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 |
c09440f7 SD |
96 | */ |
97 | struct macsec_dev { | |
98 | struct macsec_secy secy; | |
99 | struct net_device *real_dev; | |
196a888c | 100 | netdevice_tracker dev_tracker; |
c09440f7 SD |
101 | struct pcpu_secy_stats __percpu *stats; |
102 | struct list_head secys; | |
5491e7c6 | 103 | struct gro_cells gro_cells; |
3cf3227a | 104 | enum macsec_offload offload; |
c09440f7 SD |
105 | }; |
106 | ||
107 | /** | |
108 | * struct macsec_rxh_data - rx_handler private argument | |
109 | * @secys: linked list of SecY's on this underlying device | |
110 | */ | |
111 | struct macsec_rxh_data { | |
112 | struct list_head secys; | |
113 | }; | |
114 | ||
115 | static struct macsec_dev *macsec_priv(const struct net_device *dev) | |
116 | { | |
117 | return (struct macsec_dev *)netdev_priv(dev); | |
118 | } | |
119 | ||
120 | static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) | |
121 | { | |
122 | return rcu_dereference_bh(dev->rx_handler_data); | |
123 | } | |
124 | ||
125 | static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) | |
126 | { | |
127 | return rtnl_dereference(dev->rx_handler_data); | |
128 | } | |
129 | ||
130 | struct macsec_cb { | |
131 | struct aead_request *req; | |
132 | union { | |
133 | struct macsec_tx_sa *tx_sa; | |
134 | struct macsec_rx_sa *rx_sa; | |
135 | }; | |
136 | u8 assoc_num; | |
137 | bool valid; | |
138 | bool has_sci; | |
139 | }; | |
140 | ||
141 | static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) | |
142 | { | |
143 | struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); | |
144 | ||
145 | if (!sa || !sa->active) | |
146 | return NULL; | |
147 | ||
e187246f | 148 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
149 | return NULL; |
150 | ||
151 | return sa; | |
152 | } | |
153 | ||
91ec9bd5 CY |
154 | static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc) |
155 | { | |
156 | struct macsec_rx_sa *sa = NULL; | |
157 | int an; | |
158 | ||
159 | for (an = 0; an < MACSEC_NUM_AN; an++) { | |
160 | sa = macsec_rxsa_get(rx_sc->sa[an]); | |
161 | if (sa) | |
162 | break; | |
163 | } | |
164 | return sa; | |
165 | } | |
166 | ||
c09440f7 SD |
167 | static void free_rx_sc_rcu(struct rcu_head *head) |
168 | { | |
169 | struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); | |
170 | ||
171 | free_percpu(rx_sc->stats); | |
172 | kfree(rx_sc); | |
173 | } | |
174 | ||
175 | static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) | |
176 | { | |
8676d76f | 177 | return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL; |
c09440f7 SD |
178 | } |
179 | ||
180 | static void macsec_rxsc_put(struct macsec_rx_sc *sc) | |
181 | { | |
8676d76f | 182 | if (refcount_dec_and_test(&sc->refcnt)) |
c09440f7 SD |
183 | call_rcu(&sc->rcu_head, free_rx_sc_rcu); |
184 | } | |
185 | ||
186 | static void free_rxsa(struct rcu_head *head) | |
187 | { | |
188 | struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); | |
189 | ||
190 | crypto_free_aead(sa->key.tfm); | |
191 | free_percpu(sa->stats); | |
c09440f7 SD |
192 | kfree(sa); |
193 | } | |
194 | ||
195 | static void macsec_rxsa_put(struct macsec_rx_sa *sa) | |
196 | { | |
e187246f | 197 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
198 | call_rcu(&sa->rcu, free_rxsa); |
199 | } | |
200 | ||
201 | static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) | |
202 | { | |
203 | struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); | |
204 | ||
205 | if (!sa || !sa->active) | |
206 | return NULL; | |
207 | ||
28206cdb | 208 | if (!refcount_inc_not_zero(&sa->refcnt)) |
c09440f7 SD |
209 | return NULL; |
210 | ||
211 | return sa; | |
212 | } | |
213 | ||
214 | static void free_txsa(struct rcu_head *head) | |
215 | { | |
216 | struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); | |
217 | ||
218 | crypto_free_aead(sa->key.tfm); | |
219 | free_percpu(sa->stats); | |
220 | kfree(sa); | |
221 | } | |
222 | ||
223 | static void macsec_txsa_put(struct macsec_tx_sa *sa) | |
224 | { | |
28206cdb | 225 | if (refcount_dec_and_test(&sa->refcnt)) |
c09440f7 SD |
226 | call_rcu(&sa->rcu, free_txsa); |
227 | } | |
228 | ||
229 | static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) | |
230 | { | |
231 | BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); | |
232 | return (struct macsec_cb *)skb->cb; | |
233 | } | |
234 | ||
c09440f7 SD |
235 | #define MACSEC_PORT_SCB (0x0000) |
236 | #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) | |
48ef50fa | 237 | #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff) |
c09440f7 | 238 | |
ccfdec90 FW |
239 | #define MACSEC_GCM_AES_128_SAK_LEN 16 |
240 | #define MACSEC_GCM_AES_256_SAK_LEN 32 | |
241 | ||
ccfdec90 | 242 | #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN |
48ef50fa | 243 | #define DEFAULT_XPN false |
c09440f7 SD |
244 | #define DEFAULT_SEND_SCI true |
245 | #define DEFAULT_ENCRYPT false | |
246 | #define DEFAULT_ENCODING_SA 0 | |
b07a0e20 | 247 | #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1)) |
c09440f7 | 248 | |
8bc7823e | 249 | static sci_t make_sci(const u8 *addr, __be16 port) |
c09440f7 SD |
250 | { |
251 | sci_t sci; | |
252 | ||
253 | memcpy(&sci, addr, ETH_ALEN); | |
254 | memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port)); | |
255 | ||
256 | return sci; | |
257 | } | |
258 | ||
259 | static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present) | |
260 | { | |
261 | sci_t sci; | |
262 | ||
263 | if (sci_present) | |
264 | memcpy(&sci, hdr->secure_channel_id, | |
265 | sizeof(hdr->secure_channel_id)); | |
266 | else | |
267 | sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES); | |
268 | ||
269 | return sci; | |
270 | } | |
271 | ||
272 | static unsigned int macsec_sectag_len(bool sci_present) | |
273 | { | |
274 | return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0); | |
275 | } | |
276 | ||
277 | static unsigned int macsec_hdr_len(bool sci_present) | |
278 | { | |
279 | return macsec_sectag_len(sci_present) + ETH_HLEN; | |
280 | } | |
281 | ||
282 | static unsigned int macsec_extra_len(bool sci_present) | |
283 | { | |
284 | return macsec_sectag_len(sci_present) + sizeof(__be16); | |
285 | } | |
286 | ||
287 | /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */ | |
288 | static void macsec_fill_sectag(struct macsec_eth_header *h, | |
e0f841f5 TB |
289 | const struct macsec_secy *secy, u32 pn, |
290 | bool sci_present) | |
c09440f7 SD |
291 | { |
292 | const struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
293 | ||
e0f841f5 | 294 | memset(&h->tci_an, 0, macsec_sectag_len(sci_present)); |
c09440f7 SD |
295 | h->eth.h_proto = htons(ETH_P_MACSEC); |
296 | ||
e0f841f5 | 297 | if (sci_present) { |
c09440f7 SD |
298 | h->tci_an |= MACSEC_TCI_SC; |
299 | memcpy(&h->secure_channel_id, &secy->sci, | |
300 | sizeof(h->secure_channel_id)); | |
301 | } else { | |
302 | if (tx_sc->end_station) | |
303 | h->tci_an |= MACSEC_TCI_ES; | |
304 | if (tx_sc->scb) | |
305 | h->tci_an |= MACSEC_TCI_SCB; | |
306 | } | |
307 | ||
308 | h->packet_number = htonl(pn); | |
309 | ||
310 | /* with GCM, C/E clear for !encrypt, both set for encrypt */ | |
311 | if (tx_sc->encrypt) | |
312 | h->tci_an |= MACSEC_TCI_CONFID; | |
b1671253 | 313 | else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN) |
c09440f7 SD |
314 | h->tci_an |= MACSEC_TCI_C; |
315 | ||
316 | h->tci_an |= tx_sc->encoding_sa; | |
317 | } | |
318 | ||
319 | static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len) | |
320 | { | |
321 | if (data_len < MIN_NON_SHORT_LEN) | |
322 | h->short_length = data_len; | |
323 | } | |
324 | ||
3cf3227a AT |
325 | /* Checks if a MACsec interface is being offloaded to an hardware engine */ |
326 | static bool macsec_is_offloaded(struct macsec_dev *macsec) | |
327 | { | |
21114b7f AT |
328 | if (macsec->offload == MACSEC_OFFLOAD_MAC || |
329 | macsec->offload == MACSEC_OFFLOAD_PHY) | |
3cf3227a AT |
330 | return true; |
331 | ||
332 | return false; | |
333 | } | |
334 | ||
335 | /* Checks if underlying layers implement MACsec offloading functions. */ | |
336 | static bool macsec_check_offload(enum macsec_offload offload, | |
337 | struct macsec_dev *macsec) | |
338 | { | |
339 | if (!macsec || !macsec->real_dev) | |
340 | return false; | |
341 | ||
342 | if (offload == MACSEC_OFFLOAD_PHY) | |
343 | return macsec->real_dev->phydev && | |
344 | macsec->real_dev->phydev->macsec_ops; | |
21114b7f AT |
345 | else if (offload == MACSEC_OFFLOAD_MAC) |
346 | return macsec->real_dev->features & NETIF_F_HW_MACSEC && | |
347 | macsec->real_dev->macsec_ops; | |
3cf3227a AT |
348 | |
349 | return false; | |
350 | } | |
351 | ||
352 | static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload, | |
353 | struct macsec_dev *macsec, | |
354 | struct macsec_context *ctx) | |
355 | { | |
356 | if (ctx) { | |
357 | memset(ctx, 0, sizeof(*ctx)); | |
358 | ctx->offload = offload; | |
359 | ||
360 | if (offload == MACSEC_OFFLOAD_PHY) | |
361 | ctx->phydev = macsec->real_dev->phydev; | |
21114b7f AT |
362 | else if (offload == MACSEC_OFFLOAD_MAC) |
363 | ctx->netdev = macsec->real_dev; | |
3cf3227a AT |
364 | } |
365 | ||
21114b7f AT |
366 | if (offload == MACSEC_OFFLOAD_PHY) |
367 | return macsec->real_dev->phydev->macsec_ops; | |
368 | else | |
369 | return macsec->real_dev->macsec_ops; | |
3cf3227a AT |
370 | } |
371 | ||
372 | /* Returns a pointer to the MACsec ops struct if any and updates the MACsec | |
373 | * context device reference if provided. | |
374 | */ | |
375 | static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec, | |
376 | struct macsec_context *ctx) | |
377 | { | |
378 | if (!macsec_check_offload(macsec->offload, macsec)) | |
379 | return NULL; | |
380 | ||
381 | return __macsec_get_ops(macsec->offload, macsec, ctx); | |
382 | } | |
383 | ||
a21ecf0e EM |
384 | /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */ |
385 | static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn) | |
c09440f7 SD |
386 | { |
387 | struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data; | |
388 | int len = skb->len - 2 * ETH_ALEN; | |
389 | int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len; | |
390 | ||
391 | /* a) It comprises at least 17 octets */ | |
392 | if (skb->len <= 16) | |
393 | return false; | |
394 | ||
395 | /* b) MACsec EtherType: already checked */ | |
396 | ||
397 | /* c) V bit is clear */ | |
398 | if (h->tci_an & MACSEC_TCI_VERSION) | |
399 | return false; | |
400 | ||
401 | /* d) ES or SCB => !SC */ | |
402 | if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) && | |
403 | (h->tci_an & MACSEC_TCI_SC)) | |
404 | return false; | |
405 | ||
406 | /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */ | |
407 | if (h->unused) | |
408 | return false; | |
409 | ||
a21ecf0e EM |
410 | /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */ |
411 | if (!h->packet_number && !xpn) | |
c09440f7 SD |
412 | return false; |
413 | ||
414 | /* length check, f) g) h) i) */ | |
415 | if (h->short_length) | |
416 | return len == extra_len + h->short_length; | |
417 | return len >= extra_len + MIN_NON_SHORT_LEN; | |
418 | } | |
419 | ||
420 | #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true)) | |
2ccbe2cb | 421 | #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN |
c09440f7 | 422 | |
a21ecf0e EM |
423 | static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn, |
424 | salt_t salt) | |
425 | { | |
426 | struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv; | |
427 | ||
428 | gcm_iv->ssci = ssci ^ salt.ssci; | |
429 | gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn; | |
430 | } | |
431 | ||
c09440f7 SD |
432 | static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn) |
433 | { | |
434 | struct gcm_iv *gcm_iv = (struct gcm_iv *)iv; | |
435 | ||
436 | gcm_iv->sci = sci; | |
437 | gcm_iv->pn = htonl(pn); | |
438 | } | |
439 | ||
440 | static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) | |
441 | { | |
442 | return (struct macsec_eth_header *)skb_mac_header(skb); | |
443 | } | |
444 | ||
5c937de7 AT |
445 | static void __macsec_pn_wrapped(struct macsec_secy *secy, |
446 | struct macsec_tx_sa *tx_sa) | |
447 | { | |
448 | pr_debug("PN wrapped, transitioning to !oper\n"); | |
449 | tx_sa->active = false; | |
450 | if (secy->protect_frames) | |
451 | secy->operational = false; | |
452 | } | |
453 | ||
454 | void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa) | |
455 | { | |
456 | spin_lock_bh(&tx_sa->lock); | |
457 | __macsec_pn_wrapped(secy, tx_sa); | |
458 | spin_unlock_bh(&tx_sa->lock); | |
459 | } | |
460 | EXPORT_SYMBOL_GPL(macsec_pn_wrapped); | |
461 | ||
a21ecf0e EM |
462 | static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa, |
463 | struct macsec_secy *secy) | |
c09440f7 | 464 | { |
a21ecf0e | 465 | pn_t pn; |
c09440f7 SD |
466 | |
467 | spin_lock_bh(&tx_sa->lock); | |
c09440f7 | 468 | |
a21ecf0e EM |
469 | pn = tx_sa->next_pn_halves; |
470 | if (secy->xpn) | |
471 | tx_sa->next_pn++; | |
472 | else | |
473 | tx_sa->next_pn_halves.lower++; | |
474 | ||
5c937de7 AT |
475 | if (tx_sa->next_pn == 0) |
476 | __macsec_pn_wrapped(secy, tx_sa); | |
c09440f7 SD |
477 | spin_unlock_bh(&tx_sa->lock); |
478 | ||
479 | return pn; | |
480 | } | |
481 | ||
482 | static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) | |
483 | { | |
484 | struct macsec_dev *macsec = netdev_priv(dev); | |
485 | ||
486 | skb->dev = macsec->real_dev; | |
487 | skb_reset_mac_header(skb); | |
488 | skb->protocol = eth_hdr(skb)->h_proto; | |
489 | } | |
490 | ||
91ec9bd5 CY |
491 | static unsigned int macsec_msdu_len(struct sk_buff *skb) |
492 | { | |
493 | struct macsec_dev *macsec = macsec_priv(skb->dev); | |
494 | struct macsec_secy *secy = &macsec->secy; | |
495 | bool sci_present = macsec_skb_cb(skb)->has_sci; | |
496 | ||
497 | return skb->len - macsec_hdr_len(sci_present) - secy->icv_len; | |
498 | } | |
499 | ||
c09440f7 SD |
500 | static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, |
501 | struct macsec_tx_sa *tx_sa) | |
502 | { | |
91ec9bd5 | 503 | unsigned int msdu_len = macsec_msdu_len(skb); |
c09440f7 SD |
504 | struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); |
505 | ||
506 | u64_stats_update_begin(&txsc_stats->syncp); | |
507 | if (tx_sc->encrypt) { | |
91ec9bd5 | 508 | txsc_stats->stats.OutOctetsEncrypted += msdu_len; |
c09440f7 SD |
509 | txsc_stats->stats.OutPktsEncrypted++; |
510 | this_cpu_inc(tx_sa->stats->OutPktsEncrypted); | |
511 | } else { | |
91ec9bd5 | 512 | txsc_stats->stats.OutOctetsProtected += msdu_len; |
c09440f7 SD |
513 | txsc_stats->stats.OutPktsProtected++; |
514 | this_cpu_inc(tx_sa->stats->OutPktsProtected); | |
515 | } | |
516 | u64_stats_update_end(&txsc_stats->syncp); | |
517 | } | |
518 | ||
519 | static void count_tx(struct net_device *dev, int ret, int len) | |
520 | { | |
521 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
522 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
523 | ||
524 | u64_stats_update_begin(&stats->syncp); | |
9962acef ED |
525 | u64_stats_inc(&stats->tx_packets); |
526 | u64_stats_add(&stats->tx_bytes, len); | |
c09440f7 | 527 | u64_stats_update_end(&stats->syncp); |
c09440f7 SD |
528 | } |
529 | } | |
530 | ||
23b8b93b | 531 | static void macsec_encrypt_done(void *data, int err) |
c09440f7 | 532 | { |
23b8b93b | 533 | struct sk_buff *skb = data; |
c09440f7 SD |
534 | struct net_device *dev = skb->dev; |
535 | struct macsec_dev *macsec = macsec_priv(dev); | |
536 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; | |
537 | int len, ret; | |
538 | ||
539 | aead_request_free(macsec_skb_cb(skb)->req); | |
540 | ||
541 | rcu_read_lock_bh(); | |
c09440f7 | 542 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); |
91ec9bd5 CY |
543 | /* packet is encrypted/protected so tx_bytes must be calculated */ |
544 | len = macsec_msdu_len(skb) + 2 * ETH_ALEN; | |
545 | macsec_encrypt_finish(skb, dev); | |
c09440f7 SD |
546 | ret = dev_queue_xmit(skb); |
547 | count_tx(dev, ret, len); | |
548 | rcu_read_unlock_bh(); | |
549 | ||
550 | macsec_txsa_put(sa); | |
551 | dev_put(dev); | |
552 | } | |
553 | ||
5d9649b3 SD |
554 | static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
555 | unsigned char **iv, | |
5294b830 JD |
556 | struct scatterlist **sg, |
557 | int num_frags) | |
5d9649b3 SD |
558 | { |
559 | size_t size, iv_offset, sg_offset; | |
560 | struct aead_request *req; | |
561 | void *tmp; | |
562 | ||
563 | size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); | |
564 | iv_offset = size; | |
565 | size += GCM_AES_IV_LEN; | |
566 | ||
567 | size = ALIGN(size, __alignof__(struct scatterlist)); | |
568 | sg_offset = size; | |
5294b830 | 569 | size += sizeof(struct scatterlist) * num_frags; |
5d9649b3 SD |
570 | |
571 | tmp = kmalloc(size, GFP_ATOMIC); | |
572 | if (!tmp) | |
573 | return NULL; | |
574 | ||
575 | *iv = (unsigned char *)(tmp + iv_offset); | |
576 | *sg = (struct scatterlist *)(tmp + sg_offset); | |
577 | req = tmp; | |
578 | ||
579 | aead_request_set_tfm(req, tfm); | |
580 | ||
581 | return req; | |
582 | } | |
583 | ||
c09440f7 SD |
584 | static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
585 | struct net_device *dev) | |
586 | { | |
587 | int ret; | |
5d9649b3 | 588 | struct scatterlist *sg; |
5294b830 | 589 | struct sk_buff *trailer; |
5d9649b3 | 590 | unsigned char *iv; |
c09440f7 SD |
591 | struct ethhdr *eth; |
592 | struct macsec_eth_header *hh; | |
593 | size_t unprotected_len; | |
594 | struct aead_request *req; | |
595 | struct macsec_secy *secy; | |
596 | struct macsec_tx_sc *tx_sc; | |
597 | struct macsec_tx_sa *tx_sa; | |
598 | struct macsec_dev *macsec = macsec_priv(dev); | |
e0f841f5 | 599 | bool sci_present; |
a21ecf0e | 600 | pn_t pn; |
c09440f7 SD |
601 | |
602 | secy = &macsec->secy; | |
603 | tx_sc = &secy->tx_sc; | |
604 | ||
605 | /* 10.5.1 TX SA assignment */ | |
606 | tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]); | |
607 | if (!tx_sa) { | |
608 | secy->operational = false; | |
609 | kfree_skb(skb); | |
610 | return ERR_PTR(-EINVAL); | |
611 | } | |
612 | ||
613 | if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || | |
614 | skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { | |
615 | struct sk_buff *nskb = skb_copy_expand(skb, | |
616 | MACSEC_NEEDED_HEADROOM, | |
617 | MACSEC_NEEDED_TAILROOM, | |
618 | GFP_ATOMIC); | |
619 | if (likely(nskb)) { | |
620 | consume_skb(skb); | |
621 | skb = nskb; | |
622 | } else { | |
623 | macsec_txsa_put(tx_sa); | |
624 | kfree_skb(skb); | |
625 | return ERR_PTR(-ENOMEM); | |
626 | } | |
627 | } else { | |
628 | skb = skb_unshare(skb, GFP_ATOMIC); | |
629 | if (!skb) { | |
630 | macsec_txsa_put(tx_sa); | |
631 | return ERR_PTR(-ENOMEM); | |
632 | } | |
633 | } | |
634 | ||
635 | unprotected_len = skb->len; | |
636 | eth = eth_hdr(skb); | |
b1671253 | 637 | sci_present = macsec_send_sci(secy); |
d58ff351 | 638 | hh = skb_push(skb, macsec_extra_len(sci_present)); |
c09440f7 SD |
639 | memmove(hh, eth, 2 * ETH_ALEN); |
640 | ||
641 | pn = tx_sa_update_pn(tx_sa, secy); | |
a21ecf0e | 642 | if (pn.full64 == 0) { |
c09440f7 SD |
643 | macsec_txsa_put(tx_sa); |
644 | kfree_skb(skb); | |
645 | return ERR_PTR(-ENOLINK); | |
646 | } | |
a21ecf0e | 647 | macsec_fill_sectag(hh, secy, pn.lower, sci_present); |
c09440f7 SD |
648 | macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN); |
649 | ||
c09440f7 SD |
650 | skb_put(skb, secy->icv_len); |
651 | ||
652 | if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { | |
653 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
654 | ||
655 | u64_stats_update_begin(&secy_stats->syncp); | |
656 | secy_stats->stats.OutPktsTooLong++; | |
657 | u64_stats_update_end(&secy_stats->syncp); | |
658 | ||
659 | macsec_txsa_put(tx_sa); | |
660 | kfree_skb(skb); | |
661 | return ERR_PTR(-EINVAL); | |
662 | } | |
663 | ||
5294b830 JD |
664 | ret = skb_cow_data(skb, 0, &trailer); |
665 | if (unlikely(ret < 0)) { | |
666 | macsec_txsa_put(tx_sa); | |
667 | kfree_skb(skb); | |
668 | return ERR_PTR(ret); | |
669 | } | |
670 | ||
671 | req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
672 | if (!req) { |
673 | macsec_txsa_put(tx_sa); | |
674 | kfree_skb(skb); | |
675 | return ERR_PTR(-ENOMEM); | |
676 | } | |
677 | ||
a21ecf0e EM |
678 | if (secy->xpn) |
679 | macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt); | |
680 | else | |
681 | macsec_fill_iv(iv, secy->sci, pn.lower); | |
5d9649b3 | 682 | |
5294b830 | 683 | sg_init_table(sg, ret); |
cda7ea69 JD |
684 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
685 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 686 | aead_request_free(req); |
cda7ea69 JD |
687 | macsec_txsa_put(tx_sa); |
688 | kfree_skb(skb); | |
689 | return ERR_PTR(ret); | |
690 | } | |
c09440f7 SD |
691 | |
692 | if (tx_sc->encrypt) { | |
e0f841f5 | 693 | int len = skb->len - macsec_hdr_len(sci_present) - |
c09440f7 SD |
694 | secy->icv_len; |
695 | aead_request_set_crypt(req, sg, sg, len, iv); | |
e0f841f5 | 696 | aead_request_set_ad(req, macsec_hdr_len(sci_present)); |
c09440f7 SD |
697 | } else { |
698 | aead_request_set_crypt(req, sg, sg, 0, iv); | |
699 | aead_request_set_ad(req, skb->len - secy->icv_len); | |
700 | } | |
701 | ||
702 | macsec_skb_cb(skb)->req = req; | |
703 | macsec_skb_cb(skb)->tx_sa = tx_sa; | |
91ec9bd5 | 704 | macsec_skb_cb(skb)->has_sci = sci_present; |
c09440f7 SD |
705 | aead_request_set_callback(req, 0, macsec_encrypt_done, skb); |
706 | ||
707 | dev_hold(skb->dev); | |
708 | ret = crypto_aead_encrypt(req); | |
709 | if (ret == -EINPROGRESS) { | |
710 | return ERR_PTR(ret); | |
711 | } else if (ret != 0) { | |
712 | dev_put(skb->dev); | |
713 | kfree_skb(skb); | |
714 | aead_request_free(req); | |
715 | macsec_txsa_put(tx_sa); | |
716 | return ERR_PTR(-EINVAL); | |
717 | } | |
718 | ||
719 | dev_put(skb->dev); | |
720 | aead_request_free(req); | |
721 | macsec_txsa_put(tx_sa); | |
722 | ||
723 | return skb; | |
724 | } | |
725 | ||
726 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) | |
727 | { | |
728 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
729 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); | |
730 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); | |
731 | u32 lowest_pn = 0; | |
732 | ||
733 | spin_lock(&rx_sa->lock); | |
a21ecf0e EM |
734 | if (rx_sa->next_pn_halves.lower >= secy->replay_window) |
735 | lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window; | |
c09440f7 SD |
736 | |
737 | /* Now perform replay protection check again | |
738 | * (see IEEE 802.1AE-2006 figure 10-5) | |
739 | */ | |
a21ecf0e EM |
740 | if (secy->replay_protect && pn < lowest_pn && |
741 | (!secy->xpn || pn_same_half(pn, lowest_pn))) { | |
c09440f7 SD |
742 | spin_unlock(&rx_sa->lock); |
743 | u64_stats_update_begin(&rxsc_stats->syncp); | |
744 | rxsc_stats->stats.InPktsLate++; | |
745 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 | 746 | secy->netdev->stats.rx_dropped++; |
c09440f7 SD |
747 | return false; |
748 | } | |
749 | ||
750 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { | |
91ec9bd5 | 751 | unsigned int msdu_len = macsec_msdu_len(skb); |
c09440f7 SD |
752 | u64_stats_update_begin(&rxsc_stats->syncp); |
753 | if (hdr->tci_an & MACSEC_TCI_E) | |
91ec9bd5 | 754 | rxsc_stats->stats.InOctetsDecrypted += msdu_len; |
c09440f7 | 755 | else |
91ec9bd5 | 756 | rxsc_stats->stats.InOctetsValidated += msdu_len; |
c09440f7 SD |
757 | u64_stats_update_end(&rxsc_stats->syncp); |
758 | } | |
759 | ||
760 | if (!macsec_skb_cb(skb)->valid) { | |
761 | spin_unlock(&rx_sa->lock); | |
762 | ||
763 | /* 10.6.5 */ | |
764 | if (hdr->tci_an & MACSEC_TCI_C || | |
765 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
766 | u64_stats_update_begin(&rxsc_stats->syncp); | |
767 | rxsc_stats->stats.InPktsNotValid++; | |
768 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 CY |
769 | this_cpu_inc(rx_sa->stats->InPktsNotValid); |
770 | secy->netdev->stats.rx_errors++; | |
c09440f7 SD |
771 | return false; |
772 | } | |
773 | ||
774 | u64_stats_update_begin(&rxsc_stats->syncp); | |
775 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { | |
776 | rxsc_stats->stats.InPktsInvalid++; | |
777 | this_cpu_inc(rx_sa->stats->InPktsInvalid); | |
778 | } else if (pn < lowest_pn) { | |
779 | rxsc_stats->stats.InPktsDelayed++; | |
780 | } else { | |
781 | rxsc_stats->stats.InPktsUnchecked++; | |
782 | } | |
783 | u64_stats_update_end(&rxsc_stats->syncp); | |
784 | } else { | |
785 | u64_stats_update_begin(&rxsc_stats->syncp); | |
786 | if (pn < lowest_pn) { | |
787 | rxsc_stats->stats.InPktsDelayed++; | |
788 | } else { | |
789 | rxsc_stats->stats.InPktsOK++; | |
790 | this_cpu_inc(rx_sa->stats->InPktsOK); | |
791 | } | |
792 | u64_stats_update_end(&rxsc_stats->syncp); | |
793 | ||
a21ecf0e EM |
794 | // Instead of "pn >=" - to support pn overflow in xpn |
795 | if (pn + 1 > rx_sa->next_pn_halves.lower) { | |
796 | rx_sa->next_pn_halves.lower = pn + 1; | |
797 | } else if (secy->xpn && | |
798 | !pn_same_half(pn, rx_sa->next_pn_halves.lower)) { | |
799 | rx_sa->next_pn_halves.upper++; | |
800 | rx_sa->next_pn_halves.lower = pn + 1; | |
801 | } | |
802 | ||
c09440f7 SD |
803 | spin_unlock(&rx_sa->lock); |
804 | } | |
805 | ||
806 | return true; | |
807 | } | |
808 | ||
809 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) | |
810 | { | |
811 | skb->pkt_type = PACKET_HOST; | |
812 | skb->protocol = eth_type_trans(skb, dev); | |
813 | ||
814 | skb_reset_network_header(skb); | |
815 | if (!skb_transport_header_was_set(skb)) | |
816 | skb_reset_transport_header(skb); | |
817 | skb_reset_mac_len(skb); | |
818 | } | |
819 | ||
820 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) | |
821 | { | |
7d8b16b9 | 822 | skb->ip_summed = CHECKSUM_NONE; |
c09440f7 SD |
823 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); |
824 | skb_pull(skb, hdr_len); | |
825 | pskb_trim_unique(skb, skb->len - icv_len); | |
826 | } | |
827 | ||
828 | static void count_rx(struct net_device *dev, int len) | |
829 | { | |
830 | struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats); | |
831 | ||
832 | u64_stats_update_begin(&stats->syncp); | |
9962acef ED |
833 | u64_stats_inc(&stats->rx_packets); |
834 | u64_stats_add(&stats->rx_bytes, len); | |
c09440f7 SD |
835 | u64_stats_update_end(&stats->syncp); |
836 | } | |
837 | ||
23b8b93b | 838 | static void macsec_decrypt_done(void *data, int err) |
c09440f7 | 839 | { |
23b8b93b | 840 | struct sk_buff *skb = data; |
c09440f7 SD |
841 | struct net_device *dev = skb->dev; |
842 | struct macsec_dev *macsec = macsec_priv(dev); | |
843 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
c78ebe1d | 844 | struct macsec_rx_sc *rx_sc = rx_sa->sc; |
863483c9 | 845 | int len; |
c09440f7 SD |
846 | u32 pn; |
847 | ||
848 | aead_request_free(macsec_skb_cb(skb)->req); | |
849 | ||
b3bdc3ac LR |
850 | if (!err) |
851 | macsec_skb_cb(skb)->valid = true; | |
852 | ||
c09440f7 SD |
853 | rcu_read_lock_bh(); |
854 | pn = ntohl(macsec_ethhdr(skb)->packet_number); | |
855 | if (!macsec_post_decrypt(skb, &macsec->secy, pn)) { | |
856 | rcu_read_unlock_bh(); | |
857 | kfree_skb(skb); | |
858 | goto out; | |
859 | } | |
860 | ||
861 | macsec_finalize_skb(skb, macsec->secy.icv_len, | |
862 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
91ec9bd5 | 863 | len = skb->len; |
c09440f7 SD |
864 | macsec_reset_skb(skb, macsec->secy.netdev); |
865 | ||
863483c9 | 866 | if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS) |
c09440f7 | 867 | count_rx(dev, len); |
c09440f7 SD |
868 | |
869 | rcu_read_unlock_bh(); | |
870 | ||
871 | out: | |
872 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 873 | macsec_rxsc_put(rx_sc); |
c09440f7 | 874 | dev_put(dev); |
c09440f7 SD |
875 | } |
876 | ||
877 | static struct sk_buff *macsec_decrypt(struct sk_buff *skb, | |
878 | struct net_device *dev, | |
879 | struct macsec_rx_sa *rx_sa, | |
880 | sci_t sci, | |
881 | struct macsec_secy *secy) | |
882 | { | |
883 | int ret; | |
5d9649b3 | 884 | struct scatterlist *sg; |
5294b830 | 885 | struct sk_buff *trailer; |
5d9649b3 | 886 | unsigned char *iv; |
c09440f7 SD |
887 | struct aead_request *req; |
888 | struct macsec_eth_header *hdr; | |
a21ecf0e | 889 | u32 hdr_pn; |
c09440f7 SD |
890 | u16 icv_len = secy->icv_len; |
891 | ||
892 | macsec_skb_cb(skb)->valid = false; | |
893 | skb = skb_share_check(skb, GFP_ATOMIC); | |
894 | if (!skb) | |
c3b7d0bd | 895 | return ERR_PTR(-ENOMEM); |
c09440f7 | 896 | |
5294b830 JD |
897 | ret = skb_cow_data(skb, 0, &trailer); |
898 | if (unlikely(ret < 0)) { | |
899 | kfree_skb(skb); | |
900 | return ERR_PTR(ret); | |
901 | } | |
902 | req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
903 | if (!req) { |
904 | kfree_skb(skb); | |
c3b7d0bd | 905 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
906 | } |
907 | ||
908 | hdr = (struct macsec_eth_header *)skb->data; | |
a21ecf0e EM |
909 | hdr_pn = ntohl(hdr->packet_number); |
910 | ||
911 | if (secy->xpn) { | |
912 | pn_t recovered_pn = rx_sa->next_pn_halves; | |
913 | ||
914 | recovered_pn.lower = hdr_pn; | |
915 | if (hdr_pn < rx_sa->next_pn_halves.lower && | |
916 | !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower)) | |
917 | recovered_pn.upper++; | |
918 | ||
919 | macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64, | |
920 | rx_sa->key.salt); | |
921 | } else { | |
922 | macsec_fill_iv(iv, sci, hdr_pn); | |
923 | } | |
c09440f7 | 924 | |
5294b830 | 925 | sg_init_table(sg, ret); |
cda7ea69 JD |
926 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
927 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 928 | aead_request_free(req); |
cda7ea69 JD |
929 | kfree_skb(skb); |
930 | return ERR_PTR(ret); | |
931 | } | |
c09440f7 SD |
932 | |
933 | if (hdr->tci_an & MACSEC_TCI_E) { | |
934 | /* confidentiality: ethernet + macsec header | |
935 | * authenticated, encrypted payload | |
936 | */ | |
937 | int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci); | |
938 | ||
939 | aead_request_set_crypt(req, sg, sg, len, iv); | |
940 | aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci)); | |
941 | skb = skb_unshare(skb, GFP_ATOMIC); | |
942 | if (!skb) { | |
943 | aead_request_free(req); | |
c3b7d0bd | 944 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
945 | } |
946 | } else { | |
947 | /* integrity only: all headers + data authenticated */ | |
948 | aead_request_set_crypt(req, sg, sg, icv_len, iv); | |
949 | aead_request_set_ad(req, skb->len - icv_len); | |
950 | } | |
951 | ||
952 | macsec_skb_cb(skb)->req = req; | |
c09440f7 SD |
953 | skb->dev = dev; |
954 | aead_request_set_callback(req, 0, macsec_decrypt_done, skb); | |
955 | ||
956 | dev_hold(dev); | |
957 | ret = crypto_aead_decrypt(req); | |
958 | if (ret == -EINPROGRESS) { | |
c3b7d0bd | 959 | return ERR_PTR(ret); |
c09440f7 SD |
960 | } else if (ret != 0) { |
961 | /* decryption/authentication failed | |
962 | * 10.6 if validateFrames is disabled, deliver anyway | |
963 | */ | |
964 | if (ret != -EBADMSG) { | |
965 | kfree_skb(skb); | |
c3b7d0bd | 966 | skb = ERR_PTR(ret); |
c09440f7 SD |
967 | } |
968 | } else { | |
969 | macsec_skb_cb(skb)->valid = true; | |
970 | } | |
971 | dev_put(dev); | |
972 | ||
973 | aead_request_free(req); | |
974 | ||
975 | return skb; | |
976 | } | |
977 | ||
978 | static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) | |
979 | { | |
980 | struct macsec_rx_sc *rx_sc; | |
981 | ||
982 | for_each_rxsc(secy, rx_sc) { | |
983 | if (rx_sc->sci == sci) | |
984 | return rx_sc; | |
985 | } | |
986 | ||
987 | return NULL; | |
988 | } | |
989 | ||
990 | static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) | |
991 | { | |
992 | struct macsec_rx_sc *rx_sc; | |
993 | ||
994 | for_each_rxsc_rtnl(secy, rx_sc) { | |
995 | if (rx_sc->sci == sci) | |
996 | return rx_sc; | |
997 | } | |
998 | ||
999 | return NULL; | |
1000 | } | |
1001 | ||
3cf3227a | 1002 | static enum rx_handler_result handle_not_macsec(struct sk_buff *skb) |
c09440f7 | 1003 | { |
3cf3227a AT |
1004 | /* Deliver to the uncontrolled port by default */ |
1005 | enum rx_handler_result ret = RX_HANDLER_PASS; | |
f428011b | 1006 | struct ethhdr *hdr = eth_hdr(skb); |
860ead89 | 1007 | struct metadata_dst *md_dst; |
c09440f7 SD |
1008 | struct macsec_rxh_data *rxd; |
1009 | struct macsec_dev *macsec; | |
1010 | ||
1011 | rcu_read_lock(); | |
1012 | rxd = macsec_data_rcu(skb->dev); | |
860ead89 | 1013 | md_dst = skb_metadata_dst(skb); |
c09440f7 | 1014 | |
c09440f7 SD |
1015 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
1016 | struct sk_buff *nskb; | |
c09440f7 | 1017 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
f428011b MS |
1018 | struct net_device *ndev = macsec->secy.netdev; |
1019 | ||
1020 | /* If h/w offloading is enabled, HW decodes frames and strips | |
1021 | * the SecTAG, so we have to deduce which port to deliver to. | |
1022 | */ | |
1023 | if (macsec_is_offloaded(macsec) && netif_running(ndev)) { | |
860ead89 LN |
1024 | if (md_dst && md_dst->type == METADATA_MACSEC && |
1025 | (!find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci))) | |
1026 | continue; | |
1027 | ||
f428011b MS |
1028 | if (ether_addr_equal_64bits(hdr->h_dest, |
1029 | ndev->dev_addr)) { | |
1030 | /* exact match, divert skb to this port */ | |
1031 | skb->dev = ndev; | |
1032 | skb->pkt_type = PACKET_HOST; | |
1033 | ret = RX_HANDLER_ANOTHER; | |
1034 | goto out; | |
1035 | } else if (is_multicast_ether_addr_64bits( | |
1036 | hdr->h_dest)) { | |
1037 | /* multicast frame, deliver on this port too */ | |
1038 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1039 | if (!nskb) | |
1040 | break; | |
1041 | ||
1042 | nskb->dev = ndev; | |
1043 | if (ether_addr_equal_64bits(hdr->h_dest, | |
1044 | ndev->broadcast)) | |
1045 | nskb->pkt_type = PACKET_BROADCAST; | |
1046 | else | |
1047 | nskb->pkt_type = PACKET_MULTICAST; | |
1048 | ||
baebdf48 | 1049 | __netif_rx(nskb); |
f428011b MS |
1050 | } |
1051 | continue; | |
1052 | } | |
c09440f7 | 1053 | |
f428011b MS |
1054 | /* 10.6 If the management control validateFrames is not |
1055 | * Strict, frames without a SecTAG are received, counted, and | |
1056 | * delivered to the Controlled Port | |
1057 | */ | |
1058 | if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
c09440f7 SD |
1059 | u64_stats_update_begin(&secy_stats->syncp); |
1060 | secy_stats->stats.InPktsNoTag++; | |
1061 | u64_stats_update_end(&secy_stats->syncp); | |
91ec9bd5 | 1062 | macsec->secy.netdev->stats.rx_dropped++; |
c09440f7 SD |
1063 | continue; |
1064 | } | |
1065 | ||
1066 | /* deliver on this port */ | |
1067 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1068 | if (!nskb) | |
1069 | break; | |
1070 | ||
f428011b | 1071 | nskb->dev = ndev; |
c09440f7 | 1072 | |
baebdf48 | 1073 | if (__netif_rx(nskb) == NET_RX_SUCCESS) { |
c09440f7 SD |
1074 | u64_stats_update_begin(&secy_stats->syncp); |
1075 | secy_stats->stats.InPktsUntagged++; | |
1076 | u64_stats_update_end(&secy_stats->syncp); | |
c09440f7 SD |
1077 | } |
1078 | } | |
1079 | ||
3cf3227a | 1080 | out: |
c09440f7 | 1081 | rcu_read_unlock(); |
3cf3227a | 1082 | return ret; |
c09440f7 SD |
1083 | } |
1084 | ||
1085 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) | |
1086 | { | |
1087 | struct sk_buff *skb = *pskb; | |
1088 | struct net_device *dev = skb->dev; | |
1089 | struct macsec_eth_header *hdr; | |
1090 | struct macsec_secy *secy = NULL; | |
1091 | struct macsec_rx_sc *rx_sc; | |
1092 | struct macsec_rx_sa *rx_sa; | |
1093 | struct macsec_rxh_data *rxd; | |
1094 | struct macsec_dev *macsec; | |
c7cc9200 | 1095 | unsigned int len; |
c09440f7 | 1096 | sci_t sci; |
a21ecf0e | 1097 | u32 hdr_pn; |
c09440f7 SD |
1098 | bool cbit; |
1099 | struct pcpu_rx_sc_stats *rxsc_stats; | |
1100 | struct pcpu_secy_stats *secy_stats; | |
1101 | bool pulled_sci; | |
5491e7c6 | 1102 | int ret; |
c09440f7 SD |
1103 | |
1104 | if (skb_headroom(skb) < ETH_HLEN) | |
1105 | goto drop_direct; | |
1106 | ||
1107 | hdr = macsec_ethhdr(skb); | |
3cf3227a AT |
1108 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) |
1109 | return handle_not_macsec(skb); | |
c09440f7 SD |
1110 | |
1111 | skb = skb_unshare(skb, GFP_ATOMIC); | |
095c02da AS |
1112 | *pskb = skb; |
1113 | if (!skb) | |
c09440f7 | 1114 | return RX_HANDLER_CONSUMED; |
c09440f7 SD |
1115 | |
1116 | pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); | |
1117 | if (!pulled_sci) { | |
1118 | if (!pskb_may_pull(skb, macsec_extra_len(false))) | |
1119 | goto drop_direct; | |
1120 | } | |
1121 | ||
1122 | hdr = macsec_ethhdr(skb); | |
1123 | ||
1124 | /* Frames with a SecTAG that has the TCI E bit set but the C | |
1125 | * bit clear are discarded, as this reserved encoding is used | |
1126 | * to identify frames with a SecTAG that are not to be | |
1127 | * delivered to the Controlled Port. | |
1128 | */ | |
1129 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) | |
1130 | return RX_HANDLER_PASS; | |
1131 | ||
1132 | /* now, pull the extra length */ | |
1133 | if (hdr->tci_an & MACSEC_TCI_SC) { | |
1134 | if (!pulled_sci) | |
1135 | goto drop_direct; | |
1136 | } | |
1137 | ||
1138 | /* ethernet header is part of crypto processing */ | |
1139 | skb_push(skb, ETH_HLEN); | |
1140 | ||
1141 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); | |
1142 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; | |
1143 | sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); | |
1144 | ||
1145 | rcu_read_lock(); | |
1146 | rxd = macsec_data_rcu(skb->dev); | |
1147 | ||
1148 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1149 | struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); | |
7979472b | 1150 | |
c78ebe1d | 1151 | sc = sc ? macsec_rxsc_get(sc) : NULL; |
c09440f7 SD |
1152 | |
1153 | if (sc) { | |
1154 | secy = &macsec->secy; | |
1155 | rx_sc = sc; | |
1156 | break; | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | if (!secy) | |
1161 | goto nosci; | |
1162 | ||
1163 | dev = secy->netdev; | |
1164 | macsec = macsec_priv(dev); | |
1165 | secy_stats = this_cpu_ptr(macsec->stats); | |
1166 | rxsc_stats = this_cpu_ptr(rx_sc->stats); | |
1167 | ||
a21ecf0e | 1168 | if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) { |
c09440f7 SD |
1169 | u64_stats_update_begin(&secy_stats->syncp); |
1170 | secy_stats->stats.InPktsBadTag++; | |
1171 | u64_stats_update_end(&secy_stats->syncp); | |
91ec9bd5 | 1172 | secy->netdev->stats.rx_errors++; |
c09440f7 SD |
1173 | goto drop_nosa; |
1174 | } | |
1175 | ||
1176 | rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); | |
1177 | if (!rx_sa) { | |
1178 | /* 10.6.1 if the SA is not in use */ | |
1179 | ||
1180 | /* If validateFrames is Strict or the C bit in the | |
1181 | * SecTAG is set, discard | |
1182 | */ | |
91ec9bd5 | 1183 | struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc); |
c09440f7 SD |
1184 | if (hdr->tci_an & MACSEC_TCI_C || |
1185 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
1186 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1187 | rxsc_stats->stats.InPktsNotUsingSA++; | |
1188 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 CY |
1189 | secy->netdev->stats.rx_errors++; |
1190 | if (active_rx_sa) | |
1191 | this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA); | |
c09440f7 SD |
1192 | goto drop_nosa; |
1193 | } | |
1194 | ||
1195 | /* not Strict, the frame (with the SecTAG and ICV | |
1196 | * removed) is delivered to the Controlled Port. | |
1197 | */ | |
1198 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1199 | rxsc_stats->stats.InPktsUnusedSA++; | |
1200 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 CY |
1201 | if (active_rx_sa) |
1202 | this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA); | |
c09440f7 SD |
1203 | goto deliver; |
1204 | } | |
1205 | ||
1206 | /* First, PN check to avoid decrypting obviously wrong packets */ | |
a21ecf0e | 1207 | hdr_pn = ntohl(hdr->packet_number); |
c09440f7 SD |
1208 | if (secy->replay_protect) { |
1209 | bool late; | |
1210 | ||
1211 | spin_lock(&rx_sa->lock); | |
a21ecf0e EM |
1212 | late = rx_sa->next_pn_halves.lower >= secy->replay_window && |
1213 | hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window); | |
1214 | ||
1215 | if (secy->xpn) | |
1216 | late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn); | |
c09440f7 SD |
1217 | spin_unlock(&rx_sa->lock); |
1218 | ||
1219 | if (late) { | |
1220 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1221 | rxsc_stats->stats.InPktsLate++; | |
1222 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 | 1223 | macsec->secy.netdev->stats.rx_dropped++; |
c09440f7 SD |
1224 | goto drop; |
1225 | } | |
1226 | } | |
1227 | ||
e3a3b626 BG |
1228 | macsec_skb_cb(skb)->rx_sa = rx_sa; |
1229 | ||
c09440f7 SD |
1230 | /* Disabled && !changed text => skip validation */ |
1231 | if (hdr->tci_an & MACSEC_TCI_C || | |
1232 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) | |
1233 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); | |
1234 | ||
c3b7d0bd SD |
1235 | if (IS_ERR(skb)) { |
1236 | /* the decrypt callback needs the reference */ | |
c78ebe1d | 1237 | if (PTR_ERR(skb) != -EINPROGRESS) { |
c3b7d0bd | 1238 | macsec_rxsa_put(rx_sa); |
c78ebe1d SD |
1239 | macsec_rxsc_put(rx_sc); |
1240 | } | |
c09440f7 SD |
1241 | rcu_read_unlock(); |
1242 | *pskb = NULL; | |
1243 | return RX_HANDLER_CONSUMED; | |
1244 | } | |
1245 | ||
a21ecf0e | 1246 | if (!macsec_post_decrypt(skb, secy, hdr_pn)) |
c09440f7 SD |
1247 | goto drop; |
1248 | ||
1249 | deliver: | |
1250 | macsec_finalize_skb(skb, secy->icv_len, | |
1251 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
91ec9bd5 | 1252 | len = skb->len; |
c09440f7 SD |
1253 | macsec_reset_skb(skb, secy->netdev); |
1254 | ||
497f358a SD |
1255 | if (rx_sa) |
1256 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 1257 | macsec_rxsc_put(rx_sc); |
5491e7c6 | 1258 | |
ba56d8ce | 1259 | skb_orphan(skb); |
5491e7c6 PA |
1260 | ret = gro_cells_receive(&macsec->gro_cells, skb); |
1261 | if (ret == NET_RX_SUCCESS) | |
c7cc9200 | 1262 | count_rx(dev, len); |
5491e7c6 PA |
1263 | else |
1264 | macsec->secy.netdev->stats.rx_dropped++; | |
c09440f7 SD |
1265 | |
1266 | rcu_read_unlock(); | |
1267 | ||
5491e7c6 PA |
1268 | *pskb = NULL; |
1269 | return RX_HANDLER_CONSUMED; | |
c09440f7 SD |
1270 | |
1271 | drop: | |
1272 | macsec_rxsa_put(rx_sa); | |
1273 | drop_nosa: | |
c78ebe1d | 1274 | macsec_rxsc_put(rx_sc); |
c09440f7 SD |
1275 | rcu_read_unlock(); |
1276 | drop_direct: | |
1277 | kfree_skb(skb); | |
1278 | *pskb = NULL; | |
1279 | return RX_HANDLER_CONSUMED; | |
1280 | ||
1281 | nosci: | |
1282 | /* 10.6.1 if the SC is not found */ | |
1283 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); | |
1284 | if (!cbit) | |
b1671253 | 1285 | macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN, |
c09440f7 SD |
1286 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); |
1287 | ||
1288 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1289 | struct sk_buff *nskb; | |
c09440f7 SD |
1290 | |
1291 | secy_stats = this_cpu_ptr(macsec->stats); | |
1292 | ||
1293 | /* If validateFrames is Strict or the C bit in the | |
1294 | * SecTAG is set, discard | |
1295 | */ | |
1296 | if (cbit || | |
1297 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1298 | u64_stats_update_begin(&secy_stats->syncp); | |
1299 | secy_stats->stats.InPktsNoSCI++; | |
1300 | u64_stats_update_end(&secy_stats->syncp); | |
91ec9bd5 | 1301 | macsec->secy.netdev->stats.rx_errors++; |
c09440f7 SD |
1302 | continue; |
1303 | } | |
1304 | ||
1305 | /* not strict, the frame (with the SecTAG and ICV | |
1306 | * removed) is delivered to the Controlled Port. | |
1307 | */ | |
1308 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1309 | if (!nskb) | |
1310 | break; | |
1311 | ||
1312 | macsec_reset_skb(nskb, macsec->secy.netdev); | |
1313 | ||
baebdf48 | 1314 | ret = __netif_rx(nskb); |
c09440f7 SD |
1315 | if (ret == NET_RX_SUCCESS) { |
1316 | u64_stats_update_begin(&secy_stats->syncp); | |
1317 | secy_stats->stats.InPktsUnknownSCI++; | |
1318 | u64_stats_update_end(&secy_stats->syncp); | |
1319 | } else { | |
1320 | macsec->secy.netdev->stats.rx_dropped++; | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | rcu_read_unlock(); | |
1325 | *pskb = skb; | |
1326 | return RX_HANDLER_PASS; | |
1327 | } | |
1328 | ||
1329 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) | |
1330 | { | |
1331 | struct crypto_aead *tfm; | |
1332 | int ret; | |
1333 | ||
ab046a5d SD |
1334 | /* Pick a sync gcm(aes) cipher to ensure order is preserved. */ |
1335 | tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC); | |
34aedfee DC |
1336 | |
1337 | if (IS_ERR(tfm)) | |
1338 | return tfm; | |
c09440f7 SD |
1339 | |
1340 | ret = crypto_aead_setkey(tfm, key, key_len); | |
34aedfee DC |
1341 | if (ret < 0) |
1342 | goto fail; | |
c09440f7 SD |
1343 | |
1344 | ret = crypto_aead_setauthsize(tfm, icv_len); | |
34aedfee DC |
1345 | if (ret < 0) |
1346 | goto fail; | |
c09440f7 SD |
1347 | |
1348 | return tfm; | |
34aedfee DC |
1349 | fail: |
1350 | crypto_free_aead(tfm); | |
1351 | return ERR_PTR(ret); | |
c09440f7 SD |
1352 | } |
1353 | ||
1354 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, | |
1355 | int icv_len) | |
1356 | { | |
1357 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); | |
1358 | if (!rx_sa->stats) | |
34aedfee | 1359 | return -ENOMEM; |
c09440f7 SD |
1360 | |
1361 | rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1362 | if (IS_ERR(rx_sa->key.tfm)) { |
c09440f7 | 1363 | free_percpu(rx_sa->stats); |
34aedfee | 1364 | return PTR_ERR(rx_sa->key.tfm); |
c09440f7 SD |
1365 | } |
1366 | ||
48ef50fa | 1367 | rx_sa->ssci = MACSEC_UNDEF_SSCI; |
c09440f7 SD |
1368 | rx_sa->active = false; |
1369 | rx_sa->next_pn = 1; | |
e187246f | 1370 | refcount_set(&rx_sa->refcnt, 1); |
c09440f7 SD |
1371 | spin_lock_init(&rx_sa->lock); |
1372 | ||
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) | |
1377 | { | |
1378 | rx_sa->active = false; | |
1379 | ||
1380 | macsec_rxsa_put(rx_sa); | |
1381 | } | |
1382 | ||
1383 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) | |
1384 | { | |
1385 | int i; | |
1386 | ||
1387 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
1388 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); | |
1389 | ||
1390 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); | |
1391 | if (sa) | |
1392 | clear_rx_sa(sa); | |
1393 | } | |
1394 | ||
1395 | macsec_rxsc_put(rx_sc); | |
1396 | } | |
1397 | ||
1398 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1399 | { | |
1400 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; | |
1401 | ||
1402 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); | |
1403 | rx_sc; | |
1404 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { | |
1405 | if (rx_sc->sci == sci) { | |
1406 | if (rx_sc->active) | |
1407 | secy->n_rx_sc--; | |
1408 | rcu_assign_pointer(*rx_scp, rx_sc->next); | |
1409 | return rx_sc; | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | return NULL; | |
1414 | } | |
1415 | ||
73a4b31c SD |
1416 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci, |
1417 | bool active) | |
c09440f7 SD |
1418 | { |
1419 | struct macsec_rx_sc *rx_sc; | |
1420 | struct macsec_dev *macsec; | |
1421 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
1422 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
1423 | struct macsec_secy *secy; | |
1424 | ||
1425 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
1426 | if (find_rx_sc_rtnl(&macsec->secy, sci)) | |
1427 | return ERR_PTR(-EEXIST); | |
1428 | } | |
1429 | ||
1430 | rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); | |
1431 | if (!rx_sc) | |
1432 | return ERR_PTR(-ENOMEM); | |
1433 | ||
1434 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); | |
1435 | if (!rx_sc->stats) { | |
1436 | kfree(rx_sc); | |
1437 | return ERR_PTR(-ENOMEM); | |
1438 | } | |
1439 | ||
1440 | rx_sc->sci = sci; | |
73a4b31c | 1441 | rx_sc->active = active; |
8676d76f | 1442 | refcount_set(&rx_sc->refcnt, 1); |
c09440f7 SD |
1443 | |
1444 | secy = &macsec_priv(dev)->secy; | |
1445 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); | |
1446 | rcu_assign_pointer(secy->rx_sc, rx_sc); | |
1447 | ||
1448 | if (rx_sc->active) | |
1449 | secy->n_rx_sc++; | |
1450 | ||
1451 | return rx_sc; | |
1452 | } | |
1453 | ||
1454 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, | |
1455 | int icv_len) | |
1456 | { | |
1457 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); | |
1458 | if (!tx_sa->stats) | |
34aedfee | 1459 | return -ENOMEM; |
c09440f7 SD |
1460 | |
1461 | tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1462 | if (IS_ERR(tx_sa->key.tfm)) { |
c09440f7 | 1463 | free_percpu(tx_sa->stats); |
34aedfee | 1464 | return PTR_ERR(tx_sa->key.tfm); |
c09440f7 SD |
1465 | } |
1466 | ||
48ef50fa | 1467 | tx_sa->ssci = MACSEC_UNDEF_SSCI; |
c09440f7 | 1468 | tx_sa->active = false; |
28206cdb | 1469 | refcount_set(&tx_sa->refcnt, 1); |
c09440f7 SD |
1470 | spin_lock_init(&tx_sa->lock); |
1471 | ||
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) | |
1476 | { | |
1477 | tx_sa->active = false; | |
1478 | ||
1479 | macsec_txsa_put(tx_sa); | |
1480 | } | |
1481 | ||
489111e5 | 1482 | static struct genl_family macsec_fam; |
c09440f7 SD |
1483 | |
1484 | static struct net_device *get_dev_from_nl(struct net *net, | |
1485 | struct nlattr **attrs) | |
1486 | { | |
1487 | int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); | |
1488 | struct net_device *dev; | |
1489 | ||
1490 | dev = __dev_get_by_index(net, ifindex); | |
1491 | if (!dev) | |
1492 | return ERR_PTR(-ENODEV); | |
1493 | ||
1494 | if (!netif_is_macsec(dev)) | |
1495 | return ERR_PTR(-ENODEV); | |
1496 | ||
1497 | return dev; | |
1498 | } | |
1499 | ||
791bb3fc MS |
1500 | static enum macsec_offload nla_get_offload(const struct nlattr *nla) |
1501 | { | |
1502 | return (__force enum macsec_offload)nla_get_u8(nla); | |
1503 | } | |
1504 | ||
c09440f7 SD |
1505 | static sci_t nla_get_sci(const struct nlattr *nla) |
1506 | { | |
1507 | return (__force sci_t)nla_get_u64(nla); | |
1508 | } | |
1509 | ||
f60d94c0 ND |
1510 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1511 | int padattr) | |
c09440f7 | 1512 | { |
f60d94c0 | 1513 | return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
c09440f7 SD |
1514 | } |
1515 | ||
48ef50fa EM |
1516 | static ssci_t nla_get_ssci(const struct nlattr *nla) |
1517 | { | |
1518 | return (__force ssci_t)nla_get_u32(nla); | |
1519 | } | |
1520 | ||
1521 | static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value) | |
1522 | { | |
1523 | return nla_put_u32(skb, attrtype, (__force u64)value); | |
1524 | } | |
1525 | ||
c09440f7 SD |
1526 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, |
1527 | struct nlattr **attrs, | |
1528 | struct nlattr **tb_sa, | |
1529 | struct net_device **devp, | |
1530 | struct macsec_secy **secyp, | |
1531 | struct macsec_tx_sc **scp, | |
1532 | u8 *assoc_num) | |
1533 | { | |
1534 | struct net_device *dev; | |
1535 | struct macsec_secy *secy; | |
1536 | struct macsec_tx_sc *tx_sc; | |
1537 | struct macsec_tx_sa *tx_sa; | |
1538 | ||
1539 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1540 | return ERR_PTR(-EINVAL); | |
1541 | ||
1542 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1543 | ||
1544 | dev = get_dev_from_nl(net, attrs); | |
1545 | if (IS_ERR(dev)) | |
1546 | return ERR_CAST(dev); | |
1547 | ||
1548 | if (*assoc_num >= MACSEC_NUM_AN) | |
1549 | return ERR_PTR(-EINVAL); | |
1550 | ||
1551 | secy = &macsec_priv(dev)->secy; | |
1552 | tx_sc = &secy->tx_sc; | |
1553 | ||
1554 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); | |
1555 | if (!tx_sa) | |
1556 | return ERR_PTR(-ENODEV); | |
1557 | ||
1558 | *devp = dev; | |
1559 | *scp = tx_sc; | |
1560 | *secyp = secy; | |
1561 | return tx_sa; | |
1562 | } | |
1563 | ||
1564 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, | |
1565 | struct nlattr **attrs, | |
1566 | struct nlattr **tb_rxsc, | |
1567 | struct net_device **devp, | |
1568 | struct macsec_secy **secyp) | |
1569 | { | |
1570 | struct net_device *dev; | |
1571 | struct macsec_secy *secy; | |
1572 | struct macsec_rx_sc *rx_sc; | |
1573 | sci_t sci; | |
1574 | ||
1575 | dev = get_dev_from_nl(net, attrs); | |
1576 | if (IS_ERR(dev)) | |
1577 | return ERR_CAST(dev); | |
1578 | ||
1579 | secy = &macsec_priv(dev)->secy; | |
1580 | ||
1581 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1582 | return ERR_PTR(-EINVAL); | |
1583 | ||
1584 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1585 | rx_sc = find_rx_sc_rtnl(secy, sci); | |
1586 | if (!rx_sc) | |
1587 | return ERR_PTR(-ENODEV); | |
1588 | ||
1589 | *secyp = secy; | |
1590 | *devp = dev; | |
1591 | ||
1592 | return rx_sc; | |
1593 | } | |
1594 | ||
1595 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, | |
1596 | struct nlattr **attrs, | |
1597 | struct nlattr **tb_rxsc, | |
1598 | struct nlattr **tb_sa, | |
1599 | struct net_device **devp, | |
1600 | struct macsec_secy **secyp, | |
1601 | struct macsec_rx_sc **scp, | |
1602 | u8 *assoc_num) | |
1603 | { | |
1604 | struct macsec_rx_sc *rx_sc; | |
1605 | struct macsec_rx_sa *rx_sa; | |
1606 | ||
1607 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1608 | return ERR_PTR(-EINVAL); | |
1609 | ||
1610 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1611 | if (*assoc_num >= MACSEC_NUM_AN) | |
1612 | return ERR_PTR(-EINVAL); | |
1613 | ||
1614 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); | |
1615 | if (IS_ERR(rx_sc)) | |
1616 | return ERR_CAST(rx_sc); | |
1617 | ||
1618 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); | |
1619 | if (!rx_sa) | |
1620 | return ERR_PTR(-ENODEV); | |
1621 | ||
1622 | *scp = rx_sc; | |
1623 | return rx_sa; | |
1624 | } | |
1625 | ||
c09440f7 SD |
1626 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { |
1627 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
1628 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, | |
1629 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, | |
dcb780fb | 1630 | [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED }, |
c09440f7 SD |
1631 | }; |
1632 | ||
1633 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { | |
1634 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, | |
1635 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1636 | }; | |
1637 | ||
1638 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { | |
1639 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, | |
1640 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
bc043585 | 1641 | [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4), |
8acca6ac SD |
1642 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1643 | .len = MACSEC_KEYID_LEN, }, | |
c09440f7 | 1644 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
e8660ded | 1645 | .len = MACSEC_MAX_KEY_LEN, }, |
48ef50fa EM |
1646 | [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 }, |
1647 | [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY, | |
1648 | .len = MACSEC_SALT_LEN, }, | |
c09440f7 SD |
1649 | }; |
1650 | ||
dcb780fb AT |
1651 | static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = { |
1652 | [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 }, | |
1653 | }; | |
1654 | ||
3cf3227a AT |
1655 | /* Offloads an operation to a device driver */ |
1656 | static int macsec_offload(int (* const func)(struct macsec_context *), | |
1657 | struct macsec_context *ctx) | |
1658 | { | |
1659 | int ret; | |
1660 | ||
1661 | if (unlikely(!func)) | |
1662 | return 0; | |
1663 | ||
1664 | if (ctx->offload == MACSEC_OFFLOAD_PHY) | |
1665 | mutex_lock(&ctx->phydev->lock); | |
1666 | ||
3cf3227a | 1667 | ret = (*func)(ctx); |
3cf3227a | 1668 | |
3cf3227a AT |
1669 | if (ctx->offload == MACSEC_OFFLOAD_PHY) |
1670 | mutex_unlock(&ctx->phydev->lock); | |
1671 | ||
1672 | return ret; | |
1673 | } | |
1674 | ||
c09440f7 SD |
1675 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) |
1676 | { | |
1677 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) | |
1678 | return -EINVAL; | |
1679 | ||
8cb08174 | 1680 | if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL)) |
c09440f7 SD |
1681 | return -EINVAL; |
1682 | ||
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) | |
1687 | { | |
1688 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) | |
1689 | return -EINVAL; | |
1690 | ||
8cb08174 | 1691 | if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL)) |
c09440f7 SD |
1692 | return -EINVAL; |
1693 | ||
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | static bool validate_add_rxsa(struct nlattr **attrs) | |
1698 | { | |
1699 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1700 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1701 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1702 | return false; | |
1703 | ||
1704 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1705 | return false; | |
1706 | ||
48ef50fa | 1707 | if (attrs[MACSEC_SA_ATTR_PN] && |
c630d1fe | 1708 | nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
1709 | return false; |
1710 | ||
1711 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1712 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1713 | return false; | |
1714 | } | |
1715 | ||
8acca6ac SD |
1716 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1717 | return false; | |
1718 | ||
c09440f7 SD |
1719 | return true; |
1720 | } | |
1721 | ||
1722 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1723 | { | |
1724 | struct net_device *dev; | |
1725 | struct nlattr **attrs = info->attrs; | |
1726 | struct macsec_secy *secy; | |
1727 | struct macsec_rx_sc *rx_sc; | |
1728 | struct macsec_rx_sa *rx_sa; | |
1729 | unsigned char assoc_num; | |
48ef50fa | 1730 | int pn_len; |
c09440f7 SD |
1731 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
1732 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1733 | int err; |
c09440f7 SD |
1734 | |
1735 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1736 | return -EINVAL; | |
1737 | ||
1738 | if (parse_sa_config(attrs, tb_sa)) | |
1739 | return -EINVAL; | |
1740 | ||
1741 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1742 | return -EINVAL; | |
1743 | ||
1744 | if (!validate_add_rxsa(tb_sa)) | |
1745 | return -EINVAL; | |
1746 | ||
1747 | rtnl_lock(); | |
1748 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
36b232c8 | 1749 | if (IS_ERR(rx_sc)) { |
c09440f7 SD |
1750 | rtnl_unlock(); |
1751 | return PTR_ERR(rx_sc); | |
1752 | } | |
1753 | ||
1754 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1755 | ||
1756 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1757 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", | |
1758 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1759 | rtnl_unlock(); | |
1760 | return -EINVAL; | |
1761 | } | |
1762 | ||
48ef50fa | 1763 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
f46040ee SD |
1764 | if (tb_sa[MACSEC_SA_ATTR_PN] && |
1765 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
48ef50fa EM |
1766 | pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n", |
1767 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
1768 | rtnl_unlock(); | |
1769 | return -EINVAL; | |
1770 | } | |
1771 | ||
1772 | if (secy->xpn) { | |
1773 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { | |
1774 | rtnl_unlock(); | |
1775 | return -EINVAL; | |
1776 | } | |
1777 | ||
1778 | if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { | |
1779 | pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n", | |
1780 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), | |
3240eac4 | 1781 | MACSEC_SALT_LEN); |
48ef50fa EM |
1782 | rtnl_unlock(); |
1783 | return -EINVAL; | |
1784 | } | |
1785 | } | |
1786 | ||
c09440f7 SD |
1787 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); |
1788 | if (rx_sa) { | |
1789 | rtnl_unlock(); | |
1790 | return -EBUSY; | |
1791 | } | |
1792 | ||
1793 | rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); | |
34aedfee | 1794 | if (!rx_sa) { |
c09440f7 SD |
1795 | rtnl_unlock(); |
1796 | return -ENOMEM; | |
1797 | } | |
1798 | ||
34aedfee DC |
1799 | err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1800 | secy->key_len, secy->icv_len); | |
1801 | if (err < 0) { | |
1802 | kfree(rx_sa); | |
1803 | rtnl_unlock(); | |
1804 | return err; | |
1805 | } | |
1806 | ||
c09440f7 SD |
1807 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
1808 | spin_lock_bh(&rx_sa->lock); | |
48ef50fa | 1809 | rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
1810 | spin_unlock_bh(&rx_sa->lock); |
1811 | } | |
1812 | ||
1813 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1814 | rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1815 | ||
c09440f7 | 1816 | rx_sa->sc = rx_sc; |
3cf3227a | 1817 | |
0a6e9b71 EH |
1818 | if (secy->xpn) { |
1819 | rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); | |
1820 | nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], | |
1821 | MACSEC_SALT_LEN); | |
1822 | } | |
1823 | ||
3cf3227a AT |
1824 | /* If h/w offloading is available, propagate to the device */ |
1825 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
1826 | const struct macsec_ops *ops; | |
1827 | struct macsec_context ctx; | |
1828 | ||
1829 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1830 | if (!ops) { | |
1831 | err = -EOPNOTSUPP; | |
1832 | goto cleanup; | |
1833 | } | |
1834 | ||
1835 | ctx.sa.assoc_num = assoc_num; | |
1836 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 1837 | ctx.secy = secy; |
3cf3227a | 1838 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1f7fe512 | 1839 | secy->key_len); |
3cf3227a AT |
1840 | |
1841 | err = macsec_offload(ops->mdo_add_rxsa, &ctx); | |
aaab73f8 | 1842 | memzero_explicit(ctx.sa.key, secy->key_len); |
3cf3227a AT |
1843 | if (err) |
1844 | goto cleanup; | |
1845 | } | |
1846 | ||
1847 | nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); | |
c09440f7 SD |
1848 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); |
1849 | ||
1850 | rtnl_unlock(); | |
1851 | ||
1852 | return 0; | |
3cf3227a AT |
1853 | |
1854 | cleanup: | |
c7b205fb | 1855 | macsec_rxsa_put(rx_sa); |
3cf3227a AT |
1856 | rtnl_unlock(); |
1857 | return err; | |
c09440f7 SD |
1858 | } |
1859 | ||
1860 | static bool validate_add_rxsc(struct nlattr **attrs) | |
1861 | { | |
1862 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) | |
1863 | return false; | |
1864 | ||
1865 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { | |
1866 | if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) | |
1867 | return false; | |
1868 | } | |
1869 | ||
1870 | return true; | |
1871 | } | |
1872 | ||
1873 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1874 | { | |
1875 | struct net_device *dev; | |
1876 | sci_t sci = MACSEC_UNDEF_SCI; | |
1877 | struct nlattr **attrs = info->attrs; | |
1878 | struct macsec_rx_sc *rx_sc; | |
1879 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
182879f8 | 1880 | struct macsec_secy *secy; |
73a4b31c | 1881 | bool active = true; |
3cf3227a | 1882 | int ret; |
c09440f7 SD |
1883 | |
1884 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1885 | return -EINVAL; | |
1886 | ||
1887 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1888 | return -EINVAL; | |
1889 | ||
1890 | if (!validate_add_rxsc(tb_rxsc)) | |
1891 | return -EINVAL; | |
1892 | ||
1893 | rtnl_lock(); | |
1894 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1895 | if (IS_ERR(dev)) { | |
1896 | rtnl_unlock(); | |
1897 | return PTR_ERR(dev); | |
1898 | } | |
1899 | ||
182879f8 | 1900 | secy = &macsec_priv(dev)->secy; |
c09440f7 SD |
1901 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
1902 | ||
73a4b31c SD |
1903 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) |
1904 | active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
1905 | ||
1906 | rx_sc = create_rx_sc(dev, sci, active); | |
c09440f7 SD |
1907 | if (IS_ERR(rx_sc)) { |
1908 | rtnl_unlock(); | |
1909 | return PTR_ERR(rx_sc); | |
1910 | } | |
1911 | ||
3cf3227a AT |
1912 | if (macsec_is_offloaded(netdev_priv(dev))) { |
1913 | const struct macsec_ops *ops; | |
1914 | struct macsec_context ctx; | |
1915 | ||
1916 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1917 | if (!ops) { | |
1918 | ret = -EOPNOTSUPP; | |
1919 | goto cleanup; | |
1920 | } | |
1921 | ||
1922 | ctx.rx_sc = rx_sc; | |
182879f8 | 1923 | ctx.secy = secy; |
3cf3227a AT |
1924 | |
1925 | ret = macsec_offload(ops->mdo_add_rxsc, &ctx); | |
1926 | if (ret) | |
1927 | goto cleanup; | |
1928 | } | |
1929 | ||
c09440f7 SD |
1930 | rtnl_unlock(); |
1931 | ||
1932 | return 0; | |
3cf3227a AT |
1933 | |
1934 | cleanup: | |
93a30947 SD |
1935 | del_rx_sc(secy, sci); |
1936 | free_rx_sc(rx_sc); | |
3cf3227a AT |
1937 | rtnl_unlock(); |
1938 | return ret; | |
c09440f7 SD |
1939 | } |
1940 | ||
1941 | static bool validate_add_txsa(struct nlattr **attrs) | |
1942 | { | |
1943 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1944 | !attrs[MACSEC_SA_ATTR_PN] || | |
1945 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1946 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1947 | return false; | |
1948 | ||
1949 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1950 | return false; | |
1951 | ||
c630d1fe | 1952 | if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
1953 | return false; |
1954 | ||
1955 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1956 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1957 | return false; | |
1958 | } | |
1959 | ||
8acca6ac SD |
1960 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1961 | return false; | |
1962 | ||
c09440f7 SD |
1963 | return true; |
1964 | } | |
1965 | ||
1966 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) | |
1967 | { | |
1968 | struct net_device *dev; | |
1969 | struct nlattr **attrs = info->attrs; | |
1970 | struct macsec_secy *secy; | |
1971 | struct macsec_tx_sc *tx_sc; | |
1972 | struct macsec_tx_sa *tx_sa; | |
1973 | unsigned char assoc_num; | |
48ef50fa | 1974 | int pn_len; |
c09440f7 | 1975 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
3cf3227a | 1976 | bool was_operational; |
34aedfee | 1977 | int err; |
c09440f7 SD |
1978 | |
1979 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1980 | return -EINVAL; | |
1981 | ||
1982 | if (parse_sa_config(attrs, tb_sa)) | |
1983 | return -EINVAL; | |
1984 | ||
1985 | if (!validate_add_txsa(tb_sa)) | |
1986 | return -EINVAL; | |
1987 | ||
1988 | rtnl_lock(); | |
1989 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1990 | if (IS_ERR(dev)) { | |
1991 | rtnl_unlock(); | |
1992 | return PTR_ERR(dev); | |
1993 | } | |
1994 | ||
1995 | secy = &macsec_priv(dev)->secy; | |
1996 | tx_sc = &secy->tx_sc; | |
1997 | ||
1998 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1999 | ||
2000 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
2001 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", | |
2002 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
2003 | rtnl_unlock(); | |
2004 | return -EINVAL; | |
2005 | } | |
2006 | ||
48ef50fa EM |
2007 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
2008 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2009 | pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n", | |
2010 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2011 | rtnl_unlock(); | |
2012 | return -EINVAL; | |
2013 | } | |
2014 | ||
2015 | if (secy->xpn) { | |
2016 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { | |
2017 | rtnl_unlock(); | |
2018 | return -EINVAL; | |
2019 | } | |
2020 | ||
2021 | if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { | |
2022 | pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n", | |
2023 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), | |
3240eac4 | 2024 | MACSEC_SALT_LEN); |
48ef50fa EM |
2025 | rtnl_unlock(); |
2026 | return -EINVAL; | |
2027 | } | |
2028 | } | |
2029 | ||
c09440f7 SD |
2030 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); |
2031 | if (tx_sa) { | |
2032 | rtnl_unlock(); | |
2033 | return -EBUSY; | |
2034 | } | |
2035 | ||
2036 | tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); | |
34aedfee | 2037 | if (!tx_sa) { |
c09440f7 SD |
2038 | rtnl_unlock(); |
2039 | return -ENOMEM; | |
2040 | } | |
2041 | ||
34aedfee DC |
2042 | err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
2043 | secy->key_len, secy->icv_len); | |
2044 | if (err < 0) { | |
2045 | kfree(tx_sa); | |
2046 | rtnl_unlock(); | |
2047 | return err; | |
2048 | } | |
2049 | ||
c09440f7 | 2050 | spin_lock_bh(&tx_sa->lock); |
48ef50fa | 2051 | tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2052 | spin_unlock_bh(&tx_sa->lock); |
2053 | ||
2054 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2055 | tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2056 | ||
3cf3227a | 2057 | was_operational = secy->operational; |
c09440f7 SD |
2058 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) |
2059 | secy->operational = true; | |
2060 | ||
0a6e9b71 EH |
2061 | if (secy->xpn) { |
2062 | tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); | |
2063 | nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], | |
2064 | MACSEC_SALT_LEN); | |
2065 | } | |
2066 | ||
3cf3227a AT |
2067 | /* If h/w offloading is available, propagate to the device */ |
2068 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2069 | const struct macsec_ops *ops; | |
2070 | struct macsec_context ctx; | |
2071 | ||
2072 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2073 | if (!ops) { | |
2074 | err = -EOPNOTSUPP; | |
2075 | goto cleanup; | |
2076 | } | |
2077 | ||
2078 | ctx.sa.assoc_num = assoc_num; | |
2079 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2080 | ctx.secy = secy; |
3cf3227a | 2081 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1f7fe512 | 2082 | secy->key_len); |
3cf3227a AT |
2083 | |
2084 | err = macsec_offload(ops->mdo_add_txsa, &ctx); | |
aaab73f8 | 2085 | memzero_explicit(ctx.sa.key, secy->key_len); |
3cf3227a AT |
2086 | if (err) |
2087 | goto cleanup; | |
2088 | } | |
2089 | ||
2090 | nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); | |
c09440f7 SD |
2091 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); |
2092 | ||
2093 | rtnl_unlock(); | |
2094 | ||
2095 | return 0; | |
3cf3227a AT |
2096 | |
2097 | cleanup: | |
2098 | secy->operational = was_operational; | |
c7b205fb | 2099 | macsec_txsa_put(tx_sa); |
3cf3227a AT |
2100 | rtnl_unlock(); |
2101 | return err; | |
c09440f7 SD |
2102 | } |
2103 | ||
2104 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2105 | { | |
2106 | struct nlattr **attrs = info->attrs; | |
2107 | struct net_device *dev; | |
2108 | struct macsec_secy *secy; | |
2109 | struct macsec_rx_sc *rx_sc; | |
2110 | struct macsec_rx_sa *rx_sa; | |
2111 | u8 assoc_num; | |
2112 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2113 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2114 | int ret; |
c09440f7 SD |
2115 | |
2116 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2117 | return -EINVAL; | |
2118 | ||
2119 | if (parse_sa_config(attrs, tb_sa)) | |
2120 | return -EINVAL; | |
2121 | ||
2122 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2123 | return -EINVAL; | |
2124 | ||
2125 | rtnl_lock(); | |
2126 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2127 | &dev, &secy, &rx_sc, &assoc_num); | |
2128 | if (IS_ERR(rx_sa)) { | |
2129 | rtnl_unlock(); | |
2130 | return PTR_ERR(rx_sa); | |
2131 | } | |
2132 | ||
2133 | if (rx_sa->active) { | |
2134 | rtnl_unlock(); | |
2135 | return -EBUSY; | |
2136 | } | |
2137 | ||
3cf3227a AT |
2138 | /* If h/w offloading is available, propagate to the device */ |
2139 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2140 | const struct macsec_ops *ops; | |
2141 | struct macsec_context ctx; | |
2142 | ||
2143 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2144 | if (!ops) { | |
2145 | ret = -EOPNOTSUPP; | |
2146 | goto cleanup; | |
2147 | } | |
2148 | ||
2149 | ctx.sa.assoc_num = assoc_num; | |
2150 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 2151 | ctx.secy = secy; |
3cf3227a AT |
2152 | |
2153 | ret = macsec_offload(ops->mdo_del_rxsa, &ctx); | |
2154 | if (ret) | |
2155 | goto cleanup; | |
2156 | } | |
2157 | ||
c09440f7 SD |
2158 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); |
2159 | clear_rx_sa(rx_sa); | |
2160 | ||
2161 | rtnl_unlock(); | |
2162 | ||
2163 | return 0; | |
3cf3227a AT |
2164 | |
2165 | cleanup: | |
2166 | rtnl_unlock(); | |
2167 | return ret; | |
c09440f7 SD |
2168 | } |
2169 | ||
2170 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2171 | { | |
2172 | struct nlattr **attrs = info->attrs; | |
2173 | struct net_device *dev; | |
2174 | struct macsec_secy *secy; | |
2175 | struct macsec_rx_sc *rx_sc; | |
2176 | sci_t sci; | |
2177 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a | 2178 | int ret; |
c09440f7 SD |
2179 | |
2180 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2181 | return -EINVAL; | |
2182 | ||
2183 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2184 | return -EINVAL; | |
2185 | ||
2186 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
2187 | return -EINVAL; | |
2188 | ||
2189 | rtnl_lock(); | |
2190 | dev = get_dev_from_nl(genl_info_net(info), info->attrs); | |
2191 | if (IS_ERR(dev)) { | |
2192 | rtnl_unlock(); | |
2193 | return PTR_ERR(dev); | |
2194 | } | |
2195 | ||
2196 | secy = &macsec_priv(dev)->secy; | |
2197 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
2198 | ||
2199 | rx_sc = del_rx_sc(secy, sci); | |
2200 | if (!rx_sc) { | |
2201 | rtnl_unlock(); | |
2202 | return -ENODEV; | |
2203 | } | |
2204 | ||
3cf3227a AT |
2205 | /* If h/w offloading is available, propagate to the device */ |
2206 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2207 | const struct macsec_ops *ops; | |
2208 | struct macsec_context ctx; | |
2209 | ||
2210 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2211 | if (!ops) { | |
2212 | ret = -EOPNOTSUPP; | |
2213 | goto cleanup; | |
2214 | } | |
2215 | ||
2216 | ctx.rx_sc = rx_sc; | |
182879f8 | 2217 | ctx.secy = secy; |
3cf3227a AT |
2218 | ret = macsec_offload(ops->mdo_del_rxsc, &ctx); |
2219 | if (ret) | |
2220 | goto cleanup; | |
2221 | } | |
2222 | ||
c09440f7 SD |
2223 | free_rx_sc(rx_sc); |
2224 | rtnl_unlock(); | |
2225 | ||
2226 | return 0; | |
3cf3227a AT |
2227 | |
2228 | cleanup: | |
2229 | rtnl_unlock(); | |
2230 | return ret; | |
c09440f7 SD |
2231 | } |
2232 | ||
2233 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) | |
2234 | { | |
2235 | struct nlattr **attrs = info->attrs; | |
2236 | struct net_device *dev; | |
2237 | struct macsec_secy *secy; | |
2238 | struct macsec_tx_sc *tx_sc; | |
2239 | struct macsec_tx_sa *tx_sa; | |
2240 | u8 assoc_num; | |
2241 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2242 | int ret; |
c09440f7 SD |
2243 | |
2244 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2245 | return -EINVAL; | |
2246 | ||
2247 | if (parse_sa_config(attrs, tb_sa)) | |
2248 | return -EINVAL; | |
2249 | ||
2250 | rtnl_lock(); | |
2251 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2252 | &dev, &secy, &tx_sc, &assoc_num); | |
2253 | if (IS_ERR(tx_sa)) { | |
2254 | rtnl_unlock(); | |
2255 | return PTR_ERR(tx_sa); | |
2256 | } | |
2257 | ||
2258 | if (tx_sa->active) { | |
2259 | rtnl_unlock(); | |
2260 | return -EBUSY; | |
2261 | } | |
2262 | ||
3cf3227a AT |
2263 | /* If h/w offloading is available, propagate to the device */ |
2264 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2265 | const struct macsec_ops *ops; | |
2266 | struct macsec_context ctx; | |
2267 | ||
2268 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2269 | if (!ops) { | |
2270 | ret = -EOPNOTSUPP; | |
2271 | goto cleanup; | |
2272 | } | |
2273 | ||
2274 | ctx.sa.assoc_num = assoc_num; | |
2275 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2276 | ctx.secy = secy; |
3cf3227a AT |
2277 | |
2278 | ret = macsec_offload(ops->mdo_del_txsa, &ctx); | |
2279 | if (ret) | |
2280 | goto cleanup; | |
2281 | } | |
2282 | ||
c09440f7 SD |
2283 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); |
2284 | clear_tx_sa(tx_sa); | |
2285 | ||
2286 | rtnl_unlock(); | |
2287 | ||
2288 | return 0; | |
3cf3227a AT |
2289 | |
2290 | cleanup: | |
2291 | rtnl_unlock(); | |
2292 | return ret; | |
c09440f7 SD |
2293 | } |
2294 | ||
2295 | static bool validate_upd_sa(struct nlattr **attrs) | |
2296 | { | |
2297 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
2298 | attrs[MACSEC_SA_ATTR_KEY] || | |
48ef50fa EM |
2299 | attrs[MACSEC_SA_ATTR_KEYID] || |
2300 | attrs[MACSEC_SA_ATTR_SSCI] || | |
2301 | attrs[MACSEC_SA_ATTR_SALT]) | |
c09440f7 SD |
2302 | return false; |
2303 | ||
2304 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
2305 | return false; | |
2306 | ||
c630d1fe | 2307 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
2308 | return false; |
2309 | ||
2310 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
2311 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
2312 | return false; | |
2313 | } | |
2314 | ||
2315 | return true; | |
2316 | } | |
2317 | ||
2318 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) | |
2319 | { | |
2320 | struct nlattr **attrs = info->attrs; | |
2321 | struct net_device *dev; | |
2322 | struct macsec_secy *secy; | |
2323 | struct macsec_tx_sc *tx_sc; | |
2324 | struct macsec_tx_sa *tx_sa; | |
2325 | u8 assoc_num; | |
2326 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2327 | bool was_operational, was_active; |
a21ecf0e | 2328 | pn_t prev_pn; |
3cf3227a | 2329 | int ret = 0; |
c09440f7 | 2330 | |
a21ecf0e EM |
2331 | prev_pn.full64 = 0; |
2332 | ||
c09440f7 SD |
2333 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2334 | return -EINVAL; | |
2335 | ||
2336 | if (parse_sa_config(attrs, tb_sa)) | |
2337 | return -EINVAL; | |
2338 | ||
2339 | if (!validate_upd_sa(tb_sa)) | |
2340 | return -EINVAL; | |
2341 | ||
2342 | rtnl_lock(); | |
2343 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2344 | &dev, &secy, &tx_sc, &assoc_num); | |
2345 | if (IS_ERR(tx_sa)) { | |
2346 | rtnl_unlock(); | |
2347 | return PTR_ERR(tx_sa); | |
2348 | } | |
2349 | ||
2350 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
48ef50fa EM |
2351 | int pn_len; |
2352 | ||
2353 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; | |
2354 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2355 | pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n", | |
2356 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2357 | rtnl_unlock(); | |
2358 | return -EINVAL; | |
2359 | } | |
2360 | ||
c09440f7 | 2361 | spin_lock_bh(&tx_sa->lock); |
a21ecf0e | 2362 | prev_pn = tx_sa->next_pn_halves; |
48ef50fa | 2363 | tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2364 | spin_unlock_bh(&tx_sa->lock); |
2365 | } | |
2366 | ||
3cf3227a | 2367 | was_active = tx_sa->active; |
c09440f7 SD |
2368 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2369 | tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2370 | ||
3cf3227a | 2371 | was_operational = secy->operational; |
c09440f7 SD |
2372 | if (assoc_num == tx_sc->encoding_sa) |
2373 | secy->operational = tx_sa->active; | |
2374 | ||
3cf3227a AT |
2375 | /* If h/w offloading is available, propagate to the device */ |
2376 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2377 | const struct macsec_ops *ops; | |
2378 | struct macsec_context ctx; | |
2379 | ||
2380 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2381 | if (!ops) { | |
2382 | ret = -EOPNOTSUPP; | |
2383 | goto cleanup; | |
2384 | } | |
2385 | ||
2386 | ctx.sa.assoc_num = assoc_num; | |
2387 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2388 | ctx.secy = secy; |
3cf3227a AT |
2389 | |
2390 | ret = macsec_offload(ops->mdo_upd_txsa, &ctx); | |
2391 | if (ret) | |
2392 | goto cleanup; | |
2393 | } | |
2394 | ||
c09440f7 SD |
2395 | rtnl_unlock(); |
2396 | ||
2397 | return 0; | |
3cf3227a AT |
2398 | |
2399 | cleanup: | |
2400 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2401 | spin_lock_bh(&tx_sa->lock); | |
a21ecf0e | 2402 | tx_sa->next_pn_halves = prev_pn; |
3cf3227a AT |
2403 | spin_unlock_bh(&tx_sa->lock); |
2404 | } | |
2405 | tx_sa->active = was_active; | |
2406 | secy->operational = was_operational; | |
2407 | rtnl_unlock(); | |
2408 | return ret; | |
c09440f7 SD |
2409 | } |
2410 | ||
2411 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2412 | { | |
2413 | struct nlattr **attrs = info->attrs; | |
2414 | struct net_device *dev; | |
2415 | struct macsec_secy *secy; | |
2416 | struct macsec_rx_sc *rx_sc; | |
2417 | struct macsec_rx_sa *rx_sa; | |
2418 | u8 assoc_num; | |
2419 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2420 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2421 | bool was_active; |
a21ecf0e | 2422 | pn_t prev_pn; |
3cf3227a | 2423 | int ret = 0; |
c09440f7 | 2424 | |
a21ecf0e EM |
2425 | prev_pn.full64 = 0; |
2426 | ||
c09440f7 SD |
2427 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2428 | return -EINVAL; | |
2429 | ||
2430 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2431 | return -EINVAL; | |
2432 | ||
2433 | if (parse_sa_config(attrs, tb_sa)) | |
2434 | return -EINVAL; | |
2435 | ||
2436 | if (!validate_upd_sa(tb_sa)) | |
2437 | return -EINVAL; | |
2438 | ||
2439 | rtnl_lock(); | |
2440 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2441 | &dev, &secy, &rx_sc, &assoc_num); | |
2442 | if (IS_ERR(rx_sa)) { | |
2443 | rtnl_unlock(); | |
2444 | return PTR_ERR(rx_sa); | |
2445 | } | |
2446 | ||
2447 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
48ef50fa EM |
2448 | int pn_len; |
2449 | ||
2450 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; | |
2451 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2452 | pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n", | |
2453 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2454 | rtnl_unlock(); | |
2455 | return -EINVAL; | |
2456 | } | |
2457 | ||
c09440f7 | 2458 | spin_lock_bh(&rx_sa->lock); |
a21ecf0e | 2459 | prev_pn = rx_sa->next_pn_halves; |
48ef50fa | 2460 | rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2461 | spin_unlock_bh(&rx_sa->lock); |
2462 | } | |
2463 | ||
3cf3227a | 2464 | was_active = rx_sa->active; |
c09440f7 SD |
2465 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2466 | rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2467 | ||
3cf3227a AT |
2468 | /* If h/w offloading is available, propagate to the device */ |
2469 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2470 | const struct macsec_ops *ops; | |
2471 | struct macsec_context ctx; | |
2472 | ||
2473 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2474 | if (!ops) { | |
2475 | ret = -EOPNOTSUPP; | |
2476 | goto cleanup; | |
2477 | } | |
2478 | ||
2479 | ctx.sa.assoc_num = assoc_num; | |
2480 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 2481 | ctx.secy = secy; |
3cf3227a AT |
2482 | |
2483 | ret = macsec_offload(ops->mdo_upd_rxsa, &ctx); | |
2484 | if (ret) | |
2485 | goto cleanup; | |
2486 | } | |
2487 | ||
c09440f7 SD |
2488 | rtnl_unlock(); |
2489 | return 0; | |
3cf3227a AT |
2490 | |
2491 | cleanup: | |
2492 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2493 | spin_lock_bh(&rx_sa->lock); | |
a21ecf0e | 2494 | rx_sa->next_pn_halves = prev_pn; |
3cf3227a AT |
2495 | spin_unlock_bh(&rx_sa->lock); |
2496 | } | |
2497 | rx_sa->active = was_active; | |
2498 | rtnl_unlock(); | |
2499 | return ret; | |
c09440f7 SD |
2500 | } |
2501 | ||
2502 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2503 | { | |
2504 | struct nlattr **attrs = info->attrs; | |
2505 | struct net_device *dev; | |
2506 | struct macsec_secy *secy; | |
2507 | struct macsec_rx_sc *rx_sc; | |
2508 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a AT |
2509 | unsigned int prev_n_rx_sc; |
2510 | bool was_active; | |
2511 | int ret; | |
c09440f7 SD |
2512 | |
2513 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2514 | return -EINVAL; | |
2515 | ||
2516 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2517 | return -EINVAL; | |
2518 | ||
2519 | if (!validate_add_rxsc(tb_rxsc)) | |
2520 | return -EINVAL; | |
2521 | ||
2522 | rtnl_lock(); | |
2523 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
2524 | if (IS_ERR(rx_sc)) { | |
2525 | rtnl_unlock(); | |
2526 | return PTR_ERR(rx_sc); | |
2527 | } | |
2528 | ||
3cf3227a AT |
2529 | was_active = rx_sc->active; |
2530 | prev_n_rx_sc = secy->n_rx_sc; | |
c09440f7 SD |
2531 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { |
2532 | bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
2533 | ||
2534 | if (rx_sc->active != new) | |
2535 | secy->n_rx_sc += new ? 1 : -1; | |
2536 | ||
2537 | rx_sc->active = new; | |
2538 | } | |
2539 | ||
3cf3227a AT |
2540 | /* If h/w offloading is available, propagate to the device */ |
2541 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2542 | const struct macsec_ops *ops; | |
2543 | struct macsec_context ctx; | |
2544 | ||
2545 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2546 | if (!ops) { | |
2547 | ret = -EOPNOTSUPP; | |
2548 | goto cleanup; | |
2549 | } | |
2550 | ||
2551 | ctx.rx_sc = rx_sc; | |
182879f8 | 2552 | ctx.secy = secy; |
3cf3227a AT |
2553 | |
2554 | ret = macsec_offload(ops->mdo_upd_rxsc, &ctx); | |
2555 | if (ret) | |
2556 | goto cleanup; | |
2557 | } | |
2558 | ||
c09440f7 SD |
2559 | rtnl_unlock(); |
2560 | ||
2561 | return 0; | |
3cf3227a AT |
2562 | |
2563 | cleanup: | |
2564 | secy->n_rx_sc = prev_n_rx_sc; | |
2565 | rx_sc->active = was_active; | |
2566 | rtnl_unlock(); | |
2567 | return ret; | |
c09440f7 SD |
2568 | } |
2569 | ||
dcb780fb AT |
2570 | static bool macsec_is_configured(struct macsec_dev *macsec) |
2571 | { | |
2572 | struct macsec_secy *secy = &macsec->secy; | |
2573 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2574 | int i; | |
2575 | ||
80df4706 | 2576 | if (secy->rx_sc) |
dcb780fb AT |
2577 | return true; |
2578 | ||
2579 | for (i = 0; i < MACSEC_NUM_AN; i++) | |
2580 | if (tx_sc->sa[i]) | |
2581 | return true; | |
2582 | ||
2583 | return false; | |
2584 | } | |
2585 | ||
2586 | static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info) | |
2587 | { | |
2588 | struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1]; | |
2589 | enum macsec_offload offload, prev_offload; | |
2590 | int (*func)(struct macsec_context *ctx); | |
2591 | struct nlattr **attrs = info->attrs; | |
a249f805 | 2592 | struct net_device *dev; |
dcb780fb AT |
2593 | const struct macsec_ops *ops; |
2594 | struct macsec_context ctx; | |
2595 | struct macsec_dev *macsec; | |
f3b4a00f | 2596 | int ret = 0; |
dcb780fb AT |
2597 | |
2598 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2599 | return -EINVAL; | |
2600 | ||
2601 | if (!attrs[MACSEC_ATTR_OFFLOAD]) | |
2602 | return -EINVAL; | |
2603 | ||
2604 | if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX, | |
2605 | attrs[MACSEC_ATTR_OFFLOAD], | |
2606 | macsec_genl_offload_policy, NULL)) | |
2607 | return -EINVAL; | |
2608 | ||
f3b4a00f EH |
2609 | rtnl_lock(); |
2610 | ||
dcb780fb | 2611 | dev = get_dev_from_nl(genl_info_net(info), attrs); |
f3b4a00f EH |
2612 | if (IS_ERR(dev)) { |
2613 | ret = PTR_ERR(dev); | |
2614 | goto out; | |
2615 | } | |
dcb780fb AT |
2616 | macsec = macsec_priv(dev); |
2617 | ||
f3b4a00f EH |
2618 | if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) { |
2619 | ret = -EINVAL; | |
2620 | goto out; | |
2621 | } | |
aa81700c | 2622 | |
dcb780fb AT |
2623 | offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]); |
2624 | if (macsec->offload == offload) | |
f3b4a00f | 2625 | goto out; |
dcb780fb AT |
2626 | |
2627 | /* Check if the offloading mode is supported by the underlying layers */ | |
2628 | if (offload != MACSEC_OFFLOAD_OFF && | |
f3b4a00f EH |
2629 | !macsec_check_offload(offload, macsec)) { |
2630 | ret = -EOPNOTSUPP; | |
2631 | goto out; | |
2632 | } | |
dcb780fb | 2633 | |
dcb780fb | 2634 | /* Check if the net device is busy. */ |
f3b4a00f EH |
2635 | if (netif_running(dev)) { |
2636 | ret = -EBUSY; | |
2637 | goto out; | |
2638 | } | |
dcb780fb AT |
2639 | |
2640 | prev_offload = macsec->offload; | |
2641 | macsec->offload = offload; | |
2642 | ||
2643 | /* Check if the device already has rules configured: we do not support | |
2644 | * rules migration. | |
2645 | */ | |
2646 | if (macsec_is_configured(macsec)) { | |
2647 | ret = -EBUSY; | |
2648 | goto rollback; | |
2649 | } | |
2650 | ||
2651 | ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload, | |
2652 | macsec, &ctx); | |
2653 | if (!ops) { | |
2654 | ret = -EOPNOTSUPP; | |
2655 | goto rollback; | |
2656 | } | |
2657 | ||
2658 | if (prev_offload == MACSEC_OFFLOAD_OFF) | |
2659 | func = ops->mdo_add_secy; | |
2660 | else | |
2661 | func = ops->mdo_del_secy; | |
2662 | ||
2663 | ctx.secy = &macsec->secy; | |
2664 | ret = macsec_offload(func, &ctx); | |
2665 | if (ret) | |
2666 | goto rollback; | |
2667 | ||
29ca3cdf | 2668 | rtnl_unlock(); |
dcb780fb AT |
2669 | return 0; |
2670 | ||
2671 | rollback: | |
2672 | macsec->offload = prev_offload; | |
f3b4a00f | 2673 | out: |
dcb780fb AT |
2674 | rtnl_unlock(); |
2675 | return ret; | |
2676 | } | |
2677 | ||
b62c3624 DB |
2678 | static void get_tx_sa_stats(struct net_device *dev, int an, |
2679 | struct macsec_tx_sa *tx_sa, | |
2680 | struct macsec_tx_sa_stats *sum) | |
c09440f7 | 2681 | { |
b62c3624 | 2682 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2683 | int cpu; |
2684 | ||
b62c3624 DB |
2685 | /* If h/w offloading is available, propagate to the device */ |
2686 | if (macsec_is_offloaded(macsec)) { | |
2687 | const struct macsec_ops *ops; | |
2688 | struct macsec_context ctx; | |
2689 | ||
2690 | ops = macsec_get_ops(macsec, &ctx); | |
2691 | if (ops) { | |
2692 | ctx.sa.assoc_num = an; | |
2693 | ctx.sa.tx_sa = tx_sa; | |
2694 | ctx.stats.tx_sa_stats = sum; | |
2695 | ctx.secy = &macsec_priv(dev)->secy; | |
2696 | macsec_offload(ops->mdo_get_tx_sa_stats, &ctx); | |
2697 | } | |
2698 | return; | |
2699 | } | |
2700 | ||
c09440f7 | 2701 | for_each_possible_cpu(cpu) { |
b62c3624 DB |
2702 | const struct macsec_tx_sa_stats *stats = |
2703 | per_cpu_ptr(tx_sa->stats, cpu); | |
c09440f7 | 2704 | |
b62c3624 DB |
2705 | sum->OutPktsProtected += stats->OutPktsProtected; |
2706 | sum->OutPktsEncrypted += stats->OutPktsEncrypted; | |
c09440f7 | 2707 | } |
b62c3624 | 2708 | } |
c09440f7 | 2709 | |
b62c3624 DB |
2710 | static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum) |
2711 | { | |
2712 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, | |
2713 | sum->OutPktsProtected) || | |
2714 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
2715 | sum->OutPktsEncrypted)) | |
c09440f7 SD |
2716 | return -EMSGSIZE; |
2717 | ||
2718 | return 0; | |
2719 | } | |
2720 | ||
b62c3624 DB |
2721 | static void get_rx_sa_stats(struct net_device *dev, |
2722 | struct macsec_rx_sc *rx_sc, int an, | |
2723 | struct macsec_rx_sa *rx_sa, | |
2724 | struct macsec_rx_sa_stats *sum) | |
c09440f7 | 2725 | { |
b62c3624 | 2726 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2727 | int cpu; |
2728 | ||
b62c3624 DB |
2729 | /* If h/w offloading is available, propagate to the device */ |
2730 | if (macsec_is_offloaded(macsec)) { | |
2731 | const struct macsec_ops *ops; | |
2732 | struct macsec_context ctx; | |
2733 | ||
2734 | ops = macsec_get_ops(macsec, &ctx); | |
2735 | if (ops) { | |
2736 | ctx.sa.assoc_num = an; | |
2737 | ctx.sa.rx_sa = rx_sa; | |
2738 | ctx.stats.rx_sa_stats = sum; | |
2739 | ctx.secy = &macsec_priv(dev)->secy; | |
2740 | ctx.rx_sc = rx_sc; | |
2741 | macsec_offload(ops->mdo_get_rx_sa_stats, &ctx); | |
2742 | } | |
2743 | return; | |
2744 | } | |
2745 | ||
c09440f7 | 2746 | for_each_possible_cpu(cpu) { |
b62c3624 DB |
2747 | const struct macsec_rx_sa_stats *stats = |
2748 | per_cpu_ptr(rx_sa->stats, cpu); | |
c09440f7 | 2749 | |
b62c3624 DB |
2750 | sum->InPktsOK += stats->InPktsOK; |
2751 | sum->InPktsInvalid += stats->InPktsInvalid; | |
2752 | sum->InPktsNotValid += stats->InPktsNotValid; | |
2753 | sum->InPktsNotUsingSA += stats->InPktsNotUsingSA; | |
2754 | sum->InPktsUnusedSA += stats->InPktsUnusedSA; | |
c09440f7 | 2755 | } |
b62c3624 | 2756 | } |
c09440f7 | 2757 | |
b62c3624 DB |
2758 | static int copy_rx_sa_stats(struct sk_buff *skb, |
2759 | struct macsec_rx_sa_stats *sum) | |
2760 | { | |
2761 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) || | |
2762 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, | |
2763 | sum->InPktsInvalid) || | |
2764 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, | |
2765 | sum->InPktsNotValid) || | |
2766 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
2767 | sum->InPktsNotUsingSA) || | |
2768 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
2769 | sum->InPktsUnusedSA)) | |
c09440f7 SD |
2770 | return -EMSGSIZE; |
2771 | ||
2772 | return 0; | |
2773 | } | |
2774 | ||
b62c3624 DB |
2775 | static void get_rx_sc_stats(struct net_device *dev, |
2776 | struct macsec_rx_sc *rx_sc, | |
2777 | struct macsec_rx_sc_stats *sum) | |
c09440f7 | 2778 | { |
b62c3624 | 2779 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2780 | int cpu; |
2781 | ||
b62c3624 DB |
2782 | /* If h/w offloading is available, propagate to the device */ |
2783 | if (macsec_is_offloaded(macsec)) { | |
2784 | const struct macsec_ops *ops; | |
2785 | struct macsec_context ctx; | |
2786 | ||
2787 | ops = macsec_get_ops(macsec, &ctx); | |
2788 | if (ops) { | |
2789 | ctx.stats.rx_sc_stats = sum; | |
2790 | ctx.secy = &macsec_priv(dev)->secy; | |
2791 | ctx.rx_sc = rx_sc; | |
2792 | macsec_offload(ops->mdo_get_rx_sc_stats, &ctx); | |
2793 | } | |
2794 | return; | |
2795 | } | |
2796 | ||
c09440f7 SD |
2797 | for_each_possible_cpu(cpu) { |
2798 | const struct pcpu_rx_sc_stats *stats; | |
2799 | struct macsec_rx_sc_stats tmp; | |
2800 | unsigned int start; | |
2801 | ||
b62c3624 | 2802 | stats = per_cpu_ptr(rx_sc->stats, cpu); |
c09440f7 | 2803 | do { |
068c38ad | 2804 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2805 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2806 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2807 | |
b62c3624 DB |
2808 | sum->InOctetsValidated += tmp.InOctetsValidated; |
2809 | sum->InOctetsDecrypted += tmp.InOctetsDecrypted; | |
2810 | sum->InPktsUnchecked += tmp.InPktsUnchecked; | |
2811 | sum->InPktsDelayed += tmp.InPktsDelayed; | |
2812 | sum->InPktsOK += tmp.InPktsOK; | |
2813 | sum->InPktsInvalid += tmp.InPktsInvalid; | |
2814 | sum->InPktsLate += tmp.InPktsLate; | |
2815 | sum->InPktsNotValid += tmp.InPktsNotValid; | |
2816 | sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA; | |
2817 | sum->InPktsUnusedSA += tmp.InPktsUnusedSA; | |
c09440f7 | 2818 | } |
b62c3624 | 2819 | } |
c09440f7 | 2820 | |
b62c3624 DB |
2821 | static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum) |
2822 | { | |
f60d94c0 | 2823 | if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
b62c3624 | 2824 | sum->InOctetsValidated, |
f60d94c0 ND |
2825 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2826 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, | |
b62c3624 | 2827 | sum->InOctetsDecrypted, |
f60d94c0 ND |
2828 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2829 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, | |
b62c3624 | 2830 | sum->InPktsUnchecked, |
f60d94c0 ND |
2831 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2832 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, | |
b62c3624 | 2833 | sum->InPktsDelayed, |
f60d94c0 ND |
2834 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2835 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, | |
b62c3624 | 2836 | sum->InPktsOK, |
f60d94c0 ND |
2837 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2838 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, | |
b62c3624 | 2839 | sum->InPktsInvalid, |
f60d94c0 ND |
2840 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2841 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, | |
b62c3624 | 2842 | sum->InPktsLate, |
f60d94c0 ND |
2843 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2844 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, | |
b62c3624 | 2845 | sum->InPktsNotValid, |
f60d94c0 ND |
2846 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2847 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
b62c3624 | 2848 | sum->InPktsNotUsingSA, |
f60d94c0 ND |
2849 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2850 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
b62c3624 | 2851 | sum->InPktsUnusedSA, |
f60d94c0 | 2852 | MACSEC_RXSC_STATS_ATTR_PAD)) |
c09440f7 SD |
2853 | return -EMSGSIZE; |
2854 | ||
2855 | return 0; | |
2856 | } | |
2857 | ||
b62c3624 DB |
2858 | static void get_tx_sc_stats(struct net_device *dev, |
2859 | struct macsec_tx_sc_stats *sum) | |
c09440f7 | 2860 | { |
b62c3624 | 2861 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2862 | int cpu; |
2863 | ||
b62c3624 DB |
2864 | /* If h/w offloading is available, propagate to the device */ |
2865 | if (macsec_is_offloaded(macsec)) { | |
2866 | const struct macsec_ops *ops; | |
2867 | struct macsec_context ctx; | |
2868 | ||
2869 | ops = macsec_get_ops(macsec, &ctx); | |
2870 | if (ops) { | |
2871 | ctx.stats.tx_sc_stats = sum; | |
2872 | ctx.secy = &macsec_priv(dev)->secy; | |
2873 | macsec_offload(ops->mdo_get_tx_sc_stats, &ctx); | |
2874 | } | |
2875 | return; | |
2876 | } | |
2877 | ||
c09440f7 SD |
2878 | for_each_possible_cpu(cpu) { |
2879 | const struct pcpu_tx_sc_stats *stats; | |
2880 | struct macsec_tx_sc_stats tmp; | |
2881 | unsigned int start; | |
2882 | ||
b62c3624 | 2883 | stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu); |
c09440f7 | 2884 | do { |
068c38ad | 2885 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2886 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2887 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2888 | |
b62c3624 DB |
2889 | sum->OutPktsProtected += tmp.OutPktsProtected; |
2890 | sum->OutPktsEncrypted += tmp.OutPktsEncrypted; | |
2891 | sum->OutOctetsProtected += tmp.OutOctetsProtected; | |
2892 | sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted; | |
c09440f7 | 2893 | } |
b62c3624 | 2894 | } |
c09440f7 | 2895 | |
b62c3624 DB |
2896 | static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum) |
2897 | { | |
f60d94c0 | 2898 | if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
b62c3624 | 2899 | sum->OutPktsProtected, |
f60d94c0 ND |
2900 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2901 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
b62c3624 | 2902 | sum->OutPktsEncrypted, |
f60d94c0 ND |
2903 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2904 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, | |
b62c3624 | 2905 | sum->OutOctetsProtected, |
f60d94c0 ND |
2906 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2907 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, | |
b62c3624 | 2908 | sum->OutOctetsEncrypted, |
f60d94c0 | 2909 | MACSEC_TXSC_STATS_ATTR_PAD)) |
c09440f7 SD |
2910 | return -EMSGSIZE; |
2911 | ||
2912 | return 0; | |
2913 | } | |
2914 | ||
b62c3624 | 2915 | static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum) |
c09440f7 | 2916 | { |
b62c3624 | 2917 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2918 | int cpu; |
2919 | ||
b62c3624 DB |
2920 | /* If h/w offloading is available, propagate to the device */ |
2921 | if (macsec_is_offloaded(macsec)) { | |
2922 | const struct macsec_ops *ops; | |
2923 | struct macsec_context ctx; | |
2924 | ||
2925 | ops = macsec_get_ops(macsec, &ctx); | |
2926 | if (ops) { | |
2927 | ctx.stats.dev_stats = sum; | |
2928 | ctx.secy = &macsec_priv(dev)->secy; | |
2929 | macsec_offload(ops->mdo_get_dev_stats, &ctx); | |
2930 | } | |
2931 | return; | |
2932 | } | |
2933 | ||
c09440f7 SD |
2934 | for_each_possible_cpu(cpu) { |
2935 | const struct pcpu_secy_stats *stats; | |
2936 | struct macsec_dev_stats tmp; | |
2937 | unsigned int start; | |
2938 | ||
b62c3624 | 2939 | stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu); |
c09440f7 | 2940 | do { |
068c38ad | 2941 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2942 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2943 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2944 | |
b62c3624 DB |
2945 | sum->OutPktsUntagged += tmp.OutPktsUntagged; |
2946 | sum->InPktsUntagged += tmp.InPktsUntagged; | |
2947 | sum->OutPktsTooLong += tmp.OutPktsTooLong; | |
2948 | sum->InPktsNoTag += tmp.InPktsNoTag; | |
2949 | sum->InPktsBadTag += tmp.InPktsBadTag; | |
2950 | sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI; | |
2951 | sum->InPktsNoSCI += tmp.InPktsNoSCI; | |
2952 | sum->InPktsOverrun += tmp.InPktsOverrun; | |
c09440f7 | 2953 | } |
b62c3624 | 2954 | } |
c09440f7 | 2955 | |
b62c3624 DB |
2956 | static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum) |
2957 | { | |
f60d94c0 | 2958 | if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
b62c3624 | 2959 | sum->OutPktsUntagged, |
f60d94c0 ND |
2960 | MACSEC_SECY_STATS_ATTR_PAD) || |
2961 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, | |
b62c3624 | 2962 | sum->InPktsUntagged, |
f60d94c0 ND |
2963 | MACSEC_SECY_STATS_ATTR_PAD) || |
2964 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, | |
b62c3624 | 2965 | sum->OutPktsTooLong, |
f60d94c0 ND |
2966 | MACSEC_SECY_STATS_ATTR_PAD) || |
2967 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, | |
b62c3624 | 2968 | sum->InPktsNoTag, |
f60d94c0 ND |
2969 | MACSEC_SECY_STATS_ATTR_PAD) || |
2970 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, | |
b62c3624 | 2971 | sum->InPktsBadTag, |
f60d94c0 ND |
2972 | MACSEC_SECY_STATS_ATTR_PAD) || |
2973 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, | |
b62c3624 | 2974 | sum->InPktsUnknownSCI, |
f60d94c0 ND |
2975 | MACSEC_SECY_STATS_ATTR_PAD) || |
2976 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, | |
b62c3624 | 2977 | sum->InPktsNoSCI, |
f60d94c0 ND |
2978 | MACSEC_SECY_STATS_ATTR_PAD) || |
2979 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, | |
b62c3624 | 2980 | sum->InPktsOverrun, |
f60d94c0 | 2981 | MACSEC_SECY_STATS_ATTR_PAD)) |
c09440f7 SD |
2982 | return -EMSGSIZE; |
2983 | ||
2984 | return 0; | |
2985 | } | |
2986 | ||
2987 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) | |
2988 | { | |
2989 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ae0be8de MK |
2990 | struct nlattr *secy_nest = nla_nest_start_noflag(skb, |
2991 | MACSEC_ATTR_SECY); | |
ccfdec90 | 2992 | u64 csid; |
c09440f7 SD |
2993 | |
2994 | if (!secy_nest) | |
2995 | return 1; | |
2996 | ||
ccfdec90 FW |
2997 | switch (secy->key_len) { |
2998 | case MACSEC_GCM_AES_128_SAK_LEN: | |
48ef50fa | 2999 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
3000 | break; |
3001 | case MACSEC_GCM_AES_256_SAK_LEN: | |
48ef50fa | 3002 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
ccfdec90 FW |
3003 | break; |
3004 | default: | |
3005 | goto cancel; | |
3006 | } | |
3007 | ||
f60d94c0 ND |
3008 | if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
3009 | MACSEC_SECY_ATTR_PAD) || | |
3010 | nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, | |
ccfdec90 | 3011 | csid, MACSEC_SECY_ATTR_PAD) || |
c09440f7 SD |
3012 | nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
3013 | nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || | |
3014 | nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || | |
3015 | nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || | |
3016 | nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || | |
3017 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || | |
3018 | nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || | |
3019 | nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || | |
3020 | nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || | |
3021 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) | |
3022 | goto cancel; | |
3023 | ||
3024 | if (secy->replay_protect) { | |
3025 | if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) | |
3026 | goto cancel; | |
3027 | } | |
3028 | ||
3029 | nla_nest_end(skb, secy_nest); | |
3030 | return 0; | |
3031 | ||
3032 | cancel: | |
3033 | nla_nest_cancel(skb, secy_nest); | |
3034 | return 1; | |
3035 | } | |
3036 | ||
e1427237 FW |
3037 | static noinline_for_stack int |
3038 | dump_secy(struct macsec_secy *secy, struct net_device *dev, | |
3039 | struct sk_buff *skb, struct netlink_callback *cb) | |
c09440f7 | 3040 | { |
b62c3624 DB |
3041 | struct macsec_tx_sc_stats tx_sc_stats = {0, }; |
3042 | struct macsec_tx_sa_stats tx_sa_stats = {0, }; | |
3043 | struct macsec_rx_sc_stats rx_sc_stats = {0, }; | |
3044 | struct macsec_rx_sa_stats rx_sa_stats = {0, }; | |
dcb780fb | 3045 | struct macsec_dev *macsec = netdev_priv(dev); |
b62c3624 | 3046 | struct macsec_dev_stats dev_stats = {0, }; |
c09440f7 SD |
3047 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
3048 | struct nlattr *txsa_list, *rxsc_list; | |
dcb780fb | 3049 | struct macsec_rx_sc *rx_sc; |
c09440f7 | 3050 | struct nlattr *attr; |
dcb780fb AT |
3051 | void *hdr; |
3052 | int i, j; | |
c09440f7 SD |
3053 | |
3054 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
3055 | &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); | |
3056 | if (!hdr) | |
3057 | return -EMSGSIZE; | |
3058 | ||
0a833c29 | 3059 | genl_dump_check_consistent(cb, hdr); |
c09440f7 SD |
3060 | |
3061 | if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) | |
3062 | goto nla_put_failure; | |
3063 | ||
dcb780fb AT |
3064 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD); |
3065 | if (!attr) | |
3066 | goto nla_put_failure; | |
3067 | if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload)) | |
3068 | goto nla_put_failure; | |
3069 | nla_nest_end(skb, attr); | |
3070 | ||
c09440f7 SD |
3071 | if (nla_put_secy(secy, skb)) |
3072 | goto nla_put_failure; | |
3073 | ||
ae0be8de | 3074 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS); |
c09440f7 SD |
3075 | if (!attr) |
3076 | goto nla_put_failure; | |
b62c3624 DB |
3077 | |
3078 | get_tx_sc_stats(dev, &tx_sc_stats); | |
3079 | if (copy_tx_sc_stats(skb, &tx_sc_stats)) { | |
c09440f7 SD |
3080 | nla_nest_cancel(skb, attr); |
3081 | goto nla_put_failure; | |
3082 | } | |
3083 | nla_nest_end(skb, attr); | |
3084 | ||
ae0be8de | 3085 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS); |
c09440f7 SD |
3086 | if (!attr) |
3087 | goto nla_put_failure; | |
b62c3624 DB |
3088 | get_secy_stats(dev, &dev_stats); |
3089 | if (copy_secy_stats(skb, &dev_stats)) { | |
c09440f7 SD |
3090 | nla_nest_cancel(skb, attr); |
3091 | goto nla_put_failure; | |
3092 | } | |
3093 | nla_nest_end(skb, attr); | |
3094 | ||
ae0be8de | 3095 | txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST); |
c09440f7 SD |
3096 | if (!txsa_list) |
3097 | goto nla_put_failure; | |
3098 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { | |
3099 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); | |
3100 | struct nlattr *txsa_nest; | |
48ef50fa EM |
3101 | u64 pn; |
3102 | int pn_len; | |
c09440f7 SD |
3103 | |
3104 | if (!tx_sa) | |
3105 | continue; | |
3106 | ||
ae0be8de | 3107 | txsa_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
3108 | if (!txsa_nest) { |
3109 | nla_nest_cancel(skb, txsa_list); | |
3110 | goto nla_put_failure; | |
3111 | } | |
3112 | ||
b62c3624 DB |
3113 | attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS); |
3114 | if (!attr) { | |
3115 | nla_nest_cancel(skb, txsa_nest); | |
3116 | nla_nest_cancel(skb, txsa_list); | |
3117 | goto nla_put_failure; | |
3118 | } | |
3119 | memset(&tx_sa_stats, 0, sizeof(tx_sa_stats)); | |
3120 | get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats); | |
3121 | if (copy_tx_sa_stats(skb, &tx_sa_stats)) { | |
3122 | nla_nest_cancel(skb, attr); | |
3123 | nla_nest_cancel(skb, txsa_nest); | |
3124 | nla_nest_cancel(skb, txsa_list); | |
3125 | goto nla_put_failure; | |
3126 | } | |
3127 | nla_nest_end(skb, attr); | |
3128 | ||
48ef50fa EM |
3129 | if (secy->xpn) { |
3130 | pn = tx_sa->next_pn; | |
3131 | pn_len = MACSEC_XPN_PN_LEN; | |
3132 | } else { | |
3133 | pn = tx_sa->next_pn_halves.lower; | |
3134 | pn_len = MACSEC_DEFAULT_PN_LEN; | |
3135 | } | |
3136 | ||
c09440f7 | 3137 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
48ef50fa | 3138 | nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
8acca6ac | 3139 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
48ef50fa | 3140 | (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) || |
c09440f7 SD |
3141 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
3142 | nla_nest_cancel(skb, txsa_nest); | |
3143 | nla_nest_cancel(skb, txsa_list); | |
3144 | goto nla_put_failure; | |
3145 | } | |
3146 | ||
c09440f7 SD |
3147 | nla_nest_end(skb, txsa_nest); |
3148 | } | |
3149 | nla_nest_end(skb, txsa_list); | |
3150 | ||
ae0be8de | 3151 | rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST); |
c09440f7 SD |
3152 | if (!rxsc_list) |
3153 | goto nla_put_failure; | |
3154 | ||
3155 | j = 1; | |
3156 | for_each_rxsc_rtnl(secy, rx_sc) { | |
3157 | int k; | |
3158 | struct nlattr *rxsa_list; | |
ae0be8de | 3159 | struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
3160 | |
3161 | if (!rxsc_nest) { | |
3162 | nla_nest_cancel(skb, rxsc_list); | |
3163 | goto nla_put_failure; | |
3164 | } | |
3165 | ||
3166 | if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || | |
f60d94c0 ND |
3167 | nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
3168 | MACSEC_RXSC_ATTR_PAD)) { | |
c09440f7 SD |
3169 | nla_nest_cancel(skb, rxsc_nest); |
3170 | nla_nest_cancel(skb, rxsc_list); | |
3171 | goto nla_put_failure; | |
3172 | } | |
3173 | ||
ae0be8de | 3174 | attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS); |
c09440f7 SD |
3175 | if (!attr) { |
3176 | nla_nest_cancel(skb, rxsc_nest); | |
3177 | nla_nest_cancel(skb, rxsc_list); | |
3178 | goto nla_put_failure; | |
3179 | } | |
b62c3624 DB |
3180 | memset(&rx_sc_stats, 0, sizeof(rx_sc_stats)); |
3181 | get_rx_sc_stats(dev, rx_sc, &rx_sc_stats); | |
3182 | if (copy_rx_sc_stats(skb, &rx_sc_stats)) { | |
c09440f7 SD |
3183 | nla_nest_cancel(skb, attr); |
3184 | nla_nest_cancel(skb, rxsc_nest); | |
3185 | nla_nest_cancel(skb, rxsc_list); | |
3186 | goto nla_put_failure; | |
3187 | } | |
3188 | nla_nest_end(skb, attr); | |
3189 | ||
ae0be8de MK |
3190 | rxsa_list = nla_nest_start_noflag(skb, |
3191 | MACSEC_RXSC_ATTR_SA_LIST); | |
c09440f7 SD |
3192 | if (!rxsa_list) { |
3193 | nla_nest_cancel(skb, rxsc_nest); | |
3194 | nla_nest_cancel(skb, rxsc_list); | |
3195 | goto nla_put_failure; | |
3196 | } | |
3197 | ||
3198 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { | |
3199 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); | |
3200 | struct nlattr *rxsa_nest; | |
48ef50fa EM |
3201 | u64 pn; |
3202 | int pn_len; | |
c09440f7 SD |
3203 | |
3204 | if (!rx_sa) | |
3205 | continue; | |
3206 | ||
ae0be8de | 3207 | rxsa_nest = nla_nest_start_noflag(skb, k++); |
c09440f7 SD |
3208 | if (!rxsa_nest) { |
3209 | nla_nest_cancel(skb, rxsa_list); | |
3210 | nla_nest_cancel(skb, rxsc_nest); | |
3211 | nla_nest_cancel(skb, rxsc_list); | |
3212 | goto nla_put_failure; | |
3213 | } | |
3214 | ||
ae0be8de MK |
3215 | attr = nla_nest_start_noflag(skb, |
3216 | MACSEC_SA_ATTR_STATS); | |
c09440f7 SD |
3217 | if (!attr) { |
3218 | nla_nest_cancel(skb, rxsa_list); | |
3219 | nla_nest_cancel(skb, rxsc_nest); | |
3220 | nla_nest_cancel(skb, rxsc_list); | |
3221 | goto nla_put_failure; | |
3222 | } | |
b62c3624 DB |
3223 | memset(&rx_sa_stats, 0, sizeof(rx_sa_stats)); |
3224 | get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats); | |
3225 | if (copy_rx_sa_stats(skb, &rx_sa_stats)) { | |
c09440f7 SD |
3226 | nla_nest_cancel(skb, attr); |
3227 | nla_nest_cancel(skb, rxsa_list); | |
3228 | nla_nest_cancel(skb, rxsc_nest); | |
3229 | nla_nest_cancel(skb, rxsc_list); | |
3230 | goto nla_put_failure; | |
3231 | } | |
3232 | nla_nest_end(skb, attr); | |
3233 | ||
48ef50fa EM |
3234 | if (secy->xpn) { |
3235 | pn = rx_sa->next_pn; | |
3236 | pn_len = MACSEC_XPN_PN_LEN; | |
3237 | } else { | |
3238 | pn = rx_sa->next_pn_halves.lower; | |
3239 | pn_len = MACSEC_DEFAULT_PN_LEN; | |
3240 | } | |
3241 | ||
c09440f7 | 3242 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
48ef50fa | 3243 | nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
8acca6ac | 3244 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
48ef50fa | 3245 | (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) || |
c09440f7 SD |
3246 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
3247 | nla_nest_cancel(skb, rxsa_nest); | |
3248 | nla_nest_cancel(skb, rxsc_nest); | |
3249 | nla_nest_cancel(skb, rxsc_list); | |
3250 | goto nla_put_failure; | |
3251 | } | |
3252 | nla_nest_end(skb, rxsa_nest); | |
3253 | } | |
3254 | ||
3255 | nla_nest_end(skb, rxsa_list); | |
3256 | nla_nest_end(skb, rxsc_nest); | |
3257 | } | |
3258 | ||
3259 | nla_nest_end(skb, rxsc_list); | |
3260 | ||
c09440f7 SD |
3261 | genlmsg_end(skb, hdr); |
3262 | ||
3263 | return 0; | |
3264 | ||
3265 | nla_put_failure: | |
c09440f7 SD |
3266 | genlmsg_cancel(skb, hdr); |
3267 | return -EMSGSIZE; | |
3268 | } | |
3269 | ||
96cfc505 SD |
3270 | static int macsec_generation = 1; /* protected by RTNL */ |
3271 | ||
c09440f7 SD |
3272 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
3273 | { | |
3274 | struct net *net = sock_net(skb->sk); | |
3275 | struct net_device *dev; | |
3276 | int dev_idx, d; | |
3277 | ||
3278 | dev_idx = cb->args[0]; | |
3279 | ||
3280 | d = 0; | |
c10c63ea | 3281 | rtnl_lock(); |
96cfc505 SD |
3282 | |
3283 | cb->seq = macsec_generation; | |
3284 | ||
c09440f7 SD |
3285 | for_each_netdev(net, dev) { |
3286 | struct macsec_secy *secy; | |
3287 | ||
3288 | if (d < dev_idx) | |
3289 | goto next; | |
3290 | ||
3291 | if (!netif_is_macsec(dev)) | |
3292 | goto next; | |
3293 | ||
3294 | secy = &macsec_priv(dev)->secy; | |
3295 | if (dump_secy(secy, dev, skb, cb) < 0) | |
3296 | goto done; | |
3297 | next: | |
3298 | d++; | |
3299 | } | |
3300 | ||
3301 | done: | |
c10c63ea | 3302 | rtnl_unlock(); |
c09440f7 SD |
3303 | cb->args[0] = d; |
3304 | return skb->len; | |
3305 | } | |
3306 | ||
66a9b928 | 3307 | static const struct genl_small_ops macsec_genl_ops[] = { |
c09440f7 SD |
3308 | { |
3309 | .cmd = MACSEC_CMD_GET_TXSC, | |
ef6243ac | 3310 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3311 | .dumpit = macsec_dump_txsc, |
c09440f7 SD |
3312 | }, |
3313 | { | |
3314 | .cmd = MACSEC_CMD_ADD_RXSC, | |
ef6243ac | 3315 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3316 | .doit = macsec_add_rxsc, |
c09440f7 SD |
3317 | .flags = GENL_ADMIN_PERM, |
3318 | }, | |
3319 | { | |
3320 | .cmd = MACSEC_CMD_DEL_RXSC, | |
ef6243ac | 3321 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3322 | .doit = macsec_del_rxsc, |
c09440f7 SD |
3323 | .flags = GENL_ADMIN_PERM, |
3324 | }, | |
3325 | { | |
3326 | .cmd = MACSEC_CMD_UPD_RXSC, | |
ef6243ac | 3327 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3328 | .doit = macsec_upd_rxsc, |
c09440f7 SD |
3329 | .flags = GENL_ADMIN_PERM, |
3330 | }, | |
3331 | { | |
3332 | .cmd = MACSEC_CMD_ADD_TXSA, | |
ef6243ac | 3333 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3334 | .doit = macsec_add_txsa, |
c09440f7 SD |
3335 | .flags = GENL_ADMIN_PERM, |
3336 | }, | |
3337 | { | |
3338 | .cmd = MACSEC_CMD_DEL_TXSA, | |
ef6243ac | 3339 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3340 | .doit = macsec_del_txsa, |
c09440f7 SD |
3341 | .flags = GENL_ADMIN_PERM, |
3342 | }, | |
3343 | { | |
3344 | .cmd = MACSEC_CMD_UPD_TXSA, | |
ef6243ac | 3345 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3346 | .doit = macsec_upd_txsa, |
c09440f7 SD |
3347 | .flags = GENL_ADMIN_PERM, |
3348 | }, | |
3349 | { | |
3350 | .cmd = MACSEC_CMD_ADD_RXSA, | |
ef6243ac | 3351 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3352 | .doit = macsec_add_rxsa, |
c09440f7 SD |
3353 | .flags = GENL_ADMIN_PERM, |
3354 | }, | |
3355 | { | |
3356 | .cmd = MACSEC_CMD_DEL_RXSA, | |
ef6243ac | 3357 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3358 | .doit = macsec_del_rxsa, |
c09440f7 SD |
3359 | .flags = GENL_ADMIN_PERM, |
3360 | }, | |
3361 | { | |
3362 | .cmd = MACSEC_CMD_UPD_RXSA, | |
ef6243ac | 3363 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3364 | .doit = macsec_upd_rxsa, |
c09440f7 SD |
3365 | .flags = GENL_ADMIN_PERM, |
3366 | }, | |
dcb780fb AT |
3367 | { |
3368 | .cmd = MACSEC_CMD_UPD_OFFLOAD, | |
3369 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
3370 | .doit = macsec_upd_offload, | |
3371 | .flags = GENL_ADMIN_PERM, | |
3372 | }, | |
c09440f7 SD |
3373 | }; |
3374 | ||
56989f6d | 3375 | static struct genl_family macsec_fam __ro_after_init = { |
489111e5 JB |
3376 | .name = MACSEC_GENL_NAME, |
3377 | .hdrsize = 0, | |
3378 | .version = MACSEC_GENL_VERSION, | |
3379 | .maxattr = MACSEC_ATTR_MAX, | |
3b0f31f2 | 3380 | .policy = macsec_genl_policy, |
489111e5 JB |
3381 | .netnsok = true, |
3382 | .module = THIS_MODULE, | |
66a9b928 JK |
3383 | .small_ops = macsec_genl_ops, |
3384 | .n_small_ops = ARRAY_SIZE(macsec_genl_ops), | |
9c5d03d3 | 3385 | .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1, |
489111e5 JB |
3386 | }; |
3387 | ||
c09440f7 SD |
3388 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
3389 | struct net_device *dev) | |
3390 | { | |
3391 | struct macsec_dev *macsec = netdev_priv(dev); | |
3392 | struct macsec_secy *secy = &macsec->secy; | |
3393 | struct pcpu_secy_stats *secy_stats; | |
3394 | int ret, len; | |
3395 | ||
3cf3227a | 3396 | if (macsec_is_offloaded(netdev_priv(dev))) { |
0a28bfd4 LN |
3397 | struct metadata_dst *md_dst = secy->tx_sc.md_dst; |
3398 | ||
3399 | skb_dst_drop(skb); | |
3400 | dst_hold(&md_dst->dst); | |
3401 | skb_dst_set(skb, &md_dst->dst); | |
3cf3227a AT |
3402 | skb->dev = macsec->real_dev; |
3403 | return dev_queue_xmit(skb); | |
3404 | } | |
3405 | ||
c09440f7 SD |
3406 | /* 10.5 */ |
3407 | if (!secy->protect_frames) { | |
3408 | secy_stats = this_cpu_ptr(macsec->stats); | |
3409 | u64_stats_update_begin(&secy_stats->syncp); | |
3410 | secy_stats->stats.OutPktsUntagged++; | |
3411 | u64_stats_update_end(&secy_stats->syncp); | |
79c62220 | 3412 | skb->dev = macsec->real_dev; |
c09440f7 SD |
3413 | len = skb->len; |
3414 | ret = dev_queue_xmit(skb); | |
3415 | count_tx(dev, ret, len); | |
3416 | return ret; | |
3417 | } | |
3418 | ||
3419 | if (!secy->operational) { | |
3420 | kfree_skb(skb); | |
3421 | dev->stats.tx_dropped++; | |
3422 | return NETDEV_TX_OK; | |
3423 | } | |
3424 | ||
91ec9bd5 | 3425 | len = skb->len; |
c09440f7 SD |
3426 | skb = macsec_encrypt(skb, dev); |
3427 | if (IS_ERR(skb)) { | |
3428 | if (PTR_ERR(skb) != -EINPROGRESS) | |
3429 | dev->stats.tx_dropped++; | |
3430 | return NETDEV_TX_OK; | |
3431 | } | |
3432 | ||
3433 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
3434 | ||
3435 | macsec_encrypt_finish(skb, dev); | |
c09440f7 SD |
3436 | ret = dev_queue_xmit(skb); |
3437 | count_tx(dev, ret, len); | |
3438 | return ret; | |
3439 | } | |
3440 | ||
8bcd560a | 3441 | #define MACSEC_FEATURES \ |
c09440f7 | 3442 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) |
e2003872 | 3443 | |
c09440f7 SD |
3444 | static int macsec_dev_init(struct net_device *dev) |
3445 | { | |
3446 | struct macsec_dev *macsec = macsec_priv(dev); | |
3447 | struct net_device *real_dev = macsec->real_dev; | |
5491e7c6 | 3448 | int err; |
c09440f7 SD |
3449 | |
3450 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
3451 | if (!dev->tstats) | |
3452 | return -ENOMEM; | |
3453 | ||
5491e7c6 PA |
3454 | err = gro_cells_init(&macsec->gro_cells, dev); |
3455 | if (err) { | |
3456 | free_percpu(dev->tstats); | |
3457 | return err; | |
3458 | } | |
3459 | ||
8bcd560a SD |
3460 | dev->features = real_dev->features & MACSEC_FEATURES; |
3461 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
c09440f7 SD |
3462 | |
3463 | dev->needed_headroom = real_dev->needed_headroom + | |
3464 | MACSEC_NEEDED_HEADROOM; | |
3465 | dev->needed_tailroom = real_dev->needed_tailroom + | |
3466 | MACSEC_NEEDED_TAILROOM; | |
3467 | ||
3468 | if (is_zero_ether_addr(dev->dev_addr)) | |
3469 | eth_hw_addr_inherit(dev, real_dev); | |
3470 | if (is_zero_ether_addr(dev->broadcast)) | |
3471 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
3472 | ||
196a888c | 3473 | /* Get macsec's reference to real_dev */ |
d62607c3 | 3474 | netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL); |
196a888c | 3475 | |
c09440f7 SD |
3476 | return 0; |
3477 | } | |
3478 | ||
3479 | static void macsec_dev_uninit(struct net_device *dev) | |
3480 | { | |
5491e7c6 PA |
3481 | struct macsec_dev *macsec = macsec_priv(dev); |
3482 | ||
3483 | gro_cells_destroy(&macsec->gro_cells); | |
c09440f7 SD |
3484 | free_percpu(dev->tstats); |
3485 | } | |
3486 | ||
3487 | static netdev_features_t macsec_fix_features(struct net_device *dev, | |
3488 | netdev_features_t features) | |
3489 | { | |
3490 | struct macsec_dev *macsec = macsec_priv(dev); | |
3491 | struct net_device *real_dev = macsec->real_dev; | |
3492 | ||
8bcd560a | 3493 | features &= (real_dev->features & MACSEC_FEATURES) | |
5491e7c6 PA |
3494 | NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; |
3495 | features |= NETIF_F_LLTX; | |
c09440f7 SD |
3496 | |
3497 | return features; | |
3498 | } | |
3499 | ||
3500 | static int macsec_dev_open(struct net_device *dev) | |
3501 | { | |
3502 | struct macsec_dev *macsec = macsec_priv(dev); | |
3503 | struct net_device *real_dev = macsec->real_dev; | |
3504 | int err; | |
3505 | ||
c09440f7 SD |
3506 | err = dev_uc_add(real_dev, dev->dev_addr); |
3507 | if (err < 0) | |
3508 | return err; | |
3509 | ||
3510 | if (dev->flags & IFF_ALLMULTI) { | |
3511 | err = dev_set_allmulti(real_dev, 1); | |
3512 | if (err < 0) | |
3513 | goto del_unicast; | |
3514 | } | |
3515 | ||
3516 | if (dev->flags & IFF_PROMISC) { | |
3517 | err = dev_set_promiscuity(real_dev, 1); | |
3518 | if (err < 0) | |
3519 | goto clear_allmulti; | |
3520 | } | |
3521 | ||
3cf3227a AT |
3522 | /* If h/w offloading is available, propagate to the device */ |
3523 | if (macsec_is_offloaded(macsec)) { | |
3524 | const struct macsec_ops *ops; | |
3525 | struct macsec_context ctx; | |
3526 | ||
3527 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3528 | if (!ops) { | |
3529 | err = -EOPNOTSUPP; | |
3530 | goto clear_allmulti; | |
3531 | } | |
3532 | ||
182879f8 | 3533 | ctx.secy = &macsec->secy; |
3cf3227a AT |
3534 | err = macsec_offload(ops->mdo_dev_open, &ctx); |
3535 | if (err) | |
3536 | goto clear_allmulti; | |
3537 | } | |
3538 | ||
c09440f7 SD |
3539 | if (netif_carrier_ok(real_dev)) |
3540 | netif_carrier_on(dev); | |
3541 | ||
3542 | return 0; | |
3543 | clear_allmulti: | |
3544 | if (dev->flags & IFF_ALLMULTI) | |
3545 | dev_set_allmulti(real_dev, -1); | |
3546 | del_unicast: | |
3547 | dev_uc_del(real_dev, dev->dev_addr); | |
3548 | netif_carrier_off(dev); | |
3549 | return err; | |
3550 | } | |
3551 | ||
3552 | static int macsec_dev_stop(struct net_device *dev) | |
3553 | { | |
3554 | struct macsec_dev *macsec = macsec_priv(dev); | |
3555 | struct net_device *real_dev = macsec->real_dev; | |
3556 | ||
3557 | netif_carrier_off(dev); | |
3558 | ||
3cf3227a AT |
3559 | /* If h/w offloading is available, propagate to the device */ |
3560 | if (macsec_is_offloaded(macsec)) { | |
3561 | const struct macsec_ops *ops; | |
3562 | struct macsec_context ctx; | |
3563 | ||
3564 | ops = macsec_get_ops(macsec, &ctx); | |
182879f8 DB |
3565 | if (ops) { |
3566 | ctx.secy = &macsec->secy; | |
3cf3227a | 3567 | macsec_offload(ops->mdo_dev_stop, &ctx); |
182879f8 | 3568 | } |
3cf3227a AT |
3569 | } |
3570 | ||
c09440f7 SD |
3571 | dev_mc_unsync(real_dev, dev); |
3572 | dev_uc_unsync(real_dev, dev); | |
3573 | ||
3574 | if (dev->flags & IFF_ALLMULTI) | |
3575 | dev_set_allmulti(real_dev, -1); | |
3576 | ||
3577 | if (dev->flags & IFF_PROMISC) | |
3578 | dev_set_promiscuity(real_dev, -1); | |
3579 | ||
3580 | dev_uc_del(real_dev, dev->dev_addr); | |
3581 | ||
3582 | return 0; | |
3583 | } | |
3584 | ||
3585 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) | |
3586 | { | |
3587 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3588 | ||
3589 | if (!(dev->flags & IFF_UP)) | |
3590 | return; | |
3591 | ||
3592 | if (change & IFF_ALLMULTI) | |
3593 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3594 | ||
3595 | if (change & IFF_PROMISC) | |
3596 | dev_set_promiscuity(real_dev, | |
3597 | dev->flags & IFF_PROMISC ? 1 : -1); | |
3598 | } | |
3599 | ||
3600 | static void macsec_dev_set_rx_mode(struct net_device *dev) | |
3601 | { | |
3602 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3603 | ||
3604 | dev_mc_sync(real_dev, dev); | |
3605 | dev_uc_sync(real_dev, dev); | |
3606 | } | |
3607 | ||
3608 | static int macsec_set_mac_address(struct net_device *dev, void *p) | |
3609 | { | |
3610 | struct macsec_dev *macsec = macsec_priv(dev); | |
3611 | struct net_device *real_dev = macsec->real_dev; | |
3612 | struct sockaddr *addr = p; | |
3613 | int err; | |
3614 | ||
3615 | if (!is_valid_ether_addr(addr->sa_data)) | |
3616 | return -EADDRNOTAVAIL; | |
3617 | ||
3618 | if (!(dev->flags & IFF_UP)) | |
3619 | goto out; | |
3620 | ||
3621 | err = dev_uc_add(real_dev, addr->sa_data); | |
3622 | if (err < 0) | |
3623 | return err; | |
3624 | ||
3625 | dev_uc_del(real_dev, dev->dev_addr); | |
3626 | ||
3627 | out: | |
e35b8d7d | 3628 | eth_hw_addr_set(dev, addr->sa_data); |
09f4136c DB |
3629 | |
3630 | /* If h/w offloading is available, propagate to the device */ | |
3631 | if (macsec_is_offloaded(macsec)) { | |
3632 | const struct macsec_ops *ops; | |
3633 | struct macsec_context ctx; | |
3634 | ||
3635 | ops = macsec_get_ops(macsec, &ctx); | |
3636 | if (ops) { | |
3637 | ctx.secy = &macsec->secy; | |
3638 | macsec_offload(ops->mdo_upd_secy, &ctx); | |
3639 | } | |
3640 | } | |
3641 | ||
c09440f7 SD |
3642 | return 0; |
3643 | } | |
3644 | ||
3645 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) | |
3646 | { | |
3647 | struct macsec_dev *macsec = macsec_priv(dev); | |
3648 | unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); | |
3649 | ||
3650 | if (macsec->real_dev->mtu - extra < new_mtu) | |
3651 | return -ERANGE; | |
3652 | ||
3653 | dev->mtu = new_mtu; | |
3654 | ||
3655 | return 0; | |
3656 | } | |
3657 | ||
bc1f4470 | 3658 | static void macsec_get_stats64(struct net_device *dev, |
3659 | struct rtnl_link_stats64 *s) | |
c09440f7 | 3660 | { |
c09440f7 | 3661 | if (!dev->tstats) |
bc1f4470 | 3662 | return; |
c09440f7 | 3663 | |
9d015167 | 3664 | dev_fetch_sw_netstats(s, dev->tstats); |
c09440f7 SD |
3665 | |
3666 | s->rx_dropped = dev->stats.rx_dropped; | |
3667 | s->tx_dropped = dev->stats.tx_dropped; | |
91ec9bd5 | 3668 | s->rx_errors = dev->stats.rx_errors; |
c09440f7 SD |
3669 | } |
3670 | ||
3671 | static int macsec_get_iflink(const struct net_device *dev) | |
3672 | { | |
3673 | return macsec_priv(dev)->real_dev->ifindex; | |
3674 | } | |
3675 | ||
3676 | static const struct net_device_ops macsec_netdev_ops = { | |
3677 | .ndo_init = macsec_dev_init, | |
3678 | .ndo_uninit = macsec_dev_uninit, | |
3679 | .ndo_open = macsec_dev_open, | |
3680 | .ndo_stop = macsec_dev_stop, | |
3681 | .ndo_fix_features = macsec_fix_features, | |
3682 | .ndo_change_mtu = macsec_change_mtu, | |
3683 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, | |
3684 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, | |
3685 | .ndo_set_mac_address = macsec_set_mac_address, | |
3686 | .ndo_start_xmit = macsec_start_xmit, | |
3687 | .ndo_get_stats64 = macsec_get_stats64, | |
3688 | .ndo_get_iflink = macsec_get_iflink, | |
3689 | }; | |
3690 | ||
3691 | static const struct device_type macsec_type = { | |
3692 | .name = "macsec", | |
3693 | }; | |
3694 | ||
3695 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { | |
3696 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, | |
31d9a1c5 | 3697 | [IFLA_MACSEC_PORT] = { .type = NLA_U16 }, |
c09440f7 SD |
3698 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, |
3699 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, | |
3700 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, | |
3701 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, | |
3702 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, | |
3703 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, | |
3704 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, | |
3705 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, | |
3706 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, | |
3707 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, | |
3708 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, | |
38099024 | 3709 | [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 }, |
c09440f7 SD |
3710 | }; |
3711 | ||
3712 | static void macsec_free_netdev(struct net_device *dev) | |
3713 | { | |
3714 | struct macsec_dev *macsec = macsec_priv(dev); | |
c09440f7 | 3715 | |
c52add61 SD |
3716 | if (macsec->secy.tx_sc.md_dst) |
3717 | metadata_dst_free(macsec->secy.tx_sc.md_dst); | |
c09440f7 SD |
3718 | free_percpu(macsec->stats); |
3719 | free_percpu(macsec->secy.tx_sc.stats); | |
3720 | ||
196a888c | 3721 | /* Get rid of the macsec's reference to real_dev */ |
d62607c3 | 3722 | netdev_put(macsec->real_dev, &macsec->dev_tracker); |
c09440f7 SD |
3723 | } |
3724 | ||
3725 | static void macsec_setup(struct net_device *dev) | |
3726 | { | |
3727 | ether_setup(dev); | |
91572088 JW |
3728 | dev->min_mtu = 0; |
3729 | dev->max_mtu = ETH_MAX_MTU; | |
e425974f | 3730 | dev->priv_flags |= IFF_NO_QUEUE; |
c09440f7 | 3731 | dev->netdev_ops = &macsec_netdev_ops; |
cf124db5 DM |
3732 | dev->needs_free_netdev = true; |
3733 | dev->priv_destructor = macsec_free_netdev; | |
c24acf03 | 3734 | SET_NETDEV_DEVTYPE(dev, &macsec_type); |
c09440f7 SD |
3735 | |
3736 | eth_zero_addr(dev->broadcast); | |
3737 | } | |
3738 | ||
ccfdec90 FW |
3739 | static int macsec_changelink_common(struct net_device *dev, |
3740 | struct nlattr *data[]) | |
c09440f7 SD |
3741 | { |
3742 | struct macsec_secy *secy; | |
3743 | struct macsec_tx_sc *tx_sc; | |
3744 | ||
3745 | secy = &macsec_priv(dev)->secy; | |
3746 | tx_sc = &secy->tx_sc; | |
3747 | ||
3748 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3749 | struct macsec_tx_sa *tx_sa; | |
3750 | ||
3751 | tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); | |
3752 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); | |
3753 | ||
3754 | secy->operational = tx_sa && tx_sa->active; | |
3755 | } | |
3756 | ||
c09440f7 SD |
3757 | if (data[IFLA_MACSEC_ENCRYPT]) |
3758 | tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); | |
3759 | ||
3760 | if (data[IFLA_MACSEC_PROTECT]) | |
3761 | secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); | |
3762 | ||
3763 | if (data[IFLA_MACSEC_INC_SCI]) | |
3764 | tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
3765 | ||
3766 | if (data[IFLA_MACSEC_ES]) | |
3767 | tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); | |
3768 | ||
3769 | if (data[IFLA_MACSEC_SCB]) | |
3770 | tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); | |
3771 | ||
3772 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) | |
3773 | secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); | |
3774 | ||
3775 | if (data[IFLA_MACSEC_VALIDATION]) | |
3776 | secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); | |
ccfdec90 FW |
3777 | |
3778 | if (data[IFLA_MACSEC_CIPHER_SUITE]) { | |
3779 | switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) { | |
3780 | case MACSEC_CIPHER_ID_GCM_AES_128: | |
e8660ded | 3781 | case MACSEC_DEFAULT_CIPHER_ID: |
ccfdec90 | 3782 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
48ef50fa | 3783 | secy->xpn = false; |
ccfdec90 FW |
3784 | break; |
3785 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
3786 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
48ef50fa EM |
3787 | secy->xpn = false; |
3788 | break; | |
3789 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: | |
3790 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; | |
3791 | secy->xpn = true; | |
3792 | break; | |
3793 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: | |
3794 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
3795 | secy->xpn = true; | |
ccfdec90 FW |
3796 | break; |
3797 | default: | |
3798 | return -EINVAL; | |
3799 | } | |
3800 | } | |
3801 | ||
b07a0e20 SD |
3802 | if (data[IFLA_MACSEC_WINDOW]) { |
3803 | secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); | |
3804 | ||
3805 | /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window | |
3806 | * for XPN cipher suites */ | |
3807 | if (secy->xpn && | |
3808 | secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW) | |
3809 | return -EINVAL; | |
3810 | } | |
3811 | ||
ccfdec90 | 3812 | return 0; |
c09440f7 SD |
3813 | } |
3814 | ||
3815 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
3816 | struct nlattr *data[], |
3817 | struct netlink_ext_ack *extack) | |
c09440f7 | 3818 | { |
3cf3227a | 3819 | struct macsec_dev *macsec = macsec_priv(dev); |
022e9d60 | 3820 | struct macsec_tx_sc tx_sc; |
3cf3227a AT |
3821 | struct macsec_secy secy; |
3822 | int ret; | |
3823 | ||
c09440f7 SD |
3824 | if (!data) |
3825 | return 0; | |
3826 | ||
3827 | if (data[IFLA_MACSEC_CIPHER_SUITE] || | |
3828 | data[IFLA_MACSEC_ICV_LEN] || | |
3829 | data[IFLA_MACSEC_SCI] || | |
3830 | data[IFLA_MACSEC_PORT]) | |
3831 | return -EINVAL; | |
3832 | ||
3cf3227a AT |
3833 | /* Keep a copy of unmodified secy and tx_sc, in case the offload |
3834 | * propagation fails, to revert macsec_changelink_common. | |
3835 | */ | |
3836 | memcpy(&secy, &macsec->secy, sizeof(secy)); | |
3837 | memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc)); | |
3838 | ||
3839 | ret = macsec_changelink_common(dev, data); | |
3840 | if (ret) | |
b07a0e20 | 3841 | goto cleanup; |
3cf3227a AT |
3842 | |
3843 | /* If h/w offloading is available, propagate to the device */ | |
3844 | if (macsec_is_offloaded(macsec)) { | |
3845 | const struct macsec_ops *ops; | |
3846 | struct macsec_context ctx; | |
3cf3227a AT |
3847 | |
3848 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3849 | if (!ops) { | |
3850 | ret = -EOPNOTSUPP; | |
3851 | goto cleanup; | |
3852 | } | |
3853 | ||
3854 | ctx.secy = &macsec->secy; | |
3855 | ret = macsec_offload(ops->mdo_upd_secy, &ctx); | |
3856 | if (ret) | |
3857 | goto cleanup; | |
3858 | } | |
3859 | ||
3860 | return 0; | |
3861 | ||
3862 | cleanup: | |
3863 | memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc)); | |
3864 | memcpy(&macsec->secy, &secy, sizeof(secy)); | |
3865 | ||
3866 | return ret; | |
c09440f7 SD |
3867 | } |
3868 | ||
3869 | static void macsec_del_dev(struct macsec_dev *macsec) | |
3870 | { | |
3871 | int i; | |
3872 | ||
3873 | while (macsec->secy.rx_sc) { | |
3874 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); | |
3875 | ||
3876 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); | |
3877 | free_rx_sc(rx_sc); | |
3878 | } | |
3879 | ||
3880 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
3881 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); | |
3882 | ||
3883 | if (sa) { | |
3884 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); | |
3885 | clear_tx_sa(sa); | |
3886 | } | |
3887 | } | |
3888 | } | |
3889 | ||
bbe11fab SD |
3890 | static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
3891 | { | |
3892 | struct macsec_dev *macsec = macsec_priv(dev); | |
e2003872 | 3893 | struct net_device *real_dev = macsec->real_dev; |
bbe11fab | 3894 | |
9cef24c8 LN |
3895 | /* If h/w offloading is available, propagate to the device */ |
3896 | if (macsec_is_offloaded(macsec)) { | |
3897 | const struct macsec_ops *ops; | |
3898 | struct macsec_context ctx; | |
3899 | ||
3900 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3901 | if (ops) { | |
3902 | ctx.secy = &macsec->secy; | |
3903 | macsec_offload(ops->mdo_del_secy, &ctx); | |
3904 | } | |
3905 | } | |
3906 | ||
bbe11fab SD |
3907 | unregister_netdevice_queue(dev, head); |
3908 | list_del_rcu(&macsec->secys); | |
3909 | macsec_del_dev(macsec); | |
e2003872 | 3910 | netdev_upper_dev_unlink(real_dev, dev); |
bbe11fab SD |
3911 | |
3912 | macsec_generation++; | |
3913 | } | |
3914 | ||
c09440f7 SD |
3915 | static void macsec_dellink(struct net_device *dev, struct list_head *head) |
3916 | { | |
3917 | struct macsec_dev *macsec = macsec_priv(dev); | |
3918 | struct net_device *real_dev = macsec->real_dev; | |
3919 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3920 | ||
bbe11fab | 3921 | macsec_common_dellink(dev, head); |
96cfc505 | 3922 | |
960d5848 | 3923 | if (list_empty(&rxd->secys)) { |
c09440f7 | 3924 | netdev_rx_handler_unregister(real_dev); |
960d5848 SD |
3925 | kfree(rxd); |
3926 | } | |
c09440f7 SD |
3927 | } |
3928 | ||
3929 | static int register_macsec_dev(struct net_device *real_dev, | |
3930 | struct net_device *dev) | |
3931 | { | |
3932 | struct macsec_dev *macsec = macsec_priv(dev); | |
3933 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3934 | ||
3935 | if (!rxd) { | |
3936 | int err; | |
3937 | ||
3938 | rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); | |
3939 | if (!rxd) | |
3940 | return -ENOMEM; | |
3941 | ||
3942 | INIT_LIST_HEAD(&rxd->secys); | |
3943 | ||
3944 | err = netdev_rx_handler_register(real_dev, macsec_handle_frame, | |
3945 | rxd); | |
960d5848 SD |
3946 | if (err < 0) { |
3947 | kfree(rxd); | |
c09440f7 | 3948 | return err; |
960d5848 | 3949 | } |
c09440f7 SD |
3950 | } |
3951 | ||
3952 | list_add_tail_rcu(&macsec->secys, &rxd->secys); | |
3953 | return 0; | |
3954 | } | |
3955 | ||
3956 | static bool sci_exists(struct net_device *dev, sci_t sci) | |
3957 | { | |
3958 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); | |
3959 | struct macsec_dev *macsec; | |
3960 | ||
3961 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
3962 | if (macsec->secy.sci == sci) | |
3963 | return true; | |
3964 | } | |
3965 | ||
3966 | return false; | |
3967 | } | |
3968 | ||
e82c649e SD |
3969 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) |
3970 | { | |
3971 | return make_sci(dev->dev_addr, port); | |
3972 | } | |
3973 | ||
c09440f7 SD |
3974 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) |
3975 | { | |
3976 | struct macsec_dev *macsec = macsec_priv(dev); | |
3977 | struct macsec_secy *secy = &macsec->secy; | |
3978 | ||
3979 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); | |
3980 | if (!macsec->stats) | |
3981 | return -ENOMEM; | |
3982 | ||
3983 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); | |
3984 | if (!secy->tx_sc.stats) { | |
3985 | free_percpu(macsec->stats); | |
3986 | return -ENOMEM; | |
3987 | } | |
3988 | ||
0a28bfd4 LN |
3989 | secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL); |
3990 | if (!secy->tx_sc.md_dst) { | |
3991 | free_percpu(secy->tx_sc.stats); | |
3992 | free_percpu(macsec->stats); | |
3993 | return -ENOMEM; | |
3994 | } | |
3995 | ||
c09440f7 SD |
3996 | if (sci == MACSEC_UNDEF_SCI) |
3997 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
3998 | ||
3999 | secy->netdev = dev; | |
4000 | secy->operational = true; | |
4001 | secy->key_len = DEFAULT_SAK_LEN; | |
4002 | secy->icv_len = icv_len; | |
4003 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; | |
4004 | secy->protect_frames = true; | |
4005 | secy->replay_protect = false; | |
48ef50fa | 4006 | secy->xpn = DEFAULT_XPN; |
c09440f7 SD |
4007 | |
4008 | secy->sci = sci; | |
0a28bfd4 | 4009 | secy->tx_sc.md_dst->u.macsec_info.sci = sci; |
c09440f7 SD |
4010 | secy->tx_sc.active = true; |
4011 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; | |
4012 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; | |
4013 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; | |
4014 | secy->tx_sc.end_station = false; | |
4015 | secy->tx_sc.scb = false; | |
4016 | ||
4017 | return 0; | |
4018 | } | |
4019 | ||
845e0ebb CW |
4020 | static struct lock_class_key macsec_netdev_addr_lock_key; |
4021 | ||
c09440f7 | 4022 | static int macsec_newlink(struct net *net, struct net_device *dev, |
7a3f4a18 MS |
4023 | struct nlattr *tb[], struct nlattr *data[], |
4024 | struct netlink_ext_ack *extack) | |
c09440f7 SD |
4025 | { |
4026 | struct macsec_dev *macsec = macsec_priv(dev); | |
7f327080 | 4027 | rx_handler_func_t *rx_handler; |
b1671253 | 4028 | u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
c09440f7 | 4029 | struct net_device *real_dev; |
7f327080 | 4030 | int err, mtu; |
c09440f7 | 4031 | sci_t sci; |
c09440f7 SD |
4032 | |
4033 | if (!tb[IFLA_LINK]) | |
4034 | return -EINVAL; | |
4035 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
4036 | if (!real_dev) | |
4037 | return -ENODEV; | |
b06d072c WB |
4038 | if (real_dev->type != ARPHRD_ETHER) |
4039 | return -EINVAL; | |
c09440f7 SD |
4040 | |
4041 | dev->priv_flags |= IFF_MACSEC; | |
4042 | ||
4043 | macsec->real_dev = real_dev; | |
4044 | ||
791bb3fc MS |
4045 | if (data && data[IFLA_MACSEC_OFFLOAD]) |
4046 | macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]); | |
4047 | else | |
4048 | /* MACsec offloading is off by default */ | |
4049 | macsec->offload = MACSEC_OFFLOAD_OFF; | |
4050 | ||
4051 | /* Check if the offloading mode is supported by the underlying layers */ | |
4052 | if (macsec->offload != MACSEC_OFFLOAD_OFF && | |
4053 | !macsec_check_offload(macsec->offload, macsec)) | |
4054 | return -EOPNOTSUPP; | |
3cf3227a | 4055 | |
d0cfa548 LN |
4056 | /* send_sci must be set to true when transmit sci explicitly is set */ |
4057 | if ((data && data[IFLA_MACSEC_SCI]) && | |
4058 | (data && data[IFLA_MACSEC_INC_SCI])) { | |
4059 | u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
4060 | ||
4061 | if (!send_sci) | |
4062 | return -EINVAL; | |
4063 | } | |
4064 | ||
c09440f7 SD |
4065 | if (data && data[IFLA_MACSEC_ICV_LEN]) |
4066 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
7f327080 TY |
4067 | mtu = real_dev->mtu - icv_len - macsec_extra_len(true); |
4068 | if (mtu < 0) | |
4069 | dev->mtu = 0; | |
4070 | else | |
4071 | dev->mtu = mtu; | |
c09440f7 SD |
4072 | |
4073 | rx_handler = rtnl_dereference(real_dev->rx_handler); | |
4074 | if (rx_handler && rx_handler != macsec_handle_frame) | |
4075 | return -EBUSY; | |
4076 | ||
4077 | err = register_netdevice(dev); | |
4078 | if (err < 0) | |
4079 | return err; | |
4080 | ||
1a33e10e | 4081 | netdev_lockdep_set_classes(dev); |
be74294f CW |
4082 | lockdep_set_class(&dev->addr_list_lock, |
4083 | &macsec_netdev_addr_lock_key); | |
1a33e10e | 4084 | |
42ab19ee | 4085 | err = netdev_upper_dev_link(real_dev, dev, extack); |
e2003872 | 4086 | if (err < 0) |
bd28899d | 4087 | goto unregister; |
e2003872 | 4088 | |
c09440f7 SD |
4089 | /* need to be already registered so that ->init has run and |
4090 | * the MAC addr is set | |
4091 | */ | |
4092 | if (data && data[IFLA_MACSEC_SCI]) | |
4093 | sci = nla_get_sci(data[IFLA_MACSEC_SCI]); | |
4094 | else if (data && data[IFLA_MACSEC_PORT]) | |
4095 | sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); | |
4096 | else | |
4097 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
4098 | ||
4099 | if (rx_handler && sci_exists(real_dev, sci)) { | |
4100 | err = -EBUSY; | |
e2003872 | 4101 | goto unlink; |
c09440f7 SD |
4102 | } |
4103 | ||
4104 | err = macsec_add_dev(dev, sci, icv_len); | |
4105 | if (err) | |
e2003872 | 4106 | goto unlink; |
c09440f7 | 4107 | |
ccfdec90 FW |
4108 | if (data) { |
4109 | err = macsec_changelink_common(dev, data); | |
4110 | if (err) | |
4111 | goto del_dev; | |
4112 | } | |
c09440f7 | 4113 | |
791bb3fc MS |
4114 | /* If h/w offloading is available, propagate to the device */ |
4115 | if (macsec_is_offloaded(macsec)) { | |
4116 | const struct macsec_ops *ops; | |
4117 | struct macsec_context ctx; | |
4118 | ||
4119 | ops = macsec_get_ops(macsec, &ctx); | |
4120 | if (ops) { | |
4121 | ctx.secy = &macsec->secy; | |
4122 | err = macsec_offload(ops->mdo_add_secy, &ctx); | |
4123 | if (err) | |
4124 | goto del_dev; | |
4125 | } | |
4126 | } | |
4127 | ||
c09440f7 SD |
4128 | err = register_macsec_dev(real_dev, dev); |
4129 | if (err < 0) | |
4130 | goto del_dev; | |
4131 | ||
e6ac0758 SD |
4132 | netif_stacked_transfer_operstate(real_dev, dev); |
4133 | linkwatch_fire_event(dev); | |
4134 | ||
96cfc505 SD |
4135 | macsec_generation++; |
4136 | ||
c09440f7 SD |
4137 | return 0; |
4138 | ||
4139 | del_dev: | |
4140 | macsec_del_dev(macsec); | |
e2003872 SD |
4141 | unlink: |
4142 | netdev_upper_dev_unlink(real_dev, dev); | |
bd28899d | 4143 | unregister: |
c09440f7 SD |
4144 | unregister_netdevice(dev); |
4145 | return err; | |
4146 | } | |
4147 | ||
a8b8a889 MS |
4148 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[], |
4149 | struct netlink_ext_ack *extack) | |
c09440f7 | 4150 | { |
74816480 | 4151 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
b1671253 | 4152 | u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
c09440f7 SD |
4153 | int flag; |
4154 | bool es, scb, sci; | |
4155 | ||
4156 | if (!data) | |
4157 | return 0; | |
4158 | ||
4159 | if (data[IFLA_MACSEC_CIPHER_SUITE]) | |
4160 | csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); | |
4161 | ||
f04c392d | 4162 | if (data[IFLA_MACSEC_ICV_LEN]) { |
c09440f7 | 4163 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
b1671253 | 4164 | if (icv_len != MACSEC_DEFAULT_ICV_LEN) { |
f04c392d DC |
4165 | char dummy_key[DEFAULT_SAK_LEN] = { 0 }; |
4166 | struct crypto_aead *dummy_tfm; | |
4167 | ||
4168 | dummy_tfm = macsec_alloc_tfm(dummy_key, | |
4169 | DEFAULT_SAK_LEN, | |
4170 | icv_len); | |
4171 | if (IS_ERR(dummy_tfm)) | |
4172 | return PTR_ERR(dummy_tfm); | |
4173 | crypto_free_aead(dummy_tfm); | |
4174 | } | |
4175 | } | |
c09440f7 SD |
4176 | |
4177 | switch (csid) { | |
ccfdec90 FW |
4178 | case MACSEC_CIPHER_ID_GCM_AES_128: |
4179 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
48ef50fa EM |
4180 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: |
4181 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: | |
e8660ded | 4182 | case MACSEC_DEFAULT_CIPHER_ID: |
c09440f7 | 4183 | if (icv_len < MACSEC_MIN_ICV_LEN || |
2ccbe2cb | 4184 | icv_len > MACSEC_STD_ICV_LEN) |
c09440f7 SD |
4185 | return -EINVAL; |
4186 | break; | |
4187 | default: | |
4188 | return -EINVAL; | |
4189 | } | |
4190 | ||
4191 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
4192 | if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) | |
4193 | return -EINVAL; | |
4194 | } | |
4195 | ||
4196 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; | |
4197 | flag < IFLA_MACSEC_VALIDATION; | |
4198 | flag++) { | |
4199 | if (data[flag]) { | |
4200 | if (nla_get_u8(data[flag]) > 1) | |
4201 | return -EINVAL; | |
4202 | } | |
4203 | } | |
4204 | ||
4205 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; | |
4206 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; | |
4207 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; | |
4208 | ||
4209 | if ((sci && (scb || es)) || (scb && es)) | |
4210 | return -EINVAL; | |
4211 | ||
4212 | if (data[IFLA_MACSEC_VALIDATION] && | |
4213 | nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) | |
4214 | return -EINVAL; | |
4215 | ||
4b1fb935 SD |
4216 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
4217 | nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && | |
c09440f7 SD |
4218 | !data[IFLA_MACSEC_WINDOW]) |
4219 | return -EINVAL; | |
4220 | ||
4221 | return 0; | |
4222 | } | |
4223 | ||
4224 | static struct net *macsec_get_link_net(const struct net_device *dev) | |
4225 | { | |
4226 | return dev_net(macsec_priv(dev)->real_dev); | |
4227 | } | |
4228 | ||
4229 | static size_t macsec_get_size(const struct net_device *dev) | |
4230 | { | |
c9fba3ed ZS |
4231 | return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */ |
4232 | nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */ | |
4233 | nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */ | |
4234 | nla_total_size(4) + /* IFLA_MACSEC_WINDOW */ | |
4235 | nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */ | |
4236 | nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */ | |
4237 | nla_total_size(1) + /* IFLA_MACSEC_PROTECT */ | |
4238 | nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */ | |
4239 | nla_total_size(1) + /* IFLA_MACSEC_ES */ | |
4240 | nla_total_size(1) + /* IFLA_MACSEC_SCB */ | |
4241 | nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */ | |
4242 | nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */ | |
c09440f7 SD |
4243 | 0; |
4244 | } | |
4245 | ||
4246 | static int macsec_fill_info(struct sk_buff *skb, | |
4247 | const struct net_device *dev) | |
4248 | { | |
4249 | struct macsec_secy *secy = &macsec_priv(dev)->secy; | |
4250 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ccfdec90 FW |
4251 | u64 csid; |
4252 | ||
4253 | switch (secy->key_len) { | |
4254 | case MACSEC_GCM_AES_128_SAK_LEN: | |
48ef50fa | 4255 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
4256 | break; |
4257 | case MACSEC_GCM_AES_256_SAK_LEN: | |
48ef50fa | 4258 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
ccfdec90 FW |
4259 | break; |
4260 | default: | |
4261 | goto nla_put_failure; | |
4262 | } | |
c09440f7 | 4263 | |
f60d94c0 ND |
4264 | if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
4265 | IFLA_MACSEC_PAD) || | |
c09440f7 | 4266 | nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
f60d94c0 | 4267 | nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
ccfdec90 | 4268 | csid, IFLA_MACSEC_PAD) || |
c09440f7 SD |
4269 | nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
4270 | nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || | |
4271 | nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || | |
4272 | nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || | |
4273 | nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || | |
4274 | nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || | |
4275 | nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || | |
4276 | nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || | |
4277 | 0) | |
4278 | goto nla_put_failure; | |
4279 | ||
4280 | if (secy->replay_protect) { | |
4281 | if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) | |
4282 | goto nla_put_failure; | |
4283 | } | |
4284 | ||
4285 | return 0; | |
4286 | ||
4287 | nla_put_failure: | |
4288 | return -EMSGSIZE; | |
4289 | } | |
4290 | ||
4291 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { | |
4292 | .kind = "macsec", | |
4293 | .priv_size = sizeof(struct macsec_dev), | |
4294 | .maxtype = IFLA_MACSEC_MAX, | |
4295 | .policy = macsec_rtnl_policy, | |
4296 | .setup = macsec_setup, | |
4297 | .validate = macsec_validate_attr, | |
4298 | .newlink = macsec_newlink, | |
4299 | .changelink = macsec_changelink, | |
4300 | .dellink = macsec_dellink, | |
4301 | .get_size = macsec_get_size, | |
4302 | .fill_info = macsec_fill_info, | |
4303 | .get_link_net = macsec_get_link_net, | |
4304 | }; | |
4305 | ||
4306 | static bool is_macsec_master(struct net_device *dev) | |
4307 | { | |
4308 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; | |
4309 | } | |
4310 | ||
4311 | static int macsec_notify(struct notifier_block *this, unsigned long event, | |
4312 | void *ptr) | |
4313 | { | |
4314 | struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); | |
4315 | LIST_HEAD(head); | |
4316 | ||
4317 | if (!is_macsec_master(real_dev)) | |
4318 | return NOTIFY_DONE; | |
4319 | ||
4320 | switch (event) { | |
e6ac0758 SD |
4321 | case NETDEV_DOWN: |
4322 | case NETDEV_UP: | |
4323 | case NETDEV_CHANGE: { | |
4324 | struct macsec_dev *m, *n; | |
4325 | struct macsec_rxh_data *rxd; | |
4326 | ||
4327 | rxd = macsec_data_rtnl(real_dev); | |
4328 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
4329 | struct net_device *dev = m->secy.netdev; | |
4330 | ||
4331 | netif_stacked_transfer_operstate(real_dev, dev); | |
4332 | } | |
4333 | break; | |
4334 | } | |
c09440f7 SD |
4335 | case NETDEV_UNREGISTER: { |
4336 | struct macsec_dev *m, *n; | |
4337 | struct macsec_rxh_data *rxd; | |
4338 | ||
4339 | rxd = macsec_data_rtnl(real_dev); | |
4340 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
bbe11fab | 4341 | macsec_common_dellink(m->secy.netdev, &head); |
c09440f7 | 4342 | } |
bbe11fab SD |
4343 | |
4344 | netdev_rx_handler_unregister(real_dev); | |
4345 | kfree(rxd); | |
4346 | ||
c09440f7 SD |
4347 | unregister_netdevice_many(&head); |
4348 | break; | |
4349 | } | |
4350 | case NETDEV_CHANGEMTU: { | |
4351 | struct macsec_dev *m; | |
4352 | struct macsec_rxh_data *rxd; | |
4353 | ||
4354 | rxd = macsec_data_rtnl(real_dev); | |
4355 | list_for_each_entry(m, &rxd->secys, secys) { | |
4356 | struct net_device *dev = m->secy.netdev; | |
4357 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + | |
4358 | macsec_extra_len(true)); | |
4359 | ||
4360 | if (dev->mtu > mtu) | |
4361 | dev_set_mtu(dev, mtu); | |
4362 | } | |
4363 | } | |
4364 | } | |
4365 | ||
4366 | return NOTIFY_OK; | |
4367 | } | |
4368 | ||
4369 | static struct notifier_block macsec_notifier = { | |
4370 | .notifier_call = macsec_notify, | |
4371 | }; | |
4372 | ||
4373 | static int __init macsec_init(void) | |
4374 | { | |
4375 | int err; | |
4376 | ||
4377 | pr_info("MACsec IEEE 802.1AE\n"); | |
4378 | err = register_netdevice_notifier(&macsec_notifier); | |
4379 | if (err) | |
4380 | return err; | |
4381 | ||
4382 | err = rtnl_link_register(&macsec_link_ops); | |
4383 | if (err) | |
4384 | goto notifier; | |
4385 | ||
489111e5 | 4386 | err = genl_register_family(&macsec_fam); |
c09440f7 SD |
4387 | if (err) |
4388 | goto rtnl; | |
4389 | ||
4390 | return 0; | |
4391 | ||
4392 | rtnl: | |
4393 | rtnl_link_unregister(&macsec_link_ops); | |
4394 | notifier: | |
4395 | unregister_netdevice_notifier(&macsec_notifier); | |
4396 | return err; | |
4397 | } | |
4398 | ||
4399 | static void __exit macsec_exit(void) | |
4400 | { | |
4401 | genl_unregister_family(&macsec_fam); | |
4402 | rtnl_link_unregister(&macsec_link_ops); | |
4403 | unregister_netdevice_notifier(&macsec_notifier); | |
b196c22a | 4404 | rcu_barrier(); |
c09440f7 SD |
4405 | } |
4406 | ||
4407 | module_init(macsec_init); | |
4408 | module_exit(macsec_exit); | |
4409 | ||
4410 | MODULE_ALIAS_RTNL_LINK("macsec"); | |
78362998 | 4411 | MODULE_ALIAS_GENL_FAMILY("macsec"); |
c09440f7 SD |
4412 | |
4413 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); | |
4414 | MODULE_LICENSE("GPL v2"); |