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