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net: macsec: allow multiple macsec devices with offload
[mirror_ubuntu-hirsute-kernel.git] / drivers / net / macsec.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
c09440f7
SD		 2/*
3 * drivers/net/macsec.c - MACsec device
4 *
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
c09440f7
SD		 6 */
7
8#include <linux/types.h>
9#include <linux/skbuff.h>
10#include <linux/socket.h>
11#include <linux/module.h>
12#include <crypto/aead.h>
13#include <linux/etherdevice.h>
3cf3227a 14#include <linux/netdevice.h>
c09440f7 15#include <linux/rtnetlink.h>
e187246f 16#include <linux/refcount.h>
c09440f7
SD		 17#include <net/genetlink.h>
18#include <net/sock.h>
5491e7c6 19#include <net/gro_cells.h>
c0e4eadf 20#include <net/macsec.h>
3cf3227a 21#include <linux/phy.h>
a21ecf0e 22#include <linux/byteorder/generic.h>
b06d072c 23#include <linux/if_arp.h>
c09440f7
SD		 24
25#include <uapi/linux/if_macsec.h>
26
c09440f7
SD		 27#define MACSEC_SCI_LEN 8
28
29/* SecTAG length = macsec_eth_header without the optional SCI */
30#define MACSEC_TAG_LEN 6
31
32struct macsec_eth_header {
33 struct ethhdr eth;
34 /* SecTAG */
35 u8 tci_an;
36#if defined(__LITTLE_ENDIAN_BITFIELD)
37 u8 short_length:6,
38 unused:2;
39#elif defined(__BIG_ENDIAN_BITFIELD)
40 u8 unused:2,
41 short_length:6;
42#else
43#error "Please fix <asm/byteorder.h>"
44#endif
45 __be32 packet_number;
46 u8 secure_channel_id[8]; /* optional */
47} __packed;
48
49#define MACSEC_TCI_VERSION 0x80
50#define MACSEC_TCI_ES 0x40 /* end station */
51#define MACSEC_TCI_SC 0x20 /* SCI present */
52#define MACSEC_TCI_SCB 0x10 /* epon */
53#define MACSEC_TCI_E 0x08 /* encryption */
54#define MACSEC_TCI_C 0x04 /* changed text */
55#define MACSEC_AN_MASK 0x03 /* association number */
56#define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
57
58/* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59#define MIN_NON_SHORT_LEN 48
60
61#define GCM_AES_IV_LEN 12
62#define DEFAULT_ICV_LEN 16
63
7979472b 64#define for_each_rxsc(secy, sc) \
c09440f7 65 for (sc = rcu_dereference_bh(secy->rx_sc); \
7979472b 66 sc; \
c09440f7
SD		 67 sc = rcu_dereference_bh(sc->next))
68#define for_each_rxsc_rtnl(secy, sc) \
69 for (sc = rtnl_dereference(secy->rx_sc); \
70 sc; \
71 sc = rtnl_dereference(sc->next))
72
a21ecf0e
EM		 73#define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
74
75struct gcm_iv_xpn {
76 union {
77 u8 short_secure_channel_id[4];
78 ssci_t ssci;
79 };
80 __be64 pn;
81} __packed;
82
c09440f7
SD		 83struct gcm_iv {
84 union {
85 u8 secure_channel_id[8];
86 sci_t sci;
87 };
88 __be32 pn;
89};
90
c09440f7
SD		 91struct macsec_dev_stats {
92 __u64 OutPktsUntagged;
93 __u64 InPktsUntagged;
94 __u64 OutPktsTooLong;
95 __u64 InPktsNoTag;
96 __u64 InPktsBadTag;
97 __u64 InPktsUnknownSCI;
98 __u64 InPktsNoSCI;
99 __u64 InPktsOverrun;
100};
101
c09440f7
SD		 102#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
103
c09440f7
SD		 104struct pcpu_secy_stats {
105 struct macsec_dev_stats stats;
106 struct u64_stats_sync syncp;
107};
108
109/**
110 * struct macsec_dev - private data
111 * @secy: SecY config
112 * @real_dev: pointer to underlying netdevice
113 * @stats: MACsec device stats
114 * @secys: linked list of SecY's on the underlying device
3cf3227a 115 * @offload: status of offloading on the MACsec device
c09440f7
SD		 116 */
117struct macsec_dev {
118 struct macsec_secy secy;
119 struct net_device *real_dev;
120 struct pcpu_secy_stats __percpu *stats;
121 struct list_head secys;
5491e7c6 122 struct gro_cells gro_cells;
3cf3227a 123 enum macsec_offload offload;
c09440f7
SD		 124};
125
126/**
127 * struct macsec_rxh_data - rx_handler private argument
128 * @secys: linked list of SecY's on this underlying device
129 */
130struct macsec_rxh_data {
131 struct list_head secys;
132};
133
134static struct macsec_dev *macsec_priv(const struct net_device *dev)
135{
136 return (struct macsec_dev *)netdev_priv(dev);
137}
138
139static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
140{
141 return rcu_dereference_bh(dev->rx_handler_data);
142}
143
144static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
145{
146 return rtnl_dereference(dev->rx_handler_data);
147}
148
149struct macsec_cb {
150 struct aead_request *req;
151 union {
152 struct macsec_tx_sa *tx_sa;
153 struct macsec_rx_sa *rx_sa;
154 };
155 u8 assoc_num;
156 bool valid;
157 bool has_sci;
158};
159
160static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
161{
162 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
163
164 if (!sa || !sa->active)
165 return NULL;
166
e187246f 167 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 168 return NULL;
169
170 return sa;
171}
172
173static void free_rx_sc_rcu(struct rcu_head *head)
174{
175 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
176
177 free_percpu(rx_sc->stats);
178 kfree(rx_sc);
179}
180
181static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
182{
8676d76f 183 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
c09440f7
SD		 184}
185
186static void macsec_rxsc_put(struct macsec_rx_sc *sc)
187{
8676d76f 188 if (refcount_dec_and_test(&sc->refcnt))
c09440f7
SD		 189 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
190}
191
192static void free_rxsa(struct rcu_head *head)
193{
194 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
195
196 crypto_free_aead(sa->key.tfm);
197 free_percpu(sa->stats);
c09440f7
SD		 198 kfree(sa);
199}
200
201static void macsec_rxsa_put(struct macsec_rx_sa *sa)
202{
e187246f 203 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 204 call_rcu(&sa->rcu, free_rxsa);
205}
206
207static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
208{
209 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
210
211 if (!sa || !sa->active)
212 return NULL;
213
28206cdb 214 if (!refcount_inc_not_zero(&sa->refcnt))
c09440f7
SD		 215 return NULL;
216
217 return sa;
218}
219
220static void free_txsa(struct rcu_head *head)
221{
222 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
223
224 crypto_free_aead(sa->key.tfm);
225 free_percpu(sa->stats);
226 kfree(sa);
227}
228
229static void macsec_txsa_put(struct macsec_tx_sa *sa)
230{
28206cdb 231 if (refcount_dec_and_test(&sa->refcnt))
c09440f7
SD		 232 call_rcu(&sa->rcu, free_txsa);
233}
234
235static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
236{
237 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
238 return (struct macsec_cb *)skb->cb;
239}
240
241#define MACSEC_PORT_ES (htons(0x0001))
242#define MACSEC_PORT_SCB (0x0000)
243#define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
48ef50fa 244#define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
c09440f7 245
ccfdec90
FW		 246#define MACSEC_GCM_AES_128_SAK_LEN 16
247#define MACSEC_GCM_AES_256_SAK_LEN 32
248
ccfdec90 249#define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
48ef50fa 250#define DEFAULT_XPN false
c09440f7
SD		 251#define DEFAULT_SEND_SCI true
252#define DEFAULT_ENCRYPT false
253#define DEFAULT_ENCODING_SA 0
254
e0f841f5
TB		 255static bool send_sci(const struct macsec_secy *secy)
256{
257 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
258
259 return tx_sc->send_sci ||
260 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
261}
262
c09440f7
SD		 263static sci_t make_sci(u8 *addr, __be16 port)
264{
265 sci_t sci;
266
267 memcpy(&sci, addr, ETH_ALEN);
268 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
269
270 return sci;
271}
272
273static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
274{
275 sci_t sci;
276
277 if (sci_present)
278 memcpy(&sci, hdr->secure_channel_id,
279 sizeof(hdr->secure_channel_id));
280 else
281 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
282
283 return sci;
284}
285
286static unsigned int macsec_sectag_len(bool sci_present)
287{
288 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
289}
290
291static unsigned int macsec_hdr_len(bool sci_present)
292{
293 return macsec_sectag_len(sci_present) + ETH_HLEN;
294}
295
296static unsigned int macsec_extra_len(bool sci_present)
297{
298 return macsec_sectag_len(sci_present) + sizeof(__be16);
299}
300
301/* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
302static void macsec_fill_sectag(struct macsec_eth_header *h,
e0f841f5
TB		 303 const struct macsec_secy *secy, u32 pn,
304 bool sci_present)
c09440f7
SD		 305{
306 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
307
e0f841f5 308 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
c09440f7
SD		 309 h->eth.h_proto = htons(ETH_P_MACSEC);
310
e0f841f5 311 if (sci_present) {
c09440f7
SD		 312 h->tci_an |= MACSEC_TCI_SC;
313 memcpy(&h->secure_channel_id, &secy->sci,
314 sizeof(h->secure_channel_id));
315 } else {
316 if (tx_sc->end_station)
317 h->tci_an |= MACSEC_TCI_ES;
318 if (tx_sc->scb)
319 h->tci_an |= MACSEC_TCI_SCB;
320 }
321
322 h->packet_number = htonl(pn);
323
324 /* with GCM, C/E clear for !encrypt, both set for encrypt */
325 if (tx_sc->encrypt)
326 h->tci_an |= MACSEC_TCI_CONFID;
327 else if (secy->icv_len != DEFAULT_ICV_LEN)
328 h->tci_an |= MACSEC_TCI_C;
329
330 h->tci_an |= tx_sc->encoding_sa;
331}
332
333static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
334{
335 if (data_len < MIN_NON_SHORT_LEN)
336 h->short_length = data_len;
337}
338
3cf3227a
AT		 339/* Checks if a MACsec interface is being offloaded to an hardware engine */
340static bool macsec_is_offloaded(struct macsec_dev *macsec)
341{
21114b7f
AT		 342 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
343 macsec->offload == MACSEC_OFFLOAD_PHY)
3cf3227a
AT		 344 return true;
345
346 return false;
347}
348
349/* Checks if underlying layers implement MACsec offloading functions. */
350static bool macsec_check_offload(enum macsec_offload offload,
351 struct macsec_dev *macsec)
352{
353 if (!macsec || !macsec->real_dev)
354 return false;
355
356 if (offload == MACSEC_OFFLOAD_PHY)
357 return macsec->real_dev->phydev &&
358 macsec->real_dev->phydev->macsec_ops;
21114b7f
AT		 359 else if (offload == MACSEC_OFFLOAD_MAC)
360 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
361 macsec->real_dev->macsec_ops;
3cf3227a
AT		 362
363 return false;
364}
365
366static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
367 struct macsec_dev *macsec,
368 struct macsec_context *ctx)
369{
370 if (ctx) {
371 memset(ctx, 0, sizeof(*ctx));
372 ctx->offload = offload;
373
374 if (offload == MACSEC_OFFLOAD_PHY)
375 ctx->phydev = macsec->real_dev->phydev;
21114b7f
AT		 376 else if (offload == MACSEC_OFFLOAD_MAC)
377 ctx->netdev = macsec->real_dev;
3cf3227a
AT		 378 }
379
21114b7f
AT		 380 if (offload == MACSEC_OFFLOAD_PHY)
381 return macsec->real_dev->phydev->macsec_ops;
382 else
383 return macsec->real_dev->macsec_ops;
3cf3227a
AT		 384}
385
386/* Returns a pointer to the MACsec ops struct if any and updates the MACsec
387 * context device reference if provided.
388 */
389static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
390 struct macsec_context *ctx)
391{
392 if (!macsec_check_offload(macsec->offload, macsec))
393 return NULL;
394
395 return __macsec_get_ops(macsec->offload, macsec, ctx);
396}
397
a21ecf0e
EM		 398/* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
399static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
c09440f7
SD		 400{
401 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
402 int len = skb->len - 2 * ETH_ALEN;
403 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
404
405 /* a) It comprises at least 17 octets */
406 if (skb->len <= 16)
407 return false;
408
409 /* b) MACsec EtherType: already checked */
410
411 /* c) V bit is clear */
412 if (h->tci_an & MACSEC_TCI_VERSION)
413 return false;
414
415 /* d) ES or SCB => !SC */
416 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
417 (h->tci_an & MACSEC_TCI_SC))
418 return false;
419
420 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
421 if (h->unused)
422 return false;
423
a21ecf0e
EM		 424 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
425 if (!h->packet_number && !xpn)
c09440f7
SD		 426 return false;
427
428 /* length check, f) g) h) i) */
429 if (h->short_length)
430 return len == extra_len + h->short_length;
431 return len >= extra_len + MIN_NON_SHORT_LEN;
432}
433
434#define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
2ccbe2cb 435#define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
c09440f7 436
a21ecf0e
EM		 437static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
438 salt_t salt)
439{
440 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
441
442 gcm_iv->ssci = ssci ^ salt.ssci;
443 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
444}
445
c09440f7
SD		 446static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
447{
448 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
449
450 gcm_iv->sci = sci;
451 gcm_iv->pn = htonl(pn);
452}
453
454static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
455{
456 return (struct macsec_eth_header *)skb_mac_header(skb);
457}
458
6fc498bc
DB		 459static sci_t dev_to_sci(struct net_device *dev, __be16 port)
460{
461 return make_sci(dev->dev_addr, port);
462}
463
5c937de7
AT		 464static void __macsec_pn_wrapped(struct macsec_secy *secy,
465 struct macsec_tx_sa *tx_sa)
466{
467 pr_debug("PN wrapped, transitioning to !oper\n");
468 tx_sa->active = false;
469 if (secy->protect_frames)
470 secy->operational = false;
471}
472
473void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
474{
475 spin_lock_bh(&tx_sa->lock);
476 __macsec_pn_wrapped(secy, tx_sa);
477 spin_unlock_bh(&tx_sa->lock);
478}
479EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
480
a21ecf0e
EM		 481static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
482 struct macsec_secy *secy)
c09440f7 483{
a21ecf0e 484 pn_t pn;
c09440f7
SD		 485
486 spin_lock_bh(&tx_sa->lock);
c09440f7 487
a21ecf0e
EM		 488 pn = tx_sa->next_pn_halves;
489 if (secy->xpn)
490 tx_sa->next_pn++;
491 else
492 tx_sa->next_pn_halves.lower++;
493
5c937de7
AT		 494 if (tx_sa->next_pn == 0)
495 __macsec_pn_wrapped(secy, tx_sa);
c09440f7
SD		 496 spin_unlock_bh(&tx_sa->lock);
497
498 return pn;
499}
500
501static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
502{
503 struct macsec_dev *macsec = netdev_priv(dev);
504
505 skb->dev = macsec->real_dev;
506 skb_reset_mac_header(skb);
507 skb->protocol = eth_hdr(skb)->h_proto;
508}
509
510static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
511 struct macsec_tx_sa *tx_sa)
512{
513 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
514
515 u64_stats_update_begin(&txsc_stats->syncp);
516 if (tx_sc->encrypt) {
517 txsc_stats->stats.OutOctetsEncrypted += skb->len;
518 txsc_stats->stats.OutPktsEncrypted++;
519 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
520 } else {
521 txsc_stats->stats.OutOctetsProtected += skb->len;
522 txsc_stats->stats.OutPktsProtected++;
523 this_cpu_inc(tx_sa->stats->OutPktsProtected);
524 }
525 u64_stats_update_end(&txsc_stats->syncp);
526}
527
528static void count_tx(struct net_device *dev, int ret, int len)
529{
530 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
531 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
532
533 u64_stats_update_begin(&stats->syncp);
534 stats->tx_packets++;
535 stats->tx_bytes += len;
536 u64_stats_update_end(&stats->syncp);
c09440f7
SD		 537 }
538}
539
540static void macsec_encrypt_done(struct crypto_async_request *base, int err)
541{
542 struct sk_buff *skb = base->data;
543 struct net_device *dev = skb->dev;
544 struct macsec_dev *macsec = macsec_priv(dev);
545 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
546 int len, ret;
547
548 aead_request_free(macsec_skb_cb(skb)->req);
549
550 rcu_read_lock_bh();
551 macsec_encrypt_finish(skb, dev);
552 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
553 len = skb->len;
554 ret = dev_queue_xmit(skb);
555 count_tx(dev, ret, len);
556 rcu_read_unlock_bh();
557
558 macsec_txsa_put(sa);
559 dev_put(dev);
560}
561
5d9649b3
SD		 562static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
563 unsigned char **iv,
5294b830
JD		 564 struct scatterlist **sg,
565 int num_frags)
5d9649b3
SD		 566{
567 size_t size, iv_offset, sg_offset;
568 struct aead_request *req;
569 void *tmp;
570
571 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
572 iv_offset = size;
573 size += GCM_AES_IV_LEN;
574
575 size = ALIGN(size, __alignof__(struct scatterlist));
576 sg_offset = size;
5294b830 577 size += sizeof(struct scatterlist) * num_frags;
5d9649b3
SD		 578
579 tmp = kmalloc(size, GFP_ATOMIC);
580 if (!tmp)
581 return NULL;
582
583 *iv = (unsigned char *)(tmp + iv_offset);
584 *sg = (struct scatterlist *)(tmp + sg_offset);
585 req = tmp;
586
587 aead_request_set_tfm(req, tfm);
588
589 return req;
590}
591
c09440f7
SD		 592static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
593 struct net_device *dev)
594{
595 int ret;
5d9649b3 596 struct scatterlist *sg;
5294b830 597 struct sk_buff *trailer;
5d9649b3 598 unsigned char *iv;
c09440f7
SD		 599 struct ethhdr *eth;
600 struct macsec_eth_header *hh;
601 size_t unprotected_len;
602 struct aead_request *req;
603 struct macsec_secy *secy;
604 struct macsec_tx_sc *tx_sc;
605 struct macsec_tx_sa *tx_sa;
606 struct macsec_dev *macsec = macsec_priv(dev);
e0f841f5 607 bool sci_present;
a21ecf0e 608 pn_t pn;
c09440f7
SD		 609
610 secy = &macsec->secy;
611 tx_sc = &secy->tx_sc;
612
613 /* 10.5.1 TX SA assignment */
614 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
615 if (!tx_sa) {
616 secy->operational = false;
617 kfree_skb(skb);
618 return ERR_PTR(-EINVAL);
619 }
620
621 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
622 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
623 struct sk_buff *nskb = skb_copy_expand(skb,
624 MACSEC_NEEDED_HEADROOM,
625 MACSEC_NEEDED_TAILROOM,
626 GFP_ATOMIC);
627 if (likely(nskb)) {
628 consume_skb(skb);
629 skb = nskb;
630 } else {
631 macsec_txsa_put(tx_sa);
632 kfree_skb(skb);
633 return ERR_PTR(-ENOMEM);
634 }
635 } else {
636 skb = skb_unshare(skb, GFP_ATOMIC);
637 if (!skb) {
638 macsec_txsa_put(tx_sa);
639 return ERR_PTR(-ENOMEM);
640 }
641 }
642
643 unprotected_len = skb->len;
644 eth = eth_hdr(skb);
e0f841f5 645 sci_present = send_sci(secy);
d58ff351 646 hh = skb_push(skb, macsec_extra_len(sci_present));
c09440f7
SD		 647 memmove(hh, eth, 2 * ETH_ALEN);
648
649 pn = tx_sa_update_pn(tx_sa, secy);
a21ecf0e 650 if (pn.full64 == 0) {
c09440f7
SD		 651 macsec_txsa_put(tx_sa);
652 kfree_skb(skb);
653 return ERR_PTR(-ENOLINK);
654 }
a21ecf0e 655 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
c09440f7
SD		 656 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
657
c09440f7
SD		 658 skb_put(skb, secy->icv_len);
659
660 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
661 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
662
663 u64_stats_update_begin(&secy_stats->syncp);
664 secy_stats->stats.OutPktsTooLong++;
665 u64_stats_update_end(&secy_stats->syncp);
666
667 macsec_txsa_put(tx_sa);
668 kfree_skb(skb);
669 return ERR_PTR(-EINVAL);
670 }
671
5294b830
JD		 672 ret = skb_cow_data(skb, 0, &trailer);
673 if (unlikely(ret < 0)) {
674 macsec_txsa_put(tx_sa);
675 kfree_skb(skb);
676 return ERR_PTR(ret);
677 }
678
679 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 680 if (!req) {
681 macsec_txsa_put(tx_sa);
682 kfree_skb(skb);
683 return ERR_PTR(-ENOMEM);
684 }
685
a21ecf0e
EM		 686 if (secy->xpn)
687 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
688 else
689 macsec_fill_iv(iv, secy->sci, pn.lower);
5d9649b3 690
5294b830 691 sg_init_table(sg, ret);
cda7ea69
JD		 692 ret = skb_to_sgvec(skb, sg, 0, skb->len);
693 if (unlikely(ret < 0)) {
5aba2ba5 694 aead_request_free(req);
cda7ea69
JD		 695 macsec_txsa_put(tx_sa);
696 kfree_skb(skb);
697 return ERR_PTR(ret);
698 }
c09440f7
SD		 699
700 if (tx_sc->encrypt) {
e0f841f5 701 int len = skb->len - macsec_hdr_len(sci_present) -
c09440f7
SD		 702 secy->icv_len;
703 aead_request_set_crypt(req, sg, sg, len, iv);
e0f841f5 704 aead_request_set_ad(req, macsec_hdr_len(sci_present));
c09440f7
SD		 705 } else {
706 aead_request_set_crypt(req, sg, sg, 0, iv);
707 aead_request_set_ad(req, skb->len - secy->icv_len);
708 }
709
710 macsec_skb_cb(skb)->req = req;
711 macsec_skb_cb(skb)->tx_sa = tx_sa;
712 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
713
714 dev_hold(skb->dev);
715 ret = crypto_aead_encrypt(req);
716 if (ret == -EINPROGRESS) {
717 return ERR_PTR(ret);
718 } else if (ret != 0) {
719 dev_put(skb->dev);
720 kfree_skb(skb);
721 aead_request_free(req);
722 macsec_txsa_put(tx_sa);
723 return ERR_PTR(-EINVAL);
724 }
725
726 dev_put(skb->dev);
727 aead_request_free(req);
728 macsec_txsa_put(tx_sa);
729
730 return skb;
731}
732
733static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
734{
735 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
736 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
737 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
738 u32 lowest_pn = 0;
739
740 spin_lock(&rx_sa->lock);
a21ecf0e
EM		 741 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
742 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
c09440f7
SD		 743
744 /* Now perform replay protection check again
745 * (see IEEE 802.1AE-2006 figure 10-5)
746 */
a21ecf0e
EM		 747 if (secy->replay_protect && pn < lowest_pn &&
748 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
c09440f7
SD		 749 spin_unlock(&rx_sa->lock);
750 u64_stats_update_begin(&rxsc_stats->syncp);
751 rxsc_stats->stats.InPktsLate++;
752 u64_stats_update_end(&rxsc_stats->syncp);
753 return false;
754 }
755
756 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
757 u64_stats_update_begin(&rxsc_stats->syncp);
758 if (hdr->tci_an & MACSEC_TCI_E)
759 rxsc_stats->stats.InOctetsDecrypted += skb->len;
760 else
761 rxsc_stats->stats.InOctetsValidated += skb->len;
762 u64_stats_update_end(&rxsc_stats->syncp);
763 }
764
765 if (!macsec_skb_cb(skb)->valid) {
766 spin_unlock(&rx_sa->lock);
767
768 /* 10.6.5 */
769 if (hdr->tci_an & MACSEC_TCI_C ||
770 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
771 u64_stats_update_begin(&rxsc_stats->syncp);
772 rxsc_stats->stats.InPktsNotValid++;
773 u64_stats_update_end(&rxsc_stats->syncp);
774 return false;
775 }
776
777 u64_stats_update_begin(&rxsc_stats->syncp);
778 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
779 rxsc_stats->stats.InPktsInvalid++;
780 this_cpu_inc(rx_sa->stats->InPktsInvalid);
781 } else if (pn < lowest_pn) {
782 rxsc_stats->stats.InPktsDelayed++;
783 } else {
784 rxsc_stats->stats.InPktsUnchecked++;
785 }
786 u64_stats_update_end(&rxsc_stats->syncp);
787 } else {
788 u64_stats_update_begin(&rxsc_stats->syncp);
789 if (pn < lowest_pn) {
790 rxsc_stats->stats.InPktsDelayed++;
791 } else {
792 rxsc_stats->stats.InPktsOK++;
793 this_cpu_inc(rx_sa->stats->InPktsOK);
794 }
795 u64_stats_update_end(&rxsc_stats->syncp);
796
a21ecf0e
EM		 797 // Instead of "pn >=" - to support pn overflow in xpn
798 if (pn + 1 > rx_sa->next_pn_halves.lower) {
799 rx_sa->next_pn_halves.lower = pn + 1;
800 } else if (secy->xpn &&
801 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
802 rx_sa->next_pn_halves.upper++;
803 rx_sa->next_pn_halves.lower = pn + 1;
804 }
805
c09440f7
SD		 806 spin_unlock(&rx_sa->lock);
807 }
808
809 return true;
810}
811
812static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
813{
814 skb->pkt_type = PACKET_HOST;
815 skb->protocol = eth_type_trans(skb, dev);
816
817 skb_reset_network_header(skb);
818 if (!skb_transport_header_was_set(skb))
819 skb_reset_transport_header(skb);
820 skb_reset_mac_len(skb);
821}
822
823static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
824{
7d8b16b9 825 skb->ip_summed = CHECKSUM_NONE;
c09440f7
SD		 826 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
827 skb_pull(skb, hdr_len);
828 pskb_trim_unique(skb, skb->len - icv_len);
829}
830
831static void count_rx(struct net_device *dev, int len)
832{
833 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
834
835 u64_stats_update_begin(&stats->syncp);
836 stats->rx_packets++;
837 stats->rx_bytes += len;
838 u64_stats_update_end(&stats->syncp);
839}
840
841static void macsec_decrypt_done(struct crypto_async_request *base, int err)
842{
843 struct sk_buff *skb = base->data;
844 struct net_device *dev = skb->dev;
845 struct macsec_dev *macsec = macsec_priv(dev);
846 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
c78ebe1d 847 struct macsec_rx_sc *rx_sc = rx_sa->sc;
863483c9 848 int len;
c09440f7
SD		 849 u32 pn;
850
851 aead_request_free(macsec_skb_cb(skb)->req);
852
b3bdc3ac
LR		 853 if (!err)
854 macsec_skb_cb(skb)->valid = true;
855
c09440f7
SD		 856 rcu_read_lock_bh();
857 pn = ntohl(macsec_ethhdr(skb)->packet_number);
858 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
859 rcu_read_unlock_bh();
860 kfree_skb(skb);
861 goto out;
862 }
863
864 macsec_finalize_skb(skb, macsec->secy.icv_len,
865 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
866 macsec_reset_skb(skb, macsec->secy.netdev);
867
868 len = skb->len;
863483c9 869 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
c09440f7 870 count_rx(dev, len);
c09440f7
SD		 871
872 rcu_read_unlock_bh();
873
874out:
875 macsec_rxsa_put(rx_sa);
c78ebe1d 876 macsec_rxsc_put(rx_sc);
c09440f7 877 dev_put(dev);
c09440f7
SD		 878}
879
880static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
881 struct net_device *dev,
882 struct macsec_rx_sa *rx_sa,
883 sci_t sci,
884 struct macsec_secy *secy)
885{
886 int ret;
5d9649b3 887 struct scatterlist *sg;
5294b830 888 struct sk_buff *trailer;
5d9649b3 889 unsigned char *iv;
c09440f7
SD		 890 struct aead_request *req;
891 struct macsec_eth_header *hdr;
a21ecf0e 892 u32 hdr_pn;
c09440f7
SD		 893 u16 icv_len = secy->icv_len;
894
895 macsec_skb_cb(skb)->valid = false;
896 skb = skb_share_check(skb, GFP_ATOMIC);
897 if (!skb)
c3b7d0bd 898 return ERR_PTR(-ENOMEM);
c09440f7 899
5294b830
JD		 900 ret = skb_cow_data(skb, 0, &trailer);
901 if (unlikely(ret < 0)) {
902 kfree_skb(skb);
903 return ERR_PTR(ret);
904 }
905 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
c09440f7
SD		 906 if (!req) {
907 kfree_skb(skb);
c3b7d0bd 908 return ERR_PTR(-ENOMEM);
c09440f7
SD		 909 }
910
911 hdr = (struct macsec_eth_header *)skb->data;
a21ecf0e
EM		 912 hdr_pn = ntohl(hdr->packet_number);
913
914 if (secy->xpn) {
915 pn_t recovered_pn = rx_sa->next_pn_halves;
916
917 recovered_pn.lower = hdr_pn;
918 if (hdr_pn < rx_sa->next_pn_halves.lower &&
919 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
920 recovered_pn.upper++;
921
922 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
923 rx_sa->key.salt);
924 } else {
925 macsec_fill_iv(iv, sci, hdr_pn);
926 }
c09440f7 927
5294b830 928 sg_init_table(sg, ret);
cda7ea69
JD		 929 ret = skb_to_sgvec(skb, sg, 0, skb->len);
930 if (unlikely(ret < 0)) {
5aba2ba5 931 aead_request_free(req);
cda7ea69
JD		 932 kfree_skb(skb);
933 return ERR_PTR(ret);
934 }
c09440f7
SD		 935
936 if (hdr->tci_an & MACSEC_TCI_E) {
937 /* confidentiality: ethernet + macsec header
938 * authenticated, encrypted payload
939 */
940 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
941
942 aead_request_set_crypt(req, sg, sg, len, iv);
943 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
944 skb = skb_unshare(skb, GFP_ATOMIC);
945 if (!skb) {
946 aead_request_free(req);
c3b7d0bd 947 return ERR_PTR(-ENOMEM);
c09440f7
SD		 948 }
949 } else {
950 /* integrity only: all headers + data authenticated */
951 aead_request_set_crypt(req, sg, sg, icv_len, iv);
952 aead_request_set_ad(req, skb->len - icv_len);
953 }
954
955 macsec_skb_cb(skb)->req = req;
c09440f7
SD		 956 skb->dev = dev;
957 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
958
959 dev_hold(dev);
960 ret = crypto_aead_decrypt(req);
961 if (ret == -EINPROGRESS) {
c3b7d0bd 962 return ERR_PTR(ret);
c09440f7
SD		 963 } else if (ret != 0) {
964 /* decryption/authentication failed
965 * 10.6 if validateFrames is disabled, deliver anyway
966 */
967 if (ret != -EBADMSG) {
968 kfree_skb(skb);
c3b7d0bd 969 skb = ERR_PTR(ret);
c09440f7
SD		 970 }
971 } else {
972 macsec_skb_cb(skb)->valid = true;
973 }
974 dev_put(dev);
975
976 aead_request_free(req);
977
978 return skb;
979}
980
981static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
982{
983 struct macsec_rx_sc *rx_sc;
984
985 for_each_rxsc(secy, rx_sc) {
986 if (rx_sc->sci == sci)
987 return rx_sc;
988 }
989
990 return NULL;
991}
992
993static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
994{
995 struct macsec_rx_sc *rx_sc;
996
997 for_each_rxsc_rtnl(secy, rx_sc) {
998 if (rx_sc->sci == sci)
999 return rx_sc;
1000 }
1001
1002 return NULL;
1003}
1004
3cf3227a 1005static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
c09440f7 1006{
3cf3227a
AT		 1007 /* Deliver to the uncontrolled port by default */
1008 enum rx_handler_result ret = RX_HANDLER_PASS;
c09440f7
SD		 1009 struct macsec_rxh_data *rxd;
1010 struct macsec_dev *macsec;
1011
1012 rcu_read_lock();
1013 rxd = macsec_data_rcu(skb->dev);
1014
1015 /* 10.6 If the management control validateFrames is not
1016 * Strict, frames without a SecTAG are received, counted, and
1017 * delivered to the Controlled Port
1018 */
1019 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1020 struct sk_buff *nskb;
c09440f7
SD		 1021 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1022
3cf3227a
AT		 1023 if (!macsec_is_offloaded(macsec) &&
1024 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
c09440f7
SD		 1025 u64_stats_update_begin(&secy_stats->syncp);
1026 secy_stats->stats.InPktsNoTag++;
1027 u64_stats_update_end(&secy_stats->syncp);
1028 continue;
1029 }
1030
1031 /* deliver on this port */
1032 nskb = skb_clone(skb, GFP_ATOMIC);
1033 if (!nskb)
1034 break;
1035
1036 nskb->dev = macsec->secy.netdev;
1037
863483c9 1038 if (netif_rx(nskb) == NET_RX_SUCCESS) {
c09440f7
SD		 1039 u64_stats_update_begin(&secy_stats->syncp);
1040 secy_stats->stats.InPktsUntagged++;
1041 u64_stats_update_end(&secy_stats->syncp);
c09440f7 1042 }
3cf3227a
AT		 1043
1044 if (netif_running(macsec->secy.netdev) &&
1045 macsec_is_offloaded(macsec)) {
1046 ret = RX_HANDLER_EXACT;
1047 goto out;
1048 }
c09440f7
SD		 1049 }
1050
3cf3227a 1051out:
c09440f7 1052 rcu_read_unlock();
3cf3227a 1053 return ret;
c09440f7
SD		 1054}
1055
1056static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1057{
1058 struct sk_buff *skb = *pskb;
1059 struct net_device *dev = skb->dev;
1060 struct macsec_eth_header *hdr;
1061 struct macsec_secy *secy = NULL;
1062 struct macsec_rx_sc *rx_sc;
1063 struct macsec_rx_sa *rx_sa;
1064 struct macsec_rxh_data *rxd;
1065 struct macsec_dev *macsec;
1066 sci_t sci;
a21ecf0e 1067 u32 hdr_pn;
c09440f7
SD		 1068 bool cbit;
1069 struct pcpu_rx_sc_stats *rxsc_stats;
1070 struct pcpu_secy_stats *secy_stats;
1071 bool pulled_sci;
5491e7c6 1072 int ret;
c09440f7
SD		 1073
1074 if (skb_headroom(skb) < ETH_HLEN)
1075 goto drop_direct;
1076
1077 hdr = macsec_ethhdr(skb);
3cf3227a
AT		 1078 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1079 return handle_not_macsec(skb);
c09440f7
SD		 1080
1081 skb = skb_unshare(skb, GFP_ATOMIC);
095c02da
AS		 1082 *pskb = skb;
1083 if (!skb)
c09440f7 1084 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1085
1086 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1087 if (!pulled_sci) {
1088 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1089 goto drop_direct;
1090 }
1091
1092 hdr = macsec_ethhdr(skb);
1093
1094 /* Frames with a SecTAG that has the TCI E bit set but the C
1095 * bit clear are discarded, as this reserved encoding is used
1096 * to identify frames with a SecTAG that are not to be
1097 * delivered to the Controlled Port.
1098 */
1099 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1100 return RX_HANDLER_PASS;
1101
1102 /* now, pull the extra length */
1103 if (hdr->tci_an & MACSEC_TCI_SC) {
1104 if (!pulled_sci)
1105 goto drop_direct;
1106 }
1107
1108 /* ethernet header is part of crypto processing */
1109 skb_push(skb, ETH_HLEN);
1110
1111 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1112 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1113 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1114
1115 rcu_read_lock();
1116 rxd = macsec_data_rcu(skb->dev);
1117
1118 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1119 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
7979472b 1120
c78ebe1d 1121 sc = sc ? macsec_rxsc_get(sc) : NULL;
c09440f7
SD		 1122
1123 if (sc) {
1124 secy = &macsec->secy;
1125 rx_sc = sc;
1126 break;
1127 }
1128 }
1129
1130 if (!secy)
1131 goto nosci;
1132
1133 dev = secy->netdev;
1134 macsec = macsec_priv(dev);
1135 secy_stats = this_cpu_ptr(macsec->stats);
1136 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1137
a21ecf0e 1138 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
c09440f7
SD		 1139 u64_stats_update_begin(&secy_stats->syncp);
1140 secy_stats->stats.InPktsBadTag++;
1141 u64_stats_update_end(&secy_stats->syncp);
1142 goto drop_nosa;
1143 }
1144
1145 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1146 if (!rx_sa) {
1147 /* 10.6.1 if the SA is not in use */
1148
1149 /* If validateFrames is Strict or the C bit in the
1150 * SecTAG is set, discard
1151 */
1152 if (hdr->tci_an & MACSEC_TCI_C ||
1153 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1154 u64_stats_update_begin(&rxsc_stats->syncp);
1155 rxsc_stats->stats.InPktsNotUsingSA++;
1156 u64_stats_update_end(&rxsc_stats->syncp);
1157 goto drop_nosa;
1158 }
1159
1160 /* not Strict, the frame (with the SecTAG and ICV
1161 * removed) is delivered to the Controlled Port.
1162 */
1163 u64_stats_update_begin(&rxsc_stats->syncp);
1164 rxsc_stats->stats.InPktsUnusedSA++;
1165 u64_stats_update_end(&rxsc_stats->syncp);
1166 goto deliver;
1167 }
1168
1169 /* First, PN check to avoid decrypting obviously wrong packets */
a21ecf0e 1170 hdr_pn = ntohl(hdr->packet_number);
c09440f7
SD		 1171 if (secy->replay_protect) {
1172 bool late;
1173
1174 spin_lock(&rx_sa->lock);
a21ecf0e
EM		 1175 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1176 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1177
1178 if (secy->xpn)
1179 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
c09440f7
SD		 1180 spin_unlock(&rx_sa->lock);
1181
1182 if (late) {
1183 u64_stats_update_begin(&rxsc_stats->syncp);
1184 rxsc_stats->stats.InPktsLate++;
1185 u64_stats_update_end(&rxsc_stats->syncp);
1186 goto drop;
1187 }
1188 }
1189
e3a3b626
BG		 1190 macsec_skb_cb(skb)->rx_sa = rx_sa;
1191
c09440f7
SD		 1192 /* Disabled && !changed text => skip validation */
1193 if (hdr->tci_an & MACSEC_TCI_C ||
1194 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1195 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1196
c3b7d0bd
SD		 1197 if (IS_ERR(skb)) {
1198 /* the decrypt callback needs the reference */
c78ebe1d 1199 if (PTR_ERR(skb) != -EINPROGRESS) {
c3b7d0bd 1200 macsec_rxsa_put(rx_sa);
c78ebe1d
SD		 1201 macsec_rxsc_put(rx_sc);
1202 }
c09440f7
SD		 1203 rcu_read_unlock();
1204 *pskb = NULL;
1205 return RX_HANDLER_CONSUMED;
1206 }
1207
a21ecf0e 1208 if (!macsec_post_decrypt(skb, secy, hdr_pn))
c09440f7
SD		 1209 goto drop;
1210
1211deliver:
1212 macsec_finalize_skb(skb, secy->icv_len,
1213 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1214 macsec_reset_skb(skb, secy->netdev);
1215
497f358a
SD		 1216 if (rx_sa)
1217 macsec_rxsa_put(rx_sa);
c78ebe1d 1218 macsec_rxsc_put(rx_sc);
5491e7c6 1219
ba56d8ce 1220 skb_orphan(skb);
5491e7c6
PA		 1221 ret = gro_cells_receive(&macsec->gro_cells, skb);
1222 if (ret == NET_RX_SUCCESS)
1223 count_rx(dev, skb->len);
1224 else
1225 macsec->secy.netdev->stats.rx_dropped++;
c09440f7
SD		 1226
1227 rcu_read_unlock();
1228
5491e7c6
PA		 1229 *pskb = NULL;
1230 return RX_HANDLER_CONSUMED;
c09440f7
SD		 1231
1232drop:
1233 macsec_rxsa_put(rx_sa);
1234drop_nosa:
c78ebe1d 1235 macsec_rxsc_put(rx_sc);
c09440f7
SD		 1236 rcu_read_unlock();
1237drop_direct:
1238 kfree_skb(skb);
1239 *pskb = NULL;
1240 return RX_HANDLER_CONSUMED;
1241
1242nosci:
1243 /* 10.6.1 if the SC is not found */
1244 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1245 if (!cbit)
1246 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1247 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1248
1249 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1250 struct sk_buff *nskb;
c09440f7
SD		 1251
1252 secy_stats = this_cpu_ptr(macsec->stats);
1253
1254 /* If validateFrames is Strict or the C bit in the
1255 * SecTAG is set, discard
1256 */
1257 if (cbit ||
1258 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1259 u64_stats_update_begin(&secy_stats->syncp);
1260 secy_stats->stats.InPktsNoSCI++;
1261 u64_stats_update_end(&secy_stats->syncp);
1262 continue;
1263 }
1264
1265 /* not strict, the frame (with the SecTAG and ICV
1266 * removed) is delivered to the Controlled Port.
1267 */
1268 nskb = skb_clone(skb, GFP_ATOMIC);
1269 if (!nskb)
1270 break;
1271
1272 macsec_reset_skb(nskb, macsec->secy.netdev);
1273
1274 ret = netif_rx(nskb);
1275 if (ret == NET_RX_SUCCESS) {
1276 u64_stats_update_begin(&secy_stats->syncp);
1277 secy_stats->stats.InPktsUnknownSCI++;
1278 u64_stats_update_end(&secy_stats->syncp);
1279 } else {
1280 macsec->secy.netdev->stats.rx_dropped++;
1281 }
1282 }
1283
1284 rcu_read_unlock();
1285 *pskb = skb;
1286 return RX_HANDLER_PASS;
1287}
1288
1289static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1290{
1291 struct crypto_aead *tfm;
1292 int ret;
1293
6052f7fb 1294 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
34aedfee
DC		 1295
1296 if (IS_ERR(tfm))
1297 return tfm;
c09440f7
SD		 1298
1299 ret = crypto_aead_setkey(tfm, key, key_len);
34aedfee
DC		 1300 if (ret < 0)
1301 goto fail;
c09440f7
SD		 1302
1303 ret = crypto_aead_setauthsize(tfm, icv_len);
34aedfee
DC		 1304 if (ret < 0)
1305 goto fail;
c09440f7
SD		 1306
1307 return tfm;
34aedfee
DC		 1308fail:
1309 crypto_free_aead(tfm);
1310 return ERR_PTR(ret);
c09440f7
SD		 1311}
1312
1313static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1314 int icv_len)
1315{
1316 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1317 if (!rx_sa->stats)
34aedfee 1318 return -ENOMEM;
c09440f7
SD		 1319
1320 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1321 if (IS_ERR(rx_sa->key.tfm)) {
c09440f7 1322 free_percpu(rx_sa->stats);
34aedfee 1323 return PTR_ERR(rx_sa->key.tfm);
c09440f7
SD		 1324 }
1325
48ef50fa 1326 rx_sa->ssci = MACSEC_UNDEF_SSCI;
c09440f7
SD		 1327 rx_sa->active = false;
1328 rx_sa->next_pn = 1;
e187246f 1329 refcount_set(&rx_sa->refcnt, 1);
c09440f7
SD		 1330 spin_lock_init(&rx_sa->lock);
1331
1332 return 0;
1333}
1334
1335static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1336{
1337 rx_sa->active = false;
1338
1339 macsec_rxsa_put(rx_sa);
1340}
1341
1342static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1343{
1344 int i;
1345
1346 for (i = 0; i < MACSEC_NUM_AN; i++) {
1347 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1348
1349 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1350 if (sa)
1351 clear_rx_sa(sa);
1352 }
1353
1354 macsec_rxsc_put(rx_sc);
1355}
1356
1357static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1358{
1359 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1360
1361 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1362 rx_sc;
1363 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1364 if (rx_sc->sci == sci) {
1365 if (rx_sc->active)
1366 secy->n_rx_sc--;
1367 rcu_assign_pointer(*rx_scp, rx_sc->next);
1368 return rx_sc;
1369 }
1370 }
1371
1372 return NULL;
1373}
1374
1375static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1376{
1377 struct macsec_rx_sc *rx_sc;
1378 struct macsec_dev *macsec;
1379 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1380 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1381 struct macsec_secy *secy;
1382
1383 list_for_each_entry(macsec, &rxd->secys, secys) {
1384 if (find_rx_sc_rtnl(&macsec->secy, sci))
1385 return ERR_PTR(-EEXIST);
1386 }
1387
1388 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1389 if (!rx_sc)
1390 return ERR_PTR(-ENOMEM);
1391
1392 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1393 if (!rx_sc->stats) {
1394 kfree(rx_sc);
1395 return ERR_PTR(-ENOMEM);
1396 }
1397
1398 rx_sc->sci = sci;
1399 rx_sc->active = true;
8676d76f 1400 refcount_set(&rx_sc->refcnt, 1);
c09440f7
SD		 1401
1402 secy = &macsec_priv(dev)->secy;
1403 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1404 rcu_assign_pointer(secy->rx_sc, rx_sc);
1405
1406 if (rx_sc->active)
1407 secy->n_rx_sc++;
1408
1409 return rx_sc;
1410}
1411
1412static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1413 int icv_len)
1414{
1415 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1416 if (!tx_sa->stats)
34aedfee 1417 return -ENOMEM;
c09440f7
SD		 1418
1419 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
34aedfee 1420 if (IS_ERR(tx_sa->key.tfm)) {
c09440f7 1421 free_percpu(tx_sa->stats);
34aedfee 1422 return PTR_ERR(tx_sa->key.tfm);
c09440f7
SD		 1423 }
1424
48ef50fa 1425 tx_sa->ssci = MACSEC_UNDEF_SSCI;
c09440f7 1426 tx_sa->active = false;
28206cdb 1427 refcount_set(&tx_sa->refcnt, 1);
c09440f7
SD		 1428 spin_lock_init(&tx_sa->lock);
1429
1430 return 0;
1431}
1432
1433static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1434{
1435 tx_sa->active = false;
1436
1437 macsec_txsa_put(tx_sa);
1438}
1439
489111e5 1440static struct genl_family macsec_fam;
c09440f7
SD		 1441
1442static struct net_device *get_dev_from_nl(struct net *net,
1443 struct nlattr **attrs)
1444{
1445 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1446 struct net_device *dev;
1447
1448 dev = __dev_get_by_index(net, ifindex);
1449 if (!dev)
1450 return ERR_PTR(-ENODEV);
1451
1452 if (!netif_is_macsec(dev))
1453 return ERR_PTR(-ENODEV);
1454
1455 return dev;
1456}
1457
1458static sci_t nla_get_sci(const struct nlattr *nla)
1459{
1460 return (__force sci_t)nla_get_u64(nla);
1461}
1462
f60d94c0
ND		 1463static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1464 int padattr)
c09440f7 1465{
f60d94c0 1466 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
c09440f7
SD		 1467}
1468
48ef50fa
EM		 1469static ssci_t nla_get_ssci(const struct nlattr *nla)
1470{
1471 return (__force ssci_t)nla_get_u32(nla);
1472}
1473
1474static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1475{
1476 return nla_put_u32(skb, attrtype, (__force u64)value);
1477}
1478
c09440f7
SD		 1479static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1480 struct nlattr **attrs,
1481 struct nlattr **tb_sa,
1482 struct net_device **devp,
1483 struct macsec_secy **secyp,
1484 struct macsec_tx_sc **scp,
1485 u8 *assoc_num)
1486{
1487 struct net_device *dev;
1488 struct macsec_secy *secy;
1489 struct macsec_tx_sc *tx_sc;
1490 struct macsec_tx_sa *tx_sa;
1491
1492 if (!tb_sa[MACSEC_SA_ATTR_AN])
1493 return ERR_PTR(-EINVAL);
1494
1495 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1496
1497 dev = get_dev_from_nl(net, attrs);
1498 if (IS_ERR(dev))
1499 return ERR_CAST(dev);
1500
1501 if (*assoc_num >= MACSEC_NUM_AN)
1502 return ERR_PTR(-EINVAL);
1503
1504 secy = &macsec_priv(dev)->secy;
1505 tx_sc = &secy->tx_sc;
1506
1507 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1508 if (!tx_sa)
1509 return ERR_PTR(-ENODEV);
1510
1511 *devp = dev;
1512 *scp = tx_sc;
1513 *secyp = secy;
1514 return tx_sa;
1515}
1516
1517static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1518 struct nlattr **attrs,
1519 struct nlattr **tb_rxsc,
1520 struct net_device **devp,
1521 struct macsec_secy **secyp)
1522{
1523 struct net_device *dev;
1524 struct macsec_secy *secy;
1525 struct macsec_rx_sc *rx_sc;
1526 sci_t sci;
1527
1528 dev = get_dev_from_nl(net, attrs);
1529 if (IS_ERR(dev))
1530 return ERR_CAST(dev);
1531
1532 secy = &macsec_priv(dev)->secy;
1533
1534 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1535 return ERR_PTR(-EINVAL);
1536
1537 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1538 rx_sc = find_rx_sc_rtnl(secy, sci);
1539 if (!rx_sc)
1540 return ERR_PTR(-ENODEV);
1541
1542 *secyp = secy;
1543 *devp = dev;
1544
1545 return rx_sc;
1546}
1547
1548static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1549 struct nlattr **attrs,
1550 struct nlattr **tb_rxsc,
1551 struct nlattr **tb_sa,
1552 struct net_device **devp,
1553 struct macsec_secy **secyp,
1554 struct macsec_rx_sc **scp,
1555 u8 *assoc_num)
1556{
1557 struct macsec_rx_sc *rx_sc;
1558 struct macsec_rx_sa *rx_sa;
1559
1560 if (!tb_sa[MACSEC_SA_ATTR_AN])
1561 return ERR_PTR(-EINVAL);
1562
1563 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1564 if (*assoc_num >= MACSEC_NUM_AN)
1565 return ERR_PTR(-EINVAL);
1566
1567 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1568 if (IS_ERR(rx_sc))
1569 return ERR_CAST(rx_sc);
1570
1571 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1572 if (!rx_sa)
1573 return ERR_PTR(-ENODEV);
1574
1575 *scp = rx_sc;
1576 return rx_sa;
1577}
1578
c09440f7
SD		 1579static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1580 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1581 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1582 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
dcb780fb 1583 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
c09440f7
SD		 1584};
1585
1586static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1587 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1588 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1589};
1590
1591static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1592 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1593 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
48ef50fa 1594 [MACSEC_SA_ATTR_PN] = { .type = NLA_MIN_LEN, .len = 4 },
8acca6ac
SD		 1595 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1596 .len = MACSEC_KEYID_LEN, },
c09440f7 1597 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
e8660ded 1598 .len = MACSEC_MAX_KEY_LEN, },
48ef50fa
EM		 1599 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1600 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1601 .len = MACSEC_SALT_LEN, },
c09440f7
SD		 1602};
1603
dcb780fb
AT		 1604static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1605 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1606};
1607
3cf3227a
AT		 1608/* Offloads an operation to a device driver */
1609static int macsec_offload(int (* const func)(struct macsec_context *),
1610 struct macsec_context *ctx)
1611{
1612 int ret;
1613
1614 if (unlikely(!func))
1615 return 0;
1616
1617 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1618 mutex_lock(&ctx->phydev->lock);
1619
1620 /* Phase I: prepare. The drive should fail here if there are going to be
1621 * issues in the commit phase.
1622 */
1623 ctx->prepare = true;
1624 ret = (*func)(ctx);
1625 if (ret)
1626 goto phy_unlock;
1627
1628 /* Phase II: commit. This step cannot fail. */
1629 ctx->prepare = false;
1630 ret = (*func)(ctx);
1631 /* This should never happen: commit is not allowed to fail */
1632 if (unlikely(ret))
1633 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1634
1635phy_unlock:
1636 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1637 mutex_unlock(&ctx->phydev->lock);
1638
1639 return ret;
1640}
1641
c09440f7
SD		 1642static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1643{
1644 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1645 return -EINVAL;
1646
8cb08174 1647 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
c09440f7
SD		 1648 return -EINVAL;
1649
1650 return 0;
1651}
1652
1653static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1654{
1655 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1656 return -EINVAL;
1657
8cb08174 1658 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
c09440f7
SD		 1659 return -EINVAL;
1660
1661 return 0;
1662}
1663
1664static bool validate_add_rxsa(struct nlattr **attrs)
1665{
1666 if (!attrs[MACSEC_SA_ATTR_AN] ||
1667 !attrs[MACSEC_SA_ATTR_KEY] ||
1668 !attrs[MACSEC_SA_ATTR_KEYID])
1669 return false;
1670
1671 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1672 return false;
1673
48ef50fa
EM		 1674 if (attrs[MACSEC_SA_ATTR_PN] &&
1675 *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0)
c09440f7
SD		 1676 return false;
1677
1678 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1679 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1680 return false;
1681 }
1682
8acca6ac
SD		 1683 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1684 return false;
1685
c09440f7
SD		 1686 return true;
1687}
1688
1689static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1690{
1691 struct net_device *dev;
1692 struct nlattr **attrs = info->attrs;
1693 struct macsec_secy *secy;
1694 struct macsec_rx_sc *rx_sc;
1695 struct macsec_rx_sa *rx_sa;
1696 unsigned char assoc_num;
48ef50fa 1697 int pn_len;
c09440f7
SD		 1698 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1699 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
34aedfee 1700 int err;
c09440f7
SD		 1701
1702 if (!attrs[MACSEC_ATTR_IFINDEX])
1703 return -EINVAL;
1704
1705 if (parse_sa_config(attrs, tb_sa))
1706 return -EINVAL;
1707
1708 if (parse_rxsc_config(attrs, tb_rxsc))
1709 return -EINVAL;
1710
1711 if (!validate_add_rxsa(tb_sa))
1712 return -EINVAL;
1713
1714 rtnl_lock();
1715 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
36b232c8 1716 if (IS_ERR(rx_sc)) {
c09440f7
SD		 1717 rtnl_unlock();
1718 return PTR_ERR(rx_sc);
1719 }
1720
1721 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1722
1723 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1724 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1725 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1726 rtnl_unlock();
1727 return -EINVAL;
1728 }
1729
48ef50fa
EM		 1730 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1731 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1732 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1733 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1734 rtnl_unlock();
1735 return -EINVAL;
1736 }
1737
1738 if (secy->xpn) {
1739 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1740 rtnl_unlock();
1741 return -EINVAL;
1742 }
1743
1744 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1745 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1746 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1747 MACSEC_SA_ATTR_SALT);
1748 rtnl_unlock();
1749 return -EINVAL;
1750 }
1751 }
1752
c09440f7
SD		 1753 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1754 if (rx_sa) {
1755 rtnl_unlock();
1756 return -EBUSY;
1757 }
1758
1759 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
34aedfee 1760 if (!rx_sa) {
c09440f7
SD		 1761 rtnl_unlock();
1762 return -ENOMEM;
1763 }
1764
34aedfee
DC		 1765 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1766 secy->key_len, secy->icv_len);
1767 if (err < 0) {
1768 kfree(rx_sa);
1769 rtnl_unlock();
1770 return err;
1771 }
1772
c09440f7
SD		 1773 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1774 spin_lock_bh(&rx_sa->lock);
48ef50fa 1775 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 1776 spin_unlock_bh(&rx_sa->lock);
1777 }
1778
1779 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1780 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1781
c09440f7 1782 rx_sa->sc = rx_sc;
3cf3227a
AT		 1783
1784 /* If h/w offloading is available, propagate to the device */
1785 if (macsec_is_offloaded(netdev_priv(dev))) {
1786 const struct macsec_ops *ops;
1787 struct macsec_context ctx;
1788
1789 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1790 if (!ops) {
1791 err = -EOPNOTSUPP;
1792 goto cleanup;
1793 }
1794
1795 ctx.sa.assoc_num = assoc_num;
1796 ctx.sa.rx_sa = rx_sa;
182879f8 1797 ctx.secy = secy;
3cf3227a
AT		 1798 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1799 MACSEC_KEYID_LEN);
1800
1801 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1802 if (err)
1803 goto cleanup;
1804 }
1805
48ef50fa
EM		 1806 if (secy->xpn) {
1807 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1808 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1809 MACSEC_SALT_LEN);
1810 }
1811
3cf3227a 1812 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 1813 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1814
1815 rtnl_unlock();
1816
1817 return 0;
3cf3227a
AT		 1818
1819cleanup:
1820 kfree(rx_sa);
1821 rtnl_unlock();
1822 return err;
c09440f7
SD		 1823}
1824
1825static bool validate_add_rxsc(struct nlattr **attrs)
1826{
1827 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1828 return false;
1829
1830 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1831 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1832 return false;
1833 }
1834
1835 return true;
1836}
1837
1838static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1839{
1840 struct net_device *dev;
1841 sci_t sci = MACSEC_UNDEF_SCI;
1842 struct nlattr **attrs = info->attrs;
1843 struct macsec_rx_sc *rx_sc;
1844 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
182879f8 1845 struct macsec_secy *secy;
3cf3227a
AT		 1846 bool was_active;
1847 int ret;
c09440f7
SD		 1848
1849 if (!attrs[MACSEC_ATTR_IFINDEX])
1850 return -EINVAL;
1851
1852 if (parse_rxsc_config(attrs, tb_rxsc))
1853 return -EINVAL;
1854
1855 if (!validate_add_rxsc(tb_rxsc))
1856 return -EINVAL;
1857
1858 rtnl_lock();
1859 dev = get_dev_from_nl(genl_info_net(info), attrs);
1860 if (IS_ERR(dev)) {
1861 rtnl_unlock();
1862 return PTR_ERR(dev);
1863 }
1864
182879f8 1865 secy = &macsec_priv(dev)->secy;
c09440f7
SD		 1866 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1867
1868 rx_sc = create_rx_sc(dev, sci);
1869 if (IS_ERR(rx_sc)) {
1870 rtnl_unlock();
1871 return PTR_ERR(rx_sc);
1872 }
1873
3cf3227a 1874 was_active = rx_sc->active;
c09440f7
SD		 1875 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1876 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1877
3cf3227a
AT		 1878 if (macsec_is_offloaded(netdev_priv(dev))) {
1879 const struct macsec_ops *ops;
1880 struct macsec_context ctx;
1881
1882 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1883 if (!ops) {
1884 ret = -EOPNOTSUPP;
1885 goto cleanup;
1886 }
1887
1888 ctx.rx_sc = rx_sc;
182879f8 1889 ctx.secy = secy;
3cf3227a
AT		 1890
1891 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1892 if (ret)
1893 goto cleanup;
1894 }
1895
c09440f7
SD		 1896 rtnl_unlock();
1897
1898 return 0;
3cf3227a
AT		 1899
1900cleanup:
1901 rx_sc->active = was_active;
1902 rtnl_unlock();
1903 return ret;
c09440f7
SD		 1904}
1905
1906static bool validate_add_txsa(struct nlattr **attrs)
1907{
1908 if (!attrs[MACSEC_SA_ATTR_AN] ||
1909 !attrs[MACSEC_SA_ATTR_PN] ||
1910 !attrs[MACSEC_SA_ATTR_KEY] ||
1911 !attrs[MACSEC_SA_ATTR_KEYID])
1912 return false;
1913
1914 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1915 return false;
1916
1917 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1918 return false;
1919
1920 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1921 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1922 return false;
1923 }
1924
8acca6ac
SD		 1925 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1926 return false;
1927
c09440f7
SD		 1928 return true;
1929}
1930
1931static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1932{
1933 struct net_device *dev;
1934 struct nlattr **attrs = info->attrs;
1935 struct macsec_secy *secy;
1936 struct macsec_tx_sc *tx_sc;
1937 struct macsec_tx_sa *tx_sa;
1938 unsigned char assoc_num;
48ef50fa 1939 int pn_len;
c09440f7 1940 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 1941 bool was_operational;
34aedfee 1942 int err;
c09440f7
SD		 1943
1944 if (!attrs[MACSEC_ATTR_IFINDEX])
1945 return -EINVAL;
1946
1947 if (parse_sa_config(attrs, tb_sa))
1948 return -EINVAL;
1949
1950 if (!validate_add_txsa(tb_sa))
1951 return -EINVAL;
1952
1953 rtnl_lock();
1954 dev = get_dev_from_nl(genl_info_net(info), attrs);
1955 if (IS_ERR(dev)) {
1956 rtnl_unlock();
1957 return PTR_ERR(dev);
1958 }
1959
1960 secy = &macsec_priv(dev)->secy;
1961 tx_sc = &secy->tx_sc;
1962
1963 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1964
1965 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1966 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1967 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1968 rtnl_unlock();
1969 return -EINVAL;
1970 }
1971
48ef50fa
EM		 1972 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1973 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1974 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
1975 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1976 rtnl_unlock();
1977 return -EINVAL;
1978 }
1979
1980 if (secy->xpn) {
1981 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1982 rtnl_unlock();
1983 return -EINVAL;
1984 }
1985
1986 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1987 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
1988 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1989 MACSEC_SA_ATTR_SALT);
1990 rtnl_unlock();
1991 return -EINVAL;
1992 }
1993 }
1994
c09440f7
SD		 1995 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
1996 if (tx_sa) {
1997 rtnl_unlock();
1998 return -EBUSY;
1999 }
2000
2001 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
34aedfee 2002 if (!tx_sa) {
c09440f7
SD		 2003 rtnl_unlock();
2004 return -ENOMEM;
2005 }
2006
34aedfee
DC		 2007 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2008 secy->key_len, secy->icv_len);
2009 if (err < 0) {
2010 kfree(tx_sa);
2011 rtnl_unlock();
2012 return err;
2013 }
2014
c09440f7 2015 spin_lock_bh(&tx_sa->lock);
48ef50fa 2016 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2017 spin_unlock_bh(&tx_sa->lock);
2018
2019 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2020 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2021
3cf3227a 2022 was_operational = secy->operational;
c09440f7
SD		 2023 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2024 secy->operational = true;
2025
3cf3227a
AT		 2026 /* If h/w offloading is available, propagate to the device */
2027 if (macsec_is_offloaded(netdev_priv(dev))) {
2028 const struct macsec_ops *ops;
2029 struct macsec_context ctx;
2030
2031 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2032 if (!ops) {
2033 err = -EOPNOTSUPP;
2034 goto cleanup;
2035 }
2036
2037 ctx.sa.assoc_num = assoc_num;
2038 ctx.sa.tx_sa = tx_sa;
182879f8 2039 ctx.secy = secy;
3cf3227a
AT		 2040 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2041 MACSEC_KEYID_LEN);
2042
2043 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2044 if (err)
2045 goto cleanup;
2046 }
2047
48ef50fa
EM		 2048 if (secy->xpn) {
2049 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2050 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2051 MACSEC_SALT_LEN);
2052 }
2053
3cf3227a 2054 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
c09440f7
SD		 2055 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2056
2057 rtnl_unlock();
2058
2059 return 0;
3cf3227a
AT		 2060
2061cleanup:
2062 secy->operational = was_operational;
2063 kfree(tx_sa);
2064 rtnl_unlock();
2065 return err;
c09440f7
SD		 2066}
2067
2068static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2069{
2070 struct nlattr **attrs = info->attrs;
2071 struct net_device *dev;
2072 struct macsec_secy *secy;
2073 struct macsec_rx_sc *rx_sc;
2074 struct macsec_rx_sa *rx_sa;
2075 u8 assoc_num;
2076 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2077 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2078 int ret;
c09440f7
SD		 2079
2080 if (!attrs[MACSEC_ATTR_IFINDEX])
2081 return -EINVAL;
2082
2083 if (parse_sa_config(attrs, tb_sa))
2084 return -EINVAL;
2085
2086 if (parse_rxsc_config(attrs, tb_rxsc))
2087 return -EINVAL;
2088
2089 rtnl_lock();
2090 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2091 &dev, &secy, &rx_sc, &assoc_num);
2092 if (IS_ERR(rx_sa)) {
2093 rtnl_unlock();
2094 return PTR_ERR(rx_sa);
2095 }
2096
2097 if (rx_sa->active) {
2098 rtnl_unlock();
2099 return -EBUSY;
2100 }
2101
3cf3227a
AT		 2102 /* If h/w offloading is available, propagate to the device */
2103 if (macsec_is_offloaded(netdev_priv(dev))) {
2104 const struct macsec_ops *ops;
2105 struct macsec_context ctx;
2106
2107 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2108 if (!ops) {
2109 ret = -EOPNOTSUPP;
2110 goto cleanup;
2111 }
2112
2113 ctx.sa.assoc_num = assoc_num;
2114 ctx.sa.rx_sa = rx_sa;
182879f8 2115 ctx.secy = secy;
3cf3227a
AT		 2116
2117 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2118 if (ret)
2119 goto cleanup;
2120 }
2121
c09440f7
SD		 2122 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2123 clear_rx_sa(rx_sa);
2124
2125 rtnl_unlock();
2126
2127 return 0;
3cf3227a
AT		 2128
2129cleanup:
2130 rtnl_unlock();
2131 return ret;
c09440f7
SD		 2132}
2133
2134static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2135{
2136 struct nlattr **attrs = info->attrs;
2137 struct net_device *dev;
2138 struct macsec_secy *secy;
2139 struct macsec_rx_sc *rx_sc;
2140 sci_t sci;
2141 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a 2142 int ret;
c09440f7
SD		 2143
2144 if (!attrs[MACSEC_ATTR_IFINDEX])
2145 return -EINVAL;
2146
2147 if (parse_rxsc_config(attrs, tb_rxsc))
2148 return -EINVAL;
2149
2150 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2151 return -EINVAL;
2152
2153 rtnl_lock();
2154 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2155 if (IS_ERR(dev)) {
2156 rtnl_unlock();
2157 return PTR_ERR(dev);
2158 }
2159
2160 secy = &macsec_priv(dev)->secy;
2161 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2162
2163 rx_sc = del_rx_sc(secy, sci);
2164 if (!rx_sc) {
2165 rtnl_unlock();
2166 return -ENODEV;
2167 }
2168
3cf3227a
AT		 2169 /* If h/w offloading is available, propagate to the device */
2170 if (macsec_is_offloaded(netdev_priv(dev))) {
2171 const struct macsec_ops *ops;
2172 struct macsec_context ctx;
2173
2174 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2175 if (!ops) {
2176 ret = -EOPNOTSUPP;
2177 goto cleanup;
2178 }
2179
2180 ctx.rx_sc = rx_sc;
182879f8 2181 ctx.secy = secy;
3cf3227a
AT		 2182 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2183 if (ret)
2184 goto cleanup;
2185 }
2186
c09440f7
SD		 2187 free_rx_sc(rx_sc);
2188 rtnl_unlock();
2189
2190 return 0;
3cf3227a
AT		 2191
2192cleanup:
2193 rtnl_unlock();
2194 return ret;
c09440f7
SD		 2195}
2196
2197static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2198{
2199 struct nlattr **attrs = info->attrs;
2200 struct net_device *dev;
2201 struct macsec_secy *secy;
2202 struct macsec_tx_sc *tx_sc;
2203 struct macsec_tx_sa *tx_sa;
2204 u8 assoc_num;
2205 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2206 int ret;
c09440f7
SD		 2207
2208 if (!attrs[MACSEC_ATTR_IFINDEX])
2209 return -EINVAL;
2210
2211 if (parse_sa_config(attrs, tb_sa))
2212 return -EINVAL;
2213
2214 rtnl_lock();
2215 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2216 &dev, &secy, &tx_sc, &assoc_num);
2217 if (IS_ERR(tx_sa)) {
2218 rtnl_unlock();
2219 return PTR_ERR(tx_sa);
2220 }
2221
2222 if (tx_sa->active) {
2223 rtnl_unlock();
2224 return -EBUSY;
2225 }
2226
3cf3227a
AT		 2227 /* If h/w offloading is available, propagate to the device */
2228 if (macsec_is_offloaded(netdev_priv(dev))) {
2229 const struct macsec_ops *ops;
2230 struct macsec_context ctx;
2231
2232 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2233 if (!ops) {
2234 ret = -EOPNOTSUPP;
2235 goto cleanup;
2236 }
2237
2238 ctx.sa.assoc_num = assoc_num;
2239 ctx.sa.tx_sa = tx_sa;
182879f8 2240 ctx.secy = secy;
3cf3227a
AT		 2241
2242 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2243 if (ret)
2244 goto cleanup;
2245 }
2246
c09440f7
SD		 2247 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2248 clear_tx_sa(tx_sa);
2249
2250 rtnl_unlock();
2251
2252 return 0;
3cf3227a
AT		 2253
2254cleanup:
2255 rtnl_unlock();
2256 return ret;
c09440f7
SD		 2257}
2258
2259static bool validate_upd_sa(struct nlattr **attrs)
2260{
2261 if (!attrs[MACSEC_SA_ATTR_AN] ||
2262 attrs[MACSEC_SA_ATTR_KEY] ||
48ef50fa
EM		 2263 attrs[MACSEC_SA_ATTR_KEYID] ||
2264 attrs[MACSEC_SA_ATTR_SSCI] ||
2265 attrs[MACSEC_SA_ATTR_SALT])
c09440f7
SD		 2266 return false;
2267
2268 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2269 return false;
2270
2271 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2272 return false;
2273
2274 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2275 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2276 return false;
2277 }
2278
2279 return true;
2280}
2281
2282static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2283{
2284 struct nlattr **attrs = info->attrs;
2285 struct net_device *dev;
2286 struct macsec_secy *secy;
2287 struct macsec_tx_sc *tx_sc;
2288 struct macsec_tx_sa *tx_sa;
2289 u8 assoc_num;
2290 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2291 bool was_operational, was_active;
a21ecf0e 2292 pn_t prev_pn;
3cf3227a 2293 int ret = 0;
c09440f7 2294
a21ecf0e
EM		 2295 prev_pn.full64 = 0;
2296
c09440f7
SD		 2297 if (!attrs[MACSEC_ATTR_IFINDEX])
2298 return -EINVAL;
2299
2300 if (parse_sa_config(attrs, tb_sa))
2301 return -EINVAL;
2302
2303 if (!validate_upd_sa(tb_sa))
2304 return -EINVAL;
2305
2306 rtnl_lock();
2307 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2308 &dev, &secy, &tx_sc, &assoc_num);
2309 if (IS_ERR(tx_sa)) {
2310 rtnl_unlock();
2311 return PTR_ERR(tx_sa);
2312 }
2313
2314 if (tb_sa[MACSEC_SA_ATTR_PN]) {
48ef50fa
EM		 2315 int pn_len;
2316
2317 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2318 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2319 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2320 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2321 rtnl_unlock();
2322 return -EINVAL;
2323 }
2324
c09440f7 2325 spin_lock_bh(&tx_sa->lock);
a21ecf0e 2326 prev_pn = tx_sa->next_pn_halves;
48ef50fa 2327 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2328 spin_unlock_bh(&tx_sa->lock);
2329 }
2330
3cf3227a 2331 was_active = tx_sa->active;
c09440f7
SD		 2332 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2333 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2334
3cf3227a 2335 was_operational = secy->operational;
c09440f7
SD		 2336 if (assoc_num == tx_sc->encoding_sa)
2337 secy->operational = tx_sa->active;
2338
3cf3227a
AT		 2339 /* If h/w offloading is available, propagate to the device */
2340 if (macsec_is_offloaded(netdev_priv(dev))) {
2341 const struct macsec_ops *ops;
2342 struct macsec_context ctx;
2343
2344 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2345 if (!ops) {
2346 ret = -EOPNOTSUPP;
2347 goto cleanup;
2348 }
2349
2350 ctx.sa.assoc_num = assoc_num;
2351 ctx.sa.tx_sa = tx_sa;
182879f8 2352 ctx.secy = secy;
3cf3227a
AT		 2353
2354 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2355 if (ret)
2356 goto cleanup;
2357 }
2358
c09440f7
SD		 2359 rtnl_unlock();
2360
2361 return 0;
3cf3227a
AT		 2362
2363cleanup:
2364 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2365 spin_lock_bh(&tx_sa->lock);
a21ecf0e 2366 tx_sa->next_pn_halves = prev_pn;
3cf3227a
AT		 2367 spin_unlock_bh(&tx_sa->lock);
2368 }
2369 tx_sa->active = was_active;
2370 secy->operational = was_operational;
2371 rtnl_unlock();
2372 return ret;
c09440f7
SD		 2373}
2374
2375static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2376{
2377 struct nlattr **attrs = info->attrs;
2378 struct net_device *dev;
2379 struct macsec_secy *secy;
2380 struct macsec_rx_sc *rx_sc;
2381 struct macsec_rx_sa *rx_sa;
2382 u8 assoc_num;
2383 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2384 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
3cf3227a 2385 bool was_active;
a21ecf0e 2386 pn_t prev_pn;
3cf3227a 2387 int ret = 0;
c09440f7 2388
a21ecf0e
EM		 2389 prev_pn.full64 = 0;
2390
c09440f7
SD		 2391 if (!attrs[MACSEC_ATTR_IFINDEX])
2392 return -EINVAL;
2393
2394 if (parse_rxsc_config(attrs, tb_rxsc))
2395 return -EINVAL;
2396
2397 if (parse_sa_config(attrs, tb_sa))
2398 return -EINVAL;
2399
2400 if (!validate_upd_sa(tb_sa))
2401 return -EINVAL;
2402
2403 rtnl_lock();
2404 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2405 &dev, &secy, &rx_sc, &assoc_num);
2406 if (IS_ERR(rx_sa)) {
2407 rtnl_unlock();
2408 return PTR_ERR(rx_sa);
2409 }
2410
2411 if (tb_sa[MACSEC_SA_ATTR_PN]) {
48ef50fa
EM		 2412 int pn_len;
2413
2414 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2415 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2416 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2417 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2418 rtnl_unlock();
2419 return -EINVAL;
2420 }
2421
c09440f7 2422 spin_lock_bh(&rx_sa->lock);
a21ecf0e 2423 prev_pn = rx_sa->next_pn_halves;
48ef50fa 2424 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
c09440f7
SD		 2425 spin_unlock_bh(&rx_sa->lock);
2426 }
2427
3cf3227a 2428 was_active = rx_sa->active;
c09440f7
SD		 2429 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2430 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2431
3cf3227a
AT		 2432 /* If h/w offloading is available, propagate to the device */
2433 if (macsec_is_offloaded(netdev_priv(dev))) {
2434 const struct macsec_ops *ops;
2435 struct macsec_context ctx;
2436
2437 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2438 if (!ops) {
2439 ret = -EOPNOTSUPP;
2440 goto cleanup;
2441 }
2442
2443 ctx.sa.assoc_num = assoc_num;
2444 ctx.sa.rx_sa = rx_sa;
182879f8 2445 ctx.secy = secy;
3cf3227a
AT		 2446
2447 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2448 if (ret)
2449 goto cleanup;
2450 }
2451
c09440f7
SD		 2452 rtnl_unlock();
2453 return 0;
3cf3227a
AT		 2454
2455cleanup:
2456 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2457 spin_lock_bh(&rx_sa->lock);
a21ecf0e 2458 rx_sa->next_pn_halves = prev_pn;
3cf3227a
AT		 2459 spin_unlock_bh(&rx_sa->lock);
2460 }
2461 rx_sa->active = was_active;
2462 rtnl_unlock();
2463 return ret;
c09440f7
SD		 2464}
2465
2466static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2467{
2468 struct nlattr **attrs = info->attrs;
2469 struct net_device *dev;
2470 struct macsec_secy *secy;
2471 struct macsec_rx_sc *rx_sc;
2472 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
3cf3227a
AT		 2473 unsigned int prev_n_rx_sc;
2474 bool was_active;
2475 int ret;
c09440f7
SD		 2476
2477 if (!attrs[MACSEC_ATTR_IFINDEX])
2478 return -EINVAL;
2479
2480 if (parse_rxsc_config(attrs, tb_rxsc))
2481 return -EINVAL;
2482
2483 if (!validate_add_rxsc(tb_rxsc))
2484 return -EINVAL;
2485
2486 rtnl_lock();
2487 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2488 if (IS_ERR(rx_sc)) {
2489 rtnl_unlock();
2490 return PTR_ERR(rx_sc);
2491 }
2492
3cf3227a
AT		 2493 was_active = rx_sc->active;
2494 prev_n_rx_sc = secy->n_rx_sc;
c09440f7
SD		 2495 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2496 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2497
2498 if (rx_sc->active != new)
2499 secy->n_rx_sc += new ? 1 : -1;
2500
2501 rx_sc->active = new;
2502 }
2503
3cf3227a
AT		 2504 /* If h/w offloading is available, propagate to the device */
2505 if (macsec_is_offloaded(netdev_priv(dev))) {
2506 const struct macsec_ops *ops;
2507 struct macsec_context ctx;
2508
2509 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2510 if (!ops) {
2511 ret = -EOPNOTSUPP;
2512 goto cleanup;
2513 }
2514
2515 ctx.rx_sc = rx_sc;
182879f8 2516 ctx.secy = secy;
3cf3227a
AT		 2517
2518 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2519 if (ret)
2520 goto cleanup;
2521 }
2522
c09440f7
SD		 2523 rtnl_unlock();
2524
2525 return 0;
3cf3227a
AT		 2526
2527cleanup:
2528 secy->n_rx_sc = prev_n_rx_sc;
2529 rx_sc->active = was_active;
2530 rtnl_unlock();
2531 return ret;
c09440f7
SD		 2532}
2533
dcb780fb
AT		 2534static bool macsec_is_configured(struct macsec_dev *macsec)
2535{
2536 struct macsec_secy *secy = &macsec->secy;
2537 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2538 int i;
2539
2540 if (secy->n_rx_sc > 0)
2541 return true;
2542
2543 for (i = 0; i < MACSEC_NUM_AN; i++)
2544 if (tx_sc->sa[i])
2545 return true;
2546
2547 return false;
2548}
2549
2550static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2551{
2552 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2553 enum macsec_offload offload, prev_offload;
2554 int (*func)(struct macsec_context *ctx);
2555 struct nlattr **attrs = info->attrs;
a249f805 2556 struct net_device *dev;
dcb780fb
AT		 2557 const struct macsec_ops *ops;
2558 struct macsec_context ctx;
2559 struct macsec_dev *macsec;
dcb780fb
AT		 2560 int ret;
2561
2562 if (!attrs[MACSEC_ATTR_IFINDEX])
2563 return -EINVAL;
2564
2565 if (!attrs[MACSEC_ATTR_OFFLOAD])
2566 return -EINVAL;
2567
2568 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2569 attrs[MACSEC_ATTR_OFFLOAD],
2570 macsec_genl_offload_policy, NULL))
2571 return -EINVAL;
2572
2573 dev = get_dev_from_nl(genl_info_net(info), attrs);
2574 if (IS_ERR(dev))
2575 return PTR_ERR(dev);
2576 macsec = macsec_priv(dev);
2577
2578 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2579 if (macsec->offload == offload)
2580 return 0;
2581
2582 /* Check if the offloading mode is supported by the underlying layers */
2583 if (offload != MACSEC_OFFLOAD_OFF &&
2584 !macsec_check_offload(offload, macsec))
2585 return -EOPNOTSUPP;
2586
dcb780fb
AT		 2587 /* Check if the net device is busy. */
2588 if (netif_running(dev))
2589 return -EBUSY;
2590
2591 rtnl_lock();
2592
2593 prev_offload = macsec->offload;
2594 macsec->offload = offload;
2595
2596 /* Check if the device already has rules configured: we do not support
2597 * rules migration.
2598 */
2599 if (macsec_is_configured(macsec)) {
2600 ret = -EBUSY;
2601 goto rollback;
2602 }
2603
2604 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2605 macsec, &ctx);
2606 if (!ops) {
2607 ret = -EOPNOTSUPP;
2608 goto rollback;
2609 }
2610
2611 if (prev_offload == MACSEC_OFFLOAD_OFF)
2612 func = ops->mdo_add_secy;
2613 else
2614 func = ops->mdo_del_secy;
2615
2616 ctx.secy = &macsec->secy;
2617 ret = macsec_offload(func, &ctx);
2618 if (ret)
2619 goto rollback;
2620
2621 rtnl_unlock();
2622 return 0;
2623
2624rollback:
2625 macsec->offload = prev_offload;
2626
2627 rtnl_unlock();
2628 return ret;
2629}
2630
c09440f7 2631static int copy_tx_sa_stats(struct sk_buff *skb,
7979472b 2632 struct macsec_tx_sa_stats __percpu *pstats)
c09440f7
SD		 2633{
2634 struct macsec_tx_sa_stats sum = {0, };
2635 int cpu;
2636
2637 for_each_possible_cpu(cpu) {
2638 const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2639
2640 sum.OutPktsProtected += stats->OutPktsProtected;
2641 sum.OutPktsEncrypted += stats->OutPktsEncrypted;
2642 }
2643
2644 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
2645 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
2646 return -EMSGSIZE;
2647
2648 return 0;
2649}
2650
e1427237
FW		 2651static noinline_for_stack int
2652copy_rx_sa_stats(struct sk_buff *skb,
2653 struct macsec_rx_sa_stats __percpu *pstats)
c09440f7
SD		 2654{
2655 struct macsec_rx_sa_stats sum = {0, };
2656 int cpu;
2657
2658 for_each_possible_cpu(cpu) {
2659 const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
2660
2661 sum.InPktsOK += stats->InPktsOK;
2662 sum.InPktsInvalid += stats->InPktsInvalid;
2663 sum.InPktsNotValid += stats->InPktsNotValid;
2664 sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
2665 sum.InPktsUnusedSA += stats->InPktsUnusedSA;
2666 }
2667
2668 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
2669 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
2670 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
2671 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
2672 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
2673 return -EMSGSIZE;
2674
2675 return 0;
2676}
2677
e1427237
FW		 2678static noinline_for_stack int
2679copy_rx_sc_stats(struct sk_buff *skb, struct pcpu_rx_sc_stats __percpu *pstats)
c09440f7
SD		 2680{
2681 struct macsec_rx_sc_stats sum = {0, };
2682 int cpu;
2683
2684 for_each_possible_cpu(cpu) {
2685 const struct pcpu_rx_sc_stats *stats;
2686 struct macsec_rx_sc_stats tmp;
2687 unsigned int start;
2688
2689 stats = per_cpu_ptr(pstats, cpu);
2690 do {
2691 start = u64_stats_fetch_begin_irq(&stats->syncp);
2692 memcpy(&tmp, &stats->stats, sizeof(tmp));
2693 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2694
2695 sum.InOctetsValidated += tmp.InOctetsValidated;
2696 sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
2697 sum.InPktsUnchecked += tmp.InPktsUnchecked;
2698 sum.InPktsDelayed += tmp.InPktsDelayed;
2699 sum.InPktsOK += tmp.InPktsOK;
2700 sum.InPktsInvalid += tmp.InPktsInvalid;
2701 sum.InPktsLate += tmp.InPktsLate;
2702 sum.InPktsNotValid += tmp.InPktsNotValid;
2703 sum.InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2704 sum.InPktsUnusedSA += tmp.InPktsUnusedSA;
2705 }
2706
f60d94c0
ND		 2707 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2708 sum.InOctetsValidated,
2709 MACSEC_RXSC_STATS_ATTR_PAD) ||
2710 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2711 sum.InOctetsDecrypted,
2712 MACSEC_RXSC_STATS_ATTR_PAD) ||
2713 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2714 sum.InPktsUnchecked,
2715 MACSEC_RXSC_STATS_ATTR_PAD) ||
2716 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2717 sum.InPktsDelayed,
2718 MACSEC_RXSC_STATS_ATTR_PAD) ||
2719 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2720 sum.InPktsOK,
2721 MACSEC_RXSC_STATS_ATTR_PAD) ||
2722 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2723 sum.InPktsInvalid,
2724 MACSEC_RXSC_STATS_ATTR_PAD) ||
2725 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2726 sum.InPktsLate,
2727 MACSEC_RXSC_STATS_ATTR_PAD) ||
2728 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2729 sum.InPktsNotValid,
2730 MACSEC_RXSC_STATS_ATTR_PAD) ||
2731 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2732 sum.InPktsNotUsingSA,
2733 MACSEC_RXSC_STATS_ATTR_PAD) ||
2734 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2735 sum.InPktsUnusedSA,
2736 MACSEC_RXSC_STATS_ATTR_PAD))
c09440f7
SD		 2737 return -EMSGSIZE;
2738
2739 return 0;
2740}
2741
e1427237
FW		 2742static noinline_for_stack int
2743copy_tx_sc_stats(struct sk_buff *skb, struct pcpu_tx_sc_stats __percpu *pstats)
c09440f7
SD		 2744{
2745 struct macsec_tx_sc_stats sum = {0, };
2746 int cpu;
2747
2748 for_each_possible_cpu(cpu) {
2749 const struct pcpu_tx_sc_stats *stats;
2750 struct macsec_tx_sc_stats tmp;
2751 unsigned int start;
2752
2753 stats = per_cpu_ptr(pstats, cpu);
2754 do {
2755 start = u64_stats_fetch_begin_irq(&stats->syncp);
2756 memcpy(&tmp, &stats->stats, sizeof(tmp));
2757 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2758
2759 sum.OutPktsProtected += tmp.OutPktsProtected;
2760 sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
2761 sum.OutOctetsProtected += tmp.OutOctetsProtected;
2762 sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2763 }
2764
f60d94c0
ND		 2765 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2766 sum.OutPktsProtected,
2767 MACSEC_TXSC_STATS_ATTR_PAD) ||
2768 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2769 sum.OutPktsEncrypted,
2770 MACSEC_TXSC_STATS_ATTR_PAD) ||
2771 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2772 sum.OutOctetsProtected,
2773 MACSEC_TXSC_STATS_ATTR_PAD) ||
2774 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2775 sum.OutOctetsEncrypted,
2776 MACSEC_TXSC_STATS_ATTR_PAD))
c09440f7
SD		 2777 return -EMSGSIZE;
2778
2779 return 0;
2780}
2781
e1427237
FW		 2782static noinline_for_stack int
2783copy_secy_stats(struct sk_buff *skb, struct pcpu_secy_stats __percpu *pstats)
c09440f7
SD		 2784{
2785 struct macsec_dev_stats sum = {0, };
2786 int cpu;
2787
2788 for_each_possible_cpu(cpu) {
2789 const struct pcpu_secy_stats *stats;
2790 struct macsec_dev_stats tmp;
2791 unsigned int start;
2792
2793 stats = per_cpu_ptr(pstats, cpu);
2794 do {
2795 start = u64_stats_fetch_begin_irq(&stats->syncp);
2796 memcpy(&tmp, &stats->stats, sizeof(tmp));
2797 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2798
2799 sum.OutPktsUntagged += tmp.OutPktsUntagged;
2800 sum.InPktsUntagged += tmp.InPktsUntagged;
2801 sum.OutPktsTooLong += tmp.OutPktsTooLong;
2802 sum.InPktsNoTag += tmp.InPktsNoTag;
2803 sum.InPktsBadTag += tmp.InPktsBadTag;
2804 sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2805 sum.InPktsNoSCI += tmp.InPktsNoSCI;
2806 sum.InPktsOverrun += tmp.InPktsOverrun;
2807 }
2808
f60d94c0
ND		 2809 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2810 sum.OutPktsUntagged,
2811 MACSEC_SECY_STATS_ATTR_PAD) ||
2812 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2813 sum.InPktsUntagged,
2814 MACSEC_SECY_STATS_ATTR_PAD) ||
2815 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2816 sum.OutPktsTooLong,
2817 MACSEC_SECY_STATS_ATTR_PAD) ||
2818 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2819 sum.InPktsNoTag,
2820 MACSEC_SECY_STATS_ATTR_PAD) ||
2821 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2822 sum.InPktsBadTag,
2823 MACSEC_SECY_STATS_ATTR_PAD) ||
2824 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2825 sum.InPktsUnknownSCI,
2826 MACSEC_SECY_STATS_ATTR_PAD) ||
2827 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2828 sum.InPktsNoSCI,
2829 MACSEC_SECY_STATS_ATTR_PAD) ||
2830 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2831 sum.InPktsOverrun,
2832 MACSEC_SECY_STATS_ATTR_PAD))
c09440f7
SD		 2833 return -EMSGSIZE;
2834
2835 return 0;
2836}
2837
2838static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2839{
2840 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ae0be8de
MK		 2841 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2842 MACSEC_ATTR_SECY);
ccfdec90 2843 u64 csid;
c09440f7
SD		 2844
2845 if (!secy_nest)
2846 return 1;
2847
ccfdec90
FW		 2848 switch (secy->key_len) {
2849 case MACSEC_GCM_AES_128_SAK_LEN:
48ef50fa 2850 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 2851 break;
2852 case MACSEC_GCM_AES_256_SAK_LEN:
48ef50fa 2853 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
ccfdec90
FW		 2854 break;
2855 default:
2856 goto cancel;
2857 }
2858
f60d94c0
ND		 2859 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2860 MACSEC_SECY_ATTR_PAD) ||
2861 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
ccfdec90 2862 csid, MACSEC_SECY_ATTR_PAD) ||
c09440f7
SD		 2863 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2864 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2865 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2866 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2867 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2868 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2869 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2870 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2871 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
2872 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
2873 goto cancel;
2874
2875 if (secy->replay_protect) {
2876 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
2877 goto cancel;
2878 }
2879
2880 nla_nest_end(skb, secy_nest);
2881 return 0;
2882
2883cancel:
2884 nla_nest_cancel(skb, secy_nest);
2885 return 1;
2886}
2887
e1427237
FW		 2888static noinline_for_stack int
2889dump_secy(struct macsec_secy *secy, struct net_device *dev,
2890 struct sk_buff *skb, struct netlink_callback *cb)
c09440f7 2891{
dcb780fb 2892 struct macsec_dev *macsec = netdev_priv(dev);
c09440f7
SD		 2893 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2894 struct nlattr *txsa_list, *rxsc_list;
dcb780fb 2895 struct macsec_rx_sc *rx_sc;
c09440f7 2896 struct nlattr *attr;
dcb780fb
AT		 2897 void *hdr;
2898 int i, j;
c09440f7
SD		 2899
2900 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2901 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
2902 if (!hdr)
2903 return -EMSGSIZE;
2904
0a833c29 2905 genl_dump_check_consistent(cb, hdr);
c09440f7
SD		 2906
2907 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
2908 goto nla_put_failure;
2909
dcb780fb
AT		 2910 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
2911 if (!attr)
2912 goto nla_put_failure;
2913 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
2914 goto nla_put_failure;
2915 nla_nest_end(skb, attr);
2916
c09440f7
SD		 2917 if (nla_put_secy(secy, skb))
2918 goto nla_put_failure;
2919
ae0be8de 2920 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
c09440f7
SD		 2921 if (!attr)
2922 goto nla_put_failure;
2923 if (copy_tx_sc_stats(skb, tx_sc->stats)) {
2924 nla_nest_cancel(skb, attr);
2925 goto nla_put_failure;
2926 }
2927 nla_nest_end(skb, attr);
2928
ae0be8de 2929 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
c09440f7
SD		 2930 if (!attr)
2931 goto nla_put_failure;
2932 if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
2933 nla_nest_cancel(skb, attr);
2934 goto nla_put_failure;
2935 }
2936 nla_nest_end(skb, attr);
2937
ae0be8de 2938 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
c09440f7
SD		 2939 if (!txsa_list)
2940 goto nla_put_failure;
2941 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
2942 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
2943 struct nlattr *txsa_nest;
48ef50fa
EM		 2944 u64 pn;
2945 int pn_len;
c09440f7
SD		 2946
2947 if (!tx_sa)
2948 continue;
2949
ae0be8de 2950 txsa_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 2951 if (!txsa_nest) {
2952 nla_nest_cancel(skb, txsa_list);
2953 goto nla_put_failure;
2954 }
2955
48ef50fa
EM		 2956 if (secy->xpn) {
2957 pn = tx_sa->next_pn;
2958 pn_len = MACSEC_XPN_PN_LEN;
2959 } else {
2960 pn = tx_sa->next_pn_halves.lower;
2961 pn_len = MACSEC_DEFAULT_PN_LEN;
2962 }
2963
c09440f7 2964 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
48ef50fa 2965 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
8acca6ac 2966 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
48ef50fa 2967 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
c09440f7
SD		 2968 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
2969 nla_nest_cancel(skb, txsa_nest);
2970 nla_nest_cancel(skb, txsa_list);
2971 goto nla_put_failure;
2972 }
2973
ae0be8de 2974 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
c09440f7
SD		 2975 if (!attr) {
2976 nla_nest_cancel(skb, txsa_nest);
2977 nla_nest_cancel(skb, txsa_list);
2978 goto nla_put_failure;
2979 }
2980 if (copy_tx_sa_stats(skb, tx_sa->stats)) {
2981 nla_nest_cancel(skb, attr);
2982 nla_nest_cancel(skb, txsa_nest);
2983 nla_nest_cancel(skb, txsa_list);
2984 goto nla_put_failure;
2985 }
2986 nla_nest_end(skb, attr);
2987
2988 nla_nest_end(skb, txsa_nest);
2989 }
2990 nla_nest_end(skb, txsa_list);
2991
ae0be8de 2992 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
c09440f7
SD		 2993 if (!rxsc_list)
2994 goto nla_put_failure;
2995
2996 j = 1;
2997 for_each_rxsc_rtnl(secy, rx_sc) {
2998 int k;
2999 struct nlattr *rxsa_list;
ae0be8de 3000 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
c09440f7
SD		 3001
3002 if (!rxsc_nest) {
3003 nla_nest_cancel(skb, rxsc_list);
3004 goto nla_put_failure;
3005 }
3006
3007 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
f60d94c0
ND		 3008 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3009 MACSEC_RXSC_ATTR_PAD)) {
c09440f7
SD		 3010 nla_nest_cancel(skb, rxsc_nest);
3011 nla_nest_cancel(skb, rxsc_list);
3012 goto nla_put_failure;
3013 }
3014
ae0be8de 3015 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
c09440f7
SD		 3016 if (!attr) {
3017 nla_nest_cancel(skb, rxsc_nest);
3018 nla_nest_cancel(skb, rxsc_list);
3019 goto nla_put_failure;
3020 }
3021 if (copy_rx_sc_stats(skb, rx_sc->stats)) {
3022 nla_nest_cancel(skb, attr);
3023 nla_nest_cancel(skb, rxsc_nest);
3024 nla_nest_cancel(skb, rxsc_list);
3025 goto nla_put_failure;
3026 }
3027 nla_nest_end(skb, attr);
3028
ae0be8de
MK		 3029 rxsa_list = nla_nest_start_noflag(skb,
3030 MACSEC_RXSC_ATTR_SA_LIST);
c09440f7
SD		 3031 if (!rxsa_list) {
3032 nla_nest_cancel(skb, rxsc_nest);
3033 nla_nest_cancel(skb, rxsc_list);
3034 goto nla_put_failure;
3035 }
3036
3037 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3038 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3039 struct nlattr *rxsa_nest;
48ef50fa
EM		 3040 u64 pn;
3041 int pn_len;
c09440f7
SD		 3042
3043 if (!rx_sa)
3044 continue;
3045
ae0be8de 3046 rxsa_nest = nla_nest_start_noflag(skb, k++);
c09440f7
SD		 3047 if (!rxsa_nest) {
3048 nla_nest_cancel(skb, rxsa_list);
3049 nla_nest_cancel(skb, rxsc_nest);
3050 nla_nest_cancel(skb, rxsc_list);
3051 goto nla_put_failure;
3052 }
3053
ae0be8de
MK		 3054 attr = nla_nest_start_noflag(skb,
3055 MACSEC_SA_ATTR_STATS);
c09440f7
SD		 3056 if (!attr) {
3057 nla_nest_cancel(skb, rxsa_list);
3058 nla_nest_cancel(skb, rxsc_nest);
3059 nla_nest_cancel(skb, rxsc_list);
3060 goto nla_put_failure;
3061 }
3062 if (copy_rx_sa_stats(skb, rx_sa->stats)) {
3063 nla_nest_cancel(skb, attr);
3064 nla_nest_cancel(skb, rxsa_list);
3065 nla_nest_cancel(skb, rxsc_nest);
3066 nla_nest_cancel(skb, rxsc_list);
3067 goto nla_put_failure;
3068 }
3069 nla_nest_end(skb, attr);
3070
48ef50fa
EM		 3071 if (secy->xpn) {
3072 pn = rx_sa->next_pn;
3073 pn_len = MACSEC_XPN_PN_LEN;
3074 } else {
3075 pn = rx_sa->next_pn_halves.lower;
3076 pn_len = MACSEC_DEFAULT_PN_LEN;
3077 }
3078
c09440f7 3079 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
48ef50fa 3080 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
8acca6ac 3081 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
48ef50fa 3082 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
c09440f7
SD		 3083 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3084 nla_nest_cancel(skb, rxsa_nest);
3085 nla_nest_cancel(skb, rxsc_nest);
3086 nla_nest_cancel(skb, rxsc_list);
3087 goto nla_put_failure;
3088 }
3089 nla_nest_end(skb, rxsa_nest);
3090 }
3091
3092 nla_nest_end(skb, rxsa_list);
3093 nla_nest_end(skb, rxsc_nest);
3094 }
3095
3096 nla_nest_end(skb, rxsc_list);
3097
c09440f7
SD		 3098 genlmsg_end(skb, hdr);
3099
3100 return 0;
3101
3102nla_put_failure:
c09440f7
SD		 3103 genlmsg_cancel(skb, hdr);
3104 return -EMSGSIZE;
3105}
3106
96cfc505
SD		 3107static int macsec_generation = 1; /* protected by RTNL */
3108
c09440f7
SD		 3109static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3110{
3111 struct net *net = sock_net(skb->sk);
3112 struct net_device *dev;
3113 int dev_idx, d;
3114
3115 dev_idx = cb->args[0];
3116
3117 d = 0;
c10c63ea 3118 rtnl_lock();
96cfc505
SD		 3119
3120 cb->seq = macsec_generation;
3121
c09440f7
SD		 3122 for_each_netdev(net, dev) {
3123 struct macsec_secy *secy;
3124
3125 if (d < dev_idx)
3126 goto next;
3127
3128 if (!netif_is_macsec(dev))
3129 goto next;
3130
3131 secy = &macsec_priv(dev)->secy;
3132 if (dump_secy(secy, dev, skb, cb) < 0)
3133 goto done;
3134next:
3135 d++;
3136 }
3137
3138done:
c10c63ea 3139 rtnl_unlock();
c09440f7
SD		 3140 cb->args[0] = d;
3141 return skb->len;
3142}
3143
3144static const struct genl_ops macsec_genl_ops[] = {
3145 {
3146 .cmd = MACSEC_CMD_GET_TXSC,
ef6243ac 3147 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3148 .dumpit = macsec_dump_txsc,
c09440f7
SD		 3149 },
3150 {
3151 .cmd = MACSEC_CMD_ADD_RXSC,
ef6243ac 3152 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3153 .doit = macsec_add_rxsc,
c09440f7
SD		 3154 .flags = GENL_ADMIN_PERM,
3155 },
3156 {
3157 .cmd = MACSEC_CMD_DEL_RXSC,
ef6243ac 3158 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3159 .doit = macsec_del_rxsc,
c09440f7
SD		 3160 .flags = GENL_ADMIN_PERM,
3161 },
3162 {
3163 .cmd = MACSEC_CMD_UPD_RXSC,
ef6243ac 3164 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3165 .doit = macsec_upd_rxsc,
c09440f7
SD		 3166 .flags = GENL_ADMIN_PERM,
3167 },
3168 {
3169 .cmd = MACSEC_CMD_ADD_TXSA,
ef6243ac 3170 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3171 .doit = macsec_add_txsa,
c09440f7
SD		 3172 .flags = GENL_ADMIN_PERM,
3173 },
3174 {
3175 .cmd = MACSEC_CMD_DEL_TXSA,
ef6243ac 3176 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3177 .doit = macsec_del_txsa,
c09440f7
SD		 3178 .flags = GENL_ADMIN_PERM,
3179 },
3180 {
3181 .cmd = MACSEC_CMD_UPD_TXSA,
ef6243ac 3182 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3183 .doit = macsec_upd_txsa,
c09440f7
SD		 3184 .flags = GENL_ADMIN_PERM,
3185 },
3186 {
3187 .cmd = MACSEC_CMD_ADD_RXSA,
ef6243ac 3188 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3189 .doit = macsec_add_rxsa,
c09440f7
SD		 3190 .flags = GENL_ADMIN_PERM,
3191 },
3192 {
3193 .cmd = MACSEC_CMD_DEL_RXSA,
ef6243ac 3194 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3195 .doit = macsec_del_rxsa,
c09440f7
SD		 3196 .flags = GENL_ADMIN_PERM,
3197 },
3198 {
3199 .cmd = MACSEC_CMD_UPD_RXSA,
ef6243ac 3200 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
c09440f7 3201 .doit = macsec_upd_rxsa,
c09440f7
SD		 3202 .flags = GENL_ADMIN_PERM,
3203 },
dcb780fb
AT		 3204 {
3205 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3206 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3207 .doit = macsec_upd_offload,
3208 .flags = GENL_ADMIN_PERM,
3209 },
c09440f7
SD		 3210};
3211
56989f6d 3212static struct genl_family macsec_fam __ro_after_init = {
489111e5
JB		 3213 .name = MACSEC_GENL_NAME,
3214 .hdrsize = 0,
3215 .version = MACSEC_GENL_VERSION,
3216 .maxattr = MACSEC_ATTR_MAX,
3b0f31f2 3217 .policy = macsec_genl_policy,
489111e5
JB		 3218 .netnsok = true,
3219 .module = THIS_MODULE,
3220 .ops = macsec_genl_ops,
3221 .n_ops = ARRAY_SIZE(macsec_genl_ops),
3222};
3223
c09440f7
SD		 3224static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3225 struct net_device *dev)
3226{
3227 struct macsec_dev *macsec = netdev_priv(dev);
3228 struct macsec_secy *secy = &macsec->secy;
3229 struct pcpu_secy_stats *secy_stats;
3230 int ret, len;
3231
3cf3227a
AT		 3232 if (macsec_is_offloaded(netdev_priv(dev))) {
3233 skb->dev = macsec->real_dev;
3234 return dev_queue_xmit(skb);
3235 }
3236
c09440f7
SD		 3237 /* 10.5 */
3238 if (!secy->protect_frames) {
3239 secy_stats = this_cpu_ptr(macsec->stats);
3240 u64_stats_update_begin(&secy_stats->syncp);
3241 secy_stats->stats.OutPktsUntagged++;
3242 u64_stats_update_end(&secy_stats->syncp);
79c62220 3243 skb->dev = macsec->real_dev;
c09440f7
SD		 3244 len = skb->len;
3245 ret = dev_queue_xmit(skb);
3246 count_tx(dev, ret, len);
3247 return ret;
3248 }
3249
3250 if (!secy->operational) {
3251 kfree_skb(skb);
3252 dev->stats.tx_dropped++;
3253 return NETDEV_TX_OK;
3254 }
3255
3256 skb = macsec_encrypt(skb, dev);
3257 if (IS_ERR(skb)) {
3258 if (PTR_ERR(skb) != -EINPROGRESS)
3259 dev->stats.tx_dropped++;
3260 return NETDEV_TX_OK;
3261 }
3262
3263 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3264
3265 macsec_encrypt_finish(skb, dev);
3266 len = skb->len;
3267 ret = dev_queue_xmit(skb);
3268 count_tx(dev, ret, len);
3269 return ret;
3270}
3271
3272#define MACSEC_FEATURES \
3273 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
e2003872 3274
c09440f7
SD		 3275static int macsec_dev_init(struct net_device *dev)
3276{
3277 struct macsec_dev *macsec = macsec_priv(dev);
3278 struct net_device *real_dev = macsec->real_dev;
5491e7c6 3279 int err;
c09440f7
SD		 3280
3281 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3282 if (!dev->tstats)
3283 return -ENOMEM;
3284
5491e7c6
PA		 3285 err = gro_cells_init(&macsec->gro_cells, dev);
3286 if (err) {
3287 free_percpu(dev->tstats);
3288 return err;
3289 }
3290
c09440f7
SD		 3291 dev->features = real_dev->features & MACSEC_FEATURES;
3292 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3293
3294 dev->needed_headroom = real_dev->needed_headroom +
3295 MACSEC_NEEDED_HEADROOM;
3296 dev->needed_tailroom = real_dev->needed_tailroom +
3297 MACSEC_NEEDED_TAILROOM;
3298
3299 if (is_zero_ether_addr(dev->dev_addr))
3300 eth_hw_addr_inherit(dev, real_dev);
3301 if (is_zero_ether_addr(dev->broadcast))
3302 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3303
3304 return 0;
3305}
3306
3307static void macsec_dev_uninit(struct net_device *dev)
3308{
5491e7c6
PA		 3309 struct macsec_dev *macsec = macsec_priv(dev);
3310
3311 gro_cells_destroy(&macsec->gro_cells);
c09440f7
SD		 3312 free_percpu(dev->tstats);
3313}
3314
3315static netdev_features_t macsec_fix_features(struct net_device *dev,
3316 netdev_features_t features)
3317{
3318 struct macsec_dev *macsec = macsec_priv(dev);
3319 struct net_device *real_dev = macsec->real_dev;
3320
5491e7c6
PA		 3321 features &= (real_dev->features & MACSEC_FEATURES) |
3322 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3323 features |= NETIF_F_LLTX;
c09440f7
SD		 3324
3325 return features;
3326}
3327
3328static int macsec_dev_open(struct net_device *dev)
3329{
3330 struct macsec_dev *macsec = macsec_priv(dev);
3331 struct net_device *real_dev = macsec->real_dev;
3332 int err;
3333
c09440f7
SD		 3334 err = dev_uc_add(real_dev, dev->dev_addr);
3335 if (err < 0)
3336 return err;
3337
3338 if (dev->flags & IFF_ALLMULTI) {
3339 err = dev_set_allmulti(real_dev, 1);
3340 if (err < 0)
3341 goto del_unicast;
3342 }
3343
3344 if (dev->flags & IFF_PROMISC) {
3345 err = dev_set_promiscuity(real_dev, 1);
3346 if (err < 0)
3347 goto clear_allmulti;
3348 }
3349
3cf3227a
AT		 3350 /* If h/w offloading is available, propagate to the device */
3351 if (macsec_is_offloaded(macsec)) {
3352 const struct macsec_ops *ops;
3353 struct macsec_context ctx;
3354
3355 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3356 if (!ops) {
3357 err = -EOPNOTSUPP;
3358 goto clear_allmulti;
3359 }
3360
182879f8 3361 ctx.secy = &macsec->secy;
3cf3227a
AT		 3362 err = macsec_offload(ops->mdo_dev_open, &ctx);
3363 if (err)
3364 goto clear_allmulti;
3365 }
3366
c09440f7
SD		 3367 if (netif_carrier_ok(real_dev))
3368 netif_carrier_on(dev);
3369
3370 return 0;
3371clear_allmulti:
3372 if (dev->flags & IFF_ALLMULTI)
3373 dev_set_allmulti(real_dev, -1);
3374del_unicast:
3375 dev_uc_del(real_dev, dev->dev_addr);
3376 netif_carrier_off(dev);
3377 return err;
3378}
3379
3380static int macsec_dev_stop(struct net_device *dev)
3381{
3382 struct macsec_dev *macsec = macsec_priv(dev);
3383 struct net_device *real_dev = macsec->real_dev;
3384
3385 netif_carrier_off(dev);
3386
3cf3227a
AT		 3387 /* If h/w offloading is available, propagate to the device */
3388 if (macsec_is_offloaded(macsec)) {
3389 const struct macsec_ops *ops;
3390 struct macsec_context ctx;
3391
3392 ops = macsec_get_ops(macsec, &ctx);
182879f8
DB		 3393 if (ops) {
3394 ctx.secy = &macsec->secy;
3cf3227a 3395 macsec_offload(ops->mdo_dev_stop, &ctx);
182879f8 3396 }
3cf3227a
AT		 3397 }
3398
c09440f7
SD		 3399 dev_mc_unsync(real_dev, dev);
3400 dev_uc_unsync(real_dev, dev);
3401
3402 if (dev->flags & IFF_ALLMULTI)
3403 dev_set_allmulti(real_dev, -1);
3404
3405 if (dev->flags & IFF_PROMISC)
3406 dev_set_promiscuity(real_dev, -1);
3407
3408 dev_uc_del(real_dev, dev->dev_addr);
3409
3410 return 0;
3411}
3412
3413static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3414{
3415 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3416
3417 if (!(dev->flags & IFF_UP))
3418 return;
3419
3420 if (change & IFF_ALLMULTI)
3421 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3422
3423 if (change & IFF_PROMISC)
3424 dev_set_promiscuity(real_dev,
3425 dev->flags & IFF_PROMISC ? 1 : -1);
3426}
3427
3428static void macsec_dev_set_rx_mode(struct net_device *dev)
3429{
3430 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3431
3432 dev_mc_sync(real_dev, dev);
3433 dev_uc_sync(real_dev, dev);
3434}
3435
3436static int macsec_set_mac_address(struct net_device *dev, void *p)
3437{
3438 struct macsec_dev *macsec = macsec_priv(dev);
3439 struct net_device *real_dev = macsec->real_dev;
3440 struct sockaddr *addr = p;
3441 int err;
3442
3443 if (!is_valid_ether_addr(addr->sa_data))
3444 return -EADDRNOTAVAIL;
3445
3446 if (!(dev->flags & IFF_UP))
3447 goto out;
3448
3449 err = dev_uc_add(real_dev, addr->sa_data);
3450 if (err < 0)
3451 return err;
3452
3453 dev_uc_del(real_dev, dev->dev_addr);
3454
3455out:
3456 ether_addr_copy(dev->dev_addr, addr->sa_data);
6fc498bc 3457 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
09f4136c
DB		 3458
3459 /* If h/w offloading is available, propagate to the device */
3460 if (macsec_is_offloaded(macsec)) {
3461 const struct macsec_ops *ops;
3462 struct macsec_context ctx;
3463
3464 ops = macsec_get_ops(macsec, &ctx);
3465 if (ops) {
3466 ctx.secy = &macsec->secy;
3467 macsec_offload(ops->mdo_upd_secy, &ctx);
3468 }
3469 }
3470
c09440f7
SD		 3471 return 0;
3472}
3473
3474static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3475{
3476 struct macsec_dev *macsec = macsec_priv(dev);
3477 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3478
3479 if (macsec->real_dev->mtu - extra < new_mtu)
3480 return -ERANGE;
3481
3482 dev->mtu = new_mtu;
3483
3484 return 0;
3485}
3486
bc1f4470 3487static void macsec_get_stats64(struct net_device *dev,
3488 struct rtnl_link_stats64 *s)
c09440f7
SD		 3489{
3490 int cpu;
3491
3492 if (!dev->tstats)
bc1f4470 3493 return;
c09440f7
SD		 3494
3495 for_each_possible_cpu(cpu) {
3496 struct pcpu_sw_netstats *stats;
3497 struct pcpu_sw_netstats tmp;
3498 int start;
3499
3500 stats = per_cpu_ptr(dev->tstats, cpu);
3501 do {
3502 start = u64_stats_fetch_begin_irq(&stats->syncp);
3503 tmp.rx_packets = stats->rx_packets;
3504 tmp.rx_bytes = stats->rx_bytes;
3505 tmp.tx_packets = stats->tx_packets;
3506 tmp.tx_bytes = stats->tx_bytes;
3507 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
3508
3509 s->rx_packets += tmp.rx_packets;
3510 s->rx_bytes += tmp.rx_bytes;
3511 s->tx_packets += tmp.tx_packets;
3512 s->tx_bytes += tmp.tx_bytes;
3513 }
3514
3515 s->rx_dropped = dev->stats.rx_dropped;
3516 s->tx_dropped = dev->stats.tx_dropped;
c09440f7
SD		 3517}
3518
3519static int macsec_get_iflink(const struct net_device *dev)
3520{
3521 return macsec_priv(dev)->real_dev->ifindex;
3522}
3523
3524static const struct net_device_ops macsec_netdev_ops = {
3525 .ndo_init = macsec_dev_init,
3526 .ndo_uninit = macsec_dev_uninit,
3527 .ndo_open = macsec_dev_open,
3528 .ndo_stop = macsec_dev_stop,
3529 .ndo_fix_features = macsec_fix_features,
3530 .ndo_change_mtu = macsec_change_mtu,
3531 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3532 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3533 .ndo_set_mac_address = macsec_set_mac_address,
3534 .ndo_start_xmit = macsec_start_xmit,
3535 .ndo_get_stats64 = macsec_get_stats64,
3536 .ndo_get_iflink = macsec_get_iflink,
3537};
3538
3539static const struct device_type macsec_type = {
3540 .name = "macsec",
3541};
3542
3543static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3544 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
31d9a1c5 3545 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
c09440f7
SD		 3546 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3547 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3548 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3549 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3550 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3551 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3552 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3553 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3554 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3555 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3556 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3557};
3558
3559static void macsec_free_netdev(struct net_device *dev)
3560{
3561 struct macsec_dev *macsec = macsec_priv(dev);
c09440f7
SD		 3562
3563 free_percpu(macsec->stats);
3564 free_percpu(macsec->secy.tx_sc.stats);
3565
c09440f7
SD		 3566}
3567
3568static void macsec_setup(struct net_device *dev)
3569{
3570 ether_setup(dev);
91572088
JW		 3571 dev->min_mtu = 0;
3572 dev->max_mtu = ETH_MAX_MTU;
e425974f 3573 dev->priv_flags |= IFF_NO_QUEUE;
c09440f7 3574 dev->netdev_ops = &macsec_netdev_ops;
cf124db5
DM		 3575 dev->needs_free_netdev = true;
3576 dev->priv_destructor = macsec_free_netdev;
c24acf03 3577 SET_NETDEV_DEVTYPE(dev, &macsec_type);
c09440f7
SD		 3578
3579 eth_zero_addr(dev->broadcast);
3580}
3581
ccfdec90
FW		 3582static int macsec_changelink_common(struct net_device *dev,
3583 struct nlattr *data[])
c09440f7
SD		 3584{
3585 struct macsec_secy *secy;
3586 struct macsec_tx_sc *tx_sc;
3587
3588 secy = &macsec_priv(dev)->secy;
3589 tx_sc = &secy->tx_sc;
3590
3591 if (data[IFLA_MACSEC_ENCODING_SA]) {
3592 struct macsec_tx_sa *tx_sa;
3593
3594 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3595 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3596
3597 secy->operational = tx_sa && tx_sa->active;
3598 }
3599
3600 if (data[IFLA_MACSEC_WINDOW])
3601 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3602
3603 if (data[IFLA_MACSEC_ENCRYPT])
3604 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3605
3606 if (data[IFLA_MACSEC_PROTECT])
3607 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3608
3609 if (data[IFLA_MACSEC_INC_SCI])
3610 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3611
3612 if (data[IFLA_MACSEC_ES])
3613 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3614
3615 if (data[IFLA_MACSEC_SCB])
3616 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3617
3618 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3619 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3620
3621 if (data[IFLA_MACSEC_VALIDATION])
3622 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
ccfdec90
FW		 3623
3624 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3625 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3626 case MACSEC_CIPHER_ID_GCM_AES_128:
e8660ded 3627 case MACSEC_DEFAULT_CIPHER_ID:
ccfdec90 3628 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
48ef50fa 3629 secy->xpn = false;
ccfdec90
FW		 3630 break;
3631 case MACSEC_CIPHER_ID_GCM_AES_256:
3632 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
48ef50fa
EM		 3633 secy->xpn = false;
3634 break;
3635 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3636 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3637 secy->xpn = true;
3638 break;
3639 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3640 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3641 secy->xpn = true;
ccfdec90
FW		 3642 break;
3643 default:
3644 return -EINVAL;
3645 }
3646 }
3647
3648 return 0;
c09440f7
SD		 3649}
3650
3651static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
ad744b22
MS		 3652 struct nlattr *data[],
3653 struct netlink_ext_ack *extack)
c09440f7 3654{
3cf3227a
AT		 3655 struct macsec_dev *macsec = macsec_priv(dev);
3656 struct macsec_tx_sa tx_sc;
3657 struct macsec_secy secy;
3658 int ret;
3659
c09440f7
SD		 3660 if (!data)
3661 return 0;
3662
3663 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3664 data[IFLA_MACSEC_ICV_LEN] ||
3665 data[IFLA_MACSEC_SCI] ||
3666 data[IFLA_MACSEC_PORT])
3667 return -EINVAL;
3668
3cf3227a
AT		 3669 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3670 * propagation fails, to revert macsec_changelink_common.
3671 */
3672 memcpy(&secy, &macsec->secy, sizeof(secy));
3673 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3674
3675 ret = macsec_changelink_common(dev, data);
3676 if (ret)
3677 return ret;
3678
3679 /* If h/w offloading is available, propagate to the device */
3680 if (macsec_is_offloaded(macsec)) {
3681 const struct macsec_ops *ops;
3682 struct macsec_context ctx;
3683 int ret;
3684
3685 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3686 if (!ops) {
3687 ret = -EOPNOTSUPP;
3688 goto cleanup;
3689 }
3690
3691 ctx.secy = &macsec->secy;
3692 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3693 if (ret)
3694 goto cleanup;
3695 }
3696
3697 return 0;
3698
3699cleanup:
3700 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3701 memcpy(&macsec->secy, &secy, sizeof(secy));
3702
3703 return ret;
c09440f7
SD		 3704}
3705
3706static void macsec_del_dev(struct macsec_dev *macsec)
3707{
3708 int i;
3709
3710 while (macsec->secy.rx_sc) {
3711 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3712
3713 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3714 free_rx_sc(rx_sc);
3715 }
3716
3717 for (i = 0; i < MACSEC_NUM_AN; i++) {
3718 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3719
3720 if (sa) {
3721 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3722 clear_tx_sa(sa);
3723 }
3724 }
3725}
3726
bbe11fab
SD		 3727static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3728{
3729 struct macsec_dev *macsec = macsec_priv(dev);
e2003872 3730 struct net_device *real_dev = macsec->real_dev;
bbe11fab
SD		 3731
3732 unregister_netdevice_queue(dev, head);
3733 list_del_rcu(&macsec->secys);
3734 macsec_del_dev(macsec);
e2003872 3735 netdev_upper_dev_unlink(real_dev, dev);
bbe11fab
SD		 3736
3737 macsec_generation++;
3738}
3739
c09440f7
SD		 3740static void macsec_dellink(struct net_device *dev, struct list_head *head)
3741{
3742 struct macsec_dev *macsec = macsec_priv(dev);
3743 struct net_device *real_dev = macsec->real_dev;
3744 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3745
3cf3227a
AT		 3746 /* If h/w offloading is available, propagate to the device */
3747 if (macsec_is_offloaded(macsec)) {
3748 const struct macsec_ops *ops;
3749 struct macsec_context ctx;
3750
3751 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3752 if (ops) {
3753 ctx.secy = &macsec->secy;
3754 macsec_offload(ops->mdo_del_secy, &ctx);
3755 }
3756 }
3757
bbe11fab 3758 macsec_common_dellink(dev, head);
96cfc505 3759
960d5848 3760 if (list_empty(&rxd->secys)) {
c09440f7 3761 netdev_rx_handler_unregister(real_dev);
960d5848
SD		 3762 kfree(rxd);
3763 }
c09440f7
SD		 3764}
3765
3766static int register_macsec_dev(struct net_device *real_dev,
3767 struct net_device *dev)
3768{
3769 struct macsec_dev *macsec = macsec_priv(dev);
3770 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3771
3772 if (!rxd) {
3773 int err;
3774
3775 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3776 if (!rxd)
3777 return -ENOMEM;
3778
3779 INIT_LIST_HEAD(&rxd->secys);
3780
3781 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3782 rxd);
960d5848
SD		 3783 if (err < 0) {
3784 kfree(rxd);
c09440f7 3785 return err;
960d5848 3786 }
c09440f7
SD		 3787 }
3788
3789 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3790 return 0;
3791}
3792
3793static bool sci_exists(struct net_device *dev, sci_t sci)
3794{
3795 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3796 struct macsec_dev *macsec;
3797
3798 list_for_each_entry(macsec, &rxd->secys, secys) {
3799 if (macsec->secy.sci == sci)
3800 return true;
3801 }
3802
3803 return false;
3804}
3805
c09440f7
SD		 3806static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3807{
3808 struct macsec_dev *macsec = macsec_priv(dev);
3809 struct macsec_secy *secy = &macsec->secy;
3810
3811 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3812 if (!macsec->stats)
3813 return -ENOMEM;
3814
3815 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3816 if (!secy->tx_sc.stats) {
3817 free_percpu(macsec->stats);
3818 return -ENOMEM;
3819 }
3820
3821 if (sci == MACSEC_UNDEF_SCI)
3822 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3823
3824 secy->netdev = dev;
3825 secy->operational = true;
3826 secy->key_len = DEFAULT_SAK_LEN;
3827 secy->icv_len = icv_len;
3828 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3829 secy->protect_frames = true;
3830 secy->replay_protect = false;
48ef50fa 3831 secy->xpn = DEFAULT_XPN;
c09440f7
SD		 3832
3833 secy->sci = sci;
3834 secy->tx_sc.active = true;
3835 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3836 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3837 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3838 secy->tx_sc.end_station = false;
3839 secy->tx_sc.scb = false;
3840
3841 return 0;
3842}
3843
3844static int macsec_newlink(struct net *net, struct net_device *dev,
7a3f4a18
MS		 3845 struct nlattr *tb[], struct nlattr *data[],
3846 struct netlink_ext_ack *extack)
c09440f7
SD		 3847{
3848 struct macsec_dev *macsec = macsec_priv(dev);
3849 struct net_device *real_dev;
3850 int err;
3851 sci_t sci;
3852 u8 icv_len = DEFAULT_ICV_LEN;
3853 rx_handler_func_t *rx_handler;
3854
3855 if (!tb[IFLA_LINK])
3856 return -EINVAL;
3857 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
3858 if (!real_dev)
3859 return -ENODEV;
b06d072c
WB		 3860 if (real_dev->type != ARPHRD_ETHER)
3861 return -EINVAL;
c09440f7
SD		 3862
3863 dev->priv_flags |= IFF_MACSEC;
3864
3865 macsec->real_dev = real_dev;
3866
3cf3227a
AT		 3867 /* MACsec offloading is off by default */
3868 macsec->offload = MACSEC_OFFLOAD_OFF;
3869
c09440f7
SD		 3870 if (data && data[IFLA_MACSEC_ICV_LEN])
3871 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
3872 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
3873
3874 rx_handler = rtnl_dereference(real_dev->rx_handler);
3875 if (rx_handler && rx_handler != macsec_handle_frame)
3876 return -EBUSY;
3877
3878 err = register_netdevice(dev);
3879 if (err < 0)
3880 return err;
3881
42ab19ee 3882 err = netdev_upper_dev_link(real_dev, dev, extack);
e2003872 3883 if (err < 0)
bd28899d 3884 goto unregister;
e2003872 3885
c09440f7
SD		 3886 /* need to be already registered so that ->init has run and
3887 * the MAC addr is set
3888 */
3889 if (data && data[IFLA_MACSEC_SCI])
3890 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
3891 else if (data && data[IFLA_MACSEC_PORT])
3892 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
3893 else
3894 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3895
3896 if (rx_handler && sci_exists(real_dev, sci)) {
3897 err = -EBUSY;
e2003872 3898 goto unlink;
c09440f7
SD		 3899 }
3900
3901 err = macsec_add_dev(dev, sci, icv_len);
3902 if (err)
e2003872 3903 goto unlink;
c09440f7 3904
ccfdec90
FW		 3905 if (data) {
3906 err = macsec_changelink_common(dev, data);
3907 if (err)
3908 goto del_dev;
3909 }
c09440f7
SD		 3910
3911 err = register_macsec_dev(real_dev, dev);
3912 if (err < 0)
3913 goto del_dev;
3914
e6ac0758
SD		 3915 netif_stacked_transfer_operstate(real_dev, dev);
3916 linkwatch_fire_event(dev);
3917
96cfc505
SD		 3918 macsec_generation++;
3919
c09440f7
SD		 3920 return 0;
3921
3922del_dev:
3923 macsec_del_dev(macsec);
e2003872
SD		 3924unlink:
3925 netdev_upper_dev_unlink(real_dev, dev);
bd28899d 3926unregister:
c09440f7
SD		 3927 unregister_netdevice(dev);
3928 return err;
3929}
3930
a8b8a889
MS		 3931static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
3932 struct netlink_ext_ack *extack)
c09440f7 3933{
74816480 3934 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
c09440f7
SD		 3935 u8 icv_len = DEFAULT_ICV_LEN;
3936 int flag;
3937 bool es, scb, sci;
3938
3939 if (!data)
3940 return 0;
3941
3942 if (data[IFLA_MACSEC_CIPHER_SUITE])
3943 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
3944
f04c392d 3945 if (data[IFLA_MACSEC_ICV_LEN]) {
c09440f7 3946 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
f04c392d
DC		 3947 if (icv_len != DEFAULT_ICV_LEN) {
3948 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
3949 struct crypto_aead *dummy_tfm;
3950
3951 dummy_tfm = macsec_alloc_tfm(dummy_key,
3952 DEFAULT_SAK_LEN,
3953 icv_len);
3954 if (IS_ERR(dummy_tfm))
3955 return PTR_ERR(dummy_tfm);
3956 crypto_free_aead(dummy_tfm);
3957 }
3958 }
c09440f7
SD		 3959
3960 switch (csid) {
ccfdec90
FW		 3961 case MACSEC_CIPHER_ID_GCM_AES_128:
3962 case MACSEC_CIPHER_ID_GCM_AES_256:
48ef50fa
EM		 3963 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3964 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
e8660ded 3965 case MACSEC_DEFAULT_CIPHER_ID:
c09440f7 3966 if (icv_len < MACSEC_MIN_ICV_LEN ||
2ccbe2cb 3967 icv_len > MACSEC_STD_ICV_LEN)
c09440f7
SD		 3968 return -EINVAL;
3969 break;
3970 default:
3971 return -EINVAL;
3972 }
3973
3974 if (data[IFLA_MACSEC_ENCODING_SA]) {
3975 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
3976 return -EINVAL;
3977 }
3978
3979 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
3980 flag < IFLA_MACSEC_VALIDATION;
3981 flag++) {
3982 if (data[flag]) {
3983 if (nla_get_u8(data[flag]) > 1)
3984 return -EINVAL;
3985 }
3986 }
3987
3988 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
3989 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
3990 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
3991
3992 if ((sci && (scb || es)) || (scb && es))
3993 return -EINVAL;
3994
3995 if (data[IFLA_MACSEC_VALIDATION] &&
3996 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
3997 return -EINVAL;
3998
4b1fb935
SD		 3999 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4000 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
c09440f7
SD		 4001 !data[IFLA_MACSEC_WINDOW])
4002 return -EINVAL;
4003
4004 return 0;
4005}
4006
4007static struct net *macsec_get_link_net(const struct net_device *dev)
4008{
4009 return dev_net(macsec_priv(dev)->real_dev);
4010}
4011
4012static size_t macsec_get_size(const struct net_device *dev)
4013{
c9fba3ed
ZS		 4014 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4015 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4016 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4017 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4018 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4019 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4020 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4021 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4022 nla_total_size(1) + /* IFLA_MACSEC_ES */
4023 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4024 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4025 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
c09440f7
SD		 4026 0;
4027}
4028
4029static int macsec_fill_info(struct sk_buff *skb,
4030 const struct net_device *dev)
4031{
4032 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4033 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
ccfdec90
FW		 4034 u64 csid;
4035
4036 switch (secy->key_len) {
4037 case MACSEC_GCM_AES_128_SAK_LEN:
48ef50fa 4038 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
ccfdec90
FW		 4039 break;
4040 case MACSEC_GCM_AES_256_SAK_LEN:
48ef50fa 4041 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
ccfdec90
FW		 4042 break;
4043 default:
4044 goto nla_put_failure;
4045 }
c09440f7 4046
f60d94c0
ND		 4047 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4048 IFLA_MACSEC_PAD) ||
c09440f7 4049 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
f60d94c0 4050 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
ccfdec90 4051 csid, IFLA_MACSEC_PAD) ||
c09440f7
SD		 4052 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4053 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4054 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4055 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4056 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4057 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4058 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4059 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4060 0)
4061 goto nla_put_failure;
4062
4063 if (secy->replay_protect) {
4064 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4065 goto nla_put_failure;
4066 }
4067
4068 return 0;
4069
4070nla_put_failure:
4071 return -EMSGSIZE;
4072}
4073
4074static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4075 .kind = "macsec",
4076 .priv_size = sizeof(struct macsec_dev),
4077 .maxtype = IFLA_MACSEC_MAX,
4078 .policy = macsec_rtnl_policy,
4079 .setup = macsec_setup,
4080 .validate = macsec_validate_attr,
4081 .newlink = macsec_newlink,
4082 .changelink = macsec_changelink,
4083 .dellink = macsec_dellink,
4084 .get_size = macsec_get_size,
4085 .fill_info = macsec_fill_info,
4086 .get_link_net = macsec_get_link_net,
4087};
4088
4089static bool is_macsec_master(struct net_device *dev)
4090{
4091 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4092}
4093
4094static int macsec_notify(struct notifier_block *this, unsigned long event,
4095 void *ptr)
4096{
4097 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4098 LIST_HEAD(head);
4099
4100 if (!is_macsec_master(real_dev))
4101 return NOTIFY_DONE;
4102
4103 switch (event) {
e6ac0758
SD		 4104 case NETDEV_DOWN:
4105 case NETDEV_UP:
4106 case NETDEV_CHANGE: {
4107 struct macsec_dev *m, *n;
4108 struct macsec_rxh_data *rxd;
4109
4110 rxd = macsec_data_rtnl(real_dev);
4111 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4112 struct net_device *dev = m->secy.netdev;
4113
4114 netif_stacked_transfer_operstate(real_dev, dev);
4115 }
4116 break;
4117 }
c09440f7
SD		 4118 case NETDEV_UNREGISTER: {
4119 struct macsec_dev *m, *n;
4120 struct macsec_rxh_data *rxd;
4121
4122 rxd = macsec_data_rtnl(real_dev);
4123 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
bbe11fab 4124 macsec_common_dellink(m->secy.netdev, &head);
c09440f7 4125 }
bbe11fab
SD		 4126
4127 netdev_rx_handler_unregister(real_dev);
4128 kfree(rxd);
4129
c09440f7
SD		 4130 unregister_netdevice_many(&head);
4131 break;
4132 }
4133 case NETDEV_CHANGEMTU: {
4134 struct macsec_dev *m;
4135 struct macsec_rxh_data *rxd;
4136
4137 rxd = macsec_data_rtnl(real_dev);
4138 list_for_each_entry(m, &rxd->secys, secys) {
4139 struct net_device *dev = m->secy.netdev;
4140 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4141 macsec_extra_len(true));
4142
4143 if (dev->mtu > mtu)
4144 dev_set_mtu(dev, mtu);
4145 }
4146 }
4147 }
4148
4149 return NOTIFY_OK;
4150}
4151
4152static struct notifier_block macsec_notifier = {
4153 .notifier_call = macsec_notify,
4154};
4155
4156static int __init macsec_init(void)
4157{
4158 int err;
4159
4160 pr_info("MACsec IEEE 802.1AE\n");
4161 err = register_netdevice_notifier(&macsec_notifier);
4162 if (err)
4163 return err;
4164
4165 err = rtnl_link_register(&macsec_link_ops);
4166 if (err)
4167 goto notifier;
4168
489111e5 4169 err = genl_register_family(&macsec_fam);
c09440f7
SD		 4170 if (err)
4171 goto rtnl;
4172
4173 return 0;
4174
4175rtnl:
4176 rtnl_link_unregister(&macsec_link_ops);
4177notifier:
4178 unregister_netdevice_notifier(&macsec_notifier);
4179 return err;
4180}
4181
4182static void __exit macsec_exit(void)
4183{
4184 genl_unregister_family(&macsec_fam);
4185 rtnl_link_unregister(&macsec_link_ops);
4186 unregister_netdevice_notifier(&macsec_notifier);
b196c22a 4187 rcu_barrier();
c09440f7
SD		 4188}
4189
4190module_init(macsec_init);
4191module_exit(macsec_exit);
4192
4193MODULE_ALIAS_RTNL_LINK("macsec");
78362998 4194MODULE_ALIAS_GENL_FAMILY("macsec");
c09440f7
SD		 4195
4196MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4197MODULE_LICENSE("GPL v2");
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