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> 4226811cc9SDavide Caratti #include <linux/inet_diag.h> 433c4d7559SDave Watson 44d26b698dSJakub Kicinski #include <net/snmp.h> 453c4d7559SDave Watson #include <net/tls.h> 4625a3cd81SJakub Kicinski #include <net/tls_toe.h> 473c4d7559SDave Watson 483c4d7559SDave Watson MODULE_AUTHOR("Mellanox Technologies"); 493c4d7559SDave Watson MODULE_DESCRIPTION("Transport Layer Security Support"); 503c4d7559SDave Watson MODULE_LICENSE("Dual BSD/GPL"); 51037b0b86SDaniel Borkmann MODULE_ALIAS_TCP_ULP("tls"); 523c4d7559SDave Watson 536d88207fSIlya Lesokhin enum { 54c113187dSBoris Pismenny TLSV4, 55c113187dSBoris Pismenny TLSV6, 56c113187dSBoris Pismenny TLS_NUM_PROTS, 57c113187dSBoris Pismenny }; 586d88207fSIlya Lesokhin 59f691a25cSArnd Bergmann static const struct proto *saved_tcpv6_prot; 60c113187dSBoris Pismenny static DEFINE_MUTEX(tcpv6_prot_mutex); 61f691a25cSArnd Bergmann static const struct proto *saved_tcpv4_prot; 6228cb6f1eSJohn Fastabend static DEFINE_MUTEX(tcpv4_prot_mutex); 63f66de3eeSBoris Pismenny static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; 64c46234ebSDave Watson static struct proto_ops tls_sw_proto_ops; 6563a6b3feSAtul Gupta static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 66f13fe3e6SJakub Sitnicki const struct proto *base); 676d88207fSIlya Lesokhin 6808700dabSJakub Kicinski void update_sk_prot(struct sock *sk, struct tls_context *ctx) 696d88207fSIlya Lesokhin { 70c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 71c113187dSBoris Pismenny 72d5bee737SJakub Sitnicki WRITE_ONCE(sk->sk_prot, 73d5bee737SJakub Sitnicki &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]); 746d88207fSIlya Lesokhin } 753c4d7559SDave Watson 763c4d7559SDave Watson int wait_on_pending_writer(struct sock *sk, long *timeo) 773c4d7559SDave Watson { 783c4d7559SDave Watson int rc = 0; 793c4d7559SDave Watson DEFINE_WAIT_FUNC(wait, woken_wake_function); 803c4d7559SDave Watson 813c4d7559SDave Watson add_wait_queue(sk_sleep(sk), &wait); 823c4d7559SDave Watson while (1) { 833c4d7559SDave Watson if (!*timeo) { 843c4d7559SDave Watson rc = -EAGAIN; 853c4d7559SDave Watson break; 863c4d7559SDave Watson } 873c4d7559SDave Watson 883c4d7559SDave Watson if (signal_pending(current)) { 893c4d7559SDave Watson rc = sock_intr_errno(*timeo); 903c4d7559SDave Watson break; 913c4d7559SDave Watson } 923c4d7559SDave Watson 933c4d7559SDave Watson if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) 943c4d7559SDave Watson break; 953c4d7559SDave Watson } 963c4d7559SDave Watson remove_wait_queue(sk_sleep(sk), &wait); 973c4d7559SDave Watson return rc; 983c4d7559SDave Watson } 993c4d7559SDave Watson 1003c4d7559SDave Watson int tls_push_sg(struct sock *sk, 1013c4d7559SDave Watson struct tls_context *ctx, 1023c4d7559SDave Watson struct scatterlist *sg, 1033c4d7559SDave Watson u16 first_offset, 1043c4d7559SDave Watson int flags) 1053c4d7559SDave Watson { 1063c4d7559SDave Watson int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; 1073c4d7559SDave Watson int ret = 0; 1083c4d7559SDave Watson struct page *p; 1093c4d7559SDave Watson size_t size; 1103c4d7559SDave Watson int offset = first_offset; 1113c4d7559SDave Watson 1123c4d7559SDave Watson size = sg->length - offset; 1133c4d7559SDave Watson offset += sg->offset; 1143c4d7559SDave Watson 115c212d2c7SDave Watson ctx->in_tcp_sendpages = true; 1163c4d7559SDave Watson while (1) { 1173c4d7559SDave Watson if (sg_is_last(sg)) 1183c4d7559SDave Watson sendpage_flags = flags; 1193c4d7559SDave Watson 1203c4d7559SDave Watson /* is sending application-limited? */ 1213c4d7559SDave Watson tcp_rate_check_app_limited(sk); 1223c4d7559SDave Watson p = sg_page(sg); 1233c4d7559SDave Watson retry: 1243c4d7559SDave Watson ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); 1253c4d7559SDave Watson 1263c4d7559SDave Watson if (ret != size) { 1273c4d7559SDave Watson if (ret > 0) { 1283c4d7559SDave Watson offset += ret; 1293c4d7559SDave Watson size -= ret; 1303c4d7559SDave Watson goto retry; 1313c4d7559SDave Watson } 1323c4d7559SDave Watson 1333c4d7559SDave Watson offset -= sg->offset; 1343c4d7559SDave Watson ctx->partially_sent_offset = offset; 1353c4d7559SDave Watson ctx->partially_sent_record = (void *)sg; 136080324c3SAndre Tomt ctx->in_tcp_sendpages = false; 1373c4d7559SDave Watson return ret; 1383c4d7559SDave Watson } 1393c4d7559SDave Watson 1403c4d7559SDave Watson put_page(p); 1413c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 1423c4d7559SDave Watson sg = sg_next(sg); 1433c4d7559SDave Watson if (!sg) 1443c4d7559SDave Watson break; 1453c4d7559SDave Watson 1463c4d7559SDave Watson offset = sg->offset; 1473c4d7559SDave Watson size = sg->length; 1483c4d7559SDave Watson } 1493c4d7559SDave Watson 150c212d2c7SDave Watson ctx->in_tcp_sendpages = false; 1513c4d7559SDave Watson 1523c4d7559SDave Watson return 0; 1533c4d7559SDave Watson } 1543c4d7559SDave Watson 1553c4d7559SDave Watson static int tls_handle_open_record(struct sock *sk, int flags) 1563c4d7559SDave Watson { 1573c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 1583c4d7559SDave Watson 1593c4d7559SDave Watson if (tls_is_pending_open_record(ctx)) 1603c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 1613c4d7559SDave Watson 1623c4d7559SDave Watson return 0; 1633c4d7559SDave Watson } 1643c4d7559SDave Watson 1653c4d7559SDave Watson int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 1663c4d7559SDave Watson unsigned char *record_type) 1673c4d7559SDave Watson { 1683c4d7559SDave Watson struct cmsghdr *cmsg; 1693c4d7559SDave Watson int rc = -EINVAL; 1703c4d7559SDave Watson 1713c4d7559SDave Watson for_each_cmsghdr(cmsg, msg) { 1723c4d7559SDave Watson if (!CMSG_OK(msg, cmsg)) 1733c4d7559SDave Watson return -EINVAL; 1743c4d7559SDave Watson if (cmsg->cmsg_level != SOL_TLS) 1753c4d7559SDave Watson continue; 1763c4d7559SDave Watson 1773c4d7559SDave Watson switch (cmsg->cmsg_type) { 1783c4d7559SDave Watson case TLS_SET_RECORD_TYPE: 1793c4d7559SDave Watson if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) 1803c4d7559SDave Watson return -EINVAL; 1813c4d7559SDave Watson 1823c4d7559SDave Watson if (msg->msg_flags & MSG_MORE) 1833c4d7559SDave Watson return -EINVAL; 1843c4d7559SDave Watson 1853c4d7559SDave Watson rc = tls_handle_open_record(sk, msg->msg_flags); 1863c4d7559SDave Watson if (rc) 1873c4d7559SDave Watson return rc; 1883c4d7559SDave Watson 1893c4d7559SDave Watson *record_type = *(unsigned char *)CMSG_DATA(cmsg); 1903c4d7559SDave Watson rc = 0; 1913c4d7559SDave Watson break; 1923c4d7559SDave Watson default: 1933c4d7559SDave Watson return -EINVAL; 1943c4d7559SDave Watson } 1953c4d7559SDave Watson } 1963c4d7559SDave Watson 1973c4d7559SDave Watson return rc; 1983c4d7559SDave Watson } 1993c4d7559SDave Watson 200a42055e8SVakul Garg int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 201a42055e8SVakul Garg int flags) 2023c4d7559SDave Watson { 2033c4d7559SDave Watson struct scatterlist *sg; 2043c4d7559SDave Watson u16 offset; 2053c4d7559SDave Watson 2063c4d7559SDave Watson sg = ctx->partially_sent_record; 2073c4d7559SDave Watson offset = ctx->partially_sent_offset; 2083c4d7559SDave Watson 2093c4d7559SDave Watson ctx->partially_sent_record = NULL; 2103c4d7559SDave Watson return tls_push_sg(sk, ctx, sg, offset, flags); 2113c4d7559SDave Watson } 2123c4d7559SDave Watson 213c5daa6ccSJakub Kicinski void tls_free_partial_record(struct sock *sk, struct tls_context *ctx) 21435b71a34SJakub Kicinski { 21535b71a34SJakub Kicinski struct scatterlist *sg; 21635b71a34SJakub Kicinski 217c5daa6ccSJakub Kicinski for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) { 21835b71a34SJakub Kicinski put_page(sg_page(sg)); 21935b71a34SJakub Kicinski sk_mem_uncharge(sk, sg->length); 22035b71a34SJakub Kicinski } 22135b71a34SJakub Kicinski ctx->partially_sent_record = NULL; 22235b71a34SJakub Kicinski } 22335b71a34SJakub Kicinski 2243c4d7559SDave Watson static void tls_write_space(struct sock *sk) 2253c4d7559SDave Watson { 2263c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2273c4d7559SDave Watson 22867db7cd2SJohn Fastabend /* If in_tcp_sendpages call lower protocol write space handler 22967db7cd2SJohn Fastabend * to ensure we wake up any waiting operations there. For example 23067db7cd2SJohn Fastabend * if do_tcp_sendpages where to call sk_wait_event. 23167db7cd2SJohn Fastabend */ 23267db7cd2SJohn Fastabend if (ctx->in_tcp_sendpages) { 23367db7cd2SJohn Fastabend ctx->sk_write_space(sk); 234c212d2c7SDave Watson return; 23567db7cd2SJohn Fastabend } 236c212d2c7SDave Watson 2377463d3a2SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 2387463d3a2SBoris Pismenny if (ctx->tx_conf == TLS_HW) 2397463d3a2SBoris Pismenny tls_device_write_space(sk, ctx); 2407463d3a2SBoris Pismenny else 2417463d3a2SBoris Pismenny #endif 2427463d3a2SBoris Pismenny tls_sw_write_space(sk, ctx); 2434504ab0eSVakul Garg 2444504ab0eSVakul Garg ctx->sk_write_space(sk); 2453c4d7559SDave Watson } 2463c4d7559SDave Watson 24715a7dea7SJakub Kicinski /** 24815a7dea7SJakub Kicinski * tls_ctx_free() - free TLS ULP context 24915a7dea7SJakub Kicinski * @sk: socket to with @ctx is attached 25015a7dea7SJakub Kicinski * @ctx: TLS context structure 25115a7dea7SJakub Kicinski * 25215a7dea7SJakub Kicinski * Free TLS context. If @sk is %NULL caller guarantees that the socket 25315a7dea7SJakub Kicinski * to which @ctx was attached has no outstanding references. 25415a7dea7SJakub Kicinski */ 25515a7dea7SJakub Kicinski void tls_ctx_free(struct sock *sk, struct tls_context *ctx) 25686029d10SSabrina Dubroca { 25786029d10SSabrina Dubroca if (!ctx) 25886029d10SSabrina Dubroca return; 25986029d10SSabrina Dubroca 26086029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); 26186029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); 26279ffe608SJakub Kicinski mutex_destroy(&ctx->tx_lock); 26315a7dea7SJakub Kicinski 26415a7dea7SJakub Kicinski if (sk) 26515a7dea7SJakub Kicinski kfree_rcu(ctx, rcu); 26615a7dea7SJakub Kicinski else 26786029d10SSabrina Dubroca kfree(ctx); 26886029d10SSabrina Dubroca } 26986029d10SSabrina Dubroca 270313ab004SJohn Fastabend static void tls_sk_proto_cleanup(struct sock *sk, 271313ab004SJohn Fastabend struct tls_context *ctx, long timeo) 2723c4d7559SDave Watson { 2739354544cSDirk van der Merwe if (unlikely(sk->sk_write_pending) && 2749354544cSDirk van der Merwe !wait_on_pending_writer(sk, &timeo)) 2753c4d7559SDave Watson tls_handle_open_record(sk, 0); 2763c4d7559SDave Watson 277f66de3eeSBoris Pismenny /* We need these for tls_sw_fallback handling of other packets */ 278f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_SW) { 279dbe42559SDave Watson kfree(ctx->tx.rec_seq); 280dbe42559SDave Watson kfree(ctx->tx.iv); 281313ab004SJohn Fastabend tls_sw_release_resources_tx(sk); 282b32fd3ccSJakub Kicinski TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); 28335b71a34SJakub Kicinski } else if (ctx->tx_conf == TLS_HW) { 28435b71a34SJakub Kicinski tls_device_free_resources_tx(sk); 285b32fd3ccSJakub Kicinski TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); 286f66de3eeSBoris Pismenny } 287f66de3eeSBoris Pismenny 288b32fd3ccSJakub Kicinski if (ctx->rx_conf == TLS_SW) { 289313ab004SJohn Fastabend tls_sw_release_resources_rx(sk); 290b32fd3ccSJakub Kicinski TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); 291b32fd3ccSJakub Kicinski } else if (ctx->rx_conf == TLS_HW) { 2924799ac81SBoris Pismenny tls_device_offload_cleanup_rx(sk); 293b32fd3ccSJakub Kicinski TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); 294b32fd3ccSJakub Kicinski } 295e8f69799SIlya Lesokhin } 296e8f69799SIlya Lesokhin 297313ab004SJohn Fastabend static void tls_sk_proto_close(struct sock *sk, long timeout) 298313ab004SJohn Fastabend { 29995fa1454SJohn Fastabend struct inet_connection_sock *icsk = inet_csk(sk); 300313ab004SJohn Fastabend struct tls_context *ctx = tls_get_ctx(sk); 301313ab004SJohn Fastabend long timeo = sock_sndtimeo(sk, 0); 302313ab004SJohn Fastabend bool free_ctx; 303313ab004SJohn Fastabend 304313ab004SJohn Fastabend if (ctx->tx_conf == TLS_SW) 305313ab004SJohn Fastabend tls_sw_cancel_work_tx(ctx); 306313ab004SJohn Fastabend 307313ab004SJohn Fastabend lock_sock(sk); 308313ab004SJohn Fastabend free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW; 309313ab004SJohn Fastabend 310313ab004SJohn Fastabend if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE) 311313ab004SJohn Fastabend tls_sk_proto_cleanup(sk, ctx, timeo); 312313ab004SJohn Fastabend 31395fa1454SJohn Fastabend write_lock_bh(&sk->sk_callback_lock); 31495fa1454SJohn Fastabend if (free_ctx) 31515a7dea7SJakub Kicinski rcu_assign_pointer(icsk->icsk_ulp_data, NULL); 316d5bee737SJakub Sitnicki WRITE_ONCE(sk->sk_prot, ctx->sk_proto); 317d85f0177SJohn Fastabend if (sk->sk_write_space == tls_write_space) 31857c722e9SJakub Kicinski sk->sk_write_space = ctx->sk_write_space; 31995fa1454SJohn Fastabend write_unlock_bh(&sk->sk_callback_lock); 3203c4d7559SDave Watson release_sock(sk); 321313ab004SJohn Fastabend if (ctx->tx_conf == TLS_SW) 322313ab004SJohn Fastabend tls_sw_free_ctx_tx(ctx); 323313ab004SJohn Fastabend if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) 324313ab004SJohn Fastabend tls_sw_strparser_done(ctx); 325313ab004SJohn Fastabend if (ctx->rx_conf == TLS_SW) 326313ab004SJohn Fastabend tls_sw_free_ctx_rx(ctx); 327be7bbea1SJakub Kicinski ctx->sk_proto->close(sk, timeout); 328313ab004SJohn Fastabend 32998f0a395SEric Dumazet if (free_ctx) 33015a7dea7SJakub Kicinski tls_ctx_free(sk, ctx); 3313c4d7559SDave Watson } 3323c4d7559SDave Watson 3333c4d7559SDave Watson static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, 3343c4d7559SDave Watson int __user *optlen) 3353c4d7559SDave Watson { 3363c4d7559SDave Watson int rc = 0; 3373c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3383c4d7559SDave Watson struct tls_crypto_info *crypto_info; 3393c4d7559SDave Watson int len; 3403c4d7559SDave Watson 3413c4d7559SDave Watson if (get_user(len, optlen)) 3423c4d7559SDave Watson return -EFAULT; 3433c4d7559SDave Watson 3443c4d7559SDave Watson if (!optval || (len < sizeof(*crypto_info))) { 3453c4d7559SDave Watson rc = -EINVAL; 3463c4d7559SDave Watson goto out; 3473c4d7559SDave Watson } 3483c4d7559SDave Watson 3493c4d7559SDave Watson if (!ctx) { 3503c4d7559SDave Watson rc = -EBUSY; 3513c4d7559SDave Watson goto out; 3523c4d7559SDave Watson } 3533c4d7559SDave Watson 3543c4d7559SDave Watson /* get user crypto info */ 35586029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 3563c4d7559SDave Watson 3573c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3583c4d7559SDave Watson rc = -EBUSY; 3593c4d7559SDave Watson goto out; 3603c4d7559SDave Watson } 3613c4d7559SDave Watson 3625a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 363ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 364ac55cd61SDan Carpenter rc = -EFAULT; 3653c4d7559SDave Watson goto out; 3663c4d7559SDave Watson } 3673c4d7559SDave Watson 3683c4d7559SDave Watson switch (crypto_info->cipher_type) { 3693c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3703c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3713c4d7559SDave Watson crypto_info_aes_gcm_128 = 3723c4d7559SDave Watson container_of(crypto_info, 3733c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3743c4d7559SDave Watson info); 3753c4d7559SDave Watson 3763c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3773c4d7559SDave Watson rc = -EINVAL; 3783c4d7559SDave Watson goto out; 3793c4d7559SDave Watson } 3803c4d7559SDave Watson lock_sock(sk); 381a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 382dbe42559SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3833c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 384dbe42559SDave Watson memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq, 385c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3863c4d7559SDave Watson release_sock(sk); 387ac55cd61SDan Carpenter if (copy_to_user(optval, 3883c4d7559SDave Watson crypto_info_aes_gcm_128, 389ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 390ac55cd61SDan Carpenter rc = -EFAULT; 3913c4d7559SDave Watson break; 3923c4d7559SDave Watson } 393fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 394fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256 * 395fb99bce7SDave Watson crypto_info_aes_gcm_256 = 396fb99bce7SDave Watson container_of(crypto_info, 397fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256, 398fb99bce7SDave Watson info); 399fb99bce7SDave Watson 400fb99bce7SDave Watson if (len != sizeof(*crypto_info_aes_gcm_256)) { 401fb99bce7SDave Watson rc = -EINVAL; 402fb99bce7SDave Watson goto out; 403fb99bce7SDave Watson } 404fb99bce7SDave Watson lock_sock(sk); 405fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->iv, 406fb99bce7SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE, 407fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_IV_SIZE); 408fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->rec_seq, ctx->tx.rec_seq, 409fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE); 410fb99bce7SDave Watson release_sock(sk); 411fb99bce7SDave Watson if (copy_to_user(optval, 412fb99bce7SDave Watson crypto_info_aes_gcm_256, 413fb99bce7SDave Watson sizeof(*crypto_info_aes_gcm_256))) 414fb99bce7SDave Watson rc = -EFAULT; 415fb99bce7SDave Watson break; 416fb99bce7SDave Watson } 4173c4d7559SDave Watson default: 4183c4d7559SDave Watson rc = -EINVAL; 4193c4d7559SDave Watson } 4203c4d7559SDave Watson 4213c4d7559SDave Watson out: 4223c4d7559SDave Watson return rc; 4233c4d7559SDave Watson } 4243c4d7559SDave Watson 4253c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 4263c4d7559SDave Watson char __user *optval, int __user *optlen) 4273c4d7559SDave Watson { 4283c4d7559SDave Watson int rc = 0; 4293c4d7559SDave Watson 4303c4d7559SDave Watson switch (optname) { 4313c4d7559SDave Watson case TLS_TX: 4323c4d7559SDave Watson rc = do_tls_getsockopt_tx(sk, optval, optlen); 4333c4d7559SDave Watson break; 4343c4d7559SDave Watson default: 4353c4d7559SDave Watson rc = -ENOPROTOOPT; 4363c4d7559SDave Watson break; 4373c4d7559SDave Watson } 4383c4d7559SDave Watson return rc; 4393c4d7559SDave Watson } 4403c4d7559SDave Watson 4413c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 4423c4d7559SDave Watson char __user *optval, int __user *optlen) 4433c4d7559SDave Watson { 4443c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4453c4d7559SDave Watson 4463c4d7559SDave Watson if (level != SOL_TLS) 447be7bbea1SJakub Kicinski return ctx->sk_proto->getsockopt(sk, level, 448be7bbea1SJakub Kicinski optname, optval, optlen); 4493c4d7559SDave Watson 4503c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 4513c4d7559SDave Watson } 4523c4d7559SDave Watson 453a7b75c5aSChristoph Hellwig static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval, 454c46234ebSDave Watson unsigned int optlen, int tx) 4553c4d7559SDave Watson { 456196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 4574509de14SVakul Garg struct tls_crypto_info *alt_crypto_info; 4583c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 459fb99bce7SDave Watson size_t optsize; 4603c4d7559SDave Watson int rc = 0; 46158371585SDave Watson int conf; 4623c4d7559SDave Watson 463a7b75c5aSChristoph Hellwig if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info))) { 4643c4d7559SDave Watson rc = -EINVAL; 4653c4d7559SDave Watson goto out; 4663c4d7559SDave Watson } 4673c4d7559SDave Watson 4684509de14SVakul Garg if (tx) { 46986029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 4704509de14SVakul Garg alt_crypto_info = &ctx->crypto_recv.info; 4714509de14SVakul Garg } else { 47286029d10SSabrina Dubroca crypto_info = &ctx->crypto_recv.info; 4734509de14SVakul Garg alt_crypto_info = &ctx->crypto_send.info; 4744509de14SVakul Garg } 475c46234ebSDave Watson 476196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 477877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 478877d17c7SSabrina Dubroca rc = -EBUSY; 479196c31b4SIlya Lesokhin goto out; 480877d17c7SSabrina Dubroca } 481196c31b4SIlya Lesokhin 482a7b75c5aSChristoph Hellwig rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info)); 4833c4d7559SDave Watson if (rc) { 4843c4d7559SDave Watson rc = -EFAULT; 485257082e6SBoris Pismenny goto err_crypto_info; 4863c4d7559SDave Watson } 4873c4d7559SDave Watson 4883c4d7559SDave Watson /* check version */ 489130b392cSDave Watson if (crypto_info->version != TLS_1_2_VERSION && 490130b392cSDave Watson crypto_info->version != TLS_1_3_VERSION) { 4914a5cdc60SValentin Vidic rc = -EINVAL; 492196c31b4SIlya Lesokhin goto err_crypto_info; 4933c4d7559SDave Watson } 4943c4d7559SDave Watson 4954509de14SVakul Garg /* Ensure that TLS version and ciphers are same in both directions */ 4964509de14SVakul Garg if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { 4974509de14SVakul Garg if (alt_crypto_info->version != crypto_info->version || 4984509de14SVakul Garg alt_crypto_info->cipher_type != crypto_info->cipher_type) { 4994509de14SVakul Garg rc = -EINVAL; 5004509de14SVakul Garg goto err_crypto_info; 5014509de14SVakul Garg } 5024509de14SVakul Garg } 5034509de14SVakul Garg 504196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 505fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_128: 506f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_gcm_128); 507f295b3aeSVakul Garg break; 508fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 509f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_gcm_256); 510f295b3aeSVakul Garg break; 511f295b3aeSVakul Garg } 512f295b3aeSVakul Garg case TLS_CIPHER_AES_CCM_128: 513f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_ccm_128); 514f295b3aeSVakul Garg break; 515f295b3aeSVakul Garg default: 516f295b3aeSVakul Garg rc = -EINVAL; 517f295b3aeSVakul Garg goto err_crypto_info; 518f295b3aeSVakul Garg } 519f295b3aeSVakul Garg 520fb99bce7SDave Watson if (optlen != optsize) { 5213c4d7559SDave Watson rc = -EINVAL; 5226db959c8SSabrina Dubroca goto err_crypto_info; 5233c4d7559SDave Watson } 524f295b3aeSVakul Garg 525d3c48151SChristoph Hellwig rc = copy_from_sockptr_offset(crypto_info + 1, optval, 526d3c48151SChristoph Hellwig sizeof(*crypto_info), 527196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 5283c4d7559SDave Watson if (rc) { 5293c4d7559SDave Watson rc = -EFAULT; 5303c4d7559SDave Watson goto err_crypto_info; 5313c4d7559SDave Watson } 5323c4d7559SDave Watson 533c46234ebSDave Watson if (tx) { 534e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 535e8f69799SIlya Lesokhin conf = TLS_HW; 536b32fd3ccSJakub Kicinski if (!rc) { 537b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE); 538b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); 539b32fd3ccSJakub Kicinski } else { 540c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 541318892acSJakub Kicinski if (rc) 542318892acSJakub Kicinski goto err_crypto_info; 543b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW); 544b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); 545f66de3eeSBoris Pismenny conf = TLS_SW; 546e8f69799SIlya Lesokhin } 547c46234ebSDave Watson } else { 5484799ac81SBoris Pismenny rc = tls_set_device_offload_rx(sk, ctx); 5494799ac81SBoris Pismenny conf = TLS_HW; 550b32fd3ccSJakub Kicinski if (!rc) { 551b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE); 552b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); 553b32fd3ccSJakub Kicinski } else { 554c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 555318892acSJakub Kicinski if (rc) 556318892acSJakub Kicinski goto err_crypto_info; 557b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW); 558b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); 559f66de3eeSBoris Pismenny conf = TLS_SW; 560c46234ebSDave Watson } 561313ab004SJohn Fastabend tls_sw_strparser_arm(sk, ctx); 5624799ac81SBoris Pismenny } 563c46234ebSDave Watson 564f66de3eeSBoris Pismenny if (tx) 565f66de3eeSBoris Pismenny ctx->tx_conf = conf; 566f66de3eeSBoris Pismenny else 567f66de3eeSBoris Pismenny ctx->rx_conf = conf; 5686d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 569c46234ebSDave Watson if (tx) { 570ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 571ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 572c46234ebSDave Watson } else { 573c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 574c46234ebSDave Watson } 5753c4d7559SDave Watson goto out; 5763c4d7559SDave Watson 5773c4d7559SDave Watson err_crypto_info: 578c844eb46SSabrina Dubroca memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); 5793c4d7559SDave Watson out: 5803c4d7559SDave Watson return rc; 5813c4d7559SDave Watson } 5823c4d7559SDave Watson 583a7b75c5aSChristoph Hellwig static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval, 584a7b75c5aSChristoph Hellwig unsigned int optlen) 5853c4d7559SDave Watson { 5863c4d7559SDave Watson int rc = 0; 5873c4d7559SDave Watson 5883c4d7559SDave Watson switch (optname) { 5893c4d7559SDave Watson case TLS_TX: 590c46234ebSDave Watson case TLS_RX: 5913c4d7559SDave Watson lock_sock(sk); 592c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 593c46234ebSDave Watson optname == TLS_TX); 5943c4d7559SDave Watson release_sock(sk); 5953c4d7559SDave Watson break; 5963c4d7559SDave Watson default: 5973c4d7559SDave Watson rc = -ENOPROTOOPT; 5983c4d7559SDave Watson break; 5993c4d7559SDave Watson } 6003c4d7559SDave Watson return rc; 6013c4d7559SDave Watson } 6023c4d7559SDave Watson 6033c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 604a7b75c5aSChristoph Hellwig sockptr_t optval, unsigned int optlen) 6053c4d7559SDave Watson { 6063c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 6073c4d7559SDave Watson 6083c4d7559SDave Watson if (level != SOL_TLS) 609be7bbea1SJakub Kicinski return ctx->sk_proto->setsockopt(sk, level, optname, optval, 610be7bbea1SJakub Kicinski optlen); 6113c4d7559SDave Watson 6123c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 6133c4d7559SDave Watson } 6143c4d7559SDave Watson 61508700dabSJakub Kicinski struct tls_context *tls_ctx_create(struct sock *sk) 616dd0bed16SAtul Gupta { 617dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 618dd0bed16SAtul Gupta struct tls_context *ctx; 619dd0bed16SAtul Gupta 620c6ec179aSGanesh Goudar ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); 621dd0bed16SAtul Gupta if (!ctx) 622dd0bed16SAtul Gupta return NULL; 623dd0bed16SAtul Gupta 62479ffe608SJakub Kicinski mutex_init(&ctx->tx_lock); 62515a7dea7SJakub Kicinski rcu_assign_pointer(icsk->icsk_ulp_data, ctx); 626d5bee737SJakub Sitnicki ctx->sk_proto = READ_ONCE(sk->sk_prot); 627dd0bed16SAtul Gupta return ctx; 628dd0bed16SAtul Gupta } 629dd0bed16SAtul Gupta 63063a6b3feSAtul Gupta static void tls_build_proto(struct sock *sk) 63163a6b3feSAtul Gupta { 63263a6b3feSAtul Gupta int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 6339a893949SWill Deacon struct proto *prot = READ_ONCE(sk->sk_prot); 63463a6b3feSAtul Gupta 63563a6b3feSAtul Gupta /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 63663a6b3feSAtul Gupta if (ip_ver == TLSV6 && 6375bb4c45dSJakub Sitnicki unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) { 63863a6b3feSAtul Gupta mutex_lock(&tcpv6_prot_mutex); 6395bb4c45dSJakub Sitnicki if (likely(prot != saved_tcpv6_prot)) { 6405bb4c45dSJakub Sitnicki build_protos(tls_prots[TLSV6], prot); 6415bb4c45dSJakub Sitnicki smp_store_release(&saved_tcpv6_prot, prot); 64263a6b3feSAtul Gupta } 64363a6b3feSAtul Gupta mutex_unlock(&tcpv6_prot_mutex); 64463a6b3feSAtul Gupta } 64563a6b3feSAtul Gupta 64663a6b3feSAtul Gupta if (ip_ver == TLSV4 && 6475bb4c45dSJakub Sitnicki unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) { 64863a6b3feSAtul Gupta mutex_lock(&tcpv4_prot_mutex); 6495bb4c45dSJakub Sitnicki if (likely(prot != saved_tcpv4_prot)) { 6505bb4c45dSJakub Sitnicki build_protos(tls_prots[TLSV4], prot); 6515bb4c45dSJakub Sitnicki smp_store_release(&saved_tcpv4_prot, prot); 65263a6b3feSAtul Gupta } 65363a6b3feSAtul Gupta mutex_unlock(&tcpv4_prot_mutex); 65463a6b3feSAtul Gupta } 65563a6b3feSAtul Gupta } 65663a6b3feSAtul Gupta 657f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 658f13fe3e6SJakub Sitnicki const struct proto *base) 659c113187dSBoris Pismenny { 660f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 661f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 662f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 663f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 664c113187dSBoris Pismenny 665f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 666f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 667f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 668c46234ebSDave Watson 669f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 670f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 671924ad65eSJohn Fastabend prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read; 672f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 673c46234ebSDave Watson 674f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 675f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 676924ad65eSJohn Fastabend prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read; 677f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 678dd0bed16SAtul Gupta 679e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 680e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 681e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 682e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 683e8f69799SIlya Lesokhin 684e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 685e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 686e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 6874799ac81SBoris Pismenny 6884799ac81SBoris Pismenny prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; 6894799ac81SBoris Pismenny 6904799ac81SBoris Pismenny prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; 6914799ac81SBoris Pismenny 6924799ac81SBoris Pismenny prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; 693e8f69799SIlya Lesokhin #endif 69453b4414aSJakub Kicinski #ifdef CONFIG_TLS_TOE 695f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 6960eb8745eSJakub Kicinski prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_toe_hash; 6970eb8745eSJakub Kicinski prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_toe_unhash; 69853b4414aSJakub Kicinski #endif 699c113187dSBoris Pismenny } 700c113187dSBoris Pismenny 7013c4d7559SDave Watson static int tls_init(struct sock *sk) 7023c4d7559SDave Watson { 7033c4d7559SDave Watson struct tls_context *ctx; 7043c4d7559SDave Watson int rc = 0; 7053c4d7559SDave Watson 70616bed0e6SJakub Kicinski tls_build_proto(sk); 70716bed0e6SJakub Kicinski 70853b4414aSJakub Kicinski #ifdef CONFIG_TLS_TOE 7090eb8745eSJakub Kicinski if (tls_toe_bypass(sk)) 71095fa1454SJohn Fastabend return 0; 71153b4414aSJakub Kicinski #endif 712dd0bed16SAtul Gupta 713d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 714d91c3e17SIlya Lesokhin * in ESTABLISHED state. 715d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 716d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 717d91c3e17SIlya Lesokhin * share the ulp context. 718d91c3e17SIlya Lesokhin */ 719d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 7204a5cdc60SValentin Vidic return -ENOTCONN; 721d91c3e17SIlya Lesokhin 7223c4d7559SDave Watson /* allocate tls context */ 72395fa1454SJohn Fastabend write_lock_bh(&sk->sk_callback_lock); 72408700dabSJakub Kicinski ctx = tls_ctx_create(sk); 7253c4d7559SDave Watson if (!ctx) { 7263c4d7559SDave Watson rc = -ENOMEM; 7273c4d7559SDave Watson goto out; 7283c4d7559SDave Watson } 7296d88207fSIlya Lesokhin 730f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 731f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 7326d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 7333c4d7559SDave Watson out: 73495fa1454SJohn Fastabend write_unlock_bh(&sk->sk_callback_lock); 7353c4d7559SDave Watson return rc; 7363c4d7559SDave Watson } 7373c4d7559SDave Watson 73833bfe20dSJohn Fastabend static void tls_update(struct sock *sk, struct proto *p, 73933bfe20dSJohn Fastabend void (*write_space)(struct sock *sk)) 74095fa1454SJohn Fastabend { 74195fa1454SJohn Fastabend struct tls_context *ctx; 74295fa1454SJohn Fastabend 74395fa1454SJohn Fastabend ctx = tls_get_ctx(sk); 74433bfe20dSJohn Fastabend if (likely(ctx)) { 74533bfe20dSJohn Fastabend ctx->sk_write_space = write_space; 74695fa1454SJohn Fastabend ctx->sk_proto = p; 74733bfe20dSJohn Fastabend } else { 748b8e202d1SJakub Sitnicki /* Pairs with lockless read in sk_clone_lock(). */ 749b8e202d1SJakub Sitnicki WRITE_ONCE(sk->sk_prot, p); 75033bfe20dSJohn Fastabend sk->sk_write_space = write_space; 75133bfe20dSJohn Fastabend } 75295fa1454SJohn Fastabend } 75395fa1454SJohn Fastabend 75426811cc9SDavide Caratti static int tls_get_info(const struct sock *sk, struct sk_buff *skb) 75526811cc9SDavide Caratti { 75626811cc9SDavide Caratti u16 version, cipher_type; 75726811cc9SDavide Caratti struct tls_context *ctx; 75826811cc9SDavide Caratti struct nlattr *start; 75926811cc9SDavide Caratti int err; 76026811cc9SDavide Caratti 76126811cc9SDavide Caratti start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS); 76226811cc9SDavide Caratti if (!start) 76326811cc9SDavide Caratti return -EMSGSIZE; 76426811cc9SDavide Caratti 76526811cc9SDavide Caratti rcu_read_lock(); 76626811cc9SDavide Caratti ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data); 76726811cc9SDavide Caratti if (!ctx) { 76826811cc9SDavide Caratti err = 0; 76926811cc9SDavide Caratti goto nla_failure; 77026811cc9SDavide Caratti } 77126811cc9SDavide Caratti version = ctx->prot_info.version; 77226811cc9SDavide Caratti if (version) { 77326811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_VERSION, version); 77426811cc9SDavide Caratti if (err) 77526811cc9SDavide Caratti goto nla_failure; 77626811cc9SDavide Caratti } 77726811cc9SDavide Caratti cipher_type = ctx->prot_info.cipher_type; 77826811cc9SDavide Caratti if (cipher_type) { 77926811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type); 78026811cc9SDavide Caratti if (err) 78126811cc9SDavide Caratti goto nla_failure; 78226811cc9SDavide Caratti } 78326811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true)); 78426811cc9SDavide Caratti if (err) 78526811cc9SDavide Caratti goto nla_failure; 78626811cc9SDavide Caratti 78726811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false)); 78826811cc9SDavide Caratti if (err) 78926811cc9SDavide Caratti goto nla_failure; 79026811cc9SDavide Caratti 79126811cc9SDavide Caratti rcu_read_unlock(); 79226811cc9SDavide Caratti nla_nest_end(skb, start); 79326811cc9SDavide Caratti return 0; 79426811cc9SDavide Caratti 79526811cc9SDavide Caratti nla_failure: 79626811cc9SDavide Caratti rcu_read_unlock(); 79726811cc9SDavide Caratti nla_nest_cancel(skb, start); 79826811cc9SDavide Caratti return err; 79926811cc9SDavide Caratti } 80026811cc9SDavide Caratti 80126811cc9SDavide Caratti static size_t tls_get_info_size(const struct sock *sk) 80226811cc9SDavide Caratti { 80326811cc9SDavide Caratti size_t size = 0; 80426811cc9SDavide Caratti 80526811cc9SDavide Caratti size += nla_total_size(0) + /* INET_ULP_INFO_TLS */ 80626811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */ 80726811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */ 80826811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */ 80926811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */ 81026811cc9SDavide Caratti 0; 81126811cc9SDavide Caratti 81226811cc9SDavide Caratti return size; 81326811cc9SDavide Caratti } 81426811cc9SDavide Caratti 815d26b698dSJakub Kicinski static int __net_init tls_init_net(struct net *net) 816d26b698dSJakub Kicinski { 817d26b698dSJakub Kicinski int err; 818d26b698dSJakub Kicinski 819d26b698dSJakub Kicinski net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib); 820d26b698dSJakub Kicinski if (!net->mib.tls_statistics) 821d26b698dSJakub Kicinski return -ENOMEM; 822d26b698dSJakub Kicinski 823d26b698dSJakub Kicinski err = tls_proc_init(net); 824d26b698dSJakub Kicinski if (err) 825d26b698dSJakub Kicinski goto err_free_stats; 826d26b698dSJakub Kicinski 827d26b698dSJakub Kicinski return 0; 828d26b698dSJakub Kicinski err_free_stats: 829d26b698dSJakub Kicinski free_percpu(net->mib.tls_statistics); 830d26b698dSJakub Kicinski return err; 831d26b698dSJakub Kicinski } 832d26b698dSJakub Kicinski 833d26b698dSJakub Kicinski static void __net_exit tls_exit_net(struct net *net) 834d26b698dSJakub Kicinski { 835d26b698dSJakub Kicinski tls_proc_fini(net); 836d26b698dSJakub Kicinski free_percpu(net->mib.tls_statistics); 837d26b698dSJakub Kicinski } 838d26b698dSJakub Kicinski 839d26b698dSJakub Kicinski static struct pernet_operations tls_proc_ops = { 840d26b698dSJakub Kicinski .init = tls_init_net, 841d26b698dSJakub Kicinski .exit = tls_exit_net, 842d26b698dSJakub Kicinski }; 843d26b698dSJakub Kicinski 8443c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 8453c4d7559SDave Watson .name = "tls", 8463c4d7559SDave Watson .owner = THIS_MODULE, 8473c4d7559SDave Watson .init = tls_init, 84895fa1454SJohn Fastabend .update = tls_update, 84926811cc9SDavide Caratti .get_info = tls_get_info, 85026811cc9SDavide Caratti .get_info_size = tls_get_info_size, 8513c4d7559SDave Watson }; 8523c4d7559SDave Watson 8533c4d7559SDave Watson static int __init tls_register(void) 8543c4d7559SDave Watson { 855d26b698dSJakub Kicinski int err; 856d26b698dSJakub Kicinski 857d26b698dSJakub Kicinski err = register_pernet_subsys(&tls_proc_ops); 858d26b698dSJakub Kicinski if (err) 859d26b698dSJakub Kicinski return err; 860d26b698dSJakub Kicinski 861c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 862c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 863d4ffb02dSWillem de Bruijn tls_sw_proto_ops.sendpage_locked = tls_sw_sendpage_locked, 864c46234ebSDave Watson 865e8f69799SIlya Lesokhin tls_device_init(); 8663c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 8673c4d7559SDave Watson 8683c4d7559SDave Watson return 0; 8693c4d7559SDave Watson } 8703c4d7559SDave Watson 8713c4d7559SDave Watson static void __exit tls_unregister(void) 8723c4d7559SDave Watson { 8733c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 874e8f69799SIlya Lesokhin tls_device_cleanup(); 875d26b698dSJakub Kicinski unregister_pernet_subsys(&tls_proc_ops); 8763c4d7559SDave Watson } 8773c4d7559SDave Watson 8783c4d7559SDave Watson module_init(tls_register); 8793c4d7559SDave Watson module_exit(tls_unregister); 880