| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * drivers/net/macsec.c - MACsec device |
| * |
| * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net> |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/skbuff.h> |
| #include <linux/socket.h> |
| #include <linux/module.h> |
| #include <crypto/aead.h> |
| #include <linux/etherdevice.h> |
| #include <linux/netdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/refcount.h> |
| #include <net/genetlink.h> |
| #include <net/sock.h> |
| #include <net/gro_cells.h> |
| #include <net/macsec.h> |
| #include <net/dst_metadata.h> |
| #include <linux/phy.h> |
| #include <linux/byteorder/generic.h> |
| #include <linux/if_arp.h> |
| |
| #include <uapi/linux/if_macsec.h> |
| |
| /* SecTAG length = macsec_eth_header without the optional SCI */ |
| #define MACSEC_TAG_LEN 6 |
| |
| struct macsec_eth_header { |
| struct ethhdr eth; |
| /* SecTAG */ |
| u8 tci_an; |
| #if defined(__LITTLE_ENDIAN_BITFIELD) |
| u8 short_length:6, |
| unused:2; |
| #elif defined(__BIG_ENDIAN_BITFIELD) |
| u8 unused:2, |
| short_length:6; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| __be32 packet_number; |
| u8 secure_channel_id[8]; /* optional */ |
| } __packed; |
| |
| /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */ |
| #define MIN_NON_SHORT_LEN 48 |
| |
| #define GCM_AES_IV_LEN 12 |
| |
| #define for_each_rxsc(secy, sc) \ |
| for (sc = rcu_dereference_bh(secy->rx_sc); \ |
| sc; \ |
| sc = rcu_dereference_bh(sc->next)) |
| #define for_each_rxsc_rtnl(secy, sc) \ |
| for (sc = rtnl_dereference(secy->rx_sc); \ |
| sc; \ |
| sc = rtnl_dereference(sc->next)) |
| |
| #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31))) |
| |
| struct gcm_iv_xpn { |
| union { |
| u8 short_secure_channel_id[4]; |
| ssci_t ssci; |
| }; |
| __be64 pn; |
| } __packed; |
| |
| struct gcm_iv { |
| union { |
| u8 secure_channel_id[8]; |
| sci_t sci; |
| }; |
| __be32 pn; |
| }; |
| |
| #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT |
| |
| struct pcpu_secy_stats { |
| struct macsec_dev_stats stats; |
| struct u64_stats_sync syncp; |
| }; |
| |
| /** |
| * struct macsec_dev - private data |
| * @secy: SecY config |
| * @real_dev: pointer to underlying netdevice |
| * @dev_tracker: refcount tracker for @real_dev reference |
| * @stats: MACsec device stats |
| * @secys: linked list of SecY's on the underlying device |
| * @gro_cells: pointer to the Generic Receive Offload cell |
| * @offload: status of offloading on the MACsec device |
| */ |
| struct macsec_dev { |
| struct macsec_secy secy; |
| struct net_device *real_dev; |
| netdevice_tracker dev_tracker; |
| struct pcpu_secy_stats __percpu *stats; |
| struct list_head secys; |
| struct gro_cells gro_cells; |
| enum macsec_offload offload; |
| }; |
| |
| /** |
| * struct macsec_rxh_data - rx_handler private argument |
| * @secys: linked list of SecY's on this underlying device |
| */ |
| struct macsec_rxh_data { |
| struct list_head secys; |
| }; |
| |
| static struct macsec_dev *macsec_priv(const struct net_device *dev) |
| { |
| return (struct macsec_dev *)netdev_priv(dev); |
| } |
| |
| static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev) |
| { |
| return rcu_dereference_bh(dev->rx_handler_data); |
| } |
| |
| static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev) |
| { |
| return rtnl_dereference(dev->rx_handler_data); |
| } |
| |
| struct macsec_cb { |
| struct aead_request *req; |
| union { |
| struct macsec_tx_sa *tx_sa; |
| struct macsec_rx_sa *rx_sa; |
| }; |
| u8 assoc_num; |
| bool valid; |
| bool has_sci; |
| }; |
| |
| static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr) |
| { |
| struct macsec_rx_sa *sa = rcu_dereference_bh(ptr); |
| |
| if (!sa || !sa->active) |
| return NULL; |
| |
| if (!refcount_inc_not_zero(&sa->refcnt)) |
| return NULL; |
| |
| return sa; |
| } |
| |
| static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc) |
| { |
| struct macsec_rx_sa *sa = NULL; |
| int an; |
| |
| for (an = 0; an < MACSEC_NUM_AN; an++) { |
| sa = macsec_rxsa_get(rx_sc->sa[an]); |
| if (sa) |
| break; |
| } |
| return sa; |
| } |
| |
| static void free_rx_sc_rcu(struct rcu_head *head) |
| { |
| struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head); |
| |
| free_percpu(rx_sc->stats); |
| kfree(rx_sc); |
| } |
| |
| static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc) |
| { |
| return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL; |
| } |
| |
| static void macsec_rxsc_put(struct macsec_rx_sc *sc) |
| { |
| if (refcount_dec_and_test(&sc->refcnt)) |
| call_rcu(&sc->rcu_head, free_rx_sc_rcu); |
| } |
| |
| static void free_rxsa(struct rcu_head *head) |
| { |
| struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu); |
| |
| crypto_free_aead(sa->key.tfm); |
| free_percpu(sa->stats); |
| kfree(sa); |
| } |
| |
| static void macsec_rxsa_put(struct macsec_rx_sa *sa) |
| { |
| if (refcount_dec_and_test(&sa->refcnt)) |
| call_rcu(&sa->rcu, free_rxsa); |
| } |
| |
| static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr) |
| { |
| struct macsec_tx_sa *sa = rcu_dereference_bh(ptr); |
| |
| if (!sa || !sa->active) |
| return NULL; |
| |
| if (!refcount_inc_not_zero(&sa->refcnt)) |
| return NULL; |
| |
| return sa; |
| } |
| |
| static void free_txsa(struct rcu_head *head) |
| { |
| struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu); |
| |
| crypto_free_aead(sa->key.tfm); |
| free_percpu(sa->stats); |
| kfree(sa); |
| } |
| |
| static void macsec_txsa_put(struct macsec_tx_sa *sa) |
| { |
| if (refcount_dec_and_test(&sa->refcnt)) |
| call_rcu(&sa->rcu, free_txsa); |
| } |
| |
| static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) |
| { |
| BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb)); |
| return (struct macsec_cb *)skb->cb; |
| } |
| |
| #define MACSEC_PORT_SCB (0x0000) |
| #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL) |
| #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff) |
| |
| #define MACSEC_GCM_AES_128_SAK_LEN 16 |
| #define MACSEC_GCM_AES_256_SAK_LEN 32 |
| |
| #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN |
| #define DEFAULT_XPN false |
| #define DEFAULT_SEND_SCI true |
| #define DEFAULT_ENCRYPT false |
| #define DEFAULT_ENCODING_SA 0 |
| #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1)) |
| |
| static sci_t make_sci(const u8 *addr, __be16 port) |
| { |
| sci_t sci; |
| |
| memcpy(&sci, addr, ETH_ALEN); |
| memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port)); |
| |
| return sci; |
| } |
| |
| static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present) |
| { |
| sci_t sci; |
| |
| if (sci_present) |
| memcpy(&sci, hdr->secure_channel_id, |
| sizeof(hdr->secure_channel_id)); |
| else |
| sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES); |
| |
| return sci; |
| } |
| |
| static unsigned int macsec_sectag_len(bool sci_present) |
| { |
| return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0); |
| } |
| |
| static unsigned int macsec_hdr_len(bool sci_present) |
| { |
| return macsec_sectag_len(sci_present) + ETH_HLEN; |
| } |
| |
| static unsigned int macsec_extra_len(bool sci_present) |
| { |
| return macsec_sectag_len(sci_present) + sizeof(__be16); |
| } |
| |
| /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */ |
| static void macsec_fill_sectag(struct macsec_eth_header *h, |
| const struct macsec_secy *secy, u32 pn, |
| bool sci_present) |
| { |
| const struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
| |
| memset(&h->tci_an, 0, macsec_sectag_len(sci_present)); |
| h->eth.h_proto = htons(ETH_P_MACSEC); |
| |
| if (sci_present) { |
| h->tci_an |= MACSEC_TCI_SC; |
| memcpy(&h->secure_channel_id, &secy->sci, |
| sizeof(h->secure_channel_id)); |
| } else { |
| if (tx_sc->end_station) |
| h->tci_an |= MACSEC_TCI_ES; |
| if (tx_sc->scb) |
| h->tci_an |= MACSEC_TCI_SCB; |
| } |
| |
| h->packet_number = htonl(pn); |
| |
| /* with GCM, C/E clear for !encrypt, both set for encrypt */ |
| if (tx_sc->encrypt) |
| h->tci_an |= MACSEC_TCI_CONFID; |
| else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN) |
| h->tci_an |= MACSEC_TCI_C; |
| |
| h->tci_an |= tx_sc->encoding_sa; |
| } |
| |
| static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len) |
| { |
| if (data_len < MIN_NON_SHORT_LEN) |
| h->short_length = data_len; |
| } |
| |
| /* Checks if a MACsec interface is being offloaded to an hardware engine */ |
| static bool macsec_is_offloaded(struct macsec_dev *macsec) |
| { |
| if (macsec->offload == MACSEC_OFFLOAD_MAC || |
| macsec->offload == MACSEC_OFFLOAD_PHY) |
| return true; |
| |
| return false; |
| } |
| |
| /* Checks if underlying layers implement MACsec offloading functions. */ |
| static bool macsec_check_offload(enum macsec_offload offload, |
| struct macsec_dev *macsec) |
| { |
| if (!macsec || !macsec->real_dev) |
| return false; |
| |
| if (offload == MACSEC_OFFLOAD_PHY) |
| return macsec->real_dev->phydev && |
| macsec->real_dev->phydev->macsec_ops; |
| else if (offload == MACSEC_OFFLOAD_MAC) |
| return macsec->real_dev->features & NETIF_F_HW_MACSEC && |
| macsec->real_dev->macsec_ops; |
| |
| return false; |
| } |
| |
| static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload, |
| struct macsec_dev *macsec, |
| struct macsec_context *ctx) |
| { |
| if (ctx) { |
| memset(ctx, 0, sizeof(*ctx)); |
| ctx->offload = offload; |
| |
| if (offload == MACSEC_OFFLOAD_PHY) |
| ctx->phydev = macsec->real_dev->phydev; |
| else if (offload == MACSEC_OFFLOAD_MAC) |
| ctx->netdev = macsec->real_dev; |
| } |
| |
| if (offload == MACSEC_OFFLOAD_PHY) |
| return macsec->real_dev->phydev->macsec_ops; |
| else |
| return macsec->real_dev->macsec_ops; |
| } |
| |
| /* Returns a pointer to the MACsec ops struct if any and updates the MACsec |
| * context device reference if provided. |
| */ |
| static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec, |
| struct macsec_context *ctx) |
| { |
| if (!macsec_check_offload(macsec->offload, macsec)) |
| return NULL; |
| |
| return __macsec_get_ops(macsec->offload, macsec, ctx); |
| } |
| |
| /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */ |
| static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn) |
| { |
| struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data; |
| int len = skb->len - 2 * ETH_ALEN; |
| int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len; |
| |
| /* a) It comprises at least 17 octets */ |
| if (skb->len <= 16) |
| return false; |
| |
| /* b) MACsec EtherType: already checked */ |
| |
| /* c) V bit is clear */ |
| if (h->tci_an & MACSEC_TCI_VERSION) |
| return false; |
| |
| /* d) ES or SCB => !SC */ |
| if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) && |
| (h->tci_an & MACSEC_TCI_SC)) |
| return false; |
| |
| /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */ |
| if (h->unused) |
| return false; |
| |
| /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */ |
| if (!h->packet_number && !xpn) |
| return false; |
| |
| /* length check, f) g) h) i) */ |
| if (h->short_length) |
| return len == extra_len + h->short_length; |
| return len >= extra_len + MIN_NON_SHORT_LEN; |
| } |
| |
| #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true)) |
| #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN |
| |
| static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn, |
| salt_t salt) |
| { |
| struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv; |
| |
| gcm_iv->ssci = ssci ^ salt.ssci; |
| gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn; |
| } |
| |
| static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn) |
| { |
| struct gcm_iv *gcm_iv = (struct gcm_iv *)iv; |
| |
| gcm_iv->sci = sci; |
| gcm_iv->pn = htonl(pn); |
| } |
| |
| static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) |
| { |
| return (struct macsec_eth_header *)skb_mac_header(skb); |
| } |
| |
| static void __macsec_pn_wrapped(struct macsec_secy *secy, |
| struct macsec_tx_sa *tx_sa) |
| { |
| pr_debug("PN wrapped, transitioning to !oper\n"); |
| tx_sa->active = false; |
| if (secy->protect_frames) |
| secy->operational = false; |
| } |
| |
| void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa) |
| { |
| spin_lock_bh(&tx_sa->lock); |
| __macsec_pn_wrapped(secy, tx_sa); |
| spin_unlock_bh(&tx_sa->lock); |
| } |
| EXPORT_SYMBOL_GPL(macsec_pn_wrapped); |
| |
| static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa, |
| struct macsec_secy *secy) |
| { |
| pn_t pn; |
| |
| spin_lock_bh(&tx_sa->lock); |
| |
| pn = tx_sa->next_pn_halves; |
| if (secy->xpn) |
| tx_sa->next_pn++; |
| else |
| tx_sa->next_pn_halves.lower++; |
| |
| if (tx_sa->next_pn == 0) |
| __macsec_pn_wrapped(secy, tx_sa); |
| spin_unlock_bh(&tx_sa->lock); |
| |
| return pn; |
| } |
| |
| static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct macsec_dev *macsec = netdev_priv(dev); |
| |
| skb->dev = macsec->real_dev; |
| skb_reset_mac_header(skb); |
| skb->protocol = eth_hdr(skb)->h_proto; |
| } |
| |
| static unsigned int macsec_msdu_len(struct sk_buff *skb) |
| { |
| struct macsec_dev *macsec = macsec_priv(skb->dev); |
| struct macsec_secy *secy = &macsec->secy; |
| bool sci_present = macsec_skb_cb(skb)->has_sci; |
| |
| return skb->len - macsec_hdr_len(sci_present) - secy->icv_len; |
| } |
| |
| static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc, |
| struct macsec_tx_sa *tx_sa) |
| { |
| unsigned int msdu_len = macsec_msdu_len(skb); |
| struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats); |
| |
| u64_stats_update_begin(&txsc_stats->syncp); |
| if (tx_sc->encrypt) { |
| txsc_stats->stats.OutOctetsEncrypted += msdu_len; |
| txsc_stats->stats.OutPktsEncrypted++; |
| this_cpu_inc(tx_sa->stats->OutPktsEncrypted); |
| } else { |
| txsc_stats->stats.OutOctetsProtected += msdu_len; |
| txsc_stats->stats.OutPktsProtected++; |
| this_cpu_inc(tx_sa->stats->OutPktsProtected); |
| } |
| u64_stats_update_end(&txsc_stats->syncp); |
| } |
| |
| static void count_tx(struct net_device *dev, int ret, int len) |
| { |
| if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) |
| dev_sw_netstats_tx_add(dev, 1, len); |
| } |
| |
| static void macsec_encrypt_done(void *data, int err) |
| { |
| struct sk_buff *skb = data; |
| struct net_device *dev = skb->dev; |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa; |
| int len, ret; |
| |
| aead_request_free(macsec_skb_cb(skb)->req); |
| |
| rcu_read_lock_bh(); |
| macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); |
| /* packet is encrypted/protected so tx_bytes must be calculated */ |
| len = macsec_msdu_len(skb) + 2 * ETH_ALEN; |
| macsec_encrypt_finish(skb, dev); |
| ret = dev_queue_xmit(skb); |
| count_tx(dev, ret, len); |
| rcu_read_unlock_bh(); |
| |
| macsec_txsa_put(sa); |
| dev_put(dev); |
| } |
| |
| static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm, |
| unsigned char **iv, |
| struct scatterlist **sg, |
| int num_frags) |
| { |
| size_t size, iv_offset, sg_offset; |
| struct aead_request *req; |
| void *tmp; |
| |
| size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm); |
| iv_offset = size; |
| size += GCM_AES_IV_LEN; |
| |
| size = ALIGN(size, __alignof__(struct scatterlist)); |
| sg_offset = size; |
| size += sizeof(struct scatterlist) * num_frags; |
| |
| tmp = kmalloc(size, GFP_ATOMIC); |
| if (!tmp) |
| return NULL; |
| |
| *iv = (unsigned char *)(tmp + iv_offset); |
| *sg = (struct scatterlist *)(tmp + sg_offset); |
| req = tmp; |
| |
| aead_request_set_tfm(req, tfm); |
| |
| return req; |
| } |
| |
| static struct sk_buff *macsec_encrypt(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| int ret; |
| struct scatterlist *sg; |
| struct sk_buff *trailer; |
| unsigned char *iv; |
| struct ethhdr *eth; |
| struct macsec_eth_header *hh; |
| size_t unprotected_len; |
| struct aead_request *req; |
| struct macsec_secy *secy; |
| struct macsec_tx_sc *tx_sc; |
| struct macsec_tx_sa *tx_sa; |
| struct macsec_dev *macsec = macsec_priv(dev); |
| bool sci_present; |
| pn_t pn; |
| |
| secy = &macsec->secy; |
| tx_sc = &secy->tx_sc; |
| |
| /* 10.5.1 TX SA assignment */ |
| tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]); |
| if (!tx_sa) { |
| secy->operational = false; |
| kfree_skb(skb); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM || |
| skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) { |
| struct sk_buff *nskb = skb_copy_expand(skb, |
| MACSEC_NEEDED_HEADROOM, |
| MACSEC_NEEDED_TAILROOM, |
| GFP_ATOMIC); |
| if (likely(nskb)) { |
| consume_skb(skb); |
| skb = nskb; |
| } else { |
| macsec_txsa_put(tx_sa); |
| kfree_skb(skb); |
| return ERR_PTR(-ENOMEM); |
| } |
| } else { |
| skb = skb_unshare(skb, GFP_ATOMIC); |
| if (!skb) { |
| macsec_txsa_put(tx_sa); |
| return ERR_PTR(-ENOMEM); |
| } |
| } |
| |
| unprotected_len = skb->len; |
| eth = eth_hdr(skb); |
| sci_present = macsec_send_sci(secy); |
| hh = skb_push(skb, macsec_extra_len(sci_present)); |
| memmove(hh, eth, 2 * ETH_ALEN); |
| |
| pn = tx_sa_update_pn(tx_sa, secy); |
| if (pn.full64 == 0) { |
| macsec_txsa_put(tx_sa); |
| kfree_skb(skb); |
| return ERR_PTR(-ENOLINK); |
| } |
| macsec_fill_sectag(hh, secy, pn.lower, sci_present); |
| macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN); |
| |
| skb_put(skb, secy->icv_len); |
| |
| if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) { |
| struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
| |
| u64_stats_update_begin(&secy_stats->syncp); |
| secy_stats->stats.OutPktsTooLong++; |
| u64_stats_update_end(&secy_stats->syncp); |
| |
| macsec_txsa_put(tx_sa); |
| kfree_skb(skb); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| ret = skb_cow_data(skb, 0, &trailer); |
| if (unlikely(ret < 0)) { |
| macsec_txsa_put(tx_sa); |
| kfree_skb(skb); |
| return ERR_PTR(ret); |
| } |
| |
| req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret); |
| if (!req) { |
| macsec_txsa_put(tx_sa); |
| kfree_skb(skb); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| if (secy->xpn) |
| macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt); |
| else |
| macsec_fill_iv(iv, secy->sci, pn.lower); |
| |
| sg_init_table(sg, ret); |
| ret = skb_to_sgvec(skb, sg, 0, skb->len); |
| if (unlikely(ret < 0)) { |
| aead_request_free(req); |
| macsec_txsa_put(tx_sa); |
| kfree_skb(skb); |
| return ERR_PTR(ret); |
| } |
| |
| if (tx_sc->encrypt) { |
| int len = skb->len - macsec_hdr_len(sci_present) - |
| secy->icv_len; |
| aead_request_set_crypt(req, sg, sg, len, iv); |
| aead_request_set_ad(req, macsec_hdr_len(sci_present)); |
| } else { |
| aead_request_set_crypt(req, sg, sg, 0, iv); |
| aead_request_set_ad(req, skb->len - secy->icv_len); |
| } |
| |
| macsec_skb_cb(skb)->req = req; |
| macsec_skb_cb(skb)->tx_sa = tx_sa; |
| macsec_skb_cb(skb)->has_sci = sci_present; |
| aead_request_set_callback(req, 0, macsec_encrypt_done, skb); |
| |
| dev_hold(skb->dev); |
| ret = crypto_aead_encrypt(req); |
| if (ret == -EINPROGRESS) { |
| return ERR_PTR(ret); |
| } else if (ret != 0) { |
| dev_put(skb->dev); |
| kfree_skb(skb); |
| aead_request_free(req); |
| macsec_txsa_put(tx_sa); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| dev_put(skb->dev); |
| aead_request_free(req); |
| macsec_txsa_put(tx_sa); |
| |
| return skb; |
| } |
| |
| static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn) |
| { |
| struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; |
| struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats); |
| struct macsec_eth_header *hdr = macsec_ethhdr(skb); |
| u32 lowest_pn = 0; |
| |
| spin_lock(&rx_sa->lock); |
| if (rx_sa->next_pn_halves.lower >= secy->replay_window) |
| lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window; |
| |
| /* Now perform replay protection check again |
| * (see IEEE 802.1AE-2006 figure 10-5) |
| */ |
| if (secy->replay_protect && pn < lowest_pn && |
| (!secy->xpn || pn_same_half(pn, lowest_pn))) { |
| spin_unlock(&rx_sa->lock); |
| u64_stats_update_begin(&rxsc_stats->syncp); |
| rxsc_stats->stats.InPktsLate++; |
| u64_stats_update_end(&rxsc_stats->syncp); |
| DEV_STATS_INC(secy->netdev, rx_dropped); |
| return false; |
| } |
| |
| if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) { |
| unsigned int msdu_len = macsec_msdu_len(skb); |
| u64_stats_update_begin(&rxsc_stats->syncp); |
| if (hdr->tci_an & MACSEC_TCI_E) |
| rxsc_stats->stats.InOctetsDecrypted += msdu_len; |
| else |
| rxsc_stats->stats.InOctetsValidated += msdu_len; |
| u64_stats_update_end(&rxsc_stats->syncp); |
| } |
| |
| if (!macsec_skb_cb(skb)->valid) { |
| spin_unlock(&rx_sa->lock); |
| |
| /* 10.6.5 */ |
| if (hdr->tci_an & MACSEC_TCI_C || |
| secy->validate_frames == MACSEC_VALIDATE_STRICT) { |
| u64_stats_update_begin(&rxsc_stats->syncp); |
| rxsc_stats->stats.InPktsNotValid++; |
| u64_stats_update_end(&rxsc_stats->syncp); |
| this_cpu_inc(rx_sa->stats->InPktsNotValid); |
| DEV_STATS_INC(secy->netdev, rx_errors); |
| return false; |
| } |
| |
| u64_stats_update_begin(&rxsc_stats->syncp); |
| if (secy->validate_frames == MACSEC_VALIDATE_CHECK) { |
| rxsc_stats->stats.InPktsInvalid++; |
| this_cpu_inc(rx_sa->stats->InPktsInvalid); |
| } else if (pn < lowest_pn) { |
| rxsc_stats->stats.InPktsDelayed++; |
| } else { |
| rxsc_stats->stats.InPktsUnchecked++; |
| } |
| u64_stats_update_end(&rxsc_stats->syncp); |
| } else { |
| u64_stats_update_begin(&rxsc_stats->syncp); |
| if (pn < lowest_pn) { |
| rxsc_stats->stats.InPktsDelayed++; |
| } else { |
| rxsc_stats->stats.InPktsOK++; |
| this_cpu_inc(rx_sa->stats->InPktsOK); |
| } |
| u64_stats_update_end(&rxsc_stats->syncp); |
| |
| // Instead of "pn >=" - to support pn overflow in xpn |
| if (pn + 1 > rx_sa->next_pn_halves.lower) { |
| rx_sa->next_pn_halves.lower = pn + 1; |
| } else if (secy->xpn && |
| !pn_same_half(pn, rx_sa->next_pn_halves.lower)) { |
| rx_sa->next_pn_halves.upper++; |
| rx_sa->next_pn_halves.lower = pn + 1; |
| } |
| |
| spin_unlock(&rx_sa->lock); |
| } |
| |
| return true; |
| } |
| |
| static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev) |
| { |
| skb->pkt_type = PACKET_HOST; |
| skb->protocol = eth_type_trans(skb, dev); |
| |
| skb_reset_network_header(skb); |
| if (!skb_transport_header_was_set(skb)) |
| skb_reset_transport_header(skb); |
| skb_reset_mac_len(skb); |
| } |
| |
| static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len) |
| { |
| skb->ip_summed = CHECKSUM_NONE; |
| memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN); |
| skb_pull(skb, hdr_len); |
| pskb_trim_unique(skb, skb->len - icv_len); |
| } |
| |
| static void count_rx(struct net_device *dev, int len) |
| { |
| dev_sw_netstats_rx_add(dev, len); |
| } |
| |
| static void macsec_decrypt_done(void *data, int err) |
| { |
| struct sk_buff *skb = data; |
| struct net_device *dev = skb->dev; |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa; |
| struct macsec_rx_sc *rx_sc = rx_sa->sc; |
| int len; |
| u32 pn; |
| |
| aead_request_free(macsec_skb_cb(skb)->req); |
| |
| if (!err) |
| macsec_skb_cb(skb)->valid = true; |
| |
| rcu_read_lock_bh(); |
| pn = ntohl(macsec_ethhdr(skb)->packet_number); |
| if (!macsec_post_decrypt(skb, &macsec->secy, pn)) { |
| rcu_read_unlock_bh(); |
| kfree_skb(skb); |
| goto out; |
| } |
| |
| macsec_finalize_skb(skb, macsec->secy.icv_len, |
| macsec_extra_len(macsec_skb_cb(skb)->has_sci)); |
| len = skb->len; |
| macsec_reset_skb(skb, macsec->secy.netdev); |
| |
| if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS) |
| count_rx(dev, len); |
| |
| rcu_read_unlock_bh(); |
| |
| out: |
| macsec_rxsa_put(rx_sa); |
| macsec_rxsc_put(rx_sc); |
| dev_put(dev); |
| } |
| |
| static struct sk_buff *macsec_decrypt(struct sk_buff *skb, |
| struct net_device *dev, |
| struct macsec_rx_sa *rx_sa, |
| sci_t sci, |
| struct macsec_secy *secy) |
| { |
| int ret; |
| struct scatterlist *sg; |
| struct sk_buff *trailer; |
| unsigned char *iv; |
| struct aead_request *req; |
| struct macsec_eth_header *hdr; |
| u32 hdr_pn; |
| u16 icv_len = secy->icv_len; |
| |
| macsec_skb_cb(skb)->valid = false; |
| skb = skb_share_check(skb, GFP_ATOMIC); |
| if (!skb) |
| return ERR_PTR(-ENOMEM); |
| |
| ret = skb_cow_data(skb, 0, &trailer); |
| if (unlikely(ret < 0)) { |
| kfree_skb(skb); |
| return ERR_PTR(ret); |
| } |
| req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret); |
| if (!req) { |
| kfree_skb(skb); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| hdr = (struct macsec_eth_header *)skb->data; |
| hdr_pn = ntohl(hdr->packet_number); |
| |
| if (secy->xpn) { |
| pn_t recovered_pn = rx_sa->next_pn_halves; |
| |
| recovered_pn.lower = hdr_pn; |
| if (hdr_pn < rx_sa->next_pn_halves.lower && |
| !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower)) |
| recovered_pn.upper++; |
| |
| macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64, |
| rx_sa->key.salt); |
| } else { |
| macsec_fill_iv(iv, sci, hdr_pn); |
| } |
| |
| sg_init_table(sg, ret); |
| ret = skb_to_sgvec(skb, sg, 0, skb->len); |
| if (unlikely(ret < 0)) { |
| aead_request_free(req); |
| kfree_skb(skb); |
| return ERR_PTR(ret); |
| } |
| |
| if (hdr->tci_an & MACSEC_TCI_E) { |
| /* confidentiality: ethernet + macsec header |
| * authenticated, encrypted payload |
| */ |
| int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci); |
| |
| aead_request_set_crypt(req, sg, sg, len, iv); |
| aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci)); |
| skb = skb_unshare(skb, GFP_ATOMIC); |
| if (!skb) { |
| aead_request_free(req); |
| return ERR_PTR(-ENOMEM); |
| } |
| } else { |
| /* integrity only: all headers + data authenticated */ |
| aead_request_set_crypt(req, sg, sg, icv_len, iv); |
| aead_request_set_ad(req, skb->len - icv_len); |
| } |
| |
| macsec_skb_cb(skb)->req = req; |
| skb->dev = dev; |
| aead_request_set_callback(req, 0, macsec_decrypt_done, skb); |
| |
| dev_hold(dev); |
| ret = crypto_aead_decrypt(req); |
| if (ret == -EINPROGRESS) { |
| return ERR_PTR(ret); |
| } else if (ret != 0) { |
| /* decryption/authentication failed |
| * 10.6 if validateFrames is disabled, deliver anyway |
| */ |
| if (ret != -EBADMSG) { |
| kfree_skb(skb); |
| skb = ERR_PTR(ret); |
| } |
| } else { |
| macsec_skb_cb(skb)->valid = true; |
| } |
| dev_put(dev); |
| |
| aead_request_free(req); |
| |
| return skb; |
| } |
| |
| static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci) |
| { |
| struct macsec_rx_sc *rx_sc; |
| |
| for_each_rxsc(secy, rx_sc) { |
| if (rx_sc->sci == sci) |
| return rx_sc; |
| } |
| |
| return NULL; |
| } |
| |
| static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci) |
| { |
| struct macsec_rx_sc *rx_sc; |
| |
| for_each_rxsc_rtnl(secy, rx_sc) { |
| if (rx_sc->sci == sci) |
| return rx_sc; |
| } |
| |
| return NULL; |
| } |
| |
| static enum rx_handler_result handle_not_macsec(struct sk_buff *skb) |
| { |
| /* Deliver to the uncontrolled port by default */ |
| enum rx_handler_result ret = RX_HANDLER_PASS; |
| struct ethhdr *hdr = eth_hdr(skb); |
| struct metadata_dst *md_dst; |
| struct macsec_rxh_data *rxd; |
| struct macsec_dev *macsec; |
| |
| rcu_read_lock(); |
| rxd = macsec_data_rcu(skb->dev); |
| md_dst = skb_metadata_dst(skb); |
| |
| list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
| struct sk_buff *nskb; |
| struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats); |
| struct net_device *ndev = macsec->secy.netdev; |
| |
| /* If h/w offloading is enabled, HW decodes frames and strips |
| * the SecTAG, so we have to deduce which port to deliver to. |
| */ |
| if (macsec_is_offloaded(macsec) && netif_running(ndev)) { |
| struct macsec_rx_sc *rx_sc = NULL; |
| |
| if (md_dst && md_dst->type == METADATA_MACSEC) |
| rx_sc = find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci); |
| |
| if (md_dst && md_dst->type == METADATA_MACSEC && !rx_sc) |
| continue; |
| |
| if (ether_addr_equal_64bits(hdr->h_dest, |
| ndev->dev_addr)) { |
| /* exact match, divert skb to this port */ |
| skb->dev = ndev; |
| skb->pkt_type = PACKET_HOST; |
| ret = RX_HANDLER_ANOTHER; |
| goto out; |
| } else if (is_multicast_ether_addr_64bits( |
| hdr->h_dest)) { |
| /* multicast frame, deliver on this port too */ |
| nskb = skb_clone(skb, GFP_ATOMIC); |
| if (!nskb) |
| break; |
| |
| nskb->dev = ndev; |
| if (ether_addr_equal_64bits(hdr->h_dest, |
| ndev->broadcast)) |
| nskb->pkt_type = PACKET_BROADCAST; |
| else |
| nskb->pkt_type = PACKET_MULTICAST; |
| |
| __netif_rx(nskb); |
| } else if (rx_sc || ndev->flags & IFF_PROMISC) { |
| skb->dev = ndev; |
| skb->pkt_type = PACKET_HOST; |
| ret = RX_HANDLER_ANOTHER; |
| goto out; |
| } |
| |
| continue; |
| } |
| |
| /* 10.6 If the management control validateFrames is not |
| * Strict, frames without a SecTAG are received, counted, and |
| * delivered to the Controlled Port |
| */ |
| if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { |
| u64_stats_update_begin(&secy_stats->syncp); |
| secy_stats->stats.InPktsNoTag++; |
| u64_stats_update_end(&secy_stats->syncp); |
| DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
| continue; |
| } |
| |
| /* deliver on this port */ |
| nskb = skb_clone(skb, GFP_ATOMIC); |
| if (!nskb) |
| break; |
| |
| nskb->dev = ndev; |
| |
| if (__netif_rx(nskb) == NET_RX_SUCCESS) { |
| u64_stats_update_begin(&secy_stats->syncp); |
| secy_stats->stats.InPktsUntagged++; |
| u64_stats_update_end(&secy_stats->syncp); |
| } |
| } |
| |
| out: |
| rcu_read_unlock(); |
| return ret; |
| } |
| |
| static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) |
| { |
| struct sk_buff *skb = *pskb; |
| struct net_device *dev = skb->dev; |
| struct macsec_eth_header *hdr; |
| struct macsec_secy *secy = NULL; |
| struct macsec_rx_sc *rx_sc; |
| struct macsec_rx_sa *rx_sa; |
| struct macsec_rxh_data *rxd; |
| struct macsec_dev *macsec; |
| unsigned int len; |
| sci_t sci; |
| u32 hdr_pn; |
| bool cbit; |
| struct pcpu_rx_sc_stats *rxsc_stats; |
| struct pcpu_secy_stats *secy_stats; |
| bool pulled_sci; |
| int ret; |
| |
| if (skb_headroom(skb) < ETH_HLEN) |
| goto drop_direct; |
| |
| hdr = macsec_ethhdr(skb); |
| if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) |
| return handle_not_macsec(skb); |
| |
| skb = skb_unshare(skb, GFP_ATOMIC); |
| *pskb = skb; |
| if (!skb) |
| return RX_HANDLER_CONSUMED; |
| |
| pulled_sci = pskb_may_pull(skb, macsec_extra_len(true)); |
| if (!pulled_sci) { |
| if (!pskb_may_pull(skb, macsec_extra_len(false))) |
| goto drop_direct; |
| } |
| |
| hdr = macsec_ethhdr(skb); |
| |
| /* Frames with a SecTAG that has the TCI E bit set but the C |
| * bit clear are discarded, as this reserved encoding is used |
| * to identify frames with a SecTAG that are not to be |
| * delivered to the Controlled Port. |
| */ |
| if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E) |
| return RX_HANDLER_PASS; |
| |
| /* now, pull the extra length */ |
| if (hdr->tci_an & MACSEC_TCI_SC) { |
| if (!pulled_sci) |
| goto drop_direct; |
| } |
| |
| /* ethernet header is part of crypto processing */ |
| skb_push(skb, ETH_HLEN); |
| |
| macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC); |
| macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK; |
| sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci); |
| |
| rcu_read_lock(); |
| rxd = macsec_data_rcu(skb->dev); |
| |
| list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
| struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci); |
| |
| sc = sc ? macsec_rxsc_get(sc) : NULL; |
| |
| if (sc) { |
| secy = &macsec->secy; |
| rx_sc = sc; |
| break; |
| } |
| } |
| |
| if (!secy) |
| goto nosci; |
| |
| dev = secy->netdev; |
| macsec = macsec_priv(dev); |
| secy_stats = this_cpu_ptr(macsec->stats); |
| rxsc_stats = this_cpu_ptr(rx_sc->stats); |
| |
| if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) { |
| u64_stats_update_begin(&secy_stats->syncp); |
| secy_stats->stats.InPktsBadTag++; |
| u64_stats_update_end(&secy_stats->syncp); |
| DEV_STATS_INC(secy->netdev, rx_errors); |
| goto drop_nosa; |
| } |
| |
| rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]); |
| if (!rx_sa) { |
| /* 10.6.1 if the SA is not in use */ |
| |
| /* If validateFrames is Strict or the C bit in the |
| * SecTAG is set, discard |
| */ |
| struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc); |
| if (hdr->tci_an & MACSEC_TCI_C || |
| secy->validate_frames == MACSEC_VALIDATE_STRICT) { |
| u64_stats_update_begin(&rxsc_stats->syncp); |
| rxsc_stats->stats.InPktsNotUsingSA++; |
| u64_stats_update_end(&rxsc_stats->syncp); |
| DEV_STATS_INC(secy->netdev, rx_errors); |
| if (active_rx_sa) |
| this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA); |
| goto drop_nosa; |
| } |
| |
| /* not Strict, the frame (with the SecTAG and ICV |
| * removed) is delivered to the Controlled Port. |
| */ |
| u64_stats_update_begin(&rxsc_stats->syncp); |
| rxsc_stats->stats.InPktsUnusedSA++; |
| u64_stats_update_end(&rxsc_stats->syncp); |
| if (active_rx_sa) |
| this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA); |
| goto deliver; |
| } |
| |
| /* First, PN check to avoid decrypting obviously wrong packets */ |
| hdr_pn = ntohl(hdr->packet_number); |
| if (secy->replay_protect) { |
| bool late; |
| |
| spin_lock(&rx_sa->lock); |
| late = rx_sa->next_pn_halves.lower >= secy->replay_window && |
| hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window); |
| |
| if (secy->xpn) |
| late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn); |
| spin_unlock(&rx_sa->lock); |
| |
| if (late) { |
| u64_stats_update_begin(&rxsc_stats->syncp); |
| rxsc_stats->stats.InPktsLate++; |
| u64_stats_update_end(&rxsc_stats->syncp); |
| DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
| goto drop; |
| } |
| } |
| |
| macsec_skb_cb(skb)->rx_sa = rx_sa; |
| |
| /* Disabled && !changed text => skip validation */ |
| if (hdr->tci_an & MACSEC_TCI_C || |
| secy->validate_frames != MACSEC_VALIDATE_DISABLED) |
| skb = macsec_decrypt(skb, dev, rx_sa, sci, secy); |
| |
| if (IS_ERR(skb)) { |
| /* the decrypt callback needs the reference */ |
| if (PTR_ERR(skb) != -EINPROGRESS) { |
| macsec_rxsa_put(rx_sa); |
| macsec_rxsc_put(rx_sc); |
| } |
| rcu_read_unlock(); |
| *pskb = NULL; |
| return RX_HANDLER_CONSUMED; |
| } |
| |
| if (!macsec_post_decrypt(skb, secy, hdr_pn)) |
| goto drop; |
| |
| deliver: |
| macsec_finalize_skb(skb, secy->icv_len, |
| macsec_extra_len(macsec_skb_cb(skb)->has_sci)); |
| len = skb->len; |
| macsec_reset_skb(skb, secy->netdev); |
| |
| if (rx_sa) |
| macsec_rxsa_put(rx_sa); |
| macsec_rxsc_put(rx_sc); |
| |
| skb_orphan(skb); |
| ret = gro_cells_receive(&macsec->gro_cells, skb); |
| if (ret == NET_RX_SUCCESS) |
| count_rx(dev, len); |
| else |
| DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
| |
| rcu_read_unlock(); |
| |
| *pskb = NULL; |
| return RX_HANDLER_CONSUMED; |
| |
| drop: |
| macsec_rxsa_put(rx_sa); |
| drop_nosa: |
| macsec_rxsc_put(rx_sc); |
| rcu_read_unlock(); |
| drop_direct: |
| kfree_skb(skb); |
| *pskb = NULL; |
| return RX_HANDLER_CONSUMED; |
| |
| nosci: |
| /* 10.6.1 if the SC is not found */ |
| cbit = !!(hdr->tci_an & MACSEC_TCI_C); |
| if (!cbit) |
| macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN, |
| macsec_extra_len(macsec_skb_cb(skb)->has_sci)); |
| |
| list_for_each_entry_rcu(macsec, &rxd->secys, secys) { |
| struct sk_buff *nskb; |
| |
| secy_stats = this_cpu_ptr(macsec->stats); |
| |
| /* If validateFrames is Strict or the C bit in the |
| * SecTAG is set, discard |
| */ |
| if (cbit || |
| macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) { |
| u64_stats_update_begin(&secy_stats->syncp); |
| secy_stats->stats.InPktsNoSCI++; |
| u64_stats_update_end(&secy_stats->syncp); |
| DEV_STATS_INC(macsec->secy.netdev, rx_errors); |
| continue; |
| } |
| |
| /* not strict, the frame (with the SecTAG and ICV |
| * removed) is delivered to the Controlled Port. |
| */ |
| nskb = skb_clone(skb, GFP_ATOMIC); |
| if (!nskb) |
| break; |
| |
| macsec_reset_skb(nskb, macsec->secy.netdev); |
| |
| ret = __netif_rx(nskb); |
| if (ret == NET_RX_SUCCESS) { |
| u64_stats_update_begin(&secy_stats->syncp); |
| secy_stats->stats.InPktsUnknownSCI++; |
| u64_stats_update_end(&secy_stats->syncp); |
| } else { |
| DEV_STATS_INC(macsec->secy.netdev, rx_dropped); |
| } |
| } |
| |
| rcu_read_unlock(); |
| *pskb = skb; |
| return RX_HANDLER_PASS; |
| } |
| |
| static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len) |
| { |
| struct crypto_aead *tfm; |
| int ret; |
| |
| tfm = crypto_alloc_aead("gcm(aes)", 0, 0); |
| |
| if (IS_ERR(tfm)) |
| return tfm; |
| |
| ret = crypto_aead_setkey(tfm, key, key_len); |
| if (ret < 0) |
| goto fail; |
| |
| ret = crypto_aead_setauthsize(tfm, icv_len); |
| if (ret < 0) |
| goto fail; |
| |
| return tfm; |
| fail: |
| crypto_free_aead(tfm); |
| return ERR_PTR(ret); |
| } |
| |
| static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len, |
| int icv_len) |
| { |
| rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats); |
| if (!rx_sa->stats) |
| return -ENOMEM; |
| |
| rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); |
| if (IS_ERR(rx_sa->key.tfm)) { |
| free_percpu(rx_sa->stats); |
| return PTR_ERR(rx_sa->key.tfm); |
| } |
| |
| rx_sa->ssci = MACSEC_UNDEF_SSCI; |
| rx_sa->active = false; |
| rx_sa->next_pn = 1; |
| refcount_set(&rx_sa->refcnt, 1); |
| spin_lock_init(&rx_sa->lock); |
| |
| return 0; |
| } |
| |
| static void clear_rx_sa(struct macsec_rx_sa *rx_sa) |
| { |
| rx_sa->active = false; |
| |
| macsec_rxsa_put(rx_sa); |
| } |
| |
| static void free_rx_sc(struct macsec_rx_sc *rx_sc) |
| { |
| int i; |
| |
| for (i = 0; i < MACSEC_NUM_AN; i++) { |
| struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]); |
| |
| RCU_INIT_POINTER(rx_sc->sa[i], NULL); |
| if (sa) |
| clear_rx_sa(sa); |
| } |
| |
| macsec_rxsc_put(rx_sc); |
| } |
| |
| static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci) |
| { |
| struct macsec_rx_sc *rx_sc, __rcu **rx_scp; |
| |
| for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp); |
| rx_sc; |
| rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) { |
| if (rx_sc->sci == sci) { |
| if (rx_sc->active) |
| secy->n_rx_sc--; |
| rcu_assign_pointer(*rx_scp, rx_sc->next); |
| return rx_sc; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci, |
| bool active) |
| { |
| struct macsec_rx_sc *rx_sc; |
| struct macsec_dev *macsec; |
| struct net_device *real_dev = macsec_priv(dev)->real_dev; |
| struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); |
| struct macsec_secy *secy; |
| |
| list_for_each_entry(macsec, &rxd->secys, secys) { |
| if (find_rx_sc_rtnl(&macsec->secy, sci)) |
| return ERR_PTR(-EEXIST); |
| } |
| |
| rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL); |
| if (!rx_sc) |
| return ERR_PTR(-ENOMEM); |
| |
| rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats); |
| if (!rx_sc->stats) { |
| kfree(rx_sc); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| rx_sc->sci = sci; |
| rx_sc->active = active; |
| refcount_set(&rx_sc->refcnt, 1); |
| |
| secy = &macsec_priv(dev)->secy; |
| rcu_assign_pointer(rx_sc->next, secy->rx_sc); |
| rcu_assign_pointer(secy->rx_sc, rx_sc); |
| |
| if (rx_sc->active) |
| secy->n_rx_sc++; |
| |
| return rx_sc; |
| } |
| |
| static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len, |
| int icv_len) |
| { |
| tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats); |
| if (!tx_sa->stats) |
| return -ENOMEM; |
| |
| tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len); |
| if (IS_ERR(tx_sa->key.tfm)) { |
| free_percpu(tx_sa->stats); |
| return PTR_ERR(tx_sa->key.tfm); |
| } |
| |
| tx_sa->ssci = MACSEC_UNDEF_SSCI; |
| tx_sa->active = false; |
| refcount_set(&tx_sa->refcnt, 1); |
| spin_lock_init(&tx_sa->lock); |
| |
| return 0; |
| } |
| |
| static void clear_tx_sa(struct macsec_tx_sa *tx_sa) |
| { |
| tx_sa->active = false; |
| |
| macsec_txsa_put(tx_sa); |
| } |
| |
| static struct genl_family macsec_fam; |
| |
| static struct net_device *get_dev_from_nl(struct net *net, |
| struct nlattr **attrs) |
| { |
| int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]); |
| struct net_device *dev; |
| |
| dev = __dev_get_by_index(net, ifindex); |
| if (!dev) |
| return ERR_PTR(-ENODEV); |
| |
| if (!netif_is_macsec(dev)) |
| return ERR_PTR(-ENODEV); |
| |
| return dev; |
| } |
| |
| static enum macsec_offload nla_get_offload(const struct nlattr *nla) |
| { |
| return (__force enum macsec_offload)nla_get_u8(nla); |
| } |
| |
| static sci_t nla_get_sci(const struct nlattr *nla) |
| { |
| return (__force sci_t)nla_get_u64(nla); |
| } |
| |
| static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value, |
| int padattr) |
| { |
| return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr); |
| } |
| |
| static ssci_t nla_get_ssci(const struct nlattr *nla) |
| { |
| return (__force ssci_t)nla_get_u32(nla); |
| } |
| |
| static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value) |
| { |
| return nla_put_u32(skb, attrtype, (__force u64)value); |
| } |
| |
| static struct macsec_tx_sa *get_txsa_from_nl(struct net *net, |
| struct nlattr **attrs, |
| struct nlattr **tb_sa, |
| struct net_device **devp, |
| struct macsec_secy **secyp, |
| struct macsec_tx_sc **scp, |
| u8 *assoc_num) |
| { |
| struct net_device *dev; |
| struct macsec_secy *secy; |
| struct macsec_tx_sc *tx_sc; |
| struct macsec_tx_sa *tx_sa; |
| |
| if (!tb_sa[MACSEC_SA_ATTR_AN]) |
| return ERR_PTR(-EINVAL); |
| |
| *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); |
| |
| dev = get_dev_from_nl(net, attrs); |
| if (IS_ERR(dev)) |
| return ERR_CAST(dev); |
| |
| if (*assoc_num >= MACSEC_NUM_AN) |
| return ERR_PTR(-EINVAL); |
| |
| secy = &macsec_priv(dev)->secy; |
| tx_sc = &secy->tx_sc; |
| |
| tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]); |
| if (!tx_sa) |
| return ERR_PTR(-ENODEV); |
| |
| *devp = dev; |
| *scp = tx_sc; |
| *secyp = secy; |
| return tx_sa; |
| } |
| |
| static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net, |
| struct nlattr **attrs, |
| struct nlattr **tb_rxsc, |
| struct net_device **devp, |
| struct macsec_secy **secyp) |
| { |
| struct net_device *dev; |
| struct macsec_secy *secy; |
| struct macsec_rx_sc *rx_sc; |
| sci_t sci; |
| |
| dev = get_dev_from_nl(net, attrs); |
| if (IS_ERR(dev)) |
| return ERR_CAST(dev); |
| |
| secy = &macsec_priv(dev)->secy; |
| |
| if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) |
| return ERR_PTR(-EINVAL); |
| |
| sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
| rx_sc = find_rx_sc_rtnl(secy, sci); |
| if (!rx_sc) |
| return ERR_PTR(-ENODEV); |
| |
| *secyp = secy; |
| *devp = dev; |
| |
| return rx_sc; |
| } |
| |
| static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net, |
| struct nlattr **attrs, |
| struct nlattr **tb_rxsc, |
| struct nlattr **tb_sa, |
| struct net_device **devp, |
| struct macsec_secy **secyp, |
| struct macsec_rx_sc **scp, |
| u8 *assoc_num) |
| { |
| struct macsec_rx_sc *rx_sc; |
| struct macsec_rx_sa *rx_sa; |
| |
| if (!tb_sa[MACSEC_SA_ATTR_AN]) |
| return ERR_PTR(-EINVAL); |
| |
| *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); |
| if (*assoc_num >= MACSEC_NUM_AN) |
| return ERR_PTR(-EINVAL); |
| |
| rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp); |
| if (IS_ERR(rx_sc)) |
| return ERR_CAST(rx_sc); |
| |
| rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]); |
| if (!rx_sa) |
| return ERR_PTR(-ENODEV); |
| |
| *scp = rx_sc; |
| return rx_sa; |
| } |
| |
| static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = { |
| [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, |
| [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED }, |
| [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED }, |
| [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED }, |
| }; |
| |
| static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = { |
| [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, |
| [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, |
| }; |
| |
| static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = { |
| [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, |
| [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, |
| [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4), |
| [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY, |
| .len = MACSEC_KEYID_LEN, }, |
| [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY, |
| .len = MACSEC_MAX_KEY_LEN, }, |
| [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 }, |
| [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY, |
| .len = MACSEC_SALT_LEN, }, |
| }; |
| |
| static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = { |
| [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 }, |
| }; |
| |
| /* Offloads an operation to a device driver */ |
| static int macsec_offload(int (* const func)(struct macsec_context *), |
| struct macsec_context *ctx) |
| { |
| int ret; |
| |
| if (unlikely(!func)) |
| return 0; |
| |
| if (ctx->offload == MACSEC_OFFLOAD_PHY) |
| mutex_lock(&ctx->phydev->lock); |
| |
| ret = (*func)(ctx); |
| |
| if (ctx->offload == MACSEC_OFFLOAD_PHY) |
| mutex_unlock(&ctx->phydev->lock); |
| |
| return ret; |
| } |
| |
| static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa) |
| { |
| if (!attrs[MACSEC_ATTR_SA_CONFIG]) |
| return -EINVAL; |
| |
| if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc) |
| { |
| if (!attrs[MACSEC_ATTR_RXSC_CONFIG]) |
| return -EINVAL; |
| |
| if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static bool validate_add_rxsa(struct nlattr **attrs) |
| { |
| if (!attrs[MACSEC_SA_ATTR_AN] || |
| !attrs[MACSEC_SA_ATTR_KEY] || |
| !attrs[MACSEC_SA_ATTR_KEYID]) |
| return false; |
| |
| if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) |
| return false; |
| |
| if (attrs[MACSEC_SA_ATTR_PN] && |
| nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
| return false; |
| |
| if (attrs[MACSEC_SA_ATTR_ACTIVE]) { |
| if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) |
| return false; |
| } |
| |
| if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
| return false; |
| |
| return true; |
| } |
| |
| static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct net_device *dev; |
| struct nlattr **attrs = info->attrs; |
| struct macsec_secy *secy; |
| struct macsec_rx_sc *rx_sc; |
| struct macsec_rx_sa *rx_sa; |
| unsigned char assoc_num; |
| int pn_len; |
| struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
| struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
| int err; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_sa_config(attrs, tb_sa)) |
| return -EINVAL; |
| |
| if (parse_rxsc_config(attrs, tb_rxsc)) |
| return -EINVAL; |
| |
| if (!validate_add_rxsa(tb_sa)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); |
| if (IS_ERR(rx_sc)) { |
| rtnl_unlock(); |
| return PTR_ERR(rx_sc); |
| } |
| |
| assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); |
| |
| if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { |
| pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n", |
| nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| |
| pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
| if (tb_sa[MACSEC_SA_ATTR_PN] && |
| nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { |
| pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n", |
| nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| |
| if (secy->xpn) { |
| if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| |
| if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { |
| pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n", |
| nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), |
| MACSEC_SALT_LEN); |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| } |
| |
| rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]); |
| if (rx_sa) { |
| rtnl_unlock(); |
| return -EBUSY; |
| } |
| |
| rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL); |
| if (!rx_sa) { |
| rtnl_unlock(); |
| return -ENOMEM; |
| } |
| |
| err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
| secy->key_len, secy->icv_len); |
| if (err < 0) { |
| kfree(rx_sa); |
| rtnl_unlock(); |
| return err; |
| } |
| |
| if (tb_sa[MACSEC_SA_ATTR_PN]) { |
| spin_lock_bh(&rx_sa->lock); |
| rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
| spin_unlock_bh(&rx_sa->lock); |
| } |
| |
| if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
| rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); |
| |
| rx_sa->sc = rx_sc; |
| |
| if (secy->xpn) { |
| rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); |
| nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], |
| MACSEC_SALT_LEN); |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| err = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.sa.assoc_num = assoc_num; |
| ctx.sa.rx_sa = rx_sa; |
| ctx.secy = secy; |
| memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
| secy->key_len); |
| |
| err = macsec_offload(ops->mdo_add_rxsa, &ctx); |
| memzero_explicit(ctx.sa.key, secy->key_len); |
| if (err) |
| goto cleanup; |
| } |
| |
| nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
| rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa); |
| |
| rtnl_unlock(); |
| |
| return 0; |
| |
| cleanup: |
| macsec_rxsa_put(rx_sa); |
| rtnl_unlock(); |
| return err; |
| } |
| |
| static bool validate_add_rxsc(struct nlattr **attrs) |
| { |
| if (!attrs[MACSEC_RXSC_ATTR_SCI]) |
| return false; |
| |
| if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) { |
| if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct net_device *dev; |
| sci_t sci = MACSEC_UNDEF_SCI; |
| struct nlattr **attrs = info->attrs; |
| struct macsec_rx_sc *rx_sc; |
| struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
| struct macsec_secy *secy; |
| bool active = true; |
| int ret; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_rxsc_config(attrs, tb_rxsc)) |
| return -EINVAL; |
| |
| if (!validate_add_rxsc(tb_rxsc)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| dev = get_dev_from_nl(genl_info_net(info), attrs); |
| if (IS_ERR(dev)) { |
| rtnl_unlock(); |
| return PTR_ERR(dev); |
| } |
| |
| secy = &macsec_priv(dev)->secy; |
| sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
| |
| if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) |
| active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); |
| |
| rx_sc = create_rx_sc(dev, sci, active); |
| if (IS_ERR(rx_sc)) { |
| rtnl_unlock(); |
| return PTR_ERR(rx_sc); |
| } |
| |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| ret = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.rx_sc = rx_sc; |
| ctx.secy = secy; |
| |
| ret = macsec_offload(ops->mdo_add_rxsc, &ctx); |
| if (ret) |
| goto cleanup; |
| } |
| |
| rtnl_unlock(); |
| |
| return 0; |
| |
| cleanup: |
| del_rx_sc(secy, sci); |
| free_rx_sc(rx_sc); |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| static bool validate_add_txsa(struct nlattr **attrs) |
| { |
| if (!attrs[MACSEC_SA_ATTR_AN] || |
| !attrs[MACSEC_SA_ATTR_PN] || |
| !attrs[MACSEC_SA_ATTR_KEY] || |
| !attrs[MACSEC_SA_ATTR_KEYID]) |
| return false; |
| |
| if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) |
| return false; |
| |
| if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
| return false; |
| |
| if (attrs[MACSEC_SA_ATTR_ACTIVE]) { |
| if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) |
| return false; |
| } |
| |
| if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN) |
| return false; |
| |
| return true; |
| } |
| |
| static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct net_device *dev; |
| struct nlattr **attrs = info->attrs; |
| struct macsec_secy *secy; |
| struct macsec_tx_sc *tx_sc; |
| struct macsec_tx_sa *tx_sa; |
| unsigned char assoc_num; |
| int pn_len; |
| struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
| bool was_operational; |
| int err; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_sa_config(attrs, tb_sa)) |
| return -EINVAL; |
| |
| if (!validate_add_txsa(tb_sa)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| dev = get_dev_from_nl(genl_info_net(info), attrs); |
| if (IS_ERR(dev)) { |
| rtnl_unlock(); |
| return PTR_ERR(dev); |
| } |
| |
| secy = &macsec_priv(dev)->secy; |
| tx_sc = &secy->tx_sc; |
| |
| assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]); |
| |
| if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) { |
| pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n", |
| nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len); |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| |
| pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
| if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { |
| pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n", |
| nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| |
| if (secy->xpn) { |
| if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) { |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| |
| if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { |
| pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n", |
| nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), |
| MACSEC_SALT_LEN); |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| } |
| |
| tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]); |
| if (tx_sa) { |
| rtnl_unlock(); |
| return -EBUSY; |
| } |
| |
| tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL); |
| if (!tx_sa) { |
| rtnl_unlock(); |
| return -ENOMEM; |
| } |
| |
| err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
| secy->key_len, secy->icv_len); |
| if (err < 0) { |
| kfree(tx_sa); |
| rtnl_unlock(); |
| return err; |
| } |
| |
| spin_lock_bh(&tx_sa->lock); |
| tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
| spin_unlock_bh(&tx_sa->lock); |
| |
| if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
| tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); |
| |
| was_operational = secy->operational; |
| if (assoc_num == tx_sc->encoding_sa && tx_sa->active) |
| secy->operational = true; |
| |
| if (secy->xpn) { |
| tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]); |
| nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT], |
| MACSEC_SALT_LEN); |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| err = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.sa.assoc_num = assoc_num; |
| ctx.sa.tx_sa = tx_sa; |
| ctx.secy = secy; |
| memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), |
| secy->key_len); |
| |
| err = macsec_offload(ops->mdo_add_txsa, &ctx); |
| memzero_explicit(ctx.sa.key, secy->key_len); |
| if (err) |
| goto cleanup; |
| } |
| |
| nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN); |
| rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa); |
| |
| rtnl_unlock(); |
| |
| return 0; |
| |
| cleanup: |
| secy->operational = was_operational; |
| macsec_txsa_put(tx_sa); |
| rtnl_unlock(); |
| return err; |
| } |
| |
| static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct nlattr **attrs = info->attrs; |
| struct net_device *dev; |
| struct macsec_secy *secy; |
| struct macsec_rx_sc *rx_sc; |
| struct macsec_rx_sa *rx_sa; |
| u8 assoc_num; |
| struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
| struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
| int ret; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_sa_config(attrs, tb_sa)) |
| return -EINVAL; |
| |
| if (parse_rxsc_config(attrs, tb_rxsc)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, |
| &dev, &secy, &rx_sc, &assoc_num); |
| if (IS_ERR(rx_sa)) { |
| rtnl_unlock(); |
| return PTR_ERR(rx_sa); |
| } |
| |
| if (rx_sa->active) { |
| rtnl_unlock(); |
| return -EBUSY; |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| ret = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.sa.assoc_num = assoc_num; |
| ctx.sa.rx_sa = rx_sa; |
| ctx.secy = secy; |
| |
| ret = macsec_offload(ops->mdo_del_rxsa, &ctx); |
| if (ret) |
| goto cleanup; |
| } |
| |
| RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL); |
| clear_rx_sa(rx_sa); |
| |
| rtnl_unlock(); |
| |
| return 0; |
| |
| cleanup: |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct nlattr **attrs = info->attrs; |
| struct net_device *dev; |
| struct macsec_secy *secy; |
| struct macsec_rx_sc *rx_sc; |
| sci_t sci; |
| struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
| int ret; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_rxsc_config(attrs, tb_rxsc)) |
| return -EINVAL; |
| |
| if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI]) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| dev = get_dev_from_nl(genl_info_net(info), info->attrs); |
| if (IS_ERR(dev)) { |
| rtnl_unlock(); |
| return PTR_ERR(dev); |
| } |
| |
| secy = &macsec_priv(dev)->secy; |
| sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]); |
| |
| rx_sc = del_rx_sc(secy, sci); |
| if (!rx_sc) { |
| rtnl_unlock(); |
| return -ENODEV; |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| ret = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.rx_sc = rx_sc; |
| ctx.secy = secy; |
| ret = macsec_offload(ops->mdo_del_rxsc, &ctx); |
| if (ret) |
| goto cleanup; |
| } |
| |
| free_rx_sc(rx_sc); |
| rtnl_unlock(); |
| |
| return 0; |
| |
| cleanup: |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct nlattr **attrs = info->attrs; |
| struct net_device *dev; |
| struct macsec_secy *secy; |
| struct macsec_tx_sc *tx_sc; |
| struct macsec_tx_sa *tx_sa; |
| u8 assoc_num; |
| struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
| int ret; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_sa_config(attrs, tb_sa)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, |
| &dev, &secy, &tx_sc, &assoc_num); |
| if (IS_ERR(tx_sa)) { |
| rtnl_unlock(); |
| return PTR_ERR(tx_sa); |
| } |
| |
| if (tx_sa->active) { |
| rtnl_unlock(); |
| return -EBUSY; |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| ret = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.sa.assoc_num = assoc_num; |
| ctx.sa.tx_sa = tx_sa; |
| ctx.secy = secy; |
| |
| ret = macsec_offload(ops->mdo_del_txsa, &ctx); |
| if (ret) |
| goto cleanup; |
| } |
| |
| RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL); |
| clear_tx_sa(tx_sa); |
| |
| rtnl_unlock(); |
| |
| return 0; |
| |
| cleanup: |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| static bool validate_upd_sa(struct nlattr **attrs) |
| { |
| if (!attrs[MACSEC_SA_ATTR_AN] || |
| attrs[MACSEC_SA_ATTR_KEY] || |
| attrs[MACSEC_SA_ATTR_KEYID] || |
| attrs[MACSEC_SA_ATTR_SSCI] || |
| attrs[MACSEC_SA_ATTR_SALT]) |
| return false; |
| |
| if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) |
| return false; |
| |
| if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) |
| return false; |
| |
| if (attrs[MACSEC_SA_ATTR_ACTIVE]) { |
| if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct nlattr **attrs = info->attrs; |
| struct net_device *dev; |
| struct macsec_secy *secy; |
| struct macsec_tx_sc *tx_sc; |
| struct macsec_tx_sa *tx_sa; |
| u8 assoc_num; |
| struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
| bool was_operational, was_active; |
| pn_t prev_pn; |
| int ret = 0; |
| |
| prev_pn.full64 = 0; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_sa_config(attrs, tb_sa)) |
| return -EINVAL; |
| |
| if (!validate_upd_sa(tb_sa)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa, |
| &dev, &secy, &tx_sc, &assoc_num); |
| if (IS_ERR(tx_sa)) { |
| rtnl_unlock(); |
| return PTR_ERR(tx_sa); |
| } |
| |
| if (tb_sa[MACSEC_SA_ATTR_PN]) { |
| int pn_len; |
| |
| pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
| if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { |
| pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n", |
| nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| |
| spin_lock_bh(&tx_sa->lock); |
| prev_pn = tx_sa->next_pn_halves; |
| tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
| spin_unlock_bh(&tx_sa->lock); |
| } |
| |
| was_active = tx_sa->active; |
| if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
| tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); |
| |
| was_operational = secy->operational; |
| if (assoc_num == tx_sc->encoding_sa) |
| secy->operational = tx_sa->active; |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| ret = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.sa.assoc_num = assoc_num; |
| ctx.sa.tx_sa = tx_sa; |
| ctx.secy = secy; |
| |
| ret = macsec_offload(ops->mdo_upd_txsa, &ctx); |
| if (ret) |
| goto cleanup; |
| } |
| |
| rtnl_unlock(); |
| |
| return 0; |
| |
| cleanup: |
| if (tb_sa[MACSEC_SA_ATTR_PN]) { |
| spin_lock_bh(&tx_sa->lock); |
| tx_sa->next_pn_halves = prev_pn; |
| spin_unlock_bh(&tx_sa->lock); |
| } |
| tx_sa->active = was_active; |
| secy->operational = was_operational; |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct nlattr **attrs = info->attrs; |
| struct net_device *dev; |
| struct macsec_secy *secy; |
| struct macsec_rx_sc *rx_sc; |
| struct macsec_rx_sa *rx_sa; |
| u8 assoc_num; |
| struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
| struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; |
| bool was_active; |
| pn_t prev_pn; |
| int ret = 0; |
| |
| prev_pn.full64 = 0; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_rxsc_config(attrs, tb_rxsc)) |
| return -EINVAL; |
| |
| if (parse_sa_config(attrs, tb_sa)) |
| return -EINVAL; |
| |
| if (!validate_upd_sa(tb_sa)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa, |
| &dev, &secy, &rx_sc, &assoc_num); |
| if (IS_ERR(rx_sa)) { |
| rtnl_unlock(); |
| return PTR_ERR(rx_sa); |
| } |
| |
| if (tb_sa[MACSEC_SA_ATTR_PN]) { |
| int pn_len; |
| |
| pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; |
| if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { |
| pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n", |
| nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); |
| rtnl_unlock(); |
| return -EINVAL; |
| } |
| |
| spin_lock_bh(&rx_sa->lock); |
| prev_pn = rx_sa->next_pn_halves; |
| rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]); |
| spin_unlock_bh(&rx_sa->lock); |
| } |
| |
| was_active = rx_sa->active; |
| if (tb_sa[MACSEC_SA_ATTR_ACTIVE]) |
| rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]); |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| ret = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.sa.assoc_num = assoc_num; |
| ctx.sa.rx_sa = rx_sa; |
| ctx.secy = secy; |
| |
| ret = macsec_offload(ops->mdo_upd_rxsa, &ctx); |
| if (ret) |
| goto cleanup; |
| } |
| |
| rtnl_unlock(); |
| return 0; |
| |
| cleanup: |
| if (tb_sa[MACSEC_SA_ATTR_PN]) { |
| spin_lock_bh(&rx_sa->lock); |
| rx_sa->next_pn_halves = prev_pn; |
| spin_unlock_bh(&rx_sa->lock); |
| } |
| rx_sa->active = was_active; |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct nlattr **attrs = info->attrs; |
| struct net_device *dev; |
| struct macsec_secy *secy; |
| struct macsec_rx_sc *rx_sc; |
| struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1]; |
| unsigned int prev_n_rx_sc; |
| bool was_active; |
| int ret; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (parse_rxsc_config(attrs, tb_rxsc)) |
| return -EINVAL; |
| |
| if (!validate_add_rxsc(tb_rxsc)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy); |
| if (IS_ERR(rx_sc)) { |
| rtnl_unlock(); |
| return PTR_ERR(rx_sc); |
| } |
| |
| was_active = rx_sc->active; |
| prev_n_rx_sc = secy->n_rx_sc; |
| if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) { |
| bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]); |
| |
| if (rx_sc->active != new) |
| secy->n_rx_sc += new ? 1 : -1; |
| |
| rx_sc->active = new; |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| ret = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.rx_sc = rx_sc; |
| ctx.secy = secy; |
| |
| ret = macsec_offload(ops->mdo_upd_rxsc, &ctx); |
| if (ret) |
| goto cleanup; |
| } |
| |
| rtnl_unlock(); |
| |
| return 0; |
| |
| cleanup: |
| secy->n_rx_sc = prev_n_rx_sc; |
| rx_sc->active = was_active; |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| static bool macsec_is_configured(struct macsec_dev *macsec) |
| { |
| struct macsec_secy *secy = &macsec->secy; |
| struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
| int i; |
| |
| if (secy->rx_sc) |
| return true; |
| |
| for (i = 0; i < MACSEC_NUM_AN; i++) |
| if (tx_sc->sa[i]) |
| return true; |
| |
| return false; |
| } |
| |
| static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload) |
| { |
| enum macsec_offload prev_offload; |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| struct macsec_dev *macsec; |
| int ret = 0; |
| |
| macsec = macsec_priv(dev); |
| |
| /* Check if the offloading mode is supported by the underlying layers */ |
| if (offload != MACSEC_OFFLOAD_OFF && |
| !macsec_check_offload(offload, macsec)) |
| return -EOPNOTSUPP; |
| |
| /* Check if the net device is busy. */ |
| if (netif_running(dev)) |
| return -EBUSY; |
| |
| /* Check if the device already has rules configured: we do not support |
| * rules migration. |
| */ |
| if (macsec_is_configured(macsec)) |
| return -EBUSY; |
| |
| prev_offload = macsec->offload; |
| |
| ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload, |
| macsec, &ctx); |
| if (!ops) |
| return -EOPNOTSUPP; |
| |
| macsec->offload = offload; |
| |
| ctx.secy = &macsec->secy; |
| ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(ops->mdo_del_secy, &ctx) |
| : macsec_offload(ops->mdo_add_secy, &ctx); |
| if (ret) |
| macsec->offload = prev_offload; |
| |
| return ret; |
| } |
| |
| static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1]; |
| struct nlattr **attrs = info->attrs; |
| enum macsec_offload offload; |
| struct macsec_dev *macsec; |
| struct net_device *dev; |
| int ret = 0; |
| |
| if (!attrs[MACSEC_ATTR_IFINDEX]) |
| return -EINVAL; |
| |
| if (!attrs[MACSEC_ATTR_OFFLOAD]) |
| return -EINVAL; |
| |
| if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX, |
| attrs[MACSEC_ATTR_OFFLOAD], |
| macsec_genl_offload_policy, NULL)) |
| return -EINVAL; |
| |
| rtnl_lock(); |
| |
| dev = get_dev_from_nl(genl_info_net(info), attrs); |
| if (IS_ERR(dev)) { |
| ret = PTR_ERR(dev); |
| goto out; |
| } |
| macsec = macsec_priv(dev); |
| |
| if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]); |
| |
| if (macsec->offload != offload) |
| ret = macsec_update_offload(dev, offload); |
| out: |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| static void get_tx_sa_stats(struct net_device *dev, int an, |
| struct macsec_tx_sa *tx_sa, |
| struct macsec_tx_sa_stats *sum) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| int cpu; |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(macsec, &ctx); |
| if (ops) { |
| ctx.sa.assoc_num = an; |
| ctx.sa.tx_sa = tx_sa; |
| ctx.stats.tx_sa_stats = sum; |
| ctx.secy = &macsec_priv(dev)->secy; |
| macsec_offload(ops->mdo_get_tx_sa_stats, &ctx); |
| } |
| return; |
| } |
| |
| for_each_possible_cpu(cpu) { |
| const struct macsec_tx_sa_stats *stats = |
| per_cpu_ptr(tx_sa->stats, cpu); |
| |
| sum->OutPktsProtected += stats->OutPktsProtected; |
| sum->OutPktsEncrypted += stats->OutPktsEncrypted; |
| } |
| } |
| |
| static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum) |
| { |
| if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, |
| sum->OutPktsProtected) || |
| nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, |
| sum->OutPktsEncrypted)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static void get_rx_sa_stats(struct net_device *dev, |
| struct macsec_rx_sc *rx_sc, int an, |
| struct macsec_rx_sa *rx_sa, |
| struct macsec_rx_sa_stats *sum) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| int cpu; |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(macsec, &ctx); |
| if (ops) { |
| ctx.sa.assoc_num = an; |
| ctx.sa.rx_sa = rx_sa; |
| ctx.stats.rx_sa_stats = sum; |
| ctx.secy = &macsec_priv(dev)->secy; |
| ctx.rx_sc = rx_sc; |
| macsec_offload(ops->mdo_get_rx_sa_stats, &ctx); |
| } |
| return; |
| } |
| |
| for_each_possible_cpu(cpu) { |
| const struct macsec_rx_sa_stats *stats = |
| per_cpu_ptr(rx_sa->stats, cpu); |
| |
| sum->InPktsOK += stats->InPktsOK; |
| sum->InPktsInvalid += stats->InPktsInvalid; |
| sum->InPktsNotValid += stats->InPktsNotValid; |
| sum->InPktsNotUsingSA += stats->InPktsNotUsingSA; |
| sum->InPktsUnusedSA += stats->InPktsUnusedSA; |
| } |
| } |
| |
| static int copy_rx_sa_stats(struct sk_buff *skb, |
| struct macsec_rx_sa_stats *sum) |
| { |
| if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) || |
| nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, |
| sum->InPktsInvalid) || |
| nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, |
| sum->InPktsNotValid) || |
| nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, |
| sum->InPktsNotUsingSA) || |
| nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, |
| sum->InPktsUnusedSA)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static void get_rx_sc_stats(struct net_device *dev, |
| struct macsec_rx_sc *rx_sc, |
| struct macsec_rx_sc_stats *sum) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| int cpu; |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(macsec, &ctx); |
| if (ops) { |
| ctx.stats.rx_sc_stats = sum; |
| ctx.secy = &macsec_priv(dev)->secy; |
| ctx.rx_sc = rx_sc; |
| macsec_offload(ops->mdo_get_rx_sc_stats, &ctx); |
| } |
| return; |
| } |
| |
| for_each_possible_cpu(cpu) { |
| const struct pcpu_rx_sc_stats *stats; |
| struct macsec_rx_sc_stats tmp; |
| unsigned int start; |
| |
| stats = per_cpu_ptr(rx_sc->stats, cpu); |
| do { |
| start = u64_stats_fetch_begin(&stats->syncp); |
| memcpy(&tmp, &stats->stats, sizeof(tmp)); |
| } while (u64_stats_fetch_retry(&stats->syncp, start)); |
| |
| sum->InOctetsValidated += tmp.InOctetsValidated; |
| sum->InOctetsDecrypted += tmp.InOctetsDecrypted; |
| sum->InPktsUnchecked += tmp.InPktsUnchecked; |
| sum->InPktsDelayed += tmp.InPktsDelayed; |
| sum->InPktsOK += tmp.InPktsOK; |
| sum->InPktsInvalid += tmp.InPktsInvalid; |
| sum->InPktsLate += tmp.InPktsLate; |
| sum->InPktsNotValid += tmp.InPktsNotValid; |
| sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA; |
| sum->InPktsUnusedSA += tmp.InPktsUnusedSA; |
| } |
| } |
| |
| static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum) |
| { |
| if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, |
| sum->InOctetsValidated, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, |
| sum->InOctetsDecrypted, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, |
| sum->InPktsUnchecked, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, |
| sum->InPktsDelayed, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, |
| sum->InPktsOK, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, |
| sum->InPktsInvalid, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, |
| sum->InPktsLate, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, |
| sum->InPktsNotValid, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, |
| sum->InPktsNotUsingSA, |
| MACSEC_RXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, |
| sum->InPktsUnusedSA, |
| MACSEC_RXSC_STATS_ATTR_PAD)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static void get_tx_sc_stats(struct net_device *dev, |
| struct macsec_tx_sc_stats *sum) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| int cpu; |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(macsec, &ctx); |
| if (ops) { |
| ctx.stats.tx_sc_stats = sum; |
| ctx.secy = &macsec_priv(dev)->secy; |
| macsec_offload(ops->mdo_get_tx_sc_stats, &ctx); |
| } |
| return; |
| } |
| |
| for_each_possible_cpu(cpu) { |
| const struct pcpu_tx_sc_stats *stats; |
| struct macsec_tx_sc_stats tmp; |
| unsigned int start; |
| |
| stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu); |
| do { |
| start = u64_stats_fetch_begin(&stats->syncp); |
| memcpy(&tmp, &stats->stats, sizeof(tmp)); |
| } while (u64_stats_fetch_retry(&stats->syncp, start)); |
| |
| sum->OutPktsProtected += tmp.OutPktsProtected; |
| sum->OutPktsEncrypted += tmp.OutPktsEncrypted; |
| sum->OutOctetsProtected += tmp.OutOctetsProtected; |
| sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted; |
| } |
| } |
| |
| static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum) |
| { |
| if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, |
| sum->OutPktsProtected, |
| MACSEC_TXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, |
| sum->OutPktsEncrypted, |
| MACSEC_TXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, |
| sum->OutOctetsProtected, |
| MACSEC_TXSC_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, |
| sum->OutOctetsEncrypted, |
| MACSEC_TXSC_STATS_ATTR_PAD)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| int cpu; |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(macsec, &ctx); |
| if (ops) { |
| ctx.stats.dev_stats = sum; |
| ctx.secy = &macsec_priv(dev)->secy; |
| macsec_offload(ops->mdo_get_dev_stats, &ctx); |
| } |
| return; |
| } |
| |
| for_each_possible_cpu(cpu) { |
| const struct pcpu_secy_stats *stats; |
| struct macsec_dev_stats tmp; |
| unsigned int start; |
| |
| stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu); |
| do { |
| start = u64_stats_fetch_begin(&stats->syncp); |
| memcpy(&tmp, &stats->stats, sizeof(tmp)); |
| } while (u64_stats_fetch_retry(&stats->syncp, start)); |
| |
| sum->OutPktsUntagged += tmp.OutPktsUntagged; |
| sum->InPktsUntagged += tmp.InPktsUntagged; |
| sum->OutPktsTooLong += tmp.OutPktsTooLong; |
| sum->InPktsNoTag += tmp.InPktsNoTag; |
| sum->InPktsBadTag += tmp.InPktsBadTag; |
| sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI; |
| sum->InPktsNoSCI += tmp.InPktsNoSCI; |
| sum->InPktsOverrun += tmp.InPktsOverrun; |
| } |
| } |
| |
| static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum) |
| { |
| if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, |
| sum->OutPktsUntagged, |
| MACSEC_SECY_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, |
| sum->InPktsUntagged, |
| MACSEC_SECY_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, |
| sum->OutPktsTooLong, |
| MACSEC_SECY_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, |
| sum->InPktsNoTag, |
| MACSEC_SECY_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, |
| sum->InPktsBadTag, |
| MACSEC_SECY_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, |
| sum->InPktsUnknownSCI, |
| MACSEC_SECY_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, |
| sum->InPktsNoSCI, |
| MACSEC_SECY_STATS_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, |
| sum->InPktsOverrun, |
| MACSEC_SECY_STATS_ATTR_PAD)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb) |
| { |
| struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
| struct nlattr *secy_nest = nla_nest_start_noflag(skb, |
| MACSEC_ATTR_SECY); |
| u64 csid; |
| |
| if (!secy_nest) |
| return 1; |
| |
| switch (secy->key_len) { |
| case MACSEC_GCM_AES_128_SAK_LEN: |
| csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
| break; |
| case MACSEC_GCM_AES_256_SAK_LEN: |
| csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
| break; |
| default: |
| goto cancel; |
| } |
| |
| if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci, |
| MACSEC_SECY_ATTR_PAD) || |
| nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, |
| csid, MACSEC_SECY_ATTR_PAD) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) || |
| nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa)) |
| goto cancel; |
| |
| if (secy->replay_protect) { |
| if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window)) |
| goto cancel; |
| } |
| |
| nla_nest_end(skb, secy_nest); |
| return 0; |
| |
| cancel: |
| nla_nest_cancel(skb, secy_nest); |
| return 1; |
| } |
| |
| static noinline_for_stack int |
| dump_secy(struct macsec_secy *secy, struct net_device *dev, |
| struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| struct macsec_tx_sc_stats tx_sc_stats = {0, }; |
| struct macsec_tx_sa_stats tx_sa_stats = {0, }; |
| struct macsec_rx_sc_stats rx_sc_stats = {0, }; |
| struct macsec_rx_sa_stats rx_sa_stats = {0, }; |
| struct macsec_dev *macsec = netdev_priv(dev); |
| struct macsec_dev_stats dev_stats = {0, }; |
| struct macsec_tx_sc *tx_sc = &secy->tx_sc; |
| struct nlattr *txsa_list, *rxsc_list; |
| struct macsec_rx_sc *rx_sc; |
| struct nlattr *attr; |
| void *hdr; |
| int i, j; |
| |
| hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC); |
| if (!hdr) |
| return -EMSGSIZE; |
| |
| genl_dump_check_consistent(cb, hdr); |
| |
| if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex)) |
| goto nla_put_failure; |
| |
| attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD); |
| if (!attr) |
| goto nla_put_failure; |
| if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload)) |
| goto nla_put_failure; |
| nla_nest_end(skb, attr); |
| |
| if (nla_put_secy(secy, skb)) |
| goto nla_put_failure; |
| |
| attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS); |
| if (!attr) |
| goto nla_put_failure; |
| |
| get_tx_sc_stats(dev, &tx_sc_stats); |
| if (copy_tx_sc_stats(skb, &tx_sc_stats)) { |
| nla_nest_cancel(skb, attr); |
| goto nla_put_failure; |
| } |
| nla_nest_end(skb, attr); |
| |
| attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS); |
| if (!attr) |
| goto nla_put_failure; |
| get_secy_stats(dev, &dev_stats); |
| if (copy_secy_stats(skb, &dev_stats)) { |
| nla_nest_cancel(skb, attr); |
| goto nla_put_failure; |
| } |
| nla_nest_end(skb, attr); |
| |
| txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST); |
| if (!txsa_list) |
| goto nla_put_failure; |
| for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) { |
| struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]); |
| struct nlattr *txsa_nest; |
| u64 pn; |
| int pn_len; |
| |
| if (!tx_sa) |
| continue; |
| |
| txsa_nest = nla_nest_start_noflag(skb, j++); |
| if (!txsa_nest) { |
| nla_nest_cancel(skb, txsa_list); |
| goto nla_put_failure; |
| } |
| |
| attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS); |
| if (!attr) { |
| nla_nest_cancel(skb, txsa_nest); |
| nla_nest_cancel(skb, txsa_list); |
| goto nla_put_failure; |
| } |
| memset(&tx_sa_stats, 0, sizeof(tx_sa_stats)); |
| get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats); |
| if (copy_tx_sa_stats(skb, &tx_sa_stats)) { |
| nla_nest_cancel(skb, attr); |
| nla_nest_cancel(skb, txsa_nest); |
| nla_nest_cancel(skb, txsa_list); |
| goto nla_put_failure; |
| } |
| nla_nest_end(skb, attr); |
| |
| if (secy->xpn) { |
| pn = tx_sa->next_pn; |
| pn_len = MACSEC_XPN_PN_LEN; |
| } else { |
| pn = tx_sa->next_pn_halves.lower; |
| pn_len = MACSEC_DEFAULT_PN_LEN; |
| } |
| |
| if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
| nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
| nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) || |
| (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) || |
| nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) { |
| nla_nest_cancel(skb, txsa_nest); |
| nla_nest_cancel(skb, txsa_list); |
| goto nla_put_failure; |
| } |
| |
| nla_nest_end(skb, txsa_nest); |
| } |
| nla_nest_end(skb, txsa_list); |
| |
| rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST); |
| if (!rxsc_list) |
| goto nla_put_failure; |
| |
| j = 1; |
| for_each_rxsc_rtnl(secy, rx_sc) { |
| int k; |
| struct nlattr *rxsa_list; |
| struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++); |
| |
| if (!rxsc_nest) { |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| |
| if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) || |
| nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci, |
| MACSEC_RXSC_ATTR_PAD)) { |
| nla_nest_cancel(skb, rxsc_nest); |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| |
| attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS); |
| if (!attr) { |
| nla_nest_cancel(skb, rxsc_nest); |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| memset(&rx_sc_stats, 0, sizeof(rx_sc_stats)); |
| get_rx_sc_stats(dev, rx_sc, &rx_sc_stats); |
| if (copy_rx_sc_stats(skb, &rx_sc_stats)) { |
| nla_nest_cancel(skb, attr); |
| nla_nest_cancel(skb, rxsc_nest); |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| nla_nest_end(skb, attr); |
| |
| rxsa_list = nla_nest_start_noflag(skb, |
| MACSEC_RXSC_ATTR_SA_LIST); |
| if (!rxsa_list) { |
| nla_nest_cancel(skb, rxsc_nest); |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| |
| for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) { |
| struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]); |
| struct nlattr *rxsa_nest; |
| u64 pn; |
| int pn_len; |
| |
| if (!rx_sa) |
| continue; |
| |
| rxsa_nest = nla_nest_start_noflag(skb, k++); |
| if (!rxsa_nest) { |
| nla_nest_cancel(skb, rxsa_list); |
| nla_nest_cancel(skb, rxsc_nest); |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| |
| attr = nla_nest_start_noflag(skb, |
| MACSEC_SA_ATTR_STATS); |
| if (!attr) { |
| nla_nest_cancel(skb, rxsa_list); |
| nla_nest_cancel(skb, rxsc_nest); |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| memset(&rx_sa_stats, 0, sizeof(rx_sa_stats)); |
| get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats); |
| if (copy_rx_sa_stats(skb, &rx_sa_stats)) { |
| nla_nest_cancel(skb, attr); |
| nla_nest_cancel(skb, rxsa_list); |
| nla_nest_cancel(skb, rxsc_nest); |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| nla_nest_end(skb, attr); |
| |
| if (secy->xpn) { |
| pn = rx_sa->next_pn; |
| pn_len = MACSEC_XPN_PN_LEN; |
| } else { |
| pn = rx_sa->next_pn_halves.lower; |
| pn_len = MACSEC_DEFAULT_PN_LEN; |
| } |
| |
| if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) || |
| nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) || |
| nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) || |
| (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) || |
| nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) { |
| nla_nest_cancel(skb, rxsa_nest); |
| nla_nest_cancel(skb, rxsc_nest); |
| nla_nest_cancel(skb, rxsc_list); |
| goto nla_put_failure; |
| } |
| nla_nest_end(skb, rxsa_nest); |
| } |
| |
| nla_nest_end(skb, rxsa_list); |
| nla_nest_end(skb, rxsc_nest); |
| } |
| |
| nla_nest_end(skb, rxsc_list); |
| |
| genlmsg_end(skb, hdr); |
| |
| return 0; |
| |
| nla_put_failure: |
| genlmsg_cancel(skb, hdr); |
| return -EMSGSIZE; |
| } |
| |
| static int macsec_generation = 1; /* protected by RTNL */ |
| |
| static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| struct net *net = sock_net(skb->sk); |
| struct net_device *dev; |
| int dev_idx, d; |
| |
| dev_idx = cb->args[0]; |
| |
| d = 0; |
| rtnl_lock(); |
| |
| cb->seq = macsec_generation; |
| |
| for_each_netdev(net, dev) { |
| struct macsec_secy *secy; |
| |
| if (d < dev_idx) |
| goto next; |
| |
| if (!netif_is_macsec(dev)) |
| goto next; |
| |
| secy = &macsec_priv(dev)->secy; |
| if (dump_secy(secy, dev, skb, cb) < 0) |
| goto done; |
| next: |
| d++; |
| } |
| |
| done: |
| rtnl_unlock(); |
| cb->args[0] = d; |
| return skb->len; |
| } |
| |
| static const struct genl_small_ops macsec_genl_ops[] = { |
| { |
| .cmd = MACSEC_CMD_GET_TXSC, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .dumpit = macsec_dump_txsc, |
| }, |
| { |
| .cmd = MACSEC_CMD_ADD_RXSC, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_add_rxsc, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_DEL_RXSC, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_del_rxsc, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_UPD_RXSC, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_upd_rxsc, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_ADD_TXSA, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_add_txsa, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_DEL_TXSA, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_del_txsa, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_UPD_TXSA, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_upd_txsa, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_ADD_RXSA, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_add_rxsa, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_DEL_RXSA, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_del_rxsa, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_UPD_RXSA, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_upd_rxsa, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = MACSEC_CMD_UPD_OFFLOAD, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = macsec_upd_offload, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| }; |
| |
| static struct genl_family macsec_fam __ro_after_init = { |
| .name = MACSEC_GENL_NAME, |
| .hdrsize = 0, |
| .version = MACSEC_GENL_VERSION, |
| .maxattr = MACSEC_ATTR_MAX, |
| .policy = macsec_genl_policy, |
| .netnsok = true, |
| .module = THIS_MODULE, |
| .small_ops = macsec_genl_ops, |
| .n_small_ops = ARRAY_SIZE(macsec_genl_ops), |
| .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1, |
| }; |
| |
| static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| struct macsec_dev *macsec = netdev_priv(dev); |
| struct macsec_secy *secy = &macsec->secy; |
| struct pcpu_secy_stats *secy_stats; |
| int ret, len; |
| |
| if (macsec_is_offloaded(netdev_priv(dev))) { |
| struct metadata_dst *md_dst = secy->tx_sc.md_dst; |
| |
| skb_dst_drop(skb); |
| dst_hold(&md_dst->dst); |
| skb_dst_set(skb, &md_dst->dst); |
| skb->dev = macsec->real_dev; |
| return dev_queue_xmit(skb); |
| } |
| |
| /* 10.5 */ |
| if (!secy->protect_frames) { |
| secy_stats = this_cpu_ptr(macsec->stats); |
| u64_stats_update_begin(&secy_stats->syncp); |
| secy_stats->stats.OutPktsUntagged++; |
| u64_stats_update_end(&secy_stats->syncp); |
| skb->dev = macsec->real_dev; |
| len = skb->len; |
| ret = dev_queue_xmit(skb); |
| count_tx(dev, ret, len); |
| return ret; |
| } |
| |
| if (!secy->operational) { |
| kfree_skb(skb); |
| DEV_STATS_INC(dev, tx_dropped); |
| return NETDEV_TX_OK; |
| } |
| |
| len = skb->len; |
| skb = macsec_encrypt(skb, dev); |
| if (IS_ERR(skb)) { |
| if (PTR_ERR(skb) != -EINPROGRESS) |
| DEV_STATS_INC(dev, tx_dropped); |
| return NETDEV_TX_OK; |
| } |
| |
| macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa); |
| |
| macsec_encrypt_finish(skb, dev); |
| ret = dev_queue_xmit(skb); |
| count_tx(dev, ret, len); |
| return ret; |
| } |
| |
| #define MACSEC_FEATURES \ |
| (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) |
| |
| static int macsec_dev_init(struct net_device *dev) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct net_device *real_dev = macsec->real_dev; |
| int err; |
| |
| dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
| if (!dev->tstats) |
| return -ENOMEM; |
| |
| err = gro_cells_init(&macsec->gro_cells, dev); |
| if (err) { |
| free_percpu(dev->tstats); |
| return err; |
| } |
| |
| dev->features = real_dev->features & MACSEC_FEATURES; |
| dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE; |
| |
| dev->needed_headroom = real_dev->needed_headroom + |
| MACSEC_NEEDED_HEADROOM; |
| dev->needed_tailroom = real_dev->needed_tailroom + |
| MACSEC_NEEDED_TAILROOM; |
| |
| if (is_zero_ether_addr(dev->dev_addr)) |
| eth_hw_addr_inherit(dev, real_dev); |
| if (is_zero_ether_addr(dev->broadcast)) |
| memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); |
| |
| /* Get macsec's reference to real_dev */ |
| netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL); |
| |
| return 0; |
| } |
| |
| static void macsec_dev_uninit(struct net_device *dev) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| |
| gro_cells_destroy(&macsec->gro_cells); |
| free_percpu(dev->tstats); |
| } |
| |
| static netdev_features_t macsec_fix_features(struct net_device *dev, |
| netdev_features_t features) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct net_device *real_dev = macsec->real_dev; |
| |
| features &= (real_dev->features & MACSEC_FEATURES) | |
| NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES; |
| features |= NETIF_F_LLTX; |
| |
| return features; |
| } |
| |
| static int macsec_dev_open(struct net_device *dev) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct net_device *real_dev = macsec->real_dev; |
| int err; |
| |
| err = dev_uc_add(real_dev, dev->dev_addr); |
| if (err < 0) |
| return err; |
| |
| if (dev->flags & IFF_ALLMULTI) { |
| err = dev_set_allmulti(real_dev, 1); |
| if (err < 0) |
| goto del_unicast; |
| } |
| |
| if (dev->flags & IFF_PROMISC) { |
| err = dev_set_promiscuity(real_dev, 1); |
| if (err < 0) |
| goto clear_allmulti; |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| err = -EOPNOTSUPP; |
| goto clear_allmulti; |
| } |
| |
| ctx.secy = &macsec->secy; |
| err = macsec_offload(ops->mdo_dev_open, &ctx); |
| if (err) |
| goto clear_allmulti; |
| } |
| |
| if (netif_carrier_ok(real_dev)) |
| netif_carrier_on(dev); |
| |
| return 0; |
| clear_allmulti: |
| if (dev->flags & IFF_ALLMULTI) |
| dev_set_allmulti(real_dev, -1); |
| del_unicast: |
| dev_uc_del(real_dev, dev->dev_addr); |
| netif_carrier_off(dev); |
| return err; |
| } |
| |
| static int macsec_dev_stop(struct net_device *dev) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct net_device *real_dev = macsec->real_dev; |
| |
| netif_carrier_off(dev); |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(macsec, &ctx); |
| if (ops) { |
| ctx.secy = &macsec->secy; |
| macsec_offload(ops->mdo_dev_stop, &ctx); |
| } |
| } |
| |
| dev_mc_unsync(real_dev, dev); |
| dev_uc_unsync(real_dev, dev); |
| |
| if (dev->flags & IFF_ALLMULTI) |
| dev_set_allmulti(real_dev, -1); |
| |
| if (dev->flags & IFF_PROMISC) |
| dev_set_promiscuity(real_dev, -1); |
| |
| dev_uc_del(real_dev, dev->dev_addr); |
| |
| return 0; |
| } |
| |
| static void macsec_dev_change_rx_flags(struct net_device *dev, int change) |
| { |
| struct net_device *real_dev = macsec_priv(dev)->real_dev; |
| |
| if (!(dev->flags & IFF_UP)) |
| return; |
| |
| if (change & IFF_ALLMULTI) |
| dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); |
| |
| if (change & IFF_PROMISC) |
| dev_set_promiscuity(real_dev, |
| dev->flags & IFF_PROMISC ? 1 : -1); |
| } |
| |
| static void macsec_dev_set_rx_mode(struct net_device *dev) |
| { |
| struct net_device *real_dev = macsec_priv(dev)->real_dev; |
| |
| dev_mc_sync(real_dev, dev); |
| dev_uc_sync(real_dev, dev); |
| } |
| |
| static int macsec_set_mac_address(struct net_device *dev, void *p) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct net_device *real_dev = macsec->real_dev; |
| struct sockaddr *addr = p; |
| int err; |
| |
| if (!is_valid_ether_addr(addr->sa_data)) |
| return -EADDRNOTAVAIL; |
| |
| if (!(dev->flags & IFF_UP)) |
| goto out; |
| |
| err = dev_uc_add(real_dev, addr->sa_data); |
| if (err < 0) |
| return err; |
| |
| dev_uc_del(real_dev, dev->dev_addr); |
| |
| out: |
| eth_hw_addr_set(dev, addr->sa_data); |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(macsec, &ctx); |
| if (ops) { |
| ctx.secy = &macsec->secy; |
| macsec_offload(ops->mdo_upd_secy, &ctx); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int macsec_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true); |
| |
| if (macsec->real_dev->mtu - extra < new_mtu) |
| return -ERANGE; |
| |
| dev->mtu = new_mtu; |
| |
| return 0; |
| } |
| |
| static void macsec_get_stats64(struct net_device *dev, |
| struct rtnl_link_stats64 *s) |
| { |
| if (!dev->tstats) |
| return; |
| |
| dev_fetch_sw_netstats(s, dev->tstats); |
| |
| s->rx_dropped = atomic_long_read(&dev->stats.__rx_dropped); |
| s->tx_dropped = atomic_long_read(&dev->stats.__tx_dropped); |
| s->rx_errors = atomic_long_read(&dev->stats.__rx_errors); |
| } |
| |
| static int macsec_get_iflink(const struct net_device *dev) |
| { |
| return macsec_priv(dev)->real_dev->ifindex; |
| } |
| |
| static const struct net_device_ops macsec_netdev_ops = { |
| .ndo_init = macsec_dev_init, |
| .ndo_uninit = macsec_dev_uninit, |
| .ndo_open = macsec_dev_open, |
| .ndo_stop = macsec_dev_stop, |
| .ndo_fix_features = macsec_fix_features, |
| .ndo_change_mtu = macsec_change_mtu, |
| .ndo_set_rx_mode = macsec_dev_set_rx_mode, |
| .ndo_change_rx_flags = macsec_dev_change_rx_flags, |
| .ndo_set_mac_address = macsec_set_mac_address, |
| .ndo_start_xmit = macsec_start_xmit, |
| .ndo_get_stats64 = macsec_get_stats64, |
| .ndo_get_iflink = macsec_get_iflink, |
| }; |
| |
| static const struct device_type macsec_type = { |
| .name = "macsec", |
| }; |
| |
| static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = { |
| [IFLA_MACSEC_SCI] = { .type = NLA_U64 }, |
| [IFLA_MACSEC_PORT] = { .type = NLA_U16 }, |
| [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 }, |
| [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 }, |
| [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_ES] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_SCB] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 }, |
| [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 }, |
| }; |
| |
| static void macsec_free_netdev(struct net_device *dev) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| |
| if (macsec->secy.tx_sc.md_dst) |
| metadata_dst_free(macsec->secy.tx_sc.md_dst); |
| free_percpu(macsec->stats); |
| free_percpu(macsec->secy.tx_sc.stats); |
| |
| /* Get rid of the macsec's reference to real_dev */ |
| netdev_put(macsec->real_dev, &macsec->dev_tracker); |
| } |
| |
| static void macsec_setup(struct net_device *dev) |
| { |
| ether_setup(dev); |
| dev->min_mtu = 0; |
| dev->max_mtu = ETH_MAX_MTU; |
| dev->priv_flags |= IFF_NO_QUEUE; |
| dev->netdev_ops = &macsec_netdev_ops; |
| dev->needs_free_netdev = true; |
| dev->priv_destructor = macsec_free_netdev; |
| SET_NETDEV_DEVTYPE(dev, &macsec_type); |
| |
| eth_zero_addr(dev->broadcast); |
| } |
| |
| static int macsec_changelink_common(struct net_device *dev, |
| struct nlattr *data[]) |
| { |
| struct macsec_secy *secy; |
| struct macsec_tx_sc *tx_sc; |
| |
| secy = &macsec_priv(dev)->secy; |
| tx_sc = &secy->tx_sc; |
| |
| if (data[IFLA_MACSEC_ENCODING_SA]) { |
| struct macsec_tx_sa *tx_sa; |
| |
| tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]); |
| tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]); |
| |
| secy->operational = tx_sa && tx_sa->active; |
| } |
| |
| if (data[IFLA_MACSEC_ENCRYPT]) |
| tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); |
| |
| if (data[IFLA_MACSEC_PROTECT]) |
| secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]); |
| |
| if (data[IFLA_MACSEC_INC_SCI]) |
| tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); |
| |
| if (data[IFLA_MACSEC_ES]) |
| tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]); |
| |
| if (data[IFLA_MACSEC_SCB]) |
| tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]); |
| |
| if (data[IFLA_MACSEC_REPLAY_PROTECT]) |
| secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]); |
| |
| if (data[IFLA_MACSEC_VALIDATION]) |
| secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]); |
| |
| if (data[IFLA_MACSEC_CIPHER_SUITE]) { |
| switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) { |
| case MACSEC_CIPHER_ID_GCM_AES_128: |
| case MACSEC_DEFAULT_CIPHER_ID: |
| secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
| secy->xpn = false; |
| break; |
| case MACSEC_CIPHER_ID_GCM_AES_256: |
| secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; |
| secy->xpn = false; |
| break; |
| case MACSEC_CIPHER_ID_GCM_AES_XPN_128: |
| secy->key_len = MACSEC_GCM_AES_128_SAK_LEN; |
| secy->xpn = true; |
| break; |
| case MACSEC_CIPHER_ID_GCM_AES_XPN_256: |
| secy->key_len = MACSEC_GCM_AES_256_SAK_LEN; |
| secy->xpn = true; |
| break; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| if (data[IFLA_MACSEC_WINDOW]) { |
| secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); |
| |
| /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window |
| * for XPN cipher suites */ |
| if (secy->xpn && |
| secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW) |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], |
| struct nlattr *data[], |
| struct netlink_ext_ack *extack) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| bool macsec_offload_state_change = false; |
| enum macsec_offload offload; |
| struct macsec_tx_sc tx_sc; |
| struct macsec_secy secy; |
| int ret; |
| |
| if (!data) |
| return 0; |
| |
| if (data[IFLA_MACSEC_CIPHER_SUITE] || |
| data[IFLA_MACSEC_ICV_LEN] || |
| data[IFLA_MACSEC_SCI] || |
| data[IFLA_MACSEC_PORT]) |
| return -EINVAL; |
| |
| /* Keep a copy of unmodified secy and tx_sc, in case the offload |
| * propagation fails, to revert macsec_changelink_common. |
| */ |
| memcpy(&secy, &macsec->secy, sizeof(secy)); |
| memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc)); |
| |
| ret = macsec_changelink_common(dev, data); |
| if (ret) |
| goto cleanup; |
| |
| if (data[IFLA_MACSEC_OFFLOAD]) { |
| offload = nla_get_u8(data[IFLA_MACSEC_OFFLOAD]); |
| if (macsec->offload != offload) { |
| macsec_offload_state_change = true; |
| ret = macsec_update_offload(dev, offload); |
| if (ret) |
| goto cleanup; |
| } |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (!macsec_offload_state_change && macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (!ops) { |
| ret = -EOPNOTSUPP; |
| goto cleanup; |
| } |
| |
| ctx.secy = &macsec->secy; |
| ret = macsec_offload(ops->mdo_upd_secy, &ctx); |
| if (ret) |
| goto cleanup; |
| } |
| |
| return 0; |
| |
| cleanup: |
| memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc)); |
| memcpy(&macsec->secy, &secy, sizeof(secy)); |
| |
| return ret; |
| } |
| |
| static void macsec_del_dev(struct macsec_dev *macsec) |
| { |
| int i; |
| |
| while (macsec->secy.rx_sc) { |
| struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc); |
| |
| rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next); |
| free_rx_sc(rx_sc); |
| } |
| |
| for (i = 0; i < MACSEC_NUM_AN; i++) { |
| struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]); |
| |
| if (sa) { |
| RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL); |
| clear_tx_sa(sa); |
| } |
| } |
| } |
| |
| static void macsec_common_dellink(struct net_device *dev, struct list_head *head) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct net_device *real_dev = macsec->real_dev; |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(netdev_priv(dev), &ctx); |
| if (ops) { |
| ctx.secy = &macsec->secy; |
| macsec_offload(ops->mdo_del_secy, &ctx); |
| } |
| } |
| |
| unregister_netdevice_queue(dev, head); |
| list_del_rcu(&macsec->secys); |
| macsec_del_dev(macsec); |
| netdev_upper_dev_unlink(real_dev, dev); |
| |
| macsec_generation++; |
| } |
| |
| static void macsec_dellink(struct net_device *dev, struct list_head *head) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct net_device *real_dev = macsec->real_dev; |
| struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); |
| |
| macsec_common_dellink(dev, head); |
| |
| if (list_empty(&rxd->secys)) { |
| netdev_rx_handler_unregister(real_dev); |
| kfree(rxd); |
| } |
| } |
| |
| static int register_macsec_dev(struct net_device *real_dev, |
| struct net_device *dev) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev); |
| |
| if (!rxd) { |
| int err; |
| |
| rxd = kmalloc(sizeof(*rxd), GFP_KERNEL); |
| if (!rxd) |
| return -ENOMEM; |
| |
| INIT_LIST_HEAD(&rxd->secys); |
| |
| err = netdev_rx_handler_register(real_dev, macsec_handle_frame, |
| rxd); |
| if (err < 0) { |
| kfree(rxd); |
| return err; |
| } |
| } |
| |
| list_add_tail_rcu(&macsec->secys, &rxd->secys); |
| return 0; |
| } |
| |
| static bool sci_exists(struct net_device *dev, sci_t sci) |
| { |
| struct macsec_rxh_data *rxd = macsec_data_rtnl(dev); |
| struct macsec_dev *macsec; |
| |
| list_for_each_entry(macsec, &rxd->secys, secys) { |
| if (macsec->secy.sci == sci) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static sci_t dev_to_sci(struct net_device *dev, __be16 port) |
| { |
| return make_sci(dev->dev_addr, port); |
| } |
| |
| static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| struct macsec_secy *secy = &macsec->secy; |
| |
| macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats); |
| if (!macsec->stats) |
| return -ENOMEM; |
| |
| secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats); |
| if (!secy->tx_sc.stats) |
| return -ENOMEM; |
| |
| secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL); |
| if (!secy->tx_sc.md_dst) |
| /* macsec and secy percpu stats will be freed when unregistering |
| * net_device in macsec_free_netdev() |
| */ |
| return -ENOMEM; |
| |
| if (sci == MACSEC_UNDEF_SCI) |
| sci = dev_to_sci(dev, MACSEC_PORT_ES); |
| |
| secy->netdev = dev; |
| secy->operational = true; |
| secy->key_len = DEFAULT_SAK_LEN; |
| secy->icv_len = icv_len; |
| secy->validate_frames = MACSEC_VALIDATE_DEFAULT; |
| secy->protect_frames = true; |
| secy->replay_protect = false; |
| secy->xpn = DEFAULT_XPN; |
| |
| secy->sci = sci; |
| secy->tx_sc.md_dst->u.macsec_info.sci = sci; |
| secy->tx_sc.active = true; |
| secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; |
| secy->tx_sc.encrypt = DEFAULT_ENCRYPT; |
| secy->tx_sc.send_sci = DEFAULT_SEND_SCI; |
| secy->tx_sc.end_station = false; |
| secy->tx_sc.scb = false; |
| |
| return 0; |
| } |
| |
| static struct lock_class_key macsec_netdev_addr_lock_key; |
| |
| static int macsec_newlink(struct net *net, struct net_device *dev, |
| struct nlattr *tb[], struct nlattr *data[], |
| struct netlink_ext_ack *extack) |
| { |
| struct macsec_dev *macsec = macsec_priv(dev); |
| rx_handler_func_t *rx_handler; |
| u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
| struct net_device *real_dev; |
| int err, mtu; |
| sci_t sci; |
| |
| if (!tb[IFLA_LINK]) |
| return -EINVAL; |
| real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); |
| if (!real_dev) |
| return -ENODEV; |
| if (real_dev->type != ARPHRD_ETHER) |
| return -EINVAL; |
| |
| dev->priv_flags |= IFF_MACSEC; |
| |
| macsec->real_dev = real_dev; |
| |
| if (data && data[IFLA_MACSEC_OFFLOAD]) |
| macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]); |
| else |
| /* MACsec offloading is off by default */ |
| macsec->offload = MACSEC_OFFLOAD_OFF; |
| |
| /* Check if the offloading mode is supported by the underlying layers */ |
| if (macsec->offload != MACSEC_OFFLOAD_OFF && |
| !macsec_check_offload(macsec->offload, macsec)) |
| return -EOPNOTSUPP; |
| |
| /* send_sci must be set to true when transmit sci explicitly is set */ |
| if ((data && data[IFLA_MACSEC_SCI]) && |
| (data && data[IFLA_MACSEC_INC_SCI])) { |
| u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]); |
| |
| if (!send_sci) |
| return -EINVAL; |
| } |
| |
| if (data && data[IFLA_MACSEC_ICV_LEN]) |
| icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
| mtu = real_dev->mtu - icv_len - macsec_extra_len(true); |
| if (mtu < 0) |
| dev->mtu = 0; |
| else |
| dev->mtu = mtu; |
| |
| rx_handler = rtnl_dereference(real_dev->rx_handler); |
| if (rx_handler && rx_handler != macsec_handle_frame) |
| return -EBUSY; |
| |
| err = register_netdevice(dev); |
| if (err < 0) |
| return err; |
| |
| netdev_lockdep_set_classes(dev); |
| lockdep_set_class(&dev->addr_list_lock, |
| &macsec_netdev_addr_lock_key); |
| |
| err = netdev_upper_dev_link(real_dev, dev, extack); |
| if (err < 0) |
| goto unregister; |
| |
| /* need to be already registered so that ->init has run and |
| * the MAC addr is set |
| */ |
| if (data && data[IFLA_MACSEC_SCI]) |
| sci = nla_get_sci(data[IFLA_MACSEC_SCI]); |
| else if (data && data[IFLA_MACSEC_PORT]) |
| sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT])); |
| else |
| sci = dev_to_sci(dev, MACSEC_PORT_ES); |
| |
| if (rx_handler && sci_exists(real_dev, sci)) { |
| err = -EBUSY; |
| goto unlink; |
| } |
| |
| err = macsec_add_dev(dev, sci, icv_len); |
| if (err) |
| goto unlink; |
| |
| if (data) { |
| err = macsec_changelink_common(dev, data); |
| if (err) |
| goto del_dev; |
| } |
| |
| /* If h/w offloading is available, propagate to the device */ |
| if (macsec_is_offloaded(macsec)) { |
| const struct macsec_ops *ops; |
| struct macsec_context ctx; |
| |
| ops = macsec_get_ops(macsec, &ctx); |
| if (ops) { |
| ctx.secy = &macsec->secy; |
| err = macsec_offload(ops->mdo_add_secy, &ctx); |
| if (err) |
| goto del_dev; |
| } |
| } |
| |
| err = register_macsec_dev(real_dev, dev); |
| if (err < 0) |
| goto del_dev; |
| |
| netif_stacked_transfer_operstate(real_dev, dev); |
| linkwatch_fire_event(dev); |
| |
| macsec_generation++; |
| |
| return 0; |
| |
| del_dev: |
| macsec_del_dev(macsec); |
| unlink: |
| netdev_upper_dev_unlink(real_dev, dev); |
| unregister: |
| unregister_netdevice(dev); |
| return err; |
| } |
| |
| static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[], |
| struct netlink_ext_ack *extack) |
| { |
| u64 csid = MACSEC_DEFAULT_CIPHER_ID; |
| u8 icv_len = MACSEC_DEFAULT_ICV_LEN; |
| int flag; |
| bool es, scb, sci; |
| |
| if (!data) |
| return 0; |
| |
| if (data[IFLA_MACSEC_CIPHER_SUITE]) |
| csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]); |
| |
| if (data[IFLA_MACSEC_ICV_LEN]) { |
| icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]); |
| if (icv_len != MACSEC_DEFAULT_ICV_LEN) { |
| char dummy_key[DEFAULT_SAK_LEN] = { 0 }; |
| struct crypto_aead *dummy_tfm; |
| |
| dummy_tfm = macsec_alloc_tfm(dummy_key, |
| DEFAULT_SAK_LEN, |
| icv_len); |
| if (IS_ERR(dummy_tfm)) |
| return PTR_ERR(dummy_tfm); |
| crypto_free_aead(dummy_tfm); |
| } |
| } |
| |
| switch (csid) { |
| case MACSEC_CIPHER_ID_GCM_AES_128: |
| case MACSEC_CIPHER_ID_GCM_AES_256: |
| case MACSEC_CIPHER_ID_GCM_AES_XPN_128: |
| case MACSEC_CIPHER_ID_GCM_AES_XPN_256: |
| case MACSEC_DEFAULT_CIPHER_ID: |
| if (icv_len < MACSEC_MIN_ICV_LEN || |
| icv_len > MACSEC_STD_ICV_LEN) |
| return -EINVAL; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (data[IFLA_MACSEC_ENCODING_SA]) { |
| if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN) |
| return -EINVAL; |
| } |
| |
| for (flag = IFLA_MACSEC_ENCODING_SA + 1; |
| flag < IFLA_MACSEC_VALIDATION; |
| flag++) { |
| if (data[flag]) { |
| if (nla_get_u8(data[flag]) > 1) |
| return -EINVAL; |
| } |
| } |
| |
| es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false; |
| sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false; |
| scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false; |
| |
| if ((sci && (scb || es)) || (scb && es)) |
| return -EINVAL; |
| |
| if (data[IFLA_MACSEC_VALIDATION] && |
| nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX) |
| return -EINVAL; |
| |
| if ((data[IFLA_MACSEC_REPLAY_PROTECT] && |
| nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) && |
| !data[IFLA_MACSEC_WINDOW]) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static struct net *macsec_get_link_net(const struct net_device *dev) |
| { |
| return dev_net(macsec_priv(dev)->real_dev); |
| } |
| |
| struct net_device *macsec_get_real_dev(const struct net_device *dev) |
| { |
| return macsec_priv(dev)->real_dev; |
| } |
| EXPORT_SYMBOL_GPL(macsec_get_real_dev); |
| |
| bool macsec_netdev_is_offloaded(struct net_device *dev) |
| { |
| return macsec_is_offloaded(macsec_priv(dev)); |
| } |
| EXPORT_SYMBOL_GPL(macsec_netdev_is_offloaded); |
| |
| static size_t macsec_get_size(const struct net_device *dev) |
| { |
| return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */ |
| nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */ |
| nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */ |
| nla_total_size(4) + /* IFLA_MACSEC_WINDOW */ |
| nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */ |
| nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */ |
| nla_total_size(1) + /* IFLA_MACSEC_PROTECT */ |
| nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */ |
| nla_total_size(1) + /* IFLA_MACSEC_ES */ |
| nla_total_size(1) + /* IFLA_MACSEC_SCB */ |
| nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */ |
| nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */ |
| nla_total_size(1) + /* IFLA_MACSEC_OFFLOAD */ |
| 0; |
| } |
| |
| static int macsec_fill_info(struct sk_buff *skb, |
| const struct net_device *dev) |
| { |
| struct macsec_tx_sc *tx_sc; |
| struct macsec_dev *macsec; |
| struct macsec_secy *secy; |
| u64 csid; |
| |
| macsec = macsec_priv(dev); |
| secy = &macsec->secy; |
| tx_sc = &secy->tx_sc; |
| |
| switch (secy->key_len) { |
| case MACSEC_GCM_AES_128_SAK_LEN: |
| csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID; |
| break; |
| case MACSEC_GCM_AES_256_SAK_LEN: |
| csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256; |
| break; |
| default: |
| goto nla_put_failure; |
| } |
| |
| if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci, |
| IFLA_MACSEC_PAD) || |
| nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) || |
| nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE, |
| csid, IFLA_MACSEC_PAD) || |
| nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) || |
| nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) || |
| nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) || |
| nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) || |
| nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) || |
| nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) || |
| nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) || |
| nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) || |
| nla_put_u8(skb, IFLA_MACSEC_OFFLOAD, macsec->offload) || |
| 0) |
| goto nla_put_failure; |
| |
| if (secy->replay_protect) { |
| if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window)) |
| goto nla_put_failure; |
| } |
| |
| return 0; |
| |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| static struct rtnl_link_ops macsec_link_ops __read_mostly = { |
| .kind = "macsec", |
| .priv_size = sizeof(struct macsec_dev), |
| .maxtype = IFLA_MACSEC_MAX, |
| .policy = macsec_rtnl_policy, |
| .setup = macsec_setup, |
| .validate = macsec_validate_attr, |
| .newlink = macsec_newlink, |
| .changelink = macsec_changelink, |
| .dellink = macsec_dellink, |
| .get_size = macsec_get_size, |
| .fill_info = macsec_fill_info, |
| .get_link_net = macsec_get_link_net, |
| }; |
| |
| static bool is_macsec_master(struct net_device *dev) |
| { |
| return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame; |
| } |
| |
| static int macsec_notify(struct notifier_block *this, unsigned long event, |
| void *ptr) |
| { |
| struct net_device *real_dev = netdev_notifier_info_to_dev(ptr); |
| LIST_HEAD(head); |
| |
| if (!is_macsec_master(real_dev)) |
| return NOTIFY_DONE; |
| |
| switch (event) { |
| case NETDEV_DOWN: |
| case NETDEV_UP: |
| case NETDEV_CHANGE: { |
| struct macsec_dev *m, *n; |
| struct macsec_rxh_data *rxd; |
| |
| rxd = macsec_data_rtnl(real_dev); |
| list_for_each_entry_safe(m, n, &rxd->secys, secys) { |
| struct net_device *dev = m->secy.netdev; |
| |
| netif_stacked_transfer_operstate(real_dev, dev); |
| } |
| break; |
| } |
| case NETDEV_UNREGISTER: { |
| struct macsec_dev *m, *n; |
| struct macsec_rxh_data *rxd; |
| |
| rxd = macsec_data_rtnl(real_dev); |
| list_for_each_entry_safe(m, n, &rxd->secys, secys) { |
| macsec_common_dellink(m->secy.netdev, &head); |
| } |
| |
| netdev_rx_handler_unregister(real_dev); |
| kfree(rxd); |
| |
| unregister_netdevice_many(&head); |
| break; |
| } |
| case NETDEV_CHANGEMTU: { |
| struct macsec_dev *m; |
| struct macsec_rxh_data *rxd; |
| |
| rxd = macsec_data_rtnl(real_dev); |
| list_for_each_entry(m, &rxd->secys, secys) { |
| struct net_device *dev = m->secy.netdev; |
| unsigned int mtu = real_dev->mtu - (m->secy.icv_len + |
| macsec_extra_len(true)); |
| |
| if (dev->mtu > mtu) |
| dev_set_mtu(dev, mtu); |
| } |
| } |
| } |
| |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block macsec_notifier = { |
| .notifier_call = macsec_notify, |
| }; |
| |
| static int __init macsec_init(void) |
| { |
| int err; |
| |
| pr_info("MACsec IEEE 802.1AE\n"); |
| err = register_netdevice_notifier(&macsec_notifier); |
| if (err) |
| return err; |
| |
| err = rtnl_link_register(&macsec_link_ops); |
| if (err) |
| goto notifier; |
| |
| err = genl_register_family(&macsec_fam); |
| if (err) |
| goto rtnl; |
| |
| return 0; |
| |
| rtnl: |
| rtnl_link_unregister(&macsec_link_ops); |
| notifier: |
| unregister_netdevice_notifier(&macsec_notifier); |
| return err; |
| } |
| |
| static void __exit macsec_exit(void) |
| { |
| genl_unregister_family(&macsec_fam); |
| rtnl_link_unregister(&macsec_link_ops); |
| unregister_netdevice_notifier(&macsec_notifier); |
| rcu_barrier(); |
| } |
| |
| module_init(macsec_init); |
| module_exit(macsec_exit); |
| |
| MODULE_ALIAS_RTNL_LINK("macsec"); |
| MODULE_ALIAS_GENL_FAMILY("macsec"); |
| |
| MODULE_DESCRIPTION("MACsec IEEE 802.1AE"); |
| MODULE_LICENSE("GPL v2"); |
