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