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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 | /* 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_ */ |