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c09440f7 SD |
1 | /* |
2 | * drivers/net/macsec.c - MACsec device | |
3 | * | |
4 | * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/types.h> | |
13 | #include <linux/skbuff.h> | |
14 | #include <linux/socket.h> | |
15 | #include <linux/module.h> | |
16 | #include <crypto/aead.h> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <linux/rtnetlink.h> | |
19 | #include <net/genetlink.h> | |
20 | #include <net/sock.h> | |
5491e7c6 | 21 | #include <net/gro_cells.h> |
c09440f7 SD |
22 | |
23 | #include <uapi/linux/if_macsec.h> | |
24 | ||
25 | typedef u64 __bitwise sci_t; | |
26 | ||
27 | #define MACSEC_SCI_LEN 8 | |
28 | ||
29 | /* SecTAG length = macsec_eth_header without the optional SCI */ | |
30 | #define MACSEC_TAG_LEN 6 | |
31 | ||
32 | struct macsec_eth_header { | |
33 | struct ethhdr eth; | |
34 | /* SecTAG */ | |
35 | u8 tci_an; | |
36 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
37 | u8 short_length:6, | |
38 | unused:2; | |
39 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
40 | u8 unused:2, | |
41 | short_length:6; | |
42 | #else | |
43 | #error "Please fix <asm/byteorder.h>" | |
44 | #endif | |
45 | __be32 packet_number; | |
46 | u8 secure_channel_id[8]; /* optional */ | |
47 | } __packed; | |
48 | ||
49 | #define MACSEC_TCI_VERSION 0x80 | |
50 | #define MACSEC_TCI_ES 0x40 /* end station */ | |
51 | #define MACSEC_TCI_SC 0x20 /* SCI present */ | |
52 | #define MACSEC_TCI_SCB 0x10 /* epon */ | |
53 | #define MACSEC_TCI_E 0x08 /* encryption */ | |
54 | #define MACSEC_TCI_C 0x04 /* changed text */ | |
55 | #define MACSEC_AN_MASK 0x03 /* association number */ | |
56 | #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C) | |
57 | ||
58 | /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */ | |
59 | #define MIN_NON_SHORT_LEN 48 | |
60 | ||
61 | #define GCM_AES_IV_LEN 12 | |
62 | #define DEFAULT_ICV_LEN 16 | |
63 | ||
64 | #define MACSEC_NUM_AN 4 /* 2 bits for the association number */ | |
65 | ||
66 | #define for_each_rxsc(secy, sc) \ | |
67 | for (sc = rcu_dereference_bh(secy->rx_sc); \ | |
68 | sc; \ | |
69 | sc = rcu_dereference_bh(sc->next)) | |
70 | #define for_each_rxsc_rtnl(secy, sc) \ | |
71 | for (sc = rtnl_dereference(secy->rx_sc); \ | |
72 | sc; \ | |
73 | sc = rtnl_dereference(sc->next)) | |
74 | ||
75 | struct gcm_iv { | |
76 | union { | |
77 | u8 secure_channel_id[8]; | |
78 | sci_t sci; | |
79 | }; | |
80 | __be32 pn; | |
81 | }; | |
82 | ||
83 | /** | |
84 | * struct macsec_key - SA key | |
85 | * @id: user-provided key identifier | |
86 | * @tfm: crypto struct, key storage | |
87 | */ | |
88 | struct macsec_key { | |
8acca6ac | 89 | u8 id[MACSEC_KEYID_LEN]; |
c09440f7 SD |
90 | struct crypto_aead *tfm; |
91 | }; | |
92 | ||
93 | struct macsec_rx_sc_stats { | |
94 | __u64 InOctetsValidated; | |
95 | __u64 InOctetsDecrypted; | |
96 | __u64 InPktsUnchecked; | |
97 | __u64 InPktsDelayed; | |
98 | __u64 InPktsOK; | |
99 | __u64 InPktsInvalid; | |
100 | __u64 InPktsLate; | |
101 | __u64 InPktsNotValid; | |
102 | __u64 InPktsNotUsingSA; | |
103 | __u64 InPktsUnusedSA; | |
104 | }; | |
105 | ||
106 | struct macsec_rx_sa_stats { | |
107 | __u32 InPktsOK; | |
108 | __u32 InPktsInvalid; | |
109 | __u32 InPktsNotValid; | |
110 | __u32 InPktsNotUsingSA; | |
111 | __u32 InPktsUnusedSA; | |
112 | }; | |
113 | ||
114 | struct macsec_tx_sa_stats { | |
115 | __u32 OutPktsProtected; | |
116 | __u32 OutPktsEncrypted; | |
117 | }; | |
118 | ||
119 | struct macsec_tx_sc_stats { | |
120 | __u64 OutPktsProtected; | |
121 | __u64 OutPktsEncrypted; | |
122 | __u64 OutOctetsProtected; | |
123 | __u64 OutOctetsEncrypted; | |
124 | }; | |
125 | ||
126 | struct macsec_dev_stats { | |
127 | __u64 OutPktsUntagged; | |
128 | __u64 InPktsUntagged; | |
129 | __u64 OutPktsTooLong; | |
130 | __u64 InPktsNoTag; | |
131 | __u64 InPktsBadTag; | |
132 | __u64 InPktsUnknownSCI; | |
133 | __u64 InPktsNoSCI; | |
134 | __u64 InPktsOverrun; | |
135 | }; | |
136 | ||
137 | /** | |
138 | * struct macsec_rx_sa - receive secure association | |
139 | * @active: | |
140 | * @next_pn: packet number expected for the next packet | |
141 | * @lock: protects next_pn manipulations | |
142 | * @key: key structure | |
143 | * @stats: per-SA stats | |
144 | */ | |
145 | struct macsec_rx_sa { | |
146 | struct macsec_key key; | |
147 | spinlock_t lock; | |
148 | u32 next_pn; | |
149 | atomic_t refcnt; | |
150 | bool active; | |
151 | struct macsec_rx_sa_stats __percpu *stats; | |
152 | struct macsec_rx_sc *sc; | |
153 | struct rcu_head rcu; | |
154 | }; | |
155 | ||
156 | struct pcpu_rx_sc_stats { | |
157 | struct macsec_rx_sc_stats stats; | |
158 | struct u64_stats_sync syncp; | |
159 | }; | |
160 | ||
161 | /** | |
162 | * struct macsec_rx_sc - receive secure channel | |
163 | * @sci: secure channel identifier for this SC | |
164 | * @active: channel is active | |
165 | * @sa: array of secure associations | |
166 | * @stats: per-SC stats | |
167 | */ | |
168 | struct macsec_rx_sc { | |
169 | struct macsec_rx_sc __rcu *next; | |
170 | sci_t sci; | |
171 | bool active; | |
172 | struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN]; | |
173 | struct pcpu_rx_sc_stats __percpu *stats; | |
174 | atomic_t refcnt; | |
175 | struct rcu_head rcu_head; | |
176 | }; | |
177 | ||
178 | /** | |
179 | * struct macsec_tx_sa - transmit secure association | |
180 | * @active: | |
181 | * @next_pn: packet number to use for the next packet | |
182 | * @lock: protects next_pn manipulations | |
183 | * @key: key structure | |
184 | * @stats: per-SA stats | |
185 | */ | |
186 | struct macsec_tx_sa { | |
187 | struct macsec_key key; | |
188 | spinlock_t lock; | |
189 | u32 next_pn; | |
190 | atomic_t refcnt; | |
191 | bool active; | |
192 | struct macsec_tx_sa_stats __percpu *stats; | |
193 | struct rcu_head rcu; | |
194 | }; | |
195 | ||
196 | struct pcpu_tx_sc_stats { | |
197 | struct macsec_tx_sc_stats stats; | |
198 | struct u64_stats_sync syncp; | |
199 | }; | |
200 | ||
201 | /** | |
202 | * struct macsec_tx_sc - transmit secure channel | |
203 | * @active: | |
204 | * @encoding_sa: association number of the SA currently in use | |
205 | * @encrypt: encrypt packets on transmit, or authenticate only | |
206 | * @send_sci: always include the SCI in the SecTAG | |
207 | * @end_station: | |
208 | * @scb: single copy broadcast flag | |
209 | * @sa: array of secure associations | |
210 | * @stats: stats for this TXSC | |
211 | */ | |
212 | struct macsec_tx_sc { | |
213 | bool active; | |
214 | u8 encoding_sa; | |
215 | bool encrypt; | |
216 | bool send_sci; | |
217 | bool end_station; | |
218 | bool scb; | |
219 | struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN]; | |
220 | struct pcpu_tx_sc_stats __percpu *stats; | |
221 | }; | |
222 | ||
223 | #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT | |
224 | ||
225 | /** | |
226 | * struct macsec_secy - MACsec Security Entity | |
227 | * @netdev: netdevice for this SecY | |
228 | * @n_rx_sc: number of receive secure channels configured on this SecY | |
229 | * @sci: secure channel identifier used for tx | |
230 | * @key_len: length of keys used by the cipher suite | |
231 | * @icv_len: length of ICV used by the cipher suite | |
232 | * @validate_frames: validation mode | |
233 | * @operational: MAC_Operational flag | |
234 | * @protect_frames: enable protection for this SecY | |
235 | * @replay_protect: enable packet number checks on receive | |
236 | * @replay_window: size of the replay window | |
237 | * @tx_sc: transmit secure channel | |
238 | * @rx_sc: linked list of receive secure channels | |
239 | */ | |
240 | struct macsec_secy { | |
241 | struct net_device *netdev; | |
242 | unsigned int n_rx_sc; | |
243 | sci_t sci; | |
244 | u16 key_len; | |
245 | u16 icv_len; | |
246 | enum macsec_validation_type validate_frames; | |
247 | bool operational; | |
248 | bool protect_frames; | |
249 | bool replay_protect; | |
250 | u32 replay_window; | |
251 | struct macsec_tx_sc tx_sc; | |
252 | struct macsec_rx_sc __rcu *rx_sc; | |
253 | }; | |
254 | ||
255 | struct pcpu_secy_stats { | |
256 | struct macsec_dev_stats stats; | |
257 | struct u64_stats_sync syncp; | |
258 | }; | |
259 | ||
260 | /** | |
261 | * struct macsec_dev - private data | |
262 | * @secy: SecY config | |
263 | * @real_dev: pointer to underlying netdevice | |
264 | * @stats: MACsec device stats | |
265 | * @secys: linked list of SecY's on the underlying device | |
266 | */ | |
267 | struct macsec_dev { | |
268 | struct macsec_secy secy; | |
269 | struct net_device *real_dev; | |
270 | struct pcpu_secy_stats __percpu *stats; | |
271 | struct list_head secys; | |
5491e7c6 | 272 | struct gro_cells gro_cells; |
e2003872 | 273 | unsigned int nest_level; |
c09440f7 SD |
274 | }; |
275 | ||
276 | /** | |
277 | * struct macsec_rxh_data - rx_handler private argument | |
278 | * @secys: linked list of SecY's on this underlying device | |
279 | */ | |
280 | struct macsec_rxh_data { | |
281 | struct list_head secys; | |
282 | }; | |
283 | ||
284 | static struct macsec_dev *macsec_priv(const struct net_device *dev) | |
285 | { | |
286 | return (struct macsec_dev *)netdev_priv(dev); | |
287 | } | |
288 | ||
289 | static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) | |
290 | { | |
291 | return rcu_dereference_bh(dev->rx_handler_data); | |
292 | } | |
293 | ||
294 | static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) | |
295 | { | |
296 | return rtnl_dereference(dev->rx_handler_data); | |
297 | } | |
298 | ||
299 | struct macsec_cb { | |
300 | struct aead_request *req; | |
301 | union { | |
302 | struct macsec_tx_sa *tx_sa; | |
303 | struct macsec_rx_sa *rx_sa; | |
304 | }; | |
305 | u8 assoc_num; | |
306 | bool valid; | |
307 | bool has_sci; | |
308 | }; | |
309 | ||
310 | static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) | |
311 | { | |
312 | struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); | |
313 | ||
314 | if (!sa || !sa->active) | |
315 | return NULL; | |
316 | ||
317 | if (!atomic_inc_not_zero(&sa->refcnt)) | |
318 | return NULL; | |
319 | ||
320 | return sa; | |
321 | } | |
322 | ||
323 | static void free_rx_sc_rcu(struct rcu_head *head) | |
324 | { | |
325 | struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); | |
326 | ||
327 | free_percpu(rx_sc->stats); | |
328 | kfree(rx_sc); | |
329 | } | |
330 | ||
331 | static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) | |
332 | { | |
333 | return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL; | |
334 | } | |
335 | ||
336 | static void macsec_rxsc_put(struct macsec_rx_sc *sc) | |
337 | { | |
338 | if (atomic_dec_and_test(&sc->refcnt)) | |
339 | call_rcu(&sc->rcu_head, free_rx_sc_rcu); | |
340 | } | |
341 | ||
342 | static void free_rxsa(struct rcu_head *head) | |
343 | { | |
344 | struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); | |
345 | ||
346 | crypto_free_aead(sa->key.tfm); | |
347 | free_percpu(sa->stats); | |
c09440f7 SD |
348 | kfree(sa); |
349 | } | |
350 | ||
351 | static void macsec_rxsa_put(struct macsec_rx_sa *sa) | |
352 | { | |
353 | if (atomic_dec_and_test(&sa->refcnt)) | |
354 | call_rcu(&sa->rcu, free_rxsa); | |
355 | } | |
356 | ||
357 | static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) | |
358 | { | |
359 | struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); | |
360 | ||
361 | if (!sa || !sa->active) | |
362 | return NULL; | |
363 | ||
364 | if (!atomic_inc_not_zero(&sa->refcnt)) | |
365 | return NULL; | |
366 | ||
367 | return sa; | |
368 | } | |
369 | ||
370 | static void free_txsa(struct rcu_head *head) | |
371 | { | |
372 | struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); | |
373 | ||
374 | crypto_free_aead(sa->key.tfm); | |
375 | free_percpu(sa->stats); | |
376 | kfree(sa); | |
377 | } | |
378 | ||
379 | static void macsec_txsa_put(struct macsec_tx_sa *sa) | |
380 | { | |
381 | if (atomic_dec_and_test(&sa->refcnt)) | |
382 | call_rcu(&sa->rcu, free_txsa); | |
383 | } | |
384 | ||
385 | static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) | |
386 | { | |
387 | BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); | |
388 | return (struct macsec_cb *)skb->cb; | |
389 | } | |
390 | ||
391 | #define MACSEC_PORT_ES (htons(0x0001)) | |
392 | #define MACSEC_PORT_SCB (0x0000) | |
393 | #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) | |
394 | ||
395 | #define DEFAULT_SAK_LEN 16 | |
396 | #define DEFAULT_SEND_SCI true | |
397 | #define DEFAULT_ENCRYPT false | |
398 | #define DEFAULT_ENCODING_SA 0 | |
399 | ||
e0f841f5 TB |
400 | static bool send_sci(const struct macsec_secy *secy) |
401 | { | |
402 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
403 | ||
404 | return tx_sc->send_sci || | |
405 | (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb); | |
406 | } | |
407 | ||
c09440f7 SD |
408 | static sci_t make_sci(u8 *addr, __be16 port) |
409 | { | |
410 | sci_t sci; | |
411 | ||
412 | memcpy(&sci, addr, ETH_ALEN); | |
413 | memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port)); | |
414 | ||
415 | return sci; | |
416 | } | |
417 | ||
418 | static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present) | |
419 | { | |
420 | sci_t sci; | |
421 | ||
422 | if (sci_present) | |
423 | memcpy(&sci, hdr->secure_channel_id, | |
424 | sizeof(hdr->secure_channel_id)); | |
425 | else | |
426 | sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES); | |
427 | ||
428 | return sci; | |
429 | } | |
430 | ||
431 | static unsigned int macsec_sectag_len(bool sci_present) | |
432 | { | |
433 | return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0); | |
434 | } | |
435 | ||
436 | static unsigned int macsec_hdr_len(bool sci_present) | |
437 | { | |
438 | return macsec_sectag_len(sci_present) + ETH_HLEN; | |
439 | } | |
440 | ||
441 | static unsigned int macsec_extra_len(bool sci_present) | |
442 | { | |
443 | return macsec_sectag_len(sci_present) + sizeof(__be16); | |
444 | } | |
445 | ||
446 | /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */ | |
447 | static void macsec_fill_sectag(struct macsec_eth_header *h, | |
e0f841f5 TB |
448 | const struct macsec_secy *secy, u32 pn, |
449 | bool sci_present) | |
c09440f7 SD |
450 | { |
451 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
452 | ||
e0f841f5 | 453 | memset(&h->tci_an, 0, macsec_sectag_len(sci_present)); |
c09440f7 SD |
454 | h->eth.h_proto = htons(ETH_P_MACSEC); |
455 | ||
e0f841f5 | 456 | if (sci_present) { |
c09440f7 SD |
457 | h->tci_an |= MACSEC_TCI_SC; |
458 | memcpy(&h->secure_channel_id, &secy->sci, | |
459 | sizeof(h->secure_channel_id)); | |
460 | } else { | |
461 | if (tx_sc->end_station) | |
462 | h->tci_an |= MACSEC_TCI_ES; | |
463 | if (tx_sc->scb) | |
464 | h->tci_an |= MACSEC_TCI_SCB; | |
465 | } | |
466 | ||
467 | h->packet_number = htonl(pn); | |
468 | ||
469 | /* with GCM, C/E clear for !encrypt, both set for encrypt */ | |
470 | if (tx_sc->encrypt) | |
471 | h->tci_an |= MACSEC_TCI_CONFID; | |
472 | else if (secy->icv_len != DEFAULT_ICV_LEN) | |
473 | h->tci_an |= MACSEC_TCI_C; | |
474 | ||
475 | h->tci_an |= tx_sc->encoding_sa; | |
476 | } | |
477 | ||
478 | static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len) | |
479 | { | |
480 | if (data_len < MIN_NON_SHORT_LEN) | |
481 | h->short_length = data_len; | |
482 | } | |
483 | ||
484 | /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */ | |
485 | static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len) | |
486 | { | |
487 | struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data; | |
488 | int len = skb->len - 2 * ETH_ALEN; | |
489 | int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len; | |
490 | ||
491 | /* a) It comprises at least 17 octets */ | |
492 | if (skb->len <= 16) | |
493 | return false; | |
494 | ||
495 | /* b) MACsec EtherType: already checked */ | |
496 | ||
497 | /* c) V bit is clear */ | |
498 | if (h->tci_an & MACSEC_TCI_VERSION) | |
499 | return false; | |
500 | ||
501 | /* d) ES or SCB => !SC */ | |
502 | if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) && | |
503 | (h->tci_an & MACSEC_TCI_SC)) | |
504 | return false; | |
505 | ||
506 | /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */ | |
507 | if (h->unused) | |
508 | return false; | |
509 | ||
510 | /* rx.pn != 0 (figure 10-5) */ | |
511 | if (!h->packet_number) | |
512 | return false; | |
513 | ||
514 | /* length check, f) g) h) i) */ | |
515 | if (h->short_length) | |
516 | return len == extra_len + h->short_length; | |
517 | return len >= extra_len + MIN_NON_SHORT_LEN; | |
518 | } | |
519 | ||
520 | #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true)) | |
2ccbe2cb | 521 | #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN |
c09440f7 SD |
522 | |
523 | static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn) | |
524 | { | |
525 | struct gcm_iv *gcm_iv = (struct gcm_iv *)iv; | |
526 | ||
527 | gcm_iv->sci = sci; | |
528 | gcm_iv->pn = htonl(pn); | |
529 | } | |
530 | ||
531 | static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) | |
532 | { | |
533 | return (struct macsec_eth_header *)skb_mac_header(skb); | |
534 | } | |
535 | ||
536 | static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy) | |
537 | { | |
538 | u32 pn; | |
539 | ||
540 | spin_lock_bh(&tx_sa->lock); | |
541 | pn = tx_sa->next_pn; | |
542 | ||
543 | tx_sa->next_pn++; | |
544 | if (tx_sa->next_pn == 0) { | |
545 | pr_debug("PN wrapped, transitioning to !oper\n"); | |
546 | tx_sa->active = false; | |
547 | if (secy->protect_frames) | |
548 | secy->operational = false; | |
549 | } | |
550 | spin_unlock_bh(&tx_sa->lock); | |
551 | ||
552 | return pn; | |
553 | } | |
554 | ||
555 | static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) | |
556 | { | |
557 | struct macsec_dev *macsec = netdev_priv(dev); | |
558 | ||
559 | skb->dev = macsec->real_dev; | |
560 | skb_reset_mac_header(skb); | |
561 | skb->protocol = eth_hdr(skb)->h_proto; | |
562 | } | |
563 | ||
564 | static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, | |
565 | struct macsec_tx_sa *tx_sa) | |
566 | { | |
567 | struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); | |
568 | ||
569 | u64_stats_update_begin(&txsc_stats->syncp); | |
570 | if (tx_sc->encrypt) { | |
571 | txsc_stats->stats.OutOctetsEncrypted += skb->len; | |
572 | txsc_stats->stats.OutPktsEncrypted++; | |
573 | this_cpu_inc(tx_sa->stats->OutPktsEncrypted); | |
574 | } else { | |
575 | txsc_stats->stats.OutOctetsProtected += skb->len; | |
576 | txsc_stats->stats.OutPktsProtected++; | |
577 | this_cpu_inc(tx_sa->stats->OutPktsProtected); | |
578 | } | |
579 | u64_stats_update_end(&txsc_stats->syncp); | |
580 | } | |
581 | ||
582 | static void count_tx(struct net_device *dev, int ret, int len) | |
583 | { | |
584 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
585 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
586 | ||
587 | u64_stats_update_begin(&stats->syncp); | |
588 | stats->tx_packets++; | |
589 | stats->tx_bytes += len; | |
590 | u64_stats_update_end(&stats->syncp); | |
591 | } else { | |
592 | dev->stats.tx_dropped++; | |
593 | } | |
594 | } | |
595 | ||
596 | static void macsec_encrypt_done(struct crypto_async_request *base, int err) | |
597 | { | |
598 | struct sk_buff *skb = base->data; | |
599 | struct net_device *dev = skb->dev; | |
600 | struct macsec_dev *macsec = macsec_priv(dev); | |
601 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; | |
602 | int len, ret; | |
603 | ||
604 | aead_request_free(macsec_skb_cb(skb)->req); | |
605 | ||
606 | rcu_read_lock_bh(); | |
607 | macsec_encrypt_finish(skb, dev); | |
608 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
609 | len = skb->len; | |
610 | ret = dev_queue_xmit(skb); | |
611 | count_tx(dev, ret, len); | |
612 | rcu_read_unlock_bh(); | |
613 | ||
614 | macsec_txsa_put(sa); | |
615 | dev_put(dev); | |
616 | } | |
617 | ||
5d9649b3 SD |
618 | static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
619 | unsigned char **iv, | |
5294b830 JD |
620 | struct scatterlist **sg, |
621 | int num_frags) | |
5d9649b3 SD |
622 | { |
623 | size_t size, iv_offset, sg_offset; | |
624 | struct aead_request *req; | |
625 | void *tmp; | |
626 | ||
627 | size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); | |
628 | iv_offset = size; | |
629 | size += GCM_AES_IV_LEN; | |
630 | ||
631 | size = ALIGN(size, __alignof__(struct scatterlist)); | |
632 | sg_offset = size; | |
5294b830 | 633 | size += sizeof(struct scatterlist) * num_frags; |
5d9649b3 SD |
634 | |
635 | tmp = kmalloc(size, GFP_ATOMIC); | |
636 | if (!tmp) | |
637 | return NULL; | |
638 | ||
639 | *iv = (unsigned char *)(tmp + iv_offset); | |
640 | *sg = (struct scatterlist *)(tmp + sg_offset); | |
641 | req = tmp; | |
642 | ||
643 | aead_request_set_tfm(req, tfm); | |
644 | ||
645 | return req; | |
646 | } | |
647 | ||
c09440f7 SD |
648 | static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
649 | struct net_device *dev) | |
650 | { | |
651 | int ret; | |
5d9649b3 | 652 | struct scatterlist *sg; |
5294b830 | 653 | struct sk_buff *trailer; |
5d9649b3 | 654 | unsigned char *iv; |
c09440f7 SD |
655 | struct ethhdr *eth; |
656 | struct macsec_eth_header *hh; | |
657 | size_t unprotected_len; | |
658 | struct aead_request *req; | |
659 | struct macsec_secy *secy; | |
660 | struct macsec_tx_sc *tx_sc; | |
661 | struct macsec_tx_sa *tx_sa; | |
662 | struct macsec_dev *macsec = macsec_priv(dev); | |
e0f841f5 | 663 | bool sci_present; |
c09440f7 SD |
664 | u32 pn; |
665 | ||
666 | secy = &macsec->secy; | |
667 | tx_sc = &secy->tx_sc; | |
668 | ||
669 | /* 10.5.1 TX SA assignment */ | |
670 | tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]); | |
671 | if (!tx_sa) { | |
672 | secy->operational = false; | |
673 | kfree_skb(skb); | |
674 | return ERR_PTR(-EINVAL); | |
675 | } | |
676 | ||
677 | if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || | |
678 | skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { | |
679 | struct sk_buff *nskb = skb_copy_expand(skb, | |
680 | MACSEC_NEEDED_HEADROOM, | |
681 | MACSEC_NEEDED_TAILROOM, | |
682 | GFP_ATOMIC); | |
683 | if (likely(nskb)) { | |
684 | consume_skb(skb); | |
685 | skb = nskb; | |
686 | } else { | |
687 | macsec_txsa_put(tx_sa); | |
688 | kfree_skb(skb); | |
689 | return ERR_PTR(-ENOMEM); | |
690 | } | |
691 | } else { | |
692 | skb = skb_unshare(skb, GFP_ATOMIC); | |
693 | if (!skb) { | |
694 | macsec_txsa_put(tx_sa); | |
695 | return ERR_PTR(-ENOMEM); | |
696 | } | |
697 | } | |
698 | ||
699 | unprotected_len = skb->len; | |
700 | eth = eth_hdr(skb); | |
e0f841f5 TB |
701 | sci_present = send_sci(secy); |
702 | hh = (struct macsec_eth_header *)skb_push(skb, macsec_extra_len(sci_present)); | |
c09440f7 SD |
703 | memmove(hh, eth, 2 * ETH_ALEN); |
704 | ||
705 | pn = tx_sa_update_pn(tx_sa, secy); | |
706 | if (pn == 0) { | |
707 | macsec_txsa_put(tx_sa); | |
708 | kfree_skb(skb); | |
709 | return ERR_PTR(-ENOLINK); | |
710 | } | |
e0f841f5 | 711 | macsec_fill_sectag(hh, secy, pn, sci_present); |
c09440f7 SD |
712 | macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN); |
713 | ||
c09440f7 SD |
714 | skb_put(skb, secy->icv_len); |
715 | ||
716 | if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { | |
717 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
718 | ||
719 | u64_stats_update_begin(&secy_stats->syncp); | |
720 | secy_stats->stats.OutPktsTooLong++; | |
721 | u64_stats_update_end(&secy_stats->syncp); | |
722 | ||
723 | macsec_txsa_put(tx_sa); | |
724 | kfree_skb(skb); | |
725 | return ERR_PTR(-EINVAL); | |
726 | } | |
727 | ||
5294b830 JD |
728 | ret = skb_cow_data(skb, 0, &trailer); |
729 | if (unlikely(ret < 0)) { | |
730 | macsec_txsa_put(tx_sa); | |
731 | kfree_skb(skb); | |
732 | return ERR_PTR(ret); | |
733 | } | |
734 | ||
735 | req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
736 | if (!req) { |
737 | macsec_txsa_put(tx_sa); | |
738 | kfree_skb(skb); | |
739 | return ERR_PTR(-ENOMEM); | |
740 | } | |
741 | ||
5d9649b3 SD |
742 | macsec_fill_iv(iv, secy->sci, pn); |
743 | ||
5294b830 | 744 | sg_init_table(sg, ret); |
c09440f7 SD |
745 | skb_to_sgvec(skb, sg, 0, skb->len); |
746 | ||
747 | if (tx_sc->encrypt) { | |
e0f841f5 | 748 | int len = skb->len - macsec_hdr_len(sci_present) - |
c09440f7 SD |
749 | secy->icv_len; |
750 | aead_request_set_crypt(req, sg, sg, len, iv); | |
e0f841f5 | 751 | aead_request_set_ad(req, macsec_hdr_len(sci_present)); |
c09440f7 SD |
752 | } else { |
753 | aead_request_set_crypt(req, sg, sg, 0, iv); | |
754 | aead_request_set_ad(req, skb->len - secy->icv_len); | |
755 | } | |
756 | ||
757 | macsec_skb_cb(skb)->req = req; | |
758 | macsec_skb_cb(skb)->tx_sa = tx_sa; | |
759 | aead_request_set_callback(req, 0, macsec_encrypt_done, skb); | |
760 | ||
761 | dev_hold(skb->dev); | |
762 | ret = crypto_aead_encrypt(req); | |
763 | if (ret == -EINPROGRESS) { | |
764 | return ERR_PTR(ret); | |
765 | } else if (ret != 0) { | |
766 | dev_put(skb->dev); | |
767 | kfree_skb(skb); | |
768 | aead_request_free(req); | |
769 | macsec_txsa_put(tx_sa); | |
770 | return ERR_PTR(-EINVAL); | |
771 | } | |
772 | ||
773 | dev_put(skb->dev); | |
774 | aead_request_free(req); | |
775 | macsec_txsa_put(tx_sa); | |
776 | ||
777 | return skb; | |
778 | } | |
779 | ||
780 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) | |
781 | { | |
782 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
783 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); | |
784 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); | |
785 | u32 lowest_pn = 0; | |
786 | ||
787 | spin_lock(&rx_sa->lock); | |
788 | if (rx_sa->next_pn >= secy->replay_window) | |
789 | lowest_pn = rx_sa->next_pn - secy->replay_window; | |
790 | ||
791 | /* Now perform replay protection check again | |
792 | * (see IEEE 802.1AE-2006 figure 10-5) | |
793 | */ | |
794 | if (secy->replay_protect && pn < lowest_pn) { | |
795 | spin_unlock(&rx_sa->lock); | |
796 | u64_stats_update_begin(&rxsc_stats->syncp); | |
797 | rxsc_stats->stats.InPktsLate++; | |
798 | u64_stats_update_end(&rxsc_stats->syncp); | |
799 | return false; | |
800 | } | |
801 | ||
802 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { | |
803 | u64_stats_update_begin(&rxsc_stats->syncp); | |
804 | if (hdr->tci_an & MACSEC_TCI_E) | |
805 | rxsc_stats->stats.InOctetsDecrypted += skb->len; | |
806 | else | |
807 | rxsc_stats->stats.InOctetsValidated += skb->len; | |
808 | u64_stats_update_end(&rxsc_stats->syncp); | |
809 | } | |
810 | ||
811 | if (!macsec_skb_cb(skb)->valid) { | |
812 | spin_unlock(&rx_sa->lock); | |
813 | ||
814 | /* 10.6.5 */ | |
815 | if (hdr->tci_an & MACSEC_TCI_C || | |
816 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
817 | u64_stats_update_begin(&rxsc_stats->syncp); | |
818 | rxsc_stats->stats.InPktsNotValid++; | |
819 | u64_stats_update_end(&rxsc_stats->syncp); | |
820 | return false; | |
821 | } | |
822 | ||
823 | u64_stats_update_begin(&rxsc_stats->syncp); | |
824 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { | |
825 | rxsc_stats->stats.InPktsInvalid++; | |
826 | this_cpu_inc(rx_sa->stats->InPktsInvalid); | |
827 | } else if (pn < lowest_pn) { | |
828 | rxsc_stats->stats.InPktsDelayed++; | |
829 | } else { | |
830 | rxsc_stats->stats.InPktsUnchecked++; | |
831 | } | |
832 | u64_stats_update_end(&rxsc_stats->syncp); | |
833 | } else { | |
834 | u64_stats_update_begin(&rxsc_stats->syncp); | |
835 | if (pn < lowest_pn) { | |
836 | rxsc_stats->stats.InPktsDelayed++; | |
837 | } else { | |
838 | rxsc_stats->stats.InPktsOK++; | |
839 | this_cpu_inc(rx_sa->stats->InPktsOK); | |
840 | } | |
841 | u64_stats_update_end(&rxsc_stats->syncp); | |
842 | ||
843 | if (pn >= rx_sa->next_pn) | |
844 | rx_sa->next_pn = pn + 1; | |
845 | spin_unlock(&rx_sa->lock); | |
846 | } | |
847 | ||
848 | return true; | |
849 | } | |
850 | ||
851 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) | |
852 | { | |
853 | skb->pkt_type = PACKET_HOST; | |
854 | skb->protocol = eth_type_trans(skb, dev); | |
855 | ||
856 | skb_reset_network_header(skb); | |
857 | if (!skb_transport_header_was_set(skb)) | |
858 | skb_reset_transport_header(skb); | |
859 | skb_reset_mac_len(skb); | |
860 | } | |
861 | ||
862 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) | |
863 | { | |
864 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); | |
865 | skb_pull(skb, hdr_len); | |
866 | pskb_trim_unique(skb, skb->len - icv_len); | |
867 | } | |
868 | ||
869 | static void count_rx(struct net_device *dev, int len) | |
870 | { | |
871 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
872 | ||
873 | u64_stats_update_begin(&stats->syncp); | |
874 | stats->rx_packets++; | |
875 | stats->rx_bytes += len; | |
876 | u64_stats_update_end(&stats->syncp); | |
877 | } | |
878 | ||
879 | static void macsec_decrypt_done(struct crypto_async_request *base, int err) | |
880 | { | |
881 | struct sk_buff *skb = base->data; | |
882 | struct net_device *dev = skb->dev; | |
883 | struct macsec_dev *macsec = macsec_priv(dev); | |
884 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
c78ebe1d | 885 | struct macsec_rx_sc *rx_sc = rx_sa->sc; |
c09440f7 SD |
886 | int len, ret; |
887 | u32 pn; | |
888 | ||
889 | aead_request_free(macsec_skb_cb(skb)->req); | |
890 | ||
b3bdc3ac LR |
891 | if (!err) |
892 | macsec_skb_cb(skb)->valid = true; | |
893 | ||
c09440f7 SD |
894 | rcu_read_lock_bh(); |
895 | pn = ntohl(macsec_ethhdr(skb)->packet_number); | |
896 | if (!macsec_post_decrypt(skb, &macsec->secy, pn)) { | |
897 | rcu_read_unlock_bh(); | |
898 | kfree_skb(skb); | |
899 | goto out; | |
900 | } | |
901 | ||
902 | macsec_finalize_skb(skb, macsec->secy.icv_len, | |
903 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
904 | macsec_reset_skb(skb, macsec->secy.netdev); | |
905 | ||
906 | len = skb->len; | |
5491e7c6 | 907 | ret = gro_cells_receive(&macsec->gro_cells, skb); |
c09440f7 SD |
908 | if (ret == NET_RX_SUCCESS) |
909 | count_rx(dev, len); | |
910 | else | |
911 | macsec->secy.netdev->stats.rx_dropped++; | |
912 | ||
913 | rcu_read_unlock_bh(); | |
914 | ||
915 | out: | |
916 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 917 | macsec_rxsc_put(rx_sc); |
c09440f7 | 918 | dev_put(dev); |
c09440f7 SD |
919 | } |
920 | ||
921 | static struct sk_buff *macsec_decrypt(struct sk_buff *skb, | |
922 | struct net_device *dev, | |
923 | struct macsec_rx_sa *rx_sa, | |
924 | sci_t sci, | |
925 | struct macsec_secy *secy) | |
926 | { | |
927 | int ret; | |
5d9649b3 | 928 | struct scatterlist *sg; |
5294b830 | 929 | struct sk_buff *trailer; |
5d9649b3 | 930 | unsigned char *iv; |
c09440f7 SD |
931 | struct aead_request *req; |
932 | struct macsec_eth_header *hdr; | |
933 | u16 icv_len = secy->icv_len; | |
934 | ||
935 | macsec_skb_cb(skb)->valid = false; | |
936 | skb = skb_share_check(skb, GFP_ATOMIC); | |
937 | if (!skb) | |
c3b7d0bd | 938 | return ERR_PTR(-ENOMEM); |
c09440f7 | 939 | |
5294b830 JD |
940 | ret = skb_cow_data(skb, 0, &trailer); |
941 | if (unlikely(ret < 0)) { | |
942 | kfree_skb(skb); | |
943 | return ERR_PTR(ret); | |
944 | } | |
945 | req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
946 | if (!req) { |
947 | kfree_skb(skb); | |
c3b7d0bd | 948 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
949 | } |
950 | ||
951 | hdr = (struct macsec_eth_header *)skb->data; | |
952 | macsec_fill_iv(iv, sci, ntohl(hdr->packet_number)); | |
953 | ||
5294b830 | 954 | sg_init_table(sg, ret); |
c09440f7 SD |
955 | skb_to_sgvec(skb, sg, 0, skb->len); |
956 | ||
957 | if (hdr->tci_an & MACSEC_TCI_E) { | |
958 | /* confidentiality: ethernet + macsec header | |
959 | * authenticated, encrypted payload | |
960 | */ | |
961 | int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci); | |
962 | ||
963 | aead_request_set_crypt(req, sg, sg, len, iv); | |
964 | aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci)); | |
965 | skb = skb_unshare(skb, GFP_ATOMIC); | |
966 | if (!skb) { | |
967 | aead_request_free(req); | |
c3b7d0bd | 968 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
969 | } |
970 | } else { | |
971 | /* integrity only: all headers + data authenticated */ | |
972 | aead_request_set_crypt(req, sg, sg, icv_len, iv); | |
973 | aead_request_set_ad(req, skb->len - icv_len); | |
974 | } | |
975 | ||
976 | macsec_skb_cb(skb)->req = req; | |
c09440f7 SD |
977 | skb->dev = dev; |
978 | aead_request_set_callback(req, 0, macsec_decrypt_done, skb); | |
979 | ||
980 | dev_hold(dev); | |
981 | ret = crypto_aead_decrypt(req); | |
982 | if (ret == -EINPROGRESS) { | |
c3b7d0bd | 983 | return ERR_PTR(ret); |
c09440f7 SD |
984 | } else if (ret != 0) { |
985 | /* decryption/authentication failed | |
986 | * 10.6 if validateFrames is disabled, deliver anyway | |
987 | */ | |
988 | if (ret != -EBADMSG) { | |
989 | kfree_skb(skb); | |
c3b7d0bd | 990 | skb = ERR_PTR(ret); |
c09440f7 SD |
991 | } |
992 | } else { | |
993 | macsec_skb_cb(skb)->valid = true; | |
994 | } | |
995 | dev_put(dev); | |
996 | ||
997 | aead_request_free(req); | |
998 | ||
999 | return skb; | |
1000 | } | |
1001 | ||
1002 | static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1003 | { | |
1004 | struct macsec_rx_sc *rx_sc; | |
1005 | ||
1006 | for_each_rxsc(secy, rx_sc) { | |
1007 | if (rx_sc->sci == sci) | |
1008 | return rx_sc; | |
1009 | } | |
1010 | ||
1011 | return NULL; | |
1012 | } | |
1013 | ||
1014 | static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) | |
1015 | { | |
1016 | struct macsec_rx_sc *rx_sc; | |
1017 | ||
1018 | for_each_rxsc_rtnl(secy, rx_sc) { | |
1019 | if (rx_sc->sci == sci) | |
1020 | return rx_sc; | |
1021 | } | |
1022 | ||
1023 | return NULL; | |
1024 | } | |
1025 | ||
1026 | static void handle_not_macsec(struct sk_buff *skb) | |
1027 | { | |
1028 | struct macsec_rxh_data *rxd; | |
1029 | struct macsec_dev *macsec; | |
1030 | ||
1031 | rcu_read_lock(); | |
1032 | rxd = macsec_data_rcu(skb->dev); | |
1033 | ||
1034 | /* 10.6 If the management control validateFrames is not | |
1035 | * Strict, frames without a SecTAG are received, counted, and | |
1036 | * delivered to the Controlled Port | |
1037 | */ | |
1038 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1039 | struct sk_buff *nskb; | |
1040 | int ret; | |
1041 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
1042 | ||
1043 | if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1044 | u64_stats_update_begin(&secy_stats->syncp); | |
1045 | secy_stats->stats.InPktsNoTag++; | |
1046 | u64_stats_update_end(&secy_stats->syncp); | |
1047 | continue; | |
1048 | } | |
1049 | ||
1050 | /* deliver on this port */ | |
1051 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1052 | if (!nskb) | |
1053 | break; | |
1054 | ||
1055 | nskb->dev = macsec->secy.netdev; | |
1056 | ||
1057 | ret = netif_rx(nskb); | |
1058 | if (ret == NET_RX_SUCCESS) { | |
1059 | u64_stats_update_begin(&secy_stats->syncp); | |
1060 | secy_stats->stats.InPktsUntagged++; | |
1061 | u64_stats_update_end(&secy_stats->syncp); | |
1062 | } else { | |
1063 | macsec->secy.netdev->stats.rx_dropped++; | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | rcu_read_unlock(); | |
1068 | } | |
1069 | ||
1070 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) | |
1071 | { | |
1072 | struct sk_buff *skb = *pskb; | |
1073 | struct net_device *dev = skb->dev; | |
1074 | struct macsec_eth_header *hdr; | |
1075 | struct macsec_secy *secy = NULL; | |
1076 | struct macsec_rx_sc *rx_sc; | |
1077 | struct macsec_rx_sa *rx_sa; | |
1078 | struct macsec_rxh_data *rxd; | |
1079 | struct macsec_dev *macsec; | |
1080 | sci_t sci; | |
1081 | u32 pn; | |
1082 | bool cbit; | |
1083 | struct pcpu_rx_sc_stats *rxsc_stats; | |
1084 | struct pcpu_secy_stats *secy_stats; | |
1085 | bool pulled_sci; | |
5491e7c6 | 1086 | int ret; |
c09440f7 SD |
1087 | |
1088 | if (skb_headroom(skb) < ETH_HLEN) | |
1089 | goto drop_direct; | |
1090 | ||
1091 | hdr = macsec_ethhdr(skb); | |
1092 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) { | |
1093 | handle_not_macsec(skb); | |
1094 | ||
1095 | /* and deliver to the uncontrolled port */ | |
1096 | return RX_HANDLER_PASS; | |
1097 | } | |
1098 | ||
1099 | skb = skb_unshare(skb, GFP_ATOMIC); | |
1100 | if (!skb) { | |
1101 | *pskb = NULL; | |
1102 | return RX_HANDLER_CONSUMED; | |
1103 | } | |
1104 | ||
1105 | pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); | |
1106 | if (!pulled_sci) { | |
1107 | if (!pskb_may_pull(skb, macsec_extra_len(false))) | |
1108 | goto drop_direct; | |
1109 | } | |
1110 | ||
1111 | hdr = macsec_ethhdr(skb); | |
1112 | ||
1113 | /* Frames with a SecTAG that has the TCI E bit set but the C | |
1114 | * bit clear are discarded, as this reserved encoding is used | |
1115 | * to identify frames with a SecTAG that are not to be | |
1116 | * delivered to the Controlled Port. | |
1117 | */ | |
1118 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) | |
1119 | return RX_HANDLER_PASS; | |
1120 | ||
1121 | /* now, pull the extra length */ | |
1122 | if (hdr->tci_an & MACSEC_TCI_SC) { | |
1123 | if (!pulled_sci) | |
1124 | goto drop_direct; | |
1125 | } | |
1126 | ||
1127 | /* ethernet header is part of crypto processing */ | |
1128 | skb_push(skb, ETH_HLEN); | |
1129 | ||
1130 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); | |
1131 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; | |
1132 | sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); | |
1133 | ||
1134 | rcu_read_lock(); | |
1135 | rxd = macsec_data_rcu(skb->dev); | |
1136 | ||
1137 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1138 | struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); | |
c78ebe1d | 1139 | sc = sc ? macsec_rxsc_get(sc) : NULL; |
c09440f7 SD |
1140 | |
1141 | if (sc) { | |
1142 | secy = &macsec->secy; | |
1143 | rx_sc = sc; | |
1144 | break; | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | if (!secy) | |
1149 | goto nosci; | |
1150 | ||
1151 | dev = secy->netdev; | |
1152 | macsec = macsec_priv(dev); | |
1153 | secy_stats = this_cpu_ptr(macsec->stats); | |
1154 | rxsc_stats = this_cpu_ptr(rx_sc->stats); | |
1155 | ||
1156 | if (!macsec_validate_skb(skb, secy->icv_len)) { | |
1157 | u64_stats_update_begin(&secy_stats->syncp); | |
1158 | secy_stats->stats.InPktsBadTag++; | |
1159 | u64_stats_update_end(&secy_stats->syncp); | |
1160 | goto drop_nosa; | |
1161 | } | |
1162 | ||
1163 | rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); | |
1164 | if (!rx_sa) { | |
1165 | /* 10.6.1 if the SA is not in use */ | |
1166 | ||
1167 | /* If validateFrames is Strict or the C bit in the | |
1168 | * SecTAG is set, discard | |
1169 | */ | |
1170 | if (hdr->tci_an & MACSEC_TCI_C || | |
1171 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
1172 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1173 | rxsc_stats->stats.InPktsNotUsingSA++; | |
1174 | u64_stats_update_end(&rxsc_stats->syncp); | |
1175 | goto drop_nosa; | |
1176 | } | |
1177 | ||
1178 | /* not Strict, the frame (with the SecTAG and ICV | |
1179 | * removed) is delivered to the Controlled Port. | |
1180 | */ | |
1181 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1182 | rxsc_stats->stats.InPktsUnusedSA++; | |
1183 | u64_stats_update_end(&rxsc_stats->syncp); | |
1184 | goto deliver; | |
1185 | } | |
1186 | ||
1187 | /* First, PN check to avoid decrypting obviously wrong packets */ | |
1188 | pn = ntohl(hdr->packet_number); | |
1189 | if (secy->replay_protect) { | |
1190 | bool late; | |
1191 | ||
1192 | spin_lock(&rx_sa->lock); | |
1193 | late = rx_sa->next_pn >= secy->replay_window && | |
1194 | pn < (rx_sa->next_pn - secy->replay_window); | |
1195 | spin_unlock(&rx_sa->lock); | |
1196 | ||
1197 | if (late) { | |
1198 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1199 | rxsc_stats->stats.InPktsLate++; | |
1200 | u64_stats_update_end(&rxsc_stats->syncp); | |
1201 | goto drop; | |
1202 | } | |
1203 | } | |
1204 | ||
e3a3b626 BG |
1205 | macsec_skb_cb(skb)->rx_sa = rx_sa; |
1206 | ||
c09440f7 SD |
1207 | /* Disabled && !changed text => skip validation */ |
1208 | if (hdr->tci_an & MACSEC_TCI_C || | |
1209 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) | |
1210 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); | |
1211 | ||
c3b7d0bd SD |
1212 | if (IS_ERR(skb)) { |
1213 | /* the decrypt callback needs the reference */ | |
c78ebe1d | 1214 | if (PTR_ERR(skb) != -EINPROGRESS) { |
c3b7d0bd | 1215 | macsec_rxsa_put(rx_sa); |
c78ebe1d SD |
1216 | macsec_rxsc_put(rx_sc); |
1217 | } | |
c09440f7 SD |
1218 | rcu_read_unlock(); |
1219 | *pskb = NULL; | |
1220 | return RX_HANDLER_CONSUMED; | |
1221 | } | |
1222 | ||
1223 | if (!macsec_post_decrypt(skb, secy, pn)) | |
1224 | goto drop; | |
1225 | ||
1226 | deliver: | |
1227 | macsec_finalize_skb(skb, secy->icv_len, | |
1228 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1229 | macsec_reset_skb(skb, secy->netdev); | |
1230 | ||
497f358a SD |
1231 | if (rx_sa) |
1232 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 1233 | macsec_rxsc_put(rx_sc); |
5491e7c6 PA |
1234 | |
1235 | ret = gro_cells_receive(&macsec->gro_cells, skb); | |
1236 | if (ret == NET_RX_SUCCESS) | |
1237 | count_rx(dev, skb->len); | |
1238 | else | |
1239 | macsec->secy.netdev->stats.rx_dropped++; | |
c09440f7 SD |
1240 | |
1241 | rcu_read_unlock(); | |
1242 | ||
5491e7c6 PA |
1243 | *pskb = NULL; |
1244 | return RX_HANDLER_CONSUMED; | |
c09440f7 SD |
1245 | |
1246 | drop: | |
1247 | macsec_rxsa_put(rx_sa); | |
1248 | drop_nosa: | |
c78ebe1d | 1249 | macsec_rxsc_put(rx_sc); |
c09440f7 SD |
1250 | rcu_read_unlock(); |
1251 | drop_direct: | |
1252 | kfree_skb(skb); | |
1253 | *pskb = NULL; | |
1254 | return RX_HANDLER_CONSUMED; | |
1255 | ||
1256 | nosci: | |
1257 | /* 10.6.1 if the SC is not found */ | |
1258 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); | |
1259 | if (!cbit) | |
1260 | macsec_finalize_skb(skb, DEFAULT_ICV_LEN, | |
1261 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1262 | ||
1263 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1264 | struct sk_buff *nskb; | |
c09440f7 SD |
1265 | |
1266 | secy_stats = this_cpu_ptr(macsec->stats); | |
1267 | ||
1268 | /* If validateFrames is Strict or the C bit in the | |
1269 | * SecTAG is set, discard | |
1270 | */ | |
1271 | if (cbit || | |
1272 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1273 | u64_stats_update_begin(&secy_stats->syncp); | |
1274 | secy_stats->stats.InPktsNoSCI++; | |
1275 | u64_stats_update_end(&secy_stats->syncp); | |
1276 | continue; | |
1277 | } | |
1278 | ||
1279 | /* not strict, the frame (with the SecTAG and ICV | |
1280 | * removed) is delivered to the Controlled Port. | |
1281 | */ | |
1282 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1283 | if (!nskb) | |
1284 | break; | |
1285 | ||
1286 | macsec_reset_skb(nskb, macsec->secy.netdev); | |
1287 | ||
1288 | ret = netif_rx(nskb); | |
1289 | if (ret == NET_RX_SUCCESS) { | |
1290 | u64_stats_update_begin(&secy_stats->syncp); | |
1291 | secy_stats->stats.InPktsUnknownSCI++; | |
1292 | u64_stats_update_end(&secy_stats->syncp); | |
1293 | } else { | |
1294 | macsec->secy.netdev->stats.rx_dropped++; | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | rcu_read_unlock(); | |
1299 | *pskb = skb; | |
1300 | return RX_HANDLER_PASS; | |
1301 | } | |
1302 | ||
1303 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) | |
1304 | { | |
1305 | struct crypto_aead *tfm; | |
1306 | int ret; | |
1307 | ||
6052f7fb | 1308 | tfm = crypto_alloc_aead("gcm(aes)", 0, 0); |
34aedfee DC |
1309 | |
1310 | if (IS_ERR(tfm)) | |
1311 | return tfm; | |
c09440f7 SD |
1312 | |
1313 | ret = crypto_aead_setkey(tfm, key, key_len); | |
34aedfee DC |
1314 | if (ret < 0) |
1315 | goto fail; | |
c09440f7 SD |
1316 | |
1317 | ret = crypto_aead_setauthsize(tfm, icv_len); | |
34aedfee DC |
1318 | if (ret < 0) |
1319 | goto fail; | |
c09440f7 SD |
1320 | |
1321 | return tfm; | |
34aedfee DC |
1322 | fail: |
1323 | crypto_free_aead(tfm); | |
1324 | return ERR_PTR(ret); | |
c09440f7 SD |
1325 | } |
1326 | ||
1327 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, | |
1328 | int icv_len) | |
1329 | { | |
1330 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); | |
1331 | if (!rx_sa->stats) | |
34aedfee | 1332 | return -ENOMEM; |
c09440f7 SD |
1333 | |
1334 | rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1335 | if (IS_ERR(rx_sa->key.tfm)) { |
c09440f7 | 1336 | free_percpu(rx_sa->stats); |
34aedfee | 1337 | return PTR_ERR(rx_sa->key.tfm); |
c09440f7 SD |
1338 | } |
1339 | ||
1340 | rx_sa->active = false; | |
1341 | rx_sa->next_pn = 1; | |
1342 | atomic_set(&rx_sa->refcnt, 1); | |
1343 | spin_lock_init(&rx_sa->lock); | |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) | |
1349 | { | |
1350 | rx_sa->active = false; | |
1351 | ||
1352 | macsec_rxsa_put(rx_sa); | |
1353 | } | |
1354 | ||
1355 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) | |
1356 | { | |
1357 | int i; | |
1358 | ||
1359 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
1360 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); | |
1361 | ||
1362 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); | |
1363 | if (sa) | |
1364 | clear_rx_sa(sa); | |
1365 | } | |
1366 | ||
1367 | macsec_rxsc_put(rx_sc); | |
1368 | } | |
1369 | ||
1370 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1371 | { | |
1372 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; | |
1373 | ||
1374 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); | |
1375 | rx_sc; | |
1376 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { | |
1377 | if (rx_sc->sci == sci) { | |
1378 | if (rx_sc->active) | |
1379 | secy->n_rx_sc--; | |
1380 | rcu_assign_pointer(*rx_scp, rx_sc->next); | |
1381 | return rx_sc; | |
1382 | } | |
1383 | } | |
1384 | ||
1385 | return NULL; | |
1386 | } | |
1387 | ||
1388 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci) | |
1389 | { | |
1390 | struct macsec_rx_sc *rx_sc; | |
1391 | struct macsec_dev *macsec; | |
1392 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
1393 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
1394 | struct macsec_secy *secy; | |
1395 | ||
1396 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
1397 | if (find_rx_sc_rtnl(&macsec->secy, sci)) | |
1398 | return ERR_PTR(-EEXIST); | |
1399 | } | |
1400 | ||
1401 | rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); | |
1402 | if (!rx_sc) | |
1403 | return ERR_PTR(-ENOMEM); | |
1404 | ||
1405 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); | |
1406 | if (!rx_sc->stats) { | |
1407 | kfree(rx_sc); | |
1408 | return ERR_PTR(-ENOMEM); | |
1409 | } | |
1410 | ||
1411 | rx_sc->sci = sci; | |
1412 | rx_sc->active = true; | |
1413 | atomic_set(&rx_sc->refcnt, 1); | |
1414 | ||
1415 | secy = &macsec_priv(dev)->secy; | |
1416 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); | |
1417 | rcu_assign_pointer(secy->rx_sc, rx_sc); | |
1418 | ||
1419 | if (rx_sc->active) | |
1420 | secy->n_rx_sc++; | |
1421 | ||
1422 | return rx_sc; | |
1423 | } | |
1424 | ||
1425 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, | |
1426 | int icv_len) | |
1427 | { | |
1428 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); | |
1429 | if (!tx_sa->stats) | |
34aedfee | 1430 | return -ENOMEM; |
c09440f7 SD |
1431 | |
1432 | tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1433 | if (IS_ERR(tx_sa->key.tfm)) { |
c09440f7 | 1434 | free_percpu(tx_sa->stats); |
34aedfee | 1435 | return PTR_ERR(tx_sa->key.tfm); |
c09440f7 SD |
1436 | } |
1437 | ||
1438 | tx_sa->active = false; | |
1439 | atomic_set(&tx_sa->refcnt, 1); | |
1440 | spin_lock_init(&tx_sa->lock); | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | ||
1445 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) | |
1446 | { | |
1447 | tx_sa->active = false; | |
1448 | ||
1449 | macsec_txsa_put(tx_sa); | |
1450 | } | |
1451 | ||
489111e5 | 1452 | static struct genl_family macsec_fam; |
c09440f7 SD |
1453 | |
1454 | static struct net_device *get_dev_from_nl(struct net *net, | |
1455 | struct nlattr **attrs) | |
1456 | { | |
1457 | int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); | |
1458 | struct net_device *dev; | |
1459 | ||
1460 | dev = __dev_get_by_index(net, ifindex); | |
1461 | if (!dev) | |
1462 | return ERR_PTR(-ENODEV); | |
1463 | ||
1464 | if (!netif_is_macsec(dev)) | |
1465 | return ERR_PTR(-ENODEV); | |
1466 | ||
1467 | return dev; | |
1468 | } | |
1469 | ||
1470 | static sci_t nla_get_sci(const struct nlattr *nla) | |
1471 | { | |
1472 | return (__force sci_t)nla_get_u64(nla); | |
1473 | } | |
1474 | ||
f60d94c0 ND |
1475 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1476 | int padattr) | |
c09440f7 | 1477 | { |
f60d94c0 | 1478 | return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
c09440f7 SD |
1479 | } |
1480 | ||
1481 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, | |
1482 | struct nlattr **attrs, | |
1483 | struct nlattr **tb_sa, | |
1484 | struct net_device **devp, | |
1485 | struct macsec_secy **secyp, | |
1486 | struct macsec_tx_sc **scp, | |
1487 | u8 *assoc_num) | |
1488 | { | |
1489 | struct net_device *dev; | |
1490 | struct macsec_secy *secy; | |
1491 | struct macsec_tx_sc *tx_sc; | |
1492 | struct macsec_tx_sa *tx_sa; | |
1493 | ||
1494 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1495 | return ERR_PTR(-EINVAL); | |
1496 | ||
1497 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1498 | ||
1499 | dev = get_dev_from_nl(net, attrs); | |
1500 | if (IS_ERR(dev)) | |
1501 | return ERR_CAST(dev); | |
1502 | ||
1503 | if (*assoc_num >= MACSEC_NUM_AN) | |
1504 | return ERR_PTR(-EINVAL); | |
1505 | ||
1506 | secy = &macsec_priv(dev)->secy; | |
1507 | tx_sc = &secy->tx_sc; | |
1508 | ||
1509 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); | |
1510 | if (!tx_sa) | |
1511 | return ERR_PTR(-ENODEV); | |
1512 | ||
1513 | *devp = dev; | |
1514 | *scp = tx_sc; | |
1515 | *secyp = secy; | |
1516 | return tx_sa; | |
1517 | } | |
1518 | ||
1519 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, | |
1520 | struct nlattr **attrs, | |
1521 | struct nlattr **tb_rxsc, | |
1522 | struct net_device **devp, | |
1523 | struct macsec_secy **secyp) | |
1524 | { | |
1525 | struct net_device *dev; | |
1526 | struct macsec_secy *secy; | |
1527 | struct macsec_rx_sc *rx_sc; | |
1528 | sci_t sci; | |
1529 | ||
1530 | dev = get_dev_from_nl(net, attrs); | |
1531 | if (IS_ERR(dev)) | |
1532 | return ERR_CAST(dev); | |
1533 | ||
1534 | secy = &macsec_priv(dev)->secy; | |
1535 | ||
1536 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1537 | return ERR_PTR(-EINVAL); | |
1538 | ||
1539 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1540 | rx_sc = find_rx_sc_rtnl(secy, sci); | |
1541 | if (!rx_sc) | |
1542 | return ERR_PTR(-ENODEV); | |
1543 | ||
1544 | *secyp = secy; | |
1545 | *devp = dev; | |
1546 | ||
1547 | return rx_sc; | |
1548 | } | |
1549 | ||
1550 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, | |
1551 | struct nlattr **attrs, | |
1552 | struct nlattr **tb_rxsc, | |
1553 | struct nlattr **tb_sa, | |
1554 | struct net_device **devp, | |
1555 | struct macsec_secy **secyp, | |
1556 | struct macsec_rx_sc **scp, | |
1557 | u8 *assoc_num) | |
1558 | { | |
1559 | struct macsec_rx_sc *rx_sc; | |
1560 | struct macsec_rx_sa *rx_sa; | |
1561 | ||
1562 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1563 | return ERR_PTR(-EINVAL); | |
1564 | ||
1565 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1566 | if (*assoc_num >= MACSEC_NUM_AN) | |
1567 | return ERR_PTR(-EINVAL); | |
1568 | ||
1569 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); | |
1570 | if (IS_ERR(rx_sc)) | |
1571 | return ERR_CAST(rx_sc); | |
1572 | ||
1573 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); | |
1574 | if (!rx_sa) | |
1575 | return ERR_PTR(-ENODEV); | |
1576 | ||
1577 | *scp = rx_sc; | |
1578 | return rx_sa; | |
1579 | } | |
1580 | ||
1581 | ||
1582 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { | |
1583 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
1584 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, | |
1585 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, | |
1586 | }; | |
1587 | ||
1588 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { | |
1589 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, | |
1590 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1591 | }; | |
1592 | ||
1593 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { | |
1594 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, | |
1595 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1596 | [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 }, | |
8acca6ac SD |
1597 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1598 | .len = MACSEC_KEYID_LEN, }, | |
c09440f7 SD |
1599 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
1600 | .len = MACSEC_MAX_KEY_LEN, }, | |
1601 | }; | |
1602 | ||
1603 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) | |
1604 | { | |
1605 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) | |
1606 | return -EINVAL; | |
1607 | ||
fceb6435 JB |
1608 | if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX, |
1609 | attrs[MACSEC_ATTR_SA_CONFIG], | |
1610 | macsec_genl_sa_policy, NULL)) | |
c09440f7 SD |
1611 | return -EINVAL; |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) | |
1617 | { | |
1618 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) | |
1619 | return -EINVAL; | |
1620 | ||
fceb6435 JB |
1621 | if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX, |
1622 | attrs[MACSEC_ATTR_RXSC_CONFIG], | |
1623 | macsec_genl_rxsc_policy, NULL)) | |
c09440f7 SD |
1624 | return -EINVAL; |
1625 | ||
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | static bool validate_add_rxsa(struct nlattr **attrs) | |
1630 | { | |
1631 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1632 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1633 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1634 | return false; | |
1635 | ||
1636 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1637 | return false; | |
1638 | ||
1639 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1640 | return false; | |
1641 | ||
1642 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1643 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1644 | return false; | |
1645 | } | |
1646 | ||
8acca6ac SD |
1647 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1648 | return false; | |
1649 | ||
c09440f7 SD |
1650 | return true; |
1651 | } | |
1652 | ||
1653 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1654 | { | |
1655 | struct net_device *dev; | |
1656 | struct nlattr **attrs = info->attrs; | |
1657 | struct macsec_secy *secy; | |
1658 | struct macsec_rx_sc *rx_sc; | |
1659 | struct macsec_rx_sa *rx_sa; | |
1660 | unsigned char assoc_num; | |
1661 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1662 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1663 | int err; |
c09440f7 SD |
1664 | |
1665 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1666 | return -EINVAL; | |
1667 | ||
1668 | if (parse_sa_config(attrs, tb_sa)) | |
1669 | return -EINVAL; | |
1670 | ||
1671 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1672 | return -EINVAL; | |
1673 | ||
1674 | if (!validate_add_rxsa(tb_sa)) | |
1675 | return -EINVAL; | |
1676 | ||
1677 | rtnl_lock(); | |
1678 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
36b232c8 | 1679 | if (IS_ERR(rx_sc)) { |
c09440f7 SD |
1680 | rtnl_unlock(); |
1681 | return PTR_ERR(rx_sc); | |
1682 | } | |
1683 | ||
1684 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1685 | ||
1686 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1687 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", | |
1688 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1689 | rtnl_unlock(); | |
1690 | return -EINVAL; | |
1691 | } | |
1692 | ||
1693 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); | |
1694 | if (rx_sa) { | |
1695 | rtnl_unlock(); | |
1696 | return -EBUSY; | |
1697 | } | |
1698 | ||
1699 | rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); | |
34aedfee | 1700 | if (!rx_sa) { |
c09440f7 SD |
1701 | rtnl_unlock(); |
1702 | return -ENOMEM; | |
1703 | } | |
1704 | ||
34aedfee DC |
1705 | err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1706 | secy->key_len, secy->icv_len); | |
1707 | if (err < 0) { | |
1708 | kfree(rx_sa); | |
1709 | rtnl_unlock(); | |
1710 | return err; | |
1711 | } | |
1712 | ||
c09440f7 SD |
1713 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
1714 | spin_lock_bh(&rx_sa->lock); | |
1715 | rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
1716 | spin_unlock_bh(&rx_sa->lock); | |
1717 | } | |
1718 | ||
1719 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1720 | rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1721 | ||
1968a0b8 | 1722 | nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
c09440f7 SD |
1723 | rx_sa->sc = rx_sc; |
1724 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); | |
1725 | ||
1726 | rtnl_unlock(); | |
1727 | ||
1728 | return 0; | |
1729 | } | |
1730 | ||
1731 | static bool validate_add_rxsc(struct nlattr **attrs) | |
1732 | { | |
1733 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) | |
1734 | return false; | |
1735 | ||
1736 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { | |
1737 | if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) | |
1738 | return false; | |
1739 | } | |
1740 | ||
1741 | return true; | |
1742 | } | |
1743 | ||
1744 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1745 | { | |
1746 | struct net_device *dev; | |
1747 | sci_t sci = MACSEC_UNDEF_SCI; | |
1748 | struct nlattr **attrs = info->attrs; | |
1749 | struct macsec_rx_sc *rx_sc; | |
1750 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1751 | ||
1752 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1753 | return -EINVAL; | |
1754 | ||
1755 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1756 | return -EINVAL; | |
1757 | ||
1758 | if (!validate_add_rxsc(tb_rxsc)) | |
1759 | return -EINVAL; | |
1760 | ||
1761 | rtnl_lock(); | |
1762 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1763 | if (IS_ERR(dev)) { | |
1764 | rtnl_unlock(); | |
1765 | return PTR_ERR(dev); | |
1766 | } | |
1767 | ||
1768 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1769 | ||
1770 | rx_sc = create_rx_sc(dev, sci); | |
1771 | if (IS_ERR(rx_sc)) { | |
1772 | rtnl_unlock(); | |
1773 | return PTR_ERR(rx_sc); | |
1774 | } | |
1775 | ||
1776 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) | |
1777 | rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
1778 | ||
1779 | rtnl_unlock(); | |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | static bool validate_add_txsa(struct nlattr **attrs) | |
1785 | { | |
1786 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1787 | !attrs[MACSEC_SA_ATTR_PN] || | |
1788 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1789 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1790 | return false; | |
1791 | ||
1792 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1793 | return false; | |
1794 | ||
1795 | if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1796 | return false; | |
1797 | ||
1798 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1799 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1800 | return false; | |
1801 | } | |
1802 | ||
8acca6ac SD |
1803 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1804 | return false; | |
1805 | ||
c09440f7 SD |
1806 | return true; |
1807 | } | |
1808 | ||
1809 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) | |
1810 | { | |
1811 | struct net_device *dev; | |
1812 | struct nlattr **attrs = info->attrs; | |
1813 | struct macsec_secy *secy; | |
1814 | struct macsec_tx_sc *tx_sc; | |
1815 | struct macsec_tx_sa *tx_sa; | |
1816 | unsigned char assoc_num; | |
1817 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1818 | int err; |
c09440f7 SD |
1819 | |
1820 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1821 | return -EINVAL; | |
1822 | ||
1823 | if (parse_sa_config(attrs, tb_sa)) | |
1824 | return -EINVAL; | |
1825 | ||
1826 | if (!validate_add_txsa(tb_sa)) | |
1827 | return -EINVAL; | |
1828 | ||
1829 | rtnl_lock(); | |
1830 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1831 | if (IS_ERR(dev)) { | |
1832 | rtnl_unlock(); | |
1833 | return PTR_ERR(dev); | |
1834 | } | |
1835 | ||
1836 | secy = &macsec_priv(dev)->secy; | |
1837 | tx_sc = &secy->tx_sc; | |
1838 | ||
1839 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1840 | ||
1841 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1842 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", | |
1843 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1844 | rtnl_unlock(); | |
1845 | return -EINVAL; | |
1846 | } | |
1847 | ||
1848 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); | |
1849 | if (tx_sa) { | |
1850 | rtnl_unlock(); | |
1851 | return -EBUSY; | |
1852 | } | |
1853 | ||
1854 | tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); | |
34aedfee | 1855 | if (!tx_sa) { |
c09440f7 SD |
1856 | rtnl_unlock(); |
1857 | return -ENOMEM; | |
1858 | } | |
1859 | ||
34aedfee DC |
1860 | err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1861 | secy->key_len, secy->icv_len); | |
1862 | if (err < 0) { | |
1863 | kfree(tx_sa); | |
1864 | rtnl_unlock(); | |
1865 | return err; | |
1866 | } | |
1867 | ||
1968a0b8 | 1868 | nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
c09440f7 SD |
1869 | |
1870 | spin_lock_bh(&tx_sa->lock); | |
1871 | tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
1872 | spin_unlock_bh(&tx_sa->lock); | |
1873 | ||
1874 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1875 | tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1876 | ||
1877 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) | |
1878 | secy->operational = true; | |
1879 | ||
1880 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); | |
1881 | ||
1882 | rtnl_unlock(); | |
1883 | ||
1884 | return 0; | |
1885 | } | |
1886 | ||
1887 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1888 | { | |
1889 | struct nlattr **attrs = info->attrs; | |
1890 | struct net_device *dev; | |
1891 | struct macsec_secy *secy; | |
1892 | struct macsec_rx_sc *rx_sc; | |
1893 | struct macsec_rx_sa *rx_sa; | |
1894 | u8 assoc_num; | |
1895 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1896 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1897 | ||
1898 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1899 | return -EINVAL; | |
1900 | ||
1901 | if (parse_sa_config(attrs, tb_sa)) | |
1902 | return -EINVAL; | |
1903 | ||
1904 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1905 | return -EINVAL; | |
1906 | ||
1907 | rtnl_lock(); | |
1908 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
1909 | &dev, &secy, &rx_sc, &assoc_num); | |
1910 | if (IS_ERR(rx_sa)) { | |
1911 | rtnl_unlock(); | |
1912 | return PTR_ERR(rx_sa); | |
1913 | } | |
1914 | ||
1915 | if (rx_sa->active) { | |
1916 | rtnl_unlock(); | |
1917 | return -EBUSY; | |
1918 | } | |
1919 | ||
1920 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); | |
1921 | clear_rx_sa(rx_sa); | |
1922 | ||
1923 | rtnl_unlock(); | |
1924 | ||
1925 | return 0; | |
1926 | } | |
1927 | ||
1928 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1929 | { | |
1930 | struct nlattr **attrs = info->attrs; | |
1931 | struct net_device *dev; | |
1932 | struct macsec_secy *secy; | |
1933 | struct macsec_rx_sc *rx_sc; | |
1934 | sci_t sci; | |
1935 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1936 | ||
1937 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1938 | return -EINVAL; | |
1939 | ||
1940 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1941 | return -EINVAL; | |
1942 | ||
1943 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1944 | return -EINVAL; | |
1945 | ||
1946 | rtnl_lock(); | |
1947 | dev = get_dev_from_nl(genl_info_net(info), info->attrs); | |
1948 | if (IS_ERR(dev)) { | |
1949 | rtnl_unlock(); | |
1950 | return PTR_ERR(dev); | |
1951 | } | |
1952 | ||
1953 | secy = &macsec_priv(dev)->secy; | |
1954 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1955 | ||
1956 | rx_sc = del_rx_sc(secy, sci); | |
1957 | if (!rx_sc) { | |
1958 | rtnl_unlock(); | |
1959 | return -ENODEV; | |
1960 | } | |
1961 | ||
1962 | free_rx_sc(rx_sc); | |
1963 | rtnl_unlock(); | |
1964 | ||
1965 | return 0; | |
1966 | } | |
1967 | ||
1968 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) | |
1969 | { | |
1970 | struct nlattr **attrs = info->attrs; | |
1971 | struct net_device *dev; | |
1972 | struct macsec_secy *secy; | |
1973 | struct macsec_tx_sc *tx_sc; | |
1974 | struct macsec_tx_sa *tx_sa; | |
1975 | u8 assoc_num; | |
1976 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1977 | ||
1978 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1979 | return -EINVAL; | |
1980 | ||
1981 | if (parse_sa_config(attrs, tb_sa)) | |
1982 | return -EINVAL; | |
1983 | ||
1984 | rtnl_lock(); | |
1985 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
1986 | &dev, &secy, &tx_sc, &assoc_num); | |
1987 | if (IS_ERR(tx_sa)) { | |
1988 | rtnl_unlock(); | |
1989 | return PTR_ERR(tx_sa); | |
1990 | } | |
1991 | ||
1992 | if (tx_sa->active) { | |
1993 | rtnl_unlock(); | |
1994 | return -EBUSY; | |
1995 | } | |
1996 | ||
1997 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); | |
1998 | clear_tx_sa(tx_sa); | |
1999 | ||
2000 | rtnl_unlock(); | |
2001 | ||
2002 | return 0; | |
2003 | } | |
2004 | ||
2005 | static bool validate_upd_sa(struct nlattr **attrs) | |
2006 | { | |
2007 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
2008 | attrs[MACSEC_SA_ATTR_KEY] || | |
2009 | attrs[MACSEC_SA_ATTR_KEYID]) | |
2010 | return false; | |
2011 | ||
2012 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
2013 | return false; | |
2014 | ||
2015 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
2016 | return false; | |
2017 | ||
2018 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
2019 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
2020 | return false; | |
2021 | } | |
2022 | ||
2023 | return true; | |
2024 | } | |
2025 | ||
2026 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) | |
2027 | { | |
2028 | struct nlattr **attrs = info->attrs; | |
2029 | struct net_device *dev; | |
2030 | struct macsec_secy *secy; | |
2031 | struct macsec_tx_sc *tx_sc; | |
2032 | struct macsec_tx_sa *tx_sa; | |
2033 | u8 assoc_num; | |
2034 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
2035 | ||
2036 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2037 | return -EINVAL; | |
2038 | ||
2039 | if (parse_sa_config(attrs, tb_sa)) | |
2040 | return -EINVAL; | |
2041 | ||
2042 | if (!validate_upd_sa(tb_sa)) | |
2043 | return -EINVAL; | |
2044 | ||
2045 | rtnl_lock(); | |
2046 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2047 | &dev, &secy, &tx_sc, &assoc_num); | |
2048 | if (IS_ERR(tx_sa)) { | |
2049 | rtnl_unlock(); | |
2050 | return PTR_ERR(tx_sa); | |
2051 | } | |
2052 | ||
2053 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2054 | spin_lock_bh(&tx_sa->lock); | |
2055 | tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
2056 | spin_unlock_bh(&tx_sa->lock); | |
2057 | } | |
2058 | ||
2059 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2060 | tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2061 | ||
2062 | if (assoc_num == tx_sc->encoding_sa) | |
2063 | secy->operational = tx_sa->active; | |
2064 | ||
2065 | rtnl_unlock(); | |
2066 | ||
2067 | return 0; | |
2068 | } | |
2069 | ||
2070 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2071 | { | |
2072 | struct nlattr **attrs = info->attrs; | |
2073 | struct net_device *dev; | |
2074 | struct macsec_secy *secy; | |
2075 | struct macsec_rx_sc *rx_sc; | |
2076 | struct macsec_rx_sa *rx_sa; | |
2077 | u8 assoc_num; | |
2078 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2079 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
2080 | ||
2081 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2082 | return -EINVAL; | |
2083 | ||
2084 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2085 | return -EINVAL; | |
2086 | ||
2087 | if (parse_sa_config(attrs, tb_sa)) | |
2088 | return -EINVAL; | |
2089 | ||
2090 | if (!validate_upd_sa(tb_sa)) | |
2091 | return -EINVAL; | |
2092 | ||
2093 | rtnl_lock(); | |
2094 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2095 | &dev, &secy, &rx_sc, &assoc_num); | |
2096 | if (IS_ERR(rx_sa)) { | |
2097 | rtnl_unlock(); | |
2098 | return PTR_ERR(rx_sa); | |
2099 | } | |
2100 | ||
2101 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2102 | spin_lock_bh(&rx_sa->lock); | |
2103 | rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
2104 | spin_unlock_bh(&rx_sa->lock); | |
2105 | } | |
2106 | ||
2107 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2108 | rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2109 | ||
2110 | rtnl_unlock(); | |
2111 | return 0; | |
2112 | } | |
2113 | ||
2114 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2115 | { | |
2116 | struct nlattr **attrs = info->attrs; | |
2117 | struct net_device *dev; | |
2118 | struct macsec_secy *secy; | |
2119 | struct macsec_rx_sc *rx_sc; | |
2120 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2121 | ||
2122 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2123 | return -EINVAL; | |
2124 | ||
2125 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2126 | return -EINVAL; | |
2127 | ||
2128 | if (!validate_add_rxsc(tb_rxsc)) | |
2129 | return -EINVAL; | |
2130 | ||
2131 | rtnl_lock(); | |
2132 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
2133 | if (IS_ERR(rx_sc)) { | |
2134 | rtnl_unlock(); | |
2135 | return PTR_ERR(rx_sc); | |
2136 | } | |
2137 | ||
2138 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { | |
2139 | bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
2140 | ||
2141 | if (rx_sc->active != new) | |
2142 | secy->n_rx_sc += new ? 1 : -1; | |
2143 | ||
2144 | rx_sc->active = new; | |
2145 | } | |
2146 | ||
2147 | rtnl_unlock(); | |
2148 | ||
2149 | return 0; | |
2150 | } | |
2151 | ||
2152 | static int copy_tx_sa_stats(struct sk_buff *skb, | |
2153 | struct macsec_tx_sa_stats __percpu *pstats) | |
2154 | { | |
2155 | struct macsec_tx_sa_stats sum = {0, }; | |
2156 | int cpu; | |
2157 | ||
2158 | for_each_possible_cpu(cpu) { | |
2159 | const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu); | |
2160 | ||
2161 | sum.OutPktsProtected += stats->OutPktsProtected; | |
2162 | sum.OutPktsEncrypted += stats->OutPktsEncrypted; | |
2163 | } | |
2164 | ||
2165 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) || | |
2166 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted)) | |
2167 | return -EMSGSIZE; | |
2168 | ||
2169 | return 0; | |
2170 | } | |
2171 | ||
2172 | static int copy_rx_sa_stats(struct sk_buff *skb, | |
2173 | struct macsec_rx_sa_stats __percpu *pstats) | |
2174 | { | |
2175 | struct macsec_rx_sa_stats sum = {0, }; | |
2176 | int cpu; | |
2177 | ||
2178 | for_each_possible_cpu(cpu) { | |
2179 | const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu); | |
2180 | ||
2181 | sum.InPktsOK += stats->InPktsOK; | |
2182 | sum.InPktsInvalid += stats->InPktsInvalid; | |
2183 | sum.InPktsNotValid += stats->InPktsNotValid; | |
2184 | sum.InPktsNotUsingSA += stats->InPktsNotUsingSA; | |
2185 | sum.InPktsUnusedSA += stats->InPktsUnusedSA; | |
2186 | } | |
2187 | ||
2188 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) || | |
2189 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) || | |
2190 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) || | |
2191 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) || | |
2192 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA)) | |
2193 | return -EMSGSIZE; | |
2194 | ||
2195 | return 0; | |
2196 | } | |
2197 | ||
2198 | static int copy_rx_sc_stats(struct sk_buff *skb, | |
2199 | struct pcpu_rx_sc_stats __percpu *pstats) | |
2200 | { | |
2201 | struct macsec_rx_sc_stats sum = {0, }; | |
2202 | int cpu; | |
2203 | ||
2204 | for_each_possible_cpu(cpu) { | |
2205 | const struct pcpu_rx_sc_stats *stats; | |
2206 | struct macsec_rx_sc_stats tmp; | |
2207 | unsigned int start; | |
2208 | ||
2209 | stats = per_cpu_ptr(pstats, cpu); | |
2210 | do { | |
2211 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2212 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2213 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2214 | ||
2215 | sum.InOctetsValidated += tmp.InOctetsValidated; | |
2216 | sum.InOctetsDecrypted += tmp.InOctetsDecrypted; | |
2217 | sum.InPktsUnchecked += tmp.InPktsUnchecked; | |
2218 | sum.InPktsDelayed += tmp.InPktsDelayed; | |
2219 | sum.InPktsOK += tmp.InPktsOK; | |
2220 | sum.InPktsInvalid += tmp.InPktsInvalid; | |
2221 | sum.InPktsLate += tmp.InPktsLate; | |
2222 | sum.InPktsNotValid += tmp.InPktsNotValid; | |
2223 | sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA; | |
2224 | sum.InPktsUnusedSA += tmp.InPktsUnusedSA; | |
2225 | } | |
2226 | ||
f60d94c0 ND |
2227 | if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
2228 | sum.InOctetsValidated, | |
2229 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2230 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, | |
2231 | sum.InOctetsDecrypted, | |
2232 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2233 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, | |
2234 | sum.InPktsUnchecked, | |
2235 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2236 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, | |
2237 | sum.InPktsDelayed, | |
2238 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2239 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, | |
2240 | sum.InPktsOK, | |
2241 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2242 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, | |
2243 | sum.InPktsInvalid, | |
2244 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2245 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, | |
2246 | sum.InPktsLate, | |
2247 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2248 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, | |
2249 | sum.InPktsNotValid, | |
2250 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2251 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
2252 | sum.InPktsNotUsingSA, | |
2253 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2254 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
2255 | sum.InPktsUnusedSA, | |
2256 | MACSEC_RXSC_STATS_ATTR_PAD)) | |
c09440f7 SD |
2257 | return -EMSGSIZE; |
2258 | ||
2259 | return 0; | |
2260 | } | |
2261 | ||
2262 | static int copy_tx_sc_stats(struct sk_buff *skb, | |
2263 | struct pcpu_tx_sc_stats __percpu *pstats) | |
2264 | { | |
2265 | struct macsec_tx_sc_stats sum = {0, }; | |
2266 | int cpu; | |
2267 | ||
2268 | for_each_possible_cpu(cpu) { | |
2269 | const struct pcpu_tx_sc_stats *stats; | |
2270 | struct macsec_tx_sc_stats tmp; | |
2271 | unsigned int start; | |
2272 | ||
2273 | stats = per_cpu_ptr(pstats, cpu); | |
2274 | do { | |
2275 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2276 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2277 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2278 | ||
2279 | sum.OutPktsProtected += tmp.OutPktsProtected; | |
2280 | sum.OutPktsEncrypted += tmp.OutPktsEncrypted; | |
2281 | sum.OutOctetsProtected += tmp.OutOctetsProtected; | |
2282 | sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted; | |
2283 | } | |
2284 | ||
f60d94c0 ND |
2285 | if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
2286 | sum.OutPktsProtected, | |
2287 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2288 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
2289 | sum.OutPktsEncrypted, | |
2290 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2291 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, | |
2292 | sum.OutOctetsProtected, | |
2293 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2294 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, | |
2295 | sum.OutOctetsEncrypted, | |
2296 | MACSEC_TXSC_STATS_ATTR_PAD)) | |
c09440f7 SD |
2297 | return -EMSGSIZE; |
2298 | ||
2299 | return 0; | |
2300 | } | |
2301 | ||
2302 | static int copy_secy_stats(struct sk_buff *skb, | |
2303 | struct pcpu_secy_stats __percpu *pstats) | |
2304 | { | |
2305 | struct macsec_dev_stats sum = {0, }; | |
2306 | int cpu; | |
2307 | ||
2308 | for_each_possible_cpu(cpu) { | |
2309 | const struct pcpu_secy_stats *stats; | |
2310 | struct macsec_dev_stats tmp; | |
2311 | unsigned int start; | |
2312 | ||
2313 | stats = per_cpu_ptr(pstats, cpu); | |
2314 | do { | |
2315 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2316 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2317 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2318 | ||
2319 | sum.OutPktsUntagged += tmp.OutPktsUntagged; | |
2320 | sum.InPktsUntagged += tmp.InPktsUntagged; | |
2321 | sum.OutPktsTooLong += tmp.OutPktsTooLong; | |
2322 | sum.InPktsNoTag += tmp.InPktsNoTag; | |
2323 | sum.InPktsBadTag += tmp.InPktsBadTag; | |
2324 | sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI; | |
2325 | sum.InPktsNoSCI += tmp.InPktsNoSCI; | |
2326 | sum.InPktsOverrun += tmp.InPktsOverrun; | |
2327 | } | |
2328 | ||
f60d94c0 ND |
2329 | if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
2330 | sum.OutPktsUntagged, | |
2331 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2332 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, | |
2333 | sum.InPktsUntagged, | |
2334 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2335 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, | |
2336 | sum.OutPktsTooLong, | |
2337 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2338 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, | |
2339 | sum.InPktsNoTag, | |
2340 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2341 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, | |
2342 | sum.InPktsBadTag, | |
2343 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2344 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, | |
2345 | sum.InPktsUnknownSCI, | |
2346 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2347 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, | |
2348 | sum.InPktsNoSCI, | |
2349 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2350 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, | |
2351 | sum.InPktsOverrun, | |
2352 | MACSEC_SECY_STATS_ATTR_PAD)) | |
c09440f7 SD |
2353 | return -EMSGSIZE; |
2354 | ||
2355 | return 0; | |
2356 | } | |
2357 | ||
2358 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) | |
2359 | { | |
2360 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2361 | struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY); | |
2362 | ||
2363 | if (!secy_nest) | |
2364 | return 1; | |
2365 | ||
f60d94c0 ND |
2366 | if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
2367 | MACSEC_SECY_ATTR_PAD) || | |
2368 | nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, | |
c0cc5316 | 2369 | MACSEC_DEFAULT_CIPHER_ID, |
f60d94c0 | 2370 | MACSEC_SECY_ATTR_PAD) || |
c09440f7 SD |
2371 | nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
2372 | nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || | |
2373 | nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || | |
2374 | nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || | |
2375 | nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || | |
2376 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || | |
2377 | nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || | |
2378 | nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || | |
2379 | nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || | |
2380 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) | |
2381 | goto cancel; | |
2382 | ||
2383 | if (secy->replay_protect) { | |
2384 | if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) | |
2385 | goto cancel; | |
2386 | } | |
2387 | ||
2388 | nla_nest_end(skb, secy_nest); | |
2389 | return 0; | |
2390 | ||
2391 | cancel: | |
2392 | nla_nest_cancel(skb, secy_nest); | |
2393 | return 1; | |
2394 | } | |
2395 | ||
2396 | static int dump_secy(struct macsec_secy *secy, struct net_device *dev, | |
2397 | struct sk_buff *skb, struct netlink_callback *cb) | |
2398 | { | |
2399 | struct macsec_rx_sc *rx_sc; | |
2400 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2401 | struct nlattr *txsa_list, *rxsc_list; | |
2402 | int i, j; | |
2403 | void *hdr; | |
2404 | struct nlattr *attr; | |
2405 | ||
2406 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2407 | &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); | |
2408 | if (!hdr) | |
2409 | return -EMSGSIZE; | |
2410 | ||
96cfc505 | 2411 | genl_dump_check_consistent(cb, hdr, &macsec_fam); |
c09440f7 SD |
2412 | |
2413 | if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) | |
2414 | goto nla_put_failure; | |
2415 | ||
2416 | if (nla_put_secy(secy, skb)) | |
2417 | goto nla_put_failure; | |
2418 | ||
2419 | attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS); | |
2420 | if (!attr) | |
2421 | goto nla_put_failure; | |
2422 | if (copy_tx_sc_stats(skb, tx_sc->stats)) { | |
2423 | nla_nest_cancel(skb, attr); | |
2424 | goto nla_put_failure; | |
2425 | } | |
2426 | nla_nest_end(skb, attr); | |
2427 | ||
2428 | attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS); | |
2429 | if (!attr) | |
2430 | goto nla_put_failure; | |
2431 | if (copy_secy_stats(skb, macsec_priv(dev)->stats)) { | |
2432 | nla_nest_cancel(skb, attr); | |
2433 | goto nla_put_failure; | |
2434 | } | |
2435 | nla_nest_end(skb, attr); | |
2436 | ||
2437 | txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST); | |
2438 | if (!txsa_list) | |
2439 | goto nla_put_failure; | |
2440 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { | |
2441 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); | |
2442 | struct nlattr *txsa_nest; | |
2443 | ||
2444 | if (!tx_sa) | |
2445 | continue; | |
2446 | ||
2447 | txsa_nest = nla_nest_start(skb, j++); | |
2448 | if (!txsa_nest) { | |
2449 | nla_nest_cancel(skb, txsa_list); | |
2450 | goto nla_put_failure; | |
2451 | } | |
2452 | ||
2453 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || | |
2454 | nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) || | |
8acca6ac | 2455 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
c09440f7 SD |
2456 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
2457 | nla_nest_cancel(skb, txsa_nest); | |
2458 | nla_nest_cancel(skb, txsa_list); | |
2459 | goto nla_put_failure; | |
2460 | } | |
2461 | ||
2462 | attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS); | |
2463 | if (!attr) { | |
2464 | nla_nest_cancel(skb, txsa_nest); | |
2465 | nla_nest_cancel(skb, txsa_list); | |
2466 | goto nla_put_failure; | |
2467 | } | |
2468 | if (copy_tx_sa_stats(skb, tx_sa->stats)) { | |
2469 | nla_nest_cancel(skb, attr); | |
2470 | nla_nest_cancel(skb, txsa_nest); | |
2471 | nla_nest_cancel(skb, txsa_list); | |
2472 | goto nla_put_failure; | |
2473 | } | |
2474 | nla_nest_end(skb, attr); | |
2475 | ||
2476 | nla_nest_end(skb, txsa_nest); | |
2477 | } | |
2478 | nla_nest_end(skb, txsa_list); | |
2479 | ||
2480 | rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST); | |
2481 | if (!rxsc_list) | |
2482 | goto nla_put_failure; | |
2483 | ||
2484 | j = 1; | |
2485 | for_each_rxsc_rtnl(secy, rx_sc) { | |
2486 | int k; | |
2487 | struct nlattr *rxsa_list; | |
2488 | struct nlattr *rxsc_nest = nla_nest_start(skb, j++); | |
2489 | ||
2490 | if (!rxsc_nest) { | |
2491 | nla_nest_cancel(skb, rxsc_list); | |
2492 | goto nla_put_failure; | |
2493 | } | |
2494 | ||
2495 | if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || | |
f60d94c0 ND |
2496 | nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
2497 | MACSEC_RXSC_ATTR_PAD)) { | |
c09440f7 SD |
2498 | nla_nest_cancel(skb, rxsc_nest); |
2499 | nla_nest_cancel(skb, rxsc_list); | |
2500 | goto nla_put_failure; | |
2501 | } | |
2502 | ||
2503 | attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS); | |
2504 | if (!attr) { | |
2505 | nla_nest_cancel(skb, rxsc_nest); | |
2506 | nla_nest_cancel(skb, rxsc_list); | |
2507 | goto nla_put_failure; | |
2508 | } | |
2509 | if (copy_rx_sc_stats(skb, rx_sc->stats)) { | |
2510 | nla_nest_cancel(skb, attr); | |
2511 | nla_nest_cancel(skb, rxsc_nest); | |
2512 | nla_nest_cancel(skb, rxsc_list); | |
2513 | goto nla_put_failure; | |
2514 | } | |
2515 | nla_nest_end(skb, attr); | |
2516 | ||
2517 | rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST); | |
2518 | if (!rxsa_list) { | |
2519 | nla_nest_cancel(skb, rxsc_nest); | |
2520 | nla_nest_cancel(skb, rxsc_list); | |
2521 | goto nla_put_failure; | |
2522 | } | |
2523 | ||
2524 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { | |
2525 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); | |
2526 | struct nlattr *rxsa_nest; | |
2527 | ||
2528 | if (!rx_sa) | |
2529 | continue; | |
2530 | ||
2531 | rxsa_nest = nla_nest_start(skb, k++); | |
2532 | if (!rxsa_nest) { | |
2533 | nla_nest_cancel(skb, rxsa_list); | |
2534 | nla_nest_cancel(skb, rxsc_nest); | |
2535 | nla_nest_cancel(skb, rxsc_list); | |
2536 | goto nla_put_failure; | |
2537 | } | |
2538 | ||
2539 | attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS); | |
2540 | if (!attr) { | |
2541 | nla_nest_cancel(skb, rxsa_list); | |
2542 | nla_nest_cancel(skb, rxsc_nest); | |
2543 | nla_nest_cancel(skb, rxsc_list); | |
2544 | goto nla_put_failure; | |
2545 | } | |
2546 | if (copy_rx_sa_stats(skb, rx_sa->stats)) { | |
2547 | nla_nest_cancel(skb, attr); | |
2548 | nla_nest_cancel(skb, rxsa_list); | |
2549 | nla_nest_cancel(skb, rxsc_nest); | |
2550 | nla_nest_cancel(skb, rxsc_list); | |
2551 | goto nla_put_failure; | |
2552 | } | |
2553 | nla_nest_end(skb, attr); | |
2554 | ||
2555 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || | |
2556 | nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) || | |
8acca6ac | 2557 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
c09440f7 SD |
2558 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
2559 | nla_nest_cancel(skb, rxsa_nest); | |
2560 | nla_nest_cancel(skb, rxsc_nest); | |
2561 | nla_nest_cancel(skb, rxsc_list); | |
2562 | goto nla_put_failure; | |
2563 | } | |
2564 | nla_nest_end(skb, rxsa_nest); | |
2565 | } | |
2566 | ||
2567 | nla_nest_end(skb, rxsa_list); | |
2568 | nla_nest_end(skb, rxsc_nest); | |
2569 | } | |
2570 | ||
2571 | nla_nest_end(skb, rxsc_list); | |
2572 | ||
c09440f7 SD |
2573 | genlmsg_end(skb, hdr); |
2574 | ||
2575 | return 0; | |
2576 | ||
2577 | nla_put_failure: | |
c09440f7 SD |
2578 | genlmsg_cancel(skb, hdr); |
2579 | return -EMSGSIZE; | |
2580 | } | |
2581 | ||
96cfc505 SD |
2582 | static int macsec_generation = 1; /* protected by RTNL */ |
2583 | ||
c09440f7 SD |
2584 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
2585 | { | |
2586 | struct net *net = sock_net(skb->sk); | |
2587 | struct net_device *dev; | |
2588 | int dev_idx, d; | |
2589 | ||
2590 | dev_idx = cb->args[0]; | |
2591 | ||
2592 | d = 0; | |
c10c63ea | 2593 | rtnl_lock(); |
96cfc505 SD |
2594 | |
2595 | cb->seq = macsec_generation; | |
2596 | ||
c09440f7 SD |
2597 | for_each_netdev(net, dev) { |
2598 | struct macsec_secy *secy; | |
2599 | ||
2600 | if (d < dev_idx) | |
2601 | goto next; | |
2602 | ||
2603 | if (!netif_is_macsec(dev)) | |
2604 | goto next; | |
2605 | ||
2606 | secy = &macsec_priv(dev)->secy; | |
2607 | if (dump_secy(secy, dev, skb, cb) < 0) | |
2608 | goto done; | |
2609 | next: | |
2610 | d++; | |
2611 | } | |
2612 | ||
2613 | done: | |
c10c63ea | 2614 | rtnl_unlock(); |
c09440f7 SD |
2615 | cb->args[0] = d; |
2616 | return skb->len; | |
2617 | } | |
2618 | ||
2619 | static const struct genl_ops macsec_genl_ops[] = { | |
2620 | { | |
2621 | .cmd = MACSEC_CMD_GET_TXSC, | |
2622 | .dumpit = macsec_dump_txsc, | |
2623 | .policy = macsec_genl_policy, | |
2624 | }, | |
2625 | { | |
2626 | .cmd = MACSEC_CMD_ADD_RXSC, | |
2627 | .doit = macsec_add_rxsc, | |
2628 | .policy = macsec_genl_policy, | |
2629 | .flags = GENL_ADMIN_PERM, | |
2630 | }, | |
2631 | { | |
2632 | .cmd = MACSEC_CMD_DEL_RXSC, | |
2633 | .doit = macsec_del_rxsc, | |
2634 | .policy = macsec_genl_policy, | |
2635 | .flags = GENL_ADMIN_PERM, | |
2636 | }, | |
2637 | { | |
2638 | .cmd = MACSEC_CMD_UPD_RXSC, | |
2639 | .doit = macsec_upd_rxsc, | |
2640 | .policy = macsec_genl_policy, | |
2641 | .flags = GENL_ADMIN_PERM, | |
2642 | }, | |
2643 | { | |
2644 | .cmd = MACSEC_CMD_ADD_TXSA, | |
2645 | .doit = macsec_add_txsa, | |
2646 | .policy = macsec_genl_policy, | |
2647 | .flags = GENL_ADMIN_PERM, | |
2648 | }, | |
2649 | { | |
2650 | .cmd = MACSEC_CMD_DEL_TXSA, | |
2651 | .doit = macsec_del_txsa, | |
2652 | .policy = macsec_genl_policy, | |
2653 | .flags = GENL_ADMIN_PERM, | |
2654 | }, | |
2655 | { | |
2656 | .cmd = MACSEC_CMD_UPD_TXSA, | |
2657 | .doit = macsec_upd_txsa, | |
2658 | .policy = macsec_genl_policy, | |
2659 | .flags = GENL_ADMIN_PERM, | |
2660 | }, | |
2661 | { | |
2662 | .cmd = MACSEC_CMD_ADD_RXSA, | |
2663 | .doit = macsec_add_rxsa, | |
2664 | .policy = macsec_genl_policy, | |
2665 | .flags = GENL_ADMIN_PERM, | |
2666 | }, | |
2667 | { | |
2668 | .cmd = MACSEC_CMD_DEL_RXSA, | |
2669 | .doit = macsec_del_rxsa, | |
2670 | .policy = macsec_genl_policy, | |
2671 | .flags = GENL_ADMIN_PERM, | |
2672 | }, | |
2673 | { | |
2674 | .cmd = MACSEC_CMD_UPD_RXSA, | |
2675 | .doit = macsec_upd_rxsa, | |
2676 | .policy = macsec_genl_policy, | |
2677 | .flags = GENL_ADMIN_PERM, | |
2678 | }, | |
2679 | }; | |
2680 | ||
56989f6d | 2681 | static struct genl_family macsec_fam __ro_after_init = { |
489111e5 JB |
2682 | .name = MACSEC_GENL_NAME, |
2683 | .hdrsize = 0, | |
2684 | .version = MACSEC_GENL_VERSION, | |
2685 | .maxattr = MACSEC_ATTR_MAX, | |
2686 | .netnsok = true, | |
2687 | .module = THIS_MODULE, | |
2688 | .ops = macsec_genl_ops, | |
2689 | .n_ops = ARRAY_SIZE(macsec_genl_ops), | |
2690 | }; | |
2691 | ||
c09440f7 SD |
2692 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
2693 | struct net_device *dev) | |
2694 | { | |
2695 | struct macsec_dev *macsec = netdev_priv(dev); | |
2696 | struct macsec_secy *secy = &macsec->secy; | |
2697 | struct pcpu_secy_stats *secy_stats; | |
2698 | int ret, len; | |
2699 | ||
2700 | /* 10.5 */ | |
2701 | if (!secy->protect_frames) { | |
2702 | secy_stats = this_cpu_ptr(macsec->stats); | |
2703 | u64_stats_update_begin(&secy_stats->syncp); | |
2704 | secy_stats->stats.OutPktsUntagged++; | |
2705 | u64_stats_update_end(&secy_stats->syncp); | |
79c62220 | 2706 | skb->dev = macsec->real_dev; |
c09440f7 SD |
2707 | len = skb->len; |
2708 | ret = dev_queue_xmit(skb); | |
2709 | count_tx(dev, ret, len); | |
2710 | return ret; | |
2711 | } | |
2712 | ||
2713 | if (!secy->operational) { | |
2714 | kfree_skb(skb); | |
2715 | dev->stats.tx_dropped++; | |
2716 | return NETDEV_TX_OK; | |
2717 | } | |
2718 | ||
2719 | skb = macsec_encrypt(skb, dev); | |
2720 | if (IS_ERR(skb)) { | |
2721 | if (PTR_ERR(skb) != -EINPROGRESS) | |
2722 | dev->stats.tx_dropped++; | |
2723 | return NETDEV_TX_OK; | |
2724 | } | |
2725 | ||
2726 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
2727 | ||
2728 | macsec_encrypt_finish(skb, dev); | |
2729 | len = skb->len; | |
2730 | ret = dev_queue_xmit(skb); | |
2731 | count_tx(dev, ret, len); | |
2732 | return ret; | |
2733 | } | |
2734 | ||
2735 | #define MACSEC_FEATURES \ | |
2736 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) | |
e2003872 SD |
2737 | static struct lock_class_key macsec_netdev_addr_lock_key; |
2738 | ||
c09440f7 SD |
2739 | static int macsec_dev_init(struct net_device *dev) |
2740 | { | |
2741 | struct macsec_dev *macsec = macsec_priv(dev); | |
2742 | struct net_device *real_dev = macsec->real_dev; | |
5491e7c6 | 2743 | int err; |
c09440f7 SD |
2744 | |
2745 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
2746 | if (!dev->tstats) | |
2747 | return -ENOMEM; | |
2748 | ||
5491e7c6 PA |
2749 | err = gro_cells_init(&macsec->gro_cells, dev); |
2750 | if (err) { | |
2751 | free_percpu(dev->tstats); | |
2752 | return err; | |
2753 | } | |
2754 | ||
c09440f7 SD |
2755 | dev->features = real_dev->features & MACSEC_FEATURES; |
2756 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
2757 | ||
2758 | dev->needed_headroom = real_dev->needed_headroom + | |
2759 | MACSEC_NEEDED_HEADROOM; | |
2760 | dev->needed_tailroom = real_dev->needed_tailroom + | |
2761 | MACSEC_NEEDED_TAILROOM; | |
2762 | ||
2763 | if (is_zero_ether_addr(dev->dev_addr)) | |
2764 | eth_hw_addr_inherit(dev, real_dev); | |
2765 | if (is_zero_ether_addr(dev->broadcast)) | |
2766 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
2767 | ||
2768 | return 0; | |
2769 | } | |
2770 | ||
2771 | static void macsec_dev_uninit(struct net_device *dev) | |
2772 | { | |
5491e7c6 PA |
2773 | struct macsec_dev *macsec = macsec_priv(dev); |
2774 | ||
2775 | gro_cells_destroy(&macsec->gro_cells); | |
c09440f7 SD |
2776 | free_percpu(dev->tstats); |
2777 | } | |
2778 | ||
2779 | static netdev_features_t macsec_fix_features(struct net_device *dev, | |
2780 | netdev_features_t features) | |
2781 | { | |
2782 | struct macsec_dev *macsec = macsec_priv(dev); | |
2783 | struct net_device *real_dev = macsec->real_dev; | |
2784 | ||
5491e7c6 PA |
2785 | features &= (real_dev->features & MACSEC_FEATURES) | |
2786 | NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; | |
2787 | features |= NETIF_F_LLTX; | |
c09440f7 SD |
2788 | |
2789 | return features; | |
2790 | } | |
2791 | ||
2792 | static int macsec_dev_open(struct net_device *dev) | |
2793 | { | |
2794 | struct macsec_dev *macsec = macsec_priv(dev); | |
2795 | struct net_device *real_dev = macsec->real_dev; | |
2796 | int err; | |
2797 | ||
2798 | if (!(real_dev->flags & IFF_UP)) | |
2799 | return -ENETDOWN; | |
2800 | ||
2801 | err = dev_uc_add(real_dev, dev->dev_addr); | |
2802 | if (err < 0) | |
2803 | return err; | |
2804 | ||
2805 | if (dev->flags & IFF_ALLMULTI) { | |
2806 | err = dev_set_allmulti(real_dev, 1); | |
2807 | if (err < 0) | |
2808 | goto del_unicast; | |
2809 | } | |
2810 | ||
2811 | if (dev->flags & IFF_PROMISC) { | |
2812 | err = dev_set_promiscuity(real_dev, 1); | |
2813 | if (err < 0) | |
2814 | goto clear_allmulti; | |
2815 | } | |
2816 | ||
2817 | if (netif_carrier_ok(real_dev)) | |
2818 | netif_carrier_on(dev); | |
2819 | ||
2820 | return 0; | |
2821 | clear_allmulti: | |
2822 | if (dev->flags & IFF_ALLMULTI) | |
2823 | dev_set_allmulti(real_dev, -1); | |
2824 | del_unicast: | |
2825 | dev_uc_del(real_dev, dev->dev_addr); | |
2826 | netif_carrier_off(dev); | |
2827 | return err; | |
2828 | } | |
2829 | ||
2830 | static int macsec_dev_stop(struct net_device *dev) | |
2831 | { | |
2832 | struct macsec_dev *macsec = macsec_priv(dev); | |
2833 | struct net_device *real_dev = macsec->real_dev; | |
2834 | ||
2835 | netif_carrier_off(dev); | |
2836 | ||
2837 | dev_mc_unsync(real_dev, dev); | |
2838 | dev_uc_unsync(real_dev, dev); | |
2839 | ||
2840 | if (dev->flags & IFF_ALLMULTI) | |
2841 | dev_set_allmulti(real_dev, -1); | |
2842 | ||
2843 | if (dev->flags & IFF_PROMISC) | |
2844 | dev_set_promiscuity(real_dev, -1); | |
2845 | ||
2846 | dev_uc_del(real_dev, dev->dev_addr); | |
2847 | ||
2848 | return 0; | |
2849 | } | |
2850 | ||
2851 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) | |
2852 | { | |
2853 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
2854 | ||
2855 | if (!(dev->flags & IFF_UP)) | |
2856 | return; | |
2857 | ||
2858 | if (change & IFF_ALLMULTI) | |
2859 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
2860 | ||
2861 | if (change & IFF_PROMISC) | |
2862 | dev_set_promiscuity(real_dev, | |
2863 | dev->flags & IFF_PROMISC ? 1 : -1); | |
2864 | } | |
2865 | ||
2866 | static void macsec_dev_set_rx_mode(struct net_device *dev) | |
2867 | { | |
2868 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
2869 | ||
2870 | dev_mc_sync(real_dev, dev); | |
2871 | dev_uc_sync(real_dev, dev); | |
2872 | } | |
2873 | ||
2874 | static int macsec_set_mac_address(struct net_device *dev, void *p) | |
2875 | { | |
2876 | struct macsec_dev *macsec = macsec_priv(dev); | |
2877 | struct net_device *real_dev = macsec->real_dev; | |
2878 | struct sockaddr *addr = p; | |
2879 | int err; | |
2880 | ||
2881 | if (!is_valid_ether_addr(addr->sa_data)) | |
2882 | return -EADDRNOTAVAIL; | |
2883 | ||
2884 | if (!(dev->flags & IFF_UP)) | |
2885 | goto out; | |
2886 | ||
2887 | err = dev_uc_add(real_dev, addr->sa_data); | |
2888 | if (err < 0) | |
2889 | return err; | |
2890 | ||
2891 | dev_uc_del(real_dev, dev->dev_addr); | |
2892 | ||
2893 | out: | |
2894 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
2895 | return 0; | |
2896 | } | |
2897 | ||
2898 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) | |
2899 | { | |
2900 | struct macsec_dev *macsec = macsec_priv(dev); | |
2901 | unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); | |
2902 | ||
2903 | if (macsec->real_dev->mtu - extra < new_mtu) | |
2904 | return -ERANGE; | |
2905 | ||
2906 | dev->mtu = new_mtu; | |
2907 | ||
2908 | return 0; | |
2909 | } | |
2910 | ||
bc1f4470 | 2911 | static void macsec_get_stats64(struct net_device *dev, |
2912 | struct rtnl_link_stats64 *s) | |
c09440f7 SD |
2913 | { |
2914 | int cpu; | |
2915 | ||
2916 | if (!dev->tstats) | |
bc1f4470 | 2917 | return; |
c09440f7 SD |
2918 | |
2919 | for_each_possible_cpu(cpu) { | |
2920 | struct pcpu_sw_netstats *stats; | |
2921 | struct pcpu_sw_netstats tmp; | |
2922 | int start; | |
2923 | ||
2924 | stats = per_cpu_ptr(dev->tstats, cpu); | |
2925 | do { | |
2926 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2927 | tmp.rx_packets = stats->rx_packets; | |
2928 | tmp.rx_bytes = stats->rx_bytes; | |
2929 | tmp.tx_packets = stats->tx_packets; | |
2930 | tmp.tx_bytes = stats->tx_bytes; | |
2931 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2932 | ||
2933 | s->rx_packets += tmp.rx_packets; | |
2934 | s->rx_bytes += tmp.rx_bytes; | |
2935 | s->tx_packets += tmp.tx_packets; | |
2936 | s->tx_bytes += tmp.tx_bytes; | |
2937 | } | |
2938 | ||
2939 | s->rx_dropped = dev->stats.rx_dropped; | |
2940 | s->tx_dropped = dev->stats.tx_dropped; | |
c09440f7 SD |
2941 | } |
2942 | ||
2943 | static int macsec_get_iflink(const struct net_device *dev) | |
2944 | { | |
2945 | return macsec_priv(dev)->real_dev->ifindex; | |
2946 | } | |
2947 | ||
e2003872 SD |
2948 | |
2949 | static int macsec_get_nest_level(struct net_device *dev) | |
2950 | { | |
2951 | return macsec_priv(dev)->nest_level; | |
2952 | } | |
2953 | ||
2954 | ||
c09440f7 SD |
2955 | static const struct net_device_ops macsec_netdev_ops = { |
2956 | .ndo_init = macsec_dev_init, | |
2957 | .ndo_uninit = macsec_dev_uninit, | |
2958 | .ndo_open = macsec_dev_open, | |
2959 | .ndo_stop = macsec_dev_stop, | |
2960 | .ndo_fix_features = macsec_fix_features, | |
2961 | .ndo_change_mtu = macsec_change_mtu, | |
2962 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, | |
2963 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, | |
2964 | .ndo_set_mac_address = macsec_set_mac_address, | |
2965 | .ndo_start_xmit = macsec_start_xmit, | |
2966 | .ndo_get_stats64 = macsec_get_stats64, | |
2967 | .ndo_get_iflink = macsec_get_iflink, | |
e2003872 | 2968 | .ndo_get_lock_subclass = macsec_get_nest_level, |
c09440f7 SD |
2969 | }; |
2970 | ||
2971 | static const struct device_type macsec_type = { | |
2972 | .name = "macsec", | |
2973 | }; | |
2974 | ||
2975 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { | |
2976 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, | |
2977 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, | |
2978 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, | |
2979 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, | |
2980 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, | |
2981 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, | |
2982 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, | |
2983 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, | |
2984 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, | |
2985 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, | |
2986 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, | |
2987 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, | |
2988 | }; | |
2989 | ||
2990 | static void macsec_free_netdev(struct net_device *dev) | |
2991 | { | |
2992 | struct macsec_dev *macsec = macsec_priv(dev); | |
2993 | struct net_device *real_dev = macsec->real_dev; | |
2994 | ||
2995 | free_percpu(macsec->stats); | |
2996 | free_percpu(macsec->secy.tx_sc.stats); | |
2997 | ||
2998 | dev_put(real_dev); | |
2999 | free_netdev(dev); | |
3000 | } | |
3001 | ||
3002 | static void macsec_setup(struct net_device *dev) | |
3003 | { | |
3004 | ether_setup(dev); | |
91572088 JW |
3005 | dev->min_mtu = 0; |
3006 | dev->max_mtu = ETH_MAX_MTU; | |
e425974f | 3007 | dev->priv_flags |= IFF_NO_QUEUE; |
c09440f7 SD |
3008 | dev->netdev_ops = &macsec_netdev_ops; |
3009 | dev->destructor = macsec_free_netdev; | |
c24acf03 | 3010 | SET_NETDEV_DEVTYPE(dev, &macsec_type); |
c09440f7 SD |
3011 | |
3012 | eth_zero_addr(dev->broadcast); | |
3013 | } | |
3014 | ||
3015 | static void macsec_changelink_common(struct net_device *dev, | |
3016 | struct nlattr *data[]) | |
3017 | { | |
3018 | struct macsec_secy *secy; | |
3019 | struct macsec_tx_sc *tx_sc; | |
3020 | ||
3021 | secy = &macsec_priv(dev)->secy; | |
3022 | tx_sc = &secy->tx_sc; | |
3023 | ||
3024 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3025 | struct macsec_tx_sa *tx_sa; | |
3026 | ||
3027 | tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); | |
3028 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); | |
3029 | ||
3030 | secy->operational = tx_sa && tx_sa->active; | |
3031 | } | |
3032 | ||
3033 | if (data[IFLA_MACSEC_WINDOW]) | |
3034 | secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); | |
3035 | ||
3036 | if (data[IFLA_MACSEC_ENCRYPT]) | |
3037 | tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); | |
3038 | ||
3039 | if (data[IFLA_MACSEC_PROTECT]) | |
3040 | secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); | |
3041 | ||
3042 | if (data[IFLA_MACSEC_INC_SCI]) | |
3043 | tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
3044 | ||
3045 | if (data[IFLA_MACSEC_ES]) | |
3046 | tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); | |
3047 | ||
3048 | if (data[IFLA_MACSEC_SCB]) | |
3049 | tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); | |
3050 | ||
3051 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) | |
3052 | secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); | |
3053 | ||
3054 | if (data[IFLA_MACSEC_VALIDATION]) | |
3055 | secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); | |
3056 | } | |
3057 | ||
3058 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], | |
3059 | struct nlattr *data[]) | |
3060 | { | |
3061 | if (!data) | |
3062 | return 0; | |
3063 | ||
3064 | if (data[IFLA_MACSEC_CIPHER_SUITE] || | |
3065 | data[IFLA_MACSEC_ICV_LEN] || | |
3066 | data[IFLA_MACSEC_SCI] || | |
3067 | data[IFLA_MACSEC_PORT]) | |
3068 | return -EINVAL; | |
3069 | ||
3070 | macsec_changelink_common(dev, data); | |
3071 | ||
3072 | return 0; | |
3073 | } | |
3074 | ||
3075 | static void macsec_del_dev(struct macsec_dev *macsec) | |
3076 | { | |
3077 | int i; | |
3078 | ||
3079 | while (macsec->secy.rx_sc) { | |
3080 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); | |
3081 | ||
3082 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); | |
3083 | free_rx_sc(rx_sc); | |
3084 | } | |
3085 | ||
3086 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
3087 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); | |
3088 | ||
3089 | if (sa) { | |
3090 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); | |
3091 | clear_tx_sa(sa); | |
3092 | } | |
3093 | } | |
3094 | } | |
3095 | ||
bbe11fab SD |
3096 | static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
3097 | { | |
3098 | struct macsec_dev *macsec = macsec_priv(dev); | |
e2003872 | 3099 | struct net_device *real_dev = macsec->real_dev; |
bbe11fab SD |
3100 | |
3101 | unregister_netdevice_queue(dev, head); | |
3102 | list_del_rcu(&macsec->secys); | |
3103 | macsec_del_dev(macsec); | |
e2003872 | 3104 | netdev_upper_dev_unlink(real_dev, dev); |
bbe11fab SD |
3105 | |
3106 | macsec_generation++; | |
3107 | } | |
3108 | ||
c09440f7 SD |
3109 | static void macsec_dellink(struct net_device *dev, struct list_head *head) |
3110 | { | |
3111 | struct macsec_dev *macsec = macsec_priv(dev); | |
3112 | struct net_device *real_dev = macsec->real_dev; | |
3113 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3114 | ||
bbe11fab | 3115 | macsec_common_dellink(dev, head); |
96cfc505 | 3116 | |
960d5848 | 3117 | if (list_empty(&rxd->secys)) { |
c09440f7 | 3118 | netdev_rx_handler_unregister(real_dev); |
960d5848 SD |
3119 | kfree(rxd); |
3120 | } | |
c09440f7 SD |
3121 | } |
3122 | ||
3123 | static int register_macsec_dev(struct net_device *real_dev, | |
3124 | struct net_device *dev) | |
3125 | { | |
3126 | struct macsec_dev *macsec = macsec_priv(dev); | |
3127 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3128 | ||
3129 | if (!rxd) { | |
3130 | int err; | |
3131 | ||
3132 | rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); | |
3133 | if (!rxd) | |
3134 | return -ENOMEM; | |
3135 | ||
3136 | INIT_LIST_HEAD(&rxd->secys); | |
3137 | ||
3138 | err = netdev_rx_handler_register(real_dev, macsec_handle_frame, | |
3139 | rxd); | |
960d5848 SD |
3140 | if (err < 0) { |
3141 | kfree(rxd); | |
c09440f7 | 3142 | return err; |
960d5848 | 3143 | } |
c09440f7 SD |
3144 | } |
3145 | ||
3146 | list_add_tail_rcu(&macsec->secys, &rxd->secys); | |
3147 | return 0; | |
3148 | } | |
3149 | ||
3150 | static bool sci_exists(struct net_device *dev, sci_t sci) | |
3151 | { | |
3152 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); | |
3153 | struct macsec_dev *macsec; | |
3154 | ||
3155 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
3156 | if (macsec->secy.sci == sci) | |
3157 | return true; | |
3158 | } | |
3159 | ||
3160 | return false; | |
3161 | } | |
3162 | ||
3163 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) | |
3164 | { | |
3165 | return make_sci(dev->dev_addr, port); | |
3166 | } | |
3167 | ||
3168 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) | |
3169 | { | |
3170 | struct macsec_dev *macsec = macsec_priv(dev); | |
3171 | struct macsec_secy *secy = &macsec->secy; | |
3172 | ||
3173 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); | |
3174 | if (!macsec->stats) | |
3175 | return -ENOMEM; | |
3176 | ||
3177 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); | |
3178 | if (!secy->tx_sc.stats) { | |
3179 | free_percpu(macsec->stats); | |
3180 | return -ENOMEM; | |
3181 | } | |
3182 | ||
3183 | if (sci == MACSEC_UNDEF_SCI) | |
3184 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3185 | ||
3186 | secy->netdev = dev; | |
3187 | secy->operational = true; | |
3188 | secy->key_len = DEFAULT_SAK_LEN; | |
3189 | secy->icv_len = icv_len; | |
3190 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; | |
3191 | secy->protect_frames = true; | |
3192 | secy->replay_protect = false; | |
3193 | ||
3194 | secy->sci = sci; | |
3195 | secy->tx_sc.active = true; | |
3196 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; | |
3197 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; | |
3198 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; | |
3199 | secy->tx_sc.end_station = false; | |
3200 | secy->tx_sc.scb = false; | |
3201 | ||
3202 | return 0; | |
3203 | } | |
3204 | ||
3205 | static int macsec_newlink(struct net *net, struct net_device *dev, | |
3206 | struct nlattr *tb[], struct nlattr *data[]) | |
3207 | { | |
3208 | struct macsec_dev *macsec = macsec_priv(dev); | |
3209 | struct net_device *real_dev; | |
3210 | int err; | |
3211 | sci_t sci; | |
3212 | u8 icv_len = DEFAULT_ICV_LEN; | |
3213 | rx_handler_func_t *rx_handler; | |
3214 | ||
3215 | if (!tb[IFLA_LINK]) | |
3216 | return -EINVAL; | |
3217 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
3218 | if (!real_dev) | |
3219 | return -ENODEV; | |
3220 | ||
3221 | dev->priv_flags |= IFF_MACSEC; | |
3222 | ||
3223 | macsec->real_dev = real_dev; | |
3224 | ||
3225 | if (data && data[IFLA_MACSEC_ICV_LEN]) | |
3226 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
3227 | dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true); | |
3228 | ||
3229 | rx_handler = rtnl_dereference(real_dev->rx_handler); | |
3230 | if (rx_handler && rx_handler != macsec_handle_frame) | |
3231 | return -EBUSY; | |
3232 | ||
3233 | err = register_netdevice(dev); | |
3234 | if (err < 0) | |
3235 | return err; | |
3236 | ||
0759e552 SD |
3237 | dev_hold(real_dev); |
3238 | ||
952fcfd0 | 3239 | macsec->nest_level = dev_get_nest_level(real_dev) + 1; |
e2003872 SD |
3240 | netdev_lockdep_set_classes(dev); |
3241 | lockdep_set_class_and_subclass(&dev->addr_list_lock, | |
3242 | &macsec_netdev_addr_lock_key, | |
3243 | macsec_get_nest_level(dev)); | |
3244 | ||
3245 | err = netdev_upper_dev_link(real_dev, dev); | |
3246 | if (err < 0) | |
3247 | goto unregister; | |
3248 | ||
c09440f7 SD |
3249 | /* need to be already registered so that ->init has run and |
3250 | * the MAC addr is set | |
3251 | */ | |
3252 | if (data && data[IFLA_MACSEC_SCI]) | |
3253 | sci = nla_get_sci(data[IFLA_MACSEC_SCI]); | |
3254 | else if (data && data[IFLA_MACSEC_PORT]) | |
3255 | sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); | |
3256 | else | |
3257 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3258 | ||
3259 | if (rx_handler && sci_exists(real_dev, sci)) { | |
3260 | err = -EBUSY; | |
e2003872 | 3261 | goto unlink; |
c09440f7 SD |
3262 | } |
3263 | ||
3264 | err = macsec_add_dev(dev, sci, icv_len); | |
3265 | if (err) | |
e2003872 | 3266 | goto unlink; |
c09440f7 SD |
3267 | |
3268 | if (data) | |
3269 | macsec_changelink_common(dev, data); | |
3270 | ||
3271 | err = register_macsec_dev(real_dev, dev); | |
3272 | if (err < 0) | |
3273 | goto del_dev; | |
3274 | ||
96cfc505 SD |
3275 | macsec_generation++; |
3276 | ||
c09440f7 SD |
3277 | return 0; |
3278 | ||
3279 | del_dev: | |
3280 | macsec_del_dev(macsec); | |
e2003872 SD |
3281 | unlink: |
3282 | netdev_upper_dev_unlink(real_dev, dev); | |
c09440f7 SD |
3283 | unregister: |
3284 | unregister_netdevice(dev); | |
3285 | return err; | |
3286 | } | |
3287 | ||
3288 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[]) | |
3289 | { | |
74816480 | 3290 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
c09440f7 SD |
3291 | u8 icv_len = DEFAULT_ICV_LEN; |
3292 | int flag; | |
3293 | bool es, scb, sci; | |
3294 | ||
3295 | if (!data) | |
3296 | return 0; | |
3297 | ||
3298 | if (data[IFLA_MACSEC_CIPHER_SUITE]) | |
3299 | csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); | |
3300 | ||
f04c392d | 3301 | if (data[IFLA_MACSEC_ICV_LEN]) { |
c09440f7 | 3302 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
f04c392d DC |
3303 | if (icv_len != DEFAULT_ICV_LEN) { |
3304 | char dummy_key[DEFAULT_SAK_LEN] = { 0 }; | |
3305 | struct crypto_aead *dummy_tfm; | |
3306 | ||
3307 | dummy_tfm = macsec_alloc_tfm(dummy_key, | |
3308 | DEFAULT_SAK_LEN, | |
3309 | icv_len); | |
3310 | if (IS_ERR(dummy_tfm)) | |
3311 | return PTR_ERR(dummy_tfm); | |
3312 | crypto_free_aead(dummy_tfm); | |
3313 | } | |
3314 | } | |
c09440f7 SD |
3315 | |
3316 | switch (csid) { | |
74816480 SD |
3317 | case MACSEC_DEFAULT_CIPHER_ID: |
3318 | case MACSEC_DEFAULT_CIPHER_ALT: | |
c09440f7 | 3319 | if (icv_len < MACSEC_MIN_ICV_LEN || |
2ccbe2cb | 3320 | icv_len > MACSEC_STD_ICV_LEN) |
c09440f7 SD |
3321 | return -EINVAL; |
3322 | break; | |
3323 | default: | |
3324 | return -EINVAL; | |
3325 | } | |
3326 | ||
3327 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3328 | if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) | |
3329 | return -EINVAL; | |
3330 | } | |
3331 | ||
3332 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; | |
3333 | flag < IFLA_MACSEC_VALIDATION; | |
3334 | flag++) { | |
3335 | if (data[flag]) { | |
3336 | if (nla_get_u8(data[flag]) > 1) | |
3337 | return -EINVAL; | |
3338 | } | |
3339 | } | |
3340 | ||
3341 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; | |
3342 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; | |
3343 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; | |
3344 | ||
3345 | if ((sci && (scb || es)) || (scb && es)) | |
3346 | return -EINVAL; | |
3347 | ||
3348 | if (data[IFLA_MACSEC_VALIDATION] && | |
3349 | nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) | |
3350 | return -EINVAL; | |
3351 | ||
4b1fb935 SD |
3352 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
3353 | nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && | |
c09440f7 SD |
3354 | !data[IFLA_MACSEC_WINDOW]) |
3355 | return -EINVAL; | |
3356 | ||
3357 | return 0; | |
3358 | } | |
3359 | ||
3360 | static struct net *macsec_get_link_net(const struct net_device *dev) | |
3361 | { | |
3362 | return dev_net(macsec_priv(dev)->real_dev); | |
3363 | } | |
3364 | ||
3365 | static size_t macsec_get_size(const struct net_device *dev) | |
3366 | { | |
c9fba3ed ZS |
3367 | return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */ |
3368 | nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */ | |
3369 | nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */ | |
3370 | nla_total_size(4) + /* IFLA_MACSEC_WINDOW */ | |
3371 | nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */ | |
3372 | nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */ | |
3373 | nla_total_size(1) + /* IFLA_MACSEC_PROTECT */ | |
3374 | nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */ | |
3375 | nla_total_size(1) + /* IFLA_MACSEC_ES */ | |
3376 | nla_total_size(1) + /* IFLA_MACSEC_SCB */ | |
3377 | nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */ | |
3378 | nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */ | |
c09440f7 SD |
3379 | 0; |
3380 | } | |
3381 | ||
3382 | static int macsec_fill_info(struct sk_buff *skb, | |
3383 | const struct net_device *dev) | |
3384 | { | |
3385 | struct macsec_secy *secy = &macsec_priv(dev)->secy; | |
3386 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
3387 | ||
f60d94c0 ND |
3388 | if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
3389 | IFLA_MACSEC_PAD) || | |
c09440f7 | 3390 | nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
f60d94c0 | 3391 | nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
c0cc5316 | 3392 | MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) || |
c09440f7 SD |
3393 | nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
3394 | nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || | |
3395 | nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || | |
3396 | nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || | |
3397 | nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || | |
3398 | nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || | |
3399 | nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || | |
3400 | nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || | |
3401 | 0) | |
3402 | goto nla_put_failure; | |
3403 | ||
3404 | if (secy->replay_protect) { | |
3405 | if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) | |
3406 | goto nla_put_failure; | |
3407 | } | |
3408 | ||
3409 | return 0; | |
3410 | ||
3411 | nla_put_failure: | |
3412 | return -EMSGSIZE; | |
3413 | } | |
3414 | ||
3415 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { | |
3416 | .kind = "macsec", | |
3417 | .priv_size = sizeof(struct macsec_dev), | |
3418 | .maxtype = IFLA_MACSEC_MAX, | |
3419 | .policy = macsec_rtnl_policy, | |
3420 | .setup = macsec_setup, | |
3421 | .validate = macsec_validate_attr, | |
3422 | .newlink = macsec_newlink, | |
3423 | .changelink = macsec_changelink, | |
3424 | .dellink = macsec_dellink, | |
3425 | .get_size = macsec_get_size, | |
3426 | .fill_info = macsec_fill_info, | |
3427 | .get_link_net = macsec_get_link_net, | |
3428 | }; | |
3429 | ||
3430 | static bool is_macsec_master(struct net_device *dev) | |
3431 | { | |
3432 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; | |
3433 | } | |
3434 | ||
3435 | static int macsec_notify(struct notifier_block *this, unsigned long event, | |
3436 | void *ptr) | |
3437 | { | |
3438 | struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); | |
3439 | LIST_HEAD(head); | |
3440 | ||
3441 | if (!is_macsec_master(real_dev)) | |
3442 | return NOTIFY_DONE; | |
3443 | ||
3444 | switch (event) { | |
3445 | case NETDEV_UNREGISTER: { | |
3446 | struct macsec_dev *m, *n; | |
3447 | struct macsec_rxh_data *rxd; | |
3448 | ||
3449 | rxd = macsec_data_rtnl(real_dev); | |
3450 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
bbe11fab | 3451 | macsec_common_dellink(m->secy.netdev, &head); |
c09440f7 | 3452 | } |
bbe11fab SD |
3453 | |
3454 | netdev_rx_handler_unregister(real_dev); | |
3455 | kfree(rxd); | |
3456 | ||
c09440f7 SD |
3457 | unregister_netdevice_many(&head); |
3458 | break; | |
3459 | } | |
3460 | case NETDEV_CHANGEMTU: { | |
3461 | struct macsec_dev *m; | |
3462 | struct macsec_rxh_data *rxd; | |
3463 | ||
3464 | rxd = macsec_data_rtnl(real_dev); | |
3465 | list_for_each_entry(m, &rxd->secys, secys) { | |
3466 | struct net_device *dev = m->secy.netdev; | |
3467 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + | |
3468 | macsec_extra_len(true)); | |
3469 | ||
3470 | if (dev->mtu > mtu) | |
3471 | dev_set_mtu(dev, mtu); | |
3472 | } | |
3473 | } | |
3474 | } | |
3475 | ||
3476 | return NOTIFY_OK; | |
3477 | } | |
3478 | ||
3479 | static struct notifier_block macsec_notifier = { | |
3480 | .notifier_call = macsec_notify, | |
3481 | }; | |
3482 | ||
3483 | static int __init macsec_init(void) | |
3484 | { | |
3485 | int err; | |
3486 | ||
3487 | pr_info("MACsec IEEE 802.1AE\n"); | |
3488 | err = register_netdevice_notifier(&macsec_notifier); | |
3489 | if (err) | |
3490 | return err; | |
3491 | ||
3492 | err = rtnl_link_register(&macsec_link_ops); | |
3493 | if (err) | |
3494 | goto notifier; | |
3495 | ||
489111e5 | 3496 | err = genl_register_family(&macsec_fam); |
c09440f7 SD |
3497 | if (err) |
3498 | goto rtnl; | |
3499 | ||
3500 | return 0; | |
3501 | ||
3502 | rtnl: | |
3503 | rtnl_link_unregister(&macsec_link_ops); | |
3504 | notifier: | |
3505 | unregister_netdevice_notifier(&macsec_notifier); | |
3506 | return err; | |
3507 | } | |
3508 | ||
3509 | static void __exit macsec_exit(void) | |
3510 | { | |
3511 | genl_unregister_family(&macsec_fam); | |
3512 | rtnl_link_unregister(&macsec_link_ops); | |
3513 | unregister_netdevice_notifier(&macsec_notifier); | |
b196c22a | 3514 | rcu_barrier(); |
c09440f7 SD |
3515 | } |
3516 | ||
3517 | module_init(macsec_init); | |
3518 | module_exit(macsec_exit); | |
3519 | ||
3520 | MODULE_ALIAS_RTNL_LINK("macsec"); | |
3521 | ||
3522 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); | |
3523 | MODULE_LICENSE("GPL v2"); |