Commit | Line | Data |
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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> |
0a28bfd4 | 21 | #include <net/dst_metadata.h> |
3cf3227a | 22 | #include <linux/phy.h> |
a21ecf0e | 23 | #include <linux/byteorder/generic.h> |
b06d072c | 24 | #include <linux/if_arp.h> |
c09440f7 SD |
25 | |
26 | #include <uapi/linux/if_macsec.h> | |
27 | ||
c09440f7 SD |
28 | /* SecTAG length = macsec_eth_header without the optional SCI */ |
29 | #define MACSEC_TAG_LEN 6 | |
30 | ||
31 | struct macsec_eth_header { | |
32 | struct ethhdr eth; | |
33 | /* SecTAG */ | |
34 | u8 tci_an; | |
35 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
36 | u8 short_length:6, | |
37 | unused:2; | |
38 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
39 | u8 unused:2, | |
40 | short_length:6; | |
41 | #else | |
42 | #error "Please fix <asm/byteorder.h>" | |
43 | #endif | |
44 | __be32 packet_number; | |
45 | u8 secure_channel_id[8]; /* optional */ | |
46 | } __packed; | |
47 | ||
c09440f7 SD |
48 | /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */ |
49 | #define MIN_NON_SHORT_LEN 48 | |
50 | ||
51 | #define GCM_AES_IV_LEN 12 | |
c09440f7 | 52 | |
7979472b | 53 | #define for_each_rxsc(secy, sc) \ |
c09440f7 | 54 | for (sc = rcu_dereference_bh(secy->rx_sc); \ |
7979472b | 55 | sc; \ |
c09440f7 SD |
56 | sc = rcu_dereference_bh(sc->next)) |
57 | #define for_each_rxsc_rtnl(secy, sc) \ | |
58 | for (sc = rtnl_dereference(secy->rx_sc); \ | |
59 | sc; \ | |
60 | sc = rtnl_dereference(sc->next)) | |
61 | ||
a21ecf0e EM |
62 | #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31))) |
63 | ||
64 | struct gcm_iv_xpn { | |
65 | union { | |
66 | u8 short_secure_channel_id[4]; | |
67 | ssci_t ssci; | |
68 | }; | |
69 | __be64 pn; | |
70 | } __packed; | |
71 | ||
c09440f7 SD |
72 | struct gcm_iv { |
73 | union { | |
74 | u8 secure_channel_id[8]; | |
75 | sci_t sci; | |
76 | }; | |
77 | __be32 pn; | |
78 | }; | |
79 | ||
c09440f7 SD |
80 | #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT |
81 | ||
c09440f7 SD |
82 | struct pcpu_secy_stats { |
83 | struct macsec_dev_stats stats; | |
84 | struct u64_stats_sync syncp; | |
85 | }; | |
86 | ||
87 | /** | |
88 | * struct macsec_dev - private data | |
89 | * @secy: SecY config | |
90 | * @real_dev: pointer to underlying netdevice | |
196a888c | 91 | * @dev_tracker: refcount tracker for @real_dev reference |
c09440f7 SD |
92 | * @stats: MACsec device stats |
93 | * @secys: linked list of SecY's on the underlying device | |
ecdc5689 | 94 | * @gro_cells: pointer to the Generic Receive Offload cell |
3cf3227a | 95 | * @offload: status of offloading on the MACsec device |
a73d8779 RPNO |
96 | * @insert_tx_tag: when offloading, device requires to insert an |
97 | * additional tag | |
c09440f7 SD |
98 | */ |
99 | struct macsec_dev { | |
100 | struct macsec_secy secy; | |
101 | struct net_device *real_dev; | |
196a888c | 102 | netdevice_tracker dev_tracker; |
c09440f7 SD |
103 | struct pcpu_secy_stats __percpu *stats; |
104 | struct list_head secys; | |
5491e7c6 | 105 | struct gro_cells gro_cells; |
3cf3227a | 106 | enum macsec_offload offload; |
a73d8779 | 107 | bool insert_tx_tag; |
c09440f7 SD |
108 | }; |
109 | ||
110 | /** | |
111 | * struct macsec_rxh_data - rx_handler private argument | |
112 | * @secys: linked list of SecY's on this underlying device | |
113 | */ | |
114 | struct macsec_rxh_data { | |
115 | struct list_head secys; | |
116 | }; | |
117 | ||
118 | static struct macsec_dev *macsec_priv(const struct net_device *dev) | |
119 | { | |
120 | return (struct macsec_dev *)netdev_priv(dev); | |
121 | } | |
122 | ||
123 | static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) | |
124 | { | |
125 | return rcu_dereference_bh(dev->rx_handler_data); | |
126 | } | |
127 | ||
128 | static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) | |
129 | { | |
130 | return rtnl_dereference(dev->rx_handler_data); | |
131 | } | |
132 | ||
133 | struct macsec_cb { | |
134 | struct aead_request *req; | |
135 | union { | |
136 | struct macsec_tx_sa *tx_sa; | |
137 | struct macsec_rx_sa *rx_sa; | |
138 | }; | |
139 | u8 assoc_num; | |
140 | bool valid; | |
141 | bool has_sci; | |
142 | }; | |
143 | ||
144 | static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) | |
145 | { | |
146 | struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); | |
147 | ||
148 | if (!sa || !sa->active) | |
149 | return NULL; | |
150 | ||
e187246f | 151 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
152 | return NULL; |
153 | ||
154 | return sa; | |
155 | } | |
156 | ||
91ec9bd5 CY |
157 | static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc) |
158 | { | |
159 | struct macsec_rx_sa *sa = NULL; | |
160 | int an; | |
161 | ||
162 | for (an = 0; an < MACSEC_NUM_AN; an++) { | |
163 | sa = macsec_rxsa_get(rx_sc->sa[an]); | |
164 | if (sa) | |
165 | break; | |
166 | } | |
167 | return sa; | |
168 | } | |
169 | ||
c09440f7 SD |
170 | static void free_rx_sc_rcu(struct rcu_head *head) |
171 | { | |
172 | struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); | |
173 | ||
174 | free_percpu(rx_sc->stats); | |
175 | kfree(rx_sc); | |
176 | } | |
177 | ||
178 | static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) | |
179 | { | |
8676d76f | 180 | return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL; |
c09440f7 SD |
181 | } |
182 | ||
183 | static void macsec_rxsc_put(struct macsec_rx_sc *sc) | |
184 | { | |
8676d76f | 185 | if (refcount_dec_and_test(&sc->refcnt)) |
c09440f7 SD |
186 | call_rcu(&sc->rcu_head, free_rx_sc_rcu); |
187 | } | |
188 | ||
189 | static void free_rxsa(struct rcu_head *head) | |
190 | { | |
191 | struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); | |
192 | ||
193 | crypto_free_aead(sa->key.tfm); | |
194 | free_percpu(sa->stats); | |
c09440f7 SD |
195 | kfree(sa); |
196 | } | |
197 | ||
198 | static void macsec_rxsa_put(struct macsec_rx_sa *sa) | |
199 | { | |
e187246f | 200 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
201 | call_rcu(&sa->rcu, free_rxsa); |
202 | } | |
203 | ||
204 | static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) | |
205 | { | |
206 | struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); | |
207 | ||
208 | if (!sa || !sa->active) | |
209 | return NULL; | |
210 | ||
28206cdb | 211 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
212 | return NULL; |
213 | ||
214 | return sa; | |
215 | } | |
216 | ||
217 | static void free_txsa(struct rcu_head *head) | |
218 | { | |
219 | struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); | |
220 | ||
221 | crypto_free_aead(sa->key.tfm); | |
222 | free_percpu(sa->stats); | |
223 | kfree(sa); | |
224 | } | |
225 | ||
226 | static void macsec_txsa_put(struct macsec_tx_sa *sa) | |
227 | { | |
28206cdb | 228 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
229 | call_rcu(&sa->rcu, free_txsa); |
230 | } | |
231 | ||
232 | static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) | |
233 | { | |
234 | BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); | |
235 | return (struct macsec_cb *)skb->cb; | |
236 | } | |
237 | ||
c09440f7 SD |
238 | #define MACSEC_PORT_SCB (0x0000) |
239 | #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) | |
48ef50fa | 240 | #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff) |
c09440f7 | 241 | |
ccfdec90 FW |
242 | #define MACSEC_GCM_AES_128_SAK_LEN 16 |
243 | #define MACSEC_GCM_AES_256_SAK_LEN 32 | |
244 | ||
ccfdec90 | 245 | #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN |
48ef50fa | 246 | #define DEFAULT_XPN false |
c09440f7 SD |
247 | #define DEFAULT_SEND_SCI true |
248 | #define DEFAULT_ENCRYPT false | |
249 | #define DEFAULT_ENCODING_SA 0 | |
b07a0e20 | 250 | #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1)) |
c09440f7 | 251 | |
8bc7823e | 252 | static sci_t make_sci(const u8 *addr, __be16 port) |
c09440f7 SD |
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; | |
b1671253 | 316 | else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN) |
c09440f7 SD |
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 | ||
5c937de7 AT |
448 | static void __macsec_pn_wrapped(struct macsec_secy *secy, |
449 | struct macsec_tx_sa *tx_sa) | |
450 | { | |
451 | pr_debug("PN wrapped, transitioning to !oper\n"); | |
452 | tx_sa->active = false; | |
453 | if (secy->protect_frames) | |
454 | secy->operational = false; | |
455 | } | |
456 | ||
457 | void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa) | |
458 | { | |
459 | spin_lock_bh(&tx_sa->lock); | |
460 | __macsec_pn_wrapped(secy, tx_sa); | |
461 | spin_unlock_bh(&tx_sa->lock); | |
462 | } | |
463 | EXPORT_SYMBOL_GPL(macsec_pn_wrapped); | |
464 | ||
a21ecf0e EM |
465 | static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa, |
466 | struct macsec_secy *secy) | |
c09440f7 | 467 | { |
a21ecf0e | 468 | pn_t pn; |
c09440f7 SD |
469 | |
470 | spin_lock_bh(&tx_sa->lock); | |
c09440f7 | 471 | |
a21ecf0e EM |
472 | pn = tx_sa->next_pn_halves; |
473 | if (secy->xpn) | |
474 | tx_sa->next_pn++; | |
475 | else | |
476 | tx_sa->next_pn_halves.lower++; | |
477 | ||
5c937de7 AT |
478 | if (tx_sa->next_pn == 0) |
479 | __macsec_pn_wrapped(secy, tx_sa); | |
c09440f7 SD |
480 | spin_unlock_bh(&tx_sa->lock); |
481 | ||
482 | return pn; | |
483 | } | |
484 | ||
485 | static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) | |
486 | { | |
487 | struct macsec_dev *macsec = netdev_priv(dev); | |
488 | ||
489 | skb->dev = macsec->real_dev; | |
490 | skb_reset_mac_header(skb); | |
491 | skb->protocol = eth_hdr(skb)->h_proto; | |
492 | } | |
493 | ||
91ec9bd5 CY |
494 | static unsigned int macsec_msdu_len(struct sk_buff *skb) |
495 | { | |
496 | struct macsec_dev *macsec = macsec_priv(skb->dev); | |
497 | struct macsec_secy *secy = &macsec->secy; | |
498 | bool sci_present = macsec_skb_cb(skb)->has_sci; | |
499 | ||
500 | return skb->len - macsec_hdr_len(sci_present) - secy->icv_len; | |
501 | } | |
502 | ||
c09440f7 SD |
503 | static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, |
504 | struct macsec_tx_sa *tx_sa) | |
505 | { | |
91ec9bd5 | 506 | unsigned int msdu_len = macsec_msdu_len(skb); |
c09440f7 SD |
507 | struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); |
508 | ||
509 | u64_stats_update_begin(&txsc_stats->syncp); | |
510 | if (tx_sc->encrypt) { | |
91ec9bd5 | 511 | txsc_stats->stats.OutOctetsEncrypted += msdu_len; |
c09440f7 SD |
512 | txsc_stats->stats.OutPktsEncrypted++; |
513 | this_cpu_inc(tx_sa->stats->OutPktsEncrypted); | |
514 | } else { | |
91ec9bd5 | 515 | txsc_stats->stats.OutOctetsProtected += msdu_len; |
c09440f7 SD |
516 | txsc_stats->stats.OutPktsProtected++; |
517 | this_cpu_inc(tx_sa->stats->OutPktsProtected); | |
518 | } | |
519 | u64_stats_update_end(&txsc_stats->syncp); | |
520 | } | |
521 | ||
522 | static void count_tx(struct net_device *dev, int ret, int len) | |
523 | { | |
bf98bbe9 LZ |
524 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) |
525 | dev_sw_netstats_tx_add(dev, 1, len); | |
c09440f7 SD |
526 | } |
527 | ||
23b8b93b | 528 | static void macsec_encrypt_done(void *data, int err) |
c09440f7 | 529 | { |
23b8b93b | 530 | struct sk_buff *skb = data; |
c09440f7 SD |
531 | struct net_device *dev = skb->dev; |
532 | struct macsec_dev *macsec = macsec_priv(dev); | |
533 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; | |
534 | int len, ret; | |
535 | ||
536 | aead_request_free(macsec_skb_cb(skb)->req); | |
537 | ||
538 | rcu_read_lock_bh(); | |
c09440f7 | 539 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); |
91ec9bd5 CY |
540 | /* packet is encrypted/protected so tx_bytes must be calculated */ |
541 | len = macsec_msdu_len(skb) + 2 * ETH_ALEN; | |
542 | macsec_encrypt_finish(skb, dev); | |
c09440f7 SD |
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 | ||
3222bc99 RR |
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 | } | |
c09440f7 SD |
630 | } |
631 | ||
632 | unprotected_len = skb->len; | |
633 | eth = eth_hdr(skb); | |
b1671253 | 634 | sci_present = macsec_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; | |
91ec9bd5 | 701 | macsec_skb_cb(skb)->has_sci = sci_present; |
c09440f7 SD |
702 | aead_request_set_callback(req, 0, macsec_encrypt_done, skb); |
703 | ||
704 | dev_hold(skb->dev); | |
705 | ret = crypto_aead_encrypt(req); | |
706 | if (ret == -EINPROGRESS) { | |
707 | return ERR_PTR(ret); | |
708 | } else if (ret != 0) { | |
709 | dev_put(skb->dev); | |
710 | kfree_skb(skb); | |
711 | aead_request_free(req); | |
712 | macsec_txsa_put(tx_sa); | |
713 | return ERR_PTR(-EINVAL); | |
714 | } | |
715 | ||
716 | dev_put(skb->dev); | |
717 | aead_request_free(req); | |
718 | macsec_txsa_put(tx_sa); | |
719 | ||
720 | return skb; | |
721 | } | |
722 | ||
723 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) | |
724 | { | |
725 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
726 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); | |
727 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); | |
728 | u32 lowest_pn = 0; | |
729 | ||
730 | spin_lock(&rx_sa->lock); | |
a21ecf0e EM |
731 | if (rx_sa->next_pn_halves.lower >= secy->replay_window) |
732 | lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window; | |
c09440f7 SD |
733 | |
734 | /* Now perform replay protection check again | |
735 | * (see IEEE 802.1AE-2006 figure 10-5) | |
736 | */ | |
a21ecf0e EM |
737 | if (secy->replay_protect && pn < lowest_pn && |
738 | (!secy->xpn || pn_same_half(pn, lowest_pn))) { | |
c09440f7 SD |
739 | spin_unlock(&rx_sa->lock); |
740 | u64_stats_update_begin(&rxsc_stats->syncp); | |
741 | rxsc_stats->stats.InPktsLate++; | |
742 | u64_stats_update_end(&rxsc_stats->syncp); | |
32d0a49d | 743 | DEV_STATS_INC(secy->netdev, rx_dropped); |
c09440f7 SD |
744 | return false; |
745 | } | |
746 | ||
747 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { | |
91ec9bd5 | 748 | unsigned int msdu_len = macsec_msdu_len(skb); |
c09440f7 SD |
749 | u64_stats_update_begin(&rxsc_stats->syncp); |
750 | if (hdr->tci_an & MACSEC_TCI_E) | |
91ec9bd5 | 751 | rxsc_stats->stats.InOctetsDecrypted += msdu_len; |
c09440f7 | 752 | else |
91ec9bd5 | 753 | rxsc_stats->stats.InOctetsValidated += msdu_len; |
c09440f7 SD |
754 | u64_stats_update_end(&rxsc_stats->syncp); |
755 | } | |
756 | ||
757 | if (!macsec_skb_cb(skb)->valid) { | |
758 | spin_unlock(&rx_sa->lock); | |
759 | ||
760 | /* 10.6.5 */ | |
761 | if (hdr->tci_an & MACSEC_TCI_C || | |
762 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
763 | u64_stats_update_begin(&rxsc_stats->syncp); | |
764 | rxsc_stats->stats.InPktsNotValid++; | |
765 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 | 766 | this_cpu_inc(rx_sa->stats->InPktsNotValid); |
32d0a49d | 767 | DEV_STATS_INC(secy->netdev, rx_errors); |
c09440f7 SD |
768 | return false; |
769 | } | |
770 | ||
771 | u64_stats_update_begin(&rxsc_stats->syncp); | |
772 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { | |
773 | rxsc_stats->stats.InPktsInvalid++; | |
774 | this_cpu_inc(rx_sa->stats->InPktsInvalid); | |
775 | } else if (pn < lowest_pn) { | |
776 | rxsc_stats->stats.InPktsDelayed++; | |
777 | } else { | |
778 | rxsc_stats->stats.InPktsUnchecked++; | |
779 | } | |
780 | u64_stats_update_end(&rxsc_stats->syncp); | |
781 | } else { | |
782 | u64_stats_update_begin(&rxsc_stats->syncp); | |
783 | if (pn < lowest_pn) { | |
784 | rxsc_stats->stats.InPktsDelayed++; | |
785 | } else { | |
786 | rxsc_stats->stats.InPktsOK++; | |
787 | this_cpu_inc(rx_sa->stats->InPktsOK); | |
788 | } | |
789 | u64_stats_update_end(&rxsc_stats->syncp); | |
790 | ||
a21ecf0e EM |
791 | // Instead of "pn >=" - to support pn overflow in xpn |
792 | if (pn + 1 > rx_sa->next_pn_halves.lower) { | |
793 | rx_sa->next_pn_halves.lower = pn + 1; | |
794 | } else if (secy->xpn && | |
795 | !pn_same_half(pn, rx_sa->next_pn_halves.lower)) { | |
796 | rx_sa->next_pn_halves.upper++; | |
797 | rx_sa->next_pn_halves.lower = pn + 1; | |
798 | } | |
799 | ||
c09440f7 SD |
800 | spin_unlock(&rx_sa->lock); |
801 | } | |
802 | ||
803 | return true; | |
804 | } | |
805 | ||
806 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) | |
807 | { | |
808 | skb->pkt_type = PACKET_HOST; | |
809 | skb->protocol = eth_type_trans(skb, dev); | |
810 | ||
811 | skb_reset_network_header(skb); | |
812 | if (!skb_transport_header_was_set(skb)) | |
813 | skb_reset_transport_header(skb); | |
814 | skb_reset_mac_len(skb); | |
815 | } | |
816 | ||
817 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) | |
818 | { | |
7d8b16b9 | 819 | skb->ip_summed = CHECKSUM_NONE; |
c09440f7 SD |
820 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); |
821 | skb_pull(skb, hdr_len); | |
822 | pskb_trim_unique(skb, skb->len - icv_len); | |
823 | } | |
824 | ||
825 | static void count_rx(struct net_device *dev, int len) | |
826 | { | |
bf98bbe9 | 827 | dev_sw_netstats_rx_add(dev, len); |
c09440f7 SD |
828 | } |
829 | ||
23b8b93b | 830 | static void macsec_decrypt_done(void *data, int err) |
c09440f7 | 831 | { |
23b8b93b | 832 | struct sk_buff *skb = data; |
c09440f7 SD |
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)); | |
91ec9bd5 | 855 | len = skb->len; |
c09440f7 SD |
856 | macsec_reset_skb(skb, macsec->secy.netdev); |
857 | ||
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); |
860ead89 | 999 | struct metadata_dst *md_dst; |
c09440f7 SD |
1000 | struct macsec_rxh_data *rxd; |
1001 | struct macsec_dev *macsec; | |
1002 | ||
1003 | rcu_read_lock(); | |
1004 | rxd = macsec_data_rcu(skb->dev); | |
860ead89 | 1005 | md_dst = skb_metadata_dst(skb); |
c09440f7 | 1006 | |
c09440f7 SD |
1007 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
1008 | struct sk_buff *nskb; | |
c09440f7 | 1009 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
f428011b MS |
1010 | struct net_device *ndev = macsec->secy.netdev; |
1011 | ||
1012 | /* If h/w offloading is enabled, HW decodes frames and strips | |
1013 | * the SecTAG, so we have to deduce which port to deliver to. | |
1014 | */ | |
1015 | if (macsec_is_offloaded(macsec) && netif_running(ndev)) { | |
7661351a EH |
1016 | struct macsec_rx_sc *rx_sc = NULL; |
1017 | ||
1018 | if (md_dst && md_dst->type == METADATA_MACSEC) | |
1019 | rx_sc = find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci); | |
1020 | ||
1021 | if (md_dst && md_dst->type == METADATA_MACSEC && !rx_sc) | |
860ead89 LN |
1022 | continue; |
1023 | ||
f428011b MS |
1024 | if (ether_addr_equal_64bits(hdr->h_dest, |
1025 | ndev->dev_addr)) { | |
1026 | /* exact match, divert skb to this port */ | |
1027 | skb->dev = ndev; | |
1028 | skb->pkt_type = PACKET_HOST; | |
1029 | ret = RX_HANDLER_ANOTHER; | |
1030 | goto out; | |
1031 | } else if (is_multicast_ether_addr_64bits( | |
1032 | hdr->h_dest)) { | |
1033 | /* multicast frame, deliver on this port too */ | |
1034 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1035 | if (!nskb) | |
1036 | break; | |
1037 | ||
1038 | nskb->dev = ndev; | |
1039 | if (ether_addr_equal_64bits(hdr->h_dest, | |
1040 | ndev->broadcast)) | |
1041 | nskb->pkt_type = PACKET_BROADCAST; | |
1042 | else | |
1043 | nskb->pkt_type = PACKET_MULTICAST; | |
1044 | ||
baebdf48 | 1045 | __netif_rx(nskb); |
7661351a EH |
1046 | } else if (rx_sc || ndev->flags & IFF_PROMISC) { |
1047 | skb->dev = ndev; | |
1048 | skb->pkt_type = PACKET_HOST; | |
1049 | ret = RX_HANDLER_ANOTHER; | |
1050 | goto out; | |
f428011b | 1051 | } |
7661351a | 1052 | |
f428011b MS |
1053 | continue; |
1054 | } | |
c09440f7 | 1055 | |
f428011b MS |
1056 | /* 10.6 If the management control validateFrames is not |
1057 | * Strict, frames without a SecTAG are received, counted, and | |
1058 | * delivered to the Controlled Port | |
1059 | */ | |
1060 | if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
c09440f7 SD |
1061 | u64_stats_update_begin(&secy_stats->syncp); |
1062 | secy_stats->stats.InPktsNoTag++; | |
1063 | u64_stats_update_end(&secy_stats->syncp); | |
32d0a49d | 1064 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
c09440f7 SD |
1065 | continue; |
1066 | } | |
1067 | ||
1068 | /* deliver on this port */ | |
1069 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1070 | if (!nskb) | |
1071 | break; | |
1072 | ||
f428011b | 1073 | nskb->dev = ndev; |
c09440f7 | 1074 | |
baebdf48 | 1075 | if (__netif_rx(nskb) == NET_RX_SUCCESS) { |
c09440f7 SD |
1076 | u64_stats_update_begin(&secy_stats->syncp); |
1077 | secy_stats->stats.InPktsUntagged++; | |
1078 | u64_stats_update_end(&secy_stats->syncp); | |
c09440f7 SD |
1079 | } |
1080 | } | |
1081 | ||
3cf3227a | 1082 | out: |
c09440f7 | 1083 | rcu_read_unlock(); |
3cf3227a | 1084 | return ret; |
c09440f7 SD |
1085 | } |
1086 | ||
1087 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) | |
1088 | { | |
1089 | struct sk_buff *skb = *pskb; | |
1090 | struct net_device *dev = skb->dev; | |
1091 | struct macsec_eth_header *hdr; | |
1092 | struct macsec_secy *secy = NULL; | |
1093 | struct macsec_rx_sc *rx_sc; | |
1094 | struct macsec_rx_sa *rx_sa; | |
1095 | struct macsec_rxh_data *rxd; | |
1096 | struct macsec_dev *macsec; | |
c7cc9200 | 1097 | unsigned int len; |
c09440f7 | 1098 | sci_t sci; |
a21ecf0e | 1099 | u32 hdr_pn; |
c09440f7 SD |
1100 | bool cbit; |
1101 | struct pcpu_rx_sc_stats *rxsc_stats; | |
1102 | struct pcpu_secy_stats *secy_stats; | |
1103 | bool pulled_sci; | |
5491e7c6 | 1104 | int ret; |
c09440f7 SD |
1105 | |
1106 | if (skb_headroom(skb) < ETH_HLEN) | |
1107 | goto drop_direct; | |
1108 | ||
1109 | hdr = macsec_ethhdr(skb); | |
3cf3227a AT |
1110 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) |
1111 | return handle_not_macsec(skb); | |
c09440f7 SD |
1112 | |
1113 | skb = skb_unshare(skb, GFP_ATOMIC); | |
095c02da AS |
1114 | *pskb = skb; |
1115 | if (!skb) | |
c09440f7 | 1116 | return RX_HANDLER_CONSUMED; |
c09440f7 SD |
1117 | |
1118 | pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); | |
1119 | if (!pulled_sci) { | |
1120 | if (!pskb_may_pull(skb, macsec_extra_len(false))) | |
1121 | goto drop_direct; | |
1122 | } | |
1123 | ||
1124 | hdr = macsec_ethhdr(skb); | |
1125 | ||
1126 | /* Frames with a SecTAG that has the TCI E bit set but the C | |
1127 | * bit clear are discarded, as this reserved encoding is used | |
1128 | * to identify frames with a SecTAG that are not to be | |
1129 | * delivered to the Controlled Port. | |
1130 | */ | |
1131 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) | |
1132 | return RX_HANDLER_PASS; | |
1133 | ||
1134 | /* now, pull the extra length */ | |
1135 | if (hdr->tci_an & MACSEC_TCI_SC) { | |
1136 | if (!pulled_sci) | |
1137 | goto drop_direct; | |
1138 | } | |
1139 | ||
1140 | /* ethernet header is part of crypto processing */ | |
1141 | skb_push(skb, ETH_HLEN); | |
1142 | ||
1143 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); | |
1144 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; | |
1145 | sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); | |
1146 | ||
1147 | rcu_read_lock(); | |
1148 | rxd = macsec_data_rcu(skb->dev); | |
1149 | ||
1150 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1151 | struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); | |
7979472b | 1152 | |
c78ebe1d | 1153 | sc = sc ? macsec_rxsc_get(sc) : NULL; |
c09440f7 SD |
1154 | |
1155 | if (sc) { | |
1156 | secy = &macsec->secy; | |
1157 | rx_sc = sc; | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | if (!secy) | |
1163 | goto nosci; | |
1164 | ||
1165 | dev = secy->netdev; | |
1166 | macsec = macsec_priv(dev); | |
1167 | secy_stats = this_cpu_ptr(macsec->stats); | |
1168 | rxsc_stats = this_cpu_ptr(rx_sc->stats); | |
1169 | ||
a21ecf0e | 1170 | if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) { |
c09440f7 SD |
1171 | u64_stats_update_begin(&secy_stats->syncp); |
1172 | secy_stats->stats.InPktsBadTag++; | |
1173 | u64_stats_update_end(&secy_stats->syncp); | |
32d0a49d | 1174 | DEV_STATS_INC(secy->netdev, rx_errors); |
c09440f7 SD |
1175 | goto drop_nosa; |
1176 | } | |
1177 | ||
1178 | rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); | |
1179 | if (!rx_sa) { | |
1180 | /* 10.6.1 if the SA is not in use */ | |
1181 | ||
1182 | /* If validateFrames is Strict or the C bit in the | |
1183 | * SecTAG is set, discard | |
1184 | */ | |
91ec9bd5 | 1185 | struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc); |
c09440f7 SD |
1186 | if (hdr->tci_an & MACSEC_TCI_C || |
1187 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
1188 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1189 | rxsc_stats->stats.InPktsNotUsingSA++; | |
1190 | u64_stats_update_end(&rxsc_stats->syncp); | |
32d0a49d | 1191 | DEV_STATS_INC(secy->netdev, rx_errors); |
91ec9bd5 CY |
1192 | if (active_rx_sa) |
1193 | this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA); | |
c09440f7 SD |
1194 | goto drop_nosa; |
1195 | } | |
1196 | ||
1197 | /* not Strict, the frame (with the SecTAG and ICV | |
1198 | * removed) is delivered to the Controlled Port. | |
1199 | */ | |
1200 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1201 | rxsc_stats->stats.InPktsUnusedSA++; | |
1202 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 CY |
1203 | if (active_rx_sa) |
1204 | this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA); | |
c09440f7 SD |
1205 | goto deliver; |
1206 | } | |
1207 | ||
1208 | /* First, PN check to avoid decrypting obviously wrong packets */ | |
a21ecf0e | 1209 | hdr_pn = ntohl(hdr->packet_number); |
c09440f7 SD |
1210 | if (secy->replay_protect) { |
1211 | bool late; | |
1212 | ||
1213 | spin_lock(&rx_sa->lock); | |
a21ecf0e EM |
1214 | late = rx_sa->next_pn_halves.lower >= secy->replay_window && |
1215 | hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window); | |
1216 | ||
1217 | if (secy->xpn) | |
1218 | late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn); | |
c09440f7 SD |
1219 | spin_unlock(&rx_sa->lock); |
1220 | ||
1221 | if (late) { | |
1222 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1223 | rxsc_stats->stats.InPktsLate++; | |
1224 | u64_stats_update_end(&rxsc_stats->syncp); | |
32d0a49d | 1225 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
c09440f7 SD |
1226 | goto drop; |
1227 | } | |
1228 | } | |
1229 | ||
e3a3b626 BG |
1230 | macsec_skb_cb(skb)->rx_sa = rx_sa; |
1231 | ||
c09440f7 SD |
1232 | /* Disabled && !changed text => skip validation */ |
1233 | if (hdr->tci_an & MACSEC_TCI_C || | |
1234 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) | |
1235 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); | |
1236 | ||
c3b7d0bd SD |
1237 | if (IS_ERR(skb)) { |
1238 | /* the decrypt callback needs the reference */ | |
c78ebe1d | 1239 | if (PTR_ERR(skb) != -EINPROGRESS) { |
c3b7d0bd | 1240 | macsec_rxsa_put(rx_sa); |
c78ebe1d SD |
1241 | macsec_rxsc_put(rx_sc); |
1242 | } | |
c09440f7 SD |
1243 | rcu_read_unlock(); |
1244 | *pskb = NULL; | |
1245 | return RX_HANDLER_CONSUMED; | |
1246 | } | |
1247 | ||
a21ecf0e | 1248 | if (!macsec_post_decrypt(skb, secy, hdr_pn)) |
c09440f7 SD |
1249 | goto drop; |
1250 | ||
1251 | deliver: | |
1252 | macsec_finalize_skb(skb, secy->icv_len, | |
1253 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
91ec9bd5 | 1254 | len = skb->len; |
c09440f7 SD |
1255 | macsec_reset_skb(skb, secy->netdev); |
1256 | ||
497f358a SD |
1257 | if (rx_sa) |
1258 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 1259 | macsec_rxsc_put(rx_sc); |
5491e7c6 | 1260 | |
ba56d8ce | 1261 | skb_orphan(skb); |
5491e7c6 PA |
1262 | ret = gro_cells_receive(&macsec->gro_cells, skb); |
1263 | if (ret == NET_RX_SUCCESS) | |
c7cc9200 | 1264 | count_rx(dev, len); |
5491e7c6 | 1265 | else |
32d0a49d | 1266 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
c09440f7 SD |
1267 | |
1268 | rcu_read_unlock(); | |
1269 | ||
5491e7c6 PA |
1270 | *pskb = NULL; |
1271 | return RX_HANDLER_CONSUMED; | |
c09440f7 SD |
1272 | |
1273 | drop: | |
1274 | macsec_rxsa_put(rx_sa); | |
1275 | drop_nosa: | |
c78ebe1d | 1276 | macsec_rxsc_put(rx_sc); |
c09440f7 SD |
1277 | rcu_read_unlock(); |
1278 | drop_direct: | |
1279 | kfree_skb(skb); | |
1280 | *pskb = NULL; | |
1281 | return RX_HANDLER_CONSUMED; | |
1282 | ||
1283 | nosci: | |
1284 | /* 10.6.1 if the SC is not found */ | |
1285 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); | |
1286 | if (!cbit) | |
b1671253 | 1287 | macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN, |
c09440f7 SD |
1288 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); |
1289 | ||
1290 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1291 | struct sk_buff *nskb; | |
c09440f7 SD |
1292 | |
1293 | secy_stats = this_cpu_ptr(macsec->stats); | |
1294 | ||
1295 | /* If validateFrames is Strict or the C bit in the | |
1296 | * SecTAG is set, discard | |
1297 | */ | |
1298 | if (cbit || | |
1299 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1300 | u64_stats_update_begin(&secy_stats->syncp); | |
1301 | secy_stats->stats.InPktsNoSCI++; | |
1302 | u64_stats_update_end(&secy_stats->syncp); | |
32d0a49d | 1303 | DEV_STATS_INC(macsec->secy.netdev, rx_errors); |
c09440f7 SD |
1304 | continue; |
1305 | } | |
1306 | ||
1307 | /* not strict, the frame (with the SecTAG and ICV | |
1308 | * removed) is delivered to the Controlled Port. | |
1309 | */ | |
1310 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1311 | if (!nskb) | |
1312 | break; | |
1313 | ||
1314 | macsec_reset_skb(nskb, macsec->secy.netdev); | |
1315 | ||
baebdf48 | 1316 | ret = __netif_rx(nskb); |
c09440f7 SD |
1317 | if (ret == NET_RX_SUCCESS) { |
1318 | u64_stats_update_begin(&secy_stats->syncp); | |
1319 | secy_stats->stats.InPktsUnknownSCI++; | |
1320 | u64_stats_update_end(&secy_stats->syncp); | |
1321 | } else { | |
32d0a49d | 1322 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
c09440f7 SD |
1323 | } |
1324 | } | |
1325 | ||
1326 | rcu_read_unlock(); | |
1327 | *pskb = skb; | |
1328 | return RX_HANDLER_PASS; | |
1329 | } | |
1330 | ||
1331 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) | |
1332 | { | |
1333 | struct crypto_aead *tfm; | |
1334 | int ret; | |
1335 | ||
d3287e40 | 1336 | tfm = crypto_alloc_aead("gcm(aes)", 0, 0); |
34aedfee DC |
1337 | |
1338 | if (IS_ERR(tfm)) | |
1339 | return tfm; | |
c09440f7 SD |
1340 | |
1341 | ret = crypto_aead_setkey(tfm, key, key_len); | |
34aedfee DC |
1342 | if (ret < 0) |
1343 | goto fail; | |
c09440f7 SD |
1344 | |
1345 | ret = crypto_aead_setauthsize(tfm, icv_len); | |
34aedfee DC |
1346 | if (ret < 0) |
1347 | goto fail; | |
c09440f7 SD |
1348 | |
1349 | return tfm; | |
34aedfee DC |
1350 | fail: |
1351 | crypto_free_aead(tfm); | |
1352 | return ERR_PTR(ret); | |
c09440f7 SD |
1353 | } |
1354 | ||
1355 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, | |
1356 | int icv_len) | |
1357 | { | |
1358 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); | |
1359 | if (!rx_sa->stats) | |
34aedfee | 1360 | return -ENOMEM; |
c09440f7 SD |
1361 | |
1362 | rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1363 | if (IS_ERR(rx_sa->key.tfm)) { |
c09440f7 | 1364 | free_percpu(rx_sa->stats); |
34aedfee | 1365 | return PTR_ERR(rx_sa->key.tfm); |
c09440f7 SD |
1366 | } |
1367 | ||
48ef50fa | 1368 | rx_sa->ssci = MACSEC_UNDEF_SSCI; |
c09440f7 SD |
1369 | rx_sa->active = false; |
1370 | rx_sa->next_pn = 1; | |
e187246f | 1371 | refcount_set(&rx_sa->refcnt, 1); |
c09440f7 SD |
1372 | spin_lock_init(&rx_sa->lock); |
1373 | ||
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) | |
1378 | { | |
1379 | rx_sa->active = false; | |
1380 | ||
1381 | macsec_rxsa_put(rx_sa); | |
1382 | } | |
1383 | ||
1384 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) | |
1385 | { | |
1386 | int i; | |
1387 | ||
1388 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
1389 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); | |
1390 | ||
1391 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); | |
1392 | if (sa) | |
1393 | clear_rx_sa(sa); | |
1394 | } | |
1395 | ||
1396 | macsec_rxsc_put(rx_sc); | |
1397 | } | |
1398 | ||
1399 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1400 | { | |
1401 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; | |
1402 | ||
1403 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); | |
1404 | rx_sc; | |
1405 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { | |
1406 | if (rx_sc->sci == sci) { | |
1407 | if (rx_sc->active) | |
1408 | secy->n_rx_sc--; | |
1409 | rcu_assign_pointer(*rx_scp, rx_sc->next); | |
1410 | return rx_sc; | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | return NULL; | |
1415 | } | |
1416 | ||
73a4b31c SD |
1417 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci, |
1418 | bool active) | |
c09440f7 SD |
1419 | { |
1420 | struct macsec_rx_sc *rx_sc; | |
1421 | struct macsec_dev *macsec; | |
1422 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
1423 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
1424 | struct macsec_secy *secy; | |
1425 | ||
1426 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
1427 | if (find_rx_sc_rtnl(&macsec->secy, sci)) | |
1428 | return ERR_PTR(-EEXIST); | |
1429 | } | |
1430 | ||
1431 | rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); | |
1432 | if (!rx_sc) | |
1433 | return ERR_PTR(-ENOMEM); | |
1434 | ||
1435 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); | |
1436 | if (!rx_sc->stats) { | |
1437 | kfree(rx_sc); | |
1438 | return ERR_PTR(-ENOMEM); | |
1439 | } | |
1440 | ||
1441 | rx_sc->sci = sci; | |
73a4b31c | 1442 | rx_sc->active = active; |
8676d76f | 1443 | refcount_set(&rx_sc->refcnt, 1); |
c09440f7 SD |
1444 | |
1445 | secy = &macsec_priv(dev)->secy; | |
1446 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); | |
1447 | rcu_assign_pointer(secy->rx_sc, rx_sc); | |
1448 | ||
1449 | if (rx_sc->active) | |
1450 | secy->n_rx_sc++; | |
1451 | ||
1452 | return rx_sc; | |
1453 | } | |
1454 | ||
1455 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, | |
1456 | int icv_len) | |
1457 | { | |
1458 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); | |
1459 | if (!tx_sa->stats) | |
34aedfee | 1460 | return -ENOMEM; |
c09440f7 SD |
1461 | |
1462 | tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1463 | if (IS_ERR(tx_sa->key.tfm)) { |
c09440f7 | 1464 | free_percpu(tx_sa->stats); |
34aedfee | 1465 | return PTR_ERR(tx_sa->key.tfm); |
c09440f7 SD |
1466 | } |
1467 | ||
48ef50fa | 1468 | tx_sa->ssci = MACSEC_UNDEF_SSCI; |
c09440f7 | 1469 | tx_sa->active = false; |
28206cdb | 1470 | refcount_set(&tx_sa->refcnt, 1); |
c09440f7 SD |
1471 | spin_lock_init(&tx_sa->lock); |
1472 | ||
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) | |
1477 | { | |
1478 | tx_sa->active = false; | |
1479 | ||
1480 | macsec_txsa_put(tx_sa); | |
1481 | } | |
1482 | ||
489111e5 | 1483 | static struct genl_family macsec_fam; |
c09440f7 SD |
1484 | |
1485 | static struct net_device *get_dev_from_nl(struct net *net, | |
1486 | struct nlattr **attrs) | |
1487 | { | |
1488 | int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); | |
1489 | struct net_device *dev; | |
1490 | ||
1491 | dev = __dev_get_by_index(net, ifindex); | |
1492 | if (!dev) | |
1493 | return ERR_PTR(-ENODEV); | |
1494 | ||
1495 | if (!netif_is_macsec(dev)) | |
1496 | return ERR_PTR(-ENODEV); | |
1497 | ||
1498 | return dev; | |
1499 | } | |
1500 | ||
791bb3fc MS |
1501 | static enum macsec_offload nla_get_offload(const struct nlattr *nla) |
1502 | { | |
1503 | return (__force enum macsec_offload)nla_get_u8(nla); | |
1504 | } | |
1505 | ||
c09440f7 SD |
1506 | static sci_t nla_get_sci(const struct nlattr *nla) |
1507 | { | |
1508 | return (__force sci_t)nla_get_u64(nla); | |
1509 | } | |
1510 | ||
f60d94c0 ND |
1511 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1512 | int padattr) | |
c09440f7 | 1513 | { |
f60d94c0 | 1514 | return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
c09440f7 SD |
1515 | } |
1516 | ||
48ef50fa EM |
1517 | static ssci_t nla_get_ssci(const struct nlattr *nla) |
1518 | { | |
1519 | return (__force ssci_t)nla_get_u32(nla); | |
1520 | } | |
1521 | ||
1522 | static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value) | |
1523 | { | |
1524 | return nla_put_u32(skb, attrtype, (__force u64)value); | |
1525 | } | |
1526 | ||
c09440f7 SD |
1527 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, |
1528 | struct nlattr **attrs, | |
1529 | struct nlattr **tb_sa, | |
1530 | struct net_device **devp, | |
1531 | struct macsec_secy **secyp, | |
1532 | struct macsec_tx_sc **scp, | |
1533 | u8 *assoc_num) | |
1534 | { | |
1535 | struct net_device *dev; | |
1536 | struct macsec_secy *secy; | |
1537 | struct macsec_tx_sc *tx_sc; | |
1538 | struct macsec_tx_sa *tx_sa; | |
1539 | ||
1540 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1541 | return ERR_PTR(-EINVAL); | |
1542 | ||
1543 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1544 | ||
1545 | dev = get_dev_from_nl(net, attrs); | |
1546 | if (IS_ERR(dev)) | |
1547 | return ERR_CAST(dev); | |
1548 | ||
1549 | if (*assoc_num >= MACSEC_NUM_AN) | |
1550 | return ERR_PTR(-EINVAL); | |
1551 | ||
1552 | secy = &macsec_priv(dev)->secy; | |
1553 | tx_sc = &secy->tx_sc; | |
1554 | ||
1555 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); | |
1556 | if (!tx_sa) | |
1557 | return ERR_PTR(-ENODEV); | |
1558 | ||
1559 | *devp = dev; | |
1560 | *scp = tx_sc; | |
1561 | *secyp = secy; | |
1562 | return tx_sa; | |
1563 | } | |
1564 | ||
1565 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, | |
1566 | struct nlattr **attrs, | |
1567 | struct nlattr **tb_rxsc, | |
1568 | struct net_device **devp, | |
1569 | struct macsec_secy **secyp) | |
1570 | { | |
1571 | struct net_device *dev; | |
1572 | struct macsec_secy *secy; | |
1573 | struct macsec_rx_sc *rx_sc; | |
1574 | sci_t sci; | |
1575 | ||
1576 | dev = get_dev_from_nl(net, attrs); | |
1577 | if (IS_ERR(dev)) | |
1578 | return ERR_CAST(dev); | |
1579 | ||
1580 | secy = &macsec_priv(dev)->secy; | |
1581 | ||
1582 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1583 | return ERR_PTR(-EINVAL); | |
1584 | ||
1585 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1586 | rx_sc = find_rx_sc_rtnl(secy, sci); | |
1587 | if (!rx_sc) | |
1588 | return ERR_PTR(-ENODEV); | |
1589 | ||
1590 | *secyp = secy; | |
1591 | *devp = dev; | |
1592 | ||
1593 | return rx_sc; | |
1594 | } | |
1595 | ||
1596 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, | |
1597 | struct nlattr **attrs, | |
1598 | struct nlattr **tb_rxsc, | |
1599 | struct nlattr **tb_sa, | |
1600 | struct net_device **devp, | |
1601 | struct macsec_secy **secyp, | |
1602 | struct macsec_rx_sc **scp, | |
1603 | u8 *assoc_num) | |
1604 | { | |
1605 | struct macsec_rx_sc *rx_sc; | |
1606 | struct macsec_rx_sa *rx_sa; | |
1607 | ||
1608 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1609 | return ERR_PTR(-EINVAL); | |
1610 | ||
1611 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1612 | if (*assoc_num >= MACSEC_NUM_AN) | |
1613 | return ERR_PTR(-EINVAL); | |
1614 | ||
1615 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); | |
1616 | if (IS_ERR(rx_sc)) | |
1617 | return ERR_CAST(rx_sc); | |
1618 | ||
1619 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); | |
1620 | if (!rx_sa) | |
1621 | return ERR_PTR(-ENODEV); | |
1622 | ||
1623 | *scp = rx_sc; | |
1624 | return rx_sa; | |
1625 | } | |
1626 | ||
c09440f7 SD |
1627 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { |
1628 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
1629 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, | |
1630 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, | |
dcb780fb | 1631 | [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED }, |
c09440f7 SD |
1632 | }; |
1633 | ||
1634 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { | |
1635 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, | |
1636 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1637 | }; | |
1638 | ||
1639 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { | |
1640 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, | |
1641 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
bc043585 | 1642 | [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4), |
8acca6ac SD |
1643 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1644 | .len = MACSEC_KEYID_LEN, }, | |
c09440f7 | 1645 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
e8660ded | 1646 | .len = MACSEC_MAX_KEY_LEN, }, |
48ef50fa EM |
1647 | [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 }, |
1648 | [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY, | |
1649 | .len = MACSEC_SALT_LEN, }, | |
c09440f7 SD |
1650 | }; |
1651 | ||
dcb780fb AT |
1652 | static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = { |
1653 | [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 }, | |
1654 | }; | |
1655 | ||
3cf3227a AT |
1656 | /* Offloads an operation to a device driver */ |
1657 | static int macsec_offload(int (* const func)(struct macsec_context *), | |
1658 | struct macsec_context *ctx) | |
1659 | { | |
1660 | int ret; | |
1661 | ||
1662 | if (unlikely(!func)) | |
1663 | return 0; | |
1664 | ||
1665 | if (ctx->offload == MACSEC_OFFLOAD_PHY) | |
1666 | mutex_lock(&ctx->phydev->lock); | |
1667 | ||
3cf3227a | 1668 | ret = (*func)(ctx); |
3cf3227a | 1669 | |
3cf3227a AT |
1670 | if (ctx->offload == MACSEC_OFFLOAD_PHY) |
1671 | mutex_unlock(&ctx->phydev->lock); | |
1672 | ||
1673 | return ret; | |
1674 | } | |
1675 | ||
c09440f7 SD |
1676 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) |
1677 | { | |
1678 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) | |
1679 | return -EINVAL; | |
1680 | ||
8cb08174 | 1681 | if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL)) |
c09440f7 SD |
1682 | return -EINVAL; |
1683 | ||
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) | |
1688 | { | |
1689 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) | |
1690 | return -EINVAL; | |
1691 | ||
8cb08174 | 1692 | if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL)) |
c09440f7 SD |
1693 | return -EINVAL; |
1694 | ||
1695 | return 0; | |
1696 | } | |
1697 | ||
1698 | static bool validate_add_rxsa(struct nlattr **attrs) | |
1699 | { | |
1700 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1701 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1702 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1703 | return false; | |
1704 | ||
1705 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1706 | return false; | |
1707 | ||
48ef50fa | 1708 | if (attrs[MACSEC_SA_ATTR_PN] && |
c630d1fe | 1709 | nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
1710 | return false; |
1711 | ||
1712 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1713 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1714 | return false; | |
1715 | } | |
1716 | ||
8acca6ac SD |
1717 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1718 | return false; | |
1719 | ||
c09440f7 SD |
1720 | return true; |
1721 | } | |
1722 | ||
1723 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1724 | { | |
1725 | struct net_device *dev; | |
1726 | struct nlattr **attrs = info->attrs; | |
1727 | struct macsec_secy *secy; | |
1728 | struct macsec_rx_sc *rx_sc; | |
1729 | struct macsec_rx_sa *rx_sa; | |
1730 | unsigned char assoc_num; | |
48ef50fa | 1731 | int pn_len; |
c09440f7 SD |
1732 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
1733 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1734 | int err; |
c09440f7 SD |
1735 | |
1736 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1737 | return -EINVAL; | |
1738 | ||
1739 | if (parse_sa_config(attrs, tb_sa)) | |
1740 | return -EINVAL; | |
1741 | ||
1742 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1743 | return -EINVAL; | |
1744 | ||
1745 | if (!validate_add_rxsa(tb_sa)) | |
1746 | return -EINVAL; | |
1747 | ||
1748 | rtnl_lock(); | |
1749 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
36b232c8 | 1750 | if (IS_ERR(rx_sc)) { |
c09440f7 SD |
1751 | rtnl_unlock(); |
1752 | return PTR_ERR(rx_sc); | |
1753 | } | |
1754 | ||
1755 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1756 | ||
1757 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1758 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", | |
1759 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1760 | rtnl_unlock(); | |
1761 | return -EINVAL; | |
1762 | } | |
1763 | ||
48ef50fa | 1764 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
f46040ee SD |
1765 | if (tb_sa[MACSEC_SA_ATTR_PN] && |
1766 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
48ef50fa EM |
1767 | pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n", |
1768 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
1769 | rtnl_unlock(); | |
1770 | return -EINVAL; | |
1771 | } | |
1772 | ||
1773 | if (secy->xpn) { | |
1774 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { | |
1775 | rtnl_unlock(); | |
1776 | return -EINVAL; | |
1777 | } | |
1778 | ||
1779 | if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { | |
1780 | pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n", | |
1781 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), | |
3240eac4 | 1782 | MACSEC_SALT_LEN); |
48ef50fa EM |
1783 | rtnl_unlock(); |
1784 | return -EINVAL; | |
1785 | } | |
1786 | } | |
1787 | ||
c09440f7 SD |
1788 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); |
1789 | if (rx_sa) { | |
1790 | rtnl_unlock(); | |
1791 | return -EBUSY; | |
1792 | } | |
1793 | ||
1794 | rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); | |
34aedfee | 1795 | if (!rx_sa) { |
c09440f7 SD |
1796 | rtnl_unlock(); |
1797 | return -ENOMEM; | |
1798 | } | |
1799 | ||
34aedfee DC |
1800 | err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1801 | secy->key_len, secy->icv_len); | |
1802 | if (err < 0) { | |
1803 | kfree(rx_sa); | |
1804 | rtnl_unlock(); | |
1805 | return err; | |
1806 | } | |
1807 | ||
c09440f7 SD |
1808 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
1809 | spin_lock_bh(&rx_sa->lock); | |
48ef50fa | 1810 | rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
1811 | spin_unlock_bh(&rx_sa->lock); |
1812 | } | |
1813 | ||
1814 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1815 | rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1816 | ||
c09440f7 | 1817 | rx_sa->sc = rx_sc; |
3cf3227a | 1818 | |
0a6e9b71 EH |
1819 | if (secy->xpn) { |
1820 | rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); | |
1821 | nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], | |
1822 | MACSEC_SALT_LEN); | |
1823 | } | |
1824 | ||
3cf3227a AT |
1825 | /* If h/w offloading is available, propagate to the device */ |
1826 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
1827 | const struct macsec_ops *ops; | |
1828 | struct macsec_context ctx; | |
1829 | ||
1830 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1831 | if (!ops) { | |
1832 | err = -EOPNOTSUPP; | |
1833 | goto cleanup; | |
1834 | } | |
1835 | ||
1836 | ctx.sa.assoc_num = assoc_num; | |
1837 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 1838 | ctx.secy = secy; |
3cf3227a | 1839 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1f7fe512 | 1840 | secy->key_len); |
3cf3227a AT |
1841 | |
1842 | err = macsec_offload(ops->mdo_add_rxsa, &ctx); | |
aaab73f8 | 1843 | memzero_explicit(ctx.sa.key, secy->key_len); |
3cf3227a AT |
1844 | if (err) |
1845 | goto cleanup; | |
1846 | } | |
1847 | ||
1848 | nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); | |
c09440f7 SD |
1849 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); |
1850 | ||
1851 | rtnl_unlock(); | |
1852 | ||
1853 | return 0; | |
3cf3227a AT |
1854 | |
1855 | cleanup: | |
c7b205fb | 1856 | macsec_rxsa_put(rx_sa); |
3cf3227a AT |
1857 | rtnl_unlock(); |
1858 | return err; | |
c09440f7 SD |
1859 | } |
1860 | ||
1861 | static bool validate_add_rxsc(struct nlattr **attrs) | |
1862 | { | |
1863 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) | |
1864 | return false; | |
1865 | ||
1866 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { | |
1867 | if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) | |
1868 | return false; | |
1869 | } | |
1870 | ||
1871 | return true; | |
1872 | } | |
1873 | ||
1874 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1875 | { | |
1876 | struct net_device *dev; | |
1877 | sci_t sci = MACSEC_UNDEF_SCI; | |
1878 | struct nlattr **attrs = info->attrs; | |
1879 | struct macsec_rx_sc *rx_sc; | |
1880 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
182879f8 | 1881 | struct macsec_secy *secy; |
73a4b31c | 1882 | bool active = true; |
3cf3227a | 1883 | int ret; |
c09440f7 SD |
1884 | |
1885 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1886 | return -EINVAL; | |
1887 | ||
1888 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1889 | return -EINVAL; | |
1890 | ||
1891 | if (!validate_add_rxsc(tb_rxsc)) | |
1892 | return -EINVAL; | |
1893 | ||
1894 | rtnl_lock(); | |
1895 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1896 | if (IS_ERR(dev)) { | |
1897 | rtnl_unlock(); | |
1898 | return PTR_ERR(dev); | |
1899 | } | |
1900 | ||
182879f8 | 1901 | secy = &macsec_priv(dev)->secy; |
c09440f7 SD |
1902 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
1903 | ||
73a4b31c SD |
1904 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) |
1905 | active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
1906 | ||
1907 | rx_sc = create_rx_sc(dev, sci, active); | |
c09440f7 SD |
1908 | if (IS_ERR(rx_sc)) { |
1909 | rtnl_unlock(); | |
1910 | return PTR_ERR(rx_sc); | |
1911 | } | |
1912 | ||
3cf3227a AT |
1913 | if (macsec_is_offloaded(netdev_priv(dev))) { |
1914 | const struct macsec_ops *ops; | |
1915 | struct macsec_context ctx; | |
1916 | ||
1917 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1918 | if (!ops) { | |
1919 | ret = -EOPNOTSUPP; | |
1920 | goto cleanup; | |
1921 | } | |
1922 | ||
1923 | ctx.rx_sc = rx_sc; | |
182879f8 | 1924 | ctx.secy = secy; |
3cf3227a AT |
1925 | |
1926 | ret = macsec_offload(ops->mdo_add_rxsc, &ctx); | |
1927 | if (ret) | |
1928 | goto cleanup; | |
1929 | } | |
1930 | ||
c09440f7 SD |
1931 | rtnl_unlock(); |
1932 | ||
1933 | return 0; | |
3cf3227a AT |
1934 | |
1935 | cleanup: | |
93a30947 SD |
1936 | del_rx_sc(secy, sci); |
1937 | free_rx_sc(rx_sc); | |
3cf3227a AT |
1938 | rtnl_unlock(); |
1939 | return ret; | |
c09440f7 SD |
1940 | } |
1941 | ||
1942 | static bool validate_add_txsa(struct nlattr **attrs) | |
1943 | { | |
1944 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1945 | !attrs[MACSEC_SA_ATTR_PN] || | |
1946 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1947 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1948 | return false; | |
1949 | ||
1950 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1951 | return false; | |
1952 | ||
c630d1fe | 1953 | if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
1954 | return false; |
1955 | ||
1956 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1957 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1958 | return false; | |
1959 | } | |
1960 | ||
8acca6ac SD |
1961 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1962 | return false; | |
1963 | ||
c09440f7 SD |
1964 | return true; |
1965 | } | |
1966 | ||
1967 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) | |
1968 | { | |
1969 | struct net_device *dev; | |
1970 | struct nlattr **attrs = info->attrs; | |
1971 | struct macsec_secy *secy; | |
1972 | struct macsec_tx_sc *tx_sc; | |
1973 | struct macsec_tx_sa *tx_sa; | |
1974 | unsigned char assoc_num; | |
48ef50fa | 1975 | int pn_len; |
c09440f7 | 1976 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
3cf3227a | 1977 | bool was_operational; |
34aedfee | 1978 | int err; |
c09440f7 SD |
1979 | |
1980 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1981 | return -EINVAL; | |
1982 | ||
1983 | if (parse_sa_config(attrs, tb_sa)) | |
1984 | return -EINVAL; | |
1985 | ||
1986 | if (!validate_add_txsa(tb_sa)) | |
1987 | return -EINVAL; | |
1988 | ||
1989 | rtnl_lock(); | |
1990 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1991 | if (IS_ERR(dev)) { | |
1992 | rtnl_unlock(); | |
1993 | return PTR_ERR(dev); | |
1994 | } | |
1995 | ||
1996 | secy = &macsec_priv(dev)->secy; | |
1997 | tx_sc = &secy->tx_sc; | |
1998 | ||
1999 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
2000 | ||
2001 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
2002 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", | |
2003 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
2004 | rtnl_unlock(); | |
2005 | return -EINVAL; | |
2006 | } | |
2007 | ||
48ef50fa EM |
2008 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
2009 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2010 | pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n", | |
2011 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2012 | rtnl_unlock(); | |
2013 | return -EINVAL; | |
2014 | } | |
2015 | ||
2016 | if (secy->xpn) { | |
2017 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { | |
2018 | rtnl_unlock(); | |
2019 | return -EINVAL; | |
2020 | } | |
2021 | ||
2022 | if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { | |
2023 | pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n", | |
2024 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), | |
3240eac4 | 2025 | MACSEC_SALT_LEN); |
48ef50fa EM |
2026 | rtnl_unlock(); |
2027 | return -EINVAL; | |
2028 | } | |
2029 | } | |
2030 | ||
c09440f7 SD |
2031 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); |
2032 | if (tx_sa) { | |
2033 | rtnl_unlock(); | |
2034 | return -EBUSY; | |
2035 | } | |
2036 | ||
2037 | tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); | |
34aedfee | 2038 | if (!tx_sa) { |
c09440f7 SD |
2039 | rtnl_unlock(); |
2040 | return -ENOMEM; | |
2041 | } | |
2042 | ||
34aedfee DC |
2043 | err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
2044 | secy->key_len, secy->icv_len); | |
2045 | if (err < 0) { | |
2046 | kfree(tx_sa); | |
2047 | rtnl_unlock(); | |
2048 | return err; | |
2049 | } | |
2050 | ||
c09440f7 | 2051 | spin_lock_bh(&tx_sa->lock); |
48ef50fa | 2052 | tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2053 | spin_unlock_bh(&tx_sa->lock); |
2054 | ||
2055 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2056 | tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2057 | ||
3cf3227a | 2058 | was_operational = secy->operational; |
c09440f7 SD |
2059 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) |
2060 | secy->operational = true; | |
2061 | ||
0a6e9b71 EH |
2062 | if (secy->xpn) { |
2063 | tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); | |
2064 | nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], | |
2065 | MACSEC_SALT_LEN); | |
2066 | } | |
2067 | ||
3cf3227a AT |
2068 | /* If h/w offloading is available, propagate to the device */ |
2069 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2070 | const struct macsec_ops *ops; | |
2071 | struct macsec_context ctx; | |
2072 | ||
2073 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2074 | if (!ops) { | |
2075 | err = -EOPNOTSUPP; | |
2076 | goto cleanup; | |
2077 | } | |
2078 | ||
2079 | ctx.sa.assoc_num = assoc_num; | |
2080 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2081 | ctx.secy = secy; |
3cf3227a | 2082 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1f7fe512 | 2083 | secy->key_len); |
3cf3227a AT |
2084 | |
2085 | err = macsec_offload(ops->mdo_add_txsa, &ctx); | |
aaab73f8 | 2086 | memzero_explicit(ctx.sa.key, secy->key_len); |
3cf3227a AT |
2087 | if (err) |
2088 | goto cleanup; | |
2089 | } | |
2090 | ||
2091 | nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); | |
c09440f7 SD |
2092 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); |
2093 | ||
2094 | rtnl_unlock(); | |
2095 | ||
2096 | return 0; | |
3cf3227a AT |
2097 | |
2098 | cleanup: | |
2099 | secy->operational = was_operational; | |
c7b205fb | 2100 | macsec_txsa_put(tx_sa); |
3cf3227a AT |
2101 | rtnl_unlock(); |
2102 | return err; | |
c09440f7 SD |
2103 | } |
2104 | ||
2105 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2106 | { | |
2107 | struct nlattr **attrs = info->attrs; | |
2108 | struct net_device *dev; | |
2109 | struct macsec_secy *secy; | |
2110 | struct macsec_rx_sc *rx_sc; | |
2111 | struct macsec_rx_sa *rx_sa; | |
2112 | u8 assoc_num; | |
2113 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2114 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2115 | int ret; |
c09440f7 SD |
2116 | |
2117 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2118 | return -EINVAL; | |
2119 | ||
2120 | if (parse_sa_config(attrs, tb_sa)) | |
2121 | return -EINVAL; | |
2122 | ||
2123 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2124 | return -EINVAL; | |
2125 | ||
2126 | rtnl_lock(); | |
2127 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2128 | &dev, &secy, &rx_sc, &assoc_num); | |
2129 | if (IS_ERR(rx_sa)) { | |
2130 | rtnl_unlock(); | |
2131 | return PTR_ERR(rx_sa); | |
2132 | } | |
2133 | ||
2134 | if (rx_sa->active) { | |
2135 | rtnl_unlock(); | |
2136 | return -EBUSY; | |
2137 | } | |
2138 | ||
3cf3227a AT |
2139 | /* If h/w offloading is available, propagate to the device */ |
2140 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2141 | const struct macsec_ops *ops; | |
2142 | struct macsec_context ctx; | |
2143 | ||
2144 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2145 | if (!ops) { | |
2146 | ret = -EOPNOTSUPP; | |
2147 | goto cleanup; | |
2148 | } | |
2149 | ||
2150 | ctx.sa.assoc_num = assoc_num; | |
2151 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 2152 | ctx.secy = secy; |
3cf3227a AT |
2153 | |
2154 | ret = macsec_offload(ops->mdo_del_rxsa, &ctx); | |
2155 | if (ret) | |
2156 | goto cleanup; | |
2157 | } | |
2158 | ||
c09440f7 SD |
2159 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); |
2160 | clear_rx_sa(rx_sa); | |
2161 | ||
2162 | rtnl_unlock(); | |
2163 | ||
2164 | return 0; | |
3cf3227a AT |
2165 | |
2166 | cleanup: | |
2167 | rtnl_unlock(); | |
2168 | return ret; | |
c09440f7 SD |
2169 | } |
2170 | ||
2171 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2172 | { | |
2173 | struct nlattr **attrs = info->attrs; | |
2174 | struct net_device *dev; | |
2175 | struct macsec_secy *secy; | |
2176 | struct macsec_rx_sc *rx_sc; | |
2177 | sci_t sci; | |
2178 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a | 2179 | int ret; |
c09440f7 SD |
2180 | |
2181 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2182 | return -EINVAL; | |
2183 | ||
2184 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2185 | return -EINVAL; | |
2186 | ||
2187 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
2188 | return -EINVAL; | |
2189 | ||
2190 | rtnl_lock(); | |
2191 | dev = get_dev_from_nl(genl_info_net(info), info->attrs); | |
2192 | if (IS_ERR(dev)) { | |
2193 | rtnl_unlock(); | |
2194 | return PTR_ERR(dev); | |
2195 | } | |
2196 | ||
2197 | secy = &macsec_priv(dev)->secy; | |
2198 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
2199 | ||
2200 | rx_sc = del_rx_sc(secy, sci); | |
2201 | if (!rx_sc) { | |
2202 | rtnl_unlock(); | |
2203 | return -ENODEV; | |
2204 | } | |
2205 | ||
3cf3227a AT |
2206 | /* If h/w offloading is available, propagate to the device */ |
2207 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2208 | const struct macsec_ops *ops; | |
2209 | struct macsec_context ctx; | |
2210 | ||
2211 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2212 | if (!ops) { | |
2213 | ret = -EOPNOTSUPP; | |
2214 | goto cleanup; | |
2215 | } | |
2216 | ||
2217 | ctx.rx_sc = rx_sc; | |
182879f8 | 2218 | ctx.secy = secy; |
3cf3227a AT |
2219 | ret = macsec_offload(ops->mdo_del_rxsc, &ctx); |
2220 | if (ret) | |
2221 | goto cleanup; | |
2222 | } | |
2223 | ||
c09440f7 SD |
2224 | free_rx_sc(rx_sc); |
2225 | rtnl_unlock(); | |
2226 | ||
2227 | return 0; | |
3cf3227a AT |
2228 | |
2229 | cleanup: | |
2230 | rtnl_unlock(); | |
2231 | return ret; | |
c09440f7 SD |
2232 | } |
2233 | ||
2234 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) | |
2235 | { | |
2236 | struct nlattr **attrs = info->attrs; | |
2237 | struct net_device *dev; | |
2238 | struct macsec_secy *secy; | |
2239 | struct macsec_tx_sc *tx_sc; | |
2240 | struct macsec_tx_sa *tx_sa; | |
2241 | u8 assoc_num; | |
2242 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2243 | int ret; |
c09440f7 SD |
2244 | |
2245 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2246 | return -EINVAL; | |
2247 | ||
2248 | if (parse_sa_config(attrs, tb_sa)) | |
2249 | return -EINVAL; | |
2250 | ||
2251 | rtnl_lock(); | |
2252 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2253 | &dev, &secy, &tx_sc, &assoc_num); | |
2254 | if (IS_ERR(tx_sa)) { | |
2255 | rtnl_unlock(); | |
2256 | return PTR_ERR(tx_sa); | |
2257 | } | |
2258 | ||
2259 | if (tx_sa->active) { | |
2260 | rtnl_unlock(); | |
2261 | return -EBUSY; | |
2262 | } | |
2263 | ||
3cf3227a AT |
2264 | /* If h/w offloading is available, propagate to the device */ |
2265 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2266 | const struct macsec_ops *ops; | |
2267 | struct macsec_context ctx; | |
2268 | ||
2269 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2270 | if (!ops) { | |
2271 | ret = -EOPNOTSUPP; | |
2272 | goto cleanup; | |
2273 | } | |
2274 | ||
2275 | ctx.sa.assoc_num = assoc_num; | |
2276 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2277 | ctx.secy = secy; |
3cf3227a AT |
2278 | |
2279 | ret = macsec_offload(ops->mdo_del_txsa, &ctx); | |
2280 | if (ret) | |
2281 | goto cleanup; | |
2282 | } | |
2283 | ||
c09440f7 SD |
2284 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); |
2285 | clear_tx_sa(tx_sa); | |
2286 | ||
2287 | rtnl_unlock(); | |
2288 | ||
2289 | return 0; | |
3cf3227a AT |
2290 | |
2291 | cleanup: | |
2292 | rtnl_unlock(); | |
2293 | return ret; | |
c09440f7 SD |
2294 | } |
2295 | ||
2296 | static bool validate_upd_sa(struct nlattr **attrs) | |
2297 | { | |
2298 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
2299 | attrs[MACSEC_SA_ATTR_KEY] || | |
48ef50fa EM |
2300 | attrs[MACSEC_SA_ATTR_KEYID] || |
2301 | attrs[MACSEC_SA_ATTR_SSCI] || | |
2302 | attrs[MACSEC_SA_ATTR_SALT]) | |
c09440f7 SD |
2303 | return false; |
2304 | ||
2305 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
2306 | return false; | |
2307 | ||
c630d1fe | 2308 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
2309 | return false; |
2310 | ||
2311 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
2312 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
2313 | return false; | |
2314 | } | |
2315 | ||
2316 | return true; | |
2317 | } | |
2318 | ||
2319 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) | |
2320 | { | |
2321 | struct nlattr **attrs = info->attrs; | |
2322 | struct net_device *dev; | |
2323 | struct macsec_secy *secy; | |
2324 | struct macsec_tx_sc *tx_sc; | |
2325 | struct macsec_tx_sa *tx_sa; | |
2326 | u8 assoc_num; | |
2327 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2328 | bool was_operational, was_active; |
a21ecf0e | 2329 | pn_t prev_pn; |
3cf3227a | 2330 | int ret = 0; |
c09440f7 | 2331 | |
a21ecf0e EM |
2332 | prev_pn.full64 = 0; |
2333 | ||
c09440f7 SD |
2334 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2335 | return -EINVAL; | |
2336 | ||
2337 | if (parse_sa_config(attrs, tb_sa)) | |
2338 | return -EINVAL; | |
2339 | ||
2340 | if (!validate_upd_sa(tb_sa)) | |
2341 | return -EINVAL; | |
2342 | ||
2343 | rtnl_lock(); | |
2344 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2345 | &dev, &secy, &tx_sc, &assoc_num); | |
2346 | if (IS_ERR(tx_sa)) { | |
2347 | rtnl_unlock(); | |
2348 | return PTR_ERR(tx_sa); | |
2349 | } | |
2350 | ||
2351 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
48ef50fa EM |
2352 | int pn_len; |
2353 | ||
2354 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; | |
2355 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2356 | pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n", | |
2357 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2358 | rtnl_unlock(); | |
2359 | return -EINVAL; | |
2360 | } | |
2361 | ||
c09440f7 | 2362 | spin_lock_bh(&tx_sa->lock); |
a21ecf0e | 2363 | prev_pn = tx_sa->next_pn_halves; |
48ef50fa | 2364 | tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2365 | spin_unlock_bh(&tx_sa->lock); |
2366 | } | |
2367 | ||
3cf3227a | 2368 | was_active = tx_sa->active; |
c09440f7 SD |
2369 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2370 | tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2371 | ||
3cf3227a | 2372 | was_operational = secy->operational; |
c09440f7 SD |
2373 | if (assoc_num == tx_sc->encoding_sa) |
2374 | secy->operational = tx_sa->active; | |
2375 | ||
3cf3227a AT |
2376 | /* If h/w offloading is available, propagate to the device */ |
2377 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2378 | const struct macsec_ops *ops; | |
2379 | struct macsec_context ctx; | |
2380 | ||
2381 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2382 | if (!ops) { | |
2383 | ret = -EOPNOTSUPP; | |
2384 | goto cleanup; | |
2385 | } | |
2386 | ||
2387 | ctx.sa.assoc_num = assoc_num; | |
2388 | ctx.sa.tx_sa = tx_sa; | |
0412cc84 | 2389 | ctx.sa.update_pn = !!prev_pn.full64; |
182879f8 | 2390 | ctx.secy = secy; |
3cf3227a AT |
2391 | |
2392 | ret = macsec_offload(ops->mdo_upd_txsa, &ctx); | |
2393 | if (ret) | |
2394 | goto cleanup; | |
2395 | } | |
2396 | ||
c09440f7 SD |
2397 | rtnl_unlock(); |
2398 | ||
2399 | return 0; | |
3cf3227a AT |
2400 | |
2401 | cleanup: | |
2402 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2403 | spin_lock_bh(&tx_sa->lock); | |
a21ecf0e | 2404 | tx_sa->next_pn_halves = prev_pn; |
3cf3227a AT |
2405 | spin_unlock_bh(&tx_sa->lock); |
2406 | } | |
2407 | tx_sa->active = was_active; | |
2408 | secy->operational = was_operational; | |
2409 | rtnl_unlock(); | |
2410 | return ret; | |
c09440f7 SD |
2411 | } |
2412 | ||
2413 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2414 | { | |
2415 | struct nlattr **attrs = info->attrs; | |
2416 | struct net_device *dev; | |
2417 | struct macsec_secy *secy; | |
2418 | struct macsec_rx_sc *rx_sc; | |
2419 | struct macsec_rx_sa *rx_sa; | |
2420 | u8 assoc_num; | |
2421 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2422 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2423 | bool was_active; |
a21ecf0e | 2424 | pn_t prev_pn; |
3cf3227a | 2425 | int ret = 0; |
c09440f7 | 2426 | |
a21ecf0e EM |
2427 | prev_pn.full64 = 0; |
2428 | ||
c09440f7 SD |
2429 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2430 | return -EINVAL; | |
2431 | ||
2432 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2433 | return -EINVAL; | |
2434 | ||
2435 | if (parse_sa_config(attrs, tb_sa)) | |
2436 | return -EINVAL; | |
2437 | ||
2438 | if (!validate_upd_sa(tb_sa)) | |
2439 | return -EINVAL; | |
2440 | ||
2441 | rtnl_lock(); | |
2442 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2443 | &dev, &secy, &rx_sc, &assoc_num); | |
2444 | if (IS_ERR(rx_sa)) { | |
2445 | rtnl_unlock(); | |
2446 | return PTR_ERR(rx_sa); | |
2447 | } | |
2448 | ||
2449 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
48ef50fa EM |
2450 | int pn_len; |
2451 | ||
2452 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; | |
2453 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2454 | pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n", | |
2455 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2456 | rtnl_unlock(); | |
2457 | return -EINVAL; | |
2458 | } | |
2459 | ||
c09440f7 | 2460 | spin_lock_bh(&rx_sa->lock); |
a21ecf0e | 2461 | prev_pn = rx_sa->next_pn_halves; |
48ef50fa | 2462 | rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2463 | spin_unlock_bh(&rx_sa->lock); |
2464 | } | |
2465 | ||
3cf3227a | 2466 | was_active = rx_sa->active; |
c09440f7 SD |
2467 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2468 | rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2469 | ||
3cf3227a AT |
2470 | /* If h/w offloading is available, propagate to the device */ |
2471 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2472 | const struct macsec_ops *ops; | |
2473 | struct macsec_context ctx; | |
2474 | ||
2475 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2476 | if (!ops) { | |
2477 | ret = -EOPNOTSUPP; | |
2478 | goto cleanup; | |
2479 | } | |
2480 | ||
2481 | ctx.sa.assoc_num = assoc_num; | |
2482 | ctx.sa.rx_sa = rx_sa; | |
0412cc84 | 2483 | ctx.sa.update_pn = !!prev_pn.full64; |
182879f8 | 2484 | ctx.secy = secy; |
3cf3227a AT |
2485 | |
2486 | ret = macsec_offload(ops->mdo_upd_rxsa, &ctx); | |
2487 | if (ret) | |
2488 | goto cleanup; | |
2489 | } | |
2490 | ||
c09440f7 SD |
2491 | rtnl_unlock(); |
2492 | return 0; | |
3cf3227a AT |
2493 | |
2494 | cleanup: | |
2495 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2496 | spin_lock_bh(&rx_sa->lock); | |
a21ecf0e | 2497 | rx_sa->next_pn_halves = prev_pn; |
3cf3227a AT |
2498 | spin_unlock_bh(&rx_sa->lock); |
2499 | } | |
2500 | rx_sa->active = was_active; | |
2501 | rtnl_unlock(); | |
2502 | return ret; | |
c09440f7 SD |
2503 | } |
2504 | ||
2505 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2506 | { | |
2507 | struct nlattr **attrs = info->attrs; | |
2508 | struct net_device *dev; | |
2509 | struct macsec_secy *secy; | |
2510 | struct macsec_rx_sc *rx_sc; | |
2511 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a AT |
2512 | unsigned int prev_n_rx_sc; |
2513 | bool was_active; | |
2514 | int ret; | |
c09440f7 SD |
2515 | |
2516 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2517 | return -EINVAL; | |
2518 | ||
2519 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2520 | return -EINVAL; | |
2521 | ||
2522 | if (!validate_add_rxsc(tb_rxsc)) | |
2523 | return -EINVAL; | |
2524 | ||
2525 | rtnl_lock(); | |
2526 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
2527 | if (IS_ERR(rx_sc)) { | |
2528 | rtnl_unlock(); | |
2529 | return PTR_ERR(rx_sc); | |
2530 | } | |
2531 | ||
3cf3227a AT |
2532 | was_active = rx_sc->active; |
2533 | prev_n_rx_sc = secy->n_rx_sc; | |
c09440f7 SD |
2534 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { |
2535 | bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
2536 | ||
2537 | if (rx_sc->active != new) | |
2538 | secy->n_rx_sc += new ? 1 : -1; | |
2539 | ||
2540 | rx_sc->active = new; | |
2541 | } | |
2542 | ||
3cf3227a AT |
2543 | /* If h/w offloading is available, propagate to the device */ |
2544 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2545 | const struct macsec_ops *ops; | |
2546 | struct macsec_context ctx; | |
2547 | ||
2548 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2549 | if (!ops) { | |
2550 | ret = -EOPNOTSUPP; | |
2551 | goto cleanup; | |
2552 | } | |
2553 | ||
2554 | ctx.rx_sc = rx_sc; | |
182879f8 | 2555 | ctx.secy = secy; |
3cf3227a AT |
2556 | |
2557 | ret = macsec_offload(ops->mdo_upd_rxsc, &ctx); | |
2558 | if (ret) | |
2559 | goto cleanup; | |
2560 | } | |
2561 | ||
c09440f7 SD |
2562 | rtnl_unlock(); |
2563 | ||
2564 | return 0; | |
3cf3227a AT |
2565 | |
2566 | cleanup: | |
2567 | secy->n_rx_sc = prev_n_rx_sc; | |
2568 | rx_sc->active = was_active; | |
2569 | rtnl_unlock(); | |
2570 | return ret; | |
c09440f7 SD |
2571 | } |
2572 | ||
dcb780fb AT |
2573 | static bool macsec_is_configured(struct macsec_dev *macsec) |
2574 | { | |
2575 | struct macsec_secy *secy = &macsec->secy; | |
2576 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2577 | int i; | |
2578 | ||
80df4706 | 2579 | if (secy->rx_sc) |
dcb780fb AT |
2580 | return true; |
2581 | ||
2582 | for (i = 0; i < MACSEC_NUM_AN; i++) | |
2583 | if (tx_sc->sa[i]) | |
2584 | return true; | |
2585 | ||
2586 | return false; | |
2587 | } | |
2588 | ||
a73d8779 RPNO |
2589 | static bool macsec_needs_tx_tag(struct macsec_dev *macsec, |
2590 | const struct macsec_ops *ops) | |
2591 | { | |
2592 | return macsec->offload == MACSEC_OFFLOAD_PHY && | |
2593 | ops->mdo_insert_tx_tag; | |
2594 | } | |
2595 | ||
2596 | static void macsec_set_head_tail_room(struct net_device *dev) | |
2597 | { | |
2598 | struct macsec_dev *macsec = macsec_priv(dev); | |
2599 | struct net_device *real_dev = macsec->real_dev; | |
2600 | int needed_headroom, needed_tailroom; | |
2601 | const struct macsec_ops *ops; | |
2602 | ||
2603 | ops = macsec_get_ops(macsec, NULL); | |
2604 | if (ops) { | |
2605 | needed_headroom = ops->needed_headroom; | |
2606 | needed_tailroom = ops->needed_tailroom; | |
2607 | } else { | |
2608 | needed_headroom = MACSEC_NEEDED_HEADROOM; | |
2609 | needed_tailroom = MACSEC_NEEDED_TAILROOM; | |
2610 | } | |
2611 | ||
2612 | dev->needed_headroom = real_dev->needed_headroom + needed_headroom; | |
2613 | dev->needed_tailroom = real_dev->needed_tailroom + needed_tailroom; | |
2614 | } | |
2615 | ||
15f17355 EH |
2616 | static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload) |
2617 | { | |
2618 | enum macsec_offload prev_offload; | |
2619 | const struct macsec_ops *ops; | |
2620 | struct macsec_context ctx; | |
2621 | struct macsec_dev *macsec; | |
2622 | int ret = 0; | |
2623 | ||
2624 | macsec = macsec_priv(dev); | |
2625 | ||
2626 | /* Check if the offloading mode is supported by the underlying layers */ | |
2627 | if (offload != MACSEC_OFFLOAD_OFF && | |
2628 | !macsec_check_offload(offload, macsec)) | |
2629 | return -EOPNOTSUPP; | |
2630 | ||
2631 | /* Check if the net device is busy. */ | |
2632 | if (netif_running(dev)) | |
2633 | return -EBUSY; | |
2634 | ||
2635 | /* Check if the device already has rules configured: we do not support | |
2636 | * rules migration. | |
2637 | */ | |
2638 | if (macsec_is_configured(macsec)) | |
2639 | return -EBUSY; | |
2640 | ||
2641 | prev_offload = macsec->offload; | |
2642 | ||
2643 | ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload, | |
2644 | macsec, &ctx); | |
2645 | if (!ops) | |
2646 | return -EOPNOTSUPP; | |
2647 | ||
2648 | macsec->offload = offload; | |
2649 | ||
2650 | ctx.secy = &macsec->secy; | |
2651 | ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(ops->mdo_del_secy, &ctx) | |
2652 | : macsec_offload(ops->mdo_add_secy, &ctx); | |
a73d8779 | 2653 | if (ret) { |
15f17355 | 2654 | macsec->offload = prev_offload; |
a73d8779 RPNO |
2655 | return ret; |
2656 | } | |
2657 | ||
2658 | macsec_set_head_tail_room(dev); | |
2659 | macsec->insert_tx_tag = macsec_needs_tx_tag(macsec, ops); | |
15f17355 EH |
2660 | |
2661 | return ret; | |
2662 | } | |
2663 | ||
dcb780fb AT |
2664 | static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info) |
2665 | { | |
2666 | struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1]; | |
dcb780fb | 2667 | struct nlattr **attrs = info->attrs; |
15f17355 | 2668 | enum macsec_offload offload; |
dcb780fb | 2669 | struct macsec_dev *macsec; |
15f17355 | 2670 | struct net_device *dev; |
f3b4a00f | 2671 | int ret = 0; |
dcb780fb AT |
2672 | |
2673 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2674 | return -EINVAL; | |
2675 | ||
2676 | if (!attrs[MACSEC_ATTR_OFFLOAD]) | |
2677 | return -EINVAL; | |
2678 | ||
2679 | if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX, | |
2680 | attrs[MACSEC_ATTR_OFFLOAD], | |
2681 | macsec_genl_offload_policy, NULL)) | |
2682 | return -EINVAL; | |
2683 | ||
f3b4a00f EH |
2684 | rtnl_lock(); |
2685 | ||
dcb780fb | 2686 | dev = get_dev_from_nl(genl_info_net(info), attrs); |
f3b4a00f EH |
2687 | if (IS_ERR(dev)) { |
2688 | ret = PTR_ERR(dev); | |
2689 | goto out; | |
2690 | } | |
dcb780fb AT |
2691 | macsec = macsec_priv(dev); |
2692 | ||
f3b4a00f EH |
2693 | if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) { |
2694 | ret = -EINVAL; | |
2695 | goto out; | |
2696 | } | |
aa81700c | 2697 | |
dcb780fb | 2698 | offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]); |
dcb780fb | 2699 | |
15f17355 EH |
2700 | if (macsec->offload != offload) |
2701 | ret = macsec_update_offload(dev, offload); | |
f3b4a00f | 2702 | out: |
dcb780fb AT |
2703 | rtnl_unlock(); |
2704 | return ret; | |
2705 | } | |
2706 | ||
b62c3624 DB |
2707 | static void get_tx_sa_stats(struct net_device *dev, int an, |
2708 | struct macsec_tx_sa *tx_sa, | |
2709 | struct macsec_tx_sa_stats *sum) | |
c09440f7 | 2710 | { |
b62c3624 | 2711 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2712 | int cpu; |
2713 | ||
b62c3624 DB |
2714 | /* If h/w offloading is available, propagate to the device */ |
2715 | if (macsec_is_offloaded(macsec)) { | |
2716 | const struct macsec_ops *ops; | |
2717 | struct macsec_context ctx; | |
2718 | ||
2719 | ops = macsec_get_ops(macsec, &ctx); | |
2720 | if (ops) { | |
2721 | ctx.sa.assoc_num = an; | |
2722 | ctx.sa.tx_sa = tx_sa; | |
2723 | ctx.stats.tx_sa_stats = sum; | |
2724 | ctx.secy = &macsec_priv(dev)->secy; | |
2725 | macsec_offload(ops->mdo_get_tx_sa_stats, &ctx); | |
2726 | } | |
2727 | return; | |
2728 | } | |
2729 | ||
c09440f7 | 2730 | for_each_possible_cpu(cpu) { |
b62c3624 DB |
2731 | const struct macsec_tx_sa_stats *stats = |
2732 | per_cpu_ptr(tx_sa->stats, cpu); | |
c09440f7 | 2733 | |
b62c3624 DB |
2734 | sum->OutPktsProtected += stats->OutPktsProtected; |
2735 | sum->OutPktsEncrypted += stats->OutPktsEncrypted; | |
c09440f7 | 2736 | } |
b62c3624 | 2737 | } |
c09440f7 | 2738 | |
b62c3624 DB |
2739 | static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum) |
2740 | { | |
2741 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, | |
2742 | sum->OutPktsProtected) || | |
2743 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
2744 | sum->OutPktsEncrypted)) | |
c09440f7 SD |
2745 | return -EMSGSIZE; |
2746 | ||
2747 | return 0; | |
2748 | } | |
2749 | ||
b62c3624 DB |
2750 | static void get_rx_sa_stats(struct net_device *dev, |
2751 | struct macsec_rx_sc *rx_sc, int an, | |
2752 | struct macsec_rx_sa *rx_sa, | |
2753 | struct macsec_rx_sa_stats *sum) | |
c09440f7 | 2754 | { |
b62c3624 | 2755 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2756 | int cpu; |
2757 | ||
b62c3624 DB |
2758 | /* If h/w offloading is available, propagate to the device */ |
2759 | if (macsec_is_offloaded(macsec)) { | |
2760 | const struct macsec_ops *ops; | |
2761 | struct macsec_context ctx; | |
2762 | ||
2763 | ops = macsec_get_ops(macsec, &ctx); | |
2764 | if (ops) { | |
2765 | ctx.sa.assoc_num = an; | |
2766 | ctx.sa.rx_sa = rx_sa; | |
2767 | ctx.stats.rx_sa_stats = sum; | |
2768 | ctx.secy = &macsec_priv(dev)->secy; | |
2769 | ctx.rx_sc = rx_sc; | |
2770 | macsec_offload(ops->mdo_get_rx_sa_stats, &ctx); | |
2771 | } | |
2772 | return; | |
2773 | } | |
2774 | ||
c09440f7 | 2775 | for_each_possible_cpu(cpu) { |
b62c3624 DB |
2776 | const struct macsec_rx_sa_stats *stats = |
2777 | per_cpu_ptr(rx_sa->stats, cpu); | |
c09440f7 | 2778 | |
b62c3624 DB |
2779 | sum->InPktsOK += stats->InPktsOK; |
2780 | sum->InPktsInvalid += stats->InPktsInvalid; | |
2781 | sum->InPktsNotValid += stats->InPktsNotValid; | |
2782 | sum->InPktsNotUsingSA += stats->InPktsNotUsingSA; | |
2783 | sum->InPktsUnusedSA += stats->InPktsUnusedSA; | |
c09440f7 | 2784 | } |
b62c3624 | 2785 | } |
c09440f7 | 2786 | |
b62c3624 DB |
2787 | static int copy_rx_sa_stats(struct sk_buff *skb, |
2788 | struct macsec_rx_sa_stats *sum) | |
2789 | { | |
2790 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) || | |
2791 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, | |
2792 | sum->InPktsInvalid) || | |
2793 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, | |
2794 | sum->InPktsNotValid) || | |
2795 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
2796 | sum->InPktsNotUsingSA) || | |
2797 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
2798 | sum->InPktsUnusedSA)) | |
c09440f7 SD |
2799 | return -EMSGSIZE; |
2800 | ||
2801 | return 0; | |
2802 | } | |
2803 | ||
b62c3624 DB |
2804 | static void get_rx_sc_stats(struct net_device *dev, |
2805 | struct macsec_rx_sc *rx_sc, | |
2806 | struct macsec_rx_sc_stats *sum) | |
c09440f7 | 2807 | { |
b62c3624 | 2808 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2809 | int cpu; |
2810 | ||
b62c3624 DB |
2811 | /* If h/w offloading is available, propagate to the device */ |
2812 | if (macsec_is_offloaded(macsec)) { | |
2813 | const struct macsec_ops *ops; | |
2814 | struct macsec_context ctx; | |
2815 | ||
2816 | ops = macsec_get_ops(macsec, &ctx); | |
2817 | if (ops) { | |
2818 | ctx.stats.rx_sc_stats = sum; | |
2819 | ctx.secy = &macsec_priv(dev)->secy; | |
2820 | ctx.rx_sc = rx_sc; | |
2821 | macsec_offload(ops->mdo_get_rx_sc_stats, &ctx); | |
2822 | } | |
2823 | return; | |
2824 | } | |
2825 | ||
c09440f7 SD |
2826 | for_each_possible_cpu(cpu) { |
2827 | const struct pcpu_rx_sc_stats *stats; | |
2828 | struct macsec_rx_sc_stats tmp; | |
2829 | unsigned int start; | |
2830 | ||
b62c3624 | 2831 | stats = per_cpu_ptr(rx_sc->stats, cpu); |
c09440f7 | 2832 | do { |
068c38ad | 2833 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2834 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2835 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2836 | |
b62c3624 DB |
2837 | sum->InOctetsValidated += tmp.InOctetsValidated; |
2838 | sum->InOctetsDecrypted += tmp.InOctetsDecrypted; | |
2839 | sum->InPktsUnchecked += tmp.InPktsUnchecked; | |
2840 | sum->InPktsDelayed += tmp.InPktsDelayed; | |
2841 | sum->InPktsOK += tmp.InPktsOK; | |
2842 | sum->InPktsInvalid += tmp.InPktsInvalid; | |
2843 | sum->InPktsLate += tmp.InPktsLate; | |
2844 | sum->InPktsNotValid += tmp.InPktsNotValid; | |
2845 | sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA; | |
2846 | sum->InPktsUnusedSA += tmp.InPktsUnusedSA; | |
c09440f7 | 2847 | } |
b62c3624 | 2848 | } |
c09440f7 | 2849 | |
b62c3624 DB |
2850 | static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum) |
2851 | { | |
f60d94c0 | 2852 | if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
b62c3624 | 2853 | sum->InOctetsValidated, |
f60d94c0 ND |
2854 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2855 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, | |
b62c3624 | 2856 | sum->InOctetsDecrypted, |
f60d94c0 ND |
2857 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2858 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, | |
b62c3624 | 2859 | sum->InPktsUnchecked, |
f60d94c0 ND |
2860 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2861 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, | |
b62c3624 | 2862 | sum->InPktsDelayed, |
f60d94c0 ND |
2863 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2864 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, | |
b62c3624 | 2865 | sum->InPktsOK, |
f60d94c0 ND |
2866 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2867 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, | |
b62c3624 | 2868 | sum->InPktsInvalid, |
f60d94c0 ND |
2869 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2870 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, | |
b62c3624 | 2871 | sum->InPktsLate, |
f60d94c0 ND |
2872 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2873 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, | |
b62c3624 | 2874 | sum->InPktsNotValid, |
f60d94c0 ND |
2875 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2876 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
b62c3624 | 2877 | sum->InPktsNotUsingSA, |
f60d94c0 ND |
2878 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2879 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
b62c3624 | 2880 | sum->InPktsUnusedSA, |
f60d94c0 | 2881 | MACSEC_RXSC_STATS_ATTR_PAD)) |
c09440f7 SD |
2882 | return -EMSGSIZE; |
2883 | ||
2884 | return 0; | |
2885 | } | |
2886 | ||
b62c3624 DB |
2887 | static void get_tx_sc_stats(struct net_device *dev, |
2888 | struct macsec_tx_sc_stats *sum) | |
c09440f7 | 2889 | { |
b62c3624 | 2890 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2891 | int cpu; |
2892 | ||
b62c3624 DB |
2893 | /* If h/w offloading is available, propagate to the device */ |
2894 | if (macsec_is_offloaded(macsec)) { | |
2895 | const struct macsec_ops *ops; | |
2896 | struct macsec_context ctx; | |
2897 | ||
2898 | ops = macsec_get_ops(macsec, &ctx); | |
2899 | if (ops) { | |
2900 | ctx.stats.tx_sc_stats = sum; | |
2901 | ctx.secy = &macsec_priv(dev)->secy; | |
2902 | macsec_offload(ops->mdo_get_tx_sc_stats, &ctx); | |
2903 | } | |
2904 | return; | |
2905 | } | |
2906 | ||
c09440f7 SD |
2907 | for_each_possible_cpu(cpu) { |
2908 | const struct pcpu_tx_sc_stats *stats; | |
2909 | struct macsec_tx_sc_stats tmp; | |
2910 | unsigned int start; | |
2911 | ||
b62c3624 | 2912 | stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu); |
c09440f7 | 2913 | do { |
068c38ad | 2914 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2915 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2916 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2917 | |
b62c3624 DB |
2918 | sum->OutPktsProtected += tmp.OutPktsProtected; |
2919 | sum->OutPktsEncrypted += tmp.OutPktsEncrypted; | |
2920 | sum->OutOctetsProtected += tmp.OutOctetsProtected; | |
2921 | sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted; | |
c09440f7 | 2922 | } |
b62c3624 | 2923 | } |
c09440f7 | 2924 | |
b62c3624 DB |
2925 | static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum) |
2926 | { | |
f60d94c0 | 2927 | if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
b62c3624 | 2928 | sum->OutPktsProtected, |
f60d94c0 ND |
2929 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2930 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
b62c3624 | 2931 | sum->OutPktsEncrypted, |
f60d94c0 ND |
2932 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2933 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, | |
b62c3624 | 2934 | sum->OutOctetsProtected, |
f60d94c0 ND |
2935 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2936 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, | |
b62c3624 | 2937 | sum->OutOctetsEncrypted, |
f60d94c0 | 2938 | MACSEC_TXSC_STATS_ATTR_PAD)) |
c09440f7 SD |
2939 | return -EMSGSIZE; |
2940 | ||
2941 | return 0; | |
2942 | } | |
2943 | ||
b62c3624 | 2944 | static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum) |
c09440f7 | 2945 | { |
b62c3624 | 2946 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2947 | int cpu; |
2948 | ||
b62c3624 DB |
2949 | /* If h/w offloading is available, propagate to the device */ |
2950 | if (macsec_is_offloaded(macsec)) { | |
2951 | const struct macsec_ops *ops; | |
2952 | struct macsec_context ctx; | |
2953 | ||
2954 | ops = macsec_get_ops(macsec, &ctx); | |
2955 | if (ops) { | |
2956 | ctx.stats.dev_stats = sum; | |
2957 | ctx.secy = &macsec_priv(dev)->secy; | |
2958 | macsec_offload(ops->mdo_get_dev_stats, &ctx); | |
2959 | } | |
2960 | return; | |
2961 | } | |
2962 | ||
c09440f7 SD |
2963 | for_each_possible_cpu(cpu) { |
2964 | const struct pcpu_secy_stats *stats; | |
2965 | struct macsec_dev_stats tmp; | |
2966 | unsigned int start; | |
2967 | ||
b62c3624 | 2968 | stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu); |
c09440f7 | 2969 | do { |
068c38ad | 2970 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2971 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2972 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2973 | |
b62c3624 DB |
2974 | sum->OutPktsUntagged += tmp.OutPktsUntagged; |
2975 | sum->InPktsUntagged += tmp.InPktsUntagged; | |
2976 | sum->OutPktsTooLong += tmp.OutPktsTooLong; | |
2977 | sum->InPktsNoTag += tmp.InPktsNoTag; | |
2978 | sum->InPktsBadTag += tmp.InPktsBadTag; | |
2979 | sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI; | |
2980 | sum->InPktsNoSCI += tmp.InPktsNoSCI; | |
2981 | sum->InPktsOverrun += tmp.InPktsOverrun; | |
c09440f7 | 2982 | } |
b62c3624 | 2983 | } |
c09440f7 | 2984 | |
b62c3624 DB |
2985 | static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum) |
2986 | { | |
f60d94c0 | 2987 | if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
b62c3624 | 2988 | sum->OutPktsUntagged, |
f60d94c0 ND |
2989 | MACSEC_SECY_STATS_ATTR_PAD) || |
2990 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, | |
b62c3624 | 2991 | sum->InPktsUntagged, |
f60d94c0 ND |
2992 | MACSEC_SECY_STATS_ATTR_PAD) || |
2993 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, | |
b62c3624 | 2994 | sum->OutPktsTooLong, |
f60d94c0 ND |
2995 | MACSEC_SECY_STATS_ATTR_PAD) || |
2996 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, | |
b62c3624 | 2997 | sum->InPktsNoTag, |
f60d94c0 ND |
2998 | MACSEC_SECY_STATS_ATTR_PAD) || |
2999 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, | |
b62c3624 | 3000 | sum->InPktsBadTag, |
f60d94c0 ND |
3001 | MACSEC_SECY_STATS_ATTR_PAD) || |
3002 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, | |
b62c3624 | 3003 | sum->InPktsUnknownSCI, |
f60d94c0 ND |
3004 | MACSEC_SECY_STATS_ATTR_PAD) || |
3005 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, | |
b62c3624 | 3006 | sum->InPktsNoSCI, |
f60d94c0 ND |
3007 | MACSEC_SECY_STATS_ATTR_PAD) || |
3008 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, | |
b62c3624 | 3009 | sum->InPktsOverrun, |
f60d94c0 | 3010 | MACSEC_SECY_STATS_ATTR_PAD)) |
c09440f7 SD |
3011 | return -EMSGSIZE; |
3012 | ||
3013 | return 0; | |
3014 | } | |
3015 | ||
3016 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) | |
3017 | { | |
3018 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ae0be8de MK |
3019 | struct nlattr *secy_nest = nla_nest_start_noflag(skb, |
3020 | MACSEC_ATTR_SECY); | |
ccfdec90 | 3021 | u64 csid; |
c09440f7 SD |
3022 | |
3023 | if (!secy_nest) | |
3024 | return 1; | |
3025 | ||
ccfdec90 FW |
3026 | switch (secy->key_len) { |
3027 | case MACSEC_GCM_AES_128_SAK_LEN: | |
48ef50fa | 3028 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
3029 | break; |
3030 | case MACSEC_GCM_AES_256_SAK_LEN: | |
48ef50fa | 3031 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
ccfdec90 FW |
3032 | break; |
3033 | default: | |
3034 | goto cancel; | |
3035 | } | |
3036 | ||
f60d94c0 ND |
3037 | if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
3038 | MACSEC_SECY_ATTR_PAD) || | |
3039 | nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, | |
ccfdec90 | 3040 | csid, MACSEC_SECY_ATTR_PAD) || |
c09440f7 SD |
3041 | nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
3042 | nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || | |
3043 | nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || | |
3044 | nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || | |
3045 | nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || | |
3046 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || | |
3047 | nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || | |
3048 | nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || | |
3049 | nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || | |
3050 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) | |
3051 | goto cancel; | |
3052 | ||
3053 | if (secy->replay_protect) { | |
3054 | if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) | |
3055 | goto cancel; | |
3056 | } | |
3057 | ||
3058 | nla_nest_end(skb, secy_nest); | |
3059 | return 0; | |
3060 | ||
3061 | cancel: | |
3062 | nla_nest_cancel(skb, secy_nest); | |
3063 | return 1; | |
3064 | } | |
3065 | ||
e1427237 FW |
3066 | static noinline_for_stack int |
3067 | dump_secy(struct macsec_secy *secy, struct net_device *dev, | |
3068 | struct sk_buff *skb, struct netlink_callback *cb) | |
c09440f7 | 3069 | { |
b62c3624 DB |
3070 | struct macsec_tx_sc_stats tx_sc_stats = {0, }; |
3071 | struct macsec_tx_sa_stats tx_sa_stats = {0, }; | |
3072 | struct macsec_rx_sc_stats rx_sc_stats = {0, }; | |
3073 | struct macsec_rx_sa_stats rx_sa_stats = {0, }; | |
dcb780fb | 3074 | struct macsec_dev *macsec = netdev_priv(dev); |
b62c3624 | 3075 | struct macsec_dev_stats dev_stats = {0, }; |
c09440f7 SD |
3076 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
3077 | struct nlattr *txsa_list, *rxsc_list; | |
dcb780fb | 3078 | struct macsec_rx_sc *rx_sc; |
c09440f7 | 3079 | struct nlattr *attr; |
dcb780fb AT |
3080 | void *hdr; |
3081 | int i, j; | |
c09440f7 SD |
3082 | |
3083 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
3084 | &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); | |
3085 | if (!hdr) | |
3086 | return -EMSGSIZE; | |
3087 | ||
0a833c29 | 3088 | genl_dump_check_consistent(cb, hdr); |
c09440f7 SD |
3089 | |
3090 | if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) | |
3091 | goto nla_put_failure; | |
3092 | ||
dcb780fb AT |
3093 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD); |
3094 | if (!attr) | |
3095 | goto nla_put_failure; | |
3096 | if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload)) | |
3097 | goto nla_put_failure; | |
3098 | nla_nest_end(skb, attr); | |
3099 | ||
c09440f7 SD |
3100 | if (nla_put_secy(secy, skb)) |
3101 | goto nla_put_failure; | |
3102 | ||
ae0be8de | 3103 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS); |
c09440f7 SD |
3104 | if (!attr) |
3105 | goto nla_put_failure; | |
b62c3624 DB |
3106 | |
3107 | get_tx_sc_stats(dev, &tx_sc_stats); | |
3108 | if (copy_tx_sc_stats(skb, &tx_sc_stats)) { | |
c09440f7 SD |
3109 | nla_nest_cancel(skb, attr); |
3110 | goto nla_put_failure; | |
3111 | } | |
3112 | nla_nest_end(skb, attr); | |
3113 | ||
ae0be8de | 3114 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS); |
c09440f7 SD |
3115 | if (!attr) |
3116 | goto nla_put_failure; | |
b62c3624 DB |
3117 | get_secy_stats(dev, &dev_stats); |
3118 | if (copy_secy_stats(skb, &dev_stats)) { | |
c09440f7 SD |
3119 | nla_nest_cancel(skb, attr); |
3120 | goto nla_put_failure; | |
3121 | } | |
3122 | nla_nest_end(skb, attr); | |
3123 | ||
ae0be8de | 3124 | txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST); |
c09440f7 SD |
3125 | if (!txsa_list) |
3126 | goto nla_put_failure; | |
3127 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { | |
3128 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); | |
3129 | struct nlattr *txsa_nest; | |
48ef50fa EM |
3130 | u64 pn; |
3131 | int pn_len; | |
c09440f7 SD |
3132 | |
3133 | if (!tx_sa) | |
3134 | continue; | |
3135 | ||
ae0be8de | 3136 | txsa_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
3137 | if (!txsa_nest) { |
3138 | nla_nest_cancel(skb, txsa_list); | |
3139 | goto nla_put_failure; | |
3140 | } | |
3141 | ||
b62c3624 DB |
3142 | attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS); |
3143 | if (!attr) { | |
3144 | nla_nest_cancel(skb, txsa_nest); | |
3145 | nla_nest_cancel(skb, txsa_list); | |
3146 | goto nla_put_failure; | |
3147 | } | |
3148 | memset(&tx_sa_stats, 0, sizeof(tx_sa_stats)); | |
3149 | get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats); | |
3150 | if (copy_tx_sa_stats(skb, &tx_sa_stats)) { | |
3151 | nla_nest_cancel(skb, attr); | |
3152 | nla_nest_cancel(skb, txsa_nest); | |
3153 | nla_nest_cancel(skb, txsa_list); | |
3154 | goto nla_put_failure; | |
3155 | } | |
3156 | nla_nest_end(skb, attr); | |
3157 | ||
48ef50fa EM |
3158 | if (secy->xpn) { |
3159 | pn = tx_sa->next_pn; | |
3160 | pn_len = MACSEC_XPN_PN_LEN; | |
3161 | } else { | |
3162 | pn = tx_sa->next_pn_halves.lower; | |
3163 | pn_len = MACSEC_DEFAULT_PN_LEN; | |
3164 | } | |
3165 | ||
c09440f7 | 3166 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
48ef50fa | 3167 | nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
8acca6ac | 3168 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
48ef50fa | 3169 | (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) || |
c09440f7 SD |
3170 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
3171 | nla_nest_cancel(skb, txsa_nest); | |
3172 | nla_nest_cancel(skb, txsa_list); | |
3173 | goto nla_put_failure; | |
3174 | } | |
3175 | ||
c09440f7 SD |
3176 | nla_nest_end(skb, txsa_nest); |
3177 | } | |
3178 | nla_nest_end(skb, txsa_list); | |
3179 | ||
ae0be8de | 3180 | rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST); |
c09440f7 SD |
3181 | if (!rxsc_list) |
3182 | goto nla_put_failure; | |
3183 | ||
3184 | j = 1; | |
3185 | for_each_rxsc_rtnl(secy, rx_sc) { | |
3186 | int k; | |
3187 | struct nlattr *rxsa_list; | |
ae0be8de | 3188 | struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
3189 | |
3190 | if (!rxsc_nest) { | |
3191 | nla_nest_cancel(skb, rxsc_list); | |
3192 | goto nla_put_failure; | |
3193 | } | |
3194 | ||
3195 | if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || | |
f60d94c0 ND |
3196 | nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
3197 | MACSEC_RXSC_ATTR_PAD)) { | |
c09440f7 SD |
3198 | nla_nest_cancel(skb, rxsc_nest); |
3199 | nla_nest_cancel(skb, rxsc_list); | |
3200 | goto nla_put_failure; | |
3201 | } | |
3202 | ||
ae0be8de | 3203 | attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS); |
c09440f7 SD |
3204 | if (!attr) { |
3205 | nla_nest_cancel(skb, rxsc_nest); | |
3206 | nla_nest_cancel(skb, rxsc_list); | |
3207 | goto nla_put_failure; | |
3208 | } | |
b62c3624 DB |
3209 | memset(&rx_sc_stats, 0, sizeof(rx_sc_stats)); |
3210 | get_rx_sc_stats(dev, rx_sc, &rx_sc_stats); | |
3211 | if (copy_rx_sc_stats(skb, &rx_sc_stats)) { | |
c09440f7 SD |
3212 | nla_nest_cancel(skb, attr); |
3213 | nla_nest_cancel(skb, rxsc_nest); | |
3214 | nla_nest_cancel(skb, rxsc_list); | |
3215 | goto nla_put_failure; | |
3216 | } | |
3217 | nla_nest_end(skb, attr); | |
3218 | ||
ae0be8de MK |
3219 | rxsa_list = nla_nest_start_noflag(skb, |
3220 | MACSEC_RXSC_ATTR_SA_LIST); | |
c09440f7 SD |
3221 | if (!rxsa_list) { |
3222 | nla_nest_cancel(skb, rxsc_nest); | |
3223 | nla_nest_cancel(skb, rxsc_list); | |
3224 | goto nla_put_failure; | |
3225 | } | |
3226 | ||
3227 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { | |
3228 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); | |
3229 | struct nlattr *rxsa_nest; | |
48ef50fa EM |
3230 | u64 pn; |
3231 | int pn_len; | |
c09440f7 SD |
3232 | |
3233 | if (!rx_sa) | |
3234 | continue; | |
3235 | ||
ae0be8de | 3236 | rxsa_nest = nla_nest_start_noflag(skb, k++); |
c09440f7 SD |
3237 | if (!rxsa_nest) { |
3238 | nla_nest_cancel(skb, rxsa_list); | |
3239 | nla_nest_cancel(skb, rxsc_nest); | |
3240 | nla_nest_cancel(skb, rxsc_list); | |
3241 | goto nla_put_failure; | |
3242 | } | |
3243 | ||
ae0be8de MK |
3244 | attr = nla_nest_start_noflag(skb, |
3245 | MACSEC_SA_ATTR_STATS); | |
c09440f7 SD |
3246 | if (!attr) { |
3247 | nla_nest_cancel(skb, rxsa_list); | |
3248 | nla_nest_cancel(skb, rxsc_nest); | |
3249 | nla_nest_cancel(skb, rxsc_list); | |
3250 | goto nla_put_failure; | |
3251 | } | |
b62c3624 DB |
3252 | memset(&rx_sa_stats, 0, sizeof(rx_sa_stats)); |
3253 | get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats); | |
3254 | if (copy_rx_sa_stats(skb, &rx_sa_stats)) { | |
c09440f7 SD |
3255 | nla_nest_cancel(skb, attr); |
3256 | nla_nest_cancel(skb, rxsa_list); | |
3257 | nla_nest_cancel(skb, rxsc_nest); | |
3258 | nla_nest_cancel(skb, rxsc_list); | |
3259 | goto nla_put_failure; | |
3260 | } | |
3261 | nla_nest_end(skb, attr); | |
3262 | ||
48ef50fa EM |
3263 | if (secy->xpn) { |
3264 | pn = rx_sa->next_pn; | |
3265 | pn_len = MACSEC_XPN_PN_LEN; | |
3266 | } else { | |
3267 | pn = rx_sa->next_pn_halves.lower; | |
3268 | pn_len = MACSEC_DEFAULT_PN_LEN; | |
3269 | } | |
3270 | ||
c09440f7 | 3271 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
48ef50fa | 3272 | nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
8acca6ac | 3273 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
48ef50fa | 3274 | (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) || |
c09440f7 SD |
3275 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
3276 | nla_nest_cancel(skb, rxsa_nest); | |
3277 | nla_nest_cancel(skb, rxsc_nest); | |
3278 | nla_nest_cancel(skb, rxsc_list); | |
3279 | goto nla_put_failure; | |
3280 | } | |
3281 | nla_nest_end(skb, rxsa_nest); | |
3282 | } | |
3283 | ||
3284 | nla_nest_end(skb, rxsa_list); | |
3285 | nla_nest_end(skb, rxsc_nest); | |
3286 | } | |
3287 | ||
3288 | nla_nest_end(skb, rxsc_list); | |
3289 | ||
c09440f7 SD |
3290 | genlmsg_end(skb, hdr); |
3291 | ||
3292 | return 0; | |
3293 | ||
3294 | nla_put_failure: | |
c09440f7 SD |
3295 | genlmsg_cancel(skb, hdr); |
3296 | return -EMSGSIZE; | |
3297 | } | |
3298 | ||
96cfc505 SD |
3299 | static int macsec_generation = 1; /* protected by RTNL */ |
3300 | ||
c09440f7 SD |
3301 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
3302 | { | |
3303 | struct net *net = sock_net(skb->sk); | |
3304 | struct net_device *dev; | |
3305 | int dev_idx, d; | |
3306 | ||
3307 | dev_idx = cb->args[0]; | |
3308 | ||
3309 | d = 0; | |
c10c63ea | 3310 | rtnl_lock(); |
96cfc505 SD |
3311 | |
3312 | cb->seq = macsec_generation; | |
3313 | ||
c09440f7 SD |
3314 | for_each_netdev(net, dev) { |
3315 | struct macsec_secy *secy; | |
3316 | ||
3317 | if (d < dev_idx) | |
3318 | goto next; | |
3319 | ||
3320 | if (!netif_is_macsec(dev)) | |
3321 | goto next; | |
3322 | ||
3323 | secy = &macsec_priv(dev)->secy; | |
3324 | if (dump_secy(secy, dev, skb, cb) < 0) | |
3325 | goto done; | |
3326 | next: | |
3327 | d++; | |
3328 | } | |
3329 | ||
3330 | done: | |
c10c63ea | 3331 | rtnl_unlock(); |
c09440f7 SD |
3332 | cb->args[0] = d; |
3333 | return skb->len; | |
3334 | } | |
3335 | ||
66a9b928 | 3336 | static const struct genl_small_ops macsec_genl_ops[] = { |
c09440f7 SD |
3337 | { |
3338 | .cmd = MACSEC_CMD_GET_TXSC, | |
ef6243ac | 3339 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3340 | .dumpit = macsec_dump_txsc, |
c09440f7 SD |
3341 | }, |
3342 | { | |
3343 | .cmd = MACSEC_CMD_ADD_RXSC, | |
ef6243ac | 3344 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3345 | .doit = macsec_add_rxsc, |
c09440f7 SD |
3346 | .flags = GENL_ADMIN_PERM, |
3347 | }, | |
3348 | { | |
3349 | .cmd = MACSEC_CMD_DEL_RXSC, | |
ef6243ac | 3350 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3351 | .doit = macsec_del_rxsc, |
c09440f7 SD |
3352 | .flags = GENL_ADMIN_PERM, |
3353 | }, | |
3354 | { | |
3355 | .cmd = MACSEC_CMD_UPD_RXSC, | |
ef6243ac | 3356 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3357 | .doit = macsec_upd_rxsc, |
c09440f7 SD |
3358 | .flags = GENL_ADMIN_PERM, |
3359 | }, | |
3360 | { | |
3361 | .cmd = MACSEC_CMD_ADD_TXSA, | |
ef6243ac | 3362 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3363 | .doit = macsec_add_txsa, |
c09440f7 SD |
3364 | .flags = GENL_ADMIN_PERM, |
3365 | }, | |
3366 | { | |
3367 | .cmd = MACSEC_CMD_DEL_TXSA, | |
ef6243ac | 3368 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3369 | .doit = macsec_del_txsa, |
c09440f7 SD |
3370 | .flags = GENL_ADMIN_PERM, |
3371 | }, | |
3372 | { | |
3373 | .cmd = MACSEC_CMD_UPD_TXSA, | |
ef6243ac | 3374 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3375 | .doit = macsec_upd_txsa, |
c09440f7 SD |
3376 | .flags = GENL_ADMIN_PERM, |
3377 | }, | |
3378 | { | |
3379 | .cmd = MACSEC_CMD_ADD_RXSA, | |
ef6243ac | 3380 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3381 | .doit = macsec_add_rxsa, |
c09440f7 SD |
3382 | .flags = GENL_ADMIN_PERM, |
3383 | }, | |
3384 | { | |
3385 | .cmd = MACSEC_CMD_DEL_RXSA, | |
ef6243ac | 3386 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3387 | .doit = macsec_del_rxsa, |
c09440f7 SD |
3388 | .flags = GENL_ADMIN_PERM, |
3389 | }, | |
3390 | { | |
3391 | .cmd = MACSEC_CMD_UPD_RXSA, | |
ef6243ac | 3392 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3393 | .doit = macsec_upd_rxsa, |
c09440f7 SD |
3394 | .flags = GENL_ADMIN_PERM, |
3395 | }, | |
dcb780fb AT |
3396 | { |
3397 | .cmd = MACSEC_CMD_UPD_OFFLOAD, | |
3398 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
3399 | .doit = macsec_upd_offload, | |
3400 | .flags = GENL_ADMIN_PERM, | |
3401 | }, | |
c09440f7 SD |
3402 | }; |
3403 | ||
56989f6d | 3404 | static struct genl_family macsec_fam __ro_after_init = { |
489111e5 JB |
3405 | .name = MACSEC_GENL_NAME, |
3406 | .hdrsize = 0, | |
3407 | .version = MACSEC_GENL_VERSION, | |
3408 | .maxattr = MACSEC_ATTR_MAX, | |
3b0f31f2 | 3409 | .policy = macsec_genl_policy, |
489111e5 JB |
3410 | .netnsok = true, |
3411 | .module = THIS_MODULE, | |
66a9b928 JK |
3412 | .small_ops = macsec_genl_ops, |
3413 | .n_small_ops = ARRAY_SIZE(macsec_genl_ops), | |
9c5d03d3 | 3414 | .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1, |
489111e5 JB |
3415 | }; |
3416 | ||
a73d8779 RPNO |
3417 | static struct sk_buff *macsec_insert_tx_tag(struct sk_buff *skb, |
3418 | struct net_device *dev) | |
3419 | { | |
3420 | struct macsec_dev *macsec = macsec_priv(dev); | |
3421 | const struct macsec_ops *ops; | |
3422 | struct phy_device *phydev; | |
3423 | struct macsec_context ctx; | |
3424 | int skb_final_len; | |
3425 | int err; | |
3426 | ||
3427 | ops = macsec_get_ops(macsec, &ctx); | |
3428 | skb_final_len = skb->len - ETH_HLEN + ops->needed_headroom + | |
3429 | ops->needed_tailroom; | |
3430 | if (unlikely(skb_final_len > macsec->real_dev->mtu)) { | |
3431 | err = -EINVAL; | |
3432 | goto cleanup; | |
3433 | } | |
3434 | ||
3435 | phydev = macsec->real_dev->phydev; | |
3436 | ||
3437 | err = skb_ensure_writable_head_tail(skb, dev); | |
3438 | if (unlikely(err < 0)) | |
3439 | goto cleanup; | |
3440 | ||
3441 | err = ops->mdo_insert_tx_tag(phydev, skb); | |
3442 | if (unlikely(err)) | |
3443 | goto cleanup; | |
3444 | ||
3445 | return skb; | |
3446 | cleanup: | |
3447 | kfree_skb(skb); | |
3448 | return ERR_PTR(err); | |
3449 | } | |
3450 | ||
c09440f7 SD |
3451 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
3452 | struct net_device *dev) | |
3453 | { | |
3454 | struct macsec_dev *macsec = netdev_priv(dev); | |
3455 | struct macsec_secy *secy = &macsec->secy; | |
3456 | struct pcpu_secy_stats *secy_stats; | |
3457 | int ret, len; | |
3458 | ||
3cf3227a | 3459 | if (macsec_is_offloaded(netdev_priv(dev))) { |
0a28bfd4 LN |
3460 | struct metadata_dst *md_dst = secy->tx_sc.md_dst; |
3461 | ||
3462 | skb_dst_drop(skb); | |
3463 | dst_hold(&md_dst->dst); | |
3464 | skb_dst_set(skb, &md_dst->dst); | |
a73d8779 RPNO |
3465 | |
3466 | if (macsec->insert_tx_tag) { | |
3467 | skb = macsec_insert_tx_tag(skb, dev); | |
3468 | if (IS_ERR(skb)) { | |
3469 | DEV_STATS_INC(dev, tx_dropped); | |
3470 | return NETDEV_TX_OK; | |
3471 | } | |
3472 | } | |
3473 | ||
3cf3227a AT |
3474 | skb->dev = macsec->real_dev; |
3475 | return dev_queue_xmit(skb); | |
3476 | } | |
3477 | ||
c09440f7 SD |
3478 | /* 10.5 */ |
3479 | if (!secy->protect_frames) { | |
3480 | secy_stats = this_cpu_ptr(macsec->stats); | |
3481 | u64_stats_update_begin(&secy_stats->syncp); | |
3482 | secy_stats->stats.OutPktsUntagged++; | |
3483 | u64_stats_update_end(&secy_stats->syncp); | |
79c62220 | 3484 | skb->dev = macsec->real_dev; |
c09440f7 SD |
3485 | len = skb->len; |
3486 | ret = dev_queue_xmit(skb); | |
3487 | count_tx(dev, ret, len); | |
3488 | return ret; | |
3489 | } | |
3490 | ||
3491 | if (!secy->operational) { | |
3492 | kfree_skb(skb); | |
32d0a49d | 3493 | DEV_STATS_INC(dev, tx_dropped); |
c09440f7 SD |
3494 | return NETDEV_TX_OK; |
3495 | } | |
3496 | ||
91ec9bd5 | 3497 | len = skb->len; |
c09440f7 SD |
3498 | skb = macsec_encrypt(skb, dev); |
3499 | if (IS_ERR(skb)) { | |
3500 | if (PTR_ERR(skb) != -EINPROGRESS) | |
32d0a49d | 3501 | DEV_STATS_INC(dev, tx_dropped); |
c09440f7 SD |
3502 | return NETDEV_TX_OK; |
3503 | } | |
3504 | ||
3505 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
3506 | ||
3507 | macsec_encrypt_finish(skb, dev); | |
c09440f7 SD |
3508 | ret = dev_queue_xmit(skb); |
3509 | count_tx(dev, ret, len); | |
3510 | return ret; | |
3511 | } | |
3512 | ||
8bcd560a | 3513 | #define MACSEC_FEATURES \ |
c09440f7 | 3514 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) |
e2003872 | 3515 | |
c09440f7 SD |
3516 | static int macsec_dev_init(struct net_device *dev) |
3517 | { | |
3518 | struct macsec_dev *macsec = macsec_priv(dev); | |
3519 | struct net_device *real_dev = macsec->real_dev; | |
5491e7c6 | 3520 | int err; |
c09440f7 SD |
3521 | |
3522 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
3523 | if (!dev->tstats) | |
3524 | return -ENOMEM; | |
3525 | ||
5491e7c6 PA |
3526 | err = gro_cells_init(&macsec->gro_cells, dev); |
3527 | if (err) { | |
3528 | free_percpu(dev->tstats); | |
3529 | return err; | |
3530 | } | |
3531 | ||
8bcd560a SD |
3532 | dev->features = real_dev->features & MACSEC_FEATURES; |
3533 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
c09440f7 | 3534 | |
a73d8779 | 3535 | macsec_set_head_tail_room(dev); |
c09440f7 SD |
3536 | |
3537 | if (is_zero_ether_addr(dev->dev_addr)) | |
3538 | eth_hw_addr_inherit(dev, real_dev); | |
3539 | if (is_zero_ether_addr(dev->broadcast)) | |
3540 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
3541 | ||
196a888c | 3542 | /* Get macsec's reference to real_dev */ |
d62607c3 | 3543 | netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL); |
196a888c | 3544 | |
c09440f7 SD |
3545 | return 0; |
3546 | } | |
3547 | ||
3548 | static void macsec_dev_uninit(struct net_device *dev) | |
3549 | { | |
5491e7c6 PA |
3550 | struct macsec_dev *macsec = macsec_priv(dev); |
3551 | ||
3552 | gro_cells_destroy(&macsec->gro_cells); | |
c09440f7 SD |
3553 | free_percpu(dev->tstats); |
3554 | } | |
3555 | ||
3556 | static netdev_features_t macsec_fix_features(struct net_device *dev, | |
3557 | netdev_features_t features) | |
3558 | { | |
3559 | struct macsec_dev *macsec = macsec_priv(dev); | |
3560 | struct net_device *real_dev = macsec->real_dev; | |
3561 | ||
8bcd560a | 3562 | features &= (real_dev->features & MACSEC_FEATURES) | |
5491e7c6 PA |
3563 | NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; |
3564 | features |= NETIF_F_LLTX; | |
c09440f7 SD |
3565 | |
3566 | return features; | |
3567 | } | |
3568 | ||
3569 | static int macsec_dev_open(struct net_device *dev) | |
3570 | { | |
3571 | struct macsec_dev *macsec = macsec_priv(dev); | |
3572 | struct net_device *real_dev = macsec->real_dev; | |
3573 | int err; | |
3574 | ||
c09440f7 SD |
3575 | err = dev_uc_add(real_dev, dev->dev_addr); |
3576 | if (err < 0) | |
3577 | return err; | |
3578 | ||
3579 | if (dev->flags & IFF_ALLMULTI) { | |
3580 | err = dev_set_allmulti(real_dev, 1); | |
3581 | if (err < 0) | |
3582 | goto del_unicast; | |
3583 | } | |
3584 | ||
3585 | if (dev->flags & IFF_PROMISC) { | |
3586 | err = dev_set_promiscuity(real_dev, 1); | |
3587 | if (err < 0) | |
3588 | goto clear_allmulti; | |
3589 | } | |
3590 | ||
3cf3227a AT |
3591 | /* If h/w offloading is available, propagate to the device */ |
3592 | if (macsec_is_offloaded(macsec)) { | |
3593 | const struct macsec_ops *ops; | |
3594 | struct macsec_context ctx; | |
3595 | ||
3596 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3597 | if (!ops) { | |
3598 | err = -EOPNOTSUPP; | |
3599 | goto clear_allmulti; | |
3600 | } | |
3601 | ||
182879f8 | 3602 | ctx.secy = &macsec->secy; |
3cf3227a AT |
3603 | err = macsec_offload(ops->mdo_dev_open, &ctx); |
3604 | if (err) | |
3605 | goto clear_allmulti; | |
3606 | } | |
3607 | ||
c09440f7 SD |
3608 | if (netif_carrier_ok(real_dev)) |
3609 | netif_carrier_on(dev); | |
3610 | ||
3611 | return 0; | |
3612 | clear_allmulti: | |
3613 | if (dev->flags & IFF_ALLMULTI) | |
3614 | dev_set_allmulti(real_dev, -1); | |
3615 | del_unicast: | |
3616 | dev_uc_del(real_dev, dev->dev_addr); | |
3617 | netif_carrier_off(dev); | |
3618 | return err; | |
3619 | } | |
3620 | ||
3621 | static int macsec_dev_stop(struct net_device *dev) | |
3622 | { | |
3623 | struct macsec_dev *macsec = macsec_priv(dev); | |
3624 | struct net_device *real_dev = macsec->real_dev; | |
3625 | ||
3626 | netif_carrier_off(dev); | |
3627 | ||
3cf3227a AT |
3628 | /* If h/w offloading is available, propagate to the device */ |
3629 | if (macsec_is_offloaded(macsec)) { | |
3630 | const struct macsec_ops *ops; | |
3631 | struct macsec_context ctx; | |
3632 | ||
3633 | ops = macsec_get_ops(macsec, &ctx); | |
182879f8 DB |
3634 | if (ops) { |
3635 | ctx.secy = &macsec->secy; | |
3cf3227a | 3636 | macsec_offload(ops->mdo_dev_stop, &ctx); |
182879f8 | 3637 | } |
3cf3227a AT |
3638 | } |
3639 | ||
c09440f7 SD |
3640 | dev_mc_unsync(real_dev, dev); |
3641 | dev_uc_unsync(real_dev, dev); | |
3642 | ||
3643 | if (dev->flags & IFF_ALLMULTI) | |
3644 | dev_set_allmulti(real_dev, -1); | |
3645 | ||
3646 | if (dev->flags & IFF_PROMISC) | |
3647 | dev_set_promiscuity(real_dev, -1); | |
3648 | ||
3649 | dev_uc_del(real_dev, dev->dev_addr); | |
3650 | ||
3651 | return 0; | |
3652 | } | |
3653 | ||
3654 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) | |
3655 | { | |
3656 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3657 | ||
3658 | if (!(dev->flags & IFF_UP)) | |
3659 | return; | |
3660 | ||
3661 | if (change & IFF_ALLMULTI) | |
3662 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3663 | ||
3664 | if (change & IFF_PROMISC) | |
3665 | dev_set_promiscuity(real_dev, | |
3666 | dev->flags & IFF_PROMISC ? 1 : -1); | |
3667 | } | |
3668 | ||
3669 | static void macsec_dev_set_rx_mode(struct net_device *dev) | |
3670 | { | |
3671 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3672 | ||
3673 | dev_mc_sync(real_dev, dev); | |
3674 | dev_uc_sync(real_dev, dev); | |
3675 | } | |
3676 | ||
3677 | static int macsec_set_mac_address(struct net_device *dev, void *p) | |
3678 | { | |
3679 | struct macsec_dev *macsec = macsec_priv(dev); | |
3680 | struct net_device *real_dev = macsec->real_dev; | |
3681 | struct sockaddr *addr = p; | |
25a00d0c | 3682 | u8 old_addr[ETH_ALEN]; |
c09440f7 SD |
3683 | int err; |
3684 | ||
3685 | if (!is_valid_ether_addr(addr->sa_data)) | |
3686 | return -EADDRNOTAVAIL; | |
3687 | ||
25a00d0c RPNO |
3688 | if (dev->flags & IFF_UP) { |
3689 | err = dev_uc_add(real_dev, addr->sa_data); | |
3690 | if (err < 0) | |
3691 | return err; | |
3692 | } | |
c09440f7 | 3693 | |
25a00d0c | 3694 | ether_addr_copy(old_addr, dev->dev_addr); |
e35b8d7d | 3695 | eth_hw_addr_set(dev, addr->sa_data); |
09f4136c DB |
3696 | |
3697 | /* If h/w offloading is available, propagate to the device */ | |
3698 | if (macsec_is_offloaded(macsec)) { | |
3699 | const struct macsec_ops *ops; | |
3700 | struct macsec_context ctx; | |
3701 | ||
3702 | ops = macsec_get_ops(macsec, &ctx); | |
25a00d0c RPNO |
3703 | if (!ops) { |
3704 | err = -EOPNOTSUPP; | |
3705 | goto restore_old_addr; | |
09f4136c | 3706 | } |
25a00d0c RPNO |
3707 | |
3708 | ctx.secy = &macsec->secy; | |
3709 | err = macsec_offload(ops->mdo_upd_secy, &ctx); | |
3710 | if (err) | |
3711 | goto restore_old_addr; | |
09f4136c DB |
3712 | } |
3713 | ||
25a00d0c RPNO |
3714 | if (dev->flags & IFF_UP) |
3715 | dev_uc_del(real_dev, old_addr); | |
3716 | ||
c09440f7 | 3717 | return 0; |
25a00d0c RPNO |
3718 | |
3719 | restore_old_addr: | |
3720 | if (dev->flags & IFF_UP) | |
3721 | dev_uc_del(real_dev, addr->sa_data); | |
3722 | ||
3723 | eth_hw_addr_set(dev, old_addr); | |
3724 | ||
3725 | return err; | |
c09440f7 SD |
3726 | } |
3727 | ||
3728 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) | |
3729 | { | |
3730 | struct macsec_dev *macsec = macsec_priv(dev); | |
3731 | unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); | |
3732 | ||
3733 | if (macsec->real_dev->mtu - extra < new_mtu) | |
3734 | return -ERANGE; | |
3735 | ||
3736 | dev->mtu = new_mtu; | |
3737 | ||
3738 | return 0; | |
3739 | } | |
3740 | ||
bc1f4470 | 3741 | static void macsec_get_stats64(struct net_device *dev, |
3742 | struct rtnl_link_stats64 *s) | |
c09440f7 | 3743 | { |
c09440f7 | 3744 | if (!dev->tstats) |
bc1f4470 | 3745 | return; |
c09440f7 | 3746 | |
9d015167 | 3747 | dev_fetch_sw_netstats(s, dev->tstats); |
c09440f7 | 3748 | |
0b068c71 ED |
3749 | s->rx_dropped = DEV_STATS_READ(dev, rx_dropped); |
3750 | s->tx_dropped = DEV_STATS_READ(dev, tx_dropped); | |
3751 | s->rx_errors = DEV_STATS_READ(dev, rx_errors); | |
c09440f7 SD |
3752 | } |
3753 | ||
3754 | static int macsec_get_iflink(const struct net_device *dev) | |
3755 | { | |
3756 | return macsec_priv(dev)->real_dev->ifindex; | |
3757 | } | |
3758 | ||
3759 | static const struct net_device_ops macsec_netdev_ops = { | |
3760 | .ndo_init = macsec_dev_init, | |
3761 | .ndo_uninit = macsec_dev_uninit, | |
3762 | .ndo_open = macsec_dev_open, | |
3763 | .ndo_stop = macsec_dev_stop, | |
3764 | .ndo_fix_features = macsec_fix_features, | |
3765 | .ndo_change_mtu = macsec_change_mtu, | |
3766 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, | |
3767 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, | |
3768 | .ndo_set_mac_address = macsec_set_mac_address, | |
3769 | .ndo_start_xmit = macsec_start_xmit, | |
3770 | .ndo_get_stats64 = macsec_get_stats64, | |
3771 | .ndo_get_iflink = macsec_get_iflink, | |
3772 | }; | |
3773 | ||
3774 | static const struct device_type macsec_type = { | |
3775 | .name = "macsec", | |
3776 | }; | |
3777 | ||
3778 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { | |
3779 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, | |
31d9a1c5 | 3780 | [IFLA_MACSEC_PORT] = { .type = NLA_U16 }, |
c09440f7 SD |
3781 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, |
3782 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, | |
3783 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, | |
3784 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, | |
3785 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, | |
3786 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, | |
3787 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, | |
3788 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, | |
3789 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, | |
3790 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, | |
3791 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, | |
38099024 | 3792 | [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 }, |
c09440f7 SD |
3793 | }; |
3794 | ||
3795 | static void macsec_free_netdev(struct net_device *dev) | |
3796 | { | |
3797 | struct macsec_dev *macsec = macsec_priv(dev); | |
c09440f7 | 3798 | |
c52add61 SD |
3799 | if (macsec->secy.tx_sc.md_dst) |
3800 | metadata_dst_free(macsec->secy.tx_sc.md_dst); | |
c09440f7 SD |
3801 | free_percpu(macsec->stats); |
3802 | free_percpu(macsec->secy.tx_sc.stats); | |
3803 | ||
196a888c | 3804 | /* Get rid of the macsec's reference to real_dev */ |
d62607c3 | 3805 | netdev_put(macsec->real_dev, &macsec->dev_tracker); |
c09440f7 SD |
3806 | } |
3807 | ||
3808 | static void macsec_setup(struct net_device *dev) | |
3809 | { | |
3810 | ether_setup(dev); | |
91572088 JW |
3811 | dev->min_mtu = 0; |
3812 | dev->max_mtu = ETH_MAX_MTU; | |
e425974f | 3813 | dev->priv_flags |= IFF_NO_QUEUE; |
c09440f7 | 3814 | dev->netdev_ops = &macsec_netdev_ops; |
cf124db5 DM |
3815 | dev->needs_free_netdev = true; |
3816 | dev->priv_destructor = macsec_free_netdev; | |
c24acf03 | 3817 | SET_NETDEV_DEVTYPE(dev, &macsec_type); |
c09440f7 SD |
3818 | |
3819 | eth_zero_addr(dev->broadcast); | |
3820 | } | |
3821 | ||
ccfdec90 FW |
3822 | static int macsec_changelink_common(struct net_device *dev, |
3823 | struct nlattr *data[]) | |
c09440f7 SD |
3824 | { |
3825 | struct macsec_secy *secy; | |
3826 | struct macsec_tx_sc *tx_sc; | |
3827 | ||
3828 | secy = &macsec_priv(dev)->secy; | |
3829 | tx_sc = &secy->tx_sc; | |
3830 | ||
3831 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3832 | struct macsec_tx_sa *tx_sa; | |
3833 | ||
3834 | tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); | |
3835 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); | |
3836 | ||
3837 | secy->operational = tx_sa && tx_sa->active; | |
3838 | } | |
3839 | ||
c09440f7 SD |
3840 | if (data[IFLA_MACSEC_ENCRYPT]) |
3841 | tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); | |
3842 | ||
3843 | if (data[IFLA_MACSEC_PROTECT]) | |
3844 | secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); | |
3845 | ||
3846 | if (data[IFLA_MACSEC_INC_SCI]) | |
3847 | tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
3848 | ||
3849 | if (data[IFLA_MACSEC_ES]) | |
3850 | tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); | |
3851 | ||
3852 | if (data[IFLA_MACSEC_SCB]) | |
3853 | tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); | |
3854 | ||
3855 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) | |
3856 | secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); | |
3857 | ||
3858 | if (data[IFLA_MACSEC_VALIDATION]) | |
3859 | secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); | |
ccfdec90 FW |
3860 | |
3861 | if (data[IFLA_MACSEC_CIPHER_SUITE]) { | |
3862 | switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) { | |
3863 | case MACSEC_CIPHER_ID_GCM_AES_128: | |
e8660ded | 3864 | case MACSEC_DEFAULT_CIPHER_ID: |
ccfdec90 | 3865 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
48ef50fa | 3866 | secy->xpn = false; |
ccfdec90 FW |
3867 | break; |
3868 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
3869 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
48ef50fa EM |
3870 | secy->xpn = false; |
3871 | break; | |
3872 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: | |
3873 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; | |
3874 | secy->xpn = true; | |
3875 | break; | |
3876 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: | |
3877 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
3878 | secy->xpn = true; | |
ccfdec90 FW |
3879 | break; |
3880 | default: | |
3881 | return -EINVAL; | |
3882 | } | |
3883 | } | |
3884 | ||
b07a0e20 SD |
3885 | if (data[IFLA_MACSEC_WINDOW]) { |
3886 | secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); | |
3887 | ||
3888 | /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window | |
3889 | * for XPN cipher suites */ | |
3890 | if (secy->xpn && | |
3891 | secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW) | |
3892 | return -EINVAL; | |
3893 | } | |
3894 | ||
ccfdec90 | 3895 | return 0; |
c09440f7 SD |
3896 | } |
3897 | ||
3898 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
3899 | struct nlattr *data[], |
3900 | struct netlink_ext_ack *extack) | |
c09440f7 | 3901 | { |
3cf3227a | 3902 | struct macsec_dev *macsec = macsec_priv(dev); |
15f17355 EH |
3903 | bool macsec_offload_state_change = false; |
3904 | enum macsec_offload offload; | |
022e9d60 | 3905 | struct macsec_tx_sc tx_sc; |
3cf3227a AT |
3906 | struct macsec_secy secy; |
3907 | int ret; | |
3908 | ||
c09440f7 SD |
3909 | if (!data) |
3910 | return 0; | |
3911 | ||
3912 | if (data[IFLA_MACSEC_CIPHER_SUITE] || | |
3913 | data[IFLA_MACSEC_ICV_LEN] || | |
3914 | data[IFLA_MACSEC_SCI] || | |
3915 | data[IFLA_MACSEC_PORT]) | |
3916 | return -EINVAL; | |
3917 | ||
3cf3227a AT |
3918 | /* Keep a copy of unmodified secy and tx_sc, in case the offload |
3919 | * propagation fails, to revert macsec_changelink_common. | |
3920 | */ | |
3921 | memcpy(&secy, &macsec->secy, sizeof(secy)); | |
3922 | memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc)); | |
3923 | ||
3924 | ret = macsec_changelink_common(dev, data); | |
3925 | if (ret) | |
b07a0e20 | 3926 | goto cleanup; |
3cf3227a | 3927 | |
15f17355 EH |
3928 | if (data[IFLA_MACSEC_OFFLOAD]) { |
3929 | offload = nla_get_u8(data[IFLA_MACSEC_OFFLOAD]); | |
3930 | if (macsec->offload != offload) { | |
3931 | macsec_offload_state_change = true; | |
3932 | ret = macsec_update_offload(dev, offload); | |
3933 | if (ret) | |
3934 | goto cleanup; | |
3935 | } | |
3936 | } | |
3937 | ||
3cf3227a | 3938 | /* If h/w offloading is available, propagate to the device */ |
15f17355 | 3939 | if (!macsec_offload_state_change && macsec_is_offloaded(macsec)) { |
3cf3227a AT |
3940 | const struct macsec_ops *ops; |
3941 | struct macsec_context ctx; | |
3cf3227a AT |
3942 | |
3943 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3944 | if (!ops) { | |
3945 | ret = -EOPNOTSUPP; | |
3946 | goto cleanup; | |
3947 | } | |
3948 | ||
3949 | ctx.secy = &macsec->secy; | |
3950 | ret = macsec_offload(ops->mdo_upd_secy, &ctx); | |
3951 | if (ret) | |
3952 | goto cleanup; | |
3953 | } | |
3954 | ||
3955 | return 0; | |
3956 | ||
3957 | cleanup: | |
3958 | memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc)); | |
3959 | memcpy(&macsec->secy, &secy, sizeof(secy)); | |
3960 | ||
3961 | return ret; | |
c09440f7 SD |
3962 | } |
3963 | ||
3964 | static void macsec_del_dev(struct macsec_dev *macsec) | |
3965 | { | |
3966 | int i; | |
3967 | ||
3968 | while (macsec->secy.rx_sc) { | |
3969 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); | |
3970 | ||
3971 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); | |
3972 | free_rx_sc(rx_sc); | |
3973 | } | |
3974 | ||
3975 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
3976 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); | |
3977 | ||
3978 | if (sa) { | |
3979 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); | |
3980 | clear_tx_sa(sa); | |
3981 | } | |
3982 | } | |
3983 | } | |
3984 | ||
bbe11fab SD |
3985 | static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
3986 | { | |
3987 | struct macsec_dev *macsec = macsec_priv(dev); | |
e2003872 | 3988 | struct net_device *real_dev = macsec->real_dev; |
bbe11fab | 3989 | |
9cef24c8 LN |
3990 | /* If h/w offloading is available, propagate to the device */ |
3991 | if (macsec_is_offloaded(macsec)) { | |
3992 | const struct macsec_ops *ops; | |
3993 | struct macsec_context ctx; | |
3994 | ||
3995 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3996 | if (ops) { | |
3997 | ctx.secy = &macsec->secy; | |
3998 | macsec_offload(ops->mdo_del_secy, &ctx); | |
3999 | } | |
4000 | } | |
4001 | ||
bbe11fab SD |
4002 | unregister_netdevice_queue(dev, head); |
4003 | list_del_rcu(&macsec->secys); | |
4004 | macsec_del_dev(macsec); | |
e2003872 | 4005 | netdev_upper_dev_unlink(real_dev, dev); |
bbe11fab SD |
4006 | |
4007 | macsec_generation++; | |
4008 | } | |
4009 | ||
c09440f7 SD |
4010 | static void macsec_dellink(struct net_device *dev, struct list_head *head) |
4011 | { | |
4012 | struct macsec_dev *macsec = macsec_priv(dev); | |
4013 | struct net_device *real_dev = macsec->real_dev; | |
4014 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
4015 | ||
bbe11fab | 4016 | macsec_common_dellink(dev, head); |
96cfc505 | 4017 | |
960d5848 | 4018 | if (list_empty(&rxd->secys)) { |
c09440f7 | 4019 | netdev_rx_handler_unregister(real_dev); |
960d5848 SD |
4020 | kfree(rxd); |
4021 | } | |
c09440f7 SD |
4022 | } |
4023 | ||
4024 | static int register_macsec_dev(struct net_device *real_dev, | |
4025 | struct net_device *dev) | |
4026 | { | |
4027 | struct macsec_dev *macsec = macsec_priv(dev); | |
4028 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
4029 | ||
4030 | if (!rxd) { | |
4031 | int err; | |
4032 | ||
4033 | rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); | |
4034 | if (!rxd) | |
4035 | return -ENOMEM; | |
4036 | ||
4037 | INIT_LIST_HEAD(&rxd->secys); | |
4038 | ||
4039 | err = netdev_rx_handler_register(real_dev, macsec_handle_frame, | |
4040 | rxd); | |
960d5848 SD |
4041 | if (err < 0) { |
4042 | kfree(rxd); | |
c09440f7 | 4043 | return err; |
960d5848 | 4044 | } |
c09440f7 SD |
4045 | } |
4046 | ||
4047 | list_add_tail_rcu(&macsec->secys, &rxd->secys); | |
4048 | return 0; | |
4049 | } | |
4050 | ||
4051 | static bool sci_exists(struct net_device *dev, sci_t sci) | |
4052 | { | |
4053 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); | |
4054 | struct macsec_dev *macsec; | |
4055 | ||
4056 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
4057 | if (macsec->secy.sci == sci) | |
4058 | return true; | |
4059 | } | |
4060 | ||
4061 | return false; | |
4062 | } | |
4063 | ||
e82c649e SD |
4064 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) |
4065 | { | |
4066 | return make_sci(dev->dev_addr, port); | |
4067 | } | |
4068 | ||
c09440f7 SD |
4069 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) |
4070 | { | |
4071 | struct macsec_dev *macsec = macsec_priv(dev); | |
4072 | struct macsec_secy *secy = &macsec->secy; | |
4073 | ||
4074 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); | |
4075 | if (!macsec->stats) | |
4076 | return -ENOMEM; | |
4077 | ||
4078 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); | |
0c0cf3db | 4079 | if (!secy->tx_sc.stats) |
c09440f7 | 4080 | return -ENOMEM; |
c09440f7 | 4081 | |
0a28bfd4 | 4082 | secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL); |
0c0cf3db FP |
4083 | if (!secy->tx_sc.md_dst) |
4084 | /* macsec and secy percpu stats will be freed when unregistering | |
4085 | * net_device in macsec_free_netdev() | |
4086 | */ | |
0a28bfd4 | 4087 | return -ENOMEM; |
0a28bfd4 | 4088 | |
c09440f7 SD |
4089 | if (sci == MACSEC_UNDEF_SCI) |
4090 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
4091 | ||
4092 | secy->netdev = dev; | |
4093 | secy->operational = true; | |
4094 | secy->key_len = DEFAULT_SAK_LEN; | |
4095 | secy->icv_len = icv_len; | |
4096 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; | |
4097 | secy->protect_frames = true; | |
4098 | secy->replay_protect = false; | |
48ef50fa | 4099 | secy->xpn = DEFAULT_XPN; |
c09440f7 SD |
4100 | |
4101 | secy->sci = sci; | |
0a28bfd4 | 4102 | secy->tx_sc.md_dst->u.macsec_info.sci = sci; |
c09440f7 SD |
4103 | secy->tx_sc.active = true; |
4104 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; | |
4105 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; | |
4106 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; | |
4107 | secy->tx_sc.end_station = false; | |
4108 | secy->tx_sc.scb = false; | |
4109 | ||
4110 | return 0; | |
4111 | } | |
4112 | ||
845e0ebb CW |
4113 | static struct lock_class_key macsec_netdev_addr_lock_key; |
4114 | ||
c09440f7 | 4115 | static int macsec_newlink(struct net *net, struct net_device *dev, |
7a3f4a18 MS |
4116 | struct nlattr *tb[], struct nlattr *data[], |
4117 | struct netlink_ext_ack *extack) | |
c09440f7 SD |
4118 | { |
4119 | struct macsec_dev *macsec = macsec_priv(dev); | |
7f327080 | 4120 | rx_handler_func_t *rx_handler; |
b1671253 | 4121 | u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
c09440f7 | 4122 | struct net_device *real_dev; |
7f327080 | 4123 | int err, mtu; |
c09440f7 | 4124 | sci_t sci; |
c09440f7 SD |
4125 | |
4126 | if (!tb[IFLA_LINK]) | |
4127 | return -EINVAL; | |
4128 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
4129 | if (!real_dev) | |
4130 | return -ENODEV; | |
b06d072c WB |
4131 | if (real_dev->type != ARPHRD_ETHER) |
4132 | return -EINVAL; | |
c09440f7 SD |
4133 | |
4134 | dev->priv_flags |= IFF_MACSEC; | |
4135 | ||
4136 | macsec->real_dev = real_dev; | |
4137 | ||
791bb3fc MS |
4138 | if (data && data[IFLA_MACSEC_OFFLOAD]) |
4139 | macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]); | |
4140 | else | |
4141 | /* MACsec offloading is off by default */ | |
4142 | macsec->offload = MACSEC_OFFLOAD_OFF; | |
4143 | ||
4144 | /* Check if the offloading mode is supported by the underlying layers */ | |
4145 | if (macsec->offload != MACSEC_OFFLOAD_OFF && | |
4146 | !macsec_check_offload(macsec->offload, macsec)) | |
4147 | return -EOPNOTSUPP; | |
3cf3227a | 4148 | |
d0cfa548 LN |
4149 | /* send_sci must be set to true when transmit sci explicitly is set */ |
4150 | if ((data && data[IFLA_MACSEC_SCI]) && | |
4151 | (data && data[IFLA_MACSEC_INC_SCI])) { | |
4152 | u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
4153 | ||
4154 | if (!send_sci) | |
4155 | return -EINVAL; | |
4156 | } | |
4157 | ||
c09440f7 SD |
4158 | if (data && data[IFLA_MACSEC_ICV_LEN]) |
4159 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
7f327080 TY |
4160 | mtu = real_dev->mtu - icv_len - macsec_extra_len(true); |
4161 | if (mtu < 0) | |
4162 | dev->mtu = 0; | |
4163 | else | |
4164 | dev->mtu = mtu; | |
c09440f7 SD |
4165 | |
4166 | rx_handler = rtnl_dereference(real_dev->rx_handler); | |
4167 | if (rx_handler && rx_handler != macsec_handle_frame) | |
4168 | return -EBUSY; | |
4169 | ||
4170 | err = register_netdevice(dev); | |
4171 | if (err < 0) | |
4172 | return err; | |
4173 | ||
1a33e10e | 4174 | netdev_lockdep_set_classes(dev); |
be74294f CW |
4175 | lockdep_set_class(&dev->addr_list_lock, |
4176 | &macsec_netdev_addr_lock_key); | |
1a33e10e | 4177 | |
42ab19ee | 4178 | err = netdev_upper_dev_link(real_dev, dev, extack); |
e2003872 | 4179 | if (err < 0) |
bd28899d | 4180 | goto unregister; |
e2003872 | 4181 | |
c09440f7 SD |
4182 | /* need to be already registered so that ->init has run and |
4183 | * the MAC addr is set | |
4184 | */ | |
4185 | if (data && data[IFLA_MACSEC_SCI]) | |
4186 | sci = nla_get_sci(data[IFLA_MACSEC_SCI]); | |
4187 | else if (data && data[IFLA_MACSEC_PORT]) | |
4188 | sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); | |
4189 | else | |
4190 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
4191 | ||
4192 | if (rx_handler && sci_exists(real_dev, sci)) { | |
4193 | err = -EBUSY; | |
e2003872 | 4194 | goto unlink; |
c09440f7 SD |
4195 | } |
4196 | ||
4197 | err = macsec_add_dev(dev, sci, icv_len); | |
4198 | if (err) | |
e2003872 | 4199 | goto unlink; |
c09440f7 | 4200 | |
ccfdec90 FW |
4201 | if (data) { |
4202 | err = macsec_changelink_common(dev, data); | |
4203 | if (err) | |
4204 | goto del_dev; | |
4205 | } | |
c09440f7 | 4206 | |
791bb3fc MS |
4207 | /* If h/w offloading is available, propagate to the device */ |
4208 | if (macsec_is_offloaded(macsec)) { | |
4209 | const struct macsec_ops *ops; | |
4210 | struct macsec_context ctx; | |
4211 | ||
4212 | ops = macsec_get_ops(macsec, &ctx); | |
4213 | if (ops) { | |
4214 | ctx.secy = &macsec->secy; | |
4215 | err = macsec_offload(ops->mdo_add_secy, &ctx); | |
4216 | if (err) | |
4217 | goto del_dev; | |
a73d8779 RPNO |
4218 | |
4219 | macsec->insert_tx_tag = | |
4220 | macsec_needs_tx_tag(macsec, ops); | |
791bb3fc MS |
4221 | } |
4222 | } | |
4223 | ||
c09440f7 SD |
4224 | err = register_macsec_dev(real_dev, dev); |
4225 | if (err < 0) | |
4226 | goto del_dev; | |
4227 | ||
e6ac0758 SD |
4228 | netif_stacked_transfer_operstate(real_dev, dev); |
4229 | linkwatch_fire_event(dev); | |
4230 | ||
96cfc505 SD |
4231 | macsec_generation++; |
4232 | ||
c09440f7 SD |
4233 | return 0; |
4234 | ||
4235 | del_dev: | |
4236 | macsec_del_dev(macsec); | |
e2003872 SD |
4237 | unlink: |
4238 | netdev_upper_dev_unlink(real_dev, dev); | |
bd28899d | 4239 | unregister: |
c09440f7 SD |
4240 | unregister_netdevice(dev); |
4241 | return err; | |
4242 | } | |
4243 | ||
a8b8a889 MS |
4244 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[], |
4245 | struct netlink_ext_ack *extack) | |
c09440f7 | 4246 | { |
74816480 | 4247 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
b1671253 | 4248 | u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
c09440f7 SD |
4249 | int flag; |
4250 | bool es, scb, sci; | |
4251 | ||
4252 | if (!data) | |
4253 | return 0; | |
4254 | ||
4255 | if (data[IFLA_MACSEC_CIPHER_SUITE]) | |
4256 | csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); | |
4257 | ||
f04c392d | 4258 | if (data[IFLA_MACSEC_ICV_LEN]) { |
c09440f7 | 4259 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
b1671253 | 4260 | if (icv_len != MACSEC_DEFAULT_ICV_LEN) { |
f04c392d DC |
4261 | char dummy_key[DEFAULT_SAK_LEN] = { 0 }; |
4262 | struct crypto_aead *dummy_tfm; | |
4263 | ||
4264 | dummy_tfm = macsec_alloc_tfm(dummy_key, | |
4265 | DEFAULT_SAK_LEN, | |
4266 | icv_len); | |
4267 | if (IS_ERR(dummy_tfm)) | |
4268 | return PTR_ERR(dummy_tfm); | |
4269 | crypto_free_aead(dummy_tfm); | |
4270 | } | |
4271 | } | |
c09440f7 SD |
4272 | |
4273 | switch (csid) { | |
ccfdec90 FW |
4274 | case MACSEC_CIPHER_ID_GCM_AES_128: |
4275 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
48ef50fa EM |
4276 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: |
4277 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: | |
e8660ded | 4278 | case MACSEC_DEFAULT_CIPHER_ID: |
c09440f7 | 4279 | if (icv_len < MACSEC_MIN_ICV_LEN || |
2ccbe2cb | 4280 | icv_len > MACSEC_STD_ICV_LEN) |
c09440f7 SD |
4281 | return -EINVAL; |
4282 | break; | |
4283 | default: | |
4284 | return -EINVAL; | |
4285 | } | |
4286 | ||
4287 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
4288 | if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) | |
4289 | return -EINVAL; | |
4290 | } | |
4291 | ||
4292 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; | |
4293 | flag < IFLA_MACSEC_VALIDATION; | |
4294 | flag++) { | |
4295 | if (data[flag]) { | |
4296 | if (nla_get_u8(data[flag]) > 1) | |
4297 | return -EINVAL; | |
4298 | } | |
4299 | } | |
4300 | ||
4301 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; | |
4302 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; | |
4303 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; | |
4304 | ||
4305 | if ((sci && (scb || es)) || (scb && es)) | |
4306 | return -EINVAL; | |
4307 | ||
4308 | if (data[IFLA_MACSEC_VALIDATION] && | |
4309 | nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) | |
4310 | return -EINVAL; | |
4311 | ||
4b1fb935 SD |
4312 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
4313 | nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && | |
c09440f7 SD |
4314 | !data[IFLA_MACSEC_WINDOW]) |
4315 | return -EINVAL; | |
4316 | ||
4317 | return 0; | |
4318 | } | |
4319 | ||
4320 | static struct net *macsec_get_link_net(const struct net_device *dev) | |
4321 | { | |
4322 | return dev_net(macsec_priv(dev)->real_dev); | |
4323 | } | |
4324 | ||
f132fdd9 PH |
4325 | struct net_device *macsec_get_real_dev(const struct net_device *dev) |
4326 | { | |
4327 | return macsec_priv(dev)->real_dev; | |
4328 | } | |
4329 | EXPORT_SYMBOL_GPL(macsec_get_real_dev); | |
4330 | ||
4331 | bool macsec_netdev_is_offloaded(struct net_device *dev) | |
4332 | { | |
4333 | return macsec_is_offloaded(macsec_priv(dev)); | |
4334 | } | |
4335 | EXPORT_SYMBOL_GPL(macsec_netdev_is_offloaded); | |
4336 | ||
c09440f7 SD |
4337 | static size_t macsec_get_size(const struct net_device *dev) |
4338 | { | |
c9fba3ed ZS |
4339 | return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */ |
4340 | nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */ | |
4341 | nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */ | |
4342 | nla_total_size(4) + /* IFLA_MACSEC_WINDOW */ | |
4343 | nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */ | |
4344 | nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */ | |
4345 | nla_total_size(1) + /* IFLA_MACSEC_PROTECT */ | |
4346 | nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */ | |
4347 | nla_total_size(1) + /* IFLA_MACSEC_ES */ | |
4348 | nla_total_size(1) + /* IFLA_MACSEC_SCB */ | |
4349 | nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */ | |
4350 | nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */ | |
723e8a48 | 4351 | nla_total_size(1) + /* IFLA_MACSEC_OFFLOAD */ |
c09440f7 SD |
4352 | 0; |
4353 | } | |
4354 | ||
4355 | static int macsec_fill_info(struct sk_buff *skb, | |
4356 | const struct net_device *dev) | |
4357 | { | |
723e8a48 EH |
4358 | struct macsec_tx_sc *tx_sc; |
4359 | struct macsec_dev *macsec; | |
4360 | struct macsec_secy *secy; | |
ccfdec90 FW |
4361 | u64 csid; |
4362 | ||
723e8a48 EH |
4363 | macsec = macsec_priv(dev); |
4364 | secy = &macsec->secy; | |
4365 | tx_sc = &secy->tx_sc; | |
4366 | ||
ccfdec90 FW |
4367 | switch (secy->key_len) { |
4368 | case MACSEC_GCM_AES_128_SAK_LEN: | |
48ef50fa | 4369 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
4370 | break; |
4371 | case MACSEC_GCM_AES_256_SAK_LEN: | |
48ef50fa | 4372 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
ccfdec90 FW |
4373 | break; |
4374 | default: | |
4375 | goto nla_put_failure; | |
4376 | } | |
c09440f7 | 4377 | |
f60d94c0 ND |
4378 | if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
4379 | IFLA_MACSEC_PAD) || | |
c09440f7 | 4380 | nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
f60d94c0 | 4381 | nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
ccfdec90 | 4382 | csid, IFLA_MACSEC_PAD) || |
c09440f7 SD |
4383 | nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
4384 | nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || | |
4385 | nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || | |
4386 | nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || | |
4387 | nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || | |
4388 | nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || | |
4389 | nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || | |
4390 | nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || | |
723e8a48 | 4391 | nla_put_u8(skb, IFLA_MACSEC_OFFLOAD, macsec->offload) || |
c09440f7 SD |
4392 | 0) |
4393 | goto nla_put_failure; | |
4394 | ||
4395 | if (secy->replay_protect) { | |
4396 | if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) | |
4397 | goto nla_put_failure; | |
4398 | } | |
4399 | ||
4400 | return 0; | |
4401 | ||
4402 | nla_put_failure: | |
4403 | return -EMSGSIZE; | |
4404 | } | |
4405 | ||
4406 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { | |
4407 | .kind = "macsec", | |
4408 | .priv_size = sizeof(struct macsec_dev), | |
4409 | .maxtype = IFLA_MACSEC_MAX, | |
4410 | .policy = macsec_rtnl_policy, | |
4411 | .setup = macsec_setup, | |
4412 | .validate = macsec_validate_attr, | |
4413 | .newlink = macsec_newlink, | |
4414 | .changelink = macsec_changelink, | |
4415 | .dellink = macsec_dellink, | |
4416 | .get_size = macsec_get_size, | |
4417 | .fill_info = macsec_fill_info, | |
4418 | .get_link_net = macsec_get_link_net, | |
4419 | }; | |
4420 | ||
4421 | static bool is_macsec_master(struct net_device *dev) | |
4422 | { | |
4423 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; | |
4424 | } | |
4425 | ||
4426 | static int macsec_notify(struct notifier_block *this, unsigned long event, | |
4427 | void *ptr) | |
4428 | { | |
4429 | struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); | |
4430 | LIST_HEAD(head); | |
4431 | ||
4432 | if (!is_macsec_master(real_dev)) | |
4433 | return NOTIFY_DONE; | |
4434 | ||
4435 | switch (event) { | |
e6ac0758 SD |
4436 | case NETDEV_DOWN: |
4437 | case NETDEV_UP: | |
4438 | case NETDEV_CHANGE: { | |
4439 | struct macsec_dev *m, *n; | |
4440 | struct macsec_rxh_data *rxd; | |
4441 | ||
4442 | rxd = macsec_data_rtnl(real_dev); | |
4443 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
4444 | struct net_device *dev = m->secy.netdev; | |
4445 | ||
4446 | netif_stacked_transfer_operstate(real_dev, dev); | |
4447 | } | |
4448 | break; | |
4449 | } | |
c09440f7 SD |
4450 | case NETDEV_UNREGISTER: { |
4451 | struct macsec_dev *m, *n; | |
4452 | struct macsec_rxh_data *rxd; | |
4453 | ||
4454 | rxd = macsec_data_rtnl(real_dev); | |
4455 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
bbe11fab | 4456 | macsec_common_dellink(m->secy.netdev, &head); |
c09440f7 | 4457 | } |
bbe11fab SD |
4458 | |
4459 | netdev_rx_handler_unregister(real_dev); | |
4460 | kfree(rxd); | |
4461 | ||
c09440f7 SD |
4462 | unregister_netdevice_many(&head); |
4463 | break; | |
4464 | } | |
4465 | case NETDEV_CHANGEMTU: { | |
4466 | struct macsec_dev *m; | |
4467 | struct macsec_rxh_data *rxd; | |
4468 | ||
4469 | rxd = macsec_data_rtnl(real_dev); | |
4470 | list_for_each_entry(m, &rxd->secys, secys) { | |
4471 | struct net_device *dev = m->secy.netdev; | |
4472 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + | |
4473 | macsec_extra_len(true)); | |
4474 | ||
4475 | if (dev->mtu > mtu) | |
4476 | dev_set_mtu(dev, mtu); | |
4477 | } | |
4478 | } | |
4479 | } | |
4480 | ||
4481 | return NOTIFY_OK; | |
4482 | } | |
4483 | ||
4484 | static struct notifier_block macsec_notifier = { | |
4485 | .notifier_call = macsec_notify, | |
4486 | }; | |
4487 | ||
4488 | static int __init macsec_init(void) | |
4489 | { | |
4490 | int err; | |
4491 | ||
4492 | pr_info("MACsec IEEE 802.1AE\n"); | |
4493 | err = register_netdevice_notifier(&macsec_notifier); | |
4494 | if (err) | |
4495 | return err; | |
4496 | ||
4497 | err = rtnl_link_register(&macsec_link_ops); | |
4498 | if (err) | |
4499 | goto notifier; | |
4500 | ||
489111e5 | 4501 | err = genl_register_family(&macsec_fam); |
c09440f7 SD |
4502 | if (err) |
4503 | goto rtnl; | |
4504 | ||
4505 | return 0; | |
4506 | ||
4507 | rtnl: | |
4508 | rtnl_link_unregister(&macsec_link_ops); | |
4509 | notifier: | |
4510 | unregister_netdevice_notifier(&macsec_notifier); | |
4511 | return err; | |
4512 | } | |
4513 | ||
4514 | static void __exit macsec_exit(void) | |
4515 | { | |
4516 | genl_unregister_family(&macsec_fam); | |
4517 | rtnl_link_unregister(&macsec_link_ops); | |
4518 | unregister_netdevice_notifier(&macsec_notifier); | |
b196c22a | 4519 | rcu_barrier(); |
c09440f7 SD |
4520 | } |
4521 | ||
4522 | module_init(macsec_init); | |
4523 | module_exit(macsec_exit); | |
4524 | ||
4525 | MODULE_ALIAS_RTNL_LINK("macsec"); | |
78362998 | 4526 | MODULE_ALIAS_GENL_FAMILY("macsec"); |
c09440f7 SD |
4527 | |
4528 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); | |
4529 | MODULE_LICENSE("GPL v2"); |