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 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC = 2, 295 }; 296 297 #define TLS_DEVICE_RESYNC_NH_START_IVAL 2 298 #define TLS_DEVICE_RESYNC_NH_MAX_IVAL 128 299 300 #define TLS_DEVICE_RESYNC_ASYNC_LOGMAX 13 301 struct tls_offload_resync_async { 302 atomic64_t req; 303 u16 loglen; 304 u16 rcd_delta; 305 u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX]; 306 }; 307 308 struct tls_offload_context_rx { 309 /* sw must be the first member of tls_offload_context_rx */ 310 struct tls_sw_context_rx sw; 311 enum tls_offload_sync_type resync_type; 312 /* this member is set regardless of resync_type, to avoid branches */ 313 u8 resync_nh_reset:1; 314 /* CORE_NEXT_HINT-only member, but use the hole here */ 315 u8 resync_nh_do_now:1; 316 union { 317 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */ 318 struct { 319 atomic64_t resync_req; 320 }; 321 /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */ 322 struct { 323 u32 decrypted_failed; 324 u32 decrypted_tgt; 325 } resync_nh; 326 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC */ 327 struct { 328 struct tls_offload_resync_async *resync_async; 329 }; 330 }; 331 u8 driver_state[] __aligned(8); 332 /* The TLS layer reserves room for driver specific state 333 * Currently the belief is that there is not enough 334 * driver specific state to justify another layer of indirection 335 */ 336 #define TLS_DRIVER_STATE_SIZE_RX 8 337 }; 338 339 #define TLS_OFFLOAD_CONTEXT_SIZE_RX \ 340 (sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX) 341 342 struct tls_context *tls_ctx_create(struct sock *sk); 343 void tls_ctx_free(struct sock *sk, struct tls_context *ctx); 344 void update_sk_prot(struct sock *sk, struct tls_context *ctx); 345 346 int wait_on_pending_writer(struct sock *sk, long *timeo); 347 int tls_sk_query(struct sock *sk, int optname, char __user *optval, 348 int __user *optlen); 349 int tls_sk_attach(struct sock *sk, int optname, char __user *optval, 350 unsigned int optlen); 351 352 int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx); 353 void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx); 354 void tls_sw_strparser_done(struct tls_context *tls_ctx); 355 int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); 356 int tls_sw_sendpage_locked(struct sock *sk, struct page *page, 357 int offset, size_t size, int flags); 358 int tls_sw_sendpage(struct sock *sk, struct page *page, 359 int offset, size_t size, int flags); 360 void tls_sw_cancel_work_tx(struct tls_context *tls_ctx); 361 void tls_sw_release_resources_tx(struct sock *sk); 362 void tls_sw_free_ctx_tx(struct tls_context *tls_ctx); 363 void tls_sw_free_resources_rx(struct sock *sk); 364 void tls_sw_release_resources_rx(struct sock *sk); 365 void tls_sw_free_ctx_rx(struct tls_context *tls_ctx); 366 int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 367 int nonblock, int flags, int *addr_len); 368 bool tls_sw_stream_read(const struct sock *sk); 369 ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, 370 struct pipe_inode_info *pipe, 371 size_t len, unsigned int flags); 372 373 int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); 374 int tls_device_sendpage(struct sock *sk, struct page *page, 375 int offset, size_t size, int flags); 376 int tls_tx_records(struct sock *sk, int flags); 377 378 struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, 379 u32 seq, u64 *p_record_sn); 380 381 static inline bool tls_record_is_start_marker(struct tls_record_info *rec) 382 { 383 return rec->len == 0; 384 } 385 386 static inline u32 tls_record_start_seq(struct tls_record_info *rec) 387 { 388 return rec->end_seq - rec->len; 389 } 390 391 int tls_push_sg(struct sock *sk, struct tls_context *ctx, 392 struct scatterlist *sg, u16 first_offset, 393 int flags); 394 int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 395 int flags); 396 void tls_free_partial_record(struct sock *sk, struct tls_context *ctx); 397 398 static inline struct tls_msg *tls_msg(struct sk_buff *skb) 399 { 400 return (struct tls_msg *)strp_msg(skb); 401 } 402 403 static inline bool tls_is_partially_sent_record(struct tls_context *ctx) 404 { 405 return !!ctx->partially_sent_record; 406 } 407 408 static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx) 409 { 410 return tls_ctx->pending_open_record_frags; 411 } 412 413 static inline bool is_tx_ready(struct tls_sw_context_tx *ctx) 414 { 415 struct tls_rec *rec; 416 417 rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); 418 if (!rec) 419 return false; 420 421 return READ_ONCE(rec->tx_ready); 422 } 423 424 static inline u16 tls_user_config(struct tls_context *ctx, bool tx) 425 { 426 u16 config = tx ? ctx->tx_conf : ctx->rx_conf; 427 428 switch (config) { 429 case TLS_BASE: 430 return TLS_CONF_BASE; 431 case TLS_SW: 432 return TLS_CONF_SW; 433 case TLS_HW: 434 return TLS_CONF_HW; 435 case TLS_HW_RECORD: 436 return TLS_CONF_HW_RECORD; 437 } 438 return 0; 439 } 440 441 struct sk_buff * 442 tls_validate_xmit_skb(struct sock *sk, struct net_device *dev, 443 struct sk_buff *skb); 444 445 static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk) 446 { 447 #ifdef CONFIG_SOCK_VALIDATE_XMIT 448 return sk_fullsock(sk) && 449 (smp_load_acquire(&sk->sk_validate_xmit_skb) == 450 &tls_validate_xmit_skb); 451 #else 452 return false; 453 #endif 454 } 455 456 static inline void tls_err_abort(struct sock *sk, int err) 457 { 458 sk->sk_err = err; 459 sk->sk_error_report(sk); 460 } 461 462 static inline bool tls_bigint_increment(unsigned char *seq, int len) 463 { 464 int i; 465 466 for (i = len - 1; i >= 0; i--) { 467 ++seq[i]; 468 if (seq[i] != 0) 469 break; 470 } 471 472 return (i == -1); 473 } 474 475 static inline void tls_bigint_subtract(unsigned char *seq, int n) 476 { 477 u64 rcd_sn; 478 __be64 *p; 479 480 BUILD_BUG_ON(TLS_MAX_REC_SEQ_SIZE != 8); 481 482 p = (__be64 *)seq; 483 rcd_sn = be64_to_cpu(*p); 484 *p = cpu_to_be64(rcd_sn - n); 485 } 486 487 static inline struct tls_context *tls_get_ctx(const struct sock *sk) 488 { 489 struct inet_connection_sock *icsk = inet_csk(sk); 490 491 /* Use RCU on icsk_ulp_data only for sock diag code, 492 * TLS data path doesn't need rcu_dereference(). 493 */ 494 return (__force void *)icsk->icsk_ulp_data; 495 } 496 497 static inline void tls_advance_record_sn(struct sock *sk, 498 struct tls_prot_info *prot, 499 struct cipher_context *ctx) 500 { 501 if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size)) 502 tls_err_abort(sk, EBADMSG); 503 504 if (prot->version != TLS_1_3_VERSION) 505 tls_bigint_increment(ctx->iv + prot->salt_size, 506 prot->iv_size); 507 } 508 509 static inline void tls_fill_prepend(struct tls_context *ctx, 510 char *buf, 511 size_t plaintext_len, 512 unsigned char record_type) 513 { 514 struct tls_prot_info *prot = &ctx->prot_info; 515 size_t pkt_len, iv_size = prot->iv_size; 516 517 pkt_len = plaintext_len + prot->tag_size; 518 if (prot->version != TLS_1_3_VERSION) { 519 pkt_len += iv_size; 520 521 memcpy(buf + TLS_NONCE_OFFSET, 522 ctx->tx.iv + prot->salt_size, iv_size); 523 } 524 525 /* we cover nonce explicit here as well, so buf should be of 526 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE 527 */ 528 buf[0] = prot->version == TLS_1_3_VERSION ? 529 TLS_RECORD_TYPE_DATA : record_type; 530 /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */ 531 buf[1] = TLS_1_2_VERSION_MINOR; 532 buf[2] = TLS_1_2_VERSION_MAJOR; 533 /* we can use IV for nonce explicit according to spec */ 534 buf[3] = pkt_len >> 8; 535 buf[4] = pkt_len & 0xFF; 536 } 537 538 static inline void tls_make_aad(char *buf, 539 size_t size, 540 char *record_sequence, 541 unsigned char record_type, 542 struct tls_prot_info *prot) 543 { 544 if (prot->version != TLS_1_3_VERSION) { 545 memcpy(buf, record_sequence, prot->rec_seq_size); 546 buf += 8; 547 } else { 548 size += prot->tag_size; 549 } 550 551 buf[0] = prot->version == TLS_1_3_VERSION ? 552 TLS_RECORD_TYPE_DATA : record_type; 553 buf[1] = TLS_1_2_VERSION_MAJOR; 554 buf[2] = TLS_1_2_VERSION_MINOR; 555 buf[3] = size >> 8; 556 buf[4] = size & 0xFF; 557 } 558 559 static inline void xor_iv_with_seq(struct tls_prot_info *prot, char *iv, char *seq) 560 { 561 int i; 562 563 if (prot->version == TLS_1_3_VERSION) { 564 for (i = 0; i < 8; i++) 565 iv[i + 4] ^= seq[i]; 566 } 567 } 568 569 570 static inline struct tls_sw_context_rx *tls_sw_ctx_rx( 571 const struct tls_context *tls_ctx) 572 { 573 return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx; 574 } 575 576 static inline struct tls_sw_context_tx *tls_sw_ctx_tx( 577 const struct tls_context *tls_ctx) 578 { 579 return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx; 580 } 581 582 static inline struct tls_offload_context_tx * 583 tls_offload_ctx_tx(const struct tls_context *tls_ctx) 584 { 585 return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx; 586 } 587 588 static inline bool tls_sw_has_ctx_tx(const struct sock *sk) 589 { 590 struct tls_context *ctx = tls_get_ctx(sk); 591 592 if (!ctx) 593 return false; 594 return !!tls_sw_ctx_tx(ctx); 595 } 596 597 static inline bool tls_sw_has_ctx_rx(const struct sock *sk) 598 { 599 struct tls_context *ctx = tls_get_ctx(sk); 600 601 if (!ctx) 602 return false; 603 return !!tls_sw_ctx_rx(ctx); 604 } 605 606 void tls_sw_write_space(struct sock *sk, struct tls_context *ctx); 607 void tls_device_write_space(struct sock *sk, struct tls_context *ctx); 608 609 static inline struct tls_offload_context_rx * 610 tls_offload_ctx_rx(const struct tls_context *tls_ctx) 611 { 612 return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx; 613 } 614 615 #if IS_ENABLED(CONFIG_TLS_DEVICE) 616 static inline void *__tls_driver_ctx(struct tls_context *tls_ctx, 617 enum tls_offload_ctx_dir direction) 618 { 619 if (direction == TLS_OFFLOAD_CTX_DIR_TX) 620 return tls_offload_ctx_tx(tls_ctx)->driver_state; 621 else 622 return tls_offload_ctx_rx(tls_ctx)->driver_state; 623 } 624 625 static inline void * 626 tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction) 627 { 628 return __tls_driver_ctx(tls_get_ctx(sk), direction); 629 } 630 #endif 631 632 #define RESYNC_REQ BIT(0) 633 #define RESYNC_REQ_ASYNC BIT(1) 634 /* The TLS context is valid until sk_destruct is called */ 635 static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq) 636 { 637 struct tls_context *tls_ctx = tls_get_ctx(sk); 638 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); 639 640 atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | RESYNC_REQ); 641 } 642 643 /* Log all TLS record header TCP sequences in [seq, seq+len] */ 644 static inline void 645 tls_offload_rx_resync_async_request_start(struct sock *sk, __be32 seq, u16 len) 646 { 647 struct tls_context *tls_ctx = tls_get_ctx(sk); 648 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); 649 650 atomic64_set(&rx_ctx->resync_async->req, ((u64)ntohl(seq) << 32) | 651 ((u64)len << 16) | RESYNC_REQ | RESYNC_REQ_ASYNC); 652 rx_ctx->resync_async->loglen = 0; 653 rx_ctx->resync_async->rcd_delta = 0; 654 } 655 656 static inline void 657 tls_offload_rx_resync_async_request_end(struct sock *sk, __be32 seq) 658 { 659 struct tls_context *tls_ctx = tls_get_ctx(sk); 660 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); 661 662 atomic64_set(&rx_ctx->resync_async->req, 663 ((u64)ntohl(seq) << 32) | RESYNC_REQ); 664 } 665 666 static inline void 667 tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type) 668 { 669 struct tls_context *tls_ctx = tls_get_ctx(sk); 670 671 tls_offload_ctx_rx(tls_ctx)->resync_type = type; 672 } 673 674 /* Driver's seq tracking has to be disabled until resync succeeded */ 675 static inline bool tls_offload_tx_resync_pending(struct sock *sk) 676 { 677 struct tls_context *tls_ctx = tls_get_ctx(sk); 678 bool ret; 679 680 ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags); 681 smp_mb__after_atomic(); 682 return ret; 683 } 684 685 int __net_init tls_proc_init(struct net *net); 686 void __net_exit tls_proc_fini(struct net *net); 687 688 int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 689 unsigned char *record_type); 690 int decrypt_skb(struct sock *sk, struct sk_buff *skb, 691 struct scatterlist *sgout); 692 struct sk_buff *tls_encrypt_skb(struct sk_buff *skb); 693 694 int tls_sw_fallback_init(struct sock *sk, 695 struct tls_offload_context_tx *offload_ctx, 696 struct tls_crypto_info *crypto_info); 697 698 #ifdef CONFIG_TLS_DEVICE 699 void tls_device_init(void); 700 void tls_device_cleanup(void); 701 void tls_device_sk_destruct(struct sock *sk); 702 int tls_set_device_offload(struct sock *sk, struct tls_context *ctx); 703 void tls_device_free_resources_tx(struct sock *sk); 704 int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx); 705 void tls_device_offload_cleanup_rx(struct sock *sk); 706 void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq); 707 void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq); 708 int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, 709 struct sk_buff *skb, struct strp_msg *rxm); 710 711 static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk) 712 { 713 if (!sk_fullsock(sk) || 714 smp_load_acquire(&sk->sk_destruct) != tls_device_sk_destruct) 715 return false; 716 return tls_get_ctx(sk)->rx_conf == TLS_HW; 717 } 718 #else 719 static inline void tls_device_init(void) {} 720 static inline void tls_device_cleanup(void) {} 721 722 static inline int 723 tls_set_device_offload(struct sock *sk, struct tls_context *ctx) 724 { 725 return -EOPNOTSUPP; 726 } 727 728 static inline void tls_device_free_resources_tx(struct sock *sk) {} 729 730 static inline int 731 tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) 732 { 733 return -EOPNOTSUPP; 734 } 735 736 static inline void tls_device_offload_cleanup_rx(struct sock *sk) {} 737 static inline void 738 tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {} 739 740 static inline int 741 tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, 742 struct sk_buff *skb, struct strp_msg *rxm) 743 { 744 return 0; 745 } 746 #endif 747 #endif /* _TLS_OFFLOAD_H */ 748