![Sabrina Dubroca](/assets/img/avatar_default.png)
Commitccfdec9089
("macsec: Add support for GCM-AES-256 cipher suite") changed a few values in the uapi headers for MACsec. Because of existing userspace implementations, we need to preserve the value of MACSEC_DEFAULT_CIPHER_ID. Not doing that resulted in wpa_supplicant segfaults when a secure channel was created using the default cipher. Thus, swap MACSEC_DEFAULT_CIPHER_{ID,ALT} back to their original values. Changing the maximum length of the MACSEC_SA_ATTR_KEY attribute is unnecessary, as the previous value (MACSEC_MAX_KEY_LEN, which was 128B) is large enough to carry 32-bytes keys. This patch reverts MACSEC_MAX_KEY_LEN to 128B and restores the old length check on MACSEC_SA_ATTR_KEY. Fixes:ccfdec9089
("macsec: Add support for GCM-AES-256 cipher suite") Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net>
3575 lines
86 KiB
C
3575 lines
86 KiB
C
/*
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* drivers/net/macsec.c - MACsec device
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*
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* Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/skbuff.h>
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#include <linux/socket.h>
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#include <linux/module.h>
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#include <crypto/aead.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/refcount.h>
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#include <net/genetlink.h>
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#include <net/sock.h>
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#include <net/gro_cells.h>
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#include <uapi/linux/if_macsec.h>
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typedef u64 __bitwise sci_t;
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#define MACSEC_SCI_LEN 8
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/* SecTAG length = macsec_eth_header without the optional SCI */
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#define MACSEC_TAG_LEN 6
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struct macsec_eth_header {
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struct ethhdr eth;
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/* SecTAG */
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u8 tci_an;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 short_length:6,
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unused:2;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u8 unused:2,
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short_length:6;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be32 packet_number;
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u8 secure_channel_id[8]; /* optional */
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} __packed;
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#define MACSEC_TCI_VERSION 0x80
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#define MACSEC_TCI_ES 0x40 /* end station */
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#define MACSEC_TCI_SC 0x20 /* SCI present */
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#define MACSEC_TCI_SCB 0x10 /* epon */
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#define MACSEC_TCI_E 0x08 /* encryption */
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#define MACSEC_TCI_C 0x04 /* changed text */
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#define MACSEC_AN_MASK 0x03 /* association number */
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#define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
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/* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
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#define MIN_NON_SHORT_LEN 48
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#define GCM_AES_IV_LEN 12
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#define DEFAULT_ICV_LEN 16
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#define MACSEC_NUM_AN 4 /* 2 bits for the association number */
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#define for_each_rxsc(secy, sc) \
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for (sc = rcu_dereference_bh(secy->rx_sc); \
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sc; \
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sc = rcu_dereference_bh(sc->next))
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#define for_each_rxsc_rtnl(secy, sc) \
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for (sc = rtnl_dereference(secy->rx_sc); \
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sc; \
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sc = rtnl_dereference(sc->next))
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struct gcm_iv {
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union {
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u8 secure_channel_id[8];
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sci_t sci;
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};
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__be32 pn;
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};
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/**
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* struct macsec_key - SA key
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* @id: user-provided key identifier
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* @tfm: crypto struct, key storage
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*/
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struct macsec_key {
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u8 id[MACSEC_KEYID_LEN];
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struct crypto_aead *tfm;
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};
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struct macsec_rx_sc_stats {
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__u64 InOctetsValidated;
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__u64 InOctetsDecrypted;
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__u64 InPktsUnchecked;
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__u64 InPktsDelayed;
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__u64 InPktsOK;
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__u64 InPktsInvalid;
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__u64 InPktsLate;
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__u64 InPktsNotValid;
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__u64 InPktsNotUsingSA;
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__u64 InPktsUnusedSA;
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};
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struct macsec_rx_sa_stats {
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__u32 InPktsOK;
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__u32 InPktsInvalid;
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__u32 InPktsNotValid;
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__u32 InPktsNotUsingSA;
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__u32 InPktsUnusedSA;
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};
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struct macsec_tx_sa_stats {
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__u32 OutPktsProtected;
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__u32 OutPktsEncrypted;
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};
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struct macsec_tx_sc_stats {
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__u64 OutPktsProtected;
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__u64 OutPktsEncrypted;
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__u64 OutOctetsProtected;
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__u64 OutOctetsEncrypted;
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};
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struct macsec_dev_stats {
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__u64 OutPktsUntagged;
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__u64 InPktsUntagged;
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__u64 OutPktsTooLong;
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__u64 InPktsNoTag;
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__u64 InPktsBadTag;
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__u64 InPktsUnknownSCI;
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__u64 InPktsNoSCI;
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__u64 InPktsOverrun;
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};
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/**
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* struct macsec_rx_sa - receive secure association
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* @active:
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* @next_pn: packet number expected for the next packet
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* @lock: protects next_pn manipulations
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* @key: key structure
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* @stats: per-SA stats
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*/
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struct macsec_rx_sa {
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struct macsec_key key;
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spinlock_t lock;
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u32 next_pn;
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refcount_t refcnt;
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bool active;
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struct macsec_rx_sa_stats __percpu *stats;
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struct macsec_rx_sc *sc;
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struct rcu_head rcu;
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};
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struct pcpu_rx_sc_stats {
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struct macsec_rx_sc_stats stats;
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struct u64_stats_sync syncp;
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};
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/**
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* struct macsec_rx_sc - receive secure channel
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* @sci: secure channel identifier for this SC
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* @active: channel is active
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* @sa: array of secure associations
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* @stats: per-SC stats
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*/
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struct macsec_rx_sc {
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struct macsec_rx_sc __rcu *next;
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sci_t sci;
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bool active;
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struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
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struct pcpu_rx_sc_stats __percpu *stats;
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refcount_t refcnt;
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struct rcu_head rcu_head;
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};
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/**
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* struct macsec_tx_sa - transmit secure association
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* @active:
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* @next_pn: packet number to use for the next packet
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* @lock: protects next_pn manipulations
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* @key: key structure
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* @stats: per-SA stats
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*/
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struct macsec_tx_sa {
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struct macsec_key key;
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spinlock_t lock;
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u32 next_pn;
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refcount_t refcnt;
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bool active;
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struct macsec_tx_sa_stats __percpu *stats;
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struct rcu_head rcu;
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};
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struct pcpu_tx_sc_stats {
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struct macsec_tx_sc_stats stats;
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struct u64_stats_sync syncp;
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};
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/**
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* struct macsec_tx_sc - transmit secure channel
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* @active:
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* @encoding_sa: association number of the SA currently in use
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* @encrypt: encrypt packets on transmit, or authenticate only
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* @send_sci: always include the SCI in the SecTAG
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* @end_station:
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* @scb: single copy broadcast flag
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* @sa: array of secure associations
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* @stats: stats for this TXSC
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*/
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struct macsec_tx_sc {
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bool active;
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u8 encoding_sa;
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bool encrypt;
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bool send_sci;
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bool end_station;
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bool scb;
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struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
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struct pcpu_tx_sc_stats __percpu *stats;
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};
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#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
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/**
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* struct macsec_secy - MACsec Security Entity
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* @netdev: netdevice for this SecY
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* @n_rx_sc: number of receive secure channels configured on this SecY
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* @sci: secure channel identifier used for tx
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* @key_len: length of keys used by the cipher suite
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* @icv_len: length of ICV used by the cipher suite
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* @validate_frames: validation mode
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* @operational: MAC_Operational flag
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* @protect_frames: enable protection for this SecY
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* @replay_protect: enable packet number checks on receive
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* @replay_window: size of the replay window
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* @tx_sc: transmit secure channel
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* @rx_sc: linked list of receive secure channels
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*/
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struct macsec_secy {
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struct net_device *netdev;
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unsigned int n_rx_sc;
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sci_t sci;
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u16 key_len;
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u16 icv_len;
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enum macsec_validation_type validate_frames;
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bool operational;
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bool protect_frames;
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bool replay_protect;
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u32 replay_window;
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struct macsec_tx_sc tx_sc;
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struct macsec_rx_sc __rcu *rx_sc;
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};
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struct pcpu_secy_stats {
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struct macsec_dev_stats stats;
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struct u64_stats_sync syncp;
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};
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/**
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* struct macsec_dev - private data
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* @secy: SecY config
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* @real_dev: pointer to underlying netdevice
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* @stats: MACsec device stats
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* @secys: linked list of SecY's on the underlying device
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*/
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struct macsec_dev {
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struct macsec_secy secy;
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struct net_device *real_dev;
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struct pcpu_secy_stats __percpu *stats;
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struct list_head secys;
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struct gro_cells gro_cells;
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unsigned int nest_level;
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};
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/**
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* struct macsec_rxh_data - rx_handler private argument
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* @secys: linked list of SecY's on this underlying device
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*/
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struct macsec_rxh_data {
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struct list_head secys;
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};
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static struct macsec_dev *macsec_priv(const struct net_device *dev)
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{
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return (struct macsec_dev *)netdev_priv(dev);
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}
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static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
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{
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return rcu_dereference_bh(dev->rx_handler_data);
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}
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static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
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{
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return rtnl_dereference(dev->rx_handler_data);
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}
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struct macsec_cb {
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struct aead_request *req;
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union {
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struct macsec_tx_sa *tx_sa;
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struct macsec_rx_sa *rx_sa;
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};
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u8 assoc_num;
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bool valid;
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bool has_sci;
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};
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static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
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{
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struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
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if (!sa || !sa->active)
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return NULL;
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if (!refcount_inc_not_zero(&sa->refcnt))
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return NULL;
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return sa;
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}
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static void free_rx_sc_rcu(struct rcu_head *head)
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{
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struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
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free_percpu(rx_sc->stats);
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kfree(rx_sc);
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}
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static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
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{
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return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
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}
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static void macsec_rxsc_put(struct macsec_rx_sc *sc)
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{
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if (refcount_dec_and_test(&sc->refcnt))
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call_rcu(&sc->rcu_head, free_rx_sc_rcu);
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}
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static void free_rxsa(struct rcu_head *head)
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{
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struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
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crypto_free_aead(sa->key.tfm);
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free_percpu(sa->stats);
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kfree(sa);
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}
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static void macsec_rxsa_put(struct macsec_rx_sa *sa)
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{
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if (refcount_dec_and_test(&sa->refcnt))
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call_rcu(&sa->rcu, free_rxsa);
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}
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static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
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{
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struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
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if (!sa || !sa->active)
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return NULL;
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if (!refcount_inc_not_zero(&sa->refcnt))
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return NULL;
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return sa;
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}
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static void free_txsa(struct rcu_head *head)
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{
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struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
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crypto_free_aead(sa->key.tfm);
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free_percpu(sa->stats);
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kfree(sa);
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}
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static void macsec_txsa_put(struct macsec_tx_sa *sa)
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{
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if (refcount_dec_and_test(&sa->refcnt))
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call_rcu(&sa->rcu, free_txsa);
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}
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static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
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{
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BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
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return (struct macsec_cb *)skb->cb;
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}
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#define MACSEC_PORT_ES (htons(0x0001))
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#define MACSEC_PORT_SCB (0x0000)
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#define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
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#define MACSEC_GCM_AES_128_SAK_LEN 16
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#define MACSEC_GCM_AES_256_SAK_LEN 32
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#define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
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#define DEFAULT_SEND_SCI true
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#define DEFAULT_ENCRYPT false
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#define DEFAULT_ENCODING_SA 0
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static bool send_sci(const struct macsec_secy *secy)
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{
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const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
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return tx_sc->send_sci ||
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(secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
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}
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static sci_t make_sci(u8 *addr, __be16 port)
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{
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sci_t sci;
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memcpy(&sci, addr, ETH_ALEN);
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memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
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return sci;
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}
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static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
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{
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sci_t sci;
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if (sci_present)
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memcpy(&sci, hdr->secure_channel_id,
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sizeof(hdr->secure_channel_id));
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else
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sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
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return sci;
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}
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static unsigned int macsec_sectag_len(bool sci_present)
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{
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return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
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}
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static unsigned int macsec_hdr_len(bool sci_present)
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{
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return macsec_sectag_len(sci_present) + ETH_HLEN;
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}
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static unsigned int macsec_extra_len(bool sci_present)
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{
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return macsec_sectag_len(sci_present) + sizeof(__be16);
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}
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/* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
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static void macsec_fill_sectag(struct macsec_eth_header *h,
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const struct macsec_secy *secy, u32 pn,
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bool sci_present)
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{
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const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
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memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
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h->eth.h_proto = htons(ETH_P_MACSEC);
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if (sci_present) {
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h->tci_an |= MACSEC_TCI_SC;
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memcpy(&h->secure_channel_id, &secy->sci,
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sizeof(h->secure_channel_id));
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} else {
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if (tx_sc->end_station)
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h->tci_an |= MACSEC_TCI_ES;
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if (tx_sc->scb)
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h->tci_an |= MACSEC_TCI_SCB;
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}
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h->packet_number = htonl(pn);
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/* with GCM, C/E clear for !encrypt, both set for encrypt */
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if (tx_sc->encrypt)
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h->tci_an |= MACSEC_TCI_CONFID;
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else if (secy->icv_len != DEFAULT_ICV_LEN)
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h->tci_an |= MACSEC_TCI_C;
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h->tci_an |= tx_sc->encoding_sa;
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}
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static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
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{
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if (data_len < MIN_NON_SHORT_LEN)
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h->short_length = data_len;
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}
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/* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
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static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
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{
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struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
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int len = skb->len - 2 * ETH_ALEN;
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int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
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/* a) It comprises at least 17 octets */
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if (skb->len <= 16)
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return false;
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/* b) MACsec EtherType: already checked */
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|
|
|
/* 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 (figure 10-5) */
|
|
if (!h->packet_number)
|
|
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(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 u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
|
|
{
|
|
u32 pn;
|
|
|
|
spin_lock_bh(&tx_sa->lock);
|
|
pn = tx_sa->next_pn;
|
|
|
|
tx_sa->next_pn++;
|
|
if (tx_sa->next_pn == 0) {
|
|
pr_debug("PN wrapped, transitioning to !oper\n");
|
|
tx_sa->active = false;
|
|
if (secy->protect_frames)
|
|
secy->operational = false;
|
|
}
|
|
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 void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
|
|
struct macsec_tx_sa *tx_sa)
|
|
{
|
|
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 += skb->len;
|
|
txsc_stats->stats.OutPktsEncrypted++;
|
|
this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
|
|
} else {
|
|
txsc_stats->stats.OutOctetsProtected += skb->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)) {
|
|
struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
|
|
|
|
u64_stats_update_begin(&stats->syncp);
|
|
stats->tx_packets++;
|
|
stats->tx_bytes += len;
|
|
u64_stats_update_end(&stats->syncp);
|
|
}
|
|
}
|
|
|
|
static void macsec_encrypt_done(struct crypto_async_request *base, int err)
|
|
{
|
|
struct sk_buff *skb = base->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_encrypt_finish(skb, dev);
|
|
macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
|
|
len = skb->len;
|
|
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;
|
|
u32 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 = 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 == 0) {
|
|
macsec_txsa_put(tx_sa);
|
|
kfree_skb(skb);
|
|
return ERR_PTR(-ENOLINK);
|
|
}
|
|
macsec_fill_sectag(hh, secy, pn, 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);
|
|
}
|
|
|
|
macsec_fill_iv(iv, secy->sci, pn);
|
|
|
|
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;
|
|
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 >= secy->replay_window)
|
|
lowest_pn = rx_sa->next_pn - secy->replay_window;
|
|
|
|
/* Now perform replay protection check again
|
|
* (see IEEE 802.1AE-2006 figure 10-5)
|
|
*/
|
|
if (secy->replay_protect && 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);
|
|
return false;
|
|
}
|
|
|
|
if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
|
|
u64_stats_update_begin(&rxsc_stats->syncp);
|
|
if (hdr->tci_an & MACSEC_TCI_E)
|
|
rxsc_stats->stats.InOctetsDecrypted += skb->len;
|
|
else
|
|
rxsc_stats->stats.InOctetsValidated += skb->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);
|
|
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);
|
|
|
|
if (pn >= rx_sa->next_pn)
|
|
rx_sa->next_pn = 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)
|
|
{
|
|
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)
|
|
{
|
|
struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
|
|
|
|
u64_stats_update_begin(&stats->syncp);
|
|
stats->rx_packets++;
|
|
stats->rx_bytes += len;
|
|
u64_stats_update_end(&stats->syncp);
|
|
}
|
|
|
|
static void macsec_decrypt_done(struct crypto_async_request *base, int err)
|
|
{
|
|
struct sk_buff *skb = base->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));
|
|
macsec_reset_skb(skb, macsec->secy.netdev);
|
|
|
|
len = skb->len;
|
|
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;
|
|
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;
|
|
macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
|
|
|
|
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 void handle_not_macsec(struct sk_buff *skb)
|
|
{
|
|
struct macsec_rxh_data *rxd;
|
|
struct macsec_dev *macsec;
|
|
|
|
rcu_read_lock();
|
|
rxd = macsec_data_rcu(skb->dev);
|
|
|
|
/* 10.6 If the management control validateFrames is not
|
|
* Strict, frames without a SecTAG are received, counted, and
|
|
* delivered to the Controlled Port
|
|
*/
|
|
list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
|
|
struct sk_buff *nskb;
|
|
struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
|
|
|
|
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);
|
|
continue;
|
|
}
|
|
|
|
/* deliver on this port */
|
|
nskb = skb_clone(skb, GFP_ATOMIC);
|
|
if (!nskb)
|
|
break;
|
|
|
|
nskb->dev = macsec->secy.netdev;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
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;
|
|
sci_t sci;
|
|
u32 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)) {
|
|
handle_not_macsec(skb);
|
|
|
|
/* and deliver to the uncontrolled port */
|
|
return RX_HANDLER_PASS;
|
|
}
|
|
|
|
skb = skb_unshare(skb, GFP_ATOMIC);
|
|
if (!skb) {
|
|
*pskb = NULL;
|
|
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)) {
|
|
u64_stats_update_begin(&secy_stats->syncp);
|
|
secy_stats->stats.InPktsBadTag++;
|
|
u64_stats_update_end(&secy_stats->syncp);
|
|
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
|
|
*/
|
|
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);
|
|
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);
|
|
goto deliver;
|
|
}
|
|
|
|
/* First, PN check to avoid decrypting obviously wrong packets */
|
|
pn = ntohl(hdr->packet_number);
|
|
if (secy->replay_protect) {
|
|
bool late;
|
|
|
|
spin_lock(&rx_sa->lock);
|
|
late = rx_sa->next_pn >= secy->replay_window &&
|
|
pn < (rx_sa->next_pn - secy->replay_window);
|
|
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);
|
|
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, pn))
|
|
goto drop;
|
|
|
|
deliver:
|
|
macsec_finalize_skb(skb, secy->icv_len,
|
|
macsec_extra_len(macsec_skb_cb(skb)->has_sci));
|
|
macsec_reset_skb(skb, secy->netdev);
|
|
|
|
if (rx_sa)
|
|
macsec_rxsa_put(rx_sa);
|
|
macsec_rxsc_put(rx_sc);
|
|
|
|
ret = gro_cells_receive(&macsec->gro_cells, skb);
|
|
if (ret == NET_RX_SUCCESS)
|
|
count_rx(dev, skb->len);
|
|
else
|
|
macsec->secy.netdev->stats.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, 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);
|
|
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 {
|
|
macsec->secy.netdev->stats.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->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)
|
|
{
|
|
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 = true;
|
|
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->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 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 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 },
|
|
};
|
|
|
|
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] = { .type = NLA_U32 },
|
|
[MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
|
|
.len = MACSEC_KEYID_LEN, },
|
|
[MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
|
|
.len = MACSEC_MAX_KEY_LEN, },
|
|
};
|
|
|
|
static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
|
|
{
|
|
if (!attrs[MACSEC_ATTR_SA_CONFIG])
|
|
return -EINVAL;
|
|
|
|
if (nla_parse_nested(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(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_u32(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;
|
|
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;
|
|
}
|
|
|
|
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_u32(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]);
|
|
|
|
nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
|
|
rx_sa->sc = rx_sc;
|
|
rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
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];
|
|
|
|
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);
|
|
}
|
|
|
|
sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
|
|
|
|
rx_sc = create_rx_sc(dev, sci);
|
|
if (IS_ERR(rx_sc)) {
|
|
rtnl_unlock();
|
|
return PTR_ERR(rx_sc);
|
|
}
|
|
|
|
if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
|
|
rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_u32(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;
|
|
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 (!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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
|
|
|
|
spin_lock_bh(&tx_sa->lock);
|
|
tx_sa->next_pn = nla_get_u32(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]);
|
|
|
|
if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
|
|
secy->operational = true;
|
|
|
|
rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
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];
|
|
|
|
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;
|
|
}
|
|
|
|
RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
|
|
clear_rx_sa(rx_sa);
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
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];
|
|
|
|
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;
|
|
}
|
|
|
|
free_rx_sc(rx_sc);
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
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];
|
|
|
|
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;
|
|
}
|
|
|
|
RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
|
|
clear_tx_sa(tx_sa);
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool validate_upd_sa(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_u32(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];
|
|
|
|
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]) {
|
|
spin_lock_bh(&tx_sa->lock);
|
|
tx_sa->next_pn = nla_get_u32(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]);
|
|
|
|
if (assoc_num == tx_sc->encoding_sa)
|
|
secy->operational = tx_sa->active;
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
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];
|
|
|
|
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]) {
|
|
spin_lock_bh(&rx_sa->lock);
|
|
rx_sa->next_pn = nla_get_u32(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]);
|
|
|
|
rtnl_unlock();
|
|
return 0;
|
|
}
|
|
|
|
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];
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int copy_tx_sa_stats(struct sk_buff *skb,
|
|
struct macsec_tx_sa_stats __percpu *pstats)
|
|
{
|
|
struct macsec_tx_sa_stats sum = {0, };
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
|
|
|
|
sum.OutPktsProtected += stats->OutPktsProtected;
|
|
sum.OutPktsEncrypted += stats->OutPktsEncrypted;
|
|
}
|
|
|
|
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 int copy_rx_sa_stats(struct sk_buff *skb,
|
|
struct macsec_rx_sa_stats __percpu *pstats)
|
|
{
|
|
struct macsec_rx_sa_stats sum = {0, };
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
|
|
|
|
sum.InPktsOK += stats->InPktsOK;
|
|
sum.InPktsInvalid += stats->InPktsInvalid;
|
|
sum.InPktsNotValid += stats->InPktsNotValid;
|
|
sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
|
|
sum.InPktsUnusedSA += stats->InPktsUnusedSA;
|
|
}
|
|
|
|
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 int copy_rx_sc_stats(struct sk_buff *skb,
|
|
struct pcpu_rx_sc_stats __percpu *pstats)
|
|
{
|
|
struct macsec_rx_sc_stats sum = {0, };
|
|
int cpu;
|
|
|
|
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(pstats, cpu);
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&stats->syncp);
|
|
memcpy(&tmp, &stats->stats, sizeof(tmp));
|
|
} while (u64_stats_fetch_retry_irq(&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;
|
|
}
|
|
|
|
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 int copy_tx_sc_stats(struct sk_buff *skb,
|
|
struct pcpu_tx_sc_stats __percpu *pstats)
|
|
{
|
|
struct macsec_tx_sc_stats sum = {0, };
|
|
int cpu;
|
|
|
|
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(pstats, cpu);
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&stats->syncp);
|
|
memcpy(&tmp, &stats->stats, sizeof(tmp));
|
|
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
|
|
|
|
sum.OutPktsProtected += tmp.OutPktsProtected;
|
|
sum.OutPktsEncrypted += tmp.OutPktsEncrypted;
|
|
sum.OutOctetsProtected += tmp.OutOctetsProtected;
|
|
sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
|
|
}
|
|
|
|
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 int copy_secy_stats(struct sk_buff *skb,
|
|
struct pcpu_secy_stats __percpu *pstats)
|
|
{
|
|
struct macsec_dev_stats sum = {0, };
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
const struct pcpu_secy_stats *stats;
|
|
struct macsec_dev_stats tmp;
|
|
unsigned int start;
|
|
|
|
stats = per_cpu_ptr(pstats, cpu);
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&stats->syncp);
|
|
memcpy(&tmp, &stats->stats, sizeof(tmp));
|
|
} while (u64_stats_fetch_retry_irq(&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;
|
|
}
|
|
|
|
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(skb, MACSEC_ATTR_SECY);
|
|
u64 csid;
|
|
|
|
if (!secy_nest)
|
|
return 1;
|
|
|
|
switch (secy->key_len) {
|
|
case MACSEC_GCM_AES_128_SAK_LEN:
|
|
csid = MACSEC_DEFAULT_CIPHER_ID;
|
|
break;
|
|
case MACSEC_GCM_AES_256_SAK_LEN:
|
|
csid = 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 int dump_secy(struct macsec_secy *secy, struct net_device *dev,
|
|
struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct macsec_rx_sc *rx_sc;
|
|
struct macsec_tx_sc *tx_sc = &secy->tx_sc;
|
|
struct nlattr *txsa_list, *rxsc_list;
|
|
int i, j;
|
|
void *hdr;
|
|
struct nlattr *attr;
|
|
|
|
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;
|
|
|
|
if (nla_put_secy(secy, skb))
|
|
goto nla_put_failure;
|
|
|
|
attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
|
|
if (!attr)
|
|
goto nla_put_failure;
|
|
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(skb, MACSEC_ATTR_SECY_STATS);
|
|
if (!attr)
|
|
goto nla_put_failure;
|
|
if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
|
|
nla_nest_cancel(skb, attr);
|
|
goto nla_put_failure;
|
|
}
|
|
nla_nest_end(skb, attr);
|
|
|
|
txsa_list = nla_nest_start(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;
|
|
|
|
if (!tx_sa)
|
|
continue;
|
|
|
|
txsa_nest = nla_nest_start(skb, j++);
|
|
if (!txsa_nest) {
|
|
nla_nest_cancel(skb, txsa_list);
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
|
|
nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
|
|
nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
|
|
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;
|
|
}
|
|
|
|
attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
|
|
if (!attr) {
|
|
nla_nest_cancel(skb, txsa_nest);
|
|
nla_nest_cancel(skb, txsa_list);
|
|
goto nla_put_failure;
|
|
}
|
|
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);
|
|
|
|
nla_nest_end(skb, txsa_nest);
|
|
}
|
|
nla_nest_end(skb, txsa_list);
|
|
|
|
rxsc_list = nla_nest_start(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(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(skb, MACSEC_RXSC_ATTR_STATS);
|
|
if (!attr) {
|
|
nla_nest_cancel(skb, rxsc_nest);
|
|
nla_nest_cancel(skb, rxsc_list);
|
|
goto nla_put_failure;
|
|
}
|
|
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(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;
|
|
|
|
if (!rx_sa)
|
|
continue;
|
|
|
|
rxsa_nest = nla_nest_start(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(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;
|
|
}
|
|
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 (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
|
|
nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
|
|
nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
|
|
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_ops macsec_genl_ops[] = {
|
|
{
|
|
.cmd = MACSEC_CMD_GET_TXSC,
|
|
.dumpit = macsec_dump_txsc,
|
|
.policy = macsec_genl_policy,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_ADD_RXSC,
|
|
.doit = macsec_add_rxsc,
|
|
.policy = macsec_genl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_DEL_RXSC,
|
|
.doit = macsec_del_rxsc,
|
|
.policy = macsec_genl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_UPD_RXSC,
|
|
.doit = macsec_upd_rxsc,
|
|
.policy = macsec_genl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_ADD_TXSA,
|
|
.doit = macsec_add_txsa,
|
|
.policy = macsec_genl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_DEL_TXSA,
|
|
.doit = macsec_del_txsa,
|
|
.policy = macsec_genl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_UPD_TXSA,
|
|
.doit = macsec_upd_txsa,
|
|
.policy = macsec_genl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_ADD_RXSA,
|
|
.doit = macsec_add_rxsa,
|
|
.policy = macsec_genl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_DEL_RXSA,
|
|
.doit = macsec_del_rxsa,
|
|
.policy = macsec_genl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MACSEC_CMD_UPD_RXSA,
|
|
.doit = macsec_upd_rxsa,
|
|
.policy = macsec_genl_policy,
|
|
.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,
|
|
.netnsok = true,
|
|
.module = THIS_MODULE,
|
|
.ops = macsec_genl_ops,
|
|
.n_ops = ARRAY_SIZE(macsec_genl_ops),
|
|
};
|
|
|
|
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;
|
|
|
|
/* 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.tx_dropped++;
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
skb = macsec_encrypt(skb, dev);
|
|
if (IS_ERR(skb)) {
|
|
if (PTR_ERR(skb) != -EINPROGRESS)
|
|
dev->stats.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);
|
|
len = skb->len;
|
|
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 struct lock_class_key macsec_netdev_addr_lock_key;
|
|
|
|
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);
|
|
|
|
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;
|
|
|
|
if (!(real_dev->flags & IFF_UP))
|
|
return -ENETDOWN;
|
|
|
|
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 (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);
|
|
|
|
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:
|
|
ether_addr_copy(dev->dev_addr, addr->sa_data);
|
|
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)
|
|
{
|
|
int cpu;
|
|
|
|
if (!dev->tstats)
|
|
return;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
struct pcpu_sw_netstats *stats;
|
|
struct pcpu_sw_netstats tmp;
|
|
int start;
|
|
|
|
stats = per_cpu_ptr(dev->tstats, cpu);
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&stats->syncp);
|
|
tmp.rx_packets = stats->rx_packets;
|
|
tmp.rx_bytes = stats->rx_bytes;
|
|
tmp.tx_packets = stats->tx_packets;
|
|
tmp.tx_bytes = stats->tx_bytes;
|
|
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
|
|
|
|
s->rx_packets += tmp.rx_packets;
|
|
s->rx_bytes += tmp.rx_bytes;
|
|
s->tx_packets += tmp.tx_packets;
|
|
s->tx_bytes += tmp.tx_bytes;
|
|
}
|
|
|
|
s->rx_dropped = dev->stats.rx_dropped;
|
|
s->tx_dropped = dev->stats.tx_dropped;
|
|
}
|
|
|
|
static int macsec_get_iflink(const struct net_device *dev)
|
|
{
|
|
return macsec_priv(dev)->real_dev->ifindex;
|
|
}
|
|
|
|
|
|
static int macsec_get_nest_level(struct net_device *dev)
|
|
{
|
|
return macsec_priv(dev)->nest_level;
|
|
}
|
|
|
|
|
|
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,
|
|
.ndo_get_lock_subclass = macsec_get_nest_level,
|
|
};
|
|
|
|
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_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 },
|
|
};
|
|
|
|
static void macsec_free_netdev(struct net_device *dev)
|
|
{
|
|
struct macsec_dev *macsec = macsec_priv(dev);
|
|
struct net_device *real_dev = macsec->real_dev;
|
|
|
|
free_percpu(macsec->stats);
|
|
free_percpu(macsec->secy.tx_sc.stats);
|
|
|
|
dev_put(real_dev);
|
|
}
|
|
|
|
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_WINDOW])
|
|
secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
|
|
|
|
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;
|
|
break;
|
|
case MACSEC_CIPHER_ID_GCM_AES_256:
|
|
secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
|
|
struct nlattr *data[],
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
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;
|
|
|
|
return macsec_changelink_common(dev, data);
|
|
}
|
|
|
|
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;
|
|
|
|
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) {
|
|
free_percpu(macsec->stats);
|
|
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->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 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);
|
|
struct net_device *real_dev;
|
|
int err;
|
|
sci_t sci;
|
|
u8 icv_len = DEFAULT_ICV_LEN;
|
|
rx_handler_func_t *rx_handler;
|
|
|
|
if (!tb[IFLA_LINK])
|
|
return -EINVAL;
|
|
real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
|
|
if (!real_dev)
|
|
return -ENODEV;
|
|
|
|
dev->priv_flags |= IFF_MACSEC;
|
|
|
|
macsec->real_dev = real_dev;
|
|
|
|
if (data && data[IFLA_MACSEC_ICV_LEN])
|
|
icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
|
|
dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
|
|
|
|
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;
|
|
|
|
dev_hold(real_dev);
|
|
|
|
macsec->nest_level = dev_get_nest_level(real_dev) + 1;
|
|
netdev_lockdep_set_classes(dev);
|
|
lockdep_set_class_and_subclass(&dev->addr_list_lock,
|
|
&macsec_netdev_addr_lock_key,
|
|
macsec_get_nest_level(dev));
|
|
|
|
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;
|
|
}
|
|
|
|
err = register_macsec_dev(real_dev, dev);
|
|
if (err < 0)
|
|
goto del_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 = 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 != 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_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);
|
|
}
|
|
|
|
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 */
|
|
0;
|
|
}
|
|
|
|
static int macsec_fill_info(struct sk_buff *skb,
|
|
const struct net_device *dev)
|
|
{
|
|
struct macsec_secy *secy = &macsec_priv(dev)->secy;
|
|
struct macsec_tx_sc *tx_sc = &secy->tx_sc;
|
|
u64 csid;
|
|
|
|
switch (secy->key_len) {
|
|
case MACSEC_GCM_AES_128_SAK_LEN:
|
|
csid = MACSEC_DEFAULT_CIPHER_ID;
|
|
break;
|
|
case MACSEC_GCM_AES_256_SAK_LEN:
|
|
csid = 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) ||
|
|
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_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");
|