2 * drivers/net/macsec.c - MACsec device
4 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/types.h>
13 #include <linux/skbuff.h>
14 #include <linux/socket.h>
15 #include <linux/module.h>
16 #include <crypto/aead.h>
17 #include <linux/etherdevice.h>
18 #include <linux/rtnetlink.h>
19 #include <net/genetlink.h>
22 #include <uapi/linux/if_macsec.h>
24 typedef u64 __bitwise sci_t
;
26 #define MACSEC_SCI_LEN 8
28 /* SecTAG length = macsec_eth_header without the optional SCI */
29 #define MACSEC_TAG_LEN 6
31 struct macsec_eth_header
{
35 #if defined(__LITTLE_ENDIAN_BITFIELD)
38 #elif defined(__BIG_ENDIAN_BITFIELD)
42 #error "Please fix <asm/byteorder.h>"
45 u8 secure_channel_id
[8]; /* optional */
48 #define MACSEC_TCI_VERSION 0x80
49 #define MACSEC_TCI_ES 0x40 /* end station */
50 #define MACSEC_TCI_SC 0x20 /* SCI present */
51 #define MACSEC_TCI_SCB 0x10 /* epon */
52 #define MACSEC_TCI_E 0x08 /* encryption */
53 #define MACSEC_TCI_C 0x04 /* changed text */
54 #define MACSEC_AN_MASK 0x03 /* association number */
55 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
57 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
58 #define MIN_NON_SHORT_LEN 48
60 #define GCM_AES_IV_LEN 12
61 #define DEFAULT_ICV_LEN 16
63 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
65 #define for_each_rxsc(secy, sc) \
66 for (sc = rcu_dereference_bh(secy->rx_sc); \
68 sc = rcu_dereference_bh(sc->next))
69 #define for_each_rxsc_rtnl(secy, sc) \
70 for (sc = rtnl_dereference(secy->rx_sc); \
72 sc = rtnl_dereference(sc->next))
76 u8 secure_channel_id
[8];
83 * struct macsec_key - SA key
84 * @id: user-provided key identifier
85 * @tfm: crypto struct, key storage
89 struct crypto_aead
*tfm
;
92 struct macsec_rx_sc_stats
{
93 __u64 InOctetsValidated
;
94 __u64 InOctetsDecrypted
;
95 __u64 InPktsUnchecked
;
100 __u64 InPktsNotValid
;
101 __u64 InPktsNotUsingSA
;
102 __u64 InPktsUnusedSA
;
105 struct macsec_rx_sa_stats
{
108 __u32 InPktsNotValid
;
109 __u32 InPktsNotUsingSA
;
110 __u32 InPktsUnusedSA
;
113 struct macsec_tx_sa_stats
{
114 __u32 OutPktsProtected
;
115 __u32 OutPktsEncrypted
;
118 struct macsec_tx_sc_stats
{
119 __u64 OutPktsProtected
;
120 __u64 OutPktsEncrypted
;
121 __u64 OutOctetsProtected
;
122 __u64 OutOctetsEncrypted
;
125 struct macsec_dev_stats
{
126 __u64 OutPktsUntagged
;
127 __u64 InPktsUntagged
;
128 __u64 OutPktsTooLong
;
131 __u64 InPktsUnknownSCI
;
137 * struct macsec_rx_sa - receive secure association
139 * @next_pn: packet number expected for the next packet
140 * @lock: protects next_pn manipulations
141 * @key: key structure
142 * @stats: per-SA stats
144 struct macsec_rx_sa
{
145 struct macsec_key key
;
150 struct macsec_rx_sa_stats __percpu
*stats
;
151 struct macsec_rx_sc
*sc
;
155 struct pcpu_rx_sc_stats
{
156 struct macsec_rx_sc_stats stats
;
157 struct u64_stats_sync syncp
;
161 * struct macsec_rx_sc - receive secure channel
162 * @sci: secure channel identifier for this SC
163 * @active: channel is active
164 * @sa: array of secure associations
165 * @stats: per-SC stats
167 struct macsec_rx_sc
{
168 struct macsec_rx_sc __rcu
*next
;
171 struct macsec_rx_sa __rcu
*sa
[MACSEC_NUM_AN
];
172 struct pcpu_rx_sc_stats __percpu
*stats
;
174 struct rcu_head rcu_head
;
178 * struct macsec_tx_sa - transmit secure association
180 * @next_pn: packet number to use for the next packet
181 * @lock: protects next_pn manipulations
182 * @key: key structure
183 * @stats: per-SA stats
185 struct macsec_tx_sa
{
186 struct macsec_key key
;
191 struct macsec_tx_sa_stats __percpu
*stats
;
195 struct pcpu_tx_sc_stats
{
196 struct macsec_tx_sc_stats stats
;
197 struct u64_stats_sync syncp
;
201 * struct macsec_tx_sc - transmit secure channel
203 * @encoding_sa: association number of the SA currently in use
204 * @encrypt: encrypt packets on transmit, or authenticate only
205 * @send_sci: always include the SCI in the SecTAG
207 * @scb: single copy broadcast flag
208 * @sa: array of secure associations
209 * @stats: stats for this TXSC
211 struct macsec_tx_sc
{
218 struct macsec_tx_sa __rcu
*sa
[MACSEC_NUM_AN
];
219 struct pcpu_tx_sc_stats __percpu
*stats
;
222 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
225 * struct macsec_secy - MACsec Security Entity
226 * @netdev: netdevice for this SecY
227 * @n_rx_sc: number of receive secure channels configured on this SecY
228 * @sci: secure channel identifier used for tx
229 * @key_len: length of keys used by the cipher suite
230 * @icv_len: length of ICV used by the cipher suite
231 * @validate_frames: validation mode
232 * @operational: MAC_Operational flag
233 * @protect_frames: enable protection for this SecY
234 * @replay_protect: enable packet number checks on receive
235 * @replay_window: size of the replay window
236 * @tx_sc: transmit secure channel
237 * @rx_sc: linked list of receive secure channels
240 struct net_device
*netdev
;
241 unsigned int n_rx_sc
;
245 enum macsec_validation_type validate_frames
;
250 struct macsec_tx_sc tx_sc
;
251 struct macsec_rx_sc __rcu
*rx_sc
;
254 struct pcpu_secy_stats
{
255 struct macsec_dev_stats stats
;
256 struct u64_stats_sync syncp
;
260 * struct macsec_dev - private data
262 * @real_dev: pointer to underlying netdevice
263 * @stats: MACsec device stats
264 * @secys: linked list of SecY's on the underlying device
267 struct macsec_secy secy
;
268 struct net_device
*real_dev
;
269 struct pcpu_secy_stats __percpu
*stats
;
270 struct list_head secys
;
274 * struct macsec_rxh_data - rx_handler private argument
275 * @secys: linked list of SecY's on this underlying device
277 struct macsec_rxh_data
{
278 struct list_head secys
;
281 static struct macsec_dev
*macsec_priv(const struct net_device
*dev
)
283 return (struct macsec_dev
*)netdev_priv(dev
);
286 static struct macsec_rxh_data
*macsec_data_rcu(const struct net_device
*dev
)
288 return rcu_dereference_bh(dev
->rx_handler_data
);
291 static struct macsec_rxh_data
*macsec_data_rtnl(const struct net_device
*dev
)
293 return rtnl_dereference(dev
->rx_handler_data
);
297 struct aead_request
*req
;
299 struct macsec_tx_sa
*tx_sa
;
300 struct macsec_rx_sa
*rx_sa
;
307 static struct macsec_rx_sa
*macsec_rxsa_get(struct macsec_rx_sa __rcu
*ptr
)
309 struct macsec_rx_sa
*sa
= rcu_dereference_bh(ptr
);
311 if (!sa
|| !sa
->active
)
314 if (!atomic_inc_not_zero(&sa
->refcnt
))
320 static void free_rx_sc_rcu(struct rcu_head
*head
)
322 struct macsec_rx_sc
*rx_sc
= container_of(head
, struct macsec_rx_sc
, rcu_head
);
324 free_percpu(rx_sc
->stats
);
328 static struct macsec_rx_sc
*macsec_rxsc_get(struct macsec_rx_sc
*sc
)
330 return atomic_inc_not_zero(&sc
->refcnt
) ? sc
: NULL
;
333 static void macsec_rxsc_put(struct macsec_rx_sc
*sc
)
335 if (atomic_dec_and_test(&sc
->refcnt
))
336 call_rcu(&sc
->rcu_head
, free_rx_sc_rcu
);
339 static void free_rxsa(struct rcu_head
*head
)
341 struct macsec_rx_sa
*sa
= container_of(head
, struct macsec_rx_sa
, rcu
);
343 crypto_free_aead(sa
->key
.tfm
);
344 free_percpu(sa
->stats
);
345 macsec_rxsc_put(sa
->sc
);
349 static void macsec_rxsa_put(struct macsec_rx_sa
*sa
)
351 if (atomic_dec_and_test(&sa
->refcnt
))
352 call_rcu(&sa
->rcu
, free_rxsa
);
355 static struct macsec_tx_sa
*macsec_txsa_get(struct macsec_tx_sa __rcu
*ptr
)
357 struct macsec_tx_sa
*sa
= rcu_dereference_bh(ptr
);
359 if (!sa
|| !sa
->active
)
362 if (!atomic_inc_not_zero(&sa
->refcnt
))
368 static void free_txsa(struct rcu_head
*head
)
370 struct macsec_tx_sa
*sa
= container_of(head
, struct macsec_tx_sa
, rcu
);
372 crypto_free_aead(sa
->key
.tfm
);
373 free_percpu(sa
->stats
);
377 static void macsec_txsa_put(struct macsec_tx_sa
*sa
)
379 if (atomic_dec_and_test(&sa
->refcnt
))
380 call_rcu(&sa
->rcu
, free_txsa
);
383 static struct macsec_cb
*macsec_skb_cb(struct sk_buff
*skb
)
385 BUILD_BUG_ON(sizeof(struct macsec_cb
) > sizeof(skb
->cb
));
386 return (struct macsec_cb
*)skb
->cb
;
389 #define MACSEC_PORT_ES (htons(0x0001))
390 #define MACSEC_PORT_SCB (0x0000)
391 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
393 #define DEFAULT_SAK_LEN 16
394 #define DEFAULT_SEND_SCI true
395 #define DEFAULT_ENCRYPT false
396 #define DEFAULT_ENCODING_SA 0
398 static sci_t
make_sci(u8
*addr
, __be16 port
)
402 memcpy(&sci
, addr
, ETH_ALEN
);
403 memcpy(((char *)&sci
) + ETH_ALEN
, &port
, sizeof(port
));
408 static sci_t
macsec_frame_sci(struct macsec_eth_header
*hdr
, bool sci_present
)
413 memcpy(&sci
, hdr
->secure_channel_id
,
414 sizeof(hdr
->secure_channel_id
));
416 sci
= make_sci(hdr
->eth
.h_source
, MACSEC_PORT_ES
);
421 static unsigned int macsec_sectag_len(bool sci_present
)
423 return MACSEC_TAG_LEN
+ (sci_present
? MACSEC_SCI_LEN
: 0);
426 static unsigned int macsec_hdr_len(bool sci_present
)
428 return macsec_sectag_len(sci_present
) + ETH_HLEN
;
431 static unsigned int macsec_extra_len(bool sci_present
)
433 return macsec_sectag_len(sci_present
) + sizeof(__be16
);
436 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
437 static void macsec_fill_sectag(struct macsec_eth_header
*h
,
438 const struct macsec_secy
*secy
, u32 pn
)
440 const struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
442 memset(&h
->tci_an
, 0, macsec_sectag_len(tx_sc
->send_sci
));
443 h
->eth
.h_proto
= htons(ETH_P_MACSEC
);
445 if (tx_sc
->send_sci
||
446 (secy
->n_rx_sc
> 1 && !tx_sc
->end_station
&& !tx_sc
->scb
)) {
447 h
->tci_an
|= MACSEC_TCI_SC
;
448 memcpy(&h
->secure_channel_id
, &secy
->sci
,
449 sizeof(h
->secure_channel_id
));
451 if (tx_sc
->end_station
)
452 h
->tci_an
|= MACSEC_TCI_ES
;
454 h
->tci_an
|= MACSEC_TCI_SCB
;
457 h
->packet_number
= htonl(pn
);
459 /* with GCM, C/E clear for !encrypt, both set for encrypt */
461 h
->tci_an
|= MACSEC_TCI_CONFID
;
462 else if (secy
->icv_len
!= DEFAULT_ICV_LEN
)
463 h
->tci_an
|= MACSEC_TCI_C
;
465 h
->tci_an
|= tx_sc
->encoding_sa
;
468 static void macsec_set_shortlen(struct macsec_eth_header
*h
, size_t data_len
)
470 if (data_len
< MIN_NON_SHORT_LEN
)
471 h
->short_length
= data_len
;
474 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
475 static bool macsec_validate_skb(struct sk_buff
*skb
, u16 icv_len
)
477 struct macsec_eth_header
*h
= (struct macsec_eth_header
*)skb
->data
;
478 int len
= skb
->len
- 2 * ETH_ALEN
;
479 int extra_len
= macsec_extra_len(!!(h
->tci_an
& MACSEC_TCI_SC
)) + icv_len
;
481 /* a) It comprises at least 17 octets */
485 /* b) MACsec EtherType: already checked */
487 /* c) V bit is clear */
488 if (h
->tci_an
& MACSEC_TCI_VERSION
)
491 /* d) ES or SCB => !SC */
492 if ((h
->tci_an
& MACSEC_TCI_ES
|| h
->tci_an
& MACSEC_TCI_SCB
) &&
493 (h
->tci_an
& MACSEC_TCI_SC
))
496 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
500 /* rx.pn != 0 (figure 10-5) */
501 if (!h
->packet_number
)
504 /* length check, f) g) h) i) */
506 return len
== extra_len
+ h
->short_length
;
507 return len
>= extra_len
+ MIN_NON_SHORT_LEN
;
510 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
511 #define MACSEC_NEEDED_TAILROOM MACSEC_MAX_ICV_LEN
513 static void macsec_fill_iv(unsigned char *iv
, sci_t sci
, u32 pn
)
515 struct gcm_iv
*gcm_iv
= (struct gcm_iv
*)iv
;
518 gcm_iv
->pn
= htonl(pn
);
521 static struct macsec_eth_header
*macsec_ethhdr(struct sk_buff
*skb
)
523 return (struct macsec_eth_header
*)skb_mac_header(skb
);
526 static u32
tx_sa_update_pn(struct macsec_tx_sa
*tx_sa
, struct macsec_secy
*secy
)
530 spin_lock_bh(&tx_sa
->lock
);
534 if (tx_sa
->next_pn
== 0) {
535 pr_debug("PN wrapped, transitioning to !oper\n");
536 tx_sa
->active
= false;
537 if (secy
->protect_frames
)
538 secy
->operational
= false;
540 spin_unlock_bh(&tx_sa
->lock
);
545 static void macsec_encrypt_finish(struct sk_buff
*skb
, struct net_device
*dev
)
547 struct macsec_dev
*macsec
= netdev_priv(dev
);
549 skb
->dev
= macsec
->real_dev
;
550 skb_reset_mac_header(skb
);
551 skb
->protocol
= eth_hdr(skb
)->h_proto
;
554 static void macsec_count_tx(struct sk_buff
*skb
, struct macsec_tx_sc
*tx_sc
,
555 struct macsec_tx_sa
*tx_sa
)
557 struct pcpu_tx_sc_stats
*txsc_stats
= this_cpu_ptr(tx_sc
->stats
);
559 u64_stats_update_begin(&txsc_stats
->syncp
);
560 if (tx_sc
->encrypt
) {
561 txsc_stats
->stats
.OutOctetsEncrypted
+= skb
->len
;
562 txsc_stats
->stats
.OutPktsEncrypted
++;
563 this_cpu_inc(tx_sa
->stats
->OutPktsEncrypted
);
565 txsc_stats
->stats
.OutOctetsProtected
+= skb
->len
;
566 txsc_stats
->stats
.OutPktsProtected
++;
567 this_cpu_inc(tx_sa
->stats
->OutPktsProtected
);
569 u64_stats_update_end(&txsc_stats
->syncp
);
572 static void count_tx(struct net_device
*dev
, int ret
, int len
)
574 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
575 struct pcpu_sw_netstats
*stats
= this_cpu_ptr(dev
->tstats
);
577 u64_stats_update_begin(&stats
->syncp
);
579 stats
->tx_bytes
+= len
;
580 u64_stats_update_end(&stats
->syncp
);
582 dev
->stats
.tx_dropped
++;
586 static void macsec_encrypt_done(struct crypto_async_request
*base
, int err
)
588 struct sk_buff
*skb
= base
->data
;
589 struct net_device
*dev
= skb
->dev
;
590 struct macsec_dev
*macsec
= macsec_priv(dev
);
591 struct macsec_tx_sa
*sa
= macsec_skb_cb(skb
)->tx_sa
;
594 aead_request_free(macsec_skb_cb(skb
)->req
);
597 macsec_encrypt_finish(skb
, dev
);
598 macsec_count_tx(skb
, &macsec
->secy
.tx_sc
, macsec_skb_cb(skb
)->tx_sa
);
600 ret
= dev_queue_xmit(skb
);
601 count_tx(dev
, ret
, len
);
602 rcu_read_unlock_bh();
608 static struct sk_buff
*macsec_encrypt(struct sk_buff
*skb
,
609 struct net_device
*dev
)
612 struct scatterlist sg
[MAX_SKB_FRAGS
+ 1];
613 unsigned char iv
[GCM_AES_IV_LEN
];
615 struct macsec_eth_header
*hh
;
616 size_t unprotected_len
;
617 struct aead_request
*req
;
618 struct macsec_secy
*secy
;
619 struct macsec_tx_sc
*tx_sc
;
620 struct macsec_tx_sa
*tx_sa
;
621 struct macsec_dev
*macsec
= macsec_priv(dev
);
624 secy
= &macsec
->secy
;
625 tx_sc
= &secy
->tx_sc
;
627 /* 10.5.1 TX SA assignment */
628 tx_sa
= macsec_txsa_get(tx_sc
->sa
[tx_sc
->encoding_sa
]);
630 secy
->operational
= false;
632 return ERR_PTR(-EINVAL
);
635 if (unlikely(skb_headroom(skb
) < MACSEC_NEEDED_HEADROOM
||
636 skb_tailroom(skb
) < MACSEC_NEEDED_TAILROOM
)) {
637 struct sk_buff
*nskb
= skb_copy_expand(skb
,
638 MACSEC_NEEDED_HEADROOM
,
639 MACSEC_NEEDED_TAILROOM
,
645 macsec_txsa_put(tx_sa
);
647 return ERR_PTR(-ENOMEM
);
650 skb
= skb_unshare(skb
, GFP_ATOMIC
);
652 macsec_txsa_put(tx_sa
);
653 return ERR_PTR(-ENOMEM
);
657 unprotected_len
= skb
->len
;
659 hh
= (struct macsec_eth_header
*)skb_push(skb
, macsec_extra_len(tx_sc
->send_sci
));
660 memmove(hh
, eth
, 2 * ETH_ALEN
);
662 pn
= tx_sa_update_pn(tx_sa
, secy
);
664 macsec_txsa_put(tx_sa
);
666 return ERR_PTR(-ENOLINK
);
668 macsec_fill_sectag(hh
, secy
, pn
);
669 macsec_set_shortlen(hh
, unprotected_len
- 2 * ETH_ALEN
);
671 macsec_fill_iv(iv
, secy
->sci
, pn
);
673 skb_put(skb
, secy
->icv_len
);
675 if (skb
->len
- ETH_HLEN
> macsec_priv(dev
)->real_dev
->mtu
) {
676 struct pcpu_secy_stats
*secy_stats
= this_cpu_ptr(macsec
->stats
);
678 u64_stats_update_begin(&secy_stats
->syncp
);
679 secy_stats
->stats
.OutPktsTooLong
++;
680 u64_stats_update_end(&secy_stats
->syncp
);
682 macsec_txsa_put(tx_sa
);
684 return ERR_PTR(-EINVAL
);
687 req
= aead_request_alloc(tx_sa
->key
.tfm
, GFP_ATOMIC
);
689 macsec_txsa_put(tx_sa
);
691 return ERR_PTR(-ENOMEM
);
694 sg_init_table(sg
, MAX_SKB_FRAGS
+ 1);
695 skb_to_sgvec(skb
, sg
, 0, skb
->len
);
697 if (tx_sc
->encrypt
) {
698 int len
= skb
->len
- macsec_hdr_len(tx_sc
->send_sci
) -
700 aead_request_set_crypt(req
, sg
, sg
, len
, iv
);
701 aead_request_set_ad(req
, macsec_hdr_len(tx_sc
->send_sci
));
703 aead_request_set_crypt(req
, sg
, sg
, 0, iv
);
704 aead_request_set_ad(req
, skb
->len
- secy
->icv_len
);
707 macsec_skb_cb(skb
)->req
= req
;
708 macsec_skb_cb(skb
)->tx_sa
= tx_sa
;
709 aead_request_set_callback(req
, 0, macsec_encrypt_done
, skb
);
712 ret
= crypto_aead_encrypt(req
);
713 if (ret
== -EINPROGRESS
) {
715 } else if (ret
!= 0) {
718 aead_request_free(req
);
719 macsec_txsa_put(tx_sa
);
720 return ERR_PTR(-EINVAL
);
724 aead_request_free(req
);
725 macsec_txsa_put(tx_sa
);
730 static bool macsec_post_decrypt(struct sk_buff
*skb
, struct macsec_secy
*secy
, u32 pn
)
732 struct macsec_rx_sa
*rx_sa
= macsec_skb_cb(skb
)->rx_sa
;
733 struct pcpu_rx_sc_stats
*rxsc_stats
= this_cpu_ptr(rx_sa
->sc
->stats
);
734 struct macsec_eth_header
*hdr
= macsec_ethhdr(skb
);
737 spin_lock(&rx_sa
->lock
);
738 if (rx_sa
->next_pn
>= secy
->replay_window
)
739 lowest_pn
= rx_sa
->next_pn
- secy
->replay_window
;
741 /* Now perform replay protection check again
742 * (see IEEE 802.1AE-2006 figure 10-5)
744 if (secy
->replay_protect
&& pn
< lowest_pn
) {
745 spin_unlock(&rx_sa
->lock
);
746 u64_stats_update_begin(&rxsc_stats
->syncp
);
747 rxsc_stats
->stats
.InPktsLate
++;
748 u64_stats_update_end(&rxsc_stats
->syncp
);
752 if (secy
->validate_frames
!= MACSEC_VALIDATE_DISABLED
) {
753 u64_stats_update_begin(&rxsc_stats
->syncp
);
754 if (hdr
->tci_an
& MACSEC_TCI_E
)
755 rxsc_stats
->stats
.InOctetsDecrypted
+= skb
->len
;
757 rxsc_stats
->stats
.InOctetsValidated
+= skb
->len
;
758 u64_stats_update_end(&rxsc_stats
->syncp
);
761 if (!macsec_skb_cb(skb
)->valid
) {
762 spin_unlock(&rx_sa
->lock
);
765 if (hdr
->tci_an
& MACSEC_TCI_C
||
766 secy
->validate_frames
== MACSEC_VALIDATE_STRICT
) {
767 u64_stats_update_begin(&rxsc_stats
->syncp
);
768 rxsc_stats
->stats
.InPktsNotValid
++;
769 u64_stats_update_end(&rxsc_stats
->syncp
);
773 u64_stats_update_begin(&rxsc_stats
->syncp
);
774 if (secy
->validate_frames
== MACSEC_VALIDATE_CHECK
) {
775 rxsc_stats
->stats
.InPktsInvalid
++;
776 this_cpu_inc(rx_sa
->stats
->InPktsInvalid
);
777 } else if (pn
< lowest_pn
) {
778 rxsc_stats
->stats
.InPktsDelayed
++;
780 rxsc_stats
->stats
.InPktsUnchecked
++;
782 u64_stats_update_end(&rxsc_stats
->syncp
);
784 u64_stats_update_begin(&rxsc_stats
->syncp
);
785 if (pn
< lowest_pn
) {
786 rxsc_stats
->stats
.InPktsDelayed
++;
788 rxsc_stats
->stats
.InPktsOK
++;
789 this_cpu_inc(rx_sa
->stats
->InPktsOK
);
791 u64_stats_update_end(&rxsc_stats
->syncp
);
793 if (pn
>= rx_sa
->next_pn
)
794 rx_sa
->next_pn
= pn
+ 1;
795 spin_unlock(&rx_sa
->lock
);
801 static void macsec_reset_skb(struct sk_buff
*skb
, struct net_device
*dev
)
803 skb
->pkt_type
= PACKET_HOST
;
804 skb
->protocol
= eth_type_trans(skb
, dev
);
806 skb_reset_network_header(skb
);
807 if (!skb_transport_header_was_set(skb
))
808 skb_reset_transport_header(skb
);
809 skb_reset_mac_len(skb
);
812 static void macsec_finalize_skb(struct sk_buff
*skb
, u8 icv_len
, u8 hdr_len
)
814 memmove(skb
->data
+ hdr_len
, skb
->data
, 2 * ETH_ALEN
);
815 skb_pull(skb
, hdr_len
);
816 pskb_trim_unique(skb
, skb
->len
- icv_len
);
819 static void count_rx(struct net_device
*dev
, int len
)
821 struct pcpu_sw_netstats
*stats
= this_cpu_ptr(dev
->tstats
);
823 u64_stats_update_begin(&stats
->syncp
);
825 stats
->rx_bytes
+= len
;
826 u64_stats_update_end(&stats
->syncp
);
829 static void macsec_decrypt_done(struct crypto_async_request
*base
, int err
)
831 struct sk_buff
*skb
= base
->data
;
832 struct net_device
*dev
= skb
->dev
;
833 struct macsec_dev
*macsec
= macsec_priv(dev
);
834 struct macsec_rx_sa
*rx_sa
= macsec_skb_cb(skb
)->rx_sa
;
838 aead_request_free(macsec_skb_cb(skb
)->req
);
841 pn
= ntohl(macsec_ethhdr(skb
)->packet_number
);
842 if (!macsec_post_decrypt(skb
, &macsec
->secy
, pn
)) {
843 rcu_read_unlock_bh();
848 macsec_finalize_skb(skb
, macsec
->secy
.icv_len
,
849 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
850 macsec_reset_skb(skb
, macsec
->secy
.netdev
);
854 if (ret
== NET_RX_SUCCESS
)
857 macsec
->secy
.netdev
->stats
.rx_dropped
++;
859 rcu_read_unlock_bh();
862 macsec_rxsa_put(rx_sa
);
867 static struct sk_buff
*macsec_decrypt(struct sk_buff
*skb
,
868 struct net_device
*dev
,
869 struct macsec_rx_sa
*rx_sa
,
871 struct macsec_secy
*secy
)
874 struct scatterlist sg
[MAX_SKB_FRAGS
+ 1];
875 unsigned char iv
[GCM_AES_IV_LEN
];
876 struct aead_request
*req
;
877 struct macsec_eth_header
*hdr
;
878 u16 icv_len
= secy
->icv_len
;
880 macsec_skb_cb(skb
)->valid
= false;
881 skb
= skb_share_check(skb
, GFP_ATOMIC
);
883 return ERR_PTR(-ENOMEM
);
885 req
= aead_request_alloc(rx_sa
->key
.tfm
, GFP_ATOMIC
);
888 return ERR_PTR(-ENOMEM
);
891 hdr
= (struct macsec_eth_header
*)skb
->data
;
892 macsec_fill_iv(iv
, sci
, ntohl(hdr
->packet_number
));
894 sg_init_table(sg
, MAX_SKB_FRAGS
+ 1);
895 skb_to_sgvec(skb
, sg
, 0, skb
->len
);
897 if (hdr
->tci_an
& MACSEC_TCI_E
) {
898 /* confidentiality: ethernet + macsec header
899 * authenticated, encrypted payload
901 int len
= skb
->len
- macsec_hdr_len(macsec_skb_cb(skb
)->has_sci
);
903 aead_request_set_crypt(req
, sg
, sg
, len
, iv
);
904 aead_request_set_ad(req
, macsec_hdr_len(macsec_skb_cb(skb
)->has_sci
));
905 skb
= skb_unshare(skb
, GFP_ATOMIC
);
907 aead_request_free(req
);
908 return ERR_PTR(-ENOMEM
);
911 /* integrity only: all headers + data authenticated */
912 aead_request_set_crypt(req
, sg
, sg
, icv_len
, iv
);
913 aead_request_set_ad(req
, skb
->len
- icv_len
);
916 macsec_skb_cb(skb
)->req
= req
;
917 macsec_skb_cb(skb
)->rx_sa
= rx_sa
;
919 aead_request_set_callback(req
, 0, macsec_decrypt_done
, skb
);
922 ret
= crypto_aead_decrypt(req
);
923 if (ret
== -EINPROGRESS
) {
925 } else if (ret
!= 0) {
926 /* decryption/authentication failed
927 * 10.6 if validateFrames is disabled, deliver anyway
929 if (ret
!= -EBADMSG
) {
934 macsec_skb_cb(skb
)->valid
= true;
938 aead_request_free(req
);
943 static struct macsec_rx_sc
*find_rx_sc(struct macsec_secy
*secy
, sci_t sci
)
945 struct macsec_rx_sc
*rx_sc
;
947 for_each_rxsc(secy
, rx_sc
) {
948 if (rx_sc
->sci
== sci
)
955 static struct macsec_rx_sc
*find_rx_sc_rtnl(struct macsec_secy
*secy
, sci_t sci
)
957 struct macsec_rx_sc
*rx_sc
;
959 for_each_rxsc_rtnl(secy
, rx_sc
) {
960 if (rx_sc
->sci
== sci
)
967 static void handle_not_macsec(struct sk_buff
*skb
)
969 struct macsec_rxh_data
*rxd
;
970 struct macsec_dev
*macsec
;
973 rxd
= macsec_data_rcu(skb
->dev
);
975 /* 10.6 If the management control validateFrames is not
976 * Strict, frames without a SecTAG are received, counted, and
977 * delivered to the Controlled Port
979 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
980 struct sk_buff
*nskb
;
982 struct pcpu_secy_stats
*secy_stats
= this_cpu_ptr(macsec
->stats
);
984 if (macsec
->secy
.validate_frames
== MACSEC_VALIDATE_STRICT
) {
985 u64_stats_update_begin(&secy_stats
->syncp
);
986 secy_stats
->stats
.InPktsNoTag
++;
987 u64_stats_update_end(&secy_stats
->syncp
);
991 /* deliver on this port */
992 nskb
= skb_clone(skb
, GFP_ATOMIC
);
996 nskb
->dev
= macsec
->secy
.netdev
;
998 ret
= netif_rx(nskb
);
999 if (ret
== NET_RX_SUCCESS
) {
1000 u64_stats_update_begin(&secy_stats
->syncp
);
1001 secy_stats
->stats
.InPktsUntagged
++;
1002 u64_stats_update_end(&secy_stats
->syncp
);
1004 macsec
->secy
.netdev
->stats
.rx_dropped
++;
1011 static rx_handler_result_t
macsec_handle_frame(struct sk_buff
**pskb
)
1013 struct sk_buff
*skb
= *pskb
;
1014 struct net_device
*dev
= skb
->dev
;
1015 struct macsec_eth_header
*hdr
;
1016 struct macsec_secy
*secy
= NULL
;
1017 struct macsec_rx_sc
*rx_sc
;
1018 struct macsec_rx_sa
*rx_sa
;
1019 struct macsec_rxh_data
*rxd
;
1020 struct macsec_dev
*macsec
;
1024 struct pcpu_rx_sc_stats
*rxsc_stats
;
1025 struct pcpu_secy_stats
*secy_stats
;
1028 if (skb_headroom(skb
) < ETH_HLEN
)
1031 hdr
= macsec_ethhdr(skb
);
1032 if (hdr
->eth
.h_proto
!= htons(ETH_P_MACSEC
)) {
1033 handle_not_macsec(skb
);
1035 /* and deliver to the uncontrolled port */
1036 return RX_HANDLER_PASS
;
1039 skb
= skb_unshare(skb
, GFP_ATOMIC
);
1042 return RX_HANDLER_CONSUMED
;
1045 pulled_sci
= pskb_may_pull(skb
, macsec_extra_len(true));
1047 if (!pskb_may_pull(skb
, macsec_extra_len(false)))
1051 hdr
= macsec_ethhdr(skb
);
1053 /* Frames with a SecTAG that has the TCI E bit set but the C
1054 * bit clear are discarded, as this reserved encoding is used
1055 * to identify frames with a SecTAG that are not to be
1056 * delivered to the Controlled Port.
1058 if ((hdr
->tci_an
& (MACSEC_TCI_C
| MACSEC_TCI_E
)) == MACSEC_TCI_E
)
1059 return RX_HANDLER_PASS
;
1061 /* now, pull the extra length */
1062 if (hdr
->tci_an
& MACSEC_TCI_SC
) {
1067 /* ethernet header is part of crypto processing */
1068 skb_push(skb
, ETH_HLEN
);
1070 macsec_skb_cb(skb
)->has_sci
= !!(hdr
->tci_an
& MACSEC_TCI_SC
);
1071 macsec_skb_cb(skb
)->assoc_num
= hdr
->tci_an
& MACSEC_AN_MASK
;
1072 sci
= macsec_frame_sci(hdr
, macsec_skb_cb(skb
)->has_sci
);
1075 rxd
= macsec_data_rcu(skb
->dev
);
1077 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
1078 struct macsec_rx_sc
*sc
= find_rx_sc(&macsec
->secy
, sci
);
1081 secy
= &macsec
->secy
;
1091 macsec
= macsec_priv(dev
);
1092 secy_stats
= this_cpu_ptr(macsec
->stats
);
1093 rxsc_stats
= this_cpu_ptr(rx_sc
->stats
);
1095 if (!macsec_validate_skb(skb
, secy
->icv_len
)) {
1096 u64_stats_update_begin(&secy_stats
->syncp
);
1097 secy_stats
->stats
.InPktsBadTag
++;
1098 u64_stats_update_end(&secy_stats
->syncp
);
1102 rx_sa
= macsec_rxsa_get(rx_sc
->sa
[macsec_skb_cb(skb
)->assoc_num
]);
1104 /* 10.6.1 if the SA is not in use */
1106 /* If validateFrames is Strict or the C bit in the
1107 * SecTAG is set, discard
1109 if (hdr
->tci_an
& MACSEC_TCI_C
||
1110 secy
->validate_frames
== MACSEC_VALIDATE_STRICT
) {
1111 u64_stats_update_begin(&rxsc_stats
->syncp
);
1112 rxsc_stats
->stats
.InPktsNotUsingSA
++;
1113 u64_stats_update_end(&rxsc_stats
->syncp
);
1117 /* not Strict, the frame (with the SecTAG and ICV
1118 * removed) is delivered to the Controlled Port.
1120 u64_stats_update_begin(&rxsc_stats
->syncp
);
1121 rxsc_stats
->stats
.InPktsUnusedSA
++;
1122 u64_stats_update_end(&rxsc_stats
->syncp
);
1126 /* First, PN check to avoid decrypting obviously wrong packets */
1127 pn
= ntohl(hdr
->packet_number
);
1128 if (secy
->replay_protect
) {
1131 spin_lock(&rx_sa
->lock
);
1132 late
= rx_sa
->next_pn
>= secy
->replay_window
&&
1133 pn
< (rx_sa
->next_pn
- secy
->replay_window
);
1134 spin_unlock(&rx_sa
->lock
);
1137 u64_stats_update_begin(&rxsc_stats
->syncp
);
1138 rxsc_stats
->stats
.InPktsLate
++;
1139 u64_stats_update_end(&rxsc_stats
->syncp
);
1144 /* Disabled && !changed text => skip validation */
1145 if (hdr
->tci_an
& MACSEC_TCI_C
||
1146 secy
->validate_frames
!= MACSEC_VALIDATE_DISABLED
)
1147 skb
= macsec_decrypt(skb
, dev
, rx_sa
, sci
, secy
);
1150 /* the decrypt callback needs the reference */
1151 if (PTR_ERR(skb
) != -EINPROGRESS
)
1152 macsec_rxsa_put(rx_sa
);
1155 return RX_HANDLER_CONSUMED
;
1158 if (!macsec_post_decrypt(skb
, secy
, pn
))
1162 macsec_finalize_skb(skb
, secy
->icv_len
,
1163 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
1164 macsec_reset_skb(skb
, secy
->netdev
);
1167 macsec_rxsa_put(rx_sa
);
1168 count_rx(dev
, skb
->len
);
1173 return RX_HANDLER_ANOTHER
;
1176 macsec_rxsa_put(rx_sa
);
1182 return RX_HANDLER_CONSUMED
;
1185 /* 10.6.1 if the SC is not found */
1186 cbit
= !!(hdr
->tci_an
& MACSEC_TCI_C
);
1188 macsec_finalize_skb(skb
, DEFAULT_ICV_LEN
,
1189 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
1191 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
1192 struct sk_buff
*nskb
;
1195 secy_stats
= this_cpu_ptr(macsec
->stats
);
1197 /* If validateFrames is Strict or the C bit in the
1198 * SecTAG is set, discard
1201 macsec
->secy
.validate_frames
== MACSEC_VALIDATE_STRICT
) {
1202 u64_stats_update_begin(&secy_stats
->syncp
);
1203 secy_stats
->stats
.InPktsNoSCI
++;
1204 u64_stats_update_end(&secy_stats
->syncp
);
1208 /* not strict, the frame (with the SecTAG and ICV
1209 * removed) is delivered to the Controlled Port.
1211 nskb
= skb_clone(skb
, GFP_ATOMIC
);
1215 macsec_reset_skb(nskb
, macsec
->secy
.netdev
);
1217 ret
= netif_rx(nskb
);
1218 if (ret
== NET_RX_SUCCESS
) {
1219 u64_stats_update_begin(&secy_stats
->syncp
);
1220 secy_stats
->stats
.InPktsUnknownSCI
++;
1221 u64_stats_update_end(&secy_stats
->syncp
);
1223 macsec
->secy
.netdev
->stats
.rx_dropped
++;
1229 return RX_HANDLER_PASS
;
1232 static struct crypto_aead
*macsec_alloc_tfm(char *key
, int key_len
, int icv_len
)
1234 struct crypto_aead
*tfm
;
1237 tfm
= crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC
);
1238 if (!tfm
|| IS_ERR(tfm
))
1241 ret
= crypto_aead_setkey(tfm
, key
, key_len
);
1243 crypto_free_aead(tfm
);
1247 ret
= crypto_aead_setauthsize(tfm
, icv_len
);
1249 crypto_free_aead(tfm
);
1256 static int init_rx_sa(struct macsec_rx_sa
*rx_sa
, char *sak
, int key_len
,
1259 rx_sa
->stats
= alloc_percpu(struct macsec_rx_sa_stats
);
1263 rx_sa
->key
.tfm
= macsec_alloc_tfm(sak
, key_len
, icv_len
);
1264 if (!rx_sa
->key
.tfm
) {
1265 free_percpu(rx_sa
->stats
);
1269 rx_sa
->active
= false;
1271 atomic_set(&rx_sa
->refcnt
, 1);
1272 spin_lock_init(&rx_sa
->lock
);
1277 static void clear_rx_sa(struct macsec_rx_sa
*rx_sa
)
1279 rx_sa
->active
= false;
1281 macsec_rxsa_put(rx_sa
);
1284 static void free_rx_sc(struct macsec_rx_sc
*rx_sc
)
1288 for (i
= 0; i
< MACSEC_NUM_AN
; i
++) {
1289 struct macsec_rx_sa
*sa
= rtnl_dereference(rx_sc
->sa
[i
]);
1291 RCU_INIT_POINTER(rx_sc
->sa
[i
], NULL
);
1296 macsec_rxsc_put(rx_sc
);
1299 static struct macsec_rx_sc
*del_rx_sc(struct macsec_secy
*secy
, sci_t sci
)
1301 struct macsec_rx_sc
*rx_sc
, __rcu
**rx_scp
;
1303 for (rx_scp
= &secy
->rx_sc
, rx_sc
= rtnl_dereference(*rx_scp
);
1305 rx_scp
= &rx_sc
->next
, rx_sc
= rtnl_dereference(*rx_scp
)) {
1306 if (rx_sc
->sci
== sci
) {
1309 rcu_assign_pointer(*rx_scp
, rx_sc
->next
);
1317 static struct macsec_rx_sc
*create_rx_sc(struct net_device
*dev
, sci_t sci
)
1319 struct macsec_rx_sc
*rx_sc
;
1320 struct macsec_dev
*macsec
;
1321 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
1322 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
1323 struct macsec_secy
*secy
;
1325 list_for_each_entry(macsec
, &rxd
->secys
, secys
) {
1326 if (find_rx_sc_rtnl(&macsec
->secy
, sci
))
1327 return ERR_PTR(-EEXIST
);
1330 rx_sc
= kzalloc(sizeof(*rx_sc
), GFP_KERNEL
);
1332 return ERR_PTR(-ENOMEM
);
1334 rx_sc
->stats
= netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats
);
1335 if (!rx_sc
->stats
) {
1337 return ERR_PTR(-ENOMEM
);
1341 rx_sc
->active
= true;
1342 atomic_set(&rx_sc
->refcnt
, 1);
1344 secy
= &macsec_priv(dev
)->secy
;
1345 rcu_assign_pointer(rx_sc
->next
, secy
->rx_sc
);
1346 rcu_assign_pointer(secy
->rx_sc
, rx_sc
);
1354 static int init_tx_sa(struct macsec_tx_sa
*tx_sa
, char *sak
, int key_len
,
1357 tx_sa
->stats
= alloc_percpu(struct macsec_tx_sa_stats
);
1361 tx_sa
->key
.tfm
= macsec_alloc_tfm(sak
, key_len
, icv_len
);
1362 if (!tx_sa
->key
.tfm
) {
1363 free_percpu(tx_sa
->stats
);
1367 tx_sa
->active
= false;
1368 atomic_set(&tx_sa
->refcnt
, 1);
1369 spin_lock_init(&tx_sa
->lock
);
1374 static void clear_tx_sa(struct macsec_tx_sa
*tx_sa
)
1376 tx_sa
->active
= false;
1378 macsec_txsa_put(tx_sa
);
1381 static struct genl_family macsec_fam
= {
1382 .id
= GENL_ID_GENERATE
,
1383 .name
= MACSEC_GENL_NAME
,
1385 .version
= MACSEC_GENL_VERSION
,
1386 .maxattr
= MACSEC_ATTR_MAX
,
1390 static struct net_device
*get_dev_from_nl(struct net
*net
,
1391 struct nlattr
**attrs
)
1393 int ifindex
= nla_get_u32(attrs
[MACSEC_ATTR_IFINDEX
]);
1394 struct net_device
*dev
;
1396 dev
= __dev_get_by_index(net
, ifindex
);
1398 return ERR_PTR(-ENODEV
);
1400 if (!netif_is_macsec(dev
))
1401 return ERR_PTR(-ENODEV
);
1406 static sci_t
nla_get_sci(const struct nlattr
*nla
)
1408 return (__force sci_t
)nla_get_u64(nla
);
1411 static int nla_put_sci(struct sk_buff
*skb
, int attrtype
, sci_t value
)
1413 return nla_put_u64(skb
, attrtype
, (__force u64
)value
);
1416 static struct macsec_tx_sa
*get_txsa_from_nl(struct net
*net
,
1417 struct nlattr
**attrs
,
1418 struct nlattr
**tb_sa
,
1419 struct net_device
**devp
,
1420 struct macsec_secy
**secyp
,
1421 struct macsec_tx_sc
**scp
,
1424 struct net_device
*dev
;
1425 struct macsec_secy
*secy
;
1426 struct macsec_tx_sc
*tx_sc
;
1427 struct macsec_tx_sa
*tx_sa
;
1429 if (!tb_sa
[MACSEC_SA_ATTR_AN
])
1430 return ERR_PTR(-EINVAL
);
1432 *assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1434 dev
= get_dev_from_nl(net
, attrs
);
1436 return ERR_CAST(dev
);
1438 if (*assoc_num
>= MACSEC_NUM_AN
)
1439 return ERR_PTR(-EINVAL
);
1441 secy
= &macsec_priv(dev
)->secy
;
1442 tx_sc
= &secy
->tx_sc
;
1444 tx_sa
= rtnl_dereference(tx_sc
->sa
[*assoc_num
]);
1446 return ERR_PTR(-ENODEV
);
1454 static struct macsec_rx_sc
*get_rxsc_from_nl(struct net
*net
,
1455 struct nlattr
**attrs
,
1456 struct nlattr
**tb_rxsc
,
1457 struct net_device
**devp
,
1458 struct macsec_secy
**secyp
)
1460 struct net_device
*dev
;
1461 struct macsec_secy
*secy
;
1462 struct macsec_rx_sc
*rx_sc
;
1465 dev
= get_dev_from_nl(net
, attrs
);
1467 return ERR_CAST(dev
);
1469 secy
= &macsec_priv(dev
)->secy
;
1471 if (!tb_rxsc
[MACSEC_RXSC_ATTR_SCI
])
1472 return ERR_PTR(-EINVAL
);
1474 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1475 rx_sc
= find_rx_sc_rtnl(secy
, sci
);
1477 return ERR_PTR(-ENODEV
);
1485 static struct macsec_rx_sa
*get_rxsa_from_nl(struct net
*net
,
1486 struct nlattr
**attrs
,
1487 struct nlattr
**tb_rxsc
,
1488 struct nlattr
**tb_sa
,
1489 struct net_device
**devp
,
1490 struct macsec_secy
**secyp
,
1491 struct macsec_rx_sc
**scp
,
1494 struct macsec_rx_sc
*rx_sc
;
1495 struct macsec_rx_sa
*rx_sa
;
1497 if (!tb_sa
[MACSEC_SA_ATTR_AN
])
1498 return ERR_PTR(-EINVAL
);
1500 *assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1501 if (*assoc_num
>= MACSEC_NUM_AN
)
1502 return ERR_PTR(-EINVAL
);
1504 rx_sc
= get_rxsc_from_nl(net
, attrs
, tb_rxsc
, devp
, secyp
);
1506 return ERR_CAST(rx_sc
);
1508 rx_sa
= rtnl_dereference(rx_sc
->sa
[*assoc_num
]);
1510 return ERR_PTR(-ENODEV
);
1517 static const struct nla_policy macsec_genl_policy
[NUM_MACSEC_ATTR
] = {
1518 [MACSEC_ATTR_IFINDEX
] = { .type
= NLA_U32
},
1519 [MACSEC_ATTR_RXSC_CONFIG
] = { .type
= NLA_NESTED
},
1520 [MACSEC_ATTR_SA_CONFIG
] = { .type
= NLA_NESTED
},
1523 static const struct nla_policy macsec_genl_rxsc_policy
[NUM_MACSEC_RXSC_ATTR
] = {
1524 [MACSEC_RXSC_ATTR_SCI
] = { .type
= NLA_U64
},
1525 [MACSEC_RXSC_ATTR_ACTIVE
] = { .type
= NLA_U8
},
1528 static const struct nla_policy macsec_genl_sa_policy
[NUM_MACSEC_SA_ATTR
] = {
1529 [MACSEC_SA_ATTR_AN
] = { .type
= NLA_U8
},
1530 [MACSEC_SA_ATTR_ACTIVE
] = { .type
= NLA_U8
},
1531 [MACSEC_SA_ATTR_PN
] = { .type
= NLA_U32
},
1532 [MACSEC_SA_ATTR_KEYID
] = { .type
= NLA_U64
},
1533 [MACSEC_SA_ATTR_KEY
] = { .type
= NLA_BINARY
,
1534 .len
= MACSEC_MAX_KEY_LEN
, },
1537 static int parse_sa_config(struct nlattr
**attrs
, struct nlattr
**tb_sa
)
1539 if (!attrs
[MACSEC_ATTR_SA_CONFIG
])
1542 if (nla_parse_nested(tb_sa
, MACSEC_SA_ATTR_MAX
, attrs
[MACSEC_ATTR_SA_CONFIG
],
1543 macsec_genl_sa_policy
))
1549 static int parse_rxsc_config(struct nlattr
**attrs
, struct nlattr
**tb_rxsc
)
1551 if (!attrs
[MACSEC_ATTR_RXSC_CONFIG
])
1554 if (nla_parse_nested(tb_rxsc
, MACSEC_RXSC_ATTR_MAX
, attrs
[MACSEC_ATTR_RXSC_CONFIG
],
1555 macsec_genl_rxsc_policy
))
1561 static bool validate_add_rxsa(struct nlattr
**attrs
)
1563 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1564 !attrs
[MACSEC_SA_ATTR_KEY
] ||
1565 !attrs
[MACSEC_SA_ATTR_KEYID
])
1568 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1571 if (attrs
[MACSEC_SA_ATTR_PN
] && nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1574 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1575 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1582 static int macsec_add_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1584 struct net_device
*dev
;
1585 struct nlattr
**attrs
= info
->attrs
;
1586 struct macsec_secy
*secy
;
1587 struct macsec_rx_sc
*rx_sc
;
1588 struct macsec_rx_sa
*rx_sa
;
1589 unsigned char assoc_num
;
1590 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1591 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1593 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1596 if (parse_sa_config(attrs
, tb_sa
))
1599 if (parse_rxsc_config(attrs
, tb_rxsc
))
1602 if (!validate_add_rxsa(tb_sa
))
1606 rx_sc
= get_rxsc_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, &dev
, &secy
);
1607 if (IS_ERR(rx_sc
) || !macsec_rxsc_get(rx_sc
)) {
1609 return PTR_ERR(rx_sc
);
1612 assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1614 if (nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]) != secy
->key_len
) {
1615 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1616 nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]), secy
->key_len
);
1621 rx_sa
= rtnl_dereference(rx_sc
->sa
[assoc_num
]);
1627 rx_sa
= kmalloc(sizeof(*rx_sa
), GFP_KERNEL
);
1628 if (!rx_sa
|| init_rx_sa(rx_sa
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
1629 secy
->key_len
, secy
->icv_len
)) {
1635 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
1636 spin_lock_bh(&rx_sa
->lock
);
1637 rx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
1638 spin_unlock_bh(&rx_sa
->lock
);
1641 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1642 rx_sa
->active
= !!nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1644 rx_sa
->key
.id
= nla_get_u64(tb_sa
[MACSEC_SA_ATTR_KEYID
]);
1646 rcu_assign_pointer(rx_sc
->sa
[assoc_num
], rx_sa
);
1653 static bool validate_add_rxsc(struct nlattr
**attrs
)
1655 if (!attrs
[MACSEC_RXSC_ATTR_SCI
])
1658 if (attrs
[MACSEC_RXSC_ATTR_ACTIVE
]) {
1659 if (nla_get_u8(attrs
[MACSEC_RXSC_ATTR_ACTIVE
]) > 1)
1666 static int macsec_add_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
1668 struct net_device
*dev
;
1669 sci_t sci
= MACSEC_UNDEF_SCI
;
1670 struct nlattr
**attrs
= info
->attrs
;
1671 struct macsec_rx_sc
*rx_sc
;
1672 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1674 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1677 if (parse_rxsc_config(attrs
, tb_rxsc
))
1680 if (!validate_add_rxsc(tb_rxsc
))
1684 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
1687 return PTR_ERR(dev
);
1690 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1692 rx_sc
= create_rx_sc(dev
, sci
);
1693 if (IS_ERR(rx_sc
)) {
1695 return PTR_ERR(rx_sc
);
1698 if (tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
])
1699 rx_sc
->active
= !!nla_get_u8(tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]);
1706 static bool validate_add_txsa(struct nlattr
**attrs
)
1708 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1709 !attrs
[MACSEC_SA_ATTR_PN
] ||
1710 !attrs
[MACSEC_SA_ATTR_KEY
] ||
1711 !attrs
[MACSEC_SA_ATTR_KEYID
])
1714 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1717 if (nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1720 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1721 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1728 static int macsec_add_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1730 struct net_device
*dev
;
1731 struct nlattr
**attrs
= info
->attrs
;
1732 struct macsec_secy
*secy
;
1733 struct macsec_tx_sc
*tx_sc
;
1734 struct macsec_tx_sa
*tx_sa
;
1735 unsigned char assoc_num
;
1736 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1738 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1741 if (parse_sa_config(attrs
, tb_sa
))
1744 if (!validate_add_txsa(tb_sa
))
1748 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
1751 return PTR_ERR(dev
);
1754 secy
= &macsec_priv(dev
)->secy
;
1755 tx_sc
= &secy
->tx_sc
;
1757 assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1759 if (nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]) != secy
->key_len
) {
1760 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1761 nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]), secy
->key_len
);
1766 tx_sa
= rtnl_dereference(tx_sc
->sa
[assoc_num
]);
1772 tx_sa
= kmalloc(sizeof(*tx_sa
), GFP_KERNEL
);
1773 if (!tx_sa
|| init_tx_sa(tx_sa
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
1774 secy
->key_len
, secy
->icv_len
)) {
1780 tx_sa
->key
.id
= nla_get_u64(tb_sa
[MACSEC_SA_ATTR_KEYID
]);
1782 spin_lock_bh(&tx_sa
->lock
);
1783 tx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
1784 spin_unlock_bh(&tx_sa
->lock
);
1786 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1787 tx_sa
->active
= !!nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1789 if (assoc_num
== tx_sc
->encoding_sa
&& tx_sa
->active
)
1790 secy
->operational
= true;
1792 rcu_assign_pointer(tx_sc
->sa
[assoc_num
], tx_sa
);
1799 static int macsec_del_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1801 struct nlattr
**attrs
= info
->attrs
;
1802 struct net_device
*dev
;
1803 struct macsec_secy
*secy
;
1804 struct macsec_rx_sc
*rx_sc
;
1805 struct macsec_rx_sa
*rx_sa
;
1807 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1808 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1810 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1813 if (parse_sa_config(attrs
, tb_sa
))
1816 if (parse_rxsc_config(attrs
, tb_rxsc
))
1820 rx_sa
= get_rxsa_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, tb_sa
,
1821 &dev
, &secy
, &rx_sc
, &assoc_num
);
1822 if (IS_ERR(rx_sa
)) {
1824 return PTR_ERR(rx_sa
);
1827 if (rx_sa
->active
) {
1832 RCU_INIT_POINTER(rx_sc
->sa
[assoc_num
], NULL
);
1840 static int macsec_del_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
1842 struct nlattr
**attrs
= info
->attrs
;
1843 struct net_device
*dev
;
1844 struct macsec_secy
*secy
;
1845 struct macsec_rx_sc
*rx_sc
;
1847 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1849 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1852 if (parse_rxsc_config(attrs
, tb_rxsc
))
1855 if (!tb_rxsc
[MACSEC_RXSC_ATTR_SCI
])
1859 dev
= get_dev_from_nl(genl_info_net(info
), info
->attrs
);
1862 return PTR_ERR(dev
);
1865 secy
= &macsec_priv(dev
)->secy
;
1866 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1868 rx_sc
= del_rx_sc(secy
, sci
);
1880 static int macsec_del_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1882 struct nlattr
**attrs
= info
->attrs
;
1883 struct net_device
*dev
;
1884 struct macsec_secy
*secy
;
1885 struct macsec_tx_sc
*tx_sc
;
1886 struct macsec_tx_sa
*tx_sa
;
1888 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1890 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1893 if (parse_sa_config(attrs
, tb_sa
))
1897 tx_sa
= get_txsa_from_nl(genl_info_net(info
), attrs
, tb_sa
,
1898 &dev
, &secy
, &tx_sc
, &assoc_num
);
1899 if (IS_ERR(tx_sa
)) {
1901 return PTR_ERR(tx_sa
);
1904 if (tx_sa
->active
) {
1909 RCU_INIT_POINTER(tx_sc
->sa
[assoc_num
], NULL
);
1917 static bool validate_upd_sa(struct nlattr
**attrs
)
1919 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1920 attrs
[MACSEC_SA_ATTR_KEY
] ||
1921 attrs
[MACSEC_SA_ATTR_KEYID
])
1924 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1927 if (attrs
[MACSEC_SA_ATTR_PN
] && nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1930 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1931 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1938 static int macsec_upd_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1940 struct nlattr
**attrs
= info
->attrs
;
1941 struct net_device
*dev
;
1942 struct macsec_secy
*secy
;
1943 struct macsec_tx_sc
*tx_sc
;
1944 struct macsec_tx_sa
*tx_sa
;
1946 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1948 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1951 if (parse_sa_config(attrs
, tb_sa
))
1954 if (!validate_upd_sa(tb_sa
))
1958 tx_sa
= get_txsa_from_nl(genl_info_net(info
), attrs
, tb_sa
,
1959 &dev
, &secy
, &tx_sc
, &assoc_num
);
1960 if (IS_ERR(tx_sa
)) {
1962 return PTR_ERR(tx_sa
);
1965 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
1966 spin_lock_bh(&tx_sa
->lock
);
1967 tx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
1968 spin_unlock_bh(&tx_sa
->lock
);
1971 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1972 tx_sa
->active
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1974 if (assoc_num
== tx_sc
->encoding_sa
)
1975 secy
->operational
= tx_sa
->active
;
1982 static int macsec_upd_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1984 struct nlattr
**attrs
= info
->attrs
;
1985 struct net_device
*dev
;
1986 struct macsec_secy
*secy
;
1987 struct macsec_rx_sc
*rx_sc
;
1988 struct macsec_rx_sa
*rx_sa
;
1990 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1991 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1993 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1996 if (parse_rxsc_config(attrs
, tb_rxsc
))
1999 if (parse_sa_config(attrs
, tb_sa
))
2002 if (!validate_upd_sa(tb_sa
))
2006 rx_sa
= get_rxsa_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, tb_sa
,
2007 &dev
, &secy
, &rx_sc
, &assoc_num
);
2008 if (IS_ERR(rx_sa
)) {
2010 return PTR_ERR(rx_sa
);
2013 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
2014 spin_lock_bh(&rx_sa
->lock
);
2015 rx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
2016 spin_unlock_bh(&rx_sa
->lock
);
2019 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
2020 rx_sa
->active
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
2026 static int macsec_upd_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
2028 struct nlattr
**attrs
= info
->attrs
;
2029 struct net_device
*dev
;
2030 struct macsec_secy
*secy
;
2031 struct macsec_rx_sc
*rx_sc
;
2032 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
2034 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2037 if (parse_rxsc_config(attrs
, tb_rxsc
))
2040 if (!validate_add_rxsc(tb_rxsc
))
2044 rx_sc
= get_rxsc_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, &dev
, &secy
);
2045 if (IS_ERR(rx_sc
)) {
2047 return PTR_ERR(rx_sc
);
2050 if (tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]) {
2051 bool new = !!nla_get_u8(tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]);
2053 if (rx_sc
->active
!= new)
2054 secy
->n_rx_sc
+= new ? 1 : -1;
2056 rx_sc
->active
= new;
2064 static int copy_tx_sa_stats(struct sk_buff
*skb
,
2065 struct macsec_tx_sa_stats __percpu
*pstats
)
2067 struct macsec_tx_sa_stats sum
= {0, };
2070 for_each_possible_cpu(cpu
) {
2071 const struct macsec_tx_sa_stats
*stats
= per_cpu_ptr(pstats
, cpu
);
2073 sum
.OutPktsProtected
+= stats
->OutPktsProtected
;
2074 sum
.OutPktsEncrypted
+= stats
->OutPktsEncrypted
;
2077 if (nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED
, sum
.OutPktsProtected
) ||
2078 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED
, sum
.OutPktsEncrypted
))
2084 static int copy_rx_sa_stats(struct sk_buff
*skb
,
2085 struct macsec_rx_sa_stats __percpu
*pstats
)
2087 struct macsec_rx_sa_stats sum
= {0, };
2090 for_each_possible_cpu(cpu
) {
2091 const struct macsec_rx_sa_stats
*stats
= per_cpu_ptr(pstats
, cpu
);
2093 sum
.InPktsOK
+= stats
->InPktsOK
;
2094 sum
.InPktsInvalid
+= stats
->InPktsInvalid
;
2095 sum
.InPktsNotValid
+= stats
->InPktsNotValid
;
2096 sum
.InPktsNotUsingSA
+= stats
->InPktsNotUsingSA
;
2097 sum
.InPktsUnusedSA
+= stats
->InPktsUnusedSA
;
2100 if (nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_OK
, sum
.InPktsOK
) ||
2101 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID
, sum
.InPktsInvalid
) ||
2102 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID
, sum
.InPktsNotValid
) ||
2103 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA
, sum
.InPktsNotUsingSA
) ||
2104 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA
, sum
.InPktsUnusedSA
))
2110 static int copy_rx_sc_stats(struct sk_buff
*skb
,
2111 struct pcpu_rx_sc_stats __percpu
*pstats
)
2113 struct macsec_rx_sc_stats sum
= {0, };
2116 for_each_possible_cpu(cpu
) {
2117 const struct pcpu_rx_sc_stats
*stats
;
2118 struct macsec_rx_sc_stats tmp
;
2121 stats
= per_cpu_ptr(pstats
, cpu
);
2123 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2124 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2125 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2127 sum
.InOctetsValidated
+= tmp
.InOctetsValidated
;
2128 sum
.InOctetsDecrypted
+= tmp
.InOctetsDecrypted
;
2129 sum
.InPktsUnchecked
+= tmp
.InPktsUnchecked
;
2130 sum
.InPktsDelayed
+= tmp
.InPktsDelayed
;
2131 sum
.InPktsOK
+= tmp
.InPktsOK
;
2132 sum
.InPktsInvalid
+= tmp
.InPktsInvalid
;
2133 sum
.InPktsLate
+= tmp
.InPktsLate
;
2134 sum
.InPktsNotValid
+= tmp
.InPktsNotValid
;
2135 sum
.InPktsNotUsingSA
+= tmp
.InPktsNotUsingSA
;
2136 sum
.InPktsUnusedSA
+= tmp
.InPktsUnusedSA
;
2139 if (nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED
, sum
.InOctetsValidated
) ||
2140 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED
, sum
.InOctetsDecrypted
) ||
2141 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED
, sum
.InPktsUnchecked
) ||
2142 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED
, sum
.InPktsDelayed
) ||
2143 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK
, sum
.InPktsOK
) ||
2144 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID
, sum
.InPktsInvalid
) ||
2145 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE
, sum
.InPktsLate
) ||
2146 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID
, sum
.InPktsNotValid
) ||
2147 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA
, sum
.InPktsNotUsingSA
) ||
2148 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA
, sum
.InPktsUnusedSA
))
2154 static int copy_tx_sc_stats(struct sk_buff
*skb
,
2155 struct pcpu_tx_sc_stats __percpu
*pstats
)
2157 struct macsec_tx_sc_stats sum
= {0, };
2160 for_each_possible_cpu(cpu
) {
2161 const struct pcpu_tx_sc_stats
*stats
;
2162 struct macsec_tx_sc_stats tmp
;
2165 stats
= per_cpu_ptr(pstats
, cpu
);
2167 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2168 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2169 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2171 sum
.OutPktsProtected
+= tmp
.OutPktsProtected
;
2172 sum
.OutPktsEncrypted
+= tmp
.OutPktsEncrypted
;
2173 sum
.OutOctetsProtected
+= tmp
.OutOctetsProtected
;
2174 sum
.OutOctetsEncrypted
+= tmp
.OutOctetsEncrypted
;
2177 if (nla_put_u64(skb
, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED
, sum
.OutPktsProtected
) ||
2178 nla_put_u64(skb
, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED
, sum
.OutPktsEncrypted
) ||
2179 nla_put_u64(skb
, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED
, sum
.OutOctetsProtected
) ||
2180 nla_put_u64(skb
, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED
, sum
.OutOctetsEncrypted
))
2186 static int copy_secy_stats(struct sk_buff
*skb
,
2187 struct pcpu_secy_stats __percpu
*pstats
)
2189 struct macsec_dev_stats sum
= {0, };
2192 for_each_possible_cpu(cpu
) {
2193 const struct pcpu_secy_stats
*stats
;
2194 struct macsec_dev_stats tmp
;
2197 stats
= per_cpu_ptr(pstats
, cpu
);
2199 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2200 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2201 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2203 sum
.OutPktsUntagged
+= tmp
.OutPktsUntagged
;
2204 sum
.InPktsUntagged
+= tmp
.InPktsUntagged
;
2205 sum
.OutPktsTooLong
+= tmp
.OutPktsTooLong
;
2206 sum
.InPktsNoTag
+= tmp
.InPktsNoTag
;
2207 sum
.InPktsBadTag
+= tmp
.InPktsBadTag
;
2208 sum
.InPktsUnknownSCI
+= tmp
.InPktsUnknownSCI
;
2209 sum
.InPktsNoSCI
+= tmp
.InPktsNoSCI
;
2210 sum
.InPktsOverrun
+= tmp
.InPktsOverrun
;
2213 if (nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED
, sum
.OutPktsUntagged
) ||
2214 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED
, sum
.InPktsUntagged
) ||
2215 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG
, sum
.OutPktsTooLong
) ||
2216 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG
, sum
.InPktsNoTag
) ||
2217 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG
, sum
.InPktsBadTag
) ||
2218 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI
, sum
.InPktsUnknownSCI
) ||
2219 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI
, sum
.InPktsNoSCI
) ||
2220 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN
, sum
.InPktsOverrun
))
2226 static int nla_put_secy(struct macsec_secy
*secy
, struct sk_buff
*skb
)
2228 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
2229 struct nlattr
*secy_nest
= nla_nest_start(skb
, MACSEC_ATTR_SECY
);
2234 if (nla_put_sci(skb
, MACSEC_SECY_ATTR_SCI
, secy
->sci
) ||
2235 nla_put_u64(skb
, MACSEC_SECY_ATTR_CIPHER_SUITE
,
2236 MACSEC_DEFAULT_CIPHER_ID
) ||
2237 nla_put_u8(skb
, MACSEC_SECY_ATTR_ICV_LEN
, secy
->icv_len
) ||
2238 nla_put_u8(skb
, MACSEC_SECY_ATTR_OPER
, secy
->operational
) ||
2239 nla_put_u8(skb
, MACSEC_SECY_ATTR_PROTECT
, secy
->protect_frames
) ||
2240 nla_put_u8(skb
, MACSEC_SECY_ATTR_REPLAY
, secy
->replay_protect
) ||
2241 nla_put_u8(skb
, MACSEC_SECY_ATTR_VALIDATE
, secy
->validate_frames
) ||
2242 nla_put_u8(skb
, MACSEC_SECY_ATTR_ENCRYPT
, tx_sc
->encrypt
) ||
2243 nla_put_u8(skb
, MACSEC_SECY_ATTR_INC_SCI
, tx_sc
->send_sci
) ||
2244 nla_put_u8(skb
, MACSEC_SECY_ATTR_ES
, tx_sc
->end_station
) ||
2245 nla_put_u8(skb
, MACSEC_SECY_ATTR_SCB
, tx_sc
->scb
) ||
2246 nla_put_u8(skb
, MACSEC_SECY_ATTR_ENCODING_SA
, tx_sc
->encoding_sa
))
2249 if (secy
->replay_protect
) {
2250 if (nla_put_u32(skb
, MACSEC_SECY_ATTR_WINDOW
, secy
->replay_window
))
2254 nla_nest_end(skb
, secy_nest
);
2258 nla_nest_cancel(skb
, secy_nest
);
2262 static int dump_secy(struct macsec_secy
*secy
, struct net_device
*dev
,
2263 struct sk_buff
*skb
, struct netlink_callback
*cb
)
2265 struct macsec_rx_sc
*rx_sc
;
2266 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
2267 struct nlattr
*txsa_list
, *rxsc_list
;
2270 struct nlattr
*attr
;
2272 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
2273 &macsec_fam
, NLM_F_MULTI
, MACSEC_CMD_GET_TXSC
);
2277 genl_dump_check_consistent(cb
, hdr
, &macsec_fam
);
2279 if (nla_put_u32(skb
, MACSEC_ATTR_IFINDEX
, dev
->ifindex
))
2280 goto nla_put_failure
;
2282 if (nla_put_secy(secy
, skb
))
2283 goto nla_put_failure
;
2285 attr
= nla_nest_start(skb
, MACSEC_ATTR_TXSC_STATS
);
2287 goto nla_put_failure
;
2288 if (copy_tx_sc_stats(skb
, tx_sc
->stats
)) {
2289 nla_nest_cancel(skb
, attr
);
2290 goto nla_put_failure
;
2292 nla_nest_end(skb
, attr
);
2294 attr
= nla_nest_start(skb
, MACSEC_ATTR_SECY_STATS
);
2296 goto nla_put_failure
;
2297 if (copy_secy_stats(skb
, macsec_priv(dev
)->stats
)) {
2298 nla_nest_cancel(skb
, attr
);
2299 goto nla_put_failure
;
2301 nla_nest_end(skb
, attr
);
2303 txsa_list
= nla_nest_start(skb
, MACSEC_ATTR_TXSA_LIST
);
2305 goto nla_put_failure
;
2306 for (i
= 0, j
= 1; i
< MACSEC_NUM_AN
; i
++) {
2307 struct macsec_tx_sa
*tx_sa
= rtnl_dereference(tx_sc
->sa
[i
]);
2308 struct nlattr
*txsa_nest
;
2313 txsa_nest
= nla_nest_start(skb
, j
++);
2315 nla_nest_cancel(skb
, txsa_list
);
2316 goto nla_put_failure
;
2319 if (nla_put_u8(skb
, MACSEC_SA_ATTR_AN
, i
) ||
2320 nla_put_u32(skb
, MACSEC_SA_ATTR_PN
, tx_sa
->next_pn
) ||
2321 nla_put_u64(skb
, MACSEC_SA_ATTR_KEYID
, tx_sa
->key
.id
) ||
2322 nla_put_u8(skb
, MACSEC_SA_ATTR_ACTIVE
, tx_sa
->active
)) {
2323 nla_nest_cancel(skb
, txsa_nest
);
2324 nla_nest_cancel(skb
, txsa_list
);
2325 goto nla_put_failure
;
2328 attr
= nla_nest_start(skb
, MACSEC_SA_ATTR_STATS
);
2330 nla_nest_cancel(skb
, txsa_nest
);
2331 nla_nest_cancel(skb
, txsa_list
);
2332 goto nla_put_failure
;
2334 if (copy_tx_sa_stats(skb
, tx_sa
->stats
)) {
2335 nla_nest_cancel(skb
, attr
);
2336 nla_nest_cancel(skb
, txsa_nest
);
2337 nla_nest_cancel(skb
, txsa_list
);
2338 goto nla_put_failure
;
2340 nla_nest_end(skb
, attr
);
2342 nla_nest_end(skb
, txsa_nest
);
2344 nla_nest_end(skb
, txsa_list
);
2346 rxsc_list
= nla_nest_start(skb
, MACSEC_ATTR_RXSC_LIST
);
2348 goto nla_put_failure
;
2351 for_each_rxsc_rtnl(secy
, rx_sc
) {
2353 struct nlattr
*rxsa_list
;
2354 struct nlattr
*rxsc_nest
= nla_nest_start(skb
, j
++);
2357 nla_nest_cancel(skb
, rxsc_list
);
2358 goto nla_put_failure
;
2361 if (nla_put_u8(skb
, MACSEC_RXSC_ATTR_ACTIVE
, rx_sc
->active
) ||
2362 nla_put_sci(skb
, MACSEC_RXSC_ATTR_SCI
, rx_sc
->sci
)) {
2363 nla_nest_cancel(skb
, rxsc_nest
);
2364 nla_nest_cancel(skb
, rxsc_list
);
2365 goto nla_put_failure
;
2368 attr
= nla_nest_start(skb
, MACSEC_RXSC_ATTR_STATS
);
2370 nla_nest_cancel(skb
, rxsc_nest
);
2371 nla_nest_cancel(skb
, rxsc_list
);
2372 goto nla_put_failure
;
2374 if (copy_rx_sc_stats(skb
, rx_sc
->stats
)) {
2375 nla_nest_cancel(skb
, attr
);
2376 nla_nest_cancel(skb
, rxsc_nest
);
2377 nla_nest_cancel(skb
, rxsc_list
);
2378 goto nla_put_failure
;
2380 nla_nest_end(skb
, attr
);
2382 rxsa_list
= nla_nest_start(skb
, MACSEC_RXSC_ATTR_SA_LIST
);
2384 nla_nest_cancel(skb
, rxsc_nest
);
2385 nla_nest_cancel(skb
, rxsc_list
);
2386 goto nla_put_failure
;
2389 for (i
= 0, k
= 1; i
< MACSEC_NUM_AN
; i
++) {
2390 struct macsec_rx_sa
*rx_sa
= rtnl_dereference(rx_sc
->sa
[i
]);
2391 struct nlattr
*rxsa_nest
;
2396 rxsa_nest
= nla_nest_start(skb
, k
++);
2398 nla_nest_cancel(skb
, rxsa_list
);
2399 nla_nest_cancel(skb
, rxsc_nest
);
2400 nla_nest_cancel(skb
, rxsc_list
);
2401 goto nla_put_failure
;
2404 attr
= nla_nest_start(skb
, MACSEC_SA_ATTR_STATS
);
2406 nla_nest_cancel(skb
, rxsa_list
);
2407 nla_nest_cancel(skb
, rxsc_nest
);
2408 nla_nest_cancel(skb
, rxsc_list
);
2409 goto nla_put_failure
;
2411 if (copy_rx_sa_stats(skb
, rx_sa
->stats
)) {
2412 nla_nest_cancel(skb
, attr
);
2413 nla_nest_cancel(skb
, rxsa_list
);
2414 nla_nest_cancel(skb
, rxsc_nest
);
2415 nla_nest_cancel(skb
, rxsc_list
);
2416 goto nla_put_failure
;
2418 nla_nest_end(skb
, attr
);
2420 if (nla_put_u8(skb
, MACSEC_SA_ATTR_AN
, i
) ||
2421 nla_put_u32(skb
, MACSEC_SA_ATTR_PN
, rx_sa
->next_pn
) ||
2422 nla_put_u64(skb
, MACSEC_SA_ATTR_KEYID
, rx_sa
->key
.id
) ||
2423 nla_put_u8(skb
, MACSEC_SA_ATTR_ACTIVE
, rx_sa
->active
)) {
2424 nla_nest_cancel(skb
, rxsa_nest
);
2425 nla_nest_cancel(skb
, rxsc_nest
);
2426 nla_nest_cancel(skb
, rxsc_list
);
2427 goto nla_put_failure
;
2429 nla_nest_end(skb
, rxsa_nest
);
2432 nla_nest_end(skb
, rxsa_list
);
2433 nla_nest_end(skb
, rxsc_nest
);
2436 nla_nest_end(skb
, rxsc_list
);
2438 genlmsg_end(skb
, hdr
);
2443 genlmsg_cancel(skb
, hdr
);
2447 static int macsec_generation
= 1; /* protected by RTNL */
2449 static int macsec_dump_txsc(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2451 struct net
*net
= sock_net(skb
->sk
);
2452 struct net_device
*dev
;
2455 dev_idx
= cb
->args
[0];
2460 cb
->seq
= macsec_generation
;
2462 for_each_netdev(net
, dev
) {
2463 struct macsec_secy
*secy
;
2468 if (!netif_is_macsec(dev
))
2471 secy
= &macsec_priv(dev
)->secy
;
2472 if (dump_secy(secy
, dev
, skb
, cb
) < 0)
2484 static const struct genl_ops macsec_genl_ops
[] = {
2486 .cmd
= MACSEC_CMD_GET_TXSC
,
2487 .dumpit
= macsec_dump_txsc
,
2488 .policy
= macsec_genl_policy
,
2491 .cmd
= MACSEC_CMD_ADD_RXSC
,
2492 .doit
= macsec_add_rxsc
,
2493 .policy
= macsec_genl_policy
,
2494 .flags
= GENL_ADMIN_PERM
,
2497 .cmd
= MACSEC_CMD_DEL_RXSC
,
2498 .doit
= macsec_del_rxsc
,
2499 .policy
= macsec_genl_policy
,
2500 .flags
= GENL_ADMIN_PERM
,
2503 .cmd
= MACSEC_CMD_UPD_RXSC
,
2504 .doit
= macsec_upd_rxsc
,
2505 .policy
= macsec_genl_policy
,
2506 .flags
= GENL_ADMIN_PERM
,
2509 .cmd
= MACSEC_CMD_ADD_TXSA
,
2510 .doit
= macsec_add_txsa
,
2511 .policy
= macsec_genl_policy
,
2512 .flags
= GENL_ADMIN_PERM
,
2515 .cmd
= MACSEC_CMD_DEL_TXSA
,
2516 .doit
= macsec_del_txsa
,
2517 .policy
= macsec_genl_policy
,
2518 .flags
= GENL_ADMIN_PERM
,
2521 .cmd
= MACSEC_CMD_UPD_TXSA
,
2522 .doit
= macsec_upd_txsa
,
2523 .policy
= macsec_genl_policy
,
2524 .flags
= GENL_ADMIN_PERM
,
2527 .cmd
= MACSEC_CMD_ADD_RXSA
,
2528 .doit
= macsec_add_rxsa
,
2529 .policy
= macsec_genl_policy
,
2530 .flags
= GENL_ADMIN_PERM
,
2533 .cmd
= MACSEC_CMD_DEL_RXSA
,
2534 .doit
= macsec_del_rxsa
,
2535 .policy
= macsec_genl_policy
,
2536 .flags
= GENL_ADMIN_PERM
,
2539 .cmd
= MACSEC_CMD_UPD_RXSA
,
2540 .doit
= macsec_upd_rxsa
,
2541 .policy
= macsec_genl_policy
,
2542 .flags
= GENL_ADMIN_PERM
,
2546 static netdev_tx_t
macsec_start_xmit(struct sk_buff
*skb
,
2547 struct net_device
*dev
)
2549 struct macsec_dev
*macsec
= netdev_priv(dev
);
2550 struct macsec_secy
*secy
= &macsec
->secy
;
2551 struct pcpu_secy_stats
*secy_stats
;
2555 if (!secy
->protect_frames
) {
2556 secy_stats
= this_cpu_ptr(macsec
->stats
);
2557 u64_stats_update_begin(&secy_stats
->syncp
);
2558 secy_stats
->stats
.OutPktsUntagged
++;
2559 u64_stats_update_end(&secy_stats
->syncp
);
2561 ret
= dev_queue_xmit(skb
);
2562 count_tx(dev
, ret
, len
);
2566 if (!secy
->operational
) {
2568 dev
->stats
.tx_dropped
++;
2569 return NETDEV_TX_OK
;
2572 skb
= macsec_encrypt(skb
, dev
);
2574 if (PTR_ERR(skb
) != -EINPROGRESS
)
2575 dev
->stats
.tx_dropped
++;
2576 return NETDEV_TX_OK
;
2579 macsec_count_tx(skb
, &macsec
->secy
.tx_sc
, macsec_skb_cb(skb
)->tx_sa
);
2581 macsec_encrypt_finish(skb
, dev
);
2583 ret
= dev_queue_xmit(skb
);
2584 count_tx(dev
, ret
, len
);
2588 #define MACSEC_FEATURES \
2589 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2590 static int macsec_dev_init(struct net_device
*dev
)
2592 struct macsec_dev
*macsec
= macsec_priv(dev
);
2593 struct net_device
*real_dev
= macsec
->real_dev
;
2595 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
2599 dev
->features
= real_dev
->features
& MACSEC_FEATURES
;
2600 dev
->features
|= NETIF_F_LLTX
| NETIF_F_GSO_SOFTWARE
;
2602 dev
->needed_headroom
= real_dev
->needed_headroom
+
2603 MACSEC_NEEDED_HEADROOM
;
2604 dev
->needed_tailroom
= real_dev
->needed_tailroom
+
2605 MACSEC_NEEDED_TAILROOM
;
2607 if (is_zero_ether_addr(dev
->dev_addr
))
2608 eth_hw_addr_inherit(dev
, real_dev
);
2609 if (is_zero_ether_addr(dev
->broadcast
))
2610 memcpy(dev
->broadcast
, real_dev
->broadcast
, dev
->addr_len
);
2615 static void macsec_dev_uninit(struct net_device
*dev
)
2617 free_percpu(dev
->tstats
);
2620 static netdev_features_t
macsec_fix_features(struct net_device
*dev
,
2621 netdev_features_t features
)
2623 struct macsec_dev
*macsec
= macsec_priv(dev
);
2624 struct net_device
*real_dev
= macsec
->real_dev
;
2626 features
&= real_dev
->features
& MACSEC_FEATURES
;
2627 features
|= NETIF_F_LLTX
| NETIF_F_GSO_SOFTWARE
;
2632 static int macsec_dev_open(struct net_device
*dev
)
2634 struct macsec_dev
*macsec
= macsec_priv(dev
);
2635 struct net_device
*real_dev
= macsec
->real_dev
;
2638 if (!(real_dev
->flags
& IFF_UP
))
2641 err
= dev_uc_add(real_dev
, dev
->dev_addr
);
2645 if (dev
->flags
& IFF_ALLMULTI
) {
2646 err
= dev_set_allmulti(real_dev
, 1);
2651 if (dev
->flags
& IFF_PROMISC
) {
2652 err
= dev_set_promiscuity(real_dev
, 1);
2654 goto clear_allmulti
;
2657 if (netif_carrier_ok(real_dev
))
2658 netif_carrier_on(dev
);
2662 if (dev
->flags
& IFF_ALLMULTI
)
2663 dev_set_allmulti(real_dev
, -1);
2665 dev_uc_del(real_dev
, dev
->dev_addr
);
2666 netif_carrier_off(dev
);
2670 static int macsec_dev_stop(struct net_device
*dev
)
2672 struct macsec_dev
*macsec
= macsec_priv(dev
);
2673 struct net_device
*real_dev
= macsec
->real_dev
;
2675 netif_carrier_off(dev
);
2677 dev_mc_unsync(real_dev
, dev
);
2678 dev_uc_unsync(real_dev
, dev
);
2680 if (dev
->flags
& IFF_ALLMULTI
)
2681 dev_set_allmulti(real_dev
, -1);
2683 if (dev
->flags
& IFF_PROMISC
)
2684 dev_set_promiscuity(real_dev
, -1);
2686 dev_uc_del(real_dev
, dev
->dev_addr
);
2691 static void macsec_dev_change_rx_flags(struct net_device
*dev
, int change
)
2693 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
2695 if (!(dev
->flags
& IFF_UP
))
2698 if (change
& IFF_ALLMULTI
)
2699 dev_set_allmulti(real_dev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
2701 if (change
& IFF_PROMISC
)
2702 dev_set_promiscuity(real_dev
,
2703 dev
->flags
& IFF_PROMISC
? 1 : -1);
2706 static void macsec_dev_set_rx_mode(struct net_device
*dev
)
2708 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
2710 dev_mc_sync(real_dev
, dev
);
2711 dev_uc_sync(real_dev
, dev
);
2714 static int macsec_set_mac_address(struct net_device
*dev
, void *p
)
2716 struct macsec_dev
*macsec
= macsec_priv(dev
);
2717 struct net_device
*real_dev
= macsec
->real_dev
;
2718 struct sockaddr
*addr
= p
;
2721 if (!is_valid_ether_addr(addr
->sa_data
))
2722 return -EADDRNOTAVAIL
;
2724 if (!(dev
->flags
& IFF_UP
))
2727 err
= dev_uc_add(real_dev
, addr
->sa_data
);
2731 dev_uc_del(real_dev
, dev
->dev_addr
);
2734 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
2738 static int macsec_change_mtu(struct net_device
*dev
, int new_mtu
)
2740 struct macsec_dev
*macsec
= macsec_priv(dev
);
2741 unsigned int extra
= macsec
->secy
.icv_len
+ macsec_extra_len(true);
2743 if (macsec
->real_dev
->mtu
- extra
< new_mtu
)
2751 static struct rtnl_link_stats64
*macsec_get_stats64(struct net_device
*dev
,
2752 struct rtnl_link_stats64
*s
)
2759 for_each_possible_cpu(cpu
) {
2760 struct pcpu_sw_netstats
*stats
;
2761 struct pcpu_sw_netstats tmp
;
2764 stats
= per_cpu_ptr(dev
->tstats
, cpu
);
2766 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2767 tmp
.rx_packets
= stats
->rx_packets
;
2768 tmp
.rx_bytes
= stats
->rx_bytes
;
2769 tmp
.tx_packets
= stats
->tx_packets
;
2770 tmp
.tx_bytes
= stats
->tx_bytes
;
2771 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2773 s
->rx_packets
+= tmp
.rx_packets
;
2774 s
->rx_bytes
+= tmp
.rx_bytes
;
2775 s
->tx_packets
+= tmp
.tx_packets
;
2776 s
->tx_bytes
+= tmp
.tx_bytes
;
2779 s
->rx_dropped
= dev
->stats
.rx_dropped
;
2780 s
->tx_dropped
= dev
->stats
.tx_dropped
;
2785 static int macsec_get_iflink(const struct net_device
*dev
)
2787 return macsec_priv(dev
)->real_dev
->ifindex
;
2790 static const struct net_device_ops macsec_netdev_ops
= {
2791 .ndo_init
= macsec_dev_init
,
2792 .ndo_uninit
= macsec_dev_uninit
,
2793 .ndo_open
= macsec_dev_open
,
2794 .ndo_stop
= macsec_dev_stop
,
2795 .ndo_fix_features
= macsec_fix_features
,
2796 .ndo_change_mtu
= macsec_change_mtu
,
2797 .ndo_set_rx_mode
= macsec_dev_set_rx_mode
,
2798 .ndo_change_rx_flags
= macsec_dev_change_rx_flags
,
2799 .ndo_set_mac_address
= macsec_set_mac_address
,
2800 .ndo_start_xmit
= macsec_start_xmit
,
2801 .ndo_get_stats64
= macsec_get_stats64
,
2802 .ndo_get_iflink
= macsec_get_iflink
,
2805 static const struct device_type macsec_type
= {
2809 static const struct nla_policy macsec_rtnl_policy
[IFLA_MACSEC_MAX
+ 1] = {
2810 [IFLA_MACSEC_SCI
] = { .type
= NLA_U64
},
2811 [IFLA_MACSEC_ICV_LEN
] = { .type
= NLA_U8
},
2812 [IFLA_MACSEC_CIPHER_SUITE
] = { .type
= NLA_U64
},
2813 [IFLA_MACSEC_WINDOW
] = { .type
= NLA_U32
},
2814 [IFLA_MACSEC_ENCODING_SA
] = { .type
= NLA_U8
},
2815 [IFLA_MACSEC_ENCRYPT
] = { .type
= NLA_U8
},
2816 [IFLA_MACSEC_PROTECT
] = { .type
= NLA_U8
},
2817 [IFLA_MACSEC_INC_SCI
] = { .type
= NLA_U8
},
2818 [IFLA_MACSEC_ES
] = { .type
= NLA_U8
},
2819 [IFLA_MACSEC_SCB
] = { .type
= NLA_U8
},
2820 [IFLA_MACSEC_REPLAY_PROTECT
] = { .type
= NLA_U8
},
2821 [IFLA_MACSEC_VALIDATION
] = { .type
= NLA_U8
},
2824 static void macsec_free_netdev(struct net_device
*dev
)
2826 struct macsec_dev
*macsec
= macsec_priv(dev
);
2827 struct net_device
*real_dev
= macsec
->real_dev
;
2829 free_percpu(macsec
->stats
);
2830 free_percpu(macsec
->secy
.tx_sc
.stats
);
2836 static void macsec_setup(struct net_device
*dev
)
2839 dev
->tx_queue_len
= 0;
2840 dev
->netdev_ops
= &macsec_netdev_ops
;
2841 dev
->destructor
= macsec_free_netdev
;
2843 eth_zero_addr(dev
->broadcast
);
2846 static void macsec_changelink_common(struct net_device
*dev
,
2847 struct nlattr
*data
[])
2849 struct macsec_secy
*secy
;
2850 struct macsec_tx_sc
*tx_sc
;
2852 secy
= &macsec_priv(dev
)->secy
;
2853 tx_sc
= &secy
->tx_sc
;
2855 if (data
[IFLA_MACSEC_ENCODING_SA
]) {
2856 struct macsec_tx_sa
*tx_sa
;
2858 tx_sc
->encoding_sa
= nla_get_u8(data
[IFLA_MACSEC_ENCODING_SA
]);
2859 tx_sa
= rtnl_dereference(tx_sc
->sa
[tx_sc
->encoding_sa
]);
2861 secy
->operational
= tx_sa
&& tx_sa
->active
;
2864 if (data
[IFLA_MACSEC_WINDOW
])
2865 secy
->replay_window
= nla_get_u32(data
[IFLA_MACSEC_WINDOW
]);
2867 if (data
[IFLA_MACSEC_ENCRYPT
])
2868 tx_sc
->encrypt
= !!nla_get_u8(data
[IFLA_MACSEC_ENCRYPT
]);
2870 if (data
[IFLA_MACSEC_PROTECT
])
2871 secy
->protect_frames
= !!nla_get_u8(data
[IFLA_MACSEC_PROTECT
]);
2873 if (data
[IFLA_MACSEC_INC_SCI
])
2874 tx_sc
->send_sci
= !!nla_get_u8(data
[IFLA_MACSEC_INC_SCI
]);
2876 if (data
[IFLA_MACSEC_ES
])
2877 tx_sc
->end_station
= !!nla_get_u8(data
[IFLA_MACSEC_ES
]);
2879 if (data
[IFLA_MACSEC_SCB
])
2880 tx_sc
->scb
= !!nla_get_u8(data
[IFLA_MACSEC_SCB
]);
2882 if (data
[IFLA_MACSEC_REPLAY_PROTECT
])
2883 secy
->replay_protect
= !!nla_get_u8(data
[IFLA_MACSEC_REPLAY_PROTECT
]);
2885 if (data
[IFLA_MACSEC_VALIDATION
])
2886 secy
->validate_frames
= nla_get_u8(data
[IFLA_MACSEC_VALIDATION
]);
2889 static int macsec_changelink(struct net_device
*dev
, struct nlattr
*tb
[],
2890 struct nlattr
*data
[])
2895 if (data
[IFLA_MACSEC_CIPHER_SUITE
] ||
2896 data
[IFLA_MACSEC_ICV_LEN
] ||
2897 data
[IFLA_MACSEC_SCI
] ||
2898 data
[IFLA_MACSEC_PORT
])
2901 macsec_changelink_common(dev
, data
);
2906 static void macsec_del_dev(struct macsec_dev
*macsec
)
2910 while (macsec
->secy
.rx_sc
) {
2911 struct macsec_rx_sc
*rx_sc
= rtnl_dereference(macsec
->secy
.rx_sc
);
2913 rcu_assign_pointer(macsec
->secy
.rx_sc
, rx_sc
->next
);
2917 for (i
= 0; i
< MACSEC_NUM_AN
; i
++) {
2918 struct macsec_tx_sa
*sa
= rtnl_dereference(macsec
->secy
.tx_sc
.sa
[i
]);
2921 RCU_INIT_POINTER(macsec
->secy
.tx_sc
.sa
[i
], NULL
);
2927 static void macsec_dellink(struct net_device
*dev
, struct list_head
*head
)
2929 struct macsec_dev
*macsec
= macsec_priv(dev
);
2930 struct net_device
*real_dev
= macsec
->real_dev
;
2931 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
2933 macsec_generation
++;
2935 unregister_netdevice_queue(dev
, head
);
2936 list_del_rcu(&macsec
->secys
);
2937 if (list_empty(&rxd
->secys
)) {
2938 netdev_rx_handler_unregister(real_dev
);
2942 macsec_del_dev(macsec
);
2945 static int register_macsec_dev(struct net_device
*real_dev
,
2946 struct net_device
*dev
)
2948 struct macsec_dev
*macsec
= macsec_priv(dev
);
2949 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
2954 rxd
= kmalloc(sizeof(*rxd
), GFP_KERNEL
);
2958 INIT_LIST_HEAD(&rxd
->secys
);
2960 err
= netdev_rx_handler_register(real_dev
, macsec_handle_frame
,
2968 list_add_tail_rcu(&macsec
->secys
, &rxd
->secys
);
2972 static bool sci_exists(struct net_device
*dev
, sci_t sci
)
2974 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(dev
);
2975 struct macsec_dev
*macsec
;
2977 list_for_each_entry(macsec
, &rxd
->secys
, secys
) {
2978 if (macsec
->secy
.sci
== sci
)
2985 static sci_t
dev_to_sci(struct net_device
*dev
, __be16 port
)
2987 return make_sci(dev
->dev_addr
, port
);
2990 static int macsec_add_dev(struct net_device
*dev
, sci_t sci
, u8 icv_len
)
2992 struct macsec_dev
*macsec
= macsec_priv(dev
);
2993 struct macsec_secy
*secy
= &macsec
->secy
;
2995 macsec
->stats
= netdev_alloc_pcpu_stats(struct pcpu_secy_stats
);
2999 secy
->tx_sc
.stats
= netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats
);
3000 if (!secy
->tx_sc
.stats
) {
3001 free_percpu(macsec
->stats
);
3005 if (sci
== MACSEC_UNDEF_SCI
)
3006 sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
3009 secy
->operational
= true;
3010 secy
->key_len
= DEFAULT_SAK_LEN
;
3011 secy
->icv_len
= icv_len
;
3012 secy
->validate_frames
= MACSEC_VALIDATE_DEFAULT
;
3013 secy
->protect_frames
= true;
3014 secy
->replay_protect
= false;
3017 secy
->tx_sc
.active
= true;
3018 secy
->tx_sc
.encoding_sa
= DEFAULT_ENCODING_SA
;
3019 secy
->tx_sc
.encrypt
= DEFAULT_ENCRYPT
;
3020 secy
->tx_sc
.send_sci
= DEFAULT_SEND_SCI
;
3021 secy
->tx_sc
.end_station
= false;
3022 secy
->tx_sc
.scb
= false;
3027 static int macsec_newlink(struct net
*net
, struct net_device
*dev
,
3028 struct nlattr
*tb
[], struct nlattr
*data
[])
3030 struct macsec_dev
*macsec
= macsec_priv(dev
);
3031 struct net_device
*real_dev
;
3034 u8 icv_len
= DEFAULT_ICV_LEN
;
3035 rx_handler_func_t
*rx_handler
;
3039 real_dev
= __dev_get_by_index(net
, nla_get_u32(tb
[IFLA_LINK
]));
3043 dev
->priv_flags
|= IFF_MACSEC
;
3045 macsec
->real_dev
= real_dev
;
3047 if (data
&& data
[IFLA_MACSEC_ICV_LEN
])
3048 icv_len
= nla_get_u8(data
[IFLA_MACSEC_ICV_LEN
]);
3049 dev
->mtu
= real_dev
->mtu
- icv_len
- macsec_extra_len(true);
3051 rx_handler
= rtnl_dereference(real_dev
->rx_handler
);
3052 if (rx_handler
&& rx_handler
!= macsec_handle_frame
)
3055 err
= register_netdevice(dev
);
3059 /* need to be already registered so that ->init has run and
3060 * the MAC addr is set
3062 if (data
&& data
[IFLA_MACSEC_SCI
])
3063 sci
= nla_get_sci(data
[IFLA_MACSEC_SCI
]);
3064 else if (data
&& data
[IFLA_MACSEC_PORT
])
3065 sci
= dev_to_sci(dev
, nla_get_be16(data
[IFLA_MACSEC_PORT
]));
3067 sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
3069 if (rx_handler
&& sci_exists(real_dev
, sci
)) {
3074 err
= macsec_add_dev(dev
, sci
, icv_len
);
3079 macsec_changelink_common(dev
, data
);
3081 err
= register_macsec_dev(real_dev
, dev
);
3085 macsec_generation
++;
3092 macsec_del_dev(macsec
);
3094 unregister_netdevice(dev
);
3098 static int macsec_validate_attr(struct nlattr
*tb
[], struct nlattr
*data
[])
3100 u64 csid
= MACSEC_DEFAULT_CIPHER_ID
;
3101 u8 icv_len
= DEFAULT_ICV_LEN
;
3108 if (data
[IFLA_MACSEC_CIPHER_SUITE
])
3109 csid
= nla_get_u64(data
[IFLA_MACSEC_CIPHER_SUITE
]);
3111 if (data
[IFLA_MACSEC_ICV_LEN
])
3112 icv_len
= nla_get_u8(data
[IFLA_MACSEC_ICV_LEN
]);
3115 case MACSEC_DEFAULT_CIPHER_ID
:
3116 case MACSEC_DEFAULT_CIPHER_ALT
:
3117 if (icv_len
< MACSEC_MIN_ICV_LEN
||
3118 icv_len
> MACSEC_MAX_ICV_LEN
)
3125 if (data
[IFLA_MACSEC_ENCODING_SA
]) {
3126 if (nla_get_u8(data
[IFLA_MACSEC_ENCODING_SA
]) >= MACSEC_NUM_AN
)
3130 for (flag
= IFLA_MACSEC_ENCODING_SA
+ 1;
3131 flag
< IFLA_MACSEC_VALIDATION
;
3134 if (nla_get_u8(data
[flag
]) > 1)
3139 es
= data
[IFLA_MACSEC_ES
] ? nla_get_u8(data
[IFLA_MACSEC_ES
]) : false;
3140 sci
= data
[IFLA_MACSEC_INC_SCI
] ? nla_get_u8(data
[IFLA_MACSEC_INC_SCI
]) : false;
3141 scb
= data
[IFLA_MACSEC_SCB
] ? nla_get_u8(data
[IFLA_MACSEC_SCB
]) : false;
3143 if ((sci
&& (scb
|| es
)) || (scb
&& es
))
3146 if (data
[IFLA_MACSEC_VALIDATION
] &&
3147 nla_get_u8(data
[IFLA_MACSEC_VALIDATION
]) > MACSEC_VALIDATE_MAX
)
3150 if ((data
[IFLA_MACSEC_REPLAY_PROTECT
] &&
3151 nla_get_u8(data
[IFLA_MACSEC_REPLAY_PROTECT
])) &&
3152 !data
[IFLA_MACSEC_WINDOW
])
3158 static struct net
*macsec_get_link_net(const struct net_device
*dev
)
3160 return dev_net(macsec_priv(dev
)->real_dev
);
3163 static size_t macsec_get_size(const struct net_device
*dev
)
3166 nla_total_size(8) + /* SCI */
3167 nla_total_size(1) + /* ICV_LEN */
3168 nla_total_size(8) + /* CIPHER_SUITE */
3169 nla_total_size(4) + /* WINDOW */
3170 nla_total_size(1) + /* ENCODING_SA */
3171 nla_total_size(1) + /* ENCRYPT */
3172 nla_total_size(1) + /* PROTECT */
3173 nla_total_size(1) + /* INC_SCI */
3174 nla_total_size(1) + /* ES */
3175 nla_total_size(1) + /* SCB */
3176 nla_total_size(1) + /* REPLAY_PROTECT */
3177 nla_total_size(1) + /* VALIDATION */
3181 static int macsec_fill_info(struct sk_buff
*skb
,
3182 const struct net_device
*dev
)
3184 struct macsec_secy
*secy
= &macsec_priv(dev
)->secy
;
3185 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
3187 if (nla_put_sci(skb
, IFLA_MACSEC_SCI
, secy
->sci
) ||
3188 nla_put_u8(skb
, IFLA_MACSEC_ICV_LEN
, secy
->icv_len
) ||
3189 nla_put_u64(skb
, IFLA_MACSEC_CIPHER_SUITE
,
3190 MACSEC_DEFAULT_CIPHER_ID
) ||
3191 nla_put_u8(skb
, IFLA_MACSEC_ENCODING_SA
, tx_sc
->encoding_sa
) ||
3192 nla_put_u8(skb
, IFLA_MACSEC_ENCRYPT
, tx_sc
->encrypt
) ||
3193 nla_put_u8(skb
, IFLA_MACSEC_PROTECT
, secy
->protect_frames
) ||
3194 nla_put_u8(skb
, IFLA_MACSEC_INC_SCI
, tx_sc
->send_sci
) ||
3195 nla_put_u8(skb
, IFLA_MACSEC_ES
, tx_sc
->end_station
) ||
3196 nla_put_u8(skb
, IFLA_MACSEC_SCB
, tx_sc
->scb
) ||
3197 nla_put_u8(skb
, IFLA_MACSEC_REPLAY_PROTECT
, secy
->replay_protect
) ||
3198 nla_put_u8(skb
, IFLA_MACSEC_VALIDATION
, secy
->validate_frames
) ||
3200 goto nla_put_failure
;
3202 if (secy
->replay_protect
) {
3203 if (nla_put_u32(skb
, IFLA_MACSEC_WINDOW
, secy
->replay_window
))
3204 goto nla_put_failure
;
3213 static struct rtnl_link_ops macsec_link_ops __read_mostly
= {
3215 .priv_size
= sizeof(struct macsec_dev
),
3216 .maxtype
= IFLA_MACSEC_MAX
,
3217 .policy
= macsec_rtnl_policy
,
3218 .setup
= macsec_setup
,
3219 .validate
= macsec_validate_attr
,
3220 .newlink
= macsec_newlink
,
3221 .changelink
= macsec_changelink
,
3222 .dellink
= macsec_dellink
,
3223 .get_size
= macsec_get_size
,
3224 .fill_info
= macsec_fill_info
,
3225 .get_link_net
= macsec_get_link_net
,
3228 static bool is_macsec_master(struct net_device
*dev
)
3230 return rcu_access_pointer(dev
->rx_handler
) == macsec_handle_frame
;
3233 static int macsec_notify(struct notifier_block
*this, unsigned long event
,
3236 struct net_device
*real_dev
= netdev_notifier_info_to_dev(ptr
);
3239 if (!is_macsec_master(real_dev
))
3243 case NETDEV_UNREGISTER
: {
3244 struct macsec_dev
*m
, *n
;
3245 struct macsec_rxh_data
*rxd
;
3247 rxd
= macsec_data_rtnl(real_dev
);
3248 list_for_each_entry_safe(m
, n
, &rxd
->secys
, secys
) {
3249 macsec_dellink(m
->secy
.netdev
, &head
);
3251 unregister_netdevice_many(&head
);
3254 case NETDEV_CHANGEMTU
: {
3255 struct macsec_dev
*m
;
3256 struct macsec_rxh_data
*rxd
;
3258 rxd
= macsec_data_rtnl(real_dev
);
3259 list_for_each_entry(m
, &rxd
->secys
, secys
) {
3260 struct net_device
*dev
= m
->secy
.netdev
;
3261 unsigned int mtu
= real_dev
->mtu
- (m
->secy
.icv_len
+
3262 macsec_extra_len(true));
3265 dev_set_mtu(dev
, mtu
);
3273 static struct notifier_block macsec_notifier
= {
3274 .notifier_call
= macsec_notify
,
3277 static int __init
macsec_init(void)
3281 pr_info("MACsec IEEE 802.1AE\n");
3282 err
= register_netdevice_notifier(&macsec_notifier
);
3286 err
= rtnl_link_register(&macsec_link_ops
);
3290 err
= genl_register_family_with_ops(&macsec_fam
, macsec_genl_ops
);
3297 rtnl_link_unregister(&macsec_link_ops
);
3299 unregister_netdevice_notifier(&macsec_notifier
);
3303 static void __exit
macsec_exit(void)
3305 genl_unregister_family(&macsec_fam
);
3306 rtnl_link_unregister(&macsec_link_ops
);
3307 unregister_netdevice_notifier(&macsec_notifier
);
3310 module_init(macsec_init
);
3311 module_exit(macsec_exit
);
3313 MODULE_ALIAS_RTNL_LINK("macsec");
3315 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3316 MODULE_LICENSE("GPL v2");