1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * drivers/net/macsec.c - MACsec device |
4 | * |
5 | * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net> |
6 | */ |
7 | |
8 | #include <linux/types.h> |
9 | #include <linux/skbuff.h> |
10 | #include <linux/socket.h> |
11 | #include <linux/module.h> |
12 | #include <crypto/aead.h> |
13 | #include <linux/etherdevice.h> |
14 | #include <linux/netdevice.h> |
15 | #include <linux/rtnetlink.h> |
16 | #include <linux/refcount.h> |
17 | #include <net/genetlink.h> |
18 | #include <net/sock.h> |
19 | #include <net/gro_cells.h> |
20 | #include <net/macsec.h> |
21 | #include <net/dst_metadata.h> |
22 | #include <linux/phy.h> |
23 | #include <linux/byteorder/generic.h> |
24 | #include <linux/if_arp.h> |
25 | |
26 | #include <uapi/linux/if_macsec.h> |
27 | |
28 | /* SecTAG length = macsec_eth_header without the optional SCI */ |
29 | #define MACSEC_TAG_LEN 6 |
30 | |
31 | struct { |
32 | struct ethhdr ; |
33 | /* SecTAG */ |
34 | u8 ; |
35 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
36 | u8 :6, |
37 | :2; |
38 | #elif defined(__BIG_ENDIAN_BITFIELD) |
39 | u8 unused:2, |
40 | short_length:6; |
41 | #else |
42 | #error "Please fix <asm/byteorder.h>" |
43 | #endif |
44 | __be32 ; |
45 | u8 [8]; /* optional */ |
46 | } __packed; |
47 | |
48 | /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */ |
49 | #define MIN_NON_SHORT_LEN 48 |
50 | |
51 | #define GCM_AES_IV_LEN 12 |
52 | |
53 | #define for_each_rxsc(secy, sc) \ |
54 | for (sc = rcu_dereference_bh(secy->rx_sc); \ |
55 | sc; \ |
56 | sc = rcu_dereference_bh(sc->next)) |
57 | #define for_each_rxsc_rtnl(secy, sc) \ |
58 | for (sc = rtnl_dereference(secy->rx_sc); \ |
59 | sc; \ |
60 | sc = rtnl_dereference(sc->next)) |
61 | |
62 | #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31))) |
63 | |
64 | struct gcm_iv_xpn { |
65 | union { |
66 | u8 short_secure_channel_id[4]; |
67 | ssci_t ssci; |
68 | }; |
69 | __be64 pn; |
70 | } __packed; |
71 | |
72 | struct gcm_iv { |
73 | union { |
74 | u8 secure_channel_id[8]; |
75 | sci_t sci; |
76 | }; |
77 | __be32 pn; |
78 | }; |
79 | |
80 | #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT |
81 | |
82 | struct pcpu_secy_stats { |
83 | struct macsec_dev_stats stats; |
84 | struct u64_stats_sync syncp; |
85 | }; |
86 | |
87 | /** |
88 | * struct macsec_dev - private data |
89 | * @secy: SecY config |
90 | * @real_dev: pointer to underlying netdevice |
91 | * @dev_tracker: refcount tracker for @real_dev reference |
92 | * @stats: MACsec device stats |
93 | * @secys: linked list of SecY's on the underlying device |
94 | * @gro_cells: pointer to the Generic Receive Offload cell |
95 | * @offload: status of offloading on the MACsec device |
96 | */ |
97 | struct macsec_dev { |
98 | struct macsec_secy secy; |
99 | struct net_device *real_dev; |
100 | netdevice_tracker dev_tracker; |
101 | struct pcpu_secy_stats __percpu *stats; |
102 | struct list_head secys; |
103 | struct gro_cells gro_cells; |
104 | enum macsec_offload offload; |
105 | }; |
106 | |
107 | /** |
108 | * struct macsec_rxh_data - rx_handler private argument |
109 | * @secys: linked list of SecY's on this underlying device |
110 | */ |
111 | struct macsec_rxh_data { |
112 | struct list_head secys; |
113 | }; |
114 | |
115 | static struct macsec_dev *macsec_priv(const struct net_device *dev) |
116 | { |
117 | return (struct macsec_dev *)netdev_priv(dev); |
118 | } |
119 | |
120 | static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) |
121 | { |
122 | return rcu_dereference_bh(dev->rx_handler_data); |
123 | } |
124 | |
125 | static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) |
126 | { |
127 | return rtnl_dereference(dev->rx_handler_data); |
128 | } |
129 | |
130 | struct macsec_cb { |
131 | struct aead_request *req; |
132 | union { |
133 | struct macsec_tx_sa *tx_sa; |
134 | struct macsec_rx_sa *rx_sa; |
135 | }; |
136 | u8 assoc_num; |
137 | bool valid; |
138 | bool has_sci; |
139 | }; |
140 | |
141 | static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) |
142 | { |
143 | struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); |
144 | |
145 | if (!sa || !sa->active) |
146 | return NULL; |
147 | |
148 | if (!refcount_inc_not_zero(r: &sa->refcnt)) |
149 | return NULL; |
150 | |
151 | return sa; |
152 | } |
153 | |
154 | static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc) |
155 | { |
156 | struct macsec_rx_sa *sa = NULL; |
157 | int an; |
158 | |
159 | for (an = 0; an < MACSEC_NUM_AN; an++) { |
160 | sa = macsec_rxsa_get(ptr: rx_sc->sa[an]); |
161 | if (sa) |
162 | break; |
163 | } |
164 | return sa; |
165 | } |
166 | |
167 | static void free_rx_sc_rcu(struct rcu_head *head) |
168 | { |
169 | struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); |
170 | |
171 | free_percpu(pdata: rx_sc->stats); |
172 | kfree(objp: rx_sc); |
173 | } |
174 | |
175 | static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) |
176 | { |
177 | return refcount_inc_not_zero(r: &sc->refcnt) ? sc : NULL; |
178 | } |
179 | |
180 | static void macsec_rxsc_put(struct macsec_rx_sc *sc) |
181 | { |
182 | if (refcount_dec_and_test(r: &sc->refcnt)) |
183 | call_rcu(head: &sc->rcu_head, func: free_rx_sc_rcu); |
184 | } |
185 | |
186 | static void free_rxsa(struct rcu_head *head) |
187 | { |
188 | struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); |
189 | |
190 | crypto_free_aead(tfm: sa->key.tfm); |
191 | free_percpu(pdata: sa->stats); |
192 | kfree(objp: sa); |
193 | } |
194 | |
195 | static void macsec_rxsa_put(struct macsec_rx_sa *sa) |
196 | { |
197 | if (refcount_dec_and_test(r: &sa->refcnt)) |
198 | call_rcu(head: &sa->rcu, func: free_rxsa); |
199 | } |
200 | |
201 | static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) |
202 | { |
203 | struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); |
204 | |
205 | if (!sa || !sa->active) |
206 | return NULL; |
207 | |
208 | if (!refcount_inc_not_zero(r: &sa->refcnt)) |
209 | return NULL; |
210 | |
211 | return sa; |
212 | } |
213 | |
214 | static void free_txsa(struct rcu_head *head) |
215 | { |
216 | struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); |
217 | |
218 | crypto_free_aead(tfm: sa->key.tfm); |
219 | free_percpu(pdata: sa->stats); |
220 | kfree(objp: sa); |
221 | } |
222 | |
223 | static void macsec_txsa_put(struct macsec_tx_sa *sa) |
224 | { |
225 | if (refcount_dec_and_test(r: &sa->refcnt)) |
226 | call_rcu(head: &sa->rcu, func: free_txsa); |
227 | } |
228 | |
229 | static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) |
230 | { |
231 | BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); |
232 | return (struct macsec_cb *)skb->cb; |
233 | } |
234 | |
235 | #define MACSEC_PORT_SCB (0x0000) |
236 | #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) |
237 | #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff) |
238 | |
239 | #define MACSEC_GCM_AES_128_SAK_LEN 16 |
240 | #define MACSEC_GCM_AES_256_SAK_LEN 32 |
241 | |
242 | #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN |
243 | #define DEFAULT_XPN false |
244 | #define DEFAULT_SEND_SCI true |
245 | #define DEFAULT_ENCRYPT false |
246 | #define DEFAULT_ENCODING_SA 0 |
247 | #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1)) |
248 | |
249 | static sci_t make_sci(const u8 *addr, __be16 port) |
250 | { |
251 | sci_t sci; |
252 | |
253 | memcpy(&sci, addr, ETH_ALEN); |
254 | memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port)); |
255 | |
256 | return sci; |
257 | } |
258 | |
259 | static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present) |
260 | { |
261 | sci_t sci; |
262 | |
263 | if (sci_present) |
264 | memcpy(&sci, hdr->secure_channel_id, |
265 | sizeof(hdr->secure_channel_id)); |
266 | else |
267 | sci = make_sci(addr: hdr->eth.h_source, MACSEC_PORT_ES); |
268 | |
269 | return sci; |
270 | } |
271 | |
272 | static unsigned int macsec_sectag_len(bool sci_present) |
273 | { |
274 | return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0); |
275 | } |
276 | |
277 | static unsigned int macsec_hdr_len(bool sci_present) |
278 | { |
279 | return macsec_sectag_len(sci_present) + ETH_HLEN; |
280 | } |
281 | |
282 | static unsigned int (bool sci_present) |
283 | { |
284 | return macsec_sectag_len(sci_present) + sizeof(__be16); |
285 | } |
286 | |
287 | /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */ |
288 | static void macsec_fill_sectag(struct macsec_eth_header *h, |
289 | const struct macsec_secy *secy, u32 pn, |
290 | bool sci_present) |
291 | { |
292 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
293 | |
294 | memset(&h->tci_an, 0, macsec_sectag_len(sci_present)); |
295 | h->eth.h_proto = htons(ETH_P_MACSEC); |
296 | |
297 | if (sci_present) { |
298 | h->tci_an |= MACSEC_TCI_SC; |
299 | memcpy(&h->secure_channel_id, &secy->sci, |
300 | sizeof(h->secure_channel_id)); |
301 | } else { |
302 | if (tx_sc->end_station) |
303 | h->tci_an |= MACSEC_TCI_ES; |
304 | if (tx_sc->scb) |
305 | h->tci_an |= MACSEC_TCI_SCB; |
306 | } |
307 | |
308 | h->packet_number = htonl(pn); |
309 | |
310 | /* with GCM, C/E clear for !encrypt, both set for encrypt */ |
311 | if (tx_sc->encrypt) |
312 | h->tci_an |= MACSEC_TCI_CONFID; |
313 | else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN) |
314 | h->tci_an |= MACSEC_TCI_C; |
315 | |
316 | h->tci_an |= tx_sc->encoding_sa; |
317 | } |
318 | |
319 | static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len) |
320 | { |
321 | if (data_len < MIN_NON_SHORT_LEN) |
322 | h->short_length = data_len; |
323 | } |
324 | |
325 | /* Checks if a MACsec interface is being offloaded to an hardware engine */ |
326 | static bool macsec_is_offloaded(struct macsec_dev *macsec) |
327 | { |
328 | if (macsec->offload == MACSEC_OFFLOAD_MAC || |
329 | macsec->offload == MACSEC_OFFLOAD_PHY) |
330 | return true; |
331 | |
332 | return false; |
333 | } |
334 | |
335 | /* Checks if underlying layers implement MACsec offloading functions. */ |
336 | static bool macsec_check_offload(enum macsec_offload offload, |
337 | struct macsec_dev *macsec) |
338 | { |
339 | if (!macsec || !macsec->real_dev) |
340 | return false; |
341 | |
342 | if (offload == MACSEC_OFFLOAD_PHY) |
343 | return macsec->real_dev->phydev && |
344 | macsec->real_dev->phydev->macsec_ops; |
345 | else if (offload == MACSEC_OFFLOAD_MAC) |
346 | return macsec->real_dev->features & NETIF_F_HW_MACSEC && |
347 | macsec->real_dev->macsec_ops; |
348 | |
349 | return false; |
350 | } |
351 | |
352 | static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload, |
353 | struct macsec_dev *macsec, |
354 | struct macsec_context *ctx) |
355 | { |
356 | if (ctx) { |
357 | memset(ctx, 0, sizeof(*ctx)); |
358 | ctx->offload = offload; |
359 | |
360 | if (offload == MACSEC_OFFLOAD_PHY) |
361 | ctx->phydev = macsec->real_dev->phydev; |
362 | else if (offload == MACSEC_OFFLOAD_MAC) |
363 | ctx->netdev = macsec->real_dev; |
364 | } |
365 | |
366 | if (offload == MACSEC_OFFLOAD_PHY) |
367 | return macsec->real_dev->phydev->macsec_ops; |
368 | else |
369 | return macsec->real_dev->macsec_ops; |
370 | } |
371 | |
372 | /* Returns a pointer to the MACsec ops struct if any and updates the MACsec |
373 | * context device reference if provided. |
374 | */ |
375 | static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec, |
376 | struct macsec_context *ctx) |
377 | { |
378 | if (!macsec_check_offload(offload: macsec->offload, macsec)) |
379 | return NULL; |
380 | |
381 | return __macsec_get_ops(offload: macsec->offload, macsec, ctx); |
382 | } |
383 | |
384 | /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */ |
385 | static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn) |
386 | { |
387 | struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data; |
388 | int len = skb->len - 2 * ETH_ALEN; |
389 | int = macsec_extra_len(sci_present: !!(h->tci_an & MACSEC_TCI_SC)) + icv_len; |
390 | |
391 | /* a) It comprises at least 17 octets */ |
392 | if (skb->len <= 16) |
393 | return false; |
394 | |
395 | /* b) MACsec EtherType: already checked */ |
396 | |
397 | /* c) V bit is clear */ |
398 | if (h->tci_an & MACSEC_TCI_VERSION) |
399 | return false; |
400 | |
401 | /* d) ES or SCB => !SC */ |
402 | if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) && |
403 | (h->tci_an & MACSEC_TCI_SC)) |
404 | return false; |
405 | |
406 | /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */ |
407 | if (h->unused) |
408 | return false; |
409 | |
410 | /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */ |
411 | if (!h->packet_number && !xpn) |
412 | return false; |
413 | |
414 | /* length check, f) g) h) i) */ |
415 | if (h->short_length) |
416 | return len == extra_len + h->short_length; |
417 | return len >= extra_len + MIN_NON_SHORT_LEN; |
418 | } |
419 | |
420 | #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true)) |
421 | #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN |
422 | |
423 | static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn, |
424 | salt_t salt) |
425 | { |
426 | struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv; |
427 | |
428 | gcm_iv->ssci = ssci ^ salt.ssci; |
429 | gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn; |
430 | } |
431 | |
432 | static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn) |
433 | { |
434 | struct gcm_iv *gcm_iv = (struct gcm_iv *)iv; |
435 | |
436 | gcm_iv->sci = sci; |
437 | gcm_iv->pn = htonl(pn); |
438 | } |
439 | |
440 | static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) |
441 | { |
442 | return (struct macsec_eth_header *)skb_mac_header(skb); |
443 | } |
444 | |
445 | static void __macsec_pn_wrapped(struct macsec_secy *secy, |
446 | struct macsec_tx_sa *tx_sa) |
447 | { |
448 | pr_debug("PN wrapped, transitioning to !oper\n" ); |
449 | tx_sa->active = false; |
450 | if (secy->protect_frames) |
451 | secy->operational = false; |
452 | } |
453 | |
454 | void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa) |
455 | { |
456 | spin_lock_bh(lock: &tx_sa->lock); |
457 | __macsec_pn_wrapped(secy, tx_sa); |
458 | spin_unlock_bh(lock: &tx_sa->lock); |
459 | } |
460 | EXPORT_SYMBOL_GPL(macsec_pn_wrapped); |
461 | |
462 | static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa, |
463 | struct macsec_secy *secy) |
464 | { |
465 | pn_t pn; |
466 | |
467 | spin_lock_bh(lock: &tx_sa->lock); |
468 | |
469 | pn = tx_sa->next_pn_halves; |
470 | if (secy->xpn) |
471 | tx_sa->next_pn++; |
472 | else |
473 | tx_sa->next_pn_halves.lower++; |
474 | |
475 | if (tx_sa->next_pn == 0) |
476 | __macsec_pn_wrapped(secy, tx_sa); |
477 | spin_unlock_bh(lock: &tx_sa->lock); |
478 | |
479 | return pn; |
480 | } |
481 | |
482 | static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) |
483 | { |
484 | struct macsec_dev *macsec = netdev_priv(dev); |
485 | |
486 | skb->dev = macsec->real_dev; |
487 | skb_reset_mac_header(skb); |
488 | skb->protocol = eth_hdr(skb)->h_proto; |
489 | } |
490 | |
491 | static unsigned int macsec_msdu_len(struct sk_buff *skb) |
492 | { |
493 | struct macsec_dev *macsec = macsec_priv(dev: skb->dev); |
494 | struct macsec_secy *secy = &macsec->secy; |
495 | bool sci_present = macsec_skb_cb(skb)->has_sci; |
496 | |
497 | return skb->len - macsec_hdr_len(sci_present) - secy->icv_len; |
498 | } |
499 | |
500 | static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, |
501 | struct macsec_tx_sa *tx_sa) |
502 | { |
503 | unsigned int msdu_len = macsec_msdu_len(skb); |
504 | struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); |
505 | |
506 | u64_stats_update_begin(syncp: &txsc_stats->syncp); |
507 | if (tx_sc->encrypt) { |
508 | txsc_stats->stats.OutOctetsEncrypted += msdu_len; |
509 | txsc_stats->stats.OutPktsEncrypted++; |
510 | this_cpu_inc(tx_sa->stats->OutPktsEncrypted); |
511 | } else { |
512 | txsc_stats->stats.OutOctetsProtected += msdu_len; |
513 | txsc_stats->stats.OutPktsProtected++; |
514 | this_cpu_inc(tx_sa->stats->OutPktsProtected); |
515 | } |
516 | u64_stats_update_end(syncp: &txsc_stats->syncp); |
517 | } |
518 | |
519 | static void count_tx(struct net_device *dev, int ret, int len) |
520 | { |
521 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) |
522 | dev_sw_netstats_tx_add(dev, packets: 1, len); |
523 | } |
524 | |
525 | static void macsec_encrypt_done(void *data, int err) |
526 | { |
527 | struct sk_buff *skb = data; |
528 | struct net_device *dev = skb->dev; |
529 | struct macsec_dev *macsec = macsec_priv(dev); |
530 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; |
531 | int len, ret; |
532 | |
533 | aead_request_free(req: macsec_skb_cb(skb)->req); |
534 | |
535 | rcu_read_lock_bh(); |
536 | macsec_count_tx(skb, tx_sc: &macsec->secy.tx_sc, tx_sa: macsec_skb_cb(skb)->tx_sa); |
537 | /* packet is encrypted/protected so tx_bytes must be calculated */ |
538 | len = macsec_msdu_len(skb) + 2 * ETH_ALEN; |
539 | macsec_encrypt_finish(skb, dev); |
540 | ret = dev_queue_xmit(skb); |
541 | count_tx(dev, ret, len); |
542 | rcu_read_unlock_bh(); |
543 | |
544 | macsec_txsa_put(sa); |
545 | dev_put(dev); |
546 | } |
547 | |
548 | static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
549 | unsigned char **iv, |
550 | struct scatterlist **sg, |
551 | int num_frags) |
552 | { |
553 | size_t size, iv_offset, sg_offset; |
554 | struct aead_request *req; |
555 | void *tmp; |
556 | |
557 | size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); |
558 | iv_offset = size; |
559 | size += GCM_AES_IV_LEN; |
560 | |
561 | size = ALIGN(size, __alignof__(struct scatterlist)); |
562 | sg_offset = size; |
563 | size += sizeof(struct scatterlist) * num_frags; |
564 | |
565 | tmp = kmalloc(size, GFP_ATOMIC); |
566 | if (!tmp) |
567 | return NULL; |
568 | |
569 | *iv = (unsigned char *)(tmp + iv_offset); |
570 | *sg = (struct scatterlist *)(tmp + sg_offset); |
571 | req = tmp; |
572 | |
573 | aead_request_set_tfm(req, tfm); |
574 | |
575 | return req; |
576 | } |
577 | |
578 | static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
579 | struct net_device *dev) |
580 | { |
581 | int ret; |
582 | struct scatterlist *sg; |
583 | struct sk_buff *trailer; |
584 | unsigned char *iv; |
585 | struct ethhdr *eth; |
586 | struct macsec_eth_header *hh; |
587 | size_t unprotected_len; |
588 | struct aead_request *req; |
589 | struct macsec_secy *secy; |
590 | struct macsec_tx_sc *tx_sc; |
591 | struct macsec_tx_sa *tx_sa; |
592 | struct macsec_dev *macsec = macsec_priv(dev); |
593 | bool sci_present; |
594 | pn_t pn; |
595 | |
596 | secy = &macsec->secy; |
597 | tx_sc = &secy->tx_sc; |
598 | |
599 | /* 10.5.1 TX SA assignment */ |
600 | tx_sa = macsec_txsa_get(ptr: tx_sc->sa[tx_sc->encoding_sa]); |
601 | if (!tx_sa) { |
602 | secy->operational = false; |
603 | kfree_skb(skb); |
604 | return ERR_PTR(error: -EINVAL); |
605 | } |
606 | |
607 | if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || |
608 | skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { |
609 | struct sk_buff *nskb = skb_copy_expand(skb, |
610 | MACSEC_NEEDED_HEADROOM, |
611 | MACSEC_NEEDED_TAILROOM, |
612 | GFP_ATOMIC); |
613 | if (likely(nskb)) { |
614 | consume_skb(skb); |
615 | skb = nskb; |
616 | } else { |
617 | macsec_txsa_put(sa: tx_sa); |
618 | kfree_skb(skb); |
619 | return ERR_PTR(error: -ENOMEM); |
620 | } |
621 | } else { |
622 | skb = skb_unshare(skb, GFP_ATOMIC); |
623 | if (!skb) { |
624 | macsec_txsa_put(sa: tx_sa); |
625 | return ERR_PTR(error: -ENOMEM); |
626 | } |
627 | } |
628 | |
629 | unprotected_len = skb->len; |
630 | eth = eth_hdr(skb); |
631 | sci_present = macsec_send_sci(secy); |
632 | hh = skb_push(skb, len: macsec_extra_len(sci_present)); |
633 | memmove(hh, eth, 2 * ETH_ALEN); |
634 | |
635 | pn = tx_sa_update_pn(tx_sa, secy); |
636 | if (pn.full64 == 0) { |
637 | macsec_txsa_put(sa: tx_sa); |
638 | kfree_skb(skb); |
639 | return ERR_PTR(error: -ENOLINK); |
640 | } |
641 | macsec_fill_sectag(h: hh, secy, pn: pn.lower, sci_present); |
642 | macsec_set_shortlen(h: hh, data_len: unprotected_len - 2 * ETH_ALEN); |
643 | |
644 | skb_put(skb, len: secy->icv_len); |
645 | |
646 | if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { |
647 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
648 | |
649 | u64_stats_update_begin(syncp: &secy_stats->syncp); |
650 | secy_stats->stats.OutPktsTooLong++; |
651 | u64_stats_update_end(syncp: &secy_stats->syncp); |
652 | |
653 | macsec_txsa_put(sa: tx_sa); |
654 | kfree_skb(skb); |
655 | return ERR_PTR(error: -EINVAL); |
656 | } |
657 | |
658 | ret = skb_cow_data(skb, tailbits: 0, trailer: &trailer); |
659 | if (unlikely(ret < 0)) { |
660 | macsec_txsa_put(sa: tx_sa); |
661 | kfree_skb(skb); |
662 | return ERR_PTR(error: ret); |
663 | } |
664 | |
665 | req = macsec_alloc_req(tfm: tx_sa->key.tfm, iv: &iv, sg: &sg, num_frags: ret); |
666 | if (!req) { |
667 | macsec_txsa_put(sa: tx_sa); |
668 | kfree_skb(skb); |
669 | return ERR_PTR(error: -ENOMEM); |
670 | } |
671 | |
672 | if (secy->xpn) |
673 | macsec_fill_iv_xpn(iv, ssci: tx_sa->ssci, pn: pn.full64, salt: tx_sa->key.salt); |
674 | else |
675 | macsec_fill_iv(iv, sci: secy->sci, pn: pn.lower); |
676 | |
677 | sg_init_table(sg, ret); |
678 | ret = skb_to_sgvec(skb, sg, offset: 0, len: skb->len); |
679 | if (unlikely(ret < 0)) { |
680 | aead_request_free(req); |
681 | macsec_txsa_put(sa: tx_sa); |
682 | kfree_skb(skb); |
683 | return ERR_PTR(error: ret); |
684 | } |
685 | |
686 | if (tx_sc->encrypt) { |
687 | int len = skb->len - macsec_hdr_len(sci_present) - |
688 | secy->icv_len; |
689 | aead_request_set_crypt(req, src: sg, dst: sg, cryptlen: len, iv); |
690 | aead_request_set_ad(req, assoclen: macsec_hdr_len(sci_present)); |
691 | } else { |
692 | aead_request_set_crypt(req, src: sg, dst: sg, cryptlen: 0, iv); |
693 | aead_request_set_ad(req, assoclen: skb->len - secy->icv_len); |
694 | } |
695 | |
696 | macsec_skb_cb(skb)->req = req; |
697 | macsec_skb_cb(skb)->tx_sa = tx_sa; |
698 | macsec_skb_cb(skb)->has_sci = sci_present; |
699 | aead_request_set_callback(req, flags: 0, compl: macsec_encrypt_done, data: skb); |
700 | |
701 | dev_hold(dev: skb->dev); |
702 | ret = crypto_aead_encrypt(req); |
703 | if (ret == -EINPROGRESS) { |
704 | return ERR_PTR(error: ret); |
705 | } else if (ret != 0) { |
706 | dev_put(dev: skb->dev); |
707 | kfree_skb(skb); |
708 | aead_request_free(req); |
709 | macsec_txsa_put(sa: tx_sa); |
710 | return ERR_PTR(error: -EINVAL); |
711 | } |
712 | |
713 | dev_put(dev: skb->dev); |
714 | aead_request_free(req); |
715 | macsec_txsa_put(sa: tx_sa); |
716 | |
717 | return skb; |
718 | } |
719 | |
720 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) |
721 | { |
722 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; |
723 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); |
724 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); |
725 | u32 lowest_pn = 0; |
726 | |
727 | spin_lock(lock: &rx_sa->lock); |
728 | if (rx_sa->next_pn_halves.lower >= secy->replay_window) |
729 | lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window; |
730 | |
731 | /* Now perform replay protection check again |
732 | * (see IEEE 802.1AE-2006 figure 10-5) |
733 | */ |
734 | if (secy->replay_protect && pn < lowest_pn && |
735 | (!secy->xpn || pn_same_half(pn, lowest_pn))) { |
736 | spin_unlock(lock: &rx_sa->lock); |
737 | u64_stats_update_begin(syncp: &rxsc_stats->syncp); |
738 | rxsc_stats->stats.InPktsLate++; |
739 | u64_stats_update_end(syncp: &rxsc_stats->syncp); |
740 | DEV_STATS_INC(secy->netdev, rx_dropped); |
741 | return false; |
742 | } |
743 | |
744 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { |
745 | unsigned int msdu_len = macsec_msdu_len(skb); |
746 | u64_stats_update_begin(syncp: &rxsc_stats->syncp); |
747 | if (hdr->tci_an & MACSEC_TCI_E) |
748 | rxsc_stats->stats.InOctetsDecrypted += msdu_len; |
749 | else |
750 | rxsc_stats->stats.InOctetsValidated += msdu_len; |
751 | u64_stats_update_end(syncp: &rxsc_stats->syncp); |
752 | } |
753 | |
754 | if (!macsec_skb_cb(skb)->valid) { |
755 | spin_unlock(lock: &rx_sa->lock); |
756 | |
757 | /* 10.6.5 */ |
758 | if (hdr->tci_an & MACSEC_TCI_C || |
759 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { |
760 | u64_stats_update_begin(syncp: &rxsc_stats->syncp); |
761 | rxsc_stats->stats.InPktsNotValid++; |
762 | u64_stats_update_end(syncp: &rxsc_stats->syncp); |
763 | this_cpu_inc(rx_sa->stats->InPktsNotValid); |
764 | DEV_STATS_INC(secy->netdev, rx_errors); |
765 | return false; |
766 | } |
767 | |
768 | u64_stats_update_begin(syncp: &rxsc_stats->syncp); |
769 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { |
770 | rxsc_stats->stats.InPktsInvalid++; |
771 | this_cpu_inc(rx_sa->stats->InPktsInvalid); |
772 | } else if (pn < lowest_pn) { |
773 | rxsc_stats->stats.InPktsDelayed++; |
774 | } else { |
775 | rxsc_stats->stats.InPktsUnchecked++; |
776 | } |
777 | u64_stats_update_end(syncp: &rxsc_stats->syncp); |
778 | } else { |
779 | u64_stats_update_begin(syncp: &rxsc_stats->syncp); |
780 | if (pn < lowest_pn) { |
781 | rxsc_stats->stats.InPktsDelayed++; |
782 | } else { |
783 | rxsc_stats->stats.InPktsOK++; |
784 | this_cpu_inc(rx_sa->stats->InPktsOK); |
785 | } |
786 | u64_stats_update_end(syncp: &rxsc_stats->syncp); |
787 | |
788 | // Instead of "pn >=" - to support pn overflow in xpn |
789 | if (pn + 1 > rx_sa->next_pn_halves.lower) { |
790 | rx_sa->next_pn_halves.lower = pn + 1; |
791 | } else if (secy->xpn && |
792 | !pn_same_half(pn, rx_sa->next_pn_halves.lower)) { |
793 | rx_sa->next_pn_halves.upper++; |
794 | rx_sa->next_pn_halves.lower = pn + 1; |
795 | } |
796 | |
797 | spin_unlock(lock: &rx_sa->lock); |
798 | } |
799 | |
800 | return true; |
801 | } |
802 | |
803 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) |
804 | { |
805 | skb->pkt_type = PACKET_HOST; |
806 | skb->protocol = eth_type_trans(skb, dev); |
807 | |
808 | skb_reset_network_header(skb); |
809 | if (!skb_transport_header_was_set(skb)) |
810 | skb_reset_transport_header(skb); |
811 | skb_reset_mac_len(skb); |
812 | } |
813 | |
814 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) |
815 | { |
816 | skb->ip_summed = CHECKSUM_NONE; |
817 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); |
818 | skb_pull(skb, len: hdr_len); |
819 | pskb_trim_unique(skb, len: skb->len - icv_len); |
820 | } |
821 | |
822 | static void count_rx(struct net_device *dev, int len) |
823 | { |
824 | dev_sw_netstats_rx_add(dev, len); |
825 | } |
826 | |
827 | static void macsec_decrypt_done(void *data, int err) |
828 | { |
829 | struct sk_buff *skb = data; |
830 | struct net_device *dev = skb->dev; |
831 | struct macsec_dev *macsec = macsec_priv(dev); |
832 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; |
833 | struct macsec_rx_sc *rx_sc = rx_sa->sc; |
834 | int len; |
835 | u32 pn; |
836 | |
837 | aead_request_free(req: macsec_skb_cb(skb)->req); |
838 | |
839 | if (!err) |
840 | macsec_skb_cb(skb)->valid = true; |
841 | |
842 | rcu_read_lock_bh(); |
843 | pn = ntohl(macsec_ethhdr(skb)->packet_number); |
844 | if (!macsec_post_decrypt(skb, secy: &macsec->secy, pn)) { |
845 | rcu_read_unlock_bh(); |
846 | kfree_skb(skb); |
847 | goto out; |
848 | } |
849 | |
850 | macsec_finalize_skb(skb, icv_len: macsec->secy.icv_len, |
851 | hdr_len: macsec_extra_len(sci_present: macsec_skb_cb(skb)->has_sci)); |
852 | len = skb->len; |
853 | macsec_reset_skb(skb, dev: macsec->secy.netdev); |
854 | |
855 | if (gro_cells_receive(gcells: &macsec->gro_cells, skb) == NET_RX_SUCCESS) |
856 | count_rx(dev, len); |
857 | |
858 | rcu_read_unlock_bh(); |
859 | |
860 | out: |
861 | macsec_rxsa_put(sa: rx_sa); |
862 | macsec_rxsc_put(sc: rx_sc); |
863 | dev_put(dev); |
864 | } |
865 | |
866 | static struct sk_buff *macsec_decrypt(struct sk_buff *skb, |
867 | struct net_device *dev, |
868 | struct macsec_rx_sa *rx_sa, |
869 | sci_t sci, |
870 | struct macsec_secy *secy) |
871 | { |
872 | int ret; |
873 | struct scatterlist *sg; |
874 | struct sk_buff *trailer; |
875 | unsigned char *iv; |
876 | struct aead_request *req; |
877 | struct macsec_eth_header *hdr; |
878 | u32 hdr_pn; |
879 | u16 icv_len = secy->icv_len; |
880 | |
881 | macsec_skb_cb(skb)->valid = false; |
882 | skb = skb_share_check(skb, GFP_ATOMIC); |
883 | if (!skb) |
884 | return ERR_PTR(error: -ENOMEM); |
885 | |
886 | ret = skb_cow_data(skb, tailbits: 0, trailer: &trailer); |
887 | if (unlikely(ret < 0)) { |
888 | kfree_skb(skb); |
889 | return ERR_PTR(error: ret); |
890 | } |
891 | req = macsec_alloc_req(tfm: rx_sa->key.tfm, iv: &iv, sg: &sg, num_frags: ret); |
892 | if (!req) { |
893 | kfree_skb(skb); |
894 | return ERR_PTR(error: -ENOMEM); |
895 | } |
896 | |
897 | hdr = (struct macsec_eth_header *)skb->data; |
898 | hdr_pn = ntohl(hdr->packet_number); |
899 | |
900 | if (secy->xpn) { |
901 | pn_t recovered_pn = rx_sa->next_pn_halves; |
902 | |
903 | recovered_pn.lower = hdr_pn; |
904 | if (hdr_pn < rx_sa->next_pn_halves.lower && |
905 | !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower)) |
906 | recovered_pn.upper++; |
907 | |
908 | macsec_fill_iv_xpn(iv, ssci: rx_sa->ssci, pn: recovered_pn.full64, |
909 | salt: rx_sa->key.salt); |
910 | } else { |
911 | macsec_fill_iv(iv, sci, pn: hdr_pn); |
912 | } |
913 | |
914 | sg_init_table(sg, ret); |
915 | ret = skb_to_sgvec(skb, sg, offset: 0, len: skb->len); |
916 | if (unlikely(ret < 0)) { |
917 | aead_request_free(req); |
918 | kfree_skb(skb); |
919 | return ERR_PTR(error: ret); |
920 | } |
921 | |
922 | if (hdr->tci_an & MACSEC_TCI_E) { |
923 | /* confidentiality: ethernet + macsec header |
924 | * authenticated, encrypted payload |
925 | */ |
926 | int len = skb->len - macsec_hdr_len(sci_present: macsec_skb_cb(skb)->has_sci); |
927 | |
928 | aead_request_set_crypt(req, src: sg, dst: sg, cryptlen: len, iv); |
929 | aead_request_set_ad(req, assoclen: macsec_hdr_len(sci_present: macsec_skb_cb(skb)->has_sci)); |
930 | skb = skb_unshare(skb, GFP_ATOMIC); |
931 | if (!skb) { |
932 | aead_request_free(req); |
933 | return ERR_PTR(error: -ENOMEM); |
934 | } |
935 | } else { |
936 | /* integrity only: all headers + data authenticated */ |
937 | aead_request_set_crypt(req, src: sg, dst: sg, cryptlen: icv_len, iv); |
938 | aead_request_set_ad(req, assoclen: skb->len - icv_len); |
939 | } |
940 | |
941 | macsec_skb_cb(skb)->req = req; |
942 | skb->dev = dev; |
943 | aead_request_set_callback(req, flags: 0, compl: macsec_decrypt_done, data: skb); |
944 | |
945 | dev_hold(dev); |
946 | ret = crypto_aead_decrypt(req); |
947 | if (ret == -EINPROGRESS) { |
948 | return ERR_PTR(error: ret); |
949 | } else if (ret != 0) { |
950 | /* decryption/authentication failed |
951 | * 10.6 if validateFrames is disabled, deliver anyway |
952 | */ |
953 | if (ret != -EBADMSG) { |
954 | kfree_skb(skb); |
955 | skb = ERR_PTR(error: ret); |
956 | } |
957 | } else { |
958 | macsec_skb_cb(skb)->valid = true; |
959 | } |
960 | dev_put(dev); |
961 | |
962 | aead_request_free(req); |
963 | |
964 | return skb; |
965 | } |
966 | |
967 | static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) |
968 | { |
969 | struct macsec_rx_sc *rx_sc; |
970 | |
971 | for_each_rxsc(secy, rx_sc) { |
972 | if (rx_sc->sci == sci) |
973 | return rx_sc; |
974 | } |
975 | |
976 | return NULL; |
977 | } |
978 | |
979 | static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) |
980 | { |
981 | struct macsec_rx_sc *rx_sc; |
982 | |
983 | for_each_rxsc_rtnl(secy, rx_sc) { |
984 | if (rx_sc->sci == sci) |
985 | return rx_sc; |
986 | } |
987 | |
988 | return NULL; |
989 | } |
990 | |
991 | static enum rx_handler_result handle_not_macsec(struct sk_buff *skb) |
992 | { |
993 | /* Deliver to the uncontrolled port by default */ |
994 | enum rx_handler_result ret = RX_HANDLER_PASS; |
995 | struct ethhdr *hdr = eth_hdr(skb); |
996 | struct metadata_dst *md_dst; |
997 | struct macsec_rxh_data *rxd; |
998 | struct macsec_dev *macsec; |
999 | |
1000 | rcu_read_lock(); |
1001 | rxd = macsec_data_rcu(dev: skb->dev); |
1002 | md_dst = skb_metadata_dst(skb); |
1003 | |
1004 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
1005 | struct sk_buff *nskb; |
1006 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
1007 | struct net_device *ndev = macsec->secy.netdev; |
1008 | |
1009 | /* If h/w offloading is enabled, HW decodes frames and strips |
1010 | * the SecTAG, so we have to deduce which port to deliver to. |
1011 | */ |
1012 | if (macsec_is_offloaded(macsec) && netif_running(dev: ndev)) { |
1013 | struct macsec_rx_sc *rx_sc = NULL; |
1014 | |
1015 | if (md_dst && md_dst->type == METADATA_MACSEC) |
1016 | rx_sc = find_rx_sc(secy: &macsec->secy, sci: md_dst->u.macsec_info.sci); |
1017 | |
1018 | if (md_dst && md_dst->type == METADATA_MACSEC && !rx_sc) |
1019 | continue; |
1020 | |
1021 | if (ether_addr_equal_64bits(addr1: hdr->h_dest, |
1022 | addr2: ndev->dev_addr)) { |
1023 | /* exact match, divert skb to this port */ |
1024 | skb->dev = ndev; |
1025 | skb->pkt_type = PACKET_HOST; |
1026 | ret = RX_HANDLER_ANOTHER; |
1027 | goto out; |
1028 | } else if (is_multicast_ether_addr_64bits( |
1029 | addr: hdr->h_dest)) { |
1030 | /* multicast frame, deliver on this port too */ |
1031 | nskb = skb_clone(skb, GFP_ATOMIC); |
1032 | if (!nskb) |
1033 | break; |
1034 | |
1035 | nskb->dev = ndev; |
1036 | if (ether_addr_equal_64bits(addr1: hdr->h_dest, |
1037 | addr2: ndev->broadcast)) |
1038 | nskb->pkt_type = PACKET_BROADCAST; |
1039 | else |
1040 | nskb->pkt_type = PACKET_MULTICAST; |
1041 | |
1042 | __netif_rx(skb: nskb); |
1043 | } else if (rx_sc || ndev->flags & IFF_PROMISC) { |
1044 | skb->dev = ndev; |
1045 | skb->pkt_type = PACKET_HOST; |
1046 | ret = RX_HANDLER_ANOTHER; |
1047 | goto out; |
1048 | } |
1049 | |
1050 | continue; |
1051 | } |
1052 | |
1053 | /* 10.6 If the management control validateFrames is not |
1054 | * Strict, frames without a SecTAG are received, counted, and |
1055 | * delivered to the Controlled Port |
1056 | */ |
1057 | if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { |
1058 | u64_stats_update_begin(syncp: &secy_stats->syncp); |
1059 | secy_stats->stats.InPktsNoTag++; |
1060 | u64_stats_update_end(syncp: &secy_stats->syncp); |
1061 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
1062 | continue; |
1063 | } |
1064 | |
1065 | /* deliver on this port */ |
1066 | nskb = skb_clone(skb, GFP_ATOMIC); |
1067 | if (!nskb) |
1068 | break; |
1069 | |
1070 | nskb->dev = ndev; |
1071 | |
1072 | if (__netif_rx(skb: nskb) == NET_RX_SUCCESS) { |
1073 | u64_stats_update_begin(syncp: &secy_stats->syncp); |
1074 | secy_stats->stats.InPktsUntagged++; |
1075 | u64_stats_update_end(syncp: &secy_stats->syncp); |
1076 | } |
1077 | } |
1078 | |
1079 | out: |
1080 | rcu_read_unlock(); |
1081 | return ret; |
1082 | } |
1083 | |
1084 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) |
1085 | { |
1086 | struct sk_buff *skb = *pskb; |
1087 | struct net_device *dev = skb->dev; |
1088 | struct macsec_eth_header *hdr; |
1089 | struct macsec_secy *secy = NULL; |
1090 | struct macsec_rx_sc *rx_sc; |
1091 | struct macsec_rx_sa *rx_sa; |
1092 | struct macsec_rxh_data *rxd; |
1093 | struct macsec_dev *macsec; |
1094 | unsigned int len; |
1095 | sci_t sci; |
1096 | u32 hdr_pn; |
1097 | bool cbit; |
1098 | struct pcpu_rx_sc_stats *rxsc_stats; |
1099 | struct pcpu_secy_stats *secy_stats; |
1100 | bool pulled_sci; |
1101 | int ret; |
1102 | |
1103 | if (skb_headroom(skb) < ETH_HLEN) |
1104 | goto drop_direct; |
1105 | |
1106 | hdr = macsec_ethhdr(skb); |
1107 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) |
1108 | return handle_not_macsec(skb); |
1109 | |
1110 | skb = skb_unshare(skb, GFP_ATOMIC); |
1111 | *pskb = skb; |
1112 | if (!skb) |
1113 | return RX_HANDLER_CONSUMED; |
1114 | |
1115 | pulled_sci = pskb_may_pull(skb, len: macsec_extra_len(sci_present: true)); |
1116 | if (!pulled_sci) { |
1117 | if (!pskb_may_pull(skb, len: macsec_extra_len(sci_present: false))) |
1118 | goto drop_direct; |
1119 | } |
1120 | |
1121 | hdr = macsec_ethhdr(skb); |
1122 | |
1123 | /* Frames with a SecTAG that has the TCI E bit set but the C |
1124 | * bit clear are discarded, as this reserved encoding is used |
1125 | * to identify frames with a SecTAG that are not to be |
1126 | * delivered to the Controlled Port. |
1127 | */ |
1128 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) |
1129 | return RX_HANDLER_PASS; |
1130 | |
1131 | /* now, pull the extra length */ |
1132 | if (hdr->tci_an & MACSEC_TCI_SC) { |
1133 | if (!pulled_sci) |
1134 | goto drop_direct; |
1135 | } |
1136 | |
1137 | /* ethernet header is part of crypto processing */ |
1138 | skb_push(skb, ETH_HLEN); |
1139 | |
1140 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); |
1141 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; |
1142 | sci = macsec_frame_sci(hdr, sci_present: macsec_skb_cb(skb)->has_sci); |
1143 | |
1144 | rcu_read_lock(); |
1145 | rxd = macsec_data_rcu(dev: skb->dev); |
1146 | |
1147 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
1148 | struct macsec_rx_sc *sc = find_rx_sc(secy: &macsec->secy, sci); |
1149 | |
1150 | sc = sc ? macsec_rxsc_get(sc) : NULL; |
1151 | |
1152 | if (sc) { |
1153 | secy = &macsec->secy; |
1154 | rx_sc = sc; |
1155 | break; |
1156 | } |
1157 | } |
1158 | |
1159 | if (!secy) |
1160 | goto nosci; |
1161 | |
1162 | dev = secy->netdev; |
1163 | macsec = macsec_priv(dev); |
1164 | secy_stats = this_cpu_ptr(macsec->stats); |
1165 | rxsc_stats = this_cpu_ptr(rx_sc->stats); |
1166 | |
1167 | if (!macsec_validate_skb(skb, icv_len: secy->icv_len, xpn: secy->xpn)) { |
1168 | u64_stats_update_begin(syncp: &secy_stats->syncp); |
1169 | secy_stats->stats.InPktsBadTag++; |
1170 | u64_stats_update_end(syncp: &secy_stats->syncp); |
1171 | DEV_STATS_INC(secy->netdev, rx_errors); |
1172 | goto drop_nosa; |
1173 | } |
1174 | |
1175 | rx_sa = macsec_rxsa_get(ptr: rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); |
1176 | if (!rx_sa) { |
1177 | /* 10.6.1 if the SA is not in use */ |
1178 | |
1179 | /* If validateFrames is Strict or the C bit in the |
1180 | * SecTAG is set, discard |
1181 | */ |
1182 | struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc); |
1183 | if (hdr->tci_an & MACSEC_TCI_C || |
1184 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { |
1185 | u64_stats_update_begin(syncp: &rxsc_stats->syncp); |
1186 | rxsc_stats->stats.InPktsNotUsingSA++; |
1187 | u64_stats_update_end(syncp: &rxsc_stats->syncp); |
1188 | DEV_STATS_INC(secy->netdev, rx_errors); |
1189 | if (active_rx_sa) |
1190 | this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA); |
1191 | goto drop_nosa; |
1192 | } |
1193 | |
1194 | /* not Strict, the frame (with the SecTAG and ICV |
1195 | * removed) is delivered to the Controlled Port. |
1196 | */ |
1197 | u64_stats_update_begin(syncp: &rxsc_stats->syncp); |
1198 | rxsc_stats->stats.InPktsUnusedSA++; |
1199 | u64_stats_update_end(syncp: &rxsc_stats->syncp); |
1200 | if (active_rx_sa) |
1201 | this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA); |
1202 | goto deliver; |
1203 | } |
1204 | |
1205 | /* First, PN check to avoid decrypting obviously wrong packets */ |
1206 | hdr_pn = ntohl(hdr->packet_number); |
1207 | if (secy->replay_protect) { |
1208 | bool late; |
1209 | |
1210 | spin_lock(lock: &rx_sa->lock); |
1211 | late = rx_sa->next_pn_halves.lower >= secy->replay_window && |
1212 | hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window); |
1213 | |
1214 | if (secy->xpn) |
1215 | late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn); |
1216 | spin_unlock(lock: &rx_sa->lock); |
1217 | |
1218 | if (late) { |
1219 | u64_stats_update_begin(syncp: &rxsc_stats->syncp); |
1220 | rxsc_stats->stats.InPktsLate++; |
1221 | u64_stats_update_end(syncp: &rxsc_stats->syncp); |
1222 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
1223 | goto drop; |
1224 | } |
1225 | } |
1226 | |
1227 | macsec_skb_cb(skb)->rx_sa = rx_sa; |
1228 | |
1229 | /* Disabled && !changed text => skip validation */ |
1230 | if (hdr->tci_an & MACSEC_TCI_C || |
1231 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) |
1232 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); |
1233 | |
1234 | if (IS_ERR(ptr: skb)) { |
1235 | /* the decrypt callback needs the reference */ |
1236 | if (PTR_ERR(ptr: skb) != -EINPROGRESS) { |
1237 | macsec_rxsa_put(sa: rx_sa); |
1238 | macsec_rxsc_put(sc: rx_sc); |
1239 | } |
1240 | rcu_read_unlock(); |
1241 | *pskb = NULL; |
1242 | return RX_HANDLER_CONSUMED; |
1243 | } |
1244 | |
1245 | if (!macsec_post_decrypt(skb, secy, pn: hdr_pn)) |
1246 | goto drop; |
1247 | |
1248 | deliver: |
1249 | macsec_finalize_skb(skb, icv_len: secy->icv_len, |
1250 | hdr_len: macsec_extra_len(sci_present: macsec_skb_cb(skb)->has_sci)); |
1251 | len = skb->len; |
1252 | macsec_reset_skb(skb, dev: secy->netdev); |
1253 | |
1254 | if (rx_sa) |
1255 | macsec_rxsa_put(sa: rx_sa); |
1256 | macsec_rxsc_put(sc: rx_sc); |
1257 | |
1258 | skb_orphan(skb); |
1259 | ret = gro_cells_receive(gcells: &macsec->gro_cells, skb); |
1260 | if (ret == NET_RX_SUCCESS) |
1261 | count_rx(dev, len); |
1262 | else |
1263 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
1264 | |
1265 | rcu_read_unlock(); |
1266 | |
1267 | *pskb = NULL; |
1268 | return RX_HANDLER_CONSUMED; |
1269 | |
1270 | drop: |
1271 | macsec_rxsa_put(sa: rx_sa); |
1272 | drop_nosa: |
1273 | macsec_rxsc_put(sc: rx_sc); |
1274 | rcu_read_unlock(); |
1275 | drop_direct: |
1276 | kfree_skb(skb); |
1277 | *pskb = NULL; |
1278 | return RX_HANDLER_CONSUMED; |
1279 | |
1280 | nosci: |
1281 | /* 10.6.1 if the SC is not found */ |
1282 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); |
1283 | if (!cbit) |
1284 | macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN, |
1285 | hdr_len: macsec_extra_len(sci_present: macsec_skb_cb(skb)->has_sci)); |
1286 | |
1287 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
1288 | struct sk_buff *nskb; |
1289 | |
1290 | secy_stats = this_cpu_ptr(macsec->stats); |
1291 | |
1292 | /* If validateFrames is Strict or the C bit in the |
1293 | * SecTAG is set, discard |
1294 | */ |
1295 | if (cbit || |
1296 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { |
1297 | u64_stats_update_begin(syncp: &secy_stats->syncp); |
1298 | secy_stats->stats.InPktsNoSCI++; |
1299 | u64_stats_update_end(syncp: &secy_stats->syncp); |
1300 | DEV_STATS_INC(macsec->secy.netdev, rx_errors); |
1301 | continue; |
1302 | } |
1303 | |
1304 | /* not strict, the frame (with the SecTAG and ICV |
1305 | * removed) is delivered to the Controlled Port. |
1306 | */ |
1307 | nskb = skb_clone(skb, GFP_ATOMIC); |
1308 | if (!nskb) |
1309 | break; |
1310 | |
1311 | macsec_reset_skb(skb: nskb, dev: macsec->secy.netdev); |
1312 | |
1313 | ret = __netif_rx(skb: nskb); |
1314 | if (ret == NET_RX_SUCCESS) { |
1315 | u64_stats_update_begin(syncp: &secy_stats->syncp); |
1316 | secy_stats->stats.InPktsUnknownSCI++; |
1317 | u64_stats_update_end(syncp: &secy_stats->syncp); |
1318 | } else { |
1319 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
1320 | } |
1321 | } |
1322 | |
1323 | rcu_read_unlock(); |
1324 | *pskb = skb; |
1325 | return RX_HANDLER_PASS; |
1326 | } |
1327 | |
1328 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) |
1329 | { |
1330 | struct crypto_aead *tfm; |
1331 | int ret; |
1332 | |
1333 | tfm = crypto_alloc_aead(alg_name: "gcm(aes)" , type: 0, mask: 0); |
1334 | |
1335 | if (IS_ERR(ptr: tfm)) |
1336 | return tfm; |
1337 | |
1338 | ret = crypto_aead_setkey(tfm, key, keylen: key_len); |
1339 | if (ret < 0) |
1340 | goto fail; |
1341 | |
1342 | ret = crypto_aead_setauthsize(tfm, authsize: icv_len); |
1343 | if (ret < 0) |
1344 | goto fail; |
1345 | |
1346 | return tfm; |
1347 | fail: |
1348 | crypto_free_aead(tfm); |
1349 | return ERR_PTR(error: ret); |
1350 | } |
1351 | |
1352 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, |
1353 | int icv_len) |
1354 | { |
1355 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); |
1356 | if (!rx_sa->stats) |
1357 | return -ENOMEM; |
1358 | |
1359 | rx_sa->key.tfm = macsec_alloc_tfm(key: sak, key_len, icv_len); |
1360 | if (IS_ERR(ptr: rx_sa->key.tfm)) { |
1361 | free_percpu(pdata: rx_sa->stats); |
1362 | return PTR_ERR(ptr: rx_sa->key.tfm); |
1363 | } |
1364 | |
1365 | rx_sa->ssci = MACSEC_UNDEF_SSCI; |
1366 | rx_sa->active = false; |
1367 | rx_sa->next_pn = 1; |
1368 | refcount_set(r: &rx_sa->refcnt, n: 1); |
1369 | spin_lock_init(&rx_sa->lock); |
1370 | |
1371 | return 0; |
1372 | } |
1373 | |
1374 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) |
1375 | { |
1376 | rx_sa->active = false; |
1377 | |
1378 | macsec_rxsa_put(sa: rx_sa); |
1379 | } |
1380 | |
1381 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) |
1382 | { |
1383 | int i; |
1384 | |
1385 | for (i = 0; i < MACSEC_NUM_AN; i++) { |
1386 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); |
1387 | |
1388 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); |
1389 | if (sa) |
1390 | clear_rx_sa(rx_sa: sa); |
1391 | } |
1392 | |
1393 | macsec_rxsc_put(sc: rx_sc); |
1394 | } |
1395 | |
1396 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) |
1397 | { |
1398 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; |
1399 | |
1400 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); |
1401 | rx_sc; |
1402 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { |
1403 | if (rx_sc->sci == sci) { |
1404 | if (rx_sc->active) |
1405 | secy->n_rx_sc--; |
1406 | rcu_assign_pointer(*rx_scp, rx_sc->next); |
1407 | return rx_sc; |
1408 | } |
1409 | } |
1410 | |
1411 | return NULL; |
1412 | } |
1413 | |
1414 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci, |
1415 | bool active) |
1416 | { |
1417 | struct macsec_rx_sc *rx_sc; |
1418 | struct macsec_dev *macsec; |
1419 | struct net_device *real_dev = macsec_priv(dev)->real_dev; |
1420 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev: real_dev); |
1421 | struct macsec_secy *secy; |
1422 | |
1423 | list_for_each_entry(macsec, &rxd->secys, secys) { |
1424 | if (find_rx_sc_rtnl(secy: &macsec->secy, sci)) |
1425 | return ERR_PTR(error: -EEXIST); |
1426 | } |
1427 | |
1428 | rx_sc = kzalloc(size: sizeof(*rx_sc), GFP_KERNEL); |
1429 | if (!rx_sc) |
1430 | return ERR_PTR(error: -ENOMEM); |
1431 | |
1432 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); |
1433 | if (!rx_sc->stats) { |
1434 | kfree(objp: rx_sc); |
1435 | return ERR_PTR(error: -ENOMEM); |
1436 | } |
1437 | |
1438 | rx_sc->sci = sci; |
1439 | rx_sc->active = active; |
1440 | refcount_set(r: &rx_sc->refcnt, n: 1); |
1441 | |
1442 | secy = &macsec_priv(dev)->secy; |
1443 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); |
1444 | rcu_assign_pointer(secy->rx_sc, rx_sc); |
1445 | |
1446 | if (rx_sc->active) |
1447 | secy->n_rx_sc++; |
1448 | |
1449 | return rx_sc; |
1450 | } |
1451 | |
1452 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, |
1453 | int icv_len) |
1454 | { |
1455 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); |
1456 | if (!tx_sa->stats) |
1457 | return -ENOMEM; |
1458 | |
1459 | tx_sa->key.tfm = macsec_alloc_tfm(key: sak, key_len, icv_len); |
1460 | if (IS_ERR(ptr: tx_sa->key.tfm)) { |
1461 | free_percpu(pdata: tx_sa->stats); |
1462 | return PTR_ERR(ptr: tx_sa->key.tfm); |
1463 | } |
1464 | |
1465 | tx_sa->ssci = MACSEC_UNDEF_SSCI; |
1466 | tx_sa->active = false; |
1467 | refcount_set(r: &tx_sa->refcnt, n: 1); |
1468 | spin_lock_init(&tx_sa->lock); |
1469 | |
1470 | return 0; |
1471 | } |
1472 | |
1473 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) |
1474 | { |
1475 | tx_sa->active = false; |
1476 | |
1477 | macsec_txsa_put(sa: tx_sa); |
1478 | } |
1479 | |
1480 | static struct genl_family macsec_fam; |
1481 | |
1482 | static struct net_device *get_dev_from_nl(struct net *net, |
1483 | struct nlattr **attrs) |
1484 | { |
1485 | int ifindex = nla_get_u32(nla: attrs[MACSEC_ATTR_IFINDEX]); |
1486 | struct net_device *dev; |
1487 | |
1488 | dev = __dev_get_by_index(net, ifindex); |
1489 | if (!dev) |
1490 | return ERR_PTR(error: -ENODEV); |
1491 | |
1492 | if (!netif_is_macsec(dev)) |
1493 | return ERR_PTR(error: -ENODEV); |
1494 | |
1495 | return dev; |
1496 | } |
1497 | |
1498 | static enum macsec_offload nla_get_offload(const struct nlattr *nla) |
1499 | { |
1500 | return (__force enum macsec_offload)nla_get_u8(nla); |
1501 | } |
1502 | |
1503 | static sci_t nla_get_sci(const struct nlattr *nla) |
1504 | { |
1505 | return (__force sci_t)nla_get_u64(nla); |
1506 | } |
1507 | |
1508 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1509 | int padattr) |
1510 | { |
1511 | return nla_put_u64_64bit(skb, attrtype, value: (__force u64)value, padattr); |
1512 | } |
1513 | |
1514 | static ssci_t nla_get_ssci(const struct nlattr *nla) |
1515 | { |
1516 | return (__force ssci_t)nla_get_u32(nla); |
1517 | } |
1518 | |
1519 | static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value) |
1520 | { |
1521 | return nla_put_u32(skb, attrtype, value: (__force u64)value); |
1522 | } |
1523 | |
1524 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, |
1525 | struct nlattr **attrs, |
1526 | struct nlattr **tb_sa, |
1527 | struct net_device **devp, |
1528 | struct macsec_secy **secyp, |
1529 | struct macsec_tx_sc **scp, |
1530 | u8 *assoc_num) |
1531 | { |
1532 | struct net_device *dev; |
1533 | struct macsec_secy *secy; |
1534 | struct macsec_tx_sc *tx_sc; |
1535 | struct macsec_tx_sa *tx_sa; |
1536 | |
1537 | if (!tb_sa[MACSEC_SA_ATTR_AN]) |
1538 | return ERR_PTR(error: -EINVAL); |
1539 | |
1540 | *assoc_num = nla_get_u8(nla: tb_sa[MACSEC_SA_ATTR_AN]); |
1541 | |
1542 | dev = get_dev_from_nl(net, attrs); |
1543 | if (IS_ERR(ptr: dev)) |
1544 | return ERR_CAST(ptr: dev); |
1545 | |
1546 | if (*assoc_num >= MACSEC_NUM_AN) |
1547 | return ERR_PTR(error: -EINVAL); |
1548 | |
1549 | secy = &macsec_priv(dev)->secy; |
1550 | tx_sc = &secy->tx_sc; |
1551 | |
1552 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); |
1553 | if (!tx_sa) |
1554 | return ERR_PTR(error: -ENODEV); |
1555 | |
1556 | *devp = dev; |
1557 | *scp = tx_sc; |
1558 | *secyp = secy; |
1559 | return tx_sa; |
1560 | } |
1561 | |
1562 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, |
1563 | struct nlattr **attrs, |
1564 | struct nlattr **tb_rxsc, |
1565 | struct net_device **devp, |
1566 | struct macsec_secy **secyp) |
1567 | { |
1568 | struct net_device *dev; |
1569 | struct macsec_secy *secy; |
1570 | struct macsec_rx_sc *rx_sc; |
1571 | sci_t sci; |
1572 | |
1573 | dev = get_dev_from_nl(net, attrs); |
1574 | if (IS_ERR(ptr: dev)) |
1575 | return ERR_CAST(ptr: dev); |
1576 | |
1577 | secy = &macsec_priv(dev)->secy; |
1578 | |
1579 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) |
1580 | return ERR_PTR(error: -EINVAL); |
1581 | |
1582 | sci = nla_get_sci(nla: tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
1583 | rx_sc = find_rx_sc_rtnl(secy, sci); |
1584 | if (!rx_sc) |
1585 | return ERR_PTR(error: -ENODEV); |
1586 | |
1587 | *secyp = secy; |
1588 | *devp = dev; |
1589 | |
1590 | return rx_sc; |
1591 | } |
1592 | |
1593 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, |
1594 | struct nlattr **attrs, |
1595 | struct nlattr **tb_rxsc, |
1596 | struct nlattr **tb_sa, |
1597 | struct net_device **devp, |
1598 | struct macsec_secy **secyp, |
1599 | struct macsec_rx_sc **scp, |
1600 | u8 *assoc_num) |
1601 | { |
1602 | struct macsec_rx_sc *rx_sc; |
1603 | struct macsec_rx_sa *rx_sa; |
1604 | |
1605 | if (!tb_sa[MACSEC_SA_ATTR_AN]) |
1606 | return ERR_PTR(error: -EINVAL); |
1607 | |
1608 | *assoc_num = nla_get_u8(nla: tb_sa[MACSEC_SA_ATTR_AN]); |
1609 | if (*assoc_num >= MACSEC_NUM_AN) |
1610 | return ERR_PTR(error: -EINVAL); |
1611 | |
1612 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); |
1613 | if (IS_ERR(ptr: rx_sc)) |
1614 | return ERR_CAST(ptr: rx_sc); |
1615 | |
1616 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); |
1617 | if (!rx_sa) |
1618 | return ERR_PTR(error: -ENODEV); |
1619 | |
1620 | *scp = rx_sc; |
1621 | return rx_sa; |
1622 | } |
1623 | |
1624 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { |
1625 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, |
1626 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, |
1627 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, |
1628 | [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED }, |
1629 | }; |
1630 | |
1631 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { |
1632 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, |
1633 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, |
1634 | }; |
1635 | |
1636 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { |
1637 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, |
1638 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, |
1639 | [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4), |
1640 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1641 | .len = MACSEC_KEYID_LEN, }, |
1642 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
1643 | .len = MACSEC_MAX_KEY_LEN, }, |
1644 | [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 }, |
1645 | [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY, |
1646 | .len = MACSEC_SALT_LEN, }, |
1647 | }; |
1648 | |
1649 | static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = { |
1650 | [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 }, |
1651 | }; |
1652 | |
1653 | /* Offloads an operation to a device driver */ |
1654 | static int macsec_offload(int (* const func)(struct macsec_context *), |
1655 | struct macsec_context *ctx) |
1656 | { |
1657 | int ret; |
1658 | |
1659 | if (unlikely(!func)) |
1660 | return 0; |
1661 | |
1662 | if (ctx->offload == MACSEC_OFFLOAD_PHY) |
1663 | mutex_lock(&ctx->phydev->lock); |
1664 | |
1665 | ret = (*func)(ctx); |
1666 | |
1667 | if (ctx->offload == MACSEC_OFFLOAD_PHY) |
1668 | mutex_unlock(lock: &ctx->phydev->lock); |
1669 | |
1670 | return ret; |
1671 | } |
1672 | |
1673 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) |
1674 | { |
1675 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) |
1676 | return -EINVAL; |
1677 | |
1678 | if (nla_parse_nested_deprecated(tb: tb_sa, maxtype: MACSEC_SA_ATTR_MAX, nla: attrs[MACSEC_ATTR_SA_CONFIG], policy: macsec_genl_sa_policy, NULL)) |
1679 | return -EINVAL; |
1680 | |
1681 | return 0; |
1682 | } |
1683 | |
1684 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) |
1685 | { |
1686 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) |
1687 | return -EINVAL; |
1688 | |
1689 | if (nla_parse_nested_deprecated(tb: tb_rxsc, maxtype: MACSEC_RXSC_ATTR_MAX, nla: attrs[MACSEC_ATTR_RXSC_CONFIG], policy: macsec_genl_rxsc_policy, NULL)) |
1690 | return -EINVAL; |
1691 | |
1692 | return 0; |
1693 | } |
1694 | |
1695 | static bool validate_add_rxsa(struct nlattr **attrs) |
1696 | { |
1697 | if (!attrs[MACSEC_SA_ATTR_AN] || |
1698 | !attrs[MACSEC_SA_ATTR_KEY] || |
1699 | !attrs[MACSEC_SA_ATTR_KEYID]) |
1700 | return false; |
1701 | |
1702 | if (nla_get_u8(nla: attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) |
1703 | return false; |
1704 | |
1705 | if (attrs[MACSEC_SA_ATTR_PN] && |
1706 | nla_get_u64(nla: attrs[MACSEC_SA_ATTR_PN]) == 0) |
1707 | return false; |
1708 | |
1709 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { |
1710 | if (nla_get_u8(nla: attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) |
1711 | return false; |
1712 | } |
1713 | |
1714 | if (nla_len(nla: attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1715 | return false; |
1716 | |
1717 | return true; |
1718 | } |
1719 | |
1720 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) |
1721 | { |
1722 | struct net_device *dev; |
1723 | struct nlattr **attrs = info->attrs; |
1724 | struct macsec_secy *secy; |
1725 | struct macsec_rx_sc *rx_sc; |
1726 | struct macsec_rx_sa *rx_sa; |
1727 | unsigned char assoc_num; |
1728 | int pn_len; |
1729 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
1730 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
1731 | int err; |
1732 | |
1733 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
1734 | return -EINVAL; |
1735 | |
1736 | if (parse_sa_config(attrs, tb_sa)) |
1737 | return -EINVAL; |
1738 | |
1739 | if (parse_rxsc_config(attrs, tb_rxsc)) |
1740 | return -EINVAL; |
1741 | |
1742 | if (!validate_add_rxsa(attrs: tb_sa)) |
1743 | return -EINVAL; |
1744 | |
1745 | rtnl_lock(); |
1746 | rx_sc = get_rxsc_from_nl(net: genl_info_net(info), attrs, tb_rxsc, devp: &dev, secyp: &secy); |
1747 | if (IS_ERR(ptr: rx_sc)) { |
1748 | rtnl_unlock(); |
1749 | return PTR_ERR(ptr: rx_sc); |
1750 | } |
1751 | |
1752 | assoc_num = nla_get_u8(nla: tb_sa[MACSEC_SA_ATTR_AN]); |
1753 | |
1754 | if (nla_len(nla: tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { |
1755 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n" , |
1756 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); |
1757 | rtnl_unlock(); |
1758 | return -EINVAL; |
1759 | } |
1760 | |
1761 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
1762 | if (tb_sa[MACSEC_SA_ATTR_PN] && |
1763 | nla_len(nla: tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { |
1764 | pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n" , |
1765 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); |
1766 | rtnl_unlock(); |
1767 | return -EINVAL; |
1768 | } |
1769 | |
1770 | if (secy->xpn) { |
1771 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { |
1772 | rtnl_unlock(); |
1773 | return -EINVAL; |
1774 | } |
1775 | |
1776 | if (nla_len(nla: tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { |
1777 | pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n" , |
1778 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), |
1779 | MACSEC_SALT_LEN); |
1780 | rtnl_unlock(); |
1781 | return -EINVAL; |
1782 | } |
1783 | } |
1784 | |
1785 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); |
1786 | if (rx_sa) { |
1787 | rtnl_unlock(); |
1788 | return -EBUSY; |
1789 | } |
1790 | |
1791 | rx_sa = kmalloc(size: sizeof(*rx_sa), GFP_KERNEL); |
1792 | if (!rx_sa) { |
1793 | rtnl_unlock(); |
1794 | return -ENOMEM; |
1795 | } |
1796 | |
1797 | err = init_rx_sa(rx_sa, sak: nla_data(nla: tb_sa[MACSEC_SA_ATTR_KEY]), |
1798 | key_len: secy->key_len, icv_len: secy->icv_len); |
1799 | if (err < 0) { |
1800 | kfree(objp: rx_sa); |
1801 | rtnl_unlock(); |
1802 | return err; |
1803 | } |
1804 | |
1805 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
1806 | spin_lock_bh(lock: &rx_sa->lock); |
1807 | rx_sa->next_pn = nla_get_u64(nla: tb_sa[MACSEC_SA_ATTR_PN]); |
1808 | spin_unlock_bh(lock: &rx_sa->lock); |
1809 | } |
1810 | |
1811 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
1812 | rx_sa->active = !!nla_get_u8(nla: tb_sa[MACSEC_SA_ATTR_ACTIVE]); |
1813 | |
1814 | rx_sa->sc = rx_sc; |
1815 | |
1816 | if (secy->xpn) { |
1817 | rx_sa->ssci = nla_get_ssci(nla: tb_sa[MACSEC_SA_ATTR_SSCI]); |
1818 | nla_memcpy(dest: rx_sa->key.salt.bytes, src: tb_sa[MACSEC_SA_ATTR_SALT], |
1819 | MACSEC_SALT_LEN); |
1820 | } |
1821 | |
1822 | /* If h/w offloading is available, propagate to the device */ |
1823 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
1824 | const struct macsec_ops *ops; |
1825 | struct macsec_context ctx; |
1826 | |
1827 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
1828 | if (!ops) { |
1829 | err = -EOPNOTSUPP; |
1830 | goto cleanup; |
1831 | } |
1832 | |
1833 | ctx.sa.assoc_num = assoc_num; |
1834 | ctx.sa.rx_sa = rx_sa; |
1835 | ctx.secy = secy; |
1836 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1837 | secy->key_len); |
1838 | |
1839 | err = macsec_offload(func: ops->mdo_add_rxsa, ctx: &ctx); |
1840 | memzero_explicit(s: ctx.sa.key, count: secy->key_len); |
1841 | if (err) |
1842 | goto cleanup; |
1843 | } |
1844 | |
1845 | nla_memcpy(dest: rx_sa->key.id, src: tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
1846 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); |
1847 | |
1848 | rtnl_unlock(); |
1849 | |
1850 | return 0; |
1851 | |
1852 | cleanup: |
1853 | macsec_rxsa_put(sa: rx_sa); |
1854 | rtnl_unlock(); |
1855 | return err; |
1856 | } |
1857 | |
1858 | static bool validate_add_rxsc(struct nlattr **attrs) |
1859 | { |
1860 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) |
1861 | return false; |
1862 | |
1863 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { |
1864 | if (nla_get_u8(nla: attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) |
1865 | return false; |
1866 | } |
1867 | |
1868 | return true; |
1869 | } |
1870 | |
1871 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) |
1872 | { |
1873 | struct net_device *dev; |
1874 | sci_t sci = MACSEC_UNDEF_SCI; |
1875 | struct nlattr **attrs = info->attrs; |
1876 | struct macsec_rx_sc *rx_sc; |
1877 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
1878 | struct macsec_secy *secy; |
1879 | bool active = true; |
1880 | int ret; |
1881 | |
1882 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
1883 | return -EINVAL; |
1884 | |
1885 | if (parse_rxsc_config(attrs, tb_rxsc)) |
1886 | return -EINVAL; |
1887 | |
1888 | if (!validate_add_rxsc(attrs: tb_rxsc)) |
1889 | return -EINVAL; |
1890 | |
1891 | rtnl_lock(); |
1892 | dev = get_dev_from_nl(net: genl_info_net(info), attrs); |
1893 | if (IS_ERR(ptr: dev)) { |
1894 | rtnl_unlock(); |
1895 | return PTR_ERR(ptr: dev); |
1896 | } |
1897 | |
1898 | secy = &macsec_priv(dev)->secy; |
1899 | sci = nla_get_sci(nla: tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
1900 | |
1901 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) |
1902 | active = nla_get_u8(nla: tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); |
1903 | |
1904 | rx_sc = create_rx_sc(dev, sci, active); |
1905 | if (IS_ERR(ptr: rx_sc)) { |
1906 | rtnl_unlock(); |
1907 | return PTR_ERR(ptr: rx_sc); |
1908 | } |
1909 | |
1910 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
1911 | const struct macsec_ops *ops; |
1912 | struct macsec_context ctx; |
1913 | |
1914 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
1915 | if (!ops) { |
1916 | ret = -EOPNOTSUPP; |
1917 | goto cleanup; |
1918 | } |
1919 | |
1920 | ctx.rx_sc = rx_sc; |
1921 | ctx.secy = secy; |
1922 | |
1923 | ret = macsec_offload(func: ops->mdo_add_rxsc, ctx: &ctx); |
1924 | if (ret) |
1925 | goto cleanup; |
1926 | } |
1927 | |
1928 | rtnl_unlock(); |
1929 | |
1930 | return 0; |
1931 | |
1932 | cleanup: |
1933 | del_rx_sc(secy, sci); |
1934 | free_rx_sc(rx_sc); |
1935 | rtnl_unlock(); |
1936 | return ret; |
1937 | } |
1938 | |
1939 | static bool validate_add_txsa(struct nlattr **attrs) |
1940 | { |
1941 | if (!attrs[MACSEC_SA_ATTR_AN] || |
1942 | !attrs[MACSEC_SA_ATTR_PN] || |
1943 | !attrs[MACSEC_SA_ATTR_KEY] || |
1944 | !attrs[MACSEC_SA_ATTR_KEYID]) |
1945 | return false; |
1946 | |
1947 | if (nla_get_u8(nla: attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) |
1948 | return false; |
1949 | |
1950 | if (nla_get_u64(nla: attrs[MACSEC_SA_ATTR_PN]) == 0) |
1951 | return false; |
1952 | |
1953 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { |
1954 | if (nla_get_u8(nla: attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) |
1955 | return false; |
1956 | } |
1957 | |
1958 | if (nla_len(nla: attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1959 | return false; |
1960 | |
1961 | return true; |
1962 | } |
1963 | |
1964 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) |
1965 | { |
1966 | struct net_device *dev; |
1967 | struct nlattr **attrs = info->attrs; |
1968 | struct macsec_secy *secy; |
1969 | struct macsec_tx_sc *tx_sc; |
1970 | struct macsec_tx_sa *tx_sa; |
1971 | unsigned char assoc_num; |
1972 | int pn_len; |
1973 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
1974 | bool was_operational; |
1975 | int err; |
1976 | |
1977 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
1978 | return -EINVAL; |
1979 | |
1980 | if (parse_sa_config(attrs, tb_sa)) |
1981 | return -EINVAL; |
1982 | |
1983 | if (!validate_add_txsa(attrs: tb_sa)) |
1984 | return -EINVAL; |
1985 | |
1986 | rtnl_lock(); |
1987 | dev = get_dev_from_nl(net: genl_info_net(info), attrs); |
1988 | if (IS_ERR(ptr: dev)) { |
1989 | rtnl_unlock(); |
1990 | return PTR_ERR(ptr: dev); |
1991 | } |
1992 | |
1993 | secy = &macsec_priv(dev)->secy; |
1994 | tx_sc = &secy->tx_sc; |
1995 | |
1996 | assoc_num = nla_get_u8(nla: tb_sa[MACSEC_SA_ATTR_AN]); |
1997 | |
1998 | if (nla_len(nla: tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { |
1999 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n" , |
2000 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); |
2001 | rtnl_unlock(); |
2002 | return -EINVAL; |
2003 | } |
2004 | |
2005 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
2006 | if (nla_len(nla: tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { |
2007 | pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n" , |
2008 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); |
2009 | rtnl_unlock(); |
2010 | return -EINVAL; |
2011 | } |
2012 | |
2013 | if (secy->xpn) { |
2014 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { |
2015 | rtnl_unlock(); |
2016 | return -EINVAL; |
2017 | } |
2018 | |
2019 | if (nla_len(nla: tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { |
2020 | pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n" , |
2021 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), |
2022 | MACSEC_SALT_LEN); |
2023 | rtnl_unlock(); |
2024 | return -EINVAL; |
2025 | } |
2026 | } |
2027 | |
2028 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); |
2029 | if (tx_sa) { |
2030 | rtnl_unlock(); |
2031 | return -EBUSY; |
2032 | } |
2033 | |
2034 | tx_sa = kmalloc(size: sizeof(*tx_sa), GFP_KERNEL); |
2035 | if (!tx_sa) { |
2036 | rtnl_unlock(); |
2037 | return -ENOMEM; |
2038 | } |
2039 | |
2040 | err = init_tx_sa(tx_sa, sak: nla_data(nla: tb_sa[MACSEC_SA_ATTR_KEY]), |
2041 | key_len: secy->key_len, icv_len: secy->icv_len); |
2042 | if (err < 0) { |
2043 | kfree(objp: tx_sa); |
2044 | rtnl_unlock(); |
2045 | return err; |
2046 | } |
2047 | |
2048 | spin_lock_bh(lock: &tx_sa->lock); |
2049 | tx_sa->next_pn = nla_get_u64(nla: tb_sa[MACSEC_SA_ATTR_PN]); |
2050 | spin_unlock_bh(lock: &tx_sa->lock); |
2051 | |
2052 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2053 | tx_sa->active = !!nla_get_u8(nla: tb_sa[MACSEC_SA_ATTR_ACTIVE]); |
2054 | |
2055 | was_operational = secy->operational; |
2056 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) |
2057 | secy->operational = true; |
2058 | |
2059 | if (secy->xpn) { |
2060 | tx_sa->ssci = nla_get_ssci(nla: tb_sa[MACSEC_SA_ATTR_SSCI]); |
2061 | nla_memcpy(dest: tx_sa->key.salt.bytes, src: tb_sa[MACSEC_SA_ATTR_SALT], |
2062 | MACSEC_SALT_LEN); |
2063 | } |
2064 | |
2065 | /* If h/w offloading is available, propagate to the device */ |
2066 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
2067 | const struct macsec_ops *ops; |
2068 | struct macsec_context ctx; |
2069 | |
2070 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
2071 | if (!ops) { |
2072 | err = -EOPNOTSUPP; |
2073 | goto cleanup; |
2074 | } |
2075 | |
2076 | ctx.sa.assoc_num = assoc_num; |
2077 | ctx.sa.tx_sa = tx_sa; |
2078 | ctx.secy = secy; |
2079 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
2080 | secy->key_len); |
2081 | |
2082 | err = macsec_offload(func: ops->mdo_add_txsa, ctx: &ctx); |
2083 | memzero_explicit(s: ctx.sa.key, count: secy->key_len); |
2084 | if (err) |
2085 | goto cleanup; |
2086 | } |
2087 | |
2088 | nla_memcpy(dest: tx_sa->key.id, src: tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
2089 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); |
2090 | |
2091 | rtnl_unlock(); |
2092 | |
2093 | return 0; |
2094 | |
2095 | cleanup: |
2096 | secy->operational = was_operational; |
2097 | macsec_txsa_put(sa: tx_sa); |
2098 | rtnl_unlock(); |
2099 | return err; |
2100 | } |
2101 | |
2102 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) |
2103 | { |
2104 | struct nlattr **attrs = info->attrs; |
2105 | struct net_device *dev; |
2106 | struct macsec_secy *secy; |
2107 | struct macsec_rx_sc *rx_sc; |
2108 | struct macsec_rx_sa *rx_sa; |
2109 | u8 assoc_num; |
2110 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
2111 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
2112 | int ret; |
2113 | |
2114 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2115 | return -EINVAL; |
2116 | |
2117 | if (parse_sa_config(attrs, tb_sa)) |
2118 | return -EINVAL; |
2119 | |
2120 | if (parse_rxsc_config(attrs, tb_rxsc)) |
2121 | return -EINVAL; |
2122 | |
2123 | rtnl_lock(); |
2124 | rx_sa = get_rxsa_from_nl(net: genl_info_net(info), attrs, tb_rxsc, tb_sa, |
2125 | devp: &dev, secyp: &secy, scp: &rx_sc, assoc_num: &assoc_num); |
2126 | if (IS_ERR(ptr: rx_sa)) { |
2127 | rtnl_unlock(); |
2128 | return PTR_ERR(ptr: rx_sa); |
2129 | } |
2130 | |
2131 | if (rx_sa->active) { |
2132 | rtnl_unlock(); |
2133 | return -EBUSY; |
2134 | } |
2135 | |
2136 | /* If h/w offloading is available, propagate to the device */ |
2137 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
2138 | const struct macsec_ops *ops; |
2139 | struct macsec_context ctx; |
2140 | |
2141 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
2142 | if (!ops) { |
2143 | ret = -EOPNOTSUPP; |
2144 | goto cleanup; |
2145 | } |
2146 | |
2147 | ctx.sa.assoc_num = assoc_num; |
2148 | ctx.sa.rx_sa = rx_sa; |
2149 | ctx.secy = secy; |
2150 | |
2151 | ret = macsec_offload(func: ops->mdo_del_rxsa, ctx: &ctx); |
2152 | if (ret) |
2153 | goto cleanup; |
2154 | } |
2155 | |
2156 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); |
2157 | clear_rx_sa(rx_sa); |
2158 | |
2159 | rtnl_unlock(); |
2160 | |
2161 | return 0; |
2162 | |
2163 | cleanup: |
2164 | rtnl_unlock(); |
2165 | return ret; |
2166 | } |
2167 | |
2168 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) |
2169 | { |
2170 | struct nlattr **attrs = info->attrs; |
2171 | struct net_device *dev; |
2172 | struct macsec_secy *secy; |
2173 | struct macsec_rx_sc *rx_sc; |
2174 | sci_t sci; |
2175 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
2176 | int ret; |
2177 | |
2178 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2179 | return -EINVAL; |
2180 | |
2181 | if (parse_rxsc_config(attrs, tb_rxsc)) |
2182 | return -EINVAL; |
2183 | |
2184 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) |
2185 | return -EINVAL; |
2186 | |
2187 | rtnl_lock(); |
2188 | dev = get_dev_from_nl(net: genl_info_net(info), attrs: info->attrs); |
2189 | if (IS_ERR(ptr: dev)) { |
2190 | rtnl_unlock(); |
2191 | return PTR_ERR(ptr: dev); |
2192 | } |
2193 | |
2194 | secy = &macsec_priv(dev)->secy; |
2195 | sci = nla_get_sci(nla: tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
2196 | |
2197 | rx_sc = del_rx_sc(secy, sci); |
2198 | if (!rx_sc) { |
2199 | rtnl_unlock(); |
2200 | return -ENODEV; |
2201 | } |
2202 | |
2203 | /* If h/w offloading is available, propagate to the device */ |
2204 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
2205 | const struct macsec_ops *ops; |
2206 | struct macsec_context ctx; |
2207 | |
2208 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
2209 | if (!ops) { |
2210 | ret = -EOPNOTSUPP; |
2211 | goto cleanup; |
2212 | } |
2213 | |
2214 | ctx.rx_sc = rx_sc; |
2215 | ctx.secy = secy; |
2216 | ret = macsec_offload(func: ops->mdo_del_rxsc, ctx: &ctx); |
2217 | if (ret) |
2218 | goto cleanup; |
2219 | } |
2220 | |
2221 | free_rx_sc(rx_sc); |
2222 | rtnl_unlock(); |
2223 | |
2224 | return 0; |
2225 | |
2226 | cleanup: |
2227 | rtnl_unlock(); |
2228 | return ret; |
2229 | } |
2230 | |
2231 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) |
2232 | { |
2233 | struct nlattr **attrs = info->attrs; |
2234 | struct net_device *dev; |
2235 | struct macsec_secy *secy; |
2236 | struct macsec_tx_sc *tx_sc; |
2237 | struct macsec_tx_sa *tx_sa; |
2238 | u8 assoc_num; |
2239 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
2240 | int ret; |
2241 | |
2242 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2243 | return -EINVAL; |
2244 | |
2245 | if (parse_sa_config(attrs, tb_sa)) |
2246 | return -EINVAL; |
2247 | |
2248 | rtnl_lock(); |
2249 | tx_sa = get_txsa_from_nl(net: genl_info_net(info), attrs, tb_sa, |
2250 | devp: &dev, secyp: &secy, scp: &tx_sc, assoc_num: &assoc_num); |
2251 | if (IS_ERR(ptr: tx_sa)) { |
2252 | rtnl_unlock(); |
2253 | return PTR_ERR(ptr: tx_sa); |
2254 | } |
2255 | |
2256 | if (tx_sa->active) { |
2257 | rtnl_unlock(); |
2258 | return -EBUSY; |
2259 | } |
2260 | |
2261 | /* If h/w offloading is available, propagate to the device */ |
2262 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
2263 | const struct macsec_ops *ops; |
2264 | struct macsec_context ctx; |
2265 | |
2266 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
2267 | if (!ops) { |
2268 | ret = -EOPNOTSUPP; |
2269 | goto cleanup; |
2270 | } |
2271 | |
2272 | ctx.sa.assoc_num = assoc_num; |
2273 | ctx.sa.tx_sa = tx_sa; |
2274 | ctx.secy = secy; |
2275 | |
2276 | ret = macsec_offload(func: ops->mdo_del_txsa, ctx: &ctx); |
2277 | if (ret) |
2278 | goto cleanup; |
2279 | } |
2280 | |
2281 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); |
2282 | clear_tx_sa(tx_sa); |
2283 | |
2284 | rtnl_unlock(); |
2285 | |
2286 | return 0; |
2287 | |
2288 | cleanup: |
2289 | rtnl_unlock(); |
2290 | return ret; |
2291 | } |
2292 | |
2293 | static bool validate_upd_sa(struct nlattr **attrs) |
2294 | { |
2295 | if (!attrs[MACSEC_SA_ATTR_AN] || |
2296 | attrs[MACSEC_SA_ATTR_KEY] || |
2297 | attrs[MACSEC_SA_ATTR_KEYID] || |
2298 | attrs[MACSEC_SA_ATTR_SSCI] || |
2299 | attrs[MACSEC_SA_ATTR_SALT]) |
2300 | return false; |
2301 | |
2302 | if (nla_get_u8(nla: attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) |
2303 | return false; |
2304 | |
2305 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(nla: attrs[MACSEC_SA_ATTR_PN]) == 0) |
2306 | return false; |
2307 | |
2308 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { |
2309 | if (nla_get_u8(nla: attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) |
2310 | return false; |
2311 | } |
2312 | |
2313 | return true; |
2314 | } |
2315 | |
2316 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) |
2317 | { |
2318 | struct nlattr **attrs = info->attrs; |
2319 | struct net_device *dev; |
2320 | struct macsec_secy *secy; |
2321 | struct macsec_tx_sc *tx_sc; |
2322 | struct macsec_tx_sa *tx_sa; |
2323 | u8 assoc_num; |
2324 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
2325 | bool was_operational, was_active; |
2326 | pn_t prev_pn; |
2327 | int ret = 0; |
2328 | |
2329 | prev_pn.full64 = 0; |
2330 | |
2331 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2332 | return -EINVAL; |
2333 | |
2334 | if (parse_sa_config(attrs, tb_sa)) |
2335 | return -EINVAL; |
2336 | |
2337 | if (!validate_upd_sa(attrs: tb_sa)) |
2338 | return -EINVAL; |
2339 | |
2340 | rtnl_lock(); |
2341 | tx_sa = get_txsa_from_nl(net: genl_info_net(info), attrs, tb_sa, |
2342 | devp: &dev, secyp: &secy, scp: &tx_sc, assoc_num: &assoc_num); |
2343 | if (IS_ERR(ptr: tx_sa)) { |
2344 | rtnl_unlock(); |
2345 | return PTR_ERR(ptr: tx_sa); |
2346 | } |
2347 | |
2348 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
2349 | int pn_len; |
2350 | |
2351 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
2352 | if (nla_len(nla: tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { |
2353 | pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n" , |
2354 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); |
2355 | rtnl_unlock(); |
2356 | return -EINVAL; |
2357 | } |
2358 | |
2359 | spin_lock_bh(lock: &tx_sa->lock); |
2360 | prev_pn = tx_sa->next_pn_halves; |
2361 | tx_sa->next_pn = nla_get_u64(nla: tb_sa[MACSEC_SA_ATTR_PN]); |
2362 | spin_unlock_bh(lock: &tx_sa->lock); |
2363 | } |
2364 | |
2365 | was_active = tx_sa->active; |
2366 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2367 | tx_sa->active = nla_get_u8(nla: tb_sa[MACSEC_SA_ATTR_ACTIVE]); |
2368 | |
2369 | was_operational = secy->operational; |
2370 | if (assoc_num == tx_sc->encoding_sa) |
2371 | secy->operational = tx_sa->active; |
2372 | |
2373 | /* If h/w offloading is available, propagate to the device */ |
2374 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
2375 | const struct macsec_ops *ops; |
2376 | struct macsec_context ctx; |
2377 | |
2378 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
2379 | if (!ops) { |
2380 | ret = -EOPNOTSUPP; |
2381 | goto cleanup; |
2382 | } |
2383 | |
2384 | ctx.sa.assoc_num = assoc_num; |
2385 | ctx.sa.tx_sa = tx_sa; |
2386 | ctx.sa.update_pn = !!prev_pn.full64; |
2387 | ctx.secy = secy; |
2388 | |
2389 | ret = macsec_offload(func: ops->mdo_upd_txsa, ctx: &ctx); |
2390 | if (ret) |
2391 | goto cleanup; |
2392 | } |
2393 | |
2394 | rtnl_unlock(); |
2395 | |
2396 | return 0; |
2397 | |
2398 | cleanup: |
2399 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
2400 | spin_lock_bh(lock: &tx_sa->lock); |
2401 | tx_sa->next_pn_halves = prev_pn; |
2402 | spin_unlock_bh(lock: &tx_sa->lock); |
2403 | } |
2404 | tx_sa->active = was_active; |
2405 | secy->operational = was_operational; |
2406 | rtnl_unlock(); |
2407 | return ret; |
2408 | } |
2409 | |
2410 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) |
2411 | { |
2412 | struct nlattr **attrs = info->attrs; |
2413 | struct net_device *dev; |
2414 | struct macsec_secy *secy; |
2415 | struct macsec_rx_sc *rx_sc; |
2416 | struct macsec_rx_sa *rx_sa; |
2417 | u8 assoc_num; |
2418 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
2419 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
2420 | bool was_active; |
2421 | pn_t prev_pn; |
2422 | int ret = 0; |
2423 | |
2424 | prev_pn.full64 = 0; |
2425 | |
2426 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2427 | return -EINVAL; |
2428 | |
2429 | if (parse_rxsc_config(attrs, tb_rxsc)) |
2430 | return -EINVAL; |
2431 | |
2432 | if (parse_sa_config(attrs, tb_sa)) |
2433 | return -EINVAL; |
2434 | |
2435 | if (!validate_upd_sa(attrs: tb_sa)) |
2436 | return -EINVAL; |
2437 | |
2438 | rtnl_lock(); |
2439 | rx_sa = get_rxsa_from_nl(net: genl_info_net(info), attrs, tb_rxsc, tb_sa, |
2440 | devp: &dev, secyp: &secy, scp: &rx_sc, assoc_num: &assoc_num); |
2441 | if (IS_ERR(ptr: rx_sa)) { |
2442 | rtnl_unlock(); |
2443 | return PTR_ERR(ptr: rx_sa); |
2444 | } |
2445 | |
2446 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
2447 | int pn_len; |
2448 | |
2449 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
2450 | if (nla_len(nla: tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { |
2451 | pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n" , |
2452 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); |
2453 | rtnl_unlock(); |
2454 | return -EINVAL; |
2455 | } |
2456 | |
2457 | spin_lock_bh(lock: &rx_sa->lock); |
2458 | prev_pn = rx_sa->next_pn_halves; |
2459 | rx_sa->next_pn = nla_get_u64(nla: tb_sa[MACSEC_SA_ATTR_PN]); |
2460 | spin_unlock_bh(lock: &rx_sa->lock); |
2461 | } |
2462 | |
2463 | was_active = rx_sa->active; |
2464 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2465 | rx_sa->active = nla_get_u8(nla: tb_sa[MACSEC_SA_ATTR_ACTIVE]); |
2466 | |
2467 | /* If h/w offloading is available, propagate to the device */ |
2468 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
2469 | const struct macsec_ops *ops; |
2470 | struct macsec_context ctx; |
2471 | |
2472 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
2473 | if (!ops) { |
2474 | ret = -EOPNOTSUPP; |
2475 | goto cleanup; |
2476 | } |
2477 | |
2478 | ctx.sa.assoc_num = assoc_num; |
2479 | ctx.sa.rx_sa = rx_sa; |
2480 | ctx.sa.update_pn = !!prev_pn.full64; |
2481 | ctx.secy = secy; |
2482 | |
2483 | ret = macsec_offload(func: ops->mdo_upd_rxsa, ctx: &ctx); |
2484 | if (ret) |
2485 | goto cleanup; |
2486 | } |
2487 | |
2488 | rtnl_unlock(); |
2489 | return 0; |
2490 | |
2491 | cleanup: |
2492 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
2493 | spin_lock_bh(lock: &rx_sa->lock); |
2494 | rx_sa->next_pn_halves = prev_pn; |
2495 | spin_unlock_bh(lock: &rx_sa->lock); |
2496 | } |
2497 | rx_sa->active = was_active; |
2498 | rtnl_unlock(); |
2499 | return ret; |
2500 | } |
2501 | |
2502 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) |
2503 | { |
2504 | struct nlattr **attrs = info->attrs; |
2505 | struct net_device *dev; |
2506 | struct macsec_secy *secy; |
2507 | struct macsec_rx_sc *rx_sc; |
2508 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
2509 | unsigned int prev_n_rx_sc; |
2510 | bool was_active; |
2511 | int ret; |
2512 | |
2513 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2514 | return -EINVAL; |
2515 | |
2516 | if (parse_rxsc_config(attrs, tb_rxsc)) |
2517 | return -EINVAL; |
2518 | |
2519 | if (!validate_add_rxsc(attrs: tb_rxsc)) |
2520 | return -EINVAL; |
2521 | |
2522 | rtnl_lock(); |
2523 | rx_sc = get_rxsc_from_nl(net: genl_info_net(info), attrs, tb_rxsc, devp: &dev, secyp: &secy); |
2524 | if (IS_ERR(ptr: rx_sc)) { |
2525 | rtnl_unlock(); |
2526 | return PTR_ERR(ptr: rx_sc); |
2527 | } |
2528 | |
2529 | was_active = rx_sc->active; |
2530 | prev_n_rx_sc = secy->n_rx_sc; |
2531 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { |
2532 | bool new = !!nla_get_u8(nla: tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); |
2533 | |
2534 | if (rx_sc->active != new) |
2535 | secy->n_rx_sc += new ? 1 : -1; |
2536 | |
2537 | rx_sc->active = new; |
2538 | } |
2539 | |
2540 | /* If h/w offloading is available, propagate to the device */ |
2541 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
2542 | const struct macsec_ops *ops; |
2543 | struct macsec_context ctx; |
2544 | |
2545 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
2546 | if (!ops) { |
2547 | ret = -EOPNOTSUPP; |
2548 | goto cleanup; |
2549 | } |
2550 | |
2551 | ctx.rx_sc = rx_sc; |
2552 | ctx.secy = secy; |
2553 | |
2554 | ret = macsec_offload(func: ops->mdo_upd_rxsc, ctx: &ctx); |
2555 | if (ret) |
2556 | goto cleanup; |
2557 | } |
2558 | |
2559 | rtnl_unlock(); |
2560 | |
2561 | return 0; |
2562 | |
2563 | cleanup: |
2564 | secy->n_rx_sc = prev_n_rx_sc; |
2565 | rx_sc->active = was_active; |
2566 | rtnl_unlock(); |
2567 | return ret; |
2568 | } |
2569 | |
2570 | static bool macsec_is_configured(struct macsec_dev *macsec) |
2571 | { |
2572 | struct macsec_secy *secy = &macsec->secy; |
2573 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
2574 | int i; |
2575 | |
2576 | if (secy->rx_sc) |
2577 | return true; |
2578 | |
2579 | for (i = 0; i < MACSEC_NUM_AN; i++) |
2580 | if (tx_sc->sa[i]) |
2581 | return true; |
2582 | |
2583 | return false; |
2584 | } |
2585 | |
2586 | static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload) |
2587 | { |
2588 | enum macsec_offload prev_offload; |
2589 | const struct macsec_ops *ops; |
2590 | struct macsec_context ctx; |
2591 | struct macsec_dev *macsec; |
2592 | int ret = 0; |
2593 | |
2594 | macsec = macsec_priv(dev); |
2595 | |
2596 | /* Check if the offloading mode is supported by the underlying layers */ |
2597 | if (offload != MACSEC_OFFLOAD_OFF && |
2598 | !macsec_check_offload(offload, macsec)) |
2599 | return -EOPNOTSUPP; |
2600 | |
2601 | /* Check if the net device is busy. */ |
2602 | if (netif_running(dev)) |
2603 | return -EBUSY; |
2604 | |
2605 | /* Check if the device already has rules configured: we do not support |
2606 | * rules migration. |
2607 | */ |
2608 | if (macsec_is_configured(macsec)) |
2609 | return -EBUSY; |
2610 | |
2611 | prev_offload = macsec->offload; |
2612 | |
2613 | ops = __macsec_get_ops(offload: offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload, |
2614 | macsec, ctx: &ctx); |
2615 | if (!ops) |
2616 | return -EOPNOTSUPP; |
2617 | |
2618 | macsec->offload = offload; |
2619 | |
2620 | ctx.secy = &macsec->secy; |
2621 | ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(func: ops->mdo_del_secy, ctx: &ctx) |
2622 | : macsec_offload(func: ops->mdo_add_secy, ctx: &ctx); |
2623 | if (ret) |
2624 | macsec->offload = prev_offload; |
2625 | |
2626 | return ret; |
2627 | } |
2628 | |
2629 | static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info) |
2630 | { |
2631 | struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1]; |
2632 | struct nlattr **attrs = info->attrs; |
2633 | enum macsec_offload offload; |
2634 | struct macsec_dev *macsec; |
2635 | struct net_device *dev; |
2636 | int ret = 0; |
2637 | |
2638 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2639 | return -EINVAL; |
2640 | |
2641 | if (!attrs[MACSEC_ATTR_OFFLOAD]) |
2642 | return -EINVAL; |
2643 | |
2644 | if (nla_parse_nested_deprecated(tb: tb_offload, maxtype: MACSEC_OFFLOAD_ATTR_MAX, |
2645 | nla: attrs[MACSEC_ATTR_OFFLOAD], |
2646 | policy: macsec_genl_offload_policy, NULL)) |
2647 | return -EINVAL; |
2648 | |
2649 | rtnl_lock(); |
2650 | |
2651 | dev = get_dev_from_nl(net: genl_info_net(info), attrs); |
2652 | if (IS_ERR(ptr: dev)) { |
2653 | ret = PTR_ERR(ptr: dev); |
2654 | goto out; |
2655 | } |
2656 | macsec = macsec_priv(dev); |
2657 | |
2658 | if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) { |
2659 | ret = -EINVAL; |
2660 | goto out; |
2661 | } |
2662 | |
2663 | offload = nla_get_u8(nla: tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]); |
2664 | |
2665 | if (macsec->offload != offload) |
2666 | ret = macsec_update_offload(dev, offload); |
2667 | out: |
2668 | rtnl_unlock(); |
2669 | return ret; |
2670 | } |
2671 | |
2672 | static void get_tx_sa_stats(struct net_device *dev, int an, |
2673 | struct macsec_tx_sa *tx_sa, |
2674 | struct macsec_tx_sa_stats *sum) |
2675 | { |
2676 | struct macsec_dev *macsec = macsec_priv(dev); |
2677 | int cpu; |
2678 | |
2679 | /* If h/w offloading is available, propagate to the device */ |
2680 | if (macsec_is_offloaded(macsec)) { |
2681 | const struct macsec_ops *ops; |
2682 | struct macsec_context ctx; |
2683 | |
2684 | ops = macsec_get_ops(macsec, ctx: &ctx); |
2685 | if (ops) { |
2686 | ctx.sa.assoc_num = an; |
2687 | ctx.sa.tx_sa = tx_sa; |
2688 | ctx.stats.tx_sa_stats = sum; |
2689 | ctx.secy = &macsec_priv(dev)->secy; |
2690 | macsec_offload(func: ops->mdo_get_tx_sa_stats, ctx: &ctx); |
2691 | } |
2692 | return; |
2693 | } |
2694 | |
2695 | for_each_possible_cpu(cpu) { |
2696 | const struct macsec_tx_sa_stats *stats = |
2697 | per_cpu_ptr(tx_sa->stats, cpu); |
2698 | |
2699 | sum->OutPktsProtected += stats->OutPktsProtected; |
2700 | sum->OutPktsEncrypted += stats->OutPktsEncrypted; |
2701 | } |
2702 | } |
2703 | |
2704 | static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum) |
2705 | { |
2706 | if (nla_put_u32(skb, attrtype: MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, |
2707 | value: sum->OutPktsProtected) || |
2708 | nla_put_u32(skb, attrtype: MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, |
2709 | value: sum->OutPktsEncrypted)) |
2710 | return -EMSGSIZE; |
2711 | |
2712 | return 0; |
2713 | } |
2714 | |
2715 | static void get_rx_sa_stats(struct net_device *dev, |
2716 | struct macsec_rx_sc *rx_sc, int an, |
2717 | struct macsec_rx_sa *rx_sa, |
2718 | struct macsec_rx_sa_stats *sum) |
2719 | { |
2720 | struct macsec_dev *macsec = macsec_priv(dev); |
2721 | int cpu; |
2722 | |
2723 | /* If h/w offloading is available, propagate to the device */ |
2724 | if (macsec_is_offloaded(macsec)) { |
2725 | const struct macsec_ops *ops; |
2726 | struct macsec_context ctx; |
2727 | |
2728 | ops = macsec_get_ops(macsec, ctx: &ctx); |
2729 | if (ops) { |
2730 | ctx.sa.assoc_num = an; |
2731 | ctx.sa.rx_sa = rx_sa; |
2732 | ctx.stats.rx_sa_stats = sum; |
2733 | ctx.secy = &macsec_priv(dev)->secy; |
2734 | ctx.rx_sc = rx_sc; |
2735 | macsec_offload(func: ops->mdo_get_rx_sa_stats, ctx: &ctx); |
2736 | } |
2737 | return; |
2738 | } |
2739 | |
2740 | for_each_possible_cpu(cpu) { |
2741 | const struct macsec_rx_sa_stats *stats = |
2742 | per_cpu_ptr(rx_sa->stats, cpu); |
2743 | |
2744 | sum->InPktsOK += stats->InPktsOK; |
2745 | sum->InPktsInvalid += stats->InPktsInvalid; |
2746 | sum->InPktsNotValid += stats->InPktsNotValid; |
2747 | sum->InPktsNotUsingSA += stats->InPktsNotUsingSA; |
2748 | sum->InPktsUnusedSA += stats->InPktsUnusedSA; |
2749 | } |
2750 | } |
2751 | |
2752 | static int copy_rx_sa_stats(struct sk_buff *skb, |
2753 | struct macsec_rx_sa_stats *sum) |
2754 | { |
2755 | if (nla_put_u32(skb, attrtype: MACSEC_SA_STATS_ATTR_IN_PKTS_OK, value: sum->InPktsOK) || |
2756 | nla_put_u32(skb, attrtype: MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, |
2757 | value: sum->InPktsInvalid) || |
2758 | nla_put_u32(skb, attrtype: MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, |
2759 | value: sum->InPktsNotValid) || |
2760 | nla_put_u32(skb, attrtype: MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, |
2761 | value: sum->InPktsNotUsingSA) || |
2762 | nla_put_u32(skb, attrtype: MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, |
2763 | value: sum->InPktsUnusedSA)) |
2764 | return -EMSGSIZE; |
2765 | |
2766 | return 0; |
2767 | } |
2768 | |
2769 | static void get_rx_sc_stats(struct net_device *dev, |
2770 | struct macsec_rx_sc *rx_sc, |
2771 | struct macsec_rx_sc_stats *sum) |
2772 | { |
2773 | struct macsec_dev *macsec = macsec_priv(dev); |
2774 | int cpu; |
2775 | |
2776 | /* If h/w offloading is available, propagate to the device */ |
2777 | if (macsec_is_offloaded(macsec)) { |
2778 | const struct macsec_ops *ops; |
2779 | struct macsec_context ctx; |
2780 | |
2781 | ops = macsec_get_ops(macsec, ctx: &ctx); |
2782 | if (ops) { |
2783 | ctx.stats.rx_sc_stats = sum; |
2784 | ctx.secy = &macsec_priv(dev)->secy; |
2785 | ctx.rx_sc = rx_sc; |
2786 | macsec_offload(func: ops->mdo_get_rx_sc_stats, ctx: &ctx); |
2787 | } |
2788 | return; |
2789 | } |
2790 | |
2791 | for_each_possible_cpu(cpu) { |
2792 | const struct pcpu_rx_sc_stats *stats; |
2793 | struct macsec_rx_sc_stats tmp; |
2794 | unsigned int start; |
2795 | |
2796 | stats = per_cpu_ptr(rx_sc->stats, cpu); |
2797 | do { |
2798 | start = u64_stats_fetch_begin(syncp: &stats->syncp); |
2799 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
2800 | } while (u64_stats_fetch_retry(syncp: &stats->syncp, start)); |
2801 | |
2802 | sum->InOctetsValidated += tmp.InOctetsValidated; |
2803 | sum->InOctetsDecrypted += tmp.InOctetsDecrypted; |
2804 | sum->InPktsUnchecked += tmp.InPktsUnchecked; |
2805 | sum->InPktsDelayed += tmp.InPktsDelayed; |
2806 | sum->InPktsOK += tmp.InPktsOK; |
2807 | sum->InPktsInvalid += tmp.InPktsInvalid; |
2808 | sum->InPktsLate += tmp.InPktsLate; |
2809 | sum->InPktsNotValid += tmp.InPktsNotValid; |
2810 | sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA; |
2811 | sum->InPktsUnusedSA += tmp.InPktsUnusedSA; |
2812 | } |
2813 | } |
2814 | |
2815 | static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum) |
2816 | { |
2817 | if (nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
2818 | value: sum->InOctetsValidated, |
2819 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2820 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, |
2821 | value: sum->InOctetsDecrypted, |
2822 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2823 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, |
2824 | value: sum->InPktsUnchecked, |
2825 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2826 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, |
2827 | value: sum->InPktsDelayed, |
2828 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2829 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, |
2830 | value: sum->InPktsOK, |
2831 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2832 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, |
2833 | value: sum->InPktsInvalid, |
2834 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2835 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, |
2836 | value: sum->InPktsLate, |
2837 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2838 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, |
2839 | value: sum->InPktsNotValid, |
2840 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2841 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, |
2842 | value: sum->InPktsNotUsingSA, |
2843 | padattr: MACSEC_RXSC_STATS_ATTR_PAD) || |
2844 | nla_put_u64_64bit(skb, attrtype: MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, |
2845 | value: sum->InPktsUnusedSA, |
2846 | padattr: MACSEC_RXSC_STATS_ATTR_PAD)) |
2847 | return -EMSGSIZE; |
2848 | |
2849 | return 0; |
2850 | } |
2851 | |
2852 | static void get_tx_sc_stats(struct net_device *dev, |
2853 | struct macsec_tx_sc_stats *sum) |
2854 | { |
2855 | struct macsec_dev *macsec = macsec_priv(dev); |
2856 | int cpu; |
2857 | |
2858 | /* If h/w offloading is available, propagate to the device */ |
2859 | if (macsec_is_offloaded(macsec)) { |
2860 | const struct macsec_ops *ops; |
2861 | struct macsec_context ctx; |
2862 | |
2863 | ops = macsec_get_ops(macsec, ctx: &ctx); |
2864 | if (ops) { |
2865 | ctx.stats.tx_sc_stats = sum; |
2866 | ctx.secy = &macsec_priv(dev)->secy; |
2867 | macsec_offload(func: ops->mdo_get_tx_sc_stats, ctx: &ctx); |
2868 | } |
2869 | return; |
2870 | } |
2871 | |
2872 | for_each_possible_cpu(cpu) { |
2873 | const struct pcpu_tx_sc_stats *stats; |
2874 | struct macsec_tx_sc_stats tmp; |
2875 | unsigned int start; |
2876 | |
2877 | stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu); |
2878 | do { |
2879 | start = u64_stats_fetch_begin(syncp: &stats->syncp); |
2880 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
2881 | } while (u64_stats_fetch_retry(syncp: &stats->syncp, start)); |
2882 | |
2883 | sum->OutPktsProtected += tmp.OutPktsProtected; |
2884 | sum->OutPktsEncrypted += tmp.OutPktsEncrypted; |
2885 | sum->OutOctetsProtected += tmp.OutOctetsProtected; |
2886 | sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted; |
2887 | } |
2888 | } |
2889 | |
2890 | static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum) |
2891 | { |
2892 | if (nla_put_u64_64bit(skb, attrtype: MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
2893 | value: sum->OutPktsProtected, |
2894 | padattr: MACSEC_TXSC_STATS_ATTR_PAD) || |
2895 | nla_put_u64_64bit(skb, attrtype: MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, |
2896 | value: sum->OutPktsEncrypted, |
2897 | padattr: MACSEC_TXSC_STATS_ATTR_PAD) || |
2898 | nla_put_u64_64bit(skb, attrtype: MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, |
2899 | value: sum->OutOctetsProtected, |
2900 | padattr: MACSEC_TXSC_STATS_ATTR_PAD) || |
2901 | nla_put_u64_64bit(skb, attrtype: MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, |
2902 | value: sum->OutOctetsEncrypted, |
2903 | padattr: MACSEC_TXSC_STATS_ATTR_PAD)) |
2904 | return -EMSGSIZE; |
2905 | |
2906 | return 0; |
2907 | } |
2908 | |
2909 | static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum) |
2910 | { |
2911 | struct macsec_dev *macsec = macsec_priv(dev); |
2912 | int cpu; |
2913 | |
2914 | /* If h/w offloading is available, propagate to the device */ |
2915 | if (macsec_is_offloaded(macsec)) { |
2916 | const struct macsec_ops *ops; |
2917 | struct macsec_context ctx; |
2918 | |
2919 | ops = macsec_get_ops(macsec, ctx: &ctx); |
2920 | if (ops) { |
2921 | ctx.stats.dev_stats = sum; |
2922 | ctx.secy = &macsec_priv(dev)->secy; |
2923 | macsec_offload(func: ops->mdo_get_dev_stats, ctx: &ctx); |
2924 | } |
2925 | return; |
2926 | } |
2927 | |
2928 | for_each_possible_cpu(cpu) { |
2929 | const struct pcpu_secy_stats *stats; |
2930 | struct macsec_dev_stats tmp; |
2931 | unsigned int start; |
2932 | |
2933 | stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu); |
2934 | do { |
2935 | start = u64_stats_fetch_begin(syncp: &stats->syncp); |
2936 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
2937 | } while (u64_stats_fetch_retry(syncp: &stats->syncp, start)); |
2938 | |
2939 | sum->OutPktsUntagged += tmp.OutPktsUntagged; |
2940 | sum->InPktsUntagged += tmp.InPktsUntagged; |
2941 | sum->OutPktsTooLong += tmp.OutPktsTooLong; |
2942 | sum->InPktsNoTag += tmp.InPktsNoTag; |
2943 | sum->InPktsBadTag += tmp.InPktsBadTag; |
2944 | sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI; |
2945 | sum->InPktsNoSCI += tmp.InPktsNoSCI; |
2946 | sum->InPktsOverrun += tmp.InPktsOverrun; |
2947 | } |
2948 | } |
2949 | |
2950 | static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum) |
2951 | { |
2952 | if (nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
2953 | value: sum->OutPktsUntagged, |
2954 | padattr: MACSEC_SECY_STATS_ATTR_PAD) || |
2955 | nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, |
2956 | value: sum->InPktsUntagged, |
2957 | padattr: MACSEC_SECY_STATS_ATTR_PAD) || |
2958 | nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, |
2959 | value: sum->OutPktsTooLong, |
2960 | padattr: MACSEC_SECY_STATS_ATTR_PAD) || |
2961 | nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, |
2962 | value: sum->InPktsNoTag, |
2963 | padattr: MACSEC_SECY_STATS_ATTR_PAD) || |
2964 | nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, |
2965 | value: sum->InPktsBadTag, |
2966 | padattr: MACSEC_SECY_STATS_ATTR_PAD) || |
2967 | nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, |
2968 | value: sum->InPktsUnknownSCI, |
2969 | padattr: MACSEC_SECY_STATS_ATTR_PAD) || |
2970 | nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, |
2971 | value: sum->InPktsNoSCI, |
2972 | padattr: MACSEC_SECY_STATS_ATTR_PAD) || |
2973 | nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, |
2974 | value: sum->InPktsOverrun, |
2975 | padattr: MACSEC_SECY_STATS_ATTR_PAD)) |
2976 | return -EMSGSIZE; |
2977 | |
2978 | return 0; |
2979 | } |
2980 | |
2981 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) |
2982 | { |
2983 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
2984 | struct nlattr *secy_nest = nla_nest_start_noflag(skb, |
2985 | attrtype: MACSEC_ATTR_SECY); |
2986 | u64 csid; |
2987 | |
2988 | if (!secy_nest) |
2989 | return 1; |
2990 | |
2991 | switch (secy->key_len) { |
2992 | case MACSEC_GCM_AES_128_SAK_LEN: |
2993 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
2994 | break; |
2995 | case MACSEC_GCM_AES_256_SAK_LEN: |
2996 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
2997 | break; |
2998 | default: |
2999 | goto cancel; |
3000 | } |
3001 | |
3002 | if (nla_put_sci(skb, attrtype: MACSEC_SECY_ATTR_SCI, value: secy->sci, |
3003 | padattr: MACSEC_SECY_ATTR_PAD) || |
3004 | nla_put_u64_64bit(skb, attrtype: MACSEC_SECY_ATTR_CIPHER_SUITE, |
3005 | value: csid, padattr: MACSEC_SECY_ATTR_PAD) || |
3006 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_ICV_LEN, value: secy->icv_len) || |
3007 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_OPER, value: secy->operational) || |
3008 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_PROTECT, value: secy->protect_frames) || |
3009 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_REPLAY, value: secy->replay_protect) || |
3010 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_VALIDATE, value: secy->validate_frames) || |
3011 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_ENCRYPT, value: tx_sc->encrypt) || |
3012 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_INC_SCI, value: tx_sc->send_sci) || |
3013 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_ES, value: tx_sc->end_station) || |
3014 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_SCB, value: tx_sc->scb) || |
3015 | nla_put_u8(skb, attrtype: MACSEC_SECY_ATTR_ENCODING_SA, value: tx_sc->encoding_sa)) |
3016 | goto cancel; |
3017 | |
3018 | if (secy->replay_protect) { |
3019 | if (nla_put_u32(skb, attrtype: MACSEC_SECY_ATTR_WINDOW, value: secy->replay_window)) |
3020 | goto cancel; |
3021 | } |
3022 | |
3023 | nla_nest_end(skb, start: secy_nest); |
3024 | return 0; |
3025 | |
3026 | cancel: |
3027 | nla_nest_cancel(skb, start: secy_nest); |
3028 | return 1; |
3029 | } |
3030 | |
3031 | static noinline_for_stack int |
3032 | dump_secy(struct macsec_secy *secy, struct net_device *dev, |
3033 | struct sk_buff *skb, struct netlink_callback *cb) |
3034 | { |
3035 | struct macsec_tx_sc_stats tx_sc_stats = {0, }; |
3036 | struct macsec_tx_sa_stats tx_sa_stats = {0, }; |
3037 | struct macsec_rx_sc_stats rx_sc_stats = {0, }; |
3038 | struct macsec_rx_sa_stats rx_sa_stats = {0, }; |
3039 | struct macsec_dev *macsec = netdev_priv(dev); |
3040 | struct macsec_dev_stats dev_stats = {0, }; |
3041 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
3042 | struct nlattr *txsa_list, *rxsc_list; |
3043 | struct macsec_rx_sc *rx_sc; |
3044 | struct nlattr *attr; |
3045 | void *hdr; |
3046 | int i, j; |
3047 | |
3048 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, seq: cb->nlh->nlmsg_seq, |
3049 | family: &macsec_fam, NLM_F_MULTI, cmd: MACSEC_CMD_GET_TXSC); |
3050 | if (!hdr) |
3051 | return -EMSGSIZE; |
3052 | |
3053 | genl_dump_check_consistent(cb, user_hdr: hdr); |
3054 | |
3055 | if (nla_put_u32(skb, attrtype: MACSEC_ATTR_IFINDEX, value: dev->ifindex)) |
3056 | goto nla_put_failure; |
3057 | |
3058 | attr = nla_nest_start_noflag(skb, attrtype: MACSEC_ATTR_OFFLOAD); |
3059 | if (!attr) |
3060 | goto nla_put_failure; |
3061 | if (nla_put_u8(skb, attrtype: MACSEC_OFFLOAD_ATTR_TYPE, value: macsec->offload)) |
3062 | goto nla_put_failure; |
3063 | nla_nest_end(skb, start: attr); |
3064 | |
3065 | if (nla_put_secy(secy, skb)) |
3066 | goto nla_put_failure; |
3067 | |
3068 | attr = nla_nest_start_noflag(skb, attrtype: MACSEC_ATTR_TXSC_STATS); |
3069 | if (!attr) |
3070 | goto nla_put_failure; |
3071 | |
3072 | get_tx_sc_stats(dev, sum: &tx_sc_stats); |
3073 | if (copy_tx_sc_stats(skb, sum: &tx_sc_stats)) { |
3074 | nla_nest_cancel(skb, start: attr); |
3075 | goto nla_put_failure; |
3076 | } |
3077 | nla_nest_end(skb, start: attr); |
3078 | |
3079 | attr = nla_nest_start_noflag(skb, attrtype: MACSEC_ATTR_SECY_STATS); |
3080 | if (!attr) |
3081 | goto nla_put_failure; |
3082 | get_secy_stats(dev, sum: &dev_stats); |
3083 | if (copy_secy_stats(skb, sum: &dev_stats)) { |
3084 | nla_nest_cancel(skb, start: attr); |
3085 | goto nla_put_failure; |
3086 | } |
3087 | nla_nest_end(skb, start: attr); |
3088 | |
3089 | txsa_list = nla_nest_start_noflag(skb, attrtype: MACSEC_ATTR_TXSA_LIST); |
3090 | if (!txsa_list) |
3091 | goto nla_put_failure; |
3092 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { |
3093 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); |
3094 | struct nlattr *txsa_nest; |
3095 | u64 pn; |
3096 | int pn_len; |
3097 | |
3098 | if (!tx_sa) |
3099 | continue; |
3100 | |
3101 | txsa_nest = nla_nest_start_noflag(skb, attrtype: j++); |
3102 | if (!txsa_nest) { |
3103 | nla_nest_cancel(skb, start: txsa_list); |
3104 | goto nla_put_failure; |
3105 | } |
3106 | |
3107 | attr = nla_nest_start_noflag(skb, attrtype: MACSEC_SA_ATTR_STATS); |
3108 | if (!attr) { |
3109 | nla_nest_cancel(skb, start: txsa_nest); |
3110 | nla_nest_cancel(skb, start: txsa_list); |
3111 | goto nla_put_failure; |
3112 | } |
3113 | memset(&tx_sa_stats, 0, sizeof(tx_sa_stats)); |
3114 | get_tx_sa_stats(dev, an: i, tx_sa, sum: &tx_sa_stats); |
3115 | if (copy_tx_sa_stats(skb, sum: &tx_sa_stats)) { |
3116 | nla_nest_cancel(skb, start: attr); |
3117 | nla_nest_cancel(skb, start: txsa_nest); |
3118 | nla_nest_cancel(skb, start: txsa_list); |
3119 | goto nla_put_failure; |
3120 | } |
3121 | nla_nest_end(skb, start: attr); |
3122 | |
3123 | if (secy->xpn) { |
3124 | pn = tx_sa->next_pn; |
3125 | pn_len = MACSEC_XPN_PN_LEN; |
3126 | } else { |
3127 | pn = tx_sa->next_pn_halves.lower; |
3128 | pn_len = MACSEC_DEFAULT_PN_LEN; |
3129 | } |
3130 | |
3131 | if (nla_put_u8(skb, attrtype: MACSEC_SA_ATTR_AN, value: i) || |
3132 | nla_put(skb, attrtype: MACSEC_SA_ATTR_PN, attrlen: pn_len, data: &pn) || |
3133 | nla_put(skb, attrtype: MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, data: tx_sa->key.id) || |
3134 | (secy->xpn && nla_put_ssci(skb, attrtype: MACSEC_SA_ATTR_SSCI, value: tx_sa->ssci)) || |
3135 | nla_put_u8(skb, attrtype: MACSEC_SA_ATTR_ACTIVE, value: tx_sa->active)) { |
3136 | nla_nest_cancel(skb, start: txsa_nest); |
3137 | nla_nest_cancel(skb, start: txsa_list); |
3138 | goto nla_put_failure; |
3139 | } |
3140 | |
3141 | nla_nest_end(skb, start: txsa_nest); |
3142 | } |
3143 | nla_nest_end(skb, start: txsa_list); |
3144 | |
3145 | rxsc_list = nla_nest_start_noflag(skb, attrtype: MACSEC_ATTR_RXSC_LIST); |
3146 | if (!rxsc_list) |
3147 | goto nla_put_failure; |
3148 | |
3149 | j = 1; |
3150 | for_each_rxsc_rtnl(secy, rx_sc) { |
3151 | int k; |
3152 | struct nlattr *rxsa_list; |
3153 | struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, attrtype: j++); |
3154 | |
3155 | if (!rxsc_nest) { |
3156 | nla_nest_cancel(skb, start: rxsc_list); |
3157 | goto nla_put_failure; |
3158 | } |
3159 | |
3160 | if (nla_put_u8(skb, attrtype: MACSEC_RXSC_ATTR_ACTIVE, value: rx_sc->active) || |
3161 | nla_put_sci(skb, attrtype: MACSEC_RXSC_ATTR_SCI, value: rx_sc->sci, |
3162 | padattr: MACSEC_RXSC_ATTR_PAD)) { |
3163 | nla_nest_cancel(skb, start: rxsc_nest); |
3164 | nla_nest_cancel(skb, start: rxsc_list); |
3165 | goto nla_put_failure; |
3166 | } |
3167 | |
3168 | attr = nla_nest_start_noflag(skb, attrtype: MACSEC_RXSC_ATTR_STATS); |
3169 | if (!attr) { |
3170 | nla_nest_cancel(skb, start: rxsc_nest); |
3171 | nla_nest_cancel(skb, start: rxsc_list); |
3172 | goto nla_put_failure; |
3173 | } |
3174 | memset(&rx_sc_stats, 0, sizeof(rx_sc_stats)); |
3175 | get_rx_sc_stats(dev, rx_sc, sum: &rx_sc_stats); |
3176 | if (copy_rx_sc_stats(skb, sum: &rx_sc_stats)) { |
3177 | nla_nest_cancel(skb, start: attr); |
3178 | nla_nest_cancel(skb, start: rxsc_nest); |
3179 | nla_nest_cancel(skb, start: rxsc_list); |
3180 | goto nla_put_failure; |
3181 | } |
3182 | nla_nest_end(skb, start: attr); |
3183 | |
3184 | rxsa_list = nla_nest_start_noflag(skb, |
3185 | attrtype: MACSEC_RXSC_ATTR_SA_LIST); |
3186 | if (!rxsa_list) { |
3187 | nla_nest_cancel(skb, start: rxsc_nest); |
3188 | nla_nest_cancel(skb, start: rxsc_list); |
3189 | goto nla_put_failure; |
3190 | } |
3191 | |
3192 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { |
3193 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); |
3194 | struct nlattr *rxsa_nest; |
3195 | u64 pn; |
3196 | int pn_len; |
3197 | |
3198 | if (!rx_sa) |
3199 | continue; |
3200 | |
3201 | rxsa_nest = nla_nest_start_noflag(skb, attrtype: k++); |
3202 | if (!rxsa_nest) { |
3203 | nla_nest_cancel(skb, start: rxsa_list); |
3204 | nla_nest_cancel(skb, start: rxsc_nest); |
3205 | nla_nest_cancel(skb, start: rxsc_list); |
3206 | goto nla_put_failure; |
3207 | } |
3208 | |
3209 | attr = nla_nest_start_noflag(skb, |
3210 | attrtype: MACSEC_SA_ATTR_STATS); |
3211 | if (!attr) { |
3212 | nla_nest_cancel(skb, start: rxsa_list); |
3213 | nla_nest_cancel(skb, start: rxsc_nest); |
3214 | nla_nest_cancel(skb, start: rxsc_list); |
3215 | goto nla_put_failure; |
3216 | } |
3217 | memset(&rx_sa_stats, 0, sizeof(rx_sa_stats)); |
3218 | get_rx_sa_stats(dev, rx_sc, an: i, rx_sa, sum: &rx_sa_stats); |
3219 | if (copy_rx_sa_stats(skb, sum: &rx_sa_stats)) { |
3220 | nla_nest_cancel(skb, start: attr); |
3221 | nla_nest_cancel(skb, start: rxsa_list); |
3222 | nla_nest_cancel(skb, start: rxsc_nest); |
3223 | nla_nest_cancel(skb, start: rxsc_list); |
3224 | goto nla_put_failure; |
3225 | } |
3226 | nla_nest_end(skb, start: attr); |
3227 | |
3228 | if (secy->xpn) { |
3229 | pn = rx_sa->next_pn; |
3230 | pn_len = MACSEC_XPN_PN_LEN; |
3231 | } else { |
3232 | pn = rx_sa->next_pn_halves.lower; |
3233 | pn_len = MACSEC_DEFAULT_PN_LEN; |
3234 | } |
3235 | |
3236 | if (nla_put_u8(skb, attrtype: MACSEC_SA_ATTR_AN, value: i) || |
3237 | nla_put(skb, attrtype: MACSEC_SA_ATTR_PN, attrlen: pn_len, data: &pn) || |
3238 | nla_put(skb, attrtype: MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, data: rx_sa->key.id) || |
3239 | (secy->xpn && nla_put_ssci(skb, attrtype: MACSEC_SA_ATTR_SSCI, value: rx_sa->ssci)) || |
3240 | nla_put_u8(skb, attrtype: MACSEC_SA_ATTR_ACTIVE, value: rx_sa->active)) { |
3241 | nla_nest_cancel(skb, start: rxsa_nest); |
3242 | nla_nest_cancel(skb, start: rxsc_nest); |
3243 | nla_nest_cancel(skb, start: rxsc_list); |
3244 | goto nla_put_failure; |
3245 | } |
3246 | nla_nest_end(skb, start: rxsa_nest); |
3247 | } |
3248 | |
3249 | nla_nest_end(skb, start: rxsa_list); |
3250 | nla_nest_end(skb, start: rxsc_nest); |
3251 | } |
3252 | |
3253 | nla_nest_end(skb, start: rxsc_list); |
3254 | |
3255 | genlmsg_end(skb, hdr); |
3256 | |
3257 | return 0; |
3258 | |
3259 | nla_put_failure: |
3260 | genlmsg_cancel(skb, hdr); |
3261 | return -EMSGSIZE; |
3262 | } |
3263 | |
3264 | static int macsec_generation = 1; /* protected by RTNL */ |
3265 | |
3266 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
3267 | { |
3268 | struct net *net = sock_net(sk: skb->sk); |
3269 | struct net_device *dev; |
3270 | int dev_idx, d; |
3271 | |
3272 | dev_idx = cb->args[0]; |
3273 | |
3274 | d = 0; |
3275 | rtnl_lock(); |
3276 | |
3277 | cb->seq = macsec_generation; |
3278 | |
3279 | for_each_netdev(net, dev) { |
3280 | struct macsec_secy *secy; |
3281 | |
3282 | if (d < dev_idx) |
3283 | goto next; |
3284 | |
3285 | if (!netif_is_macsec(dev)) |
3286 | goto next; |
3287 | |
3288 | secy = &macsec_priv(dev)->secy; |
3289 | if (dump_secy(secy, dev, skb, cb) < 0) |
3290 | goto done; |
3291 | next: |
3292 | d++; |
3293 | } |
3294 | |
3295 | done: |
3296 | rtnl_unlock(); |
3297 | cb->args[0] = d; |
3298 | return skb->len; |
3299 | } |
3300 | |
3301 | static const struct genl_small_ops macsec_genl_ops[] = { |
3302 | { |
3303 | .cmd = MACSEC_CMD_GET_TXSC, |
3304 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3305 | .dumpit = macsec_dump_txsc, |
3306 | }, |
3307 | { |
3308 | .cmd = MACSEC_CMD_ADD_RXSC, |
3309 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3310 | .doit = macsec_add_rxsc, |
3311 | .flags = GENL_ADMIN_PERM, |
3312 | }, |
3313 | { |
3314 | .cmd = MACSEC_CMD_DEL_RXSC, |
3315 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3316 | .doit = macsec_del_rxsc, |
3317 | .flags = GENL_ADMIN_PERM, |
3318 | }, |
3319 | { |
3320 | .cmd = MACSEC_CMD_UPD_RXSC, |
3321 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3322 | .doit = macsec_upd_rxsc, |
3323 | .flags = GENL_ADMIN_PERM, |
3324 | }, |
3325 | { |
3326 | .cmd = MACSEC_CMD_ADD_TXSA, |
3327 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3328 | .doit = macsec_add_txsa, |
3329 | .flags = GENL_ADMIN_PERM, |
3330 | }, |
3331 | { |
3332 | .cmd = MACSEC_CMD_DEL_TXSA, |
3333 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3334 | .doit = macsec_del_txsa, |
3335 | .flags = GENL_ADMIN_PERM, |
3336 | }, |
3337 | { |
3338 | .cmd = MACSEC_CMD_UPD_TXSA, |
3339 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3340 | .doit = macsec_upd_txsa, |
3341 | .flags = GENL_ADMIN_PERM, |
3342 | }, |
3343 | { |
3344 | .cmd = MACSEC_CMD_ADD_RXSA, |
3345 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3346 | .doit = macsec_add_rxsa, |
3347 | .flags = GENL_ADMIN_PERM, |
3348 | }, |
3349 | { |
3350 | .cmd = MACSEC_CMD_DEL_RXSA, |
3351 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3352 | .doit = macsec_del_rxsa, |
3353 | .flags = GENL_ADMIN_PERM, |
3354 | }, |
3355 | { |
3356 | .cmd = MACSEC_CMD_UPD_RXSA, |
3357 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3358 | .doit = macsec_upd_rxsa, |
3359 | .flags = GENL_ADMIN_PERM, |
3360 | }, |
3361 | { |
3362 | .cmd = MACSEC_CMD_UPD_OFFLOAD, |
3363 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
3364 | .doit = macsec_upd_offload, |
3365 | .flags = GENL_ADMIN_PERM, |
3366 | }, |
3367 | }; |
3368 | |
3369 | static struct genl_family macsec_fam __ro_after_init = { |
3370 | .name = MACSEC_GENL_NAME, |
3371 | .hdrsize = 0, |
3372 | .version = MACSEC_GENL_VERSION, |
3373 | .maxattr = MACSEC_ATTR_MAX, |
3374 | .policy = macsec_genl_policy, |
3375 | .netnsok = true, |
3376 | .module = THIS_MODULE, |
3377 | .small_ops = macsec_genl_ops, |
3378 | .n_small_ops = ARRAY_SIZE(macsec_genl_ops), |
3379 | .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1, |
3380 | }; |
3381 | |
3382 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
3383 | struct net_device *dev) |
3384 | { |
3385 | struct macsec_dev *macsec = netdev_priv(dev); |
3386 | struct macsec_secy *secy = &macsec->secy; |
3387 | struct pcpu_secy_stats *secy_stats; |
3388 | int ret, len; |
3389 | |
3390 | if (macsec_is_offloaded(macsec: netdev_priv(dev))) { |
3391 | struct metadata_dst *md_dst = secy->tx_sc.md_dst; |
3392 | |
3393 | skb_dst_drop(skb); |
3394 | dst_hold(dst: &md_dst->dst); |
3395 | skb_dst_set(skb, dst: &md_dst->dst); |
3396 | skb->dev = macsec->real_dev; |
3397 | return dev_queue_xmit(skb); |
3398 | } |
3399 | |
3400 | /* 10.5 */ |
3401 | if (!secy->protect_frames) { |
3402 | secy_stats = this_cpu_ptr(macsec->stats); |
3403 | u64_stats_update_begin(syncp: &secy_stats->syncp); |
3404 | secy_stats->stats.OutPktsUntagged++; |
3405 | u64_stats_update_end(syncp: &secy_stats->syncp); |
3406 | skb->dev = macsec->real_dev; |
3407 | len = skb->len; |
3408 | ret = dev_queue_xmit(skb); |
3409 | count_tx(dev, ret, len); |
3410 | return ret; |
3411 | } |
3412 | |
3413 | if (!secy->operational) { |
3414 | kfree_skb(skb); |
3415 | DEV_STATS_INC(dev, tx_dropped); |
3416 | return NETDEV_TX_OK; |
3417 | } |
3418 | |
3419 | len = skb->len; |
3420 | skb = macsec_encrypt(skb, dev); |
3421 | if (IS_ERR(ptr: skb)) { |
3422 | if (PTR_ERR(ptr: skb) != -EINPROGRESS) |
3423 | DEV_STATS_INC(dev, tx_dropped); |
3424 | return NETDEV_TX_OK; |
3425 | } |
3426 | |
3427 | macsec_count_tx(skb, tx_sc: &macsec->secy.tx_sc, tx_sa: macsec_skb_cb(skb)->tx_sa); |
3428 | |
3429 | macsec_encrypt_finish(skb, dev); |
3430 | ret = dev_queue_xmit(skb); |
3431 | count_tx(dev, ret, len); |
3432 | return ret; |
3433 | } |
3434 | |
3435 | #define MACSEC_FEATURES \ |
3436 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) |
3437 | |
3438 | static int macsec_dev_init(struct net_device *dev) |
3439 | { |
3440 | struct macsec_dev *macsec = macsec_priv(dev); |
3441 | struct net_device *real_dev = macsec->real_dev; |
3442 | int err; |
3443 | |
3444 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
3445 | if (!dev->tstats) |
3446 | return -ENOMEM; |
3447 | |
3448 | err = gro_cells_init(gcells: &macsec->gro_cells, dev); |
3449 | if (err) { |
3450 | free_percpu(pdata: dev->tstats); |
3451 | return err; |
3452 | } |
3453 | |
3454 | dev->features = real_dev->features & MACSEC_FEATURES; |
3455 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; |
3456 | |
3457 | dev->needed_headroom = real_dev->needed_headroom + |
3458 | MACSEC_NEEDED_HEADROOM; |
3459 | dev->needed_tailroom = real_dev->needed_tailroom + |
3460 | MACSEC_NEEDED_TAILROOM; |
3461 | |
3462 | if (is_zero_ether_addr(addr: dev->dev_addr)) |
3463 | eth_hw_addr_inherit(dst: dev, src: real_dev); |
3464 | if (is_zero_ether_addr(addr: dev->broadcast)) |
3465 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); |
3466 | |
3467 | /* Get macsec's reference to real_dev */ |
3468 | netdev_hold(dev: real_dev, tracker: &macsec->dev_tracker, GFP_KERNEL); |
3469 | |
3470 | return 0; |
3471 | } |
3472 | |
3473 | static void macsec_dev_uninit(struct net_device *dev) |
3474 | { |
3475 | struct macsec_dev *macsec = macsec_priv(dev); |
3476 | |
3477 | gro_cells_destroy(gcells: &macsec->gro_cells); |
3478 | free_percpu(pdata: dev->tstats); |
3479 | } |
3480 | |
3481 | static netdev_features_t macsec_fix_features(struct net_device *dev, |
3482 | netdev_features_t features) |
3483 | { |
3484 | struct macsec_dev *macsec = macsec_priv(dev); |
3485 | struct net_device *real_dev = macsec->real_dev; |
3486 | |
3487 | features &= (real_dev->features & MACSEC_FEATURES) | |
3488 | NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; |
3489 | features |= NETIF_F_LLTX; |
3490 | |
3491 | return features; |
3492 | } |
3493 | |
3494 | static int macsec_dev_open(struct net_device *dev) |
3495 | { |
3496 | struct macsec_dev *macsec = macsec_priv(dev); |
3497 | struct net_device *real_dev = macsec->real_dev; |
3498 | int err; |
3499 | |
3500 | err = dev_uc_add(dev: real_dev, addr: dev->dev_addr); |
3501 | if (err < 0) |
3502 | return err; |
3503 | |
3504 | if (dev->flags & IFF_ALLMULTI) { |
3505 | err = dev_set_allmulti(dev: real_dev, inc: 1); |
3506 | if (err < 0) |
3507 | goto del_unicast; |
3508 | } |
3509 | |
3510 | if (dev->flags & IFF_PROMISC) { |
3511 | err = dev_set_promiscuity(dev: real_dev, inc: 1); |
3512 | if (err < 0) |
3513 | goto clear_allmulti; |
3514 | } |
3515 | |
3516 | /* If h/w offloading is available, propagate to the device */ |
3517 | if (macsec_is_offloaded(macsec)) { |
3518 | const struct macsec_ops *ops; |
3519 | struct macsec_context ctx; |
3520 | |
3521 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
3522 | if (!ops) { |
3523 | err = -EOPNOTSUPP; |
3524 | goto clear_allmulti; |
3525 | } |
3526 | |
3527 | ctx.secy = &macsec->secy; |
3528 | err = macsec_offload(func: ops->mdo_dev_open, ctx: &ctx); |
3529 | if (err) |
3530 | goto clear_allmulti; |
3531 | } |
3532 | |
3533 | if (netif_carrier_ok(dev: real_dev)) |
3534 | netif_carrier_on(dev); |
3535 | |
3536 | return 0; |
3537 | clear_allmulti: |
3538 | if (dev->flags & IFF_ALLMULTI) |
3539 | dev_set_allmulti(dev: real_dev, inc: -1); |
3540 | del_unicast: |
3541 | dev_uc_del(dev: real_dev, addr: dev->dev_addr); |
3542 | netif_carrier_off(dev); |
3543 | return err; |
3544 | } |
3545 | |
3546 | static int macsec_dev_stop(struct net_device *dev) |
3547 | { |
3548 | struct macsec_dev *macsec = macsec_priv(dev); |
3549 | struct net_device *real_dev = macsec->real_dev; |
3550 | |
3551 | netif_carrier_off(dev); |
3552 | |
3553 | /* If h/w offloading is available, propagate to the device */ |
3554 | if (macsec_is_offloaded(macsec)) { |
3555 | const struct macsec_ops *ops; |
3556 | struct macsec_context ctx; |
3557 | |
3558 | ops = macsec_get_ops(macsec, ctx: &ctx); |
3559 | if (ops) { |
3560 | ctx.secy = &macsec->secy; |
3561 | macsec_offload(func: ops->mdo_dev_stop, ctx: &ctx); |
3562 | } |
3563 | } |
3564 | |
3565 | dev_mc_unsync(to: real_dev, from: dev); |
3566 | dev_uc_unsync(to: real_dev, from: dev); |
3567 | |
3568 | if (dev->flags & IFF_ALLMULTI) |
3569 | dev_set_allmulti(dev: real_dev, inc: -1); |
3570 | |
3571 | if (dev->flags & IFF_PROMISC) |
3572 | dev_set_promiscuity(dev: real_dev, inc: -1); |
3573 | |
3574 | dev_uc_del(dev: real_dev, addr: dev->dev_addr); |
3575 | |
3576 | return 0; |
3577 | } |
3578 | |
3579 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) |
3580 | { |
3581 | struct net_device *real_dev = macsec_priv(dev)->real_dev; |
3582 | |
3583 | if (!(dev->flags & IFF_UP)) |
3584 | return; |
3585 | |
3586 | if (change & IFF_ALLMULTI) |
3587 | dev_set_allmulti(dev: real_dev, inc: dev->flags & IFF_ALLMULTI ? 1 : -1); |
3588 | |
3589 | if (change & IFF_PROMISC) |
3590 | dev_set_promiscuity(dev: real_dev, |
3591 | inc: dev->flags & IFF_PROMISC ? 1 : -1); |
3592 | } |
3593 | |
3594 | static void macsec_dev_set_rx_mode(struct net_device *dev) |
3595 | { |
3596 | struct net_device *real_dev = macsec_priv(dev)->real_dev; |
3597 | |
3598 | dev_mc_sync(to: real_dev, from: dev); |
3599 | dev_uc_sync(to: real_dev, from: dev); |
3600 | } |
3601 | |
3602 | static int macsec_set_mac_address(struct net_device *dev, void *p) |
3603 | { |
3604 | struct macsec_dev *macsec = macsec_priv(dev); |
3605 | struct net_device *real_dev = macsec->real_dev; |
3606 | struct sockaddr *addr = p; |
3607 | int err; |
3608 | |
3609 | if (!is_valid_ether_addr(addr: addr->sa_data)) |
3610 | return -EADDRNOTAVAIL; |
3611 | |
3612 | if (!(dev->flags & IFF_UP)) |
3613 | goto out; |
3614 | |
3615 | err = dev_uc_add(dev: real_dev, addr: addr->sa_data); |
3616 | if (err < 0) |
3617 | return err; |
3618 | |
3619 | dev_uc_del(dev: real_dev, addr: dev->dev_addr); |
3620 | |
3621 | out: |
3622 | eth_hw_addr_set(dev, addr: addr->sa_data); |
3623 | |
3624 | /* If h/w offloading is available, propagate to the device */ |
3625 | if (macsec_is_offloaded(macsec)) { |
3626 | const struct macsec_ops *ops; |
3627 | struct macsec_context ctx; |
3628 | |
3629 | ops = macsec_get_ops(macsec, ctx: &ctx); |
3630 | if (ops) { |
3631 | ctx.secy = &macsec->secy; |
3632 | macsec_offload(func: ops->mdo_upd_secy, ctx: &ctx); |
3633 | } |
3634 | } |
3635 | |
3636 | return 0; |
3637 | } |
3638 | |
3639 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) |
3640 | { |
3641 | struct macsec_dev *macsec = macsec_priv(dev); |
3642 | unsigned int = macsec->secy.icv_len + macsec_extra_len(sci_present: true); |
3643 | |
3644 | if (macsec->real_dev->mtu - extra < new_mtu) |
3645 | return -ERANGE; |
3646 | |
3647 | dev->mtu = new_mtu; |
3648 | |
3649 | return 0; |
3650 | } |
3651 | |
3652 | static void macsec_get_stats64(struct net_device *dev, |
3653 | struct rtnl_link_stats64 *s) |
3654 | { |
3655 | if (!dev->tstats) |
3656 | return; |
3657 | |
3658 | dev_fetch_sw_netstats(s, netstats: dev->tstats); |
3659 | |
3660 | s->rx_dropped = DEV_STATS_READ(dev, rx_dropped); |
3661 | s->tx_dropped = DEV_STATS_READ(dev, tx_dropped); |
3662 | s->rx_errors = DEV_STATS_READ(dev, rx_errors); |
3663 | } |
3664 | |
3665 | static int macsec_get_iflink(const struct net_device *dev) |
3666 | { |
3667 | return macsec_priv(dev)->real_dev->ifindex; |
3668 | } |
3669 | |
3670 | static const struct net_device_ops macsec_netdev_ops = { |
3671 | .ndo_init = macsec_dev_init, |
3672 | .ndo_uninit = macsec_dev_uninit, |
3673 | .ndo_open = macsec_dev_open, |
3674 | .ndo_stop = macsec_dev_stop, |
3675 | .ndo_fix_features = macsec_fix_features, |
3676 | .ndo_change_mtu = macsec_change_mtu, |
3677 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, |
3678 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, |
3679 | .ndo_set_mac_address = macsec_set_mac_address, |
3680 | .ndo_start_xmit = macsec_start_xmit, |
3681 | .ndo_get_stats64 = macsec_get_stats64, |
3682 | .ndo_get_iflink = macsec_get_iflink, |
3683 | }; |
3684 | |
3685 | static const struct device_type macsec_type = { |
3686 | .name = "macsec" , |
3687 | }; |
3688 | |
3689 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { |
3690 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, |
3691 | [IFLA_MACSEC_PORT] = { .type = NLA_U16 }, |
3692 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, |
3693 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, |
3694 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, |
3695 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, |
3696 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, |
3697 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, |
3698 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, |
3699 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, |
3700 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, |
3701 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, |
3702 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, |
3703 | [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 }, |
3704 | }; |
3705 | |
3706 | static void macsec_free_netdev(struct net_device *dev) |
3707 | { |
3708 | struct macsec_dev *macsec = macsec_priv(dev); |
3709 | |
3710 | if (macsec->secy.tx_sc.md_dst) |
3711 | metadata_dst_free(macsec->secy.tx_sc.md_dst); |
3712 | free_percpu(pdata: macsec->stats); |
3713 | free_percpu(pdata: macsec->secy.tx_sc.stats); |
3714 | |
3715 | /* Get rid of the macsec's reference to real_dev */ |
3716 | netdev_put(dev: macsec->real_dev, tracker: &macsec->dev_tracker); |
3717 | } |
3718 | |
3719 | static void macsec_setup(struct net_device *dev) |
3720 | { |
3721 | ether_setup(dev); |
3722 | dev->min_mtu = 0; |
3723 | dev->max_mtu = ETH_MAX_MTU; |
3724 | dev->priv_flags |= IFF_NO_QUEUE; |
3725 | dev->netdev_ops = &macsec_netdev_ops; |
3726 | dev->needs_free_netdev = true; |
3727 | dev->priv_destructor = macsec_free_netdev; |
3728 | SET_NETDEV_DEVTYPE(dev, &macsec_type); |
3729 | |
3730 | eth_zero_addr(addr: dev->broadcast); |
3731 | } |
3732 | |
3733 | static int macsec_changelink_common(struct net_device *dev, |
3734 | struct nlattr *data[]) |
3735 | { |
3736 | struct macsec_secy *secy; |
3737 | struct macsec_tx_sc *tx_sc; |
3738 | |
3739 | secy = &macsec_priv(dev)->secy; |
3740 | tx_sc = &secy->tx_sc; |
3741 | |
3742 | if (data[IFLA_MACSEC_ENCODING_SA]) { |
3743 | struct macsec_tx_sa *tx_sa; |
3744 | |
3745 | tx_sc->encoding_sa = nla_get_u8(nla: data[IFLA_MACSEC_ENCODING_SA]); |
3746 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); |
3747 | |
3748 | secy->operational = tx_sa && tx_sa->active; |
3749 | } |
3750 | |
3751 | if (data[IFLA_MACSEC_ENCRYPT]) |
3752 | tx_sc->encrypt = !!nla_get_u8(nla: data[IFLA_MACSEC_ENCRYPT]); |
3753 | |
3754 | if (data[IFLA_MACSEC_PROTECT]) |
3755 | secy->protect_frames = !!nla_get_u8(nla: data[IFLA_MACSEC_PROTECT]); |
3756 | |
3757 | if (data[IFLA_MACSEC_INC_SCI]) |
3758 | tx_sc->send_sci = !!nla_get_u8(nla: data[IFLA_MACSEC_INC_SCI]); |
3759 | |
3760 | if (data[IFLA_MACSEC_ES]) |
3761 | tx_sc->end_station = !!nla_get_u8(nla: data[IFLA_MACSEC_ES]); |
3762 | |
3763 | if (data[IFLA_MACSEC_SCB]) |
3764 | tx_sc->scb = !!nla_get_u8(nla: data[IFLA_MACSEC_SCB]); |
3765 | |
3766 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) |
3767 | secy->replay_protect = !!nla_get_u8(nla: data[IFLA_MACSEC_REPLAY_PROTECT]); |
3768 | |
3769 | if (data[IFLA_MACSEC_VALIDATION]) |
3770 | secy->validate_frames = nla_get_u8(nla: data[IFLA_MACSEC_VALIDATION]); |
3771 | |
3772 | if (data[IFLA_MACSEC_CIPHER_SUITE]) { |
3773 | switch (nla_get_u64(nla: data[IFLA_MACSEC_CIPHER_SUITE])) { |
3774 | case MACSEC_CIPHER_ID_GCM_AES_128: |
3775 | case MACSEC_DEFAULT_CIPHER_ID: |
3776 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
3777 | secy->xpn = false; |
3778 | break; |
3779 | case MACSEC_CIPHER_ID_GCM_AES_256: |
3780 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; |
3781 | secy->xpn = false; |
3782 | break; |
3783 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: |
3784 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
3785 | secy->xpn = true; |
3786 | break; |
3787 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: |
3788 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; |
3789 | secy->xpn = true; |
3790 | break; |
3791 | default: |
3792 | return -EINVAL; |
3793 | } |
3794 | } |
3795 | |
3796 | if (data[IFLA_MACSEC_WINDOW]) { |
3797 | secy->replay_window = nla_get_u32(nla: data[IFLA_MACSEC_WINDOW]); |
3798 | |
3799 | /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window |
3800 | * for XPN cipher suites */ |
3801 | if (secy->xpn && |
3802 | secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW) |
3803 | return -EINVAL; |
3804 | } |
3805 | |
3806 | return 0; |
3807 | } |
3808 | |
3809 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], |
3810 | struct nlattr *data[], |
3811 | struct netlink_ext_ack *extack) |
3812 | { |
3813 | struct macsec_dev *macsec = macsec_priv(dev); |
3814 | bool macsec_offload_state_change = false; |
3815 | enum macsec_offload offload; |
3816 | struct macsec_tx_sc tx_sc; |
3817 | struct macsec_secy secy; |
3818 | int ret; |
3819 | |
3820 | if (!data) |
3821 | return 0; |
3822 | |
3823 | if (data[IFLA_MACSEC_CIPHER_SUITE] || |
3824 | data[IFLA_MACSEC_ICV_LEN] || |
3825 | data[IFLA_MACSEC_SCI] || |
3826 | data[IFLA_MACSEC_PORT]) |
3827 | return -EINVAL; |
3828 | |
3829 | /* Keep a copy of unmodified secy and tx_sc, in case the offload |
3830 | * propagation fails, to revert macsec_changelink_common. |
3831 | */ |
3832 | memcpy(&secy, &macsec->secy, sizeof(secy)); |
3833 | memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc)); |
3834 | |
3835 | ret = macsec_changelink_common(dev, data); |
3836 | if (ret) |
3837 | goto cleanup; |
3838 | |
3839 | if (data[IFLA_MACSEC_OFFLOAD]) { |
3840 | offload = nla_get_u8(nla: data[IFLA_MACSEC_OFFLOAD]); |
3841 | if (macsec->offload != offload) { |
3842 | macsec_offload_state_change = true; |
3843 | ret = macsec_update_offload(dev, offload); |
3844 | if (ret) |
3845 | goto cleanup; |
3846 | } |
3847 | } |
3848 | |
3849 | /* If h/w offloading is available, propagate to the device */ |
3850 | if (!macsec_offload_state_change && macsec_is_offloaded(macsec)) { |
3851 | const struct macsec_ops *ops; |
3852 | struct macsec_context ctx; |
3853 | |
3854 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
3855 | if (!ops) { |
3856 | ret = -EOPNOTSUPP; |
3857 | goto cleanup; |
3858 | } |
3859 | |
3860 | ctx.secy = &macsec->secy; |
3861 | ret = macsec_offload(func: ops->mdo_upd_secy, ctx: &ctx); |
3862 | if (ret) |
3863 | goto cleanup; |
3864 | } |
3865 | |
3866 | return 0; |
3867 | |
3868 | cleanup: |
3869 | memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc)); |
3870 | memcpy(&macsec->secy, &secy, sizeof(secy)); |
3871 | |
3872 | return ret; |
3873 | } |
3874 | |
3875 | static void macsec_del_dev(struct macsec_dev *macsec) |
3876 | { |
3877 | int i; |
3878 | |
3879 | while (macsec->secy.rx_sc) { |
3880 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); |
3881 | |
3882 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); |
3883 | free_rx_sc(rx_sc); |
3884 | } |
3885 | |
3886 | for (i = 0; i < MACSEC_NUM_AN; i++) { |
3887 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); |
3888 | |
3889 | if (sa) { |
3890 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); |
3891 | clear_tx_sa(tx_sa: sa); |
3892 | } |
3893 | } |
3894 | } |
3895 | |
3896 | static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
3897 | { |
3898 | struct macsec_dev *macsec = macsec_priv(dev); |
3899 | struct net_device *real_dev = macsec->real_dev; |
3900 | |
3901 | /* If h/w offloading is available, propagate to the device */ |
3902 | if (macsec_is_offloaded(macsec)) { |
3903 | const struct macsec_ops *ops; |
3904 | struct macsec_context ctx; |
3905 | |
3906 | ops = macsec_get_ops(macsec: netdev_priv(dev), ctx: &ctx); |
3907 | if (ops) { |
3908 | ctx.secy = &macsec->secy; |
3909 | macsec_offload(func: ops->mdo_del_secy, ctx: &ctx); |
3910 | } |
3911 | } |
3912 | |
3913 | unregister_netdevice_queue(dev, head); |
3914 | list_del_rcu(entry: &macsec->secys); |
3915 | macsec_del_dev(macsec); |
3916 | netdev_upper_dev_unlink(dev: real_dev, upper_dev: dev); |
3917 | |
3918 | macsec_generation++; |
3919 | } |
3920 | |
3921 | static void macsec_dellink(struct net_device *dev, struct list_head *head) |
3922 | { |
3923 | struct macsec_dev *macsec = macsec_priv(dev); |
3924 | struct net_device *real_dev = macsec->real_dev; |
3925 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev: real_dev); |
3926 | |
3927 | macsec_common_dellink(dev, head); |
3928 | |
3929 | if (list_empty(head: &rxd->secys)) { |
3930 | netdev_rx_handler_unregister(dev: real_dev); |
3931 | kfree(objp: rxd); |
3932 | } |
3933 | } |
3934 | |
3935 | static int register_macsec_dev(struct net_device *real_dev, |
3936 | struct net_device *dev) |
3937 | { |
3938 | struct macsec_dev *macsec = macsec_priv(dev); |
3939 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev: real_dev); |
3940 | |
3941 | if (!rxd) { |
3942 | int err; |
3943 | |
3944 | rxd = kmalloc(size: sizeof(*rxd), GFP_KERNEL); |
3945 | if (!rxd) |
3946 | return -ENOMEM; |
3947 | |
3948 | INIT_LIST_HEAD(list: &rxd->secys); |
3949 | |
3950 | err = netdev_rx_handler_register(dev: real_dev, rx_handler: macsec_handle_frame, |
3951 | rx_handler_data: rxd); |
3952 | if (err < 0) { |
3953 | kfree(objp: rxd); |
3954 | return err; |
3955 | } |
3956 | } |
3957 | |
3958 | list_add_tail_rcu(new: &macsec->secys, head: &rxd->secys); |
3959 | return 0; |
3960 | } |
3961 | |
3962 | static bool sci_exists(struct net_device *dev, sci_t sci) |
3963 | { |
3964 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); |
3965 | struct macsec_dev *macsec; |
3966 | |
3967 | list_for_each_entry(macsec, &rxd->secys, secys) { |
3968 | if (macsec->secy.sci == sci) |
3969 | return true; |
3970 | } |
3971 | |
3972 | return false; |
3973 | } |
3974 | |
3975 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) |
3976 | { |
3977 | return make_sci(addr: dev->dev_addr, port); |
3978 | } |
3979 | |
3980 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) |
3981 | { |
3982 | struct macsec_dev *macsec = macsec_priv(dev); |
3983 | struct macsec_secy *secy = &macsec->secy; |
3984 | |
3985 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); |
3986 | if (!macsec->stats) |
3987 | return -ENOMEM; |
3988 | |
3989 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); |
3990 | if (!secy->tx_sc.stats) |
3991 | return -ENOMEM; |
3992 | |
3993 | secy->tx_sc.md_dst = metadata_dst_alloc(optslen: 0, type: METADATA_MACSEC, GFP_KERNEL); |
3994 | if (!secy->tx_sc.md_dst) |
3995 | /* macsec and secy percpu stats will be freed when unregistering |
3996 | * net_device in macsec_free_netdev() |
3997 | */ |
3998 | return -ENOMEM; |
3999 | |
4000 | if (sci == MACSEC_UNDEF_SCI) |
4001 | sci = dev_to_sci(dev, MACSEC_PORT_ES); |
4002 | |
4003 | secy->netdev = dev; |
4004 | secy->operational = true; |
4005 | secy->key_len = DEFAULT_SAK_LEN; |
4006 | secy->icv_len = icv_len; |
4007 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; |
4008 | secy->protect_frames = true; |
4009 | secy->replay_protect = false; |
4010 | secy->xpn = DEFAULT_XPN; |
4011 | |
4012 | secy->sci = sci; |
4013 | secy->tx_sc.md_dst->u.macsec_info.sci = sci; |
4014 | secy->tx_sc.active = true; |
4015 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; |
4016 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; |
4017 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; |
4018 | secy->tx_sc.end_station = false; |
4019 | secy->tx_sc.scb = false; |
4020 | |
4021 | return 0; |
4022 | } |
4023 | |
4024 | static struct lock_class_key macsec_netdev_addr_lock_key; |
4025 | |
4026 | static int macsec_newlink(struct net *net, struct net_device *dev, |
4027 | struct nlattr *tb[], struct nlattr *data[], |
4028 | struct netlink_ext_ack *extack) |
4029 | { |
4030 | struct macsec_dev *macsec = macsec_priv(dev); |
4031 | rx_handler_func_t *rx_handler; |
4032 | u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
4033 | struct net_device *real_dev; |
4034 | int err, mtu; |
4035 | sci_t sci; |
4036 | |
4037 | if (!tb[IFLA_LINK]) |
4038 | return -EINVAL; |
4039 | real_dev = __dev_get_by_index(net, ifindex: nla_get_u32(nla: tb[IFLA_LINK])); |
4040 | if (!real_dev) |
4041 | return -ENODEV; |
4042 | if (real_dev->type != ARPHRD_ETHER) |
4043 | return -EINVAL; |
4044 | |
4045 | dev->priv_flags |= IFF_MACSEC; |
4046 | |
4047 | macsec->real_dev = real_dev; |
4048 | |
4049 | if (data && data[IFLA_MACSEC_OFFLOAD]) |
4050 | macsec->offload = nla_get_offload(nla: data[IFLA_MACSEC_OFFLOAD]); |
4051 | else |
4052 | /* MACsec offloading is off by default */ |
4053 | macsec->offload = MACSEC_OFFLOAD_OFF; |
4054 | |
4055 | /* Check if the offloading mode is supported by the underlying layers */ |
4056 | if (macsec->offload != MACSEC_OFFLOAD_OFF && |
4057 | !macsec_check_offload(offload: macsec->offload, macsec)) |
4058 | return -EOPNOTSUPP; |
4059 | |
4060 | /* send_sci must be set to true when transmit sci explicitly is set */ |
4061 | if ((data && data[IFLA_MACSEC_SCI]) && |
4062 | (data && data[IFLA_MACSEC_INC_SCI])) { |
4063 | u8 send_sci = !!nla_get_u8(nla: data[IFLA_MACSEC_INC_SCI]); |
4064 | |
4065 | if (!send_sci) |
4066 | return -EINVAL; |
4067 | } |
4068 | |
4069 | if (data && data[IFLA_MACSEC_ICV_LEN]) |
4070 | icv_len = nla_get_u8(nla: data[IFLA_MACSEC_ICV_LEN]); |
4071 | mtu = real_dev->mtu - icv_len - macsec_extra_len(sci_present: true); |
4072 | if (mtu < 0) |
4073 | dev->mtu = 0; |
4074 | else |
4075 | dev->mtu = mtu; |
4076 | |
4077 | rx_handler = rtnl_dereference(real_dev->rx_handler); |
4078 | if (rx_handler && rx_handler != macsec_handle_frame) |
4079 | return -EBUSY; |
4080 | |
4081 | err = register_netdevice(dev); |
4082 | if (err < 0) |
4083 | return err; |
4084 | |
4085 | netdev_lockdep_set_classes(dev); |
4086 | lockdep_set_class(&dev->addr_list_lock, |
4087 | &macsec_netdev_addr_lock_key); |
4088 | |
4089 | err = netdev_upper_dev_link(dev: real_dev, upper_dev: dev, extack); |
4090 | if (err < 0) |
4091 | goto unregister; |
4092 | |
4093 | /* need to be already registered so that ->init has run and |
4094 | * the MAC addr is set |
4095 | */ |
4096 | if (data && data[IFLA_MACSEC_SCI]) |
4097 | sci = nla_get_sci(nla: data[IFLA_MACSEC_SCI]); |
4098 | else if (data && data[IFLA_MACSEC_PORT]) |
4099 | sci = dev_to_sci(dev, port: nla_get_be16(nla: data[IFLA_MACSEC_PORT])); |
4100 | else |
4101 | sci = dev_to_sci(dev, MACSEC_PORT_ES); |
4102 | |
4103 | if (rx_handler && sci_exists(dev: real_dev, sci)) { |
4104 | err = -EBUSY; |
4105 | goto unlink; |
4106 | } |
4107 | |
4108 | err = macsec_add_dev(dev, sci, icv_len); |
4109 | if (err) |
4110 | goto unlink; |
4111 | |
4112 | if (data) { |
4113 | err = macsec_changelink_common(dev, data); |
4114 | if (err) |
4115 | goto del_dev; |
4116 | } |
4117 | |
4118 | /* If h/w offloading is available, propagate to the device */ |
4119 | if (macsec_is_offloaded(macsec)) { |
4120 | const struct macsec_ops *ops; |
4121 | struct macsec_context ctx; |
4122 | |
4123 | ops = macsec_get_ops(macsec, ctx: &ctx); |
4124 | if (ops) { |
4125 | ctx.secy = &macsec->secy; |
4126 | err = macsec_offload(func: ops->mdo_add_secy, ctx: &ctx); |
4127 | if (err) |
4128 | goto del_dev; |
4129 | } |
4130 | } |
4131 | |
4132 | err = register_macsec_dev(real_dev, dev); |
4133 | if (err < 0) |
4134 | goto del_dev; |
4135 | |
4136 | netif_stacked_transfer_operstate(rootdev: real_dev, dev); |
4137 | linkwatch_fire_event(dev); |
4138 | |
4139 | macsec_generation++; |
4140 | |
4141 | return 0; |
4142 | |
4143 | del_dev: |
4144 | macsec_del_dev(macsec); |
4145 | unlink: |
4146 | netdev_upper_dev_unlink(dev: real_dev, upper_dev: dev); |
4147 | unregister: |
4148 | unregister_netdevice(dev); |
4149 | return err; |
4150 | } |
4151 | |
4152 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[], |
4153 | struct netlink_ext_ack *extack) |
4154 | { |
4155 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
4156 | u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
4157 | int flag; |
4158 | bool es, scb, sci; |
4159 | |
4160 | if (!data) |
4161 | return 0; |
4162 | |
4163 | if (data[IFLA_MACSEC_CIPHER_SUITE]) |
4164 | csid = nla_get_u64(nla: data[IFLA_MACSEC_CIPHER_SUITE]); |
4165 | |
4166 | if (data[IFLA_MACSEC_ICV_LEN]) { |
4167 | icv_len = nla_get_u8(nla: data[IFLA_MACSEC_ICV_LEN]); |
4168 | if (icv_len != MACSEC_DEFAULT_ICV_LEN) { |
4169 | char dummy_key[DEFAULT_SAK_LEN] = { 0 }; |
4170 | struct crypto_aead *dummy_tfm; |
4171 | |
4172 | dummy_tfm = macsec_alloc_tfm(key: dummy_key, |
4173 | DEFAULT_SAK_LEN, |
4174 | icv_len); |
4175 | if (IS_ERR(ptr: dummy_tfm)) |
4176 | return PTR_ERR(ptr: dummy_tfm); |
4177 | crypto_free_aead(tfm: dummy_tfm); |
4178 | } |
4179 | } |
4180 | |
4181 | switch (csid) { |
4182 | case MACSEC_CIPHER_ID_GCM_AES_128: |
4183 | case MACSEC_CIPHER_ID_GCM_AES_256: |
4184 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: |
4185 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: |
4186 | case MACSEC_DEFAULT_CIPHER_ID: |
4187 | if (icv_len < MACSEC_MIN_ICV_LEN || |
4188 | icv_len > MACSEC_STD_ICV_LEN) |
4189 | return -EINVAL; |
4190 | break; |
4191 | default: |
4192 | return -EINVAL; |
4193 | } |
4194 | |
4195 | if (data[IFLA_MACSEC_ENCODING_SA]) { |
4196 | if (nla_get_u8(nla: data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) |
4197 | return -EINVAL; |
4198 | } |
4199 | |
4200 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; |
4201 | flag < IFLA_MACSEC_VALIDATION; |
4202 | flag++) { |
4203 | if (data[flag]) { |
4204 | if (nla_get_u8(nla: data[flag]) > 1) |
4205 | return -EINVAL; |
4206 | } |
4207 | } |
4208 | |
4209 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(nla: data[IFLA_MACSEC_ES]) : false; |
4210 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(nla: data[IFLA_MACSEC_INC_SCI]) : false; |
4211 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(nla: data[IFLA_MACSEC_SCB]) : false; |
4212 | |
4213 | if ((sci && (scb || es)) || (scb && es)) |
4214 | return -EINVAL; |
4215 | |
4216 | if (data[IFLA_MACSEC_VALIDATION] && |
4217 | nla_get_u8(nla: data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) |
4218 | return -EINVAL; |
4219 | |
4220 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
4221 | nla_get_u8(nla: data[IFLA_MACSEC_REPLAY_PROTECT])) && |
4222 | !data[IFLA_MACSEC_WINDOW]) |
4223 | return -EINVAL; |
4224 | |
4225 | return 0; |
4226 | } |
4227 | |
4228 | static struct net *macsec_get_link_net(const struct net_device *dev) |
4229 | { |
4230 | return dev_net(dev: macsec_priv(dev)->real_dev); |
4231 | } |
4232 | |
4233 | struct net_device *macsec_get_real_dev(const struct net_device *dev) |
4234 | { |
4235 | return macsec_priv(dev)->real_dev; |
4236 | } |
4237 | EXPORT_SYMBOL_GPL(macsec_get_real_dev); |
4238 | |
4239 | bool macsec_netdev_is_offloaded(struct net_device *dev) |
4240 | { |
4241 | return macsec_is_offloaded(macsec: macsec_priv(dev)); |
4242 | } |
4243 | EXPORT_SYMBOL_GPL(macsec_netdev_is_offloaded); |
4244 | |
4245 | static size_t macsec_get_size(const struct net_device *dev) |
4246 | { |
4247 | return nla_total_size_64bit(payload: 8) + /* IFLA_MACSEC_SCI */ |
4248 | nla_total_size(payload: 1) + /* IFLA_MACSEC_ICV_LEN */ |
4249 | nla_total_size_64bit(payload: 8) + /* IFLA_MACSEC_CIPHER_SUITE */ |
4250 | nla_total_size(payload: 4) + /* IFLA_MACSEC_WINDOW */ |
4251 | nla_total_size(payload: 1) + /* IFLA_MACSEC_ENCODING_SA */ |
4252 | nla_total_size(payload: 1) + /* IFLA_MACSEC_ENCRYPT */ |
4253 | nla_total_size(payload: 1) + /* IFLA_MACSEC_PROTECT */ |
4254 | nla_total_size(payload: 1) + /* IFLA_MACSEC_INC_SCI */ |
4255 | nla_total_size(payload: 1) + /* IFLA_MACSEC_ES */ |
4256 | nla_total_size(payload: 1) + /* IFLA_MACSEC_SCB */ |
4257 | nla_total_size(payload: 1) + /* IFLA_MACSEC_REPLAY_PROTECT */ |
4258 | nla_total_size(payload: 1) + /* IFLA_MACSEC_VALIDATION */ |
4259 | nla_total_size(payload: 1) + /* IFLA_MACSEC_OFFLOAD */ |
4260 | 0; |
4261 | } |
4262 | |
4263 | static int macsec_fill_info(struct sk_buff *skb, |
4264 | const struct net_device *dev) |
4265 | { |
4266 | struct macsec_tx_sc *tx_sc; |
4267 | struct macsec_dev *macsec; |
4268 | struct macsec_secy *secy; |
4269 | u64 csid; |
4270 | |
4271 | macsec = macsec_priv(dev); |
4272 | secy = &macsec->secy; |
4273 | tx_sc = &secy->tx_sc; |
4274 | |
4275 | switch (secy->key_len) { |
4276 | case MACSEC_GCM_AES_128_SAK_LEN: |
4277 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
4278 | break; |
4279 | case MACSEC_GCM_AES_256_SAK_LEN: |
4280 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
4281 | break; |
4282 | default: |
4283 | goto nla_put_failure; |
4284 | } |
4285 | |
4286 | if (nla_put_sci(skb, attrtype: IFLA_MACSEC_SCI, value: secy->sci, |
4287 | padattr: IFLA_MACSEC_PAD) || |
4288 | nla_put_u8(skb, attrtype: IFLA_MACSEC_ICV_LEN, value: secy->icv_len) || |
4289 | nla_put_u64_64bit(skb, attrtype: IFLA_MACSEC_CIPHER_SUITE, |
4290 | value: csid, padattr: IFLA_MACSEC_PAD) || |
4291 | nla_put_u8(skb, attrtype: IFLA_MACSEC_ENCODING_SA, value: tx_sc->encoding_sa) || |
4292 | nla_put_u8(skb, attrtype: IFLA_MACSEC_ENCRYPT, value: tx_sc->encrypt) || |
4293 | nla_put_u8(skb, attrtype: IFLA_MACSEC_PROTECT, value: secy->protect_frames) || |
4294 | nla_put_u8(skb, attrtype: IFLA_MACSEC_INC_SCI, value: tx_sc->send_sci) || |
4295 | nla_put_u8(skb, attrtype: IFLA_MACSEC_ES, value: tx_sc->end_station) || |
4296 | nla_put_u8(skb, attrtype: IFLA_MACSEC_SCB, value: tx_sc->scb) || |
4297 | nla_put_u8(skb, attrtype: IFLA_MACSEC_REPLAY_PROTECT, value: secy->replay_protect) || |
4298 | nla_put_u8(skb, attrtype: IFLA_MACSEC_VALIDATION, value: secy->validate_frames) || |
4299 | nla_put_u8(skb, attrtype: IFLA_MACSEC_OFFLOAD, value: macsec->offload) || |
4300 | 0) |
4301 | goto nla_put_failure; |
4302 | |
4303 | if (secy->replay_protect) { |
4304 | if (nla_put_u32(skb, attrtype: IFLA_MACSEC_WINDOW, value: secy->replay_window)) |
4305 | goto nla_put_failure; |
4306 | } |
4307 | |
4308 | return 0; |
4309 | |
4310 | nla_put_failure: |
4311 | return -EMSGSIZE; |
4312 | } |
4313 | |
4314 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { |
4315 | .kind = "macsec" , |
4316 | .priv_size = sizeof(struct macsec_dev), |
4317 | .maxtype = IFLA_MACSEC_MAX, |
4318 | .policy = macsec_rtnl_policy, |
4319 | .setup = macsec_setup, |
4320 | .validate = macsec_validate_attr, |
4321 | .newlink = macsec_newlink, |
4322 | .changelink = macsec_changelink, |
4323 | .dellink = macsec_dellink, |
4324 | .get_size = macsec_get_size, |
4325 | .fill_info = macsec_fill_info, |
4326 | .get_link_net = macsec_get_link_net, |
4327 | }; |
4328 | |
4329 | static bool is_macsec_master(struct net_device *dev) |
4330 | { |
4331 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; |
4332 | } |
4333 | |
4334 | static int macsec_notify(struct notifier_block *this, unsigned long event, |
4335 | void *ptr) |
4336 | { |
4337 | struct net_device *real_dev = netdev_notifier_info_to_dev(info: ptr); |
4338 | LIST_HEAD(head); |
4339 | |
4340 | if (!is_macsec_master(dev: real_dev)) |
4341 | return NOTIFY_DONE; |
4342 | |
4343 | switch (event) { |
4344 | case NETDEV_DOWN: |
4345 | case NETDEV_UP: |
4346 | case NETDEV_CHANGE: { |
4347 | struct macsec_dev *m, *n; |
4348 | struct macsec_rxh_data *rxd; |
4349 | |
4350 | rxd = macsec_data_rtnl(dev: real_dev); |
4351 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { |
4352 | struct net_device *dev = m->secy.netdev; |
4353 | |
4354 | netif_stacked_transfer_operstate(rootdev: real_dev, dev); |
4355 | } |
4356 | break; |
4357 | } |
4358 | case NETDEV_UNREGISTER: { |
4359 | struct macsec_dev *m, *n; |
4360 | struct macsec_rxh_data *rxd; |
4361 | |
4362 | rxd = macsec_data_rtnl(dev: real_dev); |
4363 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { |
4364 | macsec_common_dellink(dev: m->secy.netdev, head: &head); |
4365 | } |
4366 | |
4367 | netdev_rx_handler_unregister(dev: real_dev); |
4368 | kfree(objp: rxd); |
4369 | |
4370 | unregister_netdevice_many(head: &head); |
4371 | break; |
4372 | } |
4373 | case NETDEV_CHANGEMTU: { |
4374 | struct macsec_dev *m; |
4375 | struct macsec_rxh_data *rxd; |
4376 | |
4377 | rxd = macsec_data_rtnl(dev: real_dev); |
4378 | list_for_each_entry(m, &rxd->secys, secys) { |
4379 | struct net_device *dev = m->secy.netdev; |
4380 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + |
4381 | macsec_extra_len(sci_present: true)); |
4382 | |
4383 | if (dev->mtu > mtu) |
4384 | dev_set_mtu(dev, mtu); |
4385 | } |
4386 | } |
4387 | } |
4388 | |
4389 | return NOTIFY_OK; |
4390 | } |
4391 | |
4392 | static struct notifier_block macsec_notifier = { |
4393 | .notifier_call = macsec_notify, |
4394 | }; |
4395 | |
4396 | static int __init macsec_init(void) |
4397 | { |
4398 | int err; |
4399 | |
4400 | pr_info("MACsec IEEE 802.1AE\n" ); |
4401 | err = register_netdevice_notifier(nb: &macsec_notifier); |
4402 | if (err) |
4403 | return err; |
4404 | |
4405 | err = rtnl_link_register(ops: &macsec_link_ops); |
4406 | if (err) |
4407 | goto notifier; |
4408 | |
4409 | err = genl_register_family(family: &macsec_fam); |
4410 | if (err) |
4411 | goto rtnl; |
4412 | |
4413 | return 0; |
4414 | |
4415 | rtnl: |
4416 | rtnl_link_unregister(ops: &macsec_link_ops); |
4417 | notifier: |
4418 | unregister_netdevice_notifier(nb: &macsec_notifier); |
4419 | return err; |
4420 | } |
4421 | |
4422 | static void __exit macsec_exit(void) |
4423 | { |
4424 | genl_unregister_family(family: &macsec_fam); |
4425 | rtnl_link_unregister(ops: &macsec_link_ops); |
4426 | unregister_netdevice_notifier(nb: &macsec_notifier); |
4427 | rcu_barrier(); |
4428 | } |
4429 | |
4430 | module_init(macsec_init); |
4431 | module_exit(macsec_exit); |
4432 | |
4433 | MODULE_ALIAS_RTNL_LINK("macsec" ); |
4434 | MODULE_ALIAS_GENL_FAMILY("macsec" ); |
4435 | |
4436 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE" ); |
4437 | MODULE_LICENSE("GPL v2" ); |
4438 | |