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/mutex.h> 44 #include <linux/netdevice.h> 45 #include <linux/rcupdate.h> 46 47 #include <net/net_namespace.h> 48 #include <net/tcp.h> 49 #include <net/strparser.h> 50 #include <crypto/aead.h> 51 #include <uapi/linux/tls.h> 52 53 54 /* Maximum data size carried in a TLS record */ 55 #define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14) 56 57 #define TLS_HEADER_SIZE 5 58 #define TLS_NONCE_OFFSET TLS_HEADER_SIZE 59 60 #define TLS_CRYPTO_INFO_READY(info) ((info)->cipher_type) 61 62 #define TLS_RECORD_TYPE_DATA 0x17 63 64 #define TLS_AAD_SPACE_SIZE 13 65 66 #define MAX_IV_SIZE 16 67 #define TLS_MAX_REC_SEQ_SIZE 8 68 69 /* For AES-CCM, the full 16-bytes of IV is made of '4' fields of given sizes. 70 * 71 * IV[16] = b0[1] || implicit nonce[4] || explicit nonce[8] || length[3] 72 * 73 * The field 'length' is encoded in field 'b0' as '(length width - 1)'. 74 * Hence b0 contains (3 - 1) = 2. 75 */ 76 #define TLS_AES_CCM_IV_B0_BYTE 2 77 78 #define __TLS_INC_STATS(net, field) \ 79 __SNMP_INC_STATS((net)->mib.tls_statistics, field) 80 #define TLS_INC_STATS(net, field) \ 81 SNMP_INC_STATS((net)->mib.tls_statistics, field) 82 #define __TLS_DEC_STATS(net, field) \ 83 __SNMP_DEC_STATS((net)->mib.tls_statistics, field) 84 #define TLS_DEC_STATS(net, field) \ 85 SNMP_DEC_STATS((net)->mib.tls_statistics, field) 86 87 enum { 88 TLS_BASE, 89 TLS_SW, 90 TLS_HW, 91 TLS_HW_RECORD, 92 TLS_NUM_CONFIG, 93 }; 94 95 /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages 96 * allocated or mapped for each TLS record. After encryption, the records are 97 * stores in a linked list. 98 */ 99 struct tls_rec { 100 struct list_head list; 101 int tx_ready; 102 int tx_flags; 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 /* protect crypto_wait with encrypt_pending */ 139 spinlock_t encrypt_compl_lock; 140 int async_notify; 141 u8 async_capable:1; 142 143 #define BIT_TX_SCHEDULED 0 144 #define BIT_TX_CLOSING 1 145 unsigned long tx_bitmask; 146 }; 147 148 struct tls_sw_context_rx { 149 struct crypto_aead *aead_recv; 150 struct crypto_wait async_wait; 151 struct strparser strp; 152 struct sk_buff_head rx_list; /* list of decrypted 'data' records */ 153 void (*saved_data_ready)(struct sock *sk); 154 155 struct sk_buff *recv_pkt; 156 u8 control; 157 u8 async_capable:1; 158 u8 decrypted:1; 159 atomic_t decrypt_pending; 160 /* protect crypto_wait with decrypt_pending*/ 161 spinlock_t decrypt_compl_lock; 162 bool async_notify; 163 }; 164 165 struct tls_record_info { 166 struct list_head list; 167 u32 end_seq; 168 int len; 169 int num_frags; 170 skb_frag_t frags[MAX_SKB_FRAGS]; 171 }; 172 173 struct tls_offload_context_tx { 174 struct crypto_aead *aead_send; 175 spinlock_t lock; /* protects records list */ 176 struct list_head records_list; 177 struct tls_record_info *open_record; 178 struct tls_record_info *retransmit_hint; 179 u64 hint_record_sn; 180 u64 unacked_record_sn; 181 182 struct scatterlist sg_tx_data[MAX_SKB_FRAGS]; 183 void (*sk_destruct)(struct sock *sk); 184 u8 driver_state[] __aligned(8); 185 /* The TLS layer reserves room for driver specific state 186 * Currently the belief is that there is not enough 187 * driver specific state to justify another layer of indirection 188 */ 189 #define TLS_DRIVER_STATE_SIZE_TX 16 190 }; 191 192 #define TLS_OFFLOAD_CONTEXT_SIZE_TX \ 193 (sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX) 194 195 enum tls_context_flags { 196 TLS_RX_SYNC_RUNNING = 0, 197 /* Unlike RX where resync is driven entirely by the core in TX only 198 * the driver knows when things went out of sync, so we need the flag 199 * to be atomic. 200 */ 201 TLS_TX_SYNC_SCHED = 1, 202 }; 203 204 struct cipher_context { 205 char *iv; 206 char *rec_seq; 207 }; 208 209 union tls_crypto_context { 210 struct tls_crypto_info info; 211 union { 212 struct tls12_crypto_info_aes_gcm_128 aes_gcm_128; 213 struct tls12_crypto_info_aes_gcm_256 aes_gcm_256; 214 }; 215 }; 216 217 struct tls_prot_info { 218 u16 version; 219 u16 cipher_type; 220 u16 prepend_size; 221 u16 tag_size; 222 u16 overhead_size; 223 u16 iv_size; 224 u16 salt_size; 225 u16 rec_seq_size; 226 u16 aad_size; 227 u16 tail_size; 228 }; 229 230 struct tls_context { 231 /* read-only cache line */ 232 struct tls_prot_info prot_info; 233 234 u8 tx_conf:3; 235 u8 rx_conf:3; 236 237 int (*push_pending_record)(struct sock *sk, int flags); 238 void (*sk_write_space)(struct sock *sk); 239 240 void *priv_ctx_tx; 241 void *priv_ctx_rx; 242 243 struct net_device *netdev; 244 245 /* rw cache line */ 246 struct cipher_context tx; 247 struct cipher_context rx; 248 249 struct scatterlist *partially_sent_record; 250 u16 partially_sent_offset; 251 252 bool in_tcp_sendpages; 253 bool pending_open_record_frags; 254 255 struct mutex tx_lock; /* protects partially_sent_* fields and 256 * per-type TX fields 257 */ 258 unsigned long flags; 259 260 /* cache cold stuff */ 261 struct proto *sk_proto; 262 263 void (*sk_destruct)(struct sock *sk); 264 265 union tls_crypto_context crypto_send; 266 union tls_crypto_context crypto_recv; 267 268 struct list_head list; 269 refcount_t refcount; 270 struct rcu_head rcu; 271 }; 272 273 enum tls_offload_ctx_dir { 274 TLS_OFFLOAD_CTX_DIR_RX, 275 TLS_OFFLOAD_CTX_DIR_TX, 276 }; 277 278 struct tlsdev_ops { 279 int (*tls_dev_add)(struct net_device *netdev, struct sock *sk, 280 enum tls_offload_ctx_dir direction, 281 struct tls_crypto_info *crypto_info, 282 u32 start_offload_tcp_sn); 283 void (*tls_dev_del)(struct net_device *netdev, 284 struct tls_context *ctx, 285 enum tls_offload_ctx_dir direction); 286 int (*tls_dev_resync)(struct net_device *netdev, 287 struct sock *sk, u32 seq, u8 *rcd_sn, 288 enum tls_offload_ctx_dir direction); 289 }; 290 291 enum tls_offload_sync_type { 292 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0, 293 TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1, 294 }; 295 296 #define TLS_DEVICE_RESYNC_NH_START_IVAL 2 297 #define TLS_DEVICE_RESYNC_NH_MAX_IVAL 128 298 299 struct tls_offload_context_rx { 300 /* sw must be the first member of tls_offload_context_rx */ 301 struct tls_sw_context_rx sw; 302 enum tls_offload_sync_type resync_type; 303 /* this member is set regardless of resync_type, to avoid branches */ 304 u8 resync_nh_reset:1; 305 /* CORE_NEXT_HINT-only member, but use the hole here */ 306 u8 resync_nh_do_now:1; 307 union { 308 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */ 309 struct { 310 atomic64_t resync_req; 311 }; 312 /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */ 313 struct { 314 u32 decrypted_failed; 315 u32 decrypted_tgt; 316 } resync_nh; 317 }; 318 u8 driver_state[] __aligned(8); 319 /* The TLS layer reserves room for driver specific state 320 * Currently the belief is that there is not enough 321 * driver specific state to justify another layer of indirection 322 */ 323 #define TLS_DRIVER_STATE_SIZE_RX 8 324 }; 325 326 #define TLS_OFFLOAD_CONTEXT_SIZE_RX \ 327 (sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX) 328 329 struct tls_context *tls_ctx_create(struct sock *sk); 330 void tls_ctx_free(struct sock *sk, struct tls_context *ctx); 331 void update_sk_prot(struct sock *sk, struct tls_context *ctx); 332 333 int wait_on_pending_writer(struct sock *sk, long *timeo); 334 int tls_sk_query(struct sock *sk, int optname, char __user *optval, 335 int __user *optlen); 336 int tls_sk_attach(struct sock *sk, int optname, char __user *optval, 337 unsigned int optlen); 338 339 int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx); 340 void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx); 341 void tls_sw_strparser_done(struct tls_context *tls_ctx); 342 int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); 343 int tls_sw_sendpage_locked(struct sock *sk, struct page *page, 344 int offset, size_t size, int flags); 345 int tls_sw_sendpage(struct sock *sk, struct page *page, 346 int offset, size_t size, int flags); 347 void tls_sw_cancel_work_tx(struct tls_context *tls_ctx); 348 void tls_sw_release_resources_tx(struct sock *sk); 349 void tls_sw_free_ctx_tx(struct tls_context *tls_ctx); 350 void tls_sw_free_resources_rx(struct sock *sk); 351 void tls_sw_release_resources_rx(struct sock *sk); 352 void tls_sw_free_ctx_rx(struct tls_context *tls_ctx); 353 int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 354 int nonblock, int flags, int *addr_len); 355 bool tls_sw_stream_read(const struct sock *sk); 356 ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, 357 struct pipe_inode_info *pipe, 358 size_t len, unsigned int flags); 359 360 int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); 361 int tls_device_sendpage(struct sock *sk, struct page *page, 362 int offset, size_t size, int flags); 363 int tls_tx_records(struct sock *sk, int flags); 364 365 struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, 366 u32 seq, u64 *p_record_sn); 367 368 static inline bool tls_record_is_start_marker(struct tls_record_info *rec) 369 { 370 return rec->len == 0; 371 } 372 373 static inline u32 tls_record_start_seq(struct tls_record_info *rec) 374 { 375 return rec->end_seq - rec->len; 376 } 377 378 int tls_push_sg(struct sock *sk, struct tls_context *ctx, 379 struct scatterlist *sg, u16 first_offset, 380 int flags); 381 int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 382 int flags); 383 void tls_free_partial_record(struct sock *sk, struct tls_context *ctx); 384 385 static inline struct tls_msg *tls_msg(struct sk_buff *skb) 386 { 387 return (struct tls_msg *)strp_msg(skb); 388 } 389 390 static inline bool tls_is_partially_sent_record(struct tls_context *ctx) 391 { 392 return !!ctx->partially_sent_record; 393 } 394 395 static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx) 396 { 397 return tls_ctx->pending_open_record_frags; 398 } 399 400 static inline bool is_tx_ready(struct tls_sw_context_tx *ctx) 401 { 402 struct tls_rec *rec; 403 404 rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); 405 if (!rec) 406 return false; 407 408 return READ_ONCE(rec->tx_ready); 409 } 410 411 static inline u16 tls_user_config(struct tls_context *ctx, bool tx) 412 { 413 u16 config = tx ? ctx->tx_conf : ctx->rx_conf; 414 415 switch (config) { 416 case TLS_BASE: 417 return TLS_CONF_BASE; 418 case TLS_SW: 419 return TLS_CONF_SW; 420 case TLS_HW: 421 return TLS_CONF_HW; 422 case TLS_HW_RECORD: 423 return TLS_CONF_HW_RECORD; 424 } 425 return 0; 426 } 427 428 struct sk_buff * 429 tls_validate_xmit_skb(struct sock *sk, struct net_device *dev, 430 struct sk_buff *skb); 431 432 static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk) 433 { 434 #ifdef CONFIG_SOCK_VALIDATE_XMIT 435 return sk_fullsock(sk) && 436 (smp_load_acquire(&sk->sk_validate_xmit_skb) == 437 &tls_validate_xmit_skb); 438 #else 439 return false; 440 #endif 441 } 442 443 static inline void tls_err_abort(struct sock *sk, int err) 444 { 445 sk->sk_err = err; 446 sk->sk_error_report(sk); 447 } 448 449 static inline bool tls_bigint_increment(unsigned char *seq, int len) 450 { 451 int i; 452 453 for (i = len - 1; i >= 0; i--) { 454 ++seq[i]; 455 if (seq[i] != 0) 456 break; 457 } 458 459 return (i == -1); 460 } 461 462 static inline struct tls_context *tls_get_ctx(const struct sock *sk) 463 { 464 struct inet_connection_sock *icsk = inet_csk(sk); 465 466 /* Use RCU on icsk_ulp_data only for sock diag code, 467 * TLS data path doesn't need rcu_dereference(). 468 */ 469 return (__force void *)icsk->icsk_ulp_data; 470 } 471 472 static inline void tls_advance_record_sn(struct sock *sk, 473 struct tls_prot_info *prot, 474 struct cipher_context *ctx) 475 { 476 if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size)) 477 tls_err_abort(sk, EBADMSG); 478 479 if (prot->version != TLS_1_3_VERSION) 480 tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 481 prot->iv_size); 482 } 483 484 static inline void tls_fill_prepend(struct tls_context *ctx, 485 char *buf, 486 size_t plaintext_len, 487 unsigned char record_type, 488 int version) 489 { 490 struct tls_prot_info *prot = &ctx->prot_info; 491 size_t pkt_len, iv_size = prot->iv_size; 492 493 pkt_len = plaintext_len + prot->tag_size; 494 if (version != TLS_1_3_VERSION) { 495 pkt_len += iv_size; 496 497 memcpy(buf + TLS_NONCE_OFFSET, 498 ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size); 499 } 500 501 /* we cover nonce explicit here as well, so buf should be of 502 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE 503 */ 504 buf[0] = version == TLS_1_3_VERSION ? 505 TLS_RECORD_TYPE_DATA : record_type; 506 /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */ 507 buf[1] = TLS_1_2_VERSION_MINOR; 508 buf[2] = TLS_1_2_VERSION_MAJOR; 509 /* we can use IV for nonce explicit according to spec */ 510 buf[3] = pkt_len >> 8; 511 buf[4] = pkt_len & 0xFF; 512 } 513 514 static inline void tls_make_aad(char *buf, 515 size_t size, 516 char *record_sequence, 517 int record_sequence_size, 518 unsigned char record_type, 519 int version) 520 { 521 if (version != TLS_1_3_VERSION) { 522 memcpy(buf, record_sequence, record_sequence_size); 523 buf += 8; 524 } else { 525 size += TLS_CIPHER_AES_GCM_128_TAG_SIZE; 526 } 527 528 buf[0] = version == TLS_1_3_VERSION ? 529 TLS_RECORD_TYPE_DATA : record_type; 530 buf[1] = TLS_1_2_VERSION_MAJOR; 531 buf[2] = TLS_1_2_VERSION_MINOR; 532 buf[3] = size >> 8; 533 buf[4] = size & 0xFF; 534 } 535 536 static inline void xor_iv_with_seq(int version, char *iv, char *seq) 537 { 538 int i; 539 540 if (version == TLS_1_3_VERSION) { 541 for (i = 0; i < 8; i++) 542 iv[i + 4] ^= seq[i]; 543 } 544 } 545 546 547 static inline struct tls_sw_context_rx *tls_sw_ctx_rx( 548 const struct tls_context *tls_ctx) 549 { 550 return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx; 551 } 552 553 static inline struct tls_sw_context_tx *tls_sw_ctx_tx( 554 const struct tls_context *tls_ctx) 555 { 556 return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx; 557 } 558 559 static inline struct tls_offload_context_tx * 560 tls_offload_ctx_tx(const struct tls_context *tls_ctx) 561 { 562 return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx; 563 } 564 565 static inline bool tls_sw_has_ctx_tx(const struct sock *sk) 566 { 567 struct tls_context *ctx = tls_get_ctx(sk); 568 569 if (!ctx) 570 return false; 571 return !!tls_sw_ctx_tx(ctx); 572 } 573 574 void tls_sw_write_space(struct sock *sk, struct tls_context *ctx); 575 void tls_device_write_space(struct sock *sk, struct tls_context *ctx); 576 577 static inline struct tls_offload_context_rx * 578 tls_offload_ctx_rx(const struct tls_context *tls_ctx) 579 { 580 return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx; 581 } 582 583 #if IS_ENABLED(CONFIG_TLS_DEVICE) 584 static inline void *__tls_driver_ctx(struct tls_context *tls_ctx, 585 enum tls_offload_ctx_dir direction) 586 { 587 if (direction == TLS_OFFLOAD_CTX_DIR_TX) 588 return tls_offload_ctx_tx(tls_ctx)->driver_state; 589 else 590 return tls_offload_ctx_rx(tls_ctx)->driver_state; 591 } 592 593 static inline void * 594 tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction) 595 { 596 return __tls_driver_ctx(tls_get_ctx(sk), direction); 597 } 598 #endif 599 600 /* The TLS context is valid until sk_destruct is called */ 601 static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq) 602 { 603 struct tls_context *tls_ctx = tls_get_ctx(sk); 604 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); 605 606 atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | 1); 607 } 608 609 static inline void 610 tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type) 611 { 612 struct tls_context *tls_ctx = tls_get_ctx(sk); 613 614 tls_offload_ctx_rx(tls_ctx)->resync_type = type; 615 } 616 617 /* Driver's seq tracking has to be disabled until resync succeeded */ 618 static inline bool tls_offload_tx_resync_pending(struct sock *sk) 619 { 620 struct tls_context *tls_ctx = tls_get_ctx(sk); 621 bool ret; 622 623 ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags); 624 smp_mb__after_atomic(); 625 return ret; 626 } 627 628 int __net_init tls_proc_init(struct net *net); 629 void __net_exit tls_proc_fini(struct net *net); 630 631 int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 632 unsigned char *record_type); 633 int decrypt_skb(struct sock *sk, struct sk_buff *skb, 634 struct scatterlist *sgout); 635 struct sk_buff *tls_encrypt_skb(struct sk_buff *skb); 636 637 struct sk_buff *tls_validate_xmit_skb(struct sock *sk, 638 struct net_device *dev, 639 struct sk_buff *skb); 640 641 int tls_sw_fallback_init(struct sock *sk, 642 struct tls_offload_context_tx *offload_ctx, 643 struct tls_crypto_info *crypto_info); 644 645 #ifdef CONFIG_TLS_DEVICE 646 void tls_device_init(void); 647 void tls_device_cleanup(void); 648 void tls_device_sk_destruct(struct sock *sk); 649 int tls_set_device_offload(struct sock *sk, struct tls_context *ctx); 650 void tls_device_free_resources_tx(struct sock *sk); 651 int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx); 652 void tls_device_offload_cleanup_rx(struct sock *sk); 653 void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq); 654 void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq); 655 int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, 656 struct sk_buff *skb, struct strp_msg *rxm); 657 658 static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk) 659 { 660 if (!sk_fullsock(sk) || 661 smp_load_acquire(&sk->sk_destruct) != tls_device_sk_destruct) 662 return false; 663 return tls_get_ctx(sk)->rx_conf == TLS_HW; 664 } 665 #else 666 static inline void tls_device_init(void) {} 667 static inline void tls_device_cleanup(void) {} 668 669 static inline int 670 tls_set_device_offload(struct sock *sk, struct tls_context *ctx) 671 { 672 return -EOPNOTSUPP; 673 } 674 675 static inline void tls_device_free_resources_tx(struct sock *sk) {} 676 677 static inline int 678 tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) 679 { 680 return -EOPNOTSUPP; 681 } 682 683 static inline void tls_device_offload_cleanup_rx(struct sock *sk) {} 684 static inline void 685 tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {} 686 687 static inline int 688 tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, 689 struct sk_buff *skb, struct strp_msg *rxm) 690 { 691 return 0; 692 } 693 #endif 694 #endif /* _TLS_OFFLOAD_H */ 695