f60d94c0
ND		 2357 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2358 MACSEC_SECY_ATTR_PAD) ||
2359 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
c0cc5316 2360 MACSEC_DEFAULT_CIPHER_ID,
f60d94c0 2361 MACSEC_SECY_ATTR_PAD) ||
c09440f7
SD		 2362 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2363 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2364 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2365 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2366 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2367 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2368 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2369 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2370 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2371 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2372 goto cancel;
2373
2374 if (secy->replay_protect) {
2375 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2376 goto cancel;
2377 }
2378
2379 nla_nest_end(skb, secy_nest);
2380 return 0;
2381
2382cancel:
2383 nla_nest_cancel(skb, secy_nest);
2384 return 1;
2385}
2386
2387static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
2388 struct sk_buff *skb, struct netlink_callback *cb)
2389{
2390 struct macsec_rx_sc *rx_sc;
2391 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2392 struct nlattr *txsa_list, *rxsc_list;
2393 int i, j;
2394 void *hdr;
2395 struct nlattr *attr;
2396
2397 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2398 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2399 if (!hdr)
2400 return -EMSGSIZE;
2401
96cfc505 2402 genl_dump_check_consistent(cb, hdr, &macsec_fam);
c09440f7
SD		 2403
2404 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2405 goto nla_put_failure;
2406
2407 if (nla_put_secy(secy, skb))
2408 goto nla_put_failure;
2409
2410 attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
2411 if (!attr)
2412 goto nla_put_failure;
2413 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2414 nla_nest_cancel(skb, attr);
2415 goto nla_put_failure;
2416 }
2417 nla_nest_end(skb, attr);
2418
2419 attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
2420 if (!attr)
2421 goto nla_put_failure;
2422 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2423 nla_nest_cancel(skb, attr);
2424 goto nla_put_failure;
2425 }
2426 nla_nest_end(skb, attr);
2427
2428 txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
2429 if (!txsa_list)
2430 goto nla_put_failure;
2431 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2432 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2433 struct nlattr *txsa_nest;
2434
2435 if (!tx_sa)
2436 continue;
2437
2438 txsa_nest = nla_nest_start(skb, j++);
2439 if (!txsa_nest) {
2440 nla_nest_cancel(skb, txsa_list);
2441 goto nla_put_failure;
2442 }
2443
2444 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2445 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
8acca6ac 2446 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
c09440f7
SD		 2447 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2448 nla_nest_cancel(skb, txsa_nest);
2449 nla_nest_cancel(skb, txsa_list);
2450 goto nla_put_failure;
2451 }
2452
2453 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2454 if (!attr) {
2455 nla_nest_cancel(skb, txsa_nest);
2456 nla_nest_cancel(skb, txsa_list);
2457 goto nla_put_failure;
2458 }
2459 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2460 nla_nest_cancel(skb, attr);
2461 nla_nest_cancel(skb, txsa_nest);
2462 nla_nest_cancel(skb, txsa_list);
2463 goto nla_put_failure;
2464 }
2465 nla_nest_end(skb, attr);
2466
2467 nla_nest_end(skb, txsa_nest);
2468 }
2469 nla_nest_end(skb, txsa_list);
2470
2471 rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
2472 if (!rxsc_list)
2473 goto nla_put_failure;
2474
2475 j = 1;
2476 for_each_rxsc_rtnl(secy, rx_sc) {
2477 int k;
2478 struct nlattr *rxsa_list;
2479 struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
2480
2481 if (!rxsc_nest) {
2482 nla_nest_cancel(skb, rxsc_list);
2483 goto nla_put_failure;
2484 }
2485
2486 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
f60d94c0
ND		 2487 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2488 MACSEC_RXSC_ATTR_PAD)) {
c09440f7
SD		 2489 nla_nest_cancel(skb, rxsc_nest);
2490 nla_nest_cancel(skb, rxsc_list);
2491 goto nla_put_failure;
2492 }
2493
2494 attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
2495 if (!attr) {
2496 nla_nest_cancel(skb, rxsc_nest);
2497 nla_nest_cancel(skb, rxsc_list);
2498 goto nla_put_failure;
2499 }
2500 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2501 nla_nest_cancel(skb, attr);
2502 nla_nest_cancel(skb, rxsc_nest);
2503 nla_nest_cancel(skb, rxsc_list);
2504 goto nla_put_failure;
2505 }
2506 nla_nest_end(skb, attr);
2507
2508 rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
2509 if (!rxsa_list) {
2510 nla_nest_cancel(skb, rxsc_nest);
2511 nla_nest_cancel(skb, rxsc_list);
2512 goto nla_put_failure;
2513 }
2514
2515 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2516 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2517 struct nlattr *rxsa_nest;
2518
2519 if (!rx_sa)
2520 continue;
2521
2522 rxsa_nest = nla_nest_start(skb, k++);
2523 if (!rxsa_nest) {
2524 nla_nest_cancel(skb, rxsa_list);
2525 nla_nest_cancel(skb, rxsc_nest);
2526 nla_nest_cancel(skb, rxsc_list);
2527 goto nla_put_failure;
2528 }
2529
2530 attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
2531 if (!attr) {
2532 nla_nest_cancel(skb, rxsa_list);
2533 nla_nest_cancel(skb, rxsc_nest);
2534 nla_nest_cancel(skb, rxsc_list);
2535 goto nla_put_failure;
2536 }
2537 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2538 nla_nest_cancel(skb, attr);
2539 nla_nest_cancel(skb, rxsa_list);
2540 nla_nest_cancel(skb, rxsc_nest);
2541 nla_nest_cancel(skb, rxsc_list);
2542 goto nla_put_failure;
2543 }
2544 nla_nest_end(skb, attr);
2545
2546 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2547 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
8acca6ac 2548 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
c09440f7
SD		 2549 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2550 nla_nest_cancel(skb, rxsa_nest);
2551 nla_nest_cancel(skb, rxsc_nest);
2552 nla_nest_cancel(skb, rxsc_list);
2553 goto nla_put_failure;
2554 }
2555 nla_nest_end(skb, rxsa_nest);
2556 }
2557
2558 nla_nest_end(skb, rxsa_list);
2559 nla_nest_end(skb, rxsc_nest);
2560 }
2561
2562 nla_nest_end(skb, rxsc_list);
2563
c09440f7
SD		 2564 genlmsg_end(skb, hdr);
2565
2566 return 0;
2567
2568nla_put_failure:
c09440f7
SD		 2569 genlmsg_cancel(skb, hdr);
2570 return -EMSGSIZE;
2571}
2572
96cfc505
SD		 2573static int macsec_generation = 1; /* protected by RTNL */
2574
c09440f7
SD		 2575static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2576{
2577 struct net *net = sock_net(skb->sk);
2578 struct net_device *dev;
2579 int dev_idx, d;
2580
2581 dev_idx = cb->args[0];
2582
2583 d = 0;
c10c63ea 2584 rtnl_lock();
96cfc505
SD		 2585
2586 cb->seq = macsec_generation;
2587
c09440f7
SD		 2588 for_each_netdev(net, dev) {
2589 struct macsec_secy *secy;
2590
2591 if (d < dev_idx)
2592 goto next;
2593
2594 if (!netif_is_macsec(dev))
2595 goto next;
2596
2597 secy = &macsec_priv(dev)->secy;
2598 if (dump_secy(secy, dev, skb, cb) < 0)
2599 goto done;
2600next:
2601 d++;
2602 }
2603
2604done:
c10c63ea 2605 rtnl_unlock();
c09440f7
SD		 2606 cb->args[0] = d;
2607 return skb->len;
2608}
2609
2610static const struct genl_ops macsec_genl_ops[] = {
2611 {
2612 .cmd = MACSEC_CMD_GET_TXSC,
2613 .dumpit = macsec_dump_txsc,
2614 .policy = macsec_genl_policy,
2615 },
2616 {
2617 .cmd = MACSEC_CMD_ADD_RXSC,
2618 .doit = macsec_add_rxsc,
2619 .policy = macsec_genl_policy,
2620 .flags = GENL_ADMIN_PERM,
2621 },
2622 {
2623 .cmd = MACSEC_CMD_DEL_RXSC,
2624 .doit = macsec_del_rxsc,
2625 .policy = macsec_genl_policy,
2626 .flags = GENL_ADMIN_PERM,
2627 },
2628 {
2629 .cmd = MACSEC_CMD_UPD_RXSC,
2630 .doit = macsec_upd_rxsc,
2631 .policy = macsec_genl_policy,
2632 .flags = GENL_ADMIN_PERM,
2633 },
2634 {
2635 .cmd = MACSEC_CMD_ADD_TXSA,
2636 .doit = macsec_add_txsa,
2637 .policy = macsec_genl_policy,
2638 .flags = GENL_ADMIN_PERM,
2639 },
2640 {
2641 .cmd = MACSEC_CMD_DEL_TXSA,
2642 .doit = macsec_del_txsa,
2643 .policy = macsec_genl_policy,
2644 .flags = GENL_ADMIN_PERM,
2645 },
2646 {
2647 .cmd = MACSEC_CMD_UPD_TXSA,
2648 .doit = macsec_upd_txsa,
2649 .policy = macsec_genl_policy,
2650 .flags = GENL_ADMIN_PERM,
2651 },
2652 {
2653 .cmd = MACSEC_CMD_ADD_RXSA,
2654 .doit = macsec_add_rxsa,
2655 .policy = macsec_genl_policy,
2656 .flags = GENL_ADMIN_PERM,
2657 },
2658 {
2659 .cmd = MACSEC_CMD_DEL_RXSA,
2660 .doit = macsec_del_rxsa,
2661 .policy = macsec_genl_policy,
2662 .flags = GENL_ADMIN_PERM,
2663 },
2664 {
2665 .cmd = MACSEC_CMD_UPD_RXSA,
2666 .doit = macsec_upd_rxsa,
2667 .policy = macsec_genl_policy,
2668 .flags = GENL_ADMIN_PERM,
2669 },
2670};
2671
56989f6d 2672static struct genl_family macsec_fam __ro_after_init = {
489111e5
JB		 2673 .name = MACSEC_GENL_NAME,
2674 .hdrsize = 0,
2675 .version = MACSEC_GENL_VERSION,
2676 .maxattr = MACSEC_ATTR_MAX,
2677 .netnsok = true,
2678 .module = THIS_MODULE,
2679 .ops = macsec_genl_ops,
2680 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2681};
2682
c09440f7
SD		 2683static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2684 struct net_device *dev)
2685{
2686 struct macsec_dev *macsec = netdev_priv(dev);
2687 struct macsec_secy *secy = &macsec->secy;
2688 struct pcpu_secy_stats *secy_stats;
2689 int ret, len;
2690
2691 /* 10.5 */
2692 if (!secy->protect_frames) {
2693 secy_stats = this_cpu_ptr(macsec->stats);
2694 u64_stats_update_begin(&secy_stats->syncp);
2695 secy_stats->stats.OutPktsUntagged++;
2696 u64_stats_update_end(&secy_stats->syncp);
79c62220 2697 skb->dev = macsec->real_dev;
c09440f7
SD		 2698 len = skb->len;
2699 ret = dev_queue_xmit(skb);
2700 count_tx(dev, ret, len);
2701 return ret;
2702 }
2703
2704 if (!secy->operational) {
2705 kfree_skb(skb);
2706 dev->stats.tx_dropped++;
2707 return NETDEV_TX_OK;
2708 }
2709
2710 skb = macsec_encrypt(skb, dev);
2711 if (IS_ERR(skb)) {
2712 if (PTR_ERR(skb) != -EINPROGRESS)
2713 dev->stats.tx_dropped++;
2714 return NETDEV_TX_OK;
2715 }
2716
2717 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2718
2719 macsec_encrypt_finish(skb, dev);
2720 len = skb->len;
2721 ret = dev_queue_xmit(skb);
2722 count_tx(dev, ret, len);
2723 return ret;
2724}
2725
2726#define MACSEC_FEATURES \
2727 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
e2003872
SD		 2728static struct lock_class_key macsec_netdev_addr_lock_key;
2729
c09440f7
SD		 2730static int macsec_dev_init(struct net_device *dev)
2731{
2732 struct macsec_dev *macsec = macsec_priv(dev);
2733 struct net_device *real_dev = macsec->real_dev;
5491e7c6 2734 int err;
c09440f7
SD		 2735
2736 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2737 if (!dev->tstats)
2738 return -ENOMEM;
2739
5491e7c6
PA		 2740 err = gro_cells_init(&macsec->gro_cells, dev);
2741 if (err) {
2742 free_percpu(dev->tstats);
2743 return err;
2744 }
2745
c09440f7
SD		 2746 dev->features = real_dev->features & MACSEC_FEATURES;
2747 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2748
2749 dev->needed_headroom = real_dev->needed_headroom +
2750 MACSEC_NEEDED_HEADROOM;
2751 dev->needed_tailroom = real_dev->needed_tailroom +
2752 MACSEC_NEEDED_TAILROOM;
2753
2754 if (is_zero_ether_addr(dev->dev_addr))
2755 eth_hw_addr_inherit(dev, real_dev);
2756 if (is_zero_ether_addr(dev->broadcast))
2757 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2758
2759 return 0;
2760}
2761
2762static void macsec_dev_uninit(struct net_device *dev)
2763{
5491e7c6
PA		 2764 struct macsec_dev *macsec = macsec_priv(dev);
2765
2766 gro_cells_destroy(&macsec->gro_cells);
c09440f7
SD		 2767 free_percpu(dev->tstats);
2768}
2769
2770static netdev_features_t macsec_fix_features(struct net_device *dev,
2771 netdev_features_t features)
2772{
2773 struct macsec_dev *macsec = macsec_priv(dev);
2774 struct net_device *real_dev = macsec->real_dev;
2775
5491e7c6
PA		 2776 features &= (real_dev->features & MACSEC_FEATURES) |
2777 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2778 features |= NETIF_F_LLTX;
c09440f7
SD		 2779
2780 return features;
2781}
2782
2783static int macsec_dev_open(struct net_device *dev)
2784{
2785 struct macsec_dev *macsec = macsec_priv(dev);
2786 struct net_device *real_dev = macsec->real_dev;
2787 int err;
2788
2789 if (!(real_dev->flags & IFF_UP))
2790 return -ENETDOWN;
2791
2792 err = dev_uc_add(real_dev, dev->dev_addr);
2793 if (err < 0)
2794 return err;
2795
2796 if (dev->flags & IFF_ALLMULTI) {
2797 err = dev_set_allmulti(real_dev, 1);
2798 if (err < 0)
2799 goto del_unicast;
2800 }
2801
2802 if (dev->flags & IFF_PROMISC) {
2803 err = dev_set_promiscuity(real_dev, 1);
2804 if (err < 0)
2805 goto clear_allmulti;
2806 }
2807
2808 if (netif_carrier_ok(real_dev))
2809 netif_carrier_on(dev);
2810
2811 return 0;
2812clear_allmulti:
2813 if (dev->flags & IFF_ALLMULTI)
2814 dev_set_allmulti(real_dev, -1);
2815del_unicast:
2816 dev_uc_del(real_dev, dev->dev_addr);
2817 netif_carrier_off(dev);
2818 return err;
2819}
2820
2821static int macsec_dev_stop(struct net_device *dev)
2822{
2823 struct macsec_dev *macsec = macsec_priv(dev);
2824 struct net_device *real_dev = macsec->real_dev;
2825
2826 netif_carrier_off(dev);
2827
2828 dev_mc_unsync(real_dev, dev);
2829 dev_uc_unsync(real_dev, dev);
2830
2831 if (dev->flags & IFF_ALLMULTI)
2832 dev_set_allmulti(real_dev, -1);
2833
2834 if (dev->flags & IFF_PROMISC)
2835 dev_set_promiscuity(real_dev, -1);
2836
2837 dev_uc_del(real_dev, dev->dev_addr);
2838
2839 return 0;
2840}
2841
2842static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2843{
2844 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2845
2846 if (!(dev->flags & IFF_UP))
2847 return;
2848
2849 if (change & IFF_ALLMULTI)
2850 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2851
2852 if (change & IFF_PROMISC)
2853 dev_set_promiscuity(real_dev,
2854 dev->flags & IFF_PROMISC ? 1 : -1);
2855}
2856
2857static void macsec_dev_set_rx_mode(struct net_device *dev)
2858{
2859 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2860
2861 dev_mc_sync(real_dev, dev);
2862 dev_uc_sync(real_dev, dev);
2863}
2864
2865static int macsec_set_mac_address(struct net_device *dev, void *p)
2866{
2867 struct macsec_dev *macsec = macsec_priv(dev);
2868 struct net_device *real_dev = macsec->real_dev;
2869 struct sockaddr *addr = p;
2870 int err;
2871
2872 if (!is_valid_ether_addr(addr->sa_data))
2873 return -EADDRNOTAVAIL;
2874
2875 if (!(dev->flags & IFF_UP))
2876 goto out;
2877
2878 err = dev_uc_add(real_dev, addr->sa_data);
2879 if (err < 0)
2880 return err;
2881
2882 dev_uc_del(real_dev, dev->dev_addr);
2883
2884out:
2885 ether_addr_copy(dev->dev_addr, addr->sa_data);
2886 return 0;
2887}
2888
2889static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2890{
2891 struct macsec_dev *macsec = macsec_priv(dev);
2892 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2893
2894 if (macsec->real_dev->mtu - extra < new_mtu)
2895 return -ERANGE;
2896
2897 dev->mtu = new_mtu;
2898
2899 return 0;
2900}
2901
bc1f4470 2902static void macsec_get_stats64(struct net_device *dev,
2903 struct rtnl_link_stats64 *s)
c09440f7
SD		 2904{
2905 int cpu;
2906
2907 if (!dev->tstats)
bc1f4470 2908 return;
c09440f7
SD		 2909
2910 for_each_possible_cpu(cpu) {
2911 struct pcpu_sw_netstats *stats;
2912 struct pcpu_sw_netstats tmp;
2913 int start;
2914
2915 stats = per_cpu_ptr(dev->tstats, cpu);
2916 do {
2917 start = u64_stats_fetch_begin_irq(&stats->syncp);
2918 tmp.rx_packets = stats->rx_packets;
2919 tmp.rx_bytes = stats->rx_bytes;
2920 tmp.tx_packets = stats->tx_packets;
2921 tmp.tx_bytes = stats->tx_bytes;
2922 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2923
2924 s->rx_packets += tmp.rx_packets;
2925 s->rx_bytes += tmp.rx_bytes;
2926 s->tx_packets += tmp.tx_packets;
2927 s->tx_bytes += tmp.tx_bytes;
2928 }
2929
2930 s->rx_dropped = dev->stats.rx_dropped;
2931 s->tx_dropped = dev->stats.tx_dropped;
c09440f7
SD		 2932}
2933
2934static int macsec_get_iflink(const struct net_device *dev)
2935{
2936 return macsec_priv(dev)->real_dev->ifindex;
2937}
2938
e2003872
SD		 2939
2940static int macsec_get_nest_level(struct net_device *dev)
2941{
2942 return macsec_priv(dev)->nest_level;
2943}
2944
2945
c09440f7
SD		 2946static const struct net_device_ops macsec_netdev_ops = {
2947 .ndo_init = macsec_dev_init,
2948 .ndo_uninit = macsec_dev_uninit,
2949 .ndo_open = macsec_dev_open,
2950 .ndo_stop = macsec_dev_stop,
2951 .ndo_fix_features = macsec_fix_features,
2952 .ndo_change_mtu = macsec_change_mtu,
2953 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2954 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2955 .ndo_set_mac_address = macsec_set_mac_address,
2956 .ndo_start_xmit = macsec_start_xmit,
2957 .ndo_get_stats64 = macsec_get_stats64,
2958 .ndo_get_iflink = macsec_get_iflink,
e2003872 2959 .ndo_get_lock_subclass = macsec_get_nest_level,
c09440f7
SD		 2960};
2961
2962static const struct device_type macsec_type = {
2963 .name = "macsec",
2964};
2965
2966static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2967 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2968 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2969 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2970 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2971 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2972 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2973 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2974 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2975 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2976 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2977 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2978 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2979};
2980
2981static void macsec_free_netdev(struct net_device *dev)
2982{
2983 struct macsec_dev *macsec = macsec_priv(dev);
2984 struct net_device *real_dev = macsec->real_dev;
2985
2986 free_percpu(macsec->stats);
2987 free_percpu(macsec->secy.tx_sc.stats);
2988
2989 dev_put(real_dev);
2990 free_netdev(dev);
2991}
2992
2993static void macsec_setup(struct net_device *dev)
2994{
2995 ether_setup(dev);
91572088
JW		 2996 dev->min_mtu = 0;
2997 dev->max_mtu = ETH_MAX_MTU;
e425974f 2998 dev->priv_flags |= IFF_NO_QUEUE;
c09440f7
SD		 2999 dev->netdev_ops = &macsec_netdev_ops;
3000 dev->destructor = macsec_free_netdev;
c24acf03 3001 SET_NETDEV_DEVTYPE(dev, &macsec_type);
c09440f7
SD		 3002
3003 eth_zero_addr(dev->broadcast);
3004}
3005
3006static void macsec_changelink_common(struct net_device *dev,
3007 struct nlattr *data[])
3008{
3009 struct macsec_secy *secy;
3010 struct macsec_tx_sc *tx_sc;
3011
3012 secy = &macsec_priv(dev)->secy;
3013 tx_sc = &secy->tx_sc;
3014
3015 if (data[IFLA_MACSEC_ENCODING_SA]) {
3016 struct macsec_tx_sa *tx_sa;
3017
3018 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3019 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3020
3021 secy->operational = tx_sa && tx_sa->active;
3022 }
3023
3024 if (data[IFLA_MACSEC_WINDOW])
3025 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3026
3027 if (data[IFLA_MACSEC_ENCRYPT])
3028 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3029
3030 if (data[IFLA_MACSEC_PROTECT])
3031 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3032
3033 if (data[IFLA_MACSEC_INC_SCI])
3034 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3035
3036 if (data[IFLA_MACSEC_ES])
3037 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3038
3039 if (data[IFLA_MACSEC_SCB])
3040 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3041
3042 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3043 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3044
3045 if (data[IFLA_MACSEC_VALIDATION])
3046 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3047}
3048
3049static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3050 struct nlattr *data[])
3051{
3052 if (!data)
3053 return 0;
3054
3055 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3056 data[IFLA_MACSEC_ICV_LEN] ||
3057 data[IFLA_MACSEC_SCI] ||
3058 data[IFLA_MACSEC_PORT])
3059 return -EINVAL;
3060
3061 macsec_changelink_common(dev, data);
3062
3063 return 0;
3064}
3065
3066static void macsec_del_dev(struct macsec_dev *macsec)
3067{
3068 int i;
3069
3070 while (macsec->secy.rx_sc) {
3071 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3072
3073 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3074 free_rx_sc(rx_sc);
3075 }
3076
3077 for (i = 0; i < MACSEC_NUM_AN; i++) {
3078 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3079
3080 if (sa) {
3081 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3082 clear_tx_sa(sa);
3083 }
3084 }
3085}
3086
bbe11fab
SD		 3087static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3088{
3089 struct macsec_dev *macsec = macsec_priv(dev);
e2003872 3090 struct net_device *real_dev = macsec->real_dev;
bbe11fab
SD		 3091
3092 unregister_netdevice_queue(dev, head);
3093 list_del_rcu(&macsec->secys);
3094 macsec_del_dev(macsec);
e2003872 3095 netdev_upper_dev_unlink(real_dev, dev);
bbe11fab
SD		 3096
3097 macsec_generation++;
3098}
3099
c09440f7
SD		 3100static void macsec_dellink(struct net_device *dev, struct list_head *head)
3101{
3102 struct macsec_dev *macsec = macsec_priv(dev);
3103 struct net_device *real_dev = macsec->real_dev;
3104 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3105
bbe11fab 3106 macsec_common_dellink(dev, head);
96cfc505 3107
960d5848 3108 if (list_empty(&rxd->secys)) {
c09440f7 3109 netdev_rx_handler_unregister(real_dev);
960d5848
SD		 3110 kfree(rxd);
3111 }
c09440f7
SD		 3112}
3113
3114static int register_macsec_dev(struct net_device *real_dev,
3115 struct net_device *dev)
3116{
3117 struct macsec_dev *macsec = macsec_priv(dev);
3118 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3119
3120 if (!rxd) {
3121 int err;
3122
3123 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3124 if (!rxd)
3125 return -ENOMEM;
3126
3127 INIT_LIST_HEAD(&rxd->secys);
3128
3129 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3130 rxd);
960d5848
SD		 3131 if (err < 0) {
3132 kfree(rxd);
c09440f7 3133 return err;
960d5848 3134 }
c09440f7
SD		 3135 }
3136
3137 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3138 return 0;
3139}
3140
3141static bool sci_exists(struct net_device *dev, sci_t sci)
3142{
3143 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3144 struct macsec_dev *macsec;
3145
3146 list_for_each_entry(macsec, &rxd->secys, secys) {
3147 if (macsec->secy.sci == sci)
3148 return true;
3149 }
3150
3151 return false;
3152}
3153
3154static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3155{
3156 return make_sci(dev->dev_addr, port);
3157}
3158
3159static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3160{
3161 struct macsec_dev *macsec = macsec_priv(dev);
3162 struct macsec_secy *secy = &macsec->secy;
3163
3164 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3165 if (!macsec->stats)
3166 return -ENOMEM;
3167
3168 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3169 if (!secy->tx_sc.stats) {
3170 free_percpu(macsec->stats);
3171 return -ENOMEM;
3172 }
3173
3174 if (sci == MACSEC_UNDEF_SCI)
3175 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3176
3177 secy->netdev = dev;
3178 secy->operational = true;
3179 secy->key_len = DEFAULT_SAK_LEN;
3180 secy->icv_len = icv_len;
3181 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3182 secy->protect_frames = true;
3183 secy->replay_protect = false;
3184
3185 secy->sci = sci;
3186 secy->tx_sc.active = true;
3187 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3188 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3189 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3190 secy->tx_sc.end_station = false;
3191 secy->tx_sc.scb = false;
3192
3193 return 0;
3194}
3195
3196static int macsec_newlink(struct net *net, struct net_device *dev,
3197 struct nlattr *tb[], struct nlattr *data[])
3198{
3199 struct macsec_dev *macsec = macsec_priv(dev);
3200 struct net_device *real_dev;
3201 int err;
3202 sci_t sci;
3203 u8 icv_len = DEFAULT_ICV_LEN;
3204 rx_handler_func_t *rx_handler;
3205
3206 if (!tb[IFLA_LINK])
3207 return -EINVAL;
3208 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3209 if (!real_dev)
3210 return -ENODEV;
3211
3212 dev->priv_flags |= IFF_MACSEC;
3213
3214 macsec->real_dev = real_dev;
3215
3216 if (data && data[IFLA_MACSEC_ICV_LEN])
3217 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3218 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3219
3220 rx_handler = rtnl_dereference(real_dev->rx_handler);
3221 if (rx_handler && rx_handler != macsec_handle_frame)
3222 return -EBUSY;
3223
3224 err = register_netdevice(dev);
3225 if (err < 0)
3226 return err;
3227
0759e552
SD		 3228 dev_hold(real_dev);
3229
952fcfd0 3230 macsec->nest_level = dev_get_nest_level(real_dev) + 1;
e2003872
SD		 3231 netdev_lockdep_set_classes(dev);
3232 lockdep_set_class_and_subclass(&dev->addr_list_lock,
3233 &macsec_netdev_addr_lock_key,
3234 macsec_get_nest_level(dev));
3235
3236 err = netdev_upper_dev_link(real_dev, dev);
3237 if (err < 0)
3238 goto unregister;
3239
c09440f7
SD		 3240 /* need to be already registered so that ->init has run and
3241 * the MAC addr is set
3242 */
3243 if (data && data[IFLA_MACSEC_SCI])
3244 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3245 else if (data && data[IFLA_MACSEC_PORT])
3246 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3247 else
3248 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3249
3250 if (rx_handler && sci_exists(real_dev, sci)) {
3251 err = -EBUSY;
e2003872 3252 goto unlink;
c09440f7
SD		 3253 }
3254
3255 err = macsec_add_dev(dev, sci, icv_len);
3256 if (err)
e2003872 3257 goto unlink;
c09440f7
SD		 3258
3259 if (data)
3260 macsec_changelink_common(dev, data);
3261
3262 err = register_macsec_dev(real_dev, dev);
3263 if (err < 0)
3264 goto del_dev;
3265
96cfc505
SD		 3266 macsec_generation++;
3267
c09440f7
SD		 3268 return 0;
3269
3270del_dev:
3271 macsec_del_dev(macsec);
e2003872
SD		 3272unlink:
3273 netdev_upper_dev_unlink(real_dev, dev);
c09440f7
SD		 3274unregister:
3275 unregister_netdevice(dev);
3276 return err;
3277}
3278
3279static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[])
3280{
74816480 3281 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
c09440f7
SD		 3282 u8 icv_len = DEFAULT_ICV_LEN;
3283 int flag;
3284 bool es, scb, sci;
3285
3286 if (!data)
3287 return 0;
3288
3289 if (data[IFLA_MACSEC_CIPHER_SUITE])
3290 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3291
f04c392d 3292 if (data[IFLA_MACSEC_ICV_LEN]) {
c09440f7 3293 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
f04c392d
DC		 3294 if (icv_len != DEFAULT_ICV_LEN) {
3295 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3296 struct crypto_aead *dummy_tfm;
3297
3298 dummy_tfm = macsec_alloc_tfm(dummy_key,
3299 DEFAULT_SAK_LEN,
3300 icv_len);
3301 if (IS_ERR(dummy_tfm))
3302 return PTR_ERR(dummy_tfm);
3303 crypto_free_aead(dummy_tfm);
3304 }
3305 }
c09440f7
SD		 3306
3307 switch (csid) {
74816480
SD		 3308 case MACSEC_DEFAULT_CIPHER_ID:
3309 case MACSEC_DEFAULT_CIPHER_ALT:
c09440f7 3310 if (icv_len < MACSEC_MIN_ICV_LEN ||
2ccbe2cb 3311 icv_len > MACSEC_STD_ICV_LEN)
c09440f7
SD		 3312 return -EINVAL;
3313 break;
3314 default:
3315 return -EINVAL;
3316 }
3317
3318 if (data[IFLA_MACSEC_ENCODING_SA]) {
3319 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3320 return -EINVAL;
3321 }
3322
3323 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3324 flag < IFLA_MACSEC_VALIDATION;
3325 flag++) {
3326 if (data[flag]) {
3327 if (nla_get_u8(data[flag]) > 1)
3328 return -EINVAL;
3329 }
3330 }
3331
3332 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3333 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3334 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3335
3336 if ((sci && (scb || es)) || (scb && es))
3337 return -EINVAL;
3338
3339 if (data[IFLA_MACSEC_VALIDATION] &&
3340 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3341 return -EINVAL;
3342
4b1fb935
SD		 3343 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3344 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
c09440f7
SD		 3345 !data[IFLA_MACSEC_WINDOW])
3346 return -EINVAL;
3347
3348 return 0;
3349}
3350
3351static struct net *macsec_get_link_net(const struct net_device *dev)
3352{
3353 return dev_net(macsec_priv(dev)->real_dev);
3354}
3355
3356static size_t macsec_get_size(const struct net_device *dev)
3357{
c9fba3ed
ZS		 3358 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3359 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3360 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3361 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3362 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3363 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3364 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3365 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3366 nla_total_size(1) + /* IFLA_MACSEC_ES */
3367 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3368 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3369 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
c09440f7
SD		 3370 0;
3371}
3372
3373static int macsec_fill_info(struct sk_buff *skb,
3374 const struct net_device *dev)
3375{
3376 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3377 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3378
f60d94c0
ND		 3379 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3380 IFLA_MACSEC_PAD) ||
c09440f7 3381 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
f60d94c0 3382 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
c0cc5316 3383 MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) ||
c09440f7
SD		 3384 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3385 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3386 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3387 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3388 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3389 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3390 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3391 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3392 0)
3393 goto nla_put_failure;
3394
3395 if (secy->replay_protect) {
3396 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3397 goto nla_put_failure;
3398 }
3399
3400 return 0;
3401
3402nla_put_failure:
3403 return -EMSGSIZE;
3404}
3405
3406static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3407 .kind = "macsec",
3408 .priv_size = sizeof(struct macsec_dev),
3409 .maxtype = IFLA_MACSEC_MAX,
3410 .policy = macsec_rtnl_policy,
3411 .setup = macsec_setup,
3412 .validate = macsec_validate_attr,
3413 .newlink = macsec_newlink,
3414 .changelink = macsec_changelink,
3415 .dellink = macsec_dellink,
3416 .get_size = macsec_get_size,
3417 .fill_info = macsec_fill_info,
3418 .get_link_net = macsec_get_link_net,
3419};
3420
3421static bool is_macsec_master(struct net_device *dev)
3422{
3423 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3424}
3425
3426static int macsec_notify(struct notifier_block *this, unsigned long event,
3427 void *ptr)
3428{
3429 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3430 LIST_HEAD(head);
3431
3432 if (!is_macsec_master(real_dev))
3433 return NOTIFY_DONE;
3434
3435 switch (event) {
3436 case NETDEV_UNREGISTER: {
3437 struct macsec_dev *m, *n;
3438 struct macsec_rxh_data *rxd;
3439
3440 rxd = macsec_data_rtnl(real_dev);
3441 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
bbe11fab 3442 macsec_common_dellink(m->secy.netdev, &head);
c09440f7 3443 }
bbe11fab
SD		 3444
3445 netdev_rx_handler_unregister(real_dev);
3446 kfree(rxd);
3447
c09440f7
SD		 3448 unregister_netdevice_many(&head);
3449 break;
3450 }
3451 case NETDEV_CHANGEMTU: {
3452 struct macsec_dev *m;
3453 struct macsec_rxh_data *rxd;
3454
3455 rxd = macsec_data_rtnl(real_dev);
3456 list_for_each_entry(m, &rxd->secys, secys) {
3457 struct net_device *dev = m->secy.netdev;
3458 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3459 macsec_extra_len(true));
3460
3461 if (dev->mtu > mtu)
3462 dev_set_mtu(dev, mtu);
3463 }
3464 }
3465 }
3466
3467 return NOTIFY_OK;
3468}
3469
3470static struct notifier_block macsec_notifier = {
3471 .notifier_call = macsec_notify,
3472};
3473
3474static int __init macsec_init(void)
3475{
3476 int err;
3477
3478 pr_info("MACsec IEEE 802.1AE\n");
3479 err = register_netdevice_notifier(&macsec_notifier);
3480 if (err)
3481 return err;
3482
3483 err = rtnl_link_register(&macsec_link_ops);
3484 if (err)
3485 goto notifier;
3486
489111e5 3487 err = genl_register_family(&macsec_fam);
c09440f7
SD		 3488 if (err)
3489 goto rtnl;
3490
3491 return 0;
3492
3493rtnl:
3494 rtnl_link_unregister(&macsec_link_ops);
3495notifier:
3496 unregister_netdevice_notifier(&macsec_notifier);
3497 return err;
3498}
3499
3500static void __exit macsec_exit(void)
3501{
3502 genl_unregister_family(&macsec_fam);
3503 rtnl_link_unregister(&macsec_link_ops);
3504 unregister_netdevice_notifier(&macsec_notifier);
b196c22a 3505 rcu_barrier();
c09440f7
SD		 3506}
3507
3508module_init(macsec_init);
3509module_exit(macsec_exit);
3510
3511MODULE_ALIAS_RTNL_LINK("macsec");
3512
3513MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3514MODULE_LICENSE("GPL v2");
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