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 | { | |
bf98bbe9 LZ |
521 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) |
522 | dev_sw_netstats_tx_add(dev, 1, len); | |
c09440f7 SD |
523 | } |
524 | ||
23b8b93b | 525 | static void macsec_encrypt_done(void *data, int err) |
c09440f7 | 526 | { |
23b8b93b | 527 | struct sk_buff *skb = data; |
c09440f7 SD |
528 | struct net_device *dev = skb->dev; |
529 | struct macsec_dev *macsec = macsec_priv(dev); | |
530 | struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; | |
531 | int len, ret; | |
532 | ||
533 | aead_request_free(macsec_skb_cb(skb)->req); | |
534 | ||
535 | rcu_read_lock_bh(); | |
c09440f7 | 536 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); |
91ec9bd5 CY |
537 | /* packet is encrypted/protected so tx_bytes must be calculated */ |
538 | len = macsec_msdu_len(skb) + 2 * ETH_ALEN; | |
539 | macsec_encrypt_finish(skb, dev); | |
c09440f7 SD |
540 | ret = dev_queue_xmit(skb); |
541 | count_tx(dev, ret, len); | |
542 | rcu_read_unlock_bh(); | |
543 | ||
544 | macsec_txsa_put(sa); | |
545 | dev_put(dev); | |
546 | } | |
547 | ||
5d9649b3 SD |
548 | static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
549 | unsigned char **iv, | |
5294b830 JD |
550 | struct scatterlist **sg, |
551 | int num_frags) | |
5d9649b3 SD |
552 | { |
553 | size_t size, iv_offset, sg_offset; | |
554 | struct aead_request *req; | |
555 | void *tmp; | |
556 | ||
557 | size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); | |
558 | iv_offset = size; | |
559 | size += GCM_AES_IV_LEN; | |
560 | ||
561 | size = ALIGN(size, __alignof__(struct scatterlist)); | |
562 | sg_offset = size; | |
5294b830 | 563 | size += sizeof(struct scatterlist) * num_frags; |
5d9649b3 SD |
564 | |
565 | tmp = kmalloc(size, GFP_ATOMIC); | |
566 | if (!tmp) | |
567 | return NULL; | |
568 | ||
569 | *iv = (unsigned char *)(tmp + iv_offset); | |
570 | *sg = (struct scatterlist *)(tmp + sg_offset); | |
571 | req = tmp; | |
572 | ||
573 | aead_request_set_tfm(req, tfm); | |
574 | ||
575 | return req; | |
576 | } | |
577 | ||
c09440f7 SD |
578 | static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
579 | struct net_device *dev) | |
580 | { | |
581 | int ret; | |
5d9649b3 | 582 | struct scatterlist *sg; |
5294b830 | 583 | struct sk_buff *trailer; |
5d9649b3 | 584 | unsigned char *iv; |
c09440f7 SD |
585 | struct ethhdr *eth; |
586 | struct macsec_eth_header *hh; | |
587 | size_t unprotected_len; | |
588 | struct aead_request *req; | |
589 | struct macsec_secy *secy; | |
590 | struct macsec_tx_sc *tx_sc; | |
591 | struct macsec_tx_sa *tx_sa; | |
592 | struct macsec_dev *macsec = macsec_priv(dev); | |
e0f841f5 | 593 | bool sci_present; |
a21ecf0e | 594 | pn_t pn; |
c09440f7 SD |
595 | |
596 | secy = &macsec->secy; | |
597 | tx_sc = &secy->tx_sc; | |
598 | ||
599 | /* 10.5.1 TX SA assignment */ | |
600 | tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]); | |
601 | if (!tx_sa) { | |
602 | secy->operational = false; | |
603 | kfree_skb(skb); | |
604 | return ERR_PTR(-EINVAL); | |
605 | } | |
606 | ||
607 | if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || | |
608 | skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { | |
609 | struct sk_buff *nskb = skb_copy_expand(skb, | |
610 | MACSEC_NEEDED_HEADROOM, | |
611 | MACSEC_NEEDED_TAILROOM, | |
612 | GFP_ATOMIC); | |
613 | if (likely(nskb)) { | |
614 | consume_skb(skb); | |
615 | skb = nskb; | |
616 | } else { | |
617 | macsec_txsa_put(tx_sa); | |
618 | kfree_skb(skb); | |
619 | return ERR_PTR(-ENOMEM); | |
620 | } | |
621 | } else { | |
622 | skb = skb_unshare(skb, GFP_ATOMIC); | |
623 | if (!skb) { | |
624 | macsec_txsa_put(tx_sa); | |
625 | return ERR_PTR(-ENOMEM); | |
626 | } | |
627 | } | |
628 | ||
629 | unprotected_len = skb->len; | |
630 | eth = eth_hdr(skb); | |
b1671253 | 631 | sci_present = macsec_send_sci(secy); |
d58ff351 | 632 | hh = skb_push(skb, macsec_extra_len(sci_present)); |
c09440f7 SD |
633 | memmove(hh, eth, 2 * ETH_ALEN); |
634 | ||
635 | pn = tx_sa_update_pn(tx_sa, secy); | |
a21ecf0e | 636 | if (pn.full64 == 0) { |
c09440f7 SD |
637 | macsec_txsa_put(tx_sa); |
638 | kfree_skb(skb); | |
639 | return ERR_PTR(-ENOLINK); | |
640 | } | |
a21ecf0e | 641 | macsec_fill_sectag(hh, secy, pn.lower, sci_present); |
c09440f7 SD |
642 | macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN); |
643 | ||
c09440f7 SD |
644 | skb_put(skb, secy->icv_len); |
645 | ||
646 | if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { | |
647 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); | |
648 | ||
649 | u64_stats_update_begin(&secy_stats->syncp); | |
650 | secy_stats->stats.OutPktsTooLong++; | |
651 | u64_stats_update_end(&secy_stats->syncp); | |
652 | ||
653 | macsec_txsa_put(tx_sa); | |
654 | kfree_skb(skb); | |
655 | return ERR_PTR(-EINVAL); | |
656 | } | |
657 | ||
5294b830 JD |
658 | ret = skb_cow_data(skb, 0, &trailer); |
659 | if (unlikely(ret < 0)) { | |
660 | macsec_txsa_put(tx_sa); | |
661 | kfree_skb(skb); | |
662 | return ERR_PTR(ret); | |
663 | } | |
664 | ||
665 | req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
666 | if (!req) { |
667 | macsec_txsa_put(tx_sa); | |
668 | kfree_skb(skb); | |
669 | return ERR_PTR(-ENOMEM); | |
670 | } | |
671 | ||
a21ecf0e EM |
672 | if (secy->xpn) |
673 | macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt); | |
674 | else | |
675 | macsec_fill_iv(iv, secy->sci, pn.lower); | |
5d9649b3 | 676 | |
5294b830 | 677 | sg_init_table(sg, ret); |
cda7ea69 JD |
678 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
679 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 680 | aead_request_free(req); |
cda7ea69 JD |
681 | macsec_txsa_put(tx_sa); |
682 | kfree_skb(skb); | |
683 | return ERR_PTR(ret); | |
684 | } | |
c09440f7 SD |
685 | |
686 | if (tx_sc->encrypt) { | |
e0f841f5 | 687 | int len = skb->len - macsec_hdr_len(sci_present) - |
c09440f7 SD |
688 | secy->icv_len; |
689 | aead_request_set_crypt(req, sg, sg, len, iv); | |
e0f841f5 | 690 | aead_request_set_ad(req, macsec_hdr_len(sci_present)); |
c09440f7 SD |
691 | } else { |
692 | aead_request_set_crypt(req, sg, sg, 0, iv); | |
693 | aead_request_set_ad(req, skb->len - secy->icv_len); | |
694 | } | |
695 | ||
696 | macsec_skb_cb(skb)->req = req; | |
697 | macsec_skb_cb(skb)->tx_sa = tx_sa; | |
91ec9bd5 | 698 | macsec_skb_cb(skb)->has_sci = sci_present; |
c09440f7 SD |
699 | aead_request_set_callback(req, 0, macsec_encrypt_done, skb); |
700 | ||
701 | dev_hold(skb->dev); | |
702 | ret = crypto_aead_encrypt(req); | |
703 | if (ret == -EINPROGRESS) { | |
704 | return ERR_PTR(ret); | |
705 | } else if (ret != 0) { | |
706 | dev_put(skb->dev); | |
707 | kfree_skb(skb); | |
708 | aead_request_free(req); | |
709 | macsec_txsa_put(tx_sa); | |
710 | return ERR_PTR(-EINVAL); | |
711 | } | |
712 | ||
713 | dev_put(skb->dev); | |
714 | aead_request_free(req); | |
715 | macsec_txsa_put(tx_sa); | |
716 | ||
717 | return skb; | |
718 | } | |
719 | ||
720 | static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) | |
721 | { | |
722 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
723 | struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); | |
724 | struct macsec_eth_header *hdr = macsec_ethhdr(skb); | |
725 | u32 lowest_pn = 0; | |
726 | ||
727 | spin_lock(&rx_sa->lock); | |
a21ecf0e EM |
728 | if (rx_sa->next_pn_halves.lower >= secy->replay_window) |
729 | lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window; | |
c09440f7 SD |
730 | |
731 | /* Now perform replay protection check again | |
732 | * (see IEEE 802.1AE-2006 figure 10-5) | |
733 | */ | |
a21ecf0e EM |
734 | if (secy->replay_protect && pn < lowest_pn && |
735 | (!secy->xpn || pn_same_half(pn, lowest_pn))) { | |
c09440f7 SD |
736 | spin_unlock(&rx_sa->lock); |
737 | u64_stats_update_begin(&rxsc_stats->syncp); | |
738 | rxsc_stats->stats.InPktsLate++; | |
739 | u64_stats_update_end(&rxsc_stats->syncp); | |
32d0a49d | 740 | DEV_STATS_INC(secy->netdev, rx_dropped); |
c09440f7 SD |
741 | return false; |
742 | } | |
743 | ||
744 | if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { | |
91ec9bd5 | 745 | unsigned int msdu_len = macsec_msdu_len(skb); |
c09440f7 SD |
746 | u64_stats_update_begin(&rxsc_stats->syncp); |
747 | if (hdr->tci_an & MACSEC_TCI_E) | |
91ec9bd5 | 748 | rxsc_stats->stats.InOctetsDecrypted += msdu_len; |
c09440f7 | 749 | else |
91ec9bd5 | 750 | rxsc_stats->stats.InOctetsValidated += msdu_len; |
c09440f7 SD |
751 | u64_stats_update_end(&rxsc_stats->syncp); |
752 | } | |
753 | ||
754 | if (!macsec_skb_cb(skb)->valid) { | |
755 | spin_unlock(&rx_sa->lock); | |
756 | ||
757 | /* 10.6.5 */ | |
758 | if (hdr->tci_an & MACSEC_TCI_C || | |
759 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
760 | u64_stats_update_begin(&rxsc_stats->syncp); | |
761 | rxsc_stats->stats.InPktsNotValid++; | |
762 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 | 763 | this_cpu_inc(rx_sa->stats->InPktsNotValid); |
32d0a49d | 764 | DEV_STATS_INC(secy->netdev, rx_errors); |
c09440f7 SD |
765 | return false; |
766 | } | |
767 | ||
768 | u64_stats_update_begin(&rxsc_stats->syncp); | |
769 | if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { | |
770 | rxsc_stats->stats.InPktsInvalid++; | |
771 | this_cpu_inc(rx_sa->stats->InPktsInvalid); | |
772 | } else if (pn < lowest_pn) { | |
773 | rxsc_stats->stats.InPktsDelayed++; | |
774 | } else { | |
775 | rxsc_stats->stats.InPktsUnchecked++; | |
776 | } | |
777 | u64_stats_update_end(&rxsc_stats->syncp); | |
778 | } else { | |
779 | u64_stats_update_begin(&rxsc_stats->syncp); | |
780 | if (pn < lowest_pn) { | |
781 | rxsc_stats->stats.InPktsDelayed++; | |
782 | } else { | |
783 | rxsc_stats->stats.InPktsOK++; | |
784 | this_cpu_inc(rx_sa->stats->InPktsOK); | |
785 | } | |
786 | u64_stats_update_end(&rxsc_stats->syncp); | |
787 | ||
a21ecf0e EM |
788 | // Instead of "pn >=" - to support pn overflow in xpn |
789 | if (pn + 1 > rx_sa->next_pn_halves.lower) { | |
790 | rx_sa->next_pn_halves.lower = pn + 1; | |
791 | } else if (secy->xpn && | |
792 | !pn_same_half(pn, rx_sa->next_pn_halves.lower)) { | |
793 | rx_sa->next_pn_halves.upper++; | |
794 | rx_sa->next_pn_halves.lower = pn + 1; | |
795 | } | |
796 | ||
c09440f7 SD |
797 | spin_unlock(&rx_sa->lock); |
798 | } | |
799 | ||
800 | return true; | |
801 | } | |
802 | ||
803 | static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) | |
804 | { | |
805 | skb->pkt_type = PACKET_HOST; | |
806 | skb->protocol = eth_type_trans(skb, dev); | |
807 | ||
808 | skb_reset_network_header(skb); | |
809 | if (!skb_transport_header_was_set(skb)) | |
810 | skb_reset_transport_header(skb); | |
811 | skb_reset_mac_len(skb); | |
812 | } | |
813 | ||
814 | static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) | |
815 | { | |
7d8b16b9 | 816 | skb->ip_summed = CHECKSUM_NONE; |
c09440f7 SD |
817 | memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); |
818 | skb_pull(skb, hdr_len); | |
819 | pskb_trim_unique(skb, skb->len - icv_len); | |
820 | } | |
821 | ||
822 | static void count_rx(struct net_device *dev, int len) | |
823 | { | |
bf98bbe9 | 824 | dev_sw_netstats_rx_add(dev, len); |
c09440f7 SD |
825 | } |
826 | ||
23b8b93b | 827 | static void macsec_decrypt_done(void *data, int err) |
c09440f7 | 828 | { |
23b8b93b | 829 | struct sk_buff *skb = data; |
c09440f7 SD |
830 | struct net_device *dev = skb->dev; |
831 | struct macsec_dev *macsec = macsec_priv(dev); | |
832 | struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; | |
c78ebe1d | 833 | struct macsec_rx_sc *rx_sc = rx_sa->sc; |
863483c9 | 834 | int len; |
c09440f7 SD |
835 | u32 pn; |
836 | ||
837 | aead_request_free(macsec_skb_cb(skb)->req); | |
838 | ||
b3bdc3ac LR |
839 | if (!err) |
840 | macsec_skb_cb(skb)->valid = true; | |
841 | ||
c09440f7 SD |
842 | rcu_read_lock_bh(); |
843 | pn = ntohl(macsec_ethhdr(skb)->packet_number); | |
844 | if (!macsec_post_decrypt(skb, &macsec->secy, pn)) { | |
845 | rcu_read_unlock_bh(); | |
846 | kfree_skb(skb); | |
847 | goto out; | |
848 | } | |
849 | ||
850 | macsec_finalize_skb(skb, macsec->secy.icv_len, | |
851 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
91ec9bd5 | 852 | len = skb->len; |
c09440f7 SD |
853 | macsec_reset_skb(skb, macsec->secy.netdev); |
854 | ||
863483c9 | 855 | if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS) |
c09440f7 | 856 | count_rx(dev, len); |
c09440f7 SD |
857 | |
858 | rcu_read_unlock_bh(); | |
859 | ||
860 | out: | |
861 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 862 | macsec_rxsc_put(rx_sc); |
c09440f7 | 863 | dev_put(dev); |
c09440f7 SD |
864 | } |
865 | ||
866 | static struct sk_buff *macsec_decrypt(struct sk_buff *skb, | |
867 | struct net_device *dev, | |
868 | struct macsec_rx_sa *rx_sa, | |
869 | sci_t sci, | |
870 | struct macsec_secy *secy) | |
871 | { | |
872 | int ret; | |
5d9649b3 | 873 | struct scatterlist *sg; |
5294b830 | 874 | struct sk_buff *trailer; |
5d9649b3 | 875 | unsigned char *iv; |
c09440f7 SD |
876 | struct aead_request *req; |
877 | struct macsec_eth_header *hdr; | |
a21ecf0e | 878 | u32 hdr_pn; |
c09440f7 SD |
879 | u16 icv_len = secy->icv_len; |
880 | ||
881 | macsec_skb_cb(skb)->valid = false; | |
882 | skb = skb_share_check(skb, GFP_ATOMIC); | |
883 | if (!skb) | |
c3b7d0bd | 884 | return ERR_PTR(-ENOMEM); |
c09440f7 | 885 | |
5294b830 JD |
886 | ret = skb_cow_data(skb, 0, &trailer); |
887 | if (unlikely(ret < 0)) { | |
888 | kfree_skb(skb); | |
889 | return ERR_PTR(ret); | |
890 | } | |
891 | req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret); | |
c09440f7 SD |
892 | if (!req) { |
893 | kfree_skb(skb); | |
c3b7d0bd | 894 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
895 | } |
896 | ||
897 | hdr = (struct macsec_eth_header *)skb->data; | |
a21ecf0e EM |
898 | hdr_pn = ntohl(hdr->packet_number); |
899 | ||
900 | if (secy->xpn) { | |
901 | pn_t recovered_pn = rx_sa->next_pn_halves; | |
902 | ||
903 | recovered_pn.lower = hdr_pn; | |
904 | if (hdr_pn < rx_sa->next_pn_halves.lower && | |
905 | !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower)) | |
906 | recovered_pn.upper++; | |
907 | ||
908 | macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64, | |
909 | rx_sa->key.salt); | |
910 | } else { | |
911 | macsec_fill_iv(iv, sci, hdr_pn); | |
912 | } | |
c09440f7 | 913 | |
5294b830 | 914 | sg_init_table(sg, ret); |
cda7ea69 JD |
915 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
916 | if (unlikely(ret < 0)) { | |
5aba2ba5 | 917 | aead_request_free(req); |
cda7ea69 JD |
918 | kfree_skb(skb); |
919 | return ERR_PTR(ret); | |
920 | } | |
c09440f7 SD |
921 | |
922 | if (hdr->tci_an & MACSEC_TCI_E) { | |
923 | /* confidentiality: ethernet + macsec header | |
924 | * authenticated, encrypted payload | |
925 | */ | |
926 | int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci); | |
927 | ||
928 | aead_request_set_crypt(req, sg, sg, len, iv); | |
929 | aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci)); | |
930 | skb = skb_unshare(skb, GFP_ATOMIC); | |
931 | if (!skb) { | |
932 | aead_request_free(req); | |
c3b7d0bd | 933 | return ERR_PTR(-ENOMEM); |
c09440f7 SD |
934 | } |
935 | } else { | |
936 | /* integrity only: all headers + data authenticated */ | |
937 | aead_request_set_crypt(req, sg, sg, icv_len, iv); | |
938 | aead_request_set_ad(req, skb->len - icv_len); | |
939 | } | |
940 | ||
941 | macsec_skb_cb(skb)->req = req; | |
c09440f7 SD |
942 | skb->dev = dev; |
943 | aead_request_set_callback(req, 0, macsec_decrypt_done, skb); | |
944 | ||
945 | dev_hold(dev); | |
946 | ret = crypto_aead_decrypt(req); | |
947 | if (ret == -EINPROGRESS) { | |
c3b7d0bd | 948 | return ERR_PTR(ret); |
c09440f7 SD |
949 | } else if (ret != 0) { |
950 | /* decryption/authentication failed | |
951 | * 10.6 if validateFrames is disabled, deliver anyway | |
952 | */ | |
953 | if (ret != -EBADMSG) { | |
954 | kfree_skb(skb); | |
c3b7d0bd | 955 | skb = ERR_PTR(ret); |
c09440f7 SD |
956 | } |
957 | } else { | |
958 | macsec_skb_cb(skb)->valid = true; | |
959 | } | |
960 | dev_put(dev); | |
961 | ||
962 | aead_request_free(req); | |
963 | ||
964 | return skb; | |
965 | } | |
966 | ||
967 | static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) | |
968 | { | |
969 | struct macsec_rx_sc *rx_sc; | |
970 | ||
971 | for_each_rxsc(secy, rx_sc) { | |
972 | if (rx_sc->sci == sci) | |
973 | return rx_sc; | |
974 | } | |
975 | ||
976 | return NULL; | |
977 | } | |
978 | ||
979 | static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) | |
980 | { | |
981 | struct macsec_rx_sc *rx_sc; | |
982 | ||
983 | for_each_rxsc_rtnl(secy, rx_sc) { | |
984 | if (rx_sc->sci == sci) | |
985 | return rx_sc; | |
986 | } | |
987 | ||
988 | return NULL; | |
989 | } | |
990 | ||
3cf3227a | 991 | static enum rx_handler_result handle_not_macsec(struct sk_buff *skb) |
c09440f7 | 992 | { |
3cf3227a AT |
993 | /* Deliver to the uncontrolled port by default */ |
994 | enum rx_handler_result ret = RX_HANDLER_PASS; | |
f428011b | 995 | struct ethhdr *hdr = eth_hdr(skb); |
860ead89 | 996 | struct metadata_dst *md_dst; |
c09440f7 SD |
997 | struct macsec_rxh_data *rxd; |
998 | struct macsec_dev *macsec; | |
999 | ||
1000 | rcu_read_lock(); | |
1001 | rxd = macsec_data_rcu(skb->dev); | |
860ead89 | 1002 | md_dst = skb_metadata_dst(skb); |
c09440f7 | 1003 | |
c09440f7 SD |
1004 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
1005 | struct sk_buff *nskb; | |
c09440f7 | 1006 | struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
f428011b MS |
1007 | struct net_device *ndev = macsec->secy.netdev; |
1008 | ||
1009 | /* If h/w offloading is enabled, HW decodes frames and strips | |
1010 | * the SecTAG, so we have to deduce which port to deliver to. | |
1011 | */ | |
1012 | if (macsec_is_offloaded(macsec) && netif_running(ndev)) { | |
7661351a EH |
1013 | struct macsec_rx_sc *rx_sc = NULL; |
1014 | ||
1015 | if (md_dst && md_dst->type == METADATA_MACSEC) | |
1016 | rx_sc = find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci); | |
1017 | ||
1018 | if (md_dst && md_dst->type == METADATA_MACSEC && !rx_sc) | |
860ead89 LN |
1019 | continue; |
1020 | ||
f428011b MS |
1021 | if (ether_addr_equal_64bits(hdr->h_dest, |
1022 | ndev->dev_addr)) { | |
1023 | /* exact match, divert skb to this port */ | |
1024 | skb->dev = ndev; | |
1025 | skb->pkt_type = PACKET_HOST; | |
1026 | ret = RX_HANDLER_ANOTHER; | |
1027 | goto out; | |
1028 | } else if (is_multicast_ether_addr_64bits( | |
1029 | hdr->h_dest)) { | |
1030 | /* multicast frame, deliver on this port too */ | |
1031 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1032 | if (!nskb) | |
1033 | break; | |
1034 | ||
1035 | nskb->dev = ndev; | |
1036 | if (ether_addr_equal_64bits(hdr->h_dest, | |
1037 | ndev->broadcast)) | |
1038 | nskb->pkt_type = PACKET_BROADCAST; | |
1039 | else | |
1040 | nskb->pkt_type = PACKET_MULTICAST; | |
1041 | ||
baebdf48 | 1042 | __netif_rx(nskb); |
7661351a EH |
1043 | } else if (rx_sc || ndev->flags & IFF_PROMISC) { |
1044 | skb->dev = ndev; | |
1045 | skb->pkt_type = PACKET_HOST; | |
1046 | ret = RX_HANDLER_ANOTHER; | |
1047 | goto out; | |
f428011b | 1048 | } |
7661351a | 1049 | |
f428011b MS |
1050 | continue; |
1051 | } | |
c09440f7 | 1052 | |
f428011b MS |
1053 | /* 10.6 If the management control validateFrames is not |
1054 | * Strict, frames without a SecTAG are received, counted, and | |
1055 | * delivered to the Controlled Port | |
1056 | */ | |
1057 | if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
c09440f7 SD |
1058 | u64_stats_update_begin(&secy_stats->syncp); |
1059 | secy_stats->stats.InPktsNoTag++; | |
1060 | u64_stats_update_end(&secy_stats->syncp); | |
32d0a49d | 1061 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
c09440f7 SD |
1062 | continue; |
1063 | } | |
1064 | ||
1065 | /* deliver on this port */ | |
1066 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1067 | if (!nskb) | |
1068 | break; | |
1069 | ||
f428011b | 1070 | nskb->dev = ndev; |
c09440f7 | 1071 | |
baebdf48 | 1072 | if (__netif_rx(nskb) == NET_RX_SUCCESS) { |
c09440f7 SD |
1073 | u64_stats_update_begin(&secy_stats->syncp); |
1074 | secy_stats->stats.InPktsUntagged++; | |
1075 | u64_stats_update_end(&secy_stats->syncp); | |
c09440f7 SD |
1076 | } |
1077 | } | |
1078 | ||
3cf3227a | 1079 | out: |
c09440f7 | 1080 | rcu_read_unlock(); |
3cf3227a | 1081 | return ret; |
c09440f7 SD |
1082 | } |
1083 | ||
1084 | static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) | |
1085 | { | |
1086 | struct sk_buff *skb = *pskb; | |
1087 | struct net_device *dev = skb->dev; | |
1088 | struct macsec_eth_header *hdr; | |
1089 | struct macsec_secy *secy = NULL; | |
1090 | struct macsec_rx_sc *rx_sc; | |
1091 | struct macsec_rx_sa *rx_sa; | |
1092 | struct macsec_rxh_data *rxd; | |
1093 | struct macsec_dev *macsec; | |
c7cc9200 | 1094 | unsigned int len; |
c09440f7 | 1095 | sci_t sci; |
a21ecf0e | 1096 | u32 hdr_pn; |
c09440f7 SD |
1097 | bool cbit; |
1098 | struct pcpu_rx_sc_stats *rxsc_stats; | |
1099 | struct pcpu_secy_stats *secy_stats; | |
1100 | bool pulled_sci; | |
5491e7c6 | 1101 | int ret; |
c09440f7 SD |
1102 | |
1103 | if (skb_headroom(skb) < ETH_HLEN) | |
1104 | goto drop_direct; | |
1105 | ||
1106 | hdr = macsec_ethhdr(skb); | |
3cf3227a AT |
1107 | if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) |
1108 | return handle_not_macsec(skb); | |
c09440f7 SD |
1109 | |
1110 | skb = skb_unshare(skb, GFP_ATOMIC); | |
095c02da AS |
1111 | *pskb = skb; |
1112 | if (!skb) | |
c09440f7 | 1113 | return RX_HANDLER_CONSUMED; |
c09440f7 SD |
1114 | |
1115 | pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); | |
1116 | if (!pulled_sci) { | |
1117 | if (!pskb_may_pull(skb, macsec_extra_len(false))) | |
1118 | goto drop_direct; | |
1119 | } | |
1120 | ||
1121 | hdr = macsec_ethhdr(skb); | |
1122 | ||
1123 | /* Frames with a SecTAG that has the TCI E bit set but the C | |
1124 | * bit clear are discarded, as this reserved encoding is used | |
1125 | * to identify frames with a SecTAG that are not to be | |
1126 | * delivered to the Controlled Port. | |
1127 | */ | |
1128 | if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) | |
1129 | return RX_HANDLER_PASS; | |
1130 | ||
1131 | /* now, pull the extra length */ | |
1132 | if (hdr->tci_an & MACSEC_TCI_SC) { | |
1133 | if (!pulled_sci) | |
1134 | goto drop_direct; | |
1135 | } | |
1136 | ||
1137 | /* ethernet header is part of crypto processing */ | |
1138 | skb_push(skb, ETH_HLEN); | |
1139 | ||
1140 | macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); | |
1141 | macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; | |
1142 | sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); | |
1143 | ||
1144 | rcu_read_lock(); | |
1145 | rxd = macsec_data_rcu(skb->dev); | |
1146 | ||
1147 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1148 | struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); | |
7979472b | 1149 | |
c78ebe1d | 1150 | sc = sc ? macsec_rxsc_get(sc) : NULL; |
c09440f7 SD |
1151 | |
1152 | if (sc) { | |
1153 | secy = &macsec->secy; | |
1154 | rx_sc = sc; | |
1155 | break; | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | if (!secy) | |
1160 | goto nosci; | |
1161 | ||
1162 | dev = secy->netdev; | |
1163 | macsec = macsec_priv(dev); | |
1164 | secy_stats = this_cpu_ptr(macsec->stats); | |
1165 | rxsc_stats = this_cpu_ptr(rx_sc->stats); | |
1166 | ||
a21ecf0e | 1167 | if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) { |
c09440f7 SD |
1168 | u64_stats_update_begin(&secy_stats->syncp); |
1169 | secy_stats->stats.InPktsBadTag++; | |
1170 | u64_stats_update_end(&secy_stats->syncp); | |
32d0a49d | 1171 | DEV_STATS_INC(secy->netdev, rx_errors); |
c09440f7 SD |
1172 | goto drop_nosa; |
1173 | } | |
1174 | ||
1175 | rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); | |
1176 | if (!rx_sa) { | |
1177 | /* 10.6.1 if the SA is not in use */ | |
1178 | ||
1179 | /* If validateFrames is Strict or the C bit in the | |
1180 | * SecTAG is set, discard | |
1181 | */ | |
91ec9bd5 | 1182 | struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc); |
c09440f7 SD |
1183 | if (hdr->tci_an & MACSEC_TCI_C || |
1184 | secy->validate_frames == MACSEC_VALIDATE_STRICT) { | |
1185 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1186 | rxsc_stats->stats.InPktsNotUsingSA++; | |
1187 | u64_stats_update_end(&rxsc_stats->syncp); | |
32d0a49d | 1188 | DEV_STATS_INC(secy->netdev, rx_errors); |
91ec9bd5 CY |
1189 | if (active_rx_sa) |
1190 | this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA); | |
c09440f7 SD |
1191 | goto drop_nosa; |
1192 | } | |
1193 | ||
1194 | /* not Strict, the frame (with the SecTAG and ICV | |
1195 | * removed) is delivered to the Controlled Port. | |
1196 | */ | |
1197 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1198 | rxsc_stats->stats.InPktsUnusedSA++; | |
1199 | u64_stats_update_end(&rxsc_stats->syncp); | |
91ec9bd5 CY |
1200 | if (active_rx_sa) |
1201 | this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA); | |
c09440f7 SD |
1202 | goto deliver; |
1203 | } | |
1204 | ||
1205 | /* First, PN check to avoid decrypting obviously wrong packets */ | |
a21ecf0e | 1206 | hdr_pn = ntohl(hdr->packet_number); |
c09440f7 SD |
1207 | if (secy->replay_protect) { |
1208 | bool late; | |
1209 | ||
1210 | spin_lock(&rx_sa->lock); | |
a21ecf0e EM |
1211 | late = rx_sa->next_pn_halves.lower >= secy->replay_window && |
1212 | hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window); | |
1213 | ||
1214 | if (secy->xpn) | |
1215 | late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn); | |
c09440f7 SD |
1216 | spin_unlock(&rx_sa->lock); |
1217 | ||
1218 | if (late) { | |
1219 | u64_stats_update_begin(&rxsc_stats->syncp); | |
1220 | rxsc_stats->stats.InPktsLate++; | |
1221 | u64_stats_update_end(&rxsc_stats->syncp); | |
32d0a49d | 1222 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
c09440f7 SD |
1223 | goto drop; |
1224 | } | |
1225 | } | |
1226 | ||
e3a3b626 BG |
1227 | macsec_skb_cb(skb)->rx_sa = rx_sa; |
1228 | ||
c09440f7 SD |
1229 | /* Disabled && !changed text => skip validation */ |
1230 | if (hdr->tci_an & MACSEC_TCI_C || | |
1231 | secy->validate_frames != MACSEC_VALIDATE_DISABLED) | |
1232 | skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); | |
1233 | ||
c3b7d0bd SD |
1234 | if (IS_ERR(skb)) { |
1235 | /* the decrypt callback needs the reference */ | |
c78ebe1d | 1236 | if (PTR_ERR(skb) != -EINPROGRESS) { |
c3b7d0bd | 1237 | macsec_rxsa_put(rx_sa); |
c78ebe1d SD |
1238 | macsec_rxsc_put(rx_sc); |
1239 | } | |
c09440f7 SD |
1240 | rcu_read_unlock(); |
1241 | *pskb = NULL; | |
1242 | return RX_HANDLER_CONSUMED; | |
1243 | } | |
1244 | ||
a21ecf0e | 1245 | if (!macsec_post_decrypt(skb, secy, hdr_pn)) |
c09440f7 SD |
1246 | goto drop; |
1247 | ||
1248 | deliver: | |
1249 | macsec_finalize_skb(skb, secy->icv_len, | |
1250 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); | |
91ec9bd5 | 1251 | len = skb->len; |
c09440f7 SD |
1252 | macsec_reset_skb(skb, secy->netdev); |
1253 | ||
497f358a SD |
1254 | if (rx_sa) |
1255 | macsec_rxsa_put(rx_sa); | |
c78ebe1d | 1256 | macsec_rxsc_put(rx_sc); |
5491e7c6 | 1257 | |
ba56d8ce | 1258 | skb_orphan(skb); |
5491e7c6 PA |
1259 | ret = gro_cells_receive(&macsec->gro_cells, skb); |
1260 | if (ret == NET_RX_SUCCESS) | |
c7cc9200 | 1261 | count_rx(dev, len); |
5491e7c6 | 1262 | else |
32d0a49d | 1263 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
c09440f7 SD |
1264 | |
1265 | rcu_read_unlock(); | |
1266 | ||
5491e7c6 PA |
1267 | *pskb = NULL; |
1268 | return RX_HANDLER_CONSUMED; | |
c09440f7 SD |
1269 | |
1270 | drop: | |
1271 | macsec_rxsa_put(rx_sa); | |
1272 | drop_nosa: | |
c78ebe1d | 1273 | macsec_rxsc_put(rx_sc); |
c09440f7 SD |
1274 | rcu_read_unlock(); |
1275 | drop_direct: | |
1276 | kfree_skb(skb); | |
1277 | *pskb = NULL; | |
1278 | return RX_HANDLER_CONSUMED; | |
1279 | ||
1280 | nosci: | |
1281 | /* 10.6.1 if the SC is not found */ | |
1282 | cbit = !!(hdr->tci_an & MACSEC_TCI_C); | |
1283 | if (!cbit) | |
b1671253 | 1284 | macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN, |
c09440f7 SD |
1285 | macsec_extra_len(macsec_skb_cb(skb)->has_sci)); |
1286 | ||
1287 | list_for_each_entry_rcu(macsec, &rxd->secys, secys) { | |
1288 | struct sk_buff *nskb; | |
c09440f7 SD |
1289 | |
1290 | secy_stats = this_cpu_ptr(macsec->stats); | |
1291 | ||
1292 | /* If validateFrames is Strict or the C bit in the | |
1293 | * SecTAG is set, discard | |
1294 | */ | |
1295 | if (cbit || | |
1296 | macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { | |
1297 | u64_stats_update_begin(&secy_stats->syncp); | |
1298 | secy_stats->stats.InPktsNoSCI++; | |
1299 | u64_stats_update_end(&secy_stats->syncp); | |
32d0a49d | 1300 | DEV_STATS_INC(macsec->secy.netdev, rx_errors); |
c09440f7 SD |
1301 | continue; |
1302 | } | |
1303 | ||
1304 | /* not strict, the frame (with the SecTAG and ICV | |
1305 | * removed) is delivered to the Controlled Port. | |
1306 | */ | |
1307 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1308 | if (!nskb) | |
1309 | break; | |
1310 | ||
1311 | macsec_reset_skb(nskb, macsec->secy.netdev); | |
1312 | ||
baebdf48 | 1313 | ret = __netif_rx(nskb); |
c09440f7 SD |
1314 | if (ret == NET_RX_SUCCESS) { |
1315 | u64_stats_update_begin(&secy_stats->syncp); | |
1316 | secy_stats->stats.InPktsUnknownSCI++; | |
1317 | u64_stats_update_end(&secy_stats->syncp); | |
1318 | } else { | |
32d0a49d | 1319 | DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
c09440f7 SD |
1320 | } |
1321 | } | |
1322 | ||
1323 | rcu_read_unlock(); | |
1324 | *pskb = skb; | |
1325 | return RX_HANDLER_PASS; | |
1326 | } | |
1327 | ||
1328 | static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) | |
1329 | { | |
1330 | struct crypto_aead *tfm; | |
1331 | int ret; | |
1332 | ||
d3287e40 | 1333 | tfm = crypto_alloc_aead("gcm(aes)", 0, 0); |
34aedfee DC |
1334 | |
1335 | if (IS_ERR(tfm)) | |
1336 | return tfm; | |
c09440f7 SD |
1337 | |
1338 | ret = crypto_aead_setkey(tfm, key, key_len); | |
34aedfee DC |
1339 | if (ret < 0) |
1340 | goto fail; | |
c09440f7 SD |
1341 | |
1342 | ret = crypto_aead_setauthsize(tfm, icv_len); | |
34aedfee DC |
1343 | if (ret < 0) |
1344 | goto fail; | |
c09440f7 SD |
1345 | |
1346 | return tfm; | |
34aedfee DC |
1347 | fail: |
1348 | crypto_free_aead(tfm); | |
1349 | return ERR_PTR(ret); | |
c09440f7 SD |
1350 | } |
1351 | ||
1352 | static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, | |
1353 | int icv_len) | |
1354 | { | |
1355 | rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); | |
1356 | if (!rx_sa->stats) | |
34aedfee | 1357 | return -ENOMEM; |
c09440f7 SD |
1358 | |
1359 | rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1360 | if (IS_ERR(rx_sa->key.tfm)) { |
c09440f7 | 1361 | free_percpu(rx_sa->stats); |
34aedfee | 1362 | return PTR_ERR(rx_sa->key.tfm); |
c09440f7 SD |
1363 | } |
1364 | ||
48ef50fa | 1365 | rx_sa->ssci = MACSEC_UNDEF_SSCI; |
c09440f7 SD |
1366 | rx_sa->active = false; |
1367 | rx_sa->next_pn = 1; | |
e187246f | 1368 | refcount_set(&rx_sa->refcnt, 1); |
c09440f7 SD |
1369 | spin_lock_init(&rx_sa->lock); |
1370 | ||
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static void clear_rx_sa(struct macsec_rx_sa *rx_sa) | |
1375 | { | |
1376 | rx_sa->active = false; | |
1377 | ||
1378 | macsec_rxsa_put(rx_sa); | |
1379 | } | |
1380 | ||
1381 | static void free_rx_sc(struct macsec_rx_sc *rx_sc) | |
1382 | { | |
1383 | int i; | |
1384 | ||
1385 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
1386 | struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); | |
1387 | ||
1388 | RCU_INIT_POINTER(rx_sc->sa[i], NULL); | |
1389 | if (sa) | |
1390 | clear_rx_sa(sa); | |
1391 | } | |
1392 | ||
1393 | macsec_rxsc_put(rx_sc); | |
1394 | } | |
1395 | ||
1396 | static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) | |
1397 | { | |
1398 | struct macsec_rx_sc *rx_sc, __rcu **rx_scp; | |
1399 | ||
1400 | for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); | |
1401 | rx_sc; | |
1402 | rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { | |
1403 | if (rx_sc->sci == sci) { | |
1404 | if (rx_sc->active) | |
1405 | secy->n_rx_sc--; | |
1406 | rcu_assign_pointer(*rx_scp, rx_sc->next); | |
1407 | return rx_sc; | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | return NULL; | |
1412 | } | |
1413 | ||
73a4b31c SD |
1414 | static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci, |
1415 | bool active) | |
c09440f7 SD |
1416 | { |
1417 | struct macsec_rx_sc *rx_sc; | |
1418 | struct macsec_dev *macsec; | |
1419 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
1420 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
1421 | struct macsec_secy *secy; | |
1422 | ||
1423 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
1424 | if (find_rx_sc_rtnl(&macsec->secy, sci)) | |
1425 | return ERR_PTR(-EEXIST); | |
1426 | } | |
1427 | ||
1428 | rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); | |
1429 | if (!rx_sc) | |
1430 | return ERR_PTR(-ENOMEM); | |
1431 | ||
1432 | rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); | |
1433 | if (!rx_sc->stats) { | |
1434 | kfree(rx_sc); | |
1435 | return ERR_PTR(-ENOMEM); | |
1436 | } | |
1437 | ||
1438 | rx_sc->sci = sci; | |
73a4b31c | 1439 | rx_sc->active = active; |
8676d76f | 1440 | refcount_set(&rx_sc->refcnt, 1); |
c09440f7 SD |
1441 | |
1442 | secy = &macsec_priv(dev)->secy; | |
1443 | rcu_assign_pointer(rx_sc->next, secy->rx_sc); | |
1444 | rcu_assign_pointer(secy->rx_sc, rx_sc); | |
1445 | ||
1446 | if (rx_sc->active) | |
1447 | secy->n_rx_sc++; | |
1448 | ||
1449 | return rx_sc; | |
1450 | } | |
1451 | ||
1452 | static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, | |
1453 | int icv_len) | |
1454 | { | |
1455 | tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); | |
1456 | if (!tx_sa->stats) | |
34aedfee | 1457 | return -ENOMEM; |
c09440f7 SD |
1458 | |
1459 | tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); | |
34aedfee | 1460 | if (IS_ERR(tx_sa->key.tfm)) { |
c09440f7 | 1461 | free_percpu(tx_sa->stats); |
34aedfee | 1462 | return PTR_ERR(tx_sa->key.tfm); |
c09440f7 SD |
1463 | } |
1464 | ||
48ef50fa | 1465 | tx_sa->ssci = MACSEC_UNDEF_SSCI; |
c09440f7 | 1466 | tx_sa->active = false; |
28206cdb | 1467 | refcount_set(&tx_sa->refcnt, 1); |
c09440f7 SD |
1468 | spin_lock_init(&tx_sa->lock); |
1469 | ||
1470 | return 0; | |
1471 | } | |
1472 | ||
1473 | static void clear_tx_sa(struct macsec_tx_sa *tx_sa) | |
1474 | { | |
1475 | tx_sa->active = false; | |
1476 | ||
1477 | macsec_txsa_put(tx_sa); | |
1478 | } | |
1479 | ||
489111e5 | 1480 | static struct genl_family macsec_fam; |
c09440f7 SD |
1481 | |
1482 | static struct net_device *get_dev_from_nl(struct net *net, | |
1483 | struct nlattr **attrs) | |
1484 | { | |
1485 | int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); | |
1486 | struct net_device *dev; | |
1487 | ||
1488 | dev = __dev_get_by_index(net, ifindex); | |
1489 | if (!dev) | |
1490 | return ERR_PTR(-ENODEV); | |
1491 | ||
1492 | if (!netif_is_macsec(dev)) | |
1493 | return ERR_PTR(-ENODEV); | |
1494 | ||
1495 | return dev; | |
1496 | } | |
1497 | ||
791bb3fc MS |
1498 | static enum macsec_offload nla_get_offload(const struct nlattr *nla) |
1499 | { | |
1500 | return (__force enum macsec_offload)nla_get_u8(nla); | |
1501 | } | |
1502 | ||
c09440f7 SD |
1503 | static sci_t nla_get_sci(const struct nlattr *nla) |
1504 | { | |
1505 | return (__force sci_t)nla_get_u64(nla); | |
1506 | } | |
1507 | ||
f60d94c0 ND |
1508 | static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
1509 | int padattr) | |
c09440f7 | 1510 | { |
f60d94c0 | 1511 | return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
c09440f7 SD |
1512 | } |
1513 | ||
48ef50fa EM |
1514 | static ssci_t nla_get_ssci(const struct nlattr *nla) |
1515 | { | |
1516 | return (__force ssci_t)nla_get_u32(nla); | |
1517 | } | |
1518 | ||
1519 | static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value) | |
1520 | { | |
1521 | return nla_put_u32(skb, attrtype, (__force u64)value); | |
1522 | } | |
1523 | ||
c09440f7 SD |
1524 | static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, |
1525 | struct nlattr **attrs, | |
1526 | struct nlattr **tb_sa, | |
1527 | struct net_device **devp, | |
1528 | struct macsec_secy **secyp, | |
1529 | struct macsec_tx_sc **scp, | |
1530 | u8 *assoc_num) | |
1531 | { | |
1532 | struct net_device *dev; | |
1533 | struct macsec_secy *secy; | |
1534 | struct macsec_tx_sc *tx_sc; | |
1535 | struct macsec_tx_sa *tx_sa; | |
1536 | ||
1537 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1538 | return ERR_PTR(-EINVAL); | |
1539 | ||
1540 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1541 | ||
1542 | dev = get_dev_from_nl(net, attrs); | |
1543 | if (IS_ERR(dev)) | |
1544 | return ERR_CAST(dev); | |
1545 | ||
1546 | if (*assoc_num >= MACSEC_NUM_AN) | |
1547 | return ERR_PTR(-EINVAL); | |
1548 | ||
1549 | secy = &macsec_priv(dev)->secy; | |
1550 | tx_sc = &secy->tx_sc; | |
1551 | ||
1552 | tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); | |
1553 | if (!tx_sa) | |
1554 | return ERR_PTR(-ENODEV); | |
1555 | ||
1556 | *devp = dev; | |
1557 | *scp = tx_sc; | |
1558 | *secyp = secy; | |
1559 | return tx_sa; | |
1560 | } | |
1561 | ||
1562 | static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, | |
1563 | struct nlattr **attrs, | |
1564 | struct nlattr **tb_rxsc, | |
1565 | struct net_device **devp, | |
1566 | struct macsec_secy **secyp) | |
1567 | { | |
1568 | struct net_device *dev; | |
1569 | struct macsec_secy *secy; | |
1570 | struct macsec_rx_sc *rx_sc; | |
1571 | sci_t sci; | |
1572 | ||
1573 | dev = get_dev_from_nl(net, attrs); | |
1574 | if (IS_ERR(dev)) | |
1575 | return ERR_CAST(dev); | |
1576 | ||
1577 | secy = &macsec_priv(dev)->secy; | |
1578 | ||
1579 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
1580 | return ERR_PTR(-EINVAL); | |
1581 | ||
1582 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
1583 | rx_sc = find_rx_sc_rtnl(secy, sci); | |
1584 | if (!rx_sc) | |
1585 | return ERR_PTR(-ENODEV); | |
1586 | ||
1587 | *secyp = secy; | |
1588 | *devp = dev; | |
1589 | ||
1590 | return rx_sc; | |
1591 | } | |
1592 | ||
1593 | static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, | |
1594 | struct nlattr **attrs, | |
1595 | struct nlattr **tb_rxsc, | |
1596 | struct nlattr **tb_sa, | |
1597 | struct net_device **devp, | |
1598 | struct macsec_secy **secyp, | |
1599 | struct macsec_rx_sc **scp, | |
1600 | u8 *assoc_num) | |
1601 | { | |
1602 | struct macsec_rx_sc *rx_sc; | |
1603 | struct macsec_rx_sa *rx_sa; | |
1604 | ||
1605 | if (!tb_sa[MACSEC_SA_ATTR_AN]) | |
1606 | return ERR_PTR(-EINVAL); | |
1607 | ||
1608 | *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1609 | if (*assoc_num >= MACSEC_NUM_AN) | |
1610 | return ERR_PTR(-EINVAL); | |
1611 | ||
1612 | rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); | |
1613 | if (IS_ERR(rx_sc)) | |
1614 | return ERR_CAST(rx_sc); | |
1615 | ||
1616 | rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); | |
1617 | if (!rx_sa) | |
1618 | return ERR_PTR(-ENODEV); | |
1619 | ||
1620 | *scp = rx_sc; | |
1621 | return rx_sa; | |
1622 | } | |
1623 | ||
c09440f7 SD |
1624 | static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { |
1625 | [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
1626 | [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, | |
1627 | [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, | |
dcb780fb | 1628 | [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED }, |
c09440f7 SD |
1629 | }; |
1630 | ||
1631 | static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { | |
1632 | [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, | |
1633 | [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
1634 | }; | |
1635 | ||
1636 | static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { | |
1637 | [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, | |
1638 | [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, | |
bc043585 | 1639 | [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4), |
8acca6ac SD |
1640 | [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
1641 | .len = MACSEC_KEYID_LEN, }, | |
c09440f7 | 1642 | [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
e8660ded | 1643 | .len = MACSEC_MAX_KEY_LEN, }, |
48ef50fa EM |
1644 | [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 }, |
1645 | [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY, | |
1646 | .len = MACSEC_SALT_LEN, }, | |
c09440f7 SD |
1647 | }; |
1648 | ||
dcb780fb AT |
1649 | static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = { |
1650 | [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 }, | |
1651 | }; | |
1652 | ||
3cf3227a AT |
1653 | /* Offloads an operation to a device driver */ |
1654 | static int macsec_offload(int (* const func)(struct macsec_context *), | |
1655 | struct macsec_context *ctx) | |
1656 | { | |
1657 | int ret; | |
1658 | ||
1659 | if (unlikely(!func)) | |
1660 | return 0; | |
1661 | ||
1662 | if (ctx->offload == MACSEC_OFFLOAD_PHY) | |
1663 | mutex_lock(&ctx->phydev->lock); | |
1664 | ||
3cf3227a | 1665 | ret = (*func)(ctx); |
3cf3227a | 1666 | |
3cf3227a AT |
1667 | if (ctx->offload == MACSEC_OFFLOAD_PHY) |
1668 | mutex_unlock(&ctx->phydev->lock); | |
1669 | ||
1670 | return ret; | |
1671 | } | |
1672 | ||
c09440f7 SD |
1673 | static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) |
1674 | { | |
1675 | if (!attrs[MACSEC_ATTR_SA_CONFIG]) | |
1676 | return -EINVAL; | |
1677 | ||
8cb08174 | 1678 | if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL)) |
c09440f7 SD |
1679 | return -EINVAL; |
1680 | ||
1681 | return 0; | |
1682 | } | |
1683 | ||
1684 | static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) | |
1685 | { | |
1686 | if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) | |
1687 | return -EINVAL; | |
1688 | ||
8cb08174 | 1689 | if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL)) |
c09440f7 SD |
1690 | return -EINVAL; |
1691 | ||
1692 | return 0; | |
1693 | } | |
1694 | ||
1695 | static bool validate_add_rxsa(struct nlattr **attrs) | |
1696 | { | |
1697 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1698 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1699 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1700 | return false; | |
1701 | ||
1702 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1703 | return false; | |
1704 | ||
48ef50fa | 1705 | if (attrs[MACSEC_SA_ATTR_PN] && |
c630d1fe | 1706 | nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
1707 | return false; |
1708 | ||
1709 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1710 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1711 | return false; | |
1712 | } | |
1713 | ||
8acca6ac SD |
1714 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1715 | return false; | |
1716 | ||
c09440f7 SD |
1717 | return true; |
1718 | } | |
1719 | ||
1720 | static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) | |
1721 | { | |
1722 | struct net_device *dev; | |
1723 | struct nlattr **attrs = info->attrs; | |
1724 | struct macsec_secy *secy; | |
1725 | struct macsec_rx_sc *rx_sc; | |
1726 | struct macsec_rx_sa *rx_sa; | |
1727 | unsigned char assoc_num; | |
48ef50fa | 1728 | int pn_len; |
c09440f7 SD |
1729 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
1730 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
34aedfee | 1731 | int err; |
c09440f7 SD |
1732 | |
1733 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1734 | return -EINVAL; | |
1735 | ||
1736 | if (parse_sa_config(attrs, tb_sa)) | |
1737 | return -EINVAL; | |
1738 | ||
1739 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1740 | return -EINVAL; | |
1741 | ||
1742 | if (!validate_add_rxsa(tb_sa)) | |
1743 | return -EINVAL; | |
1744 | ||
1745 | rtnl_lock(); | |
1746 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
36b232c8 | 1747 | if (IS_ERR(rx_sc)) { |
c09440f7 SD |
1748 | rtnl_unlock(); |
1749 | return PTR_ERR(rx_sc); | |
1750 | } | |
1751 | ||
1752 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1753 | ||
1754 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1755 | pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", | |
1756 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
1757 | rtnl_unlock(); | |
1758 | return -EINVAL; | |
1759 | } | |
1760 | ||
48ef50fa | 1761 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
f46040ee SD |
1762 | if (tb_sa[MACSEC_SA_ATTR_PN] && |
1763 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
48ef50fa EM |
1764 | pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n", |
1765 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
1766 | rtnl_unlock(); | |
1767 | return -EINVAL; | |
1768 | } | |
1769 | ||
1770 | if (secy->xpn) { | |
1771 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { | |
1772 | rtnl_unlock(); | |
1773 | return -EINVAL; | |
1774 | } | |
1775 | ||
1776 | if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { | |
1777 | pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n", | |
1778 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), | |
3240eac4 | 1779 | MACSEC_SALT_LEN); |
48ef50fa EM |
1780 | rtnl_unlock(); |
1781 | return -EINVAL; | |
1782 | } | |
1783 | } | |
1784 | ||
c09440f7 SD |
1785 | rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); |
1786 | if (rx_sa) { | |
1787 | rtnl_unlock(); | |
1788 | return -EBUSY; | |
1789 | } | |
1790 | ||
1791 | rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); | |
34aedfee | 1792 | if (!rx_sa) { |
c09440f7 SD |
1793 | rtnl_unlock(); |
1794 | return -ENOMEM; | |
1795 | } | |
1796 | ||
34aedfee DC |
1797 | err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1798 | secy->key_len, secy->icv_len); | |
1799 | if (err < 0) { | |
1800 | kfree(rx_sa); | |
1801 | rtnl_unlock(); | |
1802 | return err; | |
1803 | } | |
1804 | ||
c09440f7 SD |
1805 | if (tb_sa[MACSEC_SA_ATTR_PN]) { |
1806 | spin_lock_bh(&rx_sa->lock); | |
48ef50fa | 1807 | rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
1808 | spin_unlock_bh(&rx_sa->lock); |
1809 | } | |
1810 | ||
1811 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
1812 | rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
1813 | ||
c09440f7 | 1814 | rx_sa->sc = rx_sc; |
3cf3227a | 1815 | |
0a6e9b71 EH |
1816 | if (secy->xpn) { |
1817 | rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); | |
1818 | nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], | |
1819 | MACSEC_SALT_LEN); | |
1820 | } | |
1821 | ||
3cf3227a AT |
1822 | /* If h/w offloading is available, propagate to the device */ |
1823 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
1824 | const struct macsec_ops *ops; | |
1825 | struct macsec_context ctx; | |
1826 | ||
1827 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1828 | if (!ops) { | |
1829 | err = -EOPNOTSUPP; | |
1830 | goto cleanup; | |
1831 | } | |
1832 | ||
1833 | ctx.sa.assoc_num = assoc_num; | |
1834 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 1835 | ctx.secy = secy; |
3cf3227a | 1836 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1f7fe512 | 1837 | secy->key_len); |
3cf3227a AT |
1838 | |
1839 | err = macsec_offload(ops->mdo_add_rxsa, &ctx); | |
aaab73f8 | 1840 | memzero_explicit(ctx.sa.key, secy->key_len); |
3cf3227a AT |
1841 | if (err) |
1842 | goto cleanup; | |
1843 | } | |
1844 | ||
1845 | nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); | |
c09440f7 SD |
1846 | rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); |
1847 | ||
1848 | rtnl_unlock(); | |
1849 | ||
1850 | return 0; | |
3cf3227a AT |
1851 | |
1852 | cleanup: | |
c7b205fb | 1853 | macsec_rxsa_put(rx_sa); |
3cf3227a AT |
1854 | rtnl_unlock(); |
1855 | return err; | |
c09440f7 SD |
1856 | } |
1857 | ||
1858 | static bool validate_add_rxsc(struct nlattr **attrs) | |
1859 | { | |
1860 | if (!attrs[MACSEC_RXSC_ATTR_SCI]) | |
1861 | return false; | |
1862 | ||
1863 | if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { | |
1864 | if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) | |
1865 | return false; | |
1866 | } | |
1867 | ||
1868 | return true; | |
1869 | } | |
1870 | ||
1871 | static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) | |
1872 | { | |
1873 | struct net_device *dev; | |
1874 | sci_t sci = MACSEC_UNDEF_SCI; | |
1875 | struct nlattr **attrs = info->attrs; | |
1876 | struct macsec_rx_sc *rx_sc; | |
1877 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
182879f8 | 1878 | struct macsec_secy *secy; |
73a4b31c | 1879 | bool active = true; |
3cf3227a | 1880 | int ret; |
c09440f7 SD |
1881 | |
1882 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1883 | return -EINVAL; | |
1884 | ||
1885 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
1886 | return -EINVAL; | |
1887 | ||
1888 | if (!validate_add_rxsc(tb_rxsc)) | |
1889 | return -EINVAL; | |
1890 | ||
1891 | rtnl_lock(); | |
1892 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1893 | if (IS_ERR(dev)) { | |
1894 | rtnl_unlock(); | |
1895 | return PTR_ERR(dev); | |
1896 | } | |
1897 | ||
182879f8 | 1898 | secy = &macsec_priv(dev)->secy; |
c09440f7 SD |
1899 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
1900 | ||
73a4b31c SD |
1901 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) |
1902 | active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
1903 | ||
1904 | rx_sc = create_rx_sc(dev, sci, active); | |
c09440f7 SD |
1905 | if (IS_ERR(rx_sc)) { |
1906 | rtnl_unlock(); | |
1907 | return PTR_ERR(rx_sc); | |
1908 | } | |
1909 | ||
3cf3227a AT |
1910 | if (macsec_is_offloaded(netdev_priv(dev))) { |
1911 | const struct macsec_ops *ops; | |
1912 | struct macsec_context ctx; | |
1913 | ||
1914 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
1915 | if (!ops) { | |
1916 | ret = -EOPNOTSUPP; | |
1917 | goto cleanup; | |
1918 | } | |
1919 | ||
1920 | ctx.rx_sc = rx_sc; | |
182879f8 | 1921 | ctx.secy = secy; |
3cf3227a AT |
1922 | |
1923 | ret = macsec_offload(ops->mdo_add_rxsc, &ctx); | |
1924 | if (ret) | |
1925 | goto cleanup; | |
1926 | } | |
1927 | ||
c09440f7 SD |
1928 | rtnl_unlock(); |
1929 | ||
1930 | return 0; | |
3cf3227a AT |
1931 | |
1932 | cleanup: | |
93a30947 SD |
1933 | del_rx_sc(secy, sci); |
1934 | free_rx_sc(rx_sc); | |
3cf3227a AT |
1935 | rtnl_unlock(); |
1936 | return ret; | |
c09440f7 SD |
1937 | } |
1938 | ||
1939 | static bool validate_add_txsa(struct nlattr **attrs) | |
1940 | { | |
1941 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
1942 | !attrs[MACSEC_SA_ATTR_PN] || | |
1943 | !attrs[MACSEC_SA_ATTR_KEY] || | |
1944 | !attrs[MACSEC_SA_ATTR_KEYID]) | |
1945 | return false; | |
1946 | ||
1947 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
1948 | return false; | |
1949 | ||
c630d1fe | 1950 | if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
1951 | return false; |
1952 | ||
1953 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
1954 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
1955 | return false; | |
1956 | } | |
1957 | ||
8acca6ac SD |
1958 | if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
1959 | return false; | |
1960 | ||
c09440f7 SD |
1961 | return true; |
1962 | } | |
1963 | ||
1964 | static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) | |
1965 | { | |
1966 | struct net_device *dev; | |
1967 | struct nlattr **attrs = info->attrs; | |
1968 | struct macsec_secy *secy; | |
1969 | struct macsec_tx_sc *tx_sc; | |
1970 | struct macsec_tx_sa *tx_sa; | |
1971 | unsigned char assoc_num; | |
48ef50fa | 1972 | int pn_len; |
c09440f7 | 1973 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
3cf3227a | 1974 | bool was_operational; |
34aedfee | 1975 | int err; |
c09440f7 SD |
1976 | |
1977 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
1978 | return -EINVAL; | |
1979 | ||
1980 | if (parse_sa_config(attrs, tb_sa)) | |
1981 | return -EINVAL; | |
1982 | ||
1983 | if (!validate_add_txsa(tb_sa)) | |
1984 | return -EINVAL; | |
1985 | ||
1986 | rtnl_lock(); | |
1987 | dev = get_dev_from_nl(genl_info_net(info), attrs); | |
1988 | if (IS_ERR(dev)) { | |
1989 | rtnl_unlock(); | |
1990 | return PTR_ERR(dev); | |
1991 | } | |
1992 | ||
1993 | secy = &macsec_priv(dev)->secy; | |
1994 | tx_sc = &secy->tx_sc; | |
1995 | ||
1996 | assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); | |
1997 | ||
1998 | if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { | |
1999 | pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", | |
2000 | nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); | |
2001 | rtnl_unlock(); | |
2002 | return -EINVAL; | |
2003 | } | |
2004 | ||
48ef50fa EM |
2005 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
2006 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2007 | pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n", | |
2008 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2009 | rtnl_unlock(); | |
2010 | return -EINVAL; | |
2011 | } | |
2012 | ||
2013 | if (secy->xpn) { | |
2014 | if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { | |
2015 | rtnl_unlock(); | |
2016 | return -EINVAL; | |
2017 | } | |
2018 | ||
2019 | if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { | |
2020 | pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n", | |
2021 | nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), | |
3240eac4 | 2022 | MACSEC_SALT_LEN); |
48ef50fa EM |
2023 | rtnl_unlock(); |
2024 | return -EINVAL; | |
2025 | } | |
2026 | } | |
2027 | ||
c09440f7 SD |
2028 | tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); |
2029 | if (tx_sa) { | |
2030 | rtnl_unlock(); | |
2031 | return -EBUSY; | |
2032 | } | |
2033 | ||
2034 | tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); | |
34aedfee | 2035 | if (!tx_sa) { |
c09440f7 SD |
2036 | rtnl_unlock(); |
2037 | return -ENOMEM; | |
2038 | } | |
2039 | ||
34aedfee DC |
2040 | err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
2041 | secy->key_len, secy->icv_len); | |
2042 | if (err < 0) { | |
2043 | kfree(tx_sa); | |
2044 | rtnl_unlock(); | |
2045 | return err; | |
2046 | } | |
2047 | ||
c09440f7 | 2048 | spin_lock_bh(&tx_sa->lock); |
48ef50fa | 2049 | tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2050 | spin_unlock_bh(&tx_sa->lock); |
2051 | ||
2052 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) | |
2053 | tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2054 | ||
3cf3227a | 2055 | was_operational = secy->operational; |
c09440f7 SD |
2056 | if (assoc_num == tx_sc->encoding_sa && tx_sa->active) |
2057 | secy->operational = true; | |
2058 | ||
0a6e9b71 EH |
2059 | if (secy->xpn) { |
2060 | tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); | |
2061 | nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], | |
2062 | MACSEC_SALT_LEN); | |
2063 | } | |
2064 | ||
3cf3227a AT |
2065 | /* If h/w offloading is available, propagate to the device */ |
2066 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2067 | const struct macsec_ops *ops; | |
2068 | struct macsec_context ctx; | |
2069 | ||
2070 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2071 | if (!ops) { | |
2072 | err = -EOPNOTSUPP; | |
2073 | goto cleanup; | |
2074 | } | |
2075 | ||
2076 | ctx.sa.assoc_num = assoc_num; | |
2077 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2078 | ctx.secy = secy; |
3cf3227a | 2079 | memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
1f7fe512 | 2080 | secy->key_len); |
3cf3227a AT |
2081 | |
2082 | err = macsec_offload(ops->mdo_add_txsa, &ctx); | |
aaab73f8 | 2083 | memzero_explicit(ctx.sa.key, secy->key_len); |
3cf3227a AT |
2084 | if (err) |
2085 | goto cleanup; | |
2086 | } | |
2087 | ||
2088 | nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); | |
c09440f7 SD |
2089 | rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); |
2090 | ||
2091 | rtnl_unlock(); | |
2092 | ||
2093 | return 0; | |
3cf3227a AT |
2094 | |
2095 | cleanup: | |
2096 | secy->operational = was_operational; | |
c7b205fb | 2097 | macsec_txsa_put(tx_sa); |
3cf3227a AT |
2098 | rtnl_unlock(); |
2099 | return err; | |
c09440f7 SD |
2100 | } |
2101 | ||
2102 | static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2103 | { | |
2104 | struct nlattr **attrs = info->attrs; | |
2105 | struct net_device *dev; | |
2106 | struct macsec_secy *secy; | |
2107 | struct macsec_rx_sc *rx_sc; | |
2108 | struct macsec_rx_sa *rx_sa; | |
2109 | u8 assoc_num; | |
2110 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2111 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2112 | int ret; |
c09440f7 SD |
2113 | |
2114 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2115 | return -EINVAL; | |
2116 | ||
2117 | if (parse_sa_config(attrs, tb_sa)) | |
2118 | return -EINVAL; | |
2119 | ||
2120 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2121 | return -EINVAL; | |
2122 | ||
2123 | rtnl_lock(); | |
2124 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2125 | &dev, &secy, &rx_sc, &assoc_num); | |
2126 | if (IS_ERR(rx_sa)) { | |
2127 | rtnl_unlock(); | |
2128 | return PTR_ERR(rx_sa); | |
2129 | } | |
2130 | ||
2131 | if (rx_sa->active) { | |
2132 | rtnl_unlock(); | |
2133 | return -EBUSY; | |
2134 | } | |
2135 | ||
3cf3227a AT |
2136 | /* If h/w offloading is available, propagate to the device */ |
2137 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2138 | const struct macsec_ops *ops; | |
2139 | struct macsec_context ctx; | |
2140 | ||
2141 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2142 | if (!ops) { | |
2143 | ret = -EOPNOTSUPP; | |
2144 | goto cleanup; | |
2145 | } | |
2146 | ||
2147 | ctx.sa.assoc_num = assoc_num; | |
2148 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 2149 | ctx.secy = secy; |
3cf3227a AT |
2150 | |
2151 | ret = macsec_offload(ops->mdo_del_rxsa, &ctx); | |
2152 | if (ret) | |
2153 | goto cleanup; | |
2154 | } | |
2155 | ||
c09440f7 SD |
2156 | RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); |
2157 | clear_rx_sa(rx_sa); | |
2158 | ||
2159 | rtnl_unlock(); | |
2160 | ||
2161 | return 0; | |
3cf3227a AT |
2162 | |
2163 | cleanup: | |
2164 | rtnl_unlock(); | |
2165 | return ret; | |
c09440f7 SD |
2166 | } |
2167 | ||
2168 | static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2169 | { | |
2170 | struct nlattr **attrs = info->attrs; | |
2171 | struct net_device *dev; | |
2172 | struct macsec_secy *secy; | |
2173 | struct macsec_rx_sc *rx_sc; | |
2174 | sci_t sci; | |
2175 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a | 2176 | int ret; |
c09440f7 SD |
2177 | |
2178 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2179 | return -EINVAL; | |
2180 | ||
2181 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2182 | return -EINVAL; | |
2183 | ||
2184 | if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) | |
2185 | return -EINVAL; | |
2186 | ||
2187 | rtnl_lock(); | |
2188 | dev = get_dev_from_nl(genl_info_net(info), info->attrs); | |
2189 | if (IS_ERR(dev)) { | |
2190 | rtnl_unlock(); | |
2191 | return PTR_ERR(dev); | |
2192 | } | |
2193 | ||
2194 | secy = &macsec_priv(dev)->secy; | |
2195 | sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); | |
2196 | ||
2197 | rx_sc = del_rx_sc(secy, sci); | |
2198 | if (!rx_sc) { | |
2199 | rtnl_unlock(); | |
2200 | return -ENODEV; | |
2201 | } | |
2202 | ||
3cf3227a AT |
2203 | /* If h/w offloading is available, propagate to the device */ |
2204 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2205 | const struct macsec_ops *ops; | |
2206 | struct macsec_context ctx; | |
2207 | ||
2208 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2209 | if (!ops) { | |
2210 | ret = -EOPNOTSUPP; | |
2211 | goto cleanup; | |
2212 | } | |
2213 | ||
2214 | ctx.rx_sc = rx_sc; | |
182879f8 | 2215 | ctx.secy = secy; |
3cf3227a AT |
2216 | ret = macsec_offload(ops->mdo_del_rxsc, &ctx); |
2217 | if (ret) | |
2218 | goto cleanup; | |
2219 | } | |
2220 | ||
c09440f7 SD |
2221 | free_rx_sc(rx_sc); |
2222 | rtnl_unlock(); | |
2223 | ||
2224 | return 0; | |
3cf3227a AT |
2225 | |
2226 | cleanup: | |
2227 | rtnl_unlock(); | |
2228 | return ret; | |
c09440f7 SD |
2229 | } |
2230 | ||
2231 | static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) | |
2232 | { | |
2233 | struct nlattr **attrs = info->attrs; | |
2234 | struct net_device *dev; | |
2235 | struct macsec_secy *secy; | |
2236 | struct macsec_tx_sc *tx_sc; | |
2237 | struct macsec_tx_sa *tx_sa; | |
2238 | u8 assoc_num; | |
2239 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2240 | int ret; |
c09440f7 SD |
2241 | |
2242 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2243 | return -EINVAL; | |
2244 | ||
2245 | if (parse_sa_config(attrs, tb_sa)) | |
2246 | return -EINVAL; | |
2247 | ||
2248 | rtnl_lock(); | |
2249 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2250 | &dev, &secy, &tx_sc, &assoc_num); | |
2251 | if (IS_ERR(tx_sa)) { | |
2252 | rtnl_unlock(); | |
2253 | return PTR_ERR(tx_sa); | |
2254 | } | |
2255 | ||
2256 | if (tx_sa->active) { | |
2257 | rtnl_unlock(); | |
2258 | return -EBUSY; | |
2259 | } | |
2260 | ||
3cf3227a AT |
2261 | /* If h/w offloading is available, propagate to the device */ |
2262 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2263 | const struct macsec_ops *ops; | |
2264 | struct macsec_context ctx; | |
2265 | ||
2266 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2267 | if (!ops) { | |
2268 | ret = -EOPNOTSUPP; | |
2269 | goto cleanup; | |
2270 | } | |
2271 | ||
2272 | ctx.sa.assoc_num = assoc_num; | |
2273 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2274 | ctx.secy = secy; |
3cf3227a AT |
2275 | |
2276 | ret = macsec_offload(ops->mdo_del_txsa, &ctx); | |
2277 | if (ret) | |
2278 | goto cleanup; | |
2279 | } | |
2280 | ||
c09440f7 SD |
2281 | RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); |
2282 | clear_tx_sa(tx_sa); | |
2283 | ||
2284 | rtnl_unlock(); | |
2285 | ||
2286 | return 0; | |
3cf3227a AT |
2287 | |
2288 | cleanup: | |
2289 | rtnl_unlock(); | |
2290 | return ret; | |
c09440f7 SD |
2291 | } |
2292 | ||
2293 | static bool validate_upd_sa(struct nlattr **attrs) | |
2294 | { | |
2295 | if (!attrs[MACSEC_SA_ATTR_AN] || | |
2296 | attrs[MACSEC_SA_ATTR_KEY] || | |
48ef50fa EM |
2297 | attrs[MACSEC_SA_ATTR_KEYID] || |
2298 | attrs[MACSEC_SA_ATTR_SSCI] || | |
2299 | attrs[MACSEC_SA_ATTR_SALT]) | |
c09440f7 SD |
2300 | return false; |
2301 | ||
2302 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) | |
2303 | return false; | |
2304 | ||
c630d1fe | 2305 | if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
c09440f7 SD |
2306 | return false; |
2307 | ||
2308 | if (attrs[MACSEC_SA_ATTR_ACTIVE]) { | |
2309 | if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) | |
2310 | return false; | |
2311 | } | |
2312 | ||
2313 | return true; | |
2314 | } | |
2315 | ||
2316 | static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) | |
2317 | { | |
2318 | struct nlattr **attrs = info->attrs; | |
2319 | struct net_device *dev; | |
2320 | struct macsec_secy *secy; | |
2321 | struct macsec_tx_sc *tx_sc; | |
2322 | struct macsec_tx_sa *tx_sa; | |
2323 | u8 assoc_num; | |
2324 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2325 | bool was_operational, was_active; |
a21ecf0e | 2326 | pn_t prev_pn; |
3cf3227a | 2327 | int ret = 0; |
c09440f7 | 2328 | |
a21ecf0e EM |
2329 | prev_pn.full64 = 0; |
2330 | ||
c09440f7 SD |
2331 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2332 | return -EINVAL; | |
2333 | ||
2334 | if (parse_sa_config(attrs, tb_sa)) | |
2335 | return -EINVAL; | |
2336 | ||
2337 | if (!validate_upd_sa(tb_sa)) | |
2338 | return -EINVAL; | |
2339 | ||
2340 | rtnl_lock(); | |
2341 | tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, | |
2342 | &dev, &secy, &tx_sc, &assoc_num); | |
2343 | if (IS_ERR(tx_sa)) { | |
2344 | rtnl_unlock(); | |
2345 | return PTR_ERR(tx_sa); | |
2346 | } | |
2347 | ||
2348 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
48ef50fa EM |
2349 | int pn_len; |
2350 | ||
2351 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; | |
2352 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2353 | pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n", | |
2354 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2355 | rtnl_unlock(); | |
2356 | return -EINVAL; | |
2357 | } | |
2358 | ||
c09440f7 | 2359 | spin_lock_bh(&tx_sa->lock); |
a21ecf0e | 2360 | prev_pn = tx_sa->next_pn_halves; |
48ef50fa | 2361 | tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2362 | spin_unlock_bh(&tx_sa->lock); |
2363 | } | |
2364 | ||
3cf3227a | 2365 | was_active = tx_sa->active; |
c09440f7 SD |
2366 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2367 | tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2368 | ||
3cf3227a | 2369 | was_operational = secy->operational; |
c09440f7 SD |
2370 | if (assoc_num == tx_sc->encoding_sa) |
2371 | secy->operational = tx_sa->active; | |
2372 | ||
3cf3227a AT |
2373 | /* If h/w offloading is available, propagate to the device */ |
2374 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2375 | const struct macsec_ops *ops; | |
2376 | struct macsec_context ctx; | |
2377 | ||
2378 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2379 | if (!ops) { | |
2380 | ret = -EOPNOTSUPP; | |
2381 | goto cleanup; | |
2382 | } | |
2383 | ||
2384 | ctx.sa.assoc_num = assoc_num; | |
2385 | ctx.sa.tx_sa = tx_sa; | |
182879f8 | 2386 | ctx.secy = secy; |
3cf3227a AT |
2387 | |
2388 | ret = macsec_offload(ops->mdo_upd_txsa, &ctx); | |
2389 | if (ret) | |
2390 | goto cleanup; | |
2391 | } | |
2392 | ||
c09440f7 SD |
2393 | rtnl_unlock(); |
2394 | ||
2395 | return 0; | |
3cf3227a AT |
2396 | |
2397 | cleanup: | |
2398 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2399 | spin_lock_bh(&tx_sa->lock); | |
a21ecf0e | 2400 | tx_sa->next_pn_halves = prev_pn; |
3cf3227a AT |
2401 | spin_unlock_bh(&tx_sa->lock); |
2402 | } | |
2403 | tx_sa->active = was_active; | |
2404 | secy->operational = was_operational; | |
2405 | rtnl_unlock(); | |
2406 | return ret; | |
c09440f7 SD |
2407 | } |
2408 | ||
2409 | static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) | |
2410 | { | |
2411 | struct nlattr **attrs = info->attrs; | |
2412 | struct net_device *dev; | |
2413 | struct macsec_secy *secy; | |
2414 | struct macsec_rx_sc *rx_sc; | |
2415 | struct macsec_rx_sa *rx_sa; | |
2416 | u8 assoc_num; | |
2417 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
2418 | struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; | |
3cf3227a | 2419 | bool was_active; |
a21ecf0e | 2420 | pn_t prev_pn; |
3cf3227a | 2421 | int ret = 0; |
c09440f7 | 2422 | |
a21ecf0e EM |
2423 | prev_pn.full64 = 0; |
2424 | ||
c09440f7 SD |
2425 | if (!attrs[MACSEC_ATTR_IFINDEX]) |
2426 | return -EINVAL; | |
2427 | ||
2428 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2429 | return -EINVAL; | |
2430 | ||
2431 | if (parse_sa_config(attrs, tb_sa)) | |
2432 | return -EINVAL; | |
2433 | ||
2434 | if (!validate_upd_sa(tb_sa)) | |
2435 | return -EINVAL; | |
2436 | ||
2437 | rtnl_lock(); | |
2438 | rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, | |
2439 | &dev, &secy, &rx_sc, &assoc_num); | |
2440 | if (IS_ERR(rx_sa)) { | |
2441 | rtnl_unlock(); | |
2442 | return PTR_ERR(rx_sa); | |
2443 | } | |
2444 | ||
2445 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
48ef50fa EM |
2446 | int pn_len; |
2447 | ||
2448 | pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; | |
2449 | if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { | |
2450 | pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n", | |
2451 | nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); | |
2452 | rtnl_unlock(); | |
2453 | return -EINVAL; | |
2454 | } | |
2455 | ||
c09440f7 | 2456 | spin_lock_bh(&rx_sa->lock); |
a21ecf0e | 2457 | prev_pn = rx_sa->next_pn_halves; |
48ef50fa | 2458 | rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
c09440f7 SD |
2459 | spin_unlock_bh(&rx_sa->lock); |
2460 | } | |
2461 | ||
3cf3227a | 2462 | was_active = rx_sa->active; |
c09440f7 SD |
2463 | if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
2464 | rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); | |
2465 | ||
3cf3227a AT |
2466 | /* If h/w offloading is available, propagate to the device */ |
2467 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2468 | const struct macsec_ops *ops; | |
2469 | struct macsec_context ctx; | |
2470 | ||
2471 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2472 | if (!ops) { | |
2473 | ret = -EOPNOTSUPP; | |
2474 | goto cleanup; | |
2475 | } | |
2476 | ||
2477 | ctx.sa.assoc_num = assoc_num; | |
2478 | ctx.sa.rx_sa = rx_sa; | |
182879f8 | 2479 | ctx.secy = secy; |
3cf3227a AT |
2480 | |
2481 | ret = macsec_offload(ops->mdo_upd_rxsa, &ctx); | |
2482 | if (ret) | |
2483 | goto cleanup; | |
2484 | } | |
2485 | ||
c09440f7 SD |
2486 | rtnl_unlock(); |
2487 | return 0; | |
3cf3227a AT |
2488 | |
2489 | cleanup: | |
2490 | if (tb_sa[MACSEC_SA_ATTR_PN]) { | |
2491 | spin_lock_bh(&rx_sa->lock); | |
a21ecf0e | 2492 | rx_sa->next_pn_halves = prev_pn; |
3cf3227a AT |
2493 | spin_unlock_bh(&rx_sa->lock); |
2494 | } | |
2495 | rx_sa->active = was_active; | |
2496 | rtnl_unlock(); | |
2497 | return ret; | |
c09440f7 SD |
2498 | } |
2499 | ||
2500 | static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) | |
2501 | { | |
2502 | struct nlattr **attrs = info->attrs; | |
2503 | struct net_device *dev; | |
2504 | struct macsec_secy *secy; | |
2505 | struct macsec_rx_sc *rx_sc; | |
2506 | struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; | |
3cf3227a AT |
2507 | unsigned int prev_n_rx_sc; |
2508 | bool was_active; | |
2509 | int ret; | |
c09440f7 SD |
2510 | |
2511 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2512 | return -EINVAL; | |
2513 | ||
2514 | if (parse_rxsc_config(attrs, tb_rxsc)) | |
2515 | return -EINVAL; | |
2516 | ||
2517 | if (!validate_add_rxsc(tb_rxsc)) | |
2518 | return -EINVAL; | |
2519 | ||
2520 | rtnl_lock(); | |
2521 | rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); | |
2522 | if (IS_ERR(rx_sc)) { | |
2523 | rtnl_unlock(); | |
2524 | return PTR_ERR(rx_sc); | |
2525 | } | |
2526 | ||
3cf3227a AT |
2527 | was_active = rx_sc->active; |
2528 | prev_n_rx_sc = secy->n_rx_sc; | |
c09440f7 SD |
2529 | if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { |
2530 | bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); | |
2531 | ||
2532 | if (rx_sc->active != new) | |
2533 | secy->n_rx_sc += new ? 1 : -1; | |
2534 | ||
2535 | rx_sc->active = new; | |
2536 | } | |
2537 | ||
3cf3227a AT |
2538 | /* If h/w offloading is available, propagate to the device */ |
2539 | if (macsec_is_offloaded(netdev_priv(dev))) { | |
2540 | const struct macsec_ops *ops; | |
2541 | struct macsec_context ctx; | |
2542 | ||
2543 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
2544 | if (!ops) { | |
2545 | ret = -EOPNOTSUPP; | |
2546 | goto cleanup; | |
2547 | } | |
2548 | ||
2549 | ctx.rx_sc = rx_sc; | |
182879f8 | 2550 | ctx.secy = secy; |
3cf3227a AT |
2551 | |
2552 | ret = macsec_offload(ops->mdo_upd_rxsc, &ctx); | |
2553 | if (ret) | |
2554 | goto cleanup; | |
2555 | } | |
2556 | ||
c09440f7 SD |
2557 | rtnl_unlock(); |
2558 | ||
2559 | return 0; | |
3cf3227a AT |
2560 | |
2561 | cleanup: | |
2562 | secy->n_rx_sc = prev_n_rx_sc; | |
2563 | rx_sc->active = was_active; | |
2564 | rtnl_unlock(); | |
2565 | return ret; | |
c09440f7 SD |
2566 | } |
2567 | ||
dcb780fb AT |
2568 | static bool macsec_is_configured(struct macsec_dev *macsec) |
2569 | { | |
2570 | struct macsec_secy *secy = &macsec->secy; | |
2571 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
2572 | int i; | |
2573 | ||
80df4706 | 2574 | if (secy->rx_sc) |
dcb780fb AT |
2575 | return true; |
2576 | ||
2577 | for (i = 0; i < MACSEC_NUM_AN; i++) | |
2578 | if (tx_sc->sa[i]) | |
2579 | return true; | |
2580 | ||
2581 | return false; | |
2582 | } | |
2583 | ||
15f17355 EH |
2584 | static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload) |
2585 | { | |
2586 | enum macsec_offload prev_offload; | |
2587 | const struct macsec_ops *ops; | |
2588 | struct macsec_context ctx; | |
2589 | struct macsec_dev *macsec; | |
2590 | int ret = 0; | |
2591 | ||
2592 | macsec = macsec_priv(dev); | |
2593 | ||
2594 | /* Check if the offloading mode is supported by the underlying layers */ | |
2595 | if (offload != MACSEC_OFFLOAD_OFF && | |
2596 | !macsec_check_offload(offload, macsec)) | |
2597 | return -EOPNOTSUPP; | |
2598 | ||
2599 | /* Check if the net device is busy. */ | |
2600 | if (netif_running(dev)) | |
2601 | return -EBUSY; | |
2602 | ||
2603 | /* Check if the device already has rules configured: we do not support | |
2604 | * rules migration. | |
2605 | */ | |
2606 | if (macsec_is_configured(macsec)) | |
2607 | return -EBUSY; | |
2608 | ||
2609 | prev_offload = macsec->offload; | |
2610 | ||
2611 | ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload, | |
2612 | macsec, &ctx); | |
2613 | if (!ops) | |
2614 | return -EOPNOTSUPP; | |
2615 | ||
2616 | macsec->offload = offload; | |
2617 | ||
2618 | ctx.secy = &macsec->secy; | |
2619 | ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(ops->mdo_del_secy, &ctx) | |
2620 | : macsec_offload(ops->mdo_add_secy, &ctx); | |
2621 | if (ret) | |
2622 | macsec->offload = prev_offload; | |
2623 | ||
2624 | return ret; | |
2625 | } | |
2626 | ||
dcb780fb AT |
2627 | static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info) |
2628 | { | |
2629 | struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1]; | |
dcb780fb | 2630 | struct nlattr **attrs = info->attrs; |
15f17355 | 2631 | enum macsec_offload offload; |
dcb780fb | 2632 | struct macsec_dev *macsec; |
15f17355 | 2633 | struct net_device *dev; |
f3b4a00f | 2634 | int ret = 0; |
dcb780fb AT |
2635 | |
2636 | if (!attrs[MACSEC_ATTR_IFINDEX]) | |
2637 | return -EINVAL; | |
2638 | ||
2639 | if (!attrs[MACSEC_ATTR_OFFLOAD]) | |
2640 | return -EINVAL; | |
2641 | ||
2642 | if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX, | |
2643 | attrs[MACSEC_ATTR_OFFLOAD], | |
2644 | macsec_genl_offload_policy, NULL)) | |
2645 | return -EINVAL; | |
2646 | ||
f3b4a00f EH |
2647 | rtnl_lock(); |
2648 | ||
dcb780fb | 2649 | dev = get_dev_from_nl(genl_info_net(info), attrs); |
f3b4a00f EH |
2650 | if (IS_ERR(dev)) { |
2651 | ret = PTR_ERR(dev); | |
2652 | goto out; | |
2653 | } | |
dcb780fb AT |
2654 | macsec = macsec_priv(dev); |
2655 | ||
f3b4a00f EH |
2656 | if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) { |
2657 | ret = -EINVAL; | |
2658 | goto out; | |
2659 | } | |
aa81700c | 2660 | |
dcb780fb | 2661 | offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]); |
dcb780fb | 2662 | |
15f17355 EH |
2663 | if (macsec->offload != offload) |
2664 | ret = macsec_update_offload(dev, offload); | |
f3b4a00f | 2665 | out: |
dcb780fb AT |
2666 | rtnl_unlock(); |
2667 | return ret; | |
2668 | } | |
2669 | ||
b62c3624 DB |
2670 | static void get_tx_sa_stats(struct net_device *dev, int an, |
2671 | struct macsec_tx_sa *tx_sa, | |
2672 | struct macsec_tx_sa_stats *sum) | |
c09440f7 | 2673 | { |
b62c3624 | 2674 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2675 | int cpu; |
2676 | ||
b62c3624 DB |
2677 | /* If h/w offloading is available, propagate to the device */ |
2678 | if (macsec_is_offloaded(macsec)) { | |
2679 | const struct macsec_ops *ops; | |
2680 | struct macsec_context ctx; | |
2681 | ||
2682 | ops = macsec_get_ops(macsec, &ctx); | |
2683 | if (ops) { | |
2684 | ctx.sa.assoc_num = an; | |
2685 | ctx.sa.tx_sa = tx_sa; | |
2686 | ctx.stats.tx_sa_stats = sum; | |
2687 | ctx.secy = &macsec_priv(dev)->secy; | |
2688 | macsec_offload(ops->mdo_get_tx_sa_stats, &ctx); | |
2689 | } | |
2690 | return; | |
2691 | } | |
2692 | ||
c09440f7 | 2693 | for_each_possible_cpu(cpu) { |
b62c3624 DB |
2694 | const struct macsec_tx_sa_stats *stats = |
2695 | per_cpu_ptr(tx_sa->stats, cpu); | |
c09440f7 | 2696 | |
b62c3624 DB |
2697 | sum->OutPktsProtected += stats->OutPktsProtected; |
2698 | sum->OutPktsEncrypted += stats->OutPktsEncrypted; | |
c09440f7 | 2699 | } |
b62c3624 | 2700 | } |
c09440f7 | 2701 | |
b62c3624 DB |
2702 | static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum) |
2703 | { | |
2704 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, | |
2705 | sum->OutPktsProtected) || | |
2706 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
2707 | sum->OutPktsEncrypted)) | |
c09440f7 SD |
2708 | return -EMSGSIZE; |
2709 | ||
2710 | return 0; | |
2711 | } | |
2712 | ||
b62c3624 DB |
2713 | static void get_rx_sa_stats(struct net_device *dev, |
2714 | struct macsec_rx_sc *rx_sc, int an, | |
2715 | struct macsec_rx_sa *rx_sa, | |
2716 | struct macsec_rx_sa_stats *sum) | |
c09440f7 | 2717 | { |
b62c3624 | 2718 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2719 | int cpu; |
2720 | ||
b62c3624 DB |
2721 | /* If h/w offloading is available, propagate to the device */ |
2722 | if (macsec_is_offloaded(macsec)) { | |
2723 | const struct macsec_ops *ops; | |
2724 | struct macsec_context ctx; | |
2725 | ||
2726 | ops = macsec_get_ops(macsec, &ctx); | |
2727 | if (ops) { | |
2728 | ctx.sa.assoc_num = an; | |
2729 | ctx.sa.rx_sa = rx_sa; | |
2730 | ctx.stats.rx_sa_stats = sum; | |
2731 | ctx.secy = &macsec_priv(dev)->secy; | |
2732 | ctx.rx_sc = rx_sc; | |
2733 | macsec_offload(ops->mdo_get_rx_sa_stats, &ctx); | |
2734 | } | |
2735 | return; | |
2736 | } | |
2737 | ||
c09440f7 | 2738 | for_each_possible_cpu(cpu) { |
b62c3624 DB |
2739 | const struct macsec_rx_sa_stats *stats = |
2740 | per_cpu_ptr(rx_sa->stats, cpu); | |
c09440f7 | 2741 | |
b62c3624 DB |
2742 | sum->InPktsOK += stats->InPktsOK; |
2743 | sum->InPktsInvalid += stats->InPktsInvalid; | |
2744 | sum->InPktsNotValid += stats->InPktsNotValid; | |
2745 | sum->InPktsNotUsingSA += stats->InPktsNotUsingSA; | |
2746 | sum->InPktsUnusedSA += stats->InPktsUnusedSA; | |
c09440f7 | 2747 | } |
b62c3624 | 2748 | } |
c09440f7 | 2749 | |
b62c3624 DB |
2750 | static int copy_rx_sa_stats(struct sk_buff *skb, |
2751 | struct macsec_rx_sa_stats *sum) | |
2752 | { | |
2753 | if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) || | |
2754 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, | |
2755 | sum->InPktsInvalid) || | |
2756 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, | |
2757 | sum->InPktsNotValid) || | |
2758 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
2759 | sum->InPktsNotUsingSA) || | |
2760 | nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
2761 | sum->InPktsUnusedSA)) | |
c09440f7 SD |
2762 | return -EMSGSIZE; |
2763 | ||
2764 | return 0; | |
2765 | } | |
2766 | ||
b62c3624 DB |
2767 | static void get_rx_sc_stats(struct net_device *dev, |
2768 | struct macsec_rx_sc *rx_sc, | |
2769 | struct macsec_rx_sc_stats *sum) | |
c09440f7 | 2770 | { |
b62c3624 | 2771 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2772 | int cpu; |
2773 | ||
b62c3624 DB |
2774 | /* If h/w offloading is available, propagate to the device */ |
2775 | if (macsec_is_offloaded(macsec)) { | |
2776 | const struct macsec_ops *ops; | |
2777 | struct macsec_context ctx; | |
2778 | ||
2779 | ops = macsec_get_ops(macsec, &ctx); | |
2780 | if (ops) { | |
2781 | ctx.stats.rx_sc_stats = sum; | |
2782 | ctx.secy = &macsec_priv(dev)->secy; | |
2783 | ctx.rx_sc = rx_sc; | |
2784 | macsec_offload(ops->mdo_get_rx_sc_stats, &ctx); | |
2785 | } | |
2786 | return; | |
2787 | } | |
2788 | ||
c09440f7 SD |
2789 | for_each_possible_cpu(cpu) { |
2790 | const struct pcpu_rx_sc_stats *stats; | |
2791 | struct macsec_rx_sc_stats tmp; | |
2792 | unsigned int start; | |
2793 | ||
b62c3624 | 2794 | stats = per_cpu_ptr(rx_sc->stats, cpu); |
c09440f7 | 2795 | do { |
068c38ad | 2796 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2797 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2798 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2799 | |
b62c3624 DB |
2800 | sum->InOctetsValidated += tmp.InOctetsValidated; |
2801 | sum->InOctetsDecrypted += tmp.InOctetsDecrypted; | |
2802 | sum->InPktsUnchecked += tmp.InPktsUnchecked; | |
2803 | sum->InPktsDelayed += tmp.InPktsDelayed; | |
2804 | sum->InPktsOK += tmp.InPktsOK; | |
2805 | sum->InPktsInvalid += tmp.InPktsInvalid; | |
2806 | sum->InPktsLate += tmp.InPktsLate; | |
2807 | sum->InPktsNotValid += tmp.InPktsNotValid; | |
2808 | sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA; | |
2809 | sum->InPktsUnusedSA += tmp.InPktsUnusedSA; | |
c09440f7 | 2810 | } |
b62c3624 | 2811 | } |
c09440f7 | 2812 | |
b62c3624 DB |
2813 | static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum) |
2814 | { | |
f60d94c0 | 2815 | if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
b62c3624 | 2816 | sum->InOctetsValidated, |
f60d94c0 ND |
2817 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2818 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, | |
b62c3624 | 2819 | sum->InOctetsDecrypted, |
f60d94c0 ND |
2820 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2821 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, | |
b62c3624 | 2822 | sum->InPktsUnchecked, |
f60d94c0 ND |
2823 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2824 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, | |
b62c3624 | 2825 | sum->InPktsDelayed, |
f60d94c0 ND |
2826 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2827 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, | |
b62c3624 | 2828 | sum->InPktsOK, |
f60d94c0 ND |
2829 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2830 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, | |
b62c3624 | 2831 | sum->InPktsInvalid, |
f60d94c0 ND |
2832 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2833 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, | |
b62c3624 | 2834 | sum->InPktsLate, |
f60d94c0 ND |
2835 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2836 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, | |
b62c3624 | 2837 | sum->InPktsNotValid, |
f60d94c0 ND |
2838 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2839 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, | |
b62c3624 | 2840 | sum->InPktsNotUsingSA, |
f60d94c0 ND |
2841 | MACSEC_RXSC_STATS_ATTR_PAD) || |
2842 | nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, | |
b62c3624 | 2843 | sum->InPktsUnusedSA, |
f60d94c0 | 2844 | MACSEC_RXSC_STATS_ATTR_PAD)) |
c09440f7 SD |
2845 | return -EMSGSIZE; |
2846 | ||
2847 | return 0; | |
2848 | } | |
2849 | ||
b62c3624 DB |
2850 | static void get_tx_sc_stats(struct net_device *dev, |
2851 | struct macsec_tx_sc_stats *sum) | |
c09440f7 | 2852 | { |
b62c3624 | 2853 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2854 | int cpu; |
2855 | ||
b62c3624 DB |
2856 | /* If h/w offloading is available, propagate to the device */ |
2857 | if (macsec_is_offloaded(macsec)) { | |
2858 | const struct macsec_ops *ops; | |
2859 | struct macsec_context ctx; | |
2860 | ||
2861 | ops = macsec_get_ops(macsec, &ctx); | |
2862 | if (ops) { | |
2863 | ctx.stats.tx_sc_stats = sum; | |
2864 | ctx.secy = &macsec_priv(dev)->secy; | |
2865 | macsec_offload(ops->mdo_get_tx_sc_stats, &ctx); | |
2866 | } | |
2867 | return; | |
2868 | } | |
2869 | ||
c09440f7 SD |
2870 | for_each_possible_cpu(cpu) { |
2871 | const struct pcpu_tx_sc_stats *stats; | |
2872 | struct macsec_tx_sc_stats tmp; | |
2873 | unsigned int start; | |
2874 | ||
b62c3624 | 2875 | stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu); |
c09440f7 | 2876 | do { |
068c38ad | 2877 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2878 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2879 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2880 | |
b62c3624 DB |
2881 | sum->OutPktsProtected += tmp.OutPktsProtected; |
2882 | sum->OutPktsEncrypted += tmp.OutPktsEncrypted; | |
2883 | sum->OutOctetsProtected += tmp.OutOctetsProtected; | |
2884 | sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted; | |
c09440f7 | 2885 | } |
b62c3624 | 2886 | } |
c09440f7 | 2887 | |
b62c3624 DB |
2888 | static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum) |
2889 | { | |
f60d94c0 | 2890 | if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
b62c3624 | 2891 | sum->OutPktsProtected, |
f60d94c0 ND |
2892 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2893 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, | |
b62c3624 | 2894 | sum->OutPktsEncrypted, |
f60d94c0 ND |
2895 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2896 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, | |
b62c3624 | 2897 | sum->OutOctetsProtected, |
f60d94c0 ND |
2898 | MACSEC_TXSC_STATS_ATTR_PAD) || |
2899 | nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, | |
b62c3624 | 2900 | sum->OutOctetsEncrypted, |
f60d94c0 | 2901 | MACSEC_TXSC_STATS_ATTR_PAD)) |
c09440f7 SD |
2902 | return -EMSGSIZE; |
2903 | ||
2904 | return 0; | |
2905 | } | |
2906 | ||
b62c3624 | 2907 | static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum) |
c09440f7 | 2908 | { |
b62c3624 | 2909 | struct macsec_dev *macsec = macsec_priv(dev); |
c09440f7 SD |
2910 | int cpu; |
2911 | ||
b62c3624 DB |
2912 | /* If h/w offloading is available, propagate to the device */ |
2913 | if (macsec_is_offloaded(macsec)) { | |
2914 | const struct macsec_ops *ops; | |
2915 | struct macsec_context ctx; | |
2916 | ||
2917 | ops = macsec_get_ops(macsec, &ctx); | |
2918 | if (ops) { | |
2919 | ctx.stats.dev_stats = sum; | |
2920 | ctx.secy = &macsec_priv(dev)->secy; | |
2921 | macsec_offload(ops->mdo_get_dev_stats, &ctx); | |
2922 | } | |
2923 | return; | |
2924 | } | |
2925 | ||
c09440f7 SD |
2926 | for_each_possible_cpu(cpu) { |
2927 | const struct pcpu_secy_stats *stats; | |
2928 | struct macsec_dev_stats tmp; | |
2929 | unsigned int start; | |
2930 | ||
b62c3624 | 2931 | stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu); |
c09440f7 | 2932 | do { |
068c38ad | 2933 | start = u64_stats_fetch_begin(&stats->syncp); |
c09440f7 | 2934 | memcpy(&tmp, &stats->stats, sizeof(tmp)); |
068c38ad | 2935 | } while (u64_stats_fetch_retry(&stats->syncp, start)); |
c09440f7 | 2936 | |
b62c3624 DB |
2937 | sum->OutPktsUntagged += tmp.OutPktsUntagged; |
2938 | sum->InPktsUntagged += tmp.InPktsUntagged; | |
2939 | sum->OutPktsTooLong += tmp.OutPktsTooLong; | |
2940 | sum->InPktsNoTag += tmp.InPktsNoTag; | |
2941 | sum->InPktsBadTag += tmp.InPktsBadTag; | |
2942 | sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI; | |
2943 | sum->InPktsNoSCI += tmp.InPktsNoSCI; | |
2944 | sum->InPktsOverrun += tmp.InPktsOverrun; | |
c09440f7 | 2945 | } |
b62c3624 | 2946 | } |
c09440f7 | 2947 | |
b62c3624 DB |
2948 | static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum) |
2949 | { | |
f60d94c0 | 2950 | if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
b62c3624 | 2951 | sum->OutPktsUntagged, |
f60d94c0 ND |
2952 | MACSEC_SECY_STATS_ATTR_PAD) || |
2953 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, | |
b62c3624 | 2954 | sum->InPktsUntagged, |
f60d94c0 ND |
2955 | MACSEC_SECY_STATS_ATTR_PAD) || |
2956 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, | |
b62c3624 | 2957 | sum->OutPktsTooLong, |
f60d94c0 ND |
2958 | MACSEC_SECY_STATS_ATTR_PAD) || |
2959 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, | |
b62c3624 | 2960 | sum->InPktsNoTag, |
f60d94c0 ND |
2961 | MACSEC_SECY_STATS_ATTR_PAD) || |
2962 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, | |
b62c3624 | 2963 | sum->InPktsBadTag, |
f60d94c0 ND |
2964 | MACSEC_SECY_STATS_ATTR_PAD) || |
2965 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, | |
b62c3624 | 2966 | sum->InPktsUnknownSCI, |
f60d94c0 ND |
2967 | MACSEC_SECY_STATS_ATTR_PAD) || |
2968 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, | |
b62c3624 | 2969 | sum->InPktsNoSCI, |
f60d94c0 ND |
2970 | MACSEC_SECY_STATS_ATTR_PAD) || |
2971 | nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, | |
b62c3624 | 2972 | sum->InPktsOverrun, |
f60d94c0 | 2973 | MACSEC_SECY_STATS_ATTR_PAD)) |
c09440f7 SD |
2974 | return -EMSGSIZE; |
2975 | ||
2976 | return 0; | |
2977 | } | |
2978 | ||
2979 | static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) | |
2980 | { | |
2981 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; | |
ae0be8de MK |
2982 | struct nlattr *secy_nest = nla_nest_start_noflag(skb, |
2983 | MACSEC_ATTR_SECY); | |
ccfdec90 | 2984 | u64 csid; |
c09440f7 SD |
2985 | |
2986 | if (!secy_nest) | |
2987 | return 1; | |
2988 | ||
ccfdec90 FW |
2989 | switch (secy->key_len) { |
2990 | case MACSEC_GCM_AES_128_SAK_LEN: | |
48ef50fa | 2991 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
2992 | break; |
2993 | case MACSEC_GCM_AES_256_SAK_LEN: | |
48ef50fa | 2994 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
ccfdec90 FW |
2995 | break; |
2996 | default: | |
2997 | goto cancel; | |
2998 | } | |
2999 | ||
f60d94c0 ND |
3000 | if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
3001 | MACSEC_SECY_ATTR_PAD) || | |
3002 | nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, | |
ccfdec90 | 3003 | csid, MACSEC_SECY_ATTR_PAD) || |
c09440f7 SD |
3004 | nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
3005 | nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || | |
3006 | nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || | |
3007 | nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || | |
3008 | nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || | |
3009 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || | |
3010 | nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || | |
3011 | nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || | |
3012 | nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || | |
3013 | nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) | |
3014 | goto cancel; | |
3015 | ||
3016 | if (secy->replay_protect) { | |
3017 | if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) | |
3018 | goto cancel; | |
3019 | } | |
3020 | ||
3021 | nla_nest_end(skb, secy_nest); | |
3022 | return 0; | |
3023 | ||
3024 | cancel: | |
3025 | nla_nest_cancel(skb, secy_nest); | |
3026 | return 1; | |
3027 | } | |
3028 | ||
e1427237 FW |
3029 | static noinline_for_stack int |
3030 | dump_secy(struct macsec_secy *secy, struct net_device *dev, | |
3031 | struct sk_buff *skb, struct netlink_callback *cb) | |
c09440f7 | 3032 | { |
b62c3624 DB |
3033 | struct macsec_tx_sc_stats tx_sc_stats = {0, }; |
3034 | struct macsec_tx_sa_stats tx_sa_stats = {0, }; | |
3035 | struct macsec_rx_sc_stats rx_sc_stats = {0, }; | |
3036 | struct macsec_rx_sa_stats rx_sa_stats = {0, }; | |
dcb780fb | 3037 | struct macsec_dev *macsec = netdev_priv(dev); |
b62c3624 | 3038 | struct macsec_dev_stats dev_stats = {0, }; |
c09440f7 SD |
3039 | struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
3040 | struct nlattr *txsa_list, *rxsc_list; | |
dcb780fb | 3041 | struct macsec_rx_sc *rx_sc; |
c09440f7 | 3042 | struct nlattr *attr; |
dcb780fb AT |
3043 | void *hdr; |
3044 | int i, j; | |
c09440f7 SD |
3045 | |
3046 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
3047 | &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); | |
3048 | if (!hdr) | |
3049 | return -EMSGSIZE; | |
3050 | ||
0a833c29 | 3051 | genl_dump_check_consistent(cb, hdr); |
c09440f7 SD |
3052 | |
3053 | if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) | |
3054 | goto nla_put_failure; | |
3055 | ||
dcb780fb AT |
3056 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD); |
3057 | if (!attr) | |
3058 | goto nla_put_failure; | |
3059 | if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload)) | |
3060 | goto nla_put_failure; | |
3061 | nla_nest_end(skb, attr); | |
3062 | ||
c09440f7 SD |
3063 | if (nla_put_secy(secy, skb)) |
3064 | goto nla_put_failure; | |
3065 | ||
ae0be8de | 3066 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS); |
c09440f7 SD |
3067 | if (!attr) |
3068 | goto nla_put_failure; | |
b62c3624 DB |
3069 | |
3070 | get_tx_sc_stats(dev, &tx_sc_stats); | |
3071 | if (copy_tx_sc_stats(skb, &tx_sc_stats)) { | |
c09440f7 SD |
3072 | nla_nest_cancel(skb, attr); |
3073 | goto nla_put_failure; | |
3074 | } | |
3075 | nla_nest_end(skb, attr); | |
3076 | ||
ae0be8de | 3077 | attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS); |
c09440f7 SD |
3078 | if (!attr) |
3079 | goto nla_put_failure; | |
b62c3624 DB |
3080 | get_secy_stats(dev, &dev_stats); |
3081 | if (copy_secy_stats(skb, &dev_stats)) { | |
c09440f7 SD |
3082 | nla_nest_cancel(skb, attr); |
3083 | goto nla_put_failure; | |
3084 | } | |
3085 | nla_nest_end(skb, attr); | |
3086 | ||
ae0be8de | 3087 | txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST); |
c09440f7 SD |
3088 | if (!txsa_list) |
3089 | goto nla_put_failure; | |
3090 | for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { | |
3091 | struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); | |
3092 | struct nlattr *txsa_nest; | |
48ef50fa EM |
3093 | u64 pn; |
3094 | int pn_len; | |
c09440f7 SD |
3095 | |
3096 | if (!tx_sa) | |
3097 | continue; | |
3098 | ||
ae0be8de | 3099 | txsa_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
3100 | if (!txsa_nest) { |
3101 | nla_nest_cancel(skb, txsa_list); | |
3102 | goto nla_put_failure; | |
3103 | } | |
3104 | ||
b62c3624 DB |
3105 | attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS); |
3106 | if (!attr) { | |
3107 | nla_nest_cancel(skb, txsa_nest); | |
3108 | nla_nest_cancel(skb, txsa_list); | |
3109 | goto nla_put_failure; | |
3110 | } | |
3111 | memset(&tx_sa_stats, 0, sizeof(tx_sa_stats)); | |
3112 | get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats); | |
3113 | if (copy_tx_sa_stats(skb, &tx_sa_stats)) { | |
3114 | nla_nest_cancel(skb, attr); | |
3115 | nla_nest_cancel(skb, txsa_nest); | |
3116 | nla_nest_cancel(skb, txsa_list); | |
3117 | goto nla_put_failure; | |
3118 | } | |
3119 | nla_nest_end(skb, attr); | |
3120 | ||
48ef50fa EM |
3121 | if (secy->xpn) { |
3122 | pn = tx_sa->next_pn; | |
3123 | pn_len = MACSEC_XPN_PN_LEN; | |
3124 | } else { | |
3125 | pn = tx_sa->next_pn_halves.lower; | |
3126 | pn_len = MACSEC_DEFAULT_PN_LEN; | |
3127 | } | |
3128 | ||
c09440f7 | 3129 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
48ef50fa | 3130 | nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
8acca6ac | 3131 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
48ef50fa | 3132 | (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) || |
c09440f7 SD |
3133 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
3134 | nla_nest_cancel(skb, txsa_nest); | |
3135 | nla_nest_cancel(skb, txsa_list); | |
3136 | goto nla_put_failure; | |
3137 | } | |
3138 | ||
c09440f7 SD |
3139 | nla_nest_end(skb, txsa_nest); |
3140 | } | |
3141 | nla_nest_end(skb, txsa_list); | |
3142 | ||
ae0be8de | 3143 | rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST); |
c09440f7 SD |
3144 | if (!rxsc_list) |
3145 | goto nla_put_failure; | |
3146 | ||
3147 | j = 1; | |
3148 | for_each_rxsc_rtnl(secy, rx_sc) { | |
3149 | int k; | |
3150 | struct nlattr *rxsa_list; | |
ae0be8de | 3151 | struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++); |
c09440f7 SD |
3152 | |
3153 | if (!rxsc_nest) { | |
3154 | nla_nest_cancel(skb, rxsc_list); | |
3155 | goto nla_put_failure; | |
3156 | } | |
3157 | ||
3158 | if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || | |
f60d94c0 ND |
3159 | nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
3160 | MACSEC_RXSC_ATTR_PAD)) { | |
c09440f7 SD |
3161 | nla_nest_cancel(skb, rxsc_nest); |
3162 | nla_nest_cancel(skb, rxsc_list); | |
3163 | goto nla_put_failure; | |
3164 | } | |
3165 | ||
ae0be8de | 3166 | attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS); |
c09440f7 SD |
3167 | if (!attr) { |
3168 | nla_nest_cancel(skb, rxsc_nest); | |
3169 | nla_nest_cancel(skb, rxsc_list); | |
3170 | goto nla_put_failure; | |
3171 | } | |
b62c3624 DB |
3172 | memset(&rx_sc_stats, 0, sizeof(rx_sc_stats)); |
3173 | get_rx_sc_stats(dev, rx_sc, &rx_sc_stats); | |
3174 | if (copy_rx_sc_stats(skb, &rx_sc_stats)) { | |
c09440f7 SD |
3175 | nla_nest_cancel(skb, attr); |
3176 | nla_nest_cancel(skb, rxsc_nest); | |
3177 | nla_nest_cancel(skb, rxsc_list); | |
3178 | goto nla_put_failure; | |
3179 | } | |
3180 | nla_nest_end(skb, attr); | |
3181 | ||
ae0be8de MK |
3182 | rxsa_list = nla_nest_start_noflag(skb, |
3183 | MACSEC_RXSC_ATTR_SA_LIST); | |
c09440f7 SD |
3184 | if (!rxsa_list) { |
3185 | nla_nest_cancel(skb, rxsc_nest); | |
3186 | nla_nest_cancel(skb, rxsc_list); | |
3187 | goto nla_put_failure; | |
3188 | } | |
3189 | ||
3190 | for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { | |
3191 | struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); | |
3192 | struct nlattr *rxsa_nest; | |
48ef50fa EM |
3193 | u64 pn; |
3194 | int pn_len; | |
c09440f7 SD |
3195 | |
3196 | if (!rx_sa) | |
3197 | continue; | |
3198 | ||
ae0be8de | 3199 | rxsa_nest = nla_nest_start_noflag(skb, k++); |
c09440f7 SD |
3200 | if (!rxsa_nest) { |
3201 | nla_nest_cancel(skb, rxsa_list); | |
3202 | nla_nest_cancel(skb, rxsc_nest); | |
3203 | nla_nest_cancel(skb, rxsc_list); | |
3204 | goto nla_put_failure; | |
3205 | } | |
3206 | ||
ae0be8de MK |
3207 | attr = nla_nest_start_noflag(skb, |
3208 | MACSEC_SA_ATTR_STATS); | |
c09440f7 SD |
3209 | if (!attr) { |
3210 | nla_nest_cancel(skb, rxsa_list); | |
3211 | nla_nest_cancel(skb, rxsc_nest); | |
3212 | nla_nest_cancel(skb, rxsc_list); | |
3213 | goto nla_put_failure; | |
3214 | } | |
b62c3624 DB |
3215 | memset(&rx_sa_stats, 0, sizeof(rx_sa_stats)); |
3216 | get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats); | |
3217 | if (copy_rx_sa_stats(skb, &rx_sa_stats)) { | |
c09440f7 SD |
3218 | nla_nest_cancel(skb, attr); |
3219 | nla_nest_cancel(skb, rxsa_list); | |
3220 | nla_nest_cancel(skb, rxsc_nest); | |
3221 | nla_nest_cancel(skb, rxsc_list); | |
3222 | goto nla_put_failure; | |
3223 | } | |
3224 | nla_nest_end(skb, attr); | |
3225 | ||
48ef50fa EM |
3226 | if (secy->xpn) { |
3227 | pn = rx_sa->next_pn; | |
3228 | pn_len = MACSEC_XPN_PN_LEN; | |
3229 | } else { | |
3230 | pn = rx_sa->next_pn_halves.lower; | |
3231 | pn_len = MACSEC_DEFAULT_PN_LEN; | |
3232 | } | |
3233 | ||
c09440f7 | 3234 | if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
48ef50fa | 3235 | nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
8acca6ac | 3236 | nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
48ef50fa | 3237 | (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) || |
c09440f7 SD |
3238 | nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
3239 | nla_nest_cancel(skb, rxsa_nest); | |
3240 | nla_nest_cancel(skb, rxsc_nest); | |
3241 | nla_nest_cancel(skb, rxsc_list); | |
3242 | goto nla_put_failure; | |
3243 | } | |
3244 | nla_nest_end(skb, rxsa_nest); | |
3245 | } | |
3246 | ||
3247 | nla_nest_end(skb, rxsa_list); | |
3248 | nla_nest_end(skb, rxsc_nest); | |
3249 | } | |
3250 | ||
3251 | nla_nest_end(skb, rxsc_list); | |
3252 | ||
c09440f7 SD |
3253 | genlmsg_end(skb, hdr); |
3254 | ||
3255 | return 0; | |
3256 | ||
3257 | nla_put_failure: | |
c09440f7 SD |
3258 | genlmsg_cancel(skb, hdr); |
3259 | return -EMSGSIZE; | |
3260 | } | |
3261 | ||
96cfc505 SD |
3262 | static int macsec_generation = 1; /* protected by RTNL */ |
3263 | ||
c09440f7 SD |
3264 | static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
3265 | { | |
3266 | struct net *net = sock_net(skb->sk); | |
3267 | struct net_device *dev; | |
3268 | int dev_idx, d; | |
3269 | ||
3270 | dev_idx = cb->args[0]; | |
3271 | ||
3272 | d = 0; | |
c10c63ea | 3273 | rtnl_lock(); |
96cfc505 SD |
3274 | |
3275 | cb->seq = macsec_generation; | |
3276 | ||
c09440f7 SD |
3277 | for_each_netdev(net, dev) { |
3278 | struct macsec_secy *secy; | |
3279 | ||
3280 | if (d < dev_idx) | |
3281 | goto next; | |
3282 | ||
3283 | if (!netif_is_macsec(dev)) | |
3284 | goto next; | |
3285 | ||
3286 | secy = &macsec_priv(dev)->secy; | |
3287 | if (dump_secy(secy, dev, skb, cb) < 0) | |
3288 | goto done; | |
3289 | next: | |
3290 | d++; | |
3291 | } | |
3292 | ||
3293 | done: | |
c10c63ea | 3294 | rtnl_unlock(); |
c09440f7 SD |
3295 | cb->args[0] = d; |
3296 | return skb->len; | |
3297 | } | |
3298 | ||
66a9b928 | 3299 | static const struct genl_small_ops macsec_genl_ops[] = { |
c09440f7 SD |
3300 | { |
3301 | .cmd = MACSEC_CMD_GET_TXSC, | |
ef6243ac | 3302 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3303 | .dumpit = macsec_dump_txsc, |
c09440f7 SD |
3304 | }, |
3305 | { | |
3306 | .cmd = MACSEC_CMD_ADD_RXSC, | |
ef6243ac | 3307 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3308 | .doit = macsec_add_rxsc, |
c09440f7 SD |
3309 | .flags = GENL_ADMIN_PERM, |
3310 | }, | |
3311 | { | |
3312 | .cmd = MACSEC_CMD_DEL_RXSC, | |
ef6243ac | 3313 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3314 | .doit = macsec_del_rxsc, |
c09440f7 SD |
3315 | .flags = GENL_ADMIN_PERM, |
3316 | }, | |
3317 | { | |
3318 | .cmd = MACSEC_CMD_UPD_RXSC, | |
ef6243ac | 3319 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3320 | .doit = macsec_upd_rxsc, |
c09440f7 SD |
3321 | .flags = GENL_ADMIN_PERM, |
3322 | }, | |
3323 | { | |
3324 | .cmd = MACSEC_CMD_ADD_TXSA, | |
ef6243ac | 3325 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3326 | .doit = macsec_add_txsa, |
c09440f7 SD |
3327 | .flags = GENL_ADMIN_PERM, |
3328 | }, | |
3329 | { | |
3330 | .cmd = MACSEC_CMD_DEL_TXSA, | |
ef6243ac | 3331 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3332 | .doit = macsec_del_txsa, |
c09440f7 SD |
3333 | .flags = GENL_ADMIN_PERM, |
3334 | }, | |
3335 | { | |
3336 | .cmd = MACSEC_CMD_UPD_TXSA, | |
ef6243ac | 3337 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3338 | .doit = macsec_upd_txsa, |
c09440f7 SD |
3339 | .flags = GENL_ADMIN_PERM, |
3340 | }, | |
3341 | { | |
3342 | .cmd = MACSEC_CMD_ADD_RXSA, | |
ef6243ac | 3343 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3344 | .doit = macsec_add_rxsa, |
c09440f7 SD |
3345 | .flags = GENL_ADMIN_PERM, |
3346 | }, | |
3347 | { | |
3348 | .cmd = MACSEC_CMD_DEL_RXSA, | |
ef6243ac | 3349 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3350 | .doit = macsec_del_rxsa, |
c09440f7 SD |
3351 | .flags = GENL_ADMIN_PERM, |
3352 | }, | |
3353 | { | |
3354 | .cmd = MACSEC_CMD_UPD_RXSA, | |
ef6243ac | 3355 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
c09440f7 | 3356 | .doit = macsec_upd_rxsa, |
c09440f7 SD |
3357 | .flags = GENL_ADMIN_PERM, |
3358 | }, | |
dcb780fb AT |
3359 | { |
3360 | .cmd = MACSEC_CMD_UPD_OFFLOAD, | |
3361 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
3362 | .doit = macsec_upd_offload, | |
3363 | .flags = GENL_ADMIN_PERM, | |
3364 | }, | |
c09440f7 SD |
3365 | }; |
3366 | ||
56989f6d | 3367 | static struct genl_family macsec_fam __ro_after_init = { |
489111e5 JB |
3368 | .name = MACSEC_GENL_NAME, |
3369 | .hdrsize = 0, | |
3370 | .version = MACSEC_GENL_VERSION, | |
3371 | .maxattr = MACSEC_ATTR_MAX, | |
3b0f31f2 | 3372 | .policy = macsec_genl_policy, |
489111e5 JB |
3373 | .netnsok = true, |
3374 | .module = THIS_MODULE, | |
66a9b928 JK |
3375 | .small_ops = macsec_genl_ops, |
3376 | .n_small_ops = ARRAY_SIZE(macsec_genl_ops), | |
9c5d03d3 | 3377 | .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1, |
489111e5 JB |
3378 | }; |
3379 | ||
c09440f7 SD |
3380 | static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
3381 | struct net_device *dev) | |
3382 | { | |
3383 | struct macsec_dev *macsec = netdev_priv(dev); | |
3384 | struct macsec_secy *secy = &macsec->secy; | |
3385 | struct pcpu_secy_stats *secy_stats; | |
3386 | int ret, len; | |
3387 | ||
3cf3227a | 3388 | if (macsec_is_offloaded(netdev_priv(dev))) { |
0a28bfd4 LN |
3389 | struct metadata_dst *md_dst = secy->tx_sc.md_dst; |
3390 | ||
3391 | skb_dst_drop(skb); | |
3392 | dst_hold(&md_dst->dst); | |
3393 | skb_dst_set(skb, &md_dst->dst); | |
3cf3227a AT |
3394 | skb->dev = macsec->real_dev; |
3395 | return dev_queue_xmit(skb); | |
3396 | } | |
3397 | ||
c09440f7 SD |
3398 | /* 10.5 */ |
3399 | if (!secy->protect_frames) { | |
3400 | secy_stats = this_cpu_ptr(macsec->stats); | |
3401 | u64_stats_update_begin(&secy_stats->syncp); | |
3402 | secy_stats->stats.OutPktsUntagged++; | |
3403 | u64_stats_update_end(&secy_stats->syncp); | |
79c62220 | 3404 | skb->dev = macsec->real_dev; |
c09440f7 SD |
3405 | len = skb->len; |
3406 | ret = dev_queue_xmit(skb); | |
3407 | count_tx(dev, ret, len); | |
3408 | return ret; | |
3409 | } | |
3410 | ||
3411 | if (!secy->operational) { | |
3412 | kfree_skb(skb); | |
32d0a49d | 3413 | DEV_STATS_INC(dev, tx_dropped); |
c09440f7 SD |
3414 | return NETDEV_TX_OK; |
3415 | } | |
3416 | ||
91ec9bd5 | 3417 | len = skb->len; |
c09440f7 SD |
3418 | skb = macsec_encrypt(skb, dev); |
3419 | if (IS_ERR(skb)) { | |
3420 | if (PTR_ERR(skb) != -EINPROGRESS) | |
32d0a49d | 3421 | DEV_STATS_INC(dev, tx_dropped); |
c09440f7 SD |
3422 | return NETDEV_TX_OK; |
3423 | } | |
3424 | ||
3425 | macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); | |
3426 | ||
3427 | macsec_encrypt_finish(skb, dev); | |
c09440f7 SD |
3428 | ret = dev_queue_xmit(skb); |
3429 | count_tx(dev, ret, len); | |
3430 | return ret; | |
3431 | } | |
3432 | ||
8bcd560a | 3433 | #define MACSEC_FEATURES \ |
c09440f7 | 3434 | (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) |
e2003872 | 3435 | |
c09440f7 SD |
3436 | static int macsec_dev_init(struct net_device *dev) |
3437 | { | |
3438 | struct macsec_dev *macsec = macsec_priv(dev); | |
3439 | struct net_device *real_dev = macsec->real_dev; | |
5491e7c6 | 3440 | int err; |
c09440f7 SD |
3441 | |
3442 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
3443 | if (!dev->tstats) | |
3444 | return -ENOMEM; | |
3445 | ||
5491e7c6 PA |
3446 | err = gro_cells_init(&macsec->gro_cells, dev); |
3447 | if (err) { | |
3448 | free_percpu(dev->tstats); | |
3449 | return err; | |
3450 | } | |
3451 | ||
8bcd560a SD |
3452 | dev->features = real_dev->features & MACSEC_FEATURES; |
3453 | dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; | |
c09440f7 SD |
3454 | |
3455 | dev->needed_headroom = real_dev->needed_headroom + | |
3456 | MACSEC_NEEDED_HEADROOM; | |
3457 | dev->needed_tailroom = real_dev->needed_tailroom + | |
3458 | MACSEC_NEEDED_TAILROOM; | |
3459 | ||
3460 | if (is_zero_ether_addr(dev->dev_addr)) | |
3461 | eth_hw_addr_inherit(dev, real_dev); | |
3462 | if (is_zero_ether_addr(dev->broadcast)) | |
3463 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
3464 | ||
196a888c | 3465 | /* Get macsec's reference to real_dev */ |
d62607c3 | 3466 | netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL); |
196a888c | 3467 | |
c09440f7 SD |
3468 | return 0; |
3469 | } | |
3470 | ||
3471 | static void macsec_dev_uninit(struct net_device *dev) | |
3472 | { | |
5491e7c6 PA |
3473 | struct macsec_dev *macsec = macsec_priv(dev); |
3474 | ||
3475 | gro_cells_destroy(&macsec->gro_cells); | |
c09440f7 SD |
3476 | free_percpu(dev->tstats); |
3477 | } | |
3478 | ||
3479 | static netdev_features_t macsec_fix_features(struct net_device *dev, | |
3480 | netdev_features_t features) | |
3481 | { | |
3482 | struct macsec_dev *macsec = macsec_priv(dev); | |
3483 | struct net_device *real_dev = macsec->real_dev; | |
3484 | ||
8bcd560a | 3485 | features &= (real_dev->features & MACSEC_FEATURES) | |
5491e7c6 PA |
3486 | NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; |
3487 | features |= NETIF_F_LLTX; | |
c09440f7 SD |
3488 | |
3489 | return features; | |
3490 | } | |
3491 | ||
3492 | static int macsec_dev_open(struct net_device *dev) | |
3493 | { | |
3494 | struct macsec_dev *macsec = macsec_priv(dev); | |
3495 | struct net_device *real_dev = macsec->real_dev; | |
3496 | int err; | |
3497 | ||
c09440f7 SD |
3498 | err = dev_uc_add(real_dev, dev->dev_addr); |
3499 | if (err < 0) | |
3500 | return err; | |
3501 | ||
3502 | if (dev->flags & IFF_ALLMULTI) { | |
3503 | err = dev_set_allmulti(real_dev, 1); | |
3504 | if (err < 0) | |
3505 | goto del_unicast; | |
3506 | } | |
3507 | ||
3508 | if (dev->flags & IFF_PROMISC) { | |
3509 | err = dev_set_promiscuity(real_dev, 1); | |
3510 | if (err < 0) | |
3511 | goto clear_allmulti; | |
3512 | } | |
3513 | ||
3cf3227a AT |
3514 | /* If h/w offloading is available, propagate to the device */ |
3515 | if (macsec_is_offloaded(macsec)) { | |
3516 | const struct macsec_ops *ops; | |
3517 | struct macsec_context ctx; | |
3518 | ||
3519 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3520 | if (!ops) { | |
3521 | err = -EOPNOTSUPP; | |
3522 | goto clear_allmulti; | |
3523 | } | |
3524 | ||
182879f8 | 3525 | ctx.secy = &macsec->secy; |
3cf3227a AT |
3526 | err = macsec_offload(ops->mdo_dev_open, &ctx); |
3527 | if (err) | |
3528 | goto clear_allmulti; | |
3529 | } | |
3530 | ||
c09440f7 SD |
3531 | if (netif_carrier_ok(real_dev)) |
3532 | netif_carrier_on(dev); | |
3533 | ||
3534 | return 0; | |
3535 | clear_allmulti: | |
3536 | if (dev->flags & IFF_ALLMULTI) | |
3537 | dev_set_allmulti(real_dev, -1); | |
3538 | del_unicast: | |
3539 | dev_uc_del(real_dev, dev->dev_addr); | |
3540 | netif_carrier_off(dev); | |
3541 | return err; | |
3542 | } | |
3543 | ||
3544 | static int macsec_dev_stop(struct net_device *dev) | |
3545 | { | |
3546 | struct macsec_dev *macsec = macsec_priv(dev); | |
3547 | struct net_device *real_dev = macsec->real_dev; | |
3548 | ||
3549 | netif_carrier_off(dev); | |
3550 | ||
3cf3227a AT |
3551 | /* If h/w offloading is available, propagate to the device */ |
3552 | if (macsec_is_offloaded(macsec)) { | |
3553 | const struct macsec_ops *ops; | |
3554 | struct macsec_context ctx; | |
3555 | ||
3556 | ops = macsec_get_ops(macsec, &ctx); | |
182879f8 DB |
3557 | if (ops) { |
3558 | ctx.secy = &macsec->secy; | |
3cf3227a | 3559 | macsec_offload(ops->mdo_dev_stop, &ctx); |
182879f8 | 3560 | } |
3cf3227a AT |
3561 | } |
3562 | ||
c09440f7 SD |
3563 | dev_mc_unsync(real_dev, dev); |
3564 | dev_uc_unsync(real_dev, dev); | |
3565 | ||
3566 | if (dev->flags & IFF_ALLMULTI) | |
3567 | dev_set_allmulti(real_dev, -1); | |
3568 | ||
3569 | if (dev->flags & IFF_PROMISC) | |
3570 | dev_set_promiscuity(real_dev, -1); | |
3571 | ||
3572 | dev_uc_del(real_dev, dev->dev_addr); | |
3573 | ||
3574 | return 0; | |
3575 | } | |
3576 | ||
3577 | static void macsec_dev_change_rx_flags(struct net_device *dev, int change) | |
3578 | { | |
3579 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3580 | ||
3581 | if (!(dev->flags & IFF_UP)) | |
3582 | return; | |
3583 | ||
3584 | if (change & IFF_ALLMULTI) | |
3585 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3586 | ||
3587 | if (change & IFF_PROMISC) | |
3588 | dev_set_promiscuity(real_dev, | |
3589 | dev->flags & IFF_PROMISC ? 1 : -1); | |
3590 | } | |
3591 | ||
3592 | static void macsec_dev_set_rx_mode(struct net_device *dev) | |
3593 | { | |
3594 | struct net_device *real_dev = macsec_priv(dev)->real_dev; | |
3595 | ||
3596 | dev_mc_sync(real_dev, dev); | |
3597 | dev_uc_sync(real_dev, dev); | |
3598 | } | |
3599 | ||
3600 | static int macsec_set_mac_address(struct net_device *dev, void *p) | |
3601 | { | |
3602 | struct macsec_dev *macsec = macsec_priv(dev); | |
3603 | struct net_device *real_dev = macsec->real_dev; | |
3604 | struct sockaddr *addr = p; | |
3605 | int err; | |
3606 | ||
3607 | if (!is_valid_ether_addr(addr->sa_data)) | |
3608 | return -EADDRNOTAVAIL; | |
3609 | ||
3610 | if (!(dev->flags & IFF_UP)) | |
3611 | goto out; | |
3612 | ||
3613 | err = dev_uc_add(real_dev, addr->sa_data); | |
3614 | if (err < 0) | |
3615 | return err; | |
3616 | ||
3617 | dev_uc_del(real_dev, dev->dev_addr); | |
3618 | ||
3619 | out: | |
e35b8d7d | 3620 | eth_hw_addr_set(dev, addr->sa_data); |
09f4136c DB |
3621 | |
3622 | /* If h/w offloading is available, propagate to the device */ | |
3623 | if (macsec_is_offloaded(macsec)) { | |
3624 | const struct macsec_ops *ops; | |
3625 | struct macsec_context ctx; | |
3626 | ||
3627 | ops = macsec_get_ops(macsec, &ctx); | |
3628 | if (ops) { | |
3629 | ctx.secy = &macsec->secy; | |
3630 | macsec_offload(ops->mdo_upd_secy, &ctx); | |
3631 | } | |
3632 | } | |
3633 | ||
c09440f7 SD |
3634 | return 0; |
3635 | } | |
3636 | ||
3637 | static int macsec_change_mtu(struct net_device *dev, int new_mtu) | |
3638 | { | |
3639 | struct macsec_dev *macsec = macsec_priv(dev); | |
3640 | unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); | |
3641 | ||
3642 | if (macsec->real_dev->mtu - extra < new_mtu) | |
3643 | return -ERANGE; | |
3644 | ||
3645 | dev->mtu = new_mtu; | |
3646 | ||
3647 | return 0; | |
3648 | } | |
3649 | ||
bc1f4470 | 3650 | static void macsec_get_stats64(struct net_device *dev, |
3651 | struct rtnl_link_stats64 *s) | |
c09440f7 | 3652 | { |
c09440f7 | 3653 | if (!dev->tstats) |
bc1f4470 | 3654 | return; |
c09440f7 | 3655 | |
9d015167 | 3656 | dev_fetch_sw_netstats(s, dev->tstats); |
c09440f7 | 3657 | |
32d0a49d ED |
3658 | s->rx_dropped = atomic_long_read(&dev->stats.__rx_dropped); |
3659 | s->tx_dropped = atomic_long_read(&dev->stats.__tx_dropped); | |
3660 | s->rx_errors = atomic_long_read(&dev->stats.__rx_errors); | |
c09440f7 SD |
3661 | } |
3662 | ||
3663 | static int macsec_get_iflink(const struct net_device *dev) | |
3664 | { | |
3665 | return macsec_priv(dev)->real_dev->ifindex; | |
3666 | } | |
3667 | ||
3668 | static const struct net_device_ops macsec_netdev_ops = { | |
3669 | .ndo_init = macsec_dev_init, | |
3670 | .ndo_uninit = macsec_dev_uninit, | |
3671 | .ndo_open = macsec_dev_open, | |
3672 | .ndo_stop = macsec_dev_stop, | |
3673 | .ndo_fix_features = macsec_fix_features, | |
3674 | .ndo_change_mtu = macsec_change_mtu, | |
3675 | .ndo_set_rx_mode = macsec_dev_set_rx_mode, | |
3676 | .ndo_change_rx_flags = macsec_dev_change_rx_flags, | |
3677 | .ndo_set_mac_address = macsec_set_mac_address, | |
3678 | .ndo_start_xmit = macsec_start_xmit, | |
3679 | .ndo_get_stats64 = macsec_get_stats64, | |
3680 | .ndo_get_iflink = macsec_get_iflink, | |
3681 | }; | |
3682 | ||
3683 | static const struct device_type macsec_type = { | |
3684 | .name = "macsec", | |
3685 | }; | |
3686 | ||
3687 | static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { | |
3688 | [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, | |
31d9a1c5 | 3689 | [IFLA_MACSEC_PORT] = { .type = NLA_U16 }, |
c09440f7 SD |
3690 | [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, |
3691 | [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, | |
3692 | [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, | |
3693 | [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, | |
3694 | [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, | |
3695 | [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, | |
3696 | [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, | |
3697 | [IFLA_MACSEC_ES] = { .type = NLA_U8 }, | |
3698 | [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, | |
3699 | [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, | |
3700 | [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, | |
38099024 | 3701 | [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 }, |
c09440f7 SD |
3702 | }; |
3703 | ||
3704 | static void macsec_free_netdev(struct net_device *dev) | |
3705 | { | |
3706 | struct macsec_dev *macsec = macsec_priv(dev); | |
c09440f7 | 3707 | |
c52add61 SD |
3708 | if (macsec->secy.tx_sc.md_dst) |
3709 | metadata_dst_free(macsec->secy.tx_sc.md_dst); | |
c09440f7 SD |
3710 | free_percpu(macsec->stats); |
3711 | free_percpu(macsec->secy.tx_sc.stats); | |
3712 | ||
196a888c | 3713 | /* Get rid of the macsec's reference to real_dev */ |
d62607c3 | 3714 | netdev_put(macsec->real_dev, &macsec->dev_tracker); |
c09440f7 SD |
3715 | } |
3716 | ||
3717 | static void macsec_setup(struct net_device *dev) | |
3718 | { | |
3719 | ether_setup(dev); | |
91572088 JW |
3720 | dev->min_mtu = 0; |
3721 | dev->max_mtu = ETH_MAX_MTU; | |
e425974f | 3722 | dev->priv_flags |= IFF_NO_QUEUE; |
c09440f7 | 3723 | dev->netdev_ops = &macsec_netdev_ops; |
cf124db5 DM |
3724 | dev->needs_free_netdev = true; |
3725 | dev->priv_destructor = macsec_free_netdev; | |
c24acf03 | 3726 | SET_NETDEV_DEVTYPE(dev, &macsec_type); |
c09440f7 SD |
3727 | |
3728 | eth_zero_addr(dev->broadcast); | |
3729 | } | |
3730 | ||
ccfdec90 FW |
3731 | static int macsec_changelink_common(struct net_device *dev, |
3732 | struct nlattr *data[]) | |
c09440f7 SD |
3733 | { |
3734 | struct macsec_secy *secy; | |
3735 | struct macsec_tx_sc *tx_sc; | |
3736 | ||
3737 | secy = &macsec_priv(dev)->secy; | |
3738 | tx_sc = &secy->tx_sc; | |
3739 | ||
3740 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
3741 | struct macsec_tx_sa *tx_sa; | |
3742 | ||
3743 | tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); | |
3744 | tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); | |
3745 | ||
3746 | secy->operational = tx_sa && tx_sa->active; | |
3747 | } | |
3748 | ||
c09440f7 SD |
3749 | if (data[IFLA_MACSEC_ENCRYPT]) |
3750 | tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); | |
3751 | ||
3752 | if (data[IFLA_MACSEC_PROTECT]) | |
3753 | secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); | |
3754 | ||
3755 | if (data[IFLA_MACSEC_INC_SCI]) | |
3756 | tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
3757 | ||
3758 | if (data[IFLA_MACSEC_ES]) | |
3759 | tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); | |
3760 | ||
3761 | if (data[IFLA_MACSEC_SCB]) | |
3762 | tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); | |
3763 | ||
3764 | if (data[IFLA_MACSEC_REPLAY_PROTECT]) | |
3765 | secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); | |
3766 | ||
3767 | if (data[IFLA_MACSEC_VALIDATION]) | |
3768 | secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); | |
ccfdec90 FW |
3769 | |
3770 | if (data[IFLA_MACSEC_CIPHER_SUITE]) { | |
3771 | switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) { | |
3772 | case MACSEC_CIPHER_ID_GCM_AES_128: | |
e8660ded | 3773 | case MACSEC_DEFAULT_CIPHER_ID: |
ccfdec90 | 3774 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
48ef50fa | 3775 | secy->xpn = false; |
ccfdec90 FW |
3776 | break; |
3777 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
3778 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
48ef50fa EM |
3779 | secy->xpn = false; |
3780 | break; | |
3781 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: | |
3782 | secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; | |
3783 | secy->xpn = true; | |
3784 | break; | |
3785 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: | |
3786 | secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; | |
3787 | secy->xpn = true; | |
ccfdec90 FW |
3788 | break; |
3789 | default: | |
3790 | return -EINVAL; | |
3791 | } | |
3792 | } | |
3793 | ||
b07a0e20 SD |
3794 | if (data[IFLA_MACSEC_WINDOW]) { |
3795 | secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); | |
3796 | ||
3797 | /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window | |
3798 | * for XPN cipher suites */ | |
3799 | if (secy->xpn && | |
3800 | secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW) | |
3801 | return -EINVAL; | |
3802 | } | |
3803 | ||
ccfdec90 | 3804 | return 0; |
c09440f7 SD |
3805 | } |
3806 | ||
3807 | static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
3808 | struct nlattr *data[], |
3809 | struct netlink_ext_ack *extack) | |
c09440f7 | 3810 | { |
3cf3227a | 3811 | struct macsec_dev *macsec = macsec_priv(dev); |
15f17355 EH |
3812 | bool macsec_offload_state_change = false; |
3813 | enum macsec_offload offload; | |
022e9d60 | 3814 | struct macsec_tx_sc tx_sc; |
3cf3227a AT |
3815 | struct macsec_secy secy; |
3816 | int ret; | |
3817 | ||
c09440f7 SD |
3818 | if (!data) |
3819 | return 0; | |
3820 | ||
3821 | if (data[IFLA_MACSEC_CIPHER_SUITE] || | |
3822 | data[IFLA_MACSEC_ICV_LEN] || | |
3823 | data[IFLA_MACSEC_SCI] || | |
3824 | data[IFLA_MACSEC_PORT]) | |
3825 | return -EINVAL; | |
3826 | ||
3cf3227a AT |
3827 | /* Keep a copy of unmodified secy and tx_sc, in case the offload |
3828 | * propagation fails, to revert macsec_changelink_common. | |
3829 | */ | |
3830 | memcpy(&secy, &macsec->secy, sizeof(secy)); | |
3831 | memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc)); | |
3832 | ||
3833 | ret = macsec_changelink_common(dev, data); | |
3834 | if (ret) | |
b07a0e20 | 3835 | goto cleanup; |
3cf3227a | 3836 | |
15f17355 EH |
3837 | if (data[IFLA_MACSEC_OFFLOAD]) { |
3838 | offload = nla_get_u8(data[IFLA_MACSEC_OFFLOAD]); | |
3839 | if (macsec->offload != offload) { | |
3840 | macsec_offload_state_change = true; | |
3841 | ret = macsec_update_offload(dev, offload); | |
3842 | if (ret) | |
3843 | goto cleanup; | |
3844 | } | |
3845 | } | |
3846 | ||
3cf3227a | 3847 | /* If h/w offloading is available, propagate to the device */ |
15f17355 | 3848 | if (!macsec_offload_state_change && macsec_is_offloaded(macsec)) { |
3cf3227a AT |
3849 | const struct macsec_ops *ops; |
3850 | struct macsec_context ctx; | |
3cf3227a AT |
3851 | |
3852 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3853 | if (!ops) { | |
3854 | ret = -EOPNOTSUPP; | |
3855 | goto cleanup; | |
3856 | } | |
3857 | ||
3858 | ctx.secy = &macsec->secy; | |
3859 | ret = macsec_offload(ops->mdo_upd_secy, &ctx); | |
3860 | if (ret) | |
3861 | goto cleanup; | |
3862 | } | |
3863 | ||
3864 | return 0; | |
3865 | ||
3866 | cleanup: | |
3867 | memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc)); | |
3868 | memcpy(&macsec->secy, &secy, sizeof(secy)); | |
3869 | ||
3870 | return ret; | |
c09440f7 SD |
3871 | } |
3872 | ||
3873 | static void macsec_del_dev(struct macsec_dev *macsec) | |
3874 | { | |
3875 | int i; | |
3876 | ||
3877 | while (macsec->secy.rx_sc) { | |
3878 | struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); | |
3879 | ||
3880 | rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); | |
3881 | free_rx_sc(rx_sc); | |
3882 | } | |
3883 | ||
3884 | for (i = 0; i < MACSEC_NUM_AN; i++) { | |
3885 | struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); | |
3886 | ||
3887 | if (sa) { | |
3888 | RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); | |
3889 | clear_tx_sa(sa); | |
3890 | } | |
3891 | } | |
3892 | } | |
3893 | ||
bbe11fab SD |
3894 | static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
3895 | { | |
3896 | struct macsec_dev *macsec = macsec_priv(dev); | |
e2003872 | 3897 | struct net_device *real_dev = macsec->real_dev; |
bbe11fab | 3898 | |
9cef24c8 LN |
3899 | /* If h/w offloading is available, propagate to the device */ |
3900 | if (macsec_is_offloaded(macsec)) { | |
3901 | const struct macsec_ops *ops; | |
3902 | struct macsec_context ctx; | |
3903 | ||
3904 | ops = macsec_get_ops(netdev_priv(dev), &ctx); | |
3905 | if (ops) { | |
3906 | ctx.secy = &macsec->secy; | |
3907 | macsec_offload(ops->mdo_del_secy, &ctx); | |
3908 | } | |
3909 | } | |
3910 | ||
bbe11fab SD |
3911 | unregister_netdevice_queue(dev, head); |
3912 | list_del_rcu(&macsec->secys); | |
3913 | macsec_del_dev(macsec); | |
e2003872 | 3914 | netdev_upper_dev_unlink(real_dev, dev); |
bbe11fab SD |
3915 | |
3916 | macsec_generation++; | |
3917 | } | |
3918 | ||
c09440f7 SD |
3919 | static void macsec_dellink(struct net_device *dev, struct list_head *head) |
3920 | { | |
3921 | struct macsec_dev *macsec = macsec_priv(dev); | |
3922 | struct net_device *real_dev = macsec->real_dev; | |
3923 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3924 | ||
bbe11fab | 3925 | macsec_common_dellink(dev, head); |
96cfc505 | 3926 | |
960d5848 | 3927 | if (list_empty(&rxd->secys)) { |
c09440f7 | 3928 | netdev_rx_handler_unregister(real_dev); |
960d5848 SD |
3929 | kfree(rxd); |
3930 | } | |
c09440f7 SD |
3931 | } |
3932 | ||
3933 | static int register_macsec_dev(struct net_device *real_dev, | |
3934 | struct net_device *dev) | |
3935 | { | |
3936 | struct macsec_dev *macsec = macsec_priv(dev); | |
3937 | struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); | |
3938 | ||
3939 | if (!rxd) { | |
3940 | int err; | |
3941 | ||
3942 | rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); | |
3943 | if (!rxd) | |
3944 | return -ENOMEM; | |
3945 | ||
3946 | INIT_LIST_HEAD(&rxd->secys); | |
3947 | ||
3948 | err = netdev_rx_handler_register(real_dev, macsec_handle_frame, | |
3949 | rxd); | |
960d5848 SD |
3950 | if (err < 0) { |
3951 | kfree(rxd); | |
c09440f7 | 3952 | return err; |
960d5848 | 3953 | } |
c09440f7 SD |
3954 | } |
3955 | ||
3956 | list_add_tail_rcu(&macsec->secys, &rxd->secys); | |
3957 | return 0; | |
3958 | } | |
3959 | ||
3960 | static bool sci_exists(struct net_device *dev, sci_t sci) | |
3961 | { | |
3962 | struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); | |
3963 | struct macsec_dev *macsec; | |
3964 | ||
3965 | list_for_each_entry(macsec, &rxd->secys, secys) { | |
3966 | if (macsec->secy.sci == sci) | |
3967 | return true; | |
3968 | } | |
3969 | ||
3970 | return false; | |
3971 | } | |
3972 | ||
e82c649e SD |
3973 | static sci_t dev_to_sci(struct net_device *dev, __be16 port) |
3974 | { | |
3975 | return make_sci(dev->dev_addr, port); | |
3976 | } | |
3977 | ||
c09440f7 SD |
3978 | static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) |
3979 | { | |
3980 | struct macsec_dev *macsec = macsec_priv(dev); | |
3981 | struct macsec_secy *secy = &macsec->secy; | |
3982 | ||
3983 | macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); | |
3984 | if (!macsec->stats) | |
3985 | return -ENOMEM; | |
3986 | ||
3987 | secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); | |
0c0cf3db | 3988 | if (!secy->tx_sc.stats) |
c09440f7 | 3989 | return -ENOMEM; |
c09440f7 | 3990 | |
0a28bfd4 | 3991 | secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL); |
0c0cf3db FP |
3992 | if (!secy->tx_sc.md_dst) |
3993 | /* macsec and secy percpu stats will be freed when unregistering | |
3994 | * net_device in macsec_free_netdev() | |
3995 | */ | |
0a28bfd4 | 3996 | return -ENOMEM; |
0a28bfd4 | 3997 | |
c09440f7 SD |
3998 | if (sci == MACSEC_UNDEF_SCI) |
3999 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
4000 | ||
4001 | secy->netdev = dev; | |
4002 | secy->operational = true; | |
4003 | secy->key_len = DEFAULT_SAK_LEN; | |
4004 | secy->icv_len = icv_len; | |
4005 | secy->validate_frames = MACSEC_VALIDATE_DEFAULT; | |
4006 | secy->protect_frames = true; | |
4007 | secy->replay_protect = false; | |
48ef50fa | 4008 | secy->xpn = DEFAULT_XPN; |
c09440f7 SD |
4009 | |
4010 | secy->sci = sci; | |
0a28bfd4 | 4011 | secy->tx_sc.md_dst->u.macsec_info.sci = sci; |
c09440f7 SD |
4012 | secy->tx_sc.active = true; |
4013 | secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; | |
4014 | secy->tx_sc.encrypt = DEFAULT_ENCRYPT; | |
4015 | secy->tx_sc.send_sci = DEFAULT_SEND_SCI; | |
4016 | secy->tx_sc.end_station = false; | |
4017 | secy->tx_sc.scb = false; | |
4018 | ||
4019 | return 0; | |
4020 | } | |
4021 | ||
845e0ebb CW |
4022 | static struct lock_class_key macsec_netdev_addr_lock_key; |
4023 | ||
c09440f7 | 4024 | static int macsec_newlink(struct net *net, struct net_device *dev, |
7a3f4a18 MS |
4025 | struct nlattr *tb[], struct nlattr *data[], |
4026 | struct netlink_ext_ack *extack) | |
c09440f7 SD |
4027 | { |
4028 | struct macsec_dev *macsec = macsec_priv(dev); | |
7f327080 | 4029 | rx_handler_func_t *rx_handler; |
b1671253 | 4030 | u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
c09440f7 | 4031 | struct net_device *real_dev; |
7f327080 | 4032 | int err, mtu; |
c09440f7 | 4033 | sci_t sci; |
c09440f7 SD |
4034 | |
4035 | if (!tb[IFLA_LINK]) | |
4036 | return -EINVAL; | |
4037 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
4038 | if (!real_dev) | |
4039 | return -ENODEV; | |
b06d072c WB |
4040 | if (real_dev->type != ARPHRD_ETHER) |
4041 | return -EINVAL; | |
c09440f7 SD |
4042 | |
4043 | dev->priv_flags |= IFF_MACSEC; | |
4044 | ||
4045 | macsec->real_dev = real_dev; | |
4046 | ||
791bb3fc MS |
4047 | if (data && data[IFLA_MACSEC_OFFLOAD]) |
4048 | macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]); | |
4049 | else | |
4050 | /* MACsec offloading is off by default */ | |
4051 | macsec->offload = MACSEC_OFFLOAD_OFF; | |
4052 | ||
4053 | /* Check if the offloading mode is supported by the underlying layers */ | |
4054 | if (macsec->offload != MACSEC_OFFLOAD_OFF && | |
4055 | !macsec_check_offload(macsec->offload, macsec)) | |
4056 | return -EOPNOTSUPP; | |
3cf3227a | 4057 | |
d0cfa548 LN |
4058 | /* send_sci must be set to true when transmit sci explicitly is set */ |
4059 | if ((data && data[IFLA_MACSEC_SCI]) && | |
4060 | (data && data[IFLA_MACSEC_INC_SCI])) { | |
4061 | u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); | |
4062 | ||
4063 | if (!send_sci) | |
4064 | return -EINVAL; | |
4065 | } | |
4066 | ||
c09440f7 SD |
4067 | if (data && data[IFLA_MACSEC_ICV_LEN]) |
4068 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); | |
7f327080 TY |
4069 | mtu = real_dev->mtu - icv_len - macsec_extra_len(true); |
4070 | if (mtu < 0) | |
4071 | dev->mtu = 0; | |
4072 | else | |
4073 | dev->mtu = mtu; | |
c09440f7 SD |
4074 | |
4075 | rx_handler = rtnl_dereference(real_dev->rx_handler); | |
4076 | if (rx_handler && rx_handler != macsec_handle_frame) | |
4077 | return -EBUSY; | |
4078 | ||
4079 | err = register_netdevice(dev); | |
4080 | if (err < 0) | |
4081 | return err; | |
4082 | ||
1a33e10e | 4083 | netdev_lockdep_set_classes(dev); |
be74294f CW |
4084 | lockdep_set_class(&dev->addr_list_lock, |
4085 | &macsec_netdev_addr_lock_key); | |
1a33e10e | 4086 | |
42ab19ee | 4087 | err = netdev_upper_dev_link(real_dev, dev, extack); |
e2003872 | 4088 | if (err < 0) |
bd28899d | 4089 | goto unregister; |
e2003872 | 4090 | |
c09440f7 SD |
4091 | /* need to be already registered so that ->init has run and |
4092 | * the MAC addr is set | |
4093 | */ | |
4094 | if (data && data[IFLA_MACSEC_SCI]) | |
4095 | sci = nla_get_sci(data[IFLA_MACSEC_SCI]); | |
4096 | else if (data && data[IFLA_MACSEC_PORT]) | |
4097 | sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); | |
4098 | else | |
4099 | sci = dev_to_sci(dev, MACSEC_PORT_ES); | |
4100 | ||
4101 | if (rx_handler && sci_exists(real_dev, sci)) { | |
4102 | err = -EBUSY; | |
e2003872 | 4103 | goto unlink; |
c09440f7 SD |
4104 | } |
4105 | ||
4106 | err = macsec_add_dev(dev, sci, icv_len); | |
4107 | if (err) | |
e2003872 | 4108 | goto unlink; |
c09440f7 | 4109 | |
ccfdec90 FW |
4110 | if (data) { |
4111 | err = macsec_changelink_common(dev, data); | |
4112 | if (err) | |
4113 | goto del_dev; | |
4114 | } | |
c09440f7 | 4115 | |
791bb3fc MS |
4116 | /* If h/w offloading is available, propagate to the device */ |
4117 | if (macsec_is_offloaded(macsec)) { | |
4118 | const struct macsec_ops *ops; | |
4119 | struct macsec_context ctx; | |
4120 | ||
4121 | ops = macsec_get_ops(macsec, &ctx); | |
4122 | if (ops) { | |
4123 | ctx.secy = &macsec->secy; | |
4124 | err = macsec_offload(ops->mdo_add_secy, &ctx); | |
4125 | if (err) | |
4126 | goto del_dev; | |
4127 | } | |
4128 | } | |
4129 | ||
c09440f7 SD |
4130 | err = register_macsec_dev(real_dev, dev); |
4131 | if (err < 0) | |
4132 | goto del_dev; | |
4133 | ||
e6ac0758 SD |
4134 | netif_stacked_transfer_operstate(real_dev, dev); |
4135 | linkwatch_fire_event(dev); | |
4136 | ||
96cfc505 SD |
4137 | macsec_generation++; |
4138 | ||
c09440f7 SD |
4139 | return 0; |
4140 | ||
4141 | del_dev: | |
4142 | macsec_del_dev(macsec); | |
e2003872 SD |
4143 | unlink: |
4144 | netdev_upper_dev_unlink(real_dev, dev); | |
bd28899d | 4145 | unregister: |
c09440f7 SD |
4146 | unregister_netdevice(dev); |
4147 | return err; | |
4148 | } | |
4149 | ||
a8b8a889 MS |
4150 | static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[], |
4151 | struct netlink_ext_ack *extack) | |
c09440f7 | 4152 | { |
74816480 | 4153 | u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
b1671253 | 4154 | u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
c09440f7 SD |
4155 | int flag; |
4156 | bool es, scb, sci; | |
4157 | ||
4158 | if (!data) | |
4159 | return 0; | |
4160 | ||
4161 | if (data[IFLA_MACSEC_CIPHER_SUITE]) | |
4162 | csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); | |
4163 | ||
f04c392d | 4164 | if (data[IFLA_MACSEC_ICV_LEN]) { |
c09440f7 | 4165 | icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
b1671253 | 4166 | if (icv_len != MACSEC_DEFAULT_ICV_LEN) { |
f04c392d DC |
4167 | char dummy_key[DEFAULT_SAK_LEN] = { 0 }; |
4168 | struct crypto_aead *dummy_tfm; | |
4169 | ||
4170 | dummy_tfm = macsec_alloc_tfm(dummy_key, | |
4171 | DEFAULT_SAK_LEN, | |
4172 | icv_len); | |
4173 | if (IS_ERR(dummy_tfm)) | |
4174 | return PTR_ERR(dummy_tfm); | |
4175 | crypto_free_aead(dummy_tfm); | |
4176 | } | |
4177 | } | |
c09440f7 SD |
4178 | |
4179 | switch (csid) { | |
ccfdec90 FW |
4180 | case MACSEC_CIPHER_ID_GCM_AES_128: |
4181 | case MACSEC_CIPHER_ID_GCM_AES_256: | |
48ef50fa EM |
4182 | case MACSEC_CIPHER_ID_GCM_AES_XPN_128: |
4183 | case MACSEC_CIPHER_ID_GCM_AES_XPN_256: | |
e8660ded | 4184 | case MACSEC_DEFAULT_CIPHER_ID: |
c09440f7 | 4185 | if (icv_len < MACSEC_MIN_ICV_LEN || |
2ccbe2cb | 4186 | icv_len > MACSEC_STD_ICV_LEN) |
c09440f7 SD |
4187 | return -EINVAL; |
4188 | break; | |
4189 | default: | |
4190 | return -EINVAL; | |
4191 | } | |
4192 | ||
4193 | if (data[IFLA_MACSEC_ENCODING_SA]) { | |
4194 | if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) | |
4195 | return -EINVAL; | |
4196 | } | |
4197 | ||
4198 | for (flag = IFLA_MACSEC_ENCODING_SA + 1; | |
4199 | flag < IFLA_MACSEC_VALIDATION; | |
4200 | flag++) { | |
4201 | if (data[flag]) { | |
4202 | if (nla_get_u8(data[flag]) > 1) | |
4203 | return -EINVAL; | |
4204 | } | |
4205 | } | |
4206 | ||
4207 | es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; | |
4208 | sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; | |
4209 | scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; | |
4210 | ||
4211 | if ((sci && (scb || es)) || (scb && es)) | |
4212 | return -EINVAL; | |
4213 | ||
4214 | if (data[IFLA_MACSEC_VALIDATION] && | |
4215 | nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) | |
4216 | return -EINVAL; | |
4217 | ||
4b1fb935 SD |
4218 | if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
4219 | nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && | |
c09440f7 SD |
4220 | !data[IFLA_MACSEC_WINDOW]) |
4221 | return -EINVAL; | |
4222 | ||
4223 | return 0; | |
4224 | } | |
4225 | ||
4226 | static struct net *macsec_get_link_net(const struct net_device *dev) | |
4227 | { | |
4228 | return dev_net(macsec_priv(dev)->real_dev); | |
4229 | } | |
4230 | ||
f132fdd9 PH |
4231 | struct net_device *macsec_get_real_dev(const struct net_device *dev) |
4232 | { | |
4233 | return macsec_priv(dev)->real_dev; | |
4234 | } | |
4235 | EXPORT_SYMBOL_GPL(macsec_get_real_dev); | |
4236 | ||
4237 | bool macsec_netdev_is_offloaded(struct net_device *dev) | |
4238 | { | |
4239 | return macsec_is_offloaded(macsec_priv(dev)); | |
4240 | } | |
4241 | EXPORT_SYMBOL_GPL(macsec_netdev_is_offloaded); | |
4242 | ||
c09440f7 SD |
4243 | static size_t macsec_get_size(const struct net_device *dev) |
4244 | { | |
c9fba3ed ZS |
4245 | return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */ |
4246 | nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */ | |
4247 | nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */ | |
4248 | nla_total_size(4) + /* IFLA_MACSEC_WINDOW */ | |
4249 | nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */ | |
4250 | nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */ | |
4251 | nla_total_size(1) + /* IFLA_MACSEC_PROTECT */ | |
4252 | nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */ | |
4253 | nla_total_size(1) + /* IFLA_MACSEC_ES */ | |
4254 | nla_total_size(1) + /* IFLA_MACSEC_SCB */ | |
4255 | nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */ | |
4256 | nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */ | |
723e8a48 | 4257 | nla_total_size(1) + /* IFLA_MACSEC_OFFLOAD */ |
c09440f7 SD |
4258 | 0; |
4259 | } | |
4260 | ||
4261 | static int macsec_fill_info(struct sk_buff *skb, | |
4262 | const struct net_device *dev) | |
4263 | { | |
723e8a48 EH |
4264 | struct macsec_tx_sc *tx_sc; |
4265 | struct macsec_dev *macsec; | |
4266 | struct macsec_secy *secy; | |
ccfdec90 FW |
4267 | u64 csid; |
4268 | ||
723e8a48 EH |
4269 | macsec = macsec_priv(dev); |
4270 | secy = &macsec->secy; | |
4271 | tx_sc = &secy->tx_sc; | |
4272 | ||
ccfdec90 FW |
4273 | switch (secy->key_len) { |
4274 | case MACSEC_GCM_AES_128_SAK_LEN: | |
48ef50fa | 4275 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
ccfdec90 FW |
4276 | break; |
4277 | case MACSEC_GCM_AES_256_SAK_LEN: | |
48ef50fa | 4278 | csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
ccfdec90 FW |
4279 | break; |
4280 | default: | |
4281 | goto nla_put_failure; | |
4282 | } | |
c09440f7 | 4283 | |
f60d94c0 ND |
4284 | if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
4285 | IFLA_MACSEC_PAD) || | |
c09440f7 | 4286 | nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
f60d94c0 | 4287 | nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
ccfdec90 | 4288 | csid, IFLA_MACSEC_PAD) || |
c09440f7 SD |
4289 | nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
4290 | nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || | |
4291 | nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || | |
4292 | nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || | |
4293 | nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || | |
4294 | nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || | |
4295 | nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || | |
4296 | nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || | |
723e8a48 | 4297 | nla_put_u8(skb, IFLA_MACSEC_OFFLOAD, macsec->offload) || |
c09440f7 SD |
4298 | 0) |
4299 | goto nla_put_failure; | |
4300 | ||
4301 | if (secy->replay_protect) { | |
4302 | if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) | |
4303 | goto nla_put_failure; | |
4304 | } | |
4305 | ||
4306 | return 0; | |
4307 | ||
4308 | nla_put_failure: | |
4309 | return -EMSGSIZE; | |
4310 | } | |
4311 | ||
4312 | static struct rtnl_link_ops macsec_link_ops __read_mostly = { | |
4313 | .kind = "macsec", | |
4314 | .priv_size = sizeof(struct macsec_dev), | |
4315 | .maxtype = IFLA_MACSEC_MAX, | |
4316 | .policy = macsec_rtnl_policy, | |
4317 | .setup = macsec_setup, | |
4318 | .validate = macsec_validate_attr, | |
4319 | .newlink = macsec_newlink, | |
4320 | .changelink = macsec_changelink, | |
4321 | .dellink = macsec_dellink, | |
4322 | .get_size = macsec_get_size, | |
4323 | .fill_info = macsec_fill_info, | |
4324 | .get_link_net = macsec_get_link_net, | |
4325 | }; | |
4326 | ||
4327 | static bool is_macsec_master(struct net_device *dev) | |
4328 | { | |
4329 | return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; | |
4330 | } | |
4331 | ||
4332 | static int macsec_notify(struct notifier_block *this, unsigned long event, | |
4333 | void *ptr) | |
4334 | { | |
4335 | struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); | |
4336 | LIST_HEAD(head); | |
4337 | ||
4338 | if (!is_macsec_master(real_dev)) | |
4339 | return NOTIFY_DONE; | |
4340 | ||
4341 | switch (event) { | |
e6ac0758 SD |
4342 | case NETDEV_DOWN: |
4343 | case NETDEV_UP: | |
4344 | case NETDEV_CHANGE: { | |
4345 | struct macsec_dev *m, *n; | |
4346 | struct macsec_rxh_data *rxd; | |
4347 | ||
4348 | rxd = macsec_data_rtnl(real_dev); | |
4349 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
4350 | struct net_device *dev = m->secy.netdev; | |
4351 | ||
4352 | netif_stacked_transfer_operstate(real_dev, dev); | |
4353 | } | |
4354 | break; | |
4355 | } | |
c09440f7 SD |
4356 | case NETDEV_UNREGISTER: { |
4357 | struct macsec_dev *m, *n; | |
4358 | struct macsec_rxh_data *rxd; | |
4359 | ||
4360 | rxd = macsec_data_rtnl(real_dev); | |
4361 | list_for_each_entry_safe(m, n, &rxd->secys, secys) { | |
bbe11fab | 4362 | macsec_common_dellink(m->secy.netdev, &head); |
c09440f7 | 4363 | } |
bbe11fab SD |
4364 | |
4365 | netdev_rx_handler_unregister(real_dev); | |
4366 | kfree(rxd); | |
4367 | ||
c09440f7 SD |
4368 | unregister_netdevice_many(&head); |
4369 | break; | |
4370 | } | |
4371 | case NETDEV_CHANGEMTU: { | |
4372 | struct macsec_dev *m; | |
4373 | struct macsec_rxh_data *rxd; | |
4374 | ||
4375 | rxd = macsec_data_rtnl(real_dev); | |
4376 | list_for_each_entry(m, &rxd->secys, secys) { | |
4377 | struct net_device *dev = m->secy.netdev; | |
4378 | unsigned int mtu = real_dev->mtu - (m->secy.icv_len + | |
4379 | macsec_extra_len(true)); | |
4380 | ||
4381 | if (dev->mtu > mtu) | |
4382 | dev_set_mtu(dev, mtu); | |
4383 | } | |
4384 | } | |
4385 | } | |
4386 | ||
4387 | return NOTIFY_OK; | |
4388 | } | |
4389 | ||
4390 | static struct notifier_block macsec_notifier = { | |
4391 | .notifier_call = macsec_notify, | |
4392 | }; | |
4393 | ||
4394 | static int __init macsec_init(void) | |
4395 | { | |
4396 | int err; | |
4397 | ||
4398 | pr_info("MACsec IEEE 802.1AE\n"); | |
4399 | err = register_netdevice_notifier(&macsec_notifier); | |
4400 | if (err) | |
4401 | return err; | |
4402 | ||
4403 | err = rtnl_link_register(&macsec_link_ops); | |
4404 | if (err) | |
4405 | goto notifier; | |
4406 | ||
489111e5 | 4407 | err = genl_register_family(&macsec_fam); |
c09440f7 SD |
4408 | if (err) |
4409 | goto rtnl; | |
4410 | ||
4411 | return 0; | |
4412 | ||
4413 | rtnl: | |
4414 | rtnl_link_unregister(&macsec_link_ops); | |
4415 | notifier: | |
4416 | unregister_netdevice_notifier(&macsec_notifier); | |
4417 | return err; | |
4418 | } | |
4419 | ||
4420 | static void __exit macsec_exit(void) | |
4421 | { | |
4422 | genl_unregister_family(&macsec_fam); | |
4423 | rtnl_link_unregister(&macsec_link_ops); | |
4424 | unregister_netdevice_notifier(&macsec_notifier); | |
b196c22a | 4425 | rcu_barrier(); |
c09440f7 SD |
4426 | } |
4427 | ||
4428 | module_init(macsec_init); | |
4429 | module_exit(macsec_exit); | |
4430 | ||
4431 | MODULE_ALIAS_RTNL_LINK("macsec"); | |
78362998 | 4432 | MODULE_ALIAS_GENL_FAMILY("macsec"); |
c09440f7 SD |
4433 | |
4434 | MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); | |
4435 | MODULE_LICENSE("GPL v2"); |