Loading...
Note: File does not exist in v3.1.
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
85enum {
86 TLS_BASE,
87 TLS_SW,
88 TLS_HW,
89 TLS_HW_RECORD,
90 TLS_NUM_CONFIG,
91};
92
93/* TLS records are maintained in 'struct tls_rec'. It stores the memory pages
94 * allocated or mapped for each TLS record. After encryption, the records are
95 * stores in a linked list.
96 */
97struct tls_rec {
98 struct list_head list;
99 int tx_ready;
100 int tx_flags;
101
102 struct sk_msg msg_plaintext;
103 struct sk_msg msg_encrypted;
104
105 /* AAD | msg_plaintext.sg.data | sg_tag */
106 struct scatterlist sg_aead_in[2];
107 /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */
108 struct scatterlist sg_aead_out[2];
109
110 char content_type;
111 struct scatterlist sg_content_type;
112
113 char aad_space[TLS_AAD_SPACE_SIZE];
114 u8 iv_data[MAX_IV_SIZE];
115 struct aead_request aead_req;
116 u8 aead_req_ctx[];
117};
118
119struct tls_msg {
120 struct strp_msg rxm;
121 u8 control;
122};
123
124struct tx_work {
125 struct delayed_work work;
126 struct sock *sk;
127};
128
129struct tls_sw_context_tx {
130 struct crypto_aead *aead_send;
131 struct crypto_wait async_wait;
132 struct tx_work tx_work;
133 struct tls_rec *open_rec;
134 struct list_head tx_list;
135 atomic_t encrypt_pending;
136 /* protect crypto_wait with encrypt_pending */
137 spinlock_t encrypt_compl_lock;
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
146struct 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 u8 decrypted:1;
157 atomic_t decrypt_pending;
158 /* protect crypto_wait with decrypt_pending*/
159 spinlock_t decrypt_compl_lock;
160 bool async_notify;
161};
162
163struct tls_record_info {
164 struct list_head list;
165 u32 end_seq;
166 int len;
167 int num_frags;
168 skb_frag_t frags[MAX_SKB_FRAGS];
169};
170
171struct tls_offload_context_tx {
172 struct crypto_aead *aead_send;
173 spinlock_t lock; /* protects records list */
174 struct list_head records_list;
175 struct tls_record_info *open_record;
176 struct tls_record_info *retransmit_hint;
177 u64 hint_record_sn;
178 u64 unacked_record_sn;
179
180 struct scatterlist sg_tx_data[MAX_SKB_FRAGS];
181 void (*sk_destruct)(struct sock *sk);
182 u8 driver_state[] __aligned(8);
183 /* The TLS layer reserves room for driver specific state
184 * Currently the belief is that there is not enough
185 * driver specific state to justify another layer of indirection
186 */
187#define TLS_DRIVER_STATE_SIZE_TX 16
188};
189
190#define TLS_OFFLOAD_CONTEXT_SIZE_TX \
191 (sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX)
192
193enum tls_context_flags {
194 /* tls_device_down was called after the netdev went down, device state
195 * was released, and kTLS works in software, even though rx_conf is
196 * still TLS_HW (needed for transition).
197 */
198 TLS_RX_DEV_DEGRADED = 0,
199 /* Unlike RX where resync is driven entirely by the core in TX only
200 * the driver knows when things went out of sync, so we need the flag
201 * to be atomic.
202 */
203 TLS_TX_SYNC_SCHED = 1,
204 /* tls_dev_del was called for the RX side, device state was released,
205 * but tls_ctx->netdev might still be kept, because TX-side driver
206 * resources might not be released yet. Used to prevent the second
207 * tls_dev_del call in tls_device_down if it happens simultaneously.
208 */
209 TLS_RX_DEV_CLOSED = 2,
210};
211
212struct cipher_context {
213 char *iv;
214 char *rec_seq;
215};
216
217union tls_crypto_context {
218 struct tls_crypto_info info;
219 union {
220 struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
221 struct tls12_crypto_info_aes_gcm_256 aes_gcm_256;
222 struct tls12_crypto_info_chacha20_poly1305 chacha20_poly1305;
223 };
224};
225
226struct tls_prot_info {
227 u16 version;
228 u16 cipher_type;
229 u16 prepend_size;
230 u16 tag_size;
231 u16 overhead_size;
232 u16 iv_size;
233 u16 salt_size;
234 u16 rec_seq_size;
235 u16 aad_size;
236 u16 tail_size;
237};
238
239struct tls_context {
240 /* read-only cache line */
241 struct tls_prot_info prot_info;
242
243 u8 tx_conf:3;
244 u8 rx_conf:3;
245
246 int (*push_pending_record)(struct sock *sk, int flags);
247 void (*sk_write_space)(struct sock *sk);
248
249 void *priv_ctx_tx;
250 void *priv_ctx_rx;
251
252 struct net_device *netdev;
253
254 /* rw cache line */
255 struct cipher_context tx;
256 struct cipher_context rx;
257
258 struct scatterlist *partially_sent_record;
259 u16 partially_sent_offset;
260
261 bool in_tcp_sendpages;
262 bool pending_open_record_frags;
263
264 struct mutex tx_lock; /* protects partially_sent_* fields and
265 * per-type TX fields
266 */
267 unsigned long flags;
268
269 /* cache cold stuff */
270 struct proto *sk_proto;
271 struct sock *sk;
272
273 void (*sk_destruct)(struct sock *sk);
274
275 union tls_crypto_context crypto_send;
276 union tls_crypto_context crypto_recv;
277
278 struct list_head list;
279 refcount_t refcount;
280 struct rcu_head rcu;
281};
282
283enum tls_offload_ctx_dir {
284 TLS_OFFLOAD_CTX_DIR_RX,
285 TLS_OFFLOAD_CTX_DIR_TX,
286};
287
288struct tlsdev_ops {
289 int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
290 enum tls_offload_ctx_dir direction,
291 struct tls_crypto_info *crypto_info,
292 u32 start_offload_tcp_sn);
293 void (*tls_dev_del)(struct net_device *netdev,
294 struct tls_context *ctx,
295 enum tls_offload_ctx_dir direction);
296 int (*tls_dev_resync)(struct net_device *netdev,
297 struct sock *sk, u32 seq, u8 *rcd_sn,
298 enum tls_offload_ctx_dir direction);
299};
300
301enum tls_offload_sync_type {
302 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0,
303 TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1,
304 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC = 2,
305};
306
307#define TLS_DEVICE_RESYNC_NH_START_IVAL 2
308#define TLS_DEVICE_RESYNC_NH_MAX_IVAL 128
309
310#define TLS_DEVICE_RESYNC_ASYNC_LOGMAX 13
311struct tls_offload_resync_async {
312 atomic64_t req;
313 u16 loglen;
314 u16 rcd_delta;
315 u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX];
316};
317
318struct tls_offload_context_rx {
319 /* sw must be the first member of tls_offload_context_rx */
320 struct tls_sw_context_rx sw;
321 enum tls_offload_sync_type resync_type;
322 /* this member is set regardless of resync_type, to avoid branches */
323 u8 resync_nh_reset:1;
324 /* CORE_NEXT_HINT-only member, but use the hole here */
325 u8 resync_nh_do_now:1;
326 union {
327 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */
328 struct {
329 atomic64_t resync_req;
330 };
331 /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */
332 struct {
333 u32 decrypted_failed;
334 u32 decrypted_tgt;
335 } resync_nh;
336 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC */
337 struct {
338 struct tls_offload_resync_async *resync_async;
339 };
340 };
341 u8 driver_state[] __aligned(8);
342 /* The TLS layer reserves room for driver specific state
343 * Currently the belief is that there is not enough
344 * driver specific state to justify another layer of indirection
345 */
346#define TLS_DRIVER_STATE_SIZE_RX 8
347};
348
349#define TLS_OFFLOAD_CONTEXT_SIZE_RX \
350 (sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX)
351
352struct tls_context *tls_ctx_create(struct sock *sk);
353void tls_ctx_free(struct sock *sk, struct tls_context *ctx);
354void update_sk_prot(struct sock *sk, struct tls_context *ctx);
355
356int wait_on_pending_writer(struct sock *sk, long *timeo);
357int tls_sk_query(struct sock *sk, int optname, char __user *optval,
358 int __user *optlen);
359int tls_sk_attach(struct sock *sk, int optname, char __user *optval,
360 unsigned int optlen);
361
362int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
363void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
364void tls_sw_strparser_done(struct tls_context *tls_ctx);
365int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
366int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
367 int offset, size_t size, int flags);
368int tls_sw_sendpage(struct sock *sk, struct page *page,
369 int offset, size_t size, int flags);
370void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);
371void tls_sw_release_resources_tx(struct sock *sk);
372void tls_sw_free_ctx_tx(struct tls_context *tls_ctx);
373void tls_sw_free_resources_rx(struct sock *sk);
374void tls_sw_release_resources_rx(struct sock *sk);
375void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
376int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
377 int nonblock, int flags, int *addr_len);
378bool tls_sw_stream_read(const struct sock *sk);
379ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
380 struct pipe_inode_info *pipe,
381 size_t len, unsigned int flags);
382
383int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
384int tls_device_sendpage(struct sock *sk, struct page *page,
385 int offset, size_t size, int flags);
386int tls_tx_records(struct sock *sk, int flags);
387
388struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context,
389 u32 seq, u64 *p_record_sn);
390
391static inline bool tls_record_is_start_marker(struct tls_record_info *rec)
392{
393 return rec->len == 0;
394}
395
396static inline u32 tls_record_start_seq(struct tls_record_info *rec)
397{
398 return rec->end_seq - rec->len;
399}
400
401int tls_push_sg(struct sock *sk, struct tls_context *ctx,
402 struct scatterlist *sg, u16 first_offset,
403 int flags);
404int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
405 int flags);
406void tls_free_partial_record(struct sock *sk, struct tls_context *ctx);
407
408static inline struct tls_msg *tls_msg(struct sk_buff *skb)
409{
410 return (struct tls_msg *)strp_msg(skb);
411}
412
413static inline bool tls_is_partially_sent_record(struct tls_context *ctx)
414{
415 return !!ctx->partially_sent_record;
416}
417
418static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)
419{
420 return tls_ctx->pending_open_record_frags;
421}
422
423static inline bool is_tx_ready(struct tls_sw_context_tx *ctx)
424{
425 struct tls_rec *rec;
426
427 rec = list_first_entry(&ctx->tx_list, struct tls_rec, list);
428 if (!rec)
429 return false;
430
431 return READ_ONCE(rec->tx_ready);
432}
433
434static inline u16 tls_user_config(struct tls_context *ctx, bool tx)
435{
436 u16 config = tx ? ctx->tx_conf : ctx->rx_conf;
437
438 switch (config) {
439 case TLS_BASE:
440 return TLS_CONF_BASE;
441 case TLS_SW:
442 return TLS_CONF_SW;
443 case TLS_HW:
444 return TLS_CONF_HW;
445 case TLS_HW_RECORD:
446 return TLS_CONF_HW_RECORD;
447 }
448 return 0;
449}
450
451struct sk_buff *
452tls_validate_xmit_skb(struct sock *sk, struct net_device *dev,
453 struct sk_buff *skb);
454struct sk_buff *
455tls_validate_xmit_skb_sw(struct sock *sk, struct net_device *dev,
456 struct sk_buff *skb);
457
458static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk)
459{
460#ifdef CONFIG_SOCK_VALIDATE_XMIT
461 return sk_fullsock(sk) &&
462 (smp_load_acquire(&sk->sk_validate_xmit_skb) ==
463 &tls_validate_xmit_skb);
464#else
465 return false;
466#endif
467}
468
469static inline void tls_err_abort(struct sock *sk, int err)
470{
471 sk->sk_err = err;
472 sk_error_report(sk);
473}
474
475static inline bool tls_bigint_increment(unsigned char *seq, int len)
476{
477 int i;
478
479 for (i = len - 1; i >= 0; i--) {
480 ++seq[i];
481 if (seq[i] != 0)
482 break;
483 }
484
485 return (i == -1);
486}
487
488static inline void tls_bigint_subtract(unsigned char *seq, int n)
489{
490 u64 rcd_sn;
491 __be64 *p;
492
493 BUILD_BUG_ON(TLS_MAX_REC_SEQ_SIZE != 8);
494
495 p = (__be64 *)seq;
496 rcd_sn = be64_to_cpu(*p);
497 *p = cpu_to_be64(rcd_sn - n);
498}
499
500static inline struct tls_context *tls_get_ctx(const struct sock *sk)
501{
502 struct inet_connection_sock *icsk = inet_csk(sk);
503
504 /* Use RCU on icsk_ulp_data only for sock diag code,
505 * TLS data path doesn't need rcu_dereference().
506 */
507 return (__force void *)icsk->icsk_ulp_data;
508}
509
510static inline void tls_advance_record_sn(struct sock *sk,
511 struct tls_prot_info *prot,
512 struct cipher_context *ctx)
513{
514 if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
515 tls_err_abort(sk, EBADMSG);
516
517 if (prot->version != TLS_1_3_VERSION &&
518 prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305)
519 tls_bigint_increment(ctx->iv + prot->salt_size,
520 prot->iv_size);
521}
522
523static inline void tls_fill_prepend(struct tls_context *ctx,
524 char *buf,
525 size_t plaintext_len,
526 unsigned char record_type)
527{
528 struct tls_prot_info *prot = &ctx->prot_info;
529 size_t pkt_len, iv_size = prot->iv_size;
530
531 pkt_len = plaintext_len + prot->tag_size;
532 if (prot->version != TLS_1_3_VERSION &&
533 prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) {
534 pkt_len += iv_size;
535
536 memcpy(buf + TLS_NONCE_OFFSET,
537 ctx->tx.iv + prot->salt_size, iv_size);
538 }
539
540 /* we cover nonce explicit here as well, so buf should be of
541 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE
542 */
543 buf[0] = prot->version == TLS_1_3_VERSION ?
544 TLS_RECORD_TYPE_DATA : record_type;
545 /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */
546 buf[1] = TLS_1_2_VERSION_MINOR;
547 buf[2] = TLS_1_2_VERSION_MAJOR;
548 /* we can use IV for nonce explicit according to spec */
549 buf[3] = pkt_len >> 8;
550 buf[4] = pkt_len & 0xFF;
551}
552
553static inline void tls_make_aad(char *buf,
554 size_t size,
555 char *record_sequence,
556 unsigned char record_type,
557 struct tls_prot_info *prot)
558{
559 if (prot->version != TLS_1_3_VERSION) {
560 memcpy(buf, record_sequence, prot->rec_seq_size);
561 buf += 8;
562 } else {
563 size += prot->tag_size;
564 }
565
566 buf[0] = prot->version == TLS_1_3_VERSION ?
567 TLS_RECORD_TYPE_DATA : record_type;
568 buf[1] = TLS_1_2_VERSION_MAJOR;
569 buf[2] = TLS_1_2_VERSION_MINOR;
570 buf[3] = size >> 8;
571 buf[4] = size & 0xFF;
572}
573
574static inline void xor_iv_with_seq(struct tls_prot_info *prot, char *iv, char *seq)
575{
576 int i;
577
578 if (prot->version == TLS_1_3_VERSION ||
579 prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) {
580 for (i = 0; i < 8; i++)
581 iv[i + 4] ^= seq[i];
582 }
583}
584
585
586static inline struct tls_sw_context_rx *tls_sw_ctx_rx(
587 const struct tls_context *tls_ctx)
588{
589 return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx;
590}
591
592static inline struct tls_sw_context_tx *tls_sw_ctx_tx(
593 const struct tls_context *tls_ctx)
594{
595 return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx;
596}
597
598static inline struct tls_offload_context_tx *
599tls_offload_ctx_tx(const struct tls_context *tls_ctx)
600{
601 return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx;
602}
603
604static inline bool tls_sw_has_ctx_tx(const struct sock *sk)
605{
606 struct tls_context *ctx = tls_get_ctx(sk);
607
608 if (!ctx)
609 return false;
610 return !!tls_sw_ctx_tx(ctx);
611}
612
613static inline bool tls_sw_has_ctx_rx(const struct sock *sk)
614{
615 struct tls_context *ctx = tls_get_ctx(sk);
616
617 if (!ctx)
618 return false;
619 return !!tls_sw_ctx_rx(ctx);
620}
621
622void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
623void tls_device_write_space(struct sock *sk, struct tls_context *ctx);
624
625static inline struct tls_offload_context_rx *
626tls_offload_ctx_rx(const struct tls_context *tls_ctx)
627{
628 return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx;
629}
630
631#if IS_ENABLED(CONFIG_TLS_DEVICE)
632static inline void *__tls_driver_ctx(struct tls_context *tls_ctx,
633 enum tls_offload_ctx_dir direction)
634{
635 if (direction == TLS_OFFLOAD_CTX_DIR_TX)
636 return tls_offload_ctx_tx(tls_ctx)->driver_state;
637 else
638 return tls_offload_ctx_rx(tls_ctx)->driver_state;
639}
640
641static inline void *
642tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction)
643{
644 return __tls_driver_ctx(tls_get_ctx(sk), direction);
645}
646#endif
647
648#define RESYNC_REQ BIT(0)
649#define RESYNC_REQ_ASYNC BIT(1)
650/* The TLS context is valid until sk_destruct is called */
651static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
652{
653 struct tls_context *tls_ctx = tls_get_ctx(sk);
654 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
655
656 atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | RESYNC_REQ);
657}
658
659/* Log all TLS record header TCP sequences in [seq, seq+len] */
660static inline void
661tls_offload_rx_resync_async_request_start(struct sock *sk, __be32 seq, u16 len)
662{
663 struct tls_context *tls_ctx = tls_get_ctx(sk);
664 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
665
666 atomic64_set(&rx_ctx->resync_async->req, ((u64)ntohl(seq) << 32) |
667 ((u64)len << 16) | RESYNC_REQ | RESYNC_REQ_ASYNC);
668 rx_ctx->resync_async->loglen = 0;
669 rx_ctx->resync_async->rcd_delta = 0;
670}
671
672static inline void
673tls_offload_rx_resync_async_request_end(struct sock *sk, __be32 seq)
674{
675 struct tls_context *tls_ctx = tls_get_ctx(sk);
676 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
677
678 atomic64_set(&rx_ctx->resync_async->req,
679 ((u64)ntohl(seq) << 32) | RESYNC_REQ);
680}
681
682static inline void
683tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type)
684{
685 struct tls_context *tls_ctx = tls_get_ctx(sk);
686
687 tls_offload_ctx_rx(tls_ctx)->resync_type = type;
688}
689
690/* Driver's seq tracking has to be disabled until resync succeeded */
691static inline bool tls_offload_tx_resync_pending(struct sock *sk)
692{
693 struct tls_context *tls_ctx = tls_get_ctx(sk);
694 bool ret;
695
696 ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags);
697 smp_mb__after_atomic();
698 return ret;
699}
700
701int __net_init tls_proc_init(struct net *net);
702void __net_exit tls_proc_fini(struct net *net);
703
704int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
705 unsigned char *record_type);
706int decrypt_skb(struct sock *sk, struct sk_buff *skb,
707 struct scatterlist *sgout);
708struct sk_buff *tls_encrypt_skb(struct sk_buff *skb);
709
710int tls_sw_fallback_init(struct sock *sk,
711 struct tls_offload_context_tx *offload_ctx,
712 struct tls_crypto_info *crypto_info);
713
714#ifdef CONFIG_TLS_DEVICE
715void tls_device_init(void);
716void tls_device_cleanup(void);
717void tls_device_sk_destruct(struct sock *sk);
718int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
719void tls_device_free_resources_tx(struct sock *sk);
720int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
721void tls_device_offload_cleanup_rx(struct sock *sk);
722void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
723void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq);
724int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
725 struct sk_buff *skb, struct strp_msg *rxm);
726
727static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk)
728{
729 if (!sk_fullsock(sk) ||
730 smp_load_acquire(&sk->sk_destruct) != tls_device_sk_destruct)
731 return false;
732 return tls_get_ctx(sk)->rx_conf == TLS_HW;
733}
734#else
735static inline void tls_device_init(void) {}
736static inline void tls_device_cleanup(void) {}
737
738static inline int
739tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
740{
741 return -EOPNOTSUPP;
742}
743
744static inline void tls_device_free_resources_tx(struct sock *sk) {}
745
746static inline int
747tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
748{
749 return -EOPNOTSUPP;
750}
751
752static inline void tls_device_offload_cleanup_rx(struct sock *sk) {}
753static inline void
754tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {}
755
756static inline int
757tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
758 struct sk_buff *skb, struct strp_msg *rxm)
759{
760 return 0;
761}
762#endif
763#endif /* _TLS_OFFLOAD_H */