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
88 u8 id
[MACSEC_KEYID_LEN
];
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_BINARY
,
1533 .len
= MACSEC_KEYID_LEN
, },
1534 [MACSEC_SA_ATTR_KEY
] = { .type
= NLA_BINARY
,
1535 .len
= MACSEC_MAX_KEY_LEN
, },
1538 static int parse_sa_config(struct nlattr
**attrs
, struct nlattr
**tb_sa
)
1540 if (!attrs
[MACSEC_ATTR_SA_CONFIG
])
1543 if (nla_parse_nested(tb_sa
, MACSEC_SA_ATTR_MAX
, attrs
[MACSEC_ATTR_SA_CONFIG
],
1544 macsec_genl_sa_policy
))
1550 static int parse_rxsc_config(struct nlattr
**attrs
, struct nlattr
**tb_rxsc
)
1552 if (!attrs
[MACSEC_ATTR_RXSC_CONFIG
])
1555 if (nla_parse_nested(tb_rxsc
, MACSEC_RXSC_ATTR_MAX
, attrs
[MACSEC_ATTR_RXSC_CONFIG
],
1556 macsec_genl_rxsc_policy
))
1562 static bool validate_add_rxsa(struct nlattr
**attrs
)
1564 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1565 !attrs
[MACSEC_SA_ATTR_KEY
] ||
1566 !attrs
[MACSEC_SA_ATTR_KEYID
])
1569 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1572 if (attrs
[MACSEC_SA_ATTR_PN
] && nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1575 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1576 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1580 if (nla_len(attrs
[MACSEC_SA_ATTR_KEYID
]) != MACSEC_KEYID_LEN
)
1586 static int macsec_add_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1588 struct net_device
*dev
;
1589 struct nlattr
**attrs
= info
->attrs
;
1590 struct macsec_secy
*secy
;
1591 struct macsec_rx_sc
*rx_sc
;
1592 struct macsec_rx_sa
*rx_sa
;
1593 unsigned char assoc_num
;
1594 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1595 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1597 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1600 if (parse_sa_config(attrs
, tb_sa
))
1603 if (parse_rxsc_config(attrs
, tb_rxsc
))
1606 if (!validate_add_rxsa(tb_sa
))
1610 rx_sc
= get_rxsc_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, &dev
, &secy
);
1611 if (IS_ERR(rx_sc
) || !macsec_rxsc_get(rx_sc
)) {
1613 return PTR_ERR(rx_sc
);
1616 assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1618 if (nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]) != secy
->key_len
) {
1619 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1620 nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]), secy
->key_len
);
1625 rx_sa
= rtnl_dereference(rx_sc
->sa
[assoc_num
]);
1631 rx_sa
= kmalloc(sizeof(*rx_sa
), GFP_KERNEL
);
1632 if (!rx_sa
|| init_rx_sa(rx_sa
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
1633 secy
->key_len
, secy
->icv_len
)) {
1639 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
1640 spin_lock_bh(&rx_sa
->lock
);
1641 rx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
1642 spin_unlock_bh(&rx_sa
->lock
);
1645 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1646 rx_sa
->active
= !!nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1648 nla_memcpy(rx_sa
->key
.id
, tb_sa
[MACSEC_SA_ATTR_KEY
], MACSEC_KEYID_LEN
);
1650 rcu_assign_pointer(rx_sc
->sa
[assoc_num
], rx_sa
);
1657 static bool validate_add_rxsc(struct nlattr
**attrs
)
1659 if (!attrs
[MACSEC_RXSC_ATTR_SCI
])
1662 if (attrs
[MACSEC_RXSC_ATTR_ACTIVE
]) {
1663 if (nla_get_u8(attrs
[MACSEC_RXSC_ATTR_ACTIVE
]) > 1)
1670 static int macsec_add_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
1672 struct net_device
*dev
;
1673 sci_t sci
= MACSEC_UNDEF_SCI
;
1674 struct nlattr
**attrs
= info
->attrs
;
1675 struct macsec_rx_sc
*rx_sc
;
1676 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1678 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1681 if (parse_rxsc_config(attrs
, tb_rxsc
))
1684 if (!validate_add_rxsc(tb_rxsc
))
1688 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
1691 return PTR_ERR(dev
);
1694 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1696 rx_sc
= create_rx_sc(dev
, sci
);
1697 if (IS_ERR(rx_sc
)) {
1699 return PTR_ERR(rx_sc
);
1702 if (tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
])
1703 rx_sc
->active
= !!nla_get_u8(tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]);
1710 static bool validate_add_txsa(struct nlattr
**attrs
)
1712 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1713 !attrs
[MACSEC_SA_ATTR_PN
] ||
1714 !attrs
[MACSEC_SA_ATTR_KEY
] ||
1715 !attrs
[MACSEC_SA_ATTR_KEYID
])
1718 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1721 if (nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1724 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1725 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1729 if (nla_len(attrs
[MACSEC_SA_ATTR_KEYID
]) != MACSEC_KEYID_LEN
)
1735 static int macsec_add_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1737 struct net_device
*dev
;
1738 struct nlattr
**attrs
= info
->attrs
;
1739 struct macsec_secy
*secy
;
1740 struct macsec_tx_sc
*tx_sc
;
1741 struct macsec_tx_sa
*tx_sa
;
1742 unsigned char assoc_num
;
1743 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1745 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1748 if (parse_sa_config(attrs
, tb_sa
))
1751 if (!validate_add_txsa(tb_sa
))
1755 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
1758 return PTR_ERR(dev
);
1761 secy
= &macsec_priv(dev
)->secy
;
1762 tx_sc
= &secy
->tx_sc
;
1764 assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1766 if (nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]) != secy
->key_len
) {
1767 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1768 nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]), secy
->key_len
);
1773 tx_sa
= rtnl_dereference(tx_sc
->sa
[assoc_num
]);
1779 tx_sa
= kmalloc(sizeof(*tx_sa
), GFP_KERNEL
);
1780 if (!tx_sa
|| init_tx_sa(tx_sa
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
1781 secy
->key_len
, secy
->icv_len
)) {
1787 nla_memcpy(tx_sa
->key
.id
, tb_sa
[MACSEC_SA_ATTR_KEY
], MACSEC_KEYID_LEN
);
1789 spin_lock_bh(&tx_sa
->lock
);
1790 tx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
1791 spin_unlock_bh(&tx_sa
->lock
);
1793 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1794 tx_sa
->active
= !!nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1796 if (assoc_num
== tx_sc
->encoding_sa
&& tx_sa
->active
)
1797 secy
->operational
= true;
1799 rcu_assign_pointer(tx_sc
->sa
[assoc_num
], tx_sa
);
1806 static int macsec_del_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1808 struct nlattr
**attrs
= info
->attrs
;
1809 struct net_device
*dev
;
1810 struct macsec_secy
*secy
;
1811 struct macsec_rx_sc
*rx_sc
;
1812 struct macsec_rx_sa
*rx_sa
;
1814 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1815 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1817 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1820 if (parse_sa_config(attrs
, tb_sa
))
1823 if (parse_rxsc_config(attrs
, tb_rxsc
))
1827 rx_sa
= get_rxsa_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, tb_sa
,
1828 &dev
, &secy
, &rx_sc
, &assoc_num
);
1829 if (IS_ERR(rx_sa
)) {
1831 return PTR_ERR(rx_sa
);
1834 if (rx_sa
->active
) {
1839 RCU_INIT_POINTER(rx_sc
->sa
[assoc_num
], NULL
);
1847 static int macsec_del_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
1849 struct nlattr
**attrs
= info
->attrs
;
1850 struct net_device
*dev
;
1851 struct macsec_secy
*secy
;
1852 struct macsec_rx_sc
*rx_sc
;
1854 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1856 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1859 if (parse_rxsc_config(attrs
, tb_rxsc
))
1862 if (!tb_rxsc
[MACSEC_RXSC_ATTR_SCI
])
1866 dev
= get_dev_from_nl(genl_info_net(info
), info
->attrs
);
1869 return PTR_ERR(dev
);
1872 secy
= &macsec_priv(dev
)->secy
;
1873 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1875 rx_sc
= del_rx_sc(secy
, sci
);
1887 static int macsec_del_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1889 struct nlattr
**attrs
= info
->attrs
;
1890 struct net_device
*dev
;
1891 struct macsec_secy
*secy
;
1892 struct macsec_tx_sc
*tx_sc
;
1893 struct macsec_tx_sa
*tx_sa
;
1895 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1897 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1900 if (parse_sa_config(attrs
, tb_sa
))
1904 tx_sa
= get_txsa_from_nl(genl_info_net(info
), attrs
, tb_sa
,
1905 &dev
, &secy
, &tx_sc
, &assoc_num
);
1906 if (IS_ERR(tx_sa
)) {
1908 return PTR_ERR(tx_sa
);
1911 if (tx_sa
->active
) {
1916 RCU_INIT_POINTER(tx_sc
->sa
[assoc_num
], NULL
);
1924 static bool validate_upd_sa(struct nlattr
**attrs
)
1926 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1927 attrs
[MACSEC_SA_ATTR_KEY
] ||
1928 attrs
[MACSEC_SA_ATTR_KEYID
])
1931 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1934 if (attrs
[MACSEC_SA_ATTR_PN
] && nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1937 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1938 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1945 static int macsec_upd_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1947 struct nlattr
**attrs
= info
->attrs
;
1948 struct net_device
*dev
;
1949 struct macsec_secy
*secy
;
1950 struct macsec_tx_sc
*tx_sc
;
1951 struct macsec_tx_sa
*tx_sa
;
1953 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1955 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1958 if (parse_sa_config(attrs
, tb_sa
))
1961 if (!validate_upd_sa(tb_sa
))
1965 tx_sa
= get_txsa_from_nl(genl_info_net(info
), attrs
, tb_sa
,
1966 &dev
, &secy
, &tx_sc
, &assoc_num
);
1967 if (IS_ERR(tx_sa
)) {
1969 return PTR_ERR(tx_sa
);
1972 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
1973 spin_lock_bh(&tx_sa
->lock
);
1974 tx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
1975 spin_unlock_bh(&tx_sa
->lock
);
1978 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1979 tx_sa
->active
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1981 if (assoc_num
== tx_sc
->encoding_sa
)
1982 secy
->operational
= tx_sa
->active
;
1989 static int macsec_upd_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1991 struct nlattr
**attrs
= info
->attrs
;
1992 struct net_device
*dev
;
1993 struct macsec_secy
*secy
;
1994 struct macsec_rx_sc
*rx_sc
;
1995 struct macsec_rx_sa
*rx_sa
;
1997 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1998 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
2000 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2003 if (parse_rxsc_config(attrs
, tb_rxsc
))
2006 if (parse_sa_config(attrs
, tb_sa
))
2009 if (!validate_upd_sa(tb_sa
))
2013 rx_sa
= get_rxsa_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, tb_sa
,
2014 &dev
, &secy
, &rx_sc
, &assoc_num
);
2015 if (IS_ERR(rx_sa
)) {
2017 return PTR_ERR(rx_sa
);
2020 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
2021 spin_lock_bh(&rx_sa
->lock
);
2022 rx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
2023 spin_unlock_bh(&rx_sa
->lock
);
2026 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
2027 rx_sa
->active
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
2033 static int macsec_upd_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
2035 struct nlattr
**attrs
= info
->attrs
;
2036 struct net_device
*dev
;
2037 struct macsec_secy
*secy
;
2038 struct macsec_rx_sc
*rx_sc
;
2039 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
2041 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2044 if (parse_rxsc_config(attrs
, tb_rxsc
))
2047 if (!validate_add_rxsc(tb_rxsc
))
2051 rx_sc
= get_rxsc_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, &dev
, &secy
);
2052 if (IS_ERR(rx_sc
)) {
2054 return PTR_ERR(rx_sc
);
2057 if (tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]) {
2058 bool new = !!nla_get_u8(tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]);
2060 if (rx_sc
->active
!= new)
2061 secy
->n_rx_sc
+= new ? 1 : -1;
2063 rx_sc
->active
= new;
2071 static int copy_tx_sa_stats(struct sk_buff
*skb
,
2072 struct macsec_tx_sa_stats __percpu
*pstats
)
2074 struct macsec_tx_sa_stats sum
= {0, };
2077 for_each_possible_cpu(cpu
) {
2078 const struct macsec_tx_sa_stats
*stats
= per_cpu_ptr(pstats
, cpu
);
2080 sum
.OutPktsProtected
+= stats
->OutPktsProtected
;
2081 sum
.OutPktsEncrypted
+= stats
->OutPktsEncrypted
;
2084 if (nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED
, sum
.OutPktsProtected
) ||
2085 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED
, sum
.OutPktsEncrypted
))
2091 static int copy_rx_sa_stats(struct sk_buff
*skb
,
2092 struct macsec_rx_sa_stats __percpu
*pstats
)
2094 struct macsec_rx_sa_stats sum
= {0, };
2097 for_each_possible_cpu(cpu
) {
2098 const struct macsec_rx_sa_stats
*stats
= per_cpu_ptr(pstats
, cpu
);
2100 sum
.InPktsOK
+= stats
->InPktsOK
;
2101 sum
.InPktsInvalid
+= stats
->InPktsInvalid
;
2102 sum
.InPktsNotValid
+= stats
->InPktsNotValid
;
2103 sum
.InPktsNotUsingSA
+= stats
->InPktsNotUsingSA
;
2104 sum
.InPktsUnusedSA
+= stats
->InPktsUnusedSA
;
2107 if (nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_OK
, sum
.InPktsOK
) ||
2108 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID
, sum
.InPktsInvalid
) ||
2109 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID
, sum
.InPktsNotValid
) ||
2110 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA
, sum
.InPktsNotUsingSA
) ||
2111 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA
, sum
.InPktsUnusedSA
))
2117 static int copy_rx_sc_stats(struct sk_buff
*skb
,
2118 struct pcpu_rx_sc_stats __percpu
*pstats
)
2120 struct macsec_rx_sc_stats sum
= {0, };
2123 for_each_possible_cpu(cpu
) {
2124 const struct pcpu_rx_sc_stats
*stats
;
2125 struct macsec_rx_sc_stats tmp
;
2128 stats
= per_cpu_ptr(pstats
, cpu
);
2130 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2131 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2132 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2134 sum
.InOctetsValidated
+= tmp
.InOctetsValidated
;
2135 sum
.InOctetsDecrypted
+= tmp
.InOctetsDecrypted
;
2136 sum
.InPktsUnchecked
+= tmp
.InPktsUnchecked
;
2137 sum
.InPktsDelayed
+= tmp
.InPktsDelayed
;
2138 sum
.InPktsOK
+= tmp
.InPktsOK
;
2139 sum
.InPktsInvalid
+= tmp
.InPktsInvalid
;
2140 sum
.InPktsLate
+= tmp
.InPktsLate
;
2141 sum
.InPktsNotValid
+= tmp
.InPktsNotValid
;
2142 sum
.InPktsNotUsingSA
+= tmp
.InPktsNotUsingSA
;
2143 sum
.InPktsUnusedSA
+= tmp
.InPktsUnusedSA
;
2146 if (nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED
, sum
.InOctetsValidated
) ||
2147 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED
, sum
.InOctetsDecrypted
) ||
2148 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED
, sum
.InPktsUnchecked
) ||
2149 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED
, sum
.InPktsDelayed
) ||
2150 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK
, sum
.InPktsOK
) ||
2151 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID
, sum
.InPktsInvalid
) ||
2152 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE
, sum
.InPktsLate
) ||
2153 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID
, sum
.InPktsNotValid
) ||
2154 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA
, sum
.InPktsNotUsingSA
) ||
2155 nla_put_u64(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA
, sum
.InPktsUnusedSA
))
2161 static int copy_tx_sc_stats(struct sk_buff
*skb
,
2162 struct pcpu_tx_sc_stats __percpu
*pstats
)
2164 struct macsec_tx_sc_stats sum
= {0, };
2167 for_each_possible_cpu(cpu
) {
2168 const struct pcpu_tx_sc_stats
*stats
;
2169 struct macsec_tx_sc_stats tmp
;
2172 stats
= per_cpu_ptr(pstats
, cpu
);
2174 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2175 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2176 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2178 sum
.OutPktsProtected
+= tmp
.OutPktsProtected
;
2179 sum
.OutPktsEncrypted
+= tmp
.OutPktsEncrypted
;
2180 sum
.OutOctetsProtected
+= tmp
.OutOctetsProtected
;
2181 sum
.OutOctetsEncrypted
+= tmp
.OutOctetsEncrypted
;
2184 if (nla_put_u64(skb
, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED
, sum
.OutPktsProtected
) ||
2185 nla_put_u64(skb
, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED
, sum
.OutPktsEncrypted
) ||
2186 nla_put_u64(skb
, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED
, sum
.OutOctetsProtected
) ||
2187 nla_put_u64(skb
, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED
, sum
.OutOctetsEncrypted
))
2193 static int copy_secy_stats(struct sk_buff
*skb
,
2194 struct pcpu_secy_stats __percpu
*pstats
)
2196 struct macsec_dev_stats sum
= {0, };
2199 for_each_possible_cpu(cpu
) {
2200 const struct pcpu_secy_stats
*stats
;
2201 struct macsec_dev_stats tmp
;
2204 stats
= per_cpu_ptr(pstats
, cpu
);
2206 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2207 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2208 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2210 sum
.OutPktsUntagged
+= tmp
.OutPktsUntagged
;
2211 sum
.InPktsUntagged
+= tmp
.InPktsUntagged
;
2212 sum
.OutPktsTooLong
+= tmp
.OutPktsTooLong
;
2213 sum
.InPktsNoTag
+= tmp
.InPktsNoTag
;
2214 sum
.InPktsBadTag
+= tmp
.InPktsBadTag
;
2215 sum
.InPktsUnknownSCI
+= tmp
.InPktsUnknownSCI
;
2216 sum
.InPktsNoSCI
+= tmp
.InPktsNoSCI
;
2217 sum
.InPktsOverrun
+= tmp
.InPktsOverrun
;
2220 if (nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED
, sum
.OutPktsUntagged
) ||
2221 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED
, sum
.InPktsUntagged
) ||
2222 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG
, sum
.OutPktsTooLong
) ||
2223 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG
, sum
.InPktsNoTag
) ||
2224 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG
, sum
.InPktsBadTag
) ||
2225 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI
, sum
.InPktsUnknownSCI
) ||
2226 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI
, sum
.InPktsNoSCI
) ||
2227 nla_put_u64(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN
, sum
.InPktsOverrun
))
2233 static int nla_put_secy(struct macsec_secy
*secy
, struct sk_buff
*skb
)
2235 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
2236 struct nlattr
*secy_nest
= nla_nest_start(skb
, MACSEC_ATTR_SECY
);
2241 if (nla_put_sci(skb
, MACSEC_SECY_ATTR_SCI
, secy
->sci
) ||
2242 nla_put_u64(skb
, MACSEC_SECY_ATTR_CIPHER_SUITE
,
2243 MACSEC_DEFAULT_CIPHER_ID
) ||
2244 nla_put_u8(skb
, MACSEC_SECY_ATTR_ICV_LEN
, secy
->icv_len
) ||
2245 nla_put_u8(skb
, MACSEC_SECY_ATTR_OPER
, secy
->operational
) ||
2246 nla_put_u8(skb
, MACSEC_SECY_ATTR_PROTECT
, secy
->protect_frames
) ||
2247 nla_put_u8(skb
, MACSEC_SECY_ATTR_REPLAY
, secy
->replay_protect
) ||
2248 nla_put_u8(skb
, MACSEC_SECY_ATTR_VALIDATE
, secy
->validate_frames
) ||
2249 nla_put_u8(skb
, MACSEC_SECY_ATTR_ENCRYPT
, tx_sc
->encrypt
) ||
2250 nla_put_u8(skb
, MACSEC_SECY_ATTR_INC_SCI
, tx_sc
->send_sci
) ||
2251 nla_put_u8(skb
, MACSEC_SECY_ATTR_ES
, tx_sc
->end_station
) ||
2252 nla_put_u8(skb
, MACSEC_SECY_ATTR_SCB
, tx_sc
->scb
) ||
2253 nla_put_u8(skb
, MACSEC_SECY_ATTR_ENCODING_SA
, tx_sc
->encoding_sa
))
2256 if (secy
->replay_protect
) {
2257 if (nla_put_u32(skb
, MACSEC_SECY_ATTR_WINDOW
, secy
->replay_window
))
2261 nla_nest_end(skb
, secy_nest
);
2265 nla_nest_cancel(skb
, secy_nest
);
2269 static int dump_secy(struct macsec_secy
*secy
, struct net_device
*dev
,
2270 struct sk_buff
*skb
, struct netlink_callback
*cb
)
2272 struct macsec_rx_sc
*rx_sc
;
2273 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
2274 struct nlattr
*txsa_list
, *rxsc_list
;
2277 struct nlattr
*attr
;
2279 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
2280 &macsec_fam
, NLM_F_MULTI
, MACSEC_CMD_GET_TXSC
);
2284 genl_dump_check_consistent(cb
, hdr
, &macsec_fam
);
2286 if (nla_put_u32(skb
, MACSEC_ATTR_IFINDEX
, dev
->ifindex
))
2287 goto nla_put_failure
;
2289 if (nla_put_secy(secy
, skb
))
2290 goto nla_put_failure
;
2292 attr
= nla_nest_start(skb
, MACSEC_ATTR_TXSC_STATS
);
2294 goto nla_put_failure
;
2295 if (copy_tx_sc_stats(skb
, tx_sc
->stats
)) {
2296 nla_nest_cancel(skb
, attr
);
2297 goto nla_put_failure
;
2299 nla_nest_end(skb
, attr
);
2301 attr
= nla_nest_start(skb
, MACSEC_ATTR_SECY_STATS
);
2303 goto nla_put_failure
;
2304 if (copy_secy_stats(skb
, macsec_priv(dev
)->stats
)) {
2305 nla_nest_cancel(skb
, attr
);
2306 goto nla_put_failure
;
2308 nla_nest_end(skb
, attr
);
2310 txsa_list
= nla_nest_start(skb
, MACSEC_ATTR_TXSA_LIST
);
2312 goto nla_put_failure
;
2313 for (i
= 0, j
= 1; i
< MACSEC_NUM_AN
; i
++) {
2314 struct macsec_tx_sa
*tx_sa
= rtnl_dereference(tx_sc
->sa
[i
]);
2315 struct nlattr
*txsa_nest
;
2320 txsa_nest
= nla_nest_start(skb
, j
++);
2322 nla_nest_cancel(skb
, txsa_list
);
2323 goto nla_put_failure
;
2326 if (nla_put_u8(skb
, MACSEC_SA_ATTR_AN
, i
) ||
2327 nla_put_u32(skb
, MACSEC_SA_ATTR_PN
, tx_sa
->next_pn
) ||
2328 nla_put(skb
, MACSEC_SA_ATTR_KEYID
, MACSEC_KEYID_LEN
, tx_sa
->key
.id
) ||
2329 nla_put_u8(skb
, MACSEC_SA_ATTR_ACTIVE
, tx_sa
->active
)) {
2330 nla_nest_cancel(skb
, txsa_nest
);
2331 nla_nest_cancel(skb
, txsa_list
);
2332 goto nla_put_failure
;
2335 attr
= nla_nest_start(skb
, MACSEC_SA_ATTR_STATS
);
2337 nla_nest_cancel(skb
, txsa_nest
);
2338 nla_nest_cancel(skb
, txsa_list
);
2339 goto nla_put_failure
;
2341 if (copy_tx_sa_stats(skb
, tx_sa
->stats
)) {
2342 nla_nest_cancel(skb
, attr
);
2343 nla_nest_cancel(skb
, txsa_nest
);
2344 nla_nest_cancel(skb
, txsa_list
);
2345 goto nla_put_failure
;
2347 nla_nest_end(skb
, attr
);
2349 nla_nest_end(skb
, txsa_nest
);
2351 nla_nest_end(skb
, txsa_list
);
2353 rxsc_list
= nla_nest_start(skb
, MACSEC_ATTR_RXSC_LIST
);
2355 goto nla_put_failure
;
2358 for_each_rxsc_rtnl(secy
, rx_sc
) {
2360 struct nlattr
*rxsa_list
;
2361 struct nlattr
*rxsc_nest
= nla_nest_start(skb
, j
++);
2364 nla_nest_cancel(skb
, rxsc_list
);
2365 goto nla_put_failure
;
2368 if (nla_put_u8(skb
, MACSEC_RXSC_ATTR_ACTIVE
, rx_sc
->active
) ||
2369 nla_put_sci(skb
, MACSEC_RXSC_ATTR_SCI
, rx_sc
->sci
)) {
2370 nla_nest_cancel(skb
, rxsc_nest
);
2371 nla_nest_cancel(skb
, rxsc_list
);
2372 goto nla_put_failure
;
2375 attr
= nla_nest_start(skb
, MACSEC_RXSC_ATTR_STATS
);
2377 nla_nest_cancel(skb
, rxsc_nest
);
2378 nla_nest_cancel(skb
, rxsc_list
);
2379 goto nla_put_failure
;
2381 if (copy_rx_sc_stats(skb
, rx_sc
->stats
)) {
2382 nla_nest_cancel(skb
, attr
);
2383 nla_nest_cancel(skb
, rxsc_nest
);
2384 nla_nest_cancel(skb
, rxsc_list
);
2385 goto nla_put_failure
;
2387 nla_nest_end(skb
, attr
);
2389 rxsa_list
= nla_nest_start(skb
, MACSEC_RXSC_ATTR_SA_LIST
);
2391 nla_nest_cancel(skb
, rxsc_nest
);
2392 nla_nest_cancel(skb
, rxsc_list
);
2393 goto nla_put_failure
;
2396 for (i
= 0, k
= 1; i
< MACSEC_NUM_AN
; i
++) {
2397 struct macsec_rx_sa
*rx_sa
= rtnl_dereference(rx_sc
->sa
[i
]);
2398 struct nlattr
*rxsa_nest
;
2403 rxsa_nest
= nla_nest_start(skb
, k
++);
2405 nla_nest_cancel(skb
, rxsa_list
);
2406 nla_nest_cancel(skb
, rxsc_nest
);
2407 nla_nest_cancel(skb
, rxsc_list
);
2408 goto nla_put_failure
;
2411 attr
= nla_nest_start(skb
, MACSEC_SA_ATTR_STATS
);
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 if (copy_rx_sa_stats(skb
, rx_sa
->stats
)) {
2419 nla_nest_cancel(skb
, attr
);
2420 nla_nest_cancel(skb
, rxsa_list
);
2421 nla_nest_cancel(skb
, rxsc_nest
);
2422 nla_nest_cancel(skb
, rxsc_list
);
2423 goto nla_put_failure
;
2425 nla_nest_end(skb
, attr
);
2427 if (nla_put_u8(skb
, MACSEC_SA_ATTR_AN
, i
) ||
2428 nla_put_u32(skb
, MACSEC_SA_ATTR_PN
, rx_sa
->next_pn
) ||
2429 nla_put(skb
, MACSEC_SA_ATTR_KEYID
, MACSEC_KEYID_LEN
, rx_sa
->key
.id
) ||
2430 nla_put_u8(skb
, MACSEC_SA_ATTR_ACTIVE
, rx_sa
->active
)) {
2431 nla_nest_cancel(skb
, rxsa_nest
);
2432 nla_nest_cancel(skb
, rxsc_nest
);
2433 nla_nest_cancel(skb
, rxsc_list
);
2434 goto nla_put_failure
;
2436 nla_nest_end(skb
, rxsa_nest
);
2439 nla_nest_end(skb
, rxsa_list
);
2440 nla_nest_end(skb
, rxsc_nest
);
2443 nla_nest_end(skb
, rxsc_list
);
2445 genlmsg_end(skb
, hdr
);
2450 genlmsg_cancel(skb
, hdr
);
2454 static int macsec_generation
= 1; /* protected by RTNL */
2456 static int macsec_dump_txsc(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2458 struct net
*net
= sock_net(skb
->sk
);
2459 struct net_device
*dev
;
2462 dev_idx
= cb
->args
[0];
2467 cb
->seq
= macsec_generation
;
2469 for_each_netdev(net
, dev
) {
2470 struct macsec_secy
*secy
;
2475 if (!netif_is_macsec(dev
))
2478 secy
= &macsec_priv(dev
)->secy
;
2479 if (dump_secy(secy
, dev
, skb
, cb
) < 0)
2491 static const struct genl_ops macsec_genl_ops
[] = {
2493 .cmd
= MACSEC_CMD_GET_TXSC
,
2494 .dumpit
= macsec_dump_txsc
,
2495 .policy
= macsec_genl_policy
,
2498 .cmd
= MACSEC_CMD_ADD_RXSC
,
2499 .doit
= macsec_add_rxsc
,
2500 .policy
= macsec_genl_policy
,
2501 .flags
= GENL_ADMIN_PERM
,
2504 .cmd
= MACSEC_CMD_DEL_RXSC
,
2505 .doit
= macsec_del_rxsc
,
2506 .policy
= macsec_genl_policy
,
2507 .flags
= GENL_ADMIN_PERM
,
2510 .cmd
= MACSEC_CMD_UPD_RXSC
,
2511 .doit
= macsec_upd_rxsc
,
2512 .policy
= macsec_genl_policy
,
2513 .flags
= GENL_ADMIN_PERM
,
2516 .cmd
= MACSEC_CMD_ADD_TXSA
,
2517 .doit
= macsec_add_txsa
,
2518 .policy
= macsec_genl_policy
,
2519 .flags
= GENL_ADMIN_PERM
,
2522 .cmd
= MACSEC_CMD_DEL_TXSA
,
2523 .doit
= macsec_del_txsa
,
2524 .policy
= macsec_genl_policy
,
2525 .flags
= GENL_ADMIN_PERM
,
2528 .cmd
= MACSEC_CMD_UPD_TXSA
,
2529 .doit
= macsec_upd_txsa
,
2530 .policy
= macsec_genl_policy
,
2531 .flags
= GENL_ADMIN_PERM
,
2534 .cmd
= MACSEC_CMD_ADD_RXSA
,
2535 .doit
= macsec_add_rxsa
,
2536 .policy
= macsec_genl_policy
,
2537 .flags
= GENL_ADMIN_PERM
,
2540 .cmd
= MACSEC_CMD_DEL_RXSA
,
2541 .doit
= macsec_del_rxsa
,
2542 .policy
= macsec_genl_policy
,
2543 .flags
= GENL_ADMIN_PERM
,
2546 .cmd
= MACSEC_CMD_UPD_RXSA
,
2547 .doit
= macsec_upd_rxsa
,
2548 .policy
= macsec_genl_policy
,
2549 .flags
= GENL_ADMIN_PERM
,
2553 static netdev_tx_t
macsec_start_xmit(struct sk_buff
*skb
,
2554 struct net_device
*dev
)
2556 struct macsec_dev
*macsec
= netdev_priv(dev
);
2557 struct macsec_secy
*secy
= &macsec
->secy
;
2558 struct pcpu_secy_stats
*secy_stats
;
2562 if (!secy
->protect_frames
) {
2563 secy_stats
= this_cpu_ptr(macsec
->stats
);
2564 u64_stats_update_begin(&secy_stats
->syncp
);
2565 secy_stats
->stats
.OutPktsUntagged
++;
2566 u64_stats_update_end(&secy_stats
->syncp
);
2568 ret
= dev_queue_xmit(skb
);
2569 count_tx(dev
, ret
, len
);
2573 if (!secy
->operational
) {
2575 dev
->stats
.tx_dropped
++;
2576 return NETDEV_TX_OK
;
2579 skb
= macsec_encrypt(skb
, dev
);
2581 if (PTR_ERR(skb
) != -EINPROGRESS
)
2582 dev
->stats
.tx_dropped
++;
2583 return NETDEV_TX_OK
;
2586 macsec_count_tx(skb
, &macsec
->secy
.tx_sc
, macsec_skb_cb(skb
)->tx_sa
);
2588 macsec_encrypt_finish(skb
, dev
);
2590 ret
= dev_queue_xmit(skb
);
2591 count_tx(dev
, ret
, len
);
2595 #define MACSEC_FEATURES \
2596 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2597 static int macsec_dev_init(struct net_device
*dev
)
2599 struct macsec_dev
*macsec
= macsec_priv(dev
);
2600 struct net_device
*real_dev
= macsec
->real_dev
;
2602 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
2606 dev
->features
= real_dev
->features
& MACSEC_FEATURES
;
2607 dev
->features
|= NETIF_F_LLTX
| NETIF_F_GSO_SOFTWARE
;
2609 dev
->needed_headroom
= real_dev
->needed_headroom
+
2610 MACSEC_NEEDED_HEADROOM
;
2611 dev
->needed_tailroom
= real_dev
->needed_tailroom
+
2612 MACSEC_NEEDED_TAILROOM
;
2614 if (is_zero_ether_addr(dev
->dev_addr
))
2615 eth_hw_addr_inherit(dev
, real_dev
);
2616 if (is_zero_ether_addr(dev
->broadcast
))
2617 memcpy(dev
->broadcast
, real_dev
->broadcast
, dev
->addr_len
);
2622 static void macsec_dev_uninit(struct net_device
*dev
)
2624 free_percpu(dev
->tstats
);
2627 static netdev_features_t
macsec_fix_features(struct net_device
*dev
,
2628 netdev_features_t features
)
2630 struct macsec_dev
*macsec
= macsec_priv(dev
);
2631 struct net_device
*real_dev
= macsec
->real_dev
;
2633 features
&= real_dev
->features
& MACSEC_FEATURES
;
2634 features
|= NETIF_F_LLTX
| NETIF_F_GSO_SOFTWARE
;
2639 static int macsec_dev_open(struct net_device
*dev
)
2641 struct macsec_dev
*macsec
= macsec_priv(dev
);
2642 struct net_device
*real_dev
= macsec
->real_dev
;
2645 if (!(real_dev
->flags
& IFF_UP
))
2648 err
= dev_uc_add(real_dev
, dev
->dev_addr
);
2652 if (dev
->flags
& IFF_ALLMULTI
) {
2653 err
= dev_set_allmulti(real_dev
, 1);
2658 if (dev
->flags
& IFF_PROMISC
) {
2659 err
= dev_set_promiscuity(real_dev
, 1);
2661 goto clear_allmulti
;
2664 if (netif_carrier_ok(real_dev
))
2665 netif_carrier_on(dev
);
2669 if (dev
->flags
& IFF_ALLMULTI
)
2670 dev_set_allmulti(real_dev
, -1);
2672 dev_uc_del(real_dev
, dev
->dev_addr
);
2673 netif_carrier_off(dev
);
2677 static int macsec_dev_stop(struct net_device
*dev
)
2679 struct macsec_dev
*macsec
= macsec_priv(dev
);
2680 struct net_device
*real_dev
= macsec
->real_dev
;
2682 netif_carrier_off(dev
);
2684 dev_mc_unsync(real_dev
, dev
);
2685 dev_uc_unsync(real_dev
, dev
);
2687 if (dev
->flags
& IFF_ALLMULTI
)
2688 dev_set_allmulti(real_dev
, -1);
2690 if (dev
->flags
& IFF_PROMISC
)
2691 dev_set_promiscuity(real_dev
, -1);
2693 dev_uc_del(real_dev
, dev
->dev_addr
);
2698 static void macsec_dev_change_rx_flags(struct net_device
*dev
, int change
)
2700 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
2702 if (!(dev
->flags
& IFF_UP
))
2705 if (change
& IFF_ALLMULTI
)
2706 dev_set_allmulti(real_dev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
2708 if (change
& IFF_PROMISC
)
2709 dev_set_promiscuity(real_dev
,
2710 dev
->flags
& IFF_PROMISC
? 1 : -1);
2713 static void macsec_dev_set_rx_mode(struct net_device
*dev
)
2715 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
2717 dev_mc_sync(real_dev
, dev
);
2718 dev_uc_sync(real_dev
, dev
);
2721 static int macsec_set_mac_address(struct net_device
*dev
, void *p
)
2723 struct macsec_dev
*macsec
= macsec_priv(dev
);
2724 struct net_device
*real_dev
= macsec
->real_dev
;
2725 struct sockaddr
*addr
= p
;
2728 if (!is_valid_ether_addr(addr
->sa_data
))
2729 return -EADDRNOTAVAIL
;
2731 if (!(dev
->flags
& IFF_UP
))
2734 err
= dev_uc_add(real_dev
, addr
->sa_data
);
2738 dev_uc_del(real_dev
, dev
->dev_addr
);
2741 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
2745 static int macsec_change_mtu(struct net_device
*dev
, int new_mtu
)
2747 struct macsec_dev
*macsec
= macsec_priv(dev
);
2748 unsigned int extra
= macsec
->secy
.icv_len
+ macsec_extra_len(true);
2750 if (macsec
->real_dev
->mtu
- extra
< new_mtu
)
2758 static struct rtnl_link_stats64
*macsec_get_stats64(struct net_device
*dev
,
2759 struct rtnl_link_stats64
*s
)
2766 for_each_possible_cpu(cpu
) {
2767 struct pcpu_sw_netstats
*stats
;
2768 struct pcpu_sw_netstats tmp
;
2771 stats
= per_cpu_ptr(dev
->tstats
, cpu
);
2773 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2774 tmp
.rx_packets
= stats
->rx_packets
;
2775 tmp
.rx_bytes
= stats
->rx_bytes
;
2776 tmp
.tx_packets
= stats
->tx_packets
;
2777 tmp
.tx_bytes
= stats
->tx_bytes
;
2778 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2780 s
->rx_packets
+= tmp
.rx_packets
;
2781 s
->rx_bytes
+= tmp
.rx_bytes
;
2782 s
->tx_packets
+= tmp
.tx_packets
;
2783 s
->tx_bytes
+= tmp
.tx_bytes
;
2786 s
->rx_dropped
= dev
->stats
.rx_dropped
;
2787 s
->tx_dropped
= dev
->stats
.tx_dropped
;
2792 static int macsec_get_iflink(const struct net_device
*dev
)
2794 return macsec_priv(dev
)->real_dev
->ifindex
;
2797 static const struct net_device_ops macsec_netdev_ops
= {
2798 .ndo_init
= macsec_dev_init
,
2799 .ndo_uninit
= macsec_dev_uninit
,
2800 .ndo_open
= macsec_dev_open
,
2801 .ndo_stop
= macsec_dev_stop
,
2802 .ndo_fix_features
= macsec_fix_features
,
2803 .ndo_change_mtu
= macsec_change_mtu
,
2804 .ndo_set_rx_mode
= macsec_dev_set_rx_mode
,
2805 .ndo_change_rx_flags
= macsec_dev_change_rx_flags
,
2806 .ndo_set_mac_address
= macsec_set_mac_address
,
2807 .ndo_start_xmit
= macsec_start_xmit
,
2808 .ndo_get_stats64
= macsec_get_stats64
,
2809 .ndo_get_iflink
= macsec_get_iflink
,
2812 static const struct device_type macsec_type
= {
2816 static const struct nla_policy macsec_rtnl_policy
[IFLA_MACSEC_MAX
+ 1] = {
2817 [IFLA_MACSEC_SCI
] = { .type
= NLA_U64
},
2818 [IFLA_MACSEC_ICV_LEN
] = { .type
= NLA_U8
},
2819 [IFLA_MACSEC_CIPHER_SUITE
] = { .type
= NLA_U64
},
2820 [IFLA_MACSEC_WINDOW
] = { .type
= NLA_U32
},
2821 [IFLA_MACSEC_ENCODING_SA
] = { .type
= NLA_U8
},
2822 [IFLA_MACSEC_ENCRYPT
] = { .type
= NLA_U8
},
2823 [IFLA_MACSEC_PROTECT
] = { .type
= NLA_U8
},
2824 [IFLA_MACSEC_INC_SCI
] = { .type
= NLA_U8
},
2825 [IFLA_MACSEC_ES
] = { .type
= NLA_U8
},
2826 [IFLA_MACSEC_SCB
] = { .type
= NLA_U8
},
2827 [IFLA_MACSEC_REPLAY_PROTECT
] = { .type
= NLA_U8
},
2828 [IFLA_MACSEC_VALIDATION
] = { .type
= NLA_U8
},
2831 static void macsec_free_netdev(struct net_device
*dev
)
2833 struct macsec_dev
*macsec
= macsec_priv(dev
);
2834 struct net_device
*real_dev
= macsec
->real_dev
;
2836 free_percpu(macsec
->stats
);
2837 free_percpu(macsec
->secy
.tx_sc
.stats
);
2843 static void macsec_setup(struct net_device
*dev
)
2846 dev
->tx_queue_len
= 0;
2847 dev
->netdev_ops
= &macsec_netdev_ops
;
2848 dev
->destructor
= macsec_free_netdev
;
2850 eth_zero_addr(dev
->broadcast
);
2853 static void macsec_changelink_common(struct net_device
*dev
,
2854 struct nlattr
*data
[])
2856 struct macsec_secy
*secy
;
2857 struct macsec_tx_sc
*tx_sc
;
2859 secy
= &macsec_priv(dev
)->secy
;
2860 tx_sc
= &secy
->tx_sc
;
2862 if (data
[IFLA_MACSEC_ENCODING_SA
]) {
2863 struct macsec_tx_sa
*tx_sa
;
2865 tx_sc
->encoding_sa
= nla_get_u8(data
[IFLA_MACSEC_ENCODING_SA
]);
2866 tx_sa
= rtnl_dereference(tx_sc
->sa
[tx_sc
->encoding_sa
]);
2868 secy
->operational
= tx_sa
&& tx_sa
->active
;
2871 if (data
[IFLA_MACSEC_WINDOW
])
2872 secy
->replay_window
= nla_get_u32(data
[IFLA_MACSEC_WINDOW
]);
2874 if (data
[IFLA_MACSEC_ENCRYPT
])
2875 tx_sc
->encrypt
= !!nla_get_u8(data
[IFLA_MACSEC_ENCRYPT
]);
2877 if (data
[IFLA_MACSEC_PROTECT
])
2878 secy
->protect_frames
= !!nla_get_u8(data
[IFLA_MACSEC_PROTECT
]);
2880 if (data
[IFLA_MACSEC_INC_SCI
])
2881 tx_sc
->send_sci
= !!nla_get_u8(data
[IFLA_MACSEC_INC_SCI
]);
2883 if (data
[IFLA_MACSEC_ES
])
2884 tx_sc
->end_station
= !!nla_get_u8(data
[IFLA_MACSEC_ES
]);
2886 if (data
[IFLA_MACSEC_SCB
])
2887 tx_sc
->scb
= !!nla_get_u8(data
[IFLA_MACSEC_SCB
]);
2889 if (data
[IFLA_MACSEC_REPLAY_PROTECT
])
2890 secy
->replay_protect
= !!nla_get_u8(data
[IFLA_MACSEC_REPLAY_PROTECT
]);
2892 if (data
[IFLA_MACSEC_VALIDATION
])
2893 secy
->validate_frames
= nla_get_u8(data
[IFLA_MACSEC_VALIDATION
]);
2896 static int macsec_changelink(struct net_device
*dev
, struct nlattr
*tb
[],
2897 struct nlattr
*data
[])
2902 if (data
[IFLA_MACSEC_CIPHER_SUITE
] ||
2903 data
[IFLA_MACSEC_ICV_LEN
] ||
2904 data
[IFLA_MACSEC_SCI
] ||
2905 data
[IFLA_MACSEC_PORT
])
2908 macsec_changelink_common(dev
, data
);
2913 static void macsec_del_dev(struct macsec_dev
*macsec
)
2917 while (macsec
->secy
.rx_sc
) {
2918 struct macsec_rx_sc
*rx_sc
= rtnl_dereference(macsec
->secy
.rx_sc
);
2920 rcu_assign_pointer(macsec
->secy
.rx_sc
, rx_sc
->next
);
2924 for (i
= 0; i
< MACSEC_NUM_AN
; i
++) {
2925 struct macsec_tx_sa
*sa
= rtnl_dereference(macsec
->secy
.tx_sc
.sa
[i
]);
2928 RCU_INIT_POINTER(macsec
->secy
.tx_sc
.sa
[i
], NULL
);
2934 static void macsec_dellink(struct net_device
*dev
, struct list_head
*head
)
2936 struct macsec_dev
*macsec
= macsec_priv(dev
);
2937 struct net_device
*real_dev
= macsec
->real_dev
;
2938 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
2940 macsec_generation
++;
2942 unregister_netdevice_queue(dev
, head
);
2943 list_del_rcu(&macsec
->secys
);
2944 if (list_empty(&rxd
->secys
)) {
2945 netdev_rx_handler_unregister(real_dev
);
2949 macsec_del_dev(macsec
);
2952 static int register_macsec_dev(struct net_device
*real_dev
,
2953 struct net_device
*dev
)
2955 struct macsec_dev
*macsec
= macsec_priv(dev
);
2956 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
2961 rxd
= kmalloc(sizeof(*rxd
), GFP_KERNEL
);
2965 INIT_LIST_HEAD(&rxd
->secys
);
2967 err
= netdev_rx_handler_register(real_dev
, macsec_handle_frame
,
2975 list_add_tail_rcu(&macsec
->secys
, &rxd
->secys
);
2979 static bool sci_exists(struct net_device
*dev
, sci_t sci
)
2981 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(dev
);
2982 struct macsec_dev
*macsec
;
2984 list_for_each_entry(macsec
, &rxd
->secys
, secys
) {
2985 if (macsec
->secy
.sci
== sci
)
2992 static sci_t
dev_to_sci(struct net_device
*dev
, __be16 port
)
2994 return make_sci(dev
->dev_addr
, port
);
2997 static int macsec_add_dev(struct net_device
*dev
, sci_t sci
, u8 icv_len
)
2999 struct macsec_dev
*macsec
= macsec_priv(dev
);
3000 struct macsec_secy
*secy
= &macsec
->secy
;
3002 macsec
->stats
= netdev_alloc_pcpu_stats(struct pcpu_secy_stats
);
3006 secy
->tx_sc
.stats
= netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats
);
3007 if (!secy
->tx_sc
.stats
) {
3008 free_percpu(macsec
->stats
);
3012 if (sci
== MACSEC_UNDEF_SCI
)
3013 sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
3016 secy
->operational
= true;
3017 secy
->key_len
= DEFAULT_SAK_LEN
;
3018 secy
->icv_len
= icv_len
;
3019 secy
->validate_frames
= MACSEC_VALIDATE_DEFAULT
;
3020 secy
->protect_frames
= true;
3021 secy
->replay_protect
= false;
3024 secy
->tx_sc
.active
= true;
3025 secy
->tx_sc
.encoding_sa
= DEFAULT_ENCODING_SA
;
3026 secy
->tx_sc
.encrypt
= DEFAULT_ENCRYPT
;
3027 secy
->tx_sc
.send_sci
= DEFAULT_SEND_SCI
;
3028 secy
->tx_sc
.end_station
= false;
3029 secy
->tx_sc
.scb
= false;
3034 static int macsec_newlink(struct net
*net
, struct net_device
*dev
,
3035 struct nlattr
*tb
[], struct nlattr
*data
[])
3037 struct macsec_dev
*macsec
= macsec_priv(dev
);
3038 struct net_device
*real_dev
;
3041 u8 icv_len
= DEFAULT_ICV_LEN
;
3042 rx_handler_func_t
*rx_handler
;
3046 real_dev
= __dev_get_by_index(net
, nla_get_u32(tb
[IFLA_LINK
]));
3050 dev
->priv_flags
|= IFF_MACSEC
;
3052 macsec
->real_dev
= real_dev
;
3054 if (data
&& data
[IFLA_MACSEC_ICV_LEN
])
3055 icv_len
= nla_get_u8(data
[IFLA_MACSEC_ICV_LEN
]);
3056 dev
->mtu
= real_dev
->mtu
- icv_len
- macsec_extra_len(true);
3058 rx_handler
= rtnl_dereference(real_dev
->rx_handler
);
3059 if (rx_handler
&& rx_handler
!= macsec_handle_frame
)
3062 err
= register_netdevice(dev
);
3066 /* need to be already registered so that ->init has run and
3067 * the MAC addr is set
3069 if (data
&& data
[IFLA_MACSEC_SCI
])
3070 sci
= nla_get_sci(data
[IFLA_MACSEC_SCI
]);
3071 else if (data
&& data
[IFLA_MACSEC_PORT
])
3072 sci
= dev_to_sci(dev
, nla_get_be16(data
[IFLA_MACSEC_PORT
]));
3074 sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
3076 if (rx_handler
&& sci_exists(real_dev
, sci
)) {
3081 err
= macsec_add_dev(dev
, sci
, icv_len
);
3086 macsec_changelink_common(dev
, data
);
3088 err
= register_macsec_dev(real_dev
, dev
);
3092 macsec_generation
++;
3099 macsec_del_dev(macsec
);
3101 unregister_netdevice(dev
);
3105 static int macsec_validate_attr(struct nlattr
*tb
[], struct nlattr
*data
[])
3107 u64 csid
= MACSEC_DEFAULT_CIPHER_ID
;
3108 u8 icv_len
= DEFAULT_ICV_LEN
;
3115 if (data
[IFLA_MACSEC_CIPHER_SUITE
])
3116 csid
= nla_get_u64(data
[IFLA_MACSEC_CIPHER_SUITE
]);
3118 if (data
[IFLA_MACSEC_ICV_LEN
])
3119 icv_len
= nla_get_u8(data
[IFLA_MACSEC_ICV_LEN
]);
3122 case MACSEC_DEFAULT_CIPHER_ID
:
3123 case MACSEC_DEFAULT_CIPHER_ALT
:
3124 if (icv_len
< MACSEC_MIN_ICV_LEN
||
3125 icv_len
> MACSEC_MAX_ICV_LEN
)
3132 if (data
[IFLA_MACSEC_ENCODING_SA
]) {
3133 if (nla_get_u8(data
[IFLA_MACSEC_ENCODING_SA
]) >= MACSEC_NUM_AN
)
3137 for (flag
= IFLA_MACSEC_ENCODING_SA
+ 1;
3138 flag
< IFLA_MACSEC_VALIDATION
;
3141 if (nla_get_u8(data
[flag
]) > 1)
3146 es
= data
[IFLA_MACSEC_ES
] ? nla_get_u8(data
[IFLA_MACSEC_ES
]) : false;
3147 sci
= data
[IFLA_MACSEC_INC_SCI
] ? nla_get_u8(data
[IFLA_MACSEC_INC_SCI
]) : false;
3148 scb
= data
[IFLA_MACSEC_SCB
] ? nla_get_u8(data
[IFLA_MACSEC_SCB
]) : false;
3150 if ((sci
&& (scb
|| es
)) || (scb
&& es
))
3153 if (data
[IFLA_MACSEC_VALIDATION
] &&
3154 nla_get_u8(data
[IFLA_MACSEC_VALIDATION
]) > MACSEC_VALIDATE_MAX
)
3157 if ((data
[IFLA_MACSEC_REPLAY_PROTECT
] &&
3158 nla_get_u8(data
[IFLA_MACSEC_REPLAY_PROTECT
])) &&
3159 !data
[IFLA_MACSEC_WINDOW
])
3165 static struct net
*macsec_get_link_net(const struct net_device
*dev
)
3167 return dev_net(macsec_priv(dev
)->real_dev
);
3170 static size_t macsec_get_size(const struct net_device
*dev
)
3173 nla_total_size(8) + /* SCI */
3174 nla_total_size(1) + /* ICV_LEN */
3175 nla_total_size(8) + /* CIPHER_SUITE */
3176 nla_total_size(4) + /* WINDOW */
3177 nla_total_size(1) + /* ENCODING_SA */
3178 nla_total_size(1) + /* ENCRYPT */
3179 nla_total_size(1) + /* PROTECT */
3180 nla_total_size(1) + /* INC_SCI */
3181 nla_total_size(1) + /* ES */
3182 nla_total_size(1) + /* SCB */
3183 nla_total_size(1) + /* REPLAY_PROTECT */
3184 nla_total_size(1) + /* VALIDATION */
3188 static int macsec_fill_info(struct sk_buff
*skb
,
3189 const struct net_device
*dev
)
3191 struct macsec_secy
*secy
= &macsec_priv(dev
)->secy
;
3192 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
3194 if (nla_put_sci(skb
, IFLA_MACSEC_SCI
, secy
->sci
) ||
3195 nla_put_u8(skb
, IFLA_MACSEC_ICV_LEN
, secy
->icv_len
) ||
3196 nla_put_u64(skb
, IFLA_MACSEC_CIPHER_SUITE
,
3197 MACSEC_DEFAULT_CIPHER_ID
) ||
3198 nla_put_u8(skb
, IFLA_MACSEC_ENCODING_SA
, tx_sc
->encoding_sa
) ||
3199 nla_put_u8(skb
, IFLA_MACSEC_ENCRYPT
, tx_sc
->encrypt
) ||
3200 nla_put_u8(skb
, IFLA_MACSEC_PROTECT
, secy
->protect_frames
) ||
3201 nla_put_u8(skb
, IFLA_MACSEC_INC_SCI
, tx_sc
->send_sci
) ||
3202 nla_put_u8(skb
, IFLA_MACSEC_ES
, tx_sc
->end_station
) ||
3203 nla_put_u8(skb
, IFLA_MACSEC_SCB
, tx_sc
->scb
) ||
3204 nla_put_u8(skb
, IFLA_MACSEC_REPLAY_PROTECT
, secy
->replay_protect
) ||
3205 nla_put_u8(skb
, IFLA_MACSEC_VALIDATION
, secy
->validate_frames
) ||
3207 goto nla_put_failure
;
3209 if (secy
->replay_protect
) {
3210 if (nla_put_u32(skb
, IFLA_MACSEC_WINDOW
, secy
->replay_window
))
3211 goto nla_put_failure
;
3220 static struct rtnl_link_ops macsec_link_ops __read_mostly
= {
3222 .priv_size
= sizeof(struct macsec_dev
),
3223 .maxtype
= IFLA_MACSEC_MAX
,
3224 .policy
= macsec_rtnl_policy
,
3225 .setup
= macsec_setup
,
3226 .validate
= macsec_validate_attr
,
3227 .newlink
= macsec_newlink
,
3228 .changelink
= macsec_changelink
,
3229 .dellink
= macsec_dellink
,
3230 .get_size
= macsec_get_size
,
3231 .fill_info
= macsec_fill_info
,
3232 .get_link_net
= macsec_get_link_net
,
3235 static bool is_macsec_master(struct net_device
*dev
)
3237 return rcu_access_pointer(dev
->rx_handler
) == macsec_handle_frame
;
3240 static int macsec_notify(struct notifier_block
*this, unsigned long event
,
3243 struct net_device
*real_dev
= netdev_notifier_info_to_dev(ptr
);
3246 if (!is_macsec_master(real_dev
))
3250 case NETDEV_UNREGISTER
: {
3251 struct macsec_dev
*m
, *n
;
3252 struct macsec_rxh_data
*rxd
;
3254 rxd
= macsec_data_rtnl(real_dev
);
3255 list_for_each_entry_safe(m
, n
, &rxd
->secys
, secys
) {
3256 macsec_dellink(m
->secy
.netdev
, &head
);
3258 unregister_netdevice_many(&head
);
3261 case NETDEV_CHANGEMTU
: {
3262 struct macsec_dev
*m
;
3263 struct macsec_rxh_data
*rxd
;
3265 rxd
= macsec_data_rtnl(real_dev
);
3266 list_for_each_entry(m
, &rxd
->secys
, secys
) {
3267 struct net_device
*dev
= m
->secy
.netdev
;
3268 unsigned int mtu
= real_dev
->mtu
- (m
->secy
.icv_len
+
3269 macsec_extra_len(true));
3272 dev_set_mtu(dev
, mtu
);
3280 static struct notifier_block macsec_notifier
= {
3281 .notifier_call
= macsec_notify
,
3284 static int __init
macsec_init(void)
3288 pr_info("MACsec IEEE 802.1AE\n");
3289 err
= register_netdevice_notifier(&macsec_notifier
);
3293 err
= rtnl_link_register(&macsec_link_ops
);
3297 err
= genl_register_family_with_ops(&macsec_fam
, macsec_genl_ops
);
3304 rtnl_link_unregister(&macsec_link_ops
);
3306 unregister_netdevice_notifier(&macsec_notifier
);
3310 static void __exit
macsec_exit(void)
3312 genl_unregister_family(&macsec_fam
);
3313 rtnl_link_unregister(&macsec_link_ops
);
3314 unregister_netdevice_notifier(&macsec_notifier
);
3317 module_init(macsec_init
);
3318 module_exit(macsec_exit
);
3320 MODULE_ALIAS_RTNL_LINK("macsec");
3322 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3323 MODULE_LICENSE("GPL v2");