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34#include <linux/module.h>
35
36#include <net/tcp.h>
37#include <net/inet_common.h>
38#include <linux/highmem.h>
39#include <linux/netdevice.h>
40#include <linux/sched/signal.h>
41#include <linux/inetdevice.h>
42
43#include <net/tls.h>
44
45MODULE_AUTHOR("Mellanox Technologies");
46MODULE_DESCRIPTION("Transport Layer Security Support");
47MODULE_LICENSE("Dual BSD/GPL");
48MODULE_ALIAS_TCP_ULP("tls");
49
50enum {
51 TLSV4,
52 TLSV6,
53 TLS_NUM_PROTS,
54};
55
56static struct proto *saved_tcpv6_prot;
57static DEFINE_MUTEX(tcpv6_prot_mutex);
58static struct proto *saved_tcpv4_prot;
59static DEFINE_MUTEX(tcpv4_prot_mutex);
60static LIST_HEAD(device_list);
61static DEFINE_SPINLOCK(device_spinlock);
62static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
63static struct proto_ops tls_sw_proto_ops;
64static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
65 struct proto *base);
66
67static void update_sk_prot(struct sock *sk, struct tls_context *ctx)
68{
69 int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
70
71 sk->sk_prot = &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf];
72}
73
74int wait_on_pending_writer(struct sock *sk, long *timeo)
75{
76 int rc = 0;
77 DEFINE_WAIT_FUNC(wait, woken_wake_function);
78
79 add_wait_queue(sk_sleep(sk), &wait);
80 while (1) {
81 if (!*timeo) {
82 rc = -EAGAIN;
83 break;
84 }
85
86 if (signal_pending(current)) {
87 rc = sock_intr_errno(*timeo);
88 break;
89 }
90
91 if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait))
92 break;
93 }
94 remove_wait_queue(sk_sleep(sk), &wait);
95 return rc;
96}
97
98int tls_push_sg(struct sock *sk,
99 struct tls_context *ctx,
100 struct scatterlist *sg,
101 u16 first_offset,
102 int flags)
103{
104 int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST;
105 int ret = 0;
106 struct page *p;
107 size_t size;
108 int offset = first_offset;
109
110 size = sg->length - offset;
111 offset += sg->offset;
112
113 ctx->in_tcp_sendpages = true;
114 while (1) {
115 if (sg_is_last(sg))
116 sendpage_flags = flags;
117
118
119 tcp_rate_check_app_limited(sk);
120 p = sg_page(sg);
121retry:
122 ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags);
123
124 if (ret != size) {
125 if (ret > 0) {
126 offset += ret;
127 size -= ret;
128 goto retry;
129 }
130
131 offset -= sg->offset;
132 ctx->partially_sent_offset = offset;
133 ctx->partially_sent_record = (void *)sg;
134 ctx->in_tcp_sendpages = false;
135 return ret;
136 }
137
138 put_page(p);
139 sk_mem_uncharge(sk, sg->length);
140 sg = sg_next(sg);
141 if (!sg)
142 break;
143
144 offset = sg->offset;
145 size = sg->length;
146 }
147
148 ctx->in_tcp_sendpages = false;
149
150 return 0;
151}
152
153static int tls_handle_open_record(struct sock *sk, int flags)
154{
155 struct tls_context *ctx = tls_get_ctx(sk);
156
157 if (tls_is_pending_open_record(ctx))
158 return ctx->push_pending_record(sk, flags);
159
160 return 0;
161}
162
163int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
164 unsigned char *record_type)
165{
166 struct cmsghdr *cmsg;
167 int rc = -EINVAL;
168
169 for_each_cmsghdr(cmsg, msg) {
170 if (!CMSG_OK(msg, cmsg))
171 return -EINVAL;
172 if (cmsg->cmsg_level != SOL_TLS)
173 continue;
174
175 switch (cmsg->cmsg_type) {
176 case TLS_SET_RECORD_TYPE:
177 if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type)))
178 return -EINVAL;
179
180 if (msg->msg_flags & MSG_MORE)
181 return -EINVAL;
182
183 rc = tls_handle_open_record(sk, msg->msg_flags);
184 if (rc)
185 return rc;
186
187 *record_type = *(unsigned char *)CMSG_DATA(cmsg);
188 rc = 0;
189 break;
190 default:
191 return -EINVAL;
192 }
193 }
194
195 return rc;
196}
197
198int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
199 int flags)
200{
201 struct scatterlist *sg;
202 u16 offset;
203
204 sg = ctx->partially_sent_record;
205 offset = ctx->partially_sent_offset;
206
207 ctx->partially_sent_record = NULL;
208 return tls_push_sg(sk, ctx, sg, offset, flags);
209}
210
211bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx)
212{
213 struct scatterlist *sg;
214
215 sg = ctx->partially_sent_record;
216 if (!sg)
217 return false;
218
219 while (1) {
220 put_page(sg_page(sg));
221 sk_mem_uncharge(sk, sg->length);
222
223 if (sg_is_last(sg))
224 break;
225 sg++;
226 }
227 ctx->partially_sent_record = NULL;
228 return true;
229}
230
231static void tls_write_space(struct sock *sk)
232{
233 struct tls_context *ctx = tls_get_ctx(sk);
234
235
236
237
238
239 if (ctx->in_tcp_sendpages) {
240 ctx->sk_write_space(sk);
241 return;
242 }
243
244#ifdef CONFIG_TLS_DEVICE
245 if (ctx->tx_conf == TLS_HW)
246 tls_device_write_space(sk, ctx);
247 else
248#endif
249 tls_sw_write_space(sk, ctx);
250
251 ctx->sk_write_space(sk);
252}
253
254void tls_ctx_free(struct tls_context *ctx)
255{
256 if (!ctx)
257 return;
258
259 memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send));
260 memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv));
261 kfree(ctx);
262}
263
264static void tls_sk_proto_cleanup(struct sock *sk,
265 struct tls_context *ctx, long timeo)
266{
267 if (unlikely(sk->sk_write_pending) &&
268 !wait_on_pending_writer(sk, &timeo))
269 tls_handle_open_record(sk, 0);
270
271
272 if (ctx->tx_conf == TLS_SW) {
273 kfree(ctx->tx.rec_seq);
274 kfree(ctx->tx.iv);
275 tls_sw_release_resources_tx(sk);
276#ifdef CONFIG_TLS_DEVICE
277 } else if (ctx->tx_conf == TLS_HW) {
278 tls_device_free_resources_tx(sk);
279#endif
280 }
281
282 if (ctx->rx_conf == TLS_SW)
283 tls_sw_release_resources_rx(sk);
284
285#ifdef CONFIG_TLS_DEVICE
286 if (ctx->rx_conf == TLS_HW)
287 tls_device_offload_cleanup_rx(sk);
288#endif
289}
290
291static void tls_sk_proto_close(struct sock *sk, long timeout)
292{
293 struct inet_connection_sock *icsk = inet_csk(sk);
294 struct tls_context *ctx = tls_get_ctx(sk);
295 long timeo = sock_sndtimeo(sk, 0);
296 bool free_ctx;
297
298 if (ctx->tx_conf == TLS_SW)
299 tls_sw_cancel_work_tx(ctx);
300
301 lock_sock(sk);
302 free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW;
303
304 if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE)
305 tls_sk_proto_cleanup(sk, ctx, timeo);
306
307 write_lock_bh(&sk->sk_callback_lock);
308 if (free_ctx)
309 icsk->icsk_ulp_data = NULL;
310 sk->sk_prot = ctx->sk_proto;
311 if (sk->sk_write_space == tls_write_space)
312 sk->sk_write_space = ctx->sk_write_space;
313 write_unlock_bh(&sk->sk_callback_lock);
314 release_sock(sk);
315 if (ctx->tx_conf == TLS_SW)
316 tls_sw_free_ctx_tx(ctx);
317 if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW)
318 tls_sw_strparser_done(ctx);
319 if (ctx->rx_conf == TLS_SW)
320 tls_sw_free_ctx_rx(ctx);
321 ctx->sk_proto_close(sk, timeout);
322
323 if (free_ctx)
324 tls_ctx_free(ctx);
325}
326
327static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval,
328 int __user *optlen)
329{
330 int rc = 0;
331 struct tls_context *ctx = tls_get_ctx(sk);
332 struct tls_crypto_info *crypto_info;
333 int len;
334
335 if (get_user(len, optlen))
336 return -EFAULT;
337
338 if (!optval || (len < sizeof(*crypto_info))) {
339 rc = -EINVAL;
340 goto out;
341 }
342
343 if (!ctx) {
344 rc = -EBUSY;
345 goto out;
346 }
347
348
349 crypto_info = &ctx->crypto_send.info;
350
351 if (!TLS_CRYPTO_INFO_READY(crypto_info)) {
352 rc = -EBUSY;
353 goto out;
354 }
355
356 if (len == sizeof(*crypto_info)) {
357 if (copy_to_user(optval, crypto_info, sizeof(*crypto_info)))
358 rc = -EFAULT;
359 goto out;
360 }
361
362 switch (crypto_info->cipher_type) {
363 case TLS_CIPHER_AES_GCM_128: {
364 struct tls12_crypto_info_aes_gcm_128 *
365 crypto_info_aes_gcm_128 =
366 container_of(crypto_info,
367 struct tls12_crypto_info_aes_gcm_128,
368 info);
369
370 if (len != sizeof(*crypto_info_aes_gcm_128)) {
371 rc = -EINVAL;
372 goto out;
373 }
374 lock_sock(sk);
375 memcpy(crypto_info_aes_gcm_128->iv,
376 ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
377 TLS_CIPHER_AES_GCM_128_IV_SIZE);
378 memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq,
379 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
380 release_sock(sk);
381 if (copy_to_user(optval,
382 crypto_info_aes_gcm_128,
383 sizeof(*crypto_info_aes_gcm_128)))
384 rc = -EFAULT;
385 break;
386 }
387 case TLS_CIPHER_AES_GCM_256: {
388 struct tls12_crypto_info_aes_gcm_256 *
389 crypto_info_aes_gcm_256 =
390 container_of(crypto_info,
391 struct tls12_crypto_info_aes_gcm_256,
392 info);
393
394 if (len != sizeof(*crypto_info_aes_gcm_256)) {
395 rc = -EINVAL;
396 goto out;
397 }
398 lock_sock(sk);
399 memcpy(crypto_info_aes_gcm_256->iv,
400 ctx->tx.iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE,
401 TLS_CIPHER_AES_GCM_256_IV_SIZE);
402 memcpy(crypto_info_aes_gcm_256->rec_seq, ctx->tx.rec_seq,
403 TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE);
404 release_sock(sk);
405 if (copy_to_user(optval,
406 crypto_info_aes_gcm_256,
407 sizeof(*crypto_info_aes_gcm_256)))
408 rc = -EFAULT;
409 break;
410 }
411 default:
412 rc = -EINVAL;
413 }
414
415out:
416 return rc;
417}
418
419static int do_tls_getsockopt(struct sock *sk, int optname,
420 char __user *optval, int __user *optlen)
421{
422 int rc = 0;
423
424 switch (optname) {
425 case TLS_TX:
426 rc = do_tls_getsockopt_tx(sk, optval, optlen);
427 break;
428 default:
429 rc = -ENOPROTOOPT;
430 break;
431 }
432 return rc;
433}
434
435static int tls_getsockopt(struct sock *sk, int level, int optname,
436 char __user *optval, int __user *optlen)
437{
438 struct tls_context *ctx = tls_get_ctx(sk);
439
440 if (level != SOL_TLS)
441 return ctx->getsockopt(sk, level, optname, optval, optlen);
442
443 return do_tls_getsockopt(sk, optname, optval, optlen);
444}
445
446static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval,
447 unsigned int optlen, int tx)
448{
449 struct tls_crypto_info *crypto_info;
450 struct tls_crypto_info *alt_crypto_info;
451 struct tls_context *ctx = tls_get_ctx(sk);
452 size_t optsize;
453 int rc = 0;
454 int conf;
455
456 if (!optval || (optlen < sizeof(*crypto_info))) {
457 rc = -EINVAL;
458 goto out;
459 }
460
461 if (tx) {
462 crypto_info = &ctx->crypto_send.info;
463 alt_crypto_info = &ctx->crypto_recv.info;
464 } else {
465 crypto_info = &ctx->crypto_recv.info;
466 alt_crypto_info = &ctx->crypto_send.info;
467 }
468
469
470 if (TLS_CRYPTO_INFO_READY(crypto_info)) {
471 rc = -EBUSY;
472 goto out;
473 }
474
475 rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info));
476 if (rc) {
477 rc = -EFAULT;
478 goto err_crypto_info;
479 }
480
481
482 if (crypto_info->version != TLS_1_2_VERSION &&
483 crypto_info->version != TLS_1_3_VERSION) {
484 rc = -ENOTSUPP;
485 goto err_crypto_info;
486 }
487
488
489 if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
490 if (alt_crypto_info->version != crypto_info->version ||
491 alt_crypto_info->cipher_type != crypto_info->cipher_type) {
492 rc = -EINVAL;
493 goto err_crypto_info;
494 }
495 }
496
497 switch (crypto_info->cipher_type) {
498 case TLS_CIPHER_AES_GCM_128:
499 optsize = sizeof(struct tls12_crypto_info_aes_gcm_128);
500 break;
501 case TLS_CIPHER_AES_GCM_256: {
502 optsize = sizeof(struct tls12_crypto_info_aes_gcm_256);
503 break;
504 }
505 case TLS_CIPHER_AES_CCM_128:
506 optsize = sizeof(struct tls12_crypto_info_aes_ccm_128);
507 break;
508 default:
509 rc = -EINVAL;
510 goto err_crypto_info;
511 }
512
513 if (optlen != optsize) {
514 rc = -EINVAL;
515 goto err_crypto_info;
516 }
517
518 rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info),
519 optlen - sizeof(*crypto_info));
520 if (rc) {
521 rc = -EFAULT;
522 goto err_crypto_info;
523 }
524
525 if (tx) {
526#ifdef CONFIG_TLS_DEVICE
527 rc = tls_set_device_offload(sk, ctx);
528 conf = TLS_HW;
529 if (rc) {
530#else
531 {
532#endif
533 rc = tls_set_sw_offload(sk, ctx, 1);
534 if (rc)
535 goto err_crypto_info;
536 conf = TLS_SW;
537 }
538 } else {
539#ifdef CONFIG_TLS_DEVICE
540 rc = tls_set_device_offload_rx(sk, ctx);
541 conf = TLS_HW;
542 if (rc) {
543#else
544 {
545#endif
546 rc = tls_set_sw_offload(sk, ctx, 0);
547 if (rc)
548 goto err_crypto_info;
549 conf = TLS_SW;
550 }
551 tls_sw_strparser_arm(sk, ctx);
552 }
553
554 if (tx)
555 ctx->tx_conf = conf;
556 else
557 ctx->rx_conf = conf;
558 update_sk_prot(sk, ctx);
559 if (tx) {
560 ctx->sk_write_space = sk->sk_write_space;
561 sk->sk_write_space = tls_write_space;
562 } else {
563 sk->sk_socket->ops = &tls_sw_proto_ops;
564 }
565 goto out;
566
567err_crypto_info:
568 memzero_explicit(crypto_info, sizeof(union tls_crypto_context));
569out:
570 return rc;
571}
572
573static int do_tls_setsockopt(struct sock *sk, int optname,
574 char __user *optval, unsigned int optlen)
575{
576 int rc = 0;
577
578 switch (optname) {
579 case TLS_TX:
580 case TLS_RX:
581 lock_sock(sk);
582 rc = do_tls_setsockopt_conf(sk, optval, optlen,
583 optname == TLS_TX);
584 release_sock(sk);
585 break;
586 default:
587 rc = -ENOPROTOOPT;
588 break;
589 }
590 return rc;
591}
592
593static int tls_setsockopt(struct sock *sk, int level, int optname,
594 char __user *optval, unsigned int optlen)
595{
596 struct tls_context *ctx = tls_get_ctx(sk);
597
598 if (level != SOL_TLS)
599 return ctx->setsockopt(sk, level, optname, optval, optlen);
600
601 return do_tls_setsockopt(sk, optname, optval, optlen);
602}
603
604static struct tls_context *create_ctx(struct sock *sk)
605{
606 struct inet_connection_sock *icsk = inet_csk(sk);
607 struct tls_context *ctx;
608
609 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
610 if (!ctx)
611 return NULL;
612
613 icsk->icsk_ulp_data = ctx;
614 ctx->setsockopt = sk->sk_prot->setsockopt;
615 ctx->getsockopt = sk->sk_prot->getsockopt;
616 ctx->sk_proto_close = sk->sk_prot->close;
617 ctx->unhash = sk->sk_prot->unhash;
618 return ctx;
619}
620
621static void tls_build_proto(struct sock *sk)
622{
623 int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
624
625
626 if (ip_ver == TLSV6 &&
627 unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) {
628 mutex_lock(&tcpv6_prot_mutex);
629 if (likely(sk->sk_prot != saved_tcpv6_prot)) {
630 build_protos(tls_prots[TLSV6], sk->sk_prot);
631 smp_store_release(&saved_tcpv6_prot, sk->sk_prot);
632 }
633 mutex_unlock(&tcpv6_prot_mutex);
634 }
635
636 if (ip_ver == TLSV4 &&
637 unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv4_prot))) {
638 mutex_lock(&tcpv4_prot_mutex);
639 if (likely(sk->sk_prot != saved_tcpv4_prot)) {
640 build_protos(tls_prots[TLSV4], sk->sk_prot);
641 smp_store_release(&saved_tcpv4_prot, sk->sk_prot);
642 }
643 mutex_unlock(&tcpv4_prot_mutex);
644 }
645}
646
647static void tls_hw_sk_destruct(struct sock *sk)
648{
649 struct tls_context *ctx = tls_get_ctx(sk);
650 struct inet_connection_sock *icsk = inet_csk(sk);
651
652 ctx->sk_destruct(sk);
653
654 tls_ctx_free(ctx);
655 icsk->icsk_ulp_data = NULL;
656}
657
658static int tls_hw_prot(struct sock *sk)
659{
660 struct tls_context *ctx;
661 struct tls_device *dev;
662 int rc = 0;
663
664 spin_lock_bh(&device_spinlock);
665 list_for_each_entry(dev, &device_list, dev_list) {
666 if (dev->feature && dev->feature(dev)) {
667 ctx = create_ctx(sk);
668 if (!ctx)
669 goto out;
670
671 spin_unlock_bh(&device_spinlock);
672 tls_build_proto(sk);
673 ctx->hash = sk->sk_prot->hash;
674 ctx->unhash = sk->sk_prot->unhash;
675 ctx->sk_proto_close = sk->sk_prot->close;
676 ctx->sk_destruct = sk->sk_destruct;
677 sk->sk_destruct = tls_hw_sk_destruct;
678 ctx->rx_conf = TLS_HW_RECORD;
679 ctx->tx_conf = TLS_HW_RECORD;
680 update_sk_prot(sk, ctx);
681 spin_lock_bh(&device_spinlock);
682 rc = 1;
683 break;
684 }
685 }
686out:
687 spin_unlock_bh(&device_spinlock);
688 return rc;
689}
690
691static void tls_hw_unhash(struct sock *sk)
692{
693 struct tls_context *ctx = tls_get_ctx(sk);
694 struct tls_device *dev;
695
696 spin_lock_bh(&device_spinlock);
697 list_for_each_entry(dev, &device_list, dev_list) {
698 if (dev->unhash) {
699 kref_get(&dev->kref);
700 spin_unlock_bh(&device_spinlock);
701 dev->unhash(dev, sk);
702 kref_put(&dev->kref, dev->release);
703 spin_lock_bh(&device_spinlock);
704 }
705 }
706 spin_unlock_bh(&device_spinlock);
707 ctx->unhash(sk);
708}
709
710static int tls_hw_hash(struct sock *sk)
711{
712 struct tls_context *ctx = tls_get_ctx(sk);
713 struct tls_device *dev;
714 int err;
715
716 err = ctx->hash(sk);
717 spin_lock_bh(&device_spinlock);
718 list_for_each_entry(dev, &device_list, dev_list) {
719 if (dev->hash) {
720 kref_get(&dev->kref);
721 spin_unlock_bh(&device_spinlock);
722 err |= dev->hash(dev, sk);
723 kref_put(&dev->kref, dev->release);
724 spin_lock_bh(&device_spinlock);
725 }
726 }
727 spin_unlock_bh(&device_spinlock);
728
729 if (err)
730 tls_hw_unhash(sk);
731 return err;
732}
733
734static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
735 struct proto *base)
736{
737 prot[TLS_BASE][TLS_BASE] = *base;
738 prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt;
739 prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt;
740 prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close;
741
742 prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
743 prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg;
744 prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage;
745
746 prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE];
747 prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg;
748 prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read;
749 prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close;
750
751 prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE];
752 prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg;
753 prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read;
754 prot[TLS_SW][TLS_SW].close = tls_sk_proto_close;
755
756#ifdef CONFIG_TLS_DEVICE
757 prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
758 prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg;
759 prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage;
760
761 prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW];
762 prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg;
763 prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage;
764
765 prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW];
766
767 prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW];
768
769 prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW];
770#endif
771
772 prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
773 prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_hw_hash;
774 prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_hw_unhash;
775}
776
777static int tls_init(struct sock *sk)
778{
779 struct tls_context *ctx;
780 int rc = 0;
781
782 if (tls_hw_prot(sk))
783 return 0;
784
785
786
787
788
789
790
791 if (sk->sk_state != TCP_ESTABLISHED)
792 return -ENOTSUPP;
793
794 tls_build_proto(sk);
795
796
797 write_lock_bh(&sk->sk_callback_lock);
798 ctx = create_ctx(sk);
799 if (!ctx) {
800 rc = -ENOMEM;
801 goto out;
802 }
803
804 ctx->tx_conf = TLS_BASE;
805 ctx->rx_conf = TLS_BASE;
806 ctx->sk_proto = sk->sk_prot;
807 update_sk_prot(sk, ctx);
808out:
809 write_unlock_bh(&sk->sk_callback_lock);
810 return rc;
811}
812
813static void tls_update(struct sock *sk, struct proto *p)
814{
815 struct tls_context *ctx;
816
817 ctx = tls_get_ctx(sk);
818 if (likely(ctx)) {
819 ctx->sk_proto_close = p->close;
820 ctx->sk_proto = p;
821 } else {
822 sk->sk_prot = p;
823 }
824}
825
826void tls_register_device(struct tls_device *device)
827{
828 spin_lock_bh(&device_spinlock);
829 list_add_tail(&device->dev_list, &device_list);
830 spin_unlock_bh(&device_spinlock);
831}
832EXPORT_SYMBOL(tls_register_device);
833
834void tls_unregister_device(struct tls_device *device)
835{
836 spin_lock_bh(&device_spinlock);
837 list_del(&device->dev_list);
838 spin_unlock_bh(&device_spinlock);
839}
840EXPORT_SYMBOL(tls_unregister_device);
841
842static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = {
843 .name = "tls",
844 .owner = THIS_MODULE,
845 .init = tls_init,
846 .update = tls_update,
847};
848
849static int __init tls_register(void)
850{
851 tls_sw_proto_ops = inet_stream_ops;
852 tls_sw_proto_ops.splice_read = tls_sw_splice_read;
853
854#ifdef CONFIG_TLS_DEVICE
855 tls_device_init();
856#endif
857 tcp_register_ulp(&tcp_tls_ulp_ops);
858
859 return 0;
860}
861
862static void __exit tls_unregister(void)
863{
864 tcp_unregister_ulp(&tcp_tls_ulp_ops);
865#ifdef CONFIG_TLS_DEVICE
866 tls_device_cleanup();
867#endif
868}
869
870module_init(tls_register);
871module_exit(tls_unregister);
872
