2 * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
3 * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/module.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 #include <linux/inet_diag.h>
46 #include <net/tls_toe.h>
48 MODULE_AUTHOR("Mellanox Technologies");
49 MODULE_DESCRIPTION("Transport Layer Security Support");
50 MODULE_LICENSE("Dual BSD/GPL");
51 MODULE_ALIAS_TCP_ULP("tls");
59 static const struct proto *saved_tcpv6_prot;
60 static DEFINE_MUTEX(tcpv6_prot_mutex);
61 static const struct proto *saved_tcpv4_prot;
62 static DEFINE_MUTEX(tcpv4_prot_mutex);
63 static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
64 static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
65 static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
66 const struct proto *base);
68 void update_sk_prot(struct sock *sk, struct tls_context *ctx)
70 int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
72 WRITE_ONCE(sk->sk_prot,
73 &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]);
74 WRITE_ONCE(sk->sk_socket->ops,
75 &tls_proto_ops[ip_ver][ctx->tx_conf][ctx->rx_conf]);
78 int wait_on_pending_writer(struct sock *sk, long *timeo)
81 DEFINE_WAIT_FUNC(wait, woken_wake_function);
83 add_wait_queue(sk_sleep(sk), &wait);
90 if (signal_pending(current)) {
91 rc = sock_intr_errno(*timeo);
95 if (sk_wait_event(sk, timeo,
96 !READ_ONCE(sk->sk_write_pending), &wait))
99 remove_wait_queue(sk_sleep(sk), &wait);
103 int tls_push_sg(struct sock *sk,
104 struct tls_context *ctx,
105 struct scatterlist *sg,
109 int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST;
113 int offset = first_offset;
115 size = sg->length - offset;
116 offset += sg->offset;
118 ctx->in_tcp_sendpages = true;
121 sendpage_flags = flags;
123 /* is sending application-limited? */
124 tcp_rate_check_app_limited(sk);
127 ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags);
136 offset -= sg->offset;
137 ctx->partially_sent_offset = offset;
138 ctx->partially_sent_record = (void *)sg;
139 ctx->in_tcp_sendpages = false;
144 sk_mem_uncharge(sk, sg->length);
153 ctx->in_tcp_sendpages = false;
158 static int tls_handle_open_record(struct sock *sk, int flags)
160 struct tls_context *ctx = tls_get_ctx(sk);
162 if (tls_is_pending_open_record(ctx))
163 return ctx->push_pending_record(sk, flags);
168 int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
169 unsigned char *record_type)
171 struct cmsghdr *cmsg;
174 for_each_cmsghdr(cmsg, msg) {
175 if (!CMSG_OK(msg, cmsg))
177 if (cmsg->cmsg_level != SOL_TLS)
180 switch (cmsg->cmsg_type) {
181 case TLS_SET_RECORD_TYPE:
182 if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type)))
185 if (msg->msg_flags & MSG_MORE)
188 rc = tls_handle_open_record(sk, msg->msg_flags);
192 *record_type = *(unsigned char *)CMSG_DATA(cmsg);
203 int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
206 struct scatterlist *sg;
209 sg = ctx->partially_sent_record;
210 offset = ctx->partially_sent_offset;
212 ctx->partially_sent_record = NULL;
213 return tls_push_sg(sk, ctx, sg, offset, flags);
216 void tls_free_partial_record(struct sock *sk, struct tls_context *ctx)
218 struct scatterlist *sg;
220 for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) {
221 put_page(sg_page(sg));
222 sk_mem_uncharge(sk, sg->length);
224 ctx->partially_sent_record = NULL;
227 static void tls_write_space(struct sock *sk)
229 struct tls_context *ctx = tls_get_ctx(sk);
231 /* If in_tcp_sendpages call lower protocol write space handler
232 * to ensure we wake up any waiting operations there. For example
233 * if do_tcp_sendpages where to call sk_wait_event.
235 if (ctx->in_tcp_sendpages) {
236 ctx->sk_write_space(sk);
240 #ifdef CONFIG_TLS_DEVICE
241 if (ctx->tx_conf == TLS_HW)
242 tls_device_write_space(sk, ctx);
245 tls_sw_write_space(sk, ctx);
247 ctx->sk_write_space(sk);
251 * tls_ctx_free() - free TLS ULP context
252 * @sk: socket to with @ctx is attached
253 * @ctx: TLS context structure
255 * Free TLS context. If @sk is %NULL caller guarantees that the socket
256 * to which @ctx was attached has no outstanding references.
258 void tls_ctx_free(struct sock *sk, struct tls_context *ctx)
263 memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send));
264 memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv));
265 mutex_destroy(&ctx->tx_lock);
273 static void tls_sk_proto_cleanup(struct sock *sk,
274 struct tls_context *ctx, long timeo)
276 if (unlikely(sk->sk_write_pending) &&
277 !wait_on_pending_writer(sk, &timeo))
278 tls_handle_open_record(sk, 0);
280 /* We need these for tls_sw_fallback handling of other packets */
281 if (ctx->tx_conf == TLS_SW) {
282 kfree(ctx->tx.rec_seq);
284 tls_sw_release_resources_tx(sk);
285 TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
286 } else if (ctx->tx_conf == TLS_HW) {
287 tls_device_free_resources_tx(sk);
288 TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
291 if (ctx->rx_conf == TLS_SW) {
292 tls_sw_release_resources_rx(sk);
293 TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW);
294 } else if (ctx->rx_conf == TLS_HW) {
295 tls_device_offload_cleanup_rx(sk);
296 TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
300 static void tls_sk_proto_close(struct sock *sk, long timeout)
302 struct inet_connection_sock *icsk = inet_csk(sk);
303 struct tls_context *ctx = tls_get_ctx(sk);
304 long timeo = sock_sndtimeo(sk, 0);
307 if (ctx->tx_conf == TLS_SW)
308 tls_sw_cancel_work_tx(ctx);
311 free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW;
313 if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE)
314 tls_sk_proto_cleanup(sk, ctx, timeo);
316 write_lock_bh(&sk->sk_callback_lock);
318 rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
319 WRITE_ONCE(sk->sk_prot, ctx->sk_proto);
320 if (sk->sk_write_space == tls_write_space)
321 sk->sk_write_space = ctx->sk_write_space;
322 write_unlock_bh(&sk->sk_callback_lock);
324 if (ctx->tx_conf == TLS_SW)
325 tls_sw_free_ctx_tx(ctx);
326 if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW)
327 tls_sw_strparser_done(ctx);
328 if (ctx->rx_conf == TLS_SW)
329 tls_sw_free_ctx_rx(ctx);
330 ctx->sk_proto->close(sk, timeout);
333 tls_ctx_free(sk, ctx);
336 static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval,
337 int __user *optlen, int tx)
340 struct tls_context *ctx = tls_get_ctx(sk);
341 struct tls_crypto_info *crypto_info;
342 struct cipher_context *cctx;
345 if (get_user(len, optlen))
348 if (!optval || (len < sizeof(*crypto_info))) {
358 /* get user crypto info */
360 crypto_info = &ctx->crypto_send.info;
363 crypto_info = &ctx->crypto_recv.info;
367 if (!TLS_CRYPTO_INFO_READY(crypto_info)) {
372 if (len == sizeof(*crypto_info)) {
373 if (copy_to_user(optval, crypto_info, sizeof(*crypto_info)))
378 switch (crypto_info->cipher_type) {
379 case TLS_CIPHER_AES_GCM_128: {
380 struct tls12_crypto_info_aes_gcm_128 *
381 crypto_info_aes_gcm_128 =
382 container_of(crypto_info,
383 struct tls12_crypto_info_aes_gcm_128,
386 if (len != sizeof(*crypto_info_aes_gcm_128)) {
390 memcpy(crypto_info_aes_gcm_128->iv,
391 cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
392 TLS_CIPHER_AES_GCM_128_IV_SIZE);
393 memcpy(crypto_info_aes_gcm_128->rec_seq, cctx->rec_seq,
394 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
395 if (copy_to_user(optval,
396 crypto_info_aes_gcm_128,
397 sizeof(*crypto_info_aes_gcm_128)))
401 case TLS_CIPHER_AES_GCM_256: {
402 struct tls12_crypto_info_aes_gcm_256 *
403 crypto_info_aes_gcm_256 =
404 container_of(crypto_info,
405 struct tls12_crypto_info_aes_gcm_256,
408 if (len != sizeof(*crypto_info_aes_gcm_256)) {
412 memcpy(crypto_info_aes_gcm_256->iv,
413 cctx->iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE,
414 TLS_CIPHER_AES_GCM_256_IV_SIZE);
415 memcpy(crypto_info_aes_gcm_256->rec_seq, cctx->rec_seq,
416 TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE);
417 if (copy_to_user(optval,
418 crypto_info_aes_gcm_256,
419 sizeof(*crypto_info_aes_gcm_256)))
431 static int do_tls_getsockopt(struct sock *sk, int optname,
432 char __user *optval, int __user *optlen)
441 rc = do_tls_getsockopt_conf(sk, optval, optlen,
454 static int tls_getsockopt(struct sock *sk, int level, int optname,
455 char __user *optval, int __user *optlen)
457 struct tls_context *ctx = tls_get_ctx(sk);
459 if (level != SOL_TLS)
460 return ctx->sk_proto->getsockopt(sk, level,
461 optname, optval, optlen);
463 return do_tls_getsockopt(sk, optname, optval, optlen);
466 static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
467 unsigned int optlen, int tx)
469 struct tls_crypto_info *crypto_info;
470 struct tls_crypto_info *alt_crypto_info;
471 struct tls_context *ctx = tls_get_ctx(sk);
476 if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info))) {
482 crypto_info = &ctx->crypto_send.info;
483 alt_crypto_info = &ctx->crypto_recv.info;
485 crypto_info = &ctx->crypto_recv.info;
486 alt_crypto_info = &ctx->crypto_send.info;
489 /* Currently we don't support set crypto info more than one time */
490 if (TLS_CRYPTO_INFO_READY(crypto_info)) {
495 rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info));
498 goto err_crypto_info;
502 if (crypto_info->version != TLS_1_2_VERSION &&
503 crypto_info->version != TLS_1_3_VERSION) {
505 goto err_crypto_info;
508 /* Ensure that TLS version and ciphers are same in both directions */
509 if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
510 if (alt_crypto_info->version != crypto_info->version ||
511 alt_crypto_info->cipher_type != crypto_info->cipher_type) {
513 goto err_crypto_info;
517 switch (crypto_info->cipher_type) {
518 case TLS_CIPHER_AES_GCM_128:
519 optsize = sizeof(struct tls12_crypto_info_aes_gcm_128);
521 case TLS_CIPHER_AES_GCM_256: {
522 optsize = sizeof(struct tls12_crypto_info_aes_gcm_256);
525 case TLS_CIPHER_AES_CCM_128:
526 optsize = sizeof(struct tls12_crypto_info_aes_ccm_128);
528 case TLS_CIPHER_CHACHA20_POLY1305:
529 optsize = sizeof(struct tls12_crypto_info_chacha20_poly1305);
533 goto err_crypto_info;
536 if (optlen != optsize) {
538 goto err_crypto_info;
541 rc = copy_from_sockptr_offset(crypto_info + 1, optval,
542 sizeof(*crypto_info),
543 optlen - sizeof(*crypto_info));
546 goto err_crypto_info;
550 rc = tls_set_device_offload(sk, ctx);
553 TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE);
554 TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
556 rc = tls_set_sw_offload(sk, ctx, 1);
558 goto err_crypto_info;
559 TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW);
560 TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
564 rc = tls_set_device_offload_rx(sk, ctx);
567 TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE);
568 TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
570 rc = tls_set_sw_offload(sk, ctx, 0);
572 goto err_crypto_info;
573 TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW);
574 TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW);
577 tls_sw_strparser_arm(sk, ctx);
584 update_sk_prot(sk, ctx);
586 ctx->sk_write_space = sk->sk_write_space;
587 sk->sk_write_space = tls_write_space;
592 memzero_explicit(crypto_info, sizeof(union tls_crypto_context));
597 static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval,
606 rc = do_tls_setsockopt_conf(sk, optval, optlen,
617 static int tls_setsockopt(struct sock *sk, int level, int optname,
618 sockptr_t optval, unsigned int optlen)
620 struct tls_context *ctx = tls_get_ctx(sk);
622 if (level != SOL_TLS)
623 return ctx->sk_proto->setsockopt(sk, level, optname, optval,
626 return do_tls_setsockopt(sk, optname, optval, optlen);
629 struct tls_context *tls_ctx_create(struct sock *sk)
631 struct inet_connection_sock *icsk = inet_csk(sk);
632 struct tls_context *ctx;
634 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
638 mutex_init(&ctx->tx_lock);
639 rcu_assign_pointer(icsk->icsk_ulp_data, ctx);
640 ctx->sk_proto = READ_ONCE(sk->sk_prot);
645 static void build_proto_ops(struct proto_ops ops[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
646 const struct proto_ops *base)
648 ops[TLS_BASE][TLS_BASE] = *base;
650 ops[TLS_SW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE];
651 ops[TLS_SW ][TLS_BASE].sendpage_locked = tls_sw_sendpage_locked;
653 ops[TLS_BASE][TLS_SW ] = ops[TLS_BASE][TLS_BASE];
654 ops[TLS_BASE][TLS_SW ].splice_read = tls_sw_splice_read;
656 ops[TLS_SW ][TLS_SW ] = ops[TLS_SW ][TLS_BASE];
657 ops[TLS_SW ][TLS_SW ].splice_read = tls_sw_splice_read;
659 #ifdef CONFIG_TLS_DEVICE
660 ops[TLS_HW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE];
661 ops[TLS_HW ][TLS_BASE].sendpage_locked = NULL;
663 ops[TLS_HW ][TLS_SW ] = ops[TLS_BASE][TLS_SW ];
664 ops[TLS_HW ][TLS_SW ].sendpage_locked = NULL;
666 ops[TLS_BASE][TLS_HW ] = ops[TLS_BASE][TLS_SW ];
668 ops[TLS_SW ][TLS_HW ] = ops[TLS_SW ][TLS_SW ];
670 ops[TLS_HW ][TLS_HW ] = ops[TLS_HW ][TLS_SW ];
671 ops[TLS_HW ][TLS_HW ].sendpage_locked = NULL;
673 #ifdef CONFIG_TLS_TOE
674 ops[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
678 static void tls_build_proto(struct sock *sk)
680 int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
681 struct proto *prot = READ_ONCE(sk->sk_prot);
683 /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */
684 if (ip_ver == TLSV6 &&
685 unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) {
686 mutex_lock(&tcpv6_prot_mutex);
687 if (likely(prot != saved_tcpv6_prot)) {
688 build_protos(tls_prots[TLSV6], prot);
689 build_proto_ops(tls_proto_ops[TLSV6],
691 smp_store_release(&saved_tcpv6_prot, prot);
693 mutex_unlock(&tcpv6_prot_mutex);
696 if (ip_ver == TLSV4 &&
697 unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) {
698 mutex_lock(&tcpv4_prot_mutex);
699 if (likely(prot != saved_tcpv4_prot)) {
700 build_protos(tls_prots[TLSV4], prot);
701 build_proto_ops(tls_proto_ops[TLSV4],
703 smp_store_release(&saved_tcpv4_prot, prot);
705 mutex_unlock(&tcpv4_prot_mutex);
709 static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
710 const struct proto *base)
712 prot[TLS_BASE][TLS_BASE] = *base;
713 prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt;
714 prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt;
715 prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close;
717 prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
718 prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg;
719 prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage;
721 prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE];
722 prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg;
723 prot[TLS_BASE][TLS_SW].sock_is_readable = tls_sw_sock_is_readable;
724 prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close;
726 prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE];
727 prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg;
728 prot[TLS_SW][TLS_SW].sock_is_readable = tls_sw_sock_is_readable;
729 prot[TLS_SW][TLS_SW].close = tls_sk_proto_close;
731 #ifdef CONFIG_TLS_DEVICE
732 prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
733 prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg;
734 prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage;
736 prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW];
737 prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg;
738 prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage;
740 prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW];
742 prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW];
744 prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW];
746 #ifdef CONFIG_TLS_TOE
747 prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
748 prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_toe_hash;
749 prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_toe_unhash;
753 static int tls_init(struct sock *sk)
755 struct tls_context *ctx;
760 #ifdef CONFIG_TLS_TOE
761 if (tls_toe_bypass(sk))
765 /* The TLS ulp is currently supported only for TCP sockets
766 * in ESTABLISHED state.
767 * Supporting sockets in LISTEN state will require us
768 * to modify the accept implementation to clone rather then
769 * share the ulp context.
771 if (sk->sk_state != TCP_ESTABLISHED)
774 /* allocate tls context */
775 write_lock_bh(&sk->sk_callback_lock);
776 ctx = tls_ctx_create(sk);
782 ctx->tx_conf = TLS_BASE;
783 ctx->rx_conf = TLS_BASE;
784 update_sk_prot(sk, ctx);
786 write_unlock_bh(&sk->sk_callback_lock);
790 static void tls_update(struct sock *sk, struct proto *p,
791 void (*write_space)(struct sock *sk))
793 struct tls_context *ctx;
795 WARN_ON_ONCE(sk->sk_prot == p);
797 ctx = tls_get_ctx(sk);
799 ctx->sk_write_space = write_space;
802 /* Pairs with lockless read in sk_clone_lock(). */
803 WRITE_ONCE(sk->sk_prot, p);
804 sk->sk_write_space = write_space;
808 static int tls_get_info(const struct sock *sk, struct sk_buff *skb)
810 u16 version, cipher_type;
811 struct tls_context *ctx;
812 struct nlattr *start;
815 start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS);
820 ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data);
825 version = ctx->prot_info.version;
827 err = nla_put_u16(skb, TLS_INFO_VERSION, version);
831 cipher_type = ctx->prot_info.cipher_type;
833 err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type);
837 err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true));
841 err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false));
846 nla_nest_end(skb, start);
851 nla_nest_cancel(skb, start);
855 static size_t tls_get_info_size(const struct sock *sk)
859 size += nla_total_size(0) + /* INET_ULP_INFO_TLS */
860 nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */
861 nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */
862 nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */
863 nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */
869 static int __net_init tls_init_net(struct net *net)
873 net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib);
874 if (!net->mib.tls_statistics)
877 err = tls_proc_init(net);
883 free_percpu(net->mib.tls_statistics);
887 static void __net_exit tls_exit_net(struct net *net)
890 free_percpu(net->mib.tls_statistics);
893 static struct pernet_operations tls_proc_ops = {
894 .init = tls_init_net,
895 .exit = tls_exit_net,
898 static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = {
900 .owner = THIS_MODULE,
902 .update = tls_update,
903 .get_info = tls_get_info,
904 .get_info_size = tls_get_info_size,
907 static int __init tls_register(void)
911 err = register_pernet_subsys(&tls_proc_ops);
915 err = tls_device_init();
917 unregister_pernet_subsys(&tls_proc_ops);
921 tcp_register_ulp(&tcp_tls_ulp_ops);
926 static void __exit tls_unregister(void)
928 tcp_unregister_ulp(&tcp_tls_ulp_ops);
929 tls_device_cleanup();
930 unregister_pernet_subsys(&tls_proc_ops);
933 module_init(tls_register);
934 module_exit(tls_unregister);