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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c09440f7 SD |
2 | /* |
3 | * drivers/net/macsec.c - MACsec device | |
4 | * | |
5 | * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net> | |
c09440f7 SD |
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> | |
3cf3227a | 14 | #include <linux/netdevice.h> |
c09440f7 | 15 | #include <linux/rtnetlink.h> |
e187246f | 16 | #include <linux/refcount.h> |
c09440f7 SD |
17 | #include <net/genetlink.h> |
18 | #include <net/sock.h> | |
5491e7c6 | 19 | #include <net/gro_cells.h> |
c0e4eadf | 20 | #include <net/macsec.h> |
3cf3227a | 21 | #include <linux/phy.h> |
c09440f7 SD |
22 | |
23 | #include <uapi/linux/if_macsec.h> | |
24 | ||
c09440f7 SD |
25 | #define MACSEC_SCI_LEN 8 |
26 | ||
27 | /* SecTAG length = macsec_eth_header without the optional SCI */ | |
28 | #define MACSEC_TAG_LEN 6 | |
29 | ||
30 | struct macsec_eth_header { | |
31 | struct ethhdr eth; | |
32 | /* SecTAG */ | |
33 | u8 tci_an; | |
34 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
35 | u8 short_length:6, | |
36 | unused:2; | |
37 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
38 | u8 unused:2, | |
39 | short_length:6; | |
40 | #else | |
41 | #error "Please fix <asm/byteorder.h>" | |
42 | #endif | |
43 | __be32 packet_number; | |
44 | u8 secure_channel_id[8]; /* optional */ | |
45 | } __packed; | |
46 | ||
47 | #define MACSEC_TCI_VERSION 0x80 | |
48 | #define MACSEC_TCI_ES 0x40 /* end station */ | |
49 | #define MACSEC_TCI_SC 0x20 /* SCI present */ | |
50 | #define MACSEC_TCI_SCB 0x10 /* epon */ | |
51 | #define MACSEC_TCI_E 0x08 /* encryption */ | |
52 | #define MACSEC_TCI_C 0x04 /* changed text */ | |
53 | #define MACSEC_AN_MASK 0x03 /* association number */ | |
54 | #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C) | |
55 | ||
56 | /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */ | |
57 | #define MIN_NON_SHORT_LEN 48 | |
58 | ||
59 | #define GCM_AES_IV_LEN 12 | |
60 | #define DEFAULT_ICV_LEN 16 | |
61 | ||
7979472b | 62 | #define for_each_rxsc(secy, sc) \ |
c09440f7 | 63 | for (sc = rcu_dereference_bh(secy->rx_sc); \ |
7979472b | 64 | sc; \ |
c09440f7 SD |
65 | sc = rcu_dereference_bh(sc->next)) |
66 | #define for_each_rxsc_rtnl(secy, sc) \ | |
67 | for (sc = rtnl_dereference(secy->rx_sc); \ | |
68 | sc; \ | |
69 | sc = rtnl_dereference(sc->next)) | |
70 | ||
71 | struct gcm_iv { | |
72 | union { | |
73 | u8 secure_channel_id[8]; | |
74 | sci_t sci; | |
75 | }; | |
76 | __be32 pn; | |
77 | }; | |
78 | ||
c09440f7 SD |
79 | struct macsec_dev_stats { |
80 | __u64 OutPktsUntagged; | |
81 | __u64 InPktsUntagged; | |
82 | __u64 OutPktsTooLong; | |
83 | __u64 InPktsNoTag; | |
84 | __u64 InPktsBadTag; | |
85 | __u64 InPktsUnknownSCI; | |
86 | __u64 InPktsNoSCI; | |
87 | __u64 InPktsOverrun; | |
88 | }; | |
89 | ||
c09440f7 SD |
90 | #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT |
91 | ||
c09440f7 SD |
92 | struct pcpu_secy_stats { |
93 | struct macsec_dev_stats stats; | |
94 | struct u64_stats_sync syncp; | |
95 | }; | |
96 | ||
97 | /** | |
98 | * struct macsec_dev - private data | |
99 | * @secy: SecY config | |
100 | * @real_dev: pointer to underlying netdevice | |
101 | * @stats: MACsec device stats | |
102 | * @secys: linked list of SecY's on the underlying device | |
3cf3227a | 103 | * @offload: status of offloading on the MACsec device |
c09440f7 SD |
104 | */ |
105 | struct macsec_dev { | |
106 | struct macsec_secy secy; | |
107 | struct net_device *real_dev; | |
108 | struct pcpu_secy_stats __percpu *stats; | |
109 | struct list_head secys; | |
5491e7c6 | 110 | struct gro_cells gro_cells; |
3cf3227a | 111 | enum macsec_offload offload; |
c09440f7 SD |
112 | }; |
113 | ||
114 | /** | |
115 | * struct macsec_rxh_data - rx_handler private argument | |
116 | * @secys: linked list of SecY's on this underlying device | |
117 | */ | |
118 | struct macsec_rxh_data { | |
119 | struct list_head secys; | |
120 | }; | |
121 | ||
122 | static struct macsec_dev *macsec_priv(const struct net_device *dev) | |
123 | { | |
124 | return (struct macsec_dev *)netdev_priv(dev); | |
125 | } | |
126 | ||
127 | static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) | |
128 | { | |
129 | return rcu_dereference_bh(dev->rx_handler_data); | |
130 | } | |
131 | ||
132 | static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) | |
133 | { | |
134 | return rtnl_dereference(dev->rx_handler_data); | |
135 | } | |
136 | ||
137 | struct macsec_cb { | |
138 | struct aead_request *req; | |
139 | union { | |
140 | struct macsec_tx_sa *tx_sa; | |
141 | struct macsec_rx_sa *rx_sa; | |
142 | }; | |
143 | u8 assoc_num; | |
144 | bool valid; | |
145 | bool has_sci; | |
146 | }; | |
147 | ||
148 | static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) | |
149 | { | |
150 | struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); | |
151 | ||
152 | if (!sa || !sa->active) | |
153 | return NULL; | |
154 | ||
e187246f | 155 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
156 | return NULL; |
157 | ||
158 | return sa; | |
159 | } | |
160 | ||
161 | static void free_rx_sc_rcu(struct rcu_head *head) | |
162 | { | |
163 | struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); | |
164 | ||
165 | free_percpu(rx_sc->stats); | |
166 | kfree(rx_sc); | |
167 | } | |
168 | ||
169 | static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) | |
170 | { | |
8676d76f | 171 | return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL; |
c09440f7 SD |
172 | } |
173 | ||
174 | static void macsec_rxsc_put(struct macsec_rx_sc *sc) | |
175 | { | |
8676d76f | 176 | if (refcount_dec_and_test(&sc->refcnt)) |
c09440f7 SD |
177 | call_rcu(&sc->rcu_head, free_rx_sc_rcu); |
178 | } | |
179 | ||
180 | static void free_rxsa(struct rcu_head *head) | |
181 | { | |
182 | struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); | |
183 | ||
184 | crypto_free_aead(sa->key.tfm); | |
185 | free_percpu(sa->stats); | |
c09440f7 SD |
186 | kfree(sa); |
187 | } | |
188 | ||
189 | static void macsec_rxsa_put(struct macsec_rx_sa *sa) | |
190 | { | |
e187246f | 191 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
192 | call_rcu(&sa->rcu, free_rxsa); |
193 | } | |
194 | ||
195 | static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) | |
196 | { | |
197 | struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); | |
198 | ||
199 | if (!sa || !sa->active) | |
200 | return NULL; | |
201 | ||
28206cdb | 202 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
203 | return NULL; |
204 | ||
205 | return sa; | |
206 | } | |
207 | ||
208 | static void free_txsa(struct rcu_head *head) | |
209 | { | |
210 | struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); | |
211 | ||
212 | crypto_free_aead(sa->key.tfm); | |
213 | free_percpu(sa->stats); | |
214 | kfree(sa); | |
215 | } | |
216 | ||
217 | static void macsec_txsa_put(struct macsec_tx_sa *sa) | |
218 | { | |
28206cdb | 219 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
220 | call_rcu(&sa->rcu, free_txsa); |
221 | } | |
222 | ||
223 | static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) | |
224 | { | |
225 | BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); | |
226 | return (struct macsec_cb *)skb->cb; | |
227 | } | |
228 | ||
229 | #define MACSEC_PORT_ES (htons(0x0001)) | |
230 | #define MACSEC_PORT_SCB (0x0000) | |
231 | #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) | |
232 | ||
ccfdec90 FW |
233 | #define MACSEC_GCM_AES_128_SAK_LEN 16 |
234 | #define MACSEC_GCM_AES_256_SAK_LEN 32 | |
235 | ||
ccfdec90 | 236 | #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN |
c09440f7 SD |
237 | #define DEFAULT_SEND_SCI true |
238 | #define DEFAULT_ENCRYPT false | |
239 | #define DEFAULT_ENCODING_SA 0 | |
240 | ||
e0f841f5 TB |
241 | static bool send_sci(const struct macsec_secy *secy) |
242 | { | |
243 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
244 | ||
245 | return tx_sc->send_sci || | |
246 | (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb); | |
247 | } | |
248 | ||
c09440f7 SD |
249 | static sci_t make_sci(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(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 macsec_extra_len(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, | |
e0f841f5 TB |
289 | const struct macsec_secy *secy, u32 pn, |
290 | bool sci_present) | |
c09440f7 SD |
291 | { |
292 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
293 | ||
e0f841f5 | 294 | memset(&h->tci_an, 0, macsec_sectag_len(sci_present)); |
c09440f7 SD |
295 | h->eth.h_proto = htons(ETH_P_MACSEC); |
296 | ||
e0f841f5 | 297 | if (sci_present) { |
c09440f7 SD |
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 != 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 | ||
3cf3227a AT |
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_PHY) | |
329 | return true; | |
330 | ||
331 | return false; | |
332 | } | |
333 | ||
334 | /* Checks if underlying layers implement MACsec offloading functions. */ | |
335 | static bool macsec_check_offload(enum macsec_offload offload, | |
336 | struct macsec_dev *macsec) | |
337 | { | |
338 | if (!macsec || !macsec->real_dev) | |
339 | return false; | |
340 | ||
341 | if (offload == MACSEC_OFFLOAD_PHY) | |
342 | return macsec->real_dev->phydev && | |
343 | macsec->real_dev->phydev->macsec_ops; | |
344 | ||
345 | return false; | |
346 | } | |
347 | ||
348 | static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload, | |
349 | struct macsec_dev *macsec, | |
350 | struct macsec_context *ctx) | |
351 | { | |
352 | if (ctx) { | |
353 | memset(ctx, 0, sizeof(*ctx)); | |
354 | ctx->offload = offload; | |
355 | ||
356 | if (offload == MACSEC_OFFLOAD_PHY) | |
357 | ctx->phydev = macsec->real_dev->phydev; | |
358 | } | |
359 | ||
360 | return macsec->real_dev->phydev->macsec_ops; | |
361 | } | |
362 | ||
363 | /* Returns a pointer to the MACsec ops struct if any and updates the MACsec | |
364 | * context device reference if provided. | |
365 | */ | |
366 | static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec, | |
367 | struct macsec_context *ctx) | |
368 | { | |
369 | if (!macsec_check_offload(macsec->offload, macsec)) | |
370 | return NULL; | |
371 | ||
372 | return __macsec_get_ops(macsec->offload, macsec, ctx); | |
373 | } | |
374 | ||
c09440f7 SD |
375 | /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */ |
376 | static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len) | |
377 | { | |
378 | struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data; | |
379 | int len = skb->len - 2 * ETH_ALEN; | |
380 | int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len; | |
381 | ||
382 | /* a) It comprises at least 17 octets */ | |
383 | if (skb->len <= 16) | |
384 | return false; | |
385 | ||
386 | /* b) MACsec EtherType: already checked */ | |
387 | ||
388 | /* c) V bit is clear */ | |
389 | if (h->tci_an & MACSEC_TCI_VERSION) | |
390 | return false; | |
391 | ||
392 | /* d) ES or SCB => !SC */ | |
393 | if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) && | |
394 | (h->tci_an & MACSEC_TCI_SC)) | |
395 | return false; | |
396 | ||
397 | /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */ | |
398 | if (h->unused) | |
399 | return false; | |
400 | ||
401 | /* rx.pn != 0 (figure 10-5) */ | |
402 | if (!h->packet_number) | |
403 | return false; | |
404 | ||
405 | /* length check, f) g) h) i) */ | |
406 | if (h->short_length) | |
407 | return len == extra_len + h->short_length; | |
408 | return len >= extra_len + MIN_NON_SHORT_LEN; | |
409 | } | |
410 | ||
411 | #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true)) | |
2ccbe2cb | 412 | #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN |
c09440f7 SD |
413 | |
414 | static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn) | |
415 | { | |
416 | struct gcm_iv *gcm_iv = (struct gcm_iv *)iv; | |
417 | ||
418 | gcm_iv->sci = sci; | |
419 | gcm_iv->pn = htonl(pn); | |
420 | } | |
421 | ||
422 | static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) | |
423 | { | |
424 | return (struct macsec_eth_header *)skb_mac_header(skb); | |
425 | } | |
426 | ||
6fc498bc DB |
427 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) |
428 | { | |
429 | return make_sci(dev->dev_addr, port); | |
430 | } | |
431 | ||
5c937de7 AT |
432 | static void __macsec_pn_wrapped(struct macsec_secy *secy, |
433 | struct macsec_tx_sa *tx_sa) | |
434 | { | |
435 | pr_debug("PN wrapped, transitioning to !oper\n"); | |
436 | tx_sa->active = false; | |
437 | if (secy->protect_frames) | |
438 | secy->operational = false; | |
439 | } | |
440 | ||
441 | void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa) | |
442 | { | |
443 | spin_lock_bh(&tx_sa->lock); | |
444 | __macsec_pn_wrapped(secy, tx_sa); | |
445 | spin_unlock_bh(&tx_sa->lock); | |
446 | } | |
447 | EXPORT_SYMBOL_GPL(macsec_pn_wrapped); | |
448 | ||
c09440f7 SD |
449 | static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy) |
450 | { | |
451 | u32 pn; | |
452 | ||
453 | spin_lock_bh(&tx_sa->lock); | |
454 | pn = tx_sa->next_pn; | |
455 | ||
456 | tx_sa->next_pn++; | |
5c937de7 AT |
457 | if (tx_sa->next_pn == 0) |
458 | __macsec_pn_wrapped(secy, tx_sa); | |
c09440f7 SD |
459 | spin_unlock_bh(&tx_sa->lock); |
460 | ||
461 | return pn; | |
462 | } | |
463 | ||
464 | static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) | |
465 | { | |
466 | struct macsec_dev *macsec = netdev_priv(dev); | |
467 | ||
468 | skb->dev = macsec->real_dev; | |
469 | skb_reset_mac_header(skb); | |
470 | skb->protocol = eth_hdr(skb)->h_proto; | |
471 | } | |
472 | ||
473 | static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, | |
474 | struct macsec_tx_sa *tx_sa) | |
475 | { | |
476 | struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); | |
477 | ||
478 | u64_stats_update_begin(&txsc_stats->syncp); | |
479 | if (tx_sc->encrypt) { | |
480 | txsc_stats->stats.OutOctetsEncrypted += skb->len; | |
481 | txsc_stats->stats.OutPktsEncrypted++; | |
482 | this_cpu_inc(tx_sa->stats->OutPktsEncrypted); | |
483 | } else { | |
484 | txsc_stats->stats.OutOctetsProtected += skb->len; | |
485 | txsc_stats->stats.OutPktsProtected++; | |
486 | this_cpu_inc(tx_sa->stats->OutPktsProtected); | |
487 | } | |
488 | u64_stats_update_end(&txsc_stats->syncp); | |
489 | } | |
490 | ||
491 | static void count_tx(struct net_device *dev, int ret, int len) | |
492 | { | |
493 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
494 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
495 | ||
496 | u64_stats_update_begin(&stats->syncp); | |
497 | stats->tx_packets++; | |
498 | stats->tx_bytes += len; | |
499 | u64_stats_update_end(&stats->syncp); | |
c09440f7 SD |
500 | } |
501 | } | |
502 | ||
503 | static void macsec_encrypt_done(struct crypto_async_request *base, int err) | |
504 | { | |
505 | struct sk_buff *skb = base->data; | |
506 | struct net_device *dev = skb->dev; | |
507 | struct macsec_dev *macsec = macsec_priv(dev); | |
508 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; | |
509 | int len, ret; | |
510 | ||
511 | aead_request_free(macsec_skb_cb(skb)->req); | |
512 | ||
513 | rcu_read_lock_bh(); | |
514 | macsec_encrypt_finish(skb, dev); | |
515 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
516 | len = skb->len; | |
517 | ret = dev_queue_xmit(skb); | |
518 | count_tx(dev, ret, len); | |
519 | rcu_read_unlock_bh(); | |
520 | ||
521 | macsec_txsa_put(sa); | |
522 | dev_put(dev); | |
523 | } | |
524 | ||
5d9649b3 SD |
525 | static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
526 | unsigned char **iv, | |
5294b830 JD |
527 | struct scatterlist **sg, |
528 | int num_frags) | |
5d9649b3 SD |
529 | { |
530 | size_t size, iv_offset, sg_offset; | |
531 | struct aead_request *req; | |
532 | void *tmp; | |
533 | ||
534 | size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); | |
535 | iv_offset = size; | |
536 | size += GCM_AES_IV_LEN; | |
537 | ||
538 | size = ALIGN(size, __alignof__(struct scatterlist)); | |
539 | sg_offset = size; | |
5294b830 | 540 | size += sizeof(struct scatterlist) * num_frags; |
5d9649b3 SD |
541 | |
542 | tmp = kmalloc(size, GFP_ATOMIC); | |
543 | if (!tmp) | |
544 | return NULL; | |
545 | ||
546 | *iv = (unsigned char *)(tmp + iv_offset); | |
547 | *sg = (struct scatterlist *)(tmp + sg_offset); | |
548 | req = tmp; | |
549 | ||
550 | aead_request_set_tfm(req, tfm); | |
551 | ||
552 | return req; | |
553 | } | |
554 | ||
c09440f7 SD |
555 | static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
556 | struct net_device *dev) | |
557 | { | |
558 | int ret; | |
5d9649b3 | 559 | struct scatterlist *sg; |
5294b830 | 560 | struct sk_buff *trailer; |
5d9649b3 | 561 | unsigned char *iv; |
c09440f7 SD |
562 | struct ethhdr *eth; |
563 | struct macsec_eth_header *hh; | |
564 | size_t unprotected_len; | |
565 | struct aead_request *req; | |
566 | struct macsec_secy *secy; | |
567 | struct macsec_tx_sc *tx_sc; | |
568 | struct macsec_tx_sa *tx_sa; | |
569 | struct macsec_dev *macsec = macsec_priv(dev); | |
e0f841f5 | 570 | bool sci_present; |
c09440f7 SD |
571 | u32 pn; |
572 | ||
573 | secy = &macsec->secy; | |
574 | tx_sc = &secy->tx_sc; | |
575 | ||
576 | /* 10.5.1 TX SA assignment */ | |
577 | tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]); | |
578 | if (!tx_sa) { | |
579 | secy->operational = false; | |
580 | kfree_skb(skb); | |
581 | return ERR_PTR(-EINVAL); | |
582 | } | |
583 | ||
584 | if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || | |
585 | skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { | |
586 | struct sk_buff *nskb = skb_copy_expand(skb, | |
587 | MACSEC_NEEDED_HEADROOM, | |
588 | MACSEC_NEEDED_TAILROOM, | |
589 | GFP_ATOMIC); | |
590 | if (likely(nskb)) { | |
591 | consume_skb(skb); | |
592 | skb = nskb; | |
593 | } else { | |
594 | macsec_txsa_put(tx_sa); | |
595 | kfree_skb(skb); | |
596 | return ERR_PTR(-ENOMEM); | |
597 | } | |
598 | } else { | |
599 | skb = skb_unshare(skb, GFP_ATOMIC); | |
600 | if (!skb) { | |
601 | macsec_txsa_put(tx_sa); | |
602 | return ERR_PTR(-ENOMEM); | |
603 | } | |
604 | } | |
605 | ||
606 | unprotected_len = skb->len; | |
607 | eth = eth_hdr(skb); | |
e0f841f5 | 608 | sci_present = send_sci(secy); |
d58ff351 | 609 | hh = skb_push(skb, macsec_extra_len(sci_present)); |
c09440f7 SD |
610 | memmove(hh, eth, 2 * ETH_ALEN); |
611 | ||
612 | pn = tx_sa_update_pn(tx_sa, secy); | |
613 | if (pn == 0) { | |
614 | macsec_txsa_put(tx_sa); | |
615 | kfree_skb(skb); | |
616 | return ERR_PTR(-ENOLINK); | |
617 | } | |
e0f841f5 | 618 | macsec_fill_sectag(hh, secy, pn, sci_present); |
c09440f7 SD |
619 | macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN); |
620 | ||
c09440f7 SD |
621 | skb_put(skb, secy->icv_len); |
622 | ||
623 | if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { | |
624 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
625 | ||
626 | u64_stats_update_begin(&secy_stats->syncp); | |
627 | secy_stats->stats.OutPktsTooLong++; | |
628 | u64_stats_update_end(&secy_stats->syncp); | |
629 | ||
630 | macsec_txsa_put(tx_sa); | |
631 | kfree_skb(skb); | |
632 | return ERR_PTR(-EINVAL); | |
633 | } | |
634 | ||
5294b830 JD |
635 | ret = skb_cow_data(skb, 0, &trailer); |
636 | if (unlikely(ret < 0)) { | |
637 | macsec_txsa_put(tx_sa); | |
638 | kfree_skb(skb); | |
639 | return ERR_PTR(ret); | |
640 | } | |
641 | ||
642 | req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
643 | if (!req) { |
644 | macsec_txsa_put(tx_sa); | |
645 | kfree_skb(skb); | |
646 | return ERR_PTR(-ENOMEM); | |
647 | } | |
648 | ||
5d9649b3 SD |
649 | macsec_fill_iv(iv, secy->sci, pn); |
650 | ||
5294b830 | 651 | sg_init_table(sg, ret); |
cda7ea69 JD |
652 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
653 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 654 | aead_request_free(req); |
cda7ea69 JD |
655 | macsec_txsa_put(tx_sa); |
656 | kfree_skb(skb); | |
657 | return ERR_PTR(ret); | |
658 | } | |
c09440f7 SD |
659 | |
660 | if (tx_sc->encrypt) { | |
e0f841f5 | 661 | int len = skb->len - macsec_hdr_len(sci_present) - |
c09440f7 SD |
662 | secy->icv_len; |
663 | aead_request_set_crypt(req, sg, sg, len, iv); | |
e0f841f5 | 664 | aead_request_set_ad(req, macsec_hdr_len(sci_present)); |
c09440f7 SD |
665 | } else { |
666 | aead_request_set_crypt(req, sg, sg, 0, iv); | |
667 | aead_request_set_ad(req, skb->len - secy->icv_len); | |
668 | } | |
669 | ||
670 | macsec_skb_cb(skb)->req = req; | |
671 | macsec_skb_cb(skb)->tx_sa = tx_sa; | |
672 | aead_request_set_callback(req, 0, macsec_encrypt_done, skb); | |
673 | ||
674 | dev_hold(skb->dev); | |
675 | ret = crypto_aead_encrypt(req); | |
676 | if (ret == -EINPROGRESS) { | |
677 | return ERR_PTR(ret); | |
678 | } else if (ret != 0) { | |
679 | dev_put(skb->dev); | |
680 | kfree_skb(skb); | |
681 | aead_request_free(req); | |
682 | macsec_txsa_put(tx_sa); | |
683 | return ERR_PTR(-EINVAL); | |
684 | } | |
685 | ||
686 | dev_put(skb->dev); | |
687 | aead_request_free(req); | |
688 | macsec_txsa_put(tx_sa); | |
689 | ||
690 | return skb; | |
691 | } | |
692 | ||
693 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) | |
694 | { | |
695 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
696 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); | |
697 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); | |
698 | u32 lowest_pn = 0; | |
699 | ||
700 | spin_lock(&rx_sa->lock); | |
701 | if (rx_sa->next_pn >= secy->replay_window) | |
702 | lowest_pn = rx_sa->next_pn - secy->replay_window; | |
703 | ||
704 | /* Now perform replay protection check again | |
705 | * (see IEEE 802.1AE-2006 figure 10-5) | |
706 | */ | |
707 | if (secy->replay_protect && pn < lowest_pn) { | |
708 | spin_unlock(&rx_sa->lock); | |
709 | u64_stats_update_begin(&rxsc_stats->syncp); | |
710 | rxsc_stats->stats.InPktsLate++; | |
711 | u64_stats_update_end(&rxsc_stats->syncp); | |
712 | return false; | |
713 | } | |
714 | ||
715 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { | |
716 | u64_stats_update_begin(&rxsc_stats->syncp); | |
717 | if (hdr->tci_an & MACSEC_TCI_E) | |
718 | rxsc_stats->stats.InOctetsDecrypted += skb->len; | |
719 | else | |
720 | rxsc_stats->stats.InOctetsValidated += skb->len; | |
721 | u64_stats_update_end(&rxsc_stats->syncp); | |
722 | } | |
723 | ||
724 | if (!macsec_skb_cb(skb)->valid) { | |
725 | spin_unlock(&rx_sa->lock); | |
726 | ||
727 | /* 10.6.5 */ | |
728 | if (hdr->tci_an & MACSEC_TCI_C || | |
729 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
730 | u64_stats_update_begin(&rxsc_stats->syncp); | |
731 | rxsc_stats->stats.InPktsNotValid++; | |
732 | u64_stats_update_end(&rxsc_stats->syncp); | |
733 | return false; | |
734 | } | |
735 | ||
736 | u64_stats_update_begin(&rxsc_stats->syncp); | |
737 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { | |
738 | rxsc_stats->stats.InPktsInvalid++; | |
739 | this_cpu_inc(rx_sa->stats->InPktsInvalid); | |
740 | } else if (pn < lowest_pn) { | |
741 | rxsc_stats->stats.InPktsDelayed++; | |
742 | } else { | |
743 | rxsc_stats->stats.InPktsUnchecked++; | |
744 | } | |
745 | u64_stats_update_end(&rxsc_stats->syncp); | |
746 | } else { | |
747 | u64_stats_update_begin(&rxsc_stats->syncp); | |
748 | if (pn < lowest_pn) { | |
749 | rxsc_stats->stats.InPktsDelayed++; | |
750 | } else { | |
751 | rxsc_stats->stats.InPktsOK++; | |
752 | this_cpu_inc(rx_sa->stats->InPktsOK); | |
753 | } | |
754 | u64_stats_update_end(&rxsc_stats->syncp); | |
755 | ||
756 | if (pn >= rx_sa->next_pn) | |
757 | rx_sa->next_pn = pn + 1; | |
758 | spin_unlock(&rx_sa->lock); | |
759 | } | |
760 | ||
761 | return true; | |
762 | } | |
763 | ||
764 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) | |
765 | { | |
766 | skb->pkt_type = PACKET_HOST; | |
767 | skb->protocol = eth_type_trans(skb, dev); | |
768 | ||
769 | skb_reset_network_header(skb); | |
770 | if (!skb_transport_header_was_set(skb)) | |
771 | skb_reset_transport_header(skb); | |
772 | skb_reset_mac_len(skb); | |
773 | } | |
774 | ||
775 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) | |
776 | { | |
7d8b16b9 | 777 | skb->ip_summed = CHECKSUM_NONE; |
c09440f7 SD |
778 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); |
779 | skb_pull(skb, hdr_len); | |
780 | pskb_trim_unique(skb, skb->len - icv_len); | |
781 | } | |
782 | ||
783 | static void count_rx(struct net_device *dev, int len) | |
784 | { | |
785 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
786 | ||
787 | u64_stats_update_begin(&stats->syncp); | |
788 | stats->rx_packets++; | |
789 | stats->rx_bytes += len; | |
790 | u64_stats_update_end(&stats->syncp); | |
791 | } | |
792 | ||
793 | static void macsec_decrypt_done(struct crypto_async_request *base, int err) | |
794 | { | |
795 | struct sk_buff *skb = base->data; | |
796 | struct net_device *dev = skb->dev; | |
797 | struct macsec_dev *macsec = macsec_priv(dev); | |
798 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
c78ebe1d | 799 | struct macsec_rx_sc *rx_sc = rx_sa->sc; |
863483c9 | 800 | int len; |
c09440f7 SD |
801 | u32 pn; |
802 | ||
803 | aead_request_free(macsec_skb_cb(skb)->req); | |
804 | ||
b3bdc3ac LR |
805 | if (!err) |
806 | macsec_skb_cb(skb)->valid = true; | |
807 | ||
c09440f7 SD |
808 | rcu_read_lock_bh(); |
809 | pn = ntohl(macsec_ethhdr(skb)->packet_number); | |
810 | if (!macsec_post_decrypt(skb, &macsec->secy, pn)) { | |
811 | rcu_read_unlock_bh(); | |
812 | kfree_skb(skb); | |
813 | goto out; | |
814 | } | |
815 | ||
816 | macsec_finalize_skb(skb, macsec->secy.icv_len, | |
817 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
818 | macsec_reset_skb(skb, macsec->secy.netdev); | |
819 | ||
820 | len = skb->len; | |
863483c9 | 821 | if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS) |
c09440f7 | 822 | count_rx(dev, len); |
c09440f7 SD |
823 | |
824 | rcu_read_unlock_bh(); | |
825 | ||
826 | out: | |
827 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 828 | macsec_rxsc_put(rx_sc); |
c09440f7 | 829 | dev_put(dev); |
c09440f7 SD |
830 | } |
831 | ||
832 | static struct sk_buff *macsec_decrypt(struct sk_buff *skb, | |
833 | struct net_device *dev, | |
834 | struct macsec_rx_sa *rx_sa, | |
835 | sci_t sci, | |
836 | struct macsec_secy *secy) | |
837 | { | |
838 | int ret; | |
5d9649b3 | 839 | struct scatterlist *sg; |
5294b830 | 840 | struct sk_buff *trailer; |
5d9649b3 | 841 | unsigned char *iv; |
c09440f7 SD |
842 | struct aead_request *req; |
843 | struct macsec_eth_header *hdr; | |
844 | u16 icv_len = secy->icv_len; | |
845 | ||
846 | macsec_skb_cb(skb)->valid = false; | |
847 | skb = skb_share_check(skb, GFP_ATOMIC); | |
848 | if (!skb) | |
c3b7d0bd | 849 | return ERR_PTR(-ENOMEM); |
c09440f7 | 850 | |
5294b830 JD |
851 | ret = skb_cow_data(skb, 0, &trailer); |
852 | if (unlikely(ret < 0)) { | |
853 | kfree_skb(skb); | |
854 | return ERR_PTR(ret); | |
855 | } | |
856 | req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
857 | if (!req) { |
858 | kfree_skb(skb); | |
c3b7d0bd | 859 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
860 | } |
861 | ||
862 | hdr = (struct macsec_eth_header *)skb->data; | |
863 | macsec_fill_iv(iv, sci, ntohl(hdr->packet_number)); | |
864 | ||
5294b830 | 865 | sg_init_table(sg, ret); |
cda7ea69 JD |
866 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
867 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 868 | aead_request_free(req); |
cda7ea69 JD |
869 | kfree_skb(skb); |
870 | return ERR_PTR(ret); | |
871 | } | |
c09440f7 SD |
872 | |
873 | if (hdr->tci_an & MACSEC_TCI_E) { | |
874 | /* confidentiality: ethernet + macsec header | |
875 | * authenticated, encrypted payload | |
876 | */ | |
877 | int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci); | |
878 | ||
879 | aead_request_set_crypt(req, sg, sg, len, iv); | |
880 | aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci)); | |
881 | skb = skb_unshare(skb, GFP_ATOMIC); | |
882 | if (!skb) { | |
883 | aead_request_free(req); | |
c3b7d0bd | 884 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
885 | } |
886 | } else { | |
887 | /* integrity only: all headers + data authenticated */ | |
888 | aead_request_set_crypt(req, sg, sg, icv_len, iv); | |
889 | aead_request_set_ad(req, skb->len - icv_len); | |
890 | } | |
891 | ||
892 | macsec_skb_cb(skb)->req = req; | |
c09440f7 SD |
893 | skb->dev = dev; |
894 | aead_request_set_callback(req, 0, macsec_decrypt_done, skb); | |
895 | ||
896 | dev_hold(dev); | |
897 | ret = crypto_aead_decrypt(req); | |
898 | if (ret == -EINPROGRESS) { | |
c3b7d0bd | 899 | return ERR_PTR(ret); |
c09440f7 SD |
900 | } else if (ret != 0) { |
901 | /* decryption/authentication failed | |
902 | * 10.6 if validateFrames is disabled, deliver anyway | |
903 | */ | |
904 | if (ret != -EBADMSG) { | |
905 | kfree_skb(skb); | |
c3b7d0bd | 906 | skb = ERR_PTR(ret); |
c09440f7 SD |
907 | } |
908 | } else { | |
909 | macsec_skb_cb(skb)->valid = true; | |
910 | } | |
911 | dev_put(dev); | |
912 | ||
913 | aead_request_free(req); | |
914 | ||
915 | return skb; | |
916 | } | |
917 | ||
918 | static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) | |
919 | { | |
920 | struct macsec_rx_sc *rx_sc; | |
921 | ||
922 | for_each_rxsc(secy, rx_sc) { | |
923 | if (rx_sc->sci == sci) | |
924 | return rx_sc; | |
925 | } | |
926 | ||
927 | return NULL; | |
928 | } | |
929 | ||
930 | static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) | |
931 | { | |
932 | struct macsec_rx_sc *rx_sc; | |
933 | ||
934 | for_each_rxsc_rtnl(secy, rx_sc) { | |
935 | if (rx_sc->sci == sci) | |
936 | return rx_sc; | |
937 | } | |
938 | ||
939 | return NULL; | |
940 | } | |
941 | ||
3cf3227a | 942 | static enum rx_handler_result handle_not_macsec(struct sk_buff *skb) |
c09440f7 | 943 | { |
3cf3227a AT |
944 | /* Deliver to the uncontrolled port by default */ |
945 | enum rx_handler_result ret = RX_HANDLER_PASS; | |
c09440f7 SD |
946 | struct macsec_rxh_data *rxd; |
947 | struct macsec_dev *macsec; | |
948 | ||
949 | rcu_read_lock(); | |
950 | rxd = macsec_data_rcu(skb->dev); | |
951 | ||
952 | /* 10.6 If the management control validateFrames is not | |
953 | * Strict, frames without a SecTAG are received, counted, and | |
954 | * delivered to the Controlled Port | |
955 | */ | |
956 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
957 | struct sk_buff *nskb; | |
c09440f7 SD |
958 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
959 | ||
3cf3227a AT |
960 | if (!macsec_is_offloaded(macsec) && |
961 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
c09440f7 SD |
962 | u64_stats_update_begin(&secy_stats->syncp); |
963 | secy_stats->stats.InPktsNoTag++; | |
964 | u64_stats_update_end(&secy_stats->syncp); | |
965 | continue; | |
966 | } | |
967 | ||
968 | /* deliver on this port */ | |
969 | nskb = skb_clone(skb, GFP_ATOMIC); | |
970 | if (!nskb) | |
971 | break; | |
972 | ||
973 | nskb->dev = macsec->secy.netdev; | |
974 | ||
863483c9 | 975 | if (netif_rx(nskb) == NET_RX_SUCCESS) { |
c09440f7 SD |
976 | u64_stats_update_begin(&secy_stats->syncp); |
977 | secy_stats->stats.InPktsUntagged++; | |
978 | u64_stats_update_end(&secy_stats->syncp); | |
c09440f7 | 979 | } |
3cf3227a AT |
980 | |
981 | if (netif_running(macsec->secy.netdev) && | |
982 | macsec_is_offloaded(macsec)) { | |
983 | ret = RX_HANDLER_EXACT; | |
984 | goto out; | |
985 | } | |
c09440f7 SD |
986 | } |
987 | ||
3cf3227a | 988 | out: |
c09440f7 | 989 | rcu_read_unlock(); |
3cf3227a | 990 | return ret; |
c09440f7 SD |
991 | } |
992 | ||
993 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) | |
994 | { | |
995 | struct sk_buff *skb = *pskb; | |
996 | struct net_device *dev = skb->dev; | |
997 | struct macsec_eth_header *hdr; | |
998 | struct macsec_secy *secy = NULL; | |
999 | struct macsec_rx_sc *rx_sc; | |
1000 | struct macsec_rx_sa *rx_sa; | |
1001 | struct macsec_rxh_data *rxd; | |
1002 | struct macsec_dev *macsec; | |
1003 | sci_t sci; | |
1004 | u32 pn; | |
1005 | bool cbit; | |
1006 | struct pcpu_rx_sc_stats *rxsc_stats; | |
1007 | struct pcpu_secy_stats *secy_stats; | |
1008 | bool pulled_sci; | |
5491e7c6 | 1009 | int ret; |
c09440f7 SD |
1010 | |
1011 | if (skb_headroom(skb) < ETH_HLEN) | |
1012 | goto drop_direct; | |
1013 | ||
1014 | hdr = macsec_ethhdr(skb); | |
3cf3227a AT |
1015 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) |
1016 | return handle_not_macsec(skb); | |
c09440f7 SD |
1017 | |
1018 | skb = skb_unshare(skb, GFP_ATOMIC); | |
095c02da AS |
1019 | *pskb = skb; |
1020 | if (!skb) | |
c09440f7 | 1021 | return RX_HANDLER_CONSUMED; |
c09440f7 SD |
1022 | |
1023 | pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); | |
1024 | if (!pulled_sci) { | |
1025 | if (!pskb_may_pull(skb, macsec_extra_len(false))) | |
1026 | goto drop_direct; | |
1027 | } | |
1028 | ||
1029 | hdr = macsec_ethhdr(skb); | |
1030 | ||
1031 | /* Frames with a SecTAG that has the TCI E bit set but the C | |
1032 | * bit clear are discarded, as this reserved encoding is used | |
1033 | * to identify frames with a SecTAG that are not to be | |
1034 | * delivered to the Controlled Port. | |
1035 | */ | |
1036 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) | |
1037 | return RX_HANDLER_PASS; | |
1038 | ||
1039 | /* now, pull the extra length */ | |
1040 | if (hdr->tci_an & MACSEC_TCI_SC) { | |
1041 | if (!pulled_sci) | |
1042 | goto drop_direct; | |
1043 | } | |
1044 | ||
1045 | /* ethernet header is part of crypto processing */ | |
1046 | skb_push(skb, ETH_HLEN); | |
1047 | ||
1048 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); | |
1049 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; | |
1050 | sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); | |
1051 | ||
1052 | rcu_read_lock(); | |
1053 | rxd = macsec_data_rcu(skb->dev); | |
1054 | ||
1055 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1056 | struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); | |
7979472b | 1057 | |
c78ebe1d | 1058 | sc = sc ? macsec_rxsc_get(sc) : NULL; |
c09440f7 SD |
1059 | |
1060 | if (sc) { | |
1061 | secy = &macsec->secy; | |
1062 | rx_sc = sc; | |
1063 | break; | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | if (!secy) | |
1068 | goto nosci; | |
1069 | ||
1070 | dev = secy->netdev; | |
1071 | macsec = macsec_priv(dev); | |
1072 | secy_stats = this_cpu_ptr(macsec->stats); | |
1073 | rxsc_stats = this_cpu_ptr(rx_sc->stats); | |
1074 | ||
1075 | if (!macsec_validate_skb(skb, secy->icv_len)) { | |
1076 | u64_stats_update_begin(&secy_stats->syncp); | |
1077 | secy_stats->stats.InPktsBadTag++; | |
1078 | u64_stats_update_end(&secy_stats->syncp); | |
1079 | goto drop_nosa; | |
1080 | } | |
1081 | ||
1082 | rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); | |
1083 | if (!rx_sa) { | |
1084 | /* 10.6.1 if the SA is not in use */ | |
1085 | ||
1086 | /* If validateFrames is Strict or the C bit in the | |
1087 | * SecTAG is set, discard | |
1088 | */ | |
1089 | if (hdr->tci_an & MACSEC_TCI_C || | |
1090 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
1091 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1092 | rxsc_stats->stats.InPktsNotUsingSA++; | |
1093 | u64_stats_update_end(&rxsc_stats->syncp); | |
1094 | goto drop_nosa; | |
1095 | } | |
1096 | ||
1097 | /* not Strict, the frame (with the SecTAG and ICV | |
1098 | * removed) is delivered to the Controlled Port. | |
1099 | */ | |
1100 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1101 | rxsc_stats->stats.InPktsUnusedSA++; | |
1102 | u64_stats_update_end(&rxsc_stats->syncp); | |
1103 | goto deliver; | |
1104 | } | |
1105 | ||
1106 | /* First, PN check to avoid decrypting obviously wrong packets */ | |
1107 | pn = ntohl(hdr->packet_number); | |
1108 | if (secy->replay_protect) { | |
1109 | bool late; | |
1110 | ||
1111 | spin_lock(&rx_sa->lock); | |
1112 | late = rx_sa->next_pn >= secy->replay_window && | |
1113 | pn < (rx_sa->next_pn - secy->replay_window); | |
1114 | spin_unlock(&rx_sa->lock); | |
1115 | ||
1116 | if (late) { | |
1117 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1118 | rxsc_stats->stats.InPktsLate++; | |
1119 | u64_stats_update_end(&rxsc_stats->syncp); | |
1120 | goto drop; | |
1121 | } | |
1122 | } | |
1123 | ||
e3a3b626 BG |
1124 | macsec_skb_cb(skb)->rx_sa = rx_sa; |
1125 | ||
c09440f7 SD |
1126 | /* Disabled && !changed text => skip validation */ |
1127 | if (hdr->tci_an & MACSEC_TCI_C || | |
1128 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) | |
1129 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); | |
1130 | ||
c3b7d0bd SD |
1131 | if (IS_ERR(skb)) { |
1132 | /* the decrypt callback needs the reference */ | |
c78ebe1d | 1133 | if (PTR_ERR(skb) != -EINPROGRESS) { |
c3b7d0bd | 1134 | macsec_rxsa_put(rx_sa); |
c78ebe1d SD |
1135 | macsec_rxsc_put(rx_sc); |
1136 | } | |
c09440f7 SD |
1137 | rcu_read_unlock(); |
1138 | *pskb = NULL; | |
1139 | return RX_HANDLER_CONSUMED; | |
1140 | } | |
1141 | ||
1142 | if (!macsec_post_decrypt(skb, secy, pn)) | |
1143 | goto drop; | |
1144 | ||
1145 | deliver: | |
1146 | macsec_finalize_skb(skb, secy->icv_len, | |
1147 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1148 | macsec_reset_skb(skb, secy->netdev); | |
1149 | ||
497f358a SD |
1150 | if (rx_sa) |
1151 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 1152 | macsec_rxsc_put(rx_sc); |
5491e7c6 | 1153 | |
ba56d8ce | 1154 | skb_orphan(skb); |
5491e7c6 PA |
1155 | ret = gro_cells_receive(&macsec->gro_cells, skb); |
1156 | if (ret == NET_RX_SUCCESS) | |
1157 | count_rx(dev, skb->len); | |
1158 | else | |
1159 | macsec->secy.netdev->stats.rx_dropped++; | |
c09440f7 SD |
1160 | |
1161 | rcu_read_unlock(); | |
1162 | ||
5491e7c6 PA |
1163 | *pskb = NULL; |
1164 | return RX_HANDLER_CONSUMED; | |
c09440f7 SD |
1165 | |
1166 | drop: | |
1167 | macsec_rxsa_put(rx_sa); | |
1168 | drop_nosa: | |
c78ebe1d | 1169 | macsec_rxsc_put(rx_sc); |
c09440f7 SD |
1170 | rcu_read_unlock(); |
1171 | drop_direct: | |
1172 | kfree_skb(skb); | |
1173 | *pskb = NULL; | |
1174 | return RX_HANDLER_CONSUMED; | |
1175 | ||
1176 | nosci: | |
1177 | /* 10.6.1 if the SC is not found */ | |
1178 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); | |
1179 | if (!cbit) | |
1180 | macsec_finalize_skb(skb, DEFAULT_ICV_LEN, | |
1181 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1182 | ||
1183 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1184 | struct sk_buff *nskb; | |
c09440f7 SD |
1185 | |
1186 | secy_stats = this_cpu_ptr(macsec->stats); | |
1187 | ||
1188 | /* If validateFrames is Strict or the C bit in the | |
1189 | * SecTAG is set, discard | |
1190 | */ | |
1191 | if (cbit || | |
1192 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1193 | u64_stats_update_begin(&secy_stats->syncp); | |
1194 | secy_stats->stats.InPktsNoSCI++; | |
1195 | u64_stats_update_end(&secy_stats->syncp); | |
1196 | continue; | |
1197 | } | |
1198 | ||
1199 | /* not strict, the frame (with the SecTAG and ICV | |
1200 | * removed) is delivered to the Controlled Port. | |
1201 | */ | |
1202 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1203 | if (!nskb) | |
1204 | break; | |
1205 | ||
1206 | macsec_reset_skb(nskb, macsec->secy.netdev); | |
1207 | ||
1208 | ret = netif_rx(nskb); | |
1209 | if (ret == NET_RX_SUCCESS) { | |
1210 | u64_stats_update_begin(&secy_stats->syncp); | |
1211 | secy_stats->stats.InPktsUnknownSCI++; | |
1212 | u64_stats_update_end(&secy_stats->syncp); | |
1213 | } else { | |
1214 | macsec->secy.netdev->stats.rx_dropped++; | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | rcu_read_unlock(); | |
1219 | *pskb = skb; | |
1220 | return RX_HANDLER_PASS; | |
1221 | } | |
1222 | ||
1223 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) | |
1224 | { | |
1225 | struct crypto_aead *tfm; | |
1226 | int ret; | |
1227 | ||
6052f7fb | 1228 | tfm = crypto_alloc_aead("gcm(aes)", 0, 0); |
34aedfee DC |
1229 | |
1230 | if (IS_ERR(tfm)) | |
1231 | return tfm; | |
c09440f7 SD |
1232 | |
1233 | ret = crypto_aead_setkey(tfm, key, key_len); | |
34aedfee DC |
1234 | if (ret < 0) |
1235 | goto fail; | |
c09440f7 SD |
1236 | |
1237 | ret = crypto_aead_setauthsize(tfm, icv_len); | |
34aedfee DC |
1238 | if (ret < 0) |
1239 | goto fail; | |
c09440f7 SD |
1240 | |
1241 | return tfm; | |
34aedfee DC |
1242 | fail: |
1243 | crypto_free_aead(tfm); | |
1244 | return ERR_PTR(ret); | |
c09440f7 SD |
1245 | } |
1246 | ||
1247 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, | |
1248 | int icv_len) | |
1249 | { | |
1250 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); | |
1251 | if (!rx_sa->stats) | |
34aedfee | 1252 | return -ENOMEM; |
c09440f7 SD |
1253 | |
1254 | rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1255 | if (IS_ERR(rx_sa->key.tfm)) { |
c09440f7 | 1256 | free_percpu(rx_sa->stats); |
34aedfee | 1257 | return PTR_ERR(rx_sa->key.tfm); |
c09440f7 SD |
1258 | } |
1259 | ||
1260 | rx_sa->active = false; | |
1261 | rx_sa->next_pn = 1; | |
e187246f | 1262 | refcount_set(&rx_sa->refcnt, 1); |
c09440f7 SD |
1263 | spin_lock_init(&rx_sa->lock); |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) | |
1269 | { | |
1270 | rx_sa->active = false; | |
1271 | ||
1272 | macsec_rxsa_put(rx_sa); | |
1273 | } | |
1274 | ||
1275 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) | |
1276 | { | |
1277 | int i; | |
1278 | ||
1279 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
1280 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); | |
1281 | ||
1282 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); | |
1283 | if (sa) | |
1284 | clear_rx_sa(sa); | |
1285 | } | |
1286 | ||
1287 | macsec_rxsc_put(rx_sc); | |
1288 | } | |
1289 | ||
1290 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1291 | { | |
1292 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; | |
1293 | ||
1294 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); | |
1295 | rx_sc; | |
1296 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { | |
1297 | if (rx_sc->sci == sci) { | |
1298 | if (rx_sc->active) | |
1299 | secy->n_rx_sc--; | |
1300 | rcu_assign_pointer(*rx_scp, rx_sc->next); | |
1301 | return rx_sc; | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | return NULL; | |
1306 | } | |
1307 | ||
1308 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci) | |
1309 | { | |
1310 | struct macsec_rx_sc *rx_sc; | |
1311 | struct macsec_dev *macsec; | |
1312 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
1313 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
1314 | struct macsec_secy *secy; | |
1315 | ||
1316 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
1317 | if (find_rx_sc_rtnl(&macsec->secy, sci)) | |
1318 | return ERR_PTR(-EEXIST); | |
1319 | } | |
1320 | ||
1321 | rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); | |
1322 | if (!rx_sc) | |
1323 | return ERR_PTR(-ENOMEM); | |
1324 | ||
1325 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); | |
1326 | if (!rx_sc->stats) { | |
1327 | kfree(rx_sc); | |
1328 | return ERR_PTR(-ENOMEM); | |
1329 | } | |
1330 | ||
1331 | rx_sc->sci = sci; | |
1332 | rx_sc->active = true; | |
8676d76f | 1333 | refcount_set(&rx_sc->refcnt, 1); |
c09440f7 SD |
1334 | |
1335 | secy = &macsec_priv(dev)->secy; | |
1336 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); | |
1337 | rcu_assign_pointer(secy->rx_sc, rx_sc); | |
1338 | ||
1339 | if (rx_sc->active) | |
1340 | secy->n_rx_sc++; | |
1341 | ||
1342 | return rx_sc; | |
1343 | } | |
1344 | ||
1345 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, | |
1346 | int icv_len) | |
1347 | { | |
1348 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); | |
1349 | if (!tx_sa->stats) | |
34aedfee | 1350 | return -ENOMEM; |
c09440f7 SD |
1351 | |
1352 | tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1353 | if (IS_ERR(tx_sa->key.tfm)) { |
c09440f7 | 1354 | free_percpu(tx_sa->stats); |
34aedfee | 1355 | return PTR_ERR(tx_sa->key.tfm); |
c09440f7 SD |
1356 | } |
1357 | ||
1358 | tx_sa->active = false; | |
28206cdb | 1359 | refcount_set(&tx_sa->refcnt, 1); |
c09440f7 SD |
1360 | spin_lock_init(&tx_sa->lock); |
1361 | ||
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) | |
1366 | { | |
1367 | tx_sa->active = false; | |
1368 | ||
1369 | macsec_txsa_put(tx_sa); | |
1370 | } | |
1371 | ||
489111e5 | 1372 | static struct genl_family macsec_fam; |
c09440f7 SD |
1373 | |
1374 | static struct net_device *get_dev_from_nl(struct net *net, | |
1375 | struct nlattr **attrs) | |
1376 | { | |
1377 | int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); | |
1378 | struct net_device *dev; | |
1379 | ||
1380 | dev = __dev_get_by_index(net, ifindex); | |
1381 | if (!dev) | |
1382 | return ERR_PTR(-ENODEV); | |
1383 | ||
1384 | if (!netif_is_macsec(dev)) | |
1385 | return ERR_PTR(-ENODEV); | |
1386 | ||
1387 | return dev; | |
1388 | } | |
1389 | ||
1390 | static sci_t nla_get_sci(const struct nlattr *nla) | |
1391 | { | |
1392 | return (__force sci_t)nla_get_u64(nla); | |
1393 | } | |
1394 | ||
f60d94c0 ND |
1395 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1396 | int padattr) | |
c09440f7 | 1397 | { |
f60d94c0 | 1398 | return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
c09440f7 SD |
1399 | } |
1400 | ||
1401 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, | |
1402 | struct nlattr **attrs, | |
1403 | struct nlattr **tb_sa, | |
1404 | struct net_device **devp, | |
1405 | struct macsec_secy **secyp, | |
1406 | struct macsec_tx_sc **scp, | |
1407 | u8 *assoc_num) | |
1408 | { | |
1409 | struct net_device *dev; | |
1410 | struct macsec_secy *secy; | |
1411 | struct macsec_tx_sc *tx_sc; | |
1412 | struct macsec_tx_sa *tx_sa; | |
1413 | ||
1414 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1415 | return ERR_PTR(-EINVAL); | |
1416 | ||
1417 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1418 | ||
1419 | dev = get_dev_from_nl(net, attrs); | |
1420 | if (IS_ERR(dev)) | |
1421 | return ERR_CAST(dev); | |
1422 | ||
1423 | if (*assoc_num >= MACSEC_NUM_AN) | |
1424 | return ERR_PTR(-EINVAL); | |
1425 | ||
1426 | secy = &macsec_priv(dev)->secy; | |
1427 | tx_sc = &secy->tx_sc; | |
1428 | ||
1429 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); | |
1430 | if (!tx_sa) | |
1431 | return ERR_PTR(-ENODEV); | |
1432 | ||
1433 | *devp = dev; | |
1434 | *scp = tx_sc; | |
1435 | *secyp = secy; | |
1436 | return tx_sa; | |
1437 | } | |
1438 | ||
1439 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, | |
1440 | struct nlattr **attrs, | |
1441 | struct nlattr **tb_rxsc, | |
1442 | struct net_device **devp, | |
1443 | struct macsec_secy **secyp) | |
1444 | { | |
1445 | struct net_device *dev; | |
1446 | struct macsec_secy *secy; | |
1447 | struct macsec_rx_sc *rx_sc; | |
1448 | sci_t sci; | |
1449 | ||
1450 | dev = get_dev_from_nl(net, attrs); | |
1451 | if (IS_ERR(dev)) | |
1452 | return ERR_CAST(dev); | |
1453 | ||
1454 | secy = &macsec_priv(dev)->secy; | |
1455 | ||
1456 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1457 | return ERR_PTR(-EINVAL); | |
1458 | ||
1459 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1460 | rx_sc = find_rx_sc_rtnl(secy, sci); | |
1461 | if (!rx_sc) | |
1462 | return ERR_PTR(-ENODEV); | |
1463 | ||
1464 | *secyp = secy; | |
1465 | *devp = dev; | |
1466 | ||
1467 | return rx_sc; | |
1468 | } | |
1469 | ||
1470 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, | |
1471 | struct nlattr **attrs, | |
1472 | struct nlattr **tb_rxsc, | |
1473 | struct nlattr **tb_sa, | |
1474 | struct net_device **devp, | |
1475 | struct macsec_secy **secyp, | |
1476 | struct macsec_rx_sc **scp, | |
1477 | u8 *assoc_num) | |
1478 | { | |
1479 | struct macsec_rx_sc *rx_sc; | |
1480 | struct macsec_rx_sa *rx_sa; | |
1481 | ||
1482 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1483 | return ERR_PTR(-EINVAL); | |
1484 | ||
1485 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1486 | if (*assoc_num >= MACSEC_NUM_AN) | |
1487 | return ERR_PTR(-EINVAL); | |
1488 | ||
1489 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); | |
1490 | if (IS_ERR(rx_sc)) | |
1491 | return ERR_CAST(rx_sc); | |
1492 | ||
1493 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); | |
1494 | if (!rx_sa) | |
1495 | return ERR_PTR(-ENODEV); | |
1496 | ||
1497 | *scp = rx_sc; | |
1498 | return rx_sa; | |
1499 | } | |
1500 | ||
c09440f7 SD |
1501 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { |
1502 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
1503 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, | |
1504 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, | |
dcb780fb | 1505 | [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED }, |
c09440f7 SD |
1506 | }; |
1507 | ||
1508 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { | |
1509 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, | |
1510 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1511 | }; | |
1512 | ||
1513 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { | |
1514 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, | |
1515 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1516 | [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 }, | |
8acca6ac SD |
1517 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1518 | .len = MACSEC_KEYID_LEN, }, | |
c09440f7 | 1519 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
e8660ded | 1520 | .len = MACSEC_MAX_KEY_LEN, }, |
c09440f7 SD |
1521 | }; |
1522 | ||
dcb780fb AT |
1523 | static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = { |
1524 | [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 }, | |
1525 | }; | |
1526 | ||
3cf3227a AT |
1527 | /* Offloads an operation to a device driver */ |
1528 | static int macsec_offload(int (* const func)(struct macsec_context *), | |
1529 | struct macsec_context *ctx) | |
1530 | { | |
1531 | int ret; | |
1532 | ||
1533 | if (unlikely(!func)) | |
1534 | return 0; | |
1535 | ||
1536 | if (ctx->offload == MACSEC_OFFLOAD_PHY) | |
1537 | mutex_lock(&ctx->phydev->lock); | |
1538 | ||
1539 | /* Phase I: prepare. The drive should fail here if there are going to be | |
1540 | * issues in the commit phase. | |
1541 | */ | |
1542 | ctx->prepare = true; | |
1543 | ret = (*func)(ctx); | |
1544 | if (ret) | |
1545 | goto phy_unlock; | |
1546 | ||
1547 | /* Phase II: commit. This step cannot fail. */ | |
1548 | ctx->prepare = false; | |
1549 | ret = (*func)(ctx); | |
1550 | /* This should never happen: commit is not allowed to fail */ | |
1551 | if (unlikely(ret)) | |
1552 | WARN(1, "MACsec offloading commit failed (%d)\n", ret); | |
1553 | ||
1554 | phy_unlock: | |
1555 | if (ctx->offload == MACSEC_OFFLOAD_PHY) | |
1556 | mutex_unlock(&ctx->phydev->lock); | |
1557 | ||
1558 | return ret; | |
1559 | } | |
1560 | ||
c09440f7 SD |
1561 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) |
1562 | { | |
1563 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) | |
1564 | return -EINVAL; | |
1565 | ||
8cb08174 | 1566 | if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL)) |
c09440f7 SD |
1567 | return -EINVAL; |
1568 | ||
1569 | return 0; | |
1570 | } | |
1571 | ||
1572 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) | |
1573 | { | |
1574 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) | |
1575 | return -EINVAL; | |
1576 | ||
8cb08174 | 1577 | if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL)) |
c09440f7 SD |
1578 | return -EINVAL; |
1579 | ||
1580 | return 0; | |
1581 | } | |
1582 | ||
1583 | static bool validate_add_rxsa(struct nlattr **attrs) | |
1584 | { | |
1585 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1586 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1587 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1588 | return false; | |
1589 | ||
1590 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1591 | return false; | |
1592 | ||
1593 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1594 | return false; | |
1595 | ||
1596 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1597 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1598 | return false; | |
1599 | } | |
1600 | ||
8acca6ac SD |
1601 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1602 | return false; | |
1603 | ||
c09440f7 SD |
1604 | return true; |
1605 | } | |
1606 | ||
1607 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1608 | { | |
1609 | struct net_device *dev; | |
1610 | struct nlattr **attrs = info->attrs; | |
1611 | struct macsec_secy *secy; | |
1612 | struct macsec_rx_sc *rx_sc; | |
1613 | struct macsec_rx_sa *rx_sa; | |
1614 | unsigned char assoc_num; | |
1615 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1616 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1617 | int err; |
c09440f7 SD |
1618 | |
1619 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1620 | return -EINVAL; | |
1621 | ||
1622 | if (parse_sa_config(attrs, tb_sa)) | |
1623 | return -EINVAL; | |
1624 | ||
1625 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1626 | return -EINVAL; | |
1627 | ||
1628 | if (!validate_add_rxsa(tb_sa)) | |
1629 | return -EINVAL; | |
1630 | ||
1631 | rtnl_lock(); | |
1632 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
36b232c8 | 1633 | if (IS_ERR(rx_sc)) { |
c09440f7 SD |
1634 | rtnl_unlock(); |
1635 | return PTR_ERR(rx_sc); | |
1636 | } | |
1637 | ||
1638 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1639 | ||
1640 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1641 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", | |
1642 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1643 | rtnl_unlock(); | |
1644 | return -EINVAL; | |
1645 | } | |
1646 | ||
1647 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); | |
1648 | if (rx_sa) { | |
1649 | rtnl_unlock(); | |
1650 | return -EBUSY; | |
1651 | } | |
1652 | ||
1653 | rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); | |
34aedfee | 1654 | if (!rx_sa) { |
c09440f7 SD |
1655 | rtnl_unlock(); |
1656 | return -ENOMEM; | |
1657 | } | |
1658 | ||
34aedfee DC |
1659 | err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1660 | secy->key_len, secy->icv_len); | |
1661 | if (err < 0) { | |
1662 | kfree(rx_sa); | |
1663 | rtnl_unlock(); | |
1664 | return err; | |
1665 | } | |
1666 | ||
c09440f7 SD |
1667 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
1668 | spin_lock_bh(&rx_sa->lock); | |
1669 | rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
1670 | spin_unlock_bh(&rx_sa->lock); | |
1671 | } | |
1672 | ||
1673 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1674 | rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1675 | ||
c09440f7 | 1676 | rx_sa->sc = rx_sc; |
3cf3227a AT |
1677 | |
1678 | /* If h/w offloading is available, propagate to the device */ | |
1679 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
1680 | const struct macsec_ops *ops; | |
1681 | struct macsec_context ctx; | |
1682 | ||
1683 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1684 | if (!ops) { | |
1685 | err = -EOPNOTSUPP; | |
1686 | goto cleanup; | |
1687 | } | |
1688 | ||
1689 | ctx.sa.assoc_num = assoc_num; | |
1690 | ctx.sa.rx_sa = rx_sa; | |
1691 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), | |
1692 | MACSEC_KEYID_LEN); | |
1693 | ||
1694 | err = macsec_offload(ops->mdo_add_rxsa, &ctx); | |
1695 | if (err) | |
1696 | goto cleanup; | |
1697 | } | |
1698 | ||
1699 | nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); | |
c09440f7 SD |
1700 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); |
1701 | ||
1702 | rtnl_unlock(); | |
1703 | ||
1704 | return 0; | |
3cf3227a AT |
1705 | |
1706 | cleanup: | |
1707 | kfree(rx_sa); | |
1708 | rtnl_unlock(); | |
1709 | return err; | |
c09440f7 SD |
1710 | } |
1711 | ||
1712 | static bool validate_add_rxsc(struct nlattr **attrs) | |
1713 | { | |
1714 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) | |
1715 | return false; | |
1716 | ||
1717 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { | |
1718 | if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) | |
1719 | return false; | |
1720 | } | |
1721 | ||
1722 | return true; | |
1723 | } | |
1724 | ||
1725 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1726 | { | |
1727 | struct net_device *dev; | |
1728 | sci_t sci = MACSEC_UNDEF_SCI; | |
1729 | struct nlattr **attrs = info->attrs; | |
1730 | struct macsec_rx_sc *rx_sc; | |
1731 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a AT |
1732 | bool was_active; |
1733 | int ret; | |
c09440f7 SD |
1734 | |
1735 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1736 | return -EINVAL; | |
1737 | ||
1738 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1739 | return -EINVAL; | |
1740 | ||
1741 | if (!validate_add_rxsc(tb_rxsc)) | |
1742 | return -EINVAL; | |
1743 | ||
1744 | rtnl_lock(); | |
1745 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1746 | if (IS_ERR(dev)) { | |
1747 | rtnl_unlock(); | |
1748 | return PTR_ERR(dev); | |
1749 | } | |
1750 | ||
1751 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1752 | ||
1753 | rx_sc = create_rx_sc(dev, sci); | |
1754 | if (IS_ERR(rx_sc)) { | |
1755 | rtnl_unlock(); | |
1756 | return PTR_ERR(rx_sc); | |
1757 | } | |
1758 | ||
3cf3227a | 1759 | was_active = rx_sc->active; |
c09440f7 SD |
1760 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) |
1761 | rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
1762 | ||
3cf3227a AT |
1763 | if (macsec_is_offloaded(netdev_priv(dev))) { |
1764 | const struct macsec_ops *ops; | |
1765 | struct macsec_context ctx; | |
1766 | ||
1767 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1768 | if (!ops) { | |
1769 | ret = -EOPNOTSUPP; | |
1770 | goto cleanup; | |
1771 | } | |
1772 | ||
1773 | ctx.rx_sc = rx_sc; | |
1774 | ||
1775 | ret = macsec_offload(ops->mdo_add_rxsc, &ctx); | |
1776 | if (ret) | |
1777 | goto cleanup; | |
1778 | } | |
1779 | ||
c09440f7 SD |
1780 | rtnl_unlock(); |
1781 | ||
1782 | return 0; | |
3cf3227a AT |
1783 | |
1784 | cleanup: | |
1785 | rx_sc->active = was_active; | |
1786 | rtnl_unlock(); | |
1787 | return ret; | |
c09440f7 SD |
1788 | } |
1789 | ||
1790 | static bool validate_add_txsa(struct nlattr **attrs) | |
1791 | { | |
1792 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1793 | !attrs[MACSEC_SA_ATTR_PN] || | |
1794 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1795 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1796 | return false; | |
1797 | ||
1798 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1799 | return false; | |
1800 | ||
1801 | if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1802 | return false; | |
1803 | ||
1804 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1805 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1806 | return false; | |
1807 | } | |
1808 | ||
8acca6ac SD |
1809 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1810 | return false; | |
1811 | ||
c09440f7 SD |
1812 | return true; |
1813 | } | |
1814 | ||
1815 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) | |
1816 | { | |
1817 | struct net_device *dev; | |
1818 | struct nlattr **attrs = info->attrs; | |
1819 | struct macsec_secy *secy; | |
1820 | struct macsec_tx_sc *tx_sc; | |
1821 | struct macsec_tx_sa *tx_sa; | |
1822 | unsigned char assoc_num; | |
1823 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 1824 | bool was_operational; |
34aedfee | 1825 | int err; |
c09440f7 SD |
1826 | |
1827 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1828 | return -EINVAL; | |
1829 | ||
1830 | if (parse_sa_config(attrs, tb_sa)) | |
1831 | return -EINVAL; | |
1832 | ||
1833 | if (!validate_add_txsa(tb_sa)) | |
1834 | return -EINVAL; | |
1835 | ||
1836 | rtnl_lock(); | |
1837 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1838 | if (IS_ERR(dev)) { | |
1839 | rtnl_unlock(); | |
1840 | return PTR_ERR(dev); | |
1841 | } | |
1842 | ||
1843 | secy = &macsec_priv(dev)->secy; | |
1844 | tx_sc = &secy->tx_sc; | |
1845 | ||
1846 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1847 | ||
1848 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1849 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", | |
1850 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1851 | rtnl_unlock(); | |
1852 | return -EINVAL; | |
1853 | } | |
1854 | ||
1855 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); | |
1856 | if (tx_sa) { | |
1857 | rtnl_unlock(); | |
1858 | return -EBUSY; | |
1859 | } | |
1860 | ||
1861 | tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); | |
34aedfee | 1862 | if (!tx_sa) { |
c09440f7 SD |
1863 | rtnl_unlock(); |
1864 | return -ENOMEM; | |
1865 | } | |
1866 | ||
34aedfee DC |
1867 | err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1868 | secy->key_len, secy->icv_len); | |
1869 | if (err < 0) { | |
1870 | kfree(tx_sa); | |
1871 | rtnl_unlock(); | |
1872 | return err; | |
1873 | } | |
1874 | ||
c09440f7 SD |
1875 | spin_lock_bh(&tx_sa->lock); |
1876 | tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); | |
1877 | spin_unlock_bh(&tx_sa->lock); | |
1878 | ||
1879 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1880 | tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1881 | ||
3cf3227a | 1882 | was_operational = secy->operational; |
c09440f7 SD |
1883 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) |
1884 | secy->operational = true; | |
1885 | ||
3cf3227a AT |
1886 | /* If h/w offloading is available, propagate to the device */ |
1887 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
1888 | const struct macsec_ops *ops; | |
1889 | struct macsec_context ctx; | |
1890 | ||
1891 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1892 | if (!ops) { | |
1893 | err = -EOPNOTSUPP; | |
1894 | goto cleanup; | |
1895 | } | |
1896 | ||
1897 | ctx.sa.assoc_num = assoc_num; | |
1898 | ctx.sa.tx_sa = tx_sa; | |
1899 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), | |
1900 | MACSEC_KEYID_LEN); | |
1901 | ||
1902 | err = macsec_offload(ops->mdo_add_txsa, &ctx); | |
1903 | if (err) | |
1904 | goto cleanup; | |
1905 | } | |
1906 | ||
1907 | nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); | |
c09440f7 SD |
1908 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); |
1909 | ||
1910 | rtnl_unlock(); | |
1911 | ||
1912 | return 0; | |
3cf3227a AT |
1913 | |
1914 | cleanup: | |
1915 | secy->operational = was_operational; | |
1916 | kfree(tx_sa); | |
1917 | rtnl_unlock(); | |
1918 | return err; | |
c09440f7 SD |
1919 | } |
1920 | ||
1921 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1922 | { | |
1923 | struct nlattr **attrs = info->attrs; | |
1924 | struct net_device *dev; | |
1925 | struct macsec_secy *secy; | |
1926 | struct macsec_rx_sc *rx_sc; | |
1927 | struct macsec_rx_sa *rx_sa; | |
1928 | u8 assoc_num; | |
1929 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
1930 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 1931 | int ret; |
c09440f7 SD |
1932 | |
1933 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1934 | return -EINVAL; | |
1935 | ||
1936 | if (parse_sa_config(attrs, tb_sa)) | |
1937 | return -EINVAL; | |
1938 | ||
1939 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1940 | return -EINVAL; | |
1941 | ||
1942 | rtnl_lock(); | |
1943 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
1944 | &dev, &secy, &rx_sc, &assoc_num); | |
1945 | if (IS_ERR(rx_sa)) { | |
1946 | rtnl_unlock(); | |
1947 | return PTR_ERR(rx_sa); | |
1948 | } | |
1949 | ||
1950 | if (rx_sa->active) { | |
1951 | rtnl_unlock(); | |
1952 | return -EBUSY; | |
1953 | } | |
1954 | ||
3cf3227a AT |
1955 | /* If h/w offloading is available, propagate to the device */ |
1956 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
1957 | const struct macsec_ops *ops; | |
1958 | struct macsec_context ctx; | |
1959 | ||
1960 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1961 | if (!ops) { | |
1962 | ret = -EOPNOTSUPP; | |
1963 | goto cleanup; | |
1964 | } | |
1965 | ||
1966 | ctx.sa.assoc_num = assoc_num; | |
1967 | ctx.sa.rx_sa = rx_sa; | |
1968 | ||
1969 | ret = macsec_offload(ops->mdo_del_rxsa, &ctx); | |
1970 | if (ret) | |
1971 | goto cleanup; | |
1972 | } | |
1973 | ||
c09440f7 SD |
1974 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); |
1975 | clear_rx_sa(rx_sa); | |
1976 | ||
1977 | rtnl_unlock(); | |
1978 | ||
1979 | return 0; | |
3cf3227a AT |
1980 | |
1981 | cleanup: | |
1982 | rtnl_unlock(); | |
1983 | return ret; | |
c09440f7 SD |
1984 | } |
1985 | ||
1986 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1987 | { | |
1988 | struct nlattr **attrs = info->attrs; | |
1989 | struct net_device *dev; | |
1990 | struct macsec_secy *secy; | |
1991 | struct macsec_rx_sc *rx_sc; | |
1992 | sci_t sci; | |
1993 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a | 1994 | int ret; |
c09440f7 SD |
1995 | |
1996 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1997 | return -EINVAL; | |
1998 | ||
1999 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2000 | return -EINVAL; | |
2001 | ||
2002 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
2003 | return -EINVAL; | |
2004 | ||
2005 | rtnl_lock(); | |
2006 | dev = get_dev_from_nl(genl_info_net(info), info->attrs); | |
2007 | if (IS_ERR(dev)) { | |
2008 | rtnl_unlock(); | |
2009 | return PTR_ERR(dev); | |
2010 | } | |
2011 | ||
2012 | secy = &macsec_priv(dev)->secy; | |
2013 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
2014 | ||
2015 | rx_sc = del_rx_sc(secy, sci); | |
2016 | if (!rx_sc) { | |
2017 | rtnl_unlock(); | |
2018 | return -ENODEV; | |
2019 | } | |
2020 | ||
3cf3227a AT |
2021 | /* If h/w offloading is available, propagate to the device */ |
2022 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2023 | const struct macsec_ops *ops; | |
2024 | struct macsec_context ctx; | |
2025 | ||
2026 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2027 | if (!ops) { | |
2028 | ret = -EOPNOTSUPP; | |
2029 | goto cleanup; | |
2030 | } | |
2031 | ||
2032 | ctx.rx_sc = rx_sc; | |
2033 | ret = macsec_offload(ops->mdo_del_rxsc, &ctx); | |
2034 | if (ret) | |
2035 | goto cleanup; | |
2036 | } | |
2037 | ||
c09440f7 SD |
2038 | free_rx_sc(rx_sc); |
2039 | rtnl_unlock(); | |
2040 | ||
2041 | return 0; | |
3cf3227a AT |
2042 | |
2043 | cleanup: | |
2044 | rtnl_unlock(); | |
2045 | return ret; | |
c09440f7 SD |
2046 | } |
2047 | ||
2048 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) | |
2049 | { | |
2050 | struct nlattr **attrs = info->attrs; | |
2051 | struct net_device *dev; | |
2052 | struct macsec_secy *secy; | |
2053 | struct macsec_tx_sc *tx_sc; | |
2054 | struct macsec_tx_sa *tx_sa; | |
2055 | u8 assoc_num; | |
2056 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2057 | int ret; |
c09440f7 SD |
2058 | |
2059 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2060 | return -EINVAL; | |
2061 | ||
2062 | if (parse_sa_config(attrs, tb_sa)) | |
2063 | return -EINVAL; | |
2064 | ||
2065 | rtnl_lock(); | |
2066 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2067 | &dev, &secy, &tx_sc, &assoc_num); | |
2068 | if (IS_ERR(tx_sa)) { | |
2069 | rtnl_unlock(); | |
2070 | return PTR_ERR(tx_sa); | |
2071 | } | |
2072 | ||
2073 | if (tx_sa->active) { | |
2074 | rtnl_unlock(); | |
2075 | return -EBUSY; | |
2076 | } | |
2077 | ||
3cf3227a AT |
2078 | /* If h/w offloading is available, propagate to the device */ |
2079 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2080 | const struct macsec_ops *ops; | |
2081 | struct macsec_context ctx; | |
2082 | ||
2083 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2084 | if (!ops) { | |
2085 | ret = -EOPNOTSUPP; | |
2086 | goto cleanup; | |
2087 | } | |
2088 | ||
2089 | ctx.sa.assoc_num = assoc_num; | |
2090 | ctx.sa.tx_sa = tx_sa; | |
2091 | ||
2092 | ret = macsec_offload(ops->mdo_del_txsa, &ctx); | |
2093 | if (ret) | |
2094 | goto cleanup; | |
2095 | } | |
2096 | ||
c09440f7 SD |
2097 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); |
2098 | clear_tx_sa(tx_sa); | |
2099 | ||
2100 | rtnl_unlock(); | |
2101 | ||
2102 | return 0; | |
3cf3227a AT |
2103 | |
2104 | cleanup: | |
2105 | rtnl_unlock(); | |
2106 | return ret; | |
c09440f7 SD |
2107 | } |
2108 | ||
2109 | static bool validate_upd_sa(struct nlattr **attrs) | |
2110 | { | |
2111 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
2112 | attrs[MACSEC_SA_ATTR_KEY] || | |
2113 | attrs[MACSEC_SA_ATTR_KEYID]) | |
2114 | return false; | |
2115 | ||
2116 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
2117 | return false; | |
2118 | ||
2119 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
2120 | return false; | |
2121 | ||
2122 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
2123 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
2124 | return false; | |
2125 | } | |
2126 | ||
2127 | return true; | |
2128 | } | |
2129 | ||
2130 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) | |
2131 | { | |
2132 | struct nlattr **attrs = info->attrs; | |
2133 | struct net_device *dev; | |
2134 | struct macsec_secy *secy; | |
2135 | struct macsec_tx_sc *tx_sc; | |
2136 | struct macsec_tx_sa *tx_sa; | |
2137 | u8 assoc_num; | |
2138 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a AT |
2139 | bool was_operational, was_active; |
2140 | u32 prev_pn = 0; | |
2141 | int ret = 0; | |
c09440f7 SD |
2142 | |
2143 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2144 | return -EINVAL; | |
2145 | ||
2146 | if (parse_sa_config(attrs, tb_sa)) | |
2147 | return -EINVAL; | |
2148 | ||
2149 | if (!validate_upd_sa(tb_sa)) | |
2150 | return -EINVAL; | |
2151 | ||
2152 | rtnl_lock(); | |
2153 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2154 | &dev, &secy, &tx_sc, &assoc_num); | |
2155 | if (IS_ERR(tx_sa)) { | |
2156 | rtnl_unlock(); | |
2157 | return PTR_ERR(tx_sa); | |
2158 | } | |
2159 | ||
2160 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2161 | spin_lock_bh(&tx_sa->lock); | |
3cf3227a | 2162 | prev_pn = tx_sa->next_pn; |
c09440f7 SD |
2163 | tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); |
2164 | spin_unlock_bh(&tx_sa->lock); | |
2165 | } | |
2166 | ||
3cf3227a | 2167 | was_active = tx_sa->active; |
c09440f7 SD |
2168 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2169 | tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2170 | ||
3cf3227a | 2171 | was_operational = secy->operational; |
c09440f7 SD |
2172 | if (assoc_num == tx_sc->encoding_sa) |
2173 | secy->operational = tx_sa->active; | |
2174 | ||
3cf3227a AT |
2175 | /* If h/w offloading is available, propagate to the device */ |
2176 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2177 | const struct macsec_ops *ops; | |
2178 | struct macsec_context ctx; | |
2179 | ||
2180 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2181 | if (!ops) { | |
2182 | ret = -EOPNOTSUPP; | |
2183 | goto cleanup; | |
2184 | } | |
2185 | ||
2186 | ctx.sa.assoc_num = assoc_num; | |
2187 | ctx.sa.tx_sa = tx_sa; | |
2188 | ||
2189 | ret = macsec_offload(ops->mdo_upd_txsa, &ctx); | |
2190 | if (ret) | |
2191 | goto cleanup; | |
2192 | } | |
2193 | ||
c09440f7 SD |
2194 | rtnl_unlock(); |
2195 | ||
2196 | return 0; | |
3cf3227a AT |
2197 | |
2198 | cleanup: | |
2199 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2200 | spin_lock_bh(&tx_sa->lock); | |
2201 | tx_sa->next_pn = prev_pn; | |
2202 | spin_unlock_bh(&tx_sa->lock); | |
2203 | } | |
2204 | tx_sa->active = was_active; | |
2205 | secy->operational = was_operational; | |
2206 | rtnl_unlock(); | |
2207 | return ret; | |
c09440f7 SD |
2208 | } |
2209 | ||
2210 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2211 | { | |
2212 | struct nlattr **attrs = info->attrs; | |
2213 | struct net_device *dev; | |
2214 | struct macsec_secy *secy; | |
2215 | struct macsec_rx_sc *rx_sc; | |
2216 | struct macsec_rx_sa *rx_sa; | |
2217 | u8 assoc_num; | |
2218 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2219 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a AT |
2220 | bool was_active; |
2221 | u32 prev_pn = 0; | |
2222 | int ret = 0; | |
c09440f7 SD |
2223 | |
2224 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2225 | return -EINVAL; | |
2226 | ||
2227 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2228 | return -EINVAL; | |
2229 | ||
2230 | if (parse_sa_config(attrs, tb_sa)) | |
2231 | return -EINVAL; | |
2232 | ||
2233 | if (!validate_upd_sa(tb_sa)) | |
2234 | return -EINVAL; | |
2235 | ||
2236 | rtnl_lock(); | |
2237 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2238 | &dev, &secy, &rx_sc, &assoc_num); | |
2239 | if (IS_ERR(rx_sa)) { | |
2240 | rtnl_unlock(); | |
2241 | return PTR_ERR(rx_sa); | |
2242 | } | |
2243 | ||
2244 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2245 | spin_lock_bh(&rx_sa->lock); | |
3cf3227a | 2246 | prev_pn = rx_sa->next_pn; |
c09440f7 SD |
2247 | rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); |
2248 | spin_unlock_bh(&rx_sa->lock); | |
2249 | } | |
2250 | ||
3cf3227a | 2251 | was_active = rx_sa->active; |
c09440f7 SD |
2252 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2253 | rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2254 | ||
3cf3227a AT |
2255 | /* If h/w offloading is available, propagate to the device */ |
2256 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2257 | const struct macsec_ops *ops; | |
2258 | struct macsec_context ctx; | |
2259 | ||
2260 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2261 | if (!ops) { | |
2262 | ret = -EOPNOTSUPP; | |
2263 | goto cleanup; | |
2264 | } | |
2265 | ||
2266 | ctx.sa.assoc_num = assoc_num; | |
2267 | ctx.sa.rx_sa = rx_sa; | |
2268 | ||
2269 | ret = macsec_offload(ops->mdo_upd_rxsa, &ctx); | |
2270 | if (ret) | |
2271 | goto cleanup; | |
2272 | } | |
2273 | ||
c09440f7 SD |
2274 | rtnl_unlock(); |
2275 | return 0; | |
3cf3227a AT |
2276 | |
2277 | cleanup: | |
2278 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2279 | spin_lock_bh(&rx_sa->lock); | |
2280 | rx_sa->next_pn = prev_pn; | |
2281 | spin_unlock_bh(&rx_sa->lock); | |
2282 | } | |
2283 | rx_sa->active = was_active; | |
2284 | rtnl_unlock(); | |
2285 | return ret; | |
c09440f7 SD |
2286 | } |
2287 | ||
2288 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2289 | { | |
2290 | struct nlattr **attrs = info->attrs; | |
2291 | struct net_device *dev; | |
2292 | struct macsec_secy *secy; | |
2293 | struct macsec_rx_sc *rx_sc; | |
2294 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a AT |
2295 | unsigned int prev_n_rx_sc; |
2296 | bool was_active; | |
2297 | int ret; | |
c09440f7 SD |
2298 | |
2299 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2300 | return -EINVAL; | |
2301 | ||
2302 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2303 | return -EINVAL; | |
2304 | ||
2305 | if (!validate_add_rxsc(tb_rxsc)) | |
2306 | return -EINVAL; | |
2307 | ||
2308 | rtnl_lock(); | |
2309 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
2310 | if (IS_ERR(rx_sc)) { | |
2311 | rtnl_unlock(); | |
2312 | return PTR_ERR(rx_sc); | |
2313 | } | |
2314 | ||
3cf3227a AT |
2315 | was_active = rx_sc->active; |
2316 | prev_n_rx_sc = secy->n_rx_sc; | |
c09440f7 SD |
2317 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { |
2318 | bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
2319 | ||
2320 | if (rx_sc->active != new) | |
2321 | secy->n_rx_sc += new ? 1 : -1; | |
2322 | ||
2323 | rx_sc->active = new; | |
2324 | } | |
2325 | ||
3cf3227a AT |
2326 | /* If h/w offloading is available, propagate to the device */ |
2327 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2328 | const struct macsec_ops *ops; | |
2329 | struct macsec_context ctx; | |
2330 | ||
2331 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2332 | if (!ops) { | |
2333 | ret = -EOPNOTSUPP; | |
2334 | goto cleanup; | |
2335 | } | |
2336 | ||
2337 | ctx.rx_sc = rx_sc; | |
2338 | ||
2339 | ret = macsec_offload(ops->mdo_upd_rxsc, &ctx); | |
2340 | if (ret) | |
2341 | goto cleanup; | |
2342 | } | |
2343 | ||
c09440f7 SD |
2344 | rtnl_unlock(); |
2345 | ||
2346 | return 0; | |
3cf3227a AT |
2347 | |
2348 | cleanup: | |
2349 | secy->n_rx_sc = prev_n_rx_sc; | |
2350 | rx_sc->active = was_active; | |
2351 | rtnl_unlock(); | |
2352 | return ret; | |
c09440f7 SD |
2353 | } |
2354 | ||
dcb780fb AT |
2355 | static bool macsec_is_configured(struct macsec_dev *macsec) |
2356 | { | |
2357 | struct macsec_secy *secy = &macsec->secy; | |
2358 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2359 | int i; | |
2360 | ||
2361 | if (secy->n_rx_sc > 0) | |
2362 | return true; | |
2363 | ||
2364 | for (i = 0; i < MACSEC_NUM_AN; i++) | |
2365 | if (tx_sc->sa[i]) | |
2366 | return true; | |
2367 | ||
2368 | return false; | |
2369 | } | |
2370 | ||
2371 | static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info) | |
2372 | { | |
2373 | struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1]; | |
2374 | enum macsec_offload offload, prev_offload; | |
2375 | int (*func)(struct macsec_context *ctx); | |
2376 | struct nlattr **attrs = info->attrs; | |
2377 | struct net_device *dev, *loop_dev; | |
2378 | const struct macsec_ops *ops; | |
2379 | struct macsec_context ctx; | |
2380 | struct macsec_dev *macsec; | |
2381 | struct net *loop_net; | |
2382 | int ret; | |
2383 | ||
2384 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2385 | return -EINVAL; | |
2386 | ||
2387 | if (!attrs[MACSEC_ATTR_OFFLOAD]) | |
2388 | return -EINVAL; | |
2389 | ||
2390 | if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX, | |
2391 | attrs[MACSEC_ATTR_OFFLOAD], | |
2392 | macsec_genl_offload_policy, NULL)) | |
2393 | return -EINVAL; | |
2394 | ||
2395 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
2396 | if (IS_ERR(dev)) | |
2397 | return PTR_ERR(dev); | |
2398 | macsec = macsec_priv(dev); | |
2399 | ||
2400 | offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]); | |
2401 | if (macsec->offload == offload) | |
2402 | return 0; | |
2403 | ||
2404 | /* Check if the offloading mode is supported by the underlying layers */ | |
2405 | if (offload != MACSEC_OFFLOAD_OFF && | |
2406 | !macsec_check_offload(offload, macsec)) | |
2407 | return -EOPNOTSUPP; | |
2408 | ||
2409 | if (offload == MACSEC_OFFLOAD_OFF) | |
2410 | goto skip_limitation; | |
2411 | ||
2412 | /* Check the physical interface isn't offloading another interface | |
2413 | * first. | |
2414 | */ | |
2415 | for_each_net(loop_net) { | |
2416 | for_each_netdev(loop_net, loop_dev) { | |
2417 | struct macsec_dev *priv; | |
2418 | ||
2419 | if (!netif_is_macsec(loop_dev)) | |
2420 | continue; | |
2421 | ||
2422 | priv = macsec_priv(loop_dev); | |
2423 | ||
2424 | if (priv->real_dev == macsec->real_dev && | |
2425 | priv->offload != MACSEC_OFFLOAD_OFF) | |
2426 | return -EBUSY; | |
2427 | } | |
2428 | } | |
2429 | ||
2430 | skip_limitation: | |
2431 | /* Check if the net device is busy. */ | |
2432 | if (netif_running(dev)) | |
2433 | return -EBUSY; | |
2434 | ||
2435 | rtnl_lock(); | |
2436 | ||
2437 | prev_offload = macsec->offload; | |
2438 | macsec->offload = offload; | |
2439 | ||
2440 | /* Check if the device already has rules configured: we do not support | |
2441 | * rules migration. | |
2442 | */ | |
2443 | if (macsec_is_configured(macsec)) { | |
2444 | ret = -EBUSY; | |
2445 | goto rollback; | |
2446 | } | |
2447 | ||
2448 | ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload, | |
2449 | macsec, &ctx); | |
2450 | if (!ops) { | |
2451 | ret = -EOPNOTSUPP; | |
2452 | goto rollback; | |
2453 | } | |
2454 | ||
2455 | if (prev_offload == MACSEC_OFFLOAD_OFF) | |
2456 | func = ops->mdo_add_secy; | |
2457 | else | |
2458 | func = ops->mdo_del_secy; | |
2459 | ||
2460 | ctx.secy = &macsec->secy; | |
2461 | ret = macsec_offload(func, &ctx); | |
2462 | if (ret) | |
2463 | goto rollback; | |
2464 | ||
2465 | rtnl_unlock(); | |
2466 | return 0; | |
2467 | ||
2468 | rollback: | |
2469 | macsec->offload = prev_offload; | |
2470 | ||
2471 | rtnl_unlock(); | |
2472 | return ret; | |
2473 | } | |
2474 | ||
c09440f7 | 2475 | static int copy_tx_sa_stats(struct sk_buff *skb, |
7979472b | 2476 | struct macsec_tx_sa_stats __percpu *pstats) |
c09440f7 SD |
2477 | { |
2478 | struct macsec_tx_sa_stats sum = {0, }; | |
2479 | int cpu; | |
2480 | ||
2481 | for_each_possible_cpu(cpu) { | |
2482 | const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu); | |
2483 | ||
2484 | sum.OutPktsProtected += stats->OutPktsProtected; | |
2485 | sum.OutPktsEncrypted += stats->OutPktsEncrypted; | |
2486 | } | |
2487 | ||
2488 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) || | |
2489 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted)) | |
2490 | return -EMSGSIZE; | |
2491 | ||
2492 | return 0; | |
2493 | } | |
2494 | ||
e1427237 FW |
2495 | static noinline_for_stack int |
2496 | copy_rx_sa_stats(struct sk_buff *skb, | |
2497 | struct macsec_rx_sa_stats __percpu *pstats) | |
c09440f7 SD |
2498 | { |
2499 | struct macsec_rx_sa_stats sum = {0, }; | |
2500 | int cpu; | |
2501 | ||
2502 | for_each_possible_cpu(cpu) { | |
2503 | const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu); | |
2504 | ||
2505 | sum.InPktsOK += stats->InPktsOK; | |
2506 | sum.InPktsInvalid += stats->InPktsInvalid; | |
2507 | sum.InPktsNotValid += stats->InPktsNotValid; | |
2508 | sum.InPktsNotUsingSA += stats->InPktsNotUsingSA; | |
2509 | sum.InPktsUnusedSA += stats->InPktsUnusedSA; | |
2510 | } | |
2511 | ||
2512 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) || | |
2513 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) || | |
2514 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) || | |
2515 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) || | |
2516 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA)) | |
2517 | return -EMSGSIZE; | |
2518 | ||
2519 | return 0; | |
2520 | } | |
2521 | ||
e1427237 FW |
2522 | static noinline_for_stack int |
2523 | copy_rx_sc_stats(struct sk_buff *skb, struct pcpu_rx_sc_stats __percpu *pstats) | |
c09440f7 SD |
2524 | { |
2525 | struct macsec_rx_sc_stats sum = {0, }; | |
2526 | int cpu; | |
2527 | ||
2528 | for_each_possible_cpu(cpu) { | |
2529 | const struct pcpu_rx_sc_stats *stats; | |
2530 | struct macsec_rx_sc_stats tmp; | |
2531 | unsigned int start; | |
2532 | ||
2533 | stats = per_cpu_ptr(pstats, cpu); | |
2534 | do { | |
2535 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2536 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2537 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2538 | ||
2539 | sum.InOctetsValidated += tmp.InOctetsValidated; | |
2540 | sum.InOctetsDecrypted += tmp.InOctetsDecrypted; | |
2541 | sum.InPktsUnchecked += tmp.InPktsUnchecked; | |
2542 | sum.InPktsDelayed += tmp.InPktsDelayed; | |
2543 | sum.InPktsOK += tmp.InPktsOK; | |
2544 | sum.InPktsInvalid += tmp.InPktsInvalid; | |
2545 | sum.InPktsLate += tmp.InPktsLate; | |
2546 | sum.InPktsNotValid += tmp.InPktsNotValid; | |
2547 | sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA; | |
2548 | sum.InPktsUnusedSA += tmp.InPktsUnusedSA; | |
2549 | } | |
2550 | ||
f60d94c0 ND |
2551 | if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
2552 | sum.InOctetsValidated, | |
2553 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2554 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, | |
2555 | sum.InOctetsDecrypted, | |
2556 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2557 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, | |
2558 | sum.InPktsUnchecked, | |
2559 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2560 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, | |
2561 | sum.InPktsDelayed, | |
2562 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2563 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, | |
2564 | sum.InPktsOK, | |
2565 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2566 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, | |
2567 | sum.InPktsInvalid, | |
2568 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2569 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, | |
2570 | sum.InPktsLate, | |
2571 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2572 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, | |
2573 | sum.InPktsNotValid, | |
2574 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2575 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
2576 | sum.InPktsNotUsingSA, | |
2577 | MACSEC_RXSC_STATS_ATTR_PAD) || | |
2578 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
2579 | sum.InPktsUnusedSA, | |
2580 | MACSEC_RXSC_STATS_ATTR_PAD)) | |
c09440f7 SD |
2581 | return -EMSGSIZE; |
2582 | ||
2583 | return 0; | |
2584 | } | |
2585 | ||
e1427237 FW |
2586 | static noinline_for_stack int |
2587 | copy_tx_sc_stats(struct sk_buff *skb, struct pcpu_tx_sc_stats __percpu *pstats) | |
c09440f7 SD |
2588 | { |
2589 | struct macsec_tx_sc_stats sum = {0, }; | |
2590 | int cpu; | |
2591 | ||
2592 | for_each_possible_cpu(cpu) { | |
2593 | const struct pcpu_tx_sc_stats *stats; | |
2594 | struct macsec_tx_sc_stats tmp; | |
2595 | unsigned int start; | |
2596 | ||
2597 | stats = per_cpu_ptr(pstats, cpu); | |
2598 | do { | |
2599 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2600 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2601 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2602 | ||
2603 | sum.OutPktsProtected += tmp.OutPktsProtected; | |
2604 | sum.OutPktsEncrypted += tmp.OutPktsEncrypted; | |
2605 | sum.OutOctetsProtected += tmp.OutOctetsProtected; | |
2606 | sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted; | |
2607 | } | |
2608 | ||
f60d94c0 ND |
2609 | if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
2610 | sum.OutPktsProtected, | |
2611 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2612 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
2613 | sum.OutPktsEncrypted, | |
2614 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2615 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, | |
2616 | sum.OutOctetsProtected, | |
2617 | MACSEC_TXSC_STATS_ATTR_PAD) || | |
2618 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, | |
2619 | sum.OutOctetsEncrypted, | |
2620 | MACSEC_TXSC_STATS_ATTR_PAD)) | |
c09440f7 SD |
2621 | return -EMSGSIZE; |
2622 | ||
2623 | return 0; | |
2624 | } | |
2625 | ||
e1427237 FW |
2626 | static noinline_for_stack int |
2627 | copy_secy_stats(struct sk_buff *skb, struct pcpu_secy_stats __percpu *pstats) | |
c09440f7 SD |
2628 | { |
2629 | struct macsec_dev_stats sum = {0, }; | |
2630 | int cpu; | |
2631 | ||
2632 | for_each_possible_cpu(cpu) { | |
2633 | const struct pcpu_secy_stats *stats; | |
2634 | struct macsec_dev_stats tmp; | |
2635 | unsigned int start; | |
2636 | ||
2637 | stats = per_cpu_ptr(pstats, cpu); | |
2638 | do { | |
2639 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2640 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2641 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2642 | ||
2643 | sum.OutPktsUntagged += tmp.OutPktsUntagged; | |
2644 | sum.InPktsUntagged += tmp.InPktsUntagged; | |
2645 | sum.OutPktsTooLong += tmp.OutPktsTooLong; | |
2646 | sum.InPktsNoTag += tmp.InPktsNoTag; | |
2647 | sum.InPktsBadTag += tmp.InPktsBadTag; | |
2648 | sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI; | |
2649 | sum.InPktsNoSCI += tmp.InPktsNoSCI; | |
2650 | sum.InPktsOverrun += tmp.InPktsOverrun; | |
2651 | } | |
2652 | ||
f60d94c0 ND |
2653 | if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
2654 | sum.OutPktsUntagged, | |
2655 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2656 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, | |
2657 | sum.InPktsUntagged, | |
2658 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2659 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, | |
2660 | sum.OutPktsTooLong, | |
2661 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2662 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, | |
2663 | sum.InPktsNoTag, | |
2664 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2665 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, | |
2666 | sum.InPktsBadTag, | |
2667 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2668 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, | |
2669 | sum.InPktsUnknownSCI, | |
2670 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2671 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, | |
2672 | sum.InPktsNoSCI, | |
2673 | MACSEC_SECY_STATS_ATTR_PAD) || | |
2674 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, | |
2675 | sum.InPktsOverrun, | |
2676 | MACSEC_SECY_STATS_ATTR_PAD)) | |
c09440f7 SD |
2677 | return -EMSGSIZE; |
2678 | ||
2679 | return 0; | |
2680 | } | |
2681 | ||
2682 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) | |
2683 | { | |
2684 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ae0be8de MK |
2685 | struct nlattr *secy_nest = nla_nest_start_noflag(skb, |
2686 | MACSEC_ATTR_SECY); | |
ccfdec90 | 2687 | u64 csid; |
c09440f7 SD |
2688 | |
2689 | if (!secy_nest) | |
2690 | return 1; | |
2691 | ||
ccfdec90 FW |
2692 | switch (secy->key_len) { |
2693 | case MACSEC_GCM_AES_128_SAK_LEN: | |
e8660ded | 2694 | csid = MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
2695 | break; |
2696 | case MACSEC_GCM_AES_256_SAK_LEN: | |
2697 | csid = MACSEC_CIPHER_ID_GCM_AES_256; | |
2698 | break; | |
2699 | default: | |
2700 | goto cancel; | |
2701 | } | |
2702 | ||
f60d94c0 ND |
2703 | if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
2704 | MACSEC_SECY_ATTR_PAD) || | |
2705 | nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, | |
ccfdec90 | 2706 | csid, MACSEC_SECY_ATTR_PAD) || |
c09440f7 SD |
2707 | nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
2708 | nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || | |
2709 | nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || | |
2710 | nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || | |
2711 | nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || | |
2712 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || | |
2713 | nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || | |
2714 | nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || | |
2715 | nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || | |
2716 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) | |
2717 | goto cancel; | |
2718 | ||
2719 | if (secy->replay_protect) { | |
2720 | if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) | |
2721 | goto cancel; | |
2722 | } | |
2723 | ||
2724 | nla_nest_end(skb, secy_nest); | |
2725 | return 0; | |
2726 | ||
2727 | cancel: | |
2728 | nla_nest_cancel(skb, secy_nest); | |
2729 | return 1; | |
2730 | } | |
2731 | ||
e1427237 FW |
2732 | static noinline_for_stack int |
2733 | dump_secy(struct macsec_secy *secy, struct net_device *dev, | |
2734 | struct sk_buff *skb, struct netlink_callback *cb) | |
c09440f7 | 2735 | { |
dcb780fb | 2736 | struct macsec_dev *macsec = netdev_priv(dev); |
c09440f7 SD |
2737 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
2738 | struct nlattr *txsa_list, *rxsc_list; | |
dcb780fb | 2739 | struct macsec_rx_sc *rx_sc; |
c09440f7 | 2740 | struct nlattr *attr; |
dcb780fb AT |
2741 | void *hdr; |
2742 | int i, j; | |
c09440f7 SD |
2743 | |
2744 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2745 | &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); | |
2746 | if (!hdr) | |
2747 | return -EMSGSIZE; | |
2748 | ||
0a833c29 | 2749 | genl_dump_check_consistent(cb, hdr); |
c09440f7 SD |
2750 | |
2751 | if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) | |
2752 | goto nla_put_failure; | |
2753 | ||
dcb780fb AT |
2754 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD); |
2755 | if (!attr) | |
2756 | goto nla_put_failure; | |
2757 | if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload)) | |
2758 | goto nla_put_failure; | |
2759 | nla_nest_end(skb, attr); | |
2760 | ||
c09440f7 SD |
2761 | if (nla_put_secy(secy, skb)) |
2762 | goto nla_put_failure; | |
2763 | ||
ae0be8de | 2764 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS); |
c09440f7 SD |
2765 | if (!attr) |
2766 | goto nla_put_failure; | |
2767 | if (copy_tx_sc_stats(skb, tx_sc->stats)) { | |
2768 | nla_nest_cancel(skb, attr); | |
2769 | goto nla_put_failure; | |
2770 | } | |
2771 | nla_nest_end(skb, attr); | |
2772 | ||
ae0be8de | 2773 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS); |
c09440f7 SD |
2774 | if (!attr) |
2775 | goto nla_put_failure; | |
2776 | if (copy_secy_stats(skb, macsec_priv(dev)->stats)) { | |
2777 | nla_nest_cancel(skb, attr); | |
2778 | goto nla_put_failure; | |
2779 | } | |
2780 | nla_nest_end(skb, attr); | |
2781 | ||
ae0be8de | 2782 | txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST); |
c09440f7 SD |
2783 | if (!txsa_list) |
2784 | goto nla_put_failure; | |
2785 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { | |
2786 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); | |
2787 | struct nlattr *txsa_nest; | |
2788 | ||
2789 | if (!tx_sa) | |
2790 | continue; | |
2791 | ||
ae0be8de | 2792 | txsa_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
2793 | if (!txsa_nest) { |
2794 | nla_nest_cancel(skb, txsa_list); | |
2795 | goto nla_put_failure; | |
2796 | } | |
2797 | ||
2798 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || | |
2799 | nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) || | |
8acca6ac | 2800 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
c09440f7 SD |
2801 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
2802 | nla_nest_cancel(skb, txsa_nest); | |
2803 | nla_nest_cancel(skb, txsa_list); | |
2804 | goto nla_put_failure; | |
2805 | } | |
2806 | ||
ae0be8de | 2807 | attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS); |
c09440f7 SD |
2808 | if (!attr) { |
2809 | nla_nest_cancel(skb, txsa_nest); | |
2810 | nla_nest_cancel(skb, txsa_list); | |
2811 | goto nla_put_failure; | |
2812 | } | |
2813 | if (copy_tx_sa_stats(skb, tx_sa->stats)) { | |
2814 | nla_nest_cancel(skb, attr); | |
2815 | nla_nest_cancel(skb, txsa_nest); | |
2816 | nla_nest_cancel(skb, txsa_list); | |
2817 | goto nla_put_failure; | |
2818 | } | |
2819 | nla_nest_end(skb, attr); | |
2820 | ||
2821 | nla_nest_end(skb, txsa_nest); | |
2822 | } | |
2823 | nla_nest_end(skb, txsa_list); | |
2824 | ||
ae0be8de | 2825 | rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST); |
c09440f7 SD |
2826 | if (!rxsc_list) |
2827 | goto nla_put_failure; | |
2828 | ||
2829 | j = 1; | |
2830 | for_each_rxsc_rtnl(secy, rx_sc) { | |
2831 | int k; | |
2832 | struct nlattr *rxsa_list; | |
ae0be8de | 2833 | struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
2834 | |
2835 | if (!rxsc_nest) { | |
2836 | nla_nest_cancel(skb, rxsc_list); | |
2837 | goto nla_put_failure; | |
2838 | } | |
2839 | ||
2840 | if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || | |
f60d94c0 ND |
2841 | nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
2842 | MACSEC_RXSC_ATTR_PAD)) { | |
c09440f7 SD |
2843 | nla_nest_cancel(skb, rxsc_nest); |
2844 | nla_nest_cancel(skb, rxsc_list); | |
2845 | goto nla_put_failure; | |
2846 | } | |
2847 | ||
ae0be8de | 2848 | attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS); |
c09440f7 SD |
2849 | if (!attr) { |
2850 | nla_nest_cancel(skb, rxsc_nest); | |
2851 | nla_nest_cancel(skb, rxsc_list); | |
2852 | goto nla_put_failure; | |
2853 | } | |
2854 | if (copy_rx_sc_stats(skb, rx_sc->stats)) { | |
2855 | nla_nest_cancel(skb, attr); | |
2856 | nla_nest_cancel(skb, rxsc_nest); | |
2857 | nla_nest_cancel(skb, rxsc_list); | |
2858 | goto nla_put_failure; | |
2859 | } | |
2860 | nla_nest_end(skb, attr); | |
2861 | ||
ae0be8de MK |
2862 | rxsa_list = nla_nest_start_noflag(skb, |
2863 | MACSEC_RXSC_ATTR_SA_LIST); | |
c09440f7 SD |
2864 | if (!rxsa_list) { |
2865 | nla_nest_cancel(skb, rxsc_nest); | |
2866 | nla_nest_cancel(skb, rxsc_list); | |
2867 | goto nla_put_failure; | |
2868 | } | |
2869 | ||
2870 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { | |
2871 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); | |
2872 | struct nlattr *rxsa_nest; | |
2873 | ||
2874 | if (!rx_sa) | |
2875 | continue; | |
2876 | ||
ae0be8de | 2877 | rxsa_nest = nla_nest_start_noflag(skb, k++); |
c09440f7 SD |
2878 | if (!rxsa_nest) { |
2879 | nla_nest_cancel(skb, rxsa_list); | |
2880 | nla_nest_cancel(skb, rxsc_nest); | |
2881 | nla_nest_cancel(skb, rxsc_list); | |
2882 | goto nla_put_failure; | |
2883 | } | |
2884 | ||
ae0be8de MK |
2885 | attr = nla_nest_start_noflag(skb, |
2886 | MACSEC_SA_ATTR_STATS); | |
c09440f7 SD |
2887 | if (!attr) { |
2888 | nla_nest_cancel(skb, rxsa_list); | |
2889 | nla_nest_cancel(skb, rxsc_nest); | |
2890 | nla_nest_cancel(skb, rxsc_list); | |
2891 | goto nla_put_failure; | |
2892 | } | |
2893 | if (copy_rx_sa_stats(skb, rx_sa->stats)) { | |
2894 | nla_nest_cancel(skb, attr); | |
2895 | nla_nest_cancel(skb, rxsa_list); | |
2896 | nla_nest_cancel(skb, rxsc_nest); | |
2897 | nla_nest_cancel(skb, rxsc_list); | |
2898 | goto nla_put_failure; | |
2899 | } | |
2900 | nla_nest_end(skb, attr); | |
2901 | ||
2902 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || | |
2903 | nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) || | |
8acca6ac | 2904 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
c09440f7 SD |
2905 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
2906 | nla_nest_cancel(skb, rxsa_nest); | |
2907 | nla_nest_cancel(skb, rxsc_nest); | |
2908 | nla_nest_cancel(skb, rxsc_list); | |
2909 | goto nla_put_failure; | |
2910 | } | |
2911 | nla_nest_end(skb, rxsa_nest); | |
2912 | } | |
2913 | ||
2914 | nla_nest_end(skb, rxsa_list); | |
2915 | nla_nest_end(skb, rxsc_nest); | |
2916 | } | |
2917 | ||
2918 | nla_nest_end(skb, rxsc_list); | |
2919 | ||
c09440f7 SD |
2920 | genlmsg_end(skb, hdr); |
2921 | ||
2922 | return 0; | |
2923 | ||
2924 | nla_put_failure: | |
c09440f7 SD |
2925 | genlmsg_cancel(skb, hdr); |
2926 | return -EMSGSIZE; | |
2927 | } | |
2928 | ||
96cfc505 SD |
2929 | static int macsec_generation = 1; /* protected by RTNL */ |
2930 | ||
c09440f7 SD |
2931 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
2932 | { | |
2933 | struct net *net = sock_net(skb->sk); | |
2934 | struct net_device *dev; | |
2935 | int dev_idx, d; | |
2936 | ||
2937 | dev_idx = cb->args[0]; | |
2938 | ||
2939 | d = 0; | |
c10c63ea | 2940 | rtnl_lock(); |
96cfc505 SD |
2941 | |
2942 | cb->seq = macsec_generation; | |
2943 | ||
c09440f7 SD |
2944 | for_each_netdev(net, dev) { |
2945 | struct macsec_secy *secy; | |
2946 | ||
2947 | if (d < dev_idx) | |
2948 | goto next; | |
2949 | ||
2950 | if (!netif_is_macsec(dev)) | |
2951 | goto next; | |
2952 | ||
2953 | secy = &macsec_priv(dev)->secy; | |
2954 | if (dump_secy(secy, dev, skb, cb) < 0) | |
2955 | goto done; | |
2956 | next: | |
2957 | d++; | |
2958 | } | |
2959 | ||
2960 | done: | |
c10c63ea | 2961 | rtnl_unlock(); |
c09440f7 SD |
2962 | cb->args[0] = d; |
2963 | return skb->len; | |
2964 | } | |
2965 | ||
2966 | static const struct genl_ops macsec_genl_ops[] = { | |
2967 | { | |
2968 | .cmd = MACSEC_CMD_GET_TXSC, | |
ef6243ac | 2969 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 2970 | .dumpit = macsec_dump_txsc, |
c09440f7 SD |
2971 | }, |
2972 | { | |
2973 | .cmd = MACSEC_CMD_ADD_RXSC, | |
ef6243ac | 2974 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 2975 | .doit = macsec_add_rxsc, |
c09440f7 SD |
2976 | .flags = GENL_ADMIN_PERM, |
2977 | }, | |
2978 | { | |
2979 | .cmd = MACSEC_CMD_DEL_RXSC, | |
ef6243ac | 2980 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 2981 | .doit = macsec_del_rxsc, |
c09440f7 SD |
2982 | .flags = GENL_ADMIN_PERM, |
2983 | }, | |
2984 | { | |
2985 | .cmd = MACSEC_CMD_UPD_RXSC, | |
ef6243ac | 2986 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 2987 | .doit = macsec_upd_rxsc, |
c09440f7 SD |
2988 | .flags = GENL_ADMIN_PERM, |
2989 | }, | |
2990 | { | |
2991 | .cmd = MACSEC_CMD_ADD_TXSA, | |
ef6243ac | 2992 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 2993 | .doit = macsec_add_txsa, |
c09440f7 SD |
2994 | .flags = GENL_ADMIN_PERM, |
2995 | }, | |
2996 | { | |
2997 | .cmd = MACSEC_CMD_DEL_TXSA, | |
ef6243ac | 2998 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 2999 | .doit = macsec_del_txsa, |
c09440f7 SD |
3000 | .flags = GENL_ADMIN_PERM, |
3001 | }, | |
3002 | { | |
3003 | .cmd = MACSEC_CMD_UPD_TXSA, | |
ef6243ac | 3004 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3005 | .doit = macsec_upd_txsa, |
c09440f7 SD |
3006 | .flags = GENL_ADMIN_PERM, |
3007 | }, | |
3008 | { | |
3009 | .cmd = MACSEC_CMD_ADD_RXSA, | |
ef6243ac | 3010 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3011 | .doit = macsec_add_rxsa, |
c09440f7 SD |
3012 | .flags = GENL_ADMIN_PERM, |
3013 | }, | |
3014 | { | |
3015 | .cmd = MACSEC_CMD_DEL_RXSA, | |
ef6243ac | 3016 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3017 | .doit = macsec_del_rxsa, |
c09440f7 SD |
3018 | .flags = GENL_ADMIN_PERM, |
3019 | }, | |
3020 | { | |
3021 | .cmd = MACSEC_CMD_UPD_RXSA, | |
ef6243ac | 3022 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3023 | .doit = macsec_upd_rxsa, |
c09440f7 SD |
3024 | .flags = GENL_ADMIN_PERM, |
3025 | }, | |
dcb780fb AT |
3026 | { |
3027 | .cmd = MACSEC_CMD_UPD_OFFLOAD, | |
3028 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
3029 | .doit = macsec_upd_offload, | |
3030 | .flags = GENL_ADMIN_PERM, | |
3031 | }, | |
c09440f7 SD |
3032 | }; |
3033 | ||
56989f6d | 3034 | static struct genl_family macsec_fam __ro_after_init = { |
489111e5 JB |
3035 | .name = MACSEC_GENL_NAME, |
3036 | .hdrsize = 0, | |
3037 | .version = MACSEC_GENL_VERSION, | |
3038 | .maxattr = MACSEC_ATTR_MAX, | |
3b0f31f2 | 3039 | .policy = macsec_genl_policy, |
489111e5 JB |
3040 | .netnsok = true, |
3041 | .module = THIS_MODULE, | |
3042 | .ops = macsec_genl_ops, | |
3043 | .n_ops = ARRAY_SIZE(macsec_genl_ops), | |
3044 | }; | |
3045 | ||
c09440f7 SD |
3046 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
3047 | struct net_device *dev) | |
3048 | { | |
3049 | struct macsec_dev *macsec = netdev_priv(dev); | |
3050 | struct macsec_secy *secy = &macsec->secy; | |
3051 | struct pcpu_secy_stats *secy_stats; | |
3052 | int ret, len; | |
3053 | ||
3cf3227a AT |
3054 | if (macsec_is_offloaded(netdev_priv(dev))) { |
3055 | skb->dev = macsec->real_dev; | |
3056 | return dev_queue_xmit(skb); | |
3057 | } | |
3058 | ||
c09440f7 SD |
3059 | /* 10.5 */ |
3060 | if (!secy->protect_frames) { | |
3061 | secy_stats = this_cpu_ptr(macsec->stats); | |
3062 | u64_stats_update_begin(&secy_stats->syncp); | |
3063 | secy_stats->stats.OutPktsUntagged++; | |
3064 | u64_stats_update_end(&secy_stats->syncp); | |
79c62220 | 3065 | skb->dev = macsec->real_dev; |
c09440f7 SD |
3066 | len = skb->len; |
3067 | ret = dev_queue_xmit(skb); | |
3068 | count_tx(dev, ret, len); | |
3069 | return ret; | |
3070 | } | |
3071 | ||
3072 | if (!secy->operational) { | |
3073 | kfree_skb(skb); | |
3074 | dev->stats.tx_dropped++; | |
3075 | return NETDEV_TX_OK; | |
3076 | } | |
3077 | ||
3078 | skb = macsec_encrypt(skb, dev); | |
3079 | if (IS_ERR(skb)) { | |
3080 | if (PTR_ERR(skb) != -EINPROGRESS) | |
3081 | dev->stats.tx_dropped++; | |
3082 | return NETDEV_TX_OK; | |
3083 | } | |
3084 | ||
3085 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
3086 | ||
3087 | macsec_encrypt_finish(skb, dev); | |
3088 | len = skb->len; | |
3089 | ret = dev_queue_xmit(skb); | |
3090 | count_tx(dev, ret, len); | |
3091 | return ret; | |
3092 | } | |
3093 | ||
3094 | #define MACSEC_FEATURES \ | |
3095 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) | |
e2003872 | 3096 | |
c09440f7 SD |
3097 | static int macsec_dev_init(struct net_device *dev) |
3098 | { | |
3099 | struct macsec_dev *macsec = macsec_priv(dev); | |
3100 | struct net_device *real_dev = macsec->real_dev; | |
5491e7c6 | 3101 | int err; |
c09440f7 SD |
3102 | |
3103 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
3104 | if (!dev->tstats) | |
3105 | return -ENOMEM; | |
3106 | ||
5491e7c6 PA |
3107 | err = gro_cells_init(&macsec->gro_cells, dev); |
3108 | if (err) { | |
3109 | free_percpu(dev->tstats); | |
3110 | return err; | |
3111 | } | |
3112 | ||
c09440f7 SD |
3113 | dev->features = real_dev->features & MACSEC_FEATURES; |
3114 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
3115 | ||
3116 | dev->needed_headroom = real_dev->needed_headroom + | |
3117 | MACSEC_NEEDED_HEADROOM; | |
3118 | dev->needed_tailroom = real_dev->needed_tailroom + | |
3119 | MACSEC_NEEDED_TAILROOM; | |
3120 | ||
3121 | if (is_zero_ether_addr(dev->dev_addr)) | |
3122 | eth_hw_addr_inherit(dev, real_dev); | |
3123 | if (is_zero_ether_addr(dev->broadcast)) | |
3124 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
3125 | ||
3126 | return 0; | |
3127 | } | |
3128 | ||
3129 | static void macsec_dev_uninit(struct net_device *dev) | |
3130 | { | |
5491e7c6 PA |
3131 | struct macsec_dev *macsec = macsec_priv(dev); |
3132 | ||
3133 | gro_cells_destroy(&macsec->gro_cells); | |
c09440f7 SD |
3134 | free_percpu(dev->tstats); |
3135 | } | |
3136 | ||
3137 | static netdev_features_t macsec_fix_features(struct net_device *dev, | |
3138 | netdev_features_t features) | |
3139 | { | |
3140 | struct macsec_dev *macsec = macsec_priv(dev); | |
3141 | struct net_device *real_dev = macsec->real_dev; | |
3142 | ||
5491e7c6 PA |
3143 | features &= (real_dev->features & MACSEC_FEATURES) | |
3144 | NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; | |
3145 | features |= NETIF_F_LLTX; | |
c09440f7 SD |
3146 | |
3147 | return features; | |
3148 | } | |
3149 | ||
3150 | static int macsec_dev_open(struct net_device *dev) | |
3151 | { | |
3152 | struct macsec_dev *macsec = macsec_priv(dev); | |
3153 | struct net_device *real_dev = macsec->real_dev; | |
3154 | int err; | |
3155 | ||
c09440f7 SD |
3156 | err = dev_uc_add(real_dev, dev->dev_addr); |
3157 | if (err < 0) | |
3158 | return err; | |
3159 | ||
3160 | if (dev->flags & IFF_ALLMULTI) { | |
3161 | err = dev_set_allmulti(real_dev, 1); | |
3162 | if (err < 0) | |
3163 | goto del_unicast; | |
3164 | } | |
3165 | ||
3166 | if (dev->flags & IFF_PROMISC) { | |
3167 | err = dev_set_promiscuity(real_dev, 1); | |
3168 | if (err < 0) | |
3169 | goto clear_allmulti; | |
3170 | } | |
3171 | ||
3cf3227a AT |
3172 | /* If h/w offloading is available, propagate to the device */ |
3173 | if (macsec_is_offloaded(macsec)) { | |
3174 | const struct macsec_ops *ops; | |
3175 | struct macsec_context ctx; | |
3176 | ||
3177 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3178 | if (!ops) { | |
3179 | err = -EOPNOTSUPP; | |
3180 | goto clear_allmulti; | |
3181 | } | |
3182 | ||
3183 | err = macsec_offload(ops->mdo_dev_open, &ctx); | |
3184 | if (err) | |
3185 | goto clear_allmulti; | |
3186 | } | |
3187 | ||
c09440f7 SD |
3188 | if (netif_carrier_ok(real_dev)) |
3189 | netif_carrier_on(dev); | |
3190 | ||
3191 | return 0; | |
3192 | clear_allmulti: | |
3193 | if (dev->flags & IFF_ALLMULTI) | |
3194 | dev_set_allmulti(real_dev, -1); | |
3195 | del_unicast: | |
3196 | dev_uc_del(real_dev, dev->dev_addr); | |
3197 | netif_carrier_off(dev); | |
3198 | return err; | |
3199 | } | |
3200 | ||
3201 | static int macsec_dev_stop(struct net_device *dev) | |
3202 | { | |
3203 | struct macsec_dev *macsec = macsec_priv(dev); | |
3204 | struct net_device *real_dev = macsec->real_dev; | |
3205 | ||
3206 | netif_carrier_off(dev); | |
3207 | ||
3cf3227a AT |
3208 | /* If h/w offloading is available, propagate to the device */ |
3209 | if (macsec_is_offloaded(macsec)) { | |
3210 | const struct macsec_ops *ops; | |
3211 | struct macsec_context ctx; | |
3212 | ||
3213 | ops = macsec_get_ops(macsec, &ctx); | |
3214 | if (ops) | |
3215 | macsec_offload(ops->mdo_dev_stop, &ctx); | |
3216 | } | |
3217 | ||
c09440f7 SD |
3218 | dev_mc_unsync(real_dev, dev); |
3219 | dev_uc_unsync(real_dev, dev); | |
3220 | ||
3221 | if (dev->flags & IFF_ALLMULTI) | |
3222 | dev_set_allmulti(real_dev, -1); | |
3223 | ||
3224 | if (dev->flags & IFF_PROMISC) | |
3225 | dev_set_promiscuity(real_dev, -1); | |
3226 | ||
3227 | dev_uc_del(real_dev, dev->dev_addr); | |
3228 | ||
3229 | return 0; | |
3230 | } | |
3231 | ||
3232 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) | |
3233 | { | |
3234 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3235 | ||
3236 | if (!(dev->flags & IFF_UP)) | |
3237 | return; | |
3238 | ||
3239 | if (change & IFF_ALLMULTI) | |
3240 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3241 | ||
3242 | if (change & IFF_PROMISC) | |
3243 | dev_set_promiscuity(real_dev, | |
3244 | dev->flags & IFF_PROMISC ? 1 : -1); | |
3245 | } | |
3246 | ||
3247 | static void macsec_dev_set_rx_mode(struct net_device *dev) | |
3248 | { | |
3249 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3250 | ||
3251 | dev_mc_sync(real_dev, dev); | |
3252 | dev_uc_sync(real_dev, dev); | |
3253 | } | |
3254 | ||
3255 | static int macsec_set_mac_address(struct net_device *dev, void *p) | |
3256 | { | |
3257 | struct macsec_dev *macsec = macsec_priv(dev); | |
3258 | struct net_device *real_dev = macsec->real_dev; | |
3259 | struct sockaddr *addr = p; | |
3260 | int err; | |
3261 | ||
3262 | if (!is_valid_ether_addr(addr->sa_data)) | |
3263 | return -EADDRNOTAVAIL; | |
3264 | ||
3265 | if (!(dev->flags & IFF_UP)) | |
3266 | goto out; | |
3267 | ||
3268 | err = dev_uc_add(real_dev, addr->sa_data); | |
3269 | if (err < 0) | |
3270 | return err; | |
3271 | ||
3272 | dev_uc_del(real_dev, dev->dev_addr); | |
3273 | ||
3274 | out: | |
3275 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
6fc498bc | 3276 | macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES); |
09f4136c DB |
3277 | |
3278 | /* If h/w offloading is available, propagate to the device */ | |
3279 | if (macsec_is_offloaded(macsec)) { | |
3280 | const struct macsec_ops *ops; | |
3281 | struct macsec_context ctx; | |
3282 | ||
3283 | ops = macsec_get_ops(macsec, &ctx); | |
3284 | if (ops) { | |
3285 | ctx.secy = &macsec->secy; | |
3286 | macsec_offload(ops->mdo_upd_secy, &ctx); | |
3287 | } | |
3288 | } | |
3289 | ||
c09440f7 SD |
3290 | return 0; |
3291 | } | |
3292 | ||
3293 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) | |
3294 | { | |
3295 | struct macsec_dev *macsec = macsec_priv(dev); | |
3296 | unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); | |
3297 | ||
3298 | if (macsec->real_dev->mtu - extra < new_mtu) | |
3299 | return -ERANGE; | |
3300 | ||
3301 | dev->mtu = new_mtu; | |
3302 | ||
3303 | return 0; | |
3304 | } | |
3305 | ||
bc1f4470 | 3306 | static void macsec_get_stats64(struct net_device *dev, |
3307 | struct rtnl_link_stats64 *s) | |
c09440f7 SD |
3308 | { |
3309 | int cpu; | |
3310 | ||
3311 | if (!dev->tstats) | |
bc1f4470 | 3312 | return; |
c09440f7 SD |
3313 | |
3314 | for_each_possible_cpu(cpu) { | |
3315 | struct pcpu_sw_netstats *stats; | |
3316 | struct pcpu_sw_netstats tmp; | |
3317 | int start; | |
3318 | ||
3319 | stats = per_cpu_ptr(dev->tstats, cpu); | |
3320 | do { | |
3321 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
3322 | tmp.rx_packets = stats->rx_packets; | |
3323 | tmp.rx_bytes = stats->rx_bytes; | |
3324 | tmp.tx_packets = stats->tx_packets; | |
3325 | tmp.tx_bytes = stats->tx_bytes; | |
3326 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
3327 | ||
3328 | s->rx_packets += tmp.rx_packets; | |
3329 | s->rx_bytes += tmp.rx_bytes; | |
3330 | s->tx_packets += tmp.tx_packets; | |
3331 | s->tx_bytes += tmp.tx_bytes; | |
3332 | } | |
3333 | ||
3334 | s->rx_dropped = dev->stats.rx_dropped; | |
3335 | s->tx_dropped = dev->stats.tx_dropped; | |
c09440f7 SD |
3336 | } |
3337 | ||
3338 | static int macsec_get_iflink(const struct net_device *dev) | |
3339 | { | |
3340 | return macsec_priv(dev)->real_dev->ifindex; | |
3341 | } | |
3342 | ||
3343 | static const struct net_device_ops macsec_netdev_ops = { | |
3344 | .ndo_init = macsec_dev_init, | |
3345 | .ndo_uninit = macsec_dev_uninit, | |
3346 | .ndo_open = macsec_dev_open, | |
3347 | .ndo_stop = macsec_dev_stop, | |
3348 | .ndo_fix_features = macsec_fix_features, | |
3349 | .ndo_change_mtu = macsec_change_mtu, | |
3350 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, | |
3351 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, | |
3352 | .ndo_set_mac_address = macsec_set_mac_address, | |
3353 | .ndo_start_xmit = macsec_start_xmit, | |
3354 | .ndo_get_stats64 = macsec_get_stats64, | |
3355 | .ndo_get_iflink = macsec_get_iflink, | |
3356 | }; | |
3357 | ||
3358 | static const struct device_type macsec_type = { | |
3359 | .name = "macsec", | |
3360 | }; | |
3361 | ||
3362 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { | |
3363 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, | |
31d9a1c5 | 3364 | [IFLA_MACSEC_PORT] = { .type = NLA_U16 }, |
c09440f7 SD |
3365 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, |
3366 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, | |
3367 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, | |
3368 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, | |
3369 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, | |
3370 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, | |
3371 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, | |
3372 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, | |
3373 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, | |
3374 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, | |
3375 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, | |
3376 | }; | |
3377 | ||
3378 | static void macsec_free_netdev(struct net_device *dev) | |
3379 | { | |
3380 | struct macsec_dev *macsec = macsec_priv(dev); | |
c09440f7 SD |
3381 | |
3382 | free_percpu(macsec->stats); | |
3383 | free_percpu(macsec->secy.tx_sc.stats); | |
3384 | ||
c09440f7 SD |
3385 | } |
3386 | ||
3387 | static void macsec_setup(struct net_device *dev) | |
3388 | { | |
3389 | ether_setup(dev); | |
91572088 JW |
3390 | dev->min_mtu = 0; |
3391 | dev->max_mtu = ETH_MAX_MTU; | |
e425974f | 3392 | dev->priv_flags |= IFF_NO_QUEUE; |
c09440f7 | 3393 | dev->netdev_ops = &macsec_netdev_ops; |
cf124db5 DM |
3394 | dev->needs_free_netdev = true; |
3395 | dev->priv_destructor = macsec_free_netdev; | |
c24acf03 | 3396 | SET_NETDEV_DEVTYPE(dev, &macsec_type); |
c09440f7 SD |
3397 | |
3398 | eth_zero_addr(dev->broadcast); | |
3399 | } | |
3400 | ||
ccfdec90 FW |
3401 | static int macsec_changelink_common(struct net_device *dev, |
3402 | struct nlattr *data[]) | |
c09440f7 SD |
3403 | { |
3404 | struct macsec_secy *secy; | |
3405 | struct macsec_tx_sc *tx_sc; | |
3406 | ||
3407 | secy = &macsec_priv(dev)->secy; | |
3408 | tx_sc = &secy->tx_sc; | |
3409 | ||
3410 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3411 | struct macsec_tx_sa *tx_sa; | |
3412 | ||
3413 | tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); | |
3414 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); | |
3415 | ||
3416 | secy->operational = tx_sa && tx_sa->active; | |
3417 | } | |
3418 | ||
3419 | if (data[IFLA_MACSEC_WINDOW]) | |
3420 | secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); | |
3421 | ||
3422 | if (data[IFLA_MACSEC_ENCRYPT]) | |
3423 | tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); | |
3424 | ||
3425 | if (data[IFLA_MACSEC_PROTECT]) | |
3426 | secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); | |
3427 | ||
3428 | if (data[IFLA_MACSEC_INC_SCI]) | |
3429 | tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
3430 | ||
3431 | if (data[IFLA_MACSEC_ES]) | |
3432 | tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); | |
3433 | ||
3434 | if (data[IFLA_MACSEC_SCB]) | |
3435 | tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); | |
3436 | ||
3437 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) | |
3438 | secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); | |
3439 | ||
3440 | if (data[IFLA_MACSEC_VALIDATION]) | |
3441 | secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); | |
ccfdec90 FW |
3442 | |
3443 | if (data[IFLA_MACSEC_CIPHER_SUITE]) { | |
3444 | switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) { | |
3445 | case MACSEC_CIPHER_ID_GCM_AES_128: | |
e8660ded | 3446 | case MACSEC_DEFAULT_CIPHER_ID: |
ccfdec90 FW |
3447 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
3448 | break; | |
3449 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
3450 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
3451 | break; | |
3452 | default: | |
3453 | return -EINVAL; | |
3454 | } | |
3455 | } | |
3456 | ||
3457 | return 0; | |
c09440f7 SD |
3458 | } |
3459 | ||
3460 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
3461 | struct nlattr *data[], |
3462 | struct netlink_ext_ack *extack) | |
c09440f7 | 3463 | { |
3cf3227a AT |
3464 | struct macsec_dev *macsec = macsec_priv(dev); |
3465 | struct macsec_tx_sa tx_sc; | |
3466 | struct macsec_secy secy; | |
3467 | int ret; | |
3468 | ||
c09440f7 SD |
3469 | if (!data) |
3470 | return 0; | |
3471 | ||
3472 | if (data[IFLA_MACSEC_CIPHER_SUITE] || | |
3473 | data[IFLA_MACSEC_ICV_LEN] || | |
3474 | data[IFLA_MACSEC_SCI] || | |
3475 | data[IFLA_MACSEC_PORT]) | |
3476 | return -EINVAL; | |
3477 | ||
3cf3227a AT |
3478 | /* Keep a copy of unmodified secy and tx_sc, in case the offload |
3479 | * propagation fails, to revert macsec_changelink_common. | |
3480 | */ | |
3481 | memcpy(&secy, &macsec->secy, sizeof(secy)); | |
3482 | memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc)); | |
3483 | ||
3484 | ret = macsec_changelink_common(dev, data); | |
3485 | if (ret) | |
3486 | return ret; | |
3487 | ||
3488 | /* If h/w offloading is available, propagate to the device */ | |
3489 | if (macsec_is_offloaded(macsec)) { | |
3490 | const struct macsec_ops *ops; | |
3491 | struct macsec_context ctx; | |
3492 | int ret; | |
3493 | ||
3494 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3495 | if (!ops) { | |
3496 | ret = -EOPNOTSUPP; | |
3497 | goto cleanup; | |
3498 | } | |
3499 | ||
3500 | ctx.secy = &macsec->secy; | |
3501 | ret = macsec_offload(ops->mdo_upd_secy, &ctx); | |
3502 | if (ret) | |
3503 | goto cleanup; | |
3504 | } | |
3505 | ||
3506 | return 0; | |
3507 | ||
3508 | cleanup: | |
3509 | memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc)); | |
3510 | memcpy(&macsec->secy, &secy, sizeof(secy)); | |
3511 | ||
3512 | return ret; | |
c09440f7 SD |
3513 | } |
3514 | ||
3515 | static void macsec_del_dev(struct macsec_dev *macsec) | |
3516 | { | |
3517 | int i; | |
3518 | ||
3519 | while (macsec->secy.rx_sc) { | |
3520 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); | |
3521 | ||
3522 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); | |
3523 | free_rx_sc(rx_sc); | |
3524 | } | |
3525 | ||
3526 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
3527 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); | |
3528 | ||
3529 | if (sa) { | |
3530 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); | |
3531 | clear_tx_sa(sa); | |
3532 | } | |
3533 | } | |
3534 | } | |
3535 | ||
bbe11fab SD |
3536 | static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
3537 | { | |
3538 | struct macsec_dev *macsec = macsec_priv(dev); | |
e2003872 | 3539 | struct net_device *real_dev = macsec->real_dev; |
bbe11fab SD |
3540 | |
3541 | unregister_netdevice_queue(dev, head); | |
3542 | list_del_rcu(&macsec->secys); | |
3543 | macsec_del_dev(macsec); | |
e2003872 | 3544 | netdev_upper_dev_unlink(real_dev, dev); |
bbe11fab SD |
3545 | |
3546 | macsec_generation++; | |
3547 | } | |
3548 | ||
c09440f7 SD |
3549 | static void macsec_dellink(struct net_device *dev, struct list_head *head) |
3550 | { | |
3551 | struct macsec_dev *macsec = macsec_priv(dev); | |
3552 | struct net_device *real_dev = macsec->real_dev; | |
3553 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3554 | ||
3cf3227a AT |
3555 | /* If h/w offloading is available, propagate to the device */ |
3556 | if (macsec_is_offloaded(macsec)) { | |
3557 | const struct macsec_ops *ops; | |
3558 | struct macsec_context ctx; | |
3559 | ||
3560 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3561 | if (ops) { | |
3562 | ctx.secy = &macsec->secy; | |
3563 | macsec_offload(ops->mdo_del_secy, &ctx); | |
3564 | } | |
3565 | } | |
3566 | ||
bbe11fab | 3567 | macsec_common_dellink(dev, head); |
96cfc505 | 3568 | |
960d5848 | 3569 | if (list_empty(&rxd->secys)) { |
c09440f7 | 3570 | netdev_rx_handler_unregister(real_dev); |
960d5848 SD |
3571 | kfree(rxd); |
3572 | } | |
c09440f7 SD |
3573 | } |
3574 | ||
3575 | static int register_macsec_dev(struct net_device *real_dev, | |
3576 | struct net_device *dev) | |
3577 | { | |
3578 | struct macsec_dev *macsec = macsec_priv(dev); | |
3579 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3580 | ||
3581 | if (!rxd) { | |
3582 | int err; | |
3583 | ||
3584 | rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); | |
3585 | if (!rxd) | |
3586 | return -ENOMEM; | |
3587 | ||
3588 | INIT_LIST_HEAD(&rxd->secys); | |
3589 | ||
3590 | err = netdev_rx_handler_register(real_dev, macsec_handle_frame, | |
3591 | rxd); | |
960d5848 SD |
3592 | if (err < 0) { |
3593 | kfree(rxd); | |
c09440f7 | 3594 | return err; |
960d5848 | 3595 | } |
c09440f7 SD |
3596 | } |
3597 | ||
3598 | list_add_tail_rcu(&macsec->secys, &rxd->secys); | |
3599 | return 0; | |
3600 | } | |
3601 | ||
3602 | static bool sci_exists(struct net_device *dev, sci_t sci) | |
3603 | { | |
3604 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); | |
3605 | struct macsec_dev *macsec; | |
3606 | ||
3607 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
3608 | if (macsec->secy.sci == sci) | |
3609 | return true; | |
3610 | } | |
3611 | ||
3612 | return false; | |
3613 | } | |
3614 | ||
c09440f7 SD |
3615 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) |
3616 | { | |
3617 | struct macsec_dev *macsec = macsec_priv(dev); | |
3618 | struct macsec_secy *secy = &macsec->secy; | |
3619 | ||
3620 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); | |
3621 | if (!macsec->stats) | |
3622 | return -ENOMEM; | |
3623 | ||
3624 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); | |
3625 | if (!secy->tx_sc.stats) { | |
3626 | free_percpu(macsec->stats); | |
3627 | return -ENOMEM; | |
3628 | } | |
3629 | ||
3630 | if (sci == MACSEC_UNDEF_SCI) | |
3631 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3632 | ||
3633 | secy->netdev = dev; | |
3634 | secy->operational = true; | |
3635 | secy->key_len = DEFAULT_SAK_LEN; | |
3636 | secy->icv_len = icv_len; | |
3637 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; | |
3638 | secy->protect_frames = true; | |
3639 | secy->replay_protect = false; | |
3640 | ||
3641 | secy->sci = sci; | |
3642 | secy->tx_sc.active = true; | |
3643 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; | |
3644 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; | |
3645 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; | |
3646 | secy->tx_sc.end_station = false; | |
3647 | secy->tx_sc.scb = false; | |
3648 | ||
3649 | return 0; | |
3650 | } | |
3651 | ||
3652 | static int macsec_newlink(struct net *net, struct net_device *dev, | |
7a3f4a18 MS |
3653 | struct nlattr *tb[], struct nlattr *data[], |
3654 | struct netlink_ext_ack *extack) | |
c09440f7 SD |
3655 | { |
3656 | struct macsec_dev *macsec = macsec_priv(dev); | |
3657 | struct net_device *real_dev; | |
3658 | int err; | |
3659 | sci_t sci; | |
3660 | u8 icv_len = DEFAULT_ICV_LEN; | |
3661 | rx_handler_func_t *rx_handler; | |
3662 | ||
3663 | if (!tb[IFLA_LINK]) | |
3664 | return -EINVAL; | |
3665 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
3666 | if (!real_dev) | |
3667 | return -ENODEV; | |
3668 | ||
3669 | dev->priv_flags |= IFF_MACSEC; | |
3670 | ||
3671 | macsec->real_dev = real_dev; | |
3672 | ||
3cf3227a AT |
3673 | /* MACsec offloading is off by default */ |
3674 | macsec->offload = MACSEC_OFFLOAD_OFF; | |
3675 | ||
c09440f7 SD |
3676 | if (data && data[IFLA_MACSEC_ICV_LEN]) |
3677 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
3678 | dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true); | |
3679 | ||
3680 | rx_handler = rtnl_dereference(real_dev->rx_handler); | |
3681 | if (rx_handler && rx_handler != macsec_handle_frame) | |
3682 | return -EBUSY; | |
3683 | ||
3684 | err = register_netdevice(dev); | |
3685 | if (err < 0) | |
3686 | return err; | |
3687 | ||
42ab19ee | 3688 | err = netdev_upper_dev_link(real_dev, dev, extack); |
e2003872 | 3689 | if (err < 0) |
bd28899d | 3690 | goto unregister; |
e2003872 | 3691 | |
c09440f7 SD |
3692 | /* need to be already registered so that ->init has run and |
3693 | * the MAC addr is set | |
3694 | */ | |
3695 | if (data && data[IFLA_MACSEC_SCI]) | |
3696 | sci = nla_get_sci(data[IFLA_MACSEC_SCI]); | |
3697 | else if (data && data[IFLA_MACSEC_PORT]) | |
3698 | sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); | |
3699 | else | |
3700 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3701 | ||
3702 | if (rx_handler && sci_exists(real_dev, sci)) { | |
3703 | err = -EBUSY; | |
e2003872 | 3704 | goto unlink; |
c09440f7 SD |
3705 | } |
3706 | ||
3707 | err = macsec_add_dev(dev, sci, icv_len); | |
3708 | if (err) | |
e2003872 | 3709 | goto unlink; |
c09440f7 | 3710 | |
ccfdec90 FW |
3711 | if (data) { |
3712 | err = macsec_changelink_common(dev, data); | |
3713 | if (err) | |
3714 | goto del_dev; | |
3715 | } | |
c09440f7 SD |
3716 | |
3717 | err = register_macsec_dev(real_dev, dev); | |
3718 | if (err < 0) | |
3719 | goto del_dev; | |
3720 | ||
e6ac0758 SD |
3721 | netif_stacked_transfer_operstate(real_dev, dev); |
3722 | linkwatch_fire_event(dev); | |
3723 | ||
96cfc505 SD |
3724 | macsec_generation++; |
3725 | ||
c09440f7 SD |
3726 | return 0; |
3727 | ||
3728 | del_dev: | |
3729 | macsec_del_dev(macsec); | |
e2003872 SD |
3730 | unlink: |
3731 | netdev_upper_dev_unlink(real_dev, dev); | |
bd28899d | 3732 | unregister: |
c09440f7 SD |
3733 | unregister_netdevice(dev); |
3734 | return err; | |
3735 | } | |
3736 | ||
a8b8a889 MS |
3737 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[], |
3738 | struct netlink_ext_ack *extack) | |
c09440f7 | 3739 | { |
74816480 | 3740 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
c09440f7 SD |
3741 | u8 icv_len = DEFAULT_ICV_LEN; |
3742 | int flag; | |
3743 | bool es, scb, sci; | |
3744 | ||
3745 | if (!data) | |
3746 | return 0; | |
3747 | ||
3748 | if (data[IFLA_MACSEC_CIPHER_SUITE]) | |
3749 | csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); | |
3750 | ||
f04c392d | 3751 | if (data[IFLA_MACSEC_ICV_LEN]) { |
c09440f7 | 3752 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
f04c392d DC |
3753 | if (icv_len != DEFAULT_ICV_LEN) { |
3754 | char dummy_key[DEFAULT_SAK_LEN] = { 0 }; | |
3755 | struct crypto_aead *dummy_tfm; | |
3756 | ||
3757 | dummy_tfm = macsec_alloc_tfm(dummy_key, | |
3758 | DEFAULT_SAK_LEN, | |
3759 | icv_len); | |
3760 | if (IS_ERR(dummy_tfm)) | |
3761 | return PTR_ERR(dummy_tfm); | |
3762 | crypto_free_aead(dummy_tfm); | |
3763 | } | |
3764 | } | |
c09440f7 SD |
3765 | |
3766 | switch (csid) { | |
ccfdec90 FW |
3767 | case MACSEC_CIPHER_ID_GCM_AES_128: |
3768 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
e8660ded | 3769 | case MACSEC_DEFAULT_CIPHER_ID: |
c09440f7 | 3770 | if (icv_len < MACSEC_MIN_ICV_LEN || |
2ccbe2cb | 3771 | icv_len > MACSEC_STD_ICV_LEN) |
c09440f7 SD |
3772 | return -EINVAL; |
3773 | break; | |
3774 | default: | |
3775 | return -EINVAL; | |
3776 | } | |
3777 | ||
3778 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3779 | if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) | |
3780 | return -EINVAL; | |
3781 | } | |
3782 | ||
3783 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; | |
3784 | flag < IFLA_MACSEC_VALIDATION; | |
3785 | flag++) { | |
3786 | if (data[flag]) { | |
3787 | if (nla_get_u8(data[flag]) > 1) | |
3788 | return -EINVAL; | |
3789 | } | |
3790 | } | |
3791 | ||
3792 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; | |
3793 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; | |
3794 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; | |
3795 | ||
3796 | if ((sci && (scb || es)) || (scb && es)) | |
3797 | return -EINVAL; | |
3798 | ||
3799 | if (data[IFLA_MACSEC_VALIDATION] && | |
3800 | nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) | |
3801 | return -EINVAL; | |
3802 | ||
4b1fb935 SD |
3803 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
3804 | nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && | |
c09440f7 SD |
3805 | !data[IFLA_MACSEC_WINDOW]) |
3806 | return -EINVAL; | |
3807 | ||
3808 | return 0; | |
3809 | } | |
3810 | ||
3811 | static struct net *macsec_get_link_net(const struct net_device *dev) | |
3812 | { | |
3813 | return dev_net(macsec_priv(dev)->real_dev); | |
3814 | } | |
3815 | ||
3816 | static size_t macsec_get_size(const struct net_device *dev) | |
3817 | { | |
c9fba3ed ZS |
3818 | return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */ |
3819 | nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */ | |
3820 | nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */ | |
3821 | nla_total_size(4) + /* IFLA_MACSEC_WINDOW */ | |
3822 | nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */ | |
3823 | nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */ | |
3824 | nla_total_size(1) + /* IFLA_MACSEC_PROTECT */ | |
3825 | nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */ | |
3826 | nla_total_size(1) + /* IFLA_MACSEC_ES */ | |
3827 | nla_total_size(1) + /* IFLA_MACSEC_SCB */ | |
3828 | nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */ | |
3829 | nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */ | |
c09440f7 SD |
3830 | 0; |
3831 | } | |
3832 | ||
3833 | static int macsec_fill_info(struct sk_buff *skb, | |
3834 | const struct net_device *dev) | |
3835 | { | |
3836 | struct macsec_secy *secy = &macsec_priv(dev)->secy; | |
3837 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ccfdec90 FW |
3838 | u64 csid; |
3839 | ||
3840 | switch (secy->key_len) { | |
3841 | case MACSEC_GCM_AES_128_SAK_LEN: | |
e8660ded | 3842 | csid = MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
3843 | break; |
3844 | case MACSEC_GCM_AES_256_SAK_LEN: | |
3845 | csid = MACSEC_CIPHER_ID_GCM_AES_256; | |
3846 | break; | |
3847 | default: | |
3848 | goto nla_put_failure; | |
3849 | } | |
c09440f7 | 3850 | |
f60d94c0 ND |
3851 | if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
3852 | IFLA_MACSEC_PAD) || | |
c09440f7 | 3853 | nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
f60d94c0 | 3854 | nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
ccfdec90 | 3855 | csid, IFLA_MACSEC_PAD) || |
c09440f7 SD |
3856 | nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
3857 | nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || | |
3858 | nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || | |
3859 | nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || | |
3860 | nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || | |
3861 | nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || | |
3862 | nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || | |
3863 | nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || | |
3864 | 0) | |
3865 | goto nla_put_failure; | |
3866 | ||
3867 | if (secy->replay_protect) { | |
3868 | if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) | |
3869 | goto nla_put_failure; | |
3870 | } | |
3871 | ||
3872 | return 0; | |
3873 | ||
3874 | nla_put_failure: | |
3875 | return -EMSGSIZE; | |
3876 | } | |
3877 | ||
3878 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { | |
3879 | .kind = "macsec", | |
3880 | .priv_size = sizeof(struct macsec_dev), | |
3881 | .maxtype = IFLA_MACSEC_MAX, | |
3882 | .policy = macsec_rtnl_policy, | |
3883 | .setup = macsec_setup, | |
3884 | .validate = macsec_validate_attr, | |
3885 | .newlink = macsec_newlink, | |
3886 | .changelink = macsec_changelink, | |
3887 | .dellink = macsec_dellink, | |
3888 | .get_size = macsec_get_size, | |
3889 | .fill_info = macsec_fill_info, | |
3890 | .get_link_net = macsec_get_link_net, | |
3891 | }; | |
3892 | ||
3893 | static bool is_macsec_master(struct net_device *dev) | |
3894 | { | |
3895 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; | |
3896 | } | |
3897 | ||
3898 | static int macsec_notify(struct notifier_block *this, unsigned long event, | |
3899 | void *ptr) | |
3900 | { | |
3901 | struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); | |
3902 | LIST_HEAD(head); | |
3903 | ||
3904 | if (!is_macsec_master(real_dev)) | |
3905 | return NOTIFY_DONE; | |
3906 | ||
3907 | switch (event) { | |
e6ac0758 SD |
3908 | case NETDEV_DOWN: |
3909 | case NETDEV_UP: | |
3910 | case NETDEV_CHANGE: { | |
3911 | struct macsec_dev *m, *n; | |
3912 | struct macsec_rxh_data *rxd; | |
3913 | ||
3914 | rxd = macsec_data_rtnl(real_dev); | |
3915 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
3916 | struct net_device *dev = m->secy.netdev; | |
3917 | ||
3918 | netif_stacked_transfer_operstate(real_dev, dev); | |
3919 | } | |
3920 | break; | |
3921 | } | |
c09440f7 SD |
3922 | case NETDEV_UNREGISTER: { |
3923 | struct macsec_dev *m, *n; | |
3924 | struct macsec_rxh_data *rxd; | |
3925 | ||
3926 | rxd = macsec_data_rtnl(real_dev); | |
3927 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
bbe11fab | 3928 | macsec_common_dellink(m->secy.netdev, &head); |
c09440f7 | 3929 | } |
bbe11fab SD |
3930 | |
3931 | netdev_rx_handler_unregister(real_dev); | |
3932 | kfree(rxd); | |
3933 | ||
c09440f7 SD |
3934 | unregister_netdevice_many(&head); |
3935 | break; | |
3936 | } | |
3937 | case NETDEV_CHANGEMTU: { | |
3938 | struct macsec_dev *m; | |
3939 | struct macsec_rxh_data *rxd; | |
3940 | ||
3941 | rxd = macsec_data_rtnl(real_dev); | |
3942 | list_for_each_entry(m, &rxd->secys, secys) { | |
3943 | struct net_device *dev = m->secy.netdev; | |
3944 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + | |
3945 | macsec_extra_len(true)); | |
3946 | ||
3947 | if (dev->mtu > mtu) | |
3948 | dev_set_mtu(dev, mtu); | |
3949 | } | |
3950 | } | |
3951 | } | |
3952 | ||
3953 | return NOTIFY_OK; | |
3954 | } | |
3955 | ||
3956 | static struct notifier_block macsec_notifier = { | |
3957 | .notifier_call = macsec_notify, | |
3958 | }; | |
3959 | ||
3960 | static int __init macsec_init(void) | |
3961 | { | |
3962 | int err; | |
3963 | ||
3964 | pr_info("MACsec IEEE 802.1AE\n"); | |
3965 | err = register_netdevice_notifier(&macsec_notifier); | |
3966 | if (err) | |
3967 | return err; | |
3968 | ||
3969 | err = rtnl_link_register(&macsec_link_ops); | |
3970 | if (err) | |
3971 | goto notifier; | |
3972 | ||
489111e5 | 3973 | err = genl_register_family(&macsec_fam); |
c09440f7 SD |
3974 | if (err) |
3975 | goto rtnl; | |
3976 | ||
3977 | return 0; | |
3978 | ||
3979 | rtnl: | |
3980 | rtnl_link_unregister(&macsec_link_ops); | |
3981 | notifier: | |
3982 | unregister_netdevice_notifier(&macsec_notifier); | |
3983 | return err; | |
3984 | } | |
3985 | ||
3986 | static void __exit macsec_exit(void) | |
3987 | { | |
3988 | genl_unregister_family(&macsec_fam); | |
3989 | rtnl_link_unregister(&macsec_link_ops); | |
3990 | unregister_netdevice_notifier(&macsec_notifier); | |
b196c22a | 3991 | rcu_barrier(); |
c09440f7 SD |
3992 | } |
3993 | ||
3994 | module_init(macsec_init); | |
3995 | module_exit(macsec_exit); | |
3996 | ||
3997 | MODULE_ALIAS_RTNL_LINK("macsec"); | |
78362998 | 3998 | MODULE_ALIAS_GENL_FAMILY("macsec"); |
c09440f7 SD |
3999 | |
4000 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); | |
4001 | MODULE_LICENSE("GPL v2"); |