294 lines
6.9 KiB
C
294 lines
6.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* MACsec netdev header, used for h/w accelerated implementations.
|
|
*
|
|
* Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
|
|
*/
|
|
#ifndef _NET_MACSEC_H_
|
|
#define _NET_MACSEC_H_
|
|
|
|
#include <linux/u64_stats_sync.h>
|
|
#include <uapi/linux/if_link.h>
|
|
#include <uapi/linux/if_macsec.h>
|
|
|
|
#define MACSEC_DEFAULT_PN_LEN 4
|
|
#define MACSEC_XPN_PN_LEN 8
|
|
|
|
#define MACSEC_SALT_LEN 12
|
|
#define MACSEC_NUM_AN 4 /* 2 bits for the association number */
|
|
|
|
typedef u64 __bitwise sci_t;
|
|
typedef u32 __bitwise ssci_t;
|
|
|
|
typedef union salt {
|
|
struct {
|
|
u32 ssci;
|
|
u64 pn;
|
|
} __packed;
|
|
u8 bytes[MACSEC_SALT_LEN];
|
|
} __packed salt_t;
|
|
|
|
typedef union pn {
|
|
struct {
|
|
#if defined(__LITTLE_ENDIAN_BITFIELD)
|
|
u32 lower;
|
|
u32 upper;
|
|
#elif defined(__BIG_ENDIAN_BITFIELD)
|
|
u32 upper;
|
|
u32 lower;
|
|
#else
|
|
#error "Please fix <asm/byteorder.h>"
|
|
#endif
|
|
};
|
|
u64 full64;
|
|
} pn_t;
|
|
|
|
/**
|
|
* struct macsec_key - SA key
|
|
* @id: user-provided key identifier
|
|
* @tfm: crypto struct, key storage
|
|
* @salt: salt used to generate IV in XPN cipher suites
|
|
*/
|
|
struct macsec_key {
|
|
u8 id[MACSEC_KEYID_LEN];
|
|
struct crypto_aead *tfm;
|
|
salt_t salt;
|
|
};
|
|
|
|
struct macsec_rx_sc_stats {
|
|
__u64 InOctetsValidated;
|
|
__u64 InOctetsDecrypted;
|
|
__u64 InPktsUnchecked;
|
|
__u64 InPktsDelayed;
|
|
__u64 InPktsOK;
|
|
__u64 InPktsInvalid;
|
|
__u64 InPktsLate;
|
|
__u64 InPktsNotValid;
|
|
__u64 InPktsNotUsingSA;
|
|
__u64 InPktsUnusedSA;
|
|
};
|
|
|
|
struct macsec_rx_sa_stats {
|
|
__u32 InPktsOK;
|
|
__u32 InPktsInvalid;
|
|
__u32 InPktsNotValid;
|
|
__u32 InPktsNotUsingSA;
|
|
__u32 InPktsUnusedSA;
|
|
};
|
|
|
|
struct macsec_tx_sa_stats {
|
|
__u32 OutPktsProtected;
|
|
__u32 OutPktsEncrypted;
|
|
};
|
|
|
|
struct macsec_tx_sc_stats {
|
|
__u64 OutPktsProtected;
|
|
__u64 OutPktsEncrypted;
|
|
__u64 OutOctetsProtected;
|
|
__u64 OutOctetsEncrypted;
|
|
};
|
|
|
|
struct macsec_dev_stats {
|
|
__u64 OutPktsUntagged;
|
|
__u64 InPktsUntagged;
|
|
__u64 OutPktsTooLong;
|
|
__u64 InPktsNoTag;
|
|
__u64 InPktsBadTag;
|
|
__u64 InPktsUnknownSCI;
|
|
__u64 InPktsNoSCI;
|
|
__u64 InPktsOverrun;
|
|
};
|
|
|
|
/**
|
|
* struct macsec_rx_sa - receive secure association
|
|
* @active:
|
|
* @next_pn: packet number expected for the next packet
|
|
* @lock: protects next_pn manipulations
|
|
* @key: key structure
|
|
* @ssci: short secure channel identifier
|
|
* @stats: per-SA stats
|
|
*/
|
|
struct macsec_rx_sa {
|
|
struct macsec_key key;
|
|
ssci_t ssci;
|
|
spinlock_t lock;
|
|
union {
|
|
pn_t next_pn_halves;
|
|
u64 next_pn;
|
|
};
|
|
refcount_t refcnt;
|
|
bool active;
|
|
struct macsec_rx_sa_stats __percpu *stats;
|
|
struct macsec_rx_sc *sc;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
struct pcpu_rx_sc_stats {
|
|
struct macsec_rx_sc_stats stats;
|
|
struct u64_stats_sync syncp;
|
|
};
|
|
|
|
struct pcpu_tx_sc_stats {
|
|
struct macsec_tx_sc_stats stats;
|
|
struct u64_stats_sync syncp;
|
|
};
|
|
|
|
/**
|
|
* struct macsec_rx_sc - receive secure channel
|
|
* @sci: secure channel identifier for this SC
|
|
* @active: channel is active
|
|
* @sa: array of secure associations
|
|
* @stats: per-SC stats
|
|
*/
|
|
struct macsec_rx_sc {
|
|
struct macsec_rx_sc __rcu *next;
|
|
sci_t sci;
|
|
bool active;
|
|
struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
|
|
struct pcpu_rx_sc_stats __percpu *stats;
|
|
refcount_t refcnt;
|
|
struct rcu_head rcu_head;
|
|
};
|
|
|
|
/**
|
|
* struct macsec_tx_sa - transmit secure association
|
|
* @active:
|
|
* @next_pn: packet number to use for the next packet
|
|
* @lock: protects next_pn manipulations
|
|
* @key: key structure
|
|
* @ssci: short secure channel identifier
|
|
* @stats: per-SA stats
|
|
*/
|
|
struct macsec_tx_sa {
|
|
struct macsec_key key;
|
|
ssci_t ssci;
|
|
spinlock_t lock;
|
|
union {
|
|
pn_t next_pn_halves;
|
|
u64 next_pn;
|
|
};
|
|
refcount_t refcnt;
|
|
bool active;
|
|
struct macsec_tx_sa_stats __percpu *stats;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
/**
|
|
* struct macsec_tx_sc - transmit secure channel
|
|
* @active:
|
|
* @encoding_sa: association number of the SA currently in use
|
|
* @encrypt: encrypt packets on transmit, or authenticate only
|
|
* @send_sci: always include the SCI in the SecTAG
|
|
* @end_station:
|
|
* @scb: single copy broadcast flag
|
|
* @sa: array of secure associations
|
|
* @stats: stats for this TXSC
|
|
*/
|
|
struct macsec_tx_sc {
|
|
bool active;
|
|
u8 encoding_sa;
|
|
bool encrypt;
|
|
bool send_sci;
|
|
bool end_station;
|
|
bool scb;
|
|
struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
|
|
struct pcpu_tx_sc_stats __percpu *stats;
|
|
};
|
|
|
|
/**
|
|
* struct macsec_secy - MACsec Security Entity
|
|
* @netdev: netdevice for this SecY
|
|
* @n_rx_sc: number of receive secure channels configured on this SecY
|
|
* @sci: secure channel identifier used for tx
|
|
* @key_len: length of keys used by the cipher suite
|
|
* @icv_len: length of ICV used by the cipher suite
|
|
* @validate_frames: validation mode
|
|
* @xpn: enable XPN for this SecY
|
|
* @operational: MAC_Operational flag
|
|
* @protect_frames: enable protection for this SecY
|
|
* @replay_protect: enable packet number checks on receive
|
|
* @replay_window: size of the replay window
|
|
* @tx_sc: transmit secure channel
|
|
* @rx_sc: linked list of receive secure channels
|
|
*/
|
|
struct macsec_secy {
|
|
struct net_device *netdev;
|
|
unsigned int n_rx_sc;
|
|
sci_t sci;
|
|
u16 key_len;
|
|
u16 icv_len;
|
|
enum macsec_validation_type validate_frames;
|
|
bool xpn;
|
|
bool operational;
|
|
bool protect_frames;
|
|
bool replay_protect;
|
|
u32 replay_window;
|
|
struct macsec_tx_sc tx_sc;
|
|
struct macsec_rx_sc __rcu *rx_sc;
|
|
};
|
|
|
|
/**
|
|
* struct macsec_context - MACsec context for hardware offloading
|
|
*/
|
|
struct macsec_context {
|
|
union {
|
|
struct net_device *netdev;
|
|
struct phy_device *phydev;
|
|
};
|
|
enum macsec_offload offload;
|
|
|
|
struct macsec_secy *secy;
|
|
struct macsec_rx_sc *rx_sc;
|
|
struct {
|
|
unsigned char assoc_num;
|
|
u8 key[MACSEC_KEYID_LEN];
|
|
union {
|
|
struct macsec_rx_sa *rx_sa;
|
|
struct macsec_tx_sa *tx_sa;
|
|
};
|
|
} sa;
|
|
union {
|
|
struct macsec_tx_sc_stats *tx_sc_stats;
|
|
struct macsec_tx_sa_stats *tx_sa_stats;
|
|
struct macsec_rx_sc_stats *rx_sc_stats;
|
|
struct macsec_rx_sa_stats *rx_sa_stats;
|
|
struct macsec_dev_stats *dev_stats;
|
|
} stats;
|
|
|
|
u8 prepare:1;
|
|
};
|
|
|
|
/**
|
|
* struct macsec_ops - MACsec offloading operations
|
|
*/
|
|
struct macsec_ops {
|
|
/* Device wide */
|
|
int (*mdo_dev_open)(struct macsec_context *ctx);
|
|
int (*mdo_dev_stop)(struct macsec_context *ctx);
|
|
/* SecY */
|
|
int (*mdo_add_secy)(struct macsec_context *ctx);
|
|
int (*mdo_upd_secy)(struct macsec_context *ctx);
|
|
int (*mdo_del_secy)(struct macsec_context *ctx);
|
|
/* Security channels */
|
|
int (*mdo_add_rxsc)(struct macsec_context *ctx);
|
|
int (*mdo_upd_rxsc)(struct macsec_context *ctx);
|
|
int (*mdo_del_rxsc)(struct macsec_context *ctx);
|
|
/* Security associations */
|
|
int (*mdo_add_rxsa)(struct macsec_context *ctx);
|
|
int (*mdo_upd_rxsa)(struct macsec_context *ctx);
|
|
int (*mdo_del_rxsa)(struct macsec_context *ctx);
|
|
int (*mdo_add_txsa)(struct macsec_context *ctx);
|
|
int (*mdo_upd_txsa)(struct macsec_context *ctx);
|
|
int (*mdo_del_txsa)(struct macsec_context *ctx);
|
|
/* Statistics */
|
|
int (*mdo_get_dev_stats)(struct macsec_context *ctx);
|
|
int (*mdo_get_tx_sc_stats)(struct macsec_context *ctx);
|
|
int (*mdo_get_tx_sa_stats)(struct macsec_context *ctx);
|
|
int (*mdo_get_rx_sc_stats)(struct macsec_context *ctx);
|
|
int (*mdo_get_rx_sa_stats)(struct macsec_context *ctx);
|
|
};
|
|
|
|
void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa);
|
|
|
|
#endif /* _NET_MACSEC_H_ */
|