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netlink: add NLA_MIN_LEN
[mirror_ubuntu-hirsute-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>
e187246f 19#include <linux/refcount.h>
c09440f7
SD		 20#include <net/genetlink.h>
21#include <net/sock.h>
5491e7c6 22#include <net/gro_cells.h>
c09440f7
SD		 23
24#include <uapi/linux/if_macsec.h>
25
26typedef u64 __bitwise sci_t;
27
28#define MACSEC_SCI_LEN 8
29
30/* SecTAG length = macsec_eth_header without the optional SCI */
31#define MACSEC_TAG_LEN 6
32
33struct macsec_eth_header {
34 struct ethhdr eth;
35 /* SecTAG */
36 u8 tci_an;
37#if defined(__LITTLE_ENDIAN_BITFIELD)
38 u8 short_length:6,
39 unused:2;
40#elif defined(__BIG_ENDIAN_BITFIELD)
41 u8 unused:2,
42 short_length:6;
43#else
44#error "Please fix <asm/byteorder.h>"
45#endif
46 __be32 packet_number;
47 u8 secure_channel_id[8]; /* optional */
48} __packed;
49
50#define MACSEC_TCI_VERSION 0x80
51#define MACSEC_TCI_ES 0x40 /* end station */
52#define MACSEC_TCI_SC 0x20 /* SCI present */
53#define MACSEC_TCI_SCB 0x10 /* epon */
54#define MACSEC_TCI_E 0x08 /* encryption */
55#define MACSEC_TCI_C 0x04 /* changed text */
56#define MACSEC_AN_MASK 0x03 /* association number */
57#define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
58
59/* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
60#define MIN_NON_SHORT_LEN 48
61
62#define GCM_AES_IV_LEN 12
63#define DEFAULT_ICV_LEN 16
64
65#define MACSEC_NUM_AN 4 /* 2 bits for the association number */
66
7979472b 67#define for_each_rxsc(secy, sc) \
c09440f7 68 for (sc = rcu_dereference_bh(secy->rx_sc); \
7979472b 69 sc; \
c09440f7
SD		 70 sc = rcu_dereference_bh(sc->next))
71#define for_each_rxsc_rtnl(secy, sc) \
72 for (sc = rtnl_dereference(secy->rx_sc); \
73 sc; \
74 sc = rtnl_dereference(sc->next))
75
76struct gcm_iv {
77 union {
78 u8 secure_channel_id[8];
79 sci_t sci;
80 };
81 __be32 pn;
82};
83
84/**
85 * struct macsec_key - SA key
86 * @id: user-provided key identifier
87 * @tfm: crypto struct, key storage
88 */
89struct macsec_key {
8acca6ac 90 u8 id[MACSEC_KEYID_LEN];
c09440f7
SD		 91 struct crypto_aead *tfm;
92};
93
94struct macsec_rx_sc_stats {
95 __u64 InOctetsValidated;
96 __u64 InOctetsDecrypted;
97 __u64 InPktsUnchecked;
98 __u64 InPktsDelayed;
99 __u64 InPktsOK;
100 __u64 InPktsInvalid;
101 __u64 InPktsLate;
102 __u64 InPktsNotValid;
103 __u64 InPktsNotUsingSA;
104 __u64 InPktsUnusedSA;
105};
106
107struct macsec_rx_sa_stats {
108 __u32 InPktsOK;
109 __u32 InPktsInvalid;
110 __u32 InPktsNotValid;
111 __u32 InPktsNotUsingSA;
112 __u32 InPktsUnusedSA;
113};
114
115struct macsec_tx_sa_stats {
116 __u32 OutPktsProtected;
117 __u32 OutPktsEncrypted;
118};
119
120struct macsec_tx_sc_stats {
121 __u64 OutPktsProtected;
122 __u64 OutPktsEncrypted;
123 __u64 OutOctetsProtected;
124 __u64 OutOctetsEncrypted;
125};
126
127struct macsec_dev_stats {
128 __u64 OutPktsUntagged;
129 __u64 InPktsUntagged;
130 __u64 OutPktsTooLong;
131 __u64 InPktsNoTag;
132 __u64 InPktsBadTag;
133 __u64 InPktsUnknownSCI;
134 __u64 InPktsNoSCI;
135 __u64 InPktsOverrun;
136};
137
138/**
139 * struct macsec_rx_sa - receive secure association
140 * @active:
141 * @next_pn: packet number expected for the next packet
142 * @lock: protects next_pn manipulations
143 * @key: key structure
144 * @stats: per-SA stats
145 */
146struct macsec_rx_sa {
147 struct macsec_key key;
148 spinlock_t lock;
149 u32 next_pn;
e187246f 150 refcount_t refcnt;
c09440f7
SD		 151 bool active;
152 struct macsec_rx_sa_stats __percpu *stats;
153 struct macsec_rx_sc *sc;
154 struct rcu_head rcu;
155};
156
157struct pcpu_rx_sc_stats {
158 struct macsec_rx_sc_stats stats;
159 struct u64_stats_sync syncp;
160};
161
162/**
163 * struct macsec_rx_sc - receive secure channel
164 * @sci: secure channel identifier for this SC
165 * @active: channel is active
166 * @sa: array of secure associations
167 * @stats: per-SC stats
168 */
169struct macsec_rx_sc {
170 struct macsec_rx_sc __rcu *next;
171 sci_t sci;
172 bool active;
173 struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
174 struct pcpu_rx_sc_stats __percpu *stats;
8676d76f 175 refcount_t refcnt;
c09440f7
SD		 176 struct rcu_head rcu_head;
177};
178
179/**
180 * struct macsec_tx_sa - transmit secure association
181 * @active:
182 * @next_pn: packet number to use for the next packet
183 * @lock: protects next_pn manipulations
184 * @key: key structure
185 * @stats: per-SA stats
186 */
187struct macsec_tx_sa {
188 struct macsec_key key;
189 spinlock_t lock;
190 u32 next_pn;
28206cdb 191 refcount_t refcnt;
c09440f7
SD		 192 bool active;
193 struct macsec_tx_sa_stats __percpu *stats;
194 struct rcu_head rcu;
195};
196
197struct pcpu_tx_sc_stats {
198 struct macsec_tx_sc_stats stats;
199 struct u64_stats_sync syncp;
200};
201
202/**
203 * struct macsec_tx_sc - transmit secure channel
204 * @active:
205 * @encoding_sa: association number of the SA currently in use
206 * @encrypt: encrypt packets on transmit, or authenticate only
207 * @send_sci: always include the SCI in the SecTAG
208 * @end_station:
209 * @scb: single copy broadcast flag
210 * @sa: array of secure associations
211 * @stats: stats for this TXSC
212 */
213struct macsec_tx_sc {
214 bool active;
215 u8 encoding_sa;
216 bool encrypt;
217 bool send_sci;
218 bool end_station;
219 bool scb;
220 struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
221 struct pcpu_tx_sc_stats __percpu *stats;
222};
223
224#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
225
226/**
227 * struct macsec_secy - MACsec Security Entity
228 * @netdev: netdevice for this SecY
229 * @n_rx_sc: number of receive secure channels configured on this SecY
230 * @sci: secure channel identifier used for tx
231 * @key_len: length of keys used by the cipher suite
232 * @icv_len: length of ICV used by the cipher suite
233 * @validate_frames: validation mode
234 * @operational: MAC_Operational flag
235 * @protect_frames: enable protection for this SecY
236 * @replay_protect: enable packet number checks on receive
237 * @replay_window: size of the replay window
238 * @tx_sc: transmit secure channel
239 * @rx_sc: linked list of receive secure channels
240 */
241struct macsec_secy {
242 struct net_device *netdev;
243 unsigned int n_rx_sc;
244 sci_t sci;
245 u16 key_len;
246 u16 icv_len;
247 enum macsec_validation_type validate_frames;
248 bool operational;
249 bool protect_frames;
250 bool replay_protect;
251 u32 replay_window;
252 struct macsec_tx_sc tx_sc;
253 struct macsec_rx_sc __rcu *rx_sc;
254};
255
256struct pcpu_secy_stats {
257 struct macsec_dev_stats stats;
258 struct u64_stats_sync syncp;
259};
260
261/**
262 * struct macsec_dev - private data
263 * @secy: SecY config
264 * @real_dev: pointer to underlying netdevice
265 * @stats: MACsec device stats
266 * @secys: linked list of SecY's on the underlying device
267 */
268struct macsec_dev {
269 struct macsec_secy secy;
270 struct net_device *real_dev;
271 struct pcpu_secy_stats __percpu *stats;
272 struct list_head secys;
5491e7c6 273 struct gro_cells gro_cells;
e2003872 274 unsigned int nest_level;
c09440f7
SD		 275};
276
277/**
278 * struct macsec_rxh_data - rx_handler private argument
279 * @secys: linked list of SecY's on this underlying device
280 */
281struct macsec_rxh_data {
282 struct list_head secys;
283};
284
285static struct macsec_dev *macsec_priv(const struct net_device *dev)
286{
287 return (struct macsec_dev *)netdev_priv(dev);
288}
289
290static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
291{
292 return rcu_dereference_bh(dev->rx_handler_data);
293}
294
295static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
296{
297 return rtnl_dereference(dev->rx_handler_data);
298}
299
300struct macsec_cb {
301 struct aead_request *req;
302 union {
303 struct macsec_tx_sa *tx_sa;
304 struct macsec_rx_sa *rx_sa;
305 };
306 u8 assoc_num;
307 bool valid;
308 bool has_sci;
309};
310
311static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
312{
313 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
314
315 if (!sa || !sa->active)
316 return NULL;
317
e187246f 318 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 319 return NULL;
320
321 return sa;
322}
323
324static void free_rx_sc_rcu(struct rcu_head *head)
325{
326 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
327
328 free_percpu(rx_sc->stats);
329 kfree(rx_sc);
330}
331
332static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
333{
8676d76f 334 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
c09440f7
SD		 335}
336
337static void macsec_rxsc_put(struct macsec_rx_sc *sc)
338{
8676d76f 339 if (refcount_dec_and_test(&sc->refcnt))
c09440f7
SD		 340 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
341}
342
343static void free_rxsa(struct rcu_head *head)
344{
345 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
346
347 crypto_free_aead(sa->key.tfm);
348 free_percpu(sa->stats);
c09440f7
SD		 349 kfree(sa);
350}
351
352static void macsec_rxsa_put(struct macsec_rx_sa *sa)
353{
e187246f 354 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 355 call_rcu(&sa->rcu, free_rxsa);
356}
357
358static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
359{
360 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
361
362 if (!sa || !sa->active)
363 return NULL;
364
28206cdb 365 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 366 return NULL;
367
368 return sa;
369}
370
371static void free_txsa(struct rcu_head *head)
372{
373 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
374
375 crypto_free_aead(sa->key.tfm);
376 free_percpu(sa->stats);
377 kfree(sa);
378}
379
380static void macsec_txsa_put(struct macsec_tx_sa *sa)
381{
28206cdb 382 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 383 call_rcu(&sa->rcu, free_txsa);
384}
385
386static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
387{
388 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
389 return (struct macsec_cb *)skb->cb;
390}
391
392#define MACSEC_PORT_ES (htons(0x0001))
393#define MACSEC_PORT_SCB (0x0000)
394#define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
395
ccfdec90
FW		 396#define MACSEC_GCM_AES_128_SAK_LEN 16
397#define MACSEC_GCM_AES_256_SAK_LEN 32
398
ccfdec90 399#define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
c09440f7
SD		 400#define DEFAULT_SEND_SCI true
401#define DEFAULT_ENCRYPT false
402#define DEFAULT_ENCODING_SA 0
403
e0f841f5
TB		 404static bool send_sci(const struct macsec_secy *secy)
405{
406 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
407
408 return tx_sc->send_sci ||
409 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
410}
411
c09440f7
SD		 412static sci_t make_sci(u8 *addr, __be16 port)
413{
414 sci_t sci;
415
416 memcpy(&sci, addr, ETH_ALEN);
417 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
418
419 return sci;
420}
421
422static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
423{
424 sci_t sci;
425
426 if (sci_present)
427 memcpy(&sci, hdr->secure_channel_id,
428 sizeof(hdr->secure_channel_id));
429 else
430 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
431
432 return sci;
433}
434
435static unsigned int macsec_sectag_len(bool sci_present)
436{
437 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
438}
439
440static unsigned int macsec_hdr_len(bool sci_present)
441{
442 return macsec_sectag_len(sci_present) + ETH_HLEN;
443}
444
445static unsigned int macsec_extra_len(bool sci_present)
446{
447 return macsec_sectag_len(sci_present) + sizeof(__be16);
448}
449
450/* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
451static void macsec_fill_sectag(struct macsec_eth_header *h,
e0f841f5
TB		 452 const struct macsec_secy *secy, u32 pn,
453 bool sci_present)
c09440f7
SD		 454{
455 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
456
e0f841f5 457 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
c09440f7
SD		 458 h->eth.h_proto = htons(ETH_P_MACSEC);
459
e0f841f5 460 if (sci_present) {
c09440f7
SD		 461 h->tci_an |= MACSEC_TCI_SC;
462 memcpy(&h->secure_channel_id, &secy->sci,
463 sizeof(h->secure_channel_id));
464 } else {
465 if (tx_sc->end_station)
466 h->tci_an |= MACSEC_TCI_ES;
467 if (tx_sc->scb)
468 h->tci_an |= MACSEC_TCI_SCB;
469 }
470
471 h->packet_number = htonl(pn);
472
473 /* with GCM, C/E clear for !encrypt, both set for encrypt */
474 if (tx_sc->encrypt)
475 h->tci_an |= MACSEC_TCI_CONFID;
476 else if (secy->icv_len != DEFAULT_ICV_LEN)
477 h->tci_an |= MACSEC_TCI_C;
478
479 h->tci_an |= tx_sc->encoding_sa;
480}
481
482static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
483{
484 if (data_len < MIN_NON_SHORT_LEN)
485 h->short_length = data_len;
486}
487
488/* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
489static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
490{
491 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
492 int len = skb->len - 2 * ETH_ALEN;
493 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
494
495 /* a) It comprises at least 17 octets */
496 if (skb->len <= 16)
497 return false;
498
499 /* b) MACsec EtherType: already checked */
500
501 /* c) V bit is clear */
502 if (h->tci_an & MACSEC_TCI_VERSION)
503 return false;
504
505 /* d) ES or SCB => !SC */
506 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
507 (h->tci_an & MACSEC_TCI_SC))
508 return false;
509
510 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
511 if (h->unused)
512 return false;
513
514 /* rx.pn != 0 (figure 10-5) */
515 if (!h->packet_number)
516 return false;
517
518 /* length check, f) g) h) i) */
519 if (h->short_length)
520 return len == extra_len + h->short_length;
521 return len >= extra_len + MIN_NON_SHORT_LEN;
522}
523
524#define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
2ccbe2cb 525#define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
c09440f7
SD		 526
527static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
528{
529 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
530
531 gcm_iv->sci = sci;
532 gcm_iv->pn = htonl(pn);
533}
534
535static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
536{
537 return (struct macsec_eth_header *)skb_mac_header(skb);
538}
539
540static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
541{
542 u32 pn;
543
544 spin_lock_bh(&tx_sa->lock);
545 pn = tx_sa->next_pn;
546
547 tx_sa->next_pn++;
548 if (tx_sa->next_pn == 0) {
549 pr_debug("PN wrapped, transitioning to !oper\n");
550 tx_sa->active = false;
551 if (secy->protect_frames)
552 secy->operational = false;
553 }
554 spin_unlock_bh(&tx_sa->lock);
555
556 return pn;
557}
558
559static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
560{
561 struct macsec_dev *macsec = netdev_priv(dev);
562
563 skb->dev = macsec->real_dev;
564 skb_reset_mac_header(skb);
565 skb->protocol = eth_hdr(skb)->h_proto;
566}
567
568static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
569 struct macsec_tx_sa *tx_sa)
570{
571 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
572
573 u64_stats_update_begin(&txsc_stats->syncp);
574 if (tx_sc->encrypt) {
575 txsc_stats->stats.OutOctetsEncrypted += skb->len;
576 txsc_stats->stats.OutPktsEncrypted++;
577 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
578 } else {
579 txsc_stats->stats.OutOctetsProtected += skb->len;
580 txsc_stats->stats.OutPktsProtected++;
581 this_cpu_inc(tx_sa->stats->OutPktsProtected);
582 }
583 u64_stats_update_end(&txsc_stats->syncp);
584}
585
586static void count_tx(struct net_device *dev, int ret, int len)
587{
588 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
589 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
590
591 u64_stats_update_begin(&stats->syncp);
592 stats->tx_packets++;
593 stats->tx_bytes += len;
594 u64_stats_update_end(&stats->syncp);
c09440f7
SD		 595 }
596}
597
598static void macsec_encrypt_done(struct crypto_async_request *base, int err)
599{
600 struct sk_buff *skb = base->data;
601 struct net_device *dev = skb->dev;
602 struct macsec_dev *macsec = macsec_priv(dev);
603 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
604 int len, ret;
605
606 aead_request_free(macsec_skb_cb(skb)->req);
607
608 rcu_read_lock_bh();
609 macsec_encrypt_finish(skb, dev);
610 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
611 len = skb->len;
612 ret = dev_queue_xmit(skb);
613 count_tx(dev, ret, len);
614 rcu_read_unlock_bh();
615
616 macsec_txsa_put(sa);
617 dev_put(dev);
618}
619
5d9649b3
SD		 620static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
621 unsigned char **iv,
5294b830
JD		 622 struct scatterlist **sg,
623 int num_frags)
5d9649b3
SD		 624{
625 size_t size, iv_offset, sg_offset;
626 struct aead_request *req;
627 void *tmp;
628
629 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
630 iv_offset = size;
631 size += GCM_AES_IV_LEN;
632
633 size = ALIGN(size, __alignof__(struct scatterlist));
634 sg_offset = size;
5294b830 635 size += sizeof(struct scatterlist) * num_frags;
5d9649b3
SD		 636
637 tmp = kmalloc(size, GFP_ATOMIC);
638 if (!tmp)
639 return NULL;
640
641 *iv = (unsigned char *)(tmp + iv_offset);
642 *sg = (struct scatterlist *)(tmp + sg_offset);
643 req = tmp;
644
645 aead_request_set_tfm(req, tfm);
646
647 return req;
648}
649
c09440f7
SD		 650static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
651 struct net_device *dev)
652{
653 int ret;
5d9649b3 654 struct scatterlist *sg;
5294b830 655 struct sk_buff *trailer;
5d9649b3 656 unsigned char *iv;
c09440f7
SD		 657 struct ethhdr *eth;
658 struct macsec_eth_header *hh;
659 size_t unprotected_len;
660 struct aead_request *req;
661 struct macsec_secy *secy;
662 struct macsec_tx_sc *tx_sc;
663 struct macsec_tx_sa *tx_sa;
664 struct macsec_dev *macsec = macsec_priv(dev);
e0f841f5 665 bool sci_present;
c09440f7
SD		 666 u32 pn;
667
668 secy = &macsec->secy;
669 tx_sc = &secy->tx_sc;
670
671 /* 10.5.1 TX SA assignment */
672 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
673 if (!tx_sa) {
674 secy->operational = false;
675 kfree_skb(skb);
676 return ERR_PTR(-EINVAL);
677 }
678
679 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
680 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
681 struct sk_buff *nskb = skb_copy_expand(skb,
682 MACSEC_NEEDED_HEADROOM,
683 MACSEC_NEEDED_TAILROOM,
684 GFP_ATOMIC);
685 if (likely(nskb)) {
686 consume_skb(skb);
687 skb = nskb;
688 } else {
689 macsec_txsa_put(tx_sa);
690 kfree_skb(skb);
691 return ERR_PTR(-ENOMEM);
692 }
693 } else {
694 skb = skb_unshare(skb, GFP_ATOMIC);
695 if (!skb) {
696 macsec_txsa_put(tx_sa);
697 return ERR_PTR(-ENOMEM);
698 }
699 }
700
701 unprotected_len = skb->len;
702 eth = eth_hdr(skb);
e0f841f5 703 sci_present = send_sci(secy);
d58ff351 704 hh = skb_push(skb, macsec_extra_len(sci_present));
c09440f7
SD		 705 memmove(hh, eth, 2 * ETH_ALEN);
706
707 pn = tx_sa_update_pn(tx_sa, secy);
708 if (pn == 0) {
709 macsec_txsa_put(tx_sa);
710 kfree_skb(skb);
711 return ERR_PTR(-ENOLINK);
712 }
e0f841f5 713 macsec_fill_sectag(hh, secy, pn, sci_present);
c09440f7
SD		 714 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
715
c09440f7
SD		 716 skb_put(skb, secy->icv_len);
717
718 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
719 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
720
721 u64_stats_update_begin(&secy_stats->syncp);
722 secy_stats->stats.OutPktsTooLong++;
723 u64_stats_update_end(&secy_stats->syncp);
724
725 macsec_txsa_put(tx_sa);
726 kfree_skb(skb);
727 return ERR_PTR(-EINVAL);
728 }
729
5294b830
JD		 730 ret = skb_cow_data(skb, 0, &trailer);
731 if (unlikely(ret < 0)) {
732 macsec_txsa_put(tx_sa);
733 kfree_skb(skb);
734 return ERR_PTR(ret);
735 }
736
737 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 738 if (!req) {
739 macsec_txsa_put(tx_sa);
740 kfree_skb(skb);
741 return ERR_PTR(-ENOMEM);
742 }
743
5d9649b3
SD		 744 macsec_fill_iv(iv, secy->sci, pn);
745
5294b830 746 sg_init_table(sg, ret);
cda7ea69
JD		 747 ret = skb_to_sgvec(skb, sg, 0, skb->len);
748 if (unlikely(ret < 0)) {
5aba2ba5 749 aead_request_free(req);
cda7ea69
JD		 750 macsec_txsa_put(tx_sa);
751 kfree_skb(skb);
752 return ERR_PTR(ret);
753 }
c09440f7
SD		 754
755 if (tx_sc->encrypt) {
e0f841f5 756 int len = skb->len - macsec_hdr_len(sci_present) -
c09440f7
SD		 757 secy->icv_len;
758 aead_request_set_crypt(req, sg, sg, len, iv);
e0f841f5 759 aead_request_set_ad(req, macsec_hdr_len(sci_present));
c09440f7
SD		 760 } else {
761 aead_request_set_crypt(req, sg, sg, 0, iv);
762 aead_request_set_ad(req, skb->len - secy->icv_len);
763 }
764
765 macsec_skb_cb(skb)->req = req;
766 macsec_skb_cb(skb)->tx_sa = tx_sa;
767 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
768
769 dev_hold(skb->dev);
770 ret = crypto_aead_encrypt(req);
771 if (ret == -EINPROGRESS) {
772 return ERR_PTR(ret);
773 } else if (ret != 0) {
774 dev_put(skb->dev);
775 kfree_skb(skb);
776 aead_request_free(req);
777 macsec_txsa_put(tx_sa);
778 return ERR_PTR(-EINVAL);
779 }
780
781 dev_put(skb->dev);
782 aead_request_free(req);
783 macsec_txsa_put(tx_sa);
784
785 return skb;
786}
787
788static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
789{
790 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
791 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
792 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
793 u32 lowest_pn = 0;
794
795 spin_lock(&rx_sa->lock);
796 if (rx_sa->next_pn >= secy->replay_window)
797 lowest_pn = rx_sa->next_pn - secy->replay_window;
798
799 /* Now perform replay protection check again
800 * (see IEEE 802.1AE-2006 figure 10-5)
801 */
802 if (secy->replay_protect && pn < lowest_pn) {
803 spin_unlock(&rx_sa->lock);
804 u64_stats_update_begin(&rxsc_stats->syncp);
805 rxsc_stats->stats.InPktsLate++;
806 u64_stats_update_end(&rxsc_stats->syncp);
807 return false;
808 }
809
810 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
811 u64_stats_update_begin(&rxsc_stats->syncp);
812 if (hdr->tci_an & MACSEC_TCI_E)
813 rxsc_stats->stats.InOctetsDecrypted += skb->len;
814 else
815 rxsc_stats->stats.InOctetsValidated += skb->len;
816 u64_stats_update_end(&rxsc_stats->syncp);
817 }
818
819 if (!macsec_skb_cb(skb)->valid) {
820 spin_unlock(&rx_sa->lock);
821
822 /* 10.6.5 */
823 if (hdr->tci_an & MACSEC_TCI_C ||
824 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
825 u64_stats_update_begin(&rxsc_stats->syncp);
826 rxsc_stats->stats.InPktsNotValid++;
827 u64_stats_update_end(&rxsc_stats->syncp);
828 return false;
829 }
830
831 u64_stats_update_begin(&rxsc_stats->syncp);
832 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
833 rxsc_stats->stats.InPktsInvalid++;
834 this_cpu_inc(rx_sa->stats->InPktsInvalid);
835 } else if (pn < lowest_pn) {
836 rxsc_stats->stats.InPktsDelayed++;
837 } else {
838 rxsc_stats->stats.InPktsUnchecked++;
839 }
840 u64_stats_update_end(&rxsc_stats->syncp);
841 } else {
842 u64_stats_update_begin(&rxsc_stats->syncp);
843 if (pn < lowest_pn) {
844 rxsc_stats->stats.InPktsDelayed++;
845 } else {
846 rxsc_stats->stats.InPktsOK++;
847 this_cpu_inc(rx_sa->stats->InPktsOK);
848 }
849 u64_stats_update_end(&rxsc_stats->syncp);
850
851 if (pn >= rx_sa->next_pn)
852 rx_sa->next_pn = pn + 1;
853 spin_unlock(&rx_sa->lock);
854 }
855
856 return true;
857}
858
859static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
860{
861 skb->pkt_type = PACKET_HOST;
862 skb->protocol = eth_type_trans(skb, dev);
863
864 skb_reset_network_header(skb);
865 if (!skb_transport_header_was_set(skb))
866 skb_reset_transport_header(skb);
867 skb_reset_mac_len(skb);
868}
869
870static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
871{
872 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
873 skb_pull(skb, hdr_len);
874 pskb_trim_unique(skb, skb->len - icv_len);
875}
876
877static void count_rx(struct net_device *dev, int len)
878{
879 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
880
881 u64_stats_update_begin(&stats->syncp);
882 stats->rx_packets++;
883 stats->rx_bytes += len;
884 u64_stats_update_end(&stats->syncp);
885}
886
887static void macsec_decrypt_done(struct crypto_async_request *base, int err)
888{
889 struct sk_buff *skb = base->data;
890 struct net_device *dev = skb->dev;
891 struct macsec_dev *macsec = macsec_priv(dev);
892 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
c78ebe1d 893 struct macsec_rx_sc *rx_sc = rx_sa->sc;
863483c9 894 int len;
c09440f7
SD		 895 u32 pn;
896
897 aead_request_free(macsec_skb_cb(skb)->req);
898
b3bdc3ac
LR		 899 if (!err)
900 macsec_skb_cb(skb)->valid = true;
901
c09440f7
SD		 902 rcu_read_lock_bh();
903 pn = ntohl(macsec_ethhdr(skb)->packet_number);
904 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
905 rcu_read_unlock_bh();
906 kfree_skb(skb);
907 goto out;
908 }
909
910 macsec_finalize_skb(skb, macsec->secy.icv_len,
911 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
912 macsec_reset_skb(skb, macsec->secy.netdev);
913
914 len = skb->len;
863483c9 915 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
c09440f7 916 count_rx(dev, len);
c09440f7
SD		 917
918 rcu_read_unlock_bh();
919
920out:
921 macsec_rxsa_put(rx_sa);
c78ebe1d 922 macsec_rxsc_put(rx_sc);
c09440f7 923 dev_put(dev);
c09440f7
SD		 924}
925
926static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
927 struct net_device *dev,
928 struct macsec_rx_sa *rx_sa,
929 sci_t sci,
930 struct macsec_secy *secy)
931{
932 int ret;
5d9649b3 933 struct scatterlist *sg;
5294b830 934 struct sk_buff *trailer;
5d9649b3 935 unsigned char *iv;
c09440f7
SD		 936 struct aead_request *req;
937 struct macsec_eth_header *hdr;
938 u16 icv_len = secy->icv_len;
939
940 macsec_skb_cb(skb)->valid = false;
941 skb = skb_share_check(skb, GFP_ATOMIC);
942 if (!skb)
c3b7d0bd 943 return ERR_PTR(-ENOMEM);
c09440f7 944
5294b830
JD		 945 ret = skb_cow_data(skb, 0, &trailer);
946 if (unlikely(ret < 0)) {
947 kfree_skb(skb);
948 return ERR_PTR(ret);
949 }
950 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 951 if (!req) {
952 kfree_skb(skb);
c3b7d0bd 953 return ERR_PTR(-ENOMEM);
c09440f7
SD		 954 }
955
956 hdr = (struct macsec_eth_header *)skb->data;
957 macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
958
5294b830 959 sg_init_table(sg, ret);
cda7ea69
JD		 960 ret = skb_to_sgvec(skb, sg, 0, skb->len);
961 if (unlikely(ret < 0)) {
5aba2ba5 962 aead_request_free(req);
cda7ea69
JD		 963 kfree_skb(skb);
964 return ERR_PTR(ret);
965 }
c09440f7
SD		 966
967 if (hdr->tci_an & MACSEC_TCI_E) {
968 /* confidentiality: ethernet + macsec header
969 * authenticated, encrypted payload
970 */
971 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
972
973 aead_request_set_crypt(req, sg, sg, len, iv);
974 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
975 skb = skb_unshare(skb, GFP_ATOMIC);
976 if (!skb) {
977 aead_request_free(req);
c3b7d0bd 978 return ERR_PTR(-ENOMEM);
c09440f7
SD		 979 }
980 } else {
981 /* integrity only: all headers + data authenticated */
982 aead_request_set_crypt(req, sg, sg, icv_len, iv);
983 aead_request_set_ad(req, skb->len - icv_len);
984 }
985
986 macsec_skb_cb(skb)->req = req;
c09440f7
SD		 987 skb->dev = dev;
988 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
989
990 dev_hold(dev);
991 ret = crypto_aead_decrypt(req);
992 if (ret == -EINPROGRESS) {
c3b7d0bd 993 return ERR_PTR(ret);
c09440f7
SD		 994 } else if (ret != 0) {
995 /* decryption/authentication failed
996 * 10.6 if validateFrames is disabled, deliver anyway
997 */
998 if (ret != -EBADMSG) {
999 kfree_skb(skb);
c3b7d0bd 1000 skb = ERR_PTR(ret);
c09440f7
SD		 1001 }
1002 } else {
1003 macsec_skb_cb(skb)->valid = true;
1004 }
1005 dev_put(dev);
1006
1007 aead_request_free(req);
1008
1009 return skb;
1010}
1011
1012static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
1013{
1014 struct macsec_rx_sc *rx_sc;
1015
1016 for_each_rxsc(secy, rx_sc) {
1017 if (rx_sc->sci == sci)
1018 return rx_sc;
1019 }
1020
1021 return NULL;
1022}
1023
1024static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
1025{
1026 struct macsec_rx_sc *rx_sc;
1027
1028 for_each_rxsc_rtnl(secy, rx_sc) {
1029 if (rx_sc->sci == sci)
1030 return rx_sc;
1031 }
1032
1033 return NULL;
1034}
1035
1036static void handle_not_macsec(struct sk_buff *skb)
1037{
1038 struct macsec_rxh_data *rxd;
1039 struct macsec_dev *macsec;
1040
1041 rcu_read_lock();
1042 rxd = macsec_data_rcu(skb->dev);
1043
1044 /* 10.6 If the management control validateFrames is not
1045 * Strict, frames without a SecTAG are received, counted, and
1046 * delivered to the Controlled Port
1047 */
1048 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1049 struct sk_buff *nskb;
c09440f7
SD		 1050 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1051
1052 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1053 u64_stats_update_begin(&secy_stats->syncp);
1054 secy_stats->stats.InPktsNoTag++;
1055 u64_stats_update_end(&secy_stats->syncp);
1056 continue;
1057 }
1058
1059 /* deliver on this port */
1060 nskb = skb_clone(skb, GFP_ATOMIC);
1061 if (!nskb)
1062 break;
1063
1064 nskb->dev = macsec->secy.netdev;
1065
863483c9 1066 if (netif_rx(nskb) == NET_RX_SUCCESS) {
c09440f7
SD		 1067 u64_stats_update_begin(&secy_stats->syncp);
1068 secy_stats->stats.InPktsUntagged++;
1069 u64_stats_update_end(&secy_stats->syncp);
c09440f7
SD		 1070 }
1071 }
1072
1073 rcu_read_unlock();
1074}
1075
1076static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1077{
1078 struct sk_buff *skb = *pskb;
1079 struct net_device *dev = skb->dev;
1080 struct macsec_eth_header *hdr;
1081 struct macsec_secy *secy = NULL;
1082 struct macsec_rx_sc *rx_sc;
1083 struct macsec_rx_sa *rx_sa;
1084 struct macsec_rxh_data *rxd;
1085 struct macsec_dev *macsec;
1086 sci_t sci;
1087 u32 pn;
1088 bool cbit;
1089 struct pcpu_rx_sc_stats *rxsc_stats;
1090 struct pcpu_secy_stats *secy_stats;
1091 bool pulled_sci;
5491e7c6 1092 int ret;
c09440f7
SD		 1093
1094 if (skb_headroom(skb) < ETH_HLEN)
1095 goto drop_direct;
1096
1097 hdr = macsec_ethhdr(skb);
1098 if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
1099 handle_not_macsec(skb);
1100
1101 /* and deliver to the uncontrolled port */
1102 return RX_HANDLER_PASS;
1103 }
1104
1105 skb = skb_unshare(skb, GFP_ATOMIC);
1106 if (!skb) {
1107 *pskb = NULL;
1108 return RX_HANDLER_CONSUMED;
1109 }
1110
1111 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1112 if (!pulled_sci) {
1113 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1114 goto drop_direct;
1115 }
1116
1117 hdr = macsec_ethhdr(skb);
1118
1119 /* Frames with a SecTAG that has the TCI E bit set but the C
1120 * bit clear are discarded, as this reserved encoding is used
1121 * to identify frames with a SecTAG that are not to be
1122 * delivered to the Controlled Port.
1123 */
1124 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1125 return RX_HANDLER_PASS;
1126
1127 /* now, pull the extra length */
1128 if (hdr->tci_an & MACSEC_TCI_SC) {
1129 if (!pulled_sci)
1130 goto drop_direct;
1131 }
1132
1133 /* ethernet header is part of crypto processing */
1134 skb_push(skb, ETH_HLEN);
1135
1136 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1137 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1138 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1139
1140 rcu_read_lock();
1141 rxd = macsec_data_rcu(skb->dev);
1142
1143 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1144 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
7979472b 1145
c78ebe1d 1146 sc = sc ? macsec_rxsc_get(sc) : NULL;
c09440f7
SD		 1147
1148 if (sc) {
1149 secy = &macsec->secy;
1150 rx_sc = sc;
1151 break;
1152 }
1153 }
1154
1155 if (!secy)
1156 goto nosci;
1157
1158 dev = secy->netdev;
1159 macsec = macsec_priv(dev);
1160 secy_stats = this_cpu_ptr(macsec->stats);
1161 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1162
1163 if (!macsec_validate_skb(skb, secy->icv_len)) {
1164 u64_stats_update_begin(&secy_stats->syncp);
1165 secy_stats->stats.InPktsBadTag++;
1166 u64_stats_update_end(&secy_stats->syncp);
1167 goto drop_nosa;
1168 }
1169
1170 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1171 if (!rx_sa) {
1172 /* 10.6.1 if the SA is not in use */
1173
1174 /* If validateFrames is Strict or the C bit in the
1175 * SecTAG is set, discard
1176 */
1177 if (hdr->tci_an & MACSEC_TCI_C ||
1178 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1179 u64_stats_update_begin(&rxsc_stats->syncp);
1180 rxsc_stats->stats.InPktsNotUsingSA++;
1181 u64_stats_update_end(&rxsc_stats->syncp);
1182 goto drop_nosa;
1183 }
1184
1185 /* not Strict, the frame (with the SecTAG and ICV
1186 * removed) is delivered to the Controlled Port.
1187 */
1188 u64_stats_update_begin(&rxsc_stats->syncp);
1189 rxsc_stats->stats.InPktsUnusedSA++;
1190 u64_stats_update_end(&rxsc_stats->syncp);
1191 goto deliver;
1192 }
1193
1194 /* First, PN check to avoid decrypting obviously wrong packets */
1195 pn = ntohl(hdr->packet_number);
1196 if (secy->replay_protect) {
1197 bool late;
1198
1199 spin_lock(&rx_sa->lock);
1200 late = rx_sa->next_pn >= secy->replay_window &&
1201 pn < (rx_sa->next_pn - secy->replay_window);
1202 spin_unlock(&rx_sa->lock);
1203
1204 if (late) {
1205 u64_stats_update_begin(&rxsc_stats->syncp);
1206 rxsc_stats->stats.InPktsLate++;
1207 u64_stats_update_end(&rxsc_stats->syncp);
1208 goto drop;
1209 }
1210 }
1211
e3a3b626
BG		 1212 macsec_skb_cb(skb)->rx_sa = rx_sa;
1213
c09440f7
SD		 1214 /* Disabled && !changed text => skip validation */
1215 if (hdr->tci_an & MACSEC_TCI_C ||
1216 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1217 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1218
c3b7d0bd
SD		 1219 if (IS_ERR(skb)) {
1220 /* the decrypt callback needs the reference */
c78ebe1d 1221 if (PTR_ERR(skb) != -EINPROGRESS) {
c3b7d0bd 1222 macsec_rxsa_put(rx_sa);
c78ebe1d
SD		 1223 macsec_rxsc_put(rx_sc);
1224 }
c09440f7
SD		 1225 rcu_read_unlock();
1226 *pskb = NULL;
1227 return RX_HANDLER_CONSUMED;
1228 }
1229
1230 if (!macsec_post_decrypt(skb, secy, pn))
1231 goto drop;
1232
1233deliver:
1234 macsec_finalize_skb(skb, secy->icv_len,
1235 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1236 macsec_reset_skb(skb, secy->netdev);
1237
497f358a
SD		 1238 if (rx_sa)
1239 macsec_rxsa_put(rx_sa);
c78ebe1d 1240 macsec_rxsc_put(rx_sc);
5491e7c6
PA		 1241
1242 ret = gro_cells_receive(&macsec->gro_cells, skb);
1243 if (ret == NET_RX_SUCCESS)
1244 count_rx(dev, skb->len);
1245 else
1246 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1247
1248 rcu_read_unlock();
1249
5491e7c6
PA		 1250 *pskb = NULL;
1251 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1252
1253drop:
1254 macsec_rxsa_put(rx_sa);
1255drop_nosa:
c78ebe1d 1256 macsec_rxsc_put(rx_sc);
c09440f7
SD		 1257 rcu_read_unlock();
1258drop_direct:
1259 kfree_skb(skb);
1260 *pskb = NULL;
1261 return RX_HANDLER_CONSUMED;
1262
1263nosci:
1264 /* 10.6.1 if the SC is not found */
1265 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1266 if (!cbit)
1267 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1268 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1269
1270 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1271 struct sk_buff *nskb;
c09440f7
SD		 1272
1273 secy_stats = this_cpu_ptr(macsec->stats);
1274
1275 /* If validateFrames is Strict or the C bit in the
1276 * SecTAG is set, discard
1277 */
1278 if (cbit ||
1279 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1280 u64_stats_update_begin(&secy_stats->syncp);
1281 secy_stats->stats.InPktsNoSCI++;
1282 u64_stats_update_end(&secy_stats->syncp);
1283 continue;
1284 }
1285
1286 /* not strict, the frame (with the SecTAG and ICV
1287 * removed) is delivered to the Controlled Port.
1288 */
1289 nskb = skb_clone(skb, GFP_ATOMIC);
1290 if (!nskb)
1291 break;
1292
1293 macsec_reset_skb(nskb, macsec->secy.netdev);
1294
1295 ret = netif_rx(nskb);
1296 if (ret == NET_RX_SUCCESS) {
1297 u64_stats_update_begin(&secy_stats->syncp);
1298 secy_stats->stats.InPktsUnknownSCI++;
1299 u64_stats_update_end(&secy_stats->syncp);
1300 } else {
1301 macsec->secy.netdev->stats.rx_dropped++;
1302 }
1303 }
1304
1305 rcu_read_unlock();
1306 *pskb = skb;
1307 return RX_HANDLER_PASS;
1308}
1309
1310static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1311{
1312 struct crypto_aead *tfm;
1313 int ret;
1314
6052f7fb 1315 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
34aedfee
DC		 1316
1317 if (IS_ERR(tfm))
1318 return tfm;
c09440f7
SD		 1319
1320 ret = crypto_aead_setkey(tfm, key, key_len);
34aedfee
DC		 1321 if (ret < 0)
1322 goto fail;
c09440f7
SD		 1323
1324 ret = crypto_aead_setauthsize(tfm, icv_len);
34aedfee
DC		 1325 if (ret < 0)
1326 goto fail;
c09440f7
SD		 1327
1328 return tfm;
34aedfee
DC		 1329fail:
1330 crypto_free_aead(tfm);
1331 return ERR_PTR(ret);
c09440f7
SD		 1332}
1333
1334static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1335 int icv_len)
1336{
1337 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1338 if (!rx_sa->stats)
34aedfee 1339 return -ENOMEM;
c09440f7
SD		 1340
1341 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1342 if (IS_ERR(rx_sa->key.tfm)) {
c09440f7 1343 free_percpu(rx_sa->stats);
34aedfee 1344 return PTR_ERR(rx_sa->key.tfm);
c09440f7
SD		 1345 }
1346
1347 rx_sa->active = false;
1348 rx_sa->next_pn = 1;
e187246f 1349 refcount_set(&rx_sa->refcnt, 1);
c09440f7
SD		 1350 spin_lock_init(&rx_sa->lock);
1351
1352 return 0;
1353}
1354
1355static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1356{
1357 rx_sa->active = false;
1358
1359 macsec_rxsa_put(rx_sa);
1360}
1361
1362static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1363{
1364 int i;
1365
1366 for (i = 0; i < MACSEC_NUM_AN; i++) {
1367 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1368
1369 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1370 if (sa)
1371 clear_rx_sa(sa);
1372 }
1373
1374 macsec_rxsc_put(rx_sc);
1375}
1376
1377static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1378{
1379 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1380
1381 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1382 rx_sc;
1383 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1384 if (rx_sc->sci == sci) {
1385 if (rx_sc->active)
1386 secy->n_rx_sc--;
1387 rcu_assign_pointer(*rx_scp, rx_sc->next);
1388 return rx_sc;
1389 }
1390 }
1391
1392 return NULL;
1393}
1394
1395static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1396{
1397 struct macsec_rx_sc *rx_sc;
1398 struct macsec_dev *macsec;
1399 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1400 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1401 struct macsec_secy *secy;
1402
1403 list_for_each_entry(macsec, &rxd->secys, secys) {
1404 if (find_rx_sc_rtnl(&macsec->secy, sci))
1405 return ERR_PTR(-EEXIST);
1406 }
1407
1408 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1409 if (!rx_sc)
1410 return ERR_PTR(-ENOMEM);
1411
1412 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1413 if (!rx_sc->stats) {
1414 kfree(rx_sc);
1415 return ERR_PTR(-ENOMEM);
1416 }
1417
1418 rx_sc->sci = sci;
1419 rx_sc->active = true;
8676d76f 1420 refcount_set(&rx_sc->refcnt, 1);
c09440f7
SD		 1421
1422 secy = &macsec_priv(dev)->secy;
1423 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1424 rcu_assign_pointer(secy->rx_sc, rx_sc);
1425
1426 if (rx_sc->active)
1427 secy->n_rx_sc++;
1428
1429 return rx_sc;
1430}
1431
1432static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1433 int icv_len)
1434{
1435 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1436 if (!tx_sa->stats)
34aedfee 1437 return -ENOMEM;
c09440f7
SD		 1438
1439 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1440 if (IS_ERR(tx_sa->key.tfm)) {
c09440f7 1441 free_percpu(tx_sa->stats);
34aedfee 1442 return PTR_ERR(tx_sa->key.tfm);
c09440f7
SD		 1443 }
1444
1445 tx_sa->active = false;
28206cdb 1446 refcount_set(&tx_sa->refcnt, 1);
c09440f7
SD		 1447 spin_lock_init(&tx_sa->lock);
1448
1449 return 0;
1450}
1451
1452static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1453{
1454 tx_sa->active = false;
1455
1456 macsec_txsa_put(tx_sa);
1457}
1458
489111e5 1459static struct genl_family macsec_fam;
c09440f7
SD		 1460
1461static struct net_device *get_dev_from_nl(struct net *net,
1462 struct nlattr **attrs)
1463{
1464 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1465 struct net_device *dev;
1466
1467 dev = __dev_get_by_index(net, ifindex);
1468 if (!dev)
1469 return ERR_PTR(-ENODEV);
1470
1471 if (!netif_is_macsec(dev))
1472 return ERR_PTR(-ENODEV);
1473
1474 return dev;
1475}
1476
1477static sci_t nla_get_sci(const struct nlattr *nla)
1478{
1479 return (__force sci_t)nla_get_u64(nla);
1480}
1481
f60d94c0
ND		 1482static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1483 int padattr)
c09440f7 1484{
f60d94c0 1485 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
c09440f7
SD		 1486}
1487
1488static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1489 struct nlattr **attrs,
1490 struct nlattr **tb_sa,
1491 struct net_device **devp,
1492 struct macsec_secy **secyp,
1493 struct macsec_tx_sc **scp,
1494 u8 *assoc_num)
1495{
1496 struct net_device *dev;
1497 struct macsec_secy *secy;
1498 struct macsec_tx_sc *tx_sc;
1499 struct macsec_tx_sa *tx_sa;
1500
1501 if (!tb_sa[MACSEC_SA_ATTR_AN])
1502 return ERR_PTR(-EINVAL);
1503
1504 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1505
1506 dev = get_dev_from_nl(net, attrs);
1507 if (IS_ERR(dev))
1508 return ERR_CAST(dev);
1509
1510 if (*assoc_num >= MACSEC_NUM_AN)
1511 return ERR_PTR(-EINVAL);
1512
1513 secy = &macsec_priv(dev)->secy;
1514 tx_sc = &secy->tx_sc;
1515
1516 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1517 if (!tx_sa)
1518 return ERR_PTR(-ENODEV);
1519
1520 *devp = dev;
1521 *scp = tx_sc;
1522 *secyp = secy;
1523 return tx_sa;
1524}
1525
1526static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1527 struct nlattr **attrs,
1528 struct nlattr **tb_rxsc,
1529 struct net_device **devp,
1530 struct macsec_secy **secyp)
1531{
1532 struct net_device *dev;
1533 struct macsec_secy *secy;
1534 struct macsec_rx_sc *rx_sc;
1535 sci_t sci;
1536
1537 dev = get_dev_from_nl(net, attrs);
1538 if (IS_ERR(dev))
1539 return ERR_CAST(dev);
1540
1541 secy = &macsec_priv(dev)->secy;
1542
1543 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1544 return ERR_PTR(-EINVAL);
1545
1546 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1547 rx_sc = find_rx_sc_rtnl(secy, sci);
1548 if (!rx_sc)
1549 return ERR_PTR(-ENODEV);
1550
1551 *secyp = secy;
1552 *devp = dev;
1553
1554 return rx_sc;
1555}
1556
1557static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1558 struct nlattr **attrs,
1559 struct nlattr **tb_rxsc,
1560 struct nlattr **tb_sa,
1561 struct net_device **devp,
1562 struct macsec_secy **secyp,
1563 struct macsec_rx_sc **scp,
1564 u8 *assoc_num)
1565{
1566 struct macsec_rx_sc *rx_sc;
1567 struct macsec_rx_sa *rx_sa;
1568
1569 if (!tb_sa[MACSEC_SA_ATTR_AN])
1570 return ERR_PTR(-EINVAL);
1571
1572 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1573 if (*assoc_num >= MACSEC_NUM_AN)
1574 return ERR_PTR(-EINVAL);
1575
1576 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1577 if (IS_ERR(rx_sc))
1578 return ERR_CAST(rx_sc);
1579
1580 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1581 if (!rx_sa)
1582 return ERR_PTR(-ENODEV);
1583
1584 *scp = rx_sc;
1585 return rx_sa;
1586}
1587
c09440f7
SD		 1588static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1589 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1590 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1591 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1592};
1593
1594static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1595 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1596 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1597};
1598
1599static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1600 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1601 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1602 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
8acca6ac
SD		 1603 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1604 .len = MACSEC_KEYID_LEN, },
c09440f7 1605 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
e8660ded 1606 .len = MACSEC_MAX_KEY_LEN, },
c09440f7
SD		 1607};
1608
1609static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1610{
1611 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1612 return -EINVAL;
1613
fceb6435
JB		 1614 if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX,
1615 attrs[MACSEC_ATTR_SA_CONFIG],
1616 macsec_genl_sa_policy, NULL))
c09440f7
SD		 1617 return -EINVAL;
1618
1619 return 0;
1620}
1621
1622static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1623{
1624 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1625 return -EINVAL;
1626
fceb6435
JB		 1627 if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX,
1628 attrs[MACSEC_ATTR_RXSC_CONFIG],
1629 macsec_genl_rxsc_policy, NULL))
c09440f7
SD		 1630 return -EINVAL;
1631
1632 return 0;
1633}
1634
1635static bool validate_add_rxsa(struct nlattr **attrs)
1636{
1637 if (!attrs[MACSEC_SA_ATTR_AN] ||
1638 !attrs[MACSEC_SA_ATTR_KEY] ||
1639 !attrs[MACSEC_SA_ATTR_KEYID])
1640 return false;
1641
1642 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1643 return false;
1644
1645 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1646 return false;
1647
1648 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1649 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1650 return false;
1651 }
1652
8acca6ac
SD		 1653 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1654 return false;
1655
c09440f7
SD		 1656 return true;
1657}
1658
1659static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1660{
1661 struct net_device *dev;
1662 struct nlattr **attrs = info->attrs;
1663 struct macsec_secy *secy;
1664 struct macsec_rx_sc *rx_sc;
1665 struct macsec_rx_sa *rx_sa;
1666 unsigned char assoc_num;
1667 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1668 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1669 int err;
c09440f7
SD		 1670
1671 if (!attrs[MACSEC_ATTR_IFINDEX])
1672 return -EINVAL;
1673
1674 if (parse_sa_config(attrs, tb_sa))
1675 return -EINVAL;
1676
1677 if (parse_rxsc_config(attrs, tb_rxsc))
1678 return -EINVAL;
1679
1680 if (!validate_add_rxsa(tb_sa))
1681 return -EINVAL;
1682
1683 rtnl_lock();
1684 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
36b232c8 1685 if (IS_ERR(rx_sc)) {
c09440f7
SD		 1686 rtnl_unlock();
1687 return PTR_ERR(rx_sc);
1688 }
1689
1690 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1691
1692 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1693 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1694 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1695 rtnl_unlock();
1696 return -EINVAL;
1697 }
1698
1699 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1700 if (rx_sa) {
1701 rtnl_unlock();
1702 return -EBUSY;
1703 }
1704
1705 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
34aedfee 1706 if (!rx_sa) {
c09440f7
SD		 1707 rtnl_unlock();
1708 return -ENOMEM;
1709 }
1710
34aedfee
DC		 1711 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1712 secy->key_len, secy->icv_len);
1713 if (err < 0) {
1714 kfree(rx_sa);
1715 rtnl_unlock();
1716 return err;
1717 }
1718
c09440f7
SD		 1719 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1720 spin_lock_bh(&rx_sa->lock);
1721 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1722 spin_unlock_bh(&rx_sa->lock);
1723 }
1724
1725 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1726 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1727
1968a0b8 1728 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1729 rx_sa->sc = rx_sc;
1730 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1731
1732 rtnl_unlock();
1733
1734 return 0;
1735}
1736
1737static bool validate_add_rxsc(struct nlattr **attrs)
1738{
1739 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1740 return false;
1741
1742 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1743 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1744 return false;
1745 }
1746
1747 return true;
1748}
1749
1750static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1751{
1752 struct net_device *dev;
1753 sci_t sci = MACSEC_UNDEF_SCI;
1754 struct nlattr **attrs = info->attrs;
1755 struct macsec_rx_sc *rx_sc;
1756 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1757
1758 if (!attrs[MACSEC_ATTR_IFINDEX])
1759 return -EINVAL;
1760
1761 if (parse_rxsc_config(attrs, tb_rxsc))
1762 return -EINVAL;
1763
1764 if (!validate_add_rxsc(tb_rxsc))
1765 return -EINVAL;
1766
1767 rtnl_lock();
1768 dev = get_dev_from_nl(genl_info_net(info), attrs);
1769 if (IS_ERR(dev)) {
1770 rtnl_unlock();
1771 return PTR_ERR(dev);
1772 }
1773
1774 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1775
1776 rx_sc = create_rx_sc(dev, sci);
1777 if (IS_ERR(rx_sc)) {
1778 rtnl_unlock();
1779 return PTR_ERR(rx_sc);
1780 }
1781
1782 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1783 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1784
1785 rtnl_unlock();
1786
1787 return 0;
1788}
1789
1790static bool validate_add_txsa(struct nlattr **attrs)
1791{
1792 if (!attrs[MACSEC_SA_ATTR_AN] ||
1793 !attrs[MACSEC_SA_ATTR_PN] ||
1794 !attrs[MACSEC_SA_ATTR_KEY] ||
1795 !attrs[MACSEC_SA_ATTR_KEYID])
1796 return false;
1797
1798 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1799 return false;
1800
1801 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1802 return false;
1803
1804 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1805 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1806 return false;
1807 }
1808
8acca6ac
SD		 1809 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1810 return false;
1811
c09440f7
SD		 1812 return true;
1813}
1814
1815static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1816{
1817 struct net_device *dev;
1818 struct nlattr **attrs = info->attrs;
1819 struct macsec_secy *secy;
1820 struct macsec_tx_sc *tx_sc;
1821 struct macsec_tx_sa *tx_sa;
1822 unsigned char assoc_num;
1823 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1824 int err;
c09440f7
SD		 1825
1826 if (!attrs[MACSEC_ATTR_IFINDEX])
1827 return -EINVAL;
1828
1829 if (parse_sa_config(attrs, tb_sa))
1830 return -EINVAL;
1831
1832 if (!validate_add_txsa(tb_sa))
1833 return -EINVAL;
1834
1835 rtnl_lock();
1836 dev = get_dev_from_nl(genl_info_net(info), attrs);
1837 if (IS_ERR(dev)) {
1838 rtnl_unlock();
1839 return PTR_ERR(dev);
1840 }
1841
1842 secy = &macsec_priv(dev)->secy;
1843 tx_sc = &secy->tx_sc;
1844
1845 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1846
1847 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1848 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1849 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1850 rtnl_unlock();
1851 return -EINVAL;
1852 }
1853
1854 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1855 if (tx_sa) {
1856 rtnl_unlock();
1857 return -EBUSY;
1858 }
1859
1860 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
34aedfee 1861 if (!tx_sa) {
c09440f7
SD		 1862 rtnl_unlock();
1863 return -ENOMEM;
1864 }
1865
34aedfee
DC		 1866 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1867 secy->key_len, secy->icv_len);
1868 if (err < 0) {
1869 kfree(tx_sa);
1870 rtnl_unlock();
1871 return err;
1872 }
1873
1968a0b8 1874 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1875
1876 spin_lock_bh(&tx_sa->lock);
1877 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
1878 spin_unlock_bh(&tx_sa->lock);
1879
1880 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1881 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1882
1883 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
1884 secy->operational = true;
1885
1886 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
1887
1888 rtnl_unlock();
1889
1890 return 0;
1891}
1892
1893static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
1894{
1895 struct nlattr **attrs = info->attrs;
1896 struct net_device *dev;
1897 struct macsec_secy *secy;
1898 struct macsec_rx_sc *rx_sc;
1899 struct macsec_rx_sa *rx_sa;
1900 u8 assoc_num;
1901 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1902 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1903
1904 if (!attrs[MACSEC_ATTR_IFINDEX])
1905 return -EINVAL;
1906
1907 if (parse_sa_config(attrs, tb_sa))
1908 return -EINVAL;
1909
1910 if (parse_rxsc_config(attrs, tb_rxsc))
1911 return -EINVAL;
1912
1913 rtnl_lock();
1914 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
1915 &dev, &secy, &rx_sc, &assoc_num);
1916 if (IS_ERR(rx_sa)) {
1917 rtnl_unlock();
1918 return PTR_ERR(rx_sa);
1919 }
1920
1921 if (rx_sa->active) {
1922 rtnl_unlock();
1923 return -EBUSY;
1924 }
1925
1926 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
1927 clear_rx_sa(rx_sa);
1928
1929 rtnl_unlock();
1930
1931 return 0;
1932}
1933
1934static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
1935{
1936 struct nlattr **attrs = info->attrs;
1937 struct net_device *dev;
1938 struct macsec_secy *secy;
1939 struct macsec_rx_sc *rx_sc;
1940 sci_t sci;
1941 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1942
1943 if (!attrs[MACSEC_ATTR_IFINDEX])
1944 return -EINVAL;
1945
1946 if (parse_rxsc_config(attrs, tb_rxsc))
1947 return -EINVAL;
1948
1949 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1950 return -EINVAL;
1951
1952 rtnl_lock();
1953 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
1954 if (IS_ERR(dev)) {
1955 rtnl_unlock();
1956 return PTR_ERR(dev);
1957 }
1958
1959 secy = &macsec_priv(dev)->secy;
1960 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1961
1962 rx_sc = del_rx_sc(secy, sci);
1963 if (!rx_sc) {
1964 rtnl_unlock();
1965 return -ENODEV;
1966 }
1967
1968 free_rx_sc(rx_sc);
1969 rtnl_unlock();
1970
1971 return 0;
1972}
1973
1974static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
1975{
1976 struct nlattr **attrs = info->attrs;
1977 struct net_device *dev;
1978 struct macsec_secy *secy;
1979 struct macsec_tx_sc *tx_sc;
1980 struct macsec_tx_sa *tx_sa;
1981 u8 assoc_num;
1982 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1983
1984 if (!attrs[MACSEC_ATTR_IFINDEX])
1985 return -EINVAL;
1986
1987 if (parse_sa_config(attrs, tb_sa))
1988 return -EINVAL;
1989
1990 rtnl_lock();
1991 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
1992 &dev, &secy, &tx_sc, &assoc_num);
1993 if (IS_ERR(tx_sa)) {
1994 rtnl_unlock();
1995 return PTR_ERR(tx_sa);
1996 }
1997
1998 if (tx_sa->active) {
1999 rtnl_unlock();
2000 return -EBUSY;
2001 }
2002
2003 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2004 clear_tx_sa(tx_sa);
2005
2006 rtnl_unlock();
2007
2008 return 0;
2009}
2010
2011static bool validate_upd_sa(struct nlattr **attrs)
2012{
2013 if (!attrs[MACSEC_SA_ATTR_AN] ||
2014 attrs[MACSEC_SA_ATTR_KEY] ||
2015 attrs[MACSEC_SA_ATTR_KEYID])
2016 return false;
2017
2018 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2019 return false;
2020
2021 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2022 return false;
2023
2024 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2025 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2026 return false;
2027 }
2028
2029 return true;
2030}
2031
2032static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2033{
2034 struct nlattr **attrs = info->attrs;
2035 struct net_device *dev;
2036 struct macsec_secy *secy;
2037 struct macsec_tx_sc *tx_sc;
2038 struct macsec_tx_sa *tx_sa;
2039 u8 assoc_num;
2040 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2041
2042 if (!attrs[MACSEC_ATTR_IFINDEX])
2043 return -EINVAL;
2044
2045 if (parse_sa_config(attrs, tb_sa))
2046 return -EINVAL;
2047
2048 if (!validate_upd_sa(tb_sa))
2049 return -EINVAL;
2050
2051 rtnl_lock();
2052 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2053 &dev, &secy, &tx_sc, &assoc_num);
2054 if (IS_ERR(tx_sa)) {
2055 rtnl_unlock();
2056 return PTR_ERR(tx_sa);
2057 }
2058
2059 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2060 spin_lock_bh(&tx_sa->lock);
2061 tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2062 spin_unlock_bh(&tx_sa->lock);
2063 }
2064
2065 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2066 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2067
2068 if (assoc_num == tx_sc->encoding_sa)
2069 secy->operational = tx_sa->active;
2070
2071 rtnl_unlock();
2072
2073 return 0;
2074}
2075
2076static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2077{
2078 struct nlattr **attrs = info->attrs;
2079 struct net_device *dev;
2080 struct macsec_secy *secy;
2081 struct macsec_rx_sc *rx_sc;
2082 struct macsec_rx_sa *rx_sa;
2083 u8 assoc_num;
2084 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2085 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2086
2087 if (!attrs[MACSEC_ATTR_IFINDEX])
2088 return -EINVAL;
2089
2090 if (parse_rxsc_config(attrs, tb_rxsc))
2091 return -EINVAL;
2092
2093 if (parse_sa_config(attrs, tb_sa))
2094 return -EINVAL;
2095
2096 if (!validate_upd_sa(tb_sa))
2097 return -EINVAL;
2098
2099 rtnl_lock();
2100 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2101 &dev, &secy, &rx_sc, &assoc_num);
2102 if (IS_ERR(rx_sa)) {
2103 rtnl_unlock();
2104 return PTR_ERR(rx_sa);
2105 }
2106
2107 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2108 spin_lock_bh(&rx_sa->lock);
2109 rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
2110 spin_unlock_bh(&rx_sa->lock);
2111 }
2112
2113 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2114 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2115
2116 rtnl_unlock();
2117 return 0;
2118}
2119
2120static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2121{
2122 struct nlattr **attrs = info->attrs;
2123 struct net_device *dev;
2124 struct macsec_secy *secy;
2125 struct macsec_rx_sc *rx_sc;
2126 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2127
2128 if (!attrs[MACSEC_ATTR_IFINDEX])
2129 return -EINVAL;
2130
2131 if (parse_rxsc_config(attrs, tb_rxsc))
2132 return -EINVAL;
2133
2134 if (!validate_add_rxsc(tb_rxsc))
2135 return -EINVAL;
2136
2137 rtnl_lock();
2138 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2139 if (IS_ERR(rx_sc)) {
2140 rtnl_unlock();
2141 return PTR_ERR(rx_sc);
2142 }
2143
2144 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2145 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2146
2147 if (rx_sc->active != new)
2148 secy->n_rx_sc += new ? 1 : -1;
2149
2150 rx_sc->active = new;
2151 }
2152
2153 rtnl_unlock();
2154
2155 return 0;
2156}
2157
2158static int copy_tx_sa_stats(struct sk_buff *skb,
7979472b 2159 struct macsec_tx_sa_stats __percpu *pstats)
c09440f7
SD		 2160{
2161 struct macsec_tx_sa_stats sum = {0, };
2162 int cpu;
2163
2164 for_each_possible_cpu(cpu) {
2165 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2166
2167 sum.OutPktsProtected += stats->OutPktsProtected;
2168 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2169 }
2170
2171 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2172 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2173 return -EMSGSIZE;
2174
2175 return 0;
2176}
2177
e1427237
FW		 2178static noinline_for_stack int
2179copy_rx_sa_stats(struct sk_buff *skb,
2180 struct macsec_rx_sa_stats __percpu *pstats)
c09440f7
SD		 2181{
2182 struct macsec_rx_sa_stats sum = {0, };
2183 int cpu;
2184
2185 for_each_possible_cpu(cpu) {
2186 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2187
2188 sum.InPktsOK += stats->InPktsOK;
2189 sum.InPktsInvalid += stats->InPktsInvalid;
2190 sum.InPktsNotValid += stats->InPktsNotValid;
2191 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2192 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2193 }
2194
2195 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2196 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2197 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2198 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2199 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2200 return -EMSGSIZE;
2201
2202 return 0;
2203}
2204
e1427237
FW		 2205static noinline_for_stack int
2206copy_rx_sc_stats(struct sk_buff *skb, struct pcpu_rx_sc_stats __percpu *pstats)
c09440f7
SD		 2207{
2208 struct macsec_rx_sc_stats sum = {0, };
2209 int cpu;
2210
2211 for_each_possible_cpu(cpu) {
2212 const struct pcpu_rx_sc_stats *stats;
2213 struct macsec_rx_sc_stats tmp;
2214 unsigned int start;
2215
2216 stats = per_cpu_ptr(pstats, cpu);
2217 do {
2218 start = u64_stats_fetch_begin_irq(&stats->syncp);
2219 memcpy(&tmp, &stats->stats, sizeof(tmp));
2220 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2221
2222 sum.InOctetsValidated += tmp.InOctetsValidated;
2223 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2224 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2225 sum.InPktsDelayed += tmp.InPktsDelayed;
2226 sum.InPktsOK += tmp.InPktsOK;
2227 sum.InPktsInvalid += tmp.InPktsInvalid;
2228 sum.InPktsLate += tmp.InPktsLate;
2229 sum.InPktsNotValid += tmp.InPktsNotValid;
2230 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2231 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2232 }
2233
f60d94c0
ND		 2234 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2235 sum.InOctetsValidated,
2236 MACSEC_RXSC_STATS_ATTR_PAD) ||
2237 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2238 sum.InOctetsDecrypted,
2239 MACSEC_RXSC_STATS_ATTR_PAD) ||
2240 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2241 sum.InPktsUnchecked,
2242 MACSEC_RXSC_STATS_ATTR_PAD) ||
2243 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2244 sum.InPktsDelayed,
2245 MACSEC_RXSC_STATS_ATTR_PAD) ||
2246 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2247 sum.InPktsOK,
2248 MACSEC_RXSC_STATS_ATTR_PAD) ||
2249 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2250 sum.InPktsInvalid,
2251 MACSEC_RXSC_STATS_ATTR_PAD) ||
2252 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2253 sum.InPktsLate,
2254 MACSEC_RXSC_STATS_ATTR_PAD) ||
2255 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2256 sum.InPktsNotValid,
2257 MACSEC_RXSC_STATS_ATTR_PAD) ||
2258 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2259 sum.InPktsNotUsingSA,
2260 MACSEC_RXSC_STATS_ATTR_PAD) ||
2261 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2262 sum.InPktsUnusedSA,
2263 MACSEC_RXSC_STATS_ATTR_PAD))
c09440f7
SD		 2264 return -EMSGSIZE;
2265
2266 return 0;
2267}
2268
e1427237
FW		 2269static noinline_for_stack int
2270copy_tx_sc_stats(struct sk_buff *skb, struct pcpu_tx_sc_stats __percpu *pstats)
c09440f7
SD		 2271{
2272 struct macsec_tx_sc_stats sum = {0, };
2273 int cpu;
2274
2275 for_each_possible_cpu(cpu) {
2276 const struct pcpu_tx_sc_stats *stats;
2277 struct macsec_tx_sc_stats tmp;
2278 unsigned int start;
2279
2280 stats = per_cpu_ptr(pstats, cpu);
2281 do {
2282 start = u64_stats_fetch_begin_irq(&stats->syncp);
2283 memcpy(&tmp, &stats->stats, sizeof(tmp));
2284 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2285
2286 sum.OutPktsProtected += tmp.OutPktsProtected;
2287 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2288 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2289 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2290 }
2291
f60d94c0
ND		 2292 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2293 sum.OutPktsProtected,
2294 MACSEC_TXSC_STATS_ATTR_PAD) ||
2295 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2296 sum.OutPktsEncrypted,
2297 MACSEC_TXSC_STATS_ATTR_PAD) ||
2298 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2299 sum.OutOctetsProtected,
2300 MACSEC_TXSC_STATS_ATTR_PAD) ||
2301 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2302 sum.OutOctetsEncrypted,
2303 MACSEC_TXSC_STATS_ATTR_PAD))
c09440f7
SD		 2304 return -EMSGSIZE;
2305
2306 return 0;
2307}
2308
e1427237
FW		 2309static noinline_for_stack int
2310copy_secy_stats(struct sk_buff *skb, struct pcpu_secy_stats __percpu *pstats)
c09440f7
SD		 2311{
2312 struct macsec_dev_stats sum = {0, };
2313 int cpu;
2314
2315 for_each_possible_cpu(cpu) {
2316 const struct pcpu_secy_stats *stats;
2317 struct macsec_dev_stats tmp;
2318 unsigned int start;
2319
2320 stats = per_cpu_ptr(pstats, cpu);
2321 do {
2322 start = u64_stats_fetch_begin_irq(&stats->syncp);
2323 memcpy(&tmp, &stats->stats, sizeof(tmp));
2324 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2325
2326 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2327 sum.InPktsUntagged += tmp.InPktsUntagged;
2328 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2329 sum.InPktsNoTag += tmp.InPktsNoTag;
2330 sum.InPktsBadTag += tmp.InPktsBadTag;
2331 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2332 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2333 sum.InPktsOverrun += tmp.InPktsOverrun;
2334 }
2335
f60d94c0
ND		 2336 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2337 sum.OutPktsUntagged,
2338 MACSEC_SECY_STATS_ATTR_PAD) ||
2339 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2340 sum.InPktsUntagged,
2341 MACSEC_SECY_STATS_ATTR_PAD) ||
2342 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2343 sum.OutPktsTooLong,
2344 MACSEC_SECY_STATS_ATTR_PAD) ||
2345 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2346 sum.InPktsNoTag,
2347 MACSEC_SECY_STATS_ATTR_PAD) ||
2348 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2349 sum.InPktsBadTag,
2350 MACSEC_SECY_STATS_ATTR_PAD) ||
2351 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2352 sum.InPktsUnknownSCI,
2353 MACSEC_SECY_STATS_ATTR_PAD) ||
2354 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2355 sum.InPktsNoSCI,
2356 MACSEC_SECY_STATS_ATTR_PAD) ||
2357 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2358 sum.InPktsOverrun,
2359 MACSEC_SECY_STATS_ATTR_PAD))
c09440f7
SD		 2360 return -EMSGSIZE;
2361
2362 return 0;
2363}
2364
2365static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2366{
2367 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ae0be8de
MK		 2368 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2369 MACSEC_ATTR_SECY);
ccfdec90 2370 u64 csid;
c09440f7
SD		 2371
2372 if (!secy_nest)
2373 return 1;
2374
ccfdec90
FW		 2375 switch (secy->key_len) {
2376 case MACSEC_GCM_AES_128_SAK_LEN:
e8660ded 2377 csid = MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 2378 break;
2379 case MACSEC_GCM_AES_256_SAK_LEN:
2380 csid = MACSEC_CIPHER_ID_GCM_AES_256;
2381 break;
2382 default:
2383 goto cancel;
2384 }
2385
f60d94c0
ND		 2386 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2387 MACSEC_SECY_ATTR_PAD) ||
2388 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
ccfdec90 2389 csid, MACSEC_SECY_ATTR_PAD) ||
c09440f7
SD		 2390 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2391 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2392 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2393 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2394 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2395 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2396 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2397 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2398 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2399 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2400 goto cancel;
2401
2402 if (secy->replay_protect) {
2403 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2404 goto cancel;
2405 }
2406
2407 nla_nest_end(skb, secy_nest);
2408 return 0;
2409
2410cancel:
2411 nla_nest_cancel(skb, secy_nest);
2412 return 1;
2413}
2414
e1427237
FW		 2415static noinline_for_stack int
2416dump_secy(struct macsec_secy *secy, struct net_device *dev,
2417 struct sk_buff *skb, struct netlink_callback *cb)
c09440f7
SD		 2418{
2419 struct macsec_rx_sc *rx_sc;
2420 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2421 struct nlattr *txsa_list, *rxsc_list;
2422 int i, j;
2423 void *hdr;
2424 struct nlattr *attr;
2425
2426 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2427 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2428 if (!hdr)
2429 return -EMSGSIZE;
2430
0a833c29 2431 genl_dump_check_consistent(cb, hdr);
c09440f7
SD		 2432
2433 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2434 goto nla_put_failure;
2435
2436 if (nla_put_secy(secy, skb))
2437 goto nla_put_failure;
2438
ae0be8de 2439 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
c09440f7
SD		 2440 if (!attr)
2441 goto nla_put_failure;
2442 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2443 nla_nest_cancel(skb, attr);
2444 goto nla_put_failure;
2445 }
2446 nla_nest_end(skb, attr);
2447
ae0be8de 2448 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
c09440f7
SD		 2449 if (!attr)
2450 goto nla_put_failure;
2451 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2452 nla_nest_cancel(skb, attr);
2453 goto nla_put_failure;
2454 }
2455 nla_nest_end(skb, attr);
2456
ae0be8de 2457 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
c09440f7
SD		 2458 if (!txsa_list)
2459 goto nla_put_failure;
2460 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2461 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2462 struct nlattr *txsa_nest;
2463
2464 if (!tx_sa)
2465 continue;
2466
ae0be8de 2467 txsa_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 2468 if (!txsa_nest) {
2469 nla_nest_cancel(skb, txsa_list);
2470 goto nla_put_failure;
2471 }
2472
2473 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2474 nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
8acca6ac 2475 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
c09440f7
SD		 2476 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2477 nla_nest_cancel(skb, txsa_nest);
2478 nla_nest_cancel(skb, txsa_list);
2479 goto nla_put_failure;
2480 }
2481
ae0be8de 2482 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
c09440f7
SD		 2483 if (!attr) {
2484 nla_nest_cancel(skb, txsa_nest);
2485 nla_nest_cancel(skb, txsa_list);
2486 goto nla_put_failure;
2487 }
2488 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2489 nla_nest_cancel(skb, attr);
2490 nla_nest_cancel(skb, txsa_nest);
2491 nla_nest_cancel(skb, txsa_list);
2492 goto nla_put_failure;
2493 }
2494 nla_nest_end(skb, attr);
2495
2496 nla_nest_end(skb, txsa_nest);
2497 }
2498 nla_nest_end(skb, txsa_list);
2499
ae0be8de 2500 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
c09440f7
SD		 2501 if (!rxsc_list)
2502 goto nla_put_failure;
2503
2504 j = 1;
2505 for_each_rxsc_rtnl(secy, rx_sc) {
2506 int k;
2507 struct nlattr *rxsa_list;
ae0be8de 2508 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 2509
2510 if (!rxsc_nest) {
2511 nla_nest_cancel(skb, rxsc_list);
2512 goto nla_put_failure;
2513 }
2514
2515 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
f60d94c0
ND		 2516 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
2517 MACSEC_RXSC_ATTR_PAD)) {
c09440f7
SD		 2518 nla_nest_cancel(skb, rxsc_nest);
2519 nla_nest_cancel(skb, rxsc_list);
2520 goto nla_put_failure;
2521 }
2522
ae0be8de 2523 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
c09440f7
SD		 2524 if (!attr) {
2525 nla_nest_cancel(skb, rxsc_nest);
2526 nla_nest_cancel(skb, rxsc_list);
2527 goto nla_put_failure;
2528 }
2529 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
2530 nla_nest_cancel(skb, attr);
2531 nla_nest_cancel(skb, rxsc_nest);
2532 nla_nest_cancel(skb, rxsc_list);
2533 goto nla_put_failure;
2534 }
2535 nla_nest_end(skb, attr);
2536
ae0be8de
MK		 2537 rxsa_list = nla_nest_start_noflag(skb,
2538 MACSEC_RXSC_ATTR_SA_LIST);
c09440f7
SD		 2539 if (!rxsa_list) {
2540 nla_nest_cancel(skb, rxsc_nest);
2541 nla_nest_cancel(skb, rxsc_list);
2542 goto nla_put_failure;
2543 }
2544
2545 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
2546 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
2547 struct nlattr *rxsa_nest;
2548
2549 if (!rx_sa)
2550 continue;
2551
ae0be8de 2552 rxsa_nest = nla_nest_start_noflag(skb, k++);
c09440f7
SD		 2553 if (!rxsa_nest) {
2554 nla_nest_cancel(skb, rxsa_list);
2555 nla_nest_cancel(skb, rxsc_nest);
2556 nla_nest_cancel(skb, rxsc_list);
2557 goto nla_put_failure;
2558 }
2559
ae0be8de
MK		 2560 attr = nla_nest_start_noflag(skb,
2561 MACSEC_SA_ATTR_STATS);
c09440f7
SD		 2562 if (!attr) {
2563 nla_nest_cancel(skb, rxsa_list);
2564 nla_nest_cancel(skb, rxsc_nest);
2565 nla_nest_cancel(skb, rxsc_list);
2566 goto nla_put_failure;
2567 }
2568 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
2569 nla_nest_cancel(skb, attr);
2570 nla_nest_cancel(skb, rxsa_list);
2571 nla_nest_cancel(skb, rxsc_nest);
2572 nla_nest_cancel(skb, rxsc_list);
2573 goto nla_put_failure;
2574 }
2575 nla_nest_end(skb, attr);
2576
2577 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
2578 nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
8acca6ac 2579 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
c09440f7
SD		 2580 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
2581 nla_nest_cancel(skb, rxsa_nest);
2582 nla_nest_cancel(skb, rxsc_nest);
2583 nla_nest_cancel(skb, rxsc_list);
2584 goto nla_put_failure;
2585 }
2586 nla_nest_end(skb, rxsa_nest);
2587 }
2588
2589 nla_nest_end(skb, rxsa_list);
2590 nla_nest_end(skb, rxsc_nest);
2591 }
2592
2593 nla_nest_end(skb, rxsc_list);
2594
c09440f7
SD		 2595 genlmsg_end(skb, hdr);
2596
2597 return 0;
2598
2599nla_put_failure:
c09440f7
SD		 2600 genlmsg_cancel(skb, hdr);
2601 return -EMSGSIZE;
2602}
2603
96cfc505
SD		 2604static int macsec_generation = 1; /* protected by RTNL */
2605
c09440f7
SD		 2606static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
2607{
2608 struct net *net = sock_net(skb->sk);
2609 struct net_device *dev;
2610 int dev_idx, d;
2611
2612 dev_idx = cb->args[0];
2613
2614 d = 0;
c10c63ea 2615 rtnl_lock();
96cfc505
SD		 2616
2617 cb->seq = macsec_generation;
2618
c09440f7
SD		 2619 for_each_netdev(net, dev) {
2620 struct macsec_secy *secy;
2621
2622 if (d < dev_idx)
2623 goto next;
2624
2625 if (!netif_is_macsec(dev))
2626 goto next;
2627
2628 secy = &macsec_priv(dev)->secy;
2629 if (dump_secy(secy, dev, skb, cb) < 0)
2630 goto done;
2631next:
2632 d++;
2633 }
2634
2635done:
c10c63ea 2636 rtnl_unlock();
c09440f7
SD		 2637 cb->args[0] = d;
2638 return skb->len;
2639}
2640
2641static const struct genl_ops macsec_genl_ops[] = {
2642 {
2643 .cmd = MACSEC_CMD_GET_TXSC,
2644 .dumpit = macsec_dump_txsc,
c09440f7
SD		 2645 },
2646 {
2647 .cmd = MACSEC_CMD_ADD_RXSC,
2648 .doit = macsec_add_rxsc,
c09440f7
SD		 2649 .flags = GENL_ADMIN_PERM,
2650 },
2651 {
2652 .cmd = MACSEC_CMD_DEL_RXSC,
2653 .doit = macsec_del_rxsc,
c09440f7
SD		 2654 .flags = GENL_ADMIN_PERM,
2655 },
2656 {
2657 .cmd = MACSEC_CMD_UPD_RXSC,
2658 .doit = macsec_upd_rxsc,
c09440f7
SD		 2659 .flags = GENL_ADMIN_PERM,
2660 },
2661 {
2662 .cmd = MACSEC_CMD_ADD_TXSA,
2663 .doit = macsec_add_txsa,
c09440f7
SD		 2664 .flags = GENL_ADMIN_PERM,
2665 },
2666 {
2667 .cmd = MACSEC_CMD_DEL_TXSA,
2668 .doit = macsec_del_txsa,
c09440f7
SD		 2669 .flags = GENL_ADMIN_PERM,
2670 },
2671 {
2672 .cmd = MACSEC_CMD_UPD_TXSA,
2673 .doit = macsec_upd_txsa,
c09440f7
SD		 2674 .flags = GENL_ADMIN_PERM,
2675 },
2676 {
2677 .cmd = MACSEC_CMD_ADD_RXSA,
2678 .doit = macsec_add_rxsa,
c09440f7
SD		 2679 .flags = GENL_ADMIN_PERM,
2680 },
2681 {
2682 .cmd = MACSEC_CMD_DEL_RXSA,
2683 .doit = macsec_del_rxsa,
c09440f7
SD		 2684 .flags = GENL_ADMIN_PERM,
2685 },
2686 {
2687 .cmd = MACSEC_CMD_UPD_RXSA,
2688 .doit = macsec_upd_rxsa,
c09440f7
SD		 2689 .flags = GENL_ADMIN_PERM,
2690 },
2691};
2692
56989f6d 2693static struct genl_family macsec_fam __ro_after_init = {
489111e5
JB		 2694 .name = MACSEC_GENL_NAME,
2695 .hdrsize = 0,
2696 .version = MACSEC_GENL_VERSION,
2697 .maxattr = MACSEC_ATTR_MAX,
3b0f31f2 2698 .policy = macsec_genl_policy,
489111e5
JB		 2699 .netnsok = true,
2700 .module = THIS_MODULE,
2701 .ops = macsec_genl_ops,
2702 .n_ops = ARRAY_SIZE(macsec_genl_ops),
2703};
2704
c09440f7
SD		 2705static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
2706 struct net_device *dev)
2707{
2708 struct macsec_dev *macsec = netdev_priv(dev);
2709 struct macsec_secy *secy = &macsec->secy;
2710 struct pcpu_secy_stats *secy_stats;
2711 int ret, len;
2712
2713 /* 10.5 */
2714 if (!secy->protect_frames) {
2715 secy_stats = this_cpu_ptr(macsec->stats);
2716 u64_stats_update_begin(&secy_stats->syncp);
2717 secy_stats->stats.OutPktsUntagged++;
2718 u64_stats_update_end(&secy_stats->syncp);
79c62220 2719 skb->dev = macsec->real_dev;
c09440f7
SD		 2720 len = skb->len;
2721 ret = dev_queue_xmit(skb);
2722 count_tx(dev, ret, len);
2723 return ret;
2724 }
2725
2726 if (!secy->operational) {
2727 kfree_skb(skb);
2728 dev->stats.tx_dropped++;
2729 return NETDEV_TX_OK;
2730 }
2731
2732 skb = macsec_encrypt(skb, dev);
2733 if (IS_ERR(skb)) {
2734 if (PTR_ERR(skb) != -EINPROGRESS)
2735 dev->stats.tx_dropped++;
2736 return NETDEV_TX_OK;
2737 }
2738
2739 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
2740
2741 macsec_encrypt_finish(skb, dev);
2742 len = skb->len;
2743 ret = dev_queue_xmit(skb);
2744 count_tx(dev, ret, len);
2745 return ret;
2746}
2747
2748#define MACSEC_FEATURES \
2749 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
e2003872
SD		 2750static struct lock_class_key macsec_netdev_addr_lock_key;
2751
c09440f7
SD		 2752static int macsec_dev_init(struct net_device *dev)
2753{
2754 struct macsec_dev *macsec = macsec_priv(dev);
2755 struct net_device *real_dev = macsec->real_dev;
5491e7c6 2756 int err;
c09440f7
SD		 2757
2758 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2759 if (!dev->tstats)
2760 return -ENOMEM;
2761
5491e7c6
PA		 2762 err = gro_cells_init(&macsec->gro_cells, dev);
2763 if (err) {
2764 free_percpu(dev->tstats);
2765 return err;
2766 }
2767
c09440f7
SD		 2768 dev->features = real_dev->features & MACSEC_FEATURES;
2769 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
2770
2771 dev->needed_headroom = real_dev->needed_headroom +
2772 MACSEC_NEEDED_HEADROOM;
2773 dev->needed_tailroom = real_dev->needed_tailroom +
2774 MACSEC_NEEDED_TAILROOM;
2775
2776 if (is_zero_ether_addr(dev->dev_addr))
2777 eth_hw_addr_inherit(dev, real_dev);
2778 if (is_zero_ether_addr(dev->broadcast))
2779 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
2780
2781 return 0;
2782}
2783
2784static void macsec_dev_uninit(struct net_device *dev)
2785{
5491e7c6
PA		 2786 struct macsec_dev *macsec = macsec_priv(dev);
2787
2788 gro_cells_destroy(&macsec->gro_cells);
c09440f7
SD		 2789 free_percpu(dev->tstats);
2790}
2791
2792static netdev_features_t macsec_fix_features(struct net_device *dev,
2793 netdev_features_t features)
2794{
2795 struct macsec_dev *macsec = macsec_priv(dev);
2796 struct net_device *real_dev = macsec->real_dev;
2797
5491e7c6
PA		 2798 features &= (real_dev->features & MACSEC_FEATURES) |
2799 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
2800 features |= NETIF_F_LLTX;
c09440f7
SD		 2801
2802 return features;
2803}
2804
2805static int macsec_dev_open(struct net_device *dev)
2806{
2807 struct macsec_dev *macsec = macsec_priv(dev);
2808 struct net_device *real_dev = macsec->real_dev;
2809 int err;
2810
c09440f7
SD		 2811 err = dev_uc_add(real_dev, dev->dev_addr);
2812 if (err < 0)
2813 return err;
2814
2815 if (dev->flags & IFF_ALLMULTI) {
2816 err = dev_set_allmulti(real_dev, 1);
2817 if (err < 0)
2818 goto del_unicast;
2819 }
2820
2821 if (dev->flags & IFF_PROMISC) {
2822 err = dev_set_promiscuity(real_dev, 1);
2823 if (err < 0)
2824 goto clear_allmulti;
2825 }
2826
2827 if (netif_carrier_ok(real_dev))
2828 netif_carrier_on(dev);
2829
2830 return 0;
2831clear_allmulti:
2832 if (dev->flags & IFF_ALLMULTI)
2833 dev_set_allmulti(real_dev, -1);
2834del_unicast:
2835 dev_uc_del(real_dev, dev->dev_addr);
2836 netif_carrier_off(dev);
2837 return err;
2838}
2839
2840static int macsec_dev_stop(struct net_device *dev)
2841{
2842 struct macsec_dev *macsec = macsec_priv(dev);
2843 struct net_device *real_dev = macsec->real_dev;
2844
2845 netif_carrier_off(dev);
2846
2847 dev_mc_unsync(real_dev, dev);
2848 dev_uc_unsync(real_dev, dev);
2849
2850 if (dev->flags & IFF_ALLMULTI)
2851 dev_set_allmulti(real_dev, -1);
2852
2853 if (dev->flags & IFF_PROMISC)
2854 dev_set_promiscuity(real_dev, -1);
2855
2856 dev_uc_del(real_dev, dev->dev_addr);
2857
2858 return 0;
2859}
2860
2861static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
2862{
2863 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2864
2865 if (!(dev->flags & IFF_UP))
2866 return;
2867
2868 if (change & IFF_ALLMULTI)
2869 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
2870
2871 if (change & IFF_PROMISC)
2872 dev_set_promiscuity(real_dev,
2873 dev->flags & IFF_PROMISC ? 1 : -1);
2874}
2875
2876static void macsec_dev_set_rx_mode(struct net_device *dev)
2877{
2878 struct net_device *real_dev = macsec_priv(dev)->real_dev;
2879
2880 dev_mc_sync(real_dev, dev);
2881 dev_uc_sync(real_dev, dev);
2882}
2883
2884static int macsec_set_mac_address(struct net_device *dev, void *p)
2885{
2886 struct macsec_dev *macsec = macsec_priv(dev);
2887 struct net_device *real_dev = macsec->real_dev;
2888 struct sockaddr *addr = p;
2889 int err;
2890
2891 if (!is_valid_ether_addr(addr->sa_data))
2892 return -EADDRNOTAVAIL;
2893
2894 if (!(dev->flags & IFF_UP))
2895 goto out;
2896
2897 err = dev_uc_add(real_dev, addr->sa_data);
2898 if (err < 0)
2899 return err;
2900
2901 dev_uc_del(real_dev, dev->dev_addr);
2902
2903out:
2904 ether_addr_copy(dev->dev_addr, addr->sa_data);
2905 return 0;
2906}
2907
2908static int macsec_change_mtu(struct net_device *dev, int new_mtu)
2909{
2910 struct macsec_dev *macsec = macsec_priv(dev);
2911 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
2912
2913 if (macsec->real_dev->mtu - extra < new_mtu)
2914 return -ERANGE;
2915
2916 dev->mtu = new_mtu;
2917
2918 return 0;
2919}
2920
bc1f4470 2921static void macsec_get_stats64(struct net_device *dev,
2922 struct rtnl_link_stats64 *s)
c09440f7
SD		 2923{
2924 int cpu;
2925
2926 if (!dev->tstats)
bc1f4470 2927 return;
c09440f7
SD		 2928
2929 for_each_possible_cpu(cpu) {
2930 struct pcpu_sw_netstats *stats;
2931 struct pcpu_sw_netstats tmp;
2932 int start;
2933
2934 stats = per_cpu_ptr(dev->tstats, cpu);
2935 do {
2936 start = u64_stats_fetch_begin_irq(&stats->syncp);
2937 tmp.rx_packets = stats->rx_packets;
2938 tmp.rx_bytes = stats->rx_bytes;
2939 tmp.tx_packets = stats->tx_packets;
2940 tmp.tx_bytes = stats->tx_bytes;
2941 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2942
2943 s->rx_packets += tmp.rx_packets;
2944 s->rx_bytes += tmp.rx_bytes;
2945 s->tx_packets += tmp.tx_packets;
2946 s->tx_bytes += tmp.tx_bytes;
2947 }
2948
2949 s->rx_dropped = dev->stats.rx_dropped;
2950 s->tx_dropped = dev->stats.tx_dropped;
c09440f7
SD		 2951}
2952
2953static int macsec_get_iflink(const struct net_device *dev)
2954{
2955 return macsec_priv(dev)->real_dev->ifindex;
2956}
2957
e2003872
SD		 2958static int macsec_get_nest_level(struct net_device *dev)
2959{
2960 return macsec_priv(dev)->nest_level;
2961}
2962
c09440f7
SD		 2963static const struct net_device_ops macsec_netdev_ops = {
2964 .ndo_init = macsec_dev_init,
2965 .ndo_uninit = macsec_dev_uninit,
2966 .ndo_open = macsec_dev_open,
2967 .ndo_stop = macsec_dev_stop,
2968 .ndo_fix_features = macsec_fix_features,
2969 .ndo_change_mtu = macsec_change_mtu,
2970 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
2971 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
2972 .ndo_set_mac_address = macsec_set_mac_address,
2973 .ndo_start_xmit = macsec_start_xmit,
2974 .ndo_get_stats64 = macsec_get_stats64,
2975 .ndo_get_iflink = macsec_get_iflink,
e2003872 2976 .ndo_get_lock_subclass = macsec_get_nest_level,
c09440f7
SD		 2977};
2978
2979static const struct device_type macsec_type = {
2980 .name = "macsec",
2981};
2982
2983static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
2984 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
2985 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
2986 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
2987 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
2988 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
2989 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
2990 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
2991 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
2992 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
2993 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
2994 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
2995 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
2996};
2997
2998static void macsec_free_netdev(struct net_device *dev)
2999{
3000 struct macsec_dev *macsec = macsec_priv(dev);
3001 struct net_device *real_dev = macsec->real_dev;
3002
3003 free_percpu(macsec->stats);
3004 free_percpu(macsec->secy.tx_sc.stats);
3005
3006 dev_put(real_dev);
c09440f7
SD		 3007}
3008
3009static void macsec_setup(struct net_device *dev)
3010{
3011 ether_setup(dev);
91572088
JW		 3012 dev->min_mtu = 0;
3013 dev->max_mtu = ETH_MAX_MTU;
e425974f 3014 dev->priv_flags |= IFF_NO_QUEUE;
c09440f7 3015 dev->netdev_ops = &macsec_netdev_ops;
cf124db5
DM		 3016 dev->needs_free_netdev = true;
3017 dev->priv_destructor = macsec_free_netdev;
c24acf03 3018 SET_NETDEV_DEVTYPE(dev, &macsec_type);
c09440f7
SD		 3019
3020 eth_zero_addr(dev->broadcast);
3021}
3022
ccfdec90
FW		 3023static int macsec_changelink_common(struct net_device *dev,
3024 struct nlattr *data[])
c09440f7
SD		 3025{
3026 struct macsec_secy *secy;
3027 struct macsec_tx_sc *tx_sc;
3028
3029 secy = &macsec_priv(dev)->secy;
3030 tx_sc = &secy->tx_sc;
3031
3032 if (data[IFLA_MACSEC_ENCODING_SA]) {
3033 struct macsec_tx_sa *tx_sa;
3034
3035 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3036 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3037
3038 secy->operational = tx_sa && tx_sa->active;
3039 }
3040
3041 if (data[IFLA_MACSEC_WINDOW])
3042 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3043
3044 if (data[IFLA_MACSEC_ENCRYPT])
3045 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3046
3047 if (data[IFLA_MACSEC_PROTECT])
3048 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3049
3050 if (data[IFLA_MACSEC_INC_SCI])
3051 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3052
3053 if (data[IFLA_MACSEC_ES])
3054 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3055
3056 if (data[IFLA_MACSEC_SCB])
3057 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3058
3059 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3060 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3061
3062 if (data[IFLA_MACSEC_VALIDATION])
3063 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
ccfdec90
FW		 3064
3065 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3066 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3067 case MACSEC_CIPHER_ID_GCM_AES_128:
e8660ded 3068 case MACSEC_DEFAULT_CIPHER_ID:
ccfdec90
FW		 3069 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3070 break;
3071 case MACSEC_CIPHER_ID_GCM_AES_256:
3072 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3073 break;
3074 default:
3075 return -EINVAL;
3076 }
3077 }
3078
3079 return 0;
c09440f7
SD		 3080}
3081
3082static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
ad744b22
MS		 3083 struct nlattr *data[],
3084 struct netlink_ext_ack *extack)
c09440f7
SD		 3085{
3086 if (!data)
3087 return 0;
3088
3089 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3090 data[IFLA_MACSEC_ICV_LEN] ||
3091 data[IFLA_MACSEC_SCI] ||
3092 data[IFLA_MACSEC_PORT])
3093 return -EINVAL;
3094
ccfdec90 3095 return macsec_changelink_common(dev, data);
c09440f7
SD		 3096}
3097
3098static void macsec_del_dev(struct macsec_dev *macsec)
3099{
3100 int i;
3101
3102 while (macsec->secy.rx_sc) {
3103 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3104
3105 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3106 free_rx_sc(rx_sc);
3107 }
3108
3109 for (i = 0; i < MACSEC_NUM_AN; i++) {
3110 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3111
3112 if (sa) {
3113 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3114 clear_tx_sa(sa);
3115 }
3116 }
3117}
3118
bbe11fab
SD		 3119static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3120{
3121 struct macsec_dev *macsec = macsec_priv(dev);
e2003872 3122 struct net_device *real_dev = macsec->real_dev;
bbe11fab
SD		 3123
3124 unregister_netdevice_queue(dev, head);
3125 list_del_rcu(&macsec->secys);
3126 macsec_del_dev(macsec);
e2003872 3127 netdev_upper_dev_unlink(real_dev, dev);
bbe11fab
SD		 3128
3129 macsec_generation++;
3130}
3131
c09440f7
SD		 3132static void macsec_dellink(struct net_device *dev, struct list_head *head)
3133{
3134 struct macsec_dev *macsec = macsec_priv(dev);
3135 struct net_device *real_dev = macsec->real_dev;
3136 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3137
bbe11fab 3138 macsec_common_dellink(dev, head);
96cfc505 3139
960d5848 3140 if (list_empty(&rxd->secys)) {
c09440f7 3141 netdev_rx_handler_unregister(real_dev);
960d5848
SD		 3142 kfree(rxd);
3143 }
c09440f7
SD		 3144}
3145
3146static int register_macsec_dev(struct net_device *real_dev,
3147 struct net_device *dev)
3148{
3149 struct macsec_dev *macsec = macsec_priv(dev);
3150 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3151
3152 if (!rxd) {
3153 int err;
3154
3155 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3156 if (!rxd)
3157 return -ENOMEM;
3158
3159 INIT_LIST_HEAD(&rxd->secys);
3160
3161 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3162 rxd);
960d5848
SD		 3163 if (err < 0) {
3164 kfree(rxd);
c09440f7 3165 return err;
960d5848 3166 }
c09440f7
SD		 3167 }
3168
3169 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3170 return 0;
3171}
3172
3173static bool sci_exists(struct net_device *dev, sci_t sci)
3174{
3175 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3176 struct macsec_dev *macsec;
3177
3178 list_for_each_entry(macsec, &rxd->secys, secys) {
3179 if (macsec->secy.sci == sci)
3180 return true;
3181 }
3182
3183 return false;
3184}
3185
3186static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3187{
3188 return make_sci(dev->dev_addr, port);
3189}
3190
3191static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3192{
3193 struct macsec_dev *macsec = macsec_priv(dev);
3194 struct macsec_secy *secy = &macsec->secy;
3195
3196 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3197 if (!macsec->stats)
3198 return -ENOMEM;
3199
3200 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3201 if (!secy->tx_sc.stats) {
3202 free_percpu(macsec->stats);
3203 return -ENOMEM;
3204 }
3205
3206 if (sci == MACSEC_UNDEF_SCI)
3207 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3208
3209 secy->netdev = dev;
3210 secy->operational = true;
3211 secy->key_len = DEFAULT_SAK_LEN;
3212 secy->icv_len = icv_len;
3213 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3214 secy->protect_frames = true;
3215 secy->replay_protect = false;
3216
3217 secy->sci = sci;
3218 secy->tx_sc.active = true;
3219 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3220 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3221 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3222 secy->tx_sc.end_station = false;
3223 secy->tx_sc.scb = false;
3224
3225 return 0;
3226}
3227
3228static int macsec_newlink(struct net *net, struct net_device *dev,
7a3f4a18
MS		 3229 struct nlattr *tb[], struct nlattr *data[],
3230 struct netlink_ext_ack *extack)
c09440f7
SD		 3231{
3232 struct macsec_dev *macsec = macsec_priv(dev);
3233 struct net_device *real_dev;
3234 int err;
3235 sci_t sci;
3236 u8 icv_len = DEFAULT_ICV_LEN;
3237 rx_handler_func_t *rx_handler;
3238
3239 if (!tb[IFLA_LINK])
3240 return -EINVAL;
3241 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3242 if (!real_dev)
3243 return -ENODEV;
3244
3245 dev->priv_flags |= IFF_MACSEC;
3246
3247 macsec->real_dev = real_dev;
3248
3249 if (data && data[IFLA_MACSEC_ICV_LEN])
3250 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3251 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3252
3253 rx_handler = rtnl_dereference(real_dev->rx_handler);
3254 if (rx_handler && rx_handler != macsec_handle_frame)
3255 return -EBUSY;
3256
3257 err = register_netdevice(dev);
3258 if (err < 0)
3259 return err;
3260
0759e552
SD		 3261 dev_hold(real_dev);
3262
952fcfd0 3263 macsec->nest_level = dev_get_nest_level(real_dev) + 1;
e2003872
SD		 3264 netdev_lockdep_set_classes(dev);
3265 lockdep_set_class_and_subclass(&dev->addr_list_lock,
3266 &macsec_netdev_addr_lock_key,
3267 macsec_get_nest_level(dev));
3268
42ab19ee 3269 err = netdev_upper_dev_link(real_dev, dev, extack);
e2003872 3270 if (err < 0)
bd28899d 3271 goto unregister;
e2003872 3272
c09440f7
SD		 3273 /* need to be already registered so that ->init has run and
3274 * the MAC addr is set
3275 */
3276 if (data && data[IFLA_MACSEC_SCI])
3277 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3278 else if (data && data[IFLA_MACSEC_PORT])
3279 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3280 else
3281 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3282
3283 if (rx_handler && sci_exists(real_dev, sci)) {
3284 err = -EBUSY;
e2003872 3285 goto unlink;
c09440f7
SD		 3286 }
3287
3288 err = macsec_add_dev(dev, sci, icv_len);
3289 if (err)
e2003872 3290 goto unlink;
c09440f7 3291
ccfdec90
FW		 3292 if (data) {
3293 err = macsec_changelink_common(dev, data);
3294 if (err)
3295 goto del_dev;
3296 }
c09440f7
SD		 3297
3298 err = register_macsec_dev(real_dev, dev);
3299 if (err < 0)
3300 goto del_dev;
3301
e6ac0758
SD		 3302 netif_stacked_transfer_operstate(real_dev, dev);
3303 linkwatch_fire_event(dev);
3304
96cfc505
SD		 3305 macsec_generation++;
3306
c09440f7
SD		 3307 return 0;
3308
3309del_dev:
3310 macsec_del_dev(macsec);
e2003872
SD		 3311unlink:
3312 netdev_upper_dev_unlink(real_dev, dev);
bd28899d 3313unregister:
c09440f7
SD		 3314 unregister_netdevice(dev);
3315 return err;
3316}
3317
a8b8a889
MS		 3318static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
3319 struct netlink_ext_ack *extack)
c09440f7 3320{
74816480 3321 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
c09440f7
SD		 3322 u8 icv_len = DEFAULT_ICV_LEN;
3323 int flag;
3324 bool es, scb, sci;
3325
3326 if (!data)
3327 return 0;
3328
3329 if (data[IFLA_MACSEC_CIPHER_SUITE])
3330 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3331
f04c392d 3332 if (data[IFLA_MACSEC_ICV_LEN]) {
c09440f7 3333 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
f04c392d
DC		 3334 if (icv_len != DEFAULT_ICV_LEN) {
3335 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3336 struct crypto_aead *dummy_tfm;
3337
3338 dummy_tfm = macsec_alloc_tfm(dummy_key,
3339 DEFAULT_SAK_LEN,
3340 icv_len);
3341 if (IS_ERR(dummy_tfm))
3342 return PTR_ERR(dummy_tfm);
3343 crypto_free_aead(dummy_tfm);
3344 }
3345 }
c09440f7
SD		 3346
3347 switch (csid) {
ccfdec90
FW		 3348 case MACSEC_CIPHER_ID_GCM_AES_128:
3349 case MACSEC_CIPHER_ID_GCM_AES_256:
e8660ded 3350 case MACSEC_DEFAULT_CIPHER_ID:
c09440f7 3351 if (icv_len < MACSEC_MIN_ICV_LEN ||
2ccbe2cb 3352 icv_len > MACSEC_STD_ICV_LEN)
c09440f7
SD		 3353 return -EINVAL;
3354 break;
3355 default:
3356 return -EINVAL;
3357 }
3358
3359 if (data[IFLA_MACSEC_ENCODING_SA]) {
3360 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3361 return -EINVAL;
3362 }
3363
3364 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3365 flag < IFLA_MACSEC_VALIDATION;
3366 flag++) {
3367 if (data[flag]) {
3368 if (nla_get_u8(data[flag]) > 1)
3369 return -EINVAL;
3370 }
3371 }
3372
3373 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3374 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3375 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3376
3377 if ((sci && (scb || es)) || (scb && es))
3378 return -EINVAL;
3379
3380 if (data[IFLA_MACSEC_VALIDATION] &&
3381 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3382 return -EINVAL;
3383
4b1fb935
SD		 3384 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
3385 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
c09440f7
SD		 3386 !data[IFLA_MACSEC_WINDOW])
3387 return -EINVAL;
3388
3389 return 0;
3390}
3391
3392static struct net *macsec_get_link_net(const struct net_device *dev)
3393{
3394 return dev_net(macsec_priv(dev)->real_dev);
3395}
3396
3397static size_t macsec_get_size(const struct net_device *dev)
3398{
c9fba3ed
ZS		 3399 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3400 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3401 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3402 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3403 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3404 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3405 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3406 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3407 nla_total_size(1) + /* IFLA_MACSEC_ES */
3408 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3409 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3410 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
c09440f7
SD		 3411 0;
3412}
3413
3414static int macsec_fill_info(struct sk_buff *skb,
3415 const struct net_device *dev)
3416{
3417 struct macsec_secy *secy = &macsec_priv(dev)->secy;
3418 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ccfdec90
FW		 3419 u64 csid;
3420
3421 switch (secy->key_len) {
3422 case MACSEC_GCM_AES_128_SAK_LEN:
e8660ded 3423 csid = MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 3424 break;
3425 case MACSEC_GCM_AES_256_SAK_LEN:
3426 csid = MACSEC_CIPHER_ID_GCM_AES_256;
3427 break;
3428 default:
3429 goto nla_put_failure;
3430 }
c09440f7 3431
f60d94c0
ND		 3432 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
3433 IFLA_MACSEC_PAD) ||
c09440f7 3434 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
f60d94c0 3435 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
ccfdec90 3436 csid, IFLA_MACSEC_PAD) ||
c09440f7
SD		 3437 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
3438 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
3439 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
3440 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
3441 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
3442 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
3443 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
3444 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
3445 0)
3446 goto nla_put_failure;
3447
3448 if (secy->replay_protect) {
3449 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
3450 goto nla_put_failure;
3451 }
3452
3453 return 0;
3454
3455nla_put_failure:
3456 return -EMSGSIZE;
3457}
3458
3459static struct rtnl_link_ops macsec_link_ops __read_mostly = {
3460 .kind = "macsec",
3461 .priv_size = sizeof(struct macsec_dev),
3462 .maxtype = IFLA_MACSEC_MAX,
3463 .policy = macsec_rtnl_policy,
3464 .setup = macsec_setup,
3465 .validate = macsec_validate_attr,
3466 .newlink = macsec_newlink,
3467 .changelink = macsec_changelink,
3468 .dellink = macsec_dellink,
3469 .get_size = macsec_get_size,
3470 .fill_info = macsec_fill_info,
3471 .get_link_net = macsec_get_link_net,
3472};
3473
3474static bool is_macsec_master(struct net_device *dev)
3475{
3476 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
3477}
3478
3479static int macsec_notify(struct notifier_block *this, unsigned long event,
3480 void *ptr)
3481{
3482 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
3483 LIST_HEAD(head);
3484
3485 if (!is_macsec_master(real_dev))
3486 return NOTIFY_DONE;
3487
3488 switch (event) {
e6ac0758
SD		 3489 case NETDEV_DOWN:
3490 case NETDEV_UP:
3491 case NETDEV_CHANGE: {
3492 struct macsec_dev *m, *n;
3493 struct macsec_rxh_data *rxd;
3494
3495 rxd = macsec_data_rtnl(real_dev);
3496 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
3497 struct net_device *dev = m->secy.netdev;
3498
3499 netif_stacked_transfer_operstate(real_dev, dev);
3500 }
3501 break;
3502 }
c09440f7
SD		 3503 case NETDEV_UNREGISTER: {
3504 struct macsec_dev *m, *n;
3505 struct macsec_rxh_data *rxd;
3506
3507 rxd = macsec_data_rtnl(real_dev);
3508 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
bbe11fab 3509 macsec_common_dellink(m->secy.netdev, &head);
c09440f7 3510 }
bbe11fab
SD		 3511
3512 netdev_rx_handler_unregister(real_dev);
3513 kfree(rxd);
3514
c09440f7
SD		 3515 unregister_netdevice_many(&head);
3516 break;
3517 }
3518 case NETDEV_CHANGEMTU: {
3519 struct macsec_dev *m;
3520 struct macsec_rxh_data *rxd;
3521
3522 rxd = macsec_data_rtnl(real_dev);
3523 list_for_each_entry(m, &rxd->secys, secys) {
3524 struct net_device *dev = m->secy.netdev;
3525 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
3526 macsec_extra_len(true));
3527
3528 if (dev->mtu > mtu)
3529 dev_set_mtu(dev, mtu);
3530 }
3531 }
3532 }
3533
3534 return NOTIFY_OK;
3535}
3536
3537static struct notifier_block macsec_notifier = {
3538 .notifier_call = macsec_notify,
3539};
3540
3541static int __init macsec_init(void)
3542{
3543 int err;
3544
3545 pr_info("MACsec IEEE 802.1AE\n");
3546 err = register_netdevice_notifier(&macsec_notifier);
3547 if (err)
3548 return err;
3549
3550 err = rtnl_link_register(&macsec_link_ops);
3551 if (err)
3552 goto notifier;
3553
489111e5 3554 err = genl_register_family(&macsec_fam);
c09440f7
SD		 3555 if (err)
3556 goto rtnl;
3557
3558 return 0;
3559
3560rtnl:
3561 rtnl_link_unregister(&macsec_link_ops);
3562notifier:
3563 unregister_netdevice_notifier(&macsec_notifier);
3564 return err;
3565}
3566
3567static void __exit macsec_exit(void)
3568{
3569 genl_unregister_family(&macsec_fam);
3570 rtnl_link_unregister(&macsec_link_ops);
3571 unregister_netdevice_notifier(&macsec_notifier);
b196c22a 3572 rcu_barrier();
c09440f7
SD		 3573}
3574
3575module_init(macsec_init);
3576module_exit(macsec_exit);
3577
3578MODULE_ALIAS_RTNL_LINK("macsec");
78362998 3579MODULE_ALIAS_GENL_FAMILY("macsec");
c09440f7
SD		 3580
3581MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3582MODULE_LICENSE("GPL v2");
Ubuntu Hirsute Linux kernel mirror