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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> |
a21ecf0e | 22 | #include <linux/byteorder/generic.h> |
b06d072c | 23 | #include <linux/if_arp.h> |
c09440f7 SD |
24 | |
25 | #include <uapi/linux/if_macsec.h> | |
26 | ||
c09440f7 SD |
27 | #define MACSEC_SCI_LEN 8 |
28 | ||
29 | /* SecTAG length = macsec_eth_header without the optional SCI */ | |
30 | #define MACSEC_TAG_LEN 6 | |
31 | ||
32 | struct macsec_eth_header { | |
33 | struct ethhdr eth; | |
34 | /* SecTAG */ | |
35 | u8 tci_an; | |
36 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
37 | u8 short_length:6, | |
38 | unused:2; | |
39 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
40 | u8 unused:2, | |
41 | short_length:6; | |
42 | #else | |
43 | #error "Please fix <asm/byteorder.h>" | |
44 | #endif | |
45 | __be32 packet_number; | |
46 | u8 secure_channel_id[8]; /* optional */ | |
47 | } __packed; | |
48 | ||
49 | #define MACSEC_TCI_VERSION 0x80 | |
50 | #define MACSEC_TCI_ES 0x40 /* end station */ | |
51 | #define MACSEC_TCI_SC 0x20 /* SCI present */ | |
52 | #define MACSEC_TCI_SCB 0x10 /* epon */ | |
53 | #define MACSEC_TCI_E 0x08 /* encryption */ | |
54 | #define MACSEC_TCI_C 0x04 /* changed text */ | |
55 | #define MACSEC_AN_MASK 0x03 /* association number */ | |
56 | #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C) | |
57 | ||
58 | /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */ | |
59 | #define MIN_NON_SHORT_LEN 48 | |
60 | ||
61 | #define GCM_AES_IV_LEN 12 | |
62 | #define DEFAULT_ICV_LEN 16 | |
63 | ||
7979472b | 64 | #define for_each_rxsc(secy, sc) \ |
c09440f7 | 65 | for (sc = rcu_dereference_bh(secy->rx_sc); \ |
7979472b | 66 | sc; \ |
c09440f7 SD |
67 | sc = rcu_dereference_bh(sc->next)) |
68 | #define for_each_rxsc_rtnl(secy, sc) \ | |
69 | for (sc = rtnl_dereference(secy->rx_sc); \ | |
70 | sc; \ | |
71 | sc = rtnl_dereference(sc->next)) | |
72 | ||
a21ecf0e EM |
73 | #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31))) |
74 | ||
75 | struct gcm_iv_xpn { | |
76 | union { | |
77 | u8 short_secure_channel_id[4]; | |
78 | ssci_t ssci; | |
79 | }; | |
80 | __be64 pn; | |
81 | } __packed; | |
82 | ||
c09440f7 SD |
83 | struct gcm_iv { |
84 | union { | |
85 | u8 secure_channel_id[8]; | |
86 | sci_t sci; | |
87 | }; | |
88 | __be32 pn; | |
89 | }; | |
90 | ||
c09440f7 SD |
91 | #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT |
92 | ||
c09440f7 SD |
93 | struct pcpu_secy_stats { |
94 | struct macsec_dev_stats stats; | |
95 | struct u64_stats_sync syncp; | |
96 | }; | |
97 | ||
98 | /** | |
99 | * struct macsec_dev - private data | |
100 | * @secy: SecY config | |
101 | * @real_dev: pointer to underlying netdevice | |
102 | * @stats: MACsec device stats | |
103 | * @secys: linked list of SecY's on the underlying device | |
3cf3227a | 104 | * @offload: status of offloading on the MACsec device |
c09440f7 SD |
105 | */ |
106 | struct macsec_dev { | |
107 | struct macsec_secy secy; | |
108 | struct net_device *real_dev; | |
109 | struct pcpu_secy_stats __percpu *stats; | |
110 | struct list_head secys; | |
5491e7c6 | 111 | struct gro_cells gro_cells; |
3cf3227a | 112 | enum macsec_offload offload; |
c09440f7 SD |
113 | }; |
114 | ||
115 | /** | |
116 | * struct macsec_rxh_data - rx_handler private argument | |
117 | * @secys: linked list of SecY's on this underlying device | |
118 | */ | |
119 | struct macsec_rxh_data { | |
120 | struct list_head secys; | |
121 | }; | |
122 | ||
123 | static struct macsec_dev *macsec_priv(const struct net_device *dev) | |
124 | { | |
125 | return (struct macsec_dev *)netdev_priv(dev); | |
126 | } | |
127 | ||
128 | static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) | |
129 | { | |
130 | return rcu_dereference_bh(dev->rx_handler_data); | |
131 | } | |
132 | ||
133 | static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) | |
134 | { | |
135 | return rtnl_dereference(dev->rx_handler_data); | |
136 | } | |
137 | ||
138 | struct macsec_cb { | |
139 | struct aead_request *req; | |
140 | union { | |
141 | struct macsec_tx_sa *tx_sa; | |
142 | struct macsec_rx_sa *rx_sa; | |
143 | }; | |
144 | u8 assoc_num; | |
145 | bool valid; | |
146 | bool has_sci; | |
147 | }; | |
148 | ||
149 | static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) | |
150 | { | |
151 | struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); | |
152 | ||
153 | if (!sa || !sa->active) | |
154 | return NULL; | |
155 | ||
e187246f | 156 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
157 | return NULL; |
158 | ||
159 | return sa; | |
160 | } | |
161 | ||
162 | static void free_rx_sc_rcu(struct rcu_head *head) | |
163 | { | |
164 | struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); | |
165 | ||
166 | free_percpu(rx_sc->stats); | |
167 | kfree(rx_sc); | |
168 | } | |
169 | ||
170 | static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) | |
171 | { | |
8676d76f | 172 | return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL; |
c09440f7 SD |
173 | } |
174 | ||
175 | static void macsec_rxsc_put(struct macsec_rx_sc *sc) | |
176 | { | |
8676d76f | 177 | if (refcount_dec_and_test(&sc->refcnt)) |
c09440f7 SD |
178 | call_rcu(&sc->rcu_head, free_rx_sc_rcu); |
179 | } | |
180 | ||
181 | static void free_rxsa(struct rcu_head *head) | |
182 | { | |
183 | struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); | |
184 | ||
185 | crypto_free_aead(sa->key.tfm); | |
186 | free_percpu(sa->stats); | |
c09440f7 SD |
187 | kfree(sa); |
188 | } | |
189 | ||
190 | static void macsec_rxsa_put(struct macsec_rx_sa *sa) | |
191 | { | |
e187246f | 192 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
193 | call_rcu(&sa->rcu, free_rxsa); |
194 | } | |
195 | ||
196 | static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) | |
197 | { | |
198 | struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); | |
199 | ||
200 | if (!sa || !sa->active) | |
201 | return NULL; | |
202 | ||
28206cdb | 203 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
204 | return NULL; |
205 | ||
206 | return sa; | |
207 | } | |
208 | ||
209 | static void free_txsa(struct rcu_head *head) | |
210 | { | |
211 | struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); | |
212 | ||
213 | crypto_free_aead(sa->key.tfm); | |
214 | free_percpu(sa->stats); | |
215 | kfree(sa); | |
216 | } | |
217 | ||
218 | static void macsec_txsa_put(struct macsec_tx_sa *sa) | |
219 | { | |
28206cdb | 220 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
221 | call_rcu(&sa->rcu, free_txsa); |
222 | } | |
223 | ||
224 | static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) | |
225 | { | |
226 | BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); | |
227 | return (struct macsec_cb *)skb->cb; | |
228 | } | |
229 | ||
230 | #define MACSEC_PORT_ES (htons(0x0001)) | |
231 | #define MACSEC_PORT_SCB (0x0000) | |
232 | #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) | |
48ef50fa | 233 | #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff) |
c09440f7 | 234 | |
ccfdec90 FW |
235 | #define MACSEC_GCM_AES_128_SAK_LEN 16 |
236 | #define MACSEC_GCM_AES_256_SAK_LEN 32 | |
237 | ||
ccfdec90 | 238 | #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN |
48ef50fa | 239 | #define DEFAULT_XPN false |
c09440f7 SD |
240 | #define DEFAULT_SEND_SCI true |
241 | #define DEFAULT_ENCRYPT false | |
242 | #define DEFAULT_ENCODING_SA 0 | |
243 | ||
e0f841f5 TB |
244 | static bool send_sci(const struct macsec_secy *secy) |
245 | { | |
246 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
247 | ||
248 | return tx_sc->send_sci || | |
249 | (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb); | |
250 | } | |
251 | ||
c09440f7 SD |
252 | static sci_t make_sci(u8 *addr, __be16 port) |
253 | { | |
254 | sci_t sci; | |
255 | ||
256 | memcpy(&sci, addr, ETH_ALEN); | |
257 | memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port)); | |
258 | ||
259 | return sci; | |
260 | } | |
261 | ||
262 | static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present) | |
263 | { | |
264 | sci_t sci; | |
265 | ||
266 | if (sci_present) | |
267 | memcpy(&sci, hdr->secure_channel_id, | |
268 | sizeof(hdr->secure_channel_id)); | |
269 | else | |
270 | sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES); | |
271 | ||
272 | return sci; | |
273 | } | |
274 | ||
275 | static unsigned int macsec_sectag_len(bool sci_present) | |
276 | { | |
277 | return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0); | |
278 | } | |
279 | ||
280 | static unsigned int macsec_hdr_len(bool sci_present) | |
281 | { | |
282 | return macsec_sectag_len(sci_present) + ETH_HLEN; | |
283 | } | |
284 | ||
285 | static unsigned int macsec_extra_len(bool sci_present) | |
286 | { | |
287 | return macsec_sectag_len(sci_present) + sizeof(__be16); | |
288 | } | |
289 | ||
290 | /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */ | |
291 | static void macsec_fill_sectag(struct macsec_eth_header *h, | |
e0f841f5 TB |
292 | const struct macsec_secy *secy, u32 pn, |
293 | bool sci_present) | |
c09440f7 SD |
294 | { |
295 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
296 | ||
e0f841f5 | 297 | memset(&h->tci_an, 0, macsec_sectag_len(sci_present)); |
c09440f7 SD |
298 | h->eth.h_proto = htons(ETH_P_MACSEC); |
299 | ||
e0f841f5 | 300 | if (sci_present) { |
c09440f7 SD |
301 | h->tci_an |= MACSEC_TCI_SC; |
302 | memcpy(&h->secure_channel_id, &secy->sci, | |
303 | sizeof(h->secure_channel_id)); | |
304 | } else { | |
305 | if (tx_sc->end_station) | |
306 | h->tci_an |= MACSEC_TCI_ES; | |
307 | if (tx_sc->scb) | |
308 | h->tci_an |= MACSEC_TCI_SCB; | |
309 | } | |
310 | ||
311 | h->packet_number = htonl(pn); | |
312 | ||
313 | /* with GCM, C/E clear for !encrypt, both set for encrypt */ | |
314 | if (tx_sc->encrypt) | |
315 | h->tci_an |= MACSEC_TCI_CONFID; | |
316 | else if (secy->icv_len != DEFAULT_ICV_LEN) | |
317 | h->tci_an |= MACSEC_TCI_C; | |
318 | ||
319 | h->tci_an |= tx_sc->encoding_sa; | |
320 | } | |
321 | ||
322 | static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len) | |
323 | { | |
324 | if (data_len < MIN_NON_SHORT_LEN) | |
325 | h->short_length = data_len; | |
326 | } | |
327 | ||
3cf3227a AT |
328 | /* Checks if a MACsec interface is being offloaded to an hardware engine */ |
329 | static bool macsec_is_offloaded(struct macsec_dev *macsec) | |
330 | { | |
21114b7f AT |
331 | if (macsec->offload == MACSEC_OFFLOAD_MAC || |
332 | macsec->offload == MACSEC_OFFLOAD_PHY) | |
3cf3227a AT |
333 | return true; |
334 | ||
335 | return false; | |
336 | } | |
337 | ||
338 | /* Checks if underlying layers implement MACsec offloading functions. */ | |
339 | static bool macsec_check_offload(enum macsec_offload offload, | |
340 | struct macsec_dev *macsec) | |
341 | { | |
342 | if (!macsec || !macsec->real_dev) | |
343 | return false; | |
344 | ||
345 | if (offload == MACSEC_OFFLOAD_PHY) | |
346 | return macsec->real_dev->phydev && | |
347 | macsec->real_dev->phydev->macsec_ops; | |
21114b7f AT |
348 | else if (offload == MACSEC_OFFLOAD_MAC) |
349 | return macsec->real_dev->features & NETIF_F_HW_MACSEC && | |
350 | macsec->real_dev->macsec_ops; | |
3cf3227a AT |
351 | |
352 | return false; | |
353 | } | |
354 | ||
355 | static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload, | |
356 | struct macsec_dev *macsec, | |
357 | struct macsec_context *ctx) | |
358 | { | |
359 | if (ctx) { | |
360 | memset(ctx, 0, sizeof(*ctx)); | |
361 | ctx->offload = offload; | |
362 | ||
363 | if (offload == MACSEC_OFFLOAD_PHY) | |
364 | ctx->phydev = macsec->real_dev->phydev; | |
21114b7f AT |
365 | else if (offload == MACSEC_OFFLOAD_MAC) |
366 | ctx->netdev = macsec->real_dev; | |
3cf3227a AT |
367 | } |
368 | ||
21114b7f AT |
369 | if (offload == MACSEC_OFFLOAD_PHY) |
370 | return macsec->real_dev->phydev->macsec_ops; | |
371 | else | |
372 | return macsec->real_dev->macsec_ops; | |
3cf3227a AT |
373 | } |
374 | ||
375 | /* Returns a pointer to the MACsec ops struct if any and updates the MACsec | |
376 | * context device reference if provided. | |
377 | */ | |
378 | static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec, | |
379 | struct macsec_context *ctx) | |
380 | { | |
381 | if (!macsec_check_offload(macsec->offload, macsec)) | |
382 | return NULL; | |
383 | ||
384 | return __macsec_get_ops(macsec->offload, macsec, ctx); | |
385 | } | |
386 | ||
a21ecf0e EM |
387 | /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */ |
388 | static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn) | |
c09440f7 SD |
389 | { |
390 | struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data; | |
391 | int len = skb->len - 2 * ETH_ALEN; | |
392 | int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len; | |
393 | ||
394 | /* a) It comprises at least 17 octets */ | |
395 | if (skb->len <= 16) | |
396 | return false; | |
397 | ||
398 | /* b) MACsec EtherType: already checked */ | |
399 | ||
400 | /* c) V bit is clear */ | |
401 | if (h->tci_an & MACSEC_TCI_VERSION) | |
402 | return false; | |
403 | ||
404 | /* d) ES or SCB => !SC */ | |
405 | if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) && | |
406 | (h->tci_an & MACSEC_TCI_SC)) | |
407 | return false; | |
408 | ||
409 | /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */ | |
410 | if (h->unused) | |
411 | return false; | |
412 | ||
a21ecf0e EM |
413 | /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */ |
414 | if (!h->packet_number && !xpn) | |
c09440f7 SD |
415 | return false; |
416 | ||
417 | /* length check, f) g) h) i) */ | |
418 | if (h->short_length) | |
419 | return len == extra_len + h->short_length; | |
420 | return len >= extra_len + MIN_NON_SHORT_LEN; | |
421 | } | |
422 | ||
423 | #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true)) | |
2ccbe2cb | 424 | #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN |
c09440f7 | 425 | |
a21ecf0e EM |
426 | static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn, |
427 | salt_t salt) | |
428 | { | |
429 | struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv; | |
430 | ||
431 | gcm_iv->ssci = ssci ^ salt.ssci; | |
432 | gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn; | |
433 | } | |
434 | ||
c09440f7 SD |
435 | static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn) |
436 | { | |
437 | struct gcm_iv *gcm_iv = (struct gcm_iv *)iv; | |
438 | ||
439 | gcm_iv->sci = sci; | |
440 | gcm_iv->pn = htonl(pn); | |
441 | } | |
442 | ||
443 | static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) | |
444 | { | |
445 | return (struct macsec_eth_header *)skb_mac_header(skb); | |
446 | } | |
447 | ||
6fc498bc DB |
448 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) |
449 | { | |
450 | return make_sci(dev->dev_addr, port); | |
451 | } | |
452 | ||
5c937de7 AT |
453 | static void __macsec_pn_wrapped(struct macsec_secy *secy, |
454 | struct macsec_tx_sa *tx_sa) | |
455 | { | |
456 | pr_debug("PN wrapped, transitioning to !oper\n"); | |
457 | tx_sa->active = false; | |
458 | if (secy->protect_frames) | |
459 | secy->operational = false; | |
460 | } | |
461 | ||
462 | void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa) | |
463 | { | |
464 | spin_lock_bh(&tx_sa->lock); | |
465 | __macsec_pn_wrapped(secy, tx_sa); | |
466 | spin_unlock_bh(&tx_sa->lock); | |
467 | } | |
468 | EXPORT_SYMBOL_GPL(macsec_pn_wrapped); | |
469 | ||
a21ecf0e EM |
470 | static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa, |
471 | struct macsec_secy *secy) | |
c09440f7 | 472 | { |
a21ecf0e | 473 | pn_t pn; |
c09440f7 SD |
474 | |
475 | spin_lock_bh(&tx_sa->lock); | |
c09440f7 | 476 | |
a21ecf0e EM |
477 | pn = tx_sa->next_pn_halves; |
478 | if (secy->xpn) | |
479 | tx_sa->next_pn++; | |
480 | else | |
481 | tx_sa->next_pn_halves.lower++; | |
482 | ||
5c937de7 AT |
483 | if (tx_sa->next_pn == 0) |
484 | __macsec_pn_wrapped(secy, tx_sa); | |
c09440f7 SD |
485 | spin_unlock_bh(&tx_sa->lock); |
486 | ||
487 | return pn; | |
488 | } | |
489 | ||
490 | static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) | |
491 | { | |
492 | struct macsec_dev *macsec = netdev_priv(dev); | |
493 | ||
494 | skb->dev = macsec->real_dev; | |
495 | skb_reset_mac_header(skb); | |
496 | skb->protocol = eth_hdr(skb)->h_proto; | |
497 | } | |
498 | ||
499 | static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, | |
500 | struct macsec_tx_sa *tx_sa) | |
501 | { | |
502 | struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); | |
503 | ||
504 | u64_stats_update_begin(&txsc_stats->syncp); | |
505 | if (tx_sc->encrypt) { | |
506 | txsc_stats->stats.OutOctetsEncrypted += skb->len; | |
507 | txsc_stats->stats.OutPktsEncrypted++; | |
508 | this_cpu_inc(tx_sa->stats->OutPktsEncrypted); | |
509 | } else { | |
510 | txsc_stats->stats.OutOctetsProtected += skb->len; | |
511 | txsc_stats->stats.OutPktsProtected++; | |
512 | this_cpu_inc(tx_sa->stats->OutPktsProtected); | |
513 | } | |
514 | u64_stats_update_end(&txsc_stats->syncp); | |
515 | } | |
516 | ||
517 | static void count_tx(struct net_device *dev, int ret, int len) | |
518 | { | |
519 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
520 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
521 | ||
522 | u64_stats_update_begin(&stats->syncp); | |
523 | stats->tx_packets++; | |
524 | stats->tx_bytes += len; | |
525 | u64_stats_update_end(&stats->syncp); | |
c09440f7 SD |
526 | } |
527 | } | |
528 | ||
529 | static void macsec_encrypt_done(struct crypto_async_request *base, int err) | |
530 | { | |
531 | struct sk_buff *skb = base->data; | |
532 | struct net_device *dev = skb->dev; | |
533 | struct macsec_dev *macsec = macsec_priv(dev); | |
534 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; | |
535 | int len, ret; | |
536 | ||
537 | aead_request_free(macsec_skb_cb(skb)->req); | |
538 | ||
539 | rcu_read_lock_bh(); | |
540 | macsec_encrypt_finish(skb, dev); | |
541 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
542 | len = skb->len; | |
543 | ret = dev_queue_xmit(skb); | |
544 | count_tx(dev, ret, len); | |
545 | rcu_read_unlock_bh(); | |
546 | ||
547 | macsec_txsa_put(sa); | |
548 | dev_put(dev); | |
549 | } | |
550 | ||
5d9649b3 SD |
551 | static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
552 | unsigned char **iv, | |
5294b830 JD |
553 | struct scatterlist **sg, |
554 | int num_frags) | |
5d9649b3 SD |
555 | { |
556 | size_t size, iv_offset, sg_offset; | |
557 | struct aead_request *req; | |
558 | void *tmp; | |
559 | ||
560 | size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); | |
561 | iv_offset = size; | |
562 | size += GCM_AES_IV_LEN; | |
563 | ||
564 | size = ALIGN(size, __alignof__(struct scatterlist)); | |
565 | sg_offset = size; | |
5294b830 | 566 | size += sizeof(struct scatterlist) * num_frags; |
5d9649b3 SD |
567 | |
568 | tmp = kmalloc(size, GFP_ATOMIC); | |
569 | if (!tmp) | |
570 | return NULL; | |
571 | ||
572 | *iv = (unsigned char *)(tmp + iv_offset); | |
573 | *sg = (struct scatterlist *)(tmp + sg_offset); | |
574 | req = tmp; | |
575 | ||
576 | aead_request_set_tfm(req, tfm); | |
577 | ||
578 | return req; | |
579 | } | |
580 | ||
c09440f7 SD |
581 | static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
582 | struct net_device *dev) | |
583 | { | |
584 | int ret; | |
5d9649b3 | 585 | struct scatterlist *sg; |
5294b830 | 586 | struct sk_buff *trailer; |
5d9649b3 | 587 | unsigned char *iv; |
c09440f7 SD |
588 | struct ethhdr *eth; |
589 | struct macsec_eth_header *hh; | |
590 | size_t unprotected_len; | |
591 | struct aead_request *req; | |
592 | struct macsec_secy *secy; | |
593 | struct macsec_tx_sc *tx_sc; | |
594 | struct macsec_tx_sa *tx_sa; | |
595 | struct macsec_dev *macsec = macsec_priv(dev); | |
e0f841f5 | 596 | bool sci_present; |
a21ecf0e | 597 | pn_t pn; |
c09440f7 SD |
598 | |
599 | secy = &macsec->secy; | |
600 | tx_sc = &secy->tx_sc; | |
601 | ||
602 | /* 10.5.1 TX SA assignment */ | |
603 | tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]); | |
604 | if (!tx_sa) { | |
605 | secy->operational = false; | |
606 | kfree_skb(skb); | |
607 | return ERR_PTR(-EINVAL); | |
608 | } | |
609 | ||
610 | if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || | |
611 | skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { | |
612 | struct sk_buff *nskb = skb_copy_expand(skb, | |
613 | MACSEC_NEEDED_HEADROOM, | |
614 | MACSEC_NEEDED_TAILROOM, | |
615 | GFP_ATOMIC); | |
616 | if (likely(nskb)) { | |
617 | consume_skb(skb); | |
618 | skb = nskb; | |
619 | } else { | |
620 | macsec_txsa_put(tx_sa); | |
621 | kfree_skb(skb); | |
622 | return ERR_PTR(-ENOMEM); | |
623 | } | |
624 | } else { | |
625 | skb = skb_unshare(skb, GFP_ATOMIC); | |
626 | if (!skb) { | |
627 | macsec_txsa_put(tx_sa); | |
628 | return ERR_PTR(-ENOMEM); | |
629 | } | |
630 | } | |
631 | ||
632 | unprotected_len = skb->len; | |
633 | eth = eth_hdr(skb); | |
e0f841f5 | 634 | sci_present = send_sci(secy); |
d58ff351 | 635 | hh = skb_push(skb, macsec_extra_len(sci_present)); |
c09440f7 SD |
636 | memmove(hh, eth, 2 * ETH_ALEN); |
637 | ||
638 | pn = tx_sa_update_pn(tx_sa, secy); | |
a21ecf0e | 639 | if (pn.full64 == 0) { |
c09440f7 SD |
640 | macsec_txsa_put(tx_sa); |
641 | kfree_skb(skb); | |
642 | return ERR_PTR(-ENOLINK); | |
643 | } | |
a21ecf0e | 644 | macsec_fill_sectag(hh, secy, pn.lower, sci_present); |
c09440f7 SD |
645 | macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN); |
646 | ||
c09440f7 SD |
647 | skb_put(skb, secy->icv_len); |
648 | ||
649 | if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { | |
650 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
651 | ||
652 | u64_stats_update_begin(&secy_stats->syncp); | |
653 | secy_stats->stats.OutPktsTooLong++; | |
654 | u64_stats_update_end(&secy_stats->syncp); | |
655 | ||
656 | macsec_txsa_put(tx_sa); | |
657 | kfree_skb(skb); | |
658 | return ERR_PTR(-EINVAL); | |
659 | } | |
660 | ||
5294b830 JD |
661 | ret = skb_cow_data(skb, 0, &trailer); |
662 | if (unlikely(ret < 0)) { | |
663 | macsec_txsa_put(tx_sa); | |
664 | kfree_skb(skb); | |
665 | return ERR_PTR(ret); | |
666 | } | |
667 | ||
668 | req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
669 | if (!req) { |
670 | macsec_txsa_put(tx_sa); | |
671 | kfree_skb(skb); | |
672 | return ERR_PTR(-ENOMEM); | |
673 | } | |
674 | ||
a21ecf0e EM |
675 | if (secy->xpn) |
676 | macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt); | |
677 | else | |
678 | macsec_fill_iv(iv, secy->sci, pn.lower); | |
5d9649b3 | 679 | |
5294b830 | 680 | sg_init_table(sg, ret); |
cda7ea69 JD |
681 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
682 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 683 | aead_request_free(req); |
cda7ea69 JD |
684 | macsec_txsa_put(tx_sa); |
685 | kfree_skb(skb); | |
686 | return ERR_PTR(ret); | |
687 | } | |
c09440f7 SD |
688 | |
689 | if (tx_sc->encrypt) { | |
e0f841f5 | 690 | int len = skb->len - macsec_hdr_len(sci_present) - |
c09440f7 SD |
691 | secy->icv_len; |
692 | aead_request_set_crypt(req, sg, sg, len, iv); | |
e0f841f5 | 693 | aead_request_set_ad(req, macsec_hdr_len(sci_present)); |
c09440f7 SD |
694 | } else { |
695 | aead_request_set_crypt(req, sg, sg, 0, iv); | |
696 | aead_request_set_ad(req, skb->len - secy->icv_len); | |
697 | } | |
698 | ||
699 | macsec_skb_cb(skb)->req = req; | |
700 | macsec_skb_cb(skb)->tx_sa = tx_sa; | |
701 | aead_request_set_callback(req, 0, macsec_encrypt_done, skb); | |
702 | ||
703 | dev_hold(skb->dev); | |
704 | ret = crypto_aead_encrypt(req); | |
705 | if (ret == -EINPROGRESS) { | |
706 | return ERR_PTR(ret); | |
707 | } else if (ret != 0) { | |
708 | dev_put(skb->dev); | |
709 | kfree_skb(skb); | |
710 | aead_request_free(req); | |
711 | macsec_txsa_put(tx_sa); | |
712 | return ERR_PTR(-EINVAL); | |
713 | } | |
714 | ||
715 | dev_put(skb->dev); | |
716 | aead_request_free(req); | |
717 | macsec_txsa_put(tx_sa); | |
718 | ||
719 | return skb; | |
720 | } | |
721 | ||
722 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) | |
723 | { | |
724 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
725 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); | |
726 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); | |
727 | u32 lowest_pn = 0; | |
728 | ||
729 | spin_lock(&rx_sa->lock); | |
a21ecf0e EM |
730 | if (rx_sa->next_pn_halves.lower >= secy->replay_window) |
731 | lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window; | |
c09440f7 SD |
732 | |
733 | /* Now perform replay protection check again | |
734 | * (see IEEE 802.1AE-2006 figure 10-5) | |
735 | */ | |
a21ecf0e EM |
736 | if (secy->replay_protect && pn < lowest_pn && |
737 | (!secy->xpn || pn_same_half(pn, lowest_pn))) { | |
c09440f7 SD |
738 | spin_unlock(&rx_sa->lock); |
739 | u64_stats_update_begin(&rxsc_stats->syncp); | |
740 | rxsc_stats->stats.InPktsLate++; | |
741 | u64_stats_update_end(&rxsc_stats->syncp); | |
742 | return false; | |
743 | } | |
744 | ||
745 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { | |
746 | u64_stats_update_begin(&rxsc_stats->syncp); | |
747 | if (hdr->tci_an & MACSEC_TCI_E) | |
748 | rxsc_stats->stats.InOctetsDecrypted += skb->len; | |
749 | else | |
750 | rxsc_stats->stats.InOctetsValidated += skb->len; | |
751 | u64_stats_update_end(&rxsc_stats->syncp); | |
752 | } | |
753 | ||
754 | if (!macsec_skb_cb(skb)->valid) { | |
755 | spin_unlock(&rx_sa->lock); | |
756 | ||
757 | /* 10.6.5 */ | |
758 | if (hdr->tci_an & MACSEC_TCI_C || | |
759 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
760 | u64_stats_update_begin(&rxsc_stats->syncp); | |
761 | rxsc_stats->stats.InPktsNotValid++; | |
762 | u64_stats_update_end(&rxsc_stats->syncp); | |
763 | return false; | |
764 | } | |
765 | ||
766 | u64_stats_update_begin(&rxsc_stats->syncp); | |
767 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { | |
768 | rxsc_stats->stats.InPktsInvalid++; | |
769 | this_cpu_inc(rx_sa->stats->InPktsInvalid); | |
770 | } else if (pn < lowest_pn) { | |
771 | rxsc_stats->stats.InPktsDelayed++; | |
772 | } else { | |
773 | rxsc_stats->stats.InPktsUnchecked++; | |
774 | } | |
775 | u64_stats_update_end(&rxsc_stats->syncp); | |
776 | } else { | |
777 | u64_stats_update_begin(&rxsc_stats->syncp); | |
778 | if (pn < lowest_pn) { | |
779 | rxsc_stats->stats.InPktsDelayed++; | |
780 | } else { | |
781 | rxsc_stats->stats.InPktsOK++; | |
782 | this_cpu_inc(rx_sa->stats->InPktsOK); | |
783 | } | |
784 | u64_stats_update_end(&rxsc_stats->syncp); | |
785 | ||
a21ecf0e EM |
786 | // Instead of "pn >=" - to support pn overflow in xpn |
787 | if (pn + 1 > rx_sa->next_pn_halves.lower) { | |
788 | rx_sa->next_pn_halves.lower = pn + 1; | |
789 | } else if (secy->xpn && | |
790 | !pn_same_half(pn, rx_sa->next_pn_halves.lower)) { | |
791 | rx_sa->next_pn_halves.upper++; | |
792 | rx_sa->next_pn_halves.lower = pn + 1; | |
793 | } | |
794 | ||
c09440f7 SD |
795 | spin_unlock(&rx_sa->lock); |
796 | } | |
797 | ||
798 | return true; | |
799 | } | |
800 | ||
801 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) | |
802 | { | |
803 | skb->pkt_type = PACKET_HOST; | |
804 | skb->protocol = eth_type_trans(skb, dev); | |
805 | ||
806 | skb_reset_network_header(skb); | |
807 | if (!skb_transport_header_was_set(skb)) | |
808 | skb_reset_transport_header(skb); | |
809 | skb_reset_mac_len(skb); | |
810 | } | |
811 | ||
812 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) | |
813 | { | |
7d8b16b9 | 814 | skb->ip_summed = CHECKSUM_NONE; |
c09440f7 SD |
815 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); |
816 | skb_pull(skb, hdr_len); | |
817 | pskb_trim_unique(skb, skb->len - icv_len); | |
818 | } | |
819 | ||
820 | static void count_rx(struct net_device *dev, int len) | |
821 | { | |
822 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
823 | ||
824 | u64_stats_update_begin(&stats->syncp); | |
825 | stats->rx_packets++; | |
826 | stats->rx_bytes += len; | |
827 | u64_stats_update_end(&stats->syncp); | |
828 | } | |
829 | ||
830 | static void macsec_decrypt_done(struct crypto_async_request *base, int err) | |
831 | { | |
832 | struct sk_buff *skb = base->data; | |
833 | struct net_device *dev = skb->dev; | |
834 | struct macsec_dev *macsec = macsec_priv(dev); | |
835 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
c78ebe1d | 836 | struct macsec_rx_sc *rx_sc = rx_sa->sc; |
863483c9 | 837 | int len; |
c09440f7 SD |
838 | u32 pn; |
839 | ||
840 | aead_request_free(macsec_skb_cb(skb)->req); | |
841 | ||
b3bdc3ac LR |
842 | if (!err) |
843 | macsec_skb_cb(skb)->valid = true; | |
844 | ||
c09440f7 SD |
845 | rcu_read_lock_bh(); |
846 | pn = ntohl(macsec_ethhdr(skb)->packet_number); | |
847 | if (!macsec_post_decrypt(skb, &macsec->secy, pn)) { | |
848 | rcu_read_unlock_bh(); | |
849 | kfree_skb(skb); | |
850 | goto out; | |
851 | } | |
852 | ||
853 | macsec_finalize_skb(skb, macsec->secy.icv_len, | |
854 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
855 | macsec_reset_skb(skb, macsec->secy.netdev); | |
856 | ||
857 | len = skb->len; | |
863483c9 | 858 | if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS) |
c09440f7 | 859 | count_rx(dev, len); |
c09440f7 SD |
860 | |
861 | rcu_read_unlock_bh(); | |
862 | ||
863 | out: | |
864 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 865 | macsec_rxsc_put(rx_sc); |
c09440f7 | 866 | dev_put(dev); |
c09440f7 SD |
867 | } |
868 | ||
869 | static struct sk_buff *macsec_decrypt(struct sk_buff *skb, | |
870 | struct net_device *dev, | |
871 | struct macsec_rx_sa *rx_sa, | |
872 | sci_t sci, | |
873 | struct macsec_secy *secy) | |
874 | { | |
875 | int ret; | |
5d9649b3 | 876 | struct scatterlist *sg; |
5294b830 | 877 | struct sk_buff *trailer; |
5d9649b3 | 878 | unsigned char *iv; |
c09440f7 SD |
879 | struct aead_request *req; |
880 | struct macsec_eth_header *hdr; | |
a21ecf0e | 881 | u32 hdr_pn; |
c09440f7 SD |
882 | u16 icv_len = secy->icv_len; |
883 | ||
884 | macsec_skb_cb(skb)->valid = false; | |
885 | skb = skb_share_check(skb, GFP_ATOMIC); | |
886 | if (!skb) | |
c3b7d0bd | 887 | return ERR_PTR(-ENOMEM); |
c09440f7 | 888 | |
5294b830 JD |
889 | ret = skb_cow_data(skb, 0, &trailer); |
890 | if (unlikely(ret < 0)) { | |
891 | kfree_skb(skb); | |
892 | return ERR_PTR(ret); | |
893 | } | |
894 | req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
895 | if (!req) { |
896 | kfree_skb(skb); | |
c3b7d0bd | 897 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
898 | } |
899 | ||
900 | hdr = (struct macsec_eth_header *)skb->data; | |
a21ecf0e EM |
901 | hdr_pn = ntohl(hdr->packet_number); |
902 | ||
903 | if (secy->xpn) { | |
904 | pn_t recovered_pn = rx_sa->next_pn_halves; | |
905 | ||
906 | recovered_pn.lower = hdr_pn; | |
907 | if (hdr_pn < rx_sa->next_pn_halves.lower && | |
908 | !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower)) | |
909 | recovered_pn.upper++; | |
910 | ||
911 | macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64, | |
912 | rx_sa->key.salt); | |
913 | } else { | |
914 | macsec_fill_iv(iv, sci, hdr_pn); | |
915 | } | |
c09440f7 | 916 | |
5294b830 | 917 | sg_init_table(sg, ret); |
cda7ea69 JD |
918 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
919 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 920 | aead_request_free(req); |
cda7ea69 JD |
921 | kfree_skb(skb); |
922 | return ERR_PTR(ret); | |
923 | } | |
c09440f7 SD |
924 | |
925 | if (hdr->tci_an & MACSEC_TCI_E) { | |
926 | /* confidentiality: ethernet + macsec header | |
927 | * authenticated, encrypted payload | |
928 | */ | |
929 | int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci); | |
930 | ||
931 | aead_request_set_crypt(req, sg, sg, len, iv); | |
932 | aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci)); | |
933 | skb = skb_unshare(skb, GFP_ATOMIC); | |
934 | if (!skb) { | |
935 | aead_request_free(req); | |
c3b7d0bd | 936 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
937 | } |
938 | } else { | |
939 | /* integrity only: all headers + data authenticated */ | |
940 | aead_request_set_crypt(req, sg, sg, icv_len, iv); | |
941 | aead_request_set_ad(req, skb->len - icv_len); | |
942 | } | |
943 | ||
944 | macsec_skb_cb(skb)->req = req; | |
c09440f7 SD |
945 | skb->dev = dev; |
946 | aead_request_set_callback(req, 0, macsec_decrypt_done, skb); | |
947 | ||
948 | dev_hold(dev); | |
949 | ret = crypto_aead_decrypt(req); | |
950 | if (ret == -EINPROGRESS) { | |
c3b7d0bd | 951 | return ERR_PTR(ret); |
c09440f7 SD |
952 | } else if (ret != 0) { |
953 | /* decryption/authentication failed | |
954 | * 10.6 if validateFrames is disabled, deliver anyway | |
955 | */ | |
956 | if (ret != -EBADMSG) { | |
957 | kfree_skb(skb); | |
c3b7d0bd | 958 | skb = ERR_PTR(ret); |
c09440f7 SD |
959 | } |
960 | } else { | |
961 | macsec_skb_cb(skb)->valid = true; | |
962 | } | |
963 | dev_put(dev); | |
964 | ||
965 | aead_request_free(req); | |
966 | ||
967 | return skb; | |
968 | } | |
969 | ||
970 | static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) | |
971 | { | |
972 | struct macsec_rx_sc *rx_sc; | |
973 | ||
974 | for_each_rxsc(secy, rx_sc) { | |
975 | if (rx_sc->sci == sci) | |
976 | return rx_sc; | |
977 | } | |
978 | ||
979 | return NULL; | |
980 | } | |
981 | ||
982 | static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) | |
983 | { | |
984 | struct macsec_rx_sc *rx_sc; | |
985 | ||
986 | for_each_rxsc_rtnl(secy, rx_sc) { | |
987 | if (rx_sc->sci == sci) | |
988 | return rx_sc; | |
989 | } | |
990 | ||
991 | return NULL; | |
992 | } | |
993 | ||
3cf3227a | 994 | static enum rx_handler_result handle_not_macsec(struct sk_buff *skb) |
c09440f7 | 995 | { |
3cf3227a AT |
996 | /* Deliver to the uncontrolled port by default */ |
997 | enum rx_handler_result ret = RX_HANDLER_PASS; | |
f428011b | 998 | struct ethhdr *hdr = eth_hdr(skb); |
c09440f7 SD |
999 | struct macsec_rxh_data *rxd; |
1000 | struct macsec_dev *macsec; | |
1001 | ||
1002 | rcu_read_lock(); | |
1003 | rxd = macsec_data_rcu(skb->dev); | |
1004 | ||
c09440f7 SD |
1005 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
1006 | struct sk_buff *nskb; | |
c09440f7 | 1007 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
f428011b MS |
1008 | struct net_device *ndev = macsec->secy.netdev; |
1009 | ||
1010 | /* If h/w offloading is enabled, HW decodes frames and strips | |
1011 | * the SecTAG, so we have to deduce which port to deliver to. | |
1012 | */ | |
1013 | if (macsec_is_offloaded(macsec) && netif_running(ndev)) { | |
1014 | if (ether_addr_equal_64bits(hdr->h_dest, | |
1015 | ndev->dev_addr)) { | |
1016 | /* exact match, divert skb to this port */ | |
1017 | skb->dev = ndev; | |
1018 | skb->pkt_type = PACKET_HOST; | |
1019 | ret = RX_HANDLER_ANOTHER; | |
1020 | goto out; | |
1021 | } else if (is_multicast_ether_addr_64bits( | |
1022 | hdr->h_dest)) { | |
1023 | /* multicast frame, deliver on this port too */ | |
1024 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1025 | if (!nskb) | |
1026 | break; | |
1027 | ||
1028 | nskb->dev = ndev; | |
1029 | if (ether_addr_equal_64bits(hdr->h_dest, | |
1030 | ndev->broadcast)) | |
1031 | nskb->pkt_type = PACKET_BROADCAST; | |
1032 | else | |
1033 | nskb->pkt_type = PACKET_MULTICAST; | |
1034 | ||
1035 | netif_rx(nskb); | |
1036 | } | |
1037 | continue; | |
1038 | } | |
c09440f7 | 1039 | |
f428011b MS |
1040 | /* 10.6 If the management control validateFrames is not |
1041 | * Strict, frames without a SecTAG are received, counted, and | |
1042 | * delivered to the Controlled Port | |
1043 | */ | |
1044 | if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
c09440f7 SD |
1045 | u64_stats_update_begin(&secy_stats->syncp); |
1046 | secy_stats->stats.InPktsNoTag++; | |
1047 | u64_stats_update_end(&secy_stats->syncp); | |
1048 | continue; | |
1049 | } | |
1050 | ||
1051 | /* deliver on this port */ | |
1052 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1053 | if (!nskb) | |
1054 | break; | |
1055 | ||
f428011b | 1056 | nskb->dev = ndev; |
c09440f7 | 1057 | |
863483c9 | 1058 | if (netif_rx(nskb) == NET_RX_SUCCESS) { |
c09440f7 SD |
1059 | u64_stats_update_begin(&secy_stats->syncp); |
1060 | secy_stats->stats.InPktsUntagged++; | |
1061 | u64_stats_update_end(&secy_stats->syncp); | |
c09440f7 SD |
1062 | } |
1063 | } | |
1064 | ||
3cf3227a | 1065 | out: |
c09440f7 | 1066 | rcu_read_unlock(); |
3cf3227a | 1067 | return ret; |
c09440f7 SD |
1068 | } |
1069 | ||
1070 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) | |
1071 | { | |
1072 | struct sk_buff *skb = *pskb; | |
1073 | struct net_device *dev = skb->dev; | |
1074 | struct macsec_eth_header *hdr; | |
1075 | struct macsec_secy *secy = NULL; | |
1076 | struct macsec_rx_sc *rx_sc; | |
1077 | struct macsec_rx_sa *rx_sa; | |
1078 | struct macsec_rxh_data *rxd; | |
1079 | struct macsec_dev *macsec; | |
1080 | sci_t sci; | |
a21ecf0e | 1081 | u32 hdr_pn; |
c09440f7 SD |
1082 | bool cbit; |
1083 | struct pcpu_rx_sc_stats *rxsc_stats; | |
1084 | struct pcpu_secy_stats *secy_stats; | |
1085 | bool pulled_sci; | |
5491e7c6 | 1086 | int ret; |
c09440f7 SD |
1087 | |
1088 | if (skb_headroom(skb) < ETH_HLEN) | |
1089 | goto drop_direct; | |
1090 | ||
1091 | hdr = macsec_ethhdr(skb); | |
3cf3227a AT |
1092 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) |
1093 | return handle_not_macsec(skb); | |
c09440f7 SD |
1094 | |
1095 | skb = skb_unshare(skb, GFP_ATOMIC); | |
095c02da AS |
1096 | *pskb = skb; |
1097 | if (!skb) | |
c09440f7 | 1098 | return RX_HANDLER_CONSUMED; |
c09440f7 SD |
1099 | |
1100 | pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); | |
1101 | if (!pulled_sci) { | |
1102 | if (!pskb_may_pull(skb, macsec_extra_len(false))) | |
1103 | goto drop_direct; | |
1104 | } | |
1105 | ||
1106 | hdr = macsec_ethhdr(skb); | |
1107 | ||
1108 | /* Frames with a SecTAG that has the TCI E bit set but the C | |
1109 | * bit clear are discarded, as this reserved encoding is used | |
1110 | * to identify frames with a SecTAG that are not to be | |
1111 | * delivered to the Controlled Port. | |
1112 | */ | |
1113 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) | |
1114 | return RX_HANDLER_PASS; | |
1115 | ||
1116 | /* now, pull the extra length */ | |
1117 | if (hdr->tci_an & MACSEC_TCI_SC) { | |
1118 | if (!pulled_sci) | |
1119 | goto drop_direct; | |
1120 | } | |
1121 | ||
1122 | /* ethernet header is part of crypto processing */ | |
1123 | skb_push(skb, ETH_HLEN); | |
1124 | ||
1125 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); | |
1126 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; | |
1127 | sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); | |
1128 | ||
1129 | rcu_read_lock(); | |
1130 | rxd = macsec_data_rcu(skb->dev); | |
1131 | ||
1132 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1133 | struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); | |
7979472b | 1134 | |
c78ebe1d | 1135 | sc = sc ? macsec_rxsc_get(sc) : NULL; |
c09440f7 SD |
1136 | |
1137 | if (sc) { | |
1138 | secy = &macsec->secy; | |
1139 | rx_sc = sc; | |
1140 | break; | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | if (!secy) | |
1145 | goto nosci; | |
1146 | ||
1147 | dev = secy->netdev; | |
1148 | macsec = macsec_priv(dev); | |
1149 | secy_stats = this_cpu_ptr(macsec->stats); | |
1150 | rxsc_stats = this_cpu_ptr(rx_sc->stats); | |
1151 | ||
a21ecf0e | 1152 | if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) { |
c09440f7 SD |
1153 | u64_stats_update_begin(&secy_stats->syncp); |
1154 | secy_stats->stats.InPktsBadTag++; | |
1155 | u64_stats_update_end(&secy_stats->syncp); | |
1156 | goto drop_nosa; | |
1157 | } | |
1158 | ||
1159 | rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); | |
1160 | if (!rx_sa) { | |
1161 | /* 10.6.1 if the SA is not in use */ | |
1162 | ||
1163 | /* If validateFrames is Strict or the C bit in the | |
1164 | * SecTAG is set, discard | |
1165 | */ | |
1166 | if (hdr->tci_an & MACSEC_TCI_C || | |
1167 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
1168 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1169 | rxsc_stats->stats.InPktsNotUsingSA++; | |
1170 | u64_stats_update_end(&rxsc_stats->syncp); | |
1171 | goto drop_nosa; | |
1172 | } | |
1173 | ||
1174 | /* not Strict, the frame (with the SecTAG and ICV | |
1175 | * removed) is delivered to the Controlled Port. | |
1176 | */ | |
1177 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1178 | rxsc_stats->stats.InPktsUnusedSA++; | |
1179 | u64_stats_update_end(&rxsc_stats->syncp); | |
1180 | goto deliver; | |
1181 | } | |
1182 | ||
1183 | /* First, PN check to avoid decrypting obviously wrong packets */ | |
a21ecf0e | 1184 | hdr_pn = ntohl(hdr->packet_number); |
c09440f7 SD |
1185 | if (secy->replay_protect) { |
1186 | bool late; | |
1187 | ||
1188 | spin_lock(&rx_sa->lock); | |
a21ecf0e EM |
1189 | late = rx_sa->next_pn_halves.lower >= secy->replay_window && |
1190 | hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window); | |
1191 | ||
1192 | if (secy->xpn) | |
1193 | late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn); | |
c09440f7 SD |
1194 | spin_unlock(&rx_sa->lock); |
1195 | ||
1196 | if (late) { | |
1197 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1198 | rxsc_stats->stats.InPktsLate++; | |
1199 | u64_stats_update_end(&rxsc_stats->syncp); | |
1200 | goto drop; | |
1201 | } | |
1202 | } | |
1203 | ||
e3a3b626 BG |
1204 | macsec_skb_cb(skb)->rx_sa = rx_sa; |
1205 | ||
c09440f7 SD |
1206 | /* Disabled && !changed text => skip validation */ |
1207 | if (hdr->tci_an & MACSEC_TCI_C || | |
1208 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) | |
1209 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); | |
1210 | ||
c3b7d0bd SD |
1211 | if (IS_ERR(skb)) { |
1212 | /* the decrypt callback needs the reference */ | |
c78ebe1d | 1213 | if (PTR_ERR(skb) != -EINPROGRESS) { |
c3b7d0bd | 1214 | macsec_rxsa_put(rx_sa); |
c78ebe1d SD |
1215 | macsec_rxsc_put(rx_sc); |
1216 | } | |
c09440f7 SD |
1217 | rcu_read_unlock(); |
1218 | *pskb = NULL; | |
1219 | return RX_HANDLER_CONSUMED; | |
1220 | } | |
1221 | ||
a21ecf0e | 1222 | if (!macsec_post_decrypt(skb, secy, hdr_pn)) |
c09440f7 SD |
1223 | goto drop; |
1224 | ||
1225 | deliver: | |
1226 | macsec_finalize_skb(skb, secy->icv_len, | |
1227 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1228 | macsec_reset_skb(skb, secy->netdev); | |
1229 | ||
497f358a SD |
1230 | if (rx_sa) |
1231 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 1232 | macsec_rxsc_put(rx_sc); |
5491e7c6 | 1233 | |
ba56d8ce | 1234 | skb_orphan(skb); |
5491e7c6 PA |
1235 | ret = gro_cells_receive(&macsec->gro_cells, skb); |
1236 | if (ret == NET_RX_SUCCESS) | |
1237 | count_rx(dev, skb->len); | |
1238 | else | |
1239 | macsec->secy.netdev->stats.rx_dropped++; | |
c09440f7 SD |
1240 | |
1241 | rcu_read_unlock(); | |
1242 | ||
5491e7c6 PA |
1243 | *pskb = NULL; |
1244 | return RX_HANDLER_CONSUMED; | |
c09440f7 SD |
1245 | |
1246 | drop: | |
1247 | macsec_rxsa_put(rx_sa); | |
1248 | drop_nosa: | |
c78ebe1d | 1249 | macsec_rxsc_put(rx_sc); |
c09440f7 SD |
1250 | rcu_read_unlock(); |
1251 | drop_direct: | |
1252 | kfree_skb(skb); | |
1253 | *pskb = NULL; | |
1254 | return RX_HANDLER_CONSUMED; | |
1255 | ||
1256 | nosci: | |
1257 | /* 10.6.1 if the SC is not found */ | |
1258 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); | |
1259 | if (!cbit) | |
1260 | macsec_finalize_skb(skb, DEFAULT_ICV_LEN, | |
1261 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
1262 | ||
1263 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1264 | struct sk_buff *nskb; | |
c09440f7 SD |
1265 | |
1266 | secy_stats = this_cpu_ptr(macsec->stats); | |
1267 | ||
1268 | /* If validateFrames is Strict or the C bit in the | |
1269 | * SecTAG is set, discard | |
1270 | */ | |
1271 | if (cbit || | |
1272 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1273 | u64_stats_update_begin(&secy_stats->syncp); | |
1274 | secy_stats->stats.InPktsNoSCI++; | |
1275 | u64_stats_update_end(&secy_stats->syncp); | |
1276 | continue; | |
1277 | } | |
1278 | ||
1279 | /* not strict, the frame (with the SecTAG and ICV | |
1280 | * removed) is delivered to the Controlled Port. | |
1281 | */ | |
1282 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1283 | if (!nskb) | |
1284 | break; | |
1285 | ||
1286 | macsec_reset_skb(nskb, macsec->secy.netdev); | |
1287 | ||
1288 | ret = netif_rx(nskb); | |
1289 | if (ret == NET_RX_SUCCESS) { | |
1290 | u64_stats_update_begin(&secy_stats->syncp); | |
1291 | secy_stats->stats.InPktsUnknownSCI++; | |
1292 | u64_stats_update_end(&secy_stats->syncp); | |
1293 | } else { | |
1294 | macsec->secy.netdev->stats.rx_dropped++; | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | rcu_read_unlock(); | |
1299 | *pskb = skb; | |
1300 | return RX_HANDLER_PASS; | |
1301 | } | |
1302 | ||
1303 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) | |
1304 | { | |
1305 | struct crypto_aead *tfm; | |
1306 | int ret; | |
1307 | ||
6052f7fb | 1308 | tfm = crypto_alloc_aead("gcm(aes)", 0, 0); |
34aedfee DC |
1309 | |
1310 | if (IS_ERR(tfm)) | |
1311 | return tfm; | |
c09440f7 SD |
1312 | |
1313 | ret = crypto_aead_setkey(tfm, key, key_len); | |
34aedfee DC |
1314 | if (ret < 0) |
1315 | goto fail; | |
c09440f7 SD |
1316 | |
1317 | ret = crypto_aead_setauthsize(tfm, icv_len); | |
34aedfee DC |
1318 | if (ret < 0) |
1319 | goto fail; | |
c09440f7 SD |
1320 | |
1321 | return tfm; | |
34aedfee DC |
1322 | fail: |
1323 | crypto_free_aead(tfm); | |
1324 | return ERR_PTR(ret); | |
c09440f7 SD |
1325 | } |
1326 | ||
1327 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, | |
1328 | int icv_len) | |
1329 | { | |
1330 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); | |
1331 | if (!rx_sa->stats) | |
34aedfee | 1332 | return -ENOMEM; |
c09440f7 SD |
1333 | |
1334 | rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1335 | if (IS_ERR(rx_sa->key.tfm)) { |
c09440f7 | 1336 | free_percpu(rx_sa->stats); |
34aedfee | 1337 | return PTR_ERR(rx_sa->key.tfm); |
c09440f7 SD |
1338 | } |
1339 | ||
48ef50fa | 1340 | rx_sa->ssci = MACSEC_UNDEF_SSCI; |
c09440f7 SD |
1341 | rx_sa->active = false; |
1342 | rx_sa->next_pn = 1; | |
e187246f | 1343 | refcount_set(&rx_sa->refcnt, 1); |
c09440f7 SD |
1344 | spin_lock_init(&rx_sa->lock); |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) | |
1350 | { | |
1351 | rx_sa->active = false; | |
1352 | ||
1353 | macsec_rxsa_put(rx_sa); | |
1354 | } | |
1355 | ||
1356 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) | |
1357 | { | |
1358 | int i; | |
1359 | ||
1360 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
1361 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); | |
1362 | ||
1363 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); | |
1364 | if (sa) | |
1365 | clear_rx_sa(sa); | |
1366 | } | |
1367 | ||
1368 | macsec_rxsc_put(rx_sc); | |
1369 | } | |
1370 | ||
1371 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1372 | { | |
1373 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; | |
1374 | ||
1375 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); | |
1376 | rx_sc; | |
1377 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { | |
1378 | if (rx_sc->sci == sci) { | |
1379 | if (rx_sc->active) | |
1380 | secy->n_rx_sc--; | |
1381 | rcu_assign_pointer(*rx_scp, rx_sc->next); | |
1382 | return rx_sc; | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | return NULL; | |
1387 | } | |
1388 | ||
1389 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci) | |
1390 | { | |
1391 | struct macsec_rx_sc *rx_sc; | |
1392 | struct macsec_dev *macsec; | |
1393 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
1394 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
1395 | struct macsec_secy *secy; | |
1396 | ||
1397 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
1398 | if (find_rx_sc_rtnl(&macsec->secy, sci)) | |
1399 | return ERR_PTR(-EEXIST); | |
1400 | } | |
1401 | ||
1402 | rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); | |
1403 | if (!rx_sc) | |
1404 | return ERR_PTR(-ENOMEM); | |
1405 | ||
1406 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); | |
1407 | if (!rx_sc->stats) { | |
1408 | kfree(rx_sc); | |
1409 | return ERR_PTR(-ENOMEM); | |
1410 | } | |
1411 | ||
1412 | rx_sc->sci = sci; | |
1413 | rx_sc->active = true; | |
8676d76f | 1414 | refcount_set(&rx_sc->refcnt, 1); |
c09440f7 SD |
1415 | |
1416 | secy = &macsec_priv(dev)->secy; | |
1417 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); | |
1418 | rcu_assign_pointer(secy->rx_sc, rx_sc); | |
1419 | ||
1420 | if (rx_sc->active) | |
1421 | secy->n_rx_sc++; | |
1422 | ||
1423 | return rx_sc; | |
1424 | } | |
1425 | ||
1426 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, | |
1427 | int icv_len) | |
1428 | { | |
1429 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); | |
1430 | if (!tx_sa->stats) | |
34aedfee | 1431 | return -ENOMEM; |
c09440f7 SD |
1432 | |
1433 | tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1434 | if (IS_ERR(tx_sa->key.tfm)) { |
c09440f7 | 1435 | free_percpu(tx_sa->stats); |
34aedfee | 1436 | return PTR_ERR(tx_sa->key.tfm); |
c09440f7 SD |
1437 | } |
1438 | ||
48ef50fa | 1439 | tx_sa->ssci = MACSEC_UNDEF_SSCI; |
c09440f7 | 1440 | tx_sa->active = false; |
28206cdb | 1441 | refcount_set(&tx_sa->refcnt, 1); |
c09440f7 SD |
1442 | spin_lock_init(&tx_sa->lock); |
1443 | ||
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) | |
1448 | { | |
1449 | tx_sa->active = false; | |
1450 | ||
1451 | macsec_txsa_put(tx_sa); | |
1452 | } | |
1453 | ||
489111e5 | 1454 | static struct genl_family macsec_fam; |
c09440f7 SD |
1455 | |
1456 | static struct net_device *get_dev_from_nl(struct net *net, | |
1457 | struct nlattr **attrs) | |
1458 | { | |
1459 | int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); | |
1460 | struct net_device *dev; | |
1461 | ||
1462 | dev = __dev_get_by_index(net, ifindex); | |
1463 | if (!dev) | |
1464 | return ERR_PTR(-ENODEV); | |
1465 | ||
1466 | if (!netif_is_macsec(dev)) | |
1467 | return ERR_PTR(-ENODEV); | |
1468 | ||
1469 | return dev; | |
1470 | } | |
1471 | ||
791bb3fc MS |
1472 | static enum macsec_offload nla_get_offload(const struct nlattr *nla) |
1473 | { | |
1474 | return (__force enum macsec_offload)nla_get_u8(nla); | |
1475 | } | |
1476 | ||
c09440f7 SD |
1477 | static sci_t nla_get_sci(const struct nlattr *nla) |
1478 | { | |
1479 | return (__force sci_t)nla_get_u64(nla); | |
1480 | } | |
1481 | ||
f60d94c0 ND |
1482 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1483 | int padattr) | |
c09440f7 | 1484 | { |
f60d94c0 | 1485 | return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
c09440f7 SD |
1486 | } |
1487 | ||
48ef50fa EM |
1488 | static ssci_t nla_get_ssci(const struct nlattr *nla) |
1489 | { | |
1490 | return (__force ssci_t)nla_get_u32(nla); | |
1491 | } | |
1492 | ||
1493 | static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value) | |
1494 | { | |
1495 | return nla_put_u32(skb, attrtype, (__force u64)value); | |
1496 | } | |
1497 | ||
c09440f7 SD |
1498 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, |
1499 | struct nlattr **attrs, | |
1500 | struct nlattr **tb_sa, | |
1501 | struct net_device **devp, | |
1502 | struct macsec_secy **secyp, | |
1503 | struct macsec_tx_sc **scp, | |
1504 | u8 *assoc_num) | |
1505 | { | |
1506 | struct net_device *dev; | |
1507 | struct macsec_secy *secy; | |
1508 | struct macsec_tx_sc *tx_sc; | |
1509 | struct macsec_tx_sa *tx_sa; | |
1510 | ||
1511 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1512 | return ERR_PTR(-EINVAL); | |
1513 | ||
1514 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1515 | ||
1516 | dev = get_dev_from_nl(net, attrs); | |
1517 | if (IS_ERR(dev)) | |
1518 | return ERR_CAST(dev); | |
1519 | ||
1520 | if (*assoc_num >= MACSEC_NUM_AN) | |
1521 | return ERR_PTR(-EINVAL); | |
1522 | ||
1523 | secy = &macsec_priv(dev)->secy; | |
1524 | tx_sc = &secy->tx_sc; | |
1525 | ||
1526 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); | |
1527 | if (!tx_sa) | |
1528 | return ERR_PTR(-ENODEV); | |
1529 | ||
1530 | *devp = dev; | |
1531 | *scp = tx_sc; | |
1532 | *secyp = secy; | |
1533 | return tx_sa; | |
1534 | } | |
1535 | ||
1536 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, | |
1537 | struct nlattr **attrs, | |
1538 | struct nlattr **tb_rxsc, | |
1539 | struct net_device **devp, | |
1540 | struct macsec_secy **secyp) | |
1541 | { | |
1542 | struct net_device *dev; | |
1543 | struct macsec_secy *secy; | |
1544 | struct macsec_rx_sc *rx_sc; | |
1545 | sci_t sci; | |
1546 | ||
1547 | dev = get_dev_from_nl(net, attrs); | |
1548 | if (IS_ERR(dev)) | |
1549 | return ERR_CAST(dev); | |
1550 | ||
1551 | secy = &macsec_priv(dev)->secy; | |
1552 | ||
1553 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1554 | return ERR_PTR(-EINVAL); | |
1555 | ||
1556 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1557 | rx_sc = find_rx_sc_rtnl(secy, sci); | |
1558 | if (!rx_sc) | |
1559 | return ERR_PTR(-ENODEV); | |
1560 | ||
1561 | *secyp = secy; | |
1562 | *devp = dev; | |
1563 | ||
1564 | return rx_sc; | |
1565 | } | |
1566 | ||
1567 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, | |
1568 | struct nlattr **attrs, | |
1569 | struct nlattr **tb_rxsc, | |
1570 | struct nlattr **tb_sa, | |
1571 | struct net_device **devp, | |
1572 | struct macsec_secy **secyp, | |
1573 | struct macsec_rx_sc **scp, | |
1574 | u8 *assoc_num) | |
1575 | { | |
1576 | struct macsec_rx_sc *rx_sc; | |
1577 | struct macsec_rx_sa *rx_sa; | |
1578 | ||
1579 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1580 | return ERR_PTR(-EINVAL); | |
1581 | ||
1582 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1583 | if (*assoc_num >= MACSEC_NUM_AN) | |
1584 | return ERR_PTR(-EINVAL); | |
1585 | ||
1586 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); | |
1587 | if (IS_ERR(rx_sc)) | |
1588 | return ERR_CAST(rx_sc); | |
1589 | ||
1590 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); | |
1591 | if (!rx_sa) | |
1592 | return ERR_PTR(-ENODEV); | |
1593 | ||
1594 | *scp = rx_sc; | |
1595 | return rx_sa; | |
1596 | } | |
1597 | ||
c09440f7 SD |
1598 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { |
1599 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
1600 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, | |
1601 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, | |
dcb780fb | 1602 | [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED }, |
c09440f7 SD |
1603 | }; |
1604 | ||
1605 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { | |
1606 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, | |
1607 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1608 | }; | |
1609 | ||
1610 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { | |
1611 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, | |
1612 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
48ef50fa | 1613 | [MACSEC_SA_ATTR_PN] = { .type = NLA_MIN_LEN, .len = 4 }, |
8acca6ac SD |
1614 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1615 | .len = MACSEC_KEYID_LEN, }, | |
c09440f7 | 1616 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
e8660ded | 1617 | .len = MACSEC_MAX_KEY_LEN, }, |
48ef50fa EM |
1618 | [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 }, |
1619 | [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY, | |
1620 | .len = MACSEC_SALT_LEN, }, | |
c09440f7 SD |
1621 | }; |
1622 | ||
dcb780fb AT |
1623 | static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = { |
1624 | [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 }, | |
1625 | }; | |
1626 | ||
3cf3227a AT |
1627 | /* Offloads an operation to a device driver */ |
1628 | static int macsec_offload(int (* const func)(struct macsec_context *), | |
1629 | struct macsec_context *ctx) | |
1630 | { | |
1631 | int ret; | |
1632 | ||
1633 | if (unlikely(!func)) | |
1634 | return 0; | |
1635 | ||
1636 | if (ctx->offload == MACSEC_OFFLOAD_PHY) | |
1637 | mutex_lock(&ctx->phydev->lock); | |
1638 | ||
1639 | /* Phase I: prepare. The drive should fail here if there are going to be | |
1640 | * issues in the commit phase. | |
1641 | */ | |
1642 | ctx->prepare = true; | |
1643 | ret = (*func)(ctx); | |
1644 | if (ret) | |
1645 | goto phy_unlock; | |
1646 | ||
1647 | /* Phase II: commit. This step cannot fail. */ | |
1648 | ctx->prepare = false; | |
1649 | ret = (*func)(ctx); | |
1650 | /* This should never happen: commit is not allowed to fail */ | |
1651 | if (unlikely(ret)) | |
1652 | WARN(1, "MACsec offloading commit failed (%d)\n", ret); | |
1653 | ||
1654 | phy_unlock: | |
1655 | if (ctx->offload == MACSEC_OFFLOAD_PHY) | |
1656 | mutex_unlock(&ctx->phydev->lock); | |
1657 | ||
1658 | return ret; | |
1659 | } | |
1660 | ||
c09440f7 SD |
1661 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) |
1662 | { | |
1663 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) | |
1664 | return -EINVAL; | |
1665 | ||
8cb08174 | 1666 | if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL)) |
c09440f7 SD |
1667 | return -EINVAL; |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
1672 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) | |
1673 | { | |
1674 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) | |
1675 | return -EINVAL; | |
1676 | ||
8cb08174 | 1677 | if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL)) |
c09440f7 SD |
1678 | return -EINVAL; |
1679 | ||
1680 | return 0; | |
1681 | } | |
1682 | ||
1683 | static bool validate_add_rxsa(struct nlattr **attrs) | |
1684 | { | |
1685 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1686 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1687 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1688 | return false; | |
1689 | ||
1690 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1691 | return false; | |
1692 | ||
48ef50fa EM |
1693 | if (attrs[MACSEC_SA_ATTR_PN] && |
1694 | *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
c09440f7 SD |
1695 | return false; |
1696 | ||
1697 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1698 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1699 | return false; | |
1700 | } | |
1701 | ||
8acca6ac SD |
1702 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1703 | return false; | |
1704 | ||
c09440f7 SD |
1705 | return true; |
1706 | } | |
1707 | ||
1708 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1709 | { | |
1710 | struct net_device *dev; | |
1711 | struct nlattr **attrs = info->attrs; | |
1712 | struct macsec_secy *secy; | |
1713 | struct macsec_rx_sc *rx_sc; | |
1714 | struct macsec_rx_sa *rx_sa; | |
1715 | unsigned char assoc_num; | |
48ef50fa | 1716 | int pn_len; |
c09440f7 SD |
1717 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
1718 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1719 | int err; |
c09440f7 SD |
1720 | |
1721 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1722 | return -EINVAL; | |
1723 | ||
1724 | if (parse_sa_config(attrs, tb_sa)) | |
1725 | return -EINVAL; | |
1726 | ||
1727 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1728 | return -EINVAL; | |
1729 | ||
1730 | if (!validate_add_rxsa(tb_sa)) | |
1731 | return -EINVAL; | |
1732 | ||
1733 | rtnl_lock(); | |
1734 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
36b232c8 | 1735 | if (IS_ERR(rx_sc)) { |
c09440f7 SD |
1736 | rtnl_unlock(); |
1737 | return PTR_ERR(rx_sc); | |
1738 | } | |
1739 | ||
1740 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1741 | ||
1742 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1743 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", | |
1744 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1745 | rtnl_unlock(); | |
1746 | return -EINVAL; | |
1747 | } | |
1748 | ||
48ef50fa EM |
1749 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
1750 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
1751 | pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n", | |
1752 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
1753 | rtnl_unlock(); | |
1754 | return -EINVAL; | |
1755 | } | |
1756 | ||
1757 | if (secy->xpn) { | |
1758 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { | |
1759 | rtnl_unlock(); | |
1760 | return -EINVAL; | |
1761 | } | |
1762 | ||
1763 | if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { | |
1764 | pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n", | |
1765 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), | |
1766 | MACSEC_SA_ATTR_SALT); | |
1767 | rtnl_unlock(); | |
1768 | return -EINVAL; | |
1769 | } | |
1770 | } | |
1771 | ||
c09440f7 SD |
1772 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); |
1773 | if (rx_sa) { | |
1774 | rtnl_unlock(); | |
1775 | return -EBUSY; | |
1776 | } | |
1777 | ||
1778 | rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); | |
34aedfee | 1779 | if (!rx_sa) { |
c09440f7 SD |
1780 | rtnl_unlock(); |
1781 | return -ENOMEM; | |
1782 | } | |
1783 | ||
34aedfee DC |
1784 | err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1785 | secy->key_len, secy->icv_len); | |
1786 | if (err < 0) { | |
1787 | kfree(rx_sa); | |
1788 | rtnl_unlock(); | |
1789 | return err; | |
1790 | } | |
1791 | ||
c09440f7 SD |
1792 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
1793 | spin_lock_bh(&rx_sa->lock); | |
48ef50fa | 1794 | rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
1795 | spin_unlock_bh(&rx_sa->lock); |
1796 | } | |
1797 | ||
1798 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1799 | rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1800 | ||
c09440f7 | 1801 | rx_sa->sc = rx_sc; |
3cf3227a AT |
1802 | |
1803 | /* If h/w offloading is available, propagate to the device */ | |
1804 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
1805 | const struct macsec_ops *ops; | |
1806 | struct macsec_context ctx; | |
1807 | ||
1808 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1809 | if (!ops) { | |
1810 | err = -EOPNOTSUPP; | |
1811 | goto cleanup; | |
1812 | } | |
1813 | ||
1814 | ctx.sa.assoc_num = assoc_num; | |
1815 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 1816 | ctx.secy = secy; |
3cf3227a AT |
1817 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1818 | MACSEC_KEYID_LEN); | |
1819 | ||
1820 | err = macsec_offload(ops->mdo_add_rxsa, &ctx); | |
1821 | if (err) | |
1822 | goto cleanup; | |
1823 | } | |
1824 | ||
48ef50fa EM |
1825 | if (secy->xpn) { |
1826 | rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); | |
1827 | nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], | |
1828 | MACSEC_SALT_LEN); | |
1829 | } | |
1830 | ||
3cf3227a | 1831 | nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
c09440f7 SD |
1832 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); |
1833 | ||
1834 | rtnl_unlock(); | |
1835 | ||
1836 | return 0; | |
3cf3227a AT |
1837 | |
1838 | cleanup: | |
1839 | kfree(rx_sa); | |
1840 | rtnl_unlock(); | |
1841 | return err; | |
c09440f7 SD |
1842 | } |
1843 | ||
1844 | static bool validate_add_rxsc(struct nlattr **attrs) | |
1845 | { | |
1846 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) | |
1847 | return false; | |
1848 | ||
1849 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { | |
1850 | if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) | |
1851 | return false; | |
1852 | } | |
1853 | ||
1854 | return true; | |
1855 | } | |
1856 | ||
1857 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1858 | { | |
1859 | struct net_device *dev; | |
1860 | sci_t sci = MACSEC_UNDEF_SCI; | |
1861 | struct nlattr **attrs = info->attrs; | |
1862 | struct macsec_rx_sc *rx_sc; | |
1863 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
182879f8 | 1864 | struct macsec_secy *secy; |
3cf3227a AT |
1865 | bool was_active; |
1866 | int ret; | |
c09440f7 SD |
1867 | |
1868 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1869 | return -EINVAL; | |
1870 | ||
1871 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1872 | return -EINVAL; | |
1873 | ||
1874 | if (!validate_add_rxsc(tb_rxsc)) | |
1875 | return -EINVAL; | |
1876 | ||
1877 | rtnl_lock(); | |
1878 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1879 | if (IS_ERR(dev)) { | |
1880 | rtnl_unlock(); | |
1881 | return PTR_ERR(dev); | |
1882 | } | |
1883 | ||
182879f8 | 1884 | secy = &macsec_priv(dev)->secy; |
c09440f7 SD |
1885 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
1886 | ||
1887 | rx_sc = create_rx_sc(dev, sci); | |
1888 | if (IS_ERR(rx_sc)) { | |
1889 | rtnl_unlock(); | |
1890 | return PTR_ERR(rx_sc); | |
1891 | } | |
1892 | ||
3cf3227a | 1893 | was_active = rx_sc->active; |
c09440f7 SD |
1894 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) |
1895 | rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
1896 | ||
3cf3227a AT |
1897 | if (macsec_is_offloaded(netdev_priv(dev))) { |
1898 | const struct macsec_ops *ops; | |
1899 | struct macsec_context ctx; | |
1900 | ||
1901 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1902 | if (!ops) { | |
1903 | ret = -EOPNOTSUPP; | |
1904 | goto cleanup; | |
1905 | } | |
1906 | ||
1907 | ctx.rx_sc = rx_sc; | |
182879f8 | 1908 | ctx.secy = secy; |
3cf3227a AT |
1909 | |
1910 | ret = macsec_offload(ops->mdo_add_rxsc, &ctx); | |
1911 | if (ret) | |
1912 | goto cleanup; | |
1913 | } | |
1914 | ||
c09440f7 SD |
1915 | rtnl_unlock(); |
1916 | ||
1917 | return 0; | |
3cf3227a AT |
1918 | |
1919 | cleanup: | |
1920 | rx_sc->active = was_active; | |
1921 | rtnl_unlock(); | |
1922 | return ret; | |
c09440f7 SD |
1923 | } |
1924 | ||
1925 | static bool validate_add_txsa(struct nlattr **attrs) | |
1926 | { | |
1927 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1928 | !attrs[MACSEC_SA_ATTR_PN] || | |
1929 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1930 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1931 | return false; | |
1932 | ||
1933 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1934 | return false; | |
1935 | ||
1936 | if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
1937 | return false; | |
1938 | ||
1939 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1940 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1941 | return false; | |
1942 | } | |
1943 | ||
8acca6ac SD |
1944 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1945 | return false; | |
1946 | ||
c09440f7 SD |
1947 | return true; |
1948 | } | |
1949 | ||
1950 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) | |
1951 | { | |
1952 | struct net_device *dev; | |
1953 | struct nlattr **attrs = info->attrs; | |
1954 | struct macsec_secy *secy; | |
1955 | struct macsec_tx_sc *tx_sc; | |
1956 | struct macsec_tx_sa *tx_sa; | |
1957 | unsigned char assoc_num; | |
48ef50fa | 1958 | int pn_len; |
c09440f7 | 1959 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
3cf3227a | 1960 | bool was_operational; |
34aedfee | 1961 | int err; |
c09440f7 SD |
1962 | |
1963 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1964 | return -EINVAL; | |
1965 | ||
1966 | if (parse_sa_config(attrs, tb_sa)) | |
1967 | return -EINVAL; | |
1968 | ||
1969 | if (!validate_add_txsa(tb_sa)) | |
1970 | return -EINVAL; | |
1971 | ||
1972 | rtnl_lock(); | |
1973 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1974 | if (IS_ERR(dev)) { | |
1975 | rtnl_unlock(); | |
1976 | return PTR_ERR(dev); | |
1977 | } | |
1978 | ||
1979 | secy = &macsec_priv(dev)->secy; | |
1980 | tx_sc = &secy->tx_sc; | |
1981 | ||
1982 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1983 | ||
1984 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1985 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", | |
1986 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1987 | rtnl_unlock(); | |
1988 | return -EINVAL; | |
1989 | } | |
1990 | ||
48ef50fa EM |
1991 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
1992 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
1993 | pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n", | |
1994 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
1995 | rtnl_unlock(); | |
1996 | return -EINVAL; | |
1997 | } | |
1998 | ||
1999 | if (secy->xpn) { | |
2000 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { | |
2001 | rtnl_unlock(); | |
2002 | return -EINVAL; | |
2003 | } | |
2004 | ||
2005 | if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { | |
2006 | pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n", | |
2007 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), | |
2008 | MACSEC_SA_ATTR_SALT); | |
2009 | rtnl_unlock(); | |
2010 | return -EINVAL; | |
2011 | } | |
2012 | } | |
2013 | ||
c09440f7 SD |
2014 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); |
2015 | if (tx_sa) { | |
2016 | rtnl_unlock(); | |
2017 | return -EBUSY; | |
2018 | } | |
2019 | ||
2020 | tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); | |
34aedfee | 2021 | if (!tx_sa) { |
c09440f7 SD |
2022 | rtnl_unlock(); |
2023 | return -ENOMEM; | |
2024 | } | |
2025 | ||
34aedfee DC |
2026 | err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
2027 | secy->key_len, secy->icv_len); | |
2028 | if (err < 0) { | |
2029 | kfree(tx_sa); | |
2030 | rtnl_unlock(); | |
2031 | return err; | |
2032 | } | |
2033 | ||
c09440f7 | 2034 | spin_lock_bh(&tx_sa->lock); |
48ef50fa | 2035 | tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2036 | spin_unlock_bh(&tx_sa->lock); |
2037 | ||
2038 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2039 | tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2040 | ||
3cf3227a | 2041 | was_operational = secy->operational; |
c09440f7 SD |
2042 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) |
2043 | secy->operational = true; | |
2044 | ||
3cf3227a AT |
2045 | /* If h/w offloading is available, propagate to the device */ |
2046 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2047 | const struct macsec_ops *ops; | |
2048 | struct macsec_context ctx; | |
2049 | ||
2050 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2051 | if (!ops) { | |
2052 | err = -EOPNOTSUPP; | |
2053 | goto cleanup; | |
2054 | } | |
2055 | ||
2056 | ctx.sa.assoc_num = assoc_num; | |
2057 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2058 | ctx.secy = secy; |
3cf3227a AT |
2059 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
2060 | MACSEC_KEYID_LEN); | |
2061 | ||
2062 | err = macsec_offload(ops->mdo_add_txsa, &ctx); | |
2063 | if (err) | |
2064 | goto cleanup; | |
2065 | } | |
2066 | ||
48ef50fa EM |
2067 | if (secy->xpn) { |
2068 | tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); | |
2069 | nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], | |
2070 | MACSEC_SALT_LEN); | |
2071 | } | |
2072 | ||
3cf3227a | 2073 | nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
c09440f7 SD |
2074 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); |
2075 | ||
2076 | rtnl_unlock(); | |
2077 | ||
2078 | return 0; | |
3cf3227a AT |
2079 | |
2080 | cleanup: | |
2081 | secy->operational = was_operational; | |
2082 | kfree(tx_sa); | |
2083 | rtnl_unlock(); | |
2084 | return err; | |
c09440f7 SD |
2085 | } |
2086 | ||
2087 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2088 | { | |
2089 | struct nlattr **attrs = info->attrs; | |
2090 | struct net_device *dev; | |
2091 | struct macsec_secy *secy; | |
2092 | struct macsec_rx_sc *rx_sc; | |
2093 | struct macsec_rx_sa *rx_sa; | |
2094 | u8 assoc_num; | |
2095 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2096 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2097 | int ret; |
c09440f7 SD |
2098 | |
2099 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2100 | return -EINVAL; | |
2101 | ||
2102 | if (parse_sa_config(attrs, tb_sa)) | |
2103 | return -EINVAL; | |
2104 | ||
2105 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2106 | return -EINVAL; | |
2107 | ||
2108 | rtnl_lock(); | |
2109 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2110 | &dev, &secy, &rx_sc, &assoc_num); | |
2111 | if (IS_ERR(rx_sa)) { | |
2112 | rtnl_unlock(); | |
2113 | return PTR_ERR(rx_sa); | |
2114 | } | |
2115 | ||
2116 | if (rx_sa->active) { | |
2117 | rtnl_unlock(); | |
2118 | return -EBUSY; | |
2119 | } | |
2120 | ||
3cf3227a AT |
2121 | /* If h/w offloading is available, propagate to the device */ |
2122 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2123 | const struct macsec_ops *ops; | |
2124 | struct macsec_context ctx; | |
2125 | ||
2126 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2127 | if (!ops) { | |
2128 | ret = -EOPNOTSUPP; | |
2129 | goto cleanup; | |
2130 | } | |
2131 | ||
2132 | ctx.sa.assoc_num = assoc_num; | |
2133 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 2134 | ctx.secy = secy; |
3cf3227a AT |
2135 | |
2136 | ret = macsec_offload(ops->mdo_del_rxsa, &ctx); | |
2137 | if (ret) | |
2138 | goto cleanup; | |
2139 | } | |
2140 | ||
c09440f7 SD |
2141 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); |
2142 | clear_rx_sa(rx_sa); | |
2143 | ||
2144 | rtnl_unlock(); | |
2145 | ||
2146 | return 0; | |
3cf3227a AT |
2147 | |
2148 | cleanup: | |
2149 | rtnl_unlock(); | |
2150 | return ret; | |
c09440f7 SD |
2151 | } |
2152 | ||
2153 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2154 | { | |
2155 | struct nlattr **attrs = info->attrs; | |
2156 | struct net_device *dev; | |
2157 | struct macsec_secy *secy; | |
2158 | struct macsec_rx_sc *rx_sc; | |
2159 | sci_t sci; | |
2160 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a | 2161 | int ret; |
c09440f7 SD |
2162 | |
2163 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2164 | return -EINVAL; | |
2165 | ||
2166 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2167 | return -EINVAL; | |
2168 | ||
2169 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
2170 | return -EINVAL; | |
2171 | ||
2172 | rtnl_lock(); | |
2173 | dev = get_dev_from_nl(genl_info_net(info), info->attrs); | |
2174 | if (IS_ERR(dev)) { | |
2175 | rtnl_unlock(); | |
2176 | return PTR_ERR(dev); | |
2177 | } | |
2178 | ||
2179 | secy = &macsec_priv(dev)->secy; | |
2180 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
2181 | ||
2182 | rx_sc = del_rx_sc(secy, sci); | |
2183 | if (!rx_sc) { | |
2184 | rtnl_unlock(); | |
2185 | return -ENODEV; | |
2186 | } | |
2187 | ||
3cf3227a AT |
2188 | /* If h/w offloading is available, propagate to the device */ |
2189 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2190 | const struct macsec_ops *ops; | |
2191 | struct macsec_context ctx; | |
2192 | ||
2193 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2194 | if (!ops) { | |
2195 | ret = -EOPNOTSUPP; | |
2196 | goto cleanup; | |
2197 | } | |
2198 | ||
2199 | ctx.rx_sc = rx_sc; | |
182879f8 | 2200 | ctx.secy = secy; |
3cf3227a AT |
2201 | ret = macsec_offload(ops->mdo_del_rxsc, &ctx); |
2202 | if (ret) | |
2203 | goto cleanup; | |
2204 | } | |
2205 | ||
c09440f7 SD |
2206 | free_rx_sc(rx_sc); |
2207 | rtnl_unlock(); | |
2208 | ||
2209 | return 0; | |
3cf3227a AT |
2210 | |
2211 | cleanup: | |
2212 | rtnl_unlock(); | |
2213 | return ret; | |
c09440f7 SD |
2214 | } |
2215 | ||
2216 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) | |
2217 | { | |
2218 | struct nlattr **attrs = info->attrs; | |
2219 | struct net_device *dev; | |
2220 | struct macsec_secy *secy; | |
2221 | struct macsec_tx_sc *tx_sc; | |
2222 | struct macsec_tx_sa *tx_sa; | |
2223 | u8 assoc_num; | |
2224 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2225 | int ret; |
c09440f7 SD |
2226 | |
2227 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2228 | return -EINVAL; | |
2229 | ||
2230 | if (parse_sa_config(attrs, tb_sa)) | |
2231 | return -EINVAL; | |
2232 | ||
2233 | rtnl_lock(); | |
2234 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2235 | &dev, &secy, &tx_sc, &assoc_num); | |
2236 | if (IS_ERR(tx_sa)) { | |
2237 | rtnl_unlock(); | |
2238 | return PTR_ERR(tx_sa); | |
2239 | } | |
2240 | ||
2241 | if (tx_sa->active) { | |
2242 | rtnl_unlock(); | |
2243 | return -EBUSY; | |
2244 | } | |
2245 | ||
3cf3227a AT |
2246 | /* If h/w offloading is available, propagate to the device */ |
2247 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2248 | const struct macsec_ops *ops; | |
2249 | struct macsec_context ctx; | |
2250 | ||
2251 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2252 | if (!ops) { | |
2253 | ret = -EOPNOTSUPP; | |
2254 | goto cleanup; | |
2255 | } | |
2256 | ||
2257 | ctx.sa.assoc_num = assoc_num; | |
2258 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2259 | ctx.secy = secy; |
3cf3227a AT |
2260 | |
2261 | ret = macsec_offload(ops->mdo_del_txsa, &ctx); | |
2262 | if (ret) | |
2263 | goto cleanup; | |
2264 | } | |
2265 | ||
c09440f7 SD |
2266 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); |
2267 | clear_tx_sa(tx_sa); | |
2268 | ||
2269 | rtnl_unlock(); | |
2270 | ||
2271 | return 0; | |
3cf3227a AT |
2272 | |
2273 | cleanup: | |
2274 | rtnl_unlock(); | |
2275 | return ret; | |
c09440f7 SD |
2276 | } |
2277 | ||
2278 | static bool validate_upd_sa(struct nlattr **attrs) | |
2279 | { | |
2280 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
2281 | attrs[MACSEC_SA_ATTR_KEY] || | |
48ef50fa EM |
2282 | attrs[MACSEC_SA_ATTR_KEYID] || |
2283 | attrs[MACSEC_SA_ATTR_SSCI] || | |
2284 | attrs[MACSEC_SA_ATTR_SALT]) | |
c09440f7 SD |
2285 | return false; |
2286 | ||
2287 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
2288 | return false; | |
2289 | ||
2290 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) | |
2291 | return false; | |
2292 | ||
2293 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
2294 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
2295 | return false; | |
2296 | } | |
2297 | ||
2298 | return true; | |
2299 | } | |
2300 | ||
2301 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) | |
2302 | { | |
2303 | struct nlattr **attrs = info->attrs; | |
2304 | struct net_device *dev; | |
2305 | struct macsec_secy *secy; | |
2306 | struct macsec_tx_sc *tx_sc; | |
2307 | struct macsec_tx_sa *tx_sa; | |
2308 | u8 assoc_num; | |
2309 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2310 | bool was_operational, was_active; |
a21ecf0e | 2311 | pn_t prev_pn; |
3cf3227a | 2312 | int ret = 0; |
c09440f7 | 2313 | |
a21ecf0e EM |
2314 | prev_pn.full64 = 0; |
2315 | ||
c09440f7 SD |
2316 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2317 | return -EINVAL; | |
2318 | ||
2319 | if (parse_sa_config(attrs, tb_sa)) | |
2320 | return -EINVAL; | |
2321 | ||
2322 | if (!validate_upd_sa(tb_sa)) | |
2323 | return -EINVAL; | |
2324 | ||
2325 | rtnl_lock(); | |
2326 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2327 | &dev, &secy, &tx_sc, &assoc_num); | |
2328 | if (IS_ERR(tx_sa)) { | |
2329 | rtnl_unlock(); | |
2330 | return PTR_ERR(tx_sa); | |
2331 | } | |
2332 | ||
2333 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
48ef50fa EM |
2334 | int pn_len; |
2335 | ||
2336 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; | |
2337 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2338 | pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n", | |
2339 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2340 | rtnl_unlock(); | |
2341 | return -EINVAL; | |
2342 | } | |
2343 | ||
c09440f7 | 2344 | spin_lock_bh(&tx_sa->lock); |
a21ecf0e | 2345 | prev_pn = tx_sa->next_pn_halves; |
48ef50fa | 2346 | tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2347 | spin_unlock_bh(&tx_sa->lock); |
2348 | } | |
2349 | ||
3cf3227a | 2350 | was_active = tx_sa->active; |
c09440f7 SD |
2351 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2352 | tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2353 | ||
3cf3227a | 2354 | was_operational = secy->operational; |
c09440f7 SD |
2355 | if (assoc_num == tx_sc->encoding_sa) |
2356 | secy->operational = tx_sa->active; | |
2357 | ||
3cf3227a AT |
2358 | /* If h/w offloading is available, propagate to the device */ |
2359 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2360 | const struct macsec_ops *ops; | |
2361 | struct macsec_context ctx; | |
2362 | ||
2363 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2364 | if (!ops) { | |
2365 | ret = -EOPNOTSUPP; | |
2366 | goto cleanup; | |
2367 | } | |
2368 | ||
2369 | ctx.sa.assoc_num = assoc_num; | |
2370 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2371 | ctx.secy = secy; |
3cf3227a AT |
2372 | |
2373 | ret = macsec_offload(ops->mdo_upd_txsa, &ctx); | |
2374 | if (ret) | |
2375 | goto cleanup; | |
2376 | } | |
2377 | ||
c09440f7 SD |
2378 | rtnl_unlock(); |
2379 | ||
2380 | return 0; | |
3cf3227a AT |
2381 | |
2382 | cleanup: | |
2383 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2384 | spin_lock_bh(&tx_sa->lock); | |
a21ecf0e | 2385 | tx_sa->next_pn_halves = prev_pn; |
3cf3227a AT |
2386 | spin_unlock_bh(&tx_sa->lock); |
2387 | } | |
2388 | tx_sa->active = was_active; | |
2389 | secy->operational = was_operational; | |
2390 | rtnl_unlock(); | |
2391 | return ret; | |
c09440f7 SD |
2392 | } |
2393 | ||
2394 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2395 | { | |
2396 | struct nlattr **attrs = info->attrs; | |
2397 | struct net_device *dev; | |
2398 | struct macsec_secy *secy; | |
2399 | struct macsec_rx_sc *rx_sc; | |
2400 | struct macsec_rx_sa *rx_sa; | |
2401 | u8 assoc_num; | |
2402 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2403 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2404 | bool was_active; |
a21ecf0e | 2405 | pn_t prev_pn; |
3cf3227a | 2406 | int ret = 0; |
c09440f7 | 2407 | |
a21ecf0e EM |
2408 | prev_pn.full64 = 0; |
2409 | ||
c09440f7 SD |
2410 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2411 | return -EINVAL; | |
2412 | ||
2413 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2414 | return -EINVAL; | |
2415 | ||
2416 | if (parse_sa_config(attrs, tb_sa)) | |
2417 | return -EINVAL; | |
2418 | ||
2419 | if (!validate_upd_sa(tb_sa)) | |
2420 | return -EINVAL; | |
2421 | ||
2422 | rtnl_lock(); | |
2423 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2424 | &dev, &secy, &rx_sc, &assoc_num); | |
2425 | if (IS_ERR(rx_sa)) { | |
2426 | rtnl_unlock(); | |
2427 | return PTR_ERR(rx_sa); | |
2428 | } | |
2429 | ||
2430 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
48ef50fa EM |
2431 | int pn_len; |
2432 | ||
2433 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; | |
2434 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2435 | pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n", | |
2436 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2437 | rtnl_unlock(); | |
2438 | return -EINVAL; | |
2439 | } | |
2440 | ||
c09440f7 | 2441 | spin_lock_bh(&rx_sa->lock); |
a21ecf0e | 2442 | prev_pn = rx_sa->next_pn_halves; |
48ef50fa | 2443 | rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2444 | spin_unlock_bh(&rx_sa->lock); |
2445 | } | |
2446 | ||
3cf3227a | 2447 | was_active = rx_sa->active; |
c09440f7 SD |
2448 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2449 | rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2450 | ||
3cf3227a AT |
2451 | /* If h/w offloading is available, propagate to the device */ |
2452 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2453 | const struct macsec_ops *ops; | |
2454 | struct macsec_context ctx; | |
2455 | ||
2456 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2457 | if (!ops) { | |
2458 | ret = -EOPNOTSUPP; | |
2459 | goto cleanup; | |
2460 | } | |
2461 | ||
2462 | ctx.sa.assoc_num = assoc_num; | |
2463 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 2464 | ctx.secy = secy; |
3cf3227a AT |
2465 | |
2466 | ret = macsec_offload(ops->mdo_upd_rxsa, &ctx); | |
2467 | if (ret) | |
2468 | goto cleanup; | |
2469 | } | |
2470 | ||
c09440f7 SD |
2471 | rtnl_unlock(); |
2472 | return 0; | |
3cf3227a AT |
2473 | |
2474 | cleanup: | |
2475 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2476 | spin_lock_bh(&rx_sa->lock); | |
a21ecf0e | 2477 | rx_sa->next_pn_halves = prev_pn; |
3cf3227a AT |
2478 | spin_unlock_bh(&rx_sa->lock); |
2479 | } | |
2480 | rx_sa->active = was_active; | |
2481 | rtnl_unlock(); | |
2482 | return ret; | |
c09440f7 SD |
2483 | } |
2484 | ||
2485 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2486 | { | |
2487 | struct nlattr **attrs = info->attrs; | |
2488 | struct net_device *dev; | |
2489 | struct macsec_secy *secy; | |
2490 | struct macsec_rx_sc *rx_sc; | |
2491 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a AT |
2492 | unsigned int prev_n_rx_sc; |
2493 | bool was_active; | |
2494 | int ret; | |
c09440f7 SD |
2495 | |
2496 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2497 | return -EINVAL; | |
2498 | ||
2499 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2500 | return -EINVAL; | |
2501 | ||
2502 | if (!validate_add_rxsc(tb_rxsc)) | |
2503 | return -EINVAL; | |
2504 | ||
2505 | rtnl_lock(); | |
2506 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
2507 | if (IS_ERR(rx_sc)) { | |
2508 | rtnl_unlock(); | |
2509 | return PTR_ERR(rx_sc); | |
2510 | } | |
2511 | ||
3cf3227a AT |
2512 | was_active = rx_sc->active; |
2513 | prev_n_rx_sc = secy->n_rx_sc; | |
c09440f7 SD |
2514 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { |
2515 | bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
2516 | ||
2517 | if (rx_sc->active != new) | |
2518 | secy->n_rx_sc += new ? 1 : -1; | |
2519 | ||
2520 | rx_sc->active = new; | |
2521 | } | |
2522 | ||
3cf3227a AT |
2523 | /* If h/w offloading is available, propagate to the device */ |
2524 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2525 | const struct macsec_ops *ops; | |
2526 | struct macsec_context ctx; | |
2527 | ||
2528 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2529 | if (!ops) { | |
2530 | ret = -EOPNOTSUPP; | |
2531 | goto cleanup; | |
2532 | } | |
2533 | ||
2534 | ctx.rx_sc = rx_sc; | |
182879f8 | 2535 | ctx.secy = secy; |
3cf3227a AT |
2536 | |
2537 | ret = macsec_offload(ops->mdo_upd_rxsc, &ctx); | |
2538 | if (ret) | |
2539 | goto cleanup; | |
2540 | } | |
2541 | ||
c09440f7 SD |
2542 | rtnl_unlock(); |
2543 | ||
2544 | return 0; | |
3cf3227a AT |
2545 | |
2546 | cleanup: | |
2547 | secy->n_rx_sc = prev_n_rx_sc; | |
2548 | rx_sc->active = was_active; | |
2549 | rtnl_unlock(); | |
2550 | return ret; | |
c09440f7 SD |
2551 | } |
2552 | ||
dcb780fb AT |
2553 | static bool macsec_is_configured(struct macsec_dev *macsec) |
2554 | { | |
2555 | struct macsec_secy *secy = &macsec->secy; | |
2556 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2557 | int i; | |
2558 | ||
2559 | if (secy->n_rx_sc > 0) | |
2560 | return true; | |
2561 | ||
2562 | for (i = 0; i < MACSEC_NUM_AN; i++) | |
2563 | if (tx_sc->sa[i]) | |
2564 | return true; | |
2565 | ||
2566 | return false; | |
2567 | } | |
2568 | ||
2569 | static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info) | |
2570 | { | |
2571 | struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1]; | |
2572 | enum macsec_offload offload, prev_offload; | |
2573 | int (*func)(struct macsec_context *ctx); | |
2574 | struct nlattr **attrs = info->attrs; | |
a249f805 | 2575 | struct net_device *dev; |
dcb780fb AT |
2576 | const struct macsec_ops *ops; |
2577 | struct macsec_context ctx; | |
2578 | struct macsec_dev *macsec; | |
dcb780fb AT |
2579 | int ret; |
2580 | ||
2581 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2582 | return -EINVAL; | |
2583 | ||
2584 | if (!attrs[MACSEC_ATTR_OFFLOAD]) | |
2585 | return -EINVAL; | |
2586 | ||
2587 | if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX, | |
2588 | attrs[MACSEC_ATTR_OFFLOAD], | |
2589 | macsec_genl_offload_policy, NULL)) | |
2590 | return -EINVAL; | |
2591 | ||
2592 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
2593 | if (IS_ERR(dev)) | |
2594 | return PTR_ERR(dev); | |
2595 | macsec = macsec_priv(dev); | |
2596 | ||
aa81700c DC |
2597 | if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) |
2598 | return -EINVAL; | |
2599 | ||
dcb780fb AT |
2600 | offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]); |
2601 | if (macsec->offload == offload) | |
2602 | return 0; | |
2603 | ||
2604 | /* Check if the offloading mode is supported by the underlying layers */ | |
2605 | if (offload != MACSEC_OFFLOAD_OFF && | |
2606 | !macsec_check_offload(offload, macsec)) | |
2607 | return -EOPNOTSUPP; | |
2608 | ||
dcb780fb AT |
2609 | /* Check if the net device is busy. */ |
2610 | if (netif_running(dev)) | |
2611 | return -EBUSY; | |
2612 | ||
2613 | rtnl_lock(); | |
2614 | ||
2615 | prev_offload = macsec->offload; | |
2616 | macsec->offload = offload; | |
2617 | ||
2618 | /* Check if the device already has rules configured: we do not support | |
2619 | * rules migration. | |
2620 | */ | |
2621 | if (macsec_is_configured(macsec)) { | |
2622 | ret = -EBUSY; | |
2623 | goto rollback; | |
2624 | } | |
2625 | ||
2626 | ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload, | |
2627 | macsec, &ctx); | |
2628 | if (!ops) { | |
2629 | ret = -EOPNOTSUPP; | |
2630 | goto rollback; | |
2631 | } | |
2632 | ||
2633 | if (prev_offload == MACSEC_OFFLOAD_OFF) | |
2634 | func = ops->mdo_add_secy; | |
2635 | else | |
2636 | func = ops->mdo_del_secy; | |
2637 | ||
2638 | ctx.secy = &macsec->secy; | |
2639 | ret = macsec_offload(func, &ctx); | |
2640 | if (ret) | |
2641 | goto rollback; | |
2642 | ||
2643 | rtnl_unlock(); | |
c850240b MS |
2644 | /* Force features update, since they are different for SW MACSec and |
2645 | * HW offloading cases. | |
2646 | */ | |
2647 | netdev_update_features(dev); | |
dcb780fb AT |
2648 | return 0; |
2649 | ||
2650 | rollback: | |
2651 | macsec->offload = prev_offload; | |
2652 | ||
2653 | rtnl_unlock(); | |
2654 | return ret; | |
2655 | } | |
2656 | ||
b62c3624 DB |
2657 | static void get_tx_sa_stats(struct net_device *dev, int an, |
2658 | struct macsec_tx_sa *tx_sa, | |
2659 | struct macsec_tx_sa_stats *sum) | |
c09440f7 | 2660 | { |
b62c3624 | 2661 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2662 | int cpu; |
2663 | ||
b62c3624 DB |
2664 | /* If h/w offloading is available, propagate to the device */ |
2665 | if (macsec_is_offloaded(macsec)) { | |
2666 | const struct macsec_ops *ops; | |
2667 | struct macsec_context ctx; | |
2668 | ||
2669 | ops = macsec_get_ops(macsec, &ctx); | |
2670 | if (ops) { | |
2671 | ctx.sa.assoc_num = an; | |
2672 | ctx.sa.tx_sa = tx_sa; | |
2673 | ctx.stats.tx_sa_stats = sum; | |
2674 | ctx.secy = &macsec_priv(dev)->secy; | |
2675 | macsec_offload(ops->mdo_get_tx_sa_stats, &ctx); | |
2676 | } | |
2677 | return; | |
2678 | } | |
2679 | ||
c09440f7 | 2680 | for_each_possible_cpu(cpu) { |
b62c3624 DB |
2681 | const struct macsec_tx_sa_stats *stats = |
2682 | per_cpu_ptr(tx_sa->stats, cpu); | |
c09440f7 | 2683 | |
b62c3624 DB |
2684 | sum->OutPktsProtected += stats->OutPktsProtected; |
2685 | sum->OutPktsEncrypted += stats->OutPktsEncrypted; | |
c09440f7 | 2686 | } |
b62c3624 | 2687 | } |
c09440f7 | 2688 | |
b62c3624 DB |
2689 | static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum) |
2690 | { | |
2691 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, | |
2692 | sum->OutPktsProtected) || | |
2693 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
2694 | sum->OutPktsEncrypted)) | |
c09440f7 SD |
2695 | return -EMSGSIZE; |
2696 | ||
2697 | return 0; | |
2698 | } | |
2699 | ||
b62c3624 DB |
2700 | static void get_rx_sa_stats(struct net_device *dev, |
2701 | struct macsec_rx_sc *rx_sc, int an, | |
2702 | struct macsec_rx_sa *rx_sa, | |
2703 | struct macsec_rx_sa_stats *sum) | |
c09440f7 | 2704 | { |
b62c3624 | 2705 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2706 | int cpu; |
2707 | ||
b62c3624 DB |
2708 | /* If h/w offloading is available, propagate to the device */ |
2709 | if (macsec_is_offloaded(macsec)) { | |
2710 | const struct macsec_ops *ops; | |
2711 | struct macsec_context ctx; | |
2712 | ||
2713 | ops = macsec_get_ops(macsec, &ctx); | |
2714 | if (ops) { | |
2715 | ctx.sa.assoc_num = an; | |
2716 | ctx.sa.rx_sa = rx_sa; | |
2717 | ctx.stats.rx_sa_stats = sum; | |
2718 | ctx.secy = &macsec_priv(dev)->secy; | |
2719 | ctx.rx_sc = rx_sc; | |
2720 | macsec_offload(ops->mdo_get_rx_sa_stats, &ctx); | |
2721 | } | |
2722 | return; | |
2723 | } | |
2724 | ||
c09440f7 | 2725 | for_each_possible_cpu(cpu) { |
b62c3624 DB |
2726 | const struct macsec_rx_sa_stats *stats = |
2727 | per_cpu_ptr(rx_sa->stats, cpu); | |
c09440f7 | 2728 | |
b62c3624 DB |
2729 | sum->InPktsOK += stats->InPktsOK; |
2730 | sum->InPktsInvalid += stats->InPktsInvalid; | |
2731 | sum->InPktsNotValid += stats->InPktsNotValid; | |
2732 | sum->InPktsNotUsingSA += stats->InPktsNotUsingSA; | |
2733 | sum->InPktsUnusedSA += stats->InPktsUnusedSA; | |
c09440f7 | 2734 | } |
b62c3624 | 2735 | } |
c09440f7 | 2736 | |
b62c3624 DB |
2737 | static int copy_rx_sa_stats(struct sk_buff *skb, |
2738 | struct macsec_rx_sa_stats *sum) | |
2739 | { | |
2740 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) || | |
2741 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, | |
2742 | sum->InPktsInvalid) || | |
2743 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, | |
2744 | sum->InPktsNotValid) || | |
2745 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
2746 | sum->InPktsNotUsingSA) || | |
2747 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
2748 | sum->InPktsUnusedSA)) | |
c09440f7 SD |
2749 | return -EMSGSIZE; |
2750 | ||
2751 | return 0; | |
2752 | } | |
2753 | ||
b62c3624 DB |
2754 | static void get_rx_sc_stats(struct net_device *dev, |
2755 | struct macsec_rx_sc *rx_sc, | |
2756 | struct macsec_rx_sc_stats *sum) | |
c09440f7 | 2757 | { |
b62c3624 | 2758 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2759 | int cpu; |
2760 | ||
b62c3624 DB |
2761 | /* If h/w offloading is available, propagate to the device */ |
2762 | if (macsec_is_offloaded(macsec)) { | |
2763 | const struct macsec_ops *ops; | |
2764 | struct macsec_context ctx; | |
2765 | ||
2766 | ops = macsec_get_ops(macsec, &ctx); | |
2767 | if (ops) { | |
2768 | ctx.stats.rx_sc_stats = sum; | |
2769 | ctx.secy = &macsec_priv(dev)->secy; | |
2770 | ctx.rx_sc = rx_sc; | |
2771 | macsec_offload(ops->mdo_get_rx_sc_stats, &ctx); | |
2772 | } | |
2773 | return; | |
2774 | } | |
2775 | ||
c09440f7 SD |
2776 | for_each_possible_cpu(cpu) { |
2777 | const struct pcpu_rx_sc_stats *stats; | |
2778 | struct macsec_rx_sc_stats tmp; | |
2779 | unsigned int start; | |
2780 | ||
b62c3624 | 2781 | stats = per_cpu_ptr(rx_sc->stats, cpu); |
c09440f7 SD |
2782 | do { |
2783 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2784 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2785 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2786 | ||
b62c3624 DB |
2787 | sum->InOctetsValidated += tmp.InOctetsValidated; |
2788 | sum->InOctetsDecrypted += tmp.InOctetsDecrypted; | |
2789 | sum->InPktsUnchecked += tmp.InPktsUnchecked; | |
2790 | sum->InPktsDelayed += tmp.InPktsDelayed; | |
2791 | sum->InPktsOK += tmp.InPktsOK; | |
2792 | sum->InPktsInvalid += tmp.InPktsInvalid; | |
2793 | sum->InPktsLate += tmp.InPktsLate; | |
2794 | sum->InPktsNotValid += tmp.InPktsNotValid; | |
2795 | sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA; | |
2796 | sum->InPktsUnusedSA += tmp.InPktsUnusedSA; | |
c09440f7 | 2797 | } |
b62c3624 | 2798 | } |
c09440f7 | 2799 | |
b62c3624 DB |
2800 | static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum) |
2801 | { | |
f60d94c0 | 2802 | if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
b62c3624 | 2803 | sum->InOctetsValidated, |
f60d94c0 ND |
2804 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2805 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, | |
b62c3624 | 2806 | sum->InOctetsDecrypted, |
f60d94c0 ND |
2807 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2808 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, | |
b62c3624 | 2809 | sum->InPktsUnchecked, |
f60d94c0 ND |
2810 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2811 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, | |
b62c3624 | 2812 | sum->InPktsDelayed, |
f60d94c0 ND |
2813 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2814 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, | |
b62c3624 | 2815 | sum->InPktsOK, |
f60d94c0 ND |
2816 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2817 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, | |
b62c3624 | 2818 | sum->InPktsInvalid, |
f60d94c0 ND |
2819 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2820 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, | |
b62c3624 | 2821 | sum->InPktsLate, |
f60d94c0 ND |
2822 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2823 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, | |
b62c3624 | 2824 | sum->InPktsNotValid, |
f60d94c0 ND |
2825 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2826 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
b62c3624 | 2827 | sum->InPktsNotUsingSA, |
f60d94c0 ND |
2828 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2829 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
b62c3624 | 2830 | sum->InPktsUnusedSA, |
f60d94c0 | 2831 | MACSEC_RXSC_STATS_ATTR_PAD)) |
c09440f7 SD |
2832 | return -EMSGSIZE; |
2833 | ||
2834 | return 0; | |
2835 | } | |
2836 | ||
b62c3624 DB |
2837 | static void get_tx_sc_stats(struct net_device *dev, |
2838 | struct macsec_tx_sc_stats *sum) | |
c09440f7 | 2839 | { |
b62c3624 | 2840 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2841 | int cpu; |
2842 | ||
b62c3624 DB |
2843 | /* If h/w offloading is available, propagate to the device */ |
2844 | if (macsec_is_offloaded(macsec)) { | |
2845 | const struct macsec_ops *ops; | |
2846 | struct macsec_context ctx; | |
2847 | ||
2848 | ops = macsec_get_ops(macsec, &ctx); | |
2849 | if (ops) { | |
2850 | ctx.stats.tx_sc_stats = sum; | |
2851 | ctx.secy = &macsec_priv(dev)->secy; | |
2852 | macsec_offload(ops->mdo_get_tx_sc_stats, &ctx); | |
2853 | } | |
2854 | return; | |
2855 | } | |
2856 | ||
c09440f7 SD |
2857 | for_each_possible_cpu(cpu) { |
2858 | const struct pcpu_tx_sc_stats *stats; | |
2859 | struct macsec_tx_sc_stats tmp; | |
2860 | unsigned int start; | |
2861 | ||
b62c3624 | 2862 | stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu); |
c09440f7 SD |
2863 | do { |
2864 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2865 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2866 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2867 | ||
b62c3624 DB |
2868 | sum->OutPktsProtected += tmp.OutPktsProtected; |
2869 | sum->OutPktsEncrypted += tmp.OutPktsEncrypted; | |
2870 | sum->OutOctetsProtected += tmp.OutOctetsProtected; | |
2871 | sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted; | |
c09440f7 | 2872 | } |
b62c3624 | 2873 | } |
c09440f7 | 2874 | |
b62c3624 DB |
2875 | static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum) |
2876 | { | |
f60d94c0 | 2877 | if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
b62c3624 | 2878 | sum->OutPktsProtected, |
f60d94c0 ND |
2879 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2880 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
b62c3624 | 2881 | sum->OutPktsEncrypted, |
f60d94c0 ND |
2882 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2883 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, | |
b62c3624 | 2884 | sum->OutOctetsProtected, |
f60d94c0 ND |
2885 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2886 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, | |
b62c3624 | 2887 | sum->OutOctetsEncrypted, |
f60d94c0 | 2888 | MACSEC_TXSC_STATS_ATTR_PAD)) |
c09440f7 SD |
2889 | return -EMSGSIZE; |
2890 | ||
2891 | return 0; | |
2892 | } | |
2893 | ||
b62c3624 | 2894 | static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum) |
c09440f7 | 2895 | { |
b62c3624 | 2896 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2897 | int cpu; |
2898 | ||
b62c3624 DB |
2899 | /* If h/w offloading is available, propagate to the device */ |
2900 | if (macsec_is_offloaded(macsec)) { | |
2901 | const struct macsec_ops *ops; | |
2902 | struct macsec_context ctx; | |
2903 | ||
2904 | ops = macsec_get_ops(macsec, &ctx); | |
2905 | if (ops) { | |
2906 | ctx.stats.dev_stats = sum; | |
2907 | ctx.secy = &macsec_priv(dev)->secy; | |
2908 | macsec_offload(ops->mdo_get_dev_stats, &ctx); | |
2909 | } | |
2910 | return; | |
2911 | } | |
2912 | ||
c09440f7 SD |
2913 | for_each_possible_cpu(cpu) { |
2914 | const struct pcpu_secy_stats *stats; | |
2915 | struct macsec_dev_stats tmp; | |
2916 | unsigned int start; | |
2917 | ||
b62c3624 | 2918 | stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu); |
c09440f7 SD |
2919 | do { |
2920 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
2921 | memcpy(&tmp, &stats->stats, sizeof(tmp)); | |
2922 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
2923 | ||
b62c3624 DB |
2924 | sum->OutPktsUntagged += tmp.OutPktsUntagged; |
2925 | sum->InPktsUntagged += tmp.InPktsUntagged; | |
2926 | sum->OutPktsTooLong += tmp.OutPktsTooLong; | |
2927 | sum->InPktsNoTag += tmp.InPktsNoTag; | |
2928 | sum->InPktsBadTag += tmp.InPktsBadTag; | |
2929 | sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI; | |
2930 | sum->InPktsNoSCI += tmp.InPktsNoSCI; | |
2931 | sum->InPktsOverrun += tmp.InPktsOverrun; | |
c09440f7 | 2932 | } |
b62c3624 | 2933 | } |
c09440f7 | 2934 | |
b62c3624 DB |
2935 | static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum) |
2936 | { | |
f60d94c0 | 2937 | if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
b62c3624 | 2938 | sum->OutPktsUntagged, |
f60d94c0 ND |
2939 | MACSEC_SECY_STATS_ATTR_PAD) || |
2940 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, | |
b62c3624 | 2941 | sum->InPktsUntagged, |
f60d94c0 ND |
2942 | MACSEC_SECY_STATS_ATTR_PAD) || |
2943 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, | |
b62c3624 | 2944 | sum->OutPktsTooLong, |
f60d94c0 ND |
2945 | MACSEC_SECY_STATS_ATTR_PAD) || |
2946 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, | |
b62c3624 | 2947 | sum->InPktsNoTag, |
f60d94c0 ND |
2948 | MACSEC_SECY_STATS_ATTR_PAD) || |
2949 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, | |
b62c3624 | 2950 | sum->InPktsBadTag, |
f60d94c0 ND |
2951 | MACSEC_SECY_STATS_ATTR_PAD) || |
2952 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, | |
b62c3624 | 2953 | sum->InPktsUnknownSCI, |
f60d94c0 ND |
2954 | MACSEC_SECY_STATS_ATTR_PAD) || |
2955 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, | |
b62c3624 | 2956 | sum->InPktsNoSCI, |
f60d94c0 ND |
2957 | MACSEC_SECY_STATS_ATTR_PAD) || |
2958 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, | |
b62c3624 | 2959 | sum->InPktsOverrun, |
f60d94c0 | 2960 | MACSEC_SECY_STATS_ATTR_PAD)) |
c09440f7 SD |
2961 | return -EMSGSIZE; |
2962 | ||
2963 | return 0; | |
2964 | } | |
2965 | ||
2966 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) | |
2967 | { | |
2968 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ae0be8de MK |
2969 | struct nlattr *secy_nest = nla_nest_start_noflag(skb, |
2970 | MACSEC_ATTR_SECY); | |
ccfdec90 | 2971 | u64 csid; |
c09440f7 SD |
2972 | |
2973 | if (!secy_nest) | |
2974 | return 1; | |
2975 | ||
ccfdec90 FW |
2976 | switch (secy->key_len) { |
2977 | case MACSEC_GCM_AES_128_SAK_LEN: | |
48ef50fa | 2978 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
2979 | break; |
2980 | case MACSEC_GCM_AES_256_SAK_LEN: | |
48ef50fa | 2981 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
ccfdec90 FW |
2982 | break; |
2983 | default: | |
2984 | goto cancel; | |
2985 | } | |
2986 | ||
f60d94c0 ND |
2987 | if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
2988 | MACSEC_SECY_ATTR_PAD) || | |
2989 | nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, | |
ccfdec90 | 2990 | csid, MACSEC_SECY_ATTR_PAD) || |
c09440f7 SD |
2991 | nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
2992 | nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || | |
2993 | nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || | |
2994 | nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || | |
2995 | nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || | |
2996 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || | |
2997 | nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || | |
2998 | nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || | |
2999 | nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || | |
3000 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) | |
3001 | goto cancel; | |
3002 | ||
3003 | if (secy->replay_protect) { | |
3004 | if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) | |
3005 | goto cancel; | |
3006 | } | |
3007 | ||
3008 | nla_nest_end(skb, secy_nest); | |
3009 | return 0; | |
3010 | ||
3011 | cancel: | |
3012 | nla_nest_cancel(skb, secy_nest); | |
3013 | return 1; | |
3014 | } | |
3015 | ||
e1427237 FW |
3016 | static noinline_for_stack int |
3017 | dump_secy(struct macsec_secy *secy, struct net_device *dev, | |
3018 | struct sk_buff *skb, struct netlink_callback *cb) | |
c09440f7 | 3019 | { |
b62c3624 DB |
3020 | struct macsec_tx_sc_stats tx_sc_stats = {0, }; |
3021 | struct macsec_tx_sa_stats tx_sa_stats = {0, }; | |
3022 | struct macsec_rx_sc_stats rx_sc_stats = {0, }; | |
3023 | struct macsec_rx_sa_stats rx_sa_stats = {0, }; | |
dcb780fb | 3024 | struct macsec_dev *macsec = netdev_priv(dev); |
b62c3624 | 3025 | struct macsec_dev_stats dev_stats = {0, }; |
c09440f7 SD |
3026 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
3027 | struct nlattr *txsa_list, *rxsc_list; | |
dcb780fb | 3028 | struct macsec_rx_sc *rx_sc; |
c09440f7 | 3029 | struct nlattr *attr; |
dcb780fb AT |
3030 | void *hdr; |
3031 | int i, j; | |
c09440f7 SD |
3032 | |
3033 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
3034 | &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); | |
3035 | if (!hdr) | |
3036 | return -EMSGSIZE; | |
3037 | ||
0a833c29 | 3038 | genl_dump_check_consistent(cb, hdr); |
c09440f7 SD |
3039 | |
3040 | if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) | |
3041 | goto nla_put_failure; | |
3042 | ||
dcb780fb AT |
3043 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD); |
3044 | if (!attr) | |
3045 | goto nla_put_failure; | |
3046 | if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload)) | |
3047 | goto nla_put_failure; | |
3048 | nla_nest_end(skb, attr); | |
3049 | ||
c09440f7 SD |
3050 | if (nla_put_secy(secy, skb)) |
3051 | goto nla_put_failure; | |
3052 | ||
ae0be8de | 3053 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS); |
c09440f7 SD |
3054 | if (!attr) |
3055 | goto nla_put_failure; | |
b62c3624 DB |
3056 | |
3057 | get_tx_sc_stats(dev, &tx_sc_stats); | |
3058 | if (copy_tx_sc_stats(skb, &tx_sc_stats)) { | |
c09440f7 SD |
3059 | nla_nest_cancel(skb, attr); |
3060 | goto nla_put_failure; | |
3061 | } | |
3062 | nla_nest_end(skb, attr); | |
3063 | ||
ae0be8de | 3064 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS); |
c09440f7 SD |
3065 | if (!attr) |
3066 | goto nla_put_failure; | |
b62c3624 DB |
3067 | get_secy_stats(dev, &dev_stats); |
3068 | if (copy_secy_stats(skb, &dev_stats)) { | |
c09440f7 SD |
3069 | nla_nest_cancel(skb, attr); |
3070 | goto nla_put_failure; | |
3071 | } | |
3072 | nla_nest_end(skb, attr); | |
3073 | ||
ae0be8de | 3074 | txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST); |
c09440f7 SD |
3075 | if (!txsa_list) |
3076 | goto nla_put_failure; | |
3077 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { | |
3078 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); | |
3079 | struct nlattr *txsa_nest; | |
48ef50fa EM |
3080 | u64 pn; |
3081 | int pn_len; | |
c09440f7 SD |
3082 | |
3083 | if (!tx_sa) | |
3084 | continue; | |
3085 | ||
ae0be8de | 3086 | txsa_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
3087 | if (!txsa_nest) { |
3088 | nla_nest_cancel(skb, txsa_list); | |
3089 | goto nla_put_failure; | |
3090 | } | |
3091 | ||
b62c3624 DB |
3092 | attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS); |
3093 | if (!attr) { | |
3094 | nla_nest_cancel(skb, txsa_nest); | |
3095 | nla_nest_cancel(skb, txsa_list); | |
3096 | goto nla_put_failure; | |
3097 | } | |
3098 | memset(&tx_sa_stats, 0, sizeof(tx_sa_stats)); | |
3099 | get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats); | |
3100 | if (copy_tx_sa_stats(skb, &tx_sa_stats)) { | |
3101 | nla_nest_cancel(skb, attr); | |
3102 | nla_nest_cancel(skb, txsa_nest); | |
3103 | nla_nest_cancel(skb, txsa_list); | |
3104 | goto nla_put_failure; | |
3105 | } | |
3106 | nla_nest_end(skb, attr); | |
3107 | ||
48ef50fa EM |
3108 | if (secy->xpn) { |
3109 | pn = tx_sa->next_pn; | |
3110 | pn_len = MACSEC_XPN_PN_LEN; | |
3111 | } else { | |
3112 | pn = tx_sa->next_pn_halves.lower; | |
3113 | pn_len = MACSEC_DEFAULT_PN_LEN; | |
3114 | } | |
3115 | ||
c09440f7 | 3116 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
48ef50fa | 3117 | nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
8acca6ac | 3118 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
48ef50fa | 3119 | (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) || |
c09440f7 SD |
3120 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
3121 | nla_nest_cancel(skb, txsa_nest); | |
3122 | nla_nest_cancel(skb, txsa_list); | |
3123 | goto nla_put_failure; | |
3124 | } | |
3125 | ||
c09440f7 SD |
3126 | nla_nest_end(skb, txsa_nest); |
3127 | } | |
3128 | nla_nest_end(skb, txsa_list); | |
3129 | ||
ae0be8de | 3130 | rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST); |
c09440f7 SD |
3131 | if (!rxsc_list) |
3132 | goto nla_put_failure; | |
3133 | ||
3134 | j = 1; | |
3135 | for_each_rxsc_rtnl(secy, rx_sc) { | |
3136 | int k; | |
3137 | struct nlattr *rxsa_list; | |
ae0be8de | 3138 | struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
3139 | |
3140 | if (!rxsc_nest) { | |
3141 | nla_nest_cancel(skb, rxsc_list); | |
3142 | goto nla_put_failure; | |
3143 | } | |
3144 | ||
3145 | if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || | |
f60d94c0 ND |
3146 | nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
3147 | MACSEC_RXSC_ATTR_PAD)) { | |
c09440f7 SD |
3148 | nla_nest_cancel(skb, rxsc_nest); |
3149 | nla_nest_cancel(skb, rxsc_list); | |
3150 | goto nla_put_failure; | |
3151 | } | |
3152 | ||
ae0be8de | 3153 | attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS); |
c09440f7 SD |
3154 | if (!attr) { |
3155 | nla_nest_cancel(skb, rxsc_nest); | |
3156 | nla_nest_cancel(skb, rxsc_list); | |
3157 | goto nla_put_failure; | |
3158 | } | |
b62c3624 DB |
3159 | memset(&rx_sc_stats, 0, sizeof(rx_sc_stats)); |
3160 | get_rx_sc_stats(dev, rx_sc, &rx_sc_stats); | |
3161 | if (copy_rx_sc_stats(skb, &rx_sc_stats)) { | |
c09440f7 SD |
3162 | nla_nest_cancel(skb, attr); |
3163 | nla_nest_cancel(skb, rxsc_nest); | |
3164 | nla_nest_cancel(skb, rxsc_list); | |
3165 | goto nla_put_failure; | |
3166 | } | |
3167 | nla_nest_end(skb, attr); | |
3168 | ||
ae0be8de MK |
3169 | rxsa_list = nla_nest_start_noflag(skb, |
3170 | MACSEC_RXSC_ATTR_SA_LIST); | |
c09440f7 SD |
3171 | if (!rxsa_list) { |
3172 | nla_nest_cancel(skb, rxsc_nest); | |
3173 | nla_nest_cancel(skb, rxsc_list); | |
3174 | goto nla_put_failure; | |
3175 | } | |
3176 | ||
3177 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { | |
3178 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); | |
3179 | struct nlattr *rxsa_nest; | |
48ef50fa EM |
3180 | u64 pn; |
3181 | int pn_len; | |
c09440f7 SD |
3182 | |
3183 | if (!rx_sa) | |
3184 | continue; | |
3185 | ||
ae0be8de | 3186 | rxsa_nest = nla_nest_start_noflag(skb, k++); |
c09440f7 SD |
3187 | if (!rxsa_nest) { |
3188 | nla_nest_cancel(skb, rxsa_list); | |
3189 | nla_nest_cancel(skb, rxsc_nest); | |
3190 | nla_nest_cancel(skb, rxsc_list); | |
3191 | goto nla_put_failure; | |
3192 | } | |
3193 | ||
ae0be8de MK |
3194 | attr = nla_nest_start_noflag(skb, |
3195 | MACSEC_SA_ATTR_STATS); | |
c09440f7 SD |
3196 | if (!attr) { |
3197 | nla_nest_cancel(skb, rxsa_list); | |
3198 | nla_nest_cancel(skb, rxsc_nest); | |
3199 | nla_nest_cancel(skb, rxsc_list); | |
3200 | goto nla_put_failure; | |
3201 | } | |
b62c3624 DB |
3202 | memset(&rx_sa_stats, 0, sizeof(rx_sa_stats)); |
3203 | get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats); | |
3204 | if (copy_rx_sa_stats(skb, &rx_sa_stats)) { | |
c09440f7 SD |
3205 | nla_nest_cancel(skb, attr); |
3206 | nla_nest_cancel(skb, rxsa_list); | |
3207 | nla_nest_cancel(skb, rxsc_nest); | |
3208 | nla_nest_cancel(skb, rxsc_list); | |
3209 | goto nla_put_failure; | |
3210 | } | |
3211 | nla_nest_end(skb, attr); | |
3212 | ||
48ef50fa EM |
3213 | if (secy->xpn) { |
3214 | pn = rx_sa->next_pn; | |
3215 | pn_len = MACSEC_XPN_PN_LEN; | |
3216 | } else { | |
3217 | pn = rx_sa->next_pn_halves.lower; | |
3218 | pn_len = MACSEC_DEFAULT_PN_LEN; | |
3219 | } | |
3220 | ||
c09440f7 | 3221 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
48ef50fa | 3222 | nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
8acca6ac | 3223 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
48ef50fa | 3224 | (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) || |
c09440f7 SD |
3225 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
3226 | nla_nest_cancel(skb, rxsa_nest); | |
3227 | nla_nest_cancel(skb, rxsc_nest); | |
3228 | nla_nest_cancel(skb, rxsc_list); | |
3229 | goto nla_put_failure; | |
3230 | } | |
3231 | nla_nest_end(skb, rxsa_nest); | |
3232 | } | |
3233 | ||
3234 | nla_nest_end(skb, rxsa_list); | |
3235 | nla_nest_end(skb, rxsc_nest); | |
3236 | } | |
3237 | ||
3238 | nla_nest_end(skb, rxsc_list); | |
3239 | ||
c09440f7 SD |
3240 | genlmsg_end(skb, hdr); |
3241 | ||
3242 | return 0; | |
3243 | ||
3244 | nla_put_failure: | |
c09440f7 SD |
3245 | genlmsg_cancel(skb, hdr); |
3246 | return -EMSGSIZE; | |
3247 | } | |
3248 | ||
96cfc505 SD |
3249 | static int macsec_generation = 1; /* protected by RTNL */ |
3250 | ||
c09440f7 SD |
3251 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
3252 | { | |
3253 | struct net *net = sock_net(skb->sk); | |
3254 | struct net_device *dev; | |
3255 | int dev_idx, d; | |
3256 | ||
3257 | dev_idx = cb->args[0]; | |
3258 | ||
3259 | d = 0; | |
c10c63ea | 3260 | rtnl_lock(); |
96cfc505 SD |
3261 | |
3262 | cb->seq = macsec_generation; | |
3263 | ||
c09440f7 SD |
3264 | for_each_netdev(net, dev) { |
3265 | struct macsec_secy *secy; | |
3266 | ||
3267 | if (d < dev_idx) | |
3268 | goto next; | |
3269 | ||
3270 | if (!netif_is_macsec(dev)) | |
3271 | goto next; | |
3272 | ||
3273 | secy = &macsec_priv(dev)->secy; | |
3274 | if (dump_secy(secy, dev, skb, cb) < 0) | |
3275 | goto done; | |
3276 | next: | |
3277 | d++; | |
3278 | } | |
3279 | ||
3280 | done: | |
c10c63ea | 3281 | rtnl_unlock(); |
c09440f7 SD |
3282 | cb->args[0] = d; |
3283 | return skb->len; | |
3284 | } | |
3285 | ||
3286 | static const struct genl_ops macsec_genl_ops[] = { | |
3287 | { | |
3288 | .cmd = MACSEC_CMD_GET_TXSC, | |
ef6243ac | 3289 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3290 | .dumpit = macsec_dump_txsc, |
c09440f7 SD |
3291 | }, |
3292 | { | |
3293 | .cmd = MACSEC_CMD_ADD_RXSC, | |
ef6243ac | 3294 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3295 | .doit = macsec_add_rxsc, |
c09440f7 SD |
3296 | .flags = GENL_ADMIN_PERM, |
3297 | }, | |
3298 | { | |
3299 | .cmd = MACSEC_CMD_DEL_RXSC, | |
ef6243ac | 3300 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3301 | .doit = macsec_del_rxsc, |
c09440f7 SD |
3302 | .flags = GENL_ADMIN_PERM, |
3303 | }, | |
3304 | { | |
3305 | .cmd = MACSEC_CMD_UPD_RXSC, | |
ef6243ac | 3306 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3307 | .doit = macsec_upd_rxsc, |
c09440f7 SD |
3308 | .flags = GENL_ADMIN_PERM, |
3309 | }, | |
3310 | { | |
3311 | .cmd = MACSEC_CMD_ADD_TXSA, | |
ef6243ac | 3312 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3313 | .doit = macsec_add_txsa, |
c09440f7 SD |
3314 | .flags = GENL_ADMIN_PERM, |
3315 | }, | |
3316 | { | |
3317 | .cmd = MACSEC_CMD_DEL_TXSA, | |
ef6243ac | 3318 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3319 | .doit = macsec_del_txsa, |
c09440f7 SD |
3320 | .flags = GENL_ADMIN_PERM, |
3321 | }, | |
3322 | { | |
3323 | .cmd = MACSEC_CMD_UPD_TXSA, | |
ef6243ac | 3324 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3325 | .doit = macsec_upd_txsa, |
c09440f7 SD |
3326 | .flags = GENL_ADMIN_PERM, |
3327 | }, | |
3328 | { | |
3329 | .cmd = MACSEC_CMD_ADD_RXSA, | |
ef6243ac | 3330 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3331 | .doit = macsec_add_rxsa, |
c09440f7 SD |
3332 | .flags = GENL_ADMIN_PERM, |
3333 | }, | |
3334 | { | |
3335 | .cmd = MACSEC_CMD_DEL_RXSA, | |
ef6243ac | 3336 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3337 | .doit = macsec_del_rxsa, |
c09440f7 SD |
3338 | .flags = GENL_ADMIN_PERM, |
3339 | }, | |
3340 | { | |
3341 | .cmd = MACSEC_CMD_UPD_RXSA, | |
ef6243ac | 3342 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3343 | .doit = macsec_upd_rxsa, |
c09440f7 SD |
3344 | .flags = GENL_ADMIN_PERM, |
3345 | }, | |
dcb780fb AT |
3346 | { |
3347 | .cmd = MACSEC_CMD_UPD_OFFLOAD, | |
3348 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
3349 | .doit = macsec_upd_offload, | |
3350 | .flags = GENL_ADMIN_PERM, | |
3351 | }, | |
c09440f7 SD |
3352 | }; |
3353 | ||
56989f6d | 3354 | static struct genl_family macsec_fam __ro_after_init = { |
489111e5 JB |
3355 | .name = MACSEC_GENL_NAME, |
3356 | .hdrsize = 0, | |
3357 | .version = MACSEC_GENL_VERSION, | |
3358 | .maxattr = MACSEC_ATTR_MAX, | |
3b0f31f2 | 3359 | .policy = macsec_genl_policy, |
489111e5 JB |
3360 | .netnsok = true, |
3361 | .module = THIS_MODULE, | |
3362 | .ops = macsec_genl_ops, | |
3363 | .n_ops = ARRAY_SIZE(macsec_genl_ops), | |
3364 | }; | |
3365 | ||
c09440f7 SD |
3366 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
3367 | struct net_device *dev) | |
3368 | { | |
3369 | struct macsec_dev *macsec = netdev_priv(dev); | |
3370 | struct macsec_secy *secy = &macsec->secy; | |
3371 | struct pcpu_secy_stats *secy_stats; | |
3372 | int ret, len; | |
3373 | ||
3cf3227a AT |
3374 | if (macsec_is_offloaded(netdev_priv(dev))) { |
3375 | skb->dev = macsec->real_dev; | |
3376 | return dev_queue_xmit(skb); | |
3377 | } | |
3378 | ||
c09440f7 SD |
3379 | /* 10.5 */ |
3380 | if (!secy->protect_frames) { | |
3381 | secy_stats = this_cpu_ptr(macsec->stats); | |
3382 | u64_stats_update_begin(&secy_stats->syncp); | |
3383 | secy_stats->stats.OutPktsUntagged++; | |
3384 | u64_stats_update_end(&secy_stats->syncp); | |
79c62220 | 3385 | skb->dev = macsec->real_dev; |
c09440f7 SD |
3386 | len = skb->len; |
3387 | ret = dev_queue_xmit(skb); | |
3388 | count_tx(dev, ret, len); | |
3389 | return ret; | |
3390 | } | |
3391 | ||
3392 | if (!secy->operational) { | |
3393 | kfree_skb(skb); | |
3394 | dev->stats.tx_dropped++; | |
3395 | return NETDEV_TX_OK; | |
3396 | } | |
3397 | ||
3398 | skb = macsec_encrypt(skb, dev); | |
3399 | if (IS_ERR(skb)) { | |
3400 | if (PTR_ERR(skb) != -EINPROGRESS) | |
3401 | dev->stats.tx_dropped++; | |
3402 | return NETDEV_TX_OK; | |
3403 | } | |
3404 | ||
3405 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
3406 | ||
3407 | macsec_encrypt_finish(skb, dev); | |
3408 | len = skb->len; | |
3409 | ret = dev_queue_xmit(skb); | |
3410 | count_tx(dev, ret, len); | |
3411 | return ret; | |
3412 | } | |
3413 | ||
c850240b | 3414 | #define SW_MACSEC_FEATURES \ |
c09440f7 | 3415 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) |
e2003872 | 3416 | |
c850240b MS |
3417 | /* If h/w offloading is enabled, use real device features save for |
3418 | * VLAN_FEATURES - they require additional ops | |
3419 | * HW_MACSEC - no reason to report it | |
3420 | */ | |
3421 | #define REAL_DEV_FEATURES(dev) \ | |
3422 | ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC)) | |
3423 | ||
c09440f7 SD |
3424 | static int macsec_dev_init(struct net_device *dev) |
3425 | { | |
3426 | struct macsec_dev *macsec = macsec_priv(dev); | |
3427 | struct net_device *real_dev = macsec->real_dev; | |
5491e7c6 | 3428 | int err; |
c09440f7 SD |
3429 | |
3430 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
3431 | if (!dev->tstats) | |
3432 | return -ENOMEM; | |
3433 | ||
5491e7c6 PA |
3434 | err = gro_cells_init(&macsec->gro_cells, dev); |
3435 | if (err) { | |
3436 | free_percpu(dev->tstats); | |
3437 | return err; | |
3438 | } | |
3439 | ||
c850240b MS |
3440 | if (macsec_is_offloaded(macsec)) { |
3441 | dev->features = REAL_DEV_FEATURES(real_dev); | |
3442 | } else { | |
3443 | dev->features = real_dev->features & SW_MACSEC_FEATURES; | |
3444 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
3445 | } | |
c09440f7 SD |
3446 | |
3447 | dev->needed_headroom = real_dev->needed_headroom + | |
3448 | MACSEC_NEEDED_HEADROOM; | |
3449 | dev->needed_tailroom = real_dev->needed_tailroom + | |
3450 | MACSEC_NEEDED_TAILROOM; | |
3451 | ||
3452 | if (is_zero_ether_addr(dev->dev_addr)) | |
3453 | eth_hw_addr_inherit(dev, real_dev); | |
3454 | if (is_zero_ether_addr(dev->broadcast)) | |
3455 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
3456 | ||
3457 | return 0; | |
3458 | } | |
3459 | ||
3460 | static void macsec_dev_uninit(struct net_device *dev) | |
3461 | { | |
5491e7c6 PA |
3462 | struct macsec_dev *macsec = macsec_priv(dev); |
3463 | ||
3464 | gro_cells_destroy(&macsec->gro_cells); | |
c09440f7 SD |
3465 | free_percpu(dev->tstats); |
3466 | } | |
3467 | ||
3468 | static netdev_features_t macsec_fix_features(struct net_device *dev, | |
3469 | netdev_features_t features) | |
3470 | { | |
3471 | struct macsec_dev *macsec = macsec_priv(dev); | |
3472 | struct net_device *real_dev = macsec->real_dev; | |
3473 | ||
c850240b MS |
3474 | if (macsec_is_offloaded(macsec)) |
3475 | return REAL_DEV_FEATURES(real_dev); | |
3476 | ||
3477 | features &= (real_dev->features & SW_MACSEC_FEATURES) | | |
5491e7c6 PA |
3478 | NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; |
3479 | features |= NETIF_F_LLTX; | |
c09440f7 SD |
3480 | |
3481 | return features; | |
3482 | } | |
3483 | ||
3484 | static int macsec_dev_open(struct net_device *dev) | |
3485 | { | |
3486 | struct macsec_dev *macsec = macsec_priv(dev); | |
3487 | struct net_device *real_dev = macsec->real_dev; | |
3488 | int err; | |
3489 | ||
c09440f7 SD |
3490 | err = dev_uc_add(real_dev, dev->dev_addr); |
3491 | if (err < 0) | |
3492 | return err; | |
3493 | ||
3494 | if (dev->flags & IFF_ALLMULTI) { | |
3495 | err = dev_set_allmulti(real_dev, 1); | |
3496 | if (err < 0) | |
3497 | goto del_unicast; | |
3498 | } | |
3499 | ||
3500 | if (dev->flags & IFF_PROMISC) { | |
3501 | err = dev_set_promiscuity(real_dev, 1); | |
3502 | if (err < 0) | |
3503 | goto clear_allmulti; | |
3504 | } | |
3505 | ||
3cf3227a AT |
3506 | /* If h/w offloading is available, propagate to the device */ |
3507 | if (macsec_is_offloaded(macsec)) { | |
3508 | const struct macsec_ops *ops; | |
3509 | struct macsec_context ctx; | |
3510 | ||
3511 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3512 | if (!ops) { | |
3513 | err = -EOPNOTSUPP; | |
3514 | goto clear_allmulti; | |
3515 | } | |
3516 | ||
182879f8 | 3517 | ctx.secy = &macsec->secy; |
3cf3227a AT |
3518 | err = macsec_offload(ops->mdo_dev_open, &ctx); |
3519 | if (err) | |
3520 | goto clear_allmulti; | |
3521 | } | |
3522 | ||
c09440f7 SD |
3523 | if (netif_carrier_ok(real_dev)) |
3524 | netif_carrier_on(dev); | |
3525 | ||
3526 | return 0; | |
3527 | clear_allmulti: | |
3528 | if (dev->flags & IFF_ALLMULTI) | |
3529 | dev_set_allmulti(real_dev, -1); | |
3530 | del_unicast: | |
3531 | dev_uc_del(real_dev, dev->dev_addr); | |
3532 | netif_carrier_off(dev); | |
3533 | return err; | |
3534 | } | |
3535 | ||
3536 | static int macsec_dev_stop(struct net_device *dev) | |
3537 | { | |
3538 | struct macsec_dev *macsec = macsec_priv(dev); | |
3539 | struct net_device *real_dev = macsec->real_dev; | |
3540 | ||
3541 | netif_carrier_off(dev); | |
3542 | ||
3cf3227a AT |
3543 | /* If h/w offloading is available, propagate to the device */ |
3544 | if (macsec_is_offloaded(macsec)) { | |
3545 | const struct macsec_ops *ops; | |
3546 | struct macsec_context ctx; | |
3547 | ||
3548 | ops = macsec_get_ops(macsec, &ctx); | |
182879f8 DB |
3549 | if (ops) { |
3550 | ctx.secy = &macsec->secy; | |
3cf3227a | 3551 | macsec_offload(ops->mdo_dev_stop, &ctx); |
182879f8 | 3552 | } |
3cf3227a AT |
3553 | } |
3554 | ||
c09440f7 SD |
3555 | dev_mc_unsync(real_dev, dev); |
3556 | dev_uc_unsync(real_dev, dev); | |
3557 | ||
3558 | if (dev->flags & IFF_ALLMULTI) | |
3559 | dev_set_allmulti(real_dev, -1); | |
3560 | ||
3561 | if (dev->flags & IFF_PROMISC) | |
3562 | dev_set_promiscuity(real_dev, -1); | |
3563 | ||
3564 | dev_uc_del(real_dev, dev->dev_addr); | |
3565 | ||
3566 | return 0; | |
3567 | } | |
3568 | ||
3569 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) | |
3570 | { | |
3571 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3572 | ||
3573 | if (!(dev->flags & IFF_UP)) | |
3574 | return; | |
3575 | ||
3576 | if (change & IFF_ALLMULTI) | |
3577 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3578 | ||
3579 | if (change & IFF_PROMISC) | |
3580 | dev_set_promiscuity(real_dev, | |
3581 | dev->flags & IFF_PROMISC ? 1 : -1); | |
3582 | } | |
3583 | ||
3584 | static void macsec_dev_set_rx_mode(struct net_device *dev) | |
3585 | { | |
3586 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3587 | ||
3588 | dev_mc_sync(real_dev, dev); | |
3589 | dev_uc_sync(real_dev, dev); | |
3590 | } | |
3591 | ||
3592 | static int macsec_set_mac_address(struct net_device *dev, void *p) | |
3593 | { | |
3594 | struct macsec_dev *macsec = macsec_priv(dev); | |
3595 | struct net_device *real_dev = macsec->real_dev; | |
3596 | struct sockaddr *addr = p; | |
3597 | int err; | |
3598 | ||
3599 | if (!is_valid_ether_addr(addr->sa_data)) | |
3600 | return -EADDRNOTAVAIL; | |
3601 | ||
3602 | if (!(dev->flags & IFF_UP)) | |
3603 | goto out; | |
3604 | ||
3605 | err = dev_uc_add(real_dev, addr->sa_data); | |
3606 | if (err < 0) | |
3607 | return err; | |
3608 | ||
3609 | dev_uc_del(real_dev, dev->dev_addr); | |
3610 | ||
3611 | out: | |
3612 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
6fc498bc | 3613 | macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES); |
09f4136c DB |
3614 | |
3615 | /* If h/w offloading is available, propagate to the device */ | |
3616 | if (macsec_is_offloaded(macsec)) { | |
3617 | const struct macsec_ops *ops; | |
3618 | struct macsec_context ctx; | |
3619 | ||
3620 | ops = macsec_get_ops(macsec, &ctx); | |
3621 | if (ops) { | |
3622 | ctx.secy = &macsec->secy; | |
3623 | macsec_offload(ops->mdo_upd_secy, &ctx); | |
3624 | } | |
3625 | } | |
3626 | ||
c09440f7 SD |
3627 | return 0; |
3628 | } | |
3629 | ||
3630 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) | |
3631 | { | |
3632 | struct macsec_dev *macsec = macsec_priv(dev); | |
3633 | unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); | |
3634 | ||
3635 | if (macsec->real_dev->mtu - extra < new_mtu) | |
3636 | return -ERANGE; | |
3637 | ||
3638 | dev->mtu = new_mtu; | |
3639 | ||
3640 | return 0; | |
3641 | } | |
3642 | ||
bc1f4470 | 3643 | static void macsec_get_stats64(struct net_device *dev, |
3644 | struct rtnl_link_stats64 *s) | |
c09440f7 SD |
3645 | { |
3646 | int cpu; | |
3647 | ||
3648 | if (!dev->tstats) | |
bc1f4470 | 3649 | return; |
c09440f7 SD |
3650 | |
3651 | for_each_possible_cpu(cpu) { | |
3652 | struct pcpu_sw_netstats *stats; | |
3653 | struct pcpu_sw_netstats tmp; | |
3654 | int start; | |
3655 | ||
3656 | stats = per_cpu_ptr(dev->tstats, cpu); | |
3657 | do { | |
3658 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
3659 | tmp.rx_packets = stats->rx_packets; | |
3660 | tmp.rx_bytes = stats->rx_bytes; | |
3661 | tmp.tx_packets = stats->tx_packets; | |
3662 | tmp.tx_bytes = stats->tx_bytes; | |
3663 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
3664 | ||
3665 | s->rx_packets += tmp.rx_packets; | |
3666 | s->rx_bytes += tmp.rx_bytes; | |
3667 | s->tx_packets += tmp.tx_packets; | |
3668 | s->tx_bytes += tmp.tx_bytes; | |
3669 | } | |
3670 | ||
3671 | s->rx_dropped = dev->stats.rx_dropped; | |
3672 | s->tx_dropped = dev->stats.tx_dropped; | |
c09440f7 SD |
3673 | } |
3674 | ||
3675 | static int macsec_get_iflink(const struct net_device *dev) | |
3676 | { | |
3677 | return macsec_priv(dev)->real_dev->ifindex; | |
3678 | } | |
3679 | ||
3680 | static const struct net_device_ops macsec_netdev_ops = { | |
3681 | .ndo_init = macsec_dev_init, | |
3682 | .ndo_uninit = macsec_dev_uninit, | |
3683 | .ndo_open = macsec_dev_open, | |
3684 | .ndo_stop = macsec_dev_stop, | |
3685 | .ndo_fix_features = macsec_fix_features, | |
3686 | .ndo_change_mtu = macsec_change_mtu, | |
3687 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, | |
3688 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, | |
3689 | .ndo_set_mac_address = macsec_set_mac_address, | |
3690 | .ndo_start_xmit = macsec_start_xmit, | |
3691 | .ndo_get_stats64 = macsec_get_stats64, | |
3692 | .ndo_get_iflink = macsec_get_iflink, | |
3693 | }; | |
3694 | ||
3695 | static const struct device_type macsec_type = { | |
3696 | .name = "macsec", | |
3697 | }; | |
3698 | ||
3699 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { | |
3700 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, | |
31d9a1c5 | 3701 | [IFLA_MACSEC_PORT] = { .type = NLA_U16 }, |
c09440f7 SD |
3702 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, |
3703 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, | |
3704 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, | |
3705 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, | |
3706 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, | |
3707 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, | |
3708 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, | |
3709 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, | |
3710 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, | |
3711 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, | |
3712 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, | |
3713 | }; | |
3714 | ||
3715 | static void macsec_free_netdev(struct net_device *dev) | |
3716 | { | |
3717 | struct macsec_dev *macsec = macsec_priv(dev); | |
c09440f7 SD |
3718 | |
3719 | free_percpu(macsec->stats); | |
3720 | free_percpu(macsec->secy.tx_sc.stats); | |
3721 | ||
c09440f7 SD |
3722 | } |
3723 | ||
3724 | static void macsec_setup(struct net_device *dev) | |
3725 | { | |
3726 | ether_setup(dev); | |
91572088 JW |
3727 | dev->min_mtu = 0; |
3728 | dev->max_mtu = ETH_MAX_MTU; | |
e425974f | 3729 | dev->priv_flags |= IFF_NO_QUEUE; |
c09440f7 | 3730 | dev->netdev_ops = &macsec_netdev_ops; |
cf124db5 DM |
3731 | dev->needs_free_netdev = true; |
3732 | dev->priv_destructor = macsec_free_netdev; | |
c24acf03 | 3733 | SET_NETDEV_DEVTYPE(dev, &macsec_type); |
c09440f7 SD |
3734 | |
3735 | eth_zero_addr(dev->broadcast); | |
3736 | } | |
3737 | ||
ccfdec90 FW |
3738 | static int macsec_changelink_common(struct net_device *dev, |
3739 | struct nlattr *data[]) | |
c09440f7 SD |
3740 | { |
3741 | struct macsec_secy *secy; | |
3742 | struct macsec_tx_sc *tx_sc; | |
3743 | ||
3744 | secy = &macsec_priv(dev)->secy; | |
3745 | tx_sc = &secy->tx_sc; | |
3746 | ||
3747 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3748 | struct macsec_tx_sa *tx_sa; | |
3749 | ||
3750 | tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); | |
3751 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); | |
3752 | ||
3753 | secy->operational = tx_sa && tx_sa->active; | |
3754 | } | |
3755 | ||
3756 | if (data[IFLA_MACSEC_WINDOW]) | |
3757 | secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); | |
3758 | ||
3759 | if (data[IFLA_MACSEC_ENCRYPT]) | |
3760 | tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); | |
3761 | ||
3762 | if (data[IFLA_MACSEC_PROTECT]) | |
3763 | secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); | |
3764 | ||
3765 | if (data[IFLA_MACSEC_INC_SCI]) | |
3766 | tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
3767 | ||
3768 | if (data[IFLA_MACSEC_ES]) | |
3769 | tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); | |
3770 | ||
3771 | if (data[IFLA_MACSEC_SCB]) | |
3772 | tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); | |
3773 | ||
3774 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) | |
3775 | secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); | |
3776 | ||
3777 | if (data[IFLA_MACSEC_VALIDATION]) | |
3778 | secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); | |
ccfdec90 FW |
3779 | |
3780 | if (data[IFLA_MACSEC_CIPHER_SUITE]) { | |
3781 | switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) { | |
3782 | case MACSEC_CIPHER_ID_GCM_AES_128: | |
e8660ded | 3783 | case MACSEC_DEFAULT_CIPHER_ID: |
ccfdec90 | 3784 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
48ef50fa | 3785 | secy->xpn = false; |
ccfdec90 FW |
3786 | break; |
3787 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
3788 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
48ef50fa EM |
3789 | secy->xpn = false; |
3790 | break; | |
3791 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: | |
3792 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; | |
3793 | secy->xpn = true; | |
3794 | break; | |
3795 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: | |
3796 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
3797 | secy->xpn = true; | |
ccfdec90 FW |
3798 | break; |
3799 | default: | |
3800 | return -EINVAL; | |
3801 | } | |
3802 | } | |
3803 | ||
3804 | return 0; | |
c09440f7 SD |
3805 | } |
3806 | ||
3807 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
3808 | struct nlattr *data[], |
3809 | struct netlink_ext_ack *extack) | |
c09440f7 | 3810 | { |
3cf3227a | 3811 | struct macsec_dev *macsec = macsec_priv(dev); |
022e9d60 | 3812 | struct macsec_tx_sc tx_sc; |
3cf3227a AT |
3813 | struct macsec_secy secy; |
3814 | int ret; | |
3815 | ||
c09440f7 SD |
3816 | if (!data) |
3817 | return 0; | |
3818 | ||
3819 | if (data[IFLA_MACSEC_CIPHER_SUITE] || | |
3820 | data[IFLA_MACSEC_ICV_LEN] || | |
3821 | data[IFLA_MACSEC_SCI] || | |
3822 | data[IFLA_MACSEC_PORT]) | |
3823 | return -EINVAL; | |
3824 | ||
3cf3227a AT |
3825 | /* Keep a copy of unmodified secy and tx_sc, in case the offload |
3826 | * propagation fails, to revert macsec_changelink_common. | |
3827 | */ | |
3828 | memcpy(&secy, &macsec->secy, sizeof(secy)); | |
3829 | memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc)); | |
3830 | ||
3831 | ret = macsec_changelink_common(dev, data); | |
3832 | if (ret) | |
3833 | return ret; | |
3834 | ||
3835 | /* If h/w offloading is available, propagate to the device */ | |
3836 | if (macsec_is_offloaded(macsec)) { | |
3837 | const struct macsec_ops *ops; | |
3838 | struct macsec_context ctx; | |
3839 | int ret; | |
3840 | ||
3841 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3842 | if (!ops) { | |
3843 | ret = -EOPNOTSUPP; | |
3844 | goto cleanup; | |
3845 | } | |
3846 | ||
3847 | ctx.secy = &macsec->secy; | |
3848 | ret = macsec_offload(ops->mdo_upd_secy, &ctx); | |
3849 | if (ret) | |
3850 | goto cleanup; | |
3851 | } | |
3852 | ||
3853 | return 0; | |
3854 | ||
3855 | cleanup: | |
3856 | memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc)); | |
3857 | memcpy(&macsec->secy, &secy, sizeof(secy)); | |
3858 | ||
3859 | return ret; | |
c09440f7 SD |
3860 | } |
3861 | ||
3862 | static void macsec_del_dev(struct macsec_dev *macsec) | |
3863 | { | |
3864 | int i; | |
3865 | ||
3866 | while (macsec->secy.rx_sc) { | |
3867 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); | |
3868 | ||
3869 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); | |
3870 | free_rx_sc(rx_sc); | |
3871 | } | |
3872 | ||
3873 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
3874 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); | |
3875 | ||
3876 | if (sa) { | |
3877 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); | |
3878 | clear_tx_sa(sa); | |
3879 | } | |
3880 | } | |
3881 | } | |
3882 | ||
bbe11fab SD |
3883 | static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
3884 | { | |
3885 | struct macsec_dev *macsec = macsec_priv(dev); | |
e2003872 | 3886 | struct net_device *real_dev = macsec->real_dev; |
bbe11fab SD |
3887 | |
3888 | unregister_netdevice_queue(dev, head); | |
3889 | list_del_rcu(&macsec->secys); | |
3890 | macsec_del_dev(macsec); | |
e2003872 | 3891 | netdev_upper_dev_unlink(real_dev, dev); |
bbe11fab SD |
3892 | |
3893 | macsec_generation++; | |
3894 | } | |
3895 | ||
c09440f7 SD |
3896 | static void macsec_dellink(struct net_device *dev, struct list_head *head) |
3897 | { | |
3898 | struct macsec_dev *macsec = macsec_priv(dev); | |
3899 | struct net_device *real_dev = macsec->real_dev; | |
3900 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3901 | ||
3cf3227a AT |
3902 | /* If h/w offloading is available, propagate to the device */ |
3903 | if (macsec_is_offloaded(macsec)) { | |
3904 | const struct macsec_ops *ops; | |
3905 | struct macsec_context ctx; | |
3906 | ||
3907 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3908 | if (ops) { | |
3909 | ctx.secy = &macsec->secy; | |
3910 | macsec_offload(ops->mdo_del_secy, &ctx); | |
3911 | } | |
3912 | } | |
3913 | ||
bbe11fab | 3914 | macsec_common_dellink(dev, head); |
96cfc505 | 3915 | |
960d5848 | 3916 | if (list_empty(&rxd->secys)) { |
c09440f7 | 3917 | netdev_rx_handler_unregister(real_dev); |
960d5848 SD |
3918 | kfree(rxd); |
3919 | } | |
c09440f7 SD |
3920 | } |
3921 | ||
3922 | static int register_macsec_dev(struct net_device *real_dev, | |
3923 | struct net_device *dev) | |
3924 | { | |
3925 | struct macsec_dev *macsec = macsec_priv(dev); | |
3926 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3927 | ||
3928 | if (!rxd) { | |
3929 | int err; | |
3930 | ||
3931 | rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); | |
3932 | if (!rxd) | |
3933 | return -ENOMEM; | |
3934 | ||
3935 | INIT_LIST_HEAD(&rxd->secys); | |
3936 | ||
3937 | err = netdev_rx_handler_register(real_dev, macsec_handle_frame, | |
3938 | rxd); | |
960d5848 SD |
3939 | if (err < 0) { |
3940 | kfree(rxd); | |
c09440f7 | 3941 | return err; |
960d5848 | 3942 | } |
c09440f7 SD |
3943 | } |
3944 | ||
3945 | list_add_tail_rcu(&macsec->secys, &rxd->secys); | |
3946 | return 0; | |
3947 | } | |
3948 | ||
3949 | static bool sci_exists(struct net_device *dev, sci_t sci) | |
3950 | { | |
3951 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); | |
3952 | struct macsec_dev *macsec; | |
3953 | ||
3954 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
3955 | if (macsec->secy.sci == sci) | |
3956 | return true; | |
3957 | } | |
3958 | ||
3959 | return false; | |
3960 | } | |
3961 | ||
c09440f7 SD |
3962 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) |
3963 | { | |
3964 | struct macsec_dev *macsec = macsec_priv(dev); | |
3965 | struct macsec_secy *secy = &macsec->secy; | |
3966 | ||
3967 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); | |
3968 | if (!macsec->stats) | |
3969 | return -ENOMEM; | |
3970 | ||
3971 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); | |
3972 | if (!secy->tx_sc.stats) { | |
3973 | free_percpu(macsec->stats); | |
3974 | return -ENOMEM; | |
3975 | } | |
3976 | ||
3977 | if (sci == MACSEC_UNDEF_SCI) | |
3978 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3979 | ||
3980 | secy->netdev = dev; | |
3981 | secy->operational = true; | |
3982 | secy->key_len = DEFAULT_SAK_LEN; | |
3983 | secy->icv_len = icv_len; | |
3984 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; | |
3985 | secy->protect_frames = true; | |
3986 | secy->replay_protect = false; | |
48ef50fa | 3987 | secy->xpn = DEFAULT_XPN; |
c09440f7 SD |
3988 | |
3989 | secy->sci = sci; | |
3990 | secy->tx_sc.active = true; | |
3991 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; | |
3992 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; | |
3993 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; | |
3994 | secy->tx_sc.end_station = false; | |
3995 | secy->tx_sc.scb = false; | |
3996 | ||
3997 | return 0; | |
3998 | } | |
3999 | ||
4000 | static int macsec_newlink(struct net *net, struct net_device *dev, | |
7a3f4a18 MS |
4001 | struct nlattr *tb[], struct nlattr *data[], |
4002 | struct netlink_ext_ack *extack) | |
c09440f7 SD |
4003 | { |
4004 | struct macsec_dev *macsec = macsec_priv(dev); | |
7f327080 TY |
4005 | rx_handler_func_t *rx_handler; |
4006 | u8 icv_len = DEFAULT_ICV_LEN; | |
c09440f7 | 4007 | struct net_device *real_dev; |
7f327080 | 4008 | int err, mtu; |
c09440f7 | 4009 | sci_t sci; |
c09440f7 SD |
4010 | |
4011 | if (!tb[IFLA_LINK]) | |
4012 | return -EINVAL; | |
4013 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
4014 | if (!real_dev) | |
4015 | return -ENODEV; | |
b06d072c WB |
4016 | if (real_dev->type != ARPHRD_ETHER) |
4017 | return -EINVAL; | |
c09440f7 SD |
4018 | |
4019 | dev->priv_flags |= IFF_MACSEC; | |
4020 | ||
4021 | macsec->real_dev = real_dev; | |
4022 | ||
791bb3fc MS |
4023 | if (data && data[IFLA_MACSEC_OFFLOAD]) |
4024 | macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]); | |
4025 | else | |
4026 | /* MACsec offloading is off by default */ | |
4027 | macsec->offload = MACSEC_OFFLOAD_OFF; | |
4028 | ||
4029 | /* Check if the offloading mode is supported by the underlying layers */ | |
4030 | if (macsec->offload != MACSEC_OFFLOAD_OFF && | |
4031 | !macsec_check_offload(macsec->offload, macsec)) | |
4032 | return -EOPNOTSUPP; | |
3cf3227a | 4033 | |
c09440f7 SD |
4034 | if (data && data[IFLA_MACSEC_ICV_LEN]) |
4035 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
7f327080 TY |
4036 | mtu = real_dev->mtu - icv_len - macsec_extra_len(true); |
4037 | if (mtu < 0) | |
4038 | dev->mtu = 0; | |
4039 | else | |
4040 | dev->mtu = mtu; | |
c09440f7 SD |
4041 | |
4042 | rx_handler = rtnl_dereference(real_dev->rx_handler); | |
4043 | if (rx_handler && rx_handler != macsec_handle_frame) | |
4044 | return -EBUSY; | |
4045 | ||
4046 | err = register_netdevice(dev); | |
4047 | if (err < 0) | |
4048 | return err; | |
4049 | ||
42ab19ee | 4050 | err = netdev_upper_dev_link(real_dev, dev, extack); |
e2003872 | 4051 | if (err < 0) |
bd28899d | 4052 | goto unregister; |
e2003872 | 4053 | |
c09440f7 SD |
4054 | /* need to be already registered so that ->init has run and |
4055 | * the MAC addr is set | |
4056 | */ | |
4057 | if (data && data[IFLA_MACSEC_SCI]) | |
4058 | sci = nla_get_sci(data[IFLA_MACSEC_SCI]); | |
4059 | else if (data && data[IFLA_MACSEC_PORT]) | |
4060 | sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); | |
4061 | else | |
4062 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
4063 | ||
4064 | if (rx_handler && sci_exists(real_dev, sci)) { | |
4065 | err = -EBUSY; | |
e2003872 | 4066 | goto unlink; |
c09440f7 SD |
4067 | } |
4068 | ||
4069 | err = macsec_add_dev(dev, sci, icv_len); | |
4070 | if (err) | |
e2003872 | 4071 | goto unlink; |
c09440f7 | 4072 | |
ccfdec90 FW |
4073 | if (data) { |
4074 | err = macsec_changelink_common(dev, data); | |
4075 | if (err) | |
4076 | goto del_dev; | |
4077 | } | |
c09440f7 | 4078 | |
791bb3fc MS |
4079 | /* If h/w offloading is available, propagate to the device */ |
4080 | if (macsec_is_offloaded(macsec)) { | |
4081 | const struct macsec_ops *ops; | |
4082 | struct macsec_context ctx; | |
4083 | ||
4084 | ops = macsec_get_ops(macsec, &ctx); | |
4085 | if (ops) { | |
4086 | ctx.secy = &macsec->secy; | |
4087 | err = macsec_offload(ops->mdo_add_secy, &ctx); | |
4088 | if (err) | |
4089 | goto del_dev; | |
4090 | } | |
4091 | } | |
4092 | ||
c09440f7 SD |
4093 | err = register_macsec_dev(real_dev, dev); |
4094 | if (err < 0) | |
4095 | goto del_dev; | |
4096 | ||
e6ac0758 SD |
4097 | netif_stacked_transfer_operstate(real_dev, dev); |
4098 | linkwatch_fire_event(dev); | |
4099 | ||
96cfc505 SD |
4100 | macsec_generation++; |
4101 | ||
c09440f7 SD |
4102 | return 0; |
4103 | ||
4104 | del_dev: | |
4105 | macsec_del_dev(macsec); | |
e2003872 SD |
4106 | unlink: |
4107 | netdev_upper_dev_unlink(real_dev, dev); | |
bd28899d | 4108 | unregister: |
c09440f7 SD |
4109 | unregister_netdevice(dev); |
4110 | return err; | |
4111 | } | |
4112 | ||
a8b8a889 MS |
4113 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[], |
4114 | struct netlink_ext_ack *extack) | |
c09440f7 | 4115 | { |
74816480 | 4116 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
c09440f7 SD |
4117 | u8 icv_len = DEFAULT_ICV_LEN; |
4118 | int flag; | |
4119 | bool es, scb, sci; | |
4120 | ||
4121 | if (!data) | |
4122 | return 0; | |
4123 | ||
4124 | if (data[IFLA_MACSEC_CIPHER_SUITE]) | |
4125 | csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); | |
4126 | ||
f04c392d | 4127 | if (data[IFLA_MACSEC_ICV_LEN]) { |
c09440f7 | 4128 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
f04c392d DC |
4129 | if (icv_len != DEFAULT_ICV_LEN) { |
4130 | char dummy_key[DEFAULT_SAK_LEN] = { 0 }; | |
4131 | struct crypto_aead *dummy_tfm; | |
4132 | ||
4133 | dummy_tfm = macsec_alloc_tfm(dummy_key, | |
4134 | DEFAULT_SAK_LEN, | |
4135 | icv_len); | |
4136 | if (IS_ERR(dummy_tfm)) | |
4137 | return PTR_ERR(dummy_tfm); | |
4138 | crypto_free_aead(dummy_tfm); | |
4139 | } | |
4140 | } | |
c09440f7 SD |
4141 | |
4142 | switch (csid) { | |
ccfdec90 FW |
4143 | case MACSEC_CIPHER_ID_GCM_AES_128: |
4144 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
48ef50fa EM |
4145 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: |
4146 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: | |
e8660ded | 4147 | case MACSEC_DEFAULT_CIPHER_ID: |
c09440f7 | 4148 | if (icv_len < MACSEC_MIN_ICV_LEN || |
2ccbe2cb | 4149 | icv_len > MACSEC_STD_ICV_LEN) |
c09440f7 SD |
4150 | return -EINVAL; |
4151 | break; | |
4152 | default: | |
4153 | return -EINVAL; | |
4154 | } | |
4155 | ||
4156 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
4157 | if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) | |
4158 | return -EINVAL; | |
4159 | } | |
4160 | ||
4161 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; | |
4162 | flag < IFLA_MACSEC_VALIDATION; | |
4163 | flag++) { | |
4164 | if (data[flag]) { | |
4165 | if (nla_get_u8(data[flag]) > 1) | |
4166 | return -EINVAL; | |
4167 | } | |
4168 | } | |
4169 | ||
4170 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; | |
4171 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; | |
4172 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; | |
4173 | ||
4174 | if ((sci && (scb || es)) || (scb && es)) | |
4175 | return -EINVAL; | |
4176 | ||
4177 | if (data[IFLA_MACSEC_VALIDATION] && | |
4178 | nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) | |
4179 | return -EINVAL; | |
4180 | ||
4b1fb935 SD |
4181 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
4182 | nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && | |
c09440f7 SD |
4183 | !data[IFLA_MACSEC_WINDOW]) |
4184 | return -EINVAL; | |
4185 | ||
4186 | return 0; | |
4187 | } | |
4188 | ||
4189 | static struct net *macsec_get_link_net(const struct net_device *dev) | |
4190 | { | |
4191 | return dev_net(macsec_priv(dev)->real_dev); | |
4192 | } | |
4193 | ||
4194 | static size_t macsec_get_size(const struct net_device *dev) | |
4195 | { | |
c9fba3ed ZS |
4196 | return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */ |
4197 | nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */ | |
4198 | nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */ | |
4199 | nla_total_size(4) + /* IFLA_MACSEC_WINDOW */ | |
4200 | nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */ | |
4201 | nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */ | |
4202 | nla_total_size(1) + /* IFLA_MACSEC_PROTECT */ | |
4203 | nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */ | |
4204 | nla_total_size(1) + /* IFLA_MACSEC_ES */ | |
4205 | nla_total_size(1) + /* IFLA_MACSEC_SCB */ | |
4206 | nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */ | |
4207 | nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */ | |
c09440f7 SD |
4208 | 0; |
4209 | } | |
4210 | ||
4211 | static int macsec_fill_info(struct sk_buff *skb, | |
4212 | const struct net_device *dev) | |
4213 | { | |
4214 | struct macsec_secy *secy = &macsec_priv(dev)->secy; | |
4215 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ccfdec90 FW |
4216 | u64 csid; |
4217 | ||
4218 | switch (secy->key_len) { | |
4219 | case MACSEC_GCM_AES_128_SAK_LEN: | |
48ef50fa | 4220 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
4221 | break; |
4222 | case MACSEC_GCM_AES_256_SAK_LEN: | |
48ef50fa | 4223 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
ccfdec90 FW |
4224 | break; |
4225 | default: | |
4226 | goto nla_put_failure; | |
4227 | } | |
c09440f7 | 4228 | |
f60d94c0 ND |
4229 | if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
4230 | IFLA_MACSEC_PAD) || | |
c09440f7 | 4231 | nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
f60d94c0 | 4232 | nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
ccfdec90 | 4233 | csid, IFLA_MACSEC_PAD) || |
c09440f7 SD |
4234 | nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
4235 | nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || | |
4236 | nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || | |
4237 | nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || | |
4238 | nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || | |
4239 | nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || | |
4240 | nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || | |
4241 | nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || | |
4242 | 0) | |
4243 | goto nla_put_failure; | |
4244 | ||
4245 | if (secy->replay_protect) { | |
4246 | if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) | |
4247 | goto nla_put_failure; | |
4248 | } | |
4249 | ||
4250 | return 0; | |
4251 | ||
4252 | nla_put_failure: | |
4253 | return -EMSGSIZE; | |
4254 | } | |
4255 | ||
4256 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { | |
4257 | .kind = "macsec", | |
4258 | .priv_size = sizeof(struct macsec_dev), | |
4259 | .maxtype = IFLA_MACSEC_MAX, | |
4260 | .policy = macsec_rtnl_policy, | |
4261 | .setup = macsec_setup, | |
4262 | .validate = macsec_validate_attr, | |
4263 | .newlink = macsec_newlink, | |
4264 | .changelink = macsec_changelink, | |
4265 | .dellink = macsec_dellink, | |
4266 | .get_size = macsec_get_size, | |
4267 | .fill_info = macsec_fill_info, | |
4268 | .get_link_net = macsec_get_link_net, | |
4269 | }; | |
4270 | ||
4271 | static bool is_macsec_master(struct net_device *dev) | |
4272 | { | |
4273 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; | |
4274 | } | |
4275 | ||
4276 | static int macsec_notify(struct notifier_block *this, unsigned long event, | |
4277 | void *ptr) | |
4278 | { | |
4279 | struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); | |
4280 | LIST_HEAD(head); | |
4281 | ||
4282 | if (!is_macsec_master(real_dev)) | |
4283 | return NOTIFY_DONE; | |
4284 | ||
4285 | switch (event) { | |
e6ac0758 SD |
4286 | case NETDEV_DOWN: |
4287 | case NETDEV_UP: | |
4288 | case NETDEV_CHANGE: { | |
4289 | struct macsec_dev *m, *n; | |
4290 | struct macsec_rxh_data *rxd; | |
4291 | ||
4292 | rxd = macsec_data_rtnl(real_dev); | |
4293 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
4294 | struct net_device *dev = m->secy.netdev; | |
4295 | ||
4296 | netif_stacked_transfer_operstate(real_dev, dev); | |
4297 | } | |
4298 | break; | |
4299 | } | |
c09440f7 SD |
4300 | case NETDEV_UNREGISTER: { |
4301 | struct macsec_dev *m, *n; | |
4302 | struct macsec_rxh_data *rxd; | |
4303 | ||
4304 | rxd = macsec_data_rtnl(real_dev); | |
4305 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
bbe11fab | 4306 | macsec_common_dellink(m->secy.netdev, &head); |
c09440f7 | 4307 | } |
bbe11fab SD |
4308 | |
4309 | netdev_rx_handler_unregister(real_dev); | |
4310 | kfree(rxd); | |
4311 | ||
c09440f7 SD |
4312 | unregister_netdevice_many(&head); |
4313 | break; | |
4314 | } | |
4315 | case NETDEV_CHANGEMTU: { | |
4316 | struct macsec_dev *m; | |
4317 | struct macsec_rxh_data *rxd; | |
4318 | ||
4319 | rxd = macsec_data_rtnl(real_dev); | |
4320 | list_for_each_entry(m, &rxd->secys, secys) { | |
4321 | struct net_device *dev = m->secy.netdev; | |
4322 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + | |
4323 | macsec_extra_len(true)); | |
4324 | ||
4325 | if (dev->mtu > mtu) | |
4326 | dev_set_mtu(dev, mtu); | |
4327 | } | |
4328 | } | |
4329 | } | |
4330 | ||
4331 | return NOTIFY_OK; | |
4332 | } | |
4333 | ||
4334 | static struct notifier_block macsec_notifier = { | |
4335 | .notifier_call = macsec_notify, | |
4336 | }; | |
4337 | ||
4338 | static int __init macsec_init(void) | |
4339 | { | |
4340 | int err; | |
4341 | ||
4342 | pr_info("MACsec IEEE 802.1AE\n"); | |
4343 | err = register_netdevice_notifier(&macsec_notifier); | |
4344 | if (err) | |
4345 | return err; | |
4346 | ||
4347 | err = rtnl_link_register(&macsec_link_ops); | |
4348 | if (err) | |
4349 | goto notifier; | |
4350 | ||
489111e5 | 4351 | err = genl_register_family(&macsec_fam); |
c09440f7 SD |
4352 | if (err) |
4353 | goto rtnl; | |
4354 | ||
4355 | return 0; | |
4356 | ||
4357 | rtnl: | |
4358 | rtnl_link_unregister(&macsec_link_ops); | |
4359 | notifier: | |
4360 | unregister_netdevice_notifier(&macsec_notifier); | |
4361 | return err; | |
4362 | } | |
4363 | ||
4364 | static void __exit macsec_exit(void) | |
4365 | { | |
4366 | genl_unregister_family(&macsec_fam); | |
4367 | rtnl_link_unregister(&macsec_link_ops); | |
4368 | unregister_netdevice_notifier(&macsec_notifier); | |
b196c22a | 4369 | rcu_barrier(); |
c09440f7 SD |
4370 | } |
4371 | ||
4372 | module_init(macsec_init); | |
4373 | module_exit(macsec_exit); | |
4374 | ||
4375 | MODULE_ALIAS_RTNL_LINK("macsec"); | |
78362998 | 4376 | MODULE_ALIAS_GENL_FAMILY("macsec"); |
c09440f7 SD |
4377 | |
4378 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); | |
4379 | MODULE_LICENSE("GPL v2"); |