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c09440f7 SD |
1 | /* |
2 | * drivers/net/macsec.c - MACsec device | |
3 | * | |
4 | * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/types.h> | |
13 | #include <linux/skbuff.h> | |
14 | #include <linux/socket.h> | |
15 | #include <linux/module.h> | |
16 | #include <crypto/aead.h> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <linux/rtnetlink.h> | |
e187246f | 19 | #include <linux/refcount.h> |
c09440f7 SD |
20 | #include <net/genetlink.h> |
21 | #include <net/sock.h> | |
5491e7c6 | 22 | #include <net/gro_cells.h> |
c09440f7 SD |
23 | |
24 | #include <uapi/linux/if_macsec.h> | |
25 | ||
26 | typedef u64 __bitwise sci_t; | |
27 | ||
28 | #define MACSEC_SCI_LEN 8 | |
29 | ||
30 | /* SecTAG length = macsec_eth_header without the optional SCI */ | |
31 | #define MACSEC_TAG_LEN 6 | |
32 | ||
33 | struct macsec_eth_header { | |
34 | struct ethhdr eth; | |
35 | /* SecTAG */ | |
36 | u8 tci_an; | |
37 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
38 | u8 short_length:6, | |
39 | unused:2; | |
40 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
41 | u8 unused:2, | |
42 | short_length:6; | |
43 | #else | |
44 | #error "Please fix <asm/byteorder.h>" | |
45 | #endif | |
46 | __be32 packet_number; | |
47 | u8 secure_channel_id[8]; /* optional */ | |
48 | } __packed; | |
49 | ||
50 | #define MACSEC_TCI_VERSION 0x80 | |
51 | #define MACSEC_TCI_ES 0x40 /* end station */ | |
52 | #define MACSEC_TCI_SC 0x20 /* SCI present */ | |
53 | #define MACSEC_TCI_SCB 0x10 /* epon */ | |
54 | #define MACSEC_TCI_E 0x08 /* encryption */ | |
55 | #define MACSEC_TCI_C 0x04 /* changed text */ | |
56 | #define MACSEC_AN_MASK 0x03 /* association number */ | |
57 | #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C) | |
58 | ||
59 | /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */ | |
60 | #define MIN_NON_SHORT_LEN 48 | |
61 | ||
62 | #define GCM_AES_IV_LEN 12 | |
63 | #define DEFAULT_ICV_LEN 16 | |
64 | ||
65 | #define MACSEC_NUM_AN 4 /* 2 bits for the association number */ | |
66 | ||
67 | #define for_each_rxsc(secy, sc) \ | |
68 | for (sc = rcu_dereference_bh(secy->rx_sc); \ | |
69 | sc; \ | |
70 | sc = rcu_dereference_bh(sc->next)) | |
71 | #define for_each_rxsc_rtnl(secy, sc) \ | |
72 | for (sc = rtnl_dereference(secy->rx_sc); \ | |
73 | sc; \ | |
74 | sc = rtnl_dereference(sc->next)) | |
75 | ||
76 | struct gcm_iv { | |
77 | union { | |
78 | u8 secure_channel_id[8]; | |
79 | sci_t sci; | |
80 | }; | |
81 | __be32 pn; | |
82 | }; | |
83 | ||
84 | /** | |
85 | * struct macsec_key - SA key | |
86 | * @id: user-provided key identifier | |
87 | * @tfm: crypto struct, key storage | |
88 | */ | |
89 | struct macsec_key { | |
8acca6ac | 90 | u8 id[MACSEC_KEYID_LEN]; |
c09440f7 SD |
91 | struct crypto_aead *tfm; |
92 | }; | |
93 | ||
94 | struct macsec_rx_sc_stats { | |
95 | __u64 InOctetsValidated; | |
96 | __u64 InOctetsDecrypted; | |
97 | __u64 InPktsUnchecked; | |
98 | __u64 InPktsDelayed; | |
99 | __u64 InPktsOK; | |
100 | __u64 InPktsInvalid; | |
101 | __u64 InPktsLate; | |
102 | __u64 InPktsNotValid; | |
103 | __u64 InPktsNotUsingSA; | |
104 | __u64 InPktsUnusedSA; | |
105 | }; | |
106 | ||
107 | struct macsec_rx_sa_stats { | |
108 | __u32 InPktsOK; | |
109 | __u32 InPktsInvalid; | |
110 | __u32 InPktsNotValid; | |
111 | __u32 InPktsNotUsingSA; | |
112 | __u32 InPktsUnusedSA; | |
113 | }; | |
114 | ||
115 | struct macsec_tx_sa_stats { | |
116 | __u32 OutPktsProtected; | |
117 | __u32 OutPktsEncrypted; | |
118 | }; | |
119 | ||
120 | struct macsec_tx_sc_stats { | |
121 | __u64 OutPktsProtected; | |
122 | __u64 OutPktsEncrypted; | |
123 | __u64 OutOctetsProtected; | |
124 | __u64 OutOctetsEncrypted; | |
125 | }; | |
126 | ||
127 | struct macsec_dev_stats { | |
128 | __u64 OutPktsUntagged; | |
129 | __u64 InPktsUntagged; | |
130 | __u64 OutPktsTooLong; | |
131 | __u64 InPktsNoTag; | |
132 | __u64 InPktsBadTag; | |
133 | __u64 InPktsUnknownSCI; | |
134 | __u64 InPktsNoSCI; | |
135 | __u64 InPktsOverrun; | |
136 | }; | |
137 | ||
138 | /** | |
139 | * struct macsec_rx_sa - receive secure association | |
140 | * @active: | |
141 | * @next_pn: packet number expected for the next packet | |
142 | * @lock: protects next_pn manipulations | |
143 | * @key: key structure | |
144 | * @stats: per-SA stats | |
145 | */ | |
146 | struct macsec_rx_sa { | |
147 | struct macsec_key key; | |
148 | spinlock_t lock; | |
149 | u32 next_pn; | |
e187246f | 150 | refcount_t refcnt; |
c09440f7 SD |
151 | bool active; |
152 | struct macsec_rx_sa_stats __percpu *stats; | |
153 | struct macsec_rx_sc *sc; | |
154 | struct rcu_head rcu; | |
155 | }; | |
156 | ||
157 | struct pcpu_rx_sc_stats { | |
158 | struct macsec_rx_sc_stats stats; | |
159 | struct u64_stats_sync syncp; | |
160 | }; | |
161 | ||
162 | /** | |
163 | * struct macsec_rx_sc - receive secure channel | |
164 | * @sci: secure channel identifier for this SC | |
165 | * @active: channel is active | |
166 | * @sa: array of secure associations | |
167 | * @stats: per-SC stats | |
168 | */ | |
169 | struct macsec_rx_sc { | |
170 | struct macsec_rx_sc __rcu *next; | |
171 | sci_t sci; | |
172 | bool active; | |
173 | struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN]; | |
174 | struct pcpu_rx_sc_stats __percpu *stats; | |
8676d76f | 175 | refcount_t refcnt; |
c09440f7 SD |
176 | struct rcu_head rcu_head; |
177 | }; | |
178 | ||
179 | /** | |
180 | * struct macsec_tx_sa - transmit secure association | |
181 | * @active: | |
182 | * @next_pn: packet number to use for the next packet | |
183 | * @lock: protects next_pn manipulations | |
184 | * @key: key structure | |
185 | * @stats: per-SA stats | |
186 | */ | |
187 | struct macsec_tx_sa { | |
188 | struct macsec_key key; | |
189 | spinlock_t lock; | |
190 | u32 next_pn; | |
28206cdb | 191 | refcount_t refcnt; |
c09440f7 SD |
192 | bool active; |
193 | struct macsec_tx_sa_stats __percpu *stats; | |
194 | struct rcu_head rcu; | |
195 | }; | |
196 | ||
197 | struct pcpu_tx_sc_stats { | |
198 | struct macsec_tx_sc_stats stats; | |
199 | struct u64_stats_sync syncp; | |
200 | }; | |
201 | ||
202 | /** | |
203 | * struct macsec_tx_sc - transmit secure channel | |
204 | * @active: | |
205 | * @encoding_sa: association number of the SA currently in use | |
206 | * @encrypt: encrypt packets on transmit, or authenticate only | |
207 | * @send_sci: always include the SCI in the SecTAG | |
208 | * @end_station: | |
209 | * @scb: single copy broadcast flag | |
210 | * @sa: array of secure associations | |
211 | * @stats: stats for this TXSC | |
212 | */ | |
213 | struct macsec_tx_sc { | |
214 | bool active; | |
215 | u8 encoding_sa; | |
216 | bool encrypt; | |
217 | bool send_sci; | |
218 | bool end_station; | |
219 | bool scb; | |
220 | struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN]; | |
221 | struct pcpu_tx_sc_stats __percpu *stats; | |
222 | }; | |
223 | ||
224 | #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT | |
225 | ||
226 | /** | |
227 | * struct macsec_secy - MACsec Security Entity | |
228 | * @netdev: netdevice for this SecY | |
229 | * @n_rx_sc: number of receive secure channels configured on this SecY | |
230 | * @sci: secure channel identifier used for tx | |
231 | * @key_len: length of keys used by the cipher suite | |
232 | * @icv_len: length of ICV used by the cipher suite | |
233 | * @validate_frames: validation mode | |
234 | * @operational: MAC_Operational flag | |
235 | * @protect_frames: enable protection for this SecY | |
236 | * @replay_protect: enable packet number checks on receive | |
237 | * @replay_window: size of the replay window | |
238 | * @tx_sc: transmit secure channel | |
239 | * @rx_sc: linked list of receive secure channels | |
240 | */ | |
241 | struct macsec_secy { | |
242 | struct net_device *netdev; | |
243 | unsigned int n_rx_sc; | |
244 | sci_t sci; | |
245 | u16 key_len; | |
246 | u16 icv_len; | |
247 | enum macsec_validation_type validate_frames; | |
248 | bool operational; | |
249 | bool protect_frames; | |
250 | bool replay_protect; | |
251 | u32 replay_window; | |
252 | struct macsec_tx_sc tx_sc; | |
253 | struct macsec_rx_sc __rcu *rx_sc; | |
254 | }; | |
255 | ||
256 | struct pcpu_secy_stats { | |
257 | struct macsec_dev_stats stats; | |
258 | struct u64_stats_sync syncp; | |
259 | }; | |
260 | ||
261 | /** | |
262 | * struct macsec_dev - private data | |
263 | * @secy: SecY config | |
264 | * @real_dev: pointer to underlying netdevice | |
265 | * @stats: MACsec device stats | |
266 | * @secys: linked list of SecY's on the underlying device | |
267 | */ | |
268 | struct macsec_dev { | |
269 | struct macsec_secy secy; | |
270 | struct net_device *real_dev; | |
271 | struct pcpu_secy_stats __percpu *stats; | |
272 | struct list_head secys; | |
5491e7c6 | 273 | struct gro_cells gro_cells; |
e2003872 | 274 | unsigned int nest_level; |
c09440f7 SD |
275 | }; |
276 | ||
277 | /** | |
278 | * struct macsec_rxh_data - rx_handler private argument | |
279 | * @secys: linked list of SecY's on this underlying device | |
280 | */ | |
281 | struct macsec_rxh_data { | |
282 | struct list_head secys; | |
283 | }; | |
284 | ||
285 | static struct macsec_dev *macsec_priv(const struct net_device *dev) | |
286 | { | |
287 | return (struct macsec_dev *)netdev_priv(dev); | |
288 | } | |
289 | ||
290 | static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) | |
291 | { | |
292 | return rcu_dereference_bh(dev->rx_handler_data); | |
293 | } | |
294 | ||
295 | static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) | |
296 | { | |
297 | return rtnl_dereference(dev->rx_handler_data); | |
298 | } | |
299 | ||
300 | struct macsec_cb { | |
301 | struct aead_request *req; | |
302 | union { | |
303 | struct macsec_tx_sa *tx_sa; | |
304 | struct macsec_rx_sa *rx_sa; | |
305 | }; | |
306 | u8 assoc_num; | |
307 | bool valid; | |
308 | bool has_sci; | |
309 | }; | |
310 | ||
311 | static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) | |
312 | { | |
313 | struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); | |
314 | ||
315 | if (!sa || !sa->active) | |
316 | return NULL; | |
317 | ||
e187246f | 318 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
319 | return NULL; |
320 | ||
321 | return sa; | |
322 | } | |
323 | ||
324 | static void free_rx_sc_rcu(struct rcu_head *head) | |
325 | { | |
326 | struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); | |
327 | ||
328 | free_percpu(rx_sc->stats); | |
329 | kfree(rx_sc); | |
330 | } | |
331 | ||
332 | static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) | |
333 | { | |
8676d76f | 334 | return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL; |
c09440f7 SD |
335 | } |
336 | ||
337 | static void macsec_rxsc_put(struct macsec_rx_sc *sc) | |
338 | { | |
8676d76f | 339 | if (refcount_dec_and_test(&sc->refcnt)) |
c09440f7 SD |
340 | call_rcu(&sc->rcu_head, free_rx_sc_rcu); |
341 | } | |
342 | ||
343 | static void free_rxsa(struct rcu_head *head) | |
344 | { | |
345 | struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); | |
346 | ||
347 | crypto_free_aead(sa->key.tfm); | |
348 | free_percpu(sa->stats); | |
c09440f7 SD |
349 | kfree(sa); |
350 | } | |
351 | ||
352 | static void macsec_rxsa_put(struct macsec_rx_sa *sa) | |
353 | { | |
e187246f | 354 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
355 | call_rcu(&sa->rcu, free_rxsa); |
356 | } | |
357 | ||
358 | static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) | |
359 | { | |
360 | struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); | |
361 | ||
362 | if (!sa || !sa->active) | |
363 | return NULL; | |
364 | ||
28206cdb | 365 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
366 | return NULL; |
367 | ||
368 | return sa; | |
369 | } | |
370 | ||
371 | static void free_txsa(struct rcu_head *head) | |
372 | { | |
373 | struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); | |
374 | ||
375 | crypto_free_aead(sa->key.tfm); | |
376 | free_percpu(sa->stats); | |
377 | kfree(sa); | |
378 | } | |
379 | ||
380 | static void macsec_txsa_put(struct macsec_tx_sa *sa) | |
381 | { | |
28206cdb | 382 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
383 | call_rcu(&sa->rcu, free_txsa); |
384 | } | |
385 | ||
386 | static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) | |
387 | { | |
388 | BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); | |
389 | return (struct macsec_cb *)skb->cb; | |
390 | } | |
391 | ||
392 | #define MACSEC_PORT_ES (htons(0x0001)) | |
393 | #define MACSEC_PORT_SCB (0x0000) | |
394 | #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) | |
395 | ||
ccfdec90 FW |
396 | #define MACSEC_GCM_AES_128_SAK_LEN 16 |
397 | #define MACSEC_GCM_AES_256_SAK_LEN 32 | |
398 | ||
ccfdec90 | 399 | #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN |
c09440f7 SD |
400 | #define DEFAULT_SEND_SCI true |
401 | #define DEFAULT_ENCRYPT false | |
402 | #define DEFAULT_ENCODING_SA 0 | |
403 | ||
e0f841f5 TB |
404 | static bool send_sci(const struct macsec_secy *secy) |
405 | { | |
406 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
407 | ||
408 | return tx_sc->send_sci || | |
409 | (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb); | |
410 | } | |
411 | ||
c09440f7 SD |
412 | static sci_t make_sci(u8 *addr, __be16 port) |
413 | { | |
414 | sci_t sci; | |
415 | ||
416 | memcpy(&sci, addr, ETH_ALEN); | |
417 | memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port)); | |
418 | ||
419 | return sci; | |
420 | } | |
421 | ||
422 | static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present) | |
423 | { | |
424 | sci_t sci; | |
425 | ||
426 | if (sci_present) | |
427 | memcpy(&sci, hdr->secure_channel_id, | |
428 | sizeof(hdr->secure_channel_id)); | |
429 | else | |
430 | sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES); | |
431 | ||
432 | return sci; | |
433 | } | |
434 | ||
435 | static unsigned int macsec_sectag_len(bool sci_present) | |
436 | { | |
437 | return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0); | |
438 | } | |
439 | ||
440 | static unsigned int macsec_hdr_len(bool sci_present) | |
441 | { | |
442 | return macsec_sectag_len(sci_present) + ETH_HLEN; | |
443 | } | |
444 | ||
445 | static unsigned int macsec_extra_len(bool sci_present) | |
446 | { | |
447 | return macsec_sectag_len(sci_present) + sizeof(__be16); | |
448 | } | |
449 | ||
450 | /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */ | |
451 | static void macsec_fill_sectag(struct macsec_eth_header *h, | |
e0f841f5 TB |
452 | const struct macsec_secy *secy, u32 pn, |
453 | bool sci_present) | |
c09440f7 SD |
454 | { |
455 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
456 | ||
e0f841f5 | 457 | memset(&h->tci_an, 0, macsec_sectag_len(sci_present)); |
c09440f7 SD |
458 | h->eth.h_proto = htons(ETH_P_MACSEC); |
459 | ||
e0f841f5 | 460 | if (sci_present) { |
c09440f7 SD |
461 | h->tci_an |= MACSEC_TCI_SC; |
462 | memcpy(&h->secure_channel_id, &secy->sci, | |
463 | sizeof(h->secure_channel_id)); | |
464 | } else { | |
465 | if (tx_sc->end_station) | |
466 | h->tci_an |= MACSEC_TCI_ES; | |
467 | if (tx_sc->scb) | |
468 | h->tci_an |= MACSEC_TCI_SCB; | |
469 | } | |
470 | ||
471 | h->packet_number = htonl(pn); | |
472 | ||
473 | /* with GCM, C/E clear for !encrypt, both set for encrypt */ | |
474 | if (tx_sc->encrypt) | |
475 | h->tci_an |= MACSEC_TCI_CONFID; | |
476 | else if (secy->icv_len != DEFAULT_ICV_LEN) | |
477 | h->tci_an |= MACSEC_TCI_C; | |
478 | ||
479 | h->tci_an |= tx_sc->encoding_sa; | |
480 | } | |
481 | ||
482 | static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len) | |
483 | { | |
484 | if (data_len < MIN_NON_SHORT_LEN) | |
485 | h->short_length = data_len; | |
486 | } | |
487 | ||
488 | /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */ | |
489 | static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len) | |
490 | { | |
491 | struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data; | |
492 | int len = skb->len - 2 * ETH_ALEN; | |
493 | int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len; | |
494 | ||
495 | /* a) It comprises at least 17 octets */ | |
496 | if (skb->len <= 16) | |
497 | return false; | |
498 | ||
499 | /* b) MACsec EtherType: already checked */ | |
500 | ||
501 | /* c) V bit is clear */ | |
502 | if (h->tci_an & MACSEC_TCI_VERSION) | |
503 | return false; | |
504 | ||
505 | /* d) ES or SCB => !SC */ | |
506 | if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) && | |
507 | (h->tci_an & MACSEC_TCI_SC)) | |
508 | return false; | |
509 | ||
510 | /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */ | |
511 | if (h->unused) | |
512 | return false; | |
513 | ||
514 | /* rx.pn != 0 (figure 10-5) */ | |
515 | if (!h->packet_number) | |
516 | return false; | |
517 | ||
518 | /* length check, f) g) h) i) */ | |
519 | if (h->short_length) | |
520 | return len == extra_len + h->short_length; | |
521 | return len >= extra_len + MIN_NON_SHORT_LEN; | |
522 | } | |
523 | ||
524 | #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true)) | |
2ccbe2cb | 525 | #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN |
c09440f7 SD |
526 | |
527 | static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn) | |
528 | { | |
529 | struct gcm_iv *gcm_iv = (struct gcm_iv *)iv; | |
530 | ||
531 | gcm_iv->sci = sci; | |
532 | gcm_iv->pn = htonl(pn); | |
533 | } | |
534 | ||
535 | static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) | |
536 | { | |
537 | return (struct macsec_eth_header *)skb_mac_header(skb); | |
538 | } | |
539 | ||
540 | static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy) | |
541 | { | |
542 | u32 pn; | |
543 | ||
544 | spin_lock_bh(&tx_sa->lock); | |
545 | pn = tx_sa->next_pn; | |
546 | ||
547 | tx_sa->next_pn++; | |
548 | if (tx_sa->next_pn == 0) { | |
549 | pr_debug("PN wrapped, transitioning to !oper\n"); | |
550 | tx_sa->active = false; | |
551 | if (secy->protect_frames) | |
552 | secy->operational = false; | |
553 | } | |
554 | spin_unlock_bh(&tx_sa->lock); | |
555 | ||
556 | return pn; | |
557 | } | |
558 | ||
559 | static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) | |
560 | { | |
561 | struct macsec_dev *macsec = netdev_priv(dev); | |
562 | ||
563 | skb->dev = macsec->real_dev; | |
564 | skb_reset_mac_header(skb); | |
565 | skb->protocol = eth_hdr(skb)->h_proto; | |
566 | } | |
567 | ||
568 | static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, | |
569 | struct macsec_tx_sa *tx_sa) | |
570 | { | |
571 | struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); | |
572 | ||
573 | u64_stats_update_begin(&txsc_stats->syncp); | |
574 | if (tx_sc->encrypt) { | |
575 | txsc_stats->stats.OutOctetsEncrypted += skb->len; | |
576 | txsc_stats->stats.OutPktsEncrypted++; | |
577 | this_cpu_inc(tx_sa->stats->OutPktsEncrypted); | |
578 | } else { | |
579 | txsc_stats->stats.OutOctetsProtected += skb->len; | |
580 | txsc_stats->stats.OutPktsProtected++; | |
581 | this_cpu_inc(tx_sa->stats->OutPktsProtected); | |
582 | } | |
583 | u64_stats_update_end(&txsc_stats->syncp); | |
584 | } | |
585 | ||
586 | static void count_tx(struct net_device *dev, int ret, int len) | |
587 | { | |
588 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
589 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
590 | ||
591 | u64_stats_update_begin(&stats->syncp); | |
592 | stats->tx_packets++; | |
593 | stats->tx_bytes += len; | |
594 | u64_stats_update_end(&stats->syncp); | |
c09440f7 SD |
595 | } |
596 | } | |
597 | ||
598 | static void macsec_encrypt_done(struct crypto_async_request *base, int err) | |
599 | { | |
600 | struct sk_buff *skb = base->data; | |
601 | struct net_device *dev = skb->dev; | |
602 | struct macsec_dev *macsec = macsec_priv(dev); | |
603 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; | |
604 | int len, ret; | |
605 | ||
606 | aead_request_free(macsec_skb_cb(skb)->req); | |
607 | ||
608 | rcu_read_lock_bh(); | |
609 | macsec_encrypt_finish(skb, dev); | |
610 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
611 | len = skb->len; | |
612 | ret = dev_queue_xmit(skb); | |
613 | count_tx(dev, ret, len); | |
614 | rcu_read_unlock_bh(); | |
615 | ||
616 | macsec_txsa_put(sa); | |
617 | dev_put(dev); | |
618 | } | |
619 | ||
5d9649b3 SD |
620 | static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
621 | unsigned char **iv, | |
5294b830 JD |
622 | struct scatterlist **sg, |
623 | int num_frags) | |
5d9649b3 SD |
624 | { |
625 | size_t size, iv_offset, sg_offset; | |
626 | struct aead_request *req; | |
627 | void *tmp; | |
628 | ||
629 | size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); | |
630 | iv_offset = size; | |
631 | size += GCM_AES_IV_LEN; | |
632 | ||
633 | size = ALIGN(size, __alignof__(struct scatterlist)); | |
634 | sg_offset = size; | |
5294b830 | 635 | size += sizeof(struct scatterlist) * num_frags; |
5d9649b3 SD |
636 | |
637 | tmp = kmalloc(size, GFP_ATOMIC); | |
638 | if (!tmp) | |
639 | return NULL; | |
640 | ||
641 | *iv = (unsigned char *)(tmp + iv_offset); | |
642 | *sg = (struct scatterlist *)(tmp + sg_offset); | |
643 | req = tmp; | |
644 | ||
645 | aead_request_set_tfm(req, tfm); | |
646 | ||
647 | return req; | |
648 | } | |
649 | ||
c09440f7 SD |
650 | static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
651 | struct net_device *dev) | |
652 | { | |
653 | int ret; | |
5d9649b3 | 654 | struct scatterlist *sg; |
5294b830 | 655 | struct sk_buff *trailer; |
5d9649b3 | 656 | unsigned char *iv; |
c09440f7 SD |
657 | struct ethhdr *eth; |
658 | struct macsec_eth_header *hh; | |
659 | size_t unprotected_len; | |
660 | struct aead_request *req; | |
661 | struct macsec_secy *secy; | |
662 | struct macsec_tx_sc *tx_sc; | |
663 | struct macsec_tx_sa *tx_sa; | |
664 | struct macsec_dev *macsec = macsec_priv(dev); | |
e0f841f5 | 665 | bool sci_present; |
c09440f7 SD |
666 | u32 pn; |
667 | ||
668 | secy = &macsec->secy; | |
669 | tx_sc = &secy->tx_sc; | |
670 | ||
671 | /* 10.5.1 TX SA assignment */ | |
672 | tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]); | |
673 | if (!tx_sa) { | |
674 | secy->operational = false; | |
675 | kfree_skb(skb); | |
676 | return ERR_PTR(-EINVAL); | |
677 | } | |
678 | ||
679 | if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || | |
680 | skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { | |
681 | struct sk_buff *nskb = skb_copy_expand(skb, | |
682 | MACSEC_NEEDED_HEADROOM, | |
683 | MACSEC_NEEDED_TAILROOM, | |
684 | GFP_ATOMIC); | |
685 | if (likely(nskb)) { | |
686 | consume_skb(skb); | |
687 | skb = nskb; | |
688 | } else { | |
689 | macsec_txsa_put(tx_sa); | |
690 | kfree_skb(skb); | |
691 | return ERR_PTR(-ENOMEM); | |
692 | } | |
693 | } else { | |
694 | skb = skb_unshare(skb, GFP_ATOMIC); | |
695 | if (!skb) { | |
696 | macsec_txsa_put(tx_sa); | |
697 | return ERR_PTR(-ENOMEM); | |
698 | } | |
699 | } | |
700 | ||
701 | unprotected_len = skb->len; | |
702 | eth = eth_hdr(skb); | |
e0f841f5 | 703 | sci_present = send_sci(secy); |
d58ff351 | 704 | hh = skb_push(skb, macsec_extra_len(sci_present)); |
c09440f7 SD |
705 | memmove(hh, eth, 2 * ETH_ALEN); |
706 | ||
707 | pn = tx_sa_update_pn(tx_sa, secy); | |
708 | if (pn == 0) { | |
709 | macsec_txsa_put(tx_sa); | |
710 | kfree_skb(skb); | |
711 | return ERR_PTR(-ENOLINK); | |
712 | } | |
e0f841f5 | 713 | macsec_fill_sectag(hh, secy, pn, sci_present); |
c09440f7 SD |
714 | macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN); |
715 | ||
c09440f7 SD |
716 | skb_put(skb, secy->icv_len); |
717 | ||
718 | if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { | |
719 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
720 | ||
721 | u64_stats_update_begin(&secy_stats->syncp); | |
722 | secy_stats->stats.OutPktsTooLong++; | |
723 | u64_stats_update_end(&secy_stats->syncp); | |
724 | ||
725 | macsec_txsa_put(tx_sa); | |
726 | kfree_skb(skb); | |
727 | return ERR_PTR(-EINVAL); | |
728 | } | |
729 | ||
5294b830 JD |
730 | ret = skb_cow_data(skb, 0, &trailer); |
731 | if (unlikely(ret < 0)) { | |
732 | macsec_txsa_put(tx_sa); | |
733 | kfree_skb(skb); | |
734 | return ERR_PTR(ret); | |
735 | } | |
736 | ||
737 | req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
738 | if (!req) { |
739 | macsec_txsa_put(tx_sa); | |
740 | kfree_skb(skb); | |
741 | return ERR_PTR(-ENOMEM); | |
742 | } | |
743 | ||
5d9649b3 SD |
744 | macsec_fill_iv(iv, secy->sci, pn); |
745 | ||
5294b830 | 746 | sg_init_table(sg, ret); |
cda7ea69 JD |
747 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
748 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 749 | aead_request_free(req); |
cda7ea69 JD |
750 | macsec_txsa_put(tx_sa); |
751 | kfree_skb(skb); | |
752 | return ERR_PTR(ret); | |
753 | } | |
c09440f7 SD |
754 | |
755 | if (tx_sc->encrypt) { | |
e0f841f5 | 756 | int len = skb->len - macsec_hdr_len(sci_present) - |
c09440f7 SD |
757 | secy->icv_len; |
758 | aead_request_set_crypt(req, sg, sg, len, iv); | |
e0f841f5 | 759 | aead_request_set_ad(req, macsec_hdr_len(sci_present)); |
c09440f7 SD |
760 | } else { |
761 | aead_request_set_crypt(req, sg, sg, 0, iv); | |
762 | aead_request_set_ad(req, skb->len - secy->icv_len); | |
763 | } | |
764 | ||
765 | macsec_skb_cb(skb)->req = req; | |
766 | macsec_skb_cb(skb)->tx_sa = tx_sa; | |
767 | aead_request_set_callback(req, 0, macsec_encrypt_done, skb); | |
768 | ||
769 | dev_hold(skb->dev); | |
770 | ret = crypto_aead_encrypt(req); | |
771 | if (ret == -EINPROGRESS) { | |
772 | return ERR_PTR(ret); | |
773 | } else if (ret != 0) { | |
774 | dev_put(skb->dev); | |
775 | kfree_skb(skb); | |
776 | aead_request_free(req); | |
777 | macsec_txsa_put(tx_sa); | |
778 | return ERR_PTR(-EINVAL); | |
779 | } | |
780 | ||
781 | dev_put(skb->dev); | |
782 | aead_request_free(req); | |
783 | macsec_txsa_put(tx_sa); | |
784 | ||
785 | return skb; | |
786 | } | |
787 | ||
788 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) | |
789 | { | |
790 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
791 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); | |
792 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); | |
793 | u32 lowest_pn = 0; | |
794 | ||
795 | spin_lock(&rx_sa->lock); | |
796 | if (rx_sa->next_pn >= secy->replay_window) | |
797 | lowest_pn = rx_sa->next_pn - secy->replay_window; | |
798 | ||
799 | /* Now perform replay protection check again | |
800 | * (see IEEE 802.1AE-2006 figure 10-5) | |
801 | */ | |
802 | if (secy->replay_protect && pn < lowest_pn) { | |
803 | spin_unlock(&rx_sa->lock); | |
804 | u64_stats_update_begin(&rxsc_stats->syncp); | |
805 | rxsc_stats->stats.InPktsLate++; | |
806 | u64_stats_update_end(&rxsc_stats->syncp); | |
807 | return false; | |
808 | } | |
809 | ||
810 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { | |
811 | u64_stats_update_begin(&rxsc_stats->syncp); | |
812 | if (hdr->tci_an & MACSEC_TCI_E) | |
813 | rxsc_stats->stats.InOctetsDecrypted += skb->len; | |
814 | else | |
815 | rxsc_stats->stats.InOctetsValidated += skb->len; | |
816 | u64_stats_update_end(&rxsc_stats->syncp); | |
817 | } | |
818 | ||
819 | if (!macsec_skb_cb(skb)->valid) { | |
820 | spin_unlock(&rx_sa->lock); | |
821 | ||
822 | /* 10.6.5 */ | |
823 | if (hdr->tci_an & MACSEC_TCI_C || | |
824 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
825 | u64_stats_update_begin(&rxsc_stats->syncp); | |
826 | rxsc_stats->stats.InPktsNotValid++; | |
827 | u64_stats_update_end(&rxsc_stats->syncp); | |
828 | return false; | |
829 | } | |
830 | ||
831 | u64_stats_update_begin(&rxsc_stats->syncp); | |
832 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { | |
833 | rxsc_stats->stats.InPktsInvalid++; | |
834 | this_cpu_inc(rx_sa->stats->InPktsInvalid); | |
835 | } else if (pn < lowest_pn) { | |
836 | rxsc_stats->stats.InPktsDelayed++; | |
837 | } else { | |
838 | rxsc_stats->stats.InPktsUnchecked++; | |
839 | } | |
840 | u64_stats_update_end(&rxsc_stats->syncp); | |
841 | } else { | |
842 | u64_stats_update_begin(&rxsc_stats->syncp); | |
843 | if (pn < lowest_pn) { | |
844 | rxsc_stats->stats.InPktsDelayed++; | |
845 | } else { | |
846 | rxsc_stats->stats.InPktsOK++; | |
847 | this_cpu_inc(rx_sa->stats->InPktsOK); | |
848 | } | |
849 | u64_stats_update_end(&rxsc_stats->syncp); | |
850 | ||
851 | if (pn >= rx_sa->next_pn) | |
852 | rx_sa->next_pn = pn + 1; | |
853 | spin_unlock(&rx_sa->lock); | |
854 | } | |
855 | ||
856 | return true; | |
857 | } | |
858 | ||
859 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) | |
860 | { | |
861 | skb->pkt_type = PACKET_HOST; | |
862 | skb->protocol = eth_type_trans(skb, dev); | |
863 | ||
864 | skb_reset_network_header(skb); | |
865 | if (!skb_transport_header_was_set(skb)) | |
866 | skb_reset_transport_header(skb); | |
867 | skb_reset_mac_len(skb); | |
868 | } | |
869 | ||
870 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) | |
871 | { | |
872 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); | |
873 | skb_pull(skb, hdr_len); | |
874 | pskb_trim_unique(skb, skb->len - icv_len); | |
875 | } | |
876 | ||
877 | static void count_rx(struct net_device *dev, int len) | |
878 | { | |
879 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
880 | ||
881 | u64_stats_update_begin(&stats->syncp); | |
882 | stats->rx_packets++; | |
883 | stats->rx_bytes += len; | |
884 | u64_stats_update_end(&stats->syncp); | |
885 | } | |
886 | ||
887 | static void macsec_decrypt_done(struct crypto_async_request *base, int err) | |
888 | { | |
889 | struct sk_buff *skb = base->data; | |
890 | struct net_device *dev = skb->dev; | |
891 | struct macsec_dev *macsec = macsec_priv(dev); | |
892 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
c78ebe1d | 893 | struct macsec_rx_sc *rx_sc = rx_sa->sc; |
863483c9 | 894 | int len; |
c09440f7 SD |
895 | u32 pn; |
896 | ||
897 | aead_request_free(macsec_skb_cb(skb)->req); | |
898 | ||
b3bdc3ac LR |
899 | if (!err) |
900 | macsec_skb_cb(skb)->valid = true; | |
901 | ||
c09440f7 SD |
902 | rcu_read_lock_bh(); |
903 | pn = ntohl(macsec_ethhdr(skb)->packet_number); | |
904 | if (!macsec_post_decrypt(skb, &macsec->secy, pn)) { | |
905 | rcu_read_unlock_bh(); | |
906 | kfree_skb(skb); | |
907 | goto out; | |
908 | } | |
909 | ||
910 | macsec_finalize_skb(skb, macsec->secy.icv_len, | |
911 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
912 | macsec_reset_skb(skb, macsec->secy.netdev); | |
913 | ||
914 | len = skb->len; | |
863483c9 | 915 | if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS) |
c09440f7 | 916 | count_rx(dev, len); |
c09440f7 SD |
917 | |
918 | rcu_read_unlock_bh(); | |
919 | ||
920 | out: | |
921 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 922 | macsec_rxsc_put(rx_sc); |
c09440f7 | 923 | dev_put(dev); |
c09440f7 SD |
924 | } |
925 | ||
926 | static struct sk_buff *macsec_decrypt(struct sk_buff *skb, | |
927 | struct net_device *dev, | |
928 | struct macsec_rx_sa *rx_sa, | |
929 | sci_t sci, | |
930 | struct macsec_secy *secy) | |
931 | { | |
932 | int ret; | |
5d9649b3 | 933 | struct scatterlist *sg; |
5294b830 | 934 | struct sk_buff *trailer; |
5d9649b3 | 935 | unsigned char *iv; |
c09440f7 SD |
936 | struct aead_request *req; |
937 | struct macsec_eth_header *hdr; | |
938 | u16 icv_len = secy->icv_len; | |
939 | ||
940 | macsec_skb_cb(skb)->valid = false; | |
941 | skb = skb_share_check(skb, GFP_ATOMIC); | |
942 | if (!skb) | |
c3b7d0bd | 943 | return ERR_PTR(-ENOMEM); |
c09440f7 | 944 | |
5294b830 JD |
945 | ret = skb_cow_data(skb, 0, &trailer); |
946 | if (unlikely(ret < 0)) { | |
947 | kfree_skb(skb); | |
948 | return ERR_PTR(ret); | |
949 | } | |
950 | req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
951 | if (!req) { |
952 | kfree_skb(skb); | |
c3b7d0bd | 953 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
954 | } |
955 | ||
956 | hdr = (struct macsec_eth_header *)skb->data; | |
957 | macsec_fill_iv(iv, sci, ntohl(hdr->packet_number)); | |
958 | ||
5294b830 | 959 | sg_init_table(sg, ret); |
cda7ea69 JD |
960 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
961 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 962 | aead_request_free(req); |
cda7ea69 JD |
963 | kfree_skb(skb); |
964 | return ERR_PTR(ret); | |
965 | } | |
c09440f7 SD |
966 | |
967 | if (hdr->tci_an & MACSEC_TCI_E) { | |
968 | /* confidentiality: ethernet + macsec header | |
969 | * authenticated, encrypted payload | |
970 | */ | |
971 | int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci); | |
972 | ||
973 | aead_request_set_crypt(req, sg, sg, len, iv); | |
974 | aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci)); | |
975 | skb = skb_unshare(skb, GFP_ATOMIC); | |
976 | if (!skb) { | |
977 | aead_request_free(req); | |
c3b7d0bd | 978 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
979 | } |
980 | } else { | |
981 | /* integrity only: all headers + data authenticated */ | |
982 | aead_request_set_crypt(req, sg, sg, icv_len, iv); | |
983 | aead_request_set_ad(req, skb->len - icv_len); | |
984 | } | |
985 | ||
986 | macsec_skb_cb(skb)->req = req; | |
c09440f7 SD |
987 | skb->dev = dev; |
988 | aead_request_set_callback(req, 0, macsec_decrypt_done, skb); | |
989 | ||
990 | dev_hold(dev); | |
991 | ret = crypto_aead_decrypt(req); | |
992 | if (ret == -EINPROGRESS) { | |
c3b7d0bd | 993 | return ERR_PTR(ret); |
c09440f7 SD |
994 | } else if (ret != 0) { |
995 | /* decryption/authentication failed | |
996 | * 10.6 if validateFrames is disabled, deliver anyway | |
997 | */ | |
998 | if (ret != -EBADMSG) { | |
999 | kfree_skb(skb); | |
c3b7d0bd | 1000 | skb = ERR_PTR(ret); |
c09440f7 SD |
1001 | } |
1002 | } else { | |
1003 | macsec_skb_cb(skb)->valid = true; | |
1004 | } | |
1005 | dev_put(dev); | |
1006 | ||
1007 | aead_request_free(req); | |
1008 | ||
1009 | return skb; | |
1010 | } | |
1011 | ||
1012 | static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1013 | { | |
1014 | struct macsec_rx_sc *rx_sc; | |
1015 | ||
1016 | for_each_rxsc(secy, rx_sc) { | |
1017 | if (rx_sc->sci == sci) | |
1018 | return rx_sc; | |
1019 | } | |
1020 | ||
1021 | return NULL; | |
1022 | } | |
1023 | ||
1024 | static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) | |
1025 | { | |
1026 | struct macsec_rx_sc *rx_sc; | |
1027 | ||
1028 | for_each_rxsc_rtnl(secy, rx_sc) { | |
1029 | if (rx_sc->sci == sci) | |
1030 | return rx_sc; | |
1031 | } | |
1032 | ||
1033 | return NULL; | |
1034 | } | |
1035 | ||
1036 | static void handle_not_macsec(struct sk_buff *skb) | |
1037 | { | |
1038 | struct macsec_rxh_data *rxd; | |
1039 | struct macsec_dev *macsec; | |
1040 | ||
1041 | rcu_read_lock(); | |
1042 | rxd = macsec_data_rcu(skb->dev); | |
1043 | ||
1044 | /* 10.6 If the management control validateFrames is not | |
1045 | * Strict, frames without a SecTAG are received, counted, and | |
1046 | * delivered to the Controlled Port | |
1047 | */ | |
1048 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1049 | struct sk_buff *nskb; | |
c09440f7 SD |
1050 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
1051 | ||
1052 | if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1053 | u64_stats_update_begin(&secy_stats->syncp); | |
1054 | secy_stats->stats.InPktsNoTag++; | |
1055 | u64_stats_update_end(&secy_stats->syncp); | |
1056 | continue; | |
1057 | } | |
1058 | ||
1059 | /* deliver on this port */ | |
1060 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1061 | if (!nskb) | |
1062 | break; | |
1063 | ||
1064 | nskb->dev = macsec->secy.netdev; | |
1065 | ||
863483c9 | 1066 | if (netif_rx(nskb) == NET_RX_SUCCESS) { |
c09440f7 SD |
1067 | u64_stats_update_begin(&secy_stats->syncp); |
1068 | secy_stats->stats.InPktsUntagged++; | |
1069 | u64_stats_update_end(&secy_stats->syncp); | |
c09440f7 SD |
1070 | } |
1071 | } | |
1072 | ||
1073 | rcu_read_unlock(); | |
1074 | } | |
1075 | ||
1076 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) | |
1077 | { | |
1078 | struct sk_buff *skb = *pskb; | |
1079 | struct net_device *dev = skb->dev; | |
1080 | struct macsec_eth_header *hdr; | |
1081 | struct macsec_secy *secy = NULL; | |
1082 | struct macsec_rx_sc *rx_sc; | |
1083 | struct macsec_rx_sa *rx_sa; | |
1084 | struct macsec_rxh_data *rxd; | |
1085 | struct macsec_dev *macsec; | |
1086 | sci_t sci; | |
1087 | u32 pn; | |
1088 | bool cbit; | |
1089 | struct pcpu_rx_sc_stats *rxsc_stats; | |
1090 | struct pcpu_secy_stats *secy_stats; | |
1091 | bool pulled_sci; | |
5491e7c6 | 1092 | int ret; |
c09440f7 SD |
1093 | |
1094 | if (skb_headroom(skb) < ETH_HLEN) | |
1095 | goto drop_direct; | |
1096 | ||
1097 | hdr = macsec_ethhdr(skb); | |
1098 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) { | |
1099 | handle_not_macsec(skb); | |
1100 | ||
1101 | /* and deliver to the uncontrolled port */ | |
1102 | return RX_HANDLER_PASS; | |
1103 | } | |
1104 | ||
1105 | skb = skb_unshare(skb, GFP_ATOMIC); | |
1106 | if (!skb) { | |
1107 | *pskb = NULL; | |
1108 | return RX_HANDLER_CONSUMED; | |
1109 | } | |
1110 | ||
1111 | pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); | |
1112 | if (!pulled_sci) { | |
1113 | if (!pskb_may_pull(skb, macsec_extra_len(false))) | |
1114 | goto drop_direct; | |
1115 | } | |
1116 | ||
1117 | hdr = macsec_ethhdr(skb); | |
1118 | ||
1119 | /* Frames with a SecTAG that has the TCI E bit set but the C | |
1120 | * bit clear are discarded, as this reserved encoding is used | |
1121 | * to identify frames with a SecTAG that are not to be | |
1122 | * delivered to the Controlled Port. | |
1123 | */ | |
1124 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) | |
1125 | return RX_HANDLER_PASS; | |
1126 | ||
1127 | /* now, pull the extra length */ | |
1128 | if (hdr->tci_an & MACSEC_TCI_SC) { | |
1129 | if (!pulled_sci) | |
1130 | goto drop_direct; | |
1131 | } | |
1132 | ||
1133 | /* ethernet header is part of crypto processing */ | |
1134 | skb_push(skb, ETH_HLEN); | |
1135 | ||
1136 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); | |
1137 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; | |
1138 | sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); | |
1139 | ||
1140 | rcu_read_lock(); | |
1141 | rxd = macsec_data_rcu(skb->dev); | |
1142 | ||
1143 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1144 | struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); | |
c78ebe1d | 1145 | sc = sc ? macsec_rxsc_get(sc) : NULL; |
c09440f7 SD |
1146 | |
1147 | if (sc) { | |
1148 | secy = &macsec->secy; | |
1149 | rx_sc = sc; | |
1150 | break; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | if (!secy) | |
1155 | goto nosci; | |
1156 | ||
1157 | dev = secy->netdev; | |
1158 | macsec = macsec_priv(dev); | |
1159 | secy_stats = this_cpu_ptr(macsec->stats); | |
1160 | rxsc_stats = this_cpu_ptr(rx_sc->stats); | |
1161 | ||
1162 | if (!macsec_validate_skb(skb, secy->icv_len)) { | |
1163 | u64_stats_update_begin(&secy_stats->syncp); | |
1164 | secy_stats->stats.InPktsBadTag++; | |
1165 | u64_stats_update_end(&secy_stats->syncp); | |
1166 | goto drop_nosa; | |
1167 | } | |
1168 | ||
1169 | rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); | |
1170 | if (!rx_sa) { | |
1171 | /* 10.6.1 if the SA is not in use */ | |
1172 | ||
1173 | /* If validateFrames is Strict or the C bit in the | |
1174 | * SecTAG is set, discard | |
1175 | */ | |
1176 | if (hdr->tci_an & MACSEC_TCI_C || | |
1177 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
1178 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1179 | rxsc_stats->stats.InPktsNotUsingSA++; | |
1180 | u64_stats_update_end(&rxsc_stats->syncp); | |
1181 | goto drop_nosa; | |
1182 | } | |
1183 | ||
1184 | /* not Strict, the frame (with the SecTAG and ICV | |
1185 | * removed) is delivered to the Controlled Port. | |
1186 | */ | |
1187 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1188 | rxsc_stats->stats.InPktsUnusedSA++; | |
1189 | u64_stats_update_end(&rxsc_stats->syncp); | |
1190 | goto deliver; | |
1191 | } | |
1192 | ||
1193 | /* First, PN check to avoid decrypting obviously wrong packets */ | |
1194 | pn = ntohl(hdr->packet_number); | |
1195 | if (secy->replay_protect) { | |
1196 | bool late; | |
1197 | ||
1198 | spin_lock(&rx_sa->lock); | |
1199 | late = rx_sa->next_pn >= secy->replay_window && | |
1200 | pn < (rx_sa->next_pn - secy->replay_window); | |
1201 | spin_unlock(&rx_sa->lock); | |
1202 | ||
1203 | if (late) { | |
1204 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1205 | rxsc_stats->stats.InPktsLate++; | |
1206 | u64_stats_update_end(&rxsc_stats->syncp); | |
1207 | goto drop; | |
1208 | } | |
1209 | } | |
1210 | ||
e3a3b626 BG |
1211 | macsec_skb_cb(skb)->rx_sa = rx_sa; |
1212 | ||
c09440f7 SD |
1213 | /* Disabled && !changed text => skip validation */ |
1214 | if (hdr->tci_an & MACSEC_TCI_C || | |
1215 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) | |
1216 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); | |
1217 | ||
c3b7d0bd SD |
1218 | if (IS_ERR(skb)) { |
1219 | /* the decrypt callback needs the reference */ | |
c78ebe1d | 1220 | if (PTR_ERR(skb) != -EINPROGRESS) { |
c3b7d0bd | 1221 | macsec_rxsa_put(rx_sa); |
c78ebe1d SD |
1222 | macsec_rxsc_put(rx_sc); |
1223 | } | |
c09440f7 SD |
1224 | rcu_read_unlock(); |
1225 | *pskb = NULL; | |
1226 | return RX_HANDLER_CONSUMED; | |
1227 | } | |
1228 | ||
1229 | if (!macsec_post_decrypt(skb, secy, pn)) | |
1230 | goto drop; | |
1231 | ||
1232 | deliver: | |
1233 | macsec_finalize_skb(skb, secy->icv_len, | |
1234 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1235 | macsec_reset_skb(skb, secy->netdev); | |
1236 | ||
497f358a SD |
1237 | if (rx_sa) |
1238 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 1239 | macsec_rxsc_put(rx_sc); |
5491e7c6 PA |
1240 | |
1241 | ret = gro_cells_receive(&macsec->gro_cells, skb); | |
1242 | if (ret == NET_RX_SUCCESS) | |
1243 | count_rx(dev, skb->len); | |
1244 | else | |
1245 | macsec->secy.netdev->stats.rx_dropped++; | |
c09440f7 SD |
1246 | |
1247 | rcu_read_unlock(); | |
1248 | ||
5491e7c6 PA |
1249 | *pskb = NULL; |
1250 | return RX_HANDLER_CONSUMED; | |
c09440f7 SD |
1251 | |
1252 | drop: | |
1253 | macsec_rxsa_put(rx_sa); | |
1254 | drop_nosa: | |
c78ebe1d | 1255 | macsec_rxsc_put(rx_sc); |
c09440f7 SD |
1256 | rcu_read_unlock(); |
1257 | drop_direct: | |
1258 | kfree_skb(skb); | |
1259 | *pskb = NULL; | |
1260 | return RX_HANDLER_CONSUMED; | |
1261 | ||
1262 | nosci: | |
1263 | /* 10.6.1 if the SC is not found */ | |
1264 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); | |
1265 | if (!cbit) | |
1266 | macsec_finalize_skb(skb, DEFAULT_ICV_LEN, | |
1267 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1268 | ||
1269 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1270 | struct sk_buff *nskb; | |
c09440f7 SD |
1271 | |
1272 | secy_stats = this_cpu_ptr(macsec->stats); | |
1273 | ||
1274 | /* If validateFrames is Strict or the C bit in the | |
1275 | * SecTAG is set, discard | |
1276 | */ | |
1277 | if (cbit || | |
1278 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1279 | u64_stats_update_begin(&secy_stats->syncp); | |
1280 | secy_stats->stats.InPktsNoSCI++; | |
1281 | u64_stats_update_end(&secy_stats->syncp); | |
1282 | continue; | |
1283 | } | |
1284 | ||
1285 | /* not strict, the frame (with the SecTAG and ICV | |
1286 | * removed) is delivered to the Controlled Port. | |
1287 | */ | |
1288 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1289 | if (!nskb) | |
1290 | break; | |
1291 | ||
1292 | macsec_reset_skb(nskb, macsec->secy.netdev); | |
1293 | ||
1294 | ret = netif_rx(nskb); | |
1295 | if (ret == NET_RX_SUCCESS) { | |
1296 | u64_stats_update_begin(&secy_stats->syncp); | |
1297 | secy_stats->stats.InPktsUnknownSCI++; | |
1298 | u64_stats_update_end(&secy_stats->syncp); | |
1299 | } else { | |
1300 | macsec->secy.netdev->stats.rx_dropped++; | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | rcu_read_unlock(); | |
1305 | *pskb = skb; | |
1306 | return RX_HANDLER_PASS; | |
1307 | } | |
1308 | ||
1309 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) | |
1310 | { | |
1311 | struct crypto_aead *tfm; | |
1312 | int ret; | |
1313 | ||
6052f7fb | 1314 | tfm = crypto_alloc_aead("gcm(aes)", 0, 0); |
34aedfee DC |
1315 | |
1316 | if (IS_ERR(tfm)) | |
1317 | return tfm; | |
c09440f7 SD |
1318 | |
1319 | ret = crypto_aead_setkey(tfm, key, key_len); | |
34aedfee DC |
1320 | if (ret < 0) |
1321 | goto fail; | |
c09440f7 SD |
1322 | |
1323 | ret = crypto_aead_setauthsize(tfm, icv_len); | |
34aedfee DC |
1324 | if (ret < 0) |
1325 | goto fail; | |
c09440f7 SD |
1326 | |
1327 | return tfm; | |
34aedfee DC |
1328 | fail: |
1329 | crypto_free_aead(tfm); | |
1330 | return ERR_PTR(ret); | |
c09440f7 SD |
1331 | } |
1332 | ||
1333 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, | |
1334 | int icv_len) | |
1335 | { | |
1336 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); | |
1337 | if (!rx_sa->stats) | |
34aedfee | 1338 | return -ENOMEM; |
c09440f7 SD |
1339 | |
1340 | rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1341 | if (IS_ERR(rx_sa->key.tfm)) { |
c09440f7 | 1342 | free_percpu(rx_sa->stats); |
34aedfee | 1343 | return PTR_ERR(rx_sa->key.tfm); |
c09440f7 SD |
1344 | } |
1345 | ||
1346 | rx_sa->active = false; | |
1347 | rx_sa->next_pn = 1; | |
e187246f | 1348 | refcount_set(&rx_sa->refcnt, 1); |
c09440f7 SD |
1349 | spin_lock_init(&rx_sa->lock); |
1350 | ||
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) | |
1355 | { | |
1356 | rx_sa->active = false; | |
1357 | ||
1358 | macsec_rxsa_put(rx_sa); | |
1359 | } | |
1360 | ||
1361 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) | |
1362 | { | |
1363 | int i; | |
1364 | ||
1365 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
1366 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); | |
1367 | ||
1368 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); | |
1369 | if (sa) | |
1370 | clear_rx_sa(sa); | |
1371 | } | |
1372 | ||
1373 | macsec_rxsc_put(rx_sc); | |
1374 | } | |
1375 | ||
1376 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1377 | { | |
1378 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; | |
1379 | ||
1380 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); | |
1381 | rx_sc; | |
1382 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { | |
1383 | if (rx_sc->sci == sci) { | |
1384 | if (rx_sc->active) | |
1385 | secy->n_rx_sc--; | |
1386 | rcu_assign_pointer(*rx_scp, rx_sc->next); | |
1387 | return rx_sc; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | return NULL; | |
1392 | } | |
1393 | ||
1394 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci) | |
1395 | { | |
1396 | struct macsec_rx_sc *rx_sc; | |
1397 | struct macsec_dev *macsec; | |
1398 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
1399 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
1400 | struct macsec_secy *secy; | |
1401 | ||
1402 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
1403 | if (find_rx_sc_rtnl(&macsec->secy, sci)) | |
1404 | return ERR_PTR(-EEXIST); | |
1405 | } | |
1406 | ||
1407 | rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); | |
1408 | if (!rx_sc) | |
1409 | return ERR_PTR(-ENOMEM); | |
1410 | ||
1411 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); | |
1412 | if (!rx_sc->stats) { | |
1413 | kfree(rx_sc); | |
1414 | return ERR_PTR(-ENOMEM); | |
1415 | } | |
1416 | ||
1417 | rx_sc->sci = sci; | |
1418 | rx_sc->active = true; | |
8676d76f | 1419 | refcount_set(&rx_sc->refcnt, 1); |
c09440f7 SD |
1420 | |
1421 | secy = &macsec_priv(dev)->secy; | |
1422 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); | |
1423 | rcu_assign_pointer(secy->rx_sc, rx_sc); | |
1424 | ||
1425 | if (rx_sc->active) | |
1426 | secy->n_rx_sc++; | |
1427 | ||
1428 | return rx_sc; | |
1429 | } | |
1430 | ||
1431 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, | |
1432 | int icv_len) | |
1433 | { | |
1434 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); | |
1435 | if (!tx_sa->stats) | |
34aedfee | 1436 | return -ENOMEM; |
c09440f7 SD |
1437 | |
1438 | tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1439 | if (IS_ERR(tx_sa->key.tfm)) { |
c09440f7 | 1440 | free_percpu(tx_sa->stats); |
34aedfee | 1441 | return PTR_ERR(tx_sa->key.tfm); |
c09440f7 SD |
1442 | } |
1443 | ||
1444 | tx_sa->active = false; | |
28206cdb | 1445 | refcount_set(&tx_sa->refcnt, 1); |
c09440f7 SD |
1446 | spin_lock_init(&tx_sa->lock); |
1447 | ||
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) | |
1452 | { | |
1453 | tx_sa->active = false; | |
1454 | ||
1455 | macsec_txsa_put(tx_sa); | |
1456 | } | |
1457 | ||
489111e5 | 1458 | static struct genl_family macsec_fam; |
c09440f7 SD |
1459 | |
1460 | static struct net_device *get_dev_from_nl(struct net *net, | |
1461 | struct nlattr **attrs) | |
1462 | { | |
1463 | int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); | |
1464 | struct net_device *dev; | |
1465 | ||
1466 | dev = __dev_get_by_index(net, ifindex); | |
1467 | if (!dev) | |
1468 | return ERR_PTR(-ENODEV); | |
1469 | ||
1470 | if (!netif_is_macsec(dev)) | |
1471 | return ERR_PTR(-ENODEV); | |
1472 | ||
1473 | return dev; | |
1474 | } | |
1475 | ||
1476 | static sci_t nla_get_sci(const struct nlattr *nla) | |
1477 | { | |
1478 | return (__force sci_t)nla_get_u64(nla); | |
1479 | } | |
1480 | ||
f60d94c0 ND |
1481 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1482 | int padattr) | |
c09440f7 | 1483 | { |
f60d94c0 | 1484 | return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
c09440f7 SD |
1485 | } |
1486 | ||
1487 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, | |
1488 | struct nlattr **attrs, | |
1489 | struct nlattr **tb_sa, | |
1490 | struct net_device **devp, | |
1491 | struct macsec_secy **secyp, | |
1492 | struct macsec_tx_sc **scp, | |
1493 | u8 *assoc_num) | |
1494 | { | |
1495 | struct net_device *dev; | |
1496 | struct macsec_secy *secy; | |
1497 | struct macsec_tx_sc *tx_sc; | |
1498 | struct macsec_tx_sa *tx_sa; | |
1499 | ||
1500 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1501 | return ERR_PTR(-EINVAL); | |
1502 | ||
1503 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1504 | ||
1505 | dev = get_dev_from_nl(net, attrs); | |
1506 | if (IS_ERR(dev)) | |
1507 | return ERR_CAST(dev); | |
1508 | ||
1509 | if (*assoc_num >= MACSEC_NUM_AN) | |
1510 | return ERR_PTR(-EINVAL); | |
1511 | ||
1512 | secy = &macsec_priv(dev)->secy; | |
1513 | tx_sc = &secy->tx_sc; | |
1514 | ||
1515 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); | |
1516 | if (!tx_sa) | |
1517 | return ERR_PTR(-ENODEV); | |
1518 | ||
1519 | *devp = dev; | |
1520 | *scp = tx_sc; | |
1521 | *secyp = secy; | |
1522 | return tx_sa; | |
1523 | } | |
1524 | ||
1525 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, | |
1526 | struct nlattr **attrs, | |
1527 | struct nlattr **tb_rxsc, | |
1528 | struct net_device **devp, | |
1529 | struct macsec_secy **secyp) | |
1530 | { | |
1531 | struct net_device *dev; | |
1532 | struct macsec_secy *secy; | |
1533 | struct macsec_rx_sc *rx_sc; | |
1534 | sci_t sci; | |
1535 | ||
1536 | dev = get_dev_from_nl(net, attrs); | |
1537 | if (IS_ERR(dev)) | |
1538 | return ERR_CAST(dev); | |
1539 | ||
1540 | secy = &macsec_priv(dev)->secy; | |
1541 | ||
1542 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1543 | return ERR_PTR(-EINVAL); | |
1544 | ||
1545 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1546 | rx_sc = find_rx_sc_rtnl(secy, sci); | |
1547 | if (!rx_sc) | |
1548 | return ERR_PTR(-ENODEV); | |
1549 | ||
1550 | *secyp = secy; | |
1551 | *devp = dev; | |
1552 | ||
1553 | return rx_sc; | |
1554 | } | |
1555 | ||
1556 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, | |
1557 | struct nlattr **attrs, | |
1558 | struct nlattr **tb_rxsc, | |
1559 | struct nlattr **tb_sa, | |
1560 | struct net_device **devp, | |
1561 | struct macsec_secy **secyp, | |
1562 | struct macsec_rx_sc **scp, | |
1563 | u8 *assoc_num) | |
1564 | { | |
1565 | struct macsec_rx_sc *rx_sc; | |
1566 | struct macsec_rx_sa *rx_sa; | |
1567 | ||
1568 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1569 | return ERR_PTR(-EINVAL); | |
1570 | ||
1571 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1572 | if (*assoc_num >= MACSEC_NUM_AN) | |
1573 | return ERR_PTR(-EINVAL); | |
1574 | ||
1575 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); | |
1576 | if (IS_ERR(rx_sc)) | |
1577 | return ERR_CAST(rx_sc); | |
1578 | ||
1579 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); | |
1580 | if (!rx_sa) | |
1581 | return ERR_PTR(-ENODEV); | |
1582 | ||
1583 | *scp = rx_sc; | |
1584 | return rx_sa; | |
1585 | } | |
1586 | ||
1587 | ||
1588 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { | |
1589 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
1590 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, | |
1591 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, | |
1592 | }; | |
1593 | ||
1594 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { | |
1595 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, | |
1596 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1597 | }; | |
1598 | ||
1599 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { | |
1600 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, | |
1601 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1602 | [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 }, | |
8acca6ac SD |
1603 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1604 | .len = MACSEC_KEYID_LEN, }, | |
c09440f7 | 1605 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
e8660ded | 1606 | .len = MACSEC_MAX_KEY_LEN, }, |
c09440f7 SD |
1607 | }; |
1608 | ||
1609 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) | |
1610 | { | |
1611 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) | |
1612 | return -EINVAL; | |
1613 | ||
fceb6435 JB |
1614 | if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX, |
1615 | attrs[MACSEC_ATTR_SA_CONFIG], | |
1616 | macsec_genl_sa_policy, NULL)) | |
c09440f7 SD |
1617 | return -EINVAL; |
1618 | ||
1619 | return 0; | |
1620 | } | |
1621 | ||
1622 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) | |
1623 | { | |
1624 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) | |
1625 | return -EINVAL; | |
1626 | ||
fceb6435 JB |
1627 | if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX, |
1628 | attrs[MACSEC_ATTR_RXSC_CONFIG], | |
1629 | macsec_genl_rxsc_policy, NULL)) | |
c09440f7 SD |
1630 | return -EINVAL; |
1631 | ||
1632 | return 0; | |
1633 | } | |
1634 | ||
1635 | static bool validate_add_rxsa(struct nlattr **attrs) | |
1636 | { | |
1637 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1638 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1639 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1640 | return false; | |
1641 | ||
1642 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1643 | return false; | |
1644 | ||
1645 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1646 | return false; | |
1647 | ||
1648 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1649 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1650 | return false; | |
1651 | } | |
1652 | ||
8acca6ac SD |
1653 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1654 | return false; | |
1655 | ||
c09440f7 SD |
1656 | return true; |
1657 | } | |
1658 | ||
1659 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1660 | { | |
1661 | struct net_device *dev; | |
1662 | struct nlattr **attrs = info->attrs; | |
1663 | struct macsec_secy *secy; | |
1664 | struct macsec_rx_sc *rx_sc; | |
1665 | struct macsec_rx_sa *rx_sa; | |
1666 | unsigned char assoc_num; | |
1667 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1668 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1669 | int err; |
c09440f7 SD |
1670 | |
1671 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1672 | return -EINVAL; | |
1673 | ||
1674 | if (parse_sa_config(attrs, tb_sa)) | |
1675 | return -EINVAL; | |
1676 | ||
1677 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1678 | return -EINVAL; | |
1679 | ||
1680 | if (!validate_add_rxsa(tb_sa)) | |
1681 | return -EINVAL; | |
1682 | ||
1683 | rtnl_lock(); | |
1684 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
36b232c8 | 1685 | if (IS_ERR(rx_sc)) { |
c09440f7 SD |
1686 | rtnl_unlock(); |
1687 | return PTR_ERR(rx_sc); | |
1688 | } | |
1689 | ||
1690 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1691 | ||
1692 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1693 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", | |
1694 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1695 | rtnl_unlock(); | |
1696 | return -EINVAL; | |
1697 | } | |
1698 | ||
1699 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); | |
1700 | if (rx_sa) { | |
1701 | rtnl_unlock(); | |
1702 | return -EBUSY; | |
1703 | } | |
1704 | ||
1705 | rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); | |
34aedfee | 1706 | if (!rx_sa) { |
c09440f7 SD |
1707 | rtnl_unlock(); |
1708 | return -ENOMEM; | |
1709 | } | |
1710 | ||
34aedfee DC |
1711 | err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1712 | secy->key_len, secy->icv_len); | |
1713 | if (err < 0) { | |
1714 | kfree(rx_sa); | |
1715 | rtnl_unlock(); | |
1716 | return err; | |
1717 | } | |
1718 | ||
c09440f7 SD |
1719 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
1720 | spin_lock_bh(&rx_sa->lock); | |
1721 | rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
1722 | spin_unlock_bh(&rx_sa->lock); | |
1723 | } | |
1724 | ||
1725 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1726 | rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1727 | ||
1968a0b8 | 1728 | nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
c09440f7 SD |
1729 | rx_sa->sc = rx_sc; |
1730 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); | |
1731 | ||
1732 | rtnl_unlock(); | |
1733 | ||
1734 | return 0; | |
1735 | } | |
1736 | ||
1737 | static bool validate_add_rxsc(struct nlattr **attrs) | |
1738 | { | |
1739 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) | |
1740 | return false; | |
1741 | ||
1742 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { | |
1743 | if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) | |
1744 | return false; | |
1745 | } | |
1746 | ||
1747 | return true; | |
1748 | } | |
1749 | ||
1750 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1751 | { | |
1752 | struct net_device *dev; | |
1753 | sci_t sci = MACSEC_UNDEF_SCI; | |
1754 | struct nlattr **attrs = info->attrs; | |
1755 | struct macsec_rx_sc *rx_sc; | |
1756 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1757 | ||
1758 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1759 | return -EINVAL; | |
1760 | ||
1761 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1762 | return -EINVAL; | |
1763 | ||
1764 | if (!validate_add_rxsc(tb_rxsc)) | |
1765 | return -EINVAL; | |
1766 | ||
1767 | rtnl_lock(); | |
1768 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1769 | if (IS_ERR(dev)) { | |
1770 | rtnl_unlock(); | |
1771 | return PTR_ERR(dev); | |
1772 | } | |
1773 | ||
1774 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1775 | ||
1776 | rx_sc = create_rx_sc(dev, sci); | |
1777 | if (IS_ERR(rx_sc)) { | |
1778 | rtnl_unlock(); | |
1779 | return PTR_ERR(rx_sc); | |
1780 | } | |
1781 | ||
1782 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) | |
1783 | rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
1784 | ||
1785 | rtnl_unlock(); | |
1786 | ||
1787 | return 0; | |
1788 | } | |
1789 | ||
1790 | static bool validate_add_txsa(struct nlattr **attrs) | |
1791 | { | |
1792 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1793 | !attrs[MACSEC_SA_ATTR_PN] || | |
1794 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1795 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1796 | return false; | |
1797 | ||
1798 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1799 | return false; | |
1800 | ||
1801 | if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1802 | return false; | |
1803 | ||
1804 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1805 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1806 | return false; | |
1807 | } | |
1808 | ||
8acca6ac SD |
1809 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1810 | return false; | |
1811 | ||
c09440f7 SD |
1812 | return true; |
1813 | } | |
1814 | ||
1815 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) | |
1816 | { | |
1817 | struct net_device *dev; | |
1818 | struct nlattr **attrs = info->attrs; | |
1819 | struct macsec_secy *secy; | |
1820 | struct macsec_tx_sc *tx_sc; | |
1821 | struct macsec_tx_sa *tx_sa; | |
1822 | unsigned char assoc_num; | |
1823 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1824 | int err; |
c09440f7 SD |
1825 | |
1826 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1827 | return -EINVAL; | |
1828 | ||
1829 | if (parse_sa_config(attrs, tb_sa)) | |
1830 | return -EINVAL; | |
1831 | ||
1832 | if (!validate_add_txsa(tb_sa)) | |
1833 | return -EINVAL; | |
1834 | ||
1835 | rtnl_lock(); | |
1836 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1837 | if (IS_ERR(dev)) { | |
1838 | rtnl_unlock(); | |
1839 | return PTR_ERR(dev); | |
1840 | } | |
1841 | ||
1842 | secy = &macsec_priv(dev)->secy; | |
1843 | tx_sc = &secy->tx_sc; | |
1844 | ||
1845 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1846 | ||
1847 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1848 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", | |
1849 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1850 | rtnl_unlock(); | |
1851 | return -EINVAL; | |
1852 | } | |
1853 | ||
1854 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); | |
1855 | if (tx_sa) { | |
1856 | rtnl_unlock(); | |
1857 | return -EBUSY; | |
1858 | } | |
1859 | ||
1860 | tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); | |
34aedfee | 1861 | if (!tx_sa) { |
c09440f7 SD |
1862 | rtnl_unlock(); |
1863 | return -ENOMEM; | |
1864 | } | |
1865 | ||
34aedfee DC |
1866 | err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1867 | secy->key_len, secy->icv_len); | |
1868 | if (err < 0) { | |
1869 | kfree(tx_sa); | |
1870 | rtnl_unlock(); | |
1871 | return err; | |
1872 | } | |
1873 | ||
1968a0b8 | 1874 | nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
c09440f7 SD |
1875 | |
1876 | spin_lock_bh(&tx_sa->lock); | |
1877 | tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
1878 | spin_unlock_bh(&tx_sa->lock); | |
1879 | ||
1880 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1881 | tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1882 | ||
1883 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) | |
1884 | secy->operational = true; | |
1885 | ||
1886 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); | |
1887 | ||
1888 | rtnl_unlock(); | |
1889 | ||
1890 | return 0; | |
1891 | } | |
1892 | ||
1893 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1894 | { | |
1895 | struct nlattr **attrs = info->attrs; | |
1896 | struct net_device *dev; | |
1897 | struct macsec_secy *secy; | |
1898 | struct macsec_rx_sc *rx_sc; | |
1899 | struct macsec_rx_sa *rx_sa; | |
1900 | u8 assoc_num; | |
1901 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1902 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1903 | ||
1904 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1905 | return -EINVAL; | |
1906 | ||
1907 | if (parse_sa_config(attrs, tb_sa)) | |
1908 | return -EINVAL; | |
1909 | ||
1910 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1911 | return -EINVAL; | |
1912 | ||
1913 | rtnl_lock(); | |
1914 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
1915 | &dev, &secy, &rx_sc, &assoc_num); | |
1916 | if (IS_ERR(rx_sa)) { | |
1917 | rtnl_unlock(); | |
1918 | return PTR_ERR(rx_sa); | |
1919 | } | |
1920 | ||
1921 | if (rx_sa->active) { | |
1922 | rtnl_unlock(); | |
1923 | return -EBUSY; | |
1924 | } | |
1925 | ||
1926 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); | |
1927 | clear_rx_sa(rx_sa); | |
1928 | ||
1929 | rtnl_unlock(); | |
1930 | ||
1931 | return 0; | |
1932 | } | |
1933 | ||
1934 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1935 | { | |
1936 | struct nlattr **attrs = info->attrs; | |
1937 | struct net_device *dev; | |
1938 | struct macsec_secy *secy; | |
1939 | struct macsec_rx_sc *rx_sc; | |
1940 | sci_t sci; | |
1941 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1942 | ||
1943 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1944 | return -EINVAL; | |
1945 | ||
1946 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1947 | return -EINVAL; | |
1948 | ||
1949 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1950 | return -EINVAL; | |
1951 | ||
1952 | rtnl_lock(); | |
1953 | dev = get_dev_from_nl(genl_info_net(info), info->attrs); | |
1954 | if (IS_ERR(dev)) { | |
1955 | rtnl_unlock(); | |
1956 | return PTR_ERR(dev); | |
1957 | } | |
1958 | ||
1959 | secy = &macsec_priv(dev)->secy; | |
1960 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1961 | ||
1962 | rx_sc = del_rx_sc(secy, sci); | |
1963 | if (!rx_sc) { | |
1964 | rtnl_unlock(); | |
1965 | return -ENODEV; | |
1966 | } | |
1967 | ||
1968 | free_rx_sc(rx_sc); | |
1969 | rtnl_unlock(); | |
1970 | ||
1971 | return 0; | |
1972 | } | |
1973 | ||
1974 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) | |
1975 | { | |
1976 | struct nlattr **attrs = info->attrs; | |
1977 | struct net_device *dev; | |
1978 | struct macsec_secy *secy; | |
1979 | struct macsec_tx_sc *tx_sc; | |
1980 | struct macsec_tx_sa *tx_sa; | |
1981 | u8 assoc_num; | |
1982 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
1983 | ||
1984 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1985 | return -EINVAL; | |
1986 | ||
1987 | if (parse_sa_config(attrs, tb_sa)) | |
1988 | return -EINVAL; | |
1989 | ||
1990 | rtnl_lock(); | |
1991 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
1992 | &dev, &secy, &tx_sc, &assoc_num); | |
1993 | if (IS_ERR(tx_sa)) { | |
1994 | rtnl_unlock(); | |
1995 | return PTR_ERR(tx_sa); | |
1996 | } | |
1997 | ||
1998 | if (tx_sa->active) { | |
1999 | rtnl_unlock(); | |
2000 | return -EBUSY; | |
2001 | } | |
2002 | ||
2003 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); | |
2004 | clear_tx_sa(tx_sa); | |
2005 | ||
2006 | rtnl_unlock(); | |
2007 | ||
2008 | return 0; | |
2009 | } | |
2010 | ||
2011 | static bool validate_upd_sa(struct nlattr **attrs) | |
2012 | { | |
2013 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
2014 | attrs[MACSEC_SA_ATTR_KEY] || | |
2015 | attrs[MACSEC_SA_ATTR_KEYID]) | |
2016 | return false; | |
2017 | ||
2018 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
2019 | return false; | |
2020 | ||
2021 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
2022 | return false; | |
2023 | ||
2024 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
2025 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
2026 | return false; | |
2027 | } | |
2028 | ||
2029 | return true; | |
2030 | } | |
2031 | ||
2032 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) | |
2033 | { | |
2034 | struct nlattr **attrs = info->attrs; | |
2035 | struct net_device *dev; | |
2036 | struct macsec_secy *secy; | |
2037 | struct macsec_tx_sc *tx_sc; | |
2038 | struct macsec_tx_sa *tx_sa; | |
2039 | u8 assoc_num; | |
2040 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
2041 | ||
2042 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2043 | return -EINVAL; | |
2044 | ||
2045 | if (parse_sa_config(attrs, tb_sa)) | |
2046 | return -EINVAL; | |
2047 | ||
2048 | if (!validate_upd_sa(tb_sa)) | |
2049 | return -EINVAL; | |
2050 | ||
2051 | rtnl_lock(); | |
2052 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2053 | &dev, &secy, &tx_sc, &assoc_num); | |
2054 | if (IS_ERR(tx_sa)) { | |
2055 | rtnl_unlock(); | |
2056 | return PTR_ERR(tx_sa); | |
2057 | } | |
2058 | ||
2059 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2060 | spin_lock_bh(&tx_sa->lock); | |
2061 | tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
2062 | spin_unlock_bh(&tx_sa->lock); | |
2063 | } | |
2064 | ||
2065 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2066 | tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2067 | ||
2068 | if (assoc_num == tx_sc->encoding_sa) | |
2069 | secy->operational = tx_sa->active; | |
2070 | ||
2071 | rtnl_unlock(); | |
2072 | ||
2073 | return 0; | |
2074 | } | |
2075 | ||
2076 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2077 | { | |
2078 | struct nlattr **attrs = info->attrs; | |
2079 | struct net_device *dev; | |
2080 | struct macsec_secy *secy; | |
2081 | struct macsec_rx_sc *rx_sc; | |
2082 | struct macsec_rx_sa *rx_sa; | |
2083 | u8 assoc_num; | |
2084 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2085 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
2086 | ||
2087 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2088 | return -EINVAL; | |
2089 | ||
2090 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2091 | return -EINVAL; | |
2092 | ||
2093 | if (parse_sa_config(attrs, tb_sa)) | |
2094 | return -EINVAL; | |
2095 | ||
2096 | if (!validate_upd_sa(tb_sa)) | |
2097 | return -EINVAL; | |
2098 | ||
2099 | rtnl_lock(); | |
2100 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2101 | &dev, &secy, &rx_sc, &assoc_num); | |
2102 | if (IS_ERR(rx_sa)) { | |
2103 | rtnl_unlock(); | |
2104 | return PTR_ERR(rx_sa); | |
2105 | } | |
2106 | ||
2107 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2108 | spin_lock_bh(&rx_sa->lock); | |
2109 | rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
2110 | spin_unlock_bh(&rx_sa->lock); | |
2111 | } | |
2112 | ||
2113 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2114 | rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2115 | ||
2116 | rtnl_unlock(); | |
2117 | return 0; | |
2118 | } | |
2119 | ||
2120 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2121 | { | |
2122 | struct nlattr **attrs = info->attrs; | |
2123 | struct net_device *dev; | |
2124 | struct macsec_secy *secy; | |
2125 | struct macsec_rx_sc *rx_sc; | |
2126 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2127 | ||
2128 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2129 | return -EINVAL; | |
2130 | ||
2131 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2132 | return -EINVAL; | |
2133 | ||
2134 | if (!validate_add_rxsc(tb_rxsc)) | |
2135 | return -EINVAL; | |
2136 | ||
2137 | rtnl_lock(); | |
2138 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
2139 | if (IS_ERR(rx_sc)) { | |
2140 | rtnl_unlock(); | |
2141 | return PTR_ERR(rx_sc); | |
2142 | } | |
2143 | ||
2144 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { | |
2145 | bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
2146 | ||
2147 | if (rx_sc->active != new) | |
2148 | secy->n_rx_sc += new ? 1 : -1; | |
2149 | ||
2150 | rx_sc->active = new; | |
2151 | } | |
2152 | ||
2153 | rtnl_unlock(); | |
2154 | ||
2155 | return 0; | |
2156 | } | |
2157 | ||
2158 | static int copy_tx_sa_stats(struct sk_buff *skb, | |
2159 | struct macsec_tx_sa_stats __percpu *pstats) | |
2160 | { | |
2161 | struct macsec_tx_sa_stats sum = {0, }; | |
2162 | int cpu; | |
2163 | ||
2164 | for_each_possible_cpu(cpu) { | |
2165 | const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu); | |
2166 | ||
2167 | sum.OutPktsProtected += stats->OutPktsProtected; | |
2168 | sum.OutPktsEncrypted += stats->OutPktsEncrypted; | |
2169 | } | |
2170 | ||
2171 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) || | |
2172 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted)) | |
2173 | return -EMSGSIZE; | |
2174 | ||
2175 | return 0; | |
2176 | } | |
2177 | ||
2178 | static int copy_rx_sa_stats(struct sk_buff *skb, | |
2179 | struct macsec_rx_sa_stats __percpu *pstats) | |
2180 | { | |
2181 | struct macsec_rx_sa_stats sum = {0, }; | |
2182 | int cpu; | |
2183 | ||
2184 | for_each_possible_cpu(cpu) { | |
2185 | const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu); | |
2186 | ||
2187 | sum.InPktsOK += stats->InPktsOK; | |
2188 | sum.InPktsInvalid += stats->InPktsInvalid; | |
2189 | sum.InPktsNotValid += stats->InPktsNotValid; | |
2190 | sum.InPktsNotUsingSA += stats->InPktsNotUsingSA; | |
2191 | sum.InPktsUnusedSA += stats->InPktsUnusedSA; | |
2192 | } | |
2193 | ||
2194 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) || | |
2195 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) || | |
2196 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) || | |
2197 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) || | |
2198 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA)) | |
2199 | return -EMSGSIZE; | |
2200 | ||
2201 | return 0; | |
2202 | } | |
2203 | ||
2204 | static int copy_rx_sc_stats(struct sk_buff *skb, | |
2205 | struct pcpu_rx_sc_stats __percpu *pstats) | |
2206 | { | |
2207 | struct macsec_rx_sc_stats sum = {0, }; | |
2208 | int cpu; | |
2209 | ||
2210 | for_each_possible_cpu(cpu) { | |
2211 | const struct pcpu_rx_sc_stats *stats; | |
2212 | struct macsec_rx_sc_stats tmp; | |
2213 | unsigned int start; | |
2214 | ||
2215 | stats = per_cpu_ptr(pstats, cpu); | |
2216 | do { | |
2217 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2218 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2219 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2220 | ||
2221 | sum.InOctetsValidated += tmp.InOctetsValidated; | |
2222 | sum.InOctetsDecrypted += tmp.InOctetsDecrypted; | |
2223 | sum.InPktsUnchecked += tmp.InPktsUnchecked; | |
2224 | sum.InPktsDelayed += tmp.InPktsDelayed; | |
2225 | sum.InPktsOK += tmp.InPktsOK; | |
2226 | sum.InPktsInvalid += tmp.InPktsInvalid; | |
2227 | sum.InPktsLate += tmp.InPktsLate; | |
2228 | sum.InPktsNotValid += tmp.InPktsNotValid; | |
2229 | sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA; | |
2230 | sum.InPktsUnusedSA += tmp.InPktsUnusedSA; | |
2231 | } | |
2232 | ||
f60d94c0 ND |
2233 | if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
2234 | sum.InOctetsValidated, | |
2235 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2236 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, | |
2237 | sum.InOctetsDecrypted, | |
2238 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2239 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, | |
2240 | sum.InPktsUnchecked, | |
2241 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2242 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, | |
2243 | sum.InPktsDelayed, | |
2244 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2245 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, | |
2246 | sum.InPktsOK, | |
2247 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2248 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, | |
2249 | sum.InPktsInvalid, | |
2250 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2251 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, | |
2252 | sum.InPktsLate, | |
2253 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2254 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, | |
2255 | sum.InPktsNotValid, | |
2256 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2257 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
2258 | sum.InPktsNotUsingSA, | |
2259 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2260 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
2261 | sum.InPktsUnusedSA, | |
2262 | MACSEC_RXSC_STATS_ATTR_PAD)) | |
c09440f7 SD |
2263 | return -EMSGSIZE; |
2264 | ||
2265 | return 0; | |
2266 | } | |
2267 | ||
2268 | static int copy_tx_sc_stats(struct sk_buff *skb, | |
2269 | struct pcpu_tx_sc_stats __percpu *pstats) | |
2270 | { | |
2271 | struct macsec_tx_sc_stats sum = {0, }; | |
2272 | int cpu; | |
2273 | ||
2274 | for_each_possible_cpu(cpu) { | |
2275 | const struct pcpu_tx_sc_stats *stats; | |
2276 | struct macsec_tx_sc_stats tmp; | |
2277 | unsigned int start; | |
2278 | ||
2279 | stats = per_cpu_ptr(pstats, cpu); | |
2280 | do { | |
2281 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2282 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2283 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2284 | ||
2285 | sum.OutPktsProtected += tmp.OutPktsProtected; | |
2286 | sum.OutPktsEncrypted += tmp.OutPktsEncrypted; | |
2287 | sum.OutOctetsProtected += tmp.OutOctetsProtected; | |
2288 | sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted; | |
2289 | } | |
2290 | ||
f60d94c0 ND |
2291 | if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
2292 | sum.OutPktsProtected, | |
2293 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2294 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
2295 | sum.OutPktsEncrypted, | |
2296 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2297 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, | |
2298 | sum.OutOctetsProtected, | |
2299 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2300 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, | |
2301 | sum.OutOctetsEncrypted, | |
2302 | MACSEC_TXSC_STATS_ATTR_PAD)) | |
c09440f7 SD |
2303 | return -EMSGSIZE; |
2304 | ||
2305 | return 0; | |
2306 | } | |
2307 | ||
2308 | static int copy_secy_stats(struct sk_buff *skb, | |
2309 | struct pcpu_secy_stats __percpu *pstats) | |
2310 | { | |
2311 | struct macsec_dev_stats sum = {0, }; | |
2312 | int cpu; | |
2313 | ||
2314 | for_each_possible_cpu(cpu) { | |
2315 | const struct pcpu_secy_stats *stats; | |
2316 | struct macsec_dev_stats tmp; | |
2317 | unsigned int start; | |
2318 | ||
2319 | stats = per_cpu_ptr(pstats, cpu); | |
2320 | do { | |
2321 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2322 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2323 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2324 | ||
2325 | sum.OutPktsUntagged += tmp.OutPktsUntagged; | |
2326 | sum.InPktsUntagged += tmp.InPktsUntagged; | |
2327 | sum.OutPktsTooLong += tmp.OutPktsTooLong; | |
2328 | sum.InPktsNoTag += tmp.InPktsNoTag; | |
2329 | sum.InPktsBadTag += tmp.InPktsBadTag; | |
2330 | sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI; | |
2331 | sum.InPktsNoSCI += tmp.InPktsNoSCI; | |
2332 | sum.InPktsOverrun += tmp.InPktsOverrun; | |
2333 | } | |
2334 | ||
f60d94c0 ND |
2335 | if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
2336 | sum.OutPktsUntagged, | |
2337 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2338 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, | |
2339 | sum.InPktsUntagged, | |
2340 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2341 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, | |
2342 | sum.OutPktsTooLong, | |
2343 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2344 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, | |
2345 | sum.InPktsNoTag, | |
2346 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2347 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, | |
2348 | sum.InPktsBadTag, | |
2349 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2350 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, | |
2351 | sum.InPktsUnknownSCI, | |
2352 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2353 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, | |
2354 | sum.InPktsNoSCI, | |
2355 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2356 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, | |
2357 | sum.InPktsOverrun, | |
2358 | MACSEC_SECY_STATS_ATTR_PAD)) | |
c09440f7 SD |
2359 | return -EMSGSIZE; |
2360 | ||
2361 | return 0; | |
2362 | } | |
2363 | ||
2364 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) | |
2365 | { | |
2366 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2367 | struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY); | |
ccfdec90 | 2368 | u64 csid; |
c09440f7 SD |
2369 | |
2370 | if (!secy_nest) | |
2371 | return 1; | |
2372 | ||
ccfdec90 FW |
2373 | switch (secy->key_len) { |
2374 | case MACSEC_GCM_AES_128_SAK_LEN: | |
e8660ded | 2375 | csid = MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
2376 | break; |
2377 | case MACSEC_GCM_AES_256_SAK_LEN: | |
2378 | csid = MACSEC_CIPHER_ID_GCM_AES_256; | |
2379 | break; | |
2380 | default: | |
2381 | goto cancel; | |
2382 | } | |
2383 | ||
f60d94c0 ND |
2384 | if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
2385 | MACSEC_SECY_ATTR_PAD) || | |
2386 | nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, | |
ccfdec90 | 2387 | csid, MACSEC_SECY_ATTR_PAD) || |
c09440f7 SD |
2388 | nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
2389 | nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || | |
2390 | nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || | |
2391 | nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || | |
2392 | nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || | |
2393 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || | |
2394 | nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || | |
2395 | nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || | |
2396 | nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || | |
2397 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) | |
2398 | goto cancel; | |
2399 | ||
2400 | if (secy->replay_protect) { | |
2401 | if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) | |
2402 | goto cancel; | |
2403 | } | |
2404 | ||
2405 | nla_nest_end(skb, secy_nest); | |
2406 | return 0; | |
2407 | ||
2408 | cancel: | |
2409 | nla_nest_cancel(skb, secy_nest); | |
2410 | return 1; | |
2411 | } | |
2412 | ||
2413 | static int dump_secy(struct macsec_secy *secy, struct net_device *dev, | |
2414 | struct sk_buff *skb, struct netlink_callback *cb) | |
2415 | { | |
2416 | struct macsec_rx_sc *rx_sc; | |
2417 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2418 | struct nlattr *txsa_list, *rxsc_list; | |
2419 | int i, j; | |
2420 | void *hdr; | |
2421 | struct nlattr *attr; | |
2422 | ||
2423 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2424 | &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); | |
2425 | if (!hdr) | |
2426 | return -EMSGSIZE; | |
2427 | ||
0a833c29 | 2428 | genl_dump_check_consistent(cb, hdr); |
c09440f7 SD |
2429 | |
2430 | if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) | |
2431 | goto nla_put_failure; | |
2432 | ||
2433 | if (nla_put_secy(secy, skb)) | |
2434 | goto nla_put_failure; | |
2435 | ||
2436 | attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS); | |
2437 | if (!attr) | |
2438 | goto nla_put_failure; | |
2439 | if (copy_tx_sc_stats(skb, tx_sc->stats)) { | |
2440 | nla_nest_cancel(skb, attr); | |
2441 | goto nla_put_failure; | |
2442 | } | |
2443 | nla_nest_end(skb, attr); | |
2444 | ||
2445 | attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS); | |
2446 | if (!attr) | |
2447 | goto nla_put_failure; | |
2448 | if (copy_secy_stats(skb, macsec_priv(dev)->stats)) { | |
2449 | nla_nest_cancel(skb, attr); | |
2450 | goto nla_put_failure; | |
2451 | } | |
2452 | nla_nest_end(skb, attr); | |
2453 | ||
2454 | txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST); | |
2455 | if (!txsa_list) | |
2456 | goto nla_put_failure; | |
2457 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { | |
2458 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); | |
2459 | struct nlattr *txsa_nest; | |
2460 | ||
2461 | if (!tx_sa) | |
2462 | continue; | |
2463 | ||
2464 | txsa_nest = nla_nest_start(skb, j++); | |
2465 | if (!txsa_nest) { | |
2466 | nla_nest_cancel(skb, txsa_list); | |
2467 | goto nla_put_failure; | |
2468 | } | |
2469 | ||
2470 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || | |
2471 | nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) || | |
8acca6ac | 2472 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
c09440f7 SD |
2473 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
2474 | nla_nest_cancel(skb, txsa_nest); | |
2475 | nla_nest_cancel(skb, txsa_list); | |
2476 | goto nla_put_failure; | |
2477 | } | |
2478 | ||
2479 | attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS); | |
2480 | if (!attr) { | |
2481 | nla_nest_cancel(skb, txsa_nest); | |
2482 | nla_nest_cancel(skb, txsa_list); | |
2483 | goto nla_put_failure; | |
2484 | } | |
2485 | if (copy_tx_sa_stats(skb, tx_sa->stats)) { | |
2486 | nla_nest_cancel(skb, attr); | |
2487 | nla_nest_cancel(skb, txsa_nest); | |
2488 | nla_nest_cancel(skb, txsa_list); | |
2489 | goto nla_put_failure; | |
2490 | } | |
2491 | nla_nest_end(skb, attr); | |
2492 | ||
2493 | nla_nest_end(skb, txsa_nest); | |
2494 | } | |
2495 | nla_nest_end(skb, txsa_list); | |
2496 | ||
2497 | rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST); | |
2498 | if (!rxsc_list) | |
2499 | goto nla_put_failure; | |
2500 | ||
2501 | j = 1; | |
2502 | for_each_rxsc_rtnl(secy, rx_sc) { | |
2503 | int k; | |
2504 | struct nlattr *rxsa_list; | |
2505 | struct nlattr *rxsc_nest = nla_nest_start(skb, j++); | |
2506 | ||
2507 | if (!rxsc_nest) { | |
2508 | nla_nest_cancel(skb, rxsc_list); | |
2509 | goto nla_put_failure; | |
2510 | } | |
2511 | ||
2512 | if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || | |
f60d94c0 ND |
2513 | nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
2514 | MACSEC_RXSC_ATTR_PAD)) { | |
c09440f7 SD |
2515 | nla_nest_cancel(skb, rxsc_nest); |
2516 | nla_nest_cancel(skb, rxsc_list); | |
2517 | goto nla_put_failure; | |
2518 | } | |
2519 | ||
2520 | attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS); | |
2521 | if (!attr) { | |
2522 | nla_nest_cancel(skb, rxsc_nest); | |
2523 | nla_nest_cancel(skb, rxsc_list); | |
2524 | goto nla_put_failure; | |
2525 | } | |
2526 | if (copy_rx_sc_stats(skb, rx_sc->stats)) { | |
2527 | nla_nest_cancel(skb, attr); | |
2528 | nla_nest_cancel(skb, rxsc_nest); | |
2529 | nla_nest_cancel(skb, rxsc_list); | |
2530 | goto nla_put_failure; | |
2531 | } | |
2532 | nla_nest_end(skb, attr); | |
2533 | ||
2534 | rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST); | |
2535 | if (!rxsa_list) { | |
2536 | nla_nest_cancel(skb, rxsc_nest); | |
2537 | nla_nest_cancel(skb, rxsc_list); | |
2538 | goto nla_put_failure; | |
2539 | } | |
2540 | ||
2541 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { | |
2542 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); | |
2543 | struct nlattr *rxsa_nest; | |
2544 | ||
2545 | if (!rx_sa) | |
2546 | continue; | |
2547 | ||
2548 | rxsa_nest = nla_nest_start(skb, k++); | |
2549 | if (!rxsa_nest) { | |
2550 | nla_nest_cancel(skb, rxsa_list); | |
2551 | nla_nest_cancel(skb, rxsc_nest); | |
2552 | nla_nest_cancel(skb, rxsc_list); | |
2553 | goto nla_put_failure; | |
2554 | } | |
2555 | ||
2556 | attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS); | |
2557 | if (!attr) { | |
2558 | nla_nest_cancel(skb, rxsa_list); | |
2559 | nla_nest_cancel(skb, rxsc_nest); | |
2560 | nla_nest_cancel(skb, rxsc_list); | |
2561 | goto nla_put_failure; | |
2562 | } | |
2563 | if (copy_rx_sa_stats(skb, rx_sa->stats)) { | |
2564 | nla_nest_cancel(skb, attr); | |
2565 | nla_nest_cancel(skb, rxsa_list); | |
2566 | nla_nest_cancel(skb, rxsc_nest); | |
2567 | nla_nest_cancel(skb, rxsc_list); | |
2568 | goto nla_put_failure; | |
2569 | } | |
2570 | nla_nest_end(skb, attr); | |
2571 | ||
2572 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || | |
2573 | nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) || | |
8acca6ac | 2574 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
c09440f7 SD |
2575 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
2576 | nla_nest_cancel(skb, rxsa_nest); | |
2577 | nla_nest_cancel(skb, rxsc_nest); | |
2578 | nla_nest_cancel(skb, rxsc_list); | |
2579 | goto nla_put_failure; | |
2580 | } | |
2581 | nla_nest_end(skb, rxsa_nest); | |
2582 | } | |
2583 | ||
2584 | nla_nest_end(skb, rxsa_list); | |
2585 | nla_nest_end(skb, rxsc_nest); | |
2586 | } | |
2587 | ||
2588 | nla_nest_end(skb, rxsc_list); | |
2589 | ||
c09440f7 SD |
2590 | genlmsg_end(skb, hdr); |
2591 | ||
2592 | return 0; | |
2593 | ||
2594 | nla_put_failure: | |
c09440f7 SD |
2595 | genlmsg_cancel(skb, hdr); |
2596 | return -EMSGSIZE; | |
2597 | } | |
2598 | ||
96cfc505 SD |
2599 | static int macsec_generation = 1; /* protected by RTNL */ |
2600 | ||
c09440f7 SD |
2601 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
2602 | { | |
2603 | struct net *net = sock_net(skb->sk); | |
2604 | struct net_device *dev; | |
2605 | int dev_idx, d; | |
2606 | ||
2607 | dev_idx = cb->args[0]; | |
2608 | ||
2609 | d = 0; | |
c10c63ea | 2610 | rtnl_lock(); |
96cfc505 SD |
2611 | |
2612 | cb->seq = macsec_generation; | |
2613 | ||
c09440f7 SD |
2614 | for_each_netdev(net, dev) { |
2615 | struct macsec_secy *secy; | |
2616 | ||
2617 | if (d < dev_idx) | |
2618 | goto next; | |
2619 | ||
2620 | if (!netif_is_macsec(dev)) | |
2621 | goto next; | |
2622 | ||
2623 | secy = &macsec_priv(dev)->secy; | |
2624 | if (dump_secy(secy, dev, skb, cb) < 0) | |
2625 | goto done; | |
2626 | next: | |
2627 | d++; | |
2628 | } | |
2629 | ||
2630 | done: | |
c10c63ea | 2631 | rtnl_unlock(); |
c09440f7 SD |
2632 | cb->args[0] = d; |
2633 | return skb->len; | |
2634 | } | |
2635 | ||
2636 | static const struct genl_ops macsec_genl_ops[] = { | |
2637 | { | |
2638 | .cmd = MACSEC_CMD_GET_TXSC, | |
2639 | .dumpit = macsec_dump_txsc, | |
2640 | .policy = macsec_genl_policy, | |
2641 | }, | |
2642 | { | |
2643 | .cmd = MACSEC_CMD_ADD_RXSC, | |
2644 | .doit = macsec_add_rxsc, | |
2645 | .policy = macsec_genl_policy, | |
2646 | .flags = GENL_ADMIN_PERM, | |
2647 | }, | |
2648 | { | |
2649 | .cmd = MACSEC_CMD_DEL_RXSC, | |
2650 | .doit = macsec_del_rxsc, | |
2651 | .policy = macsec_genl_policy, | |
2652 | .flags = GENL_ADMIN_PERM, | |
2653 | }, | |
2654 | { | |
2655 | .cmd = MACSEC_CMD_UPD_RXSC, | |
2656 | .doit = macsec_upd_rxsc, | |
2657 | .policy = macsec_genl_policy, | |
2658 | .flags = GENL_ADMIN_PERM, | |
2659 | }, | |
2660 | { | |
2661 | .cmd = MACSEC_CMD_ADD_TXSA, | |
2662 | .doit = macsec_add_txsa, | |
2663 | .policy = macsec_genl_policy, | |
2664 | .flags = GENL_ADMIN_PERM, | |
2665 | }, | |
2666 | { | |
2667 | .cmd = MACSEC_CMD_DEL_TXSA, | |
2668 | .doit = macsec_del_txsa, | |
2669 | .policy = macsec_genl_policy, | |
2670 | .flags = GENL_ADMIN_PERM, | |
2671 | }, | |
2672 | { | |
2673 | .cmd = MACSEC_CMD_UPD_TXSA, | |
2674 | .doit = macsec_upd_txsa, | |
2675 | .policy = macsec_genl_policy, | |
2676 | .flags = GENL_ADMIN_PERM, | |
2677 | }, | |
2678 | { | |
2679 | .cmd = MACSEC_CMD_ADD_RXSA, | |
2680 | .doit = macsec_add_rxsa, | |
2681 | .policy = macsec_genl_policy, | |
2682 | .flags = GENL_ADMIN_PERM, | |
2683 | }, | |
2684 | { | |
2685 | .cmd = MACSEC_CMD_DEL_RXSA, | |
2686 | .doit = macsec_del_rxsa, | |
2687 | .policy = macsec_genl_policy, | |
2688 | .flags = GENL_ADMIN_PERM, | |
2689 | }, | |
2690 | { | |
2691 | .cmd = MACSEC_CMD_UPD_RXSA, | |
2692 | .doit = macsec_upd_rxsa, | |
2693 | .policy = macsec_genl_policy, | |
2694 | .flags = GENL_ADMIN_PERM, | |
2695 | }, | |
2696 | }; | |
2697 | ||
56989f6d | 2698 | static struct genl_family macsec_fam __ro_after_init = { |
489111e5 JB |
2699 | .name = MACSEC_GENL_NAME, |
2700 | .hdrsize = 0, | |
2701 | .version = MACSEC_GENL_VERSION, | |
2702 | .maxattr = MACSEC_ATTR_MAX, | |
2703 | .netnsok = true, | |
2704 | .module = THIS_MODULE, | |
2705 | .ops = macsec_genl_ops, | |
2706 | .n_ops = ARRAY_SIZE(macsec_genl_ops), | |
2707 | }; | |
2708 | ||
c09440f7 SD |
2709 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
2710 | struct net_device *dev) | |
2711 | { | |
2712 | struct macsec_dev *macsec = netdev_priv(dev); | |
2713 | struct macsec_secy *secy = &macsec->secy; | |
2714 | struct pcpu_secy_stats *secy_stats; | |
2715 | int ret, len; | |
2716 | ||
2717 | /* 10.5 */ | |
2718 | if (!secy->protect_frames) { | |
2719 | secy_stats = this_cpu_ptr(macsec->stats); | |
2720 | u64_stats_update_begin(&secy_stats->syncp); | |
2721 | secy_stats->stats.OutPktsUntagged++; | |
2722 | u64_stats_update_end(&secy_stats->syncp); | |
79c62220 | 2723 | skb->dev = macsec->real_dev; |
c09440f7 SD |
2724 | len = skb->len; |
2725 | ret = dev_queue_xmit(skb); | |
2726 | count_tx(dev, ret, len); | |
2727 | return ret; | |
2728 | } | |
2729 | ||
2730 | if (!secy->operational) { | |
2731 | kfree_skb(skb); | |
2732 | dev->stats.tx_dropped++; | |
2733 | return NETDEV_TX_OK; | |
2734 | } | |
2735 | ||
2736 | skb = macsec_encrypt(skb, dev); | |
2737 | if (IS_ERR(skb)) { | |
2738 | if (PTR_ERR(skb) != -EINPROGRESS) | |
2739 | dev->stats.tx_dropped++; | |
2740 | return NETDEV_TX_OK; | |
2741 | } | |
2742 | ||
2743 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
2744 | ||
2745 | macsec_encrypt_finish(skb, dev); | |
2746 | len = skb->len; | |
2747 | ret = dev_queue_xmit(skb); | |
2748 | count_tx(dev, ret, len); | |
2749 | return ret; | |
2750 | } | |
2751 | ||
2752 | #define MACSEC_FEATURES \ | |
2753 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) | |
e2003872 SD |
2754 | static struct lock_class_key macsec_netdev_addr_lock_key; |
2755 | ||
c09440f7 SD |
2756 | static int macsec_dev_init(struct net_device *dev) |
2757 | { | |
2758 | struct macsec_dev *macsec = macsec_priv(dev); | |
2759 | struct net_device *real_dev = macsec->real_dev; | |
5491e7c6 | 2760 | int err; |
c09440f7 SD |
2761 | |
2762 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
2763 | if (!dev->tstats) | |
2764 | return -ENOMEM; | |
2765 | ||
5491e7c6 PA |
2766 | err = gro_cells_init(&macsec->gro_cells, dev); |
2767 | if (err) { | |
2768 | free_percpu(dev->tstats); | |
2769 | return err; | |
2770 | } | |
2771 | ||
c09440f7 SD |
2772 | dev->features = real_dev->features & MACSEC_FEATURES; |
2773 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
2774 | ||
2775 | dev->needed_headroom = real_dev->needed_headroom + | |
2776 | MACSEC_NEEDED_HEADROOM; | |
2777 | dev->needed_tailroom = real_dev->needed_tailroom + | |
2778 | MACSEC_NEEDED_TAILROOM; | |
2779 | ||
2780 | if (is_zero_ether_addr(dev->dev_addr)) | |
2781 | eth_hw_addr_inherit(dev, real_dev); | |
2782 | if (is_zero_ether_addr(dev->broadcast)) | |
2783 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
2784 | ||
2785 | return 0; | |
2786 | } | |
2787 | ||
2788 | static void macsec_dev_uninit(struct net_device *dev) | |
2789 | { | |
5491e7c6 PA |
2790 | struct macsec_dev *macsec = macsec_priv(dev); |
2791 | ||
2792 | gro_cells_destroy(&macsec->gro_cells); | |
c09440f7 SD |
2793 | free_percpu(dev->tstats); |
2794 | } | |
2795 | ||
2796 | static netdev_features_t macsec_fix_features(struct net_device *dev, | |
2797 | netdev_features_t features) | |
2798 | { | |
2799 | struct macsec_dev *macsec = macsec_priv(dev); | |
2800 | struct net_device *real_dev = macsec->real_dev; | |
2801 | ||
5491e7c6 PA |
2802 | features &= (real_dev->features & MACSEC_FEATURES) | |
2803 | NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; | |
2804 | features |= NETIF_F_LLTX; | |
c09440f7 SD |
2805 | |
2806 | return features; | |
2807 | } | |
2808 | ||
2809 | static int macsec_dev_open(struct net_device *dev) | |
2810 | { | |
2811 | struct macsec_dev *macsec = macsec_priv(dev); | |
2812 | struct net_device *real_dev = macsec->real_dev; | |
2813 | int err; | |
2814 | ||
2815 | if (!(real_dev->flags & IFF_UP)) | |
2816 | return -ENETDOWN; | |
2817 | ||
2818 | err = dev_uc_add(real_dev, dev->dev_addr); | |
2819 | if (err < 0) | |
2820 | return err; | |
2821 | ||
2822 | if (dev->flags & IFF_ALLMULTI) { | |
2823 | err = dev_set_allmulti(real_dev, 1); | |
2824 | if (err < 0) | |
2825 | goto del_unicast; | |
2826 | } | |
2827 | ||
2828 | if (dev->flags & IFF_PROMISC) { | |
2829 | err = dev_set_promiscuity(real_dev, 1); | |
2830 | if (err < 0) | |
2831 | goto clear_allmulti; | |
2832 | } | |
2833 | ||
2834 | if (netif_carrier_ok(real_dev)) | |
2835 | netif_carrier_on(dev); | |
2836 | ||
2837 | return 0; | |
2838 | clear_allmulti: | |
2839 | if (dev->flags & IFF_ALLMULTI) | |
2840 | dev_set_allmulti(real_dev, -1); | |
2841 | del_unicast: | |
2842 | dev_uc_del(real_dev, dev->dev_addr); | |
2843 | netif_carrier_off(dev); | |
2844 | return err; | |
2845 | } | |
2846 | ||
2847 | static int macsec_dev_stop(struct net_device *dev) | |
2848 | { | |
2849 | struct macsec_dev *macsec = macsec_priv(dev); | |
2850 | struct net_device *real_dev = macsec->real_dev; | |
2851 | ||
2852 | netif_carrier_off(dev); | |
2853 | ||
2854 | dev_mc_unsync(real_dev, dev); | |
2855 | dev_uc_unsync(real_dev, dev); | |
2856 | ||
2857 | if (dev->flags & IFF_ALLMULTI) | |
2858 | dev_set_allmulti(real_dev, -1); | |
2859 | ||
2860 | if (dev->flags & IFF_PROMISC) | |
2861 | dev_set_promiscuity(real_dev, -1); | |
2862 | ||
2863 | dev_uc_del(real_dev, dev->dev_addr); | |
2864 | ||
2865 | return 0; | |
2866 | } | |
2867 | ||
2868 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) | |
2869 | { | |
2870 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
2871 | ||
2872 | if (!(dev->flags & IFF_UP)) | |
2873 | return; | |
2874 | ||
2875 | if (change & IFF_ALLMULTI) | |
2876 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
2877 | ||
2878 | if (change & IFF_PROMISC) | |
2879 | dev_set_promiscuity(real_dev, | |
2880 | dev->flags & IFF_PROMISC ? 1 : -1); | |
2881 | } | |
2882 | ||
2883 | static void macsec_dev_set_rx_mode(struct net_device *dev) | |
2884 | { | |
2885 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
2886 | ||
2887 | dev_mc_sync(real_dev, dev); | |
2888 | dev_uc_sync(real_dev, dev); | |
2889 | } | |
2890 | ||
2891 | static int macsec_set_mac_address(struct net_device *dev, void *p) | |
2892 | { | |
2893 | struct macsec_dev *macsec = macsec_priv(dev); | |
2894 | struct net_device *real_dev = macsec->real_dev; | |
2895 | struct sockaddr *addr = p; | |
2896 | int err; | |
2897 | ||
2898 | if (!is_valid_ether_addr(addr->sa_data)) | |
2899 | return -EADDRNOTAVAIL; | |
2900 | ||
2901 | if (!(dev->flags & IFF_UP)) | |
2902 | goto out; | |
2903 | ||
2904 | err = dev_uc_add(real_dev, addr->sa_data); | |
2905 | if (err < 0) | |
2906 | return err; | |
2907 | ||
2908 | dev_uc_del(real_dev, dev->dev_addr); | |
2909 | ||
2910 | out: | |
2911 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
2912 | return 0; | |
2913 | } | |
2914 | ||
2915 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) | |
2916 | { | |
2917 | struct macsec_dev *macsec = macsec_priv(dev); | |
2918 | unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); | |
2919 | ||
2920 | if (macsec->real_dev->mtu - extra < new_mtu) | |
2921 | return -ERANGE; | |
2922 | ||
2923 | dev->mtu = new_mtu; | |
2924 | ||
2925 | return 0; | |
2926 | } | |
2927 | ||
bc1f4470 | 2928 | static void macsec_get_stats64(struct net_device *dev, |
2929 | struct rtnl_link_stats64 *s) | |
c09440f7 SD |
2930 | { |
2931 | int cpu; | |
2932 | ||
2933 | if (!dev->tstats) | |
bc1f4470 | 2934 | return; |
c09440f7 SD |
2935 | |
2936 | for_each_possible_cpu(cpu) { | |
2937 | struct pcpu_sw_netstats *stats; | |
2938 | struct pcpu_sw_netstats tmp; | |
2939 | int start; | |
2940 | ||
2941 | stats = per_cpu_ptr(dev->tstats, cpu); | |
2942 | do { | |
2943 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2944 | tmp.rx_packets = stats->rx_packets; | |
2945 | tmp.rx_bytes = stats->rx_bytes; | |
2946 | tmp.tx_packets = stats->tx_packets; | |
2947 | tmp.tx_bytes = stats->tx_bytes; | |
2948 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2949 | ||
2950 | s->rx_packets += tmp.rx_packets; | |
2951 | s->rx_bytes += tmp.rx_bytes; | |
2952 | s->tx_packets += tmp.tx_packets; | |
2953 | s->tx_bytes += tmp.tx_bytes; | |
2954 | } | |
2955 | ||
2956 | s->rx_dropped = dev->stats.rx_dropped; | |
2957 | s->tx_dropped = dev->stats.tx_dropped; | |
c09440f7 SD |
2958 | } |
2959 | ||
2960 | static int macsec_get_iflink(const struct net_device *dev) | |
2961 | { | |
2962 | return macsec_priv(dev)->real_dev->ifindex; | |
2963 | } | |
2964 | ||
e2003872 SD |
2965 | |
2966 | static int macsec_get_nest_level(struct net_device *dev) | |
2967 | { | |
2968 | return macsec_priv(dev)->nest_level; | |
2969 | } | |
2970 | ||
2971 | ||
c09440f7 SD |
2972 | static const struct net_device_ops macsec_netdev_ops = { |
2973 | .ndo_init = macsec_dev_init, | |
2974 | .ndo_uninit = macsec_dev_uninit, | |
2975 | .ndo_open = macsec_dev_open, | |
2976 | .ndo_stop = macsec_dev_stop, | |
2977 | .ndo_fix_features = macsec_fix_features, | |
2978 | .ndo_change_mtu = macsec_change_mtu, | |
2979 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, | |
2980 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, | |
2981 | .ndo_set_mac_address = macsec_set_mac_address, | |
2982 | .ndo_start_xmit = macsec_start_xmit, | |
2983 | .ndo_get_stats64 = macsec_get_stats64, | |
2984 | .ndo_get_iflink = macsec_get_iflink, | |
e2003872 | 2985 | .ndo_get_lock_subclass = macsec_get_nest_level, |
c09440f7 SD |
2986 | }; |
2987 | ||
2988 | static const struct device_type macsec_type = { | |
2989 | .name = "macsec", | |
2990 | }; | |
2991 | ||
2992 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { | |
2993 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, | |
2994 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, | |
2995 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, | |
2996 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, | |
2997 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, | |
2998 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, | |
2999 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, | |
3000 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, | |
3001 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, | |
3002 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, | |
3003 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, | |
3004 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, | |
3005 | }; | |
3006 | ||
3007 | static void macsec_free_netdev(struct net_device *dev) | |
3008 | { | |
3009 | struct macsec_dev *macsec = macsec_priv(dev); | |
3010 | struct net_device *real_dev = macsec->real_dev; | |
3011 | ||
3012 | free_percpu(macsec->stats); | |
3013 | free_percpu(macsec->secy.tx_sc.stats); | |
3014 | ||
3015 | dev_put(real_dev); | |
c09440f7 SD |
3016 | } |
3017 | ||
3018 | static void macsec_setup(struct net_device *dev) | |
3019 | { | |
3020 | ether_setup(dev); | |
91572088 JW |
3021 | dev->min_mtu = 0; |
3022 | dev->max_mtu = ETH_MAX_MTU; | |
e425974f | 3023 | dev->priv_flags |= IFF_NO_QUEUE; |
c09440f7 | 3024 | dev->netdev_ops = &macsec_netdev_ops; |
cf124db5 DM |
3025 | dev->needs_free_netdev = true; |
3026 | dev->priv_destructor = macsec_free_netdev; | |
c24acf03 | 3027 | SET_NETDEV_DEVTYPE(dev, &macsec_type); |
c09440f7 SD |
3028 | |
3029 | eth_zero_addr(dev->broadcast); | |
3030 | } | |
3031 | ||
ccfdec90 FW |
3032 | static int macsec_changelink_common(struct net_device *dev, |
3033 | struct nlattr *data[]) | |
c09440f7 SD |
3034 | { |
3035 | struct macsec_secy *secy; | |
3036 | struct macsec_tx_sc *tx_sc; | |
3037 | ||
3038 | secy = &macsec_priv(dev)->secy; | |
3039 | tx_sc = &secy->tx_sc; | |
3040 | ||
3041 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3042 | struct macsec_tx_sa *tx_sa; | |
3043 | ||
3044 | tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); | |
3045 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); | |
3046 | ||
3047 | secy->operational = tx_sa && tx_sa->active; | |
3048 | } | |
3049 | ||
3050 | if (data[IFLA_MACSEC_WINDOW]) | |
3051 | secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); | |
3052 | ||
3053 | if (data[IFLA_MACSEC_ENCRYPT]) | |
3054 | tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); | |
3055 | ||
3056 | if (data[IFLA_MACSEC_PROTECT]) | |
3057 | secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); | |
3058 | ||
3059 | if (data[IFLA_MACSEC_INC_SCI]) | |
3060 | tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
3061 | ||
3062 | if (data[IFLA_MACSEC_ES]) | |
3063 | tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); | |
3064 | ||
3065 | if (data[IFLA_MACSEC_SCB]) | |
3066 | tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); | |
3067 | ||
3068 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) | |
3069 | secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); | |
3070 | ||
3071 | if (data[IFLA_MACSEC_VALIDATION]) | |
3072 | secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); | |
ccfdec90 FW |
3073 | |
3074 | if (data[IFLA_MACSEC_CIPHER_SUITE]) { | |
3075 | switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) { | |
3076 | case MACSEC_CIPHER_ID_GCM_AES_128: | |
e8660ded | 3077 | case MACSEC_DEFAULT_CIPHER_ID: |
ccfdec90 FW |
3078 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
3079 | break; | |
3080 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
3081 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
3082 | break; | |
3083 | default: | |
3084 | return -EINVAL; | |
3085 | } | |
3086 | } | |
3087 | ||
3088 | return 0; | |
c09440f7 SD |
3089 | } |
3090 | ||
3091 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
3092 | struct nlattr *data[], |
3093 | struct netlink_ext_ack *extack) | |
c09440f7 SD |
3094 | { |
3095 | if (!data) | |
3096 | return 0; | |
3097 | ||
3098 | if (data[IFLA_MACSEC_CIPHER_SUITE] || | |
3099 | data[IFLA_MACSEC_ICV_LEN] || | |
3100 | data[IFLA_MACSEC_SCI] || | |
3101 | data[IFLA_MACSEC_PORT]) | |
3102 | return -EINVAL; | |
3103 | ||
ccfdec90 | 3104 | return macsec_changelink_common(dev, data); |
c09440f7 SD |
3105 | } |
3106 | ||
3107 | static void macsec_del_dev(struct macsec_dev *macsec) | |
3108 | { | |
3109 | int i; | |
3110 | ||
3111 | while (macsec->secy.rx_sc) { | |
3112 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); | |
3113 | ||
3114 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); | |
3115 | free_rx_sc(rx_sc); | |
3116 | } | |
3117 | ||
3118 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
3119 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); | |
3120 | ||
3121 | if (sa) { | |
3122 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); | |
3123 | clear_tx_sa(sa); | |
3124 | } | |
3125 | } | |
3126 | } | |
3127 | ||
bbe11fab SD |
3128 | static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
3129 | { | |
3130 | struct macsec_dev *macsec = macsec_priv(dev); | |
e2003872 | 3131 | struct net_device *real_dev = macsec->real_dev; |
bbe11fab SD |
3132 | |
3133 | unregister_netdevice_queue(dev, head); | |
3134 | list_del_rcu(&macsec->secys); | |
3135 | macsec_del_dev(macsec); | |
e2003872 | 3136 | netdev_upper_dev_unlink(real_dev, dev); |
bbe11fab SD |
3137 | |
3138 | macsec_generation++; | |
3139 | } | |
3140 | ||
c09440f7 SD |
3141 | static void macsec_dellink(struct net_device *dev, struct list_head *head) |
3142 | { | |
3143 | struct macsec_dev *macsec = macsec_priv(dev); | |
3144 | struct net_device *real_dev = macsec->real_dev; | |
3145 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3146 | ||
bbe11fab | 3147 | macsec_common_dellink(dev, head); |
96cfc505 | 3148 | |
960d5848 | 3149 | if (list_empty(&rxd->secys)) { |
c09440f7 | 3150 | netdev_rx_handler_unregister(real_dev); |
960d5848 SD |
3151 | kfree(rxd); |
3152 | } | |
c09440f7 SD |
3153 | } |
3154 | ||
3155 | static int register_macsec_dev(struct net_device *real_dev, | |
3156 | struct net_device *dev) | |
3157 | { | |
3158 | struct macsec_dev *macsec = macsec_priv(dev); | |
3159 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3160 | ||
3161 | if (!rxd) { | |
3162 | int err; | |
3163 | ||
3164 | rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); | |
3165 | if (!rxd) | |
3166 | return -ENOMEM; | |
3167 | ||
3168 | INIT_LIST_HEAD(&rxd->secys); | |
3169 | ||
3170 | err = netdev_rx_handler_register(real_dev, macsec_handle_frame, | |
3171 | rxd); | |
960d5848 SD |
3172 | if (err < 0) { |
3173 | kfree(rxd); | |
c09440f7 | 3174 | return err; |
960d5848 | 3175 | } |
c09440f7 SD |
3176 | } |
3177 | ||
3178 | list_add_tail_rcu(&macsec->secys, &rxd->secys); | |
3179 | return 0; | |
3180 | } | |
3181 | ||
3182 | static bool sci_exists(struct net_device *dev, sci_t sci) | |
3183 | { | |
3184 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); | |
3185 | struct macsec_dev *macsec; | |
3186 | ||
3187 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
3188 | if (macsec->secy.sci == sci) | |
3189 | return true; | |
3190 | } | |
3191 | ||
3192 | return false; | |
3193 | } | |
3194 | ||
3195 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) | |
3196 | { | |
3197 | return make_sci(dev->dev_addr, port); | |
3198 | } | |
3199 | ||
3200 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) | |
3201 | { | |
3202 | struct macsec_dev *macsec = macsec_priv(dev); | |
3203 | struct macsec_secy *secy = &macsec->secy; | |
3204 | ||
3205 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); | |
3206 | if (!macsec->stats) | |
3207 | return -ENOMEM; | |
3208 | ||
3209 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); | |
3210 | if (!secy->tx_sc.stats) { | |
3211 | free_percpu(macsec->stats); | |
3212 | return -ENOMEM; | |
3213 | } | |
3214 | ||
3215 | if (sci == MACSEC_UNDEF_SCI) | |
3216 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3217 | ||
3218 | secy->netdev = dev; | |
3219 | secy->operational = true; | |
3220 | secy->key_len = DEFAULT_SAK_LEN; | |
3221 | secy->icv_len = icv_len; | |
3222 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; | |
3223 | secy->protect_frames = true; | |
3224 | secy->replay_protect = false; | |
3225 | ||
3226 | secy->sci = sci; | |
3227 | secy->tx_sc.active = true; | |
3228 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; | |
3229 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; | |
3230 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; | |
3231 | secy->tx_sc.end_station = false; | |
3232 | secy->tx_sc.scb = false; | |
3233 | ||
3234 | return 0; | |
3235 | } | |
3236 | ||
3237 | static int macsec_newlink(struct net *net, struct net_device *dev, | |
7a3f4a18 MS |
3238 | struct nlattr *tb[], struct nlattr *data[], |
3239 | struct netlink_ext_ack *extack) | |
c09440f7 SD |
3240 | { |
3241 | struct macsec_dev *macsec = macsec_priv(dev); | |
3242 | struct net_device *real_dev; | |
3243 | int err; | |
3244 | sci_t sci; | |
3245 | u8 icv_len = DEFAULT_ICV_LEN; | |
3246 | rx_handler_func_t *rx_handler; | |
3247 | ||
3248 | if (!tb[IFLA_LINK]) | |
3249 | return -EINVAL; | |
3250 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
3251 | if (!real_dev) | |
3252 | return -ENODEV; | |
3253 | ||
3254 | dev->priv_flags |= IFF_MACSEC; | |
3255 | ||
3256 | macsec->real_dev = real_dev; | |
3257 | ||
3258 | if (data && data[IFLA_MACSEC_ICV_LEN]) | |
3259 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
3260 | dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true); | |
3261 | ||
3262 | rx_handler = rtnl_dereference(real_dev->rx_handler); | |
3263 | if (rx_handler && rx_handler != macsec_handle_frame) | |
3264 | return -EBUSY; | |
3265 | ||
3266 | err = register_netdevice(dev); | |
3267 | if (err < 0) | |
3268 | return err; | |
3269 | ||
0759e552 SD |
3270 | dev_hold(real_dev); |
3271 | ||
952fcfd0 | 3272 | macsec->nest_level = dev_get_nest_level(real_dev) + 1; |
e2003872 SD |
3273 | netdev_lockdep_set_classes(dev); |
3274 | lockdep_set_class_and_subclass(&dev->addr_list_lock, | |
3275 | &macsec_netdev_addr_lock_key, | |
3276 | macsec_get_nest_level(dev)); | |
3277 | ||
42ab19ee | 3278 | err = netdev_upper_dev_link(real_dev, dev, extack); |
e2003872 | 3279 | if (err < 0) |
bd28899d | 3280 | goto unregister; |
e2003872 | 3281 | |
c09440f7 SD |
3282 | /* need to be already registered so that ->init has run and |
3283 | * the MAC addr is set | |
3284 | */ | |
3285 | if (data && data[IFLA_MACSEC_SCI]) | |
3286 | sci = nla_get_sci(data[IFLA_MACSEC_SCI]); | |
3287 | else if (data && data[IFLA_MACSEC_PORT]) | |
3288 | sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); | |
3289 | else | |
3290 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3291 | ||
3292 | if (rx_handler && sci_exists(real_dev, sci)) { | |
3293 | err = -EBUSY; | |
e2003872 | 3294 | goto unlink; |
c09440f7 SD |
3295 | } |
3296 | ||
3297 | err = macsec_add_dev(dev, sci, icv_len); | |
3298 | if (err) | |
e2003872 | 3299 | goto unlink; |
c09440f7 | 3300 | |
ccfdec90 FW |
3301 | if (data) { |
3302 | err = macsec_changelink_common(dev, data); | |
3303 | if (err) | |
3304 | goto del_dev; | |
3305 | } | |
c09440f7 SD |
3306 | |
3307 | err = register_macsec_dev(real_dev, dev); | |
3308 | if (err < 0) | |
3309 | goto del_dev; | |
3310 | ||
96cfc505 SD |
3311 | macsec_generation++; |
3312 | ||
c09440f7 SD |
3313 | return 0; |
3314 | ||
3315 | del_dev: | |
3316 | macsec_del_dev(macsec); | |
e2003872 SD |
3317 | unlink: |
3318 | netdev_upper_dev_unlink(real_dev, dev); | |
bd28899d | 3319 | unregister: |
c09440f7 SD |
3320 | unregister_netdevice(dev); |
3321 | return err; | |
3322 | } | |
3323 | ||
a8b8a889 MS |
3324 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[], |
3325 | struct netlink_ext_ack *extack) | |
c09440f7 | 3326 | { |
74816480 | 3327 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
c09440f7 SD |
3328 | u8 icv_len = DEFAULT_ICV_LEN; |
3329 | int flag; | |
3330 | bool es, scb, sci; | |
3331 | ||
3332 | if (!data) | |
3333 | return 0; | |
3334 | ||
3335 | if (data[IFLA_MACSEC_CIPHER_SUITE]) | |
3336 | csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); | |
3337 | ||
f04c392d | 3338 | if (data[IFLA_MACSEC_ICV_LEN]) { |
c09440f7 | 3339 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
f04c392d DC |
3340 | if (icv_len != DEFAULT_ICV_LEN) { |
3341 | char dummy_key[DEFAULT_SAK_LEN] = { 0 }; | |
3342 | struct crypto_aead *dummy_tfm; | |
3343 | ||
3344 | dummy_tfm = macsec_alloc_tfm(dummy_key, | |
3345 | DEFAULT_SAK_LEN, | |
3346 | icv_len); | |
3347 | if (IS_ERR(dummy_tfm)) | |
3348 | return PTR_ERR(dummy_tfm); | |
3349 | crypto_free_aead(dummy_tfm); | |
3350 | } | |
3351 | } | |
c09440f7 SD |
3352 | |
3353 | switch (csid) { | |
ccfdec90 FW |
3354 | case MACSEC_CIPHER_ID_GCM_AES_128: |
3355 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
e8660ded | 3356 | case MACSEC_DEFAULT_CIPHER_ID: |
c09440f7 | 3357 | if (icv_len < MACSEC_MIN_ICV_LEN || |
2ccbe2cb | 3358 | icv_len > MACSEC_STD_ICV_LEN) |
c09440f7 SD |
3359 | return -EINVAL; |
3360 | break; | |
3361 | default: | |
3362 | return -EINVAL; | |
3363 | } | |
3364 | ||
3365 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3366 | if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) | |
3367 | return -EINVAL; | |
3368 | } | |
3369 | ||
3370 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; | |
3371 | flag < IFLA_MACSEC_VALIDATION; | |
3372 | flag++) { | |
3373 | if (data[flag]) { | |
3374 | if (nla_get_u8(data[flag]) > 1) | |
3375 | return -EINVAL; | |
3376 | } | |
3377 | } | |
3378 | ||
3379 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; | |
3380 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; | |
3381 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; | |
3382 | ||
3383 | if ((sci && (scb || es)) || (scb && es)) | |
3384 | return -EINVAL; | |
3385 | ||
3386 | if (data[IFLA_MACSEC_VALIDATION] && | |
3387 | nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) | |
3388 | return -EINVAL; | |
3389 | ||
4b1fb935 SD |
3390 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
3391 | nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && | |
c09440f7 SD |
3392 | !data[IFLA_MACSEC_WINDOW]) |
3393 | return -EINVAL; | |
3394 | ||
3395 | return 0; | |
3396 | } | |
3397 | ||
3398 | static struct net *macsec_get_link_net(const struct net_device *dev) | |
3399 | { | |
3400 | return dev_net(macsec_priv(dev)->real_dev); | |
3401 | } | |
3402 | ||
3403 | static size_t macsec_get_size(const struct net_device *dev) | |
3404 | { | |
c9fba3ed ZS |
3405 | return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */ |
3406 | nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */ | |
3407 | nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */ | |
3408 | nla_total_size(4) + /* IFLA_MACSEC_WINDOW */ | |
3409 | nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */ | |
3410 | nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */ | |
3411 | nla_total_size(1) + /* IFLA_MACSEC_PROTECT */ | |
3412 | nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */ | |
3413 | nla_total_size(1) + /* IFLA_MACSEC_ES */ | |
3414 | nla_total_size(1) + /* IFLA_MACSEC_SCB */ | |
3415 | nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */ | |
3416 | nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */ | |
c09440f7 SD |
3417 | 0; |
3418 | } | |
3419 | ||
3420 | static int macsec_fill_info(struct sk_buff *skb, | |
3421 | const struct net_device *dev) | |
3422 | { | |
3423 | struct macsec_secy *secy = &macsec_priv(dev)->secy; | |
3424 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ccfdec90 FW |
3425 | u64 csid; |
3426 | ||
3427 | switch (secy->key_len) { | |
3428 | case MACSEC_GCM_AES_128_SAK_LEN: | |
e8660ded | 3429 | csid = MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
3430 | break; |
3431 | case MACSEC_GCM_AES_256_SAK_LEN: | |
3432 | csid = MACSEC_CIPHER_ID_GCM_AES_256; | |
3433 | break; | |
3434 | default: | |
3435 | goto nla_put_failure; | |
3436 | } | |
c09440f7 | 3437 | |
f60d94c0 ND |
3438 | if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
3439 | IFLA_MACSEC_PAD) || | |
c09440f7 | 3440 | nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
f60d94c0 | 3441 | nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
ccfdec90 | 3442 | csid, IFLA_MACSEC_PAD) || |
c09440f7 SD |
3443 | nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
3444 | nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || | |
3445 | nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || | |
3446 | nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || | |
3447 | nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || | |
3448 | nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || | |
3449 | nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || | |
3450 | nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || | |
3451 | 0) | |
3452 | goto nla_put_failure; | |
3453 | ||
3454 | if (secy->replay_protect) { | |
3455 | if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) | |
3456 | goto nla_put_failure; | |
3457 | } | |
3458 | ||
3459 | return 0; | |
3460 | ||
3461 | nla_put_failure: | |
3462 | return -EMSGSIZE; | |
3463 | } | |
3464 | ||
3465 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { | |
3466 | .kind = "macsec", | |
3467 | .priv_size = sizeof(struct macsec_dev), | |
3468 | .maxtype = IFLA_MACSEC_MAX, | |
3469 | .policy = macsec_rtnl_policy, | |
3470 | .setup = macsec_setup, | |
3471 | .validate = macsec_validate_attr, | |
3472 | .newlink = macsec_newlink, | |
3473 | .changelink = macsec_changelink, | |
3474 | .dellink = macsec_dellink, | |
3475 | .get_size = macsec_get_size, | |
3476 | .fill_info = macsec_fill_info, | |
3477 | .get_link_net = macsec_get_link_net, | |
3478 | }; | |
3479 | ||
3480 | static bool is_macsec_master(struct net_device *dev) | |
3481 | { | |
3482 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; | |
3483 | } | |
3484 | ||
3485 | static int macsec_notify(struct notifier_block *this, unsigned long event, | |
3486 | void *ptr) | |
3487 | { | |
3488 | struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); | |
3489 | LIST_HEAD(head); | |
3490 | ||
3491 | if (!is_macsec_master(real_dev)) | |
3492 | return NOTIFY_DONE; | |
3493 | ||
3494 | switch (event) { | |
3495 | case NETDEV_UNREGISTER: { | |
3496 | struct macsec_dev *m, *n; | |
3497 | struct macsec_rxh_data *rxd; | |
3498 | ||
3499 | rxd = macsec_data_rtnl(real_dev); | |
3500 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
bbe11fab | 3501 | macsec_common_dellink(m->secy.netdev, &head); |
c09440f7 | 3502 | } |
bbe11fab SD |
3503 | |
3504 | netdev_rx_handler_unregister(real_dev); | |
3505 | kfree(rxd); | |
3506 | ||
c09440f7 SD |
3507 | unregister_netdevice_many(&head); |
3508 | break; | |
3509 | } | |
3510 | case NETDEV_CHANGEMTU: { | |
3511 | struct macsec_dev *m; | |
3512 | struct macsec_rxh_data *rxd; | |
3513 | ||
3514 | rxd = macsec_data_rtnl(real_dev); | |
3515 | list_for_each_entry(m, &rxd->secys, secys) { | |
3516 | struct net_device *dev = m->secy.netdev; | |
3517 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + | |
3518 | macsec_extra_len(true)); | |
3519 | ||
3520 | if (dev->mtu > mtu) | |
3521 | dev_set_mtu(dev, mtu); | |
3522 | } | |
3523 | } | |
3524 | } | |
3525 | ||
3526 | return NOTIFY_OK; | |
3527 | } | |
3528 | ||
3529 | static struct notifier_block macsec_notifier = { | |
3530 | .notifier_call = macsec_notify, | |
3531 | }; | |
3532 | ||
3533 | static int __init macsec_init(void) | |
3534 | { | |
3535 | int err; | |
3536 | ||
3537 | pr_info("MACsec IEEE 802.1AE\n"); | |
3538 | err = register_netdevice_notifier(&macsec_notifier); | |
3539 | if (err) | |
3540 | return err; | |
3541 | ||
3542 | err = rtnl_link_register(&macsec_link_ops); | |
3543 | if (err) | |
3544 | goto notifier; | |
3545 | ||
489111e5 | 3546 | err = genl_register_family(&macsec_fam); |
c09440f7 SD |
3547 | if (err) |
3548 | goto rtnl; | |
3549 | ||
3550 | return 0; | |
3551 | ||
3552 | rtnl: | |
3553 | rtnl_link_unregister(&macsec_link_ops); | |
3554 | notifier: | |
3555 | unregister_netdevice_notifier(&macsec_notifier); | |
3556 | return err; | |
3557 | } | |
3558 | ||
3559 | static void __exit macsec_exit(void) | |
3560 | { | |
3561 | genl_unregister_family(&macsec_fam); | |
3562 | rtnl_link_unregister(&macsec_link_ops); | |
3563 | unregister_netdevice_notifier(&macsec_notifier); | |
b196c22a | 3564 | rcu_barrier(); |
c09440f7 SD |
3565 | } |
3566 | ||
3567 | module_init(macsec_init); | |
3568 | module_exit(macsec_exit); | |
3569 | ||
3570 | MODULE_ALIAS_RTNL_LINK("macsec"); | |
78362998 | 3571 | MODULE_ALIAS_GENL_FAMILY("macsec"); |
c09440f7 SD |
3572 | |
3573 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); | |
3574 | MODULE_LICENSE("GPL v2"); |