13c4d7559SDave Watson /* 23c4d7559SDave Watson * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved. 33c4d7559SDave Watson * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved. 43c4d7559SDave Watson * 53c4d7559SDave Watson * This software is available to you under a choice of one of two 63c4d7559SDave Watson * licenses. You may choose to be licensed under the terms of the GNU 73c4d7559SDave Watson * General Public License (GPL) Version 2, available from the file 83c4d7559SDave Watson * COPYING in the main directory of this source tree, or the 93c4d7559SDave Watson * OpenIB.org BSD license below: 103c4d7559SDave Watson * 113c4d7559SDave Watson * Redistribution and use in source and binary forms, with or 123c4d7559SDave Watson * without modification, are permitted provided that the following 133c4d7559SDave Watson * conditions are met: 143c4d7559SDave Watson * 153c4d7559SDave Watson * - Redistributions of source code must retain the above 163c4d7559SDave Watson * copyright notice, this list of conditions and the following 173c4d7559SDave Watson * disclaimer. 183c4d7559SDave Watson * 193c4d7559SDave Watson * - Redistributions in binary form must reproduce the above 203c4d7559SDave Watson * copyright notice, this list of conditions and the following 213c4d7559SDave Watson * disclaimer in the documentation and/or other materials 223c4d7559SDave Watson * provided with the distribution. 233c4d7559SDave Watson * 243c4d7559SDave Watson * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 253c4d7559SDave Watson * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 263c4d7559SDave Watson * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 273c4d7559SDave Watson * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 283c4d7559SDave Watson * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 293c4d7559SDave Watson * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 303c4d7559SDave Watson * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 313c4d7559SDave Watson * SOFTWARE. 323c4d7559SDave Watson */ 333c4d7559SDave Watson 343c4d7559SDave Watson #include <linux/module.h> 353c4d7559SDave Watson 363c4d7559SDave Watson #include <net/tcp.h> 373c4d7559SDave Watson #include <net/inet_common.h> 383c4d7559SDave Watson #include <linux/highmem.h> 393c4d7559SDave Watson #include <linux/netdevice.h> 403c4d7559SDave Watson #include <linux/sched/signal.h> 41dd0bed16SAtul Gupta #include <linux/inetdevice.h> 423c4d7559SDave Watson 433c4d7559SDave Watson #include <net/tls.h> 443c4d7559SDave Watson 453c4d7559SDave Watson MODULE_AUTHOR("Mellanox Technologies"); 463c4d7559SDave Watson MODULE_DESCRIPTION("Transport Layer Security Support"); 473c4d7559SDave Watson MODULE_LICENSE("Dual BSD/GPL"); 48037b0b86SDaniel Borkmann MODULE_ALIAS_TCP_ULP("tls"); 493c4d7559SDave Watson 506d88207fSIlya Lesokhin enum { 51c113187dSBoris Pismenny TLSV4, 52c113187dSBoris Pismenny TLSV6, 53c113187dSBoris Pismenny TLS_NUM_PROTS, 54c113187dSBoris Pismenny }; 556d88207fSIlya Lesokhin 56c113187dSBoris Pismenny static struct proto *saved_tcpv6_prot; 57c113187dSBoris Pismenny static DEFINE_MUTEX(tcpv6_prot_mutex); 5828cb6f1eSJohn Fastabend static struct proto *saved_tcpv4_prot; 5928cb6f1eSJohn Fastabend static DEFINE_MUTEX(tcpv4_prot_mutex); 60dd0bed16SAtul Gupta static LIST_HEAD(device_list); 61df9d4a17SAtul Gupta static DEFINE_SPINLOCK(device_spinlock); 62f66de3eeSBoris Pismenny static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; 63c46234ebSDave Watson static struct proto_ops tls_sw_proto_ops; 6463a6b3feSAtul Gupta static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 6563a6b3feSAtul Gupta struct proto *base); 666d88207fSIlya Lesokhin 67f66de3eeSBoris Pismenny static void update_sk_prot(struct sock *sk, struct tls_context *ctx) 686d88207fSIlya Lesokhin { 69c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 70c113187dSBoris Pismenny 71f66de3eeSBoris Pismenny sk->sk_prot = &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]; 726d88207fSIlya Lesokhin } 733c4d7559SDave Watson 743c4d7559SDave Watson int wait_on_pending_writer(struct sock *sk, long *timeo) 753c4d7559SDave Watson { 763c4d7559SDave Watson int rc = 0; 773c4d7559SDave Watson DEFINE_WAIT_FUNC(wait, woken_wake_function); 783c4d7559SDave Watson 793c4d7559SDave Watson add_wait_queue(sk_sleep(sk), &wait); 803c4d7559SDave Watson while (1) { 813c4d7559SDave Watson if (!*timeo) { 823c4d7559SDave Watson rc = -EAGAIN; 833c4d7559SDave Watson break; 843c4d7559SDave Watson } 853c4d7559SDave Watson 863c4d7559SDave Watson if (signal_pending(current)) { 873c4d7559SDave Watson rc = sock_intr_errno(*timeo); 883c4d7559SDave Watson break; 893c4d7559SDave Watson } 903c4d7559SDave Watson 913c4d7559SDave Watson if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) 923c4d7559SDave Watson break; 933c4d7559SDave Watson } 943c4d7559SDave Watson remove_wait_queue(sk_sleep(sk), &wait); 953c4d7559SDave Watson return rc; 963c4d7559SDave Watson } 973c4d7559SDave Watson 983c4d7559SDave Watson int tls_push_sg(struct sock *sk, 993c4d7559SDave Watson struct tls_context *ctx, 1003c4d7559SDave Watson struct scatterlist *sg, 1013c4d7559SDave Watson u16 first_offset, 1023c4d7559SDave Watson int flags) 1033c4d7559SDave Watson { 1043c4d7559SDave Watson int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; 1053c4d7559SDave Watson int ret = 0; 1063c4d7559SDave Watson struct page *p; 1073c4d7559SDave Watson size_t size; 1083c4d7559SDave Watson int offset = first_offset; 1093c4d7559SDave Watson 1103c4d7559SDave Watson size = sg->length - offset; 1113c4d7559SDave Watson offset += sg->offset; 1123c4d7559SDave Watson 113c212d2c7SDave Watson ctx->in_tcp_sendpages = true; 1143c4d7559SDave Watson while (1) { 1153c4d7559SDave Watson if (sg_is_last(sg)) 1163c4d7559SDave Watson sendpage_flags = flags; 1173c4d7559SDave Watson 1183c4d7559SDave Watson /* is sending application-limited? */ 1193c4d7559SDave Watson tcp_rate_check_app_limited(sk); 1203c4d7559SDave Watson p = sg_page(sg); 1213c4d7559SDave Watson retry: 1223c4d7559SDave Watson ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); 1233c4d7559SDave Watson 1243c4d7559SDave Watson if (ret != size) { 1253c4d7559SDave Watson if (ret > 0) { 1263c4d7559SDave Watson offset += ret; 1273c4d7559SDave Watson size -= ret; 1283c4d7559SDave Watson goto retry; 1293c4d7559SDave Watson } 1303c4d7559SDave Watson 1313c4d7559SDave Watson offset -= sg->offset; 1323c4d7559SDave Watson ctx->partially_sent_offset = offset; 1333c4d7559SDave Watson ctx->partially_sent_record = (void *)sg; 134080324c3SAndre Tomt ctx->in_tcp_sendpages = false; 1353c4d7559SDave Watson return ret; 1363c4d7559SDave Watson } 1373c4d7559SDave Watson 1383c4d7559SDave Watson put_page(p); 1393c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 1403c4d7559SDave Watson sg = sg_next(sg); 1413c4d7559SDave Watson if (!sg) 1423c4d7559SDave Watson break; 1433c4d7559SDave Watson 1443c4d7559SDave Watson offset = sg->offset; 1453c4d7559SDave Watson size = sg->length; 1463c4d7559SDave Watson } 1473c4d7559SDave Watson 148c212d2c7SDave Watson ctx->in_tcp_sendpages = false; 1493c4d7559SDave Watson 1503c4d7559SDave Watson return 0; 1513c4d7559SDave Watson } 1523c4d7559SDave Watson 1533c4d7559SDave Watson static int tls_handle_open_record(struct sock *sk, int flags) 1543c4d7559SDave Watson { 1553c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 1563c4d7559SDave Watson 1573c4d7559SDave Watson if (tls_is_pending_open_record(ctx)) 1583c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 1593c4d7559SDave Watson 1603c4d7559SDave Watson return 0; 1613c4d7559SDave Watson } 1623c4d7559SDave Watson 1633c4d7559SDave Watson int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 1643c4d7559SDave Watson unsigned char *record_type) 1653c4d7559SDave Watson { 1663c4d7559SDave Watson struct cmsghdr *cmsg; 1673c4d7559SDave Watson int rc = -EINVAL; 1683c4d7559SDave Watson 1693c4d7559SDave Watson for_each_cmsghdr(cmsg, msg) { 1703c4d7559SDave Watson if (!CMSG_OK(msg, cmsg)) 1713c4d7559SDave Watson return -EINVAL; 1723c4d7559SDave Watson if (cmsg->cmsg_level != SOL_TLS) 1733c4d7559SDave Watson continue; 1743c4d7559SDave Watson 1753c4d7559SDave Watson switch (cmsg->cmsg_type) { 1763c4d7559SDave Watson case TLS_SET_RECORD_TYPE: 1773c4d7559SDave Watson if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) 1783c4d7559SDave Watson return -EINVAL; 1793c4d7559SDave Watson 1803c4d7559SDave Watson if (msg->msg_flags & MSG_MORE) 1813c4d7559SDave Watson return -EINVAL; 1823c4d7559SDave Watson 1833c4d7559SDave Watson rc = tls_handle_open_record(sk, msg->msg_flags); 1843c4d7559SDave Watson if (rc) 1853c4d7559SDave Watson return rc; 1863c4d7559SDave Watson 1873c4d7559SDave Watson *record_type = *(unsigned char *)CMSG_DATA(cmsg); 1883c4d7559SDave Watson rc = 0; 1893c4d7559SDave Watson break; 1903c4d7559SDave Watson default: 1913c4d7559SDave Watson return -EINVAL; 1923c4d7559SDave Watson } 1933c4d7559SDave Watson } 1943c4d7559SDave Watson 1953c4d7559SDave Watson return rc; 1963c4d7559SDave Watson } 1973c4d7559SDave Watson 198a42055e8SVakul Garg int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 199a42055e8SVakul Garg int flags) 2003c4d7559SDave Watson { 2013c4d7559SDave Watson struct scatterlist *sg; 2023c4d7559SDave Watson u16 offset; 2033c4d7559SDave Watson 2043c4d7559SDave Watson sg = ctx->partially_sent_record; 2053c4d7559SDave Watson offset = ctx->partially_sent_offset; 2063c4d7559SDave Watson 2073c4d7559SDave Watson ctx->partially_sent_record = NULL; 2083c4d7559SDave Watson return tls_push_sg(sk, ctx, sg, offset, flags); 2093c4d7559SDave Watson } 2103c4d7559SDave Watson 21135b71a34SJakub Kicinski bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx) 21235b71a34SJakub Kicinski { 21335b71a34SJakub Kicinski struct scatterlist *sg; 21435b71a34SJakub Kicinski 21535b71a34SJakub Kicinski sg = ctx->partially_sent_record; 21635b71a34SJakub Kicinski if (!sg) 21735b71a34SJakub Kicinski return false; 21835b71a34SJakub Kicinski 21935b71a34SJakub Kicinski while (1) { 22035b71a34SJakub Kicinski put_page(sg_page(sg)); 22135b71a34SJakub Kicinski sk_mem_uncharge(sk, sg->length); 22235b71a34SJakub Kicinski 22335b71a34SJakub Kicinski if (sg_is_last(sg)) 22435b71a34SJakub Kicinski break; 22535b71a34SJakub Kicinski sg++; 22635b71a34SJakub Kicinski } 22735b71a34SJakub Kicinski ctx->partially_sent_record = NULL; 22835b71a34SJakub Kicinski return true; 22935b71a34SJakub Kicinski } 23035b71a34SJakub Kicinski 2313c4d7559SDave Watson static void tls_write_space(struct sock *sk) 2323c4d7559SDave Watson { 2333c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2343c4d7559SDave Watson 23567db7cd2SJohn Fastabend /* If in_tcp_sendpages call lower protocol write space handler 23667db7cd2SJohn Fastabend * to ensure we wake up any waiting operations there. For example 23767db7cd2SJohn Fastabend * if do_tcp_sendpages where to call sk_wait_event. 23867db7cd2SJohn Fastabend */ 23967db7cd2SJohn Fastabend if (ctx->in_tcp_sendpages) { 24067db7cd2SJohn Fastabend ctx->sk_write_space(sk); 241c212d2c7SDave Watson return; 24267db7cd2SJohn Fastabend } 243c212d2c7SDave Watson 2447463d3a2SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 2457463d3a2SBoris Pismenny if (ctx->tx_conf == TLS_HW) 2467463d3a2SBoris Pismenny tls_device_write_space(sk, ctx); 2477463d3a2SBoris Pismenny else 2487463d3a2SBoris Pismenny #endif 2497463d3a2SBoris Pismenny tls_sw_write_space(sk, ctx); 2504504ab0eSVakul Garg 2514504ab0eSVakul Garg ctx->sk_write_space(sk); 2523c4d7559SDave Watson } 2533c4d7559SDave Watson 25486029d10SSabrina Dubroca static void tls_ctx_free(struct tls_context *ctx) 25586029d10SSabrina Dubroca { 25686029d10SSabrina Dubroca if (!ctx) 25786029d10SSabrina Dubroca return; 25886029d10SSabrina Dubroca 25986029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); 26086029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); 26186029d10SSabrina Dubroca kfree(ctx); 26286029d10SSabrina Dubroca } 26386029d10SSabrina Dubroca 2643c4d7559SDave Watson static void tls_sk_proto_close(struct sock *sk, long timeout) 2653c4d7559SDave Watson { 2663c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2673c4d7559SDave Watson long timeo = sock_sndtimeo(sk, 0); 2683c4d7559SDave Watson void (*sk_proto_close)(struct sock *sk, long timeout); 26998f0a395SEric Dumazet bool free_ctx = false; 2703c4d7559SDave Watson 2713c4d7559SDave Watson lock_sock(sk); 272ff45d820SIlya Lesokhin sk_proto_close = ctx->sk_proto_close; 273ff45d820SIlya Lesokhin 27476f7164dSAtul Gupta if (ctx->tx_conf == TLS_HW_RECORD && ctx->rx_conf == TLS_HW_RECORD) 27576f7164dSAtul Gupta goto skip_tx_cleanup; 27676f7164dSAtul Gupta 27776f7164dSAtul Gupta if (ctx->tx_conf == TLS_BASE && ctx->rx_conf == TLS_BASE) { 27898f0a395SEric Dumazet free_ctx = true; 279ff45d820SIlya Lesokhin goto skip_tx_cleanup; 280ff45d820SIlya Lesokhin } 2813c4d7559SDave Watson 2823c4d7559SDave Watson if (!tls_complete_pending_work(sk, ctx, 0, &timeo)) 2833c4d7559SDave Watson tls_handle_open_record(sk, 0); 2843c4d7559SDave Watson 285f66de3eeSBoris Pismenny /* We need these for tls_sw_fallback handling of other packets */ 286f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_SW) { 287dbe42559SDave Watson kfree(ctx->tx.rec_seq); 288dbe42559SDave Watson kfree(ctx->tx.iv); 289f66de3eeSBoris Pismenny tls_sw_free_resources_tx(sk); 290903f1a18SJakub Kicinski #ifdef CONFIG_TLS_DEVICE 29135b71a34SJakub Kicinski } else if (ctx->tx_conf == TLS_HW) { 29235b71a34SJakub Kicinski tls_device_free_resources_tx(sk); 293903f1a18SJakub Kicinski #endif 294f66de3eeSBoris Pismenny } 295f66de3eeSBoris Pismenny 296f66de3eeSBoris Pismenny if (ctx->rx_conf == TLS_SW) { 297c46234ebSDave Watson kfree(ctx->rx.rec_seq); 298c46234ebSDave Watson kfree(ctx->rx.iv); 299f66de3eeSBoris Pismenny tls_sw_free_resources_rx(sk); 300c46234ebSDave Watson } 3013c4d7559SDave Watson 302e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 3034799ac81SBoris Pismenny if (ctx->rx_conf == TLS_HW) 3044799ac81SBoris Pismenny tls_device_offload_cleanup_rx(sk); 3054799ac81SBoris Pismenny 3064799ac81SBoris Pismenny if (ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW) { 307e8f69799SIlya Lesokhin #else 308e8f69799SIlya Lesokhin { 309e8f69799SIlya Lesokhin #endif 31086029d10SSabrina Dubroca tls_ctx_free(ctx); 311e8f69799SIlya Lesokhin ctx = NULL; 312e8f69799SIlya Lesokhin } 313e8f69799SIlya Lesokhin 314ff45d820SIlya Lesokhin skip_tx_cleanup: 3153c4d7559SDave Watson release_sock(sk); 3163c4d7559SDave Watson sk_proto_close(sk, timeout); 317dd0bed16SAtul Gupta /* free ctx for TLS_HW_RECORD, used by tcp_set_state 318dd0bed16SAtul Gupta * for sk->sk_prot->unhash [tls_hw_unhash] 319dd0bed16SAtul Gupta */ 32098f0a395SEric Dumazet if (free_ctx) 32186029d10SSabrina Dubroca tls_ctx_free(ctx); 3223c4d7559SDave Watson } 3233c4d7559SDave Watson 3243c4d7559SDave Watson static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, 3253c4d7559SDave Watson int __user *optlen) 3263c4d7559SDave Watson { 3273c4d7559SDave Watson int rc = 0; 3283c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3293c4d7559SDave Watson struct tls_crypto_info *crypto_info; 3303c4d7559SDave Watson int len; 3313c4d7559SDave Watson 3323c4d7559SDave Watson if (get_user(len, optlen)) 3333c4d7559SDave Watson return -EFAULT; 3343c4d7559SDave Watson 3353c4d7559SDave Watson if (!optval || (len < sizeof(*crypto_info))) { 3363c4d7559SDave Watson rc = -EINVAL; 3373c4d7559SDave Watson goto out; 3383c4d7559SDave Watson } 3393c4d7559SDave Watson 3403c4d7559SDave Watson if (!ctx) { 3413c4d7559SDave Watson rc = -EBUSY; 3423c4d7559SDave Watson goto out; 3433c4d7559SDave Watson } 3443c4d7559SDave Watson 3453c4d7559SDave Watson /* get user crypto info */ 34686029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 3473c4d7559SDave Watson 3483c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3493c4d7559SDave Watson rc = -EBUSY; 3503c4d7559SDave Watson goto out; 3513c4d7559SDave Watson } 3523c4d7559SDave Watson 3535a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 354ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 355ac55cd61SDan Carpenter rc = -EFAULT; 3563c4d7559SDave Watson goto out; 3573c4d7559SDave Watson } 3583c4d7559SDave Watson 3593c4d7559SDave Watson switch (crypto_info->cipher_type) { 3603c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3613c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3623c4d7559SDave Watson crypto_info_aes_gcm_128 = 3633c4d7559SDave Watson container_of(crypto_info, 3643c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3653c4d7559SDave Watson info); 3663c4d7559SDave Watson 3673c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3683c4d7559SDave Watson rc = -EINVAL; 3693c4d7559SDave Watson goto out; 3703c4d7559SDave Watson } 3713c4d7559SDave Watson lock_sock(sk); 372a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 373dbe42559SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3743c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 375dbe42559SDave Watson memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq, 376c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3773c4d7559SDave Watson release_sock(sk); 378ac55cd61SDan Carpenter if (copy_to_user(optval, 3793c4d7559SDave Watson crypto_info_aes_gcm_128, 380ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 381ac55cd61SDan Carpenter rc = -EFAULT; 3823c4d7559SDave Watson break; 3833c4d7559SDave Watson } 384fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 385fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256 * 386fb99bce7SDave Watson crypto_info_aes_gcm_256 = 387fb99bce7SDave Watson container_of(crypto_info, 388fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256, 389fb99bce7SDave Watson info); 390fb99bce7SDave Watson 391fb99bce7SDave Watson if (len != sizeof(*crypto_info_aes_gcm_256)) { 392fb99bce7SDave Watson rc = -EINVAL; 393fb99bce7SDave Watson goto out; 394fb99bce7SDave Watson } 395fb99bce7SDave Watson lock_sock(sk); 396fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->iv, 397fb99bce7SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE, 398fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_IV_SIZE); 399fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->rec_seq, ctx->tx.rec_seq, 400fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE); 401fb99bce7SDave Watson release_sock(sk); 402fb99bce7SDave Watson if (copy_to_user(optval, 403fb99bce7SDave Watson crypto_info_aes_gcm_256, 404fb99bce7SDave Watson sizeof(*crypto_info_aes_gcm_256))) 405fb99bce7SDave Watson rc = -EFAULT; 406fb99bce7SDave Watson break; 407fb99bce7SDave Watson } 4083c4d7559SDave Watson default: 4093c4d7559SDave Watson rc = -EINVAL; 4103c4d7559SDave Watson } 4113c4d7559SDave Watson 4123c4d7559SDave Watson out: 4133c4d7559SDave Watson return rc; 4143c4d7559SDave Watson } 4153c4d7559SDave Watson 4163c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 4173c4d7559SDave Watson char __user *optval, int __user *optlen) 4183c4d7559SDave Watson { 4193c4d7559SDave Watson int rc = 0; 4203c4d7559SDave Watson 4213c4d7559SDave Watson switch (optname) { 4223c4d7559SDave Watson case TLS_TX: 4233c4d7559SDave Watson rc = do_tls_getsockopt_tx(sk, optval, optlen); 4243c4d7559SDave Watson break; 4253c4d7559SDave Watson default: 4263c4d7559SDave Watson rc = -ENOPROTOOPT; 4273c4d7559SDave Watson break; 4283c4d7559SDave Watson } 4293c4d7559SDave Watson return rc; 4303c4d7559SDave Watson } 4313c4d7559SDave Watson 4323c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 4333c4d7559SDave Watson char __user *optval, int __user *optlen) 4343c4d7559SDave Watson { 4353c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4363c4d7559SDave Watson 4373c4d7559SDave Watson if (level != SOL_TLS) 4383c4d7559SDave Watson return ctx->getsockopt(sk, level, optname, optval, optlen); 4393c4d7559SDave Watson 4403c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 4413c4d7559SDave Watson } 4423c4d7559SDave Watson 443c46234ebSDave Watson static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval, 444c46234ebSDave Watson unsigned int optlen, int tx) 4453c4d7559SDave Watson { 446196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 4474509de14SVakul Garg struct tls_crypto_info *alt_crypto_info; 4483c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 449fb99bce7SDave Watson size_t optsize; 4503c4d7559SDave Watson int rc = 0; 45158371585SDave Watson int conf; 4523c4d7559SDave Watson 4533c4d7559SDave Watson if (!optval || (optlen < sizeof(*crypto_info))) { 4543c4d7559SDave Watson rc = -EINVAL; 4553c4d7559SDave Watson goto out; 4563c4d7559SDave Watson } 4573c4d7559SDave Watson 4584509de14SVakul Garg if (tx) { 45986029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 4604509de14SVakul Garg alt_crypto_info = &ctx->crypto_recv.info; 4614509de14SVakul Garg } else { 46286029d10SSabrina Dubroca crypto_info = &ctx->crypto_recv.info; 4634509de14SVakul Garg alt_crypto_info = &ctx->crypto_send.info; 4644509de14SVakul Garg } 465c46234ebSDave Watson 466196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 467877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 468877d17c7SSabrina Dubroca rc = -EBUSY; 469196c31b4SIlya Lesokhin goto out; 470877d17c7SSabrina Dubroca } 471196c31b4SIlya Lesokhin 472196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); 4733c4d7559SDave Watson if (rc) { 4743c4d7559SDave Watson rc = -EFAULT; 475257082e6SBoris Pismenny goto err_crypto_info; 4763c4d7559SDave Watson } 4773c4d7559SDave Watson 4783c4d7559SDave Watson /* check version */ 479130b392cSDave Watson if (crypto_info->version != TLS_1_2_VERSION && 480130b392cSDave Watson crypto_info->version != TLS_1_3_VERSION) { 4813c4d7559SDave Watson rc = -ENOTSUPP; 482196c31b4SIlya Lesokhin goto err_crypto_info; 4833c4d7559SDave Watson } 4843c4d7559SDave Watson 4854509de14SVakul Garg /* Ensure that TLS version and ciphers are same in both directions */ 4864509de14SVakul Garg if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { 4874509de14SVakul Garg if (alt_crypto_info->version != crypto_info->version || 4884509de14SVakul Garg alt_crypto_info->cipher_type != crypto_info->cipher_type) { 4894509de14SVakul Garg rc = -EINVAL; 4904509de14SVakul Garg goto err_crypto_info; 4914509de14SVakul Garg } 4924509de14SVakul Garg } 4934509de14SVakul Garg 494196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 495fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_128: 496fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 497fb99bce7SDave Watson optsize = crypto_info->cipher_type == TLS_CIPHER_AES_GCM_128 ? 498fb99bce7SDave Watson sizeof(struct tls12_crypto_info_aes_gcm_128) : 499fb99bce7SDave Watson sizeof(struct tls12_crypto_info_aes_gcm_256); 500fb99bce7SDave Watson if (optlen != optsize) { 5013c4d7559SDave Watson rc = -EINVAL; 5026db959c8SSabrina Dubroca goto err_crypto_info; 5033c4d7559SDave Watson } 504196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info), 505196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 5063c4d7559SDave Watson if (rc) { 5073c4d7559SDave Watson rc = -EFAULT; 5083c4d7559SDave Watson goto err_crypto_info; 5093c4d7559SDave Watson } 5103c4d7559SDave Watson break; 5113c4d7559SDave Watson } 5123c4d7559SDave Watson default: 5133c4d7559SDave Watson rc = -EINVAL; 5146db959c8SSabrina Dubroca goto err_crypto_info; 5153c4d7559SDave Watson } 5163c4d7559SDave Watson 517c46234ebSDave Watson if (tx) { 518e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 519e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 520e8f69799SIlya Lesokhin conf = TLS_HW; 521e8f69799SIlya Lesokhin if (rc) { 522e8f69799SIlya Lesokhin #else 523e8f69799SIlya Lesokhin { 524e8f69799SIlya Lesokhin #endif 525c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 526f66de3eeSBoris Pismenny conf = TLS_SW; 527e8f69799SIlya Lesokhin } 528c46234ebSDave Watson } else { 5294799ac81SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 5304799ac81SBoris Pismenny rc = tls_set_device_offload_rx(sk, ctx); 5314799ac81SBoris Pismenny conf = TLS_HW; 5324799ac81SBoris Pismenny if (rc) { 5334799ac81SBoris Pismenny #else 5344799ac81SBoris Pismenny { 5354799ac81SBoris Pismenny #endif 536c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 537f66de3eeSBoris Pismenny conf = TLS_SW; 538c46234ebSDave Watson } 5394799ac81SBoris Pismenny } 540c46234ebSDave Watson 5413c4d7559SDave Watson if (rc) 5423c4d7559SDave Watson goto err_crypto_info; 5433c4d7559SDave Watson 544f66de3eeSBoris Pismenny if (tx) 545f66de3eeSBoris Pismenny ctx->tx_conf = conf; 546f66de3eeSBoris Pismenny else 547f66de3eeSBoris Pismenny ctx->rx_conf = conf; 5486d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 549c46234ebSDave Watson if (tx) { 550ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 551ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 552c46234ebSDave Watson } else { 553c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 554c46234ebSDave Watson } 5553c4d7559SDave Watson goto out; 5563c4d7559SDave Watson 5573c4d7559SDave Watson err_crypto_info: 558c844eb46SSabrina Dubroca memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); 5593c4d7559SDave Watson out: 5603c4d7559SDave Watson return rc; 5613c4d7559SDave Watson } 5623c4d7559SDave Watson 5633c4d7559SDave Watson static int do_tls_setsockopt(struct sock *sk, int optname, 5643c4d7559SDave Watson char __user *optval, unsigned int optlen) 5653c4d7559SDave Watson { 5663c4d7559SDave Watson int rc = 0; 5673c4d7559SDave Watson 5683c4d7559SDave Watson switch (optname) { 5693c4d7559SDave Watson case TLS_TX: 570c46234ebSDave Watson case TLS_RX: 5713c4d7559SDave Watson lock_sock(sk); 572c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 573c46234ebSDave Watson optname == TLS_TX); 5743c4d7559SDave Watson release_sock(sk); 5753c4d7559SDave Watson break; 5763c4d7559SDave Watson default: 5773c4d7559SDave Watson rc = -ENOPROTOOPT; 5783c4d7559SDave Watson break; 5793c4d7559SDave Watson } 5803c4d7559SDave Watson return rc; 5813c4d7559SDave Watson } 5823c4d7559SDave Watson 5833c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 5843c4d7559SDave Watson char __user *optval, unsigned int optlen) 5853c4d7559SDave Watson { 5863c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 5873c4d7559SDave Watson 5883c4d7559SDave Watson if (level != SOL_TLS) 5893c4d7559SDave Watson return ctx->setsockopt(sk, level, optname, optval, optlen); 5903c4d7559SDave Watson 5913c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 5923c4d7559SDave Watson } 5933c4d7559SDave Watson 594dd0bed16SAtul Gupta static struct tls_context *create_ctx(struct sock *sk) 595dd0bed16SAtul Gupta { 596dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 597dd0bed16SAtul Gupta struct tls_context *ctx; 598dd0bed16SAtul Gupta 599c6ec179aSGanesh Goudar ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); 600dd0bed16SAtul Gupta if (!ctx) 601dd0bed16SAtul Gupta return NULL; 602dd0bed16SAtul Gupta 603dd0bed16SAtul Gupta icsk->icsk_ulp_data = ctx; 6046c0563e4SAtul Gupta ctx->setsockopt = sk->sk_prot->setsockopt; 6056c0563e4SAtul Gupta ctx->getsockopt = sk->sk_prot->getsockopt; 6066c0563e4SAtul Gupta ctx->sk_proto_close = sk->sk_prot->close; 607dd0bed16SAtul Gupta return ctx; 608dd0bed16SAtul Gupta } 609dd0bed16SAtul Gupta 61063a6b3feSAtul Gupta static void tls_build_proto(struct sock *sk) 61163a6b3feSAtul Gupta { 61263a6b3feSAtul Gupta int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 61363a6b3feSAtul Gupta 61463a6b3feSAtul Gupta /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 61563a6b3feSAtul Gupta if (ip_ver == TLSV6 && 61663a6b3feSAtul Gupta unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) { 61763a6b3feSAtul Gupta mutex_lock(&tcpv6_prot_mutex); 61863a6b3feSAtul Gupta if (likely(sk->sk_prot != saved_tcpv6_prot)) { 61963a6b3feSAtul Gupta build_protos(tls_prots[TLSV6], sk->sk_prot); 62063a6b3feSAtul Gupta smp_store_release(&saved_tcpv6_prot, sk->sk_prot); 62163a6b3feSAtul Gupta } 62263a6b3feSAtul Gupta mutex_unlock(&tcpv6_prot_mutex); 62363a6b3feSAtul Gupta } 62463a6b3feSAtul Gupta 62563a6b3feSAtul Gupta if (ip_ver == TLSV4 && 62663a6b3feSAtul Gupta unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv4_prot))) { 62763a6b3feSAtul Gupta mutex_lock(&tcpv4_prot_mutex); 62863a6b3feSAtul Gupta if (likely(sk->sk_prot != saved_tcpv4_prot)) { 62963a6b3feSAtul Gupta build_protos(tls_prots[TLSV4], sk->sk_prot); 63063a6b3feSAtul Gupta smp_store_release(&saved_tcpv4_prot, sk->sk_prot); 63163a6b3feSAtul Gupta } 63263a6b3feSAtul Gupta mutex_unlock(&tcpv4_prot_mutex); 63363a6b3feSAtul Gupta } 63463a6b3feSAtul Gupta } 63563a6b3feSAtul Gupta 63676f7164dSAtul Gupta static void tls_hw_sk_destruct(struct sock *sk) 63776f7164dSAtul Gupta { 63876f7164dSAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 63976f7164dSAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 64076f7164dSAtul Gupta 64176f7164dSAtul Gupta ctx->sk_destruct(sk); 64276f7164dSAtul Gupta /* Free ctx */ 64376f7164dSAtul Gupta kfree(ctx); 64476f7164dSAtul Gupta icsk->icsk_ulp_data = NULL; 64576f7164dSAtul Gupta } 64676f7164dSAtul Gupta 647dd0bed16SAtul Gupta static int tls_hw_prot(struct sock *sk) 648dd0bed16SAtul Gupta { 649dd0bed16SAtul Gupta struct tls_context *ctx; 650dd0bed16SAtul Gupta struct tls_device *dev; 651dd0bed16SAtul Gupta int rc = 0; 652dd0bed16SAtul Gupta 653df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 654dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 655dd0bed16SAtul Gupta if (dev->feature && dev->feature(dev)) { 656dd0bed16SAtul Gupta ctx = create_ctx(sk); 657dd0bed16SAtul Gupta if (!ctx) 658dd0bed16SAtul Gupta goto out; 659dd0bed16SAtul Gupta 66063a6b3feSAtul Gupta spin_unlock_bh(&device_spinlock); 66163a6b3feSAtul Gupta tls_build_proto(sk); 662dd0bed16SAtul Gupta ctx->hash = sk->sk_prot->hash; 663dd0bed16SAtul Gupta ctx->unhash = sk->sk_prot->unhash; 664dd0bed16SAtul Gupta ctx->sk_proto_close = sk->sk_prot->close; 66576f7164dSAtul Gupta ctx->sk_destruct = sk->sk_destruct; 66676f7164dSAtul Gupta sk->sk_destruct = tls_hw_sk_destruct; 667f66de3eeSBoris Pismenny ctx->rx_conf = TLS_HW_RECORD; 668f66de3eeSBoris Pismenny ctx->tx_conf = TLS_HW_RECORD; 669dd0bed16SAtul Gupta update_sk_prot(sk, ctx); 67063a6b3feSAtul Gupta spin_lock_bh(&device_spinlock); 671dd0bed16SAtul Gupta rc = 1; 672dd0bed16SAtul Gupta break; 673dd0bed16SAtul Gupta } 674dd0bed16SAtul Gupta } 675dd0bed16SAtul Gupta out: 676df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 677dd0bed16SAtul Gupta return rc; 678dd0bed16SAtul Gupta } 679dd0bed16SAtul Gupta 680dd0bed16SAtul Gupta static void tls_hw_unhash(struct sock *sk) 681dd0bed16SAtul Gupta { 682dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 683dd0bed16SAtul Gupta struct tls_device *dev; 684dd0bed16SAtul Gupta 685df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 686dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 687df9d4a17SAtul Gupta if (dev->unhash) { 688df9d4a17SAtul Gupta kref_get(&dev->kref); 689df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 690dd0bed16SAtul Gupta dev->unhash(dev, sk); 691df9d4a17SAtul Gupta kref_put(&dev->kref, dev->release); 692df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 693dd0bed16SAtul Gupta } 694df9d4a17SAtul Gupta } 695df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 696dd0bed16SAtul Gupta ctx->unhash(sk); 697dd0bed16SAtul Gupta } 698dd0bed16SAtul Gupta 699dd0bed16SAtul Gupta static int tls_hw_hash(struct sock *sk) 700dd0bed16SAtul Gupta { 701dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 702dd0bed16SAtul Gupta struct tls_device *dev; 703dd0bed16SAtul Gupta int err; 704dd0bed16SAtul Gupta 705dd0bed16SAtul Gupta err = ctx->hash(sk); 706df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 707dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 708df9d4a17SAtul Gupta if (dev->hash) { 709df9d4a17SAtul Gupta kref_get(&dev->kref); 710df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 711dd0bed16SAtul Gupta err |= dev->hash(dev, sk); 712df9d4a17SAtul Gupta kref_put(&dev->kref, dev->release); 713df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 714dd0bed16SAtul Gupta } 715df9d4a17SAtul Gupta } 716df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 717dd0bed16SAtul Gupta 718dd0bed16SAtul Gupta if (err) 719dd0bed16SAtul Gupta tls_hw_unhash(sk); 720dd0bed16SAtul Gupta return err; 721dd0bed16SAtul Gupta } 722dd0bed16SAtul Gupta 723f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 724f66de3eeSBoris Pismenny struct proto *base) 725c113187dSBoris Pismenny { 726f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 727f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 728f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 729f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 730c113187dSBoris Pismenny 731f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 732f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 733f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 734c46234ebSDave Watson 735f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 736f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 737924ad65eSJohn Fastabend prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read; 738f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 739c46234ebSDave Watson 740f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 741f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 742924ad65eSJohn Fastabend prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read; 743f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 744dd0bed16SAtul Gupta 745e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 746e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 747e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 748e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 749e8f69799SIlya Lesokhin 750e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 751e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 752e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 7534799ac81SBoris Pismenny 7544799ac81SBoris Pismenny prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; 7554799ac81SBoris Pismenny 7564799ac81SBoris Pismenny prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; 7574799ac81SBoris Pismenny 7584799ac81SBoris Pismenny prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; 759e8f69799SIlya Lesokhin #endif 760e8f69799SIlya Lesokhin 761f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 762f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_hw_hash; 763f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_hw_unhash; 764f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].close = tls_sk_proto_close; 765c113187dSBoris Pismenny } 766c113187dSBoris Pismenny 7673c4d7559SDave Watson static int tls_init(struct sock *sk) 7683c4d7559SDave Watson { 7693c4d7559SDave Watson struct tls_context *ctx; 7703c4d7559SDave Watson int rc = 0; 7713c4d7559SDave Watson 772dd0bed16SAtul Gupta if (tls_hw_prot(sk)) 773dd0bed16SAtul Gupta goto out; 774dd0bed16SAtul Gupta 775d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 776d91c3e17SIlya Lesokhin * in ESTABLISHED state. 777d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 778d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 779d91c3e17SIlya Lesokhin * share the ulp context. 780d91c3e17SIlya Lesokhin */ 781d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 782d91c3e17SIlya Lesokhin return -ENOTSUPP; 783d91c3e17SIlya Lesokhin 7843c4d7559SDave Watson /* allocate tls context */ 785dd0bed16SAtul Gupta ctx = create_ctx(sk); 7863c4d7559SDave Watson if (!ctx) { 7873c4d7559SDave Watson rc = -ENOMEM; 7883c4d7559SDave Watson goto out; 7893c4d7559SDave Watson } 7906d88207fSIlya Lesokhin 79163a6b3feSAtul Gupta tls_build_proto(sk); 792f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 793f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 7946d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 7953c4d7559SDave Watson out: 7963c4d7559SDave Watson return rc; 7973c4d7559SDave Watson } 7983c4d7559SDave Watson 799dd0bed16SAtul Gupta void tls_register_device(struct tls_device *device) 800dd0bed16SAtul Gupta { 801df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 802dd0bed16SAtul Gupta list_add_tail(&device->dev_list, &device_list); 803df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 804dd0bed16SAtul Gupta } 805dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_register_device); 806dd0bed16SAtul Gupta 807dd0bed16SAtul Gupta void tls_unregister_device(struct tls_device *device) 808dd0bed16SAtul Gupta { 809df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 810dd0bed16SAtul Gupta list_del(&device->dev_list); 811df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 812dd0bed16SAtul Gupta } 813dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_unregister_device); 814dd0bed16SAtul Gupta 8153c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 8163c4d7559SDave Watson .name = "tls", 8173c4d7559SDave Watson .owner = THIS_MODULE, 8183c4d7559SDave Watson .init = tls_init, 8193c4d7559SDave Watson }; 8203c4d7559SDave Watson 8213c4d7559SDave Watson static int __init tls_register(void) 8223c4d7559SDave Watson { 823c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 824c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 825c46234ebSDave Watson 826e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 827e8f69799SIlya Lesokhin tls_device_init(); 828e8f69799SIlya Lesokhin #endif 8293c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 8303c4d7559SDave Watson 8313c4d7559SDave Watson return 0; 8323c4d7559SDave Watson } 8333c4d7559SDave Watson 8343c4d7559SDave Watson static void __exit tls_unregister(void) 8353c4d7559SDave Watson { 8363c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 837e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 838e8f69799SIlya Lesokhin tls_device_cleanup(); 839e8f69799SIlya Lesokhin #endif 8403c4d7559SDave Watson } 8413c4d7559SDave Watson 8423c4d7559SDave Watson module_init(tls_register); 8433c4d7559SDave Watson module_exit(tls_unregister); 844