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/netdevice.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/refcount.h>
17 #include <net/genetlink.h>
19 #include <net/gro_cells.h>
20 #include <net/macsec.h>
21 #include <linux/phy.h>
22 #include <linux/byteorder/generic.h>
23 #include <linux/if_arp.h>
25 #include <uapi/linux/if_macsec.h>
27 #define MACSEC_SCI_LEN 8
29 /* SecTAG length = macsec_eth_header without the optional SCI */
30 #define MACSEC_TAG_LEN 6
32 struct macsec_eth_header
{
36 #if defined(__LITTLE_ENDIAN_BITFIELD)
39 #elif defined(__BIG_ENDIAN_BITFIELD)
43 #error "Please fix <asm/byteorder.h>"
46 u8 secure_channel_id
[8]; /* optional */
49 #define MACSEC_TCI_VERSION 0x80
50 #define MACSEC_TCI_ES 0x40 /* end station */
51 #define MACSEC_TCI_SC 0x20 /* SCI present */
52 #define MACSEC_TCI_SCB 0x10 /* epon */
53 #define MACSEC_TCI_E 0x08 /* encryption */
54 #define MACSEC_TCI_C 0x04 /* changed text */
55 #define MACSEC_AN_MASK 0x03 /* association number */
56 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
58 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59 #define MIN_NON_SHORT_LEN 48
61 #define GCM_AES_IV_LEN 12
62 #define DEFAULT_ICV_LEN 16
64 #define for_each_rxsc(secy, sc) \
65 for (sc = rcu_dereference_bh(secy->rx_sc); \
67 sc = rcu_dereference_bh(sc->next))
68 #define for_each_rxsc_rtnl(secy, sc) \
69 for (sc = rtnl_dereference(secy->rx_sc); \
71 sc = rtnl_dereference(sc->next))
73 #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
77 u8 short_secure_channel_id
[4];
85 u8 secure_channel_id
[8];
91 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
93 struct pcpu_secy_stats
{
94 struct macsec_dev_stats stats
;
95 struct u64_stats_sync syncp
;
99 * struct macsec_dev - private data
101 * @real_dev: pointer to underlying netdevice
102 * @stats: MACsec device stats
103 * @secys: linked list of SecY's on the underlying device
104 * @offload: status of offloading on the MACsec device
107 struct macsec_secy secy
;
108 struct net_device
*real_dev
;
109 struct pcpu_secy_stats __percpu
*stats
;
110 struct list_head secys
;
111 struct gro_cells gro_cells
;
112 enum macsec_offload offload
;
116 * struct macsec_rxh_data - rx_handler private argument
117 * @secys: linked list of SecY's on this underlying device
119 struct macsec_rxh_data
{
120 struct list_head secys
;
123 static struct macsec_dev
*macsec_priv(const struct net_device
*dev
)
125 return (struct macsec_dev
*)netdev_priv(dev
);
128 static struct macsec_rxh_data
*macsec_data_rcu(const struct net_device
*dev
)
130 return rcu_dereference_bh(dev
->rx_handler_data
);
133 static struct macsec_rxh_data
*macsec_data_rtnl(const struct net_device
*dev
)
135 return rtnl_dereference(dev
->rx_handler_data
);
139 struct aead_request
*req
;
141 struct macsec_tx_sa
*tx_sa
;
142 struct macsec_rx_sa
*rx_sa
;
149 static struct macsec_rx_sa
*macsec_rxsa_get(struct macsec_rx_sa __rcu
*ptr
)
151 struct macsec_rx_sa
*sa
= rcu_dereference_bh(ptr
);
153 if (!sa
|| !sa
->active
)
156 if (!refcount_inc_not_zero(&sa
->refcnt
))
162 static void free_rx_sc_rcu(struct rcu_head
*head
)
164 struct macsec_rx_sc
*rx_sc
= container_of(head
, struct macsec_rx_sc
, rcu_head
);
166 free_percpu(rx_sc
->stats
);
170 static struct macsec_rx_sc
*macsec_rxsc_get(struct macsec_rx_sc
*sc
)
172 return refcount_inc_not_zero(&sc
->refcnt
) ? sc
: NULL
;
175 static void macsec_rxsc_put(struct macsec_rx_sc
*sc
)
177 if (refcount_dec_and_test(&sc
->refcnt
))
178 call_rcu(&sc
->rcu_head
, free_rx_sc_rcu
);
181 static void free_rxsa(struct rcu_head
*head
)
183 struct macsec_rx_sa
*sa
= container_of(head
, struct macsec_rx_sa
, rcu
);
185 crypto_free_aead(sa
->key
.tfm
);
186 free_percpu(sa
->stats
);
190 static void macsec_rxsa_put(struct macsec_rx_sa
*sa
)
192 if (refcount_dec_and_test(&sa
->refcnt
))
193 call_rcu(&sa
->rcu
, free_rxsa
);
196 static struct macsec_tx_sa
*macsec_txsa_get(struct macsec_tx_sa __rcu
*ptr
)
198 struct macsec_tx_sa
*sa
= rcu_dereference_bh(ptr
);
200 if (!sa
|| !sa
->active
)
203 if (!refcount_inc_not_zero(&sa
->refcnt
))
209 static void free_txsa(struct rcu_head
*head
)
211 struct macsec_tx_sa
*sa
= container_of(head
, struct macsec_tx_sa
, rcu
);
213 crypto_free_aead(sa
->key
.tfm
);
214 free_percpu(sa
->stats
);
218 static void macsec_txsa_put(struct macsec_tx_sa
*sa
)
220 if (refcount_dec_and_test(&sa
->refcnt
))
221 call_rcu(&sa
->rcu
, free_txsa
);
224 static struct macsec_cb
*macsec_skb_cb(struct sk_buff
*skb
)
226 BUILD_BUG_ON(sizeof(struct macsec_cb
) > sizeof(skb
->cb
));
227 return (struct macsec_cb
*)skb
->cb
;
230 #define MACSEC_PORT_ES (htons(0x0001))
231 #define MACSEC_PORT_SCB (0x0000)
232 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
233 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
235 #define MACSEC_GCM_AES_128_SAK_LEN 16
236 #define MACSEC_GCM_AES_256_SAK_LEN 32
238 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
239 #define DEFAULT_XPN false
240 #define DEFAULT_SEND_SCI true
241 #define DEFAULT_ENCRYPT false
242 #define DEFAULT_ENCODING_SA 0
244 static bool send_sci(const struct macsec_secy
*secy
)
246 const struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
248 return tx_sc
->send_sci
||
249 (secy
->n_rx_sc
> 1 && !tx_sc
->end_station
&& !tx_sc
->scb
);
252 static sci_t
make_sci(u8
*addr
, __be16 port
)
256 memcpy(&sci
, addr
, ETH_ALEN
);
257 memcpy(((char *)&sci
) + ETH_ALEN
, &port
, sizeof(port
));
262 static sci_t
macsec_frame_sci(struct macsec_eth_header
*hdr
, bool sci_present
)
267 memcpy(&sci
, hdr
->secure_channel_id
,
268 sizeof(hdr
->secure_channel_id
));
270 sci
= make_sci(hdr
->eth
.h_source
, MACSEC_PORT_ES
);
275 static unsigned int macsec_sectag_len(bool sci_present
)
277 return MACSEC_TAG_LEN
+ (sci_present
? MACSEC_SCI_LEN
: 0);
280 static unsigned int macsec_hdr_len(bool sci_present
)
282 return macsec_sectag_len(sci_present
) + ETH_HLEN
;
285 static unsigned int macsec_extra_len(bool sci_present
)
287 return macsec_sectag_len(sci_present
) + sizeof(__be16
);
290 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
291 static void macsec_fill_sectag(struct macsec_eth_header
*h
,
292 const struct macsec_secy
*secy
, u32 pn
,
295 const struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
297 memset(&h
->tci_an
, 0, macsec_sectag_len(sci_present
));
298 h
->eth
.h_proto
= htons(ETH_P_MACSEC
);
301 h
->tci_an
|= MACSEC_TCI_SC
;
302 memcpy(&h
->secure_channel_id
, &secy
->sci
,
303 sizeof(h
->secure_channel_id
));
305 if (tx_sc
->end_station
)
306 h
->tci_an
|= MACSEC_TCI_ES
;
308 h
->tci_an
|= MACSEC_TCI_SCB
;
311 h
->packet_number
= htonl(pn
);
313 /* with GCM, C/E clear for !encrypt, both set for encrypt */
315 h
->tci_an
|= MACSEC_TCI_CONFID
;
316 else if (secy
->icv_len
!= DEFAULT_ICV_LEN
)
317 h
->tci_an
|= MACSEC_TCI_C
;
319 h
->tci_an
|= tx_sc
->encoding_sa
;
322 static void macsec_set_shortlen(struct macsec_eth_header
*h
, size_t data_len
)
324 if (data_len
< MIN_NON_SHORT_LEN
)
325 h
->short_length
= data_len
;
328 /* Checks if a MACsec interface is being offloaded to an hardware engine */
329 static bool macsec_is_offloaded(struct macsec_dev
*macsec
)
331 if (macsec
->offload
== MACSEC_OFFLOAD_MAC
||
332 macsec
->offload
== MACSEC_OFFLOAD_PHY
)
338 /* Checks if underlying layers implement MACsec offloading functions. */
339 static bool macsec_check_offload(enum macsec_offload offload
,
340 struct macsec_dev
*macsec
)
342 if (!macsec
|| !macsec
->real_dev
)
345 if (offload
== MACSEC_OFFLOAD_PHY
)
346 return macsec
->real_dev
->phydev
&&
347 macsec
->real_dev
->phydev
->macsec_ops
;
348 else if (offload
== MACSEC_OFFLOAD_MAC
)
349 return macsec
->real_dev
->features
& NETIF_F_HW_MACSEC
&&
350 macsec
->real_dev
->macsec_ops
;
355 static const struct macsec_ops
*__macsec_get_ops(enum macsec_offload offload
,
356 struct macsec_dev
*macsec
,
357 struct macsec_context
*ctx
)
360 memset(ctx
, 0, sizeof(*ctx
));
361 ctx
->offload
= offload
;
363 if (offload
== MACSEC_OFFLOAD_PHY
)
364 ctx
->phydev
= macsec
->real_dev
->phydev
;
365 else if (offload
== MACSEC_OFFLOAD_MAC
)
366 ctx
->netdev
= macsec
->real_dev
;
369 if (offload
== MACSEC_OFFLOAD_PHY
)
370 return macsec
->real_dev
->phydev
->macsec_ops
;
372 return macsec
->real_dev
->macsec_ops
;
375 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
376 * context device reference if provided.
378 static const struct macsec_ops
*macsec_get_ops(struct macsec_dev
*macsec
,
379 struct macsec_context
*ctx
)
381 if (!macsec_check_offload(macsec
->offload
, macsec
))
384 return __macsec_get_ops(macsec
->offload
, macsec
, ctx
);
387 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
388 static bool macsec_validate_skb(struct sk_buff
*skb
, u16 icv_len
, bool xpn
)
390 struct macsec_eth_header
*h
= (struct macsec_eth_header
*)skb
->data
;
391 int len
= skb
->len
- 2 * ETH_ALEN
;
392 int extra_len
= macsec_extra_len(!!(h
->tci_an
& MACSEC_TCI_SC
)) + icv_len
;
394 /* a) It comprises at least 17 octets */
398 /* b) MACsec EtherType: already checked */
400 /* c) V bit is clear */
401 if (h
->tci_an
& MACSEC_TCI_VERSION
)
404 /* d) ES or SCB => !SC */
405 if ((h
->tci_an
& MACSEC_TCI_ES
|| h
->tci_an
& MACSEC_TCI_SCB
) &&
406 (h
->tci_an
& MACSEC_TCI_SC
))
409 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
413 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
414 if (!h
->packet_number
&& !xpn
)
417 /* length check, f) g) h) i) */
419 return len
== extra_len
+ h
->short_length
;
420 return len
>= extra_len
+ MIN_NON_SHORT_LEN
;
423 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
424 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
426 static void macsec_fill_iv_xpn(unsigned char *iv
, ssci_t ssci
, u64 pn
,
429 struct gcm_iv_xpn
*gcm_iv
= (struct gcm_iv_xpn
*)iv
;
431 gcm_iv
->ssci
= ssci
^ salt
.ssci
;
432 gcm_iv
->pn
= cpu_to_be64(pn
) ^ salt
.pn
;
435 static void macsec_fill_iv(unsigned char *iv
, sci_t sci
, u32 pn
)
437 struct gcm_iv
*gcm_iv
= (struct gcm_iv
*)iv
;
440 gcm_iv
->pn
= htonl(pn
);
443 static struct macsec_eth_header
*macsec_ethhdr(struct sk_buff
*skb
)
445 return (struct macsec_eth_header
*)skb_mac_header(skb
);
448 static sci_t
dev_to_sci(struct net_device
*dev
, __be16 port
)
450 return make_sci(dev
->dev_addr
, port
);
453 static void __macsec_pn_wrapped(struct macsec_secy
*secy
,
454 struct macsec_tx_sa
*tx_sa
)
456 pr_debug("PN wrapped, transitioning to !oper\n");
457 tx_sa
->active
= false;
458 if (secy
->protect_frames
)
459 secy
->operational
= false;
462 void macsec_pn_wrapped(struct macsec_secy
*secy
, struct macsec_tx_sa
*tx_sa
)
464 spin_lock_bh(&tx_sa
->lock
);
465 __macsec_pn_wrapped(secy
, tx_sa
);
466 spin_unlock_bh(&tx_sa
->lock
);
468 EXPORT_SYMBOL_GPL(macsec_pn_wrapped
);
470 static pn_t
tx_sa_update_pn(struct macsec_tx_sa
*tx_sa
,
471 struct macsec_secy
*secy
)
475 spin_lock_bh(&tx_sa
->lock
);
477 pn
= tx_sa
->next_pn_halves
;
481 tx_sa
->next_pn_halves
.lower
++;
483 if (tx_sa
->next_pn
== 0)
484 __macsec_pn_wrapped(secy
, tx_sa
);
485 spin_unlock_bh(&tx_sa
->lock
);
490 static void macsec_encrypt_finish(struct sk_buff
*skb
, struct net_device
*dev
)
492 struct macsec_dev
*macsec
= netdev_priv(dev
);
494 skb
->dev
= macsec
->real_dev
;
495 skb_reset_mac_header(skb
);
496 skb
->protocol
= eth_hdr(skb
)->h_proto
;
499 static void macsec_count_tx(struct sk_buff
*skb
, struct macsec_tx_sc
*tx_sc
,
500 struct macsec_tx_sa
*tx_sa
)
502 struct pcpu_tx_sc_stats
*txsc_stats
= this_cpu_ptr(tx_sc
->stats
);
504 u64_stats_update_begin(&txsc_stats
->syncp
);
505 if (tx_sc
->encrypt
) {
506 txsc_stats
->stats
.OutOctetsEncrypted
+= skb
->len
;
507 txsc_stats
->stats
.OutPktsEncrypted
++;
508 this_cpu_inc(tx_sa
->stats
->OutPktsEncrypted
);
510 txsc_stats
->stats
.OutOctetsProtected
+= skb
->len
;
511 txsc_stats
->stats
.OutPktsProtected
++;
512 this_cpu_inc(tx_sa
->stats
->OutPktsProtected
);
514 u64_stats_update_end(&txsc_stats
->syncp
);
517 static void count_tx(struct net_device
*dev
, int ret
, int len
)
519 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
520 struct pcpu_sw_netstats
*stats
= this_cpu_ptr(dev
->tstats
);
522 u64_stats_update_begin(&stats
->syncp
);
524 stats
->tx_bytes
+= len
;
525 u64_stats_update_end(&stats
->syncp
);
529 static void macsec_encrypt_done(struct crypto_async_request
*base
, int err
)
531 struct sk_buff
*skb
= base
->data
;
532 struct net_device
*dev
= skb
->dev
;
533 struct macsec_dev
*macsec
= macsec_priv(dev
);
534 struct macsec_tx_sa
*sa
= macsec_skb_cb(skb
)->tx_sa
;
537 aead_request_free(macsec_skb_cb(skb
)->req
);
540 macsec_encrypt_finish(skb
, dev
);
541 macsec_count_tx(skb
, &macsec
->secy
.tx_sc
, macsec_skb_cb(skb
)->tx_sa
);
543 ret
= dev_queue_xmit(skb
);
544 count_tx(dev
, ret
, len
);
545 rcu_read_unlock_bh();
551 static struct aead_request
*macsec_alloc_req(struct crypto_aead
*tfm
,
553 struct scatterlist
**sg
,
556 size_t size
, iv_offset
, sg_offset
;
557 struct aead_request
*req
;
560 size
= sizeof(struct aead_request
) + crypto_aead_reqsize(tfm
);
562 size
+= GCM_AES_IV_LEN
;
564 size
= ALIGN(size
, __alignof__(struct scatterlist
));
566 size
+= sizeof(struct scatterlist
) * num_frags
;
568 tmp
= kmalloc(size
, GFP_ATOMIC
);
572 *iv
= (unsigned char *)(tmp
+ iv_offset
);
573 *sg
= (struct scatterlist
*)(tmp
+ sg_offset
);
576 aead_request_set_tfm(req
, tfm
);
581 static struct sk_buff
*macsec_encrypt(struct sk_buff
*skb
,
582 struct net_device
*dev
)
585 struct scatterlist
*sg
;
586 struct sk_buff
*trailer
;
589 struct macsec_eth_header
*hh
;
590 size_t unprotected_len
;
591 struct aead_request
*req
;
592 struct macsec_secy
*secy
;
593 struct macsec_tx_sc
*tx_sc
;
594 struct macsec_tx_sa
*tx_sa
;
595 struct macsec_dev
*macsec
= macsec_priv(dev
);
599 secy
= &macsec
->secy
;
600 tx_sc
= &secy
->tx_sc
;
602 /* 10.5.1 TX SA assignment */
603 tx_sa
= macsec_txsa_get(tx_sc
->sa
[tx_sc
->encoding_sa
]);
605 secy
->operational
= false;
607 return ERR_PTR(-EINVAL
);
610 if (unlikely(skb_headroom(skb
) < MACSEC_NEEDED_HEADROOM
||
611 skb_tailroom(skb
) < MACSEC_NEEDED_TAILROOM
)) {
612 struct sk_buff
*nskb
= skb_copy_expand(skb
,
613 MACSEC_NEEDED_HEADROOM
,
614 MACSEC_NEEDED_TAILROOM
,
620 macsec_txsa_put(tx_sa
);
622 return ERR_PTR(-ENOMEM
);
625 skb
= skb_unshare(skb
, GFP_ATOMIC
);
627 macsec_txsa_put(tx_sa
);
628 return ERR_PTR(-ENOMEM
);
632 unprotected_len
= skb
->len
;
634 sci_present
= send_sci(secy
);
635 hh
= skb_push(skb
, macsec_extra_len(sci_present
));
636 memmove(hh
, eth
, 2 * ETH_ALEN
);
638 pn
= tx_sa_update_pn(tx_sa
, secy
);
639 if (pn
.full64
== 0) {
640 macsec_txsa_put(tx_sa
);
642 return ERR_PTR(-ENOLINK
);
644 macsec_fill_sectag(hh
, secy
, pn
.lower
, sci_present
);
645 macsec_set_shortlen(hh
, unprotected_len
- 2 * ETH_ALEN
);
647 skb_put(skb
, secy
->icv_len
);
649 if (skb
->len
- ETH_HLEN
> macsec_priv(dev
)->real_dev
->mtu
) {
650 struct pcpu_secy_stats
*secy_stats
= this_cpu_ptr(macsec
->stats
);
652 u64_stats_update_begin(&secy_stats
->syncp
);
653 secy_stats
->stats
.OutPktsTooLong
++;
654 u64_stats_update_end(&secy_stats
->syncp
);
656 macsec_txsa_put(tx_sa
);
658 return ERR_PTR(-EINVAL
);
661 ret
= skb_cow_data(skb
, 0, &trailer
);
662 if (unlikely(ret
< 0)) {
663 macsec_txsa_put(tx_sa
);
668 req
= macsec_alloc_req(tx_sa
->key
.tfm
, &iv
, &sg
, ret
);
670 macsec_txsa_put(tx_sa
);
672 return ERR_PTR(-ENOMEM
);
676 macsec_fill_iv_xpn(iv
, tx_sa
->ssci
, pn
.full64
, tx_sa
->key
.salt
);
678 macsec_fill_iv(iv
, secy
->sci
, pn
.lower
);
680 sg_init_table(sg
, ret
);
681 ret
= skb_to_sgvec(skb
, sg
, 0, skb
->len
);
682 if (unlikely(ret
< 0)) {
683 aead_request_free(req
);
684 macsec_txsa_put(tx_sa
);
689 if (tx_sc
->encrypt
) {
690 int len
= skb
->len
- macsec_hdr_len(sci_present
) -
692 aead_request_set_crypt(req
, sg
, sg
, len
, iv
);
693 aead_request_set_ad(req
, macsec_hdr_len(sci_present
));
695 aead_request_set_crypt(req
, sg
, sg
, 0, iv
);
696 aead_request_set_ad(req
, skb
->len
- secy
->icv_len
);
699 macsec_skb_cb(skb
)->req
= req
;
700 macsec_skb_cb(skb
)->tx_sa
= tx_sa
;
701 aead_request_set_callback(req
, 0, macsec_encrypt_done
, skb
);
704 ret
= crypto_aead_encrypt(req
);
705 if (ret
== -EINPROGRESS
) {
707 } else if (ret
!= 0) {
710 aead_request_free(req
);
711 macsec_txsa_put(tx_sa
);
712 return ERR_PTR(-EINVAL
);
716 aead_request_free(req
);
717 macsec_txsa_put(tx_sa
);
722 static bool macsec_post_decrypt(struct sk_buff
*skb
, struct macsec_secy
*secy
, u32 pn
)
724 struct macsec_rx_sa
*rx_sa
= macsec_skb_cb(skb
)->rx_sa
;
725 struct pcpu_rx_sc_stats
*rxsc_stats
= this_cpu_ptr(rx_sa
->sc
->stats
);
726 struct macsec_eth_header
*hdr
= macsec_ethhdr(skb
);
729 spin_lock(&rx_sa
->lock
);
730 if (rx_sa
->next_pn_halves
.lower
>= secy
->replay_window
)
731 lowest_pn
= rx_sa
->next_pn_halves
.lower
- secy
->replay_window
;
733 /* Now perform replay protection check again
734 * (see IEEE 802.1AE-2006 figure 10-5)
736 if (secy
->replay_protect
&& pn
< lowest_pn
&&
737 (!secy
->xpn
|| pn_same_half(pn
, lowest_pn
))) {
738 spin_unlock(&rx_sa
->lock
);
739 u64_stats_update_begin(&rxsc_stats
->syncp
);
740 rxsc_stats
->stats
.InPktsLate
++;
741 u64_stats_update_end(&rxsc_stats
->syncp
);
745 if (secy
->validate_frames
!= MACSEC_VALIDATE_DISABLED
) {
746 u64_stats_update_begin(&rxsc_stats
->syncp
);
747 if (hdr
->tci_an
& MACSEC_TCI_E
)
748 rxsc_stats
->stats
.InOctetsDecrypted
+= skb
->len
;
750 rxsc_stats
->stats
.InOctetsValidated
+= skb
->len
;
751 u64_stats_update_end(&rxsc_stats
->syncp
);
754 if (!macsec_skb_cb(skb
)->valid
) {
755 spin_unlock(&rx_sa
->lock
);
758 if (hdr
->tci_an
& MACSEC_TCI_C
||
759 secy
->validate_frames
== MACSEC_VALIDATE_STRICT
) {
760 u64_stats_update_begin(&rxsc_stats
->syncp
);
761 rxsc_stats
->stats
.InPktsNotValid
++;
762 u64_stats_update_end(&rxsc_stats
->syncp
);
766 u64_stats_update_begin(&rxsc_stats
->syncp
);
767 if (secy
->validate_frames
== MACSEC_VALIDATE_CHECK
) {
768 rxsc_stats
->stats
.InPktsInvalid
++;
769 this_cpu_inc(rx_sa
->stats
->InPktsInvalid
);
770 } else if (pn
< lowest_pn
) {
771 rxsc_stats
->stats
.InPktsDelayed
++;
773 rxsc_stats
->stats
.InPktsUnchecked
++;
775 u64_stats_update_end(&rxsc_stats
->syncp
);
777 u64_stats_update_begin(&rxsc_stats
->syncp
);
778 if (pn
< lowest_pn
) {
779 rxsc_stats
->stats
.InPktsDelayed
++;
781 rxsc_stats
->stats
.InPktsOK
++;
782 this_cpu_inc(rx_sa
->stats
->InPktsOK
);
784 u64_stats_update_end(&rxsc_stats
->syncp
);
786 // Instead of "pn >=" - to support pn overflow in xpn
787 if (pn
+ 1 > rx_sa
->next_pn_halves
.lower
) {
788 rx_sa
->next_pn_halves
.lower
= pn
+ 1;
789 } else if (secy
->xpn
&&
790 !pn_same_half(pn
, rx_sa
->next_pn_halves
.lower
)) {
791 rx_sa
->next_pn_halves
.upper
++;
792 rx_sa
->next_pn_halves
.lower
= 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 skb
->ip_summed
= CHECKSUM_NONE
;
815 memmove(skb
->data
+ hdr_len
, skb
->data
, 2 * ETH_ALEN
);
816 skb_pull(skb
, hdr_len
);
817 pskb_trim_unique(skb
, skb
->len
- icv_len
);
820 static void count_rx(struct net_device
*dev
, int len
)
822 struct pcpu_sw_netstats
*stats
= this_cpu_ptr(dev
->tstats
);
824 u64_stats_update_begin(&stats
->syncp
);
826 stats
->rx_bytes
+= len
;
827 u64_stats_update_end(&stats
->syncp
);
830 static void macsec_decrypt_done(struct crypto_async_request
*base
, int err
)
832 struct sk_buff
*skb
= base
->data
;
833 struct net_device
*dev
= skb
->dev
;
834 struct macsec_dev
*macsec
= macsec_priv(dev
);
835 struct macsec_rx_sa
*rx_sa
= macsec_skb_cb(skb
)->rx_sa
;
836 struct macsec_rx_sc
*rx_sc
= rx_sa
->sc
;
840 aead_request_free(macsec_skb_cb(skb
)->req
);
843 macsec_skb_cb(skb
)->valid
= true;
846 pn
= ntohl(macsec_ethhdr(skb
)->packet_number
);
847 if (!macsec_post_decrypt(skb
, &macsec
->secy
, pn
)) {
848 rcu_read_unlock_bh();
853 macsec_finalize_skb(skb
, macsec
->secy
.icv_len
,
854 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
855 macsec_reset_skb(skb
, macsec
->secy
.netdev
);
858 if (gro_cells_receive(&macsec
->gro_cells
, skb
) == NET_RX_SUCCESS
)
861 rcu_read_unlock_bh();
864 macsec_rxsa_put(rx_sa
);
865 macsec_rxsc_put(rx_sc
);
869 static struct sk_buff
*macsec_decrypt(struct sk_buff
*skb
,
870 struct net_device
*dev
,
871 struct macsec_rx_sa
*rx_sa
,
873 struct macsec_secy
*secy
)
876 struct scatterlist
*sg
;
877 struct sk_buff
*trailer
;
879 struct aead_request
*req
;
880 struct macsec_eth_header
*hdr
;
882 u16 icv_len
= secy
->icv_len
;
884 macsec_skb_cb(skb
)->valid
= false;
885 skb
= skb_share_check(skb
, GFP_ATOMIC
);
887 return ERR_PTR(-ENOMEM
);
889 ret
= skb_cow_data(skb
, 0, &trailer
);
890 if (unlikely(ret
< 0)) {
894 req
= macsec_alloc_req(rx_sa
->key
.tfm
, &iv
, &sg
, ret
);
897 return ERR_PTR(-ENOMEM
);
900 hdr
= (struct macsec_eth_header
*)skb
->data
;
901 hdr_pn
= ntohl(hdr
->packet_number
);
904 pn_t recovered_pn
= rx_sa
->next_pn_halves
;
906 recovered_pn
.lower
= hdr_pn
;
907 if (hdr_pn
< rx_sa
->next_pn_halves
.lower
&&
908 !pn_same_half(hdr_pn
, rx_sa
->next_pn_halves
.lower
))
909 recovered_pn
.upper
++;
911 macsec_fill_iv_xpn(iv
, rx_sa
->ssci
, recovered_pn
.full64
,
914 macsec_fill_iv(iv
, sci
, hdr_pn
);
917 sg_init_table(sg
, ret
);
918 ret
= skb_to_sgvec(skb
, sg
, 0, skb
->len
);
919 if (unlikely(ret
< 0)) {
920 aead_request_free(req
);
925 if (hdr
->tci_an
& MACSEC_TCI_E
) {
926 /* confidentiality: ethernet + macsec header
927 * authenticated, encrypted payload
929 int len
= skb
->len
- macsec_hdr_len(macsec_skb_cb(skb
)->has_sci
);
931 aead_request_set_crypt(req
, sg
, sg
, len
, iv
);
932 aead_request_set_ad(req
, macsec_hdr_len(macsec_skb_cb(skb
)->has_sci
));
933 skb
= skb_unshare(skb
, GFP_ATOMIC
);
935 aead_request_free(req
);
936 return ERR_PTR(-ENOMEM
);
939 /* integrity only: all headers + data authenticated */
940 aead_request_set_crypt(req
, sg
, sg
, icv_len
, iv
);
941 aead_request_set_ad(req
, skb
->len
- icv_len
);
944 macsec_skb_cb(skb
)->req
= req
;
946 aead_request_set_callback(req
, 0, macsec_decrypt_done
, skb
);
949 ret
= crypto_aead_decrypt(req
);
950 if (ret
== -EINPROGRESS
) {
952 } else if (ret
!= 0) {
953 /* decryption/authentication failed
954 * 10.6 if validateFrames is disabled, deliver anyway
956 if (ret
!= -EBADMSG
) {
961 macsec_skb_cb(skb
)->valid
= true;
965 aead_request_free(req
);
970 static struct macsec_rx_sc
*find_rx_sc(struct macsec_secy
*secy
, sci_t sci
)
972 struct macsec_rx_sc
*rx_sc
;
974 for_each_rxsc(secy
, rx_sc
) {
975 if (rx_sc
->sci
== sci
)
982 static struct macsec_rx_sc
*find_rx_sc_rtnl(struct macsec_secy
*secy
, sci_t sci
)
984 struct macsec_rx_sc
*rx_sc
;
986 for_each_rxsc_rtnl(secy
, rx_sc
) {
987 if (rx_sc
->sci
== sci
)
994 static enum rx_handler_result
handle_not_macsec(struct sk_buff
*skb
)
996 /* Deliver to the uncontrolled port by default */
997 enum rx_handler_result ret
= RX_HANDLER_PASS
;
998 struct ethhdr
*hdr
= eth_hdr(skb
);
999 struct macsec_rxh_data
*rxd
;
1000 struct macsec_dev
*macsec
;
1003 rxd
= macsec_data_rcu(skb
->dev
);
1005 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
1006 struct sk_buff
*nskb
;
1007 struct pcpu_secy_stats
*secy_stats
= this_cpu_ptr(macsec
->stats
);
1008 struct net_device
*ndev
= macsec
->secy
.netdev
;
1010 /* If h/w offloading is enabled, HW decodes frames and strips
1011 * the SecTAG, so we have to deduce which port to deliver to.
1013 if (macsec_is_offloaded(macsec
) && netif_running(ndev
)) {
1014 if (ether_addr_equal_64bits(hdr
->h_dest
,
1016 /* exact match, divert skb to this port */
1018 skb
->pkt_type
= PACKET_HOST
;
1019 ret
= RX_HANDLER_ANOTHER
;
1021 } else if (is_multicast_ether_addr_64bits(
1023 /* multicast frame, deliver on this port too */
1024 nskb
= skb_clone(skb
, GFP_ATOMIC
);
1029 if (ether_addr_equal_64bits(hdr
->h_dest
,
1031 nskb
->pkt_type
= PACKET_BROADCAST
;
1033 nskb
->pkt_type
= PACKET_MULTICAST
;
1040 /* 10.6 If the management control validateFrames is not
1041 * Strict, frames without a SecTAG are received, counted, and
1042 * delivered to the Controlled Port
1044 if (macsec
->secy
.validate_frames
== MACSEC_VALIDATE_STRICT
) {
1045 u64_stats_update_begin(&secy_stats
->syncp
);
1046 secy_stats
->stats
.InPktsNoTag
++;
1047 u64_stats_update_end(&secy_stats
->syncp
);
1051 /* deliver on this port */
1052 nskb
= skb_clone(skb
, GFP_ATOMIC
);
1058 if (netif_rx(nskb
) == NET_RX_SUCCESS
) {
1059 u64_stats_update_begin(&secy_stats
->syncp
);
1060 secy_stats
->stats
.InPktsUntagged
++;
1061 u64_stats_update_end(&secy_stats
->syncp
);
1070 static rx_handler_result_t
macsec_handle_frame(struct sk_buff
**pskb
)
1072 struct sk_buff
*skb
= *pskb
;
1073 struct net_device
*dev
= skb
->dev
;
1074 struct macsec_eth_header
*hdr
;
1075 struct macsec_secy
*secy
= NULL
;
1076 struct macsec_rx_sc
*rx_sc
;
1077 struct macsec_rx_sa
*rx_sa
;
1078 struct macsec_rxh_data
*rxd
;
1079 struct macsec_dev
*macsec
;
1084 struct pcpu_rx_sc_stats
*rxsc_stats
;
1085 struct pcpu_secy_stats
*secy_stats
;
1089 if (skb_headroom(skb
) < ETH_HLEN
)
1092 hdr
= macsec_ethhdr(skb
);
1093 if (hdr
->eth
.h_proto
!= htons(ETH_P_MACSEC
))
1094 return handle_not_macsec(skb
);
1096 skb
= skb_unshare(skb
, GFP_ATOMIC
);
1099 return RX_HANDLER_CONSUMED
;
1101 pulled_sci
= pskb_may_pull(skb
, macsec_extra_len(true));
1103 if (!pskb_may_pull(skb
, macsec_extra_len(false)))
1107 hdr
= macsec_ethhdr(skb
);
1109 /* Frames with a SecTAG that has the TCI E bit set but the C
1110 * bit clear are discarded, as this reserved encoding is used
1111 * to identify frames with a SecTAG that are not to be
1112 * delivered to the Controlled Port.
1114 if ((hdr
->tci_an
& (MACSEC_TCI_C
| MACSEC_TCI_E
)) == MACSEC_TCI_E
)
1115 return RX_HANDLER_PASS
;
1117 /* now, pull the extra length */
1118 if (hdr
->tci_an
& MACSEC_TCI_SC
) {
1123 /* ethernet header is part of crypto processing */
1124 skb_push(skb
, ETH_HLEN
);
1126 macsec_skb_cb(skb
)->has_sci
= !!(hdr
->tci_an
& MACSEC_TCI_SC
);
1127 macsec_skb_cb(skb
)->assoc_num
= hdr
->tci_an
& MACSEC_AN_MASK
;
1128 sci
= macsec_frame_sci(hdr
, macsec_skb_cb(skb
)->has_sci
);
1131 rxd
= macsec_data_rcu(skb
->dev
);
1133 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
1134 struct macsec_rx_sc
*sc
= find_rx_sc(&macsec
->secy
, sci
);
1136 sc
= sc
? macsec_rxsc_get(sc
) : NULL
;
1139 secy
= &macsec
->secy
;
1149 macsec
= macsec_priv(dev
);
1150 secy_stats
= this_cpu_ptr(macsec
->stats
);
1151 rxsc_stats
= this_cpu_ptr(rx_sc
->stats
);
1153 if (!macsec_validate_skb(skb
, secy
->icv_len
, secy
->xpn
)) {
1154 u64_stats_update_begin(&secy_stats
->syncp
);
1155 secy_stats
->stats
.InPktsBadTag
++;
1156 u64_stats_update_end(&secy_stats
->syncp
);
1160 rx_sa
= macsec_rxsa_get(rx_sc
->sa
[macsec_skb_cb(skb
)->assoc_num
]);
1162 /* 10.6.1 if the SA is not in use */
1164 /* If validateFrames is Strict or the C bit in the
1165 * SecTAG is set, discard
1167 if (hdr
->tci_an
& MACSEC_TCI_C
||
1168 secy
->validate_frames
== MACSEC_VALIDATE_STRICT
) {
1169 u64_stats_update_begin(&rxsc_stats
->syncp
);
1170 rxsc_stats
->stats
.InPktsNotUsingSA
++;
1171 u64_stats_update_end(&rxsc_stats
->syncp
);
1175 /* not Strict, the frame (with the SecTAG and ICV
1176 * removed) is delivered to the Controlled Port.
1178 u64_stats_update_begin(&rxsc_stats
->syncp
);
1179 rxsc_stats
->stats
.InPktsUnusedSA
++;
1180 u64_stats_update_end(&rxsc_stats
->syncp
);
1184 /* First, PN check to avoid decrypting obviously wrong packets */
1185 hdr_pn
= ntohl(hdr
->packet_number
);
1186 if (secy
->replay_protect
) {
1189 spin_lock(&rx_sa
->lock
);
1190 late
= rx_sa
->next_pn_halves
.lower
>= secy
->replay_window
&&
1191 hdr_pn
< (rx_sa
->next_pn_halves
.lower
- secy
->replay_window
);
1194 late
= late
&& pn_same_half(rx_sa
->next_pn_halves
.lower
, hdr_pn
);
1195 spin_unlock(&rx_sa
->lock
);
1198 u64_stats_update_begin(&rxsc_stats
->syncp
);
1199 rxsc_stats
->stats
.InPktsLate
++;
1200 u64_stats_update_end(&rxsc_stats
->syncp
);
1205 macsec_skb_cb(skb
)->rx_sa
= rx_sa
;
1207 /* Disabled && !changed text => skip validation */
1208 if (hdr
->tci_an
& MACSEC_TCI_C
||
1209 secy
->validate_frames
!= MACSEC_VALIDATE_DISABLED
)
1210 skb
= macsec_decrypt(skb
, dev
, rx_sa
, sci
, secy
);
1213 /* the decrypt callback needs the reference */
1214 if (PTR_ERR(skb
) != -EINPROGRESS
) {
1215 macsec_rxsa_put(rx_sa
);
1216 macsec_rxsc_put(rx_sc
);
1220 return RX_HANDLER_CONSUMED
;
1223 if (!macsec_post_decrypt(skb
, secy
, hdr_pn
))
1227 macsec_finalize_skb(skb
, secy
->icv_len
,
1228 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
1229 macsec_reset_skb(skb
, secy
->netdev
);
1232 macsec_rxsa_put(rx_sa
);
1233 macsec_rxsc_put(rx_sc
);
1237 ret
= gro_cells_receive(&macsec
->gro_cells
, skb
);
1238 if (ret
== NET_RX_SUCCESS
)
1241 macsec
->secy
.netdev
->stats
.rx_dropped
++;
1246 return RX_HANDLER_CONSUMED
;
1249 macsec_rxsa_put(rx_sa
);
1251 macsec_rxsc_put(rx_sc
);
1256 return RX_HANDLER_CONSUMED
;
1259 /* 10.6.1 if the SC is not found */
1260 cbit
= !!(hdr
->tci_an
& MACSEC_TCI_C
);
1262 macsec_finalize_skb(skb
, DEFAULT_ICV_LEN
,
1263 macsec_extra_len(macsec_skb_cb(skb
)->has_sci
));
1265 list_for_each_entry_rcu(macsec
, &rxd
->secys
, secys
) {
1266 struct sk_buff
*nskb
;
1268 secy_stats
= this_cpu_ptr(macsec
->stats
);
1270 /* If validateFrames is Strict or the C bit in the
1271 * SecTAG is set, discard
1274 macsec
->secy
.validate_frames
== MACSEC_VALIDATE_STRICT
) {
1275 u64_stats_update_begin(&secy_stats
->syncp
);
1276 secy_stats
->stats
.InPktsNoSCI
++;
1277 u64_stats_update_end(&secy_stats
->syncp
);
1281 /* not strict, the frame (with the SecTAG and ICV
1282 * removed) is delivered to the Controlled Port.
1284 nskb
= skb_clone(skb
, GFP_ATOMIC
);
1288 macsec_reset_skb(nskb
, macsec
->secy
.netdev
);
1290 ret
= netif_rx(nskb
);
1291 if (ret
== NET_RX_SUCCESS
) {
1292 u64_stats_update_begin(&secy_stats
->syncp
);
1293 secy_stats
->stats
.InPktsUnknownSCI
++;
1294 u64_stats_update_end(&secy_stats
->syncp
);
1296 macsec
->secy
.netdev
->stats
.rx_dropped
++;
1302 return RX_HANDLER_PASS
;
1305 static struct crypto_aead
*macsec_alloc_tfm(char *key
, int key_len
, int icv_len
)
1307 struct crypto_aead
*tfm
;
1310 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1311 tfm
= crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC
);
1316 ret
= crypto_aead_setkey(tfm
, key
, key_len
);
1320 ret
= crypto_aead_setauthsize(tfm
, icv_len
);
1326 crypto_free_aead(tfm
);
1327 return ERR_PTR(ret
);
1330 static int init_rx_sa(struct macsec_rx_sa
*rx_sa
, char *sak
, int key_len
,
1333 rx_sa
->stats
= alloc_percpu(struct macsec_rx_sa_stats
);
1337 rx_sa
->key
.tfm
= macsec_alloc_tfm(sak
, key_len
, icv_len
);
1338 if (IS_ERR(rx_sa
->key
.tfm
)) {
1339 free_percpu(rx_sa
->stats
);
1340 return PTR_ERR(rx_sa
->key
.tfm
);
1343 rx_sa
->ssci
= MACSEC_UNDEF_SSCI
;
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
->ssci
= MACSEC_UNDEF_SSCI
;
1443 tx_sa
->active
= false;
1444 refcount_set(&tx_sa
->refcnt
, 1);
1445 spin_lock_init(&tx_sa
->lock
);
1450 static void clear_tx_sa(struct macsec_tx_sa
*tx_sa
)
1452 tx_sa
->active
= false;
1454 macsec_txsa_put(tx_sa
);
1457 static struct genl_family macsec_fam
;
1459 static struct net_device
*get_dev_from_nl(struct net
*net
,
1460 struct nlattr
**attrs
)
1462 int ifindex
= nla_get_u32(attrs
[MACSEC_ATTR_IFINDEX
]);
1463 struct net_device
*dev
;
1465 dev
= __dev_get_by_index(net
, ifindex
);
1467 return ERR_PTR(-ENODEV
);
1469 if (!netif_is_macsec(dev
))
1470 return ERR_PTR(-ENODEV
);
1475 static enum macsec_offload
nla_get_offload(const struct nlattr
*nla
)
1477 return (__force
enum macsec_offload
)nla_get_u8(nla
);
1480 static sci_t
nla_get_sci(const struct nlattr
*nla
)
1482 return (__force sci_t
)nla_get_u64(nla
);
1485 static int nla_put_sci(struct sk_buff
*skb
, int attrtype
, sci_t value
,
1488 return nla_put_u64_64bit(skb
, attrtype
, (__force u64
)value
, padattr
);
1491 static ssci_t
nla_get_ssci(const struct nlattr
*nla
)
1493 return (__force ssci_t
)nla_get_u32(nla
);
1496 static int nla_put_ssci(struct sk_buff
*skb
, int attrtype
, ssci_t value
)
1498 return nla_put_u32(skb
, attrtype
, (__force u64
)value
);
1501 static struct macsec_tx_sa
*get_txsa_from_nl(struct net
*net
,
1502 struct nlattr
**attrs
,
1503 struct nlattr
**tb_sa
,
1504 struct net_device
**devp
,
1505 struct macsec_secy
**secyp
,
1506 struct macsec_tx_sc
**scp
,
1509 struct net_device
*dev
;
1510 struct macsec_secy
*secy
;
1511 struct macsec_tx_sc
*tx_sc
;
1512 struct macsec_tx_sa
*tx_sa
;
1514 if (!tb_sa
[MACSEC_SA_ATTR_AN
])
1515 return ERR_PTR(-EINVAL
);
1517 *assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1519 dev
= get_dev_from_nl(net
, attrs
);
1521 return ERR_CAST(dev
);
1523 if (*assoc_num
>= MACSEC_NUM_AN
)
1524 return ERR_PTR(-EINVAL
);
1526 secy
= &macsec_priv(dev
)->secy
;
1527 tx_sc
= &secy
->tx_sc
;
1529 tx_sa
= rtnl_dereference(tx_sc
->sa
[*assoc_num
]);
1531 return ERR_PTR(-ENODEV
);
1539 static struct macsec_rx_sc
*get_rxsc_from_nl(struct net
*net
,
1540 struct nlattr
**attrs
,
1541 struct nlattr
**tb_rxsc
,
1542 struct net_device
**devp
,
1543 struct macsec_secy
**secyp
)
1545 struct net_device
*dev
;
1546 struct macsec_secy
*secy
;
1547 struct macsec_rx_sc
*rx_sc
;
1550 dev
= get_dev_from_nl(net
, attrs
);
1552 return ERR_CAST(dev
);
1554 secy
= &macsec_priv(dev
)->secy
;
1556 if (!tb_rxsc
[MACSEC_RXSC_ATTR_SCI
])
1557 return ERR_PTR(-EINVAL
);
1559 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1560 rx_sc
= find_rx_sc_rtnl(secy
, sci
);
1562 return ERR_PTR(-ENODEV
);
1570 static struct macsec_rx_sa
*get_rxsa_from_nl(struct net
*net
,
1571 struct nlattr
**attrs
,
1572 struct nlattr
**tb_rxsc
,
1573 struct nlattr
**tb_sa
,
1574 struct net_device
**devp
,
1575 struct macsec_secy
**secyp
,
1576 struct macsec_rx_sc
**scp
,
1579 struct macsec_rx_sc
*rx_sc
;
1580 struct macsec_rx_sa
*rx_sa
;
1582 if (!tb_sa
[MACSEC_SA_ATTR_AN
])
1583 return ERR_PTR(-EINVAL
);
1585 *assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1586 if (*assoc_num
>= MACSEC_NUM_AN
)
1587 return ERR_PTR(-EINVAL
);
1589 rx_sc
= get_rxsc_from_nl(net
, attrs
, tb_rxsc
, devp
, secyp
);
1591 return ERR_CAST(rx_sc
);
1593 rx_sa
= rtnl_dereference(rx_sc
->sa
[*assoc_num
]);
1595 return ERR_PTR(-ENODEV
);
1601 static const struct nla_policy macsec_genl_policy
[NUM_MACSEC_ATTR
] = {
1602 [MACSEC_ATTR_IFINDEX
] = { .type
= NLA_U32
},
1603 [MACSEC_ATTR_RXSC_CONFIG
] = { .type
= NLA_NESTED
},
1604 [MACSEC_ATTR_SA_CONFIG
] = { .type
= NLA_NESTED
},
1605 [MACSEC_ATTR_OFFLOAD
] = { .type
= NLA_NESTED
},
1608 static const struct nla_policy macsec_genl_rxsc_policy
[NUM_MACSEC_RXSC_ATTR
] = {
1609 [MACSEC_RXSC_ATTR_SCI
] = { .type
= NLA_U64
},
1610 [MACSEC_RXSC_ATTR_ACTIVE
] = { .type
= NLA_U8
},
1613 static const struct nla_policy macsec_genl_sa_policy
[NUM_MACSEC_SA_ATTR
] = {
1614 [MACSEC_SA_ATTR_AN
] = { .type
= NLA_U8
},
1615 [MACSEC_SA_ATTR_ACTIVE
] = { .type
= NLA_U8
},
1616 [MACSEC_SA_ATTR_PN
] = NLA_POLICY_MIN_LEN(4),
1617 [MACSEC_SA_ATTR_KEYID
] = { .type
= NLA_BINARY
,
1618 .len
= MACSEC_KEYID_LEN
, },
1619 [MACSEC_SA_ATTR_KEY
] = { .type
= NLA_BINARY
,
1620 .len
= MACSEC_MAX_KEY_LEN
, },
1621 [MACSEC_SA_ATTR_SSCI
] = { .type
= NLA_U32
},
1622 [MACSEC_SA_ATTR_SALT
] = { .type
= NLA_BINARY
,
1623 .len
= MACSEC_SALT_LEN
, },
1626 static const struct nla_policy macsec_genl_offload_policy
[NUM_MACSEC_OFFLOAD_ATTR
] = {
1627 [MACSEC_OFFLOAD_ATTR_TYPE
] = { .type
= NLA_U8
},
1630 /* Offloads an operation to a device driver */
1631 static int macsec_offload(int (* const func
)(struct macsec_context
*),
1632 struct macsec_context
*ctx
)
1636 if (unlikely(!func
))
1639 if (ctx
->offload
== MACSEC_OFFLOAD_PHY
)
1640 mutex_lock(&ctx
->phydev
->lock
);
1642 /* Phase I: prepare. The drive should fail here if there are going to be
1643 * issues in the commit phase.
1645 ctx
->prepare
= true;
1650 /* Phase II: commit. This step cannot fail. */
1651 ctx
->prepare
= false;
1653 /* This should never happen: commit is not allowed to fail */
1655 WARN(1, "MACsec offloading commit failed (%d)\n", ret
);
1658 if (ctx
->offload
== MACSEC_OFFLOAD_PHY
)
1659 mutex_unlock(&ctx
->phydev
->lock
);
1664 static int parse_sa_config(struct nlattr
**attrs
, struct nlattr
**tb_sa
)
1666 if (!attrs
[MACSEC_ATTR_SA_CONFIG
])
1669 if (nla_parse_nested_deprecated(tb_sa
, MACSEC_SA_ATTR_MAX
, attrs
[MACSEC_ATTR_SA_CONFIG
], macsec_genl_sa_policy
, NULL
))
1675 static int parse_rxsc_config(struct nlattr
**attrs
, struct nlattr
**tb_rxsc
)
1677 if (!attrs
[MACSEC_ATTR_RXSC_CONFIG
])
1680 if (nla_parse_nested_deprecated(tb_rxsc
, MACSEC_RXSC_ATTR_MAX
, attrs
[MACSEC_ATTR_RXSC_CONFIG
], macsec_genl_rxsc_policy
, NULL
))
1686 static bool validate_add_rxsa(struct nlattr
**attrs
)
1688 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1689 !attrs
[MACSEC_SA_ATTR_KEY
] ||
1690 !attrs
[MACSEC_SA_ATTR_KEYID
])
1693 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1696 if (attrs
[MACSEC_SA_ATTR_PN
] &&
1697 *(u64
*)nla_data(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1700 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1701 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1705 if (nla_len(attrs
[MACSEC_SA_ATTR_KEYID
]) != MACSEC_KEYID_LEN
)
1711 static int macsec_add_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
1713 struct net_device
*dev
;
1714 struct nlattr
**attrs
= info
->attrs
;
1715 struct macsec_secy
*secy
;
1716 struct macsec_rx_sc
*rx_sc
;
1717 struct macsec_rx_sa
*rx_sa
;
1718 unsigned char assoc_num
;
1720 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1721 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1724 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1727 if (parse_sa_config(attrs
, tb_sa
))
1730 if (parse_rxsc_config(attrs
, tb_rxsc
))
1733 if (!validate_add_rxsa(tb_sa
))
1737 rx_sc
= get_rxsc_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, &dev
, &secy
);
1738 if (IS_ERR(rx_sc
)) {
1740 return PTR_ERR(rx_sc
);
1743 assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1745 if (nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]) != secy
->key_len
) {
1746 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1747 nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]), secy
->key_len
);
1752 pn_len
= secy
->xpn
? MACSEC_XPN_PN_LEN
: MACSEC_DEFAULT_PN_LEN
;
1753 if (nla_len(tb_sa
[MACSEC_SA_ATTR_PN
]) != pn_len
) {
1754 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1755 nla_len(tb_sa
[MACSEC_SA_ATTR_PN
]), pn_len
);
1761 if (!tb_sa
[MACSEC_SA_ATTR_SSCI
] || !tb_sa
[MACSEC_SA_ATTR_SALT
]) {
1766 if (nla_len(tb_sa
[MACSEC_SA_ATTR_SALT
]) != MACSEC_SALT_LEN
) {
1767 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1768 nla_len(tb_sa
[MACSEC_SA_ATTR_SALT
]),
1769 MACSEC_SA_ATTR_SALT
);
1775 rx_sa
= rtnl_dereference(rx_sc
->sa
[assoc_num
]);
1781 rx_sa
= kmalloc(sizeof(*rx_sa
), GFP_KERNEL
);
1787 err
= init_rx_sa(rx_sa
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
1788 secy
->key_len
, secy
->icv_len
);
1795 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
1796 spin_lock_bh(&rx_sa
->lock
);
1797 rx_sa
->next_pn
= nla_get_u64(tb_sa
[MACSEC_SA_ATTR_PN
]);
1798 spin_unlock_bh(&rx_sa
->lock
);
1801 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
1802 rx_sa
->active
= !!nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
1806 /* If h/w offloading is available, propagate to the device */
1807 if (macsec_is_offloaded(netdev_priv(dev
))) {
1808 const struct macsec_ops
*ops
;
1809 struct macsec_context ctx
;
1811 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
1817 ctx
.sa
.assoc_num
= assoc_num
;
1818 ctx
.sa
.rx_sa
= rx_sa
;
1820 memcpy(ctx
.sa
.key
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
1823 err
= macsec_offload(ops
->mdo_add_rxsa
, &ctx
);
1829 rx_sa
->ssci
= nla_get_ssci(tb_sa
[MACSEC_SA_ATTR_SSCI
]);
1830 nla_memcpy(rx_sa
->key
.salt
.bytes
, tb_sa
[MACSEC_SA_ATTR_SALT
],
1834 nla_memcpy(rx_sa
->key
.id
, tb_sa
[MACSEC_SA_ATTR_KEYID
], MACSEC_KEYID_LEN
);
1835 rcu_assign_pointer(rx_sc
->sa
[assoc_num
], rx_sa
);
1847 static bool validate_add_rxsc(struct nlattr
**attrs
)
1849 if (!attrs
[MACSEC_RXSC_ATTR_SCI
])
1852 if (attrs
[MACSEC_RXSC_ATTR_ACTIVE
]) {
1853 if (nla_get_u8(attrs
[MACSEC_RXSC_ATTR_ACTIVE
]) > 1)
1860 static int macsec_add_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
1862 struct net_device
*dev
;
1863 sci_t sci
= MACSEC_UNDEF_SCI
;
1864 struct nlattr
**attrs
= info
->attrs
;
1865 struct macsec_rx_sc
*rx_sc
;
1866 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
1867 struct macsec_secy
*secy
;
1871 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1874 if (parse_rxsc_config(attrs
, tb_rxsc
))
1877 if (!validate_add_rxsc(tb_rxsc
))
1881 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
1884 return PTR_ERR(dev
);
1887 secy
= &macsec_priv(dev
)->secy
;
1888 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
1890 rx_sc
= create_rx_sc(dev
, sci
);
1891 if (IS_ERR(rx_sc
)) {
1893 return PTR_ERR(rx_sc
);
1896 was_active
= rx_sc
->active
;
1897 if (tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
])
1898 rx_sc
->active
= !!nla_get_u8(tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]);
1900 if (macsec_is_offloaded(netdev_priv(dev
))) {
1901 const struct macsec_ops
*ops
;
1902 struct macsec_context ctx
;
1904 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
1913 ret
= macsec_offload(ops
->mdo_add_rxsc
, &ctx
);
1923 rx_sc
->active
= was_active
;
1928 static bool validate_add_txsa(struct nlattr
**attrs
)
1930 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
1931 !attrs
[MACSEC_SA_ATTR_PN
] ||
1932 !attrs
[MACSEC_SA_ATTR_KEY
] ||
1933 !attrs
[MACSEC_SA_ATTR_KEYID
])
1936 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
1939 if (nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
1942 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
1943 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
1947 if (nla_len(attrs
[MACSEC_SA_ATTR_KEYID
]) != MACSEC_KEYID_LEN
)
1953 static int macsec_add_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
1955 struct net_device
*dev
;
1956 struct nlattr
**attrs
= info
->attrs
;
1957 struct macsec_secy
*secy
;
1958 struct macsec_tx_sc
*tx_sc
;
1959 struct macsec_tx_sa
*tx_sa
;
1960 unsigned char assoc_num
;
1962 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
1963 bool was_operational
;
1966 if (!attrs
[MACSEC_ATTR_IFINDEX
])
1969 if (parse_sa_config(attrs
, tb_sa
))
1972 if (!validate_add_txsa(tb_sa
))
1976 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
1979 return PTR_ERR(dev
);
1982 secy
= &macsec_priv(dev
)->secy
;
1983 tx_sc
= &secy
->tx_sc
;
1985 assoc_num
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_AN
]);
1987 if (nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]) != secy
->key_len
) {
1988 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1989 nla_len(tb_sa
[MACSEC_SA_ATTR_KEY
]), secy
->key_len
);
1994 pn_len
= secy
->xpn
? MACSEC_XPN_PN_LEN
: MACSEC_DEFAULT_PN_LEN
;
1995 if (nla_len(tb_sa
[MACSEC_SA_ATTR_PN
]) != pn_len
) {
1996 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
1997 nla_len(tb_sa
[MACSEC_SA_ATTR_PN
]), pn_len
);
2003 if (!tb_sa
[MACSEC_SA_ATTR_SSCI
] || !tb_sa
[MACSEC_SA_ATTR_SALT
]) {
2008 if (nla_len(tb_sa
[MACSEC_SA_ATTR_SALT
]) != MACSEC_SALT_LEN
) {
2009 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2010 nla_len(tb_sa
[MACSEC_SA_ATTR_SALT
]),
2011 MACSEC_SA_ATTR_SALT
);
2017 tx_sa
= rtnl_dereference(tx_sc
->sa
[assoc_num
]);
2023 tx_sa
= kmalloc(sizeof(*tx_sa
), GFP_KERNEL
);
2029 err
= init_tx_sa(tx_sa
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
2030 secy
->key_len
, secy
->icv_len
);
2037 spin_lock_bh(&tx_sa
->lock
);
2038 tx_sa
->next_pn
= nla_get_u64(tb_sa
[MACSEC_SA_ATTR_PN
]);
2039 spin_unlock_bh(&tx_sa
->lock
);
2041 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
2042 tx_sa
->active
= !!nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
2044 was_operational
= secy
->operational
;
2045 if (assoc_num
== tx_sc
->encoding_sa
&& tx_sa
->active
)
2046 secy
->operational
= true;
2048 /* If h/w offloading is available, propagate to the device */
2049 if (macsec_is_offloaded(netdev_priv(dev
))) {
2050 const struct macsec_ops
*ops
;
2051 struct macsec_context ctx
;
2053 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
2059 ctx
.sa
.assoc_num
= assoc_num
;
2060 ctx
.sa
.tx_sa
= tx_sa
;
2062 memcpy(ctx
.sa
.key
, nla_data(tb_sa
[MACSEC_SA_ATTR_KEY
]),
2065 err
= macsec_offload(ops
->mdo_add_txsa
, &ctx
);
2071 tx_sa
->ssci
= nla_get_ssci(tb_sa
[MACSEC_SA_ATTR_SSCI
]);
2072 nla_memcpy(tx_sa
->key
.salt
.bytes
, tb_sa
[MACSEC_SA_ATTR_SALT
],
2076 nla_memcpy(tx_sa
->key
.id
, tb_sa
[MACSEC_SA_ATTR_KEYID
], MACSEC_KEYID_LEN
);
2077 rcu_assign_pointer(tx_sc
->sa
[assoc_num
], tx_sa
);
2084 secy
->operational
= was_operational
;
2090 static int macsec_del_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
2092 struct nlattr
**attrs
= info
->attrs
;
2093 struct net_device
*dev
;
2094 struct macsec_secy
*secy
;
2095 struct macsec_rx_sc
*rx_sc
;
2096 struct macsec_rx_sa
*rx_sa
;
2098 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
2099 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
2102 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2105 if (parse_sa_config(attrs
, tb_sa
))
2108 if (parse_rxsc_config(attrs
, tb_rxsc
))
2112 rx_sa
= get_rxsa_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, tb_sa
,
2113 &dev
, &secy
, &rx_sc
, &assoc_num
);
2114 if (IS_ERR(rx_sa
)) {
2116 return PTR_ERR(rx_sa
);
2119 if (rx_sa
->active
) {
2124 /* If h/w offloading is available, propagate to the device */
2125 if (macsec_is_offloaded(netdev_priv(dev
))) {
2126 const struct macsec_ops
*ops
;
2127 struct macsec_context ctx
;
2129 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
2135 ctx
.sa
.assoc_num
= assoc_num
;
2136 ctx
.sa
.rx_sa
= rx_sa
;
2139 ret
= macsec_offload(ops
->mdo_del_rxsa
, &ctx
);
2144 RCU_INIT_POINTER(rx_sc
->sa
[assoc_num
], NULL
);
2156 static int macsec_del_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
2158 struct nlattr
**attrs
= info
->attrs
;
2159 struct net_device
*dev
;
2160 struct macsec_secy
*secy
;
2161 struct macsec_rx_sc
*rx_sc
;
2163 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
2166 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2169 if (parse_rxsc_config(attrs
, tb_rxsc
))
2172 if (!tb_rxsc
[MACSEC_RXSC_ATTR_SCI
])
2176 dev
= get_dev_from_nl(genl_info_net(info
), info
->attrs
);
2179 return PTR_ERR(dev
);
2182 secy
= &macsec_priv(dev
)->secy
;
2183 sci
= nla_get_sci(tb_rxsc
[MACSEC_RXSC_ATTR_SCI
]);
2185 rx_sc
= del_rx_sc(secy
, sci
);
2191 /* If h/w offloading is available, propagate to the device */
2192 if (macsec_is_offloaded(netdev_priv(dev
))) {
2193 const struct macsec_ops
*ops
;
2194 struct macsec_context ctx
;
2196 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
2204 ret
= macsec_offload(ops
->mdo_del_rxsc
, &ctx
);
2219 static int macsec_del_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
2221 struct nlattr
**attrs
= info
->attrs
;
2222 struct net_device
*dev
;
2223 struct macsec_secy
*secy
;
2224 struct macsec_tx_sc
*tx_sc
;
2225 struct macsec_tx_sa
*tx_sa
;
2227 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
2230 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2233 if (parse_sa_config(attrs
, tb_sa
))
2237 tx_sa
= get_txsa_from_nl(genl_info_net(info
), attrs
, tb_sa
,
2238 &dev
, &secy
, &tx_sc
, &assoc_num
);
2239 if (IS_ERR(tx_sa
)) {
2241 return PTR_ERR(tx_sa
);
2244 if (tx_sa
->active
) {
2249 /* If h/w offloading is available, propagate to the device */
2250 if (macsec_is_offloaded(netdev_priv(dev
))) {
2251 const struct macsec_ops
*ops
;
2252 struct macsec_context ctx
;
2254 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
2260 ctx
.sa
.assoc_num
= assoc_num
;
2261 ctx
.sa
.tx_sa
= tx_sa
;
2264 ret
= macsec_offload(ops
->mdo_del_txsa
, &ctx
);
2269 RCU_INIT_POINTER(tx_sc
->sa
[assoc_num
], NULL
);
2281 static bool validate_upd_sa(struct nlattr
**attrs
)
2283 if (!attrs
[MACSEC_SA_ATTR_AN
] ||
2284 attrs
[MACSEC_SA_ATTR_KEY
] ||
2285 attrs
[MACSEC_SA_ATTR_KEYID
] ||
2286 attrs
[MACSEC_SA_ATTR_SSCI
] ||
2287 attrs
[MACSEC_SA_ATTR_SALT
])
2290 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_AN
]) >= MACSEC_NUM_AN
)
2293 if (attrs
[MACSEC_SA_ATTR_PN
] && nla_get_u32(attrs
[MACSEC_SA_ATTR_PN
]) == 0)
2296 if (attrs
[MACSEC_SA_ATTR_ACTIVE
]) {
2297 if (nla_get_u8(attrs
[MACSEC_SA_ATTR_ACTIVE
]) > 1)
2304 static int macsec_upd_txsa(struct sk_buff
*skb
, struct genl_info
*info
)
2306 struct nlattr
**attrs
= info
->attrs
;
2307 struct net_device
*dev
;
2308 struct macsec_secy
*secy
;
2309 struct macsec_tx_sc
*tx_sc
;
2310 struct macsec_tx_sa
*tx_sa
;
2312 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
2313 bool was_operational
, was_active
;
2319 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2322 if (parse_sa_config(attrs
, tb_sa
))
2325 if (!validate_upd_sa(tb_sa
))
2329 tx_sa
= get_txsa_from_nl(genl_info_net(info
), attrs
, tb_sa
,
2330 &dev
, &secy
, &tx_sc
, &assoc_num
);
2331 if (IS_ERR(tx_sa
)) {
2333 return PTR_ERR(tx_sa
);
2336 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
2339 pn_len
= secy
->xpn
? MACSEC_XPN_PN_LEN
: MACSEC_DEFAULT_PN_LEN
;
2340 if (nla_len(tb_sa
[MACSEC_SA_ATTR_PN
]) != pn_len
) {
2341 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2342 nla_len(tb_sa
[MACSEC_SA_ATTR_PN
]), pn_len
);
2347 spin_lock_bh(&tx_sa
->lock
);
2348 prev_pn
= tx_sa
->next_pn_halves
;
2349 tx_sa
->next_pn
= nla_get_u64(tb_sa
[MACSEC_SA_ATTR_PN
]);
2350 spin_unlock_bh(&tx_sa
->lock
);
2353 was_active
= tx_sa
->active
;
2354 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
2355 tx_sa
->active
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
2357 was_operational
= secy
->operational
;
2358 if (assoc_num
== tx_sc
->encoding_sa
)
2359 secy
->operational
= tx_sa
->active
;
2361 /* If h/w offloading is available, propagate to the device */
2362 if (macsec_is_offloaded(netdev_priv(dev
))) {
2363 const struct macsec_ops
*ops
;
2364 struct macsec_context ctx
;
2366 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
2372 ctx
.sa
.assoc_num
= assoc_num
;
2373 ctx
.sa
.tx_sa
= tx_sa
;
2376 ret
= macsec_offload(ops
->mdo_upd_txsa
, &ctx
);
2386 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
2387 spin_lock_bh(&tx_sa
->lock
);
2388 tx_sa
->next_pn_halves
= prev_pn
;
2389 spin_unlock_bh(&tx_sa
->lock
);
2391 tx_sa
->active
= was_active
;
2392 secy
->operational
= was_operational
;
2397 static int macsec_upd_rxsa(struct sk_buff
*skb
, struct genl_info
*info
)
2399 struct nlattr
**attrs
= info
->attrs
;
2400 struct net_device
*dev
;
2401 struct macsec_secy
*secy
;
2402 struct macsec_rx_sc
*rx_sc
;
2403 struct macsec_rx_sa
*rx_sa
;
2405 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
2406 struct nlattr
*tb_sa
[MACSEC_SA_ATTR_MAX
+ 1];
2413 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2416 if (parse_rxsc_config(attrs
, tb_rxsc
))
2419 if (parse_sa_config(attrs
, tb_sa
))
2422 if (!validate_upd_sa(tb_sa
))
2426 rx_sa
= get_rxsa_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, tb_sa
,
2427 &dev
, &secy
, &rx_sc
, &assoc_num
);
2428 if (IS_ERR(rx_sa
)) {
2430 return PTR_ERR(rx_sa
);
2433 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
2436 pn_len
= secy
->xpn
? MACSEC_XPN_PN_LEN
: MACSEC_DEFAULT_PN_LEN
;
2437 if (nla_len(tb_sa
[MACSEC_SA_ATTR_PN
]) != pn_len
) {
2438 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2439 nla_len(tb_sa
[MACSEC_SA_ATTR_PN
]), pn_len
);
2444 spin_lock_bh(&rx_sa
->lock
);
2445 prev_pn
= rx_sa
->next_pn_halves
;
2446 rx_sa
->next_pn
= nla_get_u64(tb_sa
[MACSEC_SA_ATTR_PN
]);
2447 spin_unlock_bh(&rx_sa
->lock
);
2450 was_active
= rx_sa
->active
;
2451 if (tb_sa
[MACSEC_SA_ATTR_ACTIVE
])
2452 rx_sa
->active
= nla_get_u8(tb_sa
[MACSEC_SA_ATTR_ACTIVE
]);
2454 /* If h/w offloading is available, propagate to the device */
2455 if (macsec_is_offloaded(netdev_priv(dev
))) {
2456 const struct macsec_ops
*ops
;
2457 struct macsec_context ctx
;
2459 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
2465 ctx
.sa
.assoc_num
= assoc_num
;
2466 ctx
.sa
.rx_sa
= rx_sa
;
2469 ret
= macsec_offload(ops
->mdo_upd_rxsa
, &ctx
);
2478 if (tb_sa
[MACSEC_SA_ATTR_PN
]) {
2479 spin_lock_bh(&rx_sa
->lock
);
2480 rx_sa
->next_pn_halves
= prev_pn
;
2481 spin_unlock_bh(&rx_sa
->lock
);
2483 rx_sa
->active
= was_active
;
2488 static int macsec_upd_rxsc(struct sk_buff
*skb
, struct genl_info
*info
)
2490 struct nlattr
**attrs
= info
->attrs
;
2491 struct net_device
*dev
;
2492 struct macsec_secy
*secy
;
2493 struct macsec_rx_sc
*rx_sc
;
2494 struct nlattr
*tb_rxsc
[MACSEC_RXSC_ATTR_MAX
+ 1];
2495 unsigned int prev_n_rx_sc
;
2499 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2502 if (parse_rxsc_config(attrs
, tb_rxsc
))
2505 if (!validate_add_rxsc(tb_rxsc
))
2509 rx_sc
= get_rxsc_from_nl(genl_info_net(info
), attrs
, tb_rxsc
, &dev
, &secy
);
2510 if (IS_ERR(rx_sc
)) {
2512 return PTR_ERR(rx_sc
);
2515 was_active
= rx_sc
->active
;
2516 prev_n_rx_sc
= secy
->n_rx_sc
;
2517 if (tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]) {
2518 bool new = !!nla_get_u8(tb_rxsc
[MACSEC_RXSC_ATTR_ACTIVE
]);
2520 if (rx_sc
->active
!= new)
2521 secy
->n_rx_sc
+= new ? 1 : -1;
2523 rx_sc
->active
= new;
2526 /* If h/w offloading is available, propagate to the device */
2527 if (macsec_is_offloaded(netdev_priv(dev
))) {
2528 const struct macsec_ops
*ops
;
2529 struct macsec_context ctx
;
2531 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
2540 ret
= macsec_offload(ops
->mdo_upd_rxsc
, &ctx
);
2550 secy
->n_rx_sc
= prev_n_rx_sc
;
2551 rx_sc
->active
= was_active
;
2556 static bool macsec_is_configured(struct macsec_dev
*macsec
)
2558 struct macsec_secy
*secy
= &macsec
->secy
;
2559 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
2562 if (secy
->n_rx_sc
> 0)
2565 for (i
= 0; i
< MACSEC_NUM_AN
; i
++)
2572 static int macsec_upd_offload(struct sk_buff
*skb
, struct genl_info
*info
)
2574 struct nlattr
*tb_offload
[MACSEC_OFFLOAD_ATTR_MAX
+ 1];
2575 enum macsec_offload offload
, prev_offload
;
2576 int (*func
)(struct macsec_context
*ctx
);
2577 struct nlattr
**attrs
= info
->attrs
;
2578 struct net_device
*dev
;
2579 const struct macsec_ops
*ops
;
2580 struct macsec_context ctx
;
2581 struct macsec_dev
*macsec
;
2584 if (!attrs
[MACSEC_ATTR_IFINDEX
])
2587 if (!attrs
[MACSEC_ATTR_OFFLOAD
])
2590 if (nla_parse_nested_deprecated(tb_offload
, MACSEC_OFFLOAD_ATTR_MAX
,
2591 attrs
[MACSEC_ATTR_OFFLOAD
],
2592 macsec_genl_offload_policy
, NULL
))
2595 dev
= get_dev_from_nl(genl_info_net(info
), attrs
);
2597 return PTR_ERR(dev
);
2598 macsec
= macsec_priv(dev
);
2600 if (!tb_offload
[MACSEC_OFFLOAD_ATTR_TYPE
])
2603 offload
= nla_get_u8(tb_offload
[MACSEC_OFFLOAD_ATTR_TYPE
]);
2604 if (macsec
->offload
== offload
)
2607 /* Check if the offloading mode is supported by the underlying layers */
2608 if (offload
!= MACSEC_OFFLOAD_OFF
&&
2609 !macsec_check_offload(offload
, macsec
))
2612 /* Check if the net device is busy. */
2613 if (netif_running(dev
))
2618 prev_offload
= macsec
->offload
;
2619 macsec
->offload
= offload
;
2621 /* Check if the device already has rules configured: we do not support
2624 if (macsec_is_configured(macsec
)) {
2629 ops
= __macsec_get_ops(offload
== MACSEC_OFFLOAD_OFF
? prev_offload
: offload
,
2636 if (prev_offload
== MACSEC_OFFLOAD_OFF
)
2637 func
= ops
->mdo_add_secy
;
2639 func
= ops
->mdo_del_secy
;
2641 ctx
.secy
= &macsec
->secy
;
2642 ret
= macsec_offload(func
, &ctx
);
2646 /* Force features update, since they are different for SW MACSec and
2647 * HW offloading cases.
2649 netdev_update_features(dev
);
2655 macsec
->offload
= prev_offload
;
2661 static void get_tx_sa_stats(struct net_device
*dev
, int an
,
2662 struct macsec_tx_sa
*tx_sa
,
2663 struct macsec_tx_sa_stats
*sum
)
2665 struct macsec_dev
*macsec
= macsec_priv(dev
);
2668 /* If h/w offloading is available, propagate to the device */
2669 if (macsec_is_offloaded(macsec
)) {
2670 const struct macsec_ops
*ops
;
2671 struct macsec_context ctx
;
2673 ops
= macsec_get_ops(macsec
, &ctx
);
2675 ctx
.sa
.assoc_num
= an
;
2676 ctx
.sa
.tx_sa
= tx_sa
;
2677 ctx
.stats
.tx_sa_stats
= sum
;
2678 ctx
.secy
= &macsec_priv(dev
)->secy
;
2679 macsec_offload(ops
->mdo_get_tx_sa_stats
, &ctx
);
2684 for_each_possible_cpu(cpu
) {
2685 const struct macsec_tx_sa_stats
*stats
=
2686 per_cpu_ptr(tx_sa
->stats
, cpu
);
2688 sum
->OutPktsProtected
+= stats
->OutPktsProtected
;
2689 sum
->OutPktsEncrypted
+= stats
->OutPktsEncrypted
;
2693 static int copy_tx_sa_stats(struct sk_buff
*skb
, struct macsec_tx_sa_stats
*sum
)
2695 if (nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED
,
2696 sum
->OutPktsProtected
) ||
2697 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED
,
2698 sum
->OutPktsEncrypted
))
2704 static void get_rx_sa_stats(struct net_device
*dev
,
2705 struct macsec_rx_sc
*rx_sc
, int an
,
2706 struct macsec_rx_sa
*rx_sa
,
2707 struct macsec_rx_sa_stats
*sum
)
2709 struct macsec_dev
*macsec
= macsec_priv(dev
);
2712 /* If h/w offloading is available, propagate to the device */
2713 if (macsec_is_offloaded(macsec
)) {
2714 const struct macsec_ops
*ops
;
2715 struct macsec_context ctx
;
2717 ops
= macsec_get_ops(macsec
, &ctx
);
2719 ctx
.sa
.assoc_num
= an
;
2720 ctx
.sa
.rx_sa
= rx_sa
;
2721 ctx
.stats
.rx_sa_stats
= sum
;
2722 ctx
.secy
= &macsec_priv(dev
)->secy
;
2724 macsec_offload(ops
->mdo_get_rx_sa_stats
, &ctx
);
2729 for_each_possible_cpu(cpu
) {
2730 const struct macsec_rx_sa_stats
*stats
=
2731 per_cpu_ptr(rx_sa
->stats
, cpu
);
2733 sum
->InPktsOK
+= stats
->InPktsOK
;
2734 sum
->InPktsInvalid
+= stats
->InPktsInvalid
;
2735 sum
->InPktsNotValid
+= stats
->InPktsNotValid
;
2736 sum
->InPktsNotUsingSA
+= stats
->InPktsNotUsingSA
;
2737 sum
->InPktsUnusedSA
+= stats
->InPktsUnusedSA
;
2741 static int copy_rx_sa_stats(struct sk_buff
*skb
,
2742 struct macsec_rx_sa_stats
*sum
)
2744 if (nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_OK
, sum
->InPktsOK
) ||
2745 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID
,
2746 sum
->InPktsInvalid
) ||
2747 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID
,
2748 sum
->InPktsNotValid
) ||
2749 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA
,
2750 sum
->InPktsNotUsingSA
) ||
2751 nla_put_u32(skb
, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA
,
2752 sum
->InPktsUnusedSA
))
2758 static void get_rx_sc_stats(struct net_device
*dev
,
2759 struct macsec_rx_sc
*rx_sc
,
2760 struct macsec_rx_sc_stats
*sum
)
2762 struct macsec_dev
*macsec
= macsec_priv(dev
);
2765 /* If h/w offloading is available, propagate to the device */
2766 if (macsec_is_offloaded(macsec
)) {
2767 const struct macsec_ops
*ops
;
2768 struct macsec_context ctx
;
2770 ops
= macsec_get_ops(macsec
, &ctx
);
2772 ctx
.stats
.rx_sc_stats
= sum
;
2773 ctx
.secy
= &macsec_priv(dev
)->secy
;
2775 macsec_offload(ops
->mdo_get_rx_sc_stats
, &ctx
);
2780 for_each_possible_cpu(cpu
) {
2781 const struct pcpu_rx_sc_stats
*stats
;
2782 struct macsec_rx_sc_stats tmp
;
2785 stats
= per_cpu_ptr(rx_sc
->stats
, cpu
);
2787 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2788 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2789 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2791 sum
->InOctetsValidated
+= tmp
.InOctetsValidated
;
2792 sum
->InOctetsDecrypted
+= tmp
.InOctetsDecrypted
;
2793 sum
->InPktsUnchecked
+= tmp
.InPktsUnchecked
;
2794 sum
->InPktsDelayed
+= tmp
.InPktsDelayed
;
2795 sum
->InPktsOK
+= tmp
.InPktsOK
;
2796 sum
->InPktsInvalid
+= tmp
.InPktsInvalid
;
2797 sum
->InPktsLate
+= tmp
.InPktsLate
;
2798 sum
->InPktsNotValid
+= tmp
.InPktsNotValid
;
2799 sum
->InPktsNotUsingSA
+= tmp
.InPktsNotUsingSA
;
2800 sum
->InPktsUnusedSA
+= tmp
.InPktsUnusedSA
;
2804 static int copy_rx_sc_stats(struct sk_buff
*skb
, struct macsec_rx_sc_stats
*sum
)
2806 if (nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED
,
2807 sum
->InOctetsValidated
,
2808 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2809 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED
,
2810 sum
->InOctetsDecrypted
,
2811 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2812 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED
,
2813 sum
->InPktsUnchecked
,
2814 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2815 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED
,
2817 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2818 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK
,
2820 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2821 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID
,
2823 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2824 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE
,
2826 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2827 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID
,
2828 sum
->InPktsNotValid
,
2829 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2830 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA
,
2831 sum
->InPktsNotUsingSA
,
2832 MACSEC_RXSC_STATS_ATTR_PAD
) ||
2833 nla_put_u64_64bit(skb
, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA
,
2834 sum
->InPktsUnusedSA
,
2835 MACSEC_RXSC_STATS_ATTR_PAD
))
2841 static void get_tx_sc_stats(struct net_device
*dev
,
2842 struct macsec_tx_sc_stats
*sum
)
2844 struct macsec_dev
*macsec
= macsec_priv(dev
);
2847 /* If h/w offloading is available, propagate to the device */
2848 if (macsec_is_offloaded(macsec
)) {
2849 const struct macsec_ops
*ops
;
2850 struct macsec_context ctx
;
2852 ops
= macsec_get_ops(macsec
, &ctx
);
2854 ctx
.stats
.tx_sc_stats
= sum
;
2855 ctx
.secy
= &macsec_priv(dev
)->secy
;
2856 macsec_offload(ops
->mdo_get_tx_sc_stats
, &ctx
);
2861 for_each_possible_cpu(cpu
) {
2862 const struct pcpu_tx_sc_stats
*stats
;
2863 struct macsec_tx_sc_stats tmp
;
2866 stats
= per_cpu_ptr(macsec_priv(dev
)->secy
.tx_sc
.stats
, cpu
);
2868 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2869 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2870 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2872 sum
->OutPktsProtected
+= tmp
.OutPktsProtected
;
2873 sum
->OutPktsEncrypted
+= tmp
.OutPktsEncrypted
;
2874 sum
->OutOctetsProtected
+= tmp
.OutOctetsProtected
;
2875 sum
->OutOctetsEncrypted
+= tmp
.OutOctetsEncrypted
;
2879 static int copy_tx_sc_stats(struct sk_buff
*skb
, struct macsec_tx_sc_stats
*sum
)
2881 if (nla_put_u64_64bit(skb
, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED
,
2882 sum
->OutPktsProtected
,
2883 MACSEC_TXSC_STATS_ATTR_PAD
) ||
2884 nla_put_u64_64bit(skb
, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED
,
2885 sum
->OutPktsEncrypted
,
2886 MACSEC_TXSC_STATS_ATTR_PAD
) ||
2887 nla_put_u64_64bit(skb
, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED
,
2888 sum
->OutOctetsProtected
,
2889 MACSEC_TXSC_STATS_ATTR_PAD
) ||
2890 nla_put_u64_64bit(skb
, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED
,
2891 sum
->OutOctetsEncrypted
,
2892 MACSEC_TXSC_STATS_ATTR_PAD
))
2898 static void get_secy_stats(struct net_device
*dev
, struct macsec_dev_stats
*sum
)
2900 struct macsec_dev
*macsec
= macsec_priv(dev
);
2903 /* If h/w offloading is available, propagate to the device */
2904 if (macsec_is_offloaded(macsec
)) {
2905 const struct macsec_ops
*ops
;
2906 struct macsec_context ctx
;
2908 ops
= macsec_get_ops(macsec
, &ctx
);
2910 ctx
.stats
.dev_stats
= sum
;
2911 ctx
.secy
= &macsec_priv(dev
)->secy
;
2912 macsec_offload(ops
->mdo_get_dev_stats
, &ctx
);
2917 for_each_possible_cpu(cpu
) {
2918 const struct pcpu_secy_stats
*stats
;
2919 struct macsec_dev_stats tmp
;
2922 stats
= per_cpu_ptr(macsec_priv(dev
)->stats
, cpu
);
2924 start
= u64_stats_fetch_begin_irq(&stats
->syncp
);
2925 memcpy(&tmp
, &stats
->stats
, sizeof(tmp
));
2926 } while (u64_stats_fetch_retry_irq(&stats
->syncp
, start
));
2928 sum
->OutPktsUntagged
+= tmp
.OutPktsUntagged
;
2929 sum
->InPktsUntagged
+= tmp
.InPktsUntagged
;
2930 sum
->OutPktsTooLong
+= tmp
.OutPktsTooLong
;
2931 sum
->InPktsNoTag
+= tmp
.InPktsNoTag
;
2932 sum
->InPktsBadTag
+= tmp
.InPktsBadTag
;
2933 sum
->InPktsUnknownSCI
+= tmp
.InPktsUnknownSCI
;
2934 sum
->InPktsNoSCI
+= tmp
.InPktsNoSCI
;
2935 sum
->InPktsOverrun
+= tmp
.InPktsOverrun
;
2939 static int copy_secy_stats(struct sk_buff
*skb
, struct macsec_dev_stats
*sum
)
2941 if (nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED
,
2942 sum
->OutPktsUntagged
,
2943 MACSEC_SECY_STATS_ATTR_PAD
) ||
2944 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED
,
2945 sum
->InPktsUntagged
,
2946 MACSEC_SECY_STATS_ATTR_PAD
) ||
2947 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG
,
2948 sum
->OutPktsTooLong
,
2949 MACSEC_SECY_STATS_ATTR_PAD
) ||
2950 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG
,
2952 MACSEC_SECY_STATS_ATTR_PAD
) ||
2953 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG
,
2955 MACSEC_SECY_STATS_ATTR_PAD
) ||
2956 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI
,
2957 sum
->InPktsUnknownSCI
,
2958 MACSEC_SECY_STATS_ATTR_PAD
) ||
2959 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI
,
2961 MACSEC_SECY_STATS_ATTR_PAD
) ||
2962 nla_put_u64_64bit(skb
, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN
,
2964 MACSEC_SECY_STATS_ATTR_PAD
))
2970 static int nla_put_secy(struct macsec_secy
*secy
, struct sk_buff
*skb
)
2972 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
2973 struct nlattr
*secy_nest
= nla_nest_start_noflag(skb
,
2980 switch (secy
->key_len
) {
2981 case MACSEC_GCM_AES_128_SAK_LEN
:
2982 csid
= secy
->xpn
? MACSEC_CIPHER_ID_GCM_AES_XPN_128
: MACSEC_DEFAULT_CIPHER_ID
;
2984 case MACSEC_GCM_AES_256_SAK_LEN
:
2985 csid
= secy
->xpn
? MACSEC_CIPHER_ID_GCM_AES_XPN_256
: MACSEC_CIPHER_ID_GCM_AES_256
;
2991 if (nla_put_sci(skb
, MACSEC_SECY_ATTR_SCI
, secy
->sci
,
2992 MACSEC_SECY_ATTR_PAD
) ||
2993 nla_put_u64_64bit(skb
, MACSEC_SECY_ATTR_CIPHER_SUITE
,
2994 csid
, MACSEC_SECY_ATTR_PAD
) ||
2995 nla_put_u8(skb
, MACSEC_SECY_ATTR_ICV_LEN
, secy
->icv_len
) ||
2996 nla_put_u8(skb
, MACSEC_SECY_ATTR_OPER
, secy
->operational
) ||
2997 nla_put_u8(skb
, MACSEC_SECY_ATTR_PROTECT
, secy
->protect_frames
) ||
2998 nla_put_u8(skb
, MACSEC_SECY_ATTR_REPLAY
, secy
->replay_protect
) ||
2999 nla_put_u8(skb
, MACSEC_SECY_ATTR_VALIDATE
, secy
->validate_frames
) ||
3000 nla_put_u8(skb
, MACSEC_SECY_ATTR_ENCRYPT
, tx_sc
->encrypt
) ||
3001 nla_put_u8(skb
, MACSEC_SECY_ATTR_INC_SCI
, tx_sc
->send_sci
) ||
3002 nla_put_u8(skb
, MACSEC_SECY_ATTR_ES
, tx_sc
->end_station
) ||
3003 nla_put_u8(skb
, MACSEC_SECY_ATTR_SCB
, tx_sc
->scb
) ||
3004 nla_put_u8(skb
, MACSEC_SECY_ATTR_ENCODING_SA
, tx_sc
->encoding_sa
))
3007 if (secy
->replay_protect
) {
3008 if (nla_put_u32(skb
, MACSEC_SECY_ATTR_WINDOW
, secy
->replay_window
))
3012 nla_nest_end(skb
, secy_nest
);
3016 nla_nest_cancel(skb
, secy_nest
);
3020 static noinline_for_stack
int
3021 dump_secy(struct macsec_secy
*secy
, struct net_device
*dev
,
3022 struct sk_buff
*skb
, struct netlink_callback
*cb
)
3024 struct macsec_tx_sc_stats tx_sc_stats
= {0, };
3025 struct macsec_tx_sa_stats tx_sa_stats
= {0, };
3026 struct macsec_rx_sc_stats rx_sc_stats
= {0, };
3027 struct macsec_rx_sa_stats rx_sa_stats
= {0, };
3028 struct macsec_dev
*macsec
= netdev_priv(dev
);
3029 struct macsec_dev_stats dev_stats
= {0, };
3030 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
3031 struct nlattr
*txsa_list
, *rxsc_list
;
3032 struct macsec_rx_sc
*rx_sc
;
3033 struct nlattr
*attr
;
3037 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3038 &macsec_fam
, NLM_F_MULTI
, MACSEC_CMD_GET_TXSC
);
3042 genl_dump_check_consistent(cb
, hdr
);
3044 if (nla_put_u32(skb
, MACSEC_ATTR_IFINDEX
, dev
->ifindex
))
3045 goto nla_put_failure
;
3047 attr
= nla_nest_start_noflag(skb
, MACSEC_ATTR_OFFLOAD
);
3049 goto nla_put_failure
;
3050 if (nla_put_u8(skb
, MACSEC_OFFLOAD_ATTR_TYPE
, macsec
->offload
))
3051 goto nla_put_failure
;
3052 nla_nest_end(skb
, attr
);
3054 if (nla_put_secy(secy
, skb
))
3055 goto nla_put_failure
;
3057 attr
= nla_nest_start_noflag(skb
, MACSEC_ATTR_TXSC_STATS
);
3059 goto nla_put_failure
;
3061 get_tx_sc_stats(dev
, &tx_sc_stats
);
3062 if (copy_tx_sc_stats(skb
, &tx_sc_stats
)) {
3063 nla_nest_cancel(skb
, attr
);
3064 goto nla_put_failure
;
3066 nla_nest_end(skb
, attr
);
3068 attr
= nla_nest_start_noflag(skb
, MACSEC_ATTR_SECY_STATS
);
3070 goto nla_put_failure
;
3071 get_secy_stats(dev
, &dev_stats
);
3072 if (copy_secy_stats(skb
, &dev_stats
)) {
3073 nla_nest_cancel(skb
, attr
);
3074 goto nla_put_failure
;
3076 nla_nest_end(skb
, attr
);
3078 txsa_list
= nla_nest_start_noflag(skb
, MACSEC_ATTR_TXSA_LIST
);
3080 goto nla_put_failure
;
3081 for (i
= 0, j
= 1; i
< MACSEC_NUM_AN
; i
++) {
3082 struct macsec_tx_sa
*tx_sa
= rtnl_dereference(tx_sc
->sa
[i
]);
3083 struct nlattr
*txsa_nest
;
3090 txsa_nest
= nla_nest_start_noflag(skb
, j
++);
3092 nla_nest_cancel(skb
, txsa_list
);
3093 goto nla_put_failure
;
3096 attr
= nla_nest_start_noflag(skb
, MACSEC_SA_ATTR_STATS
);
3098 nla_nest_cancel(skb
, txsa_nest
);
3099 nla_nest_cancel(skb
, txsa_list
);
3100 goto nla_put_failure
;
3102 memset(&tx_sa_stats
, 0, sizeof(tx_sa_stats
));
3103 get_tx_sa_stats(dev
, i
, tx_sa
, &tx_sa_stats
);
3104 if (copy_tx_sa_stats(skb
, &tx_sa_stats
)) {
3105 nla_nest_cancel(skb
, attr
);
3106 nla_nest_cancel(skb
, txsa_nest
);
3107 nla_nest_cancel(skb
, txsa_list
);
3108 goto nla_put_failure
;
3110 nla_nest_end(skb
, attr
);
3113 pn
= tx_sa
->next_pn
;
3114 pn_len
= MACSEC_XPN_PN_LEN
;
3116 pn
= tx_sa
->next_pn_halves
.lower
;
3117 pn_len
= MACSEC_DEFAULT_PN_LEN
;
3120 if (nla_put_u8(skb
, MACSEC_SA_ATTR_AN
, i
) ||
3121 nla_put(skb
, MACSEC_SA_ATTR_PN
, pn_len
, &pn
) ||
3122 nla_put(skb
, MACSEC_SA_ATTR_KEYID
, MACSEC_KEYID_LEN
, tx_sa
->key
.id
) ||
3123 (secy
->xpn
&& nla_put_ssci(skb
, MACSEC_SA_ATTR_SSCI
, tx_sa
->ssci
)) ||
3124 nla_put_u8(skb
, MACSEC_SA_ATTR_ACTIVE
, tx_sa
->active
)) {
3125 nla_nest_cancel(skb
, txsa_nest
);
3126 nla_nest_cancel(skb
, txsa_list
);
3127 goto nla_put_failure
;
3130 nla_nest_end(skb
, txsa_nest
);
3132 nla_nest_end(skb
, txsa_list
);
3134 rxsc_list
= nla_nest_start_noflag(skb
, MACSEC_ATTR_RXSC_LIST
);
3136 goto nla_put_failure
;
3139 for_each_rxsc_rtnl(secy
, rx_sc
) {
3141 struct nlattr
*rxsa_list
;
3142 struct nlattr
*rxsc_nest
= nla_nest_start_noflag(skb
, j
++);
3145 nla_nest_cancel(skb
, rxsc_list
);
3146 goto nla_put_failure
;
3149 if (nla_put_u8(skb
, MACSEC_RXSC_ATTR_ACTIVE
, rx_sc
->active
) ||
3150 nla_put_sci(skb
, MACSEC_RXSC_ATTR_SCI
, rx_sc
->sci
,
3151 MACSEC_RXSC_ATTR_PAD
)) {
3152 nla_nest_cancel(skb
, rxsc_nest
);
3153 nla_nest_cancel(skb
, rxsc_list
);
3154 goto nla_put_failure
;
3157 attr
= nla_nest_start_noflag(skb
, MACSEC_RXSC_ATTR_STATS
);
3159 nla_nest_cancel(skb
, rxsc_nest
);
3160 nla_nest_cancel(skb
, rxsc_list
);
3161 goto nla_put_failure
;
3163 memset(&rx_sc_stats
, 0, sizeof(rx_sc_stats
));
3164 get_rx_sc_stats(dev
, rx_sc
, &rx_sc_stats
);
3165 if (copy_rx_sc_stats(skb
, &rx_sc_stats
)) {
3166 nla_nest_cancel(skb
, attr
);
3167 nla_nest_cancel(skb
, rxsc_nest
);
3168 nla_nest_cancel(skb
, rxsc_list
);
3169 goto nla_put_failure
;
3171 nla_nest_end(skb
, attr
);
3173 rxsa_list
= nla_nest_start_noflag(skb
,
3174 MACSEC_RXSC_ATTR_SA_LIST
);
3176 nla_nest_cancel(skb
, rxsc_nest
);
3177 nla_nest_cancel(skb
, rxsc_list
);
3178 goto nla_put_failure
;
3181 for (i
= 0, k
= 1; i
< MACSEC_NUM_AN
; i
++) {
3182 struct macsec_rx_sa
*rx_sa
= rtnl_dereference(rx_sc
->sa
[i
]);
3183 struct nlattr
*rxsa_nest
;
3190 rxsa_nest
= nla_nest_start_noflag(skb
, k
++);
3192 nla_nest_cancel(skb
, rxsa_list
);
3193 nla_nest_cancel(skb
, rxsc_nest
);
3194 nla_nest_cancel(skb
, rxsc_list
);
3195 goto nla_put_failure
;
3198 attr
= nla_nest_start_noflag(skb
,
3199 MACSEC_SA_ATTR_STATS
);
3201 nla_nest_cancel(skb
, rxsa_list
);
3202 nla_nest_cancel(skb
, rxsc_nest
);
3203 nla_nest_cancel(skb
, rxsc_list
);
3204 goto nla_put_failure
;
3206 memset(&rx_sa_stats
, 0, sizeof(rx_sa_stats
));
3207 get_rx_sa_stats(dev
, rx_sc
, i
, rx_sa
, &rx_sa_stats
);
3208 if (copy_rx_sa_stats(skb
, &rx_sa_stats
)) {
3209 nla_nest_cancel(skb
, attr
);
3210 nla_nest_cancel(skb
, rxsa_list
);
3211 nla_nest_cancel(skb
, rxsc_nest
);
3212 nla_nest_cancel(skb
, rxsc_list
);
3213 goto nla_put_failure
;
3215 nla_nest_end(skb
, attr
);
3218 pn
= rx_sa
->next_pn
;
3219 pn_len
= MACSEC_XPN_PN_LEN
;
3221 pn
= rx_sa
->next_pn_halves
.lower
;
3222 pn_len
= MACSEC_DEFAULT_PN_LEN
;
3225 if (nla_put_u8(skb
, MACSEC_SA_ATTR_AN
, i
) ||
3226 nla_put(skb
, MACSEC_SA_ATTR_PN
, pn_len
, &pn
) ||
3227 nla_put(skb
, MACSEC_SA_ATTR_KEYID
, MACSEC_KEYID_LEN
, rx_sa
->key
.id
) ||
3228 (secy
->xpn
&& nla_put_ssci(skb
, MACSEC_SA_ATTR_SSCI
, rx_sa
->ssci
)) ||
3229 nla_put_u8(skb
, MACSEC_SA_ATTR_ACTIVE
, rx_sa
->active
)) {
3230 nla_nest_cancel(skb
, rxsa_nest
);
3231 nla_nest_cancel(skb
, rxsc_nest
);
3232 nla_nest_cancel(skb
, rxsc_list
);
3233 goto nla_put_failure
;
3235 nla_nest_end(skb
, rxsa_nest
);
3238 nla_nest_end(skb
, rxsa_list
);
3239 nla_nest_end(skb
, rxsc_nest
);
3242 nla_nest_end(skb
, rxsc_list
);
3244 genlmsg_end(skb
, hdr
);
3249 genlmsg_cancel(skb
, hdr
);
3253 static int macsec_generation
= 1; /* protected by RTNL */
3255 static int macsec_dump_txsc(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3257 struct net
*net
= sock_net(skb
->sk
);
3258 struct net_device
*dev
;
3261 dev_idx
= cb
->args
[0];
3266 cb
->seq
= macsec_generation
;
3268 for_each_netdev(net
, dev
) {
3269 struct macsec_secy
*secy
;
3274 if (!netif_is_macsec(dev
))
3277 secy
= &macsec_priv(dev
)->secy
;
3278 if (dump_secy(secy
, dev
, skb
, cb
) < 0)
3290 static const struct genl_small_ops macsec_genl_ops
[] = {
3292 .cmd
= MACSEC_CMD_GET_TXSC
,
3293 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3294 .dumpit
= macsec_dump_txsc
,
3297 .cmd
= MACSEC_CMD_ADD_RXSC
,
3298 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3299 .doit
= macsec_add_rxsc
,
3300 .flags
= GENL_ADMIN_PERM
,
3303 .cmd
= MACSEC_CMD_DEL_RXSC
,
3304 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3305 .doit
= macsec_del_rxsc
,
3306 .flags
= GENL_ADMIN_PERM
,
3309 .cmd
= MACSEC_CMD_UPD_RXSC
,
3310 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3311 .doit
= macsec_upd_rxsc
,
3312 .flags
= GENL_ADMIN_PERM
,
3315 .cmd
= MACSEC_CMD_ADD_TXSA
,
3316 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3317 .doit
= macsec_add_txsa
,
3318 .flags
= GENL_ADMIN_PERM
,
3321 .cmd
= MACSEC_CMD_DEL_TXSA
,
3322 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3323 .doit
= macsec_del_txsa
,
3324 .flags
= GENL_ADMIN_PERM
,
3327 .cmd
= MACSEC_CMD_UPD_TXSA
,
3328 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3329 .doit
= macsec_upd_txsa
,
3330 .flags
= GENL_ADMIN_PERM
,
3333 .cmd
= MACSEC_CMD_ADD_RXSA
,
3334 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3335 .doit
= macsec_add_rxsa
,
3336 .flags
= GENL_ADMIN_PERM
,
3339 .cmd
= MACSEC_CMD_DEL_RXSA
,
3340 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3341 .doit
= macsec_del_rxsa
,
3342 .flags
= GENL_ADMIN_PERM
,
3345 .cmd
= MACSEC_CMD_UPD_RXSA
,
3346 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3347 .doit
= macsec_upd_rxsa
,
3348 .flags
= GENL_ADMIN_PERM
,
3351 .cmd
= MACSEC_CMD_UPD_OFFLOAD
,
3352 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
3353 .doit
= macsec_upd_offload
,
3354 .flags
= GENL_ADMIN_PERM
,
3358 static struct genl_family macsec_fam __ro_after_init
= {
3359 .name
= MACSEC_GENL_NAME
,
3361 .version
= MACSEC_GENL_VERSION
,
3362 .maxattr
= MACSEC_ATTR_MAX
,
3363 .policy
= macsec_genl_policy
,
3365 .module
= THIS_MODULE
,
3366 .small_ops
= macsec_genl_ops
,
3367 .n_small_ops
= ARRAY_SIZE(macsec_genl_ops
),
3370 static netdev_tx_t
macsec_start_xmit(struct sk_buff
*skb
,
3371 struct net_device
*dev
)
3373 struct macsec_dev
*macsec
= netdev_priv(dev
);
3374 struct macsec_secy
*secy
= &macsec
->secy
;
3375 struct pcpu_secy_stats
*secy_stats
;
3378 if (macsec_is_offloaded(netdev_priv(dev
))) {
3379 skb
->dev
= macsec
->real_dev
;
3380 return dev_queue_xmit(skb
);
3384 if (!secy
->protect_frames
) {
3385 secy_stats
= this_cpu_ptr(macsec
->stats
);
3386 u64_stats_update_begin(&secy_stats
->syncp
);
3387 secy_stats
->stats
.OutPktsUntagged
++;
3388 u64_stats_update_end(&secy_stats
->syncp
);
3389 skb
->dev
= macsec
->real_dev
;
3391 ret
= dev_queue_xmit(skb
);
3392 count_tx(dev
, ret
, len
);
3396 if (!secy
->operational
) {
3398 dev
->stats
.tx_dropped
++;
3399 return NETDEV_TX_OK
;
3402 skb
= macsec_encrypt(skb
, dev
);
3404 if (PTR_ERR(skb
) != -EINPROGRESS
)
3405 dev
->stats
.tx_dropped
++;
3406 return NETDEV_TX_OK
;
3409 macsec_count_tx(skb
, &macsec
->secy
.tx_sc
, macsec_skb_cb(skb
)->tx_sa
);
3411 macsec_encrypt_finish(skb
, dev
);
3413 ret
= dev_queue_xmit(skb
);
3414 count_tx(dev
, ret
, len
);
3418 #define SW_MACSEC_FEATURES \
3419 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3421 /* If h/w offloading is enabled, use real device features save for
3422 * VLAN_FEATURES - they require additional ops
3423 * HW_MACSEC - no reason to report it
3425 #define REAL_DEV_FEATURES(dev) \
3426 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3428 static int macsec_dev_init(struct net_device
*dev
)
3430 struct macsec_dev
*macsec
= macsec_priv(dev
);
3431 struct net_device
*real_dev
= macsec
->real_dev
;
3434 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
3438 err
= gro_cells_init(&macsec
->gro_cells
, dev
);
3440 free_percpu(dev
->tstats
);
3444 if (macsec_is_offloaded(macsec
)) {
3445 dev
->features
= REAL_DEV_FEATURES(real_dev
);
3447 dev
->features
= real_dev
->features
& SW_MACSEC_FEATURES
;
3448 dev
->features
|= NETIF_F_LLTX
| NETIF_F_GSO_SOFTWARE
;
3451 dev
->needed_headroom
= real_dev
->needed_headroom
+
3452 MACSEC_NEEDED_HEADROOM
;
3453 dev
->needed_tailroom
= real_dev
->needed_tailroom
+
3454 MACSEC_NEEDED_TAILROOM
;
3456 if (is_zero_ether_addr(dev
->dev_addr
))
3457 eth_hw_addr_inherit(dev
, real_dev
);
3458 if (is_zero_ether_addr(dev
->broadcast
))
3459 memcpy(dev
->broadcast
, real_dev
->broadcast
, dev
->addr_len
);
3464 static void macsec_dev_uninit(struct net_device
*dev
)
3466 struct macsec_dev
*macsec
= macsec_priv(dev
);
3468 gro_cells_destroy(&macsec
->gro_cells
);
3469 free_percpu(dev
->tstats
);
3472 static netdev_features_t
macsec_fix_features(struct net_device
*dev
,
3473 netdev_features_t features
)
3475 struct macsec_dev
*macsec
= macsec_priv(dev
);
3476 struct net_device
*real_dev
= macsec
->real_dev
;
3478 if (macsec_is_offloaded(macsec
))
3479 return REAL_DEV_FEATURES(real_dev
);
3481 features
&= (real_dev
->features
& SW_MACSEC_FEATURES
) |
3482 NETIF_F_GSO_SOFTWARE
| NETIF_F_SOFT_FEATURES
;
3483 features
|= NETIF_F_LLTX
;
3488 static int macsec_dev_open(struct net_device
*dev
)
3490 struct macsec_dev
*macsec
= macsec_priv(dev
);
3491 struct net_device
*real_dev
= macsec
->real_dev
;
3494 err
= dev_uc_add(real_dev
, dev
->dev_addr
);
3498 if (dev
->flags
& IFF_ALLMULTI
) {
3499 err
= dev_set_allmulti(real_dev
, 1);
3504 if (dev
->flags
& IFF_PROMISC
) {
3505 err
= dev_set_promiscuity(real_dev
, 1);
3507 goto clear_allmulti
;
3510 /* If h/w offloading is available, propagate to the device */
3511 if (macsec_is_offloaded(macsec
)) {
3512 const struct macsec_ops
*ops
;
3513 struct macsec_context ctx
;
3515 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
3518 goto clear_allmulti
;
3521 ctx
.secy
= &macsec
->secy
;
3522 err
= macsec_offload(ops
->mdo_dev_open
, &ctx
);
3524 goto clear_allmulti
;
3527 if (netif_carrier_ok(real_dev
))
3528 netif_carrier_on(dev
);
3532 if (dev
->flags
& IFF_ALLMULTI
)
3533 dev_set_allmulti(real_dev
, -1);
3535 dev_uc_del(real_dev
, dev
->dev_addr
);
3536 netif_carrier_off(dev
);
3540 static int macsec_dev_stop(struct net_device
*dev
)
3542 struct macsec_dev
*macsec
= macsec_priv(dev
);
3543 struct net_device
*real_dev
= macsec
->real_dev
;
3545 netif_carrier_off(dev
);
3547 /* If h/w offloading is available, propagate to the device */
3548 if (macsec_is_offloaded(macsec
)) {
3549 const struct macsec_ops
*ops
;
3550 struct macsec_context ctx
;
3552 ops
= macsec_get_ops(macsec
, &ctx
);
3554 ctx
.secy
= &macsec
->secy
;
3555 macsec_offload(ops
->mdo_dev_stop
, &ctx
);
3559 dev_mc_unsync(real_dev
, dev
);
3560 dev_uc_unsync(real_dev
, dev
);
3562 if (dev
->flags
& IFF_ALLMULTI
)
3563 dev_set_allmulti(real_dev
, -1);
3565 if (dev
->flags
& IFF_PROMISC
)
3566 dev_set_promiscuity(real_dev
, -1);
3568 dev_uc_del(real_dev
, dev
->dev_addr
);
3573 static void macsec_dev_change_rx_flags(struct net_device
*dev
, int change
)
3575 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
3577 if (!(dev
->flags
& IFF_UP
))
3580 if (change
& IFF_ALLMULTI
)
3581 dev_set_allmulti(real_dev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3583 if (change
& IFF_PROMISC
)
3584 dev_set_promiscuity(real_dev
,
3585 dev
->flags
& IFF_PROMISC
? 1 : -1);
3588 static void macsec_dev_set_rx_mode(struct net_device
*dev
)
3590 struct net_device
*real_dev
= macsec_priv(dev
)->real_dev
;
3592 dev_mc_sync(real_dev
, dev
);
3593 dev_uc_sync(real_dev
, dev
);
3596 static int macsec_set_mac_address(struct net_device
*dev
, void *p
)
3598 struct macsec_dev
*macsec
= macsec_priv(dev
);
3599 struct net_device
*real_dev
= macsec
->real_dev
;
3600 struct sockaddr
*addr
= p
;
3603 if (!is_valid_ether_addr(addr
->sa_data
))
3604 return -EADDRNOTAVAIL
;
3606 if (!(dev
->flags
& IFF_UP
))
3609 err
= dev_uc_add(real_dev
, addr
->sa_data
);
3613 dev_uc_del(real_dev
, dev
->dev_addr
);
3616 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
3617 macsec
->secy
.sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
3619 /* If h/w offloading is available, propagate to the device */
3620 if (macsec_is_offloaded(macsec
)) {
3621 const struct macsec_ops
*ops
;
3622 struct macsec_context ctx
;
3624 ops
= macsec_get_ops(macsec
, &ctx
);
3626 ctx
.secy
= &macsec
->secy
;
3627 macsec_offload(ops
->mdo_upd_secy
, &ctx
);
3634 static int macsec_change_mtu(struct net_device
*dev
, int new_mtu
)
3636 struct macsec_dev
*macsec
= macsec_priv(dev
);
3637 unsigned int extra
= macsec
->secy
.icv_len
+ macsec_extra_len(true);
3639 if (macsec
->real_dev
->mtu
- extra
< new_mtu
)
3647 static void macsec_get_stats64(struct net_device
*dev
,
3648 struct rtnl_link_stats64
*s
)
3653 dev_fetch_sw_netstats(s
, dev
->tstats
);
3655 s
->rx_dropped
= dev
->stats
.rx_dropped
;
3656 s
->tx_dropped
= dev
->stats
.tx_dropped
;
3659 static int macsec_get_iflink(const struct net_device
*dev
)
3661 return macsec_priv(dev
)->real_dev
->ifindex
;
3664 static const struct net_device_ops macsec_netdev_ops
= {
3665 .ndo_init
= macsec_dev_init
,
3666 .ndo_uninit
= macsec_dev_uninit
,
3667 .ndo_open
= macsec_dev_open
,
3668 .ndo_stop
= macsec_dev_stop
,
3669 .ndo_fix_features
= macsec_fix_features
,
3670 .ndo_change_mtu
= macsec_change_mtu
,
3671 .ndo_set_rx_mode
= macsec_dev_set_rx_mode
,
3672 .ndo_change_rx_flags
= macsec_dev_change_rx_flags
,
3673 .ndo_set_mac_address
= macsec_set_mac_address
,
3674 .ndo_start_xmit
= macsec_start_xmit
,
3675 .ndo_get_stats64
= macsec_get_stats64
,
3676 .ndo_get_iflink
= macsec_get_iflink
,
3679 static const struct device_type macsec_type
= {
3683 static const struct nla_policy macsec_rtnl_policy
[IFLA_MACSEC_MAX
+ 1] = {
3684 [IFLA_MACSEC_SCI
] = { .type
= NLA_U64
},
3685 [IFLA_MACSEC_PORT
] = { .type
= NLA_U16
},
3686 [IFLA_MACSEC_ICV_LEN
] = { .type
= NLA_U8
},
3687 [IFLA_MACSEC_CIPHER_SUITE
] = { .type
= NLA_U64
},
3688 [IFLA_MACSEC_WINDOW
] = { .type
= NLA_U32
},
3689 [IFLA_MACSEC_ENCODING_SA
] = { .type
= NLA_U8
},
3690 [IFLA_MACSEC_ENCRYPT
] = { .type
= NLA_U8
},
3691 [IFLA_MACSEC_PROTECT
] = { .type
= NLA_U8
},
3692 [IFLA_MACSEC_INC_SCI
] = { .type
= NLA_U8
},
3693 [IFLA_MACSEC_ES
] = { .type
= NLA_U8
},
3694 [IFLA_MACSEC_SCB
] = { .type
= NLA_U8
},
3695 [IFLA_MACSEC_REPLAY_PROTECT
] = { .type
= NLA_U8
},
3696 [IFLA_MACSEC_VALIDATION
] = { .type
= NLA_U8
},
3699 static void macsec_free_netdev(struct net_device
*dev
)
3701 struct macsec_dev
*macsec
= macsec_priv(dev
);
3703 free_percpu(macsec
->stats
);
3704 free_percpu(macsec
->secy
.tx_sc
.stats
);
3708 static void macsec_setup(struct net_device
*dev
)
3712 dev
->max_mtu
= ETH_MAX_MTU
;
3713 dev
->priv_flags
|= IFF_NO_QUEUE
;
3714 dev
->netdev_ops
= &macsec_netdev_ops
;
3715 dev
->needs_free_netdev
= true;
3716 dev
->priv_destructor
= macsec_free_netdev
;
3717 SET_NETDEV_DEVTYPE(dev
, &macsec_type
);
3719 eth_zero_addr(dev
->broadcast
);
3722 static int macsec_changelink_common(struct net_device
*dev
,
3723 struct nlattr
*data
[])
3725 struct macsec_secy
*secy
;
3726 struct macsec_tx_sc
*tx_sc
;
3728 secy
= &macsec_priv(dev
)->secy
;
3729 tx_sc
= &secy
->tx_sc
;
3731 if (data
[IFLA_MACSEC_ENCODING_SA
]) {
3732 struct macsec_tx_sa
*tx_sa
;
3734 tx_sc
->encoding_sa
= nla_get_u8(data
[IFLA_MACSEC_ENCODING_SA
]);
3735 tx_sa
= rtnl_dereference(tx_sc
->sa
[tx_sc
->encoding_sa
]);
3737 secy
->operational
= tx_sa
&& tx_sa
->active
;
3740 if (data
[IFLA_MACSEC_WINDOW
])
3741 secy
->replay_window
= nla_get_u32(data
[IFLA_MACSEC_WINDOW
]);
3743 if (data
[IFLA_MACSEC_ENCRYPT
])
3744 tx_sc
->encrypt
= !!nla_get_u8(data
[IFLA_MACSEC_ENCRYPT
]);
3746 if (data
[IFLA_MACSEC_PROTECT
])
3747 secy
->protect_frames
= !!nla_get_u8(data
[IFLA_MACSEC_PROTECT
]);
3749 if (data
[IFLA_MACSEC_INC_SCI
])
3750 tx_sc
->send_sci
= !!nla_get_u8(data
[IFLA_MACSEC_INC_SCI
]);
3752 if (data
[IFLA_MACSEC_ES
])
3753 tx_sc
->end_station
= !!nla_get_u8(data
[IFLA_MACSEC_ES
]);
3755 if (data
[IFLA_MACSEC_SCB
])
3756 tx_sc
->scb
= !!nla_get_u8(data
[IFLA_MACSEC_SCB
]);
3758 if (data
[IFLA_MACSEC_REPLAY_PROTECT
])
3759 secy
->replay_protect
= !!nla_get_u8(data
[IFLA_MACSEC_REPLAY_PROTECT
]);
3761 if (data
[IFLA_MACSEC_VALIDATION
])
3762 secy
->validate_frames
= nla_get_u8(data
[IFLA_MACSEC_VALIDATION
]);
3764 if (data
[IFLA_MACSEC_CIPHER_SUITE
]) {
3765 switch (nla_get_u64(data
[IFLA_MACSEC_CIPHER_SUITE
])) {
3766 case MACSEC_CIPHER_ID_GCM_AES_128
:
3767 case MACSEC_DEFAULT_CIPHER_ID
:
3768 secy
->key_len
= MACSEC_GCM_AES_128_SAK_LEN
;
3771 case MACSEC_CIPHER_ID_GCM_AES_256
:
3772 secy
->key_len
= MACSEC_GCM_AES_256_SAK_LEN
;
3775 case MACSEC_CIPHER_ID_GCM_AES_XPN_128
:
3776 secy
->key_len
= MACSEC_GCM_AES_128_SAK_LEN
;
3779 case MACSEC_CIPHER_ID_GCM_AES_XPN_256
:
3780 secy
->key_len
= MACSEC_GCM_AES_256_SAK_LEN
;
3791 static int macsec_changelink(struct net_device
*dev
, struct nlattr
*tb
[],
3792 struct nlattr
*data
[],
3793 struct netlink_ext_ack
*extack
)
3795 struct macsec_dev
*macsec
= macsec_priv(dev
);
3796 struct macsec_tx_sc tx_sc
;
3797 struct macsec_secy secy
;
3803 if (data
[IFLA_MACSEC_CIPHER_SUITE
] ||
3804 data
[IFLA_MACSEC_ICV_LEN
] ||
3805 data
[IFLA_MACSEC_SCI
] ||
3806 data
[IFLA_MACSEC_PORT
])
3809 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3810 * propagation fails, to revert macsec_changelink_common.
3812 memcpy(&secy
, &macsec
->secy
, sizeof(secy
));
3813 memcpy(&tx_sc
, &macsec
->secy
.tx_sc
, sizeof(tx_sc
));
3815 ret
= macsec_changelink_common(dev
, data
);
3819 /* If h/w offloading is available, propagate to the device */
3820 if (macsec_is_offloaded(macsec
)) {
3821 const struct macsec_ops
*ops
;
3822 struct macsec_context ctx
;
3825 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
3831 ctx
.secy
= &macsec
->secy
;
3832 ret
= macsec_offload(ops
->mdo_upd_secy
, &ctx
);
3840 memcpy(&macsec
->secy
.tx_sc
, &tx_sc
, sizeof(tx_sc
));
3841 memcpy(&macsec
->secy
, &secy
, sizeof(secy
));
3846 static void macsec_del_dev(struct macsec_dev
*macsec
)
3850 while (macsec
->secy
.rx_sc
) {
3851 struct macsec_rx_sc
*rx_sc
= rtnl_dereference(macsec
->secy
.rx_sc
);
3853 rcu_assign_pointer(macsec
->secy
.rx_sc
, rx_sc
->next
);
3857 for (i
= 0; i
< MACSEC_NUM_AN
; i
++) {
3858 struct macsec_tx_sa
*sa
= rtnl_dereference(macsec
->secy
.tx_sc
.sa
[i
]);
3861 RCU_INIT_POINTER(macsec
->secy
.tx_sc
.sa
[i
], NULL
);
3867 static void macsec_common_dellink(struct net_device
*dev
, struct list_head
*head
)
3869 struct macsec_dev
*macsec
= macsec_priv(dev
);
3870 struct net_device
*real_dev
= macsec
->real_dev
;
3872 unregister_netdevice_queue(dev
, head
);
3873 list_del_rcu(&macsec
->secys
);
3874 macsec_del_dev(macsec
);
3875 netdev_upper_dev_unlink(real_dev
, dev
);
3877 macsec_generation
++;
3880 static void macsec_dellink(struct net_device
*dev
, struct list_head
*head
)
3882 struct macsec_dev
*macsec
= macsec_priv(dev
);
3883 struct net_device
*real_dev
= macsec
->real_dev
;
3884 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
3886 /* If h/w offloading is available, propagate to the device */
3887 if (macsec_is_offloaded(macsec
)) {
3888 const struct macsec_ops
*ops
;
3889 struct macsec_context ctx
;
3891 ops
= macsec_get_ops(netdev_priv(dev
), &ctx
);
3893 ctx
.secy
= &macsec
->secy
;
3894 macsec_offload(ops
->mdo_del_secy
, &ctx
);
3898 macsec_common_dellink(dev
, head
);
3900 if (list_empty(&rxd
->secys
)) {
3901 netdev_rx_handler_unregister(real_dev
);
3906 static int register_macsec_dev(struct net_device
*real_dev
,
3907 struct net_device
*dev
)
3909 struct macsec_dev
*macsec
= macsec_priv(dev
);
3910 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(real_dev
);
3915 rxd
= kmalloc(sizeof(*rxd
), GFP_KERNEL
);
3919 INIT_LIST_HEAD(&rxd
->secys
);
3921 err
= netdev_rx_handler_register(real_dev
, macsec_handle_frame
,
3929 list_add_tail_rcu(&macsec
->secys
, &rxd
->secys
);
3933 static bool sci_exists(struct net_device
*dev
, sci_t sci
)
3935 struct macsec_rxh_data
*rxd
= macsec_data_rtnl(dev
);
3936 struct macsec_dev
*macsec
;
3938 list_for_each_entry(macsec
, &rxd
->secys
, secys
) {
3939 if (macsec
->secy
.sci
== sci
)
3946 static int macsec_add_dev(struct net_device
*dev
, sci_t sci
, u8 icv_len
)
3948 struct macsec_dev
*macsec
= macsec_priv(dev
);
3949 struct macsec_secy
*secy
= &macsec
->secy
;
3951 macsec
->stats
= netdev_alloc_pcpu_stats(struct pcpu_secy_stats
);
3955 secy
->tx_sc
.stats
= netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats
);
3956 if (!secy
->tx_sc
.stats
) {
3957 free_percpu(macsec
->stats
);
3961 if (sci
== MACSEC_UNDEF_SCI
)
3962 sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
3965 secy
->operational
= true;
3966 secy
->key_len
= DEFAULT_SAK_LEN
;
3967 secy
->icv_len
= icv_len
;
3968 secy
->validate_frames
= MACSEC_VALIDATE_DEFAULT
;
3969 secy
->protect_frames
= true;
3970 secy
->replay_protect
= false;
3971 secy
->xpn
= DEFAULT_XPN
;
3974 secy
->tx_sc
.active
= true;
3975 secy
->tx_sc
.encoding_sa
= DEFAULT_ENCODING_SA
;
3976 secy
->tx_sc
.encrypt
= DEFAULT_ENCRYPT
;
3977 secy
->tx_sc
.send_sci
= DEFAULT_SEND_SCI
;
3978 secy
->tx_sc
.end_station
= false;
3979 secy
->tx_sc
.scb
= false;
3984 static struct lock_class_key macsec_netdev_addr_lock_key
;
3986 static int macsec_newlink(struct net
*net
, struct net_device
*dev
,
3987 struct nlattr
*tb
[], struct nlattr
*data
[],
3988 struct netlink_ext_ack
*extack
)
3990 struct macsec_dev
*macsec
= macsec_priv(dev
);
3991 rx_handler_func_t
*rx_handler
;
3992 u8 icv_len
= DEFAULT_ICV_LEN
;
3993 struct net_device
*real_dev
;
3999 real_dev
= __dev_get_by_index(net
, nla_get_u32(tb
[IFLA_LINK
]));
4002 if (real_dev
->type
!= ARPHRD_ETHER
)
4005 dev
->priv_flags
|= IFF_MACSEC
;
4007 macsec
->real_dev
= real_dev
;
4009 if (data
&& data
[IFLA_MACSEC_OFFLOAD
])
4010 macsec
->offload
= nla_get_offload(data
[IFLA_MACSEC_OFFLOAD
]);
4012 /* MACsec offloading is off by default */
4013 macsec
->offload
= MACSEC_OFFLOAD_OFF
;
4015 /* Check if the offloading mode is supported by the underlying layers */
4016 if (macsec
->offload
!= MACSEC_OFFLOAD_OFF
&&
4017 !macsec_check_offload(macsec
->offload
, macsec
))
4020 if (data
&& data
[IFLA_MACSEC_ICV_LEN
])
4021 icv_len
= nla_get_u8(data
[IFLA_MACSEC_ICV_LEN
]);
4022 mtu
= real_dev
->mtu
- icv_len
- macsec_extra_len(true);
4028 rx_handler
= rtnl_dereference(real_dev
->rx_handler
);
4029 if (rx_handler
&& rx_handler
!= macsec_handle_frame
)
4032 err
= register_netdevice(dev
);
4036 netdev_lockdep_set_classes(dev
);
4037 lockdep_set_class(&dev
->addr_list_lock
,
4038 &macsec_netdev_addr_lock_key
);
4040 err
= netdev_upper_dev_link(real_dev
, dev
, extack
);
4044 /* need to be already registered so that ->init has run and
4045 * the MAC addr is set
4047 if (data
&& data
[IFLA_MACSEC_SCI
])
4048 sci
= nla_get_sci(data
[IFLA_MACSEC_SCI
]);
4049 else if (data
&& data
[IFLA_MACSEC_PORT
])
4050 sci
= dev_to_sci(dev
, nla_get_be16(data
[IFLA_MACSEC_PORT
]));
4052 sci
= dev_to_sci(dev
, MACSEC_PORT_ES
);
4054 if (rx_handler
&& sci_exists(real_dev
, sci
)) {
4059 err
= macsec_add_dev(dev
, sci
, icv_len
);
4064 err
= macsec_changelink_common(dev
, data
);
4069 /* If h/w offloading is available, propagate to the device */
4070 if (macsec_is_offloaded(macsec
)) {
4071 const struct macsec_ops
*ops
;
4072 struct macsec_context ctx
;
4074 ops
= macsec_get_ops(macsec
, &ctx
);
4076 ctx
.secy
= &macsec
->secy
;
4077 err
= macsec_offload(ops
->mdo_add_secy
, &ctx
);
4083 err
= register_macsec_dev(real_dev
, dev
);
4087 netif_stacked_transfer_operstate(real_dev
, dev
);
4088 linkwatch_fire_event(dev
);
4090 macsec_generation
++;
4095 macsec_del_dev(macsec
);
4097 netdev_upper_dev_unlink(real_dev
, dev
);
4099 unregister_netdevice(dev
);
4103 static int macsec_validate_attr(struct nlattr
*tb
[], struct nlattr
*data
[],
4104 struct netlink_ext_ack
*extack
)
4106 u64 csid
= MACSEC_DEFAULT_CIPHER_ID
;
4107 u8 icv_len
= DEFAULT_ICV_LEN
;
4114 if (data
[IFLA_MACSEC_CIPHER_SUITE
])
4115 csid
= nla_get_u64(data
[IFLA_MACSEC_CIPHER_SUITE
]);
4117 if (data
[IFLA_MACSEC_ICV_LEN
]) {
4118 icv_len
= nla_get_u8(data
[IFLA_MACSEC_ICV_LEN
]);
4119 if (icv_len
!= DEFAULT_ICV_LEN
) {
4120 char dummy_key
[DEFAULT_SAK_LEN
] = { 0 };
4121 struct crypto_aead
*dummy_tfm
;
4123 dummy_tfm
= macsec_alloc_tfm(dummy_key
,
4126 if (IS_ERR(dummy_tfm
))
4127 return PTR_ERR(dummy_tfm
);
4128 crypto_free_aead(dummy_tfm
);
4133 case MACSEC_CIPHER_ID_GCM_AES_128
:
4134 case MACSEC_CIPHER_ID_GCM_AES_256
:
4135 case MACSEC_CIPHER_ID_GCM_AES_XPN_128
:
4136 case MACSEC_CIPHER_ID_GCM_AES_XPN_256
:
4137 case MACSEC_DEFAULT_CIPHER_ID
:
4138 if (icv_len
< MACSEC_MIN_ICV_LEN
||
4139 icv_len
> MACSEC_STD_ICV_LEN
)
4146 if (data
[IFLA_MACSEC_ENCODING_SA
]) {
4147 if (nla_get_u8(data
[IFLA_MACSEC_ENCODING_SA
]) >= MACSEC_NUM_AN
)
4151 for (flag
= IFLA_MACSEC_ENCODING_SA
+ 1;
4152 flag
< IFLA_MACSEC_VALIDATION
;
4155 if (nla_get_u8(data
[flag
]) > 1)
4160 es
= data
[IFLA_MACSEC_ES
] ? nla_get_u8(data
[IFLA_MACSEC_ES
]) : false;
4161 sci
= data
[IFLA_MACSEC_INC_SCI
] ? nla_get_u8(data
[IFLA_MACSEC_INC_SCI
]) : false;
4162 scb
= data
[IFLA_MACSEC_SCB
] ? nla_get_u8(data
[IFLA_MACSEC_SCB
]) : false;
4164 if ((sci
&& (scb
|| es
)) || (scb
&& es
))
4167 if (data
[IFLA_MACSEC_VALIDATION
] &&
4168 nla_get_u8(data
[IFLA_MACSEC_VALIDATION
]) > MACSEC_VALIDATE_MAX
)
4171 if ((data
[IFLA_MACSEC_REPLAY_PROTECT
] &&
4172 nla_get_u8(data
[IFLA_MACSEC_REPLAY_PROTECT
])) &&
4173 !data
[IFLA_MACSEC_WINDOW
])
4179 static struct net
*macsec_get_link_net(const struct net_device
*dev
)
4181 return dev_net(macsec_priv(dev
)->real_dev
);
4184 static size_t macsec_get_size(const struct net_device
*dev
)
4186 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4187 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4188 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4189 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4190 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4191 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4192 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4193 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4194 nla_total_size(1) + /* IFLA_MACSEC_ES */
4195 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4196 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4197 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4201 static int macsec_fill_info(struct sk_buff
*skb
,
4202 const struct net_device
*dev
)
4204 struct macsec_secy
*secy
= &macsec_priv(dev
)->secy
;
4205 struct macsec_tx_sc
*tx_sc
= &secy
->tx_sc
;
4208 switch (secy
->key_len
) {
4209 case MACSEC_GCM_AES_128_SAK_LEN
:
4210 csid
= secy
->xpn
? MACSEC_CIPHER_ID_GCM_AES_XPN_128
: MACSEC_DEFAULT_CIPHER_ID
;
4212 case MACSEC_GCM_AES_256_SAK_LEN
:
4213 csid
= secy
->xpn
? MACSEC_CIPHER_ID_GCM_AES_XPN_256
: MACSEC_CIPHER_ID_GCM_AES_256
;
4216 goto nla_put_failure
;
4219 if (nla_put_sci(skb
, IFLA_MACSEC_SCI
, secy
->sci
,
4221 nla_put_u8(skb
, IFLA_MACSEC_ICV_LEN
, secy
->icv_len
) ||
4222 nla_put_u64_64bit(skb
, IFLA_MACSEC_CIPHER_SUITE
,
4223 csid
, IFLA_MACSEC_PAD
) ||
4224 nla_put_u8(skb
, IFLA_MACSEC_ENCODING_SA
, tx_sc
->encoding_sa
) ||
4225 nla_put_u8(skb
, IFLA_MACSEC_ENCRYPT
, tx_sc
->encrypt
) ||
4226 nla_put_u8(skb
, IFLA_MACSEC_PROTECT
, secy
->protect_frames
) ||
4227 nla_put_u8(skb
, IFLA_MACSEC_INC_SCI
, tx_sc
->send_sci
) ||
4228 nla_put_u8(skb
, IFLA_MACSEC_ES
, tx_sc
->end_station
) ||
4229 nla_put_u8(skb
, IFLA_MACSEC_SCB
, tx_sc
->scb
) ||
4230 nla_put_u8(skb
, IFLA_MACSEC_REPLAY_PROTECT
, secy
->replay_protect
) ||
4231 nla_put_u8(skb
, IFLA_MACSEC_VALIDATION
, secy
->validate_frames
) ||
4233 goto nla_put_failure
;
4235 if (secy
->replay_protect
) {
4236 if (nla_put_u32(skb
, IFLA_MACSEC_WINDOW
, secy
->replay_window
))
4237 goto nla_put_failure
;
4246 static struct rtnl_link_ops macsec_link_ops __read_mostly
= {
4248 .priv_size
= sizeof(struct macsec_dev
),
4249 .maxtype
= IFLA_MACSEC_MAX
,
4250 .policy
= macsec_rtnl_policy
,
4251 .setup
= macsec_setup
,
4252 .validate
= macsec_validate_attr
,
4253 .newlink
= macsec_newlink
,
4254 .changelink
= macsec_changelink
,
4255 .dellink
= macsec_dellink
,
4256 .get_size
= macsec_get_size
,
4257 .fill_info
= macsec_fill_info
,
4258 .get_link_net
= macsec_get_link_net
,
4261 static bool is_macsec_master(struct net_device
*dev
)
4263 return rcu_access_pointer(dev
->rx_handler
) == macsec_handle_frame
;
4266 static int macsec_notify(struct notifier_block
*this, unsigned long event
,
4269 struct net_device
*real_dev
= netdev_notifier_info_to_dev(ptr
);
4272 if (!is_macsec_master(real_dev
))
4278 case NETDEV_CHANGE
: {
4279 struct macsec_dev
*m
, *n
;
4280 struct macsec_rxh_data
*rxd
;
4282 rxd
= macsec_data_rtnl(real_dev
);
4283 list_for_each_entry_safe(m
, n
, &rxd
->secys
, secys
) {
4284 struct net_device
*dev
= m
->secy
.netdev
;
4286 netif_stacked_transfer_operstate(real_dev
, dev
);
4290 case NETDEV_UNREGISTER
: {
4291 struct macsec_dev
*m
, *n
;
4292 struct macsec_rxh_data
*rxd
;
4294 rxd
= macsec_data_rtnl(real_dev
);
4295 list_for_each_entry_safe(m
, n
, &rxd
->secys
, secys
) {
4296 macsec_common_dellink(m
->secy
.netdev
, &head
);
4299 netdev_rx_handler_unregister(real_dev
);
4302 unregister_netdevice_many(&head
);
4305 case NETDEV_CHANGEMTU
: {
4306 struct macsec_dev
*m
;
4307 struct macsec_rxh_data
*rxd
;
4309 rxd
= macsec_data_rtnl(real_dev
);
4310 list_for_each_entry(m
, &rxd
->secys
, secys
) {
4311 struct net_device
*dev
= m
->secy
.netdev
;
4312 unsigned int mtu
= real_dev
->mtu
- (m
->secy
.icv_len
+
4313 macsec_extra_len(true));
4316 dev_set_mtu(dev
, mtu
);
4324 static struct notifier_block macsec_notifier
= {
4325 .notifier_call
= macsec_notify
,
4328 static int __init
macsec_init(void)
4332 pr_info("MACsec IEEE 802.1AE\n");
4333 err
= register_netdevice_notifier(&macsec_notifier
);
4337 err
= rtnl_link_register(&macsec_link_ops
);
4341 err
= genl_register_family(&macsec_fam
);
4348 rtnl_link_unregister(&macsec_link_ops
);
4350 unregister_netdevice_notifier(&macsec_notifier
);
4354 static void __exit
macsec_exit(void)
4356 genl_unregister_family(&macsec_fam
);
4357 rtnl_link_unregister(&macsec_link_ops
);
4358 unregister_netdevice_notifier(&macsec_notifier
);
4362 module_init(macsec_init
);
4363 module_exit(macsec_exit
);
4365 MODULE_ALIAS_RTNL_LINK("macsec");
4366 MODULE_ALIAS_GENL_FAMILY("macsec");
4368 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4369 MODULE_LICENSE("GPL v2");