1 /* 2 * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved. 3 * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #ifndef _TLS_OFFLOAD_H 35 #define _TLS_OFFLOAD_H 36 37 #include <linux/types.h> 38 #include <asm/byteorder.h> 39 #include <linux/crypto.h> 40 #include <linux/socket.h> 41 #include <linux/tcp.h> 42 #include <linux/skmsg.h> 43 #include <linux/netdevice.h> 44 #include <linux/rcupdate.h> 45 46 #include <net/net_namespace.h> 47 #include <net/tcp.h> 48 #include <net/strparser.h> 49 #include <crypto/aead.h> 50 #include <uapi/linux/tls.h> 51 52 53 /* Maximum data size carried in a TLS record */ 54 #define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14) 55 56 #define TLS_HEADER_SIZE 5 57 #define TLS_NONCE_OFFSET TLS_HEADER_SIZE 58 59 #define TLS_CRYPTO_INFO_READY(info) ((info)->cipher_type) 60 61 #define TLS_RECORD_TYPE_DATA 0x17 62 63 #define TLS_AAD_SPACE_SIZE 13 64 65 #define MAX_IV_SIZE 16 66 #define TLS_MAX_REC_SEQ_SIZE 8 67 68 /* For AES-CCM, the full 16-bytes of IV is made of '4' fields of given sizes. 69 * 70 * IV[16] = b0[1] || implicit nonce[4] || explicit nonce[8] || length[3] 71 * 72 * The field 'length' is encoded in field 'b0' as '(length width - 1)'. 73 * Hence b0 contains (3 - 1) = 2. 74 */ 75 #define TLS_AES_CCM_IV_B0_BYTE 2 76 77 #define __TLS_INC_STATS(net, field) \ 78 __SNMP_INC_STATS((net)->mib.tls_statistics, field) 79 #define TLS_INC_STATS(net, field) \ 80 SNMP_INC_STATS((net)->mib.tls_statistics, field) 81 #define __TLS_DEC_STATS(net, field) \ 82 __SNMP_DEC_STATS((net)->mib.tls_statistics, field) 83 #define TLS_DEC_STATS(net, field) \ 84 SNMP_DEC_STATS((net)->mib.tls_statistics, field) 85 86 enum { 87 TLS_BASE, 88 TLS_SW, 89 TLS_HW, 90 TLS_HW_RECORD, 91 TLS_NUM_CONFIG, 92 }; 93 94 /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages 95 * allocated or mapped for each TLS record. After encryption, the records are 96 * stores in a linked list. 97 */ 98 struct tls_rec { 99 struct list_head list; 100 int tx_ready; 101 int tx_flags; 102 int inplace_crypto; 103 104 struct sk_msg msg_plaintext; 105 struct sk_msg msg_encrypted; 106 107 /* AAD | msg_plaintext.sg.data | sg_tag */ 108 struct scatterlist sg_aead_in[2]; 109 /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */ 110 struct scatterlist sg_aead_out[2]; 111 112 char content_type; 113 struct scatterlist sg_content_type; 114 115 char aad_space[TLS_AAD_SPACE_SIZE]; 116 u8 iv_data[MAX_IV_SIZE]; 117 struct aead_request aead_req; 118 u8 aead_req_ctx[]; 119 }; 120 121 struct tls_msg { 122 struct strp_msg rxm; 123 u8 control; 124 }; 125 126 struct tx_work { 127 struct delayed_work work; 128 struct sock *sk; 129 }; 130 131 struct tls_sw_context_tx { 132 struct crypto_aead *aead_send; 133 struct crypto_wait async_wait; 134 struct tx_work tx_work; 135 struct tls_rec *open_rec; 136 struct list_head tx_list; 137 atomic_t encrypt_pending; 138 int async_notify; 139 u8 async_capable:1; 140 141 #define BIT_TX_SCHEDULED 0 142 #define BIT_TX_CLOSING 1 143 unsigned long tx_bitmask; 144 }; 145 146 struct tls_sw_context_rx { 147 struct crypto_aead *aead_recv; 148 struct crypto_wait async_wait; 149 struct strparser strp; 150 struct sk_buff_head rx_list; /* list of decrypted 'data' records */ 151 void (*saved_data_ready)(struct sock *sk); 152 153 struct sk_buff *recv_pkt; 154 u8 control; 155 u8 async_capable:1; 156 bool decrypted; 157 atomic_t decrypt_pending; 158 bool async_notify; 159 }; 160 161 struct tls_record_info { 162 struct list_head list; 163 u32 end_seq; 164 int len; 165 int num_frags; 166 skb_frag_t frags[MAX_SKB_FRAGS]; 167 }; 168 169 struct tls_offload_context_tx { 170 struct crypto_aead *aead_send; 171 spinlock_t lock; /* protects records list */ 172 struct list_head records_list; 173 struct tls_record_info *open_record; 174 struct tls_record_info *retransmit_hint; 175 u64 hint_record_sn; 176 u64 unacked_record_sn; 177 178 struct scatterlist sg_tx_data[MAX_SKB_FRAGS]; 179 void (*sk_destruct)(struct sock *sk); 180 u8 driver_state[] __aligned(8); 181 /* The TLS layer reserves room for driver specific state 182 * Currently the belief is that there is not enough 183 * driver specific state to justify another layer of indirection 184 */ 185 #define TLS_DRIVER_STATE_SIZE_TX 16 186 }; 187 188 #define TLS_OFFLOAD_CONTEXT_SIZE_TX \ 189 (sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX) 190 191 enum tls_context_flags { 192 TLS_RX_SYNC_RUNNING = 0, 193 /* Unlike RX where resync is driven entirely by the core in TX only 194 * the driver knows when things went out of sync, so we need the flag 195 * to be atomic. 196 */ 197 TLS_TX_SYNC_SCHED = 1, 198 }; 199 200 struct cipher_context { 201 char *iv; 202 char *rec_seq; 203 }; 204 205 union tls_crypto_context { 206 struct tls_crypto_info info; 207 union { 208 struct tls12_crypto_info_aes_gcm_128 aes_gcm_128; 209 struct tls12_crypto_info_aes_gcm_256 aes_gcm_256; 210 }; 211 }; 212 213 struct tls_prot_info { 214 u16 version; 215 u16 cipher_type; 216 u16 prepend_size; 217 u16 tag_size; 218 u16 overhead_size; 219 u16 iv_size; 220 u16 salt_size; 221 u16 rec_seq_size; 222 u16 aad_size; 223 u16 tail_size; 224 }; 225 226 struct tls_context { 227 /* read-only cache line */ 228 struct tls_prot_info prot_info; 229 230 u8 tx_conf:3; 231 u8 rx_conf:3; 232 233 int (*push_pending_record)(struct sock *sk, int flags); 234 void (*sk_write_space)(struct sock *sk); 235 236 void *priv_ctx_tx; 237 void *priv_ctx_rx; 238 239 struct net_device *netdev; 240 241 /* rw cache line */ 242 struct cipher_context tx; 243 struct cipher_context rx; 244 245 struct scatterlist *partially_sent_record; 246 u16 partially_sent_offset; 247 248 bool in_tcp_sendpages; 249 bool pending_open_record_frags; 250 unsigned long flags; 251 252 /* cache cold stuff */ 253 struct proto *sk_proto; 254 255 void (*sk_destruct)(struct sock *sk); 256 257 union tls_crypto_context crypto_send; 258 union tls_crypto_context crypto_recv; 259 260 struct list_head list; 261 refcount_t refcount; 262 struct rcu_head rcu; 263 }; 264 265 enum tls_offload_ctx_dir { 266 TLS_OFFLOAD_CTX_DIR_RX, 267 TLS_OFFLOAD_CTX_DIR_TX, 268 }; 269 270 struct tlsdev_ops { 271 int (*tls_dev_add)(struct net_device *netdev, struct sock *sk, 272 enum tls_offload_ctx_dir direction, 273 struct tls_crypto_info *crypto_info, 274 u32 start_offload_tcp_sn); 275 void (*tls_dev_del)(struct net_device *netdev, 276 struct tls_context *ctx, 277 enum tls_offload_ctx_dir direction); 278 int (*tls_dev_resync)(struct net_device *netdev, 279 struct sock *sk, u32 seq, u8 *rcd_sn, 280 enum tls_offload_ctx_dir direction); 281 }; 282 283 enum tls_offload_sync_type { 284 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0, 285 TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1, 286 }; 287 288 #define TLS_DEVICE_RESYNC_NH_START_IVAL 2 289 #define TLS_DEVICE_RESYNC_NH_MAX_IVAL 128 290 291 struct tls_offload_context_rx { 292 /* sw must be the first member of tls_offload_context_rx */ 293 struct tls_sw_context_rx sw; 294 enum tls_offload_sync_type resync_type; 295 /* this member is set regardless of resync_type, to avoid branches */ 296 u8 resync_nh_reset:1; 297 /* CORE_NEXT_HINT-only member, but use the hole here */ 298 u8 resync_nh_do_now:1; 299 union { 300 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */ 301 struct { 302 atomic64_t resync_req; 303 }; 304 /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */ 305 struct { 306 u32 decrypted_failed; 307 u32 decrypted_tgt; 308 } resync_nh; 309 }; 310 u8 driver_state[] __aligned(8); 311 /* The TLS layer reserves room for driver specific state 312 * Currently the belief is that there is not enough 313 * driver specific state to justify another layer of indirection 314 */ 315 #define TLS_DRIVER_STATE_SIZE_RX 8 316 }; 317 318 #define TLS_OFFLOAD_CONTEXT_SIZE_RX \ 319 (sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX) 320 321 struct tls_context *tls_ctx_create(struct sock *sk); 322 void tls_ctx_free(struct sock *sk, struct tls_context *ctx); 323 void update_sk_prot(struct sock *sk, struct tls_context *ctx); 324 325 int wait_on_pending_writer(struct sock *sk, long *timeo); 326 int tls_sk_query(struct sock *sk, int optname, char __user *optval, 327 int __user *optlen); 328 int tls_sk_attach(struct sock *sk, int optname, char __user *optval, 329 unsigned int optlen); 330 331 int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx); 332 void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx); 333 void tls_sw_strparser_done(struct tls_context *tls_ctx); 334 int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); 335 int tls_sw_sendpage(struct sock *sk, struct page *page, 336 int offset, size_t size, int flags); 337 void tls_sw_cancel_work_tx(struct tls_context *tls_ctx); 338 void tls_sw_release_resources_tx(struct sock *sk); 339 void tls_sw_free_ctx_tx(struct tls_context *tls_ctx); 340 void tls_sw_free_resources_rx(struct sock *sk); 341 void tls_sw_release_resources_rx(struct sock *sk); 342 void tls_sw_free_ctx_rx(struct tls_context *tls_ctx); 343 int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 344 int nonblock, int flags, int *addr_len); 345 bool tls_sw_stream_read(const struct sock *sk); 346 ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, 347 struct pipe_inode_info *pipe, 348 size_t len, unsigned int flags); 349 350 int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); 351 int tls_device_sendpage(struct sock *sk, struct page *page, 352 int offset, size_t size, int flags); 353 int tls_tx_records(struct sock *sk, int flags); 354 355 struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, 356 u32 seq, u64 *p_record_sn); 357 358 static inline bool tls_record_is_start_marker(struct tls_record_info *rec) 359 { 360 return rec->len == 0; 361 } 362 363 static inline u32 tls_record_start_seq(struct tls_record_info *rec) 364 { 365 return rec->end_seq - rec->len; 366 } 367 368 int tls_push_sg(struct sock *sk, struct tls_context *ctx, 369 struct scatterlist *sg, u16 first_offset, 370 int flags); 371 int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 372 int flags); 373 bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx); 374 375 static inline struct tls_msg *tls_msg(struct sk_buff *skb) 376 { 377 return (struct tls_msg *)strp_msg(skb); 378 } 379 380 static inline bool tls_is_partially_sent_record(struct tls_context *ctx) 381 { 382 return !!ctx->partially_sent_record; 383 } 384 385 static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx) 386 { 387 return tls_ctx->pending_open_record_frags; 388 } 389 390 static inline bool is_tx_ready(struct tls_sw_context_tx *ctx) 391 { 392 struct tls_rec *rec; 393 394 rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); 395 if (!rec) 396 return false; 397 398 return READ_ONCE(rec->tx_ready); 399 } 400 401 static inline u16 tls_user_config(struct tls_context *ctx, bool tx) 402 { 403 u16 config = tx ? ctx->tx_conf : ctx->rx_conf; 404 405 switch (config) { 406 case TLS_BASE: 407 return TLS_CONF_BASE; 408 case TLS_SW: 409 return TLS_CONF_SW; 410 case TLS_HW: 411 return TLS_CONF_HW; 412 case TLS_HW_RECORD: 413 return TLS_CONF_HW_RECORD; 414 } 415 return 0; 416 } 417 418 struct sk_buff * 419 tls_validate_xmit_skb(struct sock *sk, struct net_device *dev, 420 struct sk_buff *skb); 421 422 static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk) 423 { 424 #ifdef CONFIG_SOCK_VALIDATE_XMIT 425 return sk_fullsock(sk) && 426 (smp_load_acquire(&sk->sk_validate_xmit_skb) == 427 &tls_validate_xmit_skb); 428 #else 429 return false; 430 #endif 431 } 432 433 static inline void tls_err_abort(struct sock *sk, int err) 434 { 435 sk->sk_err = err; 436 sk->sk_error_report(sk); 437 } 438 439 static inline bool tls_bigint_increment(unsigned char *seq, int len) 440 { 441 int i; 442 443 for (i = len - 1; i >= 0; i--) { 444 ++seq[i]; 445 if (seq[i] != 0) 446 break; 447 } 448 449 return (i == -1); 450 } 451 452 static inline struct tls_context *tls_get_ctx(const struct sock *sk) 453 { 454 struct inet_connection_sock *icsk = inet_csk(sk); 455 456 /* Use RCU on icsk_ulp_data only for sock diag code, 457 * TLS data path doesn't need rcu_dereference(). 458 */ 459 return (__force void *)icsk->icsk_ulp_data; 460 } 461 462 static inline void tls_advance_record_sn(struct sock *sk, 463 struct tls_prot_info *prot, 464 struct cipher_context *ctx) 465 { 466 if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size)) 467 tls_err_abort(sk, EBADMSG); 468 469 if (prot->version != TLS_1_3_VERSION) 470 tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 471 prot->iv_size); 472 } 473 474 static inline void tls_fill_prepend(struct tls_context *ctx, 475 char *buf, 476 size_t plaintext_len, 477 unsigned char record_type, 478 int version) 479 { 480 struct tls_prot_info *prot = &ctx->prot_info; 481 size_t pkt_len, iv_size = prot->iv_size; 482 483 pkt_len = plaintext_len + prot->tag_size; 484 if (version != TLS_1_3_VERSION) { 485 pkt_len += iv_size; 486 487 memcpy(buf + TLS_NONCE_OFFSET, 488 ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size); 489 } 490 491 /* we cover nonce explicit here as well, so buf should be of 492 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE 493 */ 494 buf[0] = version == TLS_1_3_VERSION ? 495 TLS_RECORD_TYPE_DATA : record_type; 496 /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */ 497 buf[1] = TLS_1_2_VERSION_MINOR; 498 buf[2] = TLS_1_2_VERSION_MAJOR; 499 /* we can use IV for nonce explicit according to spec */ 500 buf[3] = pkt_len >> 8; 501 buf[4] = pkt_len & 0xFF; 502 } 503 504 static inline void tls_make_aad(char *buf, 505 size_t size, 506 char *record_sequence, 507 int record_sequence_size, 508 unsigned char record_type, 509 int version) 510 { 511 if (version != TLS_1_3_VERSION) { 512 memcpy(buf, record_sequence, record_sequence_size); 513 buf += 8; 514 } else { 515 size += TLS_CIPHER_AES_GCM_128_TAG_SIZE; 516 } 517 518 buf[0] = version == TLS_1_3_VERSION ? 519 TLS_RECORD_TYPE_DATA : record_type; 520 buf[1] = TLS_1_2_VERSION_MAJOR; 521 buf[2] = TLS_1_2_VERSION_MINOR; 522 buf[3] = size >> 8; 523 buf[4] = size & 0xFF; 524 } 525 526 static inline void xor_iv_with_seq(int version, char *iv, char *seq) 527 { 528 int i; 529 530 if (version == TLS_1_3_VERSION) { 531 for (i = 0; i < 8; i++) 532 iv[i + 4] ^= seq[i]; 533 } 534 } 535 536 537 static inline struct tls_sw_context_rx *tls_sw_ctx_rx( 538 const struct tls_context *tls_ctx) 539 { 540 return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx; 541 } 542 543 static inline struct tls_sw_context_tx *tls_sw_ctx_tx( 544 const struct tls_context *tls_ctx) 545 { 546 return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx; 547 } 548 549 static inline struct tls_offload_context_tx * 550 tls_offload_ctx_tx(const struct tls_context *tls_ctx) 551 { 552 return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx; 553 } 554 555 static inline bool tls_sw_has_ctx_tx(const struct sock *sk) 556 { 557 struct tls_context *ctx = tls_get_ctx(sk); 558 559 if (!ctx) 560 return false; 561 return !!tls_sw_ctx_tx(ctx); 562 } 563 564 void tls_sw_write_space(struct sock *sk, struct tls_context *ctx); 565 void tls_device_write_space(struct sock *sk, struct tls_context *ctx); 566 567 static inline struct tls_offload_context_rx * 568 tls_offload_ctx_rx(const struct tls_context *tls_ctx) 569 { 570 return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx; 571 } 572 573 #if IS_ENABLED(CONFIG_TLS_DEVICE) 574 static inline void *__tls_driver_ctx(struct tls_context *tls_ctx, 575 enum tls_offload_ctx_dir direction) 576 { 577 if (direction == TLS_OFFLOAD_CTX_DIR_TX) 578 return tls_offload_ctx_tx(tls_ctx)->driver_state; 579 else 580 return tls_offload_ctx_rx(tls_ctx)->driver_state; 581 } 582 583 static inline void * 584 tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction) 585 { 586 return __tls_driver_ctx(tls_get_ctx(sk), direction); 587 } 588 #endif 589 590 /* The TLS context is valid until sk_destruct is called */ 591 static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq) 592 { 593 struct tls_context *tls_ctx = tls_get_ctx(sk); 594 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); 595 596 atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | 1); 597 } 598 599 static inline void 600 tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type) 601 { 602 struct tls_context *tls_ctx = tls_get_ctx(sk); 603 604 tls_offload_ctx_rx(tls_ctx)->resync_type = type; 605 } 606 607 /* Driver's seq tracking has to be disabled until resync succeeded */ 608 static inline bool tls_offload_tx_resync_pending(struct sock *sk) 609 { 610 struct tls_context *tls_ctx = tls_get_ctx(sk); 611 bool ret; 612 613 ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags); 614 smp_mb__after_atomic(); 615 return ret; 616 } 617 618 int __net_init tls_proc_init(struct net *net); 619 void __net_exit tls_proc_fini(struct net *net); 620 621 int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 622 unsigned char *record_type); 623 int decrypt_skb(struct sock *sk, struct sk_buff *skb, 624 struct scatterlist *sgout); 625 struct sk_buff *tls_encrypt_skb(struct sk_buff *skb); 626 627 struct sk_buff *tls_validate_xmit_skb(struct sock *sk, 628 struct net_device *dev, 629 struct sk_buff *skb); 630 631 int tls_sw_fallback_init(struct sock *sk, 632 struct tls_offload_context_tx *offload_ctx, 633 struct tls_crypto_info *crypto_info); 634 635 #ifdef CONFIG_TLS_DEVICE 636 void tls_device_init(void); 637 void tls_device_cleanup(void); 638 int tls_set_device_offload(struct sock *sk, struct tls_context *ctx); 639 void tls_device_free_resources_tx(struct sock *sk); 640 int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx); 641 void tls_device_offload_cleanup_rx(struct sock *sk); 642 void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq); 643 void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq); 644 int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, 645 struct sk_buff *skb, struct strp_msg *rxm); 646 #else 647 static inline void tls_device_init(void) {} 648 static inline void tls_device_cleanup(void) {} 649 650 static inline int 651 tls_set_device_offload(struct sock *sk, struct tls_context *ctx) 652 { 653 return -EOPNOTSUPP; 654 } 655 656 static inline void tls_device_free_resources_tx(struct sock *sk) {} 657 658 static inline int 659 tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) 660 { 661 return -EOPNOTSUPP; 662 } 663 664 static inline void tls_device_offload_cleanup_rx(struct sock *sk) {} 665 static inline void 666 tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {} 667 668 static inline int 669 tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, 670 struct sk_buff *skb, struct strp_msg *rxm) 671 { 672 return 0; 673 } 674 #endif 675 #endif /* _TLS_OFFLOAD_H */ 676