net/tls/tls_main.c

   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 #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 #include <linux/inet_diag.h>
  43
  44 #include <net/snmp.h>
  45 #include <net/tls.h>
  46 #include <net/tls_toe.h>
  47
  48 #include "tls.h"
  49
  50 MODULE_AUTHOR("Mellanox Technologies");
  51 MODULE_DESCRIPTION("Transport Layer Security Support");
  52 MODULE_LICENSE("Dual BSD/GPL");
  53 MODULE_ALIAS_TCP_ULP("tls");
  54
  55 enum {
  56         TLSV4,
  57         TLSV6,
  58         TLS_NUM_PROTS,
  59 };
  60
  61 #define CIPHER_SIZE_DESC(cipher) [cipher] = { \
  62         .iv = cipher ## _IV_SIZE, \
  63         .key = cipher ## _KEY_SIZE, \
  64         .salt = cipher ## _SALT_SIZE, \
  65         .tag = cipher ## _TAG_SIZE, \
  66         .rec_seq = cipher ## _REC_SEQ_SIZE, \
  67 }
  68
  69 const struct tls_cipher_size_desc tls_cipher_size_desc[] = {
  70         CIPHER_SIZE_DESC(TLS_CIPHER_AES_GCM_128),
  71         CIPHER_SIZE_DESC(TLS_CIPHER_AES_GCM_256),
  72         CIPHER_SIZE_DESC(TLS_CIPHER_AES_CCM_128),
  73         CIPHER_SIZE_DESC(TLS_CIPHER_CHACHA20_POLY1305),
  74         CIPHER_SIZE_DESC(TLS_CIPHER_SM4_GCM),
  75         CIPHER_SIZE_DESC(TLS_CIPHER_SM4_CCM),
  76 };
  77
  78 static const struct proto *saved_tcpv6_prot;
  79 static DEFINE_MUTEX(tcpv6_prot_mutex);
  80 static const struct proto *saved_tcpv4_prot;
  81 static DEFINE_MUTEX(tcpv4_prot_mutex);
  82 static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
  83 static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
  84 static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
  85                          const struct proto *base);
  86
  87 void update_sk_prot(struct sock *sk, struct tls_context *ctx)
  88 {
  89         int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
  90
  91         WRITE_ONCE(sk->sk_prot,
  92                    &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]);
  93         WRITE_ONCE(sk->sk_socket->ops,
  94                    &tls_proto_ops[ip_ver][ctx->tx_conf][ctx->rx_conf]);
  95 }
  96
  97 int wait_on_pending_writer(struct sock *sk, long *timeo)
  98 {
  99         int rc = 0;
 100         DEFINE_WAIT_FUNC(wait, woken_wake_function);
 101
 102         add_wait_queue(sk_sleep(sk), &wait);
 103         while (1) {
 104                 if (!*timeo) {
 105                         rc = -EAGAIN;
 106                         break;
 107                 }
 108
 109                 if (signal_pending(current)) {
 110                         rc = sock_intr_errno(*timeo);
 111                         break;
 112                 }
 113
 114                 if (sk_wait_event(sk, timeo,
 115                                   !READ_ONCE(sk->sk_write_pending), &wait))
 116                         break;
 117         }
 118         remove_wait_queue(sk_sleep(sk), &wait);
 119         return rc;
 120 }
 121
 122 int tls_push_sg(struct sock *sk,
 123                 struct tls_context *ctx,
 124                 struct scatterlist *sg,
 125                 u16 first_offset,
 126                 int flags)
 127 {
 128         struct bio_vec bvec;
 129         struct msghdr msg = {
 130                 .msg_flags = MSG_SENDPAGE_NOTLAST | MSG_SPLICE_PAGES | flags,
 131         };
 132         int ret = 0;
 133         struct page *p;
 134         size_t size;
 135         int offset = first_offset;
 136
 137         size = sg->length - offset;
 138         offset += sg->offset;
 139
 140         ctx->splicing_pages = true;
 141         while (1) {
 142                 if (sg_is_last(sg))
 143                         msg.msg_flags = flags;
 144
 145                 /* is sending application-limited? */
 146                 tcp_rate_check_app_limited(sk);
 147                 p = sg_page(sg);
 148 retry:
 149                 bvec_set_page(&bvec, p, size, offset);
 150                 iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size);
 151
 152                 ret = tcp_sendmsg_locked(sk, &msg, size);
 153
 154                 if (ret != size) {
 155                         if (ret > 0) {
 156                                 offset += ret;
 157                                 size -= ret;
 158                                 goto retry;
 159                         }
 160
 161                         offset -= sg->offset;
 162                         ctx->partially_sent_offset = offset;
 163                         ctx->partially_sent_record = (void *)sg;
 164                         ctx->splicing_pages = false;
 165                         return ret;
 166                 }
 167
 168                 put_page(p);
 169                 sk_mem_uncharge(sk, sg->length);
 170                 sg = sg_next(sg);
 171                 if (!sg)
 172                         break;
 173
 174                 offset = sg->offset;
 175                 size = sg->length;
 176         }
 177
 178         ctx->splicing_pages = false;
 179
 180         return 0;
 181 }
 182
 183 static int tls_handle_open_record(struct sock *sk, int flags)
 184 {
 185         struct tls_context *ctx = tls_get_ctx(sk);
 186
 187         if (tls_is_pending_open_record(ctx))
 188                 return ctx->push_pending_record(sk, flags);
 189
 190         return 0;
 191 }
 192
 193 int tls_process_cmsg(struct sock *sk, struct msghdr *msg,
 194                      unsigned char *record_type)
 195 {
 196         struct cmsghdr *cmsg;
 197         int rc = -EINVAL;
 198
 199         for_each_cmsghdr(cmsg, msg) {
 200                 if (!CMSG_OK(msg, cmsg))
 201                         return -EINVAL;
 202                 if (cmsg->cmsg_level != SOL_TLS)
 203                         continue;
 204
 205                 switch (cmsg->cmsg_type) {
 206                 case TLS_SET_RECORD_TYPE:
 207                         if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type)))
 208                                 return -EINVAL;
 209
 210                         if (msg->msg_flags & MSG_MORE)
 211                                 return -EINVAL;
 212
 213                         rc = tls_handle_open_record(sk, msg->msg_flags);
 214                         if (rc)
 215                                 return rc;
 216
 217                         *record_type = *(unsigned char *)CMSG_DATA(cmsg);
 218                         rc = 0;
 219                         break;
 220                 default:
 221                         return -EINVAL;
 222                 }
 223         }
 224
 225         return rc;
 226 }
 227
 228 int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
 229                             int flags)
 230 {
 231         struct scatterlist *sg;
 232         u16 offset;
 233
 234         sg = ctx->partially_sent_record;
 235         offset = ctx->partially_sent_offset;
 236
 237         ctx->partially_sent_record = NULL;
 238         return tls_push_sg(sk, ctx, sg, offset, flags);
 239 }
 240
 241 void tls_free_partial_record(struct sock *sk, struct tls_context *ctx)
 242 {
 243         struct scatterlist *sg;
 244
 245         for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) {
 246                 put_page(sg_page(sg));
 247                 sk_mem_uncharge(sk, sg->length);
 248         }
 249         ctx->partially_sent_record = NULL;
 250 }
 251
 252 static void tls_write_space(struct sock *sk)
 253 {
 254         struct tls_context *ctx = tls_get_ctx(sk);
 255
 256         /* If splicing_pages call lower protocol write space handler
 257          * to ensure we wake up any waiting operations there. For example
 258          * if splicing pages where to call sk_wait_event.
 259          */
 260         if (ctx->splicing_pages) {
 261                 ctx->sk_write_space(sk);
 262                 return;
 263         }
 264
 265 #ifdef CONFIG_TLS_DEVICE
 266         if (ctx->tx_conf == TLS_HW)
 267                 tls_device_write_space(sk, ctx);
 268         else
 269 #endif
 270                 tls_sw_write_space(sk, ctx);
 271
 272         ctx->sk_write_space(sk);
 273 }
 274
 275 /**
 276  * tls_ctx_free() - free TLS ULP context
 277  * @sk:  socket to with @ctx is attached
 278  * @ctx: TLS context structure
 279  *
 280  * Free TLS context. If @sk is %NULL caller guarantees that the socket
 281  * to which @ctx was attached has no outstanding references.
 282  */
 283 void tls_ctx_free(struct sock *sk, struct tls_context *ctx)
 284 {
 285         if (!ctx)
 286                 return;
 287
 288         memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send));
 289         memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv));
 290         mutex_destroy(&ctx->tx_lock);
 291
 292         if (sk)
 293                 kfree_rcu(ctx, rcu);
 294         else
 295                 kfree(ctx);
 296 }
 297
 298 static void tls_sk_proto_cleanup(struct sock *sk,
 299                                  struct tls_context *ctx, long timeo)
 300 {
 301         if (unlikely(sk->sk_write_pending) &&
 302             !wait_on_pending_writer(sk, &timeo))
 303                 tls_handle_open_record(sk, 0);
 304
 305         /* We need these for tls_sw_fallback handling of other packets */
 306         if (ctx->tx_conf == TLS_SW) {
 307                 kfree(ctx->tx.rec_seq);
 308                 kfree(ctx->tx.iv);
 309                 tls_sw_release_resources_tx(sk);
 310                 TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
 311         } else if (ctx->tx_conf == TLS_HW) {
 312                 tls_device_free_resources_tx(sk);
 313                 TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
 314         }
 315
 316         if (ctx->rx_conf == TLS_SW) {
 317                 tls_sw_release_resources_rx(sk);
 318                 TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW);
 319         } else if (ctx->rx_conf == TLS_HW) {
 320                 tls_device_offload_cleanup_rx(sk);
 321                 TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
 322         }
 323 }
 324
 325 static void tls_sk_proto_close(struct sock *sk, long timeout)
 326 {
 327         struct inet_connection_sock *icsk = inet_csk(sk);
 328         struct tls_context *ctx = tls_get_ctx(sk);
 329         long timeo = sock_sndtimeo(sk, 0);
 330         bool free_ctx;
 331
 332         if (ctx->tx_conf == TLS_SW)
 333                 tls_sw_cancel_work_tx(ctx);
 334
 335         lock_sock(sk);
 336         free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW;
 337
 338         if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE)
 339                 tls_sk_proto_cleanup(sk, ctx, timeo);
 340
 341         write_lock_bh(&sk->sk_callback_lock);
 342         if (free_ctx)
 343                 rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
 344         WRITE_ONCE(sk->sk_prot, ctx->sk_proto);
 345         if (sk->sk_write_space == tls_write_space)
 346                 sk->sk_write_space = ctx->sk_write_space;
 347         write_unlock_bh(&sk->sk_callback_lock);
 348         release_sock(sk);
 349         if (ctx->tx_conf == TLS_SW)
 350                 tls_sw_free_ctx_tx(ctx);
 351         if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW)
 352                 tls_sw_strparser_done(ctx);
 353         if (ctx->rx_conf == TLS_SW)
 354                 tls_sw_free_ctx_rx(ctx);
 355         ctx->sk_proto->close(sk, timeout);
 356
 357         if (free_ctx)
 358                 tls_ctx_free(sk, ctx);
 359 }
 360
 361 static __poll_t tls_sk_poll(struct file *file, struct socket *sock,
 362                             struct poll_table_struct *wait)
 363 {
 364         struct tls_sw_context_rx *ctx;
 365         struct tls_context *tls_ctx;
 366         struct sock *sk = sock->sk;
 367         struct sk_psock *psock;
 368         __poll_t mask = 0;
 369         u8 shutdown;
 370         int state;
 371
 372         mask = tcp_poll(file, sock, wait);
 373
 374         state = inet_sk_state_load(sk);
 375         shutdown = READ_ONCE(sk->sk_shutdown);
 376         if (unlikely(state != TCP_ESTABLISHED || shutdown & RCV_SHUTDOWN))
 377                 return mask;
 378
 379         tls_ctx = tls_get_ctx(sk);
 380         ctx = tls_sw_ctx_rx(tls_ctx);
 381         psock = sk_psock_get(sk);
 382
 383         if (skb_queue_empty_lockless(&ctx->rx_list) &&
 384             !tls_strp_msg_ready(ctx) &&
 385             sk_psock_queue_empty(psock))
 386                 mask &= ~(EPOLLIN | EPOLLRDNORM);
 387
 388         if (psock)
 389                 sk_psock_put(sk, psock);
 390
 391         return mask;
 392 }
 393
 394 static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval,
 395                                   int __user *optlen, int tx)
 396 {
 397         int rc = 0;
 398         struct tls_context *ctx = tls_get_ctx(sk);
 399         struct tls_crypto_info *crypto_info;
 400         struct cipher_context *cctx;
 401         int len;
 402
 403         if (get_user(len, optlen))
 404                 return -EFAULT;
 405
 406         if (!optval || (len < sizeof(*crypto_info))) {
 407                 rc = -EINVAL;
 408                 goto out;
 409         }
 410
 411         if (!ctx) {
 412                 rc = -EBUSY;
 413                 goto out;
 414         }
 415
 416         /* get user crypto info */
 417         if (tx) {
 418                 crypto_info = &ctx->crypto_send.info;
 419                 cctx = &ctx->tx;
 420         } else {
 421                 crypto_info = &ctx->crypto_recv.info;
 422                 cctx = &ctx->rx;
 423         }
 424
 425         if (!TLS_CRYPTO_INFO_READY(crypto_info)) {
 426                 rc = -EBUSY;
 427                 goto out;
 428         }
 429
 430         if (len == sizeof(*crypto_info)) {
 431                 if (copy_to_user(optval, crypto_info, sizeof(*crypto_info)))
 432                         rc = -EFAULT;
 433                 goto out;
 434         }
 435
 436         switch (crypto_info->cipher_type) {
 437         case TLS_CIPHER_AES_GCM_128: {
 438                 struct tls12_crypto_info_aes_gcm_128 *
 439                   crypto_info_aes_gcm_128 =
 440                   container_of(crypto_info,
 441                                struct tls12_crypto_info_aes_gcm_128,
 442                                info);
 443
 444                 if (len != sizeof(*crypto_info_aes_gcm_128)) {
 445                         rc = -EINVAL;
 446                         goto out;
 447                 }
 448                 memcpy(crypto_info_aes_gcm_128->iv,
 449                        cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
 450                        TLS_CIPHER_AES_GCM_128_IV_SIZE);
 451                 memcpy(crypto_info_aes_gcm_128->rec_seq, cctx->rec_seq,
 452                        TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
 453                 if (copy_to_user(optval,
 454                                  crypto_info_aes_gcm_128,
 455                                  sizeof(*crypto_info_aes_gcm_128)))
 456                         rc = -EFAULT;
 457                 break;
 458         }
 459         case TLS_CIPHER_AES_GCM_256: {
 460                 struct tls12_crypto_info_aes_gcm_256 *
 461                   crypto_info_aes_gcm_256 =
 462                   container_of(crypto_info,
 463                                struct tls12_crypto_info_aes_gcm_256,
 464                                info);
 465
 466                 if (len != sizeof(*crypto_info_aes_gcm_256)) {
 467                         rc = -EINVAL;
 468                         goto out;
 469                 }
 470                 memcpy(crypto_info_aes_gcm_256->iv,
 471                        cctx->iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE,
 472                        TLS_CIPHER_AES_GCM_256_IV_SIZE);
 473                 memcpy(crypto_info_aes_gcm_256->rec_seq, cctx->rec_seq,
 474                        TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE);
 475                 if (copy_to_user(optval,
 476                                  crypto_info_aes_gcm_256,
 477                                  sizeof(*crypto_info_aes_gcm_256)))
 478                         rc = -EFAULT;
 479                 break;
 480         }
 481         case TLS_CIPHER_AES_CCM_128: {
 482                 struct tls12_crypto_info_aes_ccm_128 *aes_ccm_128 =
 483                         container_of(crypto_info,
 484                                 struct tls12_crypto_info_aes_ccm_128, info);
 485
 486                 if (len != sizeof(*aes_ccm_128)) {
 487                         rc = -EINVAL;
 488                         goto out;
 489                 }
 490                 memcpy(aes_ccm_128->iv,
 491                        cctx->iv + TLS_CIPHER_AES_CCM_128_SALT_SIZE,
 492                        TLS_CIPHER_AES_CCM_128_IV_SIZE);
 493                 memcpy(aes_ccm_128->rec_seq, cctx->rec_seq,
 494                        TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE);
 495                 if (copy_to_user(optval, aes_ccm_128, sizeof(*aes_ccm_128)))
 496                         rc = -EFAULT;
 497                 break;
 498         }
 499         case TLS_CIPHER_CHACHA20_POLY1305: {
 500                 struct tls12_crypto_info_chacha20_poly1305 *chacha20_poly1305 =
 501                         container_of(crypto_info,
 502                                 struct tls12_crypto_info_chacha20_poly1305,
 503                                 info);
 504
 505                 if (len != sizeof(*chacha20_poly1305)) {
 506                         rc = -EINVAL;
 507                         goto out;
 508                 }
 509                 memcpy(chacha20_poly1305->iv,
 510                        cctx->iv + TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE,
 511                        TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE);
 512                 memcpy(chacha20_poly1305->rec_seq, cctx->rec_seq,
 513                        TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE);
 514                 if (copy_to_user(optval, chacha20_poly1305,
 515                                 sizeof(*chacha20_poly1305)))
 516                         rc = -EFAULT;
 517                 break;
 518         }
 519         case TLS_CIPHER_SM4_GCM: {
 520                 struct tls12_crypto_info_sm4_gcm *sm4_gcm_info =
 521                         container_of(crypto_info,
 522                                 struct tls12_crypto_info_sm4_gcm, info);
 523
 524                 if (len != sizeof(*sm4_gcm_info)) {
 525                         rc = -EINVAL;
 526                         goto out;
 527                 }
 528                 memcpy(sm4_gcm_info->iv,
 529                        cctx->iv + TLS_CIPHER_SM4_GCM_SALT_SIZE,
 530                        TLS_CIPHER_SM4_GCM_IV_SIZE);
 531                 memcpy(sm4_gcm_info->rec_seq, cctx->rec_seq,
 532                        TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE);
 533                 if (copy_to_user(optval, sm4_gcm_info, sizeof(*sm4_gcm_info)))
 534                         rc = -EFAULT;
 535                 break;
 536         }
 537         case TLS_CIPHER_SM4_CCM: {
 538                 struct tls12_crypto_info_sm4_ccm *sm4_ccm_info =
 539                         container_of(crypto_info,
 540                                 struct tls12_crypto_info_sm4_ccm, info);
 541
 542                 if (len != sizeof(*sm4_ccm_info)) {
 543                         rc = -EINVAL;
 544                         goto out;
 545                 }
 546                 memcpy(sm4_ccm_info->iv,
 547                        cctx->iv + TLS_CIPHER_SM4_CCM_SALT_SIZE,
 548                        TLS_CIPHER_SM4_CCM_IV_SIZE);
 549                 memcpy(sm4_ccm_info->rec_seq, cctx->rec_seq,
 550                        TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE);
 551                 if (copy_to_user(optval, sm4_ccm_info, sizeof(*sm4_ccm_info)))
 552                         rc = -EFAULT;
 553                 break;
 554         }
 555         case TLS_CIPHER_ARIA_GCM_128: {
 556                 struct tls12_crypto_info_aria_gcm_128 *
 557                   crypto_info_aria_gcm_128 =
 558                   container_of(crypto_info,
 559                                struct tls12_crypto_info_aria_gcm_128,
 560                                info);
 561
 562                 if (len != sizeof(*crypto_info_aria_gcm_128)) {
 563                         rc = -EINVAL;
 564                         goto out;
 565                 }
 566                 memcpy(crypto_info_aria_gcm_128->iv,
 567                        cctx->iv + TLS_CIPHER_ARIA_GCM_128_SALT_SIZE,
 568                        TLS_CIPHER_ARIA_GCM_128_IV_SIZE);
 569                 memcpy(crypto_info_aria_gcm_128->rec_seq, cctx->rec_seq,
 570                        TLS_CIPHER_ARIA_GCM_128_REC_SEQ_SIZE);
 571                 if (copy_to_user(optval,
 572                                  crypto_info_aria_gcm_128,
 573                                  sizeof(*crypto_info_aria_gcm_128)))
 574                         rc = -EFAULT;
 575                 break;
 576         }
 577         case TLS_CIPHER_ARIA_GCM_256: {
 578                 struct tls12_crypto_info_aria_gcm_256 *
 579                   crypto_info_aria_gcm_256 =
 580                   container_of(crypto_info,
 581                                struct tls12_crypto_info_aria_gcm_256,
 582                                info);
 583
 584                 if (len != sizeof(*crypto_info_aria_gcm_256)) {
 585                         rc = -EINVAL;
 586                         goto out;
 587                 }
 588                 memcpy(crypto_info_aria_gcm_256->iv,
 589                        cctx->iv + TLS_CIPHER_ARIA_GCM_256_SALT_SIZE,
 590                        TLS_CIPHER_ARIA_GCM_256_IV_SIZE);
 591                 memcpy(crypto_info_aria_gcm_256->rec_seq, cctx->rec_seq,
 592                        TLS_CIPHER_ARIA_GCM_256_REC_SEQ_SIZE);
 593                 if (copy_to_user(optval,
 594                                  crypto_info_aria_gcm_256,
 595                                  sizeof(*crypto_info_aria_gcm_256)))
 596                         rc = -EFAULT;
 597                 break;
 598         }
 599         default:
 600                 rc = -EINVAL;
 601         }
 602
 603 out:
 604         return rc;
 605 }
 606
 607 static int do_tls_getsockopt_tx_zc(struct sock *sk, char __user *optval,
 608                                    int __user *optlen)
 609 {
 610         struct tls_context *ctx = tls_get_ctx(sk);
 611         unsigned int value;
 612         int len;
 613
 614         if (get_user(len, optlen))
 615                 return -EFAULT;
 616
 617         if (len != sizeof(value))
 618                 return -EINVAL;
 619
 620         value = ctx->zerocopy_sendfile;
 621         if (copy_to_user(optval, &value, sizeof(value)))
 622                 return -EFAULT;
 623
 624         return 0;
 625 }
 626
 627 static int do_tls_getsockopt_no_pad(struct sock *sk, char __user *optval,
 628                                     int __user *optlen)
 629 {
 630         struct tls_context *ctx = tls_get_ctx(sk);
 631         int value, len;
 632
 633         if (ctx->prot_info.version != TLS_1_3_VERSION)
 634                 return -EINVAL;
 635
 636         if (get_user(len, optlen))
 637                 return -EFAULT;
 638         if (len < sizeof(value))
 639                 return -EINVAL;
 640
 641         value = -EINVAL;
 642         if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW)
 643                 value = ctx->rx_no_pad;
 644         if (value < 0)
 645                 return value;
 646
 647         if (put_user(sizeof(value), optlen))
 648                 return -EFAULT;
 649         if (copy_to_user(optval, &value, sizeof(value)))
 650                 return -EFAULT;
 651
 652         return 0;
 653 }
 654
 655 static int do_tls_getsockopt(struct sock *sk, int optname,
 656                              char __user *optval, int __user *optlen)
 657 {
 658         int rc = 0;
 659
 660         lock_sock(sk);
 661
 662         switch (optname) {
 663         case TLS_TX:
 664         case TLS_RX:
 665                 rc = do_tls_getsockopt_conf(sk, optval, optlen,
 666                                             optname == TLS_TX);
 667                 break;
 668         case TLS_TX_ZEROCOPY_RO:
 669                 rc = do_tls_getsockopt_tx_zc(sk, optval, optlen);
 670                 break;
 671         case TLS_RX_EXPECT_NO_PAD:
 672                 rc = do_tls_getsockopt_no_pad(sk, optval, optlen);
 673                 break;
 674         default:
 675                 rc = -ENOPROTOOPT;
 676                 break;
 677         }
 678
 679         release_sock(sk);
 680
 681         return rc;
 682 }
 683
 684 static int tls_getsockopt(struct sock *sk, int level, int optname,
 685                           char __user *optval, int __user *optlen)
 686 {
 687         struct tls_context *ctx = tls_get_ctx(sk);
 688
 689         if (level != SOL_TLS)
 690                 return ctx->sk_proto->getsockopt(sk, level,
 691                                                  optname, optval, optlen);
 692
 693         return do_tls_getsockopt(sk, optname, optval, optlen);
 694 }
 695
 696 static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
 697                                   unsigned int optlen, int tx)
 698 {
 699         struct tls_crypto_info *crypto_info;
 700         struct tls_crypto_info *alt_crypto_info;
 701         struct tls_context *ctx = tls_get_ctx(sk);
 702         size_t optsize;
 703         int rc = 0;
 704         int conf;
 705
 706         if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info)))
 707                 return -EINVAL;
 708
 709         if (tx) {
 710                 crypto_info = &ctx->crypto_send.info;
 711                 alt_crypto_info = &ctx->crypto_recv.info;
 712         } else {
 713                 crypto_info = &ctx->crypto_recv.info;
 714                 alt_crypto_info = &ctx->crypto_send.info;
 715         }
 716
 717         /* Currently we don't support set crypto info more than one time */
 718         if (TLS_CRYPTO_INFO_READY(crypto_info))
 719                 return -EBUSY;
 720
 721         rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info));
 722         if (rc) {
 723                 rc = -EFAULT;
 724                 goto err_crypto_info;
 725         }
 726
 727         /* check version */
 728         if (crypto_info->version != TLS_1_2_VERSION &&
 729             crypto_info->version != TLS_1_3_VERSION) {
 730                 rc = -EINVAL;
 731                 goto err_crypto_info;
 732         }
 733
 734         /* Ensure that TLS version and ciphers are same in both directions */
 735         if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
 736                 if (alt_crypto_info->version != crypto_info->version ||
 737                     alt_crypto_info->cipher_type != crypto_info->cipher_type) {
 738                         rc = -EINVAL;
 739                         goto err_crypto_info;
 740                 }
 741         }
 742
 743         switch (crypto_info->cipher_type) {
 744         case TLS_CIPHER_AES_GCM_128:
 745                 optsize = sizeof(struct tls12_crypto_info_aes_gcm_128);
 746                 break;
 747         case TLS_CIPHER_AES_GCM_256: {
 748                 optsize = sizeof(struct tls12_crypto_info_aes_gcm_256);
 749                 break;
 750         }
 751         case TLS_CIPHER_AES_CCM_128:
 752                 optsize = sizeof(struct tls12_crypto_info_aes_ccm_128);
 753                 break;
 754         case TLS_CIPHER_CHACHA20_POLY1305:
 755                 optsize = sizeof(struct tls12_crypto_info_chacha20_poly1305);
 756                 break;
 757         case TLS_CIPHER_SM4_GCM:
 758                 optsize = sizeof(struct tls12_crypto_info_sm4_gcm);
 759                 break;
 760         case TLS_CIPHER_SM4_CCM:
 761                 optsize = sizeof(struct tls12_crypto_info_sm4_ccm);
 762                 break;
 763         case TLS_CIPHER_ARIA_GCM_128:
 764                 if (crypto_info->version != TLS_1_2_VERSION) {
 765                         rc = -EINVAL;
 766                         goto err_crypto_info;
 767                 }
 768                 optsize = sizeof(struct tls12_crypto_info_aria_gcm_128);
 769                 break;
 770         case TLS_CIPHER_ARIA_GCM_256:
 771                 if (crypto_info->version != TLS_1_2_VERSION) {
 772                         rc = -EINVAL;
 773                         goto err_crypto_info;
 774                 }
 775                 optsize = sizeof(struct tls12_crypto_info_aria_gcm_256);
 776                 break;
 777         default:
 778                 rc = -EINVAL;
 779                 goto err_crypto_info;
 780         }
 781
 782         if (optlen != optsize) {
 783                 rc = -EINVAL;
 784                 goto err_crypto_info;
 785         }
 786
 787         rc = copy_from_sockptr_offset(crypto_info + 1, optval,
 788                                       sizeof(*crypto_info),
 789                                       optlen - sizeof(*crypto_info));
 790         if (rc) {
 791                 rc = -EFAULT;
 792                 goto err_crypto_info;
 793         }
 794
 795         if (tx) {
 796                 rc = tls_set_device_offload(sk, ctx);
 797                 conf = TLS_HW;
 798                 if (!rc) {
 799                         TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE);
 800                         TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
 801                 } else {
 802                         rc = tls_set_sw_offload(sk, ctx, 1);
 803                         if (rc)
 804                                 goto err_crypto_info;
 805                         TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW);
 806                         TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
 807                         conf = TLS_SW;
 808                 }
 809         } else {
 810                 rc = tls_set_device_offload_rx(sk, ctx);
 811                 conf = TLS_HW;
 812                 if (!rc) {
 813                         TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE);
 814                         TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
 815                 } else {
 816                         rc = tls_set_sw_offload(sk, ctx, 0);
 817                         if (rc)
 818                                 goto err_crypto_info;
 819                         TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW);
 820                         TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW);
 821                         conf = TLS_SW;
 822                 }
 823                 tls_sw_strparser_arm(sk, ctx);
 824         }
 825
 826         if (tx)
 827                 ctx->tx_conf = conf;
 828         else
 829                 ctx->rx_conf = conf;
 830         update_sk_prot(sk, ctx);
 831         if (tx) {
 832                 ctx->sk_write_space = sk->sk_write_space;
 833                 sk->sk_write_space = tls_write_space;
 834         } else {
 835                 struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(ctx);
 836
 837                 tls_strp_check_rcv(&rx_ctx->strp);
 838         }
 839         return 0;
 840
 841 err_crypto_info:
 842         memzero_explicit(crypto_info, sizeof(union tls_crypto_context));
 843         return rc;
 844 }
 845
 846 static int do_tls_setsockopt_tx_zc(struct sock *sk, sockptr_t optval,
 847                                    unsigned int optlen)
 848 {
 849         struct tls_context *ctx = tls_get_ctx(sk);
 850         unsigned int value;
 851
 852         if (sockptr_is_null(optval) || optlen != sizeof(value))
 853                 return -EINVAL;
 854
 855         if (copy_from_sockptr(&value, optval, sizeof(value)))
 856                 return -EFAULT;
 857
 858         if (value > 1)
 859                 return -EINVAL;
 860
 861         ctx->zerocopy_sendfile = value;
 862
 863         return 0;
 864 }
 865
 866 static int do_tls_setsockopt_no_pad(struct sock *sk, sockptr_t optval,
 867                                     unsigned int optlen)
 868 {
 869         struct tls_context *ctx = tls_get_ctx(sk);
 870         u32 val;
 871         int rc;
 872
 873         if (ctx->prot_info.version != TLS_1_3_VERSION ||
 874             sockptr_is_null(optval) || optlen < sizeof(val))
 875                 return -EINVAL;
 876
 877         rc = copy_from_sockptr(&val, optval, sizeof(val));
 878         if (rc)
 879                 return -EFAULT;
 880         if (val > 1)
 881                 return -EINVAL;
 882         rc = check_zeroed_sockptr(optval, sizeof(val), optlen - sizeof(val));
 883         if (rc < 1)
 884                 return rc == 0 ? -EINVAL : rc;
 885
 886         lock_sock(sk);
 887         rc = -EINVAL;
 888         if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) {
 889                 ctx->rx_no_pad = val;
 890                 tls_update_rx_zc_capable(ctx);
 891                 rc = 0;
 892         }
 893         release_sock(sk);
 894
 895         return rc;
 896 }
 897
 898 static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval,
 899                              unsigned int optlen)
 900 {
 901         int rc = 0;
 902
 903         switch (optname) {
 904         case TLS_TX:
 905         case TLS_RX:
 906                 lock_sock(sk);
 907                 rc = do_tls_setsockopt_conf(sk, optval, optlen,
 908                                             optname == TLS_TX);
 909                 release_sock(sk);
 910                 break;
 911         case TLS_TX_ZEROCOPY_RO:
 912                 lock_sock(sk);
 913                 rc = do_tls_setsockopt_tx_zc(sk, optval, optlen);
 914                 release_sock(sk);
 915                 break;
 916         case TLS_RX_EXPECT_NO_PAD:
 917                 rc = do_tls_setsockopt_no_pad(sk, optval, optlen);
 918                 break;
 919         default:
 920                 rc = -ENOPROTOOPT;
 921                 break;
 922         }
 923         return rc;
 924 }
 925
 926 static int tls_setsockopt(struct sock *sk, int level, int optname,
 927                           sockptr_t optval, unsigned int optlen)
 928 {
 929         struct tls_context *ctx = tls_get_ctx(sk);
 930
 931         if (level != SOL_TLS)
 932                 return ctx->sk_proto->setsockopt(sk, level, optname, optval,
 933                                                  optlen);
 934
 935         return do_tls_setsockopt(sk, optname, optval, optlen);
 936 }
 937
 938 struct tls_context *tls_ctx_create(struct sock *sk)
 939 {
 940         struct inet_connection_sock *icsk = inet_csk(sk);
 941         struct tls_context *ctx;
 942
 943         ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
 944         if (!ctx)
 945                 return NULL;
 946
 947         mutex_init(&ctx->tx_lock);
 948         rcu_assign_pointer(icsk->icsk_ulp_data, ctx);
 949         ctx->sk_proto = READ_ONCE(sk->sk_prot);
 950         ctx->sk = sk;
 951         return ctx;
 952 }
 953
 954 static void build_proto_ops(struct proto_ops ops[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
 955                             const struct proto_ops *base)
 956 {
 957         ops[TLS_BASE][TLS_BASE] = *base;
 958
 959         ops[TLS_SW  ][TLS_BASE] = ops[TLS_BASE][TLS_BASE];
 960         ops[TLS_SW  ][TLS_BASE].splice_eof      = tls_sw_splice_eof;
 961         ops[TLS_SW  ][TLS_BASE].sendpage_locked = tls_sw_sendpage_locked;
 962
 963         ops[TLS_BASE][TLS_SW  ] = ops[TLS_BASE][TLS_BASE];
 964         ops[TLS_BASE][TLS_SW  ].splice_read     = tls_sw_splice_read;
 965         ops[TLS_BASE][TLS_SW  ].poll            = tls_sk_poll;
 966
 967         ops[TLS_SW  ][TLS_SW  ] = ops[TLS_SW  ][TLS_BASE];
 968         ops[TLS_SW  ][TLS_SW  ].splice_read     = tls_sw_splice_read;
 969         ops[TLS_SW  ][TLS_SW  ].poll            = tls_sk_poll;
 970
 971 #ifdef CONFIG_TLS_DEVICE
 972         ops[TLS_HW  ][TLS_BASE] = ops[TLS_BASE][TLS_BASE];
 973         ops[TLS_HW  ][TLS_BASE].sendpage_locked = NULL;
 974
 975         ops[TLS_HW  ][TLS_SW  ] = ops[TLS_BASE][TLS_SW  ];
 976         ops[TLS_HW  ][TLS_SW  ].sendpage_locked = NULL;
 977
 978         ops[TLS_BASE][TLS_HW  ] = ops[TLS_BASE][TLS_SW  ];
 979
 980         ops[TLS_SW  ][TLS_HW  ] = ops[TLS_SW  ][TLS_SW  ];
 981
 982         ops[TLS_HW  ][TLS_HW  ] = ops[TLS_HW  ][TLS_SW  ];
 983         ops[TLS_HW  ][TLS_HW  ].sendpage_locked = NULL;
 984 #endif
 985 #ifdef CONFIG_TLS_TOE
 986         ops[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
 987 #endif
 988 }
 989
 990 static void tls_build_proto(struct sock *sk)
 991 {
 992         int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
 993         struct proto *prot = READ_ONCE(sk->sk_prot);
 994
 995         /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */
 996         if (ip_ver == TLSV6 &&
 997             unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) {
 998                 mutex_lock(&tcpv6_prot_mutex);
 999                 if (likely(prot != saved_tcpv6_prot)) {
1000                         build_protos(tls_prots[TLSV6], prot);
1001                         build_proto_ops(tls_proto_ops[TLSV6],
1002                                         sk->sk_socket->ops);
1003                         smp_store_release(&saved_tcpv6_prot, prot);
1004                 }
1005                 mutex_unlock(&tcpv6_prot_mutex);
1006         }
1007
1008         if (ip_ver == TLSV4 &&
1009             unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) {
1010                 mutex_lock(&tcpv4_prot_mutex);
1011                 if (likely(prot != saved_tcpv4_prot)) {
1012                         build_protos(tls_prots[TLSV4], prot);
1013                         build_proto_ops(tls_proto_ops[TLSV4],
1014                                         sk->sk_socket->ops);
1015                         smp_store_release(&saved_tcpv4_prot, prot);
1016                 }
1017                 mutex_unlock(&tcpv4_prot_mutex);
1018         }
1019 }
1020
1021 static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
1022                          const struct proto *base)
1023 {
1024         prot[TLS_BASE][TLS_BASE] = *base;
1025         prot[TLS_BASE][TLS_BASE].setsockopt     = tls_setsockopt;
1026         prot[TLS_BASE][TLS_BASE].getsockopt     = tls_getsockopt;
1027         prot[TLS_BASE][TLS_BASE].close          = tls_sk_proto_close;
1028
1029         prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
1030         prot[TLS_SW][TLS_BASE].sendmsg          = tls_sw_sendmsg;
1031         prot[TLS_SW][TLS_BASE].splice_eof       = tls_sw_splice_eof;
1032         prot[TLS_SW][TLS_BASE].sendpage         = tls_sw_sendpage;
1033
1034         prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE];
1035         prot[TLS_BASE][TLS_SW].recvmsg            = tls_sw_recvmsg;
1036         prot[TLS_BASE][TLS_SW].sock_is_readable   = tls_sw_sock_is_readable;
1037         prot[TLS_BASE][TLS_SW].close              = tls_sk_proto_close;
1038
1039         prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE];
1040         prot[TLS_SW][TLS_SW].recvmsg            = tls_sw_recvmsg;
1041         prot[TLS_SW][TLS_SW].sock_is_readable   = tls_sw_sock_is_readable;
1042         prot[TLS_SW][TLS_SW].close              = tls_sk_proto_close;
1043
1044 #ifdef CONFIG_TLS_DEVICE
1045         prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
1046         prot[TLS_HW][TLS_BASE].sendmsg          = tls_device_sendmsg;
1047         prot[TLS_HW][TLS_BASE].splice_eof       = tls_device_splice_eof;
1048         prot[TLS_HW][TLS_BASE].sendpage         = tls_device_sendpage;
1049
1050         prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW];
1051         prot[TLS_HW][TLS_SW].sendmsg            = tls_device_sendmsg;
1052         prot[TLS_HW][TLS_SW].splice_eof         = tls_device_splice_eof;
1053         prot[TLS_HW][TLS_SW].sendpage           = tls_device_sendpage;
1054
1055         prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW];
1056
1057         prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW];
1058
1059         prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW];
1060 #endif
1061 #ifdef CONFIG_TLS_TOE
1062         prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
1063         prot[TLS_HW_RECORD][TLS_HW_RECORD].hash         = tls_toe_hash;
1064         prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash       = tls_toe_unhash;
1065 #endif
1066 }
1067
1068 static int tls_init(struct sock *sk)
1069 {
1070         struct tls_context *ctx;
1071         int rc = 0;
1072
1073         tls_build_proto(sk);
1074
1075 #ifdef CONFIG_TLS_TOE
1076         if (tls_toe_bypass(sk))
1077                 return 0;
1078 #endif
1079
1080         /* The TLS ulp is currently supported only for TCP sockets
1081          * in ESTABLISHED state.
1082          * Supporting sockets in LISTEN state will require us
1083          * to modify the accept implementation to clone rather then
1084          * share the ulp context.
1085          */
1086         if (sk->sk_state != TCP_ESTABLISHED)
1087                 return -ENOTCONN;
1088
1089         /* allocate tls context */
1090         write_lock_bh(&sk->sk_callback_lock);
1091         ctx = tls_ctx_create(sk);
1092         if (!ctx) {
1093                 rc = -ENOMEM;
1094                 goto out;
1095         }
1096
1097         ctx->tx_conf = TLS_BASE;
1098         ctx->rx_conf = TLS_BASE;
1099         update_sk_prot(sk, ctx);
1100 out:
1101         write_unlock_bh(&sk->sk_callback_lock);
1102         return rc;
1103 }
1104
1105 static void tls_update(struct sock *sk, struct proto *p,
1106                        void (*write_space)(struct sock *sk))
1107 {
1108         struct tls_context *ctx;
1109
1110         WARN_ON_ONCE(sk->sk_prot == p);
1111
1112         ctx = tls_get_ctx(sk);
1113         if (likely(ctx)) {
1114                 ctx->sk_write_space = write_space;
1115                 ctx->sk_proto = p;
1116         } else {
1117                 /* Pairs with lockless read in sk_clone_lock(). */
1118                 WRITE_ONCE(sk->sk_prot, p);
1119                 sk->sk_write_space = write_space;
1120         }
1121 }
1122
1123 static u16 tls_user_config(struct tls_context *ctx, bool tx)
1124 {
1125         u16 config = tx ? ctx->tx_conf : ctx->rx_conf;
1126
1127         switch (config) {
1128         case TLS_BASE:
1129                 return TLS_CONF_BASE;
1130         case TLS_SW:
1131                 return TLS_CONF_SW;
1132         case TLS_HW:
1133                 return TLS_CONF_HW;
1134         case TLS_HW_RECORD:
1135                 return TLS_CONF_HW_RECORD;
1136         }
1137         return 0;
1138 }
1139
1140 static int tls_get_info(const struct sock *sk, struct sk_buff *skb)
1141 {
1142         u16 version, cipher_type;
1143         struct tls_context *ctx;
1144         struct nlattr *start;
1145         int err;
1146
1147         start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS);
1148         if (!start)
1149                 return -EMSGSIZE;
1150
1151         rcu_read_lock();
1152         ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data);
1153         if (!ctx) {
1154                 err = 0;
1155                 goto nla_failure;
1156         }
1157         version = ctx->prot_info.version;
1158         if (version) {
1159                 err = nla_put_u16(skb, TLS_INFO_VERSION, version);
1160                 if (err)
1161                         goto nla_failure;
1162         }
1163         cipher_type = ctx->prot_info.cipher_type;
1164         if (cipher_type) {
1165                 err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type);
1166                 if (err)
1167                         goto nla_failure;
1168         }
1169         err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true));
1170         if (err)
1171                 goto nla_failure;
1172
1173         err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false));
1174         if (err)
1175                 goto nla_failure;
1176
1177         if (ctx->tx_conf == TLS_HW && ctx->zerocopy_sendfile) {
1178                 err = nla_put_flag(skb, TLS_INFO_ZC_RO_TX);
1179                 if (err)
1180                         goto nla_failure;
1181         }
1182         if (ctx->rx_no_pad) {
1183                 err = nla_put_flag(skb, TLS_INFO_RX_NO_PAD);
1184                 if (err)
1185                         goto nla_failure;
1186         }
1187
1188         rcu_read_unlock();
1189         nla_nest_end(skb, start);
1190         return 0;
1191
1192 nla_failure:
1193         rcu_read_unlock();
1194         nla_nest_cancel(skb, start);
1195         return err;
1196 }
1197
1198 static size_t tls_get_info_size(const struct sock *sk)
1199 {
1200         size_t size = 0;
1201
1202         size += nla_total_size(0) +             /* INET_ULP_INFO_TLS */
1203                 nla_total_size(sizeof(u16)) +   /* TLS_INFO_VERSION */
1204                 nla_total_size(sizeof(u16)) +   /* TLS_INFO_CIPHER */
1205                 nla_total_size(sizeof(u16)) +   /* TLS_INFO_RXCONF */
1206                 nla_total_size(sizeof(u16)) +   /* TLS_INFO_TXCONF */
1207                 nla_total_size(0) +             /* TLS_INFO_ZC_RO_TX */
1208                 nla_total_size(0) +             /* TLS_INFO_RX_NO_PAD */
1209                 0;
1210
1211         return size;
1212 }
1213
1214 static int __net_init tls_init_net(struct net *net)
1215 {
1216         int err;
1217
1218         net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib);
1219         if (!net->mib.tls_statistics)
1220                 return -ENOMEM;
1221
1222         err = tls_proc_init(net);
1223         if (err)
1224                 goto err_free_stats;
1225
1226         return 0;
1227 err_free_stats:
1228         free_percpu(net->mib.tls_statistics);
1229         return err;
1230 }
1231
1232 static void __net_exit tls_exit_net(struct net *net)
1233 {
1234         tls_proc_fini(net);
1235         free_percpu(net->mib.tls_statistics);
1236 }
1237
1238 static struct pernet_operations tls_proc_ops = {
1239         .init = tls_init_net,
1240         .exit = tls_exit_net,
1241 };
1242
1243 static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = {
1244         .name                   = "tls",
1245         .owner                  = THIS_MODULE,
1246         .init                   = tls_init,
1247         .update                 = tls_update,
1248         .get_info               = tls_get_info,
1249         .get_info_size          = tls_get_info_size,
1250 };
1251
1252 static int __init tls_register(void)
1253 {
1254         int err;
1255
1256         err = register_pernet_subsys(&tls_proc_ops);
1257         if (err)
1258                 return err;
1259
1260         err = tls_strp_dev_init();
1261         if (err)
1262                 goto err_pernet;
1263
1264         err = tls_device_init();
1265         if (err)
1266                 goto err_strp;
1267
1268         tcp_register_ulp(&tcp_tls_ulp_ops);
1269
1270         return 0;
1271 err_strp:
1272         tls_strp_dev_exit();
1273 err_pernet:
1274         unregister_pernet_subsys(&tls_proc_ops);
1275         return err;
1276 }
1277
1278 static void __exit tls_unregister(void)
1279 {
1280         tcp_unregister_ulp(&tcp_tls_ulp_ops);
1281         tls_strp_dev_exit();
1282         tls_device_cleanup();
1283         unregister_pernet_subsys(&tls_proc_ops);
1284 }
1285
1286 module_init(tls_register);
1287 module_exit(tls_unregister);