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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> | |
21 | ||
22 | #include <uapi/linux/if_macsec.h> | |
23 | ||
24 | typedef u64 __bitwise sci_t; | |
25 | ||
26 | #define MACSEC_SCI_LEN 8 | |
27 | ||
28 | /* SecTAG length = macsec_eth_header without the optional SCI */ | |
29 | #define MACSEC_TAG_LEN 6 | |
30 | ||
31 | struct macsec_eth_header { | |
32 | struct ethhdr eth; | |
33 | /* SecTAG */ | |
34 | u8 tci_an; | |
35 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
36 | u8 short_length:6, | |
37 | unused:2; | |
38 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
39 | u8 unused:2, | |
40 | short_length:6; | |
41 | #else | |
42 | #error "Please fix <asm/byteorder.h>" | |
43 | #endif | |
44 | __be32 packet_number; | |
45 | u8 secure_channel_id[8]; /* optional */ | |
46 | } __packed; | |
47 | ||
48 | #define MACSEC_TCI_VERSION 0x80 | |
49 | #define MACSEC_TCI_ES 0x40 /* end station */ | |
50 | #define MACSEC_TCI_SC 0x20 /* SCI present */ | |
51 | #define MACSEC_TCI_SCB 0x10 /* epon */ | |
52 | #define MACSEC_TCI_E 0x08 /* encryption */ | |
53 | #define MACSEC_TCI_C 0x04 /* changed text */ | |
54 | #define MACSEC_AN_MASK 0x03 /* association number */ | |
55 | #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C) | |
56 | ||
57 | /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */ | |
58 | #define MIN_NON_SHORT_LEN 48 | |
59 | ||
60 | #define GCM_AES_IV_LEN 12 | |
61 | #define DEFAULT_ICV_LEN 16 | |
62 | ||
63 | #define MACSEC_NUM_AN 4 /* 2 bits for the association number */ | |
64 | ||
65 | #define for_each_rxsc(secy, sc) \ | |
66 | for (sc = rcu_dereference_bh(secy->rx_sc); \ | |
67 | sc; \ | |
68 | sc = rcu_dereference_bh(sc->next)) | |
69 | #define for_each_rxsc_rtnl(secy, sc) \ | |
70 | for (sc = rtnl_dereference(secy->rx_sc); \ | |
71 | sc; \ | |
72 | sc = rtnl_dereference(sc->next)) | |
73 | ||
74 | struct gcm_iv { | |
75 | union { | |
76 | u8 secure_channel_id[8]; | |
77 | sci_t sci; | |
78 | }; | |
79 | __be32 pn; | |
80 | }; | |
81 | ||
82 | /** | |
83 | * struct macsec_key - SA key | |
84 | * @id: user-provided key identifier | |
85 | * @tfm: crypto struct, key storage | |
86 | */ | |
87 | struct macsec_key { | |
8acca6ac | 88 | u8 id[MACSEC_KEYID_LEN]; |
c09440f7 SD |
89 | struct crypto_aead *tfm; |
90 | }; | |
91 | ||
92 | struct macsec_rx_sc_stats { | |
93 | __u64 InOctetsValidated; | |
94 | __u64 InOctetsDecrypted; | |
95 | __u64 InPktsUnchecked; | |
96 | __u64 InPktsDelayed; | |
97 | __u64 InPktsOK; | |
98 | __u64 InPktsInvalid; | |
99 | __u64 InPktsLate; | |
100 | __u64 InPktsNotValid; | |
101 | __u64 InPktsNotUsingSA; | |
102 | __u64 InPktsUnusedSA; | |
103 | }; | |
104 | ||
105 | struct macsec_rx_sa_stats { | |
106 | __u32 InPktsOK; | |
107 | __u32 InPktsInvalid; | |
108 | __u32 InPktsNotValid; | |
109 | __u32 InPktsNotUsingSA; | |
110 | __u32 InPktsUnusedSA; | |
111 | }; | |
112 | ||
113 | struct macsec_tx_sa_stats { | |
114 | __u32 OutPktsProtected; | |
115 | __u32 OutPktsEncrypted; | |
116 | }; | |
117 | ||
118 | struct macsec_tx_sc_stats { | |
119 | __u64 OutPktsProtected; | |
120 | __u64 OutPktsEncrypted; | |
121 | __u64 OutOctetsProtected; | |
122 | __u64 OutOctetsEncrypted; | |
123 | }; | |
124 | ||
125 | struct macsec_dev_stats { | |
126 | __u64 OutPktsUntagged; | |
127 | __u64 InPktsUntagged; | |
128 | __u64 OutPktsTooLong; | |
129 | __u64 InPktsNoTag; | |
130 | __u64 InPktsBadTag; | |
131 | __u64 InPktsUnknownSCI; | |
132 | __u64 InPktsNoSCI; | |
133 | __u64 InPktsOverrun; | |
134 | }; | |
135 | ||
136 | /** | |
137 | * struct macsec_rx_sa - receive secure association | |
138 | * @active: | |
139 | * @next_pn: packet number expected for the next packet | |
140 | * @lock: protects next_pn manipulations | |
141 | * @key: key structure | |
142 | * @stats: per-SA stats | |
143 | */ | |
144 | struct macsec_rx_sa { | |
145 | struct macsec_key key; | |
146 | spinlock_t lock; | |
147 | u32 next_pn; | |
148 | atomic_t refcnt; | |
149 | bool active; | |
150 | struct macsec_rx_sa_stats __percpu *stats; | |
151 | struct macsec_rx_sc *sc; | |
152 | struct rcu_head rcu; | |
153 | }; | |
154 | ||
155 | struct pcpu_rx_sc_stats { | |
156 | struct macsec_rx_sc_stats stats; | |
157 | struct u64_stats_sync syncp; | |
158 | }; | |
159 | ||
160 | /** | |
161 | * struct macsec_rx_sc - receive secure channel | |
162 | * @sci: secure channel identifier for this SC | |
163 | * @active: channel is active | |
164 | * @sa: array of secure associations | |
165 | * @stats: per-SC stats | |
166 | */ | |
167 | struct macsec_rx_sc { | |
168 | struct macsec_rx_sc __rcu *next; | |
169 | sci_t sci; | |
170 | bool active; | |
171 | struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN]; | |
172 | struct pcpu_rx_sc_stats __percpu *stats; | |
173 | atomic_t refcnt; | |
174 | struct rcu_head rcu_head; | |
175 | }; | |
176 | ||
177 | /** | |
178 | * struct macsec_tx_sa - transmit secure association | |
179 | * @active: | |
180 | * @next_pn: packet number to use for the next packet | |
181 | * @lock: protects next_pn manipulations | |
182 | * @key: key structure | |
183 | * @stats: per-SA stats | |
184 | */ | |
185 | struct macsec_tx_sa { | |
186 | struct macsec_key key; | |
187 | spinlock_t lock; | |
188 | u32 next_pn; | |
189 | atomic_t refcnt; | |
190 | bool active; | |
191 | struct macsec_tx_sa_stats __percpu *stats; | |
192 | struct rcu_head rcu; | |
193 | }; | |
194 | ||
195 | struct pcpu_tx_sc_stats { | |
196 | struct macsec_tx_sc_stats stats; | |
197 | struct u64_stats_sync syncp; | |
198 | }; | |
199 | ||
200 | /** | |
201 | * struct macsec_tx_sc - transmit secure channel | |
202 | * @active: | |
203 | * @encoding_sa: association number of the SA currently in use | |
204 | * @encrypt: encrypt packets on transmit, or authenticate only | |
205 | * @send_sci: always include the SCI in the SecTAG | |
206 | * @end_station: | |
207 | * @scb: single copy broadcast flag | |
208 | * @sa: array of secure associations | |
209 | * @stats: stats for this TXSC | |
210 | */ | |
211 | struct macsec_tx_sc { | |
212 | bool active; | |
213 | u8 encoding_sa; | |
214 | bool encrypt; | |
215 | bool send_sci; | |
216 | bool end_station; | |
217 | bool scb; | |
218 | struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN]; | |
219 | struct pcpu_tx_sc_stats __percpu *stats; | |
220 | }; | |
221 | ||
222 | #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT | |
223 | ||
224 | /** | |
225 | * struct macsec_secy - MACsec Security Entity | |
226 | * @netdev: netdevice for this SecY | |
227 | * @n_rx_sc: number of receive secure channels configured on this SecY | |
228 | * @sci: secure channel identifier used for tx | |
229 | * @key_len: length of keys used by the cipher suite | |
230 | * @icv_len: length of ICV used by the cipher suite | |
231 | * @validate_frames: validation mode | |
232 | * @operational: MAC_Operational flag | |
233 | * @protect_frames: enable protection for this SecY | |
234 | * @replay_protect: enable packet number checks on receive | |
235 | * @replay_window: size of the replay window | |
236 | * @tx_sc: transmit secure channel | |
237 | * @rx_sc: linked list of receive secure channels | |
238 | */ | |
239 | struct macsec_secy { | |
240 | struct net_device *netdev; | |
241 | unsigned int n_rx_sc; | |
242 | sci_t sci; | |
243 | u16 key_len; | |
244 | u16 icv_len; | |
245 | enum macsec_validation_type validate_frames; | |
246 | bool operational; | |
247 | bool protect_frames; | |
248 | bool replay_protect; | |
249 | u32 replay_window; | |
250 | struct macsec_tx_sc tx_sc; | |
251 | struct macsec_rx_sc __rcu *rx_sc; | |
252 | }; | |
253 | ||
254 | struct pcpu_secy_stats { | |
255 | struct macsec_dev_stats stats; | |
256 | struct u64_stats_sync syncp; | |
257 | }; | |
258 | ||
259 | /** | |
260 | * struct macsec_dev - private data | |
261 | * @secy: SecY config | |
262 | * @real_dev: pointer to underlying netdevice | |
263 | * @stats: MACsec device stats | |
264 | * @secys: linked list of SecY's on the underlying device | |
265 | */ | |
266 | struct macsec_dev { | |
267 | struct macsec_secy secy; | |
268 | struct net_device *real_dev; | |
269 | struct pcpu_secy_stats __percpu *stats; | |
270 | struct list_head secys; | |
271 | }; | |
272 | ||
273 | /** | |
274 | * struct macsec_rxh_data - rx_handler private argument | |
275 | * @secys: linked list of SecY's on this underlying device | |
276 | */ | |
277 | struct macsec_rxh_data { | |
278 | struct list_head secys; | |
279 | }; | |
280 | ||
281 | static struct macsec_dev *macsec_priv(const struct net_device *dev) | |
282 | { | |
283 | return (struct macsec_dev *)netdev_priv(dev); | |
284 | } | |
285 | ||
286 | static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) | |
287 | { | |
288 | return rcu_dereference_bh(dev->rx_handler_data); | |
289 | } | |
290 | ||
291 | static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) | |
292 | { | |
293 | return rtnl_dereference(dev->rx_handler_data); | |
294 | } | |
295 | ||
296 | struct macsec_cb { | |
297 | struct aead_request *req; | |
298 | union { | |
299 | struct macsec_tx_sa *tx_sa; | |
300 | struct macsec_rx_sa *rx_sa; | |
301 | }; | |
302 | u8 assoc_num; | |
303 | bool valid; | |
304 | bool has_sci; | |
305 | }; | |
306 | ||
307 | static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) | |
308 | { | |
309 | struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); | |
310 | ||
311 | if (!sa || !sa->active) | |
312 | return NULL; | |
313 | ||
314 | if (!atomic_inc_not_zero(&sa->refcnt)) | |
315 | return NULL; | |
316 | ||
317 | return sa; | |
318 | } | |
319 | ||
320 | static void free_rx_sc_rcu(struct rcu_head *head) | |
321 | { | |
322 | struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); | |
323 | ||
324 | free_percpu(rx_sc->stats); | |
325 | kfree(rx_sc); | |
326 | } | |
327 | ||
328 | static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) | |
329 | { | |
330 | return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL; | |
331 | } | |
332 | ||
333 | static void macsec_rxsc_put(struct macsec_rx_sc *sc) | |
334 | { | |
335 | if (atomic_dec_and_test(&sc->refcnt)) | |
336 | call_rcu(&sc->rcu_head, free_rx_sc_rcu); | |
337 | } | |
338 | ||
339 | static void free_rxsa(struct rcu_head *head) | |
340 | { | |
341 | struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); | |
342 | ||
343 | crypto_free_aead(sa->key.tfm); | |
344 | free_percpu(sa->stats); | |
345 | macsec_rxsc_put(sa->sc); | |
346 | kfree(sa); | |
347 | } | |
348 | ||
349 | static void macsec_rxsa_put(struct macsec_rx_sa *sa) | |
350 | { | |
351 | if (atomic_dec_and_test(&sa->refcnt)) | |
352 | call_rcu(&sa->rcu, free_rxsa); | |
353 | } | |
354 | ||
355 | static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) | |
356 | { | |
357 | struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); | |
358 | ||
359 | if (!sa || !sa->active) | |
360 | return NULL; | |
361 | ||
362 | if (!atomic_inc_not_zero(&sa->refcnt)) | |
363 | return NULL; | |
364 | ||
365 | return sa; | |
366 | } | |
367 | ||
368 | static void free_txsa(struct rcu_head *head) | |
369 | { | |
370 | struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); | |
371 | ||
372 | crypto_free_aead(sa->key.tfm); | |
373 | free_percpu(sa->stats); | |
374 | kfree(sa); | |
375 | } | |
376 | ||
377 | static void macsec_txsa_put(struct macsec_tx_sa *sa) | |
378 | { | |
379 | if (atomic_dec_and_test(&sa->refcnt)) | |
380 | call_rcu(&sa->rcu, free_txsa); | |
381 | } | |
382 | ||
383 | static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) | |
384 | { | |
385 | BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); | |
386 | return (struct macsec_cb *)skb->cb; | |
387 | } | |
388 | ||
389 | #define MACSEC_PORT_ES (htons(0x0001)) | |
390 | #define MACSEC_PORT_SCB (0x0000) | |
391 | #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) | |
392 | ||
393 | #define DEFAULT_SAK_LEN 16 | |
394 | #define DEFAULT_SEND_SCI true | |
395 | #define DEFAULT_ENCRYPT false | |
396 | #define DEFAULT_ENCODING_SA 0 | |
397 | ||
398 | static sci_t make_sci(u8 *addr, __be16 port) | |
399 | { | |
400 | sci_t sci; | |
401 | ||
402 | memcpy(&sci, addr, ETH_ALEN); | |
403 | memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port)); | |
404 | ||
405 | return sci; | |
406 | } | |
407 | ||
408 | static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present) | |
409 | { | |
410 | sci_t sci; | |
411 | ||
412 | if (sci_present) | |
413 | memcpy(&sci, hdr->secure_channel_id, | |
414 | sizeof(hdr->secure_channel_id)); | |
415 | else | |
416 | sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES); | |
417 | ||
418 | return sci; | |
419 | } | |
420 | ||
421 | static unsigned int macsec_sectag_len(bool sci_present) | |
422 | { | |
423 | return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0); | |
424 | } | |
425 | ||
426 | static unsigned int macsec_hdr_len(bool sci_present) | |
427 | { | |
428 | return macsec_sectag_len(sci_present) + ETH_HLEN; | |
429 | } | |
430 | ||
431 | static unsigned int macsec_extra_len(bool sci_present) | |
432 | { | |
433 | return macsec_sectag_len(sci_present) + sizeof(__be16); | |
434 | } | |
435 | ||
436 | /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */ | |
437 | static void macsec_fill_sectag(struct macsec_eth_header *h, | |
438 | const struct macsec_secy *secy, u32 pn) | |
439 | { | |
440 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
441 | ||
442 | memset(&h->tci_an, 0, macsec_sectag_len(tx_sc->send_sci)); | |
443 | h->eth.h_proto = htons(ETH_P_MACSEC); | |
444 | ||
445 | if (tx_sc->send_sci || | |
446 | (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb)) { | |
447 | h->tci_an |= MACSEC_TCI_SC; | |
448 | memcpy(&h->secure_channel_id, &secy->sci, | |
449 | sizeof(h->secure_channel_id)); | |
450 | } else { | |
451 | if (tx_sc->end_station) | |
452 | h->tci_an |= MACSEC_TCI_ES; | |
453 | if (tx_sc->scb) | |
454 | h->tci_an |= MACSEC_TCI_SCB; | |
455 | } | |
456 | ||
457 | h->packet_number = htonl(pn); | |
458 | ||
459 | /* with GCM, C/E clear for !encrypt, both set for encrypt */ | |
460 | if (tx_sc->encrypt) | |
461 | h->tci_an |= MACSEC_TCI_CONFID; | |
462 | else if (secy->icv_len != DEFAULT_ICV_LEN) | |
463 | h->tci_an |= MACSEC_TCI_C; | |
464 | ||
465 | h->tci_an |= tx_sc->encoding_sa; | |
466 | } | |
467 | ||
468 | static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len) | |
469 | { | |
470 | if (data_len < MIN_NON_SHORT_LEN) | |
471 | h->short_length = data_len; | |
472 | } | |
473 | ||
474 | /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */ | |
475 | static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len) | |
476 | { | |
477 | struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data; | |
478 | int len = skb->len - 2 * ETH_ALEN; | |
479 | int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len; | |
480 | ||
481 | /* a) It comprises at least 17 octets */ | |
482 | if (skb->len <= 16) | |
483 | return false; | |
484 | ||
485 | /* b) MACsec EtherType: already checked */ | |
486 | ||
487 | /* c) V bit is clear */ | |
488 | if (h->tci_an & MACSEC_TCI_VERSION) | |
489 | return false; | |
490 | ||
491 | /* d) ES or SCB => !SC */ | |
492 | if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) && | |
493 | (h->tci_an & MACSEC_TCI_SC)) | |
494 | return false; | |
495 | ||
496 | /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */ | |
497 | if (h->unused) | |
498 | return false; | |
499 | ||
500 | /* rx.pn != 0 (figure 10-5) */ | |
501 | if (!h->packet_number) | |
502 | return false; | |
503 | ||
504 | /* length check, f) g) h) i) */ | |
505 | if (h->short_length) | |
506 | return len == extra_len + h->short_length; | |
507 | return len >= extra_len + MIN_NON_SHORT_LEN; | |
508 | } | |
509 | ||
510 | #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true)) | |
511 | #define MACSEC_NEEDED_TAILROOM MACSEC_MAX_ICV_LEN | |
512 | ||
513 | static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn) | |
514 | { | |
515 | struct gcm_iv *gcm_iv = (struct gcm_iv *)iv; | |
516 | ||
517 | gcm_iv->sci = sci; | |
518 | gcm_iv->pn = htonl(pn); | |
519 | } | |
520 | ||
521 | static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) | |
522 | { | |
523 | return (struct macsec_eth_header *)skb_mac_header(skb); | |
524 | } | |
525 | ||
526 | static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy) | |
527 | { | |
528 | u32 pn; | |
529 | ||
530 | spin_lock_bh(&tx_sa->lock); | |
531 | pn = tx_sa->next_pn; | |
532 | ||
533 | tx_sa->next_pn++; | |
534 | if (tx_sa->next_pn == 0) { | |
535 | pr_debug("PN wrapped, transitioning to !oper\n"); | |
536 | tx_sa->active = false; | |
537 | if (secy->protect_frames) | |
538 | secy->operational = false; | |
539 | } | |
540 | spin_unlock_bh(&tx_sa->lock); | |
541 | ||
542 | return pn; | |
543 | } | |
544 | ||
545 | static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) | |
546 | { | |
547 | struct macsec_dev *macsec = netdev_priv(dev); | |
548 | ||
549 | skb->dev = macsec->real_dev; | |
550 | skb_reset_mac_header(skb); | |
551 | skb->protocol = eth_hdr(skb)->h_proto; | |
552 | } | |
553 | ||
554 | static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, | |
555 | struct macsec_tx_sa *tx_sa) | |
556 | { | |
557 | struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); | |
558 | ||
559 | u64_stats_update_begin(&txsc_stats->syncp); | |
560 | if (tx_sc->encrypt) { | |
561 | txsc_stats->stats.OutOctetsEncrypted += skb->len; | |
562 | txsc_stats->stats.OutPktsEncrypted++; | |
563 | this_cpu_inc(tx_sa->stats->OutPktsEncrypted); | |
564 | } else { | |
565 | txsc_stats->stats.OutOctetsProtected += skb->len; | |
566 | txsc_stats->stats.OutPktsProtected++; | |
567 | this_cpu_inc(tx_sa->stats->OutPktsProtected); | |
568 | } | |
569 | u64_stats_update_end(&txsc_stats->syncp); | |
570 | } | |
571 | ||
572 | static void count_tx(struct net_device *dev, int ret, int len) | |
573 | { | |
574 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
575 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
576 | ||
577 | u64_stats_update_begin(&stats->syncp); | |
578 | stats->tx_packets++; | |
579 | stats->tx_bytes += len; | |
580 | u64_stats_update_end(&stats->syncp); | |
581 | } else { | |
582 | dev->stats.tx_dropped++; | |
583 | } | |
584 | } | |
585 | ||
586 | static void macsec_encrypt_done(struct crypto_async_request *base, int err) | |
587 | { | |
588 | struct sk_buff *skb = base->data; | |
589 | struct net_device *dev = skb->dev; | |
590 | struct macsec_dev *macsec = macsec_priv(dev); | |
591 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; | |
592 | int len, ret; | |
593 | ||
594 | aead_request_free(macsec_skb_cb(skb)->req); | |
595 | ||
596 | rcu_read_lock_bh(); | |
597 | macsec_encrypt_finish(skb, dev); | |
598 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
599 | len = skb->len; | |
600 | ret = dev_queue_xmit(skb); | |
601 | count_tx(dev, ret, len); | |
602 | rcu_read_unlock_bh(); | |
603 | ||
604 | macsec_txsa_put(sa); | |
605 | dev_put(dev); | |
606 | } | |
607 | ||
5d9649b3 SD |
608 | static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
609 | unsigned char **iv, | |
610 | struct scatterlist **sg) | |
611 | { | |
612 | size_t size, iv_offset, sg_offset; | |
613 | struct aead_request *req; | |
614 | void *tmp; | |
615 | ||
616 | size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); | |
617 | iv_offset = size; | |
618 | size += GCM_AES_IV_LEN; | |
619 | ||
620 | size = ALIGN(size, __alignof__(struct scatterlist)); | |
621 | sg_offset = size; | |
622 | size += sizeof(struct scatterlist) * (MAX_SKB_FRAGS + 1); | |
623 | ||
624 | tmp = kmalloc(size, GFP_ATOMIC); | |
625 | if (!tmp) | |
626 | return NULL; | |
627 | ||
628 | *iv = (unsigned char *)(tmp + iv_offset); | |
629 | *sg = (struct scatterlist *)(tmp + sg_offset); | |
630 | req = tmp; | |
631 | ||
632 | aead_request_set_tfm(req, tfm); | |
633 | ||
634 | return req; | |
635 | } | |
636 | ||
c09440f7 SD |
637 | static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
638 | struct net_device *dev) | |
639 | { | |
640 | int ret; | |
5d9649b3 SD |
641 | struct scatterlist *sg; |
642 | unsigned char *iv; | |
c09440f7 SD |
643 | struct ethhdr *eth; |
644 | struct macsec_eth_header *hh; | |
645 | size_t unprotected_len; | |
646 | struct aead_request *req; | |
647 | struct macsec_secy *secy; | |
648 | struct macsec_tx_sc *tx_sc; | |
649 | struct macsec_tx_sa *tx_sa; | |
650 | struct macsec_dev *macsec = macsec_priv(dev); | |
651 | u32 pn; | |
652 | ||
653 | secy = &macsec->secy; | |
654 | tx_sc = &secy->tx_sc; | |
655 | ||
656 | /* 10.5.1 TX SA assignment */ | |
657 | tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]); | |
658 | if (!tx_sa) { | |
659 | secy->operational = false; | |
660 | kfree_skb(skb); | |
661 | return ERR_PTR(-EINVAL); | |
662 | } | |
663 | ||
664 | if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || | |
665 | skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { | |
666 | struct sk_buff *nskb = skb_copy_expand(skb, | |
667 | MACSEC_NEEDED_HEADROOM, | |
668 | MACSEC_NEEDED_TAILROOM, | |
669 | GFP_ATOMIC); | |
670 | if (likely(nskb)) { | |
671 | consume_skb(skb); | |
672 | skb = nskb; | |
673 | } else { | |
674 | macsec_txsa_put(tx_sa); | |
675 | kfree_skb(skb); | |
676 | return ERR_PTR(-ENOMEM); | |
677 | } | |
678 | } else { | |
679 | skb = skb_unshare(skb, GFP_ATOMIC); | |
680 | if (!skb) { | |
681 | macsec_txsa_put(tx_sa); | |
682 | return ERR_PTR(-ENOMEM); | |
683 | } | |
684 | } | |
685 | ||
686 | unprotected_len = skb->len; | |
687 | eth = eth_hdr(skb); | |
688 | hh = (struct macsec_eth_header *)skb_push(skb, macsec_extra_len(tx_sc->send_sci)); | |
689 | memmove(hh, eth, 2 * ETH_ALEN); | |
690 | ||
691 | pn = tx_sa_update_pn(tx_sa, secy); | |
692 | if (pn == 0) { | |
693 | macsec_txsa_put(tx_sa); | |
694 | kfree_skb(skb); | |
695 | return ERR_PTR(-ENOLINK); | |
696 | } | |
697 | macsec_fill_sectag(hh, secy, pn); | |
698 | macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN); | |
699 | ||
c09440f7 SD |
700 | skb_put(skb, secy->icv_len); |
701 | ||
702 | if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { | |
703 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
704 | ||
705 | u64_stats_update_begin(&secy_stats->syncp); | |
706 | secy_stats->stats.OutPktsTooLong++; | |
707 | u64_stats_update_end(&secy_stats->syncp); | |
708 | ||
709 | macsec_txsa_put(tx_sa); | |
710 | kfree_skb(skb); | |
711 | return ERR_PTR(-EINVAL); | |
712 | } | |
713 | ||
5d9649b3 | 714 | req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg); |
c09440f7 SD |
715 | if (!req) { |
716 | macsec_txsa_put(tx_sa); | |
717 | kfree_skb(skb); | |
718 | return ERR_PTR(-ENOMEM); | |
719 | } | |
720 | ||
5d9649b3 SD |
721 | macsec_fill_iv(iv, secy->sci, pn); |
722 | ||
c09440f7 SD |
723 | sg_init_table(sg, MAX_SKB_FRAGS + 1); |
724 | skb_to_sgvec(skb, sg, 0, skb->len); | |
725 | ||
726 | if (tx_sc->encrypt) { | |
727 | int len = skb->len - macsec_hdr_len(tx_sc->send_sci) - | |
728 | secy->icv_len; | |
729 | aead_request_set_crypt(req, sg, sg, len, iv); | |
730 | aead_request_set_ad(req, macsec_hdr_len(tx_sc->send_sci)); | |
731 | } else { | |
732 | aead_request_set_crypt(req, sg, sg, 0, iv); | |
733 | aead_request_set_ad(req, skb->len - secy->icv_len); | |
734 | } | |
735 | ||
736 | macsec_skb_cb(skb)->req = req; | |
737 | macsec_skb_cb(skb)->tx_sa = tx_sa; | |
738 | aead_request_set_callback(req, 0, macsec_encrypt_done, skb); | |
739 | ||
740 | dev_hold(skb->dev); | |
741 | ret = crypto_aead_encrypt(req); | |
742 | if (ret == -EINPROGRESS) { | |
743 | return ERR_PTR(ret); | |
744 | } else if (ret != 0) { | |
745 | dev_put(skb->dev); | |
746 | kfree_skb(skb); | |
747 | aead_request_free(req); | |
748 | macsec_txsa_put(tx_sa); | |
749 | return ERR_PTR(-EINVAL); | |
750 | } | |
751 | ||
752 | dev_put(skb->dev); | |
753 | aead_request_free(req); | |
754 | macsec_txsa_put(tx_sa); | |
755 | ||
756 | return skb; | |
757 | } | |
758 | ||
759 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) | |
760 | { | |
761 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
762 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); | |
763 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); | |
764 | u32 lowest_pn = 0; | |
765 | ||
766 | spin_lock(&rx_sa->lock); | |
767 | if (rx_sa->next_pn >= secy->replay_window) | |
768 | lowest_pn = rx_sa->next_pn - secy->replay_window; | |
769 | ||
770 | /* Now perform replay protection check again | |
771 | * (see IEEE 802.1AE-2006 figure 10-5) | |
772 | */ | |
773 | if (secy->replay_protect && pn < lowest_pn) { | |
774 | spin_unlock(&rx_sa->lock); | |
775 | u64_stats_update_begin(&rxsc_stats->syncp); | |
776 | rxsc_stats->stats.InPktsLate++; | |
777 | u64_stats_update_end(&rxsc_stats->syncp); | |
778 | return false; | |
779 | } | |
780 | ||
781 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { | |
782 | u64_stats_update_begin(&rxsc_stats->syncp); | |
783 | if (hdr->tci_an & MACSEC_TCI_E) | |
784 | rxsc_stats->stats.InOctetsDecrypted += skb->len; | |
785 | else | |
786 | rxsc_stats->stats.InOctetsValidated += skb->len; | |
787 | u64_stats_update_end(&rxsc_stats->syncp); | |
788 | } | |
789 | ||
790 | if (!macsec_skb_cb(skb)->valid) { | |
791 | spin_unlock(&rx_sa->lock); | |
792 | ||
793 | /* 10.6.5 */ | |
794 | if (hdr->tci_an & MACSEC_TCI_C || | |
795 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
796 | u64_stats_update_begin(&rxsc_stats->syncp); | |
797 | rxsc_stats->stats.InPktsNotValid++; | |
798 | u64_stats_update_end(&rxsc_stats->syncp); | |
799 | return false; | |
800 | } | |
801 | ||
802 | u64_stats_update_begin(&rxsc_stats->syncp); | |
803 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { | |
804 | rxsc_stats->stats.InPktsInvalid++; | |
805 | this_cpu_inc(rx_sa->stats->InPktsInvalid); | |
806 | } else if (pn < lowest_pn) { | |
807 | rxsc_stats->stats.InPktsDelayed++; | |
808 | } else { | |
809 | rxsc_stats->stats.InPktsUnchecked++; | |
810 | } | |
811 | u64_stats_update_end(&rxsc_stats->syncp); | |
812 | } else { | |
813 | u64_stats_update_begin(&rxsc_stats->syncp); | |
814 | if (pn < lowest_pn) { | |
815 | rxsc_stats->stats.InPktsDelayed++; | |
816 | } else { | |
817 | rxsc_stats->stats.InPktsOK++; | |
818 | this_cpu_inc(rx_sa->stats->InPktsOK); | |
819 | } | |
820 | u64_stats_update_end(&rxsc_stats->syncp); | |
821 | ||
822 | if (pn >= rx_sa->next_pn) | |
823 | rx_sa->next_pn = pn + 1; | |
824 | spin_unlock(&rx_sa->lock); | |
825 | } | |
826 | ||
827 | return true; | |
828 | } | |
829 | ||
830 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) | |
831 | { | |
832 | skb->pkt_type = PACKET_HOST; | |
833 | skb->protocol = eth_type_trans(skb, dev); | |
834 | ||
835 | skb_reset_network_header(skb); | |
836 | if (!skb_transport_header_was_set(skb)) | |
837 | skb_reset_transport_header(skb); | |
838 | skb_reset_mac_len(skb); | |
839 | } | |
840 | ||
841 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) | |
842 | { | |
843 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); | |
844 | skb_pull(skb, hdr_len); | |
845 | pskb_trim_unique(skb, skb->len - icv_len); | |
846 | } | |
847 | ||
848 | static void count_rx(struct net_device *dev, int len) | |
849 | { | |
850 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
851 | ||
852 | u64_stats_update_begin(&stats->syncp); | |
853 | stats->rx_packets++; | |
854 | stats->rx_bytes += len; | |
855 | u64_stats_update_end(&stats->syncp); | |
856 | } | |
857 | ||
858 | static void macsec_decrypt_done(struct crypto_async_request *base, int err) | |
859 | { | |
860 | struct sk_buff *skb = base->data; | |
861 | struct net_device *dev = skb->dev; | |
862 | struct macsec_dev *macsec = macsec_priv(dev); | |
863 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
864 | int len, ret; | |
865 | u32 pn; | |
866 | ||
867 | aead_request_free(macsec_skb_cb(skb)->req); | |
868 | ||
869 | rcu_read_lock_bh(); | |
870 | pn = ntohl(macsec_ethhdr(skb)->packet_number); | |
871 | if (!macsec_post_decrypt(skb, &macsec->secy, pn)) { | |
872 | rcu_read_unlock_bh(); | |
873 | kfree_skb(skb); | |
874 | goto out; | |
875 | } | |
876 | ||
877 | macsec_finalize_skb(skb, macsec->secy.icv_len, | |
878 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
879 | macsec_reset_skb(skb, macsec->secy.netdev); | |
880 | ||
881 | len = skb->len; | |
882 | ret = netif_rx(skb); | |
883 | if (ret == NET_RX_SUCCESS) | |
884 | count_rx(dev, len); | |
885 | else | |
886 | macsec->secy.netdev->stats.rx_dropped++; | |
887 | ||
888 | rcu_read_unlock_bh(); | |
889 | ||
890 | out: | |
891 | macsec_rxsa_put(rx_sa); | |
892 | dev_put(dev); | |
c09440f7 SD |
893 | } |
894 | ||
895 | static struct sk_buff *macsec_decrypt(struct sk_buff *skb, | |
896 | struct net_device *dev, | |
897 | struct macsec_rx_sa *rx_sa, | |
898 | sci_t sci, | |
899 | struct macsec_secy *secy) | |
900 | { | |
901 | int ret; | |
5d9649b3 SD |
902 | struct scatterlist *sg; |
903 | unsigned char *iv; | |
c09440f7 SD |
904 | struct aead_request *req; |
905 | struct macsec_eth_header *hdr; | |
906 | u16 icv_len = secy->icv_len; | |
907 | ||
908 | macsec_skb_cb(skb)->valid = false; | |
909 | skb = skb_share_check(skb, GFP_ATOMIC); | |
910 | if (!skb) | |
c3b7d0bd | 911 | return ERR_PTR(-ENOMEM); |
c09440f7 | 912 | |
5d9649b3 | 913 | req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg); |
c09440f7 SD |
914 | if (!req) { |
915 | kfree_skb(skb); | |
c3b7d0bd | 916 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
917 | } |
918 | ||
919 | hdr = (struct macsec_eth_header *)skb->data; | |
920 | macsec_fill_iv(iv, sci, ntohl(hdr->packet_number)); | |
921 | ||
922 | sg_init_table(sg, MAX_SKB_FRAGS + 1); | |
923 | skb_to_sgvec(skb, sg, 0, skb->len); | |
924 | ||
925 | if (hdr->tci_an & MACSEC_TCI_E) { | |
926 | /* confidentiality: ethernet + macsec header | |
927 | * authenticated, encrypted payload | |
928 | */ | |
929 | int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci); | |
930 | ||
931 | aead_request_set_crypt(req, sg, sg, len, iv); | |
932 | aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci)); | |
933 | skb = skb_unshare(skb, GFP_ATOMIC); | |
934 | if (!skb) { | |
935 | aead_request_free(req); | |
c3b7d0bd | 936 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
937 | } |
938 | } else { | |
939 | /* integrity only: all headers + data authenticated */ | |
940 | aead_request_set_crypt(req, sg, sg, icv_len, iv); | |
941 | aead_request_set_ad(req, skb->len - icv_len); | |
942 | } | |
943 | ||
944 | macsec_skb_cb(skb)->req = req; | |
945 | macsec_skb_cb(skb)->rx_sa = rx_sa; | |
946 | skb->dev = dev; | |
947 | aead_request_set_callback(req, 0, macsec_decrypt_done, skb); | |
948 | ||
949 | dev_hold(dev); | |
950 | ret = crypto_aead_decrypt(req); | |
951 | if (ret == -EINPROGRESS) { | |
c3b7d0bd | 952 | return ERR_PTR(ret); |
c09440f7 SD |
953 | } else if (ret != 0) { |
954 | /* decryption/authentication failed | |
955 | * 10.6 if validateFrames is disabled, deliver anyway | |
956 | */ | |
957 | if (ret != -EBADMSG) { | |
958 | kfree_skb(skb); | |
c3b7d0bd | 959 | skb = ERR_PTR(ret); |
c09440f7 SD |
960 | } |
961 | } else { | |
962 | macsec_skb_cb(skb)->valid = true; | |
963 | } | |
964 | dev_put(dev); | |
965 | ||
966 | aead_request_free(req); | |
967 | ||
968 | return skb; | |
969 | } | |
970 | ||
971 | static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) | |
972 | { | |
973 | struct macsec_rx_sc *rx_sc; | |
974 | ||
975 | for_each_rxsc(secy, rx_sc) { | |
976 | if (rx_sc->sci == sci) | |
977 | return rx_sc; | |
978 | } | |
979 | ||
980 | return NULL; | |
981 | } | |
982 | ||
983 | static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) | |
984 | { | |
985 | struct macsec_rx_sc *rx_sc; | |
986 | ||
987 | for_each_rxsc_rtnl(secy, rx_sc) { | |
988 | if (rx_sc->sci == sci) | |
989 | return rx_sc; | |
990 | } | |
991 | ||
992 | return NULL; | |
993 | } | |
994 | ||
995 | static void handle_not_macsec(struct sk_buff *skb) | |
996 | { | |
997 | struct macsec_rxh_data *rxd; | |
998 | struct macsec_dev *macsec; | |
999 | ||
1000 | rcu_read_lock(); | |
1001 | rxd = macsec_data_rcu(skb->dev); | |
1002 | ||
1003 | /* 10.6 If the management control validateFrames is not | |
1004 | * Strict, frames without a SecTAG are received, counted, and | |
1005 | * delivered to the Controlled Port | |
1006 | */ | |
1007 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1008 | struct sk_buff *nskb; | |
1009 | int ret; | |
1010 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
1011 | ||
1012 | if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1013 | u64_stats_update_begin(&secy_stats->syncp); | |
1014 | secy_stats->stats.InPktsNoTag++; | |
1015 | u64_stats_update_end(&secy_stats->syncp); | |
1016 | continue; | |
1017 | } | |
1018 | ||
1019 | /* deliver on this port */ | |
1020 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1021 | if (!nskb) | |
1022 | break; | |
1023 | ||
1024 | nskb->dev = macsec->secy.netdev; | |
1025 | ||
1026 | ret = netif_rx(nskb); | |
1027 | if (ret == NET_RX_SUCCESS) { | |
1028 | u64_stats_update_begin(&secy_stats->syncp); | |
1029 | secy_stats->stats.InPktsUntagged++; | |
1030 | u64_stats_update_end(&secy_stats->syncp); | |
1031 | } else { | |
1032 | macsec->secy.netdev->stats.rx_dropped++; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | rcu_read_unlock(); | |
1037 | } | |
1038 | ||
1039 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) | |
1040 | { | |
1041 | struct sk_buff *skb = *pskb; | |
1042 | struct net_device *dev = skb->dev; | |
1043 | struct macsec_eth_header *hdr; | |
1044 | struct macsec_secy *secy = NULL; | |
1045 | struct macsec_rx_sc *rx_sc; | |
1046 | struct macsec_rx_sa *rx_sa; | |
1047 | struct macsec_rxh_data *rxd; | |
1048 | struct macsec_dev *macsec; | |
1049 | sci_t sci; | |
1050 | u32 pn; | |
1051 | bool cbit; | |
1052 | struct pcpu_rx_sc_stats *rxsc_stats; | |
1053 | struct pcpu_secy_stats *secy_stats; | |
1054 | bool pulled_sci; | |
1055 | ||
1056 | if (skb_headroom(skb) < ETH_HLEN) | |
1057 | goto drop_direct; | |
1058 | ||
1059 | hdr = macsec_ethhdr(skb); | |
1060 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) { | |
1061 | handle_not_macsec(skb); | |
1062 | ||
1063 | /* and deliver to the uncontrolled port */ | |
1064 | return RX_HANDLER_PASS; | |
1065 | } | |
1066 | ||
1067 | skb = skb_unshare(skb, GFP_ATOMIC); | |
1068 | if (!skb) { | |
1069 | *pskb = NULL; | |
1070 | return RX_HANDLER_CONSUMED; | |
1071 | } | |
1072 | ||
1073 | pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); | |
1074 | if (!pulled_sci) { | |
1075 | if (!pskb_may_pull(skb, macsec_extra_len(false))) | |
1076 | goto drop_direct; | |
1077 | } | |
1078 | ||
1079 | hdr = macsec_ethhdr(skb); | |
1080 | ||
1081 | /* Frames with a SecTAG that has the TCI E bit set but the C | |
1082 | * bit clear are discarded, as this reserved encoding is used | |
1083 | * to identify frames with a SecTAG that are not to be | |
1084 | * delivered to the Controlled Port. | |
1085 | */ | |
1086 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) | |
1087 | return RX_HANDLER_PASS; | |
1088 | ||
1089 | /* now, pull the extra length */ | |
1090 | if (hdr->tci_an & MACSEC_TCI_SC) { | |
1091 | if (!pulled_sci) | |
1092 | goto drop_direct; | |
1093 | } | |
1094 | ||
1095 | /* ethernet header is part of crypto processing */ | |
1096 | skb_push(skb, ETH_HLEN); | |
1097 | ||
1098 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); | |
1099 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; | |
1100 | sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); | |
1101 | ||
1102 | rcu_read_lock(); | |
1103 | rxd = macsec_data_rcu(skb->dev); | |
1104 | ||
1105 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1106 | struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); | |
1107 | ||
1108 | if (sc) { | |
1109 | secy = &macsec->secy; | |
1110 | rx_sc = sc; | |
1111 | break; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | if (!secy) | |
1116 | goto nosci; | |
1117 | ||
1118 | dev = secy->netdev; | |
1119 | macsec = macsec_priv(dev); | |
1120 | secy_stats = this_cpu_ptr(macsec->stats); | |
1121 | rxsc_stats = this_cpu_ptr(rx_sc->stats); | |
1122 | ||
1123 | if (!macsec_validate_skb(skb, secy->icv_len)) { | |
1124 | u64_stats_update_begin(&secy_stats->syncp); | |
1125 | secy_stats->stats.InPktsBadTag++; | |
1126 | u64_stats_update_end(&secy_stats->syncp); | |
1127 | goto drop_nosa; | |
1128 | } | |
1129 | ||
1130 | rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); | |
1131 | if (!rx_sa) { | |
1132 | /* 10.6.1 if the SA is not in use */ | |
1133 | ||
1134 | /* If validateFrames is Strict or the C bit in the | |
1135 | * SecTAG is set, discard | |
1136 | */ | |
1137 | if (hdr->tci_an & MACSEC_TCI_C || | |
1138 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
1139 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1140 | rxsc_stats->stats.InPktsNotUsingSA++; | |
1141 | u64_stats_update_end(&rxsc_stats->syncp); | |
1142 | goto drop_nosa; | |
1143 | } | |
1144 | ||
1145 | /* not Strict, the frame (with the SecTAG and ICV | |
1146 | * removed) is delivered to the Controlled Port. | |
1147 | */ | |
1148 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1149 | rxsc_stats->stats.InPktsUnusedSA++; | |
1150 | u64_stats_update_end(&rxsc_stats->syncp); | |
1151 | goto deliver; | |
1152 | } | |
1153 | ||
1154 | /* First, PN check to avoid decrypting obviously wrong packets */ | |
1155 | pn = ntohl(hdr->packet_number); | |
1156 | if (secy->replay_protect) { | |
1157 | bool late; | |
1158 | ||
1159 | spin_lock(&rx_sa->lock); | |
1160 | late = rx_sa->next_pn >= secy->replay_window && | |
1161 | pn < (rx_sa->next_pn - secy->replay_window); | |
1162 | spin_unlock(&rx_sa->lock); | |
1163 | ||
1164 | if (late) { | |
1165 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1166 | rxsc_stats->stats.InPktsLate++; | |
1167 | u64_stats_update_end(&rxsc_stats->syncp); | |
1168 | goto drop; | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | /* Disabled && !changed text => skip validation */ | |
1173 | if (hdr->tci_an & MACSEC_TCI_C || | |
1174 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) | |
1175 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); | |
1176 | ||
c3b7d0bd SD |
1177 | if (IS_ERR(skb)) { |
1178 | /* the decrypt callback needs the reference */ | |
1179 | if (PTR_ERR(skb) != -EINPROGRESS) | |
1180 | macsec_rxsa_put(rx_sa); | |
c09440f7 SD |
1181 | rcu_read_unlock(); |
1182 | *pskb = NULL; | |
1183 | return RX_HANDLER_CONSUMED; | |
1184 | } | |
1185 | ||
1186 | if (!macsec_post_decrypt(skb, secy, pn)) | |
1187 | goto drop; | |
1188 | ||
1189 | deliver: | |
1190 | macsec_finalize_skb(skb, secy->icv_len, | |
1191 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1192 | macsec_reset_skb(skb, secy->netdev); | |
1193 | ||
497f358a SD |
1194 | if (rx_sa) |
1195 | macsec_rxsa_put(rx_sa); | |
c09440f7 SD |
1196 | count_rx(dev, skb->len); |
1197 | ||
1198 | rcu_read_unlock(); | |
1199 | ||
1200 | *pskb = skb; | |
1201 | return RX_HANDLER_ANOTHER; | |
1202 | ||
1203 | drop: | |
1204 | macsec_rxsa_put(rx_sa); | |
1205 | drop_nosa: | |
1206 | rcu_read_unlock(); | |
1207 | drop_direct: | |
1208 | kfree_skb(skb); | |
1209 | *pskb = NULL; | |
1210 | return RX_HANDLER_CONSUMED; | |
1211 | ||
1212 | nosci: | |
1213 | /* 10.6.1 if the SC is not found */ | |
1214 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); | |
1215 | if (!cbit) | |
1216 | macsec_finalize_skb(skb, DEFAULT_ICV_LEN, | |
1217 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1218 | ||
1219 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1220 | struct sk_buff *nskb; | |
1221 | int ret; | |
1222 | ||
1223 | secy_stats = this_cpu_ptr(macsec->stats); | |
1224 | ||
1225 | /* If validateFrames is Strict or the C bit in the | |
1226 | * SecTAG is set, discard | |
1227 | */ | |
1228 | if (cbit || | |
1229 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1230 | u64_stats_update_begin(&secy_stats->syncp); | |
1231 | secy_stats->stats.InPktsNoSCI++; | |
1232 | u64_stats_update_end(&secy_stats->syncp); | |
1233 | continue; | |
1234 | } | |
1235 | ||
1236 | /* not strict, the frame (with the SecTAG and ICV | |
1237 | * removed) is delivered to the Controlled Port. | |
1238 | */ | |
1239 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1240 | if (!nskb) | |
1241 | break; | |
1242 | ||
1243 | macsec_reset_skb(nskb, macsec->secy.netdev); | |
1244 | ||
1245 | ret = netif_rx(nskb); | |
1246 | if (ret == NET_RX_SUCCESS) { | |
1247 | u64_stats_update_begin(&secy_stats->syncp); | |
1248 | secy_stats->stats.InPktsUnknownSCI++; | |
1249 | u64_stats_update_end(&secy_stats->syncp); | |
1250 | } else { | |
1251 | macsec->secy.netdev->stats.rx_dropped++; | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | rcu_read_unlock(); | |
1256 | *pskb = skb; | |
1257 | return RX_HANDLER_PASS; | |
1258 | } | |
1259 | ||
1260 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) | |
1261 | { | |
1262 | struct crypto_aead *tfm; | |
1263 | int ret; | |
1264 | ||
6052f7fb | 1265 | tfm = crypto_alloc_aead("gcm(aes)", 0, 0); |
c09440f7 SD |
1266 | if (!tfm || IS_ERR(tfm)) |
1267 | return NULL; | |
1268 | ||
1269 | ret = crypto_aead_setkey(tfm, key, key_len); | |
1270 | if (ret < 0) { | |
1271 | crypto_free_aead(tfm); | |
1272 | return NULL; | |
1273 | } | |
1274 | ||
1275 | ret = crypto_aead_setauthsize(tfm, icv_len); | |
1276 | if (ret < 0) { | |
1277 | crypto_free_aead(tfm); | |
1278 | return NULL; | |
1279 | } | |
1280 | ||
1281 | return tfm; | |
1282 | } | |
1283 | ||
1284 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, | |
1285 | int icv_len) | |
1286 | { | |
1287 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); | |
1288 | if (!rx_sa->stats) | |
1289 | return -1; | |
1290 | ||
1291 | rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
1292 | if (!rx_sa->key.tfm) { | |
1293 | free_percpu(rx_sa->stats); | |
1294 | return -1; | |
1295 | } | |
1296 | ||
1297 | rx_sa->active = false; | |
1298 | rx_sa->next_pn = 1; | |
1299 | atomic_set(&rx_sa->refcnt, 1); | |
1300 | spin_lock_init(&rx_sa->lock); | |
1301 | ||
1302 | return 0; | |
1303 | } | |
1304 | ||
1305 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) | |
1306 | { | |
1307 | rx_sa->active = false; | |
1308 | ||
1309 | macsec_rxsa_put(rx_sa); | |
1310 | } | |
1311 | ||
1312 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) | |
1313 | { | |
1314 | int i; | |
1315 | ||
1316 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
1317 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); | |
1318 | ||
1319 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); | |
1320 | if (sa) | |
1321 | clear_rx_sa(sa); | |
1322 | } | |
1323 | ||
1324 | macsec_rxsc_put(rx_sc); | |
1325 | } | |
1326 | ||
1327 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1328 | { | |
1329 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; | |
1330 | ||
1331 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); | |
1332 | rx_sc; | |
1333 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { | |
1334 | if (rx_sc->sci == sci) { | |
1335 | if (rx_sc->active) | |
1336 | secy->n_rx_sc--; | |
1337 | rcu_assign_pointer(*rx_scp, rx_sc->next); | |
1338 | return rx_sc; | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | return NULL; | |
1343 | } | |
1344 | ||
1345 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci) | |
1346 | { | |
1347 | struct macsec_rx_sc *rx_sc; | |
1348 | struct macsec_dev *macsec; | |
1349 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
1350 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
1351 | struct macsec_secy *secy; | |
1352 | ||
1353 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
1354 | if (find_rx_sc_rtnl(&macsec->secy, sci)) | |
1355 | return ERR_PTR(-EEXIST); | |
1356 | } | |
1357 | ||
1358 | rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); | |
1359 | if (!rx_sc) | |
1360 | return ERR_PTR(-ENOMEM); | |
1361 | ||
1362 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); | |
1363 | if (!rx_sc->stats) { | |
1364 | kfree(rx_sc); | |
1365 | return ERR_PTR(-ENOMEM); | |
1366 | } | |
1367 | ||
1368 | rx_sc->sci = sci; | |
1369 | rx_sc->active = true; | |
1370 | atomic_set(&rx_sc->refcnt, 1); | |
1371 | ||
1372 | secy = &macsec_priv(dev)->secy; | |
1373 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); | |
1374 | rcu_assign_pointer(secy->rx_sc, rx_sc); | |
1375 | ||
1376 | if (rx_sc->active) | |
1377 | secy->n_rx_sc++; | |
1378 | ||
1379 | return rx_sc; | |
1380 | } | |
1381 | ||
1382 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, | |
1383 | int icv_len) | |
1384 | { | |
1385 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); | |
1386 | if (!tx_sa->stats) | |
1387 | return -1; | |
1388 | ||
1389 | tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
1390 | if (!tx_sa->key.tfm) { | |
1391 | free_percpu(tx_sa->stats); | |
1392 | return -1; | |
1393 | } | |
1394 | ||
1395 | tx_sa->active = false; | |
1396 | atomic_set(&tx_sa->refcnt, 1); | |
1397 | spin_lock_init(&tx_sa->lock); | |
1398 | ||
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) | |
1403 | { | |
1404 | tx_sa->active = false; | |
1405 | ||
1406 | macsec_txsa_put(tx_sa); | |
1407 | } | |
1408 | ||
1409 | static struct genl_family macsec_fam = { | |
1410 | .id = GENL_ID_GENERATE, | |
1411 | .name = MACSEC_GENL_NAME, | |
1412 | .hdrsize = 0, | |
1413 | .version = MACSEC_GENL_VERSION, | |
1414 | .maxattr = MACSEC_ATTR_MAX, | |
1415 | .netnsok = true, | |
1416 | }; | |
1417 | ||
1418 | static struct net_device *get_dev_from_nl(struct net *net, | |
1419 | struct nlattr **attrs) | |
1420 | { | |
1421 | int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); | |
1422 | struct net_device *dev; | |
1423 | ||
1424 | dev = __dev_get_by_index(net, ifindex); | |
1425 | if (!dev) | |
1426 | return ERR_PTR(-ENODEV); | |
1427 | ||
1428 | if (!netif_is_macsec(dev)) | |
1429 | return ERR_PTR(-ENODEV); | |
1430 | ||
1431 | return dev; | |
1432 | } | |
1433 | ||
1434 | static sci_t nla_get_sci(const struct nlattr *nla) | |
1435 | { | |
1436 | return (__force sci_t)nla_get_u64(nla); | |
1437 | } | |
1438 | ||
f60d94c0 ND |
1439 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1440 | int padattr) | |
c09440f7 | 1441 | { |
f60d94c0 | 1442 | return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
c09440f7 SD |
1443 | } |
1444 | ||
1445 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, | |
1446 | struct nlattr **attrs, | |
1447 | struct nlattr **tb_sa, | |
1448 | struct net_device **devp, | |
1449 | struct macsec_secy **secyp, | |
1450 | struct macsec_tx_sc **scp, | |
1451 | u8 *assoc_num) | |
1452 | { | |
1453 | struct net_device *dev; | |
1454 | struct macsec_secy *secy; | |
1455 | struct macsec_tx_sc *tx_sc; | |
1456 | struct macsec_tx_sa *tx_sa; | |
1457 | ||
1458 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1459 | return ERR_PTR(-EINVAL); | |
1460 | ||
1461 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1462 | ||
1463 | dev = get_dev_from_nl(net, attrs); | |
1464 | if (IS_ERR(dev)) | |
1465 | return ERR_CAST(dev); | |
1466 | ||
1467 | if (*assoc_num >= MACSEC_NUM_AN) | |
1468 | return ERR_PTR(-EINVAL); | |
1469 | ||
1470 | secy = &macsec_priv(dev)->secy; | |
1471 | tx_sc = &secy->tx_sc; | |
1472 | ||
1473 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); | |
1474 | if (!tx_sa) | |
1475 | return ERR_PTR(-ENODEV); | |
1476 | ||
1477 | *devp = dev; | |
1478 | *scp = tx_sc; | |
1479 | *secyp = secy; | |
1480 | return tx_sa; | |
1481 | } | |
1482 | ||
1483 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, | |
1484 | struct nlattr **attrs, | |
1485 | struct nlattr **tb_rxsc, | |
1486 | struct net_device **devp, | |
1487 | struct macsec_secy **secyp) | |
1488 | { | |
1489 | struct net_device *dev; | |
1490 | struct macsec_secy *secy; | |
1491 | struct macsec_rx_sc *rx_sc; | |
1492 | sci_t sci; | |
1493 | ||
1494 | dev = get_dev_from_nl(net, attrs); | |
1495 | if (IS_ERR(dev)) | |
1496 | return ERR_CAST(dev); | |
1497 | ||
1498 | secy = &macsec_priv(dev)->secy; | |
1499 | ||
1500 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1501 | return ERR_PTR(-EINVAL); | |
1502 | ||
1503 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1504 | rx_sc = find_rx_sc_rtnl(secy, sci); | |
1505 | if (!rx_sc) | |
1506 | return ERR_PTR(-ENODEV); | |
1507 | ||
1508 | *secyp = secy; | |
1509 | *devp = dev; | |
1510 | ||
1511 | return rx_sc; | |
1512 | } | |
1513 | ||
1514 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, | |
1515 | struct nlattr **attrs, | |
1516 | struct nlattr **tb_rxsc, | |
1517 | struct nlattr **tb_sa, | |
1518 | struct net_device **devp, | |
1519 | struct macsec_secy **secyp, | |
1520 | struct macsec_rx_sc **scp, | |
1521 | u8 *assoc_num) | |
1522 | { | |
1523 | struct macsec_rx_sc *rx_sc; | |
1524 | struct macsec_rx_sa *rx_sa; | |
1525 | ||
1526 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1527 | return ERR_PTR(-EINVAL); | |
1528 | ||
1529 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1530 | if (*assoc_num >= MACSEC_NUM_AN) | |
1531 | return ERR_PTR(-EINVAL); | |
1532 | ||
1533 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); | |
1534 | if (IS_ERR(rx_sc)) | |
1535 | return ERR_CAST(rx_sc); | |
1536 | ||
1537 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); | |
1538 | if (!rx_sa) | |
1539 | return ERR_PTR(-ENODEV); | |
1540 | ||
1541 | *scp = rx_sc; | |
1542 | return rx_sa; | |
1543 | } | |
1544 | ||
1545 | ||
1546 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { | |
1547 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
1548 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, | |
1549 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, | |
1550 | }; | |
1551 | ||
1552 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { | |
1553 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, | |
1554 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1555 | }; | |
1556 | ||
1557 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { | |
1558 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, | |
1559 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1560 | [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 }, | |
8acca6ac SD |
1561 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1562 | .len = MACSEC_KEYID_LEN, }, | |
c09440f7 SD |
1563 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
1564 | .len = MACSEC_MAX_KEY_LEN, }, | |
1565 | }; | |
1566 | ||
1567 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) | |
1568 | { | |
1569 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) | |
1570 | return -EINVAL; | |
1571 | ||
1572 | if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], | |
1573 | macsec_genl_sa_policy)) | |
1574 | return -EINVAL; | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
1579 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) | |
1580 | { | |
1581 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) | |
1582 | return -EINVAL; | |
1583 | ||
1584 | if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], | |
1585 | macsec_genl_rxsc_policy)) | |
1586 | return -EINVAL; | |
1587 | ||
1588 | return 0; | |
1589 | } | |
1590 | ||
1591 | static bool validate_add_rxsa(struct nlattr **attrs) | |
1592 | { | |
1593 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1594 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1595 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1596 | return false; | |
1597 | ||
1598 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1599 | return false; | |
1600 | ||
1601 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1602 | return false; | |
1603 | ||
1604 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1605 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1606 | return false; | |
1607 | } | |
1608 | ||
8acca6ac SD |
1609 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1610 | return false; | |
1611 | ||
c09440f7 SD |
1612 | return true; |
1613 | } | |
1614 | ||
1615 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1616 | { | |
1617 | struct net_device *dev; | |
1618 | struct nlattr **attrs = info->attrs; | |
1619 | struct macsec_secy *secy; | |
1620 | struct macsec_rx_sc *rx_sc; | |
1621 | struct macsec_rx_sa *rx_sa; | |
1622 | unsigned char assoc_num; | |
1623 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1624 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1625 | ||
1626 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1627 | return -EINVAL; | |
1628 | ||
1629 | if (parse_sa_config(attrs, tb_sa)) | |
1630 | return -EINVAL; | |
1631 | ||
1632 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1633 | return -EINVAL; | |
1634 | ||
1635 | if (!validate_add_rxsa(tb_sa)) | |
1636 | return -EINVAL; | |
1637 | ||
1638 | rtnl_lock(); | |
1639 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
1640 | if (IS_ERR(rx_sc) || !macsec_rxsc_get(rx_sc)) { | |
1641 | rtnl_unlock(); | |
1642 | return PTR_ERR(rx_sc); | |
1643 | } | |
1644 | ||
1645 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1646 | ||
1647 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1648 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", | |
1649 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1650 | rtnl_unlock(); | |
1651 | return -EINVAL; | |
1652 | } | |
1653 | ||
1654 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); | |
1655 | if (rx_sa) { | |
1656 | rtnl_unlock(); | |
1657 | return -EBUSY; | |
1658 | } | |
1659 | ||
1660 | rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); | |
72f2a05b SD |
1661 | if (!rx_sa || init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1662 | secy->key_len, secy->icv_len)) { | |
38787fc2 | 1663 | kfree(rx_sa); |
c09440f7 SD |
1664 | rtnl_unlock(); |
1665 | return -ENOMEM; | |
1666 | } | |
1667 | ||
1668 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
1669 | spin_lock_bh(&rx_sa->lock); | |
1670 | rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
1671 | spin_unlock_bh(&rx_sa->lock); | |
1672 | } | |
1673 | ||
1674 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1675 | rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1676 | ||
1968a0b8 | 1677 | nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
c09440f7 SD |
1678 | rx_sa->sc = rx_sc; |
1679 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); | |
1680 | ||
1681 | rtnl_unlock(); | |
1682 | ||
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | static bool validate_add_rxsc(struct nlattr **attrs) | |
1687 | { | |
1688 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) | |
1689 | return false; | |
1690 | ||
1691 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { | |
1692 | if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) | |
1693 | return false; | |
1694 | } | |
1695 | ||
1696 | return true; | |
1697 | } | |
1698 | ||
1699 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1700 | { | |
1701 | struct net_device *dev; | |
1702 | sci_t sci = MACSEC_UNDEF_SCI; | |
1703 | struct nlattr **attrs = info->attrs; | |
1704 | struct macsec_rx_sc *rx_sc; | |
1705 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1706 | ||
1707 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1708 | return -EINVAL; | |
1709 | ||
1710 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1711 | return -EINVAL; | |
1712 | ||
1713 | if (!validate_add_rxsc(tb_rxsc)) | |
1714 | return -EINVAL; | |
1715 | ||
1716 | rtnl_lock(); | |
1717 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1718 | if (IS_ERR(dev)) { | |
1719 | rtnl_unlock(); | |
1720 | return PTR_ERR(dev); | |
1721 | } | |
1722 | ||
1723 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1724 | ||
1725 | rx_sc = create_rx_sc(dev, sci); | |
1726 | if (IS_ERR(rx_sc)) { | |
1727 | rtnl_unlock(); | |
1728 | return PTR_ERR(rx_sc); | |
1729 | } | |
1730 | ||
1731 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) | |
1732 | rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
1733 | ||
1734 | rtnl_unlock(); | |
1735 | ||
1736 | return 0; | |
1737 | } | |
1738 | ||
1739 | static bool validate_add_txsa(struct nlattr **attrs) | |
1740 | { | |
1741 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1742 | !attrs[MACSEC_SA_ATTR_PN] || | |
1743 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1744 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1745 | return false; | |
1746 | ||
1747 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1748 | return false; | |
1749 | ||
1750 | if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1751 | return false; | |
1752 | ||
1753 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1754 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1755 | return false; | |
1756 | } | |
1757 | ||
8acca6ac SD |
1758 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1759 | return false; | |
1760 | ||
c09440f7 SD |
1761 | return true; |
1762 | } | |
1763 | ||
1764 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) | |
1765 | { | |
1766 | struct net_device *dev; | |
1767 | struct nlattr **attrs = info->attrs; | |
1768 | struct macsec_secy *secy; | |
1769 | struct macsec_tx_sc *tx_sc; | |
1770 | struct macsec_tx_sa *tx_sa; | |
1771 | unsigned char assoc_num; | |
1772 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1773 | ||
1774 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1775 | return -EINVAL; | |
1776 | ||
1777 | if (parse_sa_config(attrs, tb_sa)) | |
1778 | return -EINVAL; | |
1779 | ||
1780 | if (!validate_add_txsa(tb_sa)) | |
1781 | return -EINVAL; | |
1782 | ||
1783 | rtnl_lock(); | |
1784 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1785 | if (IS_ERR(dev)) { | |
1786 | rtnl_unlock(); | |
1787 | return PTR_ERR(dev); | |
1788 | } | |
1789 | ||
1790 | secy = &macsec_priv(dev)->secy; | |
1791 | tx_sc = &secy->tx_sc; | |
1792 | ||
1793 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1794 | ||
1795 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1796 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", | |
1797 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1798 | rtnl_unlock(); | |
1799 | return -EINVAL; | |
1800 | } | |
1801 | ||
1802 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); | |
1803 | if (tx_sa) { | |
1804 | rtnl_unlock(); | |
1805 | return -EBUSY; | |
1806 | } | |
1807 | ||
1808 | tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); | |
1809 | if (!tx_sa || init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), | |
1810 | secy->key_len, secy->icv_len)) { | |
38787fc2 | 1811 | kfree(tx_sa); |
c09440f7 SD |
1812 | rtnl_unlock(); |
1813 | return -ENOMEM; | |
1814 | } | |
1815 | ||
1968a0b8 | 1816 | nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
c09440f7 SD |
1817 | |
1818 | spin_lock_bh(&tx_sa->lock); | |
1819 | tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
1820 | spin_unlock_bh(&tx_sa->lock); | |
1821 | ||
1822 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1823 | tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1824 | ||
1825 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) | |
1826 | secy->operational = true; | |
1827 | ||
1828 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); | |
1829 | ||
1830 | rtnl_unlock(); | |
1831 | ||
1832 | return 0; | |
1833 | } | |
1834 | ||
1835 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1836 | { | |
1837 | struct nlattr **attrs = info->attrs; | |
1838 | struct net_device *dev; | |
1839 | struct macsec_secy *secy; | |
1840 | struct macsec_rx_sc *rx_sc; | |
1841 | struct macsec_rx_sa *rx_sa; | |
1842 | u8 assoc_num; | |
1843 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1844 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1845 | ||
1846 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1847 | return -EINVAL; | |
1848 | ||
1849 | if (parse_sa_config(attrs, tb_sa)) | |
1850 | return -EINVAL; | |
1851 | ||
1852 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1853 | return -EINVAL; | |
1854 | ||
1855 | rtnl_lock(); | |
1856 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
1857 | &dev, &secy, &rx_sc, &assoc_num); | |
1858 | if (IS_ERR(rx_sa)) { | |
1859 | rtnl_unlock(); | |
1860 | return PTR_ERR(rx_sa); | |
1861 | } | |
1862 | ||
1863 | if (rx_sa->active) { | |
1864 | rtnl_unlock(); | |
1865 | return -EBUSY; | |
1866 | } | |
1867 | ||
1868 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); | |
1869 | clear_rx_sa(rx_sa); | |
1870 | ||
1871 | rtnl_unlock(); | |
1872 | ||
1873 | return 0; | |
1874 | } | |
1875 | ||
1876 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1877 | { | |
1878 | struct nlattr **attrs = info->attrs; | |
1879 | struct net_device *dev; | |
1880 | struct macsec_secy *secy; | |
1881 | struct macsec_rx_sc *rx_sc; | |
1882 | sci_t sci; | |
1883 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1884 | ||
1885 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1886 | return -EINVAL; | |
1887 | ||
1888 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1889 | return -EINVAL; | |
1890 | ||
1891 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1892 | return -EINVAL; | |
1893 | ||
1894 | rtnl_lock(); | |
1895 | dev = get_dev_from_nl(genl_info_net(info), info->attrs); | |
1896 | if (IS_ERR(dev)) { | |
1897 | rtnl_unlock(); | |
1898 | return PTR_ERR(dev); | |
1899 | } | |
1900 | ||
1901 | secy = &macsec_priv(dev)->secy; | |
1902 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1903 | ||
1904 | rx_sc = del_rx_sc(secy, sci); | |
1905 | if (!rx_sc) { | |
1906 | rtnl_unlock(); | |
1907 | return -ENODEV; | |
1908 | } | |
1909 | ||
1910 | free_rx_sc(rx_sc); | |
1911 | rtnl_unlock(); | |
1912 | ||
1913 | return 0; | |
1914 | } | |
1915 | ||
1916 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) | |
1917 | { | |
1918 | struct nlattr **attrs = info->attrs; | |
1919 | struct net_device *dev; | |
1920 | struct macsec_secy *secy; | |
1921 | struct macsec_tx_sc *tx_sc; | |
1922 | struct macsec_tx_sa *tx_sa; | |
1923 | u8 assoc_num; | |
1924 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1925 | ||
1926 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1927 | return -EINVAL; | |
1928 | ||
1929 | if (parse_sa_config(attrs, tb_sa)) | |
1930 | return -EINVAL; | |
1931 | ||
1932 | rtnl_lock(); | |
1933 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
1934 | &dev, &secy, &tx_sc, &assoc_num); | |
1935 | if (IS_ERR(tx_sa)) { | |
1936 | rtnl_unlock(); | |
1937 | return PTR_ERR(tx_sa); | |
1938 | } | |
1939 | ||
1940 | if (tx_sa->active) { | |
1941 | rtnl_unlock(); | |
1942 | return -EBUSY; | |
1943 | } | |
1944 | ||
1945 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); | |
1946 | clear_tx_sa(tx_sa); | |
1947 | ||
1948 | rtnl_unlock(); | |
1949 | ||
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | static bool validate_upd_sa(struct nlattr **attrs) | |
1954 | { | |
1955 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1956 | attrs[MACSEC_SA_ATTR_KEY] || | |
1957 | attrs[MACSEC_SA_ATTR_KEYID]) | |
1958 | return false; | |
1959 | ||
1960 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1961 | return false; | |
1962 | ||
1963 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1964 | return false; | |
1965 | ||
1966 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1967 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1968 | return false; | |
1969 | } | |
1970 | ||
1971 | return true; | |
1972 | } | |
1973 | ||
1974 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) | |
1975 | { | |
1976 | struct nlattr **attrs = info->attrs; | |
1977 | struct net_device *dev; | |
1978 | struct macsec_secy *secy; | |
1979 | struct macsec_tx_sc *tx_sc; | |
1980 | struct macsec_tx_sa *tx_sa; | |
1981 | u8 assoc_num; | |
1982 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1983 | ||
1984 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1985 | return -EINVAL; | |
1986 | ||
1987 | if (parse_sa_config(attrs, tb_sa)) | |
1988 | return -EINVAL; | |
1989 | ||
1990 | if (!validate_upd_sa(tb_sa)) | |
1991 | return -EINVAL; | |
1992 | ||
1993 | rtnl_lock(); | |
1994 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
1995 | &dev, &secy, &tx_sc, &assoc_num); | |
1996 | if (IS_ERR(tx_sa)) { | |
1997 | rtnl_unlock(); | |
1998 | return PTR_ERR(tx_sa); | |
1999 | } | |
2000 | ||
2001 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2002 | spin_lock_bh(&tx_sa->lock); | |
2003 | tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
2004 | spin_unlock_bh(&tx_sa->lock); | |
2005 | } | |
2006 | ||
2007 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2008 | tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2009 | ||
2010 | if (assoc_num == tx_sc->encoding_sa) | |
2011 | secy->operational = tx_sa->active; | |
2012 | ||
2013 | rtnl_unlock(); | |
2014 | ||
2015 | return 0; | |
2016 | } | |
2017 | ||
2018 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2019 | { | |
2020 | struct nlattr **attrs = info->attrs; | |
2021 | struct net_device *dev; | |
2022 | struct macsec_secy *secy; | |
2023 | struct macsec_rx_sc *rx_sc; | |
2024 | struct macsec_rx_sa *rx_sa; | |
2025 | u8 assoc_num; | |
2026 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2027 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
2028 | ||
2029 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2030 | return -EINVAL; | |
2031 | ||
2032 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2033 | return -EINVAL; | |
2034 | ||
2035 | if (parse_sa_config(attrs, tb_sa)) | |
2036 | return -EINVAL; | |
2037 | ||
2038 | if (!validate_upd_sa(tb_sa)) | |
2039 | return -EINVAL; | |
2040 | ||
2041 | rtnl_lock(); | |
2042 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2043 | &dev, &secy, &rx_sc, &assoc_num); | |
2044 | if (IS_ERR(rx_sa)) { | |
2045 | rtnl_unlock(); | |
2046 | return PTR_ERR(rx_sa); | |
2047 | } | |
2048 | ||
2049 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2050 | spin_lock_bh(&rx_sa->lock); | |
2051 | rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
2052 | spin_unlock_bh(&rx_sa->lock); | |
2053 | } | |
2054 | ||
2055 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2056 | rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2057 | ||
2058 | rtnl_unlock(); | |
2059 | return 0; | |
2060 | } | |
2061 | ||
2062 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2063 | { | |
2064 | struct nlattr **attrs = info->attrs; | |
2065 | struct net_device *dev; | |
2066 | struct macsec_secy *secy; | |
2067 | struct macsec_rx_sc *rx_sc; | |
2068 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2069 | ||
2070 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2071 | return -EINVAL; | |
2072 | ||
2073 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2074 | return -EINVAL; | |
2075 | ||
2076 | if (!validate_add_rxsc(tb_rxsc)) | |
2077 | return -EINVAL; | |
2078 | ||
2079 | rtnl_lock(); | |
2080 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
2081 | if (IS_ERR(rx_sc)) { | |
2082 | rtnl_unlock(); | |
2083 | return PTR_ERR(rx_sc); | |
2084 | } | |
2085 | ||
2086 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { | |
2087 | bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
2088 | ||
2089 | if (rx_sc->active != new) | |
2090 | secy->n_rx_sc += new ? 1 : -1; | |
2091 | ||
2092 | rx_sc->active = new; | |
2093 | } | |
2094 | ||
2095 | rtnl_unlock(); | |
2096 | ||
2097 | return 0; | |
2098 | } | |
2099 | ||
2100 | static int copy_tx_sa_stats(struct sk_buff *skb, | |
2101 | struct macsec_tx_sa_stats __percpu *pstats) | |
2102 | { | |
2103 | struct macsec_tx_sa_stats sum = {0, }; | |
2104 | int cpu; | |
2105 | ||
2106 | for_each_possible_cpu(cpu) { | |
2107 | const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu); | |
2108 | ||
2109 | sum.OutPktsProtected += stats->OutPktsProtected; | |
2110 | sum.OutPktsEncrypted += stats->OutPktsEncrypted; | |
2111 | } | |
2112 | ||
2113 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) || | |
2114 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted)) | |
2115 | return -EMSGSIZE; | |
2116 | ||
2117 | return 0; | |
2118 | } | |
2119 | ||
2120 | static int copy_rx_sa_stats(struct sk_buff *skb, | |
2121 | struct macsec_rx_sa_stats __percpu *pstats) | |
2122 | { | |
2123 | struct macsec_rx_sa_stats sum = {0, }; | |
2124 | int cpu; | |
2125 | ||
2126 | for_each_possible_cpu(cpu) { | |
2127 | const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu); | |
2128 | ||
2129 | sum.InPktsOK += stats->InPktsOK; | |
2130 | sum.InPktsInvalid += stats->InPktsInvalid; | |
2131 | sum.InPktsNotValid += stats->InPktsNotValid; | |
2132 | sum.InPktsNotUsingSA += stats->InPktsNotUsingSA; | |
2133 | sum.InPktsUnusedSA += stats->InPktsUnusedSA; | |
2134 | } | |
2135 | ||
2136 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) || | |
2137 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) || | |
2138 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) || | |
2139 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) || | |
2140 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA)) | |
2141 | return -EMSGSIZE; | |
2142 | ||
2143 | return 0; | |
2144 | } | |
2145 | ||
2146 | static int copy_rx_sc_stats(struct sk_buff *skb, | |
2147 | struct pcpu_rx_sc_stats __percpu *pstats) | |
2148 | { | |
2149 | struct macsec_rx_sc_stats sum = {0, }; | |
2150 | int cpu; | |
2151 | ||
2152 | for_each_possible_cpu(cpu) { | |
2153 | const struct pcpu_rx_sc_stats *stats; | |
2154 | struct macsec_rx_sc_stats tmp; | |
2155 | unsigned int start; | |
2156 | ||
2157 | stats = per_cpu_ptr(pstats, cpu); | |
2158 | do { | |
2159 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2160 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2161 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2162 | ||
2163 | sum.InOctetsValidated += tmp.InOctetsValidated; | |
2164 | sum.InOctetsDecrypted += tmp.InOctetsDecrypted; | |
2165 | sum.InPktsUnchecked += tmp.InPktsUnchecked; | |
2166 | sum.InPktsDelayed += tmp.InPktsDelayed; | |
2167 | sum.InPktsOK += tmp.InPktsOK; | |
2168 | sum.InPktsInvalid += tmp.InPktsInvalid; | |
2169 | sum.InPktsLate += tmp.InPktsLate; | |
2170 | sum.InPktsNotValid += tmp.InPktsNotValid; | |
2171 | sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA; | |
2172 | sum.InPktsUnusedSA += tmp.InPktsUnusedSA; | |
2173 | } | |
2174 | ||
f60d94c0 ND |
2175 | if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
2176 | sum.InOctetsValidated, | |
2177 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2178 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, | |
2179 | sum.InOctetsDecrypted, | |
2180 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2181 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, | |
2182 | sum.InPktsUnchecked, | |
2183 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2184 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, | |
2185 | sum.InPktsDelayed, | |
2186 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2187 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, | |
2188 | sum.InPktsOK, | |
2189 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2190 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, | |
2191 | sum.InPktsInvalid, | |
2192 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2193 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, | |
2194 | sum.InPktsLate, | |
2195 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2196 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, | |
2197 | sum.InPktsNotValid, | |
2198 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2199 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
2200 | sum.InPktsNotUsingSA, | |
2201 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2202 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
2203 | sum.InPktsUnusedSA, | |
2204 | MACSEC_RXSC_STATS_ATTR_PAD)) | |
c09440f7 SD |
2205 | return -EMSGSIZE; |
2206 | ||
2207 | return 0; | |
2208 | } | |
2209 | ||
2210 | static int copy_tx_sc_stats(struct sk_buff *skb, | |
2211 | struct pcpu_tx_sc_stats __percpu *pstats) | |
2212 | { | |
2213 | struct macsec_tx_sc_stats sum = {0, }; | |
2214 | int cpu; | |
2215 | ||
2216 | for_each_possible_cpu(cpu) { | |
2217 | const struct pcpu_tx_sc_stats *stats; | |
2218 | struct macsec_tx_sc_stats tmp; | |
2219 | unsigned int start; | |
2220 | ||
2221 | stats = per_cpu_ptr(pstats, cpu); | |
2222 | do { | |
2223 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2224 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2225 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2226 | ||
2227 | sum.OutPktsProtected += tmp.OutPktsProtected; | |
2228 | sum.OutPktsEncrypted += tmp.OutPktsEncrypted; | |
2229 | sum.OutOctetsProtected += tmp.OutOctetsProtected; | |
2230 | sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted; | |
2231 | } | |
2232 | ||
f60d94c0 ND |
2233 | if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
2234 | sum.OutPktsProtected, | |
2235 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2236 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
2237 | sum.OutPktsEncrypted, | |
2238 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2239 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, | |
2240 | sum.OutOctetsProtected, | |
2241 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2242 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, | |
2243 | sum.OutOctetsEncrypted, | |
2244 | MACSEC_TXSC_STATS_ATTR_PAD)) | |
c09440f7 SD |
2245 | return -EMSGSIZE; |
2246 | ||
2247 | return 0; | |
2248 | } | |
2249 | ||
2250 | static int copy_secy_stats(struct sk_buff *skb, | |
2251 | struct pcpu_secy_stats __percpu *pstats) | |
2252 | { | |
2253 | struct macsec_dev_stats sum = {0, }; | |
2254 | int cpu; | |
2255 | ||
2256 | for_each_possible_cpu(cpu) { | |
2257 | const struct pcpu_secy_stats *stats; | |
2258 | struct macsec_dev_stats tmp; | |
2259 | unsigned int start; | |
2260 | ||
2261 | stats = per_cpu_ptr(pstats, cpu); | |
2262 | do { | |
2263 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2264 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2265 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2266 | ||
2267 | sum.OutPktsUntagged += tmp.OutPktsUntagged; | |
2268 | sum.InPktsUntagged += tmp.InPktsUntagged; | |
2269 | sum.OutPktsTooLong += tmp.OutPktsTooLong; | |
2270 | sum.InPktsNoTag += tmp.InPktsNoTag; | |
2271 | sum.InPktsBadTag += tmp.InPktsBadTag; | |
2272 | sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI; | |
2273 | sum.InPktsNoSCI += tmp.InPktsNoSCI; | |
2274 | sum.InPktsOverrun += tmp.InPktsOverrun; | |
2275 | } | |
2276 | ||
f60d94c0 ND |
2277 | if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
2278 | sum.OutPktsUntagged, | |
2279 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2280 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, | |
2281 | sum.InPktsUntagged, | |
2282 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2283 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, | |
2284 | sum.OutPktsTooLong, | |
2285 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2286 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, | |
2287 | sum.InPktsNoTag, | |
2288 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2289 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, | |
2290 | sum.InPktsBadTag, | |
2291 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2292 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, | |
2293 | sum.InPktsUnknownSCI, | |
2294 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2295 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, | |
2296 | sum.InPktsNoSCI, | |
2297 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2298 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, | |
2299 | sum.InPktsOverrun, | |
2300 | MACSEC_SECY_STATS_ATTR_PAD)) | |
c09440f7 SD |
2301 | return -EMSGSIZE; |
2302 | ||
2303 | return 0; | |
2304 | } | |
2305 | ||
2306 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) | |
2307 | { | |
2308 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2309 | struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY); | |
2310 | ||
2311 | if (!secy_nest) | |
2312 | return 1; | |
2313 | ||
f60d94c0 ND |
2314 | if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
2315 | MACSEC_SECY_ATTR_PAD) || | |
2316 | nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, | |
c0cc5316 | 2317 | MACSEC_DEFAULT_CIPHER_ID, |
f60d94c0 | 2318 | MACSEC_SECY_ATTR_PAD) || |
c09440f7 SD |
2319 | nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
2320 | nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || | |
2321 | nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || | |
2322 | nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || | |
2323 | nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || | |
2324 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || | |
2325 | nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || | |
2326 | nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || | |
2327 | nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || | |
2328 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) | |
2329 | goto cancel; | |
2330 | ||
2331 | if (secy->replay_protect) { | |
2332 | if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) | |
2333 | goto cancel; | |
2334 | } | |
2335 | ||
2336 | nla_nest_end(skb, secy_nest); | |
2337 | return 0; | |
2338 | ||
2339 | cancel: | |
2340 | nla_nest_cancel(skb, secy_nest); | |
2341 | return 1; | |
2342 | } | |
2343 | ||
2344 | static int dump_secy(struct macsec_secy *secy, struct net_device *dev, | |
2345 | struct sk_buff *skb, struct netlink_callback *cb) | |
2346 | { | |
2347 | struct macsec_rx_sc *rx_sc; | |
2348 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2349 | struct nlattr *txsa_list, *rxsc_list; | |
2350 | int i, j; | |
2351 | void *hdr; | |
2352 | struct nlattr *attr; | |
2353 | ||
2354 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2355 | &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); | |
2356 | if (!hdr) | |
2357 | return -EMSGSIZE; | |
2358 | ||
96cfc505 | 2359 | genl_dump_check_consistent(cb, hdr, &macsec_fam); |
c09440f7 SD |
2360 | |
2361 | if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) | |
2362 | goto nla_put_failure; | |
2363 | ||
2364 | if (nla_put_secy(secy, skb)) | |
2365 | goto nla_put_failure; | |
2366 | ||
2367 | attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS); | |
2368 | if (!attr) | |
2369 | goto nla_put_failure; | |
2370 | if (copy_tx_sc_stats(skb, tx_sc->stats)) { | |
2371 | nla_nest_cancel(skb, attr); | |
2372 | goto nla_put_failure; | |
2373 | } | |
2374 | nla_nest_end(skb, attr); | |
2375 | ||
2376 | attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS); | |
2377 | if (!attr) | |
2378 | goto nla_put_failure; | |
2379 | if (copy_secy_stats(skb, macsec_priv(dev)->stats)) { | |
2380 | nla_nest_cancel(skb, attr); | |
2381 | goto nla_put_failure; | |
2382 | } | |
2383 | nla_nest_end(skb, attr); | |
2384 | ||
2385 | txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST); | |
2386 | if (!txsa_list) | |
2387 | goto nla_put_failure; | |
2388 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { | |
2389 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); | |
2390 | struct nlattr *txsa_nest; | |
2391 | ||
2392 | if (!tx_sa) | |
2393 | continue; | |
2394 | ||
2395 | txsa_nest = nla_nest_start(skb, j++); | |
2396 | if (!txsa_nest) { | |
2397 | nla_nest_cancel(skb, txsa_list); | |
2398 | goto nla_put_failure; | |
2399 | } | |
2400 | ||
2401 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || | |
2402 | nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) || | |
8acca6ac | 2403 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
c09440f7 SD |
2404 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
2405 | nla_nest_cancel(skb, txsa_nest); | |
2406 | nla_nest_cancel(skb, txsa_list); | |
2407 | goto nla_put_failure; | |
2408 | } | |
2409 | ||
2410 | attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS); | |
2411 | if (!attr) { | |
2412 | nla_nest_cancel(skb, txsa_nest); | |
2413 | nla_nest_cancel(skb, txsa_list); | |
2414 | goto nla_put_failure; | |
2415 | } | |
2416 | if (copy_tx_sa_stats(skb, tx_sa->stats)) { | |
2417 | nla_nest_cancel(skb, attr); | |
2418 | nla_nest_cancel(skb, txsa_nest); | |
2419 | nla_nest_cancel(skb, txsa_list); | |
2420 | goto nla_put_failure; | |
2421 | } | |
2422 | nla_nest_end(skb, attr); | |
2423 | ||
2424 | nla_nest_end(skb, txsa_nest); | |
2425 | } | |
2426 | nla_nest_end(skb, txsa_list); | |
2427 | ||
2428 | rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST); | |
2429 | if (!rxsc_list) | |
2430 | goto nla_put_failure; | |
2431 | ||
2432 | j = 1; | |
2433 | for_each_rxsc_rtnl(secy, rx_sc) { | |
2434 | int k; | |
2435 | struct nlattr *rxsa_list; | |
2436 | struct nlattr *rxsc_nest = nla_nest_start(skb, j++); | |
2437 | ||
2438 | if (!rxsc_nest) { | |
2439 | nla_nest_cancel(skb, rxsc_list); | |
2440 | goto nla_put_failure; | |
2441 | } | |
2442 | ||
2443 | if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || | |
f60d94c0 ND |
2444 | nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
2445 | MACSEC_RXSC_ATTR_PAD)) { | |
c09440f7 SD |
2446 | nla_nest_cancel(skb, rxsc_nest); |
2447 | nla_nest_cancel(skb, rxsc_list); | |
2448 | goto nla_put_failure; | |
2449 | } | |
2450 | ||
2451 | attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS); | |
2452 | if (!attr) { | |
2453 | nla_nest_cancel(skb, rxsc_nest); | |
2454 | nla_nest_cancel(skb, rxsc_list); | |
2455 | goto nla_put_failure; | |
2456 | } | |
2457 | if (copy_rx_sc_stats(skb, rx_sc->stats)) { | |
2458 | nla_nest_cancel(skb, attr); | |
2459 | nla_nest_cancel(skb, rxsc_nest); | |
2460 | nla_nest_cancel(skb, rxsc_list); | |
2461 | goto nla_put_failure; | |
2462 | } | |
2463 | nla_nest_end(skb, attr); | |
2464 | ||
2465 | rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST); | |
2466 | if (!rxsa_list) { | |
2467 | nla_nest_cancel(skb, rxsc_nest); | |
2468 | nla_nest_cancel(skb, rxsc_list); | |
2469 | goto nla_put_failure; | |
2470 | } | |
2471 | ||
2472 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { | |
2473 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); | |
2474 | struct nlattr *rxsa_nest; | |
2475 | ||
2476 | if (!rx_sa) | |
2477 | continue; | |
2478 | ||
2479 | rxsa_nest = nla_nest_start(skb, k++); | |
2480 | if (!rxsa_nest) { | |
2481 | nla_nest_cancel(skb, rxsa_list); | |
2482 | nla_nest_cancel(skb, rxsc_nest); | |
2483 | nla_nest_cancel(skb, rxsc_list); | |
2484 | goto nla_put_failure; | |
2485 | } | |
2486 | ||
2487 | attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS); | |
2488 | if (!attr) { | |
2489 | nla_nest_cancel(skb, rxsa_list); | |
2490 | nla_nest_cancel(skb, rxsc_nest); | |
2491 | nla_nest_cancel(skb, rxsc_list); | |
2492 | goto nla_put_failure; | |
2493 | } | |
2494 | if (copy_rx_sa_stats(skb, rx_sa->stats)) { | |
2495 | nla_nest_cancel(skb, attr); | |
2496 | nla_nest_cancel(skb, rxsa_list); | |
2497 | nla_nest_cancel(skb, rxsc_nest); | |
2498 | nla_nest_cancel(skb, rxsc_list); | |
2499 | goto nla_put_failure; | |
2500 | } | |
2501 | nla_nest_end(skb, attr); | |
2502 | ||
2503 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || | |
2504 | nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) || | |
8acca6ac | 2505 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
c09440f7 SD |
2506 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
2507 | nla_nest_cancel(skb, rxsa_nest); | |
2508 | nla_nest_cancel(skb, rxsc_nest); | |
2509 | nla_nest_cancel(skb, rxsc_list); | |
2510 | goto nla_put_failure; | |
2511 | } | |
2512 | nla_nest_end(skb, rxsa_nest); | |
2513 | } | |
2514 | ||
2515 | nla_nest_end(skb, rxsa_list); | |
2516 | nla_nest_end(skb, rxsc_nest); | |
2517 | } | |
2518 | ||
2519 | nla_nest_end(skb, rxsc_list); | |
2520 | ||
c09440f7 SD |
2521 | genlmsg_end(skb, hdr); |
2522 | ||
2523 | return 0; | |
2524 | ||
2525 | nla_put_failure: | |
c09440f7 SD |
2526 | genlmsg_cancel(skb, hdr); |
2527 | return -EMSGSIZE; | |
2528 | } | |
2529 | ||
96cfc505 SD |
2530 | static int macsec_generation = 1; /* protected by RTNL */ |
2531 | ||
c09440f7 SD |
2532 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
2533 | { | |
2534 | struct net *net = sock_net(skb->sk); | |
2535 | struct net_device *dev; | |
2536 | int dev_idx, d; | |
2537 | ||
2538 | dev_idx = cb->args[0]; | |
2539 | ||
2540 | d = 0; | |
c10c63ea | 2541 | rtnl_lock(); |
96cfc505 SD |
2542 | |
2543 | cb->seq = macsec_generation; | |
2544 | ||
c09440f7 SD |
2545 | for_each_netdev(net, dev) { |
2546 | struct macsec_secy *secy; | |
2547 | ||
2548 | if (d < dev_idx) | |
2549 | goto next; | |
2550 | ||
2551 | if (!netif_is_macsec(dev)) | |
2552 | goto next; | |
2553 | ||
2554 | secy = &macsec_priv(dev)->secy; | |
2555 | if (dump_secy(secy, dev, skb, cb) < 0) | |
2556 | goto done; | |
2557 | next: | |
2558 | d++; | |
2559 | } | |
2560 | ||
2561 | done: | |
c10c63ea | 2562 | rtnl_unlock(); |
c09440f7 SD |
2563 | cb->args[0] = d; |
2564 | return skb->len; | |
2565 | } | |
2566 | ||
2567 | static const struct genl_ops macsec_genl_ops[] = { | |
2568 | { | |
2569 | .cmd = MACSEC_CMD_GET_TXSC, | |
2570 | .dumpit = macsec_dump_txsc, | |
2571 | .policy = macsec_genl_policy, | |
2572 | }, | |
2573 | { | |
2574 | .cmd = MACSEC_CMD_ADD_RXSC, | |
2575 | .doit = macsec_add_rxsc, | |
2576 | .policy = macsec_genl_policy, | |
2577 | .flags = GENL_ADMIN_PERM, | |
2578 | }, | |
2579 | { | |
2580 | .cmd = MACSEC_CMD_DEL_RXSC, | |
2581 | .doit = macsec_del_rxsc, | |
2582 | .policy = macsec_genl_policy, | |
2583 | .flags = GENL_ADMIN_PERM, | |
2584 | }, | |
2585 | { | |
2586 | .cmd = MACSEC_CMD_UPD_RXSC, | |
2587 | .doit = macsec_upd_rxsc, | |
2588 | .policy = macsec_genl_policy, | |
2589 | .flags = GENL_ADMIN_PERM, | |
2590 | }, | |
2591 | { | |
2592 | .cmd = MACSEC_CMD_ADD_TXSA, | |
2593 | .doit = macsec_add_txsa, | |
2594 | .policy = macsec_genl_policy, | |
2595 | .flags = GENL_ADMIN_PERM, | |
2596 | }, | |
2597 | { | |
2598 | .cmd = MACSEC_CMD_DEL_TXSA, | |
2599 | .doit = macsec_del_txsa, | |
2600 | .policy = macsec_genl_policy, | |
2601 | .flags = GENL_ADMIN_PERM, | |
2602 | }, | |
2603 | { | |
2604 | .cmd = MACSEC_CMD_UPD_TXSA, | |
2605 | .doit = macsec_upd_txsa, | |
2606 | .policy = macsec_genl_policy, | |
2607 | .flags = GENL_ADMIN_PERM, | |
2608 | }, | |
2609 | { | |
2610 | .cmd = MACSEC_CMD_ADD_RXSA, | |
2611 | .doit = macsec_add_rxsa, | |
2612 | .policy = macsec_genl_policy, | |
2613 | .flags = GENL_ADMIN_PERM, | |
2614 | }, | |
2615 | { | |
2616 | .cmd = MACSEC_CMD_DEL_RXSA, | |
2617 | .doit = macsec_del_rxsa, | |
2618 | .policy = macsec_genl_policy, | |
2619 | .flags = GENL_ADMIN_PERM, | |
2620 | }, | |
2621 | { | |
2622 | .cmd = MACSEC_CMD_UPD_RXSA, | |
2623 | .doit = macsec_upd_rxsa, | |
2624 | .policy = macsec_genl_policy, | |
2625 | .flags = GENL_ADMIN_PERM, | |
2626 | }, | |
2627 | }; | |
2628 | ||
2629 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, | |
2630 | struct net_device *dev) | |
2631 | { | |
2632 | struct macsec_dev *macsec = netdev_priv(dev); | |
2633 | struct macsec_secy *secy = &macsec->secy; | |
2634 | struct pcpu_secy_stats *secy_stats; | |
2635 | int ret, len; | |
2636 | ||
2637 | /* 10.5 */ | |
2638 | if (!secy->protect_frames) { | |
2639 | secy_stats = this_cpu_ptr(macsec->stats); | |
2640 | u64_stats_update_begin(&secy_stats->syncp); | |
2641 | secy_stats->stats.OutPktsUntagged++; | |
2642 | u64_stats_update_end(&secy_stats->syncp); | |
79c62220 | 2643 | skb->dev = macsec->real_dev; |
c09440f7 SD |
2644 | len = skb->len; |
2645 | ret = dev_queue_xmit(skb); | |
2646 | count_tx(dev, ret, len); | |
2647 | return ret; | |
2648 | } | |
2649 | ||
2650 | if (!secy->operational) { | |
2651 | kfree_skb(skb); | |
2652 | dev->stats.tx_dropped++; | |
2653 | return NETDEV_TX_OK; | |
2654 | } | |
2655 | ||
2656 | skb = macsec_encrypt(skb, dev); | |
2657 | if (IS_ERR(skb)) { | |
2658 | if (PTR_ERR(skb) != -EINPROGRESS) | |
2659 | dev->stats.tx_dropped++; | |
2660 | return NETDEV_TX_OK; | |
2661 | } | |
2662 | ||
2663 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
2664 | ||
2665 | macsec_encrypt_finish(skb, dev); | |
2666 | len = skb->len; | |
2667 | ret = dev_queue_xmit(skb); | |
2668 | count_tx(dev, ret, len); | |
2669 | return ret; | |
2670 | } | |
2671 | ||
2672 | #define MACSEC_FEATURES \ | |
2673 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) | |
2674 | static int macsec_dev_init(struct net_device *dev) | |
2675 | { | |
2676 | struct macsec_dev *macsec = macsec_priv(dev); | |
2677 | struct net_device *real_dev = macsec->real_dev; | |
2678 | ||
2679 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
2680 | if (!dev->tstats) | |
2681 | return -ENOMEM; | |
2682 | ||
2683 | dev->features = real_dev->features & MACSEC_FEATURES; | |
2684 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
2685 | ||
2686 | dev->needed_headroom = real_dev->needed_headroom + | |
2687 | MACSEC_NEEDED_HEADROOM; | |
2688 | dev->needed_tailroom = real_dev->needed_tailroom + | |
2689 | MACSEC_NEEDED_TAILROOM; | |
2690 | ||
2691 | if (is_zero_ether_addr(dev->dev_addr)) | |
2692 | eth_hw_addr_inherit(dev, real_dev); | |
2693 | if (is_zero_ether_addr(dev->broadcast)) | |
2694 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
2695 | ||
2696 | return 0; | |
2697 | } | |
2698 | ||
2699 | static void macsec_dev_uninit(struct net_device *dev) | |
2700 | { | |
2701 | free_percpu(dev->tstats); | |
2702 | } | |
2703 | ||
2704 | static netdev_features_t macsec_fix_features(struct net_device *dev, | |
2705 | netdev_features_t features) | |
2706 | { | |
2707 | struct macsec_dev *macsec = macsec_priv(dev); | |
2708 | struct net_device *real_dev = macsec->real_dev; | |
2709 | ||
2710 | features &= real_dev->features & MACSEC_FEATURES; | |
2711 | features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
2712 | ||
2713 | return features; | |
2714 | } | |
2715 | ||
2716 | static int macsec_dev_open(struct net_device *dev) | |
2717 | { | |
2718 | struct macsec_dev *macsec = macsec_priv(dev); | |
2719 | struct net_device *real_dev = macsec->real_dev; | |
2720 | int err; | |
2721 | ||
2722 | if (!(real_dev->flags & IFF_UP)) | |
2723 | return -ENETDOWN; | |
2724 | ||
2725 | err = dev_uc_add(real_dev, dev->dev_addr); | |
2726 | if (err < 0) | |
2727 | return err; | |
2728 | ||
2729 | if (dev->flags & IFF_ALLMULTI) { | |
2730 | err = dev_set_allmulti(real_dev, 1); | |
2731 | if (err < 0) | |
2732 | goto del_unicast; | |
2733 | } | |
2734 | ||
2735 | if (dev->flags & IFF_PROMISC) { | |
2736 | err = dev_set_promiscuity(real_dev, 1); | |
2737 | if (err < 0) | |
2738 | goto clear_allmulti; | |
2739 | } | |
2740 | ||
2741 | if (netif_carrier_ok(real_dev)) | |
2742 | netif_carrier_on(dev); | |
2743 | ||
2744 | return 0; | |
2745 | clear_allmulti: | |
2746 | if (dev->flags & IFF_ALLMULTI) | |
2747 | dev_set_allmulti(real_dev, -1); | |
2748 | del_unicast: | |
2749 | dev_uc_del(real_dev, dev->dev_addr); | |
2750 | netif_carrier_off(dev); | |
2751 | return err; | |
2752 | } | |
2753 | ||
2754 | static int macsec_dev_stop(struct net_device *dev) | |
2755 | { | |
2756 | struct macsec_dev *macsec = macsec_priv(dev); | |
2757 | struct net_device *real_dev = macsec->real_dev; | |
2758 | ||
2759 | netif_carrier_off(dev); | |
2760 | ||
2761 | dev_mc_unsync(real_dev, dev); | |
2762 | dev_uc_unsync(real_dev, dev); | |
2763 | ||
2764 | if (dev->flags & IFF_ALLMULTI) | |
2765 | dev_set_allmulti(real_dev, -1); | |
2766 | ||
2767 | if (dev->flags & IFF_PROMISC) | |
2768 | dev_set_promiscuity(real_dev, -1); | |
2769 | ||
2770 | dev_uc_del(real_dev, dev->dev_addr); | |
2771 | ||
2772 | return 0; | |
2773 | } | |
2774 | ||
2775 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) | |
2776 | { | |
2777 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
2778 | ||
2779 | if (!(dev->flags & IFF_UP)) | |
2780 | return; | |
2781 | ||
2782 | if (change & IFF_ALLMULTI) | |
2783 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
2784 | ||
2785 | if (change & IFF_PROMISC) | |
2786 | dev_set_promiscuity(real_dev, | |
2787 | dev->flags & IFF_PROMISC ? 1 : -1); | |
2788 | } | |
2789 | ||
2790 | static void macsec_dev_set_rx_mode(struct net_device *dev) | |
2791 | { | |
2792 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
2793 | ||
2794 | dev_mc_sync(real_dev, dev); | |
2795 | dev_uc_sync(real_dev, dev); | |
2796 | } | |
2797 | ||
2798 | static int macsec_set_mac_address(struct net_device *dev, void *p) | |
2799 | { | |
2800 | struct macsec_dev *macsec = macsec_priv(dev); | |
2801 | struct net_device *real_dev = macsec->real_dev; | |
2802 | struct sockaddr *addr = p; | |
2803 | int err; | |
2804 | ||
2805 | if (!is_valid_ether_addr(addr->sa_data)) | |
2806 | return -EADDRNOTAVAIL; | |
2807 | ||
2808 | if (!(dev->flags & IFF_UP)) | |
2809 | goto out; | |
2810 | ||
2811 | err = dev_uc_add(real_dev, addr->sa_data); | |
2812 | if (err < 0) | |
2813 | return err; | |
2814 | ||
2815 | dev_uc_del(real_dev, dev->dev_addr); | |
2816 | ||
2817 | out: | |
2818 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
2819 | return 0; | |
2820 | } | |
2821 | ||
2822 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) | |
2823 | { | |
2824 | struct macsec_dev *macsec = macsec_priv(dev); | |
2825 | unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); | |
2826 | ||
2827 | if (macsec->real_dev->mtu - extra < new_mtu) | |
2828 | return -ERANGE; | |
2829 | ||
2830 | dev->mtu = new_mtu; | |
2831 | ||
2832 | return 0; | |
2833 | } | |
2834 | ||
2835 | static struct rtnl_link_stats64 *macsec_get_stats64(struct net_device *dev, | |
2836 | struct rtnl_link_stats64 *s) | |
2837 | { | |
2838 | int cpu; | |
2839 | ||
2840 | if (!dev->tstats) | |
2841 | return s; | |
2842 | ||
2843 | for_each_possible_cpu(cpu) { | |
2844 | struct pcpu_sw_netstats *stats; | |
2845 | struct pcpu_sw_netstats tmp; | |
2846 | int start; | |
2847 | ||
2848 | stats = per_cpu_ptr(dev->tstats, cpu); | |
2849 | do { | |
2850 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2851 | tmp.rx_packets = stats->rx_packets; | |
2852 | tmp.rx_bytes = stats->rx_bytes; | |
2853 | tmp.tx_packets = stats->tx_packets; | |
2854 | tmp.tx_bytes = stats->tx_bytes; | |
2855 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2856 | ||
2857 | s->rx_packets += tmp.rx_packets; | |
2858 | s->rx_bytes += tmp.rx_bytes; | |
2859 | s->tx_packets += tmp.tx_packets; | |
2860 | s->tx_bytes += tmp.tx_bytes; | |
2861 | } | |
2862 | ||
2863 | s->rx_dropped = dev->stats.rx_dropped; | |
2864 | s->tx_dropped = dev->stats.tx_dropped; | |
2865 | ||
2866 | return s; | |
2867 | } | |
2868 | ||
2869 | static int macsec_get_iflink(const struct net_device *dev) | |
2870 | { | |
2871 | return macsec_priv(dev)->real_dev->ifindex; | |
2872 | } | |
2873 | ||
2874 | static const struct net_device_ops macsec_netdev_ops = { | |
2875 | .ndo_init = macsec_dev_init, | |
2876 | .ndo_uninit = macsec_dev_uninit, | |
2877 | .ndo_open = macsec_dev_open, | |
2878 | .ndo_stop = macsec_dev_stop, | |
2879 | .ndo_fix_features = macsec_fix_features, | |
2880 | .ndo_change_mtu = macsec_change_mtu, | |
2881 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, | |
2882 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, | |
2883 | .ndo_set_mac_address = macsec_set_mac_address, | |
2884 | .ndo_start_xmit = macsec_start_xmit, | |
2885 | .ndo_get_stats64 = macsec_get_stats64, | |
2886 | .ndo_get_iflink = macsec_get_iflink, | |
2887 | }; | |
2888 | ||
2889 | static const struct device_type macsec_type = { | |
2890 | .name = "macsec", | |
2891 | }; | |
2892 | ||
2893 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { | |
2894 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, | |
2895 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, | |
2896 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, | |
2897 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, | |
2898 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, | |
2899 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, | |
2900 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, | |
2901 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, | |
2902 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, | |
2903 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, | |
2904 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, | |
2905 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, | |
2906 | }; | |
2907 | ||
2908 | static void macsec_free_netdev(struct net_device *dev) | |
2909 | { | |
2910 | struct macsec_dev *macsec = macsec_priv(dev); | |
2911 | struct net_device *real_dev = macsec->real_dev; | |
2912 | ||
2913 | free_percpu(macsec->stats); | |
2914 | free_percpu(macsec->secy.tx_sc.stats); | |
2915 | ||
2916 | dev_put(real_dev); | |
2917 | free_netdev(dev); | |
2918 | } | |
2919 | ||
2920 | static void macsec_setup(struct net_device *dev) | |
2921 | { | |
2922 | ether_setup(dev); | |
e425974f | 2923 | dev->priv_flags |= IFF_NO_QUEUE; |
c09440f7 SD |
2924 | dev->netdev_ops = &macsec_netdev_ops; |
2925 | dev->destructor = macsec_free_netdev; | |
2926 | ||
2927 | eth_zero_addr(dev->broadcast); | |
2928 | } | |
2929 | ||
2930 | static void macsec_changelink_common(struct net_device *dev, | |
2931 | struct nlattr *data[]) | |
2932 | { | |
2933 | struct macsec_secy *secy; | |
2934 | struct macsec_tx_sc *tx_sc; | |
2935 | ||
2936 | secy = &macsec_priv(dev)->secy; | |
2937 | tx_sc = &secy->tx_sc; | |
2938 | ||
2939 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
2940 | struct macsec_tx_sa *tx_sa; | |
2941 | ||
2942 | tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); | |
2943 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); | |
2944 | ||
2945 | secy->operational = tx_sa && tx_sa->active; | |
2946 | } | |
2947 | ||
2948 | if (data[IFLA_MACSEC_WINDOW]) | |
2949 | secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); | |
2950 | ||
2951 | if (data[IFLA_MACSEC_ENCRYPT]) | |
2952 | tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); | |
2953 | ||
2954 | if (data[IFLA_MACSEC_PROTECT]) | |
2955 | secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); | |
2956 | ||
2957 | if (data[IFLA_MACSEC_INC_SCI]) | |
2958 | tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
2959 | ||
2960 | if (data[IFLA_MACSEC_ES]) | |
2961 | tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); | |
2962 | ||
2963 | if (data[IFLA_MACSEC_SCB]) | |
2964 | tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); | |
2965 | ||
2966 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) | |
2967 | secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); | |
2968 | ||
2969 | if (data[IFLA_MACSEC_VALIDATION]) | |
2970 | secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); | |
2971 | } | |
2972 | ||
2973 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], | |
2974 | struct nlattr *data[]) | |
2975 | { | |
2976 | if (!data) | |
2977 | return 0; | |
2978 | ||
2979 | if (data[IFLA_MACSEC_CIPHER_SUITE] || | |
2980 | data[IFLA_MACSEC_ICV_LEN] || | |
2981 | data[IFLA_MACSEC_SCI] || | |
2982 | data[IFLA_MACSEC_PORT]) | |
2983 | return -EINVAL; | |
2984 | ||
2985 | macsec_changelink_common(dev, data); | |
2986 | ||
2987 | return 0; | |
2988 | } | |
2989 | ||
2990 | static void macsec_del_dev(struct macsec_dev *macsec) | |
2991 | { | |
2992 | int i; | |
2993 | ||
2994 | while (macsec->secy.rx_sc) { | |
2995 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); | |
2996 | ||
2997 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); | |
2998 | free_rx_sc(rx_sc); | |
2999 | } | |
3000 | ||
3001 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
3002 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); | |
3003 | ||
3004 | if (sa) { | |
3005 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); | |
3006 | clear_tx_sa(sa); | |
3007 | } | |
3008 | } | |
3009 | } | |
3010 | ||
3011 | static void macsec_dellink(struct net_device *dev, struct list_head *head) | |
3012 | { | |
3013 | struct macsec_dev *macsec = macsec_priv(dev); | |
3014 | struct net_device *real_dev = macsec->real_dev; | |
3015 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3016 | ||
96cfc505 SD |
3017 | macsec_generation++; |
3018 | ||
c09440f7 SD |
3019 | unregister_netdevice_queue(dev, head); |
3020 | list_del_rcu(&macsec->secys); | |
960d5848 | 3021 | if (list_empty(&rxd->secys)) { |
c09440f7 | 3022 | netdev_rx_handler_unregister(real_dev); |
960d5848 SD |
3023 | kfree(rxd); |
3024 | } | |
c09440f7 SD |
3025 | |
3026 | macsec_del_dev(macsec); | |
3027 | } | |
3028 | ||
3029 | static int register_macsec_dev(struct net_device *real_dev, | |
3030 | struct net_device *dev) | |
3031 | { | |
3032 | struct macsec_dev *macsec = macsec_priv(dev); | |
3033 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3034 | ||
3035 | if (!rxd) { | |
3036 | int err; | |
3037 | ||
3038 | rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); | |
3039 | if (!rxd) | |
3040 | return -ENOMEM; | |
3041 | ||
3042 | INIT_LIST_HEAD(&rxd->secys); | |
3043 | ||
3044 | err = netdev_rx_handler_register(real_dev, macsec_handle_frame, | |
3045 | rxd); | |
960d5848 SD |
3046 | if (err < 0) { |
3047 | kfree(rxd); | |
c09440f7 | 3048 | return err; |
960d5848 | 3049 | } |
c09440f7 SD |
3050 | } |
3051 | ||
3052 | list_add_tail_rcu(&macsec->secys, &rxd->secys); | |
3053 | return 0; | |
3054 | } | |
3055 | ||
3056 | static bool sci_exists(struct net_device *dev, sci_t sci) | |
3057 | { | |
3058 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); | |
3059 | struct macsec_dev *macsec; | |
3060 | ||
3061 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
3062 | if (macsec->secy.sci == sci) | |
3063 | return true; | |
3064 | } | |
3065 | ||
3066 | return false; | |
3067 | } | |
3068 | ||
3069 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) | |
3070 | { | |
3071 | return make_sci(dev->dev_addr, port); | |
3072 | } | |
3073 | ||
3074 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) | |
3075 | { | |
3076 | struct macsec_dev *macsec = macsec_priv(dev); | |
3077 | struct macsec_secy *secy = &macsec->secy; | |
3078 | ||
3079 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); | |
3080 | if (!macsec->stats) | |
3081 | return -ENOMEM; | |
3082 | ||
3083 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); | |
3084 | if (!secy->tx_sc.stats) { | |
3085 | free_percpu(macsec->stats); | |
3086 | return -ENOMEM; | |
3087 | } | |
3088 | ||
3089 | if (sci == MACSEC_UNDEF_SCI) | |
3090 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3091 | ||
3092 | secy->netdev = dev; | |
3093 | secy->operational = true; | |
3094 | secy->key_len = DEFAULT_SAK_LEN; | |
3095 | secy->icv_len = icv_len; | |
3096 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; | |
3097 | secy->protect_frames = true; | |
3098 | secy->replay_protect = false; | |
3099 | ||
3100 | secy->sci = sci; | |
3101 | secy->tx_sc.active = true; | |
3102 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; | |
3103 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; | |
3104 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; | |
3105 | secy->tx_sc.end_station = false; | |
3106 | secy->tx_sc.scb = false; | |
3107 | ||
3108 | return 0; | |
3109 | } | |
3110 | ||
3111 | static int macsec_newlink(struct net *net, struct net_device *dev, | |
3112 | struct nlattr *tb[], struct nlattr *data[]) | |
3113 | { | |
3114 | struct macsec_dev *macsec = macsec_priv(dev); | |
3115 | struct net_device *real_dev; | |
3116 | int err; | |
3117 | sci_t sci; | |
3118 | u8 icv_len = DEFAULT_ICV_LEN; | |
3119 | rx_handler_func_t *rx_handler; | |
3120 | ||
3121 | if (!tb[IFLA_LINK]) | |
3122 | return -EINVAL; | |
3123 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
3124 | if (!real_dev) | |
3125 | return -ENODEV; | |
3126 | ||
3127 | dev->priv_flags |= IFF_MACSEC; | |
3128 | ||
3129 | macsec->real_dev = real_dev; | |
3130 | ||
3131 | if (data && data[IFLA_MACSEC_ICV_LEN]) | |
3132 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
3133 | dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true); | |
3134 | ||
3135 | rx_handler = rtnl_dereference(real_dev->rx_handler); | |
3136 | if (rx_handler && rx_handler != macsec_handle_frame) | |
3137 | return -EBUSY; | |
3138 | ||
3139 | err = register_netdevice(dev); | |
3140 | if (err < 0) | |
3141 | return err; | |
3142 | ||
3143 | /* need to be already registered so that ->init has run and | |
3144 | * the MAC addr is set | |
3145 | */ | |
3146 | if (data && data[IFLA_MACSEC_SCI]) | |
3147 | sci = nla_get_sci(data[IFLA_MACSEC_SCI]); | |
3148 | else if (data && data[IFLA_MACSEC_PORT]) | |
3149 | sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); | |
3150 | else | |
3151 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3152 | ||
3153 | if (rx_handler && sci_exists(real_dev, sci)) { | |
3154 | err = -EBUSY; | |
3155 | goto unregister; | |
3156 | } | |
3157 | ||
3158 | err = macsec_add_dev(dev, sci, icv_len); | |
3159 | if (err) | |
3160 | goto unregister; | |
3161 | ||
3162 | if (data) | |
3163 | macsec_changelink_common(dev, data); | |
3164 | ||
3165 | err = register_macsec_dev(real_dev, dev); | |
3166 | if (err < 0) | |
3167 | goto del_dev; | |
3168 | ||
96cfc505 SD |
3169 | macsec_generation++; |
3170 | ||
c09440f7 SD |
3171 | dev_hold(real_dev); |
3172 | ||
3173 | return 0; | |
3174 | ||
3175 | del_dev: | |
3176 | macsec_del_dev(macsec); | |
3177 | unregister: | |
3178 | unregister_netdevice(dev); | |
3179 | return err; | |
3180 | } | |
3181 | ||
3182 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[]) | |
3183 | { | |
74816480 | 3184 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
c09440f7 SD |
3185 | u8 icv_len = DEFAULT_ICV_LEN; |
3186 | int flag; | |
3187 | bool es, scb, sci; | |
3188 | ||
3189 | if (!data) | |
3190 | return 0; | |
3191 | ||
3192 | if (data[IFLA_MACSEC_CIPHER_SUITE]) | |
3193 | csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); | |
3194 | ||
3195 | if (data[IFLA_MACSEC_ICV_LEN]) | |
3196 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
3197 | ||
3198 | switch (csid) { | |
74816480 SD |
3199 | case MACSEC_DEFAULT_CIPHER_ID: |
3200 | case MACSEC_DEFAULT_CIPHER_ALT: | |
c09440f7 SD |
3201 | if (icv_len < MACSEC_MIN_ICV_LEN || |
3202 | icv_len > MACSEC_MAX_ICV_LEN) | |
3203 | return -EINVAL; | |
3204 | break; | |
3205 | default: | |
3206 | return -EINVAL; | |
3207 | } | |
3208 | ||
3209 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3210 | if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) | |
3211 | return -EINVAL; | |
3212 | } | |
3213 | ||
3214 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; | |
3215 | flag < IFLA_MACSEC_VALIDATION; | |
3216 | flag++) { | |
3217 | if (data[flag]) { | |
3218 | if (nla_get_u8(data[flag]) > 1) | |
3219 | return -EINVAL; | |
3220 | } | |
3221 | } | |
3222 | ||
3223 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; | |
3224 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; | |
3225 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; | |
3226 | ||
3227 | if ((sci && (scb || es)) || (scb && es)) | |
3228 | return -EINVAL; | |
3229 | ||
3230 | if (data[IFLA_MACSEC_VALIDATION] && | |
3231 | nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) | |
3232 | return -EINVAL; | |
3233 | ||
4b1fb935 SD |
3234 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
3235 | nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && | |
c09440f7 SD |
3236 | !data[IFLA_MACSEC_WINDOW]) |
3237 | return -EINVAL; | |
3238 | ||
3239 | return 0; | |
3240 | } | |
3241 | ||
3242 | static struct net *macsec_get_link_net(const struct net_device *dev) | |
3243 | { | |
3244 | return dev_net(macsec_priv(dev)->real_dev); | |
3245 | } | |
3246 | ||
3247 | static size_t macsec_get_size(const struct net_device *dev) | |
3248 | { | |
3249 | return 0 + | |
f60d94c0 | 3250 | nla_total_size_64bit(8) + /* SCI */ |
c09440f7 | 3251 | nla_total_size(1) + /* ICV_LEN */ |
f60d94c0 | 3252 | nla_total_size_64bit(8) + /* CIPHER_SUITE */ |
c09440f7 SD |
3253 | nla_total_size(4) + /* WINDOW */ |
3254 | nla_total_size(1) + /* ENCODING_SA */ | |
3255 | nla_total_size(1) + /* ENCRYPT */ | |
3256 | nla_total_size(1) + /* PROTECT */ | |
3257 | nla_total_size(1) + /* INC_SCI */ | |
3258 | nla_total_size(1) + /* ES */ | |
3259 | nla_total_size(1) + /* SCB */ | |
3260 | nla_total_size(1) + /* REPLAY_PROTECT */ | |
3261 | nla_total_size(1) + /* VALIDATION */ | |
3262 | 0; | |
3263 | } | |
3264 | ||
3265 | static int macsec_fill_info(struct sk_buff *skb, | |
3266 | const struct net_device *dev) | |
3267 | { | |
3268 | struct macsec_secy *secy = &macsec_priv(dev)->secy; | |
3269 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
3270 | ||
f60d94c0 ND |
3271 | if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
3272 | IFLA_MACSEC_PAD) || | |
c09440f7 | 3273 | nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
f60d94c0 | 3274 | nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
c0cc5316 | 3275 | MACSEC_DEFAULT_CIPHER_ID, IFLA_MACSEC_PAD) || |
c09440f7 SD |
3276 | nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
3277 | nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || | |
3278 | nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || | |
3279 | nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || | |
3280 | nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || | |
3281 | nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || | |
3282 | nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || | |
3283 | nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || | |
3284 | 0) | |
3285 | goto nla_put_failure; | |
3286 | ||
3287 | if (secy->replay_protect) { | |
3288 | if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) | |
3289 | goto nla_put_failure; | |
3290 | } | |
3291 | ||
3292 | return 0; | |
3293 | ||
3294 | nla_put_failure: | |
3295 | return -EMSGSIZE; | |
3296 | } | |
3297 | ||
3298 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { | |
3299 | .kind = "macsec", | |
3300 | .priv_size = sizeof(struct macsec_dev), | |
3301 | .maxtype = IFLA_MACSEC_MAX, | |
3302 | .policy = macsec_rtnl_policy, | |
3303 | .setup = macsec_setup, | |
3304 | .validate = macsec_validate_attr, | |
3305 | .newlink = macsec_newlink, | |
3306 | .changelink = macsec_changelink, | |
3307 | .dellink = macsec_dellink, | |
3308 | .get_size = macsec_get_size, | |
3309 | .fill_info = macsec_fill_info, | |
3310 | .get_link_net = macsec_get_link_net, | |
3311 | }; | |
3312 | ||
3313 | static bool is_macsec_master(struct net_device *dev) | |
3314 | { | |
3315 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; | |
3316 | } | |
3317 | ||
3318 | static int macsec_notify(struct notifier_block *this, unsigned long event, | |
3319 | void *ptr) | |
3320 | { | |
3321 | struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); | |
3322 | LIST_HEAD(head); | |
3323 | ||
3324 | if (!is_macsec_master(real_dev)) | |
3325 | return NOTIFY_DONE; | |
3326 | ||
3327 | switch (event) { | |
3328 | case NETDEV_UNREGISTER: { | |
3329 | struct macsec_dev *m, *n; | |
3330 | struct macsec_rxh_data *rxd; | |
3331 | ||
3332 | rxd = macsec_data_rtnl(real_dev); | |
3333 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
3334 | macsec_dellink(m->secy.netdev, &head); | |
3335 | } | |
3336 | unregister_netdevice_many(&head); | |
3337 | break; | |
3338 | } | |
3339 | case NETDEV_CHANGEMTU: { | |
3340 | struct macsec_dev *m; | |
3341 | struct macsec_rxh_data *rxd; | |
3342 | ||
3343 | rxd = macsec_data_rtnl(real_dev); | |
3344 | list_for_each_entry(m, &rxd->secys, secys) { | |
3345 | struct net_device *dev = m->secy.netdev; | |
3346 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + | |
3347 | macsec_extra_len(true)); | |
3348 | ||
3349 | if (dev->mtu > mtu) | |
3350 | dev_set_mtu(dev, mtu); | |
3351 | } | |
3352 | } | |
3353 | } | |
3354 | ||
3355 | return NOTIFY_OK; | |
3356 | } | |
3357 | ||
3358 | static struct notifier_block macsec_notifier = { | |
3359 | .notifier_call = macsec_notify, | |
3360 | }; | |
3361 | ||
3362 | static int __init macsec_init(void) | |
3363 | { | |
3364 | int err; | |
3365 | ||
3366 | pr_info("MACsec IEEE 802.1AE\n"); | |
3367 | err = register_netdevice_notifier(&macsec_notifier); | |
3368 | if (err) | |
3369 | return err; | |
3370 | ||
3371 | err = rtnl_link_register(&macsec_link_ops); | |
3372 | if (err) | |
3373 | goto notifier; | |
3374 | ||
3375 | err = genl_register_family_with_ops(&macsec_fam, macsec_genl_ops); | |
3376 | if (err) | |
3377 | goto rtnl; | |
3378 | ||
3379 | return 0; | |
3380 | ||
3381 | rtnl: | |
3382 | rtnl_link_unregister(&macsec_link_ops); | |
3383 | notifier: | |
3384 | unregister_netdevice_notifier(&macsec_notifier); | |
3385 | return err; | |
3386 | } | |
3387 | ||
3388 | static void __exit macsec_exit(void) | |
3389 | { | |
3390 | genl_unregister_family(&macsec_fam); | |
3391 | rtnl_link_unregister(&macsec_link_ops); | |
3392 | unregister_netdevice_notifier(&macsec_notifier); | |
b196c22a | 3393 | rcu_barrier(); |
c09440f7 SD |
3394 | } |
3395 | ||
3396 | module_init(macsec_init); | |
3397 | module_exit(macsec_exit); | |
3398 | ||
3399 | MODULE_ALIAS_RTNL_LINK("macsec"); | |
3400 | ||
3401 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); | |
3402 | MODULE_LICENSE("GPL v2"); |