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3c4d7559 DW |
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> | |
b9f3eb49 | 38 | #include <asm/byteorder.h> |
a54667f6 | 39 | #include <linux/crypto.h> |
b9f3eb49 DL |
40 | #include <linux/socket.h> |
41 | #include <linux/tcp.h> | |
d829e9c4 DB |
42 | #include <linux/skmsg.h> |
43 | ||
b9f3eb49 | 44 | #include <net/tcp.h> |
c46234eb | 45 | #include <net/strparser.h> |
a42055e8 | 46 | #include <crypto/aead.h> |
3c4d7559 DW |
47 | #include <uapi/linux/tls.h> |
48 | ||
49 | ||
50 | /* Maximum data size carried in a TLS record */ | |
51 | #define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14) | |
52 | ||
53 | #define TLS_HEADER_SIZE 5 | |
54 | #define TLS_NONCE_OFFSET TLS_HEADER_SIZE | |
55 | ||
56 | #define TLS_CRYPTO_INFO_READY(info) ((info)->cipher_type) | |
57 | ||
58 | #define TLS_RECORD_TYPE_DATA 0x17 | |
59 | ||
60 | #define TLS_AAD_SPACE_SIZE 13 | |
dd0bed16 AG |
61 | #define TLS_DEVICE_NAME_MAX 32 |
62 | ||
63 | /* | |
64 | * This structure defines the routines for Inline TLS driver. | |
65 | * The following routines are optional and filled with a | |
66 | * null pointer if not defined. | |
67 | * | |
68 | * @name: Its the name of registered Inline tls device | |
69 | * @dev_list: Inline tls device list | |
70 | * int (*feature)(struct tls_device *device); | |
71 | * Called to return Inline TLS driver capability | |
72 | * | |
73 | * int (*hash)(struct tls_device *device, struct sock *sk); | |
74 | * This function sets Inline driver for listen and program | |
75 | * device specific functioanlity as required | |
76 | * | |
77 | * void (*unhash)(struct tls_device *device, struct sock *sk); | |
78 | * This function cleans listen state set by Inline TLS driver | |
df9d4a17 AG |
79 | * |
80 | * void (*release)(struct kref *kref); | |
81 | * Release the registered device and allocated resources | |
82 | * @kref: Number of reference to tls_device | |
dd0bed16 AG |
83 | */ |
84 | struct tls_device { | |
85 | char name[TLS_DEVICE_NAME_MAX]; | |
86 | struct list_head dev_list; | |
87 | int (*feature)(struct tls_device *device); | |
88 | int (*hash)(struct tls_device *device, struct sock *sk); | |
89 | void (*unhash)(struct tls_device *device, struct sock *sk); | |
df9d4a17 AG |
90 | void (*release)(struct kref *kref); |
91 | struct kref kref; | |
dd0bed16 | 92 | }; |
3c4d7559 | 93 | |
4799ac81 BP |
94 | enum { |
95 | TLS_BASE, | |
96 | TLS_SW, | |
97 | #ifdef CONFIG_TLS_DEVICE | |
98 | TLS_HW, | |
99 | #endif | |
100 | TLS_HW_RECORD, | |
101 | TLS_NUM_CONFIG, | |
102 | }; | |
103 | ||
a42055e8 VG |
104 | /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages |
105 | * allocated or mapped for each TLS record. After encryption, the records are | |
106 | * stores in a linked list. | |
107 | */ | |
108 | struct tls_rec { | |
109 | struct list_head list; | |
9932a29a | 110 | int tx_ready; |
a42055e8 | 111 | int tx_flags; |
4e6d4720 | 112 | int inplace_crypto; |
3c4d7559 | 113 | |
d829e9c4 DB |
114 | struct sk_msg msg_plaintext; |
115 | struct sk_msg msg_encrypted; | |
a42055e8 | 116 | |
d829e9c4 DB |
117 | /* AAD | msg_plaintext.sg.data | sg_tag */ |
118 | struct scatterlist sg_aead_in[2]; | |
119 | /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */ | |
120 | struct scatterlist sg_aead_out[2]; | |
a42055e8 | 121 | |
130b392c DW |
122 | char content_type; |
123 | struct scatterlist sg_content_type; | |
124 | ||
a42055e8 | 125 | char aad_space[TLS_AAD_SPACE_SIZE]; |
32eb67b9 DW |
126 | u8 iv_data[TLS_CIPHER_AES_GCM_128_IV_SIZE + |
127 | TLS_CIPHER_AES_GCM_128_SALT_SIZE]; | |
a42055e8 VG |
128 | struct aead_request aead_req; |
129 | u8 aead_req_ctx[]; | |
130 | }; | |
131 | ||
2b794c40 VG |
132 | struct tls_msg { |
133 | struct strp_msg rxm; | |
134 | u8 control; | |
135 | }; | |
136 | ||
a42055e8 VG |
137 | struct tx_work { |
138 | struct delayed_work work; | |
139 | struct sock *sk; | |
140 | }; | |
141 | ||
142 | struct tls_sw_context_tx { | |
143 | struct crypto_aead *aead_send; | |
144 | struct crypto_wait async_wait; | |
145 | struct tx_work tx_work; | |
146 | struct tls_rec *open_rec; | |
9932a29a | 147 | struct list_head tx_list; |
a42055e8 VG |
148 | atomic_t encrypt_pending; |
149 | int async_notify; | |
5b053e12 | 150 | int async_capable; |
a42055e8 VG |
151 | |
152 | #define BIT_TX_SCHEDULED 0 | |
153 | unsigned long tx_bitmask; | |
3c4d7559 DW |
154 | }; |
155 | ||
f66de3ee BP |
156 | struct tls_sw_context_rx { |
157 | struct crypto_aead *aead_recv; | |
158 | struct crypto_wait async_wait; | |
f66de3ee | 159 | struct strparser strp; |
692d7b5d | 160 | struct sk_buff_head rx_list; /* list of decrypted 'data' records */ |
f66de3ee | 161 | void (*saved_data_ready)(struct sock *sk); |
924ad65e | 162 | |
f66de3ee BP |
163 | struct sk_buff *recv_pkt; |
164 | u8 control; | |
692d7b5d | 165 | int async_capable; |
f66de3ee | 166 | bool decrypted; |
94524d8f VG |
167 | atomic_t decrypt_pending; |
168 | bool async_notify; | |
169 | }; | |
170 | ||
e8f69799 IL |
171 | struct tls_record_info { |
172 | struct list_head list; | |
173 | u32 end_seq; | |
174 | int len; | |
175 | int num_frags; | |
176 | skb_frag_t frags[MAX_SKB_FRAGS]; | |
177 | }; | |
178 | ||
d80a1b9d | 179 | struct tls_offload_context_tx { |
e8f69799 IL |
180 | struct crypto_aead *aead_send; |
181 | spinlock_t lock; /* protects records list */ | |
182 | struct list_head records_list; | |
183 | struct tls_record_info *open_record; | |
184 | struct tls_record_info *retransmit_hint; | |
185 | u64 hint_record_sn; | |
186 | u64 unacked_record_sn; | |
187 | ||
188 | struct scatterlist sg_tx_data[MAX_SKB_FRAGS]; | |
189 | void (*sk_destruct)(struct sock *sk); | |
190 | u8 driver_state[]; | |
191 | /* The TLS layer reserves room for driver specific state | |
192 | * Currently the belief is that there is not enough | |
193 | * driver specific state to justify another layer of indirection | |
194 | */ | |
195 | #define TLS_DRIVER_STATE_SIZE (max_t(size_t, 8, sizeof(void *))) | |
196 | }; | |
197 | ||
d80a1b9d BP |
198 | #define TLS_OFFLOAD_CONTEXT_SIZE_TX \ |
199 | (ALIGN(sizeof(struct tls_offload_context_tx), sizeof(void *)) + \ | |
e8f69799 IL |
200 | TLS_DRIVER_STATE_SIZE) |
201 | ||
dbe42559 | 202 | struct cipher_context { |
dbe42559 | 203 | char *iv; |
dbe42559 DW |
204 | char *rec_seq; |
205 | }; | |
206 | ||
86029d10 SD |
207 | union tls_crypto_context { |
208 | struct tls_crypto_info info; | |
fb99bce7 DW |
209 | union { |
210 | struct tls12_crypto_info_aes_gcm_128 aes_gcm_128; | |
211 | struct tls12_crypto_info_aes_gcm_256 aes_gcm_256; | |
212 | }; | |
86029d10 SD |
213 | }; |
214 | ||
4509de14 VG |
215 | struct tls_prot_info { |
216 | u16 version; | |
217 | u16 cipher_type; | |
218 | u16 prepend_size; | |
219 | u16 tag_size; | |
220 | u16 overhead_size; | |
221 | u16 iv_size; | |
222 | u16 rec_seq_size; | |
223 | u16 aad_size; | |
224 | u16 tail_size; | |
225 | }; | |
226 | ||
3c4d7559 | 227 | struct tls_context { |
4509de14 VG |
228 | struct tls_prot_info prot_info; |
229 | ||
86029d10 SD |
230 | union tls_crypto_context crypto_send; |
231 | union tls_crypto_context crypto_recv; | |
3c4d7559 | 232 | |
f66de3ee BP |
233 | struct list_head list; |
234 | struct net_device *netdev; | |
235 | refcount_t refcount; | |
236 | ||
237 | void *priv_ctx_tx; | |
238 | void *priv_ctx_rx; | |
3c4d7559 | 239 | |
f66de3ee BP |
240 | u8 tx_conf:3; |
241 | u8 rx_conf:3; | |
6d88207f | 242 | |
dbe42559 | 243 | struct cipher_context tx; |
c46234eb | 244 | struct cipher_context rx; |
3c4d7559 DW |
245 | |
246 | struct scatterlist *partially_sent_record; | |
247 | u16 partially_sent_offset; | |
a42055e8 | 248 | |
3c4d7559 | 249 | unsigned long flags; |
c212d2c7 | 250 | bool in_tcp_sendpages; |
d829e9c4 | 251 | bool pending_open_record_frags; |
3c4d7559 | 252 | |
3c4d7559 | 253 | int (*push_pending_record)(struct sock *sk, int flags); |
3c4d7559 DW |
254 | |
255 | void (*sk_write_space)(struct sock *sk); | |
4799ac81 | 256 | void (*sk_destruct)(struct sock *sk); |
3c4d7559 DW |
257 | void (*sk_proto_close)(struct sock *sk, long timeout); |
258 | ||
259 | int (*setsockopt)(struct sock *sk, int level, | |
260 | int optname, char __user *optval, | |
261 | unsigned int optlen); | |
262 | int (*getsockopt)(struct sock *sk, int level, | |
263 | int optname, char __user *optval, | |
264 | int __user *optlen); | |
dd0bed16 AG |
265 | int (*hash)(struct sock *sk); |
266 | void (*unhash)(struct sock *sk); | |
3c4d7559 DW |
267 | }; |
268 | ||
4799ac81 BP |
269 | struct tls_offload_context_rx { |
270 | /* sw must be the first member of tls_offload_context_rx */ | |
271 | struct tls_sw_context_rx sw; | |
272 | atomic64_t resync_req; | |
273 | u8 driver_state[]; | |
274 | /* The TLS layer reserves room for driver specific state | |
275 | * Currently the belief is that there is not enough | |
276 | * driver specific state to justify another layer of indirection | |
277 | */ | |
278 | }; | |
279 | ||
280 | #define TLS_OFFLOAD_CONTEXT_SIZE_RX \ | |
281 | (ALIGN(sizeof(struct tls_offload_context_rx), sizeof(void *)) + \ | |
282 | TLS_DRIVER_STATE_SIZE) | |
283 | ||
3c4d7559 DW |
284 | int wait_on_pending_writer(struct sock *sk, long *timeo); |
285 | int tls_sk_query(struct sock *sk, int optname, char __user *optval, | |
286 | int __user *optlen); | |
287 | int tls_sk_attach(struct sock *sk, int optname, char __user *optval, | |
288 | unsigned int optlen); | |
289 | ||
c46234eb | 290 | int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx); |
3c4d7559 DW |
291 | int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); |
292 | int tls_sw_sendpage(struct sock *sk, struct page *page, | |
293 | int offset, size_t size, int flags); | |
294 | void tls_sw_close(struct sock *sk, long timeout); | |
f66de3ee BP |
295 | void tls_sw_free_resources_tx(struct sock *sk); |
296 | void tls_sw_free_resources_rx(struct sock *sk); | |
39f56e1a | 297 | void tls_sw_release_resources_rx(struct sock *sk); |
c46234eb DW |
298 | int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
299 | int nonblock, int flags, int *addr_len); | |
924ad65e | 300 | bool tls_sw_stream_read(const struct sock *sk); |
c46234eb DW |
301 | ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, |
302 | struct pipe_inode_info *pipe, | |
303 | size_t len, unsigned int flags); | |
3c4d7559 | 304 | |
e8f69799 IL |
305 | int tls_set_device_offload(struct sock *sk, struct tls_context *ctx); |
306 | int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); | |
307 | int tls_device_sendpage(struct sock *sk, struct page *page, | |
308 | int offset, size_t size, int flags); | |
309 | void tls_device_sk_destruct(struct sock *sk); | |
310 | void tls_device_init(void); | |
311 | void tls_device_cleanup(void); | |
a42055e8 | 312 | int tls_tx_records(struct sock *sk, int flags); |
e8f69799 | 313 | |
d80a1b9d | 314 | struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, |
e8f69799 IL |
315 | u32 seq, u64 *p_record_sn); |
316 | ||
317 | static inline bool tls_record_is_start_marker(struct tls_record_info *rec) | |
318 | { | |
319 | return rec->len == 0; | |
320 | } | |
321 | ||
322 | static inline u32 tls_record_start_seq(struct tls_record_info *rec) | |
323 | { | |
324 | return rec->end_seq - rec->len; | |
325 | } | |
3c4d7559 | 326 | |
e8f69799 | 327 | void tls_sk_destruct(struct sock *sk, struct tls_context *ctx); |
3c4d7559 DW |
328 | int tls_push_sg(struct sock *sk, struct tls_context *ctx, |
329 | struct scatterlist *sg, u16 first_offset, | |
330 | int flags); | |
a42055e8 VG |
331 | int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, |
332 | int flags); | |
333 | ||
2b794c40 VG |
334 | static inline struct tls_msg *tls_msg(struct sk_buff *skb) |
335 | { | |
336 | return (struct tls_msg *)strp_msg(skb); | |
337 | } | |
338 | ||
94850257 | 339 | static inline bool tls_is_partially_sent_record(struct tls_context *ctx) |
3c4d7559 | 340 | { |
94850257 | 341 | return !!ctx->partially_sent_record; |
3c4d7559 DW |
342 | } |
343 | ||
344 | static inline int tls_complete_pending_work(struct sock *sk, | |
345 | struct tls_context *ctx, | |
346 | int flags, long *timeo) | |
347 | { | |
348 | int rc = 0; | |
349 | ||
350 | if (unlikely(sk->sk_write_pending)) | |
351 | rc = wait_on_pending_writer(sk, timeo); | |
352 | ||
94850257 BP |
353 | if (!rc && tls_is_partially_sent_record(ctx)) |
354 | rc = tls_push_partial_record(sk, ctx, flags); | |
3c4d7559 DW |
355 | |
356 | return rc; | |
357 | } | |
358 | ||
3c4d7559 DW |
359 | static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx) |
360 | { | |
361 | return tls_ctx->pending_open_record_frags; | |
362 | } | |
363 | ||
9932a29a | 364 | static inline bool is_tx_ready(struct tls_sw_context_tx *ctx) |
a42055e8 VG |
365 | { |
366 | struct tls_rec *rec; | |
a42055e8 | 367 | |
9932a29a | 368 | rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); |
a42055e8 VG |
369 | if (!rec) |
370 | return false; | |
371 | ||
9932a29a | 372 | return READ_ONCE(rec->tx_ready); |
a42055e8 VG |
373 | } |
374 | ||
4799ac81 BP |
375 | struct sk_buff * |
376 | tls_validate_xmit_skb(struct sock *sk, struct net_device *dev, | |
377 | struct sk_buff *skb); | |
378 | ||
e8f69799 IL |
379 | static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk) |
380 | { | |
4799ac81 BP |
381 | #ifdef CONFIG_SOCK_VALIDATE_XMIT |
382 | return sk_fullsock(sk) & | |
383 | (smp_load_acquire(&sk->sk_validate_xmit_skb) == | |
384 | &tls_validate_xmit_skb); | |
385 | #else | |
386 | return false; | |
387 | #endif | |
e8f69799 IL |
388 | } |
389 | ||
f4a8e43f | 390 | static inline void tls_err_abort(struct sock *sk, int err) |
3c4d7559 | 391 | { |
f4a8e43f | 392 | sk->sk_err = err; |
3c4d7559 DW |
393 | sk->sk_error_report(sk); |
394 | } | |
395 | ||
396 | static inline bool tls_bigint_increment(unsigned char *seq, int len) | |
397 | { | |
398 | int i; | |
399 | ||
400 | for (i = len - 1; i >= 0; i--) { | |
401 | ++seq[i]; | |
402 | if (seq[i] != 0) | |
403 | break; | |
404 | } | |
405 | ||
406 | return (i == -1); | |
407 | } | |
408 | ||
4509de14 VG |
409 | static inline struct tls_context *tls_get_ctx(const struct sock *sk) |
410 | { | |
411 | struct inet_connection_sock *icsk = inet_csk(sk); | |
412 | ||
413 | return icsk->icsk_ulp_data; | |
414 | } | |
415 | ||
3c4d7559 | 416 | static inline void tls_advance_record_sn(struct sock *sk, |
130b392c DW |
417 | struct cipher_context *ctx, |
418 | int version) | |
3c4d7559 | 419 | { |
4509de14 VG |
420 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
421 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
422 | ||
423 | if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size)) | |
f4a8e43f | 424 | tls_err_abort(sk, EBADMSG); |
130b392c DW |
425 | |
426 | if (version != TLS_1_3_VERSION) { | |
427 | tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, | |
4509de14 | 428 | prot->iv_size); |
130b392c | 429 | } |
3c4d7559 DW |
430 | } |
431 | ||
432 | static inline void tls_fill_prepend(struct tls_context *ctx, | |
433 | char *buf, | |
434 | size_t plaintext_len, | |
130b392c DW |
435 | unsigned char record_type, |
436 | int version) | |
3c4d7559 | 437 | { |
4509de14 VG |
438 | struct tls_prot_info *prot = &ctx->prot_info; |
439 | size_t pkt_len, iv_size = prot->iv_size; | |
3c4d7559 | 440 | |
4509de14 | 441 | pkt_len = plaintext_len + prot->tag_size; |
130b392c DW |
442 | if (version != TLS_1_3_VERSION) { |
443 | pkt_len += iv_size; | |
444 | ||
445 | memcpy(buf + TLS_NONCE_OFFSET, | |
446 | ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size); | |
447 | } | |
3c4d7559 DW |
448 | |
449 | /* we cover nonce explicit here as well, so buf should be of | |
450 | * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE | |
451 | */ | |
130b392c DW |
452 | buf[0] = version == TLS_1_3_VERSION ? |
453 | TLS_RECORD_TYPE_DATA : record_type; | |
454 | /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */ | |
455 | buf[1] = TLS_1_2_VERSION_MINOR; | |
456 | buf[2] = TLS_1_2_VERSION_MAJOR; | |
3c4d7559 DW |
457 | /* we can use IV for nonce explicit according to spec */ |
458 | buf[3] = pkt_len >> 8; | |
459 | buf[4] = pkt_len & 0xFF; | |
3c4d7559 DW |
460 | } |
461 | ||
213ef6e7 IL |
462 | static inline void tls_make_aad(char *buf, |
463 | size_t size, | |
464 | char *record_sequence, | |
465 | int record_sequence_size, | |
130b392c DW |
466 | unsigned char record_type, |
467 | int version) | |
468 | { | |
469 | if (version != TLS_1_3_VERSION) { | |
470 | memcpy(buf, record_sequence, record_sequence_size); | |
471 | buf += 8; | |
472 | } else { | |
473 | size += TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
474 | } | |
475 | ||
476 | buf[0] = version == TLS_1_3_VERSION ? | |
477 | TLS_RECORD_TYPE_DATA : record_type; | |
478 | buf[1] = TLS_1_2_VERSION_MAJOR; | |
479 | buf[2] = TLS_1_2_VERSION_MINOR; | |
480 | buf[3] = size >> 8; | |
481 | buf[4] = size & 0xFF; | |
482 | } | |
483 | ||
484 | static inline void xor_iv_with_seq(int version, char *iv, char *seq) | |
213ef6e7 | 485 | { |
130b392c | 486 | int i; |
213ef6e7 | 487 | |
130b392c DW |
488 | if (version == TLS_1_3_VERSION) { |
489 | for (i = 0; i < 8; i++) | |
490 | iv[i + 4] ^= seq[i]; | |
491 | } | |
213ef6e7 IL |
492 | } |
493 | ||
3c4d7559 | 494 | |
f66de3ee BP |
495 | static inline struct tls_sw_context_rx *tls_sw_ctx_rx( |
496 | const struct tls_context *tls_ctx) | |
497 | { | |
498 | return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx; | |
499 | } | |
500 | ||
501 | static inline struct tls_sw_context_tx *tls_sw_ctx_tx( | |
3c4d7559 DW |
502 | const struct tls_context *tls_ctx) |
503 | { | |
f66de3ee | 504 | return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx; |
3c4d7559 DW |
505 | } |
506 | ||
d80a1b9d BP |
507 | static inline struct tls_offload_context_tx * |
508 | tls_offload_ctx_tx(const struct tls_context *tls_ctx) | |
3c4d7559 | 509 | { |
d80a1b9d | 510 | return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx; |
3c4d7559 DW |
511 | } |
512 | ||
0608c69c JF |
513 | static inline bool tls_sw_has_ctx_tx(const struct sock *sk) |
514 | { | |
515 | struct tls_context *ctx = tls_get_ctx(sk); | |
516 | ||
517 | if (!ctx) | |
518 | return false; | |
519 | return !!tls_sw_ctx_tx(ctx); | |
520 | } | |
521 | ||
7463d3a2 BP |
522 | void tls_sw_write_space(struct sock *sk, struct tls_context *ctx); |
523 | void tls_device_write_space(struct sock *sk, struct tls_context *ctx); | |
524 | ||
4799ac81 BP |
525 | static inline struct tls_offload_context_rx * |
526 | tls_offload_ctx_rx(const struct tls_context *tls_ctx) | |
527 | { | |
528 | return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx; | |
529 | } | |
530 | ||
531 | /* The TLS context is valid until sk_destruct is called */ | |
532 | static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq) | |
533 | { | |
534 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
535 | struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); | |
536 | ||
537 | atomic64_set(&rx_ctx->resync_req, ((((uint64_t)seq) << 32) | 1)); | |
538 | } | |
539 | ||
540 | ||
3c4d7559 DW |
541 | int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, |
542 | unsigned char *record_type); | |
dd0bed16 AG |
543 | void tls_register_device(struct tls_device *device); |
544 | void tls_unregister_device(struct tls_device *device); | |
4799ac81 | 545 | int tls_device_decrypted(struct sock *sk, struct sk_buff *skb); |
dafb67f3 BP |
546 | int decrypt_skb(struct sock *sk, struct sk_buff *skb, |
547 | struct scatterlist *sgout); | |
3c4d7559 | 548 | |
e8f69799 IL |
549 | struct sk_buff *tls_validate_xmit_skb(struct sock *sk, |
550 | struct net_device *dev, | |
551 | struct sk_buff *skb); | |
552 | ||
553 | int tls_sw_fallback_init(struct sock *sk, | |
d80a1b9d | 554 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
555 | struct tls_crypto_info *crypto_info); |
556 | ||
4799ac81 BP |
557 | int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx); |
558 | ||
559 | void tls_device_offload_cleanup_rx(struct sock *sk); | |
560 | void handle_device_resync(struct sock *sk, u32 seq, u64 rcd_sn); | |
561 | ||
3c4d7559 | 562 | #endif /* _TLS_OFFLOAD_H */ |