1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drivers/net/macsec.c - MACsec device
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
8 #include <linux/types.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/module.h>
12 #include <crypto/aead.h>
13 #include <linux/etherdevice.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/refcount.h>
16 #include <net/genetlink.h>
18 #include <net/gro_cells.h>
20 #include <uapi/linux/if_macsec.h>
22 typedef u64 __bitwise sci_t
;
24 #define MACSEC_SCI_LEN 8
26 /* SecTAG length = macsec_eth_header without the optional SCI */
27 #define MACSEC_TAG_LEN 6
29 struct macsec_eth_header
{
33 #if defined(__LITTLE_ENDIAN_BITFIELD)
36 #elif defined(__BIG_ENDIAN_BITFIELD)
40 #error "Please fix <asm/byteorder.h>"
43 u8 secure_channel_id
[8]; /* optional */
46 #define MACSEC_TCI_VERSION 0x80
47 #define MACSEC_TCI_ES 0x40 /* end station */
48 #define MACSEC_TCI_SC 0x20 /* SCI present */
49 #define MACSEC_TCI_SCB 0x10 /* epon */
50 #define MACSEC_TCI_E 0x08 /* encryption */
51 #define MACSEC_TCI_C 0x04 /* changed text */
52 #define MACSEC_AN_MASK 0x03 /* association number */
53 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
55 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
56 #define MIN_NON_SHORT_LEN 48
58 #define GCM_AES_IV_LEN 12
59 #define DEFAULT_ICV_LEN 16
61 #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
63 #define for_each_rxsc(secy, sc) \
64 for (sc = rcu_dereference_bh(secy->rx_sc); \
66 sc = rcu_dereference_bh(sc->next))
67 #define for_each_rxsc_rtnl(secy, sc) \
68 for (sc = rtnl_dereference(secy->rx_sc); \
70 sc = rtnl_dereference(sc->next))
74 u8 secure_channel_id
[8];
81 * struct macsec_key - SA key
82 * @id: user-provided key identifier
83 * @tfm: crypto struct, key storage
86 u8 id
[MACSEC_KEYID_LEN
];
87 struct crypto_aead
*tfm
;
90 struct macsec_rx_sc_stats
{
91 __u64 InOctetsValidated
;
92 __u64 InOctetsDecrypted
;
93 __u64 InPktsUnchecked
;
99 __u64 InPktsNotUsingSA
;
100 __u64 InPktsUnusedSA
;
103 struct macsec_rx_sa_stats
{
106 __u32 InPktsNotValid
;
107 __u32 InPktsNotUsingSA
;
108 __u32 InPktsUnusedSA
;
111 struct macsec_tx_sa_stats
{
112 __u32 OutPktsProtected
;
113 __u32 OutPktsEncrypted
;
116 struct macsec_tx_sc_stats
{
117 __u64 OutPktsProtected
;
118 __u64 OutPktsEncrypted
;
119 __u64 OutOctetsProtected
;
120 __u64 OutOctetsEncrypted
;
123 struct macsec_dev_stats
{
124 __u64 OutPktsUntagged
;
125 __u64 InPktsUntagged
;
126 __u64 OutPktsTooLong
;
129 __u64 InPktsUnknownSCI
;
135 * struct macsec_rx_sa - receive secure association
137 * @next_pn: packet number expected for the next packet
138 * @lock: protects next_pn manipulations
139 * @key: key structure
140 * @stats: per-SA stats
142 struct macsec_rx_sa
{
143 struct macsec_key key
;
148 struct macsec_rx_sa_stats __percpu
*stats
;
149 struct macsec_rx_sc
*sc
;
153 struct pcpu_rx_sc_stats
{
154 struct macsec_rx_sc_stats stats
;
155 struct u64_stats_sync syncp
;
159 * struct macsec_rx_sc - receive secure channel
160 * @sci: secure channel identifier for this SC
161 * @active: channel is active
162 * @sa: array of secure associations
163 * @stats: per-SC stats
165 struct macsec_rx_sc
{
166 struct macsec_rx_sc __rcu
*next
;
169 struct macsec_rx_sa __rcu
*sa
[MACSEC_NUM_AN
];
170 struct pcpu_rx_sc_stats __percpu
*stats
;
172 struct rcu_head rcu_head
;
176 * struct macsec_tx_sa - transmit secure association
178 * @next_pn: packet number to use for the next packet
179 * @lock: protects next_pn manipulations
180 * @key: key structure
181 * @stats: per-SA stats
183 struct macsec_tx_sa
{
184 struct macsec_key key
;
189 struct macsec_tx_sa_stats __percpu
*stats
;
193 struct pcpu_tx_sc_stats
{
194 struct macsec_tx_sc_stats stats
;
195 struct u64_stats_sync syncp
;
199 * struct macsec_tx_sc - transmit secure channel
201 * @encoding_sa: association number of the SA currently in use
202 * @encrypt: encrypt packets on transmit, or authenticate only
203 * @send_sci: always include the SCI in the SecTAG
205 * @scb: single copy broadcast flag
206 * @sa: array of secure associations
207 * @stats: stats for this TXSC
209 struct macsec_tx_sc
{
216 struct macsec_tx_sa __rcu
*sa
[MACSEC_NUM_AN
];
217 struct pcpu_tx_sc_stats __percpu
*stats
;
220 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
223 * struct macsec_secy - MACsec Security Entity
224 * @netdev: netdevice for this SecY
225 * @n_rx_sc: number of receive secure channels configured on this SecY
226 * @sci: secure channel identifier used for tx
227 * @key_len: length of keys used by the cipher suite
228 * @icv_len: length of ICV used by the cipher suite
229 * @validate_frames: validation mode
230 * @operational: MAC_Operational flag
231 * @protect_frames: enable protection for this SecY
232 * @replay_protect: enable packet number checks on receive
233 * @replay_window: size of the replay window
234 * @tx_sc: transmit secure channel
235 * @rx_sc: linked list of receive secure channels
238 struct net_device
*netdev
;
239 unsigned int n_rx_sc
;
243 enum macsec_validation_type validate_frames
;
248 struct macsec_tx_sc tx_sc
;
249 struct macsec_rx_sc __rcu
*rx_sc
;
252 struct pcpu_secy_stats
{
253 struct macsec_dev_stats stats
;
254 struct u64_stats_sync syncp
;
258 * struct macsec_dev - private data
260 * @real_dev: pointer to underlying netdevice
261 * @stats: MACsec device stats
262 * @secys: linked list of SecY's on the underlying device
265 struct macsec_secy secy
;
266 struct net_device
*real_dev
;
267 struct pcpu_secy_stats __percpu
*stats
;
268 struct list_head secys
;
269 struct gro_cells gro_cells
;
270 unsigned int nest_level
;
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 (!refcount_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 refcount_inc_not_zero(&sc
->refcnt
) ? sc
: NULL
;
333 static void macsec_rxsc_put(struct macsec_rx_sc
*sc
)
335 if (refcount_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
);
348 static void macsec_rxsa_put(struct macsec_rx_sa
*sa
)
350 if (refcount_dec_and_test(&sa
->refcnt
))
351 call_rcu(&sa
->rcu
, free_rxsa
);
354 static struct macsec_tx_sa
*macsec_txsa_get(struct macsec_tx_sa __rcu
*ptr
)
356 struct macsec_tx_sa
*sa
= rcu_dereference_bh(ptr
);
358 if (!sa
|| !sa
->active
)
361 if (!refcount_inc_not_zero(&sa
->refcnt
))
367 static void free_txsa(struct rcu_head
*head
)
369 struct macsec_tx_sa
*sa
= container_of(head
, struct macsec_tx_sa
, rcu
);
371 crypto_free_aead(sa
->key
.tfm
);
372 free_percpu(sa
->stats
);
376 static void macsec_txsa_put(struct macsec_tx_sa
*sa
)
378 if (refcount_dec_and_test(&sa
->refcnt
))
379 call_rcu(&sa
->rcu
, free_txsa
);
382 static struct macsec_cb
*macsec_skb_cb(struct sk_buff
*skb
)
384 BUILD_BUG_ON(sizeof(struct macsec_cb
) > sizeof(skb
->cb
));
385 return (struct macsec_cb
*)skb
->cb
;
388 #define MACSEC_PORT_ES (htons(0x0001))
389 #define MACSEC_PORT_SCB (0x0000)
390 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
392 #define MACSEC_GCM_AES_128_SAK_LEN 16
393 #define MACSEC_GCM_AES_256_SAK_LEN 32
395 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
396 #define DEFAULT_SEND_SCI true
397 #define DEFAULT_ENCRYPT false
398 #define DEFAULT_ENCODING_SA 0
400 static bool send_sci(const struct macsec_secy
*secy
)
402 const struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
404 return tx_sc
->send_sci
||
405 (secy
->n_rx_sc
> 1 && !tx_sc
->end_station
&& !tx_sc
->scb
);
408 static sci_t
make_sci(u8
*addr
, __be16 port
)
412 memcpy(&sci
, addr
, ETH_ALEN
);
413 memcpy(((char *)&sci
) + ETH_ALEN
, &port
, sizeof(port
));
418 static sci_t
macsec_frame_sci(struct macsec_eth_header
*hdr
, bool sci_present
)
423 memcpy(&sci
, hdr
->secure_channel_id
,
424 sizeof(hdr
->secure_channel_id
));
426 sci
= make_sci(hdr
->eth
.h_source
, MACSEC_PORT_ES
);
431 static unsigned int macsec_sectag_len(bool sci_present
)
433 return MACSEC_TAG_LEN
+ (sci_present
? MACSEC_SCI_LEN
: 0);
436 static unsigned int macsec_hdr_len(bool sci_present
)
438 return macsec_sectag_len(sci_present
) + ETH_HLEN
;
441 static unsigned int macsec_extra_len(bool sci_present
)
443 return macsec_sectag_len(sci_present
) + sizeof(__be16
);
446 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
447 static void macsec_fill_sectag(struct macsec_eth_header
*h
,
448 const struct macsec_secy
*secy
, u32 pn
,
451 const struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
453 memset(&h
->tci_an
, 0, macsec_sectag_len(sci_present
));
454 h
->eth
.h_proto
= htons(ETH_P_MACSEC
);
457 h
->tci_an
|= MACSEC_TCI_SC
;
458 memcpy(&h
->secure_channel_id
, &secy
->sci
,
459 sizeof(h
->secure_channel_id
));
461 if (tx_sc
->end_station
)
462 h
->tci_an
|= MACSEC_TCI_ES
;
464 h
->tci_an
|= MACSEC_TCI_SCB
;
467 h
->packet_number
= htonl(pn
);
469 /* with GCM, C/E clear for !encrypt, both set for encrypt */
471 h
->tci_an
|= MACSEC_TCI_CONFID
;
472 else if (secy
->icv_len
!= DEFAULT_ICV_LEN
)
473 h
->tci_an
|= MACSEC_TCI_C
;
475 h
->tci_an
|= tx_sc
->encoding_sa
;
478 static void macsec_set_shortlen(struct macsec_eth_header
*h
, size_t data_len
)
480 if (data_len
< MIN_NON_SHORT_LEN
)
481 h
->short_length
= data_len
;
484 /* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
485 static bool macsec_validate_skb(struct sk_buff
*skb
, u16 icv_len
)
487 struct macsec_eth_header
*h
= (struct macsec_eth_header
*)skb
->data
;
488 int len
= skb
->len
- 2 * ETH_ALEN
;
489 int extra_len
= macsec_extra_len(!!(h
->tci_an
& MACSEC_TCI_SC
)) + icv_len
;
491 /* a) It comprises at least 17 octets */
495 /* b) MACsec EtherType: already checked */
497 /* c) V bit is clear */
498 if (h
->tci_an
& MACSEC_TCI_VERSION
)
501 /* d) ES or SCB => !SC */
502 if ((h
->tci_an
& MACSEC_TCI_ES
|| h
->tci_an
& MACSEC_TCI_SCB
) &&
503 (h
->tci_an
& MACSEC_TCI_SC
))
506 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
510 /* rx.pn != 0 (figure 10-5) */
511 if (!h
->packet_number
)
514 /* length check, f) g) h) i) */
516 return len
== extra_len
+ h
->short_length
;
517 return len
>= extra_len
+ MIN_NON_SHORT_LEN
;
520 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
521 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
523 static void macsec_fill_iv(unsigned char *iv
, sci_t sci
, u32 pn
)
525 struct gcm_iv
*gcm_iv
= (struct gcm_iv
*)iv
;
528 gcm_iv
->pn
= htonl(pn
);
531 static struct macsec_eth_header
*macsec_ethhdr(struct sk_buff
*skb
)
533 return (struct macsec_eth_header
*)skb_mac_header(skb
);
536 static u32
tx_sa_update_pn(struct macsec_tx_sa
*tx_sa
, struct macsec_secy
*secy
)
540 spin_lock_bh(&tx_sa
->lock
);
544 if (tx_sa
->next_pn
== 0) {
545 pr_debug("PN wrapped, transitioning to !oper\n");
546 tx_sa
->active
= false;
547 if (secy
->protect_frames
)
548 secy
->operational
= false;
550 spin_unlock_bh(&tx_sa
->lock
);
555 static void macsec_encrypt_finish(struct sk_buff
*skb
, struct net_device
*dev
)
557 struct macsec_dev
*macsec
= netdev_priv(dev
);
559 skb
->dev
= macsec
->real_dev
;
560 skb_reset_mac_header(skb
);
561 skb
->protocol
= eth_hdr(skb
)->h_proto
;
564 static void macsec_count_tx(struct sk_buff
*skb
, struct macsec_tx_sc
*tx_sc
,
565 struct macsec_tx_sa
*tx_sa
)
567 struct pcpu_tx_sc_stats
*txsc_stats
= this_cpu_ptr(tx_sc
->stats
);
569 u64_stats_update_begin(&txsc_stats
->syncp
);
570 if (tx_sc
->encrypt
) {
571 txsc_stats
->stats
.OutOctetsEncrypted
+= skb
->len
;
572 txsc_stats
->stats
.OutPktsEncrypted
++;
573 this_cpu_inc(tx_sa
->stats
->OutPktsEncrypted
);
575 txsc_stats
->stats
.OutOctetsProtected
+= skb
->len
;
576 txsc_stats
->stats
.OutPktsProtected
++;
577 this_cpu_inc(tx_sa
->stats
->OutPktsProtected
);
579 u64_stats_update_end(&txsc_stats
->syncp
);
582 static void count_tx(struct net_device
*dev
, int ret
, int len
)
584 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
585 struct pcpu_sw_netstats
*stats
= this_cpu_ptr(dev
->tstats
);
587 u64_stats_update_begin(&stats
->syncp
);
589 stats
->tx_bytes
+= len
;
590 u64_stats_update_end(&stats
->syncp
);
594 static void macsec_encrypt_done(struct crypto_async_request
*base
, int err
)
596 struct sk_buff
*skb
= base
->data
;
597 struct net_device
*dev
= skb
->dev
;
598 struct macsec_dev
*macsec
= macsec_priv(dev
);
599 struct macsec_tx_sa
*sa
= macsec_skb_cb(skb
)->tx_sa
;
602 aead_request_free(macsec_skb_cb(skb
)->req
);
605 macsec_encrypt_finish(skb
, dev
);
606 macsec_count_tx(skb
, &macsec
->secy
.tx_sc
, macsec_skb_cb(skb
)->tx_sa
);
608 ret
= dev_queue_xmit(skb
);
609 count_tx(dev
, ret
, len
);
610 rcu_read_unlock_bh();
616 static struct aead_request
*macsec_alloc_req(struct crypto_aead
*tfm
,
618 struct scatterlist
**sg
,
621 size_t size
, iv_offset
, sg_offset
;
622 struct aead_request
*req
;
625 size
= sizeof(struct aead_request
) + crypto_aead_reqsize(tfm
);
627 size
+= GCM_AES_IV_LEN
;
629 size
= ALIGN(size
, __alignof__(struct scatterlist
));
631 size
+= sizeof(struct scatterlist
) * num_frags
;
633 tmp
= kmalloc(size
, GFP_ATOMIC
);
637 *iv
= (unsigned char *)(tmp
+ iv_offset
);
638 *sg
= (struct scatterlist
*)(tmp
+ sg_offset
);
641 aead_request_set_tfm(req
, tfm
);
646 static struct sk_buff
*macsec_encrypt(struct sk_buff
*skb
,
647 struct net_device
*dev
)
650 struct scatterlist
*sg
;
651 struct sk_buff
*trailer
;
654 struct macsec_eth_header
*hh
;
655 size_t unprotected_len
;
656 struct aead_request
*req
;
657 struct macsec_secy
*secy
;
658 struct macsec_tx_sc
*tx_sc
;
659 struct macsec_tx_sa
*tx_sa
;
660 struct macsec_dev
*macsec
= macsec_priv(dev
);
664 secy
= &macsec
->secy
;
665 tx_sc
= &secy
->tx_sc
;
667 /* 10.5.1 TX SA assignment */
668 tx_sa
= macsec_txsa_get(tx_sc
->sa
[tx_sc
->encoding_sa
]);
670 secy
->operational
= false;
672 return ERR_PTR(-EINVAL
);
675 if (unlikely(skb_headroom(skb
) < MACSEC_NEEDED_HEADROOM
||
676 skb_tailroom(skb
) < MACSEC_NEEDED_TAILROOM
)) {
677 struct sk_buff
*nskb
= skb_copy_expand(skb
,
678 MACSEC_NEEDED_HEADROOM
,
679 MACSEC_NEEDED_TAILROOM
,
685 macsec_txsa_put(tx_sa
);
687 return ERR_PTR(-ENOMEM
);
690 skb
= skb_unshare(skb
, GFP_ATOMIC
);
692 macsec_txsa_put(tx_sa
);
693 return ERR_PTR(-ENOMEM
);
697 unprotected_len
= skb
->len
;
699 sci_present
= send_sci(secy
);
700 hh
= skb_push(skb
, macsec_extra_len(sci_present
));
701 memmove(hh
, eth
, 2 * ETH_ALEN
);
703 pn
= tx_sa_update_pn(tx_sa
, secy
);
705 macsec_txsa_put(tx_sa
);
707 return ERR_PTR(-ENOLINK
);
709 macsec_fill_sectag(hh
, secy
, pn
, sci_present
);
710 macsec_set_shortlen(hh
, unprotected_len
- 2 * ETH_ALEN
);
712 skb_put(skb
, secy
->icv_len
);
714 if (skb
->len
- ETH_HLEN
> macsec_priv(dev
)->real_dev
->mtu
) {
715 struct pcpu_secy_stats
*secy_stats
= this_cpu_ptr(macsec
->stats
);
717 u64_stats_update_begin(&secy_stats
->syncp
);
718 secy_stats
->stats
.OutPktsTooLong
++;
719 u64_stats_update_end(&secy_stats
->syncp
);
721 macsec_txsa_put(tx_sa
);
723 return ERR_PTR(-EINVAL
);
726 ret
= skb_cow_data(skb
, 0, &trailer
);
727 if (unlikely(ret
< 0)) {
728 macsec_txsa_put(tx_sa
);
733 req
= macsec_alloc_req(tx_sa
->key
.tfm
, &iv
, &sg
, ret
);
735 macsec_txsa_put(tx_sa
);
737 return ERR_PTR(-ENOMEM
);
740 macsec_fill_iv(iv
, secy
->sci
, pn
);
742 sg_init_table(sg
, ret
);
743 ret
= skb_to_sgvec(skb
, sg
, 0, skb
->len
);
744 if (unlikely(ret
< 0)) {
745 aead_request_free(req
);
746 macsec_txsa_put(tx_sa
);
751 if (tx_sc
->encrypt
) {
752 int len
= skb
->len
- macsec_hdr_len(sci_present
) -
754 aead_request_set_crypt(req
, sg
, sg
, len
, iv
);
755 aead_request_set_ad(req
, macsec_hdr_len(sci_present
));
757 aead_request_set_crypt(req
, sg
, sg
, 0, iv
);
758 aead_request_set_ad(req
, skb
->len
- secy
->icv_len
);
761 macsec_skb_cb(skb
)->req
= req
;
762 macsec_skb_cb(skb
)->tx_sa
= tx_sa
;
763 aead_request_set_callback(req
, 0, macsec_encrypt_done
, skb
);
766 ret
= crypto_aead_encrypt(req
);
767 if (ret
== -EINPROGRESS
) {
769 } else if (ret
!= 0) {
772 aead_request_free(req
);
773 macsec_txsa_put(tx_sa
);
774 return ERR_PTR(-EINVAL
);
778 aead_request_free(req
);
779 macsec_txsa_put(tx_sa
);
784 static bool macsec_post_decrypt(struct sk_buff
*skb
, struct macsec_secy
*secy
, u32 pn
)
786 struct macsec_rx_sa
*rx_sa
= macsec_skb_cb(skb
)->rx_sa
;
787 struct pcpu_rx_sc_stats
*rxsc_stats
= this_cpu_ptr(rx_sa
->sc
->stats
);
788 struct macsec_eth_header
*hdr
= macsec_ethhdr(skb
);
791 spin_lock(&rx_sa
->lock
);
792 if (rx_sa
->next_pn
>= secy
->replay_window
)
793 lowest_pn
= rx_sa
->next_pn
- secy
->replay_window
;
795 /* Now perform replay protection check again
796 * (see IEEE 802.1AE-2006 figure 10-5)
798 if (secy
->replay_protect
&& pn
< lowest_pn
) {
799 spin_unlock(&rx_sa
->lock
);
800 u64_stats_update_begin(&rxsc_stats
->syncp
);
801 rxsc_stats
->stats
.InPktsLate
++;
802 u64_stats_update_end(&rxsc_stats
->syncp
);
806 if (secy
->validate_frames
!= MACSEC_VALIDATE_DISABLED
) {
807 u64_stats_update_begin(&rxsc_stats
->syncp
);
808 if (hdr
->tci_an
& MACSEC_TCI_E
)
809 rxsc_stats
->stats
.InOctetsDecrypted
+= skb
->len
;
811 rxsc_stats
->stats
.InOctetsValidated
+= skb
->len
;
812 u64_stats_update_end(&rxsc_stats
->syncp
);
815 if (!macsec_skb_cb(skb
)->valid
) {
816 spin_unlock(&rx_sa
->lock
);
819 if (hdr
->tci_an
& MACSEC_TCI_C
||
820 secy
->validate_frames
== MACSEC_VALIDATE_STRICT
) {
821 u64_stats_update_begin(&rxsc_stats
->syncp
);
822 rxsc_stats
->stats
.InPktsNotValid
++;
823 u64_stats_update_end(&rxsc_stats
->syncp
);
827 u64_stats_update_begin(&rxsc_stats
->syncp
);
828 if (secy
->validate_frames
== MACSEC_VALIDATE_CHECK
) {
829 rxsc_stats
->stats
.InPktsInvalid
++;
830 this_cpu_inc(rx_sa
->stats
->InPktsInvalid
);
831 } else if (pn
< lowest_pn
) {
832 rxsc_stats
->stats
.InPktsDelayed
++;
834 rxsc_stats
->stats
.InPktsUnchecked
++;
836 u64_stats_update_end(&rxsc_stats
->syncp
);
838 u64_stats_update_begin(&rxsc_stats
->syncp
);
839 if (pn
< lowest_pn
) {
840 rxsc_stats
->stats
.InPktsDelayed
++;
842 rxsc_stats
->stats
.InPktsOK
++;
843 this_cpu_inc(rx_sa
->stats
->InPktsOK
);
845 u64_stats_update_end(&rxsc_stats
->syncp
);
847 if (pn
>= rx_sa
->next_pn
)
848 rx_sa
->next_pn
= pn
+ 1;
849 spin_unlock(&rx_sa
->lock
);
855 static void macsec_reset_skb(struct sk_buff
*skb
, struct net_device
*dev
)
857 skb
->pkt_type
= PACKET_HOST
;
858 skb
->protocol
= eth_type_trans(skb
, dev
);
860 skb_reset_network_header(skb
);
861 if (!skb_transport_header_was_set(skb
))
862 skb_reset_transport_header(skb
);
863 skb_reset_mac_len(skb
);
866 static void macsec_finalize_skb(struct sk_buff
*skb
, u8 icv_len
, u8 hdr_len
)
868 skb
->ip_summed
= CHECKSUM_NONE
;
869 memmove(skb
->data
+ hdr_len
, skb
->data
, 2 * ETH_ALEN
);
870 skb_pull(skb
, hdr_len
);
871 pskb_trim_unique(skb
, skb
->len
- icv_len
);
874 static void count_rx(struct net_device
*dev
, int len
)
876 struct pcpu_sw_netstats
*stats
= this_cpu_ptr(dev
->tstats
);
878 u64_stats_update_begin(&stats
->syncp
);
880 stats
->rx_bytes
+= len
;
881 u64_stats_update_end(&stats
->syncp
);
884 static void macsec_decrypt_done(struct crypto_async_request
*base
, int err
)
886 struct sk_buff
*skb
= base
->data
;
887 struct net_device
*dev
= skb
->dev
;
888 struct macsec_dev
*macsec
= macsec_priv(dev
);
889 struct macsec_rx_sa
*rx_sa
= macsec_skb_cb(skb
)->rx_sa
;
890 struct macsec_rx_sc
*rx_sc
= rx_sa
->sc
;
894 aead_request_free(macsec_skb_cb(skb
)->req
);
897 macsec_skb_cb(skb
)->valid
= true;
900 pn
= ntohl(macsec_ethhdr(skb
)->packet_number
);
901 if (!macsec_post_decrypt(skb
, &macsec
->secy
, pn
)) {
902 rcu_read_unlock_bh();
907 macsec_finalize_skb(skb
, macsec
->secy
.icv_len
,
908 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
909 macsec_reset_skb(skb
, macsec
->secy
.netdev
);
912 if (gro_cells_receive(&macsec
->gro_cells
, skb
) == NET_RX_SUCCESS
)
915 rcu_read_unlock_bh();
918 macsec_rxsa_put(rx_sa
);
919 macsec_rxsc_put(rx_sc
);
923 static struct sk_buff
*macsec_decrypt(struct sk_buff
*skb
,
924 struct net_device
*dev
,
925 struct macsec_rx_sa
*rx_sa
,
927 struct macsec_secy
*secy
)
930 struct scatterlist
*sg
;
931 struct sk_buff
*trailer
;
933 struct aead_request
*req
;
934 struct macsec_eth_header
*hdr
;
935 u16 icv_len
= secy
->icv_len
;
937 macsec_skb_cb(skb
)->valid
= false;
938 skb
= skb_share_check(skb
, GFP_ATOMIC
);
940 return ERR_PTR(-ENOMEM
);
942 ret
= skb_cow_data(skb
, 0, &trailer
);
943 if (unlikely(ret
< 0)) {
947 req
= macsec_alloc_req(rx_sa
->key
.tfm
, &iv
, &sg
, ret
);
950 return ERR_PTR(-ENOMEM
);
953 hdr
= (struct macsec_eth_header
*)skb
->data
;
954 macsec_fill_iv(iv
, sci
, ntohl(hdr
->packet_number
));
956 sg_init_table(sg
, ret
);
957 ret
= skb_to_sgvec(skb
, sg
, 0, skb
->len
);
958 if (unlikely(ret
< 0)) {
959 aead_request_free(req
);
964 if (hdr
->tci_an
& MACSEC_TCI_E
) {
965 /* confidentiality: ethernet + macsec header
966 * authenticated, encrypted payload
968 int len
= skb
->len
- macsec_hdr_len(macsec_skb_cb(skb
)->has_sci
);
970 aead_request_set_crypt(req
, sg
, sg
, len
, iv
);
971 aead_request_set_ad(req
, macsec_hdr_len(macsec_skb_cb(skb
)->has_sci
));
972 skb
= skb_unshare(skb
, GFP_ATOMIC
);
974 aead_request_free(req
);
975 return ERR_PTR(-ENOMEM
);
978 /* integrity only: all headers + data authenticated */
979 aead_request_set_crypt(req
, sg
, sg
, icv_len
, iv
);
980 aead_request_set_ad(req
, skb
->len
- icv_len
);
983 macsec_skb_cb(skb
)->req
= req
;
985 aead_request_set_callback(req
, 0, macsec_decrypt_done
, skb
);
988 ret
= crypto_aead_decrypt(req
);
989 if (ret
== -EINPROGRESS
) {
991 } else if (ret
!= 0) {
992 /* decryption/authentication failed
993 * 10.6 if validateFrames is disabled, deliver anyway
995 if (ret
!= -EBADMSG
) {
1000 macsec_skb_cb(skb
)->valid
= true;
1004 aead_request_free(req
);
1009 static struct macsec_rx_sc
*find_rx_sc(struct macsec_secy
*secy
, sci_t sci
)
1011 struct macsec_rx_sc
*rx_sc
;
1013 for_each_rxsc(secy
, rx_sc
) {
1014 if (rx_sc
->sci
== sci
)
1021 static struct macsec_rx_sc
*find_rx_sc_rtnl(struct macsec_secy
*secy
, sci_t sci
)
1023 struct macsec_rx_sc
*rx_sc
;
1025 for_each_rxsc_rtnl(secy
, rx_sc
) {
1026 if (rx_sc
->sci
== sci
)
1033 static void handle_not_macsec(struct sk_buff
*skb
)
1035 struct macsec_rxh_data
*rxd
;
1036 struct macsec_dev
*macsec
;
1039 rxd
= macsec_data_rcu(skb
->dev
);
1041 /* 10.6 If the management control validateFrames is not
1042 * Strict, frames without a SecTAG are received, counted, and
1043 * delivered to the Controlled Port
1045 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
1046 struct sk_buff
*nskb
;
1047 struct pcpu_secy_stats
*secy_stats
= this_cpu_ptr(macsec
->stats
);
1049 if (macsec
->secy
.validate_frames
== MACSEC_VALIDATE_STRICT
) {
1050 u64_stats_update_begin(&secy_stats
->syncp
);
1051 secy_stats
->stats
.InPktsNoTag
++;
1052 u64_stats_update_end(&secy_stats
->syncp
);
1056 /* deliver on this port */
1057 nskb
= skb_clone(skb
, GFP_ATOMIC
);
1061 nskb
->dev
= macsec
->secy
.netdev
;
1063 if (netif_rx(nskb
) == NET_RX_SUCCESS
) {
1064 u64_stats_update_begin(&secy_stats
->syncp
);
1065 secy_stats
->stats
.InPktsUntagged
++;
1066 u64_stats_update_end(&secy_stats
->syncp
);
1073 static rx_handler_result_t
macsec_handle_frame(struct sk_buff
**pskb
)
1075 struct sk_buff
*skb
= *pskb
;
1076 struct net_device
*dev
= skb
->dev
;
1077 struct macsec_eth_header
*hdr
;
1078 struct macsec_secy
*secy
= NULL
;
1079 struct macsec_rx_sc
*rx_sc
;
1080 struct macsec_rx_sa
*rx_sa
;
1081 struct macsec_rxh_data
*rxd
;
1082 struct macsec_dev
*macsec
;
1086 struct pcpu_rx_sc_stats
*rxsc_stats
;
1087 struct pcpu_secy_stats
*secy_stats
;
1091 if (skb_headroom(skb
) < ETH_HLEN
)
1094 hdr
= macsec_ethhdr(skb
);
1095 if (hdr
->eth
.h_proto
!= htons(ETH_P_MACSEC
)) {
1096 handle_not_macsec(skb
);
1098 /* and deliver to the uncontrolled port */
1099 return RX_HANDLER_PASS
;
1102 skb
= skb_unshare(skb
, GFP_ATOMIC
);
1105 return RX_HANDLER_CONSUMED
;
1107 pulled_sci
= pskb_may_pull(skb
, macsec_extra_len(true));
1109 if (!pskb_may_pull(skb
, macsec_extra_len(false)))
1113 hdr
= macsec_ethhdr(skb
);
1115 /* Frames with a SecTAG that has the TCI E bit set but the C
1116 * bit clear are discarded, as this reserved encoding is used
1117 * to identify frames with a SecTAG that are not to be
1118 * delivered to the Controlled Port.
1120 if ((hdr
->tci_an
& (MACSEC_TCI_C
| MACSEC_TCI_E
)) == MACSEC_TCI_E
)
1121 return RX_HANDLER_PASS
;
1123 /* now, pull the extra length */
1124 if (hdr
->tci_an
& MACSEC_TCI_SC
) {
1129 /* ethernet header is part of crypto processing */
1130 skb_push(skb
, ETH_HLEN
);
1132 macsec_skb_cb(skb
)->has_sci
= !!(hdr
->tci_an
& MACSEC_TCI_SC
);
1133 macsec_skb_cb(skb
)->assoc_num
= hdr
->tci_an
& MACSEC_AN_MASK
;
1134 sci
= macsec_frame_sci(hdr
, macsec_skb_cb(skb
)->has_sci
);
1137 rxd
= macsec_data_rcu(skb
->dev
);
1139 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
1140 struct macsec_rx_sc
*sc
= find_rx_sc(&macsec
->secy
, sci
);
1142 sc
= sc
? macsec_rxsc_get(sc
) : NULL
;
1145 secy
= &macsec
->secy
;
1155 macsec
= macsec_priv(dev
);
1156 secy_stats
= this_cpu_ptr(macsec
->stats
);
1157 rxsc_stats
= this_cpu_ptr(rx_sc
->stats
);
1159 if (!macsec_validate_skb(skb
, secy
->icv_len
)) {
1160 u64_stats_update_begin(&secy_stats
->syncp
);
1161 secy_stats
->stats
.InPktsBadTag
++;
1162 u64_stats_update_end(&secy_stats
->syncp
);
1166 rx_sa
= macsec_rxsa_get(rx_sc
->sa
[macsec_skb_cb(skb
)->assoc_num
]);
1168 /* 10.6.1 if the SA is not in use */
1170 /* If validateFrames is Strict or the C bit in the
1171 * SecTAG is set, discard
1173 if (hdr
->tci_an
& MACSEC_TCI_C
||
1174 secy
->validate_frames
== MACSEC_VALIDATE_STRICT
) {
1175 u64_stats_update_begin(&rxsc_stats
->syncp
);
1176 rxsc_stats
->stats
.InPktsNotUsingSA
++;
1177 u64_stats_update_end(&rxsc_stats
->syncp
);
1181 /* not Strict, the frame (with the SecTAG and ICV
1182 * removed) is delivered to the Controlled Port.
1184 u64_stats_update_begin(&rxsc_stats
->syncp
);
1185 rxsc_stats
->stats
.InPktsUnusedSA
++;
1186 u64_stats_update_end(&rxsc_stats
->syncp
);
1190 /* First, PN check to avoid decrypting obviously wrong packets */
1191 pn
= ntohl(hdr
->packet_number
);
1192 if (secy
->replay_protect
) {
1195 spin_lock(&rx_sa
->lock
);
1196 late
= rx_sa
->next_pn
>= secy
->replay_window
&&
1197 pn
< (rx_sa
->next_pn
- secy
->replay_window
);
1198 spin_unlock(&rx_sa
->lock
);
1201 u64_stats_update_begin(&rxsc_stats
->syncp
);
1202 rxsc_stats
->stats
.InPktsLate
++;
1203 u64_stats_update_end(&rxsc_stats
->syncp
);
1208 macsec_skb_cb(skb
)->rx_sa
= rx_sa
;
1210 /* Disabled && !changed text => skip validation */
1211 if (hdr
->tci_an
& MACSEC_TCI_C
||
1212 secy
->validate_frames
!= MACSEC_VALIDATE_DISABLED
)
1213 skb
= macsec_decrypt(skb
, dev
, rx_sa
, sci
, secy
);
1216 /* the decrypt callback needs the reference */
1217 if (PTR_ERR(skb
) != -EINPROGRESS
) {
1218 macsec_rxsa_put(rx_sa
);
1219 macsec_rxsc_put(rx_sc
);
1223 return RX_HANDLER_CONSUMED
;
1226 if (!macsec_post_decrypt(skb
, secy
, pn
))
1230 macsec_finalize_skb(skb
, secy
->icv_len
,
1231 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
1232 macsec_reset_skb(skb
, secy
->netdev
);
1235 macsec_rxsa_put(rx_sa
);
1236 macsec_rxsc_put(rx_sc
);
1239 ret
= gro_cells_receive(&macsec
->gro_cells
, skb
);
1240 if (ret
== NET_RX_SUCCESS
)
1241 count_rx(dev
, skb
->len
);
1243 macsec
->secy
.netdev
->stats
.rx_dropped
++;
1248 return RX_HANDLER_CONSUMED
;
1251 macsec_rxsa_put(rx_sa
);
1253 macsec_rxsc_put(rx_sc
);
1258 return RX_HANDLER_CONSUMED
;
1261 /* 10.6.1 if the SC is not found */
1262 cbit
= !!(hdr
->tci_an
& MACSEC_TCI_C
);
1264 macsec_finalize_skb(skb
, DEFAULT_ICV_LEN
,
1265 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
1267 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
1268 struct sk_buff
*nskb
;
1270 secy_stats
= this_cpu_ptr(macsec
->stats
);
1272 /* If validateFrames is Strict or the C bit in the
1273 * SecTAG is set, discard
1276 macsec
->secy
.validate_frames
== MACSEC_VALIDATE_STRICT
) {
1277 u64_stats_update_begin(&secy_stats
->syncp
);
1278 secy_stats
->stats
.InPktsNoSCI
++;
1279 u64_stats_update_end(&secy_stats
->syncp
);
1283 /* not strict, the frame (with the SecTAG and ICV
1284 * removed) is delivered to the Controlled Port.
1286 nskb
= skb_clone(skb
, GFP_ATOMIC
);
1290 macsec_reset_skb(nskb
, macsec
->secy
.netdev
);
1292 ret
= netif_rx(nskb
);
1293 if (ret
== NET_RX_SUCCESS
) {
1294 u64_stats_update_begin(&secy_stats
->syncp
);
1295 secy_stats
->stats
.InPktsUnknownSCI
++;
1296 u64_stats_update_end(&secy_stats
->syncp
);
1298 macsec
->secy
.netdev
->stats
.rx_dropped
++;
1304 return RX_HANDLER_PASS
;
1307 static struct crypto_aead
*macsec_alloc_tfm(char *key
, int key_len
, int icv_len
)
1309 struct crypto_aead
*tfm
;
1312 tfm
= crypto_alloc_aead("gcm(aes)", 0, 0);
1317 ret
= crypto_aead_setkey(tfm
, key
, key_len
);
1321 ret
= crypto_aead_setauthsize(tfm
, icv_len
);
1327 crypto_free_aead(tfm
);
1328 return ERR_PTR(ret
);
1331 static int init_rx_sa(struct macsec_rx_sa
*rx_sa
, char *sak
, int key_len
,
1334 rx_sa
->stats
= alloc_percpu(struct macsec_rx_sa_stats
);
1338 rx_sa
->key
.tfm
= macsec_alloc_tfm(sak
, key_len
, icv_len
);
1339 if (IS_ERR(rx_sa
->key
.tfm
)) {
1340 free_percpu(rx_sa
->stats
);
1341 return PTR_ERR(rx_sa
->key
.tfm
);
1344 rx_sa
->active
= false;
1346 refcount_set(&rx_sa
->refcnt
, 1);
1347 spin_lock_init(&rx_sa
->lock
);
1352 static void clear_rx_sa(struct macsec_rx_sa
*rx_sa
)
1354 rx_sa
->active
= false;
1356 macsec_rxsa_put(rx_sa
);
1359 static void free_rx_sc(struct macsec_rx_sc
*rx_sc
)
1363 for (i
= 0; i
< MACSEC_NUM_AN
; i
++) {
1364 struct macsec_rx_sa
*sa
= rtnl_dereference(rx_sc
->sa
[i
]);
1366 RCU_INIT_POINTER(rx_sc
->sa
[i
], NULL
);
1371 macsec_rxsc_put(rx_sc
);
1374 static struct macsec_rx_sc
*del_rx_sc(struct macsec_secy
*secy
, sci_t sci
)
1376 struct macsec_rx_sc
*rx_sc
, __rcu
**rx_scp
;
1378 for (rx_scp
= &secy
->rx_sc
, rx_sc
= rtnl_dereference(*rx_scp
);
1380 rx_scp
= &rx_sc
->next
, rx_sc
= rtnl_dereference(*rx_scp
)) {
1381 if (rx_sc
->sci
== sci
) {
1384 rcu_assign_pointer(*rx_scp
, rx_sc
->next
);
1392 static struct macsec_rx_sc
*create_rx_sc(struct net_device
*dev
, sci_t sci
)
1394 struct macsec_rx_sc
*rx_sc
;
1395 struct macsec_dev
*macsec
;
1396 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
1397 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
1398 struct macsec_secy
*secy
;
1400 list_for_each_entry(macsec
, &rxd
->secys
, secys
) {
1401 if (find_rx_sc_rtnl(&macsec
->secy
, sci
))
1402 return ERR_PTR(-EEXIST
);
1405 rx_sc
= kzalloc(sizeof(*rx_sc
), GFP_KERNEL
);
1407 return ERR_PTR(-ENOMEM
);
1409 rx_sc
->stats
= netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats
);
1410 if (!rx_sc
->stats
) {
1412 return ERR_PTR(-ENOMEM
);
1416 rx_sc
->active
= true;
1417 refcount_set(&rx_sc
->refcnt
, 1);
1419 secy
= &macsec_priv(dev
)->secy
;
1420 rcu_assign_pointer(rx_sc
->next
, secy
->rx_sc
);
1421 rcu_assign_pointer(secy
->rx_sc
, rx_sc
);
1429 static int init_tx_sa(struct macsec_tx_sa
*tx_sa
, char *sak
, int key_len
,
1432 tx_sa
->stats
= alloc_percpu(struct macsec_tx_sa_stats
);
1436 tx_sa
->key
.tfm
= macsec_alloc_tfm(sak
, key_len
, icv_len
);
1437 if (IS_ERR(tx_sa
->key
.tfm
)) {
1438 free_percpu(tx_sa
->stats
);
1439 return PTR_ERR(tx_sa
->key
.tfm
);
1442 tx_sa
->active
= false;
1443 refcount_set(&tx_sa
->refcnt
, 1);
1444 spin_lock_init(&tx_sa
->lock
);
1449 static void clear_tx_sa(struct macsec_tx_sa
*tx_sa
)
1451 tx_sa
->active
= false;
1453 macsec_txsa_put(tx_sa
);
1456 static struct genl_family macsec_fam
;
1458 static struct net_device
*get_dev_from_nl(struct net
*net
,
1459 struct nlattr
**attrs
)
1461 int ifindex
= nla_get_u32(attrs
[MACSEC_ATTR_IFINDEX
]);
1462 struct net_device
*dev
;
1464 dev
= __dev_get_by_index(net
, ifindex
);
1466 return ERR_PTR(-ENODEV
);
1468 if (!netif_is_macsec(dev
))
1469 return ERR_PTR(-ENODEV
);
1474 static sci_t
nla_get_sci(const struct nlattr
*nla
)
1476 return (__force sci_t
)nla_get_u64(nla
);
1479 static int nla_put_sci(struct sk_buff
*skb
, int attrtype
, sci_t value
,
1482 return nla_put_u64_64bit(skb
, attrtype
, (__force u64
)value
, padattr
);
1485 static struct macsec_tx_sa
*get_txsa_from_nl(struct net
*net
,
1486 struct nlattr
**attrs
,
1487 struct nlattr
**tb_sa
,
1488 struct net_device
**devp
,
1489 struct macsec_secy
**secyp
,
1490 struct macsec_tx_sc
**scp
,
1493 struct net_device
*dev
;
1494 struct macsec_secy
*secy
;
1495 struct macsec_tx_sc
*tx_sc
;
1496 struct macsec_tx_sa
*tx_sa
;
1498 if (!tb_sa
[MACSEC_SA_ATTR_AN
])
1499 return ERR_PTR(-EINVAL
);
1501 *assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1503 dev
= get_dev_from_nl(net
, attrs
);
1505 return ERR_CAST(dev
);
1507 if (*assoc_num
>= MACSEC_NUM_AN
)
1508 return ERR_PTR(-EINVAL
);
1510 secy
= &macsec_priv(dev
)->secy
;
1511 tx_sc
= &secy
->tx_sc
;
1513 tx_sa
= rtnl_dereference(tx_sc
->sa
[*assoc_num
]);
1515 return ERR_PTR(-ENODEV
);
1523 static struct macsec_rx_sc
*get_rxsc_from_nl(struct net
*net
,
1524 struct nlattr
**attrs
,
1525 struct nlattr
**tb_rxsc
,
1526 struct net_device
**devp
,
1527 struct macsec_secy
**secyp
)
1529 struct net_device
*dev
;
1530 struct macsec_secy
*secy
;
1531 struct macsec_rx_sc
*rx_sc
;
1534 dev
= get_dev_from_nl(net
, attrs
);
1536 return ERR_CAST(dev
);
1538 secy
= &macsec_priv(dev
)->secy
;
1540 if (!tb_rxsc
[MACSEC_RXSC_ATTR_SCI
])
1541 return ERR_PTR(-EINVAL
);
1543 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1544 rx_sc
= find_rx_sc_rtnl(secy
, sci
);
1546 return ERR_PTR(-ENODEV
);
1554 static struct macsec_rx_sa
*get_rxsa_from_nl(struct net
*net
,
1555 struct nlattr
**attrs
,
1556 struct nlattr
**tb_rxsc
,
1557 struct nlattr
**tb_sa
,
1558 struct net_device
**devp
,
1559 struct macsec_secy
**secyp
,
1560 struct macsec_rx_sc
**scp
,
1563 struct macsec_rx_sc
*rx_sc
;
1564 struct macsec_rx_sa
*rx_sa
;
1566 if (!tb_sa
[MACSEC_SA_ATTR_AN
])
1567 return ERR_PTR(-EINVAL
);
1569 *assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1570 if (*assoc_num
>= MACSEC_NUM_AN
)
1571 return ERR_PTR(-EINVAL
);
1573 rx_sc
= get_rxsc_from_nl(net
, attrs
, tb_rxsc
, devp
, secyp
);
1575 return ERR_CAST(rx_sc
);
1577 rx_sa
= rtnl_dereference(rx_sc
->sa
[*assoc_num
]);
1579 return ERR_PTR(-ENODEV
);
1585 static const struct nla_policy macsec_genl_policy
[NUM_MACSEC_ATTR
] = {
1586 [MACSEC_ATTR_IFINDEX
] = { .type
= NLA_U32
},
1587 [MACSEC_ATTR_RXSC_CONFIG
] = { .type
= NLA_NESTED
},
1588 [MACSEC_ATTR_SA_CONFIG
] = { .type
= NLA_NESTED
},
1591 static const struct nla_policy macsec_genl_rxsc_policy
[NUM_MACSEC_RXSC_ATTR
] = {
1592 [MACSEC_RXSC_ATTR_SCI
] = { .type
= NLA_U64
},
1593 [MACSEC_RXSC_ATTR_ACTIVE
] = { .type
= NLA_U8
},
1596 static const struct nla_policy macsec_genl_sa_policy
[NUM_MACSEC_SA_ATTR
] = {
1597 [MACSEC_SA_ATTR_AN
] = { .type
= NLA_U8
},
1598 [MACSEC_SA_ATTR_ACTIVE
] = { .type
= NLA_U8
},
1599 [MACSEC_SA_ATTR_PN
] = { .type
= NLA_U32
},
1600 [MACSEC_SA_ATTR_KEYID
] = { .type
= NLA_BINARY
,
1601 .len
= MACSEC_KEYID_LEN
, },
1602 [MACSEC_SA_ATTR_KEY
] = { .type
= NLA_BINARY
,
1603 .len
= MACSEC_MAX_KEY_LEN
, },
1606 static int parse_sa_config(struct nlattr
**attrs
, struct nlattr
**tb_sa
)
1608 if (!attrs
[MACSEC_ATTR_SA_CONFIG
])
1611 if (nla_parse_nested_deprecated(tb_sa
, MACSEC_SA_ATTR_MAX
, attrs
[MACSEC_ATTR_SA_CONFIG
], macsec_genl_sa_policy
, NULL
))
1617 static int parse_rxsc_config(struct nlattr
**attrs
, struct nlattr
**tb_rxsc
)
1619 if (!attrs
[MACSEC_ATTR_RXSC_CONFIG
])
1622 if (nla_parse_nested_deprecated(tb_rxsc
, MACSEC_RXSC_ATTR_MAX
, attrs
[MACSEC_ATTR_RXSC_CONFIG
], macsec_genl_rxsc_policy
, NULL
))
1628 static bool validate_add_rxsa(struct nlattr
**attrs
)
1630 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1631 !attrs
[MACSEC_SA_ATTR_KEY
] ||
1632 !attrs
[MACSEC_SA_ATTR_KEYID
])
1635 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1638 if (attrs
[MACSEC_SA_ATTR_PN
] && nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1641 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1642 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1646 if (nla_len(attrs
[MACSEC_SA_ATTR_KEYID
]) != MACSEC_KEYID_LEN
)
1652 static int macsec_add_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1654 struct net_device
*dev
;
1655 struct nlattr
**attrs
= info
->attrs
;
1656 struct macsec_secy
*secy
;
1657 struct macsec_rx_sc
*rx_sc
;
1658 struct macsec_rx_sa
*rx_sa
;
1659 unsigned char assoc_num
;
1660 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1661 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1664 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1667 if (parse_sa_config(attrs
, tb_sa
))
1670 if (parse_rxsc_config(attrs
, tb_rxsc
))
1673 if (!validate_add_rxsa(tb_sa
))
1677 rx_sc
= get_rxsc_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, &dev
, &secy
);
1678 if (IS_ERR(rx_sc
)) {
1680 return PTR_ERR(rx_sc
);
1683 assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1685 if (nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]) != secy
->key_len
) {
1686 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1687 nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]), secy
->key_len
);
1692 rx_sa
= rtnl_dereference(rx_sc
->sa
[assoc_num
]);
1698 rx_sa
= kmalloc(sizeof(*rx_sa
), GFP_KERNEL
);
1704 err
= init_rx_sa(rx_sa
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
1705 secy
->key_len
, secy
->icv_len
);
1712 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
1713 spin_lock_bh(&rx_sa
->lock
);
1714 rx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
1715 spin_unlock_bh(&rx_sa
->lock
);
1718 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1719 rx_sa
->active
= !!nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1721 nla_memcpy(rx_sa
->key
.id
, tb_sa
[MACSEC_SA_ATTR_KEYID
], MACSEC_KEYID_LEN
);
1723 rcu_assign_pointer(rx_sc
->sa
[assoc_num
], rx_sa
);
1730 static bool validate_add_rxsc(struct nlattr
**attrs
)
1732 if (!attrs
[MACSEC_RXSC_ATTR_SCI
])
1735 if (attrs
[MACSEC_RXSC_ATTR_ACTIVE
]) {
1736 if (nla_get_u8(attrs
[MACSEC_RXSC_ATTR_ACTIVE
]) > 1)
1743 static int macsec_add_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
1745 struct net_device
*dev
;
1746 sci_t sci
= MACSEC_UNDEF_SCI
;
1747 struct nlattr
**attrs
= info
->attrs
;
1748 struct macsec_rx_sc
*rx_sc
;
1749 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1751 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1754 if (parse_rxsc_config(attrs
, tb_rxsc
))
1757 if (!validate_add_rxsc(tb_rxsc
))
1761 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
1764 return PTR_ERR(dev
);
1767 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1769 rx_sc
= create_rx_sc(dev
, sci
);
1770 if (IS_ERR(rx_sc
)) {
1772 return PTR_ERR(rx_sc
);
1775 if (tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
])
1776 rx_sc
->active
= !!nla_get_u8(tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]);
1783 static bool validate_add_txsa(struct nlattr
**attrs
)
1785 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1786 !attrs
[MACSEC_SA_ATTR_PN
] ||
1787 !attrs
[MACSEC_SA_ATTR_KEY
] ||
1788 !attrs
[MACSEC_SA_ATTR_KEYID
])
1791 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1794 if (nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1797 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1798 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1802 if (nla_len(attrs
[MACSEC_SA_ATTR_KEYID
]) != MACSEC_KEYID_LEN
)
1808 static int macsec_add_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1810 struct net_device
*dev
;
1811 struct nlattr
**attrs
= info
->attrs
;
1812 struct macsec_secy
*secy
;
1813 struct macsec_tx_sc
*tx_sc
;
1814 struct macsec_tx_sa
*tx_sa
;
1815 unsigned char assoc_num
;
1816 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1819 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1822 if (parse_sa_config(attrs
, tb_sa
))
1825 if (!validate_add_txsa(tb_sa
))
1829 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
1832 return PTR_ERR(dev
);
1835 secy
= &macsec_priv(dev
)->secy
;
1836 tx_sc
= &secy
->tx_sc
;
1838 assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1840 if (nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]) != secy
->key_len
) {
1841 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1842 nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]), secy
->key_len
);
1847 tx_sa
= rtnl_dereference(tx_sc
->sa
[assoc_num
]);
1853 tx_sa
= kmalloc(sizeof(*tx_sa
), GFP_KERNEL
);
1859 err
= init_tx_sa(tx_sa
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
1860 secy
->key_len
, secy
->icv_len
);
1867 nla_memcpy(tx_sa
->key
.id
, tb_sa
[MACSEC_SA_ATTR_KEYID
], MACSEC_KEYID_LEN
);
1869 spin_lock_bh(&tx_sa
->lock
);
1870 tx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
1871 spin_unlock_bh(&tx_sa
->lock
);
1873 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1874 tx_sa
->active
= !!nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1876 if (assoc_num
== tx_sc
->encoding_sa
&& tx_sa
->active
)
1877 secy
->operational
= true;
1879 rcu_assign_pointer(tx_sc
->sa
[assoc_num
], tx_sa
);
1886 static int macsec_del_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1888 struct nlattr
**attrs
= info
->attrs
;
1889 struct net_device
*dev
;
1890 struct macsec_secy
*secy
;
1891 struct macsec_rx_sc
*rx_sc
;
1892 struct macsec_rx_sa
*rx_sa
;
1894 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1895 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1897 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1900 if (parse_sa_config(attrs
, tb_sa
))
1903 if (parse_rxsc_config(attrs
, tb_rxsc
))
1907 rx_sa
= get_rxsa_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, tb_sa
,
1908 &dev
, &secy
, &rx_sc
, &assoc_num
);
1909 if (IS_ERR(rx_sa
)) {
1911 return PTR_ERR(rx_sa
);
1914 if (rx_sa
->active
) {
1919 RCU_INIT_POINTER(rx_sc
->sa
[assoc_num
], NULL
);
1927 static int macsec_del_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
1929 struct nlattr
**attrs
= info
->attrs
;
1930 struct net_device
*dev
;
1931 struct macsec_secy
*secy
;
1932 struct macsec_rx_sc
*rx_sc
;
1934 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1936 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1939 if (parse_rxsc_config(attrs
, tb_rxsc
))
1942 if (!tb_rxsc
[MACSEC_RXSC_ATTR_SCI
])
1946 dev
= get_dev_from_nl(genl_info_net(info
), info
->attrs
);
1949 return PTR_ERR(dev
);
1952 secy
= &macsec_priv(dev
)->secy
;
1953 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1955 rx_sc
= del_rx_sc(secy
, sci
);
1967 static int macsec_del_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1969 struct nlattr
**attrs
= info
->attrs
;
1970 struct net_device
*dev
;
1971 struct macsec_secy
*secy
;
1972 struct macsec_tx_sc
*tx_sc
;
1973 struct macsec_tx_sa
*tx_sa
;
1975 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1977 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1980 if (parse_sa_config(attrs
, tb_sa
))
1984 tx_sa
= get_txsa_from_nl(genl_info_net(info
), attrs
, tb_sa
,
1985 &dev
, &secy
, &tx_sc
, &assoc_num
);
1986 if (IS_ERR(tx_sa
)) {
1988 return PTR_ERR(tx_sa
);
1991 if (tx_sa
->active
) {
1996 RCU_INIT_POINTER(tx_sc
->sa
[assoc_num
], NULL
);
2004 static bool validate_upd_sa(struct nlattr
**attrs
)
2006 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
2007 attrs
[MACSEC_SA_ATTR_KEY
] ||
2008 attrs
[MACSEC_SA_ATTR_KEYID
])
2011 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
2014 if (attrs
[MACSEC_SA_ATTR_PN
] && nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
2017 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
2018 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
2025 static int macsec_upd_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
2027 struct nlattr
**attrs
= info
->attrs
;
2028 struct net_device
*dev
;
2029 struct macsec_secy
*secy
;
2030 struct macsec_tx_sc
*tx_sc
;
2031 struct macsec_tx_sa
*tx_sa
;
2033 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
2035 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2038 if (parse_sa_config(attrs
, tb_sa
))
2041 if (!validate_upd_sa(tb_sa
))
2045 tx_sa
= get_txsa_from_nl(genl_info_net(info
), attrs
, tb_sa
,
2046 &dev
, &secy
, &tx_sc
, &assoc_num
);
2047 if (IS_ERR(tx_sa
)) {
2049 return PTR_ERR(tx_sa
);
2052 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
2053 spin_lock_bh(&tx_sa
->lock
);
2054 tx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
2055 spin_unlock_bh(&tx_sa
->lock
);
2058 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
2059 tx_sa
->active
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
2061 if (assoc_num
== tx_sc
->encoding_sa
)
2062 secy
->operational
= tx_sa
->active
;
2069 static int macsec_upd_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
2071 struct nlattr
**attrs
= info
->attrs
;
2072 struct net_device
*dev
;
2073 struct macsec_secy
*secy
;
2074 struct macsec_rx_sc
*rx_sc
;
2075 struct macsec_rx_sa
*rx_sa
;
2077 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
2078 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
2080 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2083 if (parse_rxsc_config(attrs
, tb_rxsc
))
2086 if (parse_sa_config(attrs
, tb_sa
))
2089 if (!validate_upd_sa(tb_sa
))
2093 rx_sa
= get_rxsa_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, tb_sa
,
2094 &dev
, &secy
, &rx_sc
, &assoc_num
);
2095 if (IS_ERR(rx_sa
)) {
2097 return PTR_ERR(rx_sa
);
2100 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
2101 spin_lock_bh(&rx_sa
->lock
);
2102 rx_sa
->next_pn
= nla_get_u32(tb_sa
[MACSEC_SA_ATTR_PN
]);
2103 spin_unlock_bh(&rx_sa
->lock
);
2106 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
2107 rx_sa
->active
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
2113 static int macsec_upd_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
2115 struct nlattr
**attrs
= info
->attrs
;
2116 struct net_device
*dev
;
2117 struct macsec_secy
*secy
;
2118 struct macsec_rx_sc
*rx_sc
;
2119 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
2121 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2124 if (parse_rxsc_config(attrs
, tb_rxsc
))
2127 if (!validate_add_rxsc(tb_rxsc
))
2131 rx_sc
= get_rxsc_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, &dev
, &secy
);
2132 if (IS_ERR(rx_sc
)) {
2134 return PTR_ERR(rx_sc
);
2137 if (tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]) {
2138 bool new = !!nla_get_u8(tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]);
2140 if (rx_sc
->active
!= new)
2141 secy
->n_rx_sc
+= new ? 1 : -1;
2143 rx_sc
->active
= new;
2151 static int copy_tx_sa_stats(struct sk_buff
*skb
,
2152 struct macsec_tx_sa_stats __percpu
*pstats
)
2154 struct macsec_tx_sa_stats sum
= {0, };
2157 for_each_possible_cpu(cpu
) {
2158 const struct macsec_tx_sa_stats
*stats
= per_cpu_ptr(pstats
, cpu
);
2160 sum
.OutPktsProtected
+= stats
->OutPktsProtected
;
2161 sum
.OutPktsEncrypted
+= stats
->OutPktsEncrypted
;
2164 if (nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED
, sum
.OutPktsProtected
) ||
2165 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED
, sum
.OutPktsEncrypted
))
2171 static noinline_for_stack
int
2172 copy_rx_sa_stats(struct sk_buff
*skb
,
2173 struct macsec_rx_sa_stats __percpu
*pstats
)
2175 struct macsec_rx_sa_stats sum
= {0, };
2178 for_each_possible_cpu(cpu
) {
2179 const struct macsec_rx_sa_stats
*stats
= per_cpu_ptr(pstats
, cpu
);
2181 sum
.InPktsOK
+= stats
->InPktsOK
;
2182 sum
.InPktsInvalid
+= stats
->InPktsInvalid
;
2183 sum
.InPktsNotValid
+= stats
->InPktsNotValid
;
2184 sum
.InPktsNotUsingSA
+= stats
->InPktsNotUsingSA
;
2185 sum
.InPktsUnusedSA
+= stats
->InPktsUnusedSA
;
2188 if (nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_OK
, sum
.InPktsOK
) ||
2189 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID
, sum
.InPktsInvalid
) ||
2190 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID
, sum
.InPktsNotValid
) ||
2191 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA
, sum
.InPktsNotUsingSA
) ||
2192 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA
, sum
.InPktsUnusedSA
))
2198 static noinline_for_stack
int
2199 copy_rx_sc_stats(struct sk_buff
*skb
, struct pcpu_rx_sc_stats __percpu
*pstats
)
2201 struct macsec_rx_sc_stats sum
= {0, };
2204 for_each_possible_cpu(cpu
) {
2205 const struct pcpu_rx_sc_stats
*stats
;
2206 struct macsec_rx_sc_stats tmp
;
2209 stats
= per_cpu_ptr(pstats
, cpu
);
2211 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2212 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2213 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2215 sum
.InOctetsValidated
+= tmp
.InOctetsValidated
;
2216 sum
.InOctetsDecrypted
+= tmp
.InOctetsDecrypted
;
2217 sum
.InPktsUnchecked
+= tmp
.InPktsUnchecked
;
2218 sum
.InPktsDelayed
+= tmp
.InPktsDelayed
;
2219 sum
.InPktsOK
+= tmp
.InPktsOK
;
2220 sum
.InPktsInvalid
+= tmp
.InPktsInvalid
;
2221 sum
.InPktsLate
+= tmp
.InPktsLate
;
2222 sum
.InPktsNotValid
+= tmp
.InPktsNotValid
;
2223 sum
.InPktsNotUsingSA
+= tmp
.InPktsNotUsingSA
;
2224 sum
.InPktsUnusedSA
+= tmp
.InPktsUnusedSA
;
2227 if (nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED
,
2228 sum
.InOctetsValidated
,
2229 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2230 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED
,
2231 sum
.InOctetsDecrypted
,
2232 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2233 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED
,
2234 sum
.InPktsUnchecked
,
2235 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2236 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED
,
2238 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2239 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK
,
2241 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2242 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID
,
2244 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2245 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE
,
2247 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2248 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID
,
2250 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2251 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA
,
2252 sum
.InPktsNotUsingSA
,
2253 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2254 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA
,
2256 MACSEC_RXSC_STATS_ATTR_PAD
))
2262 static noinline_for_stack
int
2263 copy_tx_sc_stats(struct sk_buff
*skb
, struct pcpu_tx_sc_stats __percpu
*pstats
)
2265 struct macsec_tx_sc_stats sum
= {0, };
2268 for_each_possible_cpu(cpu
) {
2269 const struct pcpu_tx_sc_stats
*stats
;
2270 struct macsec_tx_sc_stats tmp
;
2273 stats
= per_cpu_ptr(pstats
, cpu
);
2275 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2276 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2277 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2279 sum
.OutPktsProtected
+= tmp
.OutPktsProtected
;
2280 sum
.OutPktsEncrypted
+= tmp
.OutPktsEncrypted
;
2281 sum
.OutOctetsProtected
+= tmp
.OutOctetsProtected
;
2282 sum
.OutOctetsEncrypted
+= tmp
.OutOctetsEncrypted
;
2285 if (nla_put_u64_64bit(skb
, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED
,
2286 sum
.OutPktsProtected
,
2287 MACSEC_TXSC_STATS_ATTR_PAD
) ||
2288 nla_put_u64_64bit(skb
, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED
,
2289 sum
.OutPktsEncrypted
,
2290 MACSEC_TXSC_STATS_ATTR_PAD
) ||
2291 nla_put_u64_64bit(skb
, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED
,
2292 sum
.OutOctetsProtected
,
2293 MACSEC_TXSC_STATS_ATTR_PAD
) ||
2294 nla_put_u64_64bit(skb
, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED
,
2295 sum
.OutOctetsEncrypted
,
2296 MACSEC_TXSC_STATS_ATTR_PAD
))
2302 static noinline_for_stack
int
2303 copy_secy_stats(struct sk_buff
*skb
, struct pcpu_secy_stats __percpu
*pstats
)
2305 struct macsec_dev_stats sum
= {0, };
2308 for_each_possible_cpu(cpu
) {
2309 const struct pcpu_secy_stats
*stats
;
2310 struct macsec_dev_stats tmp
;
2313 stats
= per_cpu_ptr(pstats
, cpu
);
2315 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2316 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2317 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2319 sum
.OutPktsUntagged
+= tmp
.OutPktsUntagged
;
2320 sum
.InPktsUntagged
+= tmp
.InPktsUntagged
;
2321 sum
.OutPktsTooLong
+= tmp
.OutPktsTooLong
;
2322 sum
.InPktsNoTag
+= tmp
.InPktsNoTag
;
2323 sum
.InPktsBadTag
+= tmp
.InPktsBadTag
;
2324 sum
.InPktsUnknownSCI
+= tmp
.InPktsUnknownSCI
;
2325 sum
.InPktsNoSCI
+= tmp
.InPktsNoSCI
;
2326 sum
.InPktsOverrun
+= tmp
.InPktsOverrun
;
2329 if (nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED
,
2330 sum
.OutPktsUntagged
,
2331 MACSEC_SECY_STATS_ATTR_PAD
) ||
2332 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED
,
2334 MACSEC_SECY_STATS_ATTR_PAD
) ||
2335 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG
,
2337 MACSEC_SECY_STATS_ATTR_PAD
) ||
2338 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG
,
2340 MACSEC_SECY_STATS_ATTR_PAD
) ||
2341 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG
,
2343 MACSEC_SECY_STATS_ATTR_PAD
) ||
2344 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI
,
2345 sum
.InPktsUnknownSCI
,
2346 MACSEC_SECY_STATS_ATTR_PAD
) ||
2347 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI
,
2349 MACSEC_SECY_STATS_ATTR_PAD
) ||
2350 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN
,
2352 MACSEC_SECY_STATS_ATTR_PAD
))
2358 static int nla_put_secy(struct macsec_secy
*secy
, struct sk_buff
*skb
)
2360 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
2361 struct nlattr
*secy_nest
= nla_nest_start_noflag(skb
,
2368 switch (secy
->key_len
) {
2369 case MACSEC_GCM_AES_128_SAK_LEN
:
2370 csid
= MACSEC_DEFAULT_CIPHER_ID
;
2372 case MACSEC_GCM_AES_256_SAK_LEN
:
2373 csid
= MACSEC_CIPHER_ID_GCM_AES_256
;
2379 if (nla_put_sci(skb
, MACSEC_SECY_ATTR_SCI
, secy
->sci
,
2380 MACSEC_SECY_ATTR_PAD
) ||
2381 nla_put_u64_64bit(skb
, MACSEC_SECY_ATTR_CIPHER_SUITE
,
2382 csid
, MACSEC_SECY_ATTR_PAD
) ||
2383 nla_put_u8(skb
, MACSEC_SECY_ATTR_ICV_LEN
, secy
->icv_len
) ||
2384 nla_put_u8(skb
, MACSEC_SECY_ATTR_OPER
, secy
->operational
) ||
2385 nla_put_u8(skb
, MACSEC_SECY_ATTR_PROTECT
, secy
->protect_frames
) ||
2386 nla_put_u8(skb
, MACSEC_SECY_ATTR_REPLAY
, secy
->replay_protect
) ||
2387 nla_put_u8(skb
, MACSEC_SECY_ATTR_VALIDATE
, secy
->validate_frames
) ||
2388 nla_put_u8(skb
, MACSEC_SECY_ATTR_ENCRYPT
, tx_sc
->encrypt
) ||
2389 nla_put_u8(skb
, MACSEC_SECY_ATTR_INC_SCI
, tx_sc
->send_sci
) ||
2390 nla_put_u8(skb
, MACSEC_SECY_ATTR_ES
, tx_sc
->end_station
) ||
2391 nla_put_u8(skb
, MACSEC_SECY_ATTR_SCB
, tx_sc
->scb
) ||
2392 nla_put_u8(skb
, MACSEC_SECY_ATTR_ENCODING_SA
, tx_sc
->encoding_sa
))
2395 if (secy
->replay_protect
) {
2396 if (nla_put_u32(skb
, MACSEC_SECY_ATTR_WINDOW
, secy
->replay_window
))
2400 nla_nest_end(skb
, secy_nest
);
2404 nla_nest_cancel(skb
, secy_nest
);
2408 static noinline_for_stack
int
2409 dump_secy(struct macsec_secy
*secy
, struct net_device
*dev
,
2410 struct sk_buff
*skb
, struct netlink_callback
*cb
)
2412 struct macsec_rx_sc
*rx_sc
;
2413 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
2414 struct nlattr
*txsa_list
, *rxsc_list
;
2417 struct nlattr
*attr
;
2419 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
2420 &macsec_fam
, NLM_F_MULTI
, MACSEC_CMD_GET_TXSC
);
2424 genl_dump_check_consistent(cb
, hdr
);
2426 if (nla_put_u32(skb
, MACSEC_ATTR_IFINDEX
, dev
->ifindex
))
2427 goto nla_put_failure
;
2429 if (nla_put_secy(secy
, skb
))
2430 goto nla_put_failure
;
2432 attr
= nla_nest_start_noflag(skb
, MACSEC_ATTR_TXSC_STATS
);
2434 goto nla_put_failure
;
2435 if (copy_tx_sc_stats(skb
, tx_sc
->stats
)) {
2436 nla_nest_cancel(skb
, attr
);
2437 goto nla_put_failure
;
2439 nla_nest_end(skb
, attr
);
2441 attr
= nla_nest_start_noflag(skb
, MACSEC_ATTR_SECY_STATS
);
2443 goto nla_put_failure
;
2444 if (copy_secy_stats(skb
, macsec_priv(dev
)->stats
)) {
2445 nla_nest_cancel(skb
, attr
);
2446 goto nla_put_failure
;
2448 nla_nest_end(skb
, attr
);
2450 txsa_list
= nla_nest_start_noflag(skb
, MACSEC_ATTR_TXSA_LIST
);
2452 goto nla_put_failure
;
2453 for (i
= 0, j
= 1; i
< MACSEC_NUM_AN
; i
++) {
2454 struct macsec_tx_sa
*tx_sa
= rtnl_dereference(tx_sc
->sa
[i
]);
2455 struct nlattr
*txsa_nest
;
2460 txsa_nest
= nla_nest_start_noflag(skb
, j
++);
2462 nla_nest_cancel(skb
, txsa_list
);
2463 goto nla_put_failure
;
2466 if (nla_put_u8(skb
, MACSEC_SA_ATTR_AN
, i
) ||
2467 nla_put_u32(skb
, MACSEC_SA_ATTR_PN
, tx_sa
->next_pn
) ||
2468 nla_put(skb
, MACSEC_SA_ATTR_KEYID
, MACSEC_KEYID_LEN
, tx_sa
->key
.id
) ||
2469 nla_put_u8(skb
, MACSEC_SA_ATTR_ACTIVE
, tx_sa
->active
)) {
2470 nla_nest_cancel(skb
, txsa_nest
);
2471 nla_nest_cancel(skb
, txsa_list
);
2472 goto nla_put_failure
;
2475 attr
= nla_nest_start_noflag(skb
, MACSEC_SA_ATTR_STATS
);
2477 nla_nest_cancel(skb
, txsa_nest
);
2478 nla_nest_cancel(skb
, txsa_list
);
2479 goto nla_put_failure
;
2481 if (copy_tx_sa_stats(skb
, tx_sa
->stats
)) {
2482 nla_nest_cancel(skb
, attr
);
2483 nla_nest_cancel(skb
, txsa_nest
);
2484 nla_nest_cancel(skb
, txsa_list
);
2485 goto nla_put_failure
;
2487 nla_nest_end(skb
, attr
);
2489 nla_nest_end(skb
, txsa_nest
);
2491 nla_nest_end(skb
, txsa_list
);
2493 rxsc_list
= nla_nest_start_noflag(skb
, MACSEC_ATTR_RXSC_LIST
);
2495 goto nla_put_failure
;
2498 for_each_rxsc_rtnl(secy
, rx_sc
) {
2500 struct nlattr
*rxsa_list
;
2501 struct nlattr
*rxsc_nest
= nla_nest_start_noflag(skb
, j
++);
2504 nla_nest_cancel(skb
, rxsc_list
);
2505 goto nla_put_failure
;
2508 if (nla_put_u8(skb
, MACSEC_RXSC_ATTR_ACTIVE
, rx_sc
->active
) ||
2509 nla_put_sci(skb
, MACSEC_RXSC_ATTR_SCI
, rx_sc
->sci
,
2510 MACSEC_RXSC_ATTR_PAD
)) {
2511 nla_nest_cancel(skb
, rxsc_nest
);
2512 nla_nest_cancel(skb
, rxsc_list
);
2513 goto nla_put_failure
;
2516 attr
= nla_nest_start_noflag(skb
, MACSEC_RXSC_ATTR_STATS
);
2518 nla_nest_cancel(skb
, rxsc_nest
);
2519 nla_nest_cancel(skb
, rxsc_list
);
2520 goto nla_put_failure
;
2522 if (copy_rx_sc_stats(skb
, rx_sc
->stats
)) {
2523 nla_nest_cancel(skb
, attr
);
2524 nla_nest_cancel(skb
, rxsc_nest
);
2525 nla_nest_cancel(skb
, rxsc_list
);
2526 goto nla_put_failure
;
2528 nla_nest_end(skb
, attr
);
2530 rxsa_list
= nla_nest_start_noflag(skb
,
2531 MACSEC_RXSC_ATTR_SA_LIST
);
2533 nla_nest_cancel(skb
, rxsc_nest
);
2534 nla_nest_cancel(skb
, rxsc_list
);
2535 goto nla_put_failure
;
2538 for (i
= 0, k
= 1; i
< MACSEC_NUM_AN
; i
++) {
2539 struct macsec_rx_sa
*rx_sa
= rtnl_dereference(rx_sc
->sa
[i
]);
2540 struct nlattr
*rxsa_nest
;
2545 rxsa_nest
= nla_nest_start_noflag(skb
, k
++);
2547 nla_nest_cancel(skb
, rxsa_list
);
2548 nla_nest_cancel(skb
, rxsc_nest
);
2549 nla_nest_cancel(skb
, rxsc_list
);
2550 goto nla_put_failure
;
2553 attr
= nla_nest_start_noflag(skb
,
2554 MACSEC_SA_ATTR_STATS
);
2556 nla_nest_cancel(skb
, rxsa_list
);
2557 nla_nest_cancel(skb
, rxsc_nest
);
2558 nla_nest_cancel(skb
, rxsc_list
);
2559 goto nla_put_failure
;
2561 if (copy_rx_sa_stats(skb
, rx_sa
->stats
)) {
2562 nla_nest_cancel(skb
, attr
);
2563 nla_nest_cancel(skb
, rxsa_list
);
2564 nla_nest_cancel(skb
, rxsc_nest
);
2565 nla_nest_cancel(skb
, rxsc_list
);
2566 goto nla_put_failure
;
2568 nla_nest_end(skb
, attr
);
2570 if (nla_put_u8(skb
, MACSEC_SA_ATTR_AN
, i
) ||
2571 nla_put_u32(skb
, MACSEC_SA_ATTR_PN
, rx_sa
->next_pn
) ||
2572 nla_put(skb
, MACSEC_SA_ATTR_KEYID
, MACSEC_KEYID_LEN
, rx_sa
->key
.id
) ||
2573 nla_put_u8(skb
, MACSEC_SA_ATTR_ACTIVE
, rx_sa
->active
)) {
2574 nla_nest_cancel(skb
, rxsa_nest
);
2575 nla_nest_cancel(skb
, rxsc_nest
);
2576 nla_nest_cancel(skb
, rxsc_list
);
2577 goto nla_put_failure
;
2579 nla_nest_end(skb
, rxsa_nest
);
2582 nla_nest_end(skb
, rxsa_list
);
2583 nla_nest_end(skb
, rxsc_nest
);
2586 nla_nest_end(skb
, rxsc_list
);
2588 genlmsg_end(skb
, hdr
);
2593 genlmsg_cancel(skb
, hdr
);
2597 static int macsec_generation
= 1; /* protected by RTNL */
2599 static int macsec_dump_txsc(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2601 struct net
*net
= sock_net(skb
->sk
);
2602 struct net_device
*dev
;
2605 dev_idx
= cb
->args
[0];
2610 cb
->seq
= macsec_generation
;
2612 for_each_netdev(net
, dev
) {
2613 struct macsec_secy
*secy
;
2618 if (!netif_is_macsec(dev
))
2621 secy
= &macsec_priv(dev
)->secy
;
2622 if (dump_secy(secy
, dev
, skb
, cb
) < 0)
2634 static const struct genl_ops macsec_genl_ops
[] = {
2636 .cmd
= MACSEC_CMD_GET_TXSC
,
2637 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2638 .dumpit
= macsec_dump_txsc
,
2641 .cmd
= MACSEC_CMD_ADD_RXSC
,
2642 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2643 .doit
= macsec_add_rxsc
,
2644 .flags
= GENL_ADMIN_PERM
,
2647 .cmd
= MACSEC_CMD_DEL_RXSC
,
2648 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2649 .doit
= macsec_del_rxsc
,
2650 .flags
= GENL_ADMIN_PERM
,
2653 .cmd
= MACSEC_CMD_UPD_RXSC
,
2654 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2655 .doit
= macsec_upd_rxsc
,
2656 .flags
= GENL_ADMIN_PERM
,
2659 .cmd
= MACSEC_CMD_ADD_TXSA
,
2660 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2661 .doit
= macsec_add_txsa
,
2662 .flags
= GENL_ADMIN_PERM
,
2665 .cmd
= MACSEC_CMD_DEL_TXSA
,
2666 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2667 .doit
= macsec_del_txsa
,
2668 .flags
= GENL_ADMIN_PERM
,
2671 .cmd
= MACSEC_CMD_UPD_TXSA
,
2672 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2673 .doit
= macsec_upd_txsa
,
2674 .flags
= GENL_ADMIN_PERM
,
2677 .cmd
= MACSEC_CMD_ADD_RXSA
,
2678 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2679 .doit
= macsec_add_rxsa
,
2680 .flags
= GENL_ADMIN_PERM
,
2683 .cmd
= MACSEC_CMD_DEL_RXSA
,
2684 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2685 .doit
= macsec_del_rxsa
,
2686 .flags
= GENL_ADMIN_PERM
,
2689 .cmd
= MACSEC_CMD_UPD_RXSA
,
2690 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2691 .doit
= macsec_upd_rxsa
,
2692 .flags
= GENL_ADMIN_PERM
,
2696 static struct genl_family macsec_fam __ro_after_init
= {
2697 .name
= MACSEC_GENL_NAME
,
2699 .version
= MACSEC_GENL_VERSION
,
2700 .maxattr
= MACSEC_ATTR_MAX
,
2701 .policy
= macsec_genl_policy
,
2703 .module
= THIS_MODULE
,
2704 .ops
= macsec_genl_ops
,
2705 .n_ops
= ARRAY_SIZE(macsec_genl_ops
),
2708 static netdev_tx_t
macsec_start_xmit(struct sk_buff
*skb
,
2709 struct net_device
*dev
)
2711 struct macsec_dev
*macsec
= netdev_priv(dev
);
2712 struct macsec_secy
*secy
= &macsec
->secy
;
2713 struct pcpu_secy_stats
*secy_stats
;
2717 if (!secy
->protect_frames
) {
2718 secy_stats
= this_cpu_ptr(macsec
->stats
);
2719 u64_stats_update_begin(&secy_stats
->syncp
);
2720 secy_stats
->stats
.OutPktsUntagged
++;
2721 u64_stats_update_end(&secy_stats
->syncp
);
2722 skb
->dev
= macsec
->real_dev
;
2724 ret
= dev_queue_xmit(skb
);
2725 count_tx(dev
, ret
, len
);
2729 if (!secy
->operational
) {
2731 dev
->stats
.tx_dropped
++;
2732 return NETDEV_TX_OK
;
2735 skb
= macsec_encrypt(skb
, dev
);
2737 if (PTR_ERR(skb
) != -EINPROGRESS
)
2738 dev
->stats
.tx_dropped
++;
2739 return NETDEV_TX_OK
;
2742 macsec_count_tx(skb
, &macsec
->secy
.tx_sc
, macsec_skb_cb(skb
)->tx_sa
);
2744 macsec_encrypt_finish(skb
, dev
);
2746 ret
= dev_queue_xmit(skb
);
2747 count_tx(dev
, ret
, len
);
2751 #define MACSEC_FEATURES \
2752 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
2753 static struct lock_class_key macsec_netdev_addr_lock_key
;
2755 static int macsec_dev_init(struct net_device
*dev
)
2757 struct macsec_dev
*macsec
= macsec_priv(dev
);
2758 struct net_device
*real_dev
= macsec
->real_dev
;
2761 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
2765 err
= gro_cells_init(&macsec
->gro_cells
, dev
);
2767 free_percpu(dev
->tstats
);
2771 dev
->features
= real_dev
->features
& MACSEC_FEATURES
;
2772 dev
->features
|= NETIF_F_LLTX
| NETIF_F_GSO_SOFTWARE
;
2774 dev
->needed_headroom
= real_dev
->needed_headroom
+
2775 MACSEC_NEEDED_HEADROOM
;
2776 dev
->needed_tailroom
= real_dev
->needed_tailroom
+
2777 MACSEC_NEEDED_TAILROOM
;
2779 if (is_zero_ether_addr(dev
->dev_addr
))
2780 eth_hw_addr_inherit(dev
, real_dev
);
2781 if (is_zero_ether_addr(dev
->broadcast
))
2782 memcpy(dev
->broadcast
, real_dev
->broadcast
, dev
->addr_len
);
2787 static void macsec_dev_uninit(struct net_device
*dev
)
2789 struct macsec_dev
*macsec
= macsec_priv(dev
);
2791 gro_cells_destroy(&macsec
->gro_cells
);
2792 free_percpu(dev
->tstats
);
2795 static netdev_features_t
macsec_fix_features(struct net_device
*dev
,
2796 netdev_features_t features
)
2798 struct macsec_dev
*macsec
= macsec_priv(dev
);
2799 struct net_device
*real_dev
= macsec
->real_dev
;
2801 features
&= (real_dev
->features
& MACSEC_FEATURES
) |
2802 NETIF_F_GSO_SOFTWARE
| NETIF_F_SOFT_FEATURES
;
2803 features
|= NETIF_F_LLTX
;
2808 static int macsec_dev_open(struct net_device
*dev
)
2810 struct macsec_dev
*macsec
= macsec_priv(dev
);
2811 struct net_device
*real_dev
= macsec
->real_dev
;
2814 err
= dev_uc_add(real_dev
, dev
->dev_addr
);
2818 if (dev
->flags
& IFF_ALLMULTI
) {
2819 err
= dev_set_allmulti(real_dev
, 1);
2824 if (dev
->flags
& IFF_PROMISC
) {
2825 err
= dev_set_promiscuity(real_dev
, 1);
2827 goto clear_allmulti
;
2830 if (netif_carrier_ok(real_dev
))
2831 netif_carrier_on(dev
);
2835 if (dev
->flags
& IFF_ALLMULTI
)
2836 dev_set_allmulti(real_dev
, -1);
2838 dev_uc_del(real_dev
, dev
->dev_addr
);
2839 netif_carrier_off(dev
);
2843 static int macsec_dev_stop(struct net_device
*dev
)
2845 struct macsec_dev
*macsec
= macsec_priv(dev
);
2846 struct net_device
*real_dev
= macsec
->real_dev
;
2848 netif_carrier_off(dev
);
2850 dev_mc_unsync(real_dev
, dev
);
2851 dev_uc_unsync(real_dev
, dev
);
2853 if (dev
->flags
& IFF_ALLMULTI
)
2854 dev_set_allmulti(real_dev
, -1);
2856 if (dev
->flags
& IFF_PROMISC
)
2857 dev_set_promiscuity(real_dev
, -1);
2859 dev_uc_del(real_dev
, dev
->dev_addr
);
2864 static void macsec_dev_change_rx_flags(struct net_device
*dev
, int change
)
2866 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
2868 if (!(dev
->flags
& IFF_UP
))
2871 if (change
& IFF_ALLMULTI
)
2872 dev_set_allmulti(real_dev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
2874 if (change
& IFF_PROMISC
)
2875 dev_set_promiscuity(real_dev
,
2876 dev
->flags
& IFF_PROMISC
? 1 : -1);
2879 static void macsec_dev_set_rx_mode(struct net_device
*dev
)
2881 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
2883 dev_mc_sync(real_dev
, dev
);
2884 dev_uc_sync(real_dev
, dev
);
2887 static int macsec_set_mac_address(struct net_device
*dev
, void *p
)
2889 struct macsec_dev
*macsec
= macsec_priv(dev
);
2890 struct net_device
*real_dev
= macsec
->real_dev
;
2891 struct sockaddr
*addr
= p
;
2894 if (!is_valid_ether_addr(addr
->sa_data
))
2895 return -EADDRNOTAVAIL
;
2897 if (!(dev
->flags
& IFF_UP
))
2900 err
= dev_uc_add(real_dev
, addr
->sa_data
);
2904 dev_uc_del(real_dev
, dev
->dev_addr
);
2907 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
2911 static int macsec_change_mtu(struct net_device
*dev
, int new_mtu
)
2913 struct macsec_dev
*macsec
= macsec_priv(dev
);
2914 unsigned int extra
= macsec
->secy
.icv_len
+ macsec_extra_len(true);
2916 if (macsec
->real_dev
->mtu
- extra
< new_mtu
)
2924 static void macsec_get_stats64(struct net_device
*dev
,
2925 struct rtnl_link_stats64
*s
)
2932 for_each_possible_cpu(cpu
) {
2933 struct pcpu_sw_netstats
*stats
;
2934 struct pcpu_sw_netstats tmp
;
2937 stats
= per_cpu_ptr(dev
->tstats
, cpu
);
2939 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2940 tmp
.rx_packets
= stats
->rx_packets
;
2941 tmp
.rx_bytes
= stats
->rx_bytes
;
2942 tmp
.tx_packets
= stats
->tx_packets
;
2943 tmp
.tx_bytes
= stats
->tx_bytes
;
2944 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2946 s
->rx_packets
+= tmp
.rx_packets
;
2947 s
->rx_bytes
+= tmp
.rx_bytes
;
2948 s
->tx_packets
+= tmp
.tx_packets
;
2949 s
->tx_bytes
+= tmp
.tx_bytes
;
2952 s
->rx_dropped
= dev
->stats
.rx_dropped
;
2953 s
->tx_dropped
= dev
->stats
.tx_dropped
;
2956 static int macsec_get_iflink(const struct net_device
*dev
)
2958 return macsec_priv(dev
)->real_dev
->ifindex
;
2961 static int macsec_get_nest_level(struct net_device
*dev
)
2963 return macsec_priv(dev
)->nest_level
;
2966 static const struct net_device_ops macsec_netdev_ops
= {
2967 .ndo_init
= macsec_dev_init
,
2968 .ndo_uninit
= macsec_dev_uninit
,
2969 .ndo_open
= macsec_dev_open
,
2970 .ndo_stop
= macsec_dev_stop
,
2971 .ndo_fix_features
= macsec_fix_features
,
2972 .ndo_change_mtu
= macsec_change_mtu
,
2973 .ndo_set_rx_mode
= macsec_dev_set_rx_mode
,
2974 .ndo_change_rx_flags
= macsec_dev_change_rx_flags
,
2975 .ndo_set_mac_address
= macsec_set_mac_address
,
2976 .ndo_start_xmit
= macsec_start_xmit
,
2977 .ndo_get_stats64
= macsec_get_stats64
,
2978 .ndo_get_iflink
= macsec_get_iflink
,
2979 .ndo_get_lock_subclass
= macsec_get_nest_level
,
2982 static const struct device_type macsec_type
= {
2986 static const struct nla_policy macsec_rtnl_policy
[IFLA_MACSEC_MAX
+ 1] = {
2987 [IFLA_MACSEC_SCI
] = { .type
= NLA_U64
},
2988 [IFLA_MACSEC_ICV_LEN
] = { .type
= NLA_U8
},
2989 [IFLA_MACSEC_CIPHER_SUITE
] = { .type
= NLA_U64
},
2990 [IFLA_MACSEC_WINDOW
] = { .type
= NLA_U32
},
2991 [IFLA_MACSEC_ENCODING_SA
] = { .type
= NLA_U8
},
2992 [IFLA_MACSEC_ENCRYPT
] = { .type
= NLA_U8
},
2993 [IFLA_MACSEC_PROTECT
] = { .type
= NLA_U8
},
2994 [IFLA_MACSEC_INC_SCI
] = { .type
= NLA_U8
},
2995 [IFLA_MACSEC_ES
] = { .type
= NLA_U8
},
2996 [IFLA_MACSEC_SCB
] = { .type
= NLA_U8
},
2997 [IFLA_MACSEC_REPLAY_PROTECT
] = { .type
= NLA_U8
},
2998 [IFLA_MACSEC_VALIDATION
] = { .type
= NLA_U8
},
3001 static void macsec_free_netdev(struct net_device
*dev
)
3003 struct macsec_dev
*macsec
= macsec_priv(dev
);
3005 free_percpu(macsec
->stats
);
3006 free_percpu(macsec
->secy
.tx_sc
.stats
);
3010 static void macsec_setup(struct net_device
*dev
)
3014 dev
->max_mtu
= ETH_MAX_MTU
;
3015 dev
->priv_flags
|= IFF_NO_QUEUE
;
3016 dev
->netdev_ops
= &macsec_netdev_ops
;
3017 dev
->needs_free_netdev
= true;
3018 dev
->priv_destructor
= macsec_free_netdev
;
3019 SET_NETDEV_DEVTYPE(dev
, &macsec_type
);
3021 eth_zero_addr(dev
->broadcast
);
3024 static int macsec_changelink_common(struct net_device
*dev
,
3025 struct nlattr
*data
[])
3027 struct macsec_secy
*secy
;
3028 struct macsec_tx_sc
*tx_sc
;
3030 secy
= &macsec_priv(dev
)->secy
;
3031 tx_sc
= &secy
->tx_sc
;
3033 if (data
[IFLA_MACSEC_ENCODING_SA
]) {
3034 struct macsec_tx_sa
*tx_sa
;
3036 tx_sc
->encoding_sa
= nla_get_u8(data
[IFLA_MACSEC_ENCODING_SA
]);
3037 tx_sa
= rtnl_dereference(tx_sc
->sa
[tx_sc
->encoding_sa
]);
3039 secy
->operational
= tx_sa
&& tx_sa
->active
;
3042 if (data
[IFLA_MACSEC_WINDOW
])
3043 secy
->replay_window
= nla_get_u32(data
[IFLA_MACSEC_WINDOW
]);
3045 if (data
[IFLA_MACSEC_ENCRYPT
])
3046 tx_sc
->encrypt
= !!nla_get_u8(data
[IFLA_MACSEC_ENCRYPT
]);
3048 if (data
[IFLA_MACSEC_PROTECT
])
3049 secy
->protect_frames
= !!nla_get_u8(data
[IFLA_MACSEC_PROTECT
]);
3051 if (data
[IFLA_MACSEC_INC_SCI
])
3052 tx_sc
->send_sci
= !!nla_get_u8(data
[IFLA_MACSEC_INC_SCI
]);
3054 if (data
[IFLA_MACSEC_ES
])
3055 tx_sc
->end_station
= !!nla_get_u8(data
[IFLA_MACSEC_ES
]);
3057 if (data
[IFLA_MACSEC_SCB
])
3058 tx_sc
->scb
= !!nla_get_u8(data
[IFLA_MACSEC_SCB
]);
3060 if (data
[IFLA_MACSEC_REPLAY_PROTECT
])
3061 secy
->replay_protect
= !!nla_get_u8(data
[IFLA_MACSEC_REPLAY_PROTECT
]);
3063 if (data
[IFLA_MACSEC_VALIDATION
])
3064 secy
->validate_frames
= nla_get_u8(data
[IFLA_MACSEC_VALIDATION
]);
3066 if (data
[IFLA_MACSEC_CIPHER_SUITE
]) {
3067 switch (nla_get_u64(data
[IFLA_MACSEC_CIPHER_SUITE
])) {
3068 case MACSEC_CIPHER_ID_GCM_AES_128
:
3069 case MACSEC_DEFAULT_CIPHER_ID
:
3070 secy
->key_len
= MACSEC_GCM_AES_128_SAK_LEN
;
3072 case MACSEC_CIPHER_ID_GCM_AES_256
:
3073 secy
->key_len
= MACSEC_GCM_AES_256_SAK_LEN
;
3083 static int macsec_changelink(struct net_device
*dev
, struct nlattr
*tb
[],
3084 struct nlattr
*data
[],
3085 struct netlink_ext_ack
*extack
)
3090 if (data
[IFLA_MACSEC_CIPHER_SUITE
] ||
3091 data
[IFLA_MACSEC_ICV_LEN
] ||
3092 data
[IFLA_MACSEC_SCI
] ||
3093 data
[IFLA_MACSEC_PORT
])
3096 return macsec_changelink_common(dev
, data
);
3099 static void macsec_del_dev(struct macsec_dev
*macsec
)
3103 while (macsec
->secy
.rx_sc
) {
3104 struct macsec_rx_sc
*rx_sc
= rtnl_dereference(macsec
->secy
.rx_sc
);
3106 rcu_assign_pointer(macsec
->secy
.rx_sc
, rx_sc
->next
);
3110 for (i
= 0; i
< MACSEC_NUM_AN
; i
++) {
3111 struct macsec_tx_sa
*sa
= rtnl_dereference(macsec
->secy
.tx_sc
.sa
[i
]);
3114 RCU_INIT_POINTER(macsec
->secy
.tx_sc
.sa
[i
], NULL
);
3120 static void macsec_common_dellink(struct net_device
*dev
, struct list_head
*head
)
3122 struct macsec_dev
*macsec
= macsec_priv(dev
);
3123 struct net_device
*real_dev
= macsec
->real_dev
;
3125 unregister_netdevice_queue(dev
, head
);
3126 list_del_rcu(&macsec
->secys
);
3127 macsec_del_dev(macsec
);
3128 netdev_upper_dev_unlink(real_dev
, dev
);
3130 macsec_generation
++;
3133 static void macsec_dellink(struct net_device
*dev
, struct list_head
*head
)
3135 struct macsec_dev
*macsec
= macsec_priv(dev
);
3136 struct net_device
*real_dev
= macsec
->real_dev
;
3137 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
3139 macsec_common_dellink(dev
, head
);
3141 if (list_empty(&rxd
->secys
)) {
3142 netdev_rx_handler_unregister(real_dev
);
3147 static int register_macsec_dev(struct net_device
*real_dev
,
3148 struct net_device
*dev
)
3150 struct macsec_dev
*macsec
= macsec_priv(dev
);
3151 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
3156 rxd
= kmalloc(sizeof(*rxd
), GFP_KERNEL
);
3160 INIT_LIST_HEAD(&rxd
->secys
);
3162 err
= netdev_rx_handler_register(real_dev
, macsec_handle_frame
,
3170 list_add_tail_rcu(&macsec
->secys
, &rxd
->secys
);
3174 static bool sci_exists(struct net_device
*dev
, sci_t sci
)
3176 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(dev
);
3177 struct macsec_dev
*macsec
;
3179 list_for_each_entry(macsec
, &rxd
->secys
, secys
) {
3180 if (macsec
->secy
.sci
== sci
)
3187 static sci_t
dev_to_sci(struct net_device
*dev
, __be16 port
)
3189 return make_sci(dev
->dev_addr
, port
);
3192 static int macsec_add_dev(struct net_device
*dev
, sci_t sci
, u8 icv_len
)
3194 struct macsec_dev
*macsec
= macsec_priv(dev
);
3195 struct macsec_secy
*secy
= &macsec
->secy
;
3197 macsec
->stats
= netdev_alloc_pcpu_stats(struct pcpu_secy_stats
);
3201 secy
->tx_sc
.stats
= netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats
);
3202 if (!secy
->tx_sc
.stats
) {
3203 free_percpu(macsec
->stats
);
3207 if (sci
== MACSEC_UNDEF_SCI
)
3208 sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
3211 secy
->operational
= true;
3212 secy
->key_len
= DEFAULT_SAK_LEN
;
3213 secy
->icv_len
= icv_len
;
3214 secy
->validate_frames
= MACSEC_VALIDATE_DEFAULT
;
3215 secy
->protect_frames
= true;
3216 secy
->replay_protect
= false;
3219 secy
->tx_sc
.active
= true;
3220 secy
->tx_sc
.encoding_sa
= DEFAULT_ENCODING_SA
;
3221 secy
->tx_sc
.encrypt
= DEFAULT_ENCRYPT
;
3222 secy
->tx_sc
.send_sci
= DEFAULT_SEND_SCI
;
3223 secy
->tx_sc
.end_station
= false;
3224 secy
->tx_sc
.scb
= false;
3229 static int macsec_newlink(struct net
*net
, struct net_device
*dev
,
3230 struct nlattr
*tb
[], struct nlattr
*data
[],
3231 struct netlink_ext_ack
*extack
)
3233 struct macsec_dev
*macsec
= macsec_priv(dev
);
3234 struct net_device
*real_dev
;
3237 u8 icv_len
= DEFAULT_ICV_LEN
;
3238 rx_handler_func_t
*rx_handler
;
3242 real_dev
= __dev_get_by_index(net
, nla_get_u32(tb
[IFLA_LINK
]));
3246 dev
->priv_flags
|= IFF_MACSEC
;
3248 macsec
->real_dev
= real_dev
;
3250 if (data
&& data
[IFLA_MACSEC_ICV_LEN
])
3251 icv_len
= nla_get_u8(data
[IFLA_MACSEC_ICV_LEN
]);
3252 dev
->mtu
= real_dev
->mtu
- icv_len
- macsec_extra_len(true);
3254 rx_handler
= rtnl_dereference(real_dev
->rx_handler
);
3255 if (rx_handler
&& rx_handler
!= macsec_handle_frame
)
3258 err
= register_netdevice(dev
);
3262 macsec
->nest_level
= dev_get_nest_level(real_dev
) + 1;
3263 netdev_lockdep_set_classes(dev
);
3264 lockdep_set_class_and_subclass(&dev
->addr_list_lock
,
3265 &macsec_netdev_addr_lock_key
,
3266 macsec_get_nest_level(dev
));
3268 err
= netdev_upper_dev_link(real_dev
, dev
, extack
);
3272 /* need to be already registered so that ->init has run and
3273 * the MAC addr is set
3275 if (data
&& data
[IFLA_MACSEC_SCI
])
3276 sci
= nla_get_sci(data
[IFLA_MACSEC_SCI
]);
3277 else if (data
&& data
[IFLA_MACSEC_PORT
])
3278 sci
= dev_to_sci(dev
, nla_get_be16(data
[IFLA_MACSEC_PORT
]));
3280 sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
3282 if (rx_handler
&& sci_exists(real_dev
, sci
)) {
3287 err
= macsec_add_dev(dev
, sci
, icv_len
);
3292 err
= macsec_changelink_common(dev
, data
);
3297 err
= register_macsec_dev(real_dev
, dev
);
3301 netif_stacked_transfer_operstate(real_dev
, dev
);
3302 linkwatch_fire_event(dev
);
3304 macsec_generation
++;
3309 macsec_del_dev(macsec
);
3311 netdev_upper_dev_unlink(real_dev
, dev
);
3313 unregister_netdevice(dev
);
3317 static int macsec_validate_attr(struct nlattr
*tb
[], struct nlattr
*data
[],
3318 struct netlink_ext_ack
*extack
)
3320 u64 csid
= MACSEC_DEFAULT_CIPHER_ID
;
3321 u8 icv_len
= DEFAULT_ICV_LEN
;
3328 if (data
[IFLA_MACSEC_CIPHER_SUITE
])
3329 csid
= nla_get_u64(data
[IFLA_MACSEC_CIPHER_SUITE
]);
3331 if (data
[IFLA_MACSEC_ICV_LEN
]) {
3332 icv_len
= nla_get_u8(data
[IFLA_MACSEC_ICV_LEN
]);
3333 if (icv_len
!= DEFAULT_ICV_LEN
) {
3334 char dummy_key
[DEFAULT_SAK_LEN
] = { 0 };
3335 struct crypto_aead
*dummy_tfm
;
3337 dummy_tfm
= macsec_alloc_tfm(dummy_key
,
3340 if (IS_ERR(dummy_tfm
))
3341 return PTR_ERR(dummy_tfm
);
3342 crypto_free_aead(dummy_tfm
);
3347 case MACSEC_CIPHER_ID_GCM_AES_128
:
3348 case MACSEC_CIPHER_ID_GCM_AES_256
:
3349 case MACSEC_DEFAULT_CIPHER_ID
:
3350 if (icv_len
< MACSEC_MIN_ICV_LEN
||
3351 icv_len
> MACSEC_STD_ICV_LEN
)
3358 if (data
[IFLA_MACSEC_ENCODING_SA
]) {
3359 if (nla_get_u8(data
[IFLA_MACSEC_ENCODING_SA
]) >= MACSEC_NUM_AN
)
3363 for (flag
= IFLA_MACSEC_ENCODING_SA
+ 1;
3364 flag
< IFLA_MACSEC_VALIDATION
;
3367 if (nla_get_u8(data
[flag
]) > 1)
3372 es
= data
[IFLA_MACSEC_ES
] ? nla_get_u8(data
[IFLA_MACSEC_ES
]) : false;
3373 sci
= data
[IFLA_MACSEC_INC_SCI
] ? nla_get_u8(data
[IFLA_MACSEC_INC_SCI
]) : false;
3374 scb
= data
[IFLA_MACSEC_SCB
] ? nla_get_u8(data
[IFLA_MACSEC_SCB
]) : false;
3376 if ((sci
&& (scb
|| es
)) || (scb
&& es
))
3379 if (data
[IFLA_MACSEC_VALIDATION
] &&
3380 nla_get_u8(data
[IFLA_MACSEC_VALIDATION
]) > MACSEC_VALIDATE_MAX
)
3383 if ((data
[IFLA_MACSEC_REPLAY_PROTECT
] &&
3384 nla_get_u8(data
[IFLA_MACSEC_REPLAY_PROTECT
])) &&
3385 !data
[IFLA_MACSEC_WINDOW
])
3391 static struct net
*macsec_get_link_net(const struct net_device
*dev
)
3393 return dev_net(macsec_priv(dev
)->real_dev
);
3396 static size_t macsec_get_size(const struct net_device
*dev
)
3398 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
3399 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
3400 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
3401 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
3402 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
3403 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
3404 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
3405 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
3406 nla_total_size(1) + /* IFLA_MACSEC_ES */
3407 nla_total_size(1) + /* IFLA_MACSEC_SCB */
3408 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
3409 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
3413 static int macsec_fill_info(struct sk_buff
*skb
,
3414 const struct net_device
*dev
)
3416 struct macsec_secy
*secy
= &macsec_priv(dev
)->secy
;
3417 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
3420 switch (secy
->key_len
) {
3421 case MACSEC_GCM_AES_128_SAK_LEN
:
3422 csid
= MACSEC_DEFAULT_CIPHER_ID
;
3424 case MACSEC_GCM_AES_256_SAK_LEN
:
3425 csid
= MACSEC_CIPHER_ID_GCM_AES_256
;
3428 goto nla_put_failure
;
3431 if (nla_put_sci(skb
, IFLA_MACSEC_SCI
, secy
->sci
,
3433 nla_put_u8(skb
, IFLA_MACSEC_ICV_LEN
, secy
->icv_len
) ||
3434 nla_put_u64_64bit(skb
, IFLA_MACSEC_CIPHER_SUITE
,
3435 csid
, IFLA_MACSEC_PAD
) ||
3436 nla_put_u8(skb
, IFLA_MACSEC_ENCODING_SA
, tx_sc
->encoding_sa
) ||
3437 nla_put_u8(skb
, IFLA_MACSEC_ENCRYPT
, tx_sc
->encrypt
) ||
3438 nla_put_u8(skb
, IFLA_MACSEC_PROTECT
, secy
->protect_frames
) ||
3439 nla_put_u8(skb
, IFLA_MACSEC_INC_SCI
, tx_sc
->send_sci
) ||
3440 nla_put_u8(skb
, IFLA_MACSEC_ES
, tx_sc
->end_station
) ||
3441 nla_put_u8(skb
, IFLA_MACSEC_SCB
, tx_sc
->scb
) ||
3442 nla_put_u8(skb
, IFLA_MACSEC_REPLAY_PROTECT
, secy
->replay_protect
) ||
3443 nla_put_u8(skb
, IFLA_MACSEC_VALIDATION
, secy
->validate_frames
) ||
3445 goto nla_put_failure
;
3447 if (secy
->replay_protect
) {
3448 if (nla_put_u32(skb
, IFLA_MACSEC_WINDOW
, secy
->replay_window
))
3449 goto nla_put_failure
;
3458 static struct rtnl_link_ops macsec_link_ops __read_mostly
= {
3460 .priv_size
= sizeof(struct macsec_dev
),
3461 .maxtype
= IFLA_MACSEC_MAX
,
3462 .policy
= macsec_rtnl_policy
,
3463 .setup
= macsec_setup
,
3464 .validate
= macsec_validate_attr
,
3465 .newlink
= macsec_newlink
,
3466 .changelink
= macsec_changelink
,
3467 .dellink
= macsec_dellink
,
3468 .get_size
= macsec_get_size
,
3469 .fill_info
= macsec_fill_info
,
3470 .get_link_net
= macsec_get_link_net
,
3473 static bool is_macsec_master(struct net_device
*dev
)
3475 return rcu_access_pointer(dev
->rx_handler
) == macsec_handle_frame
;
3478 static int macsec_notify(struct notifier_block
*this, unsigned long event
,
3481 struct net_device
*real_dev
= netdev_notifier_info_to_dev(ptr
);
3484 if (!is_macsec_master(real_dev
))
3490 case NETDEV_CHANGE
: {
3491 struct macsec_dev
*m
, *n
;
3492 struct macsec_rxh_data
*rxd
;
3494 rxd
= macsec_data_rtnl(real_dev
);
3495 list_for_each_entry_safe(m
, n
, &rxd
->secys
, secys
) {
3496 struct net_device
*dev
= m
->secy
.netdev
;
3498 netif_stacked_transfer_operstate(real_dev
, dev
);
3502 case NETDEV_UNREGISTER
: {
3503 struct macsec_dev
*m
, *n
;
3504 struct macsec_rxh_data
*rxd
;
3506 rxd
= macsec_data_rtnl(real_dev
);
3507 list_for_each_entry_safe(m
, n
, &rxd
->secys
, secys
) {
3508 macsec_common_dellink(m
->secy
.netdev
, &head
);
3511 netdev_rx_handler_unregister(real_dev
);
3514 unregister_netdevice_many(&head
);
3517 case NETDEV_CHANGEMTU
: {
3518 struct macsec_dev
*m
;
3519 struct macsec_rxh_data
*rxd
;
3521 rxd
= macsec_data_rtnl(real_dev
);
3522 list_for_each_entry(m
, &rxd
->secys
, secys
) {
3523 struct net_device
*dev
= m
->secy
.netdev
;
3524 unsigned int mtu
= real_dev
->mtu
- (m
->secy
.icv_len
+
3525 macsec_extra_len(true));
3528 dev_set_mtu(dev
, mtu
);
3536 static struct notifier_block macsec_notifier
= {
3537 .notifier_call
= macsec_notify
,
3540 static int __init
macsec_init(void)
3544 pr_info("MACsec IEEE 802.1AE\n");
3545 err
= register_netdevice_notifier(&macsec_notifier
);
3549 err
= rtnl_link_register(&macsec_link_ops
);
3553 err
= genl_register_family(&macsec_fam
);
3560 rtnl_link_unregister(&macsec_link_ops
);
3562 unregister_netdevice_notifier(&macsec_notifier
);
3566 static void __exit
macsec_exit(void)
3568 genl_unregister_family(&macsec_fam
);
3569 rtnl_link_unregister(&macsec_link_ops
);
3570 unregister_netdevice_notifier(&macsec_notifier
);
3574 module_init(macsec_init
);
3575 module_exit(macsec_exit
);
3577 MODULE_ALIAS_RTNL_LINK("macsec");
3578 MODULE_ALIAS_GENL_FAMILY("macsec");
3580 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
3581 MODULE_LICENSE("GPL v2");