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 333ffa81fa4SYutaro Hayakawa static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, 334ffa81fa4SYutaro Hayakawa int __user *optlen, int tx) 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; 339ffa81fa4SYutaro Hayakawa struct cipher_context *cctx; 3403c4d7559SDave Watson int len; 3413c4d7559SDave Watson 3423c4d7559SDave Watson if (get_user(len, optlen)) 3433c4d7559SDave Watson return -EFAULT; 3443c4d7559SDave Watson 3453c4d7559SDave Watson if (!optval || (len < sizeof(*crypto_info))) { 3463c4d7559SDave Watson rc = -EINVAL; 3473c4d7559SDave Watson goto out; 3483c4d7559SDave Watson } 3493c4d7559SDave Watson 3503c4d7559SDave Watson if (!ctx) { 3513c4d7559SDave Watson rc = -EBUSY; 3523c4d7559SDave Watson goto out; 3533c4d7559SDave Watson } 3543c4d7559SDave Watson 3553c4d7559SDave Watson /* get user crypto info */ 356ffa81fa4SYutaro Hayakawa if (tx) { 35786029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 358ffa81fa4SYutaro Hayakawa cctx = &ctx->tx; 359ffa81fa4SYutaro Hayakawa } else { 360ffa81fa4SYutaro Hayakawa crypto_info = &ctx->crypto_recv.info; 361ffa81fa4SYutaro Hayakawa cctx = &ctx->rx; 362ffa81fa4SYutaro Hayakawa } 3633c4d7559SDave Watson 3643c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3653c4d7559SDave Watson rc = -EBUSY; 3663c4d7559SDave Watson goto out; 3673c4d7559SDave Watson } 3683c4d7559SDave Watson 3695a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 370ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 371ac55cd61SDan Carpenter rc = -EFAULT; 3723c4d7559SDave Watson goto out; 3733c4d7559SDave Watson } 3743c4d7559SDave Watson 3753c4d7559SDave Watson switch (crypto_info->cipher_type) { 3763c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3773c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3783c4d7559SDave Watson crypto_info_aes_gcm_128 = 3793c4d7559SDave Watson container_of(crypto_info, 3803c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3813c4d7559SDave Watson info); 3823c4d7559SDave Watson 3833c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3843c4d7559SDave Watson rc = -EINVAL; 3853c4d7559SDave Watson goto out; 3863c4d7559SDave Watson } 3873c4d7559SDave Watson lock_sock(sk); 388a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 389ffa81fa4SYutaro Hayakawa cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3903c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 391ffa81fa4SYutaro Hayakawa memcpy(crypto_info_aes_gcm_128->rec_seq, cctx->rec_seq, 392c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3933c4d7559SDave Watson release_sock(sk); 394ac55cd61SDan Carpenter if (copy_to_user(optval, 3953c4d7559SDave Watson crypto_info_aes_gcm_128, 396ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 397ac55cd61SDan Carpenter rc = -EFAULT; 3983c4d7559SDave Watson break; 3993c4d7559SDave Watson } 400fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 401fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256 * 402fb99bce7SDave Watson crypto_info_aes_gcm_256 = 403fb99bce7SDave Watson container_of(crypto_info, 404fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256, 405fb99bce7SDave Watson info); 406fb99bce7SDave Watson 407fb99bce7SDave Watson if (len != sizeof(*crypto_info_aes_gcm_256)) { 408fb99bce7SDave Watson rc = -EINVAL; 409fb99bce7SDave Watson goto out; 410fb99bce7SDave Watson } 411fb99bce7SDave Watson lock_sock(sk); 412fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->iv, 413ffa81fa4SYutaro Hayakawa cctx->iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE, 414fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_IV_SIZE); 415ffa81fa4SYutaro Hayakawa memcpy(crypto_info_aes_gcm_256->rec_seq, cctx->rec_seq, 416fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE); 417fb99bce7SDave Watson release_sock(sk); 418fb99bce7SDave Watson if (copy_to_user(optval, 419fb99bce7SDave Watson crypto_info_aes_gcm_256, 420fb99bce7SDave Watson sizeof(*crypto_info_aes_gcm_256))) 421fb99bce7SDave Watson rc = -EFAULT; 422fb99bce7SDave Watson break; 423fb99bce7SDave Watson } 4243c4d7559SDave Watson default: 4253c4d7559SDave Watson rc = -EINVAL; 4263c4d7559SDave Watson } 4273c4d7559SDave Watson 4283c4d7559SDave Watson out: 4293c4d7559SDave Watson return rc; 4303c4d7559SDave Watson } 4313c4d7559SDave Watson 4323c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 4333c4d7559SDave Watson char __user *optval, int __user *optlen) 4343c4d7559SDave Watson { 4353c4d7559SDave Watson int rc = 0; 4363c4d7559SDave Watson 4373c4d7559SDave Watson switch (optname) { 4383c4d7559SDave Watson case TLS_TX: 439ffa81fa4SYutaro Hayakawa case TLS_RX: 440ffa81fa4SYutaro Hayakawa rc = do_tls_getsockopt_conf(sk, optval, optlen, 441ffa81fa4SYutaro Hayakawa optname == TLS_TX); 4423c4d7559SDave Watson break; 4433c4d7559SDave Watson default: 4443c4d7559SDave Watson rc = -ENOPROTOOPT; 4453c4d7559SDave Watson break; 4463c4d7559SDave Watson } 4473c4d7559SDave Watson return rc; 4483c4d7559SDave Watson } 4493c4d7559SDave Watson 4503c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 4513c4d7559SDave Watson char __user *optval, int __user *optlen) 4523c4d7559SDave Watson { 4533c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4543c4d7559SDave Watson 4553c4d7559SDave Watson if (level != SOL_TLS) 456be7bbea1SJakub Kicinski return ctx->sk_proto->getsockopt(sk, level, 457be7bbea1SJakub Kicinski optname, optval, optlen); 4583c4d7559SDave Watson 4593c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 4603c4d7559SDave Watson } 4613c4d7559SDave Watson 462a7b75c5aSChristoph Hellwig static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval, 463c46234ebSDave Watson unsigned int optlen, int tx) 4643c4d7559SDave Watson { 465196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 4664509de14SVakul Garg struct tls_crypto_info *alt_crypto_info; 4673c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 468fb99bce7SDave Watson size_t optsize; 4693c4d7559SDave Watson int rc = 0; 47058371585SDave Watson int conf; 4713c4d7559SDave Watson 472a7b75c5aSChristoph Hellwig if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info))) { 4733c4d7559SDave Watson rc = -EINVAL; 4743c4d7559SDave Watson goto out; 4753c4d7559SDave Watson } 4763c4d7559SDave Watson 4774509de14SVakul Garg if (tx) { 47886029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 4794509de14SVakul Garg alt_crypto_info = &ctx->crypto_recv.info; 4804509de14SVakul Garg } else { 48186029d10SSabrina Dubroca crypto_info = &ctx->crypto_recv.info; 4824509de14SVakul Garg alt_crypto_info = &ctx->crypto_send.info; 4834509de14SVakul Garg } 484c46234ebSDave Watson 485196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 486877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 487877d17c7SSabrina Dubroca rc = -EBUSY; 488196c31b4SIlya Lesokhin goto out; 489877d17c7SSabrina Dubroca } 490196c31b4SIlya Lesokhin 491a7b75c5aSChristoph Hellwig rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info)); 4923c4d7559SDave Watson if (rc) { 4933c4d7559SDave Watson rc = -EFAULT; 494257082e6SBoris Pismenny goto err_crypto_info; 4953c4d7559SDave Watson } 4963c4d7559SDave Watson 4973c4d7559SDave Watson /* check version */ 498130b392cSDave Watson if (crypto_info->version != TLS_1_2_VERSION && 499130b392cSDave Watson crypto_info->version != TLS_1_3_VERSION) { 5004a5cdc60SValentin Vidic rc = -EINVAL; 501196c31b4SIlya Lesokhin goto err_crypto_info; 5023c4d7559SDave Watson } 5033c4d7559SDave Watson 5044509de14SVakul Garg /* Ensure that TLS version and ciphers are same in both directions */ 5054509de14SVakul Garg if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { 5064509de14SVakul Garg if (alt_crypto_info->version != crypto_info->version || 5074509de14SVakul Garg alt_crypto_info->cipher_type != crypto_info->cipher_type) { 5084509de14SVakul Garg rc = -EINVAL; 5094509de14SVakul Garg goto err_crypto_info; 5104509de14SVakul Garg } 5114509de14SVakul Garg } 5124509de14SVakul Garg 513196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 514fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_128: 515f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_gcm_128); 516f295b3aeSVakul Garg break; 517fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 518f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_gcm_256); 519f295b3aeSVakul Garg break; 520f295b3aeSVakul Garg } 521f295b3aeSVakul Garg case TLS_CIPHER_AES_CCM_128: 522f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_ccm_128); 523f295b3aeSVakul Garg break; 524f295b3aeSVakul Garg default: 525f295b3aeSVakul Garg rc = -EINVAL; 526f295b3aeSVakul Garg goto err_crypto_info; 527f295b3aeSVakul Garg } 528f295b3aeSVakul Garg 529fb99bce7SDave Watson if (optlen != optsize) { 5303c4d7559SDave Watson rc = -EINVAL; 5316db959c8SSabrina Dubroca goto err_crypto_info; 5323c4d7559SDave Watson } 533f295b3aeSVakul Garg 534d3c48151SChristoph Hellwig rc = copy_from_sockptr_offset(crypto_info + 1, optval, 535d3c48151SChristoph Hellwig sizeof(*crypto_info), 536196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 5373c4d7559SDave Watson if (rc) { 5383c4d7559SDave Watson rc = -EFAULT; 5393c4d7559SDave Watson goto err_crypto_info; 5403c4d7559SDave Watson } 5413c4d7559SDave Watson 542c46234ebSDave Watson if (tx) { 543e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 544e8f69799SIlya Lesokhin conf = TLS_HW; 545b32fd3ccSJakub Kicinski if (!rc) { 546b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE); 547b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); 548b32fd3ccSJakub Kicinski } else { 549c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 550318892acSJakub Kicinski if (rc) 551318892acSJakub Kicinski goto err_crypto_info; 552b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW); 553b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); 554f66de3eeSBoris Pismenny conf = TLS_SW; 555e8f69799SIlya Lesokhin } 556c46234ebSDave Watson } else { 5574799ac81SBoris Pismenny rc = tls_set_device_offload_rx(sk, ctx); 5584799ac81SBoris Pismenny conf = TLS_HW; 559b32fd3ccSJakub Kicinski if (!rc) { 560b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE); 561b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); 562b32fd3ccSJakub Kicinski } else { 563c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 564318892acSJakub Kicinski if (rc) 565318892acSJakub Kicinski goto err_crypto_info; 566b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW); 567b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); 568f66de3eeSBoris Pismenny conf = TLS_SW; 569c46234ebSDave Watson } 570313ab004SJohn Fastabend tls_sw_strparser_arm(sk, ctx); 5714799ac81SBoris Pismenny } 572c46234ebSDave Watson 573f66de3eeSBoris Pismenny if (tx) 574f66de3eeSBoris Pismenny ctx->tx_conf = conf; 575f66de3eeSBoris Pismenny else 576f66de3eeSBoris Pismenny ctx->rx_conf = conf; 5776d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 578c46234ebSDave Watson if (tx) { 579ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 580ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 581c46234ebSDave Watson } else { 582c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 583c46234ebSDave Watson } 5843c4d7559SDave Watson goto out; 5853c4d7559SDave Watson 5863c4d7559SDave Watson err_crypto_info: 587c844eb46SSabrina Dubroca memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); 5883c4d7559SDave Watson out: 5893c4d7559SDave Watson return rc; 5903c4d7559SDave Watson } 5913c4d7559SDave Watson 592a7b75c5aSChristoph Hellwig static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval, 593a7b75c5aSChristoph Hellwig unsigned int optlen) 5943c4d7559SDave Watson { 5953c4d7559SDave Watson int rc = 0; 5963c4d7559SDave Watson 5973c4d7559SDave Watson switch (optname) { 5983c4d7559SDave Watson case TLS_TX: 599c46234ebSDave Watson case TLS_RX: 6003c4d7559SDave Watson lock_sock(sk); 601c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 602c46234ebSDave Watson optname == TLS_TX); 6033c4d7559SDave Watson release_sock(sk); 6043c4d7559SDave Watson break; 6053c4d7559SDave Watson default: 6063c4d7559SDave Watson rc = -ENOPROTOOPT; 6073c4d7559SDave Watson break; 6083c4d7559SDave Watson } 6093c4d7559SDave Watson return rc; 6103c4d7559SDave Watson } 6113c4d7559SDave Watson 6123c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 613a7b75c5aSChristoph Hellwig sockptr_t optval, unsigned int optlen) 6143c4d7559SDave Watson { 6153c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 6163c4d7559SDave Watson 6173c4d7559SDave Watson if (level != SOL_TLS) 618be7bbea1SJakub Kicinski return ctx->sk_proto->setsockopt(sk, level, optname, optval, 619be7bbea1SJakub Kicinski optlen); 6203c4d7559SDave Watson 6213c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 6223c4d7559SDave Watson } 6233c4d7559SDave Watson 62408700dabSJakub Kicinski struct tls_context *tls_ctx_create(struct sock *sk) 625dd0bed16SAtul Gupta { 626dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 627dd0bed16SAtul Gupta struct tls_context *ctx; 628dd0bed16SAtul Gupta 629c6ec179aSGanesh Goudar ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); 630dd0bed16SAtul Gupta if (!ctx) 631dd0bed16SAtul Gupta return NULL; 632dd0bed16SAtul Gupta 63379ffe608SJakub Kicinski mutex_init(&ctx->tx_lock); 63415a7dea7SJakub Kicinski rcu_assign_pointer(icsk->icsk_ulp_data, ctx); 635d5bee737SJakub Sitnicki ctx->sk_proto = READ_ONCE(sk->sk_prot); 636dd0bed16SAtul Gupta return ctx; 637dd0bed16SAtul Gupta } 638dd0bed16SAtul Gupta 63963a6b3feSAtul Gupta static void tls_build_proto(struct sock *sk) 64063a6b3feSAtul Gupta { 64163a6b3feSAtul Gupta int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 6429a893949SWill Deacon struct proto *prot = READ_ONCE(sk->sk_prot); 64363a6b3feSAtul Gupta 64463a6b3feSAtul Gupta /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 64563a6b3feSAtul Gupta if (ip_ver == TLSV6 && 6465bb4c45dSJakub Sitnicki unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) { 64763a6b3feSAtul Gupta mutex_lock(&tcpv6_prot_mutex); 6485bb4c45dSJakub Sitnicki if (likely(prot != saved_tcpv6_prot)) { 6495bb4c45dSJakub Sitnicki build_protos(tls_prots[TLSV6], prot); 6505bb4c45dSJakub Sitnicki smp_store_release(&saved_tcpv6_prot, prot); 65163a6b3feSAtul Gupta } 65263a6b3feSAtul Gupta mutex_unlock(&tcpv6_prot_mutex); 65363a6b3feSAtul Gupta } 65463a6b3feSAtul Gupta 65563a6b3feSAtul Gupta if (ip_ver == TLSV4 && 6565bb4c45dSJakub Sitnicki unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) { 65763a6b3feSAtul Gupta mutex_lock(&tcpv4_prot_mutex); 6585bb4c45dSJakub Sitnicki if (likely(prot != saved_tcpv4_prot)) { 6595bb4c45dSJakub Sitnicki build_protos(tls_prots[TLSV4], prot); 6605bb4c45dSJakub Sitnicki smp_store_release(&saved_tcpv4_prot, prot); 66163a6b3feSAtul Gupta } 66263a6b3feSAtul Gupta mutex_unlock(&tcpv4_prot_mutex); 66363a6b3feSAtul Gupta } 66463a6b3feSAtul Gupta } 66563a6b3feSAtul Gupta 666f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 667f13fe3e6SJakub Sitnicki const struct proto *base) 668c113187dSBoris Pismenny { 669f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 670f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 671f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 672f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 673c113187dSBoris Pismenny 674f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 675f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 676f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 677c46234ebSDave Watson 678f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 679f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 680924ad65eSJohn Fastabend prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read; 681f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 682c46234ebSDave Watson 683f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 684f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 685924ad65eSJohn Fastabend prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read; 686f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 687dd0bed16SAtul Gupta 688e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 689e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 690e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 691e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 692e8f69799SIlya Lesokhin 693e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 694e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 695e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 6964799ac81SBoris Pismenny 6974799ac81SBoris Pismenny prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; 6984799ac81SBoris Pismenny 6994799ac81SBoris Pismenny prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; 7004799ac81SBoris Pismenny 7014799ac81SBoris Pismenny prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; 702e8f69799SIlya Lesokhin #endif 70353b4414aSJakub Kicinski #ifdef CONFIG_TLS_TOE 704f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 7050eb8745eSJakub Kicinski prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_toe_hash; 7060eb8745eSJakub Kicinski prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_toe_unhash; 70753b4414aSJakub Kicinski #endif 708c113187dSBoris Pismenny } 709c113187dSBoris Pismenny 7103c4d7559SDave Watson static int tls_init(struct sock *sk) 7113c4d7559SDave Watson { 7123c4d7559SDave Watson struct tls_context *ctx; 7133c4d7559SDave Watson int rc = 0; 7143c4d7559SDave Watson 71516bed0e6SJakub Kicinski tls_build_proto(sk); 71616bed0e6SJakub Kicinski 71753b4414aSJakub Kicinski #ifdef CONFIG_TLS_TOE 7180eb8745eSJakub Kicinski if (tls_toe_bypass(sk)) 71995fa1454SJohn Fastabend return 0; 72053b4414aSJakub Kicinski #endif 721dd0bed16SAtul Gupta 722d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 723d91c3e17SIlya Lesokhin * in ESTABLISHED state. 724d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 725d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 726d91c3e17SIlya Lesokhin * share the ulp context. 727d91c3e17SIlya Lesokhin */ 728d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 7294a5cdc60SValentin Vidic return -ENOTCONN; 730d91c3e17SIlya Lesokhin 7313c4d7559SDave Watson /* allocate tls context */ 73295fa1454SJohn Fastabend write_lock_bh(&sk->sk_callback_lock); 73308700dabSJakub Kicinski ctx = tls_ctx_create(sk); 7343c4d7559SDave Watson if (!ctx) { 7353c4d7559SDave Watson rc = -ENOMEM; 7363c4d7559SDave Watson goto out; 7373c4d7559SDave Watson } 7386d88207fSIlya Lesokhin 739f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 740f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 7416d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 7423c4d7559SDave Watson out: 74395fa1454SJohn Fastabend write_unlock_bh(&sk->sk_callback_lock); 7443c4d7559SDave Watson return rc; 7453c4d7559SDave Watson } 7463c4d7559SDave Watson 74733bfe20dSJohn Fastabend static void tls_update(struct sock *sk, struct proto *p, 74833bfe20dSJohn Fastabend void (*write_space)(struct sock *sk)) 74995fa1454SJohn Fastabend { 75095fa1454SJohn Fastabend struct tls_context *ctx; 75195fa1454SJohn Fastabend 75295fa1454SJohn Fastabend ctx = tls_get_ctx(sk); 75333bfe20dSJohn Fastabend if (likely(ctx)) { 75433bfe20dSJohn Fastabend ctx->sk_write_space = write_space; 75595fa1454SJohn Fastabend ctx->sk_proto = p; 75633bfe20dSJohn Fastabend } else { 757b8e202d1SJakub Sitnicki /* Pairs with lockless read in sk_clone_lock(). */ 758b8e202d1SJakub Sitnicki WRITE_ONCE(sk->sk_prot, p); 75933bfe20dSJohn Fastabend sk->sk_write_space = write_space; 76033bfe20dSJohn Fastabend } 76195fa1454SJohn Fastabend } 76295fa1454SJohn Fastabend 76326811cc9SDavide Caratti static int tls_get_info(const struct sock *sk, struct sk_buff *skb) 76426811cc9SDavide Caratti { 76526811cc9SDavide Caratti u16 version, cipher_type; 76626811cc9SDavide Caratti struct tls_context *ctx; 76726811cc9SDavide Caratti struct nlattr *start; 76826811cc9SDavide Caratti int err; 76926811cc9SDavide Caratti 77026811cc9SDavide Caratti start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS); 77126811cc9SDavide Caratti if (!start) 77226811cc9SDavide Caratti return -EMSGSIZE; 77326811cc9SDavide Caratti 77426811cc9SDavide Caratti rcu_read_lock(); 77526811cc9SDavide Caratti ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data); 77626811cc9SDavide Caratti if (!ctx) { 77726811cc9SDavide Caratti err = 0; 77826811cc9SDavide Caratti goto nla_failure; 77926811cc9SDavide Caratti } 78026811cc9SDavide Caratti version = ctx->prot_info.version; 78126811cc9SDavide Caratti if (version) { 78226811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_VERSION, version); 78326811cc9SDavide Caratti if (err) 78426811cc9SDavide Caratti goto nla_failure; 78526811cc9SDavide Caratti } 78626811cc9SDavide Caratti cipher_type = ctx->prot_info.cipher_type; 78726811cc9SDavide Caratti if (cipher_type) { 78826811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type); 78926811cc9SDavide Caratti if (err) 79026811cc9SDavide Caratti goto nla_failure; 79126811cc9SDavide Caratti } 79226811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true)); 79326811cc9SDavide Caratti if (err) 79426811cc9SDavide Caratti goto nla_failure; 79526811cc9SDavide Caratti 79626811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false)); 79726811cc9SDavide Caratti if (err) 79826811cc9SDavide Caratti goto nla_failure; 79926811cc9SDavide Caratti 80026811cc9SDavide Caratti rcu_read_unlock(); 80126811cc9SDavide Caratti nla_nest_end(skb, start); 80226811cc9SDavide Caratti return 0; 80326811cc9SDavide Caratti 80426811cc9SDavide Caratti nla_failure: 80526811cc9SDavide Caratti rcu_read_unlock(); 80626811cc9SDavide Caratti nla_nest_cancel(skb, start); 80726811cc9SDavide Caratti return err; 80826811cc9SDavide Caratti } 80926811cc9SDavide Caratti 81026811cc9SDavide Caratti static size_t tls_get_info_size(const struct sock *sk) 81126811cc9SDavide Caratti { 81226811cc9SDavide Caratti size_t size = 0; 81326811cc9SDavide Caratti 81426811cc9SDavide Caratti size += nla_total_size(0) + /* INET_ULP_INFO_TLS */ 81526811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */ 81626811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */ 81726811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */ 81826811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */ 81926811cc9SDavide Caratti 0; 82026811cc9SDavide Caratti 82126811cc9SDavide Caratti return size; 82226811cc9SDavide Caratti } 82326811cc9SDavide Caratti 824d26b698dSJakub Kicinski static int __net_init tls_init_net(struct net *net) 825d26b698dSJakub Kicinski { 826d26b698dSJakub Kicinski int err; 827d26b698dSJakub Kicinski 828d26b698dSJakub Kicinski net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib); 829d26b698dSJakub Kicinski if (!net->mib.tls_statistics) 830d26b698dSJakub Kicinski return -ENOMEM; 831d26b698dSJakub Kicinski 832d26b698dSJakub Kicinski err = tls_proc_init(net); 833d26b698dSJakub Kicinski if (err) 834d26b698dSJakub Kicinski goto err_free_stats; 835d26b698dSJakub Kicinski 836d26b698dSJakub Kicinski return 0; 837d26b698dSJakub Kicinski err_free_stats: 838d26b698dSJakub Kicinski free_percpu(net->mib.tls_statistics); 839d26b698dSJakub Kicinski return err; 840d26b698dSJakub Kicinski } 841d26b698dSJakub Kicinski 842d26b698dSJakub Kicinski static void __net_exit tls_exit_net(struct net *net) 843d26b698dSJakub Kicinski { 844d26b698dSJakub Kicinski tls_proc_fini(net); 845d26b698dSJakub Kicinski free_percpu(net->mib.tls_statistics); 846d26b698dSJakub Kicinski } 847d26b698dSJakub Kicinski 848d26b698dSJakub Kicinski static struct pernet_operations tls_proc_ops = { 849d26b698dSJakub Kicinski .init = tls_init_net, 850d26b698dSJakub Kicinski .exit = tls_exit_net, 851d26b698dSJakub Kicinski }; 852d26b698dSJakub Kicinski 8533c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 8543c4d7559SDave Watson .name = "tls", 8553c4d7559SDave Watson .owner = THIS_MODULE, 8563c4d7559SDave Watson .init = tls_init, 85795fa1454SJohn Fastabend .update = tls_update, 85826811cc9SDavide Caratti .get_info = tls_get_info, 85926811cc9SDavide Caratti .get_info_size = tls_get_info_size, 8603c4d7559SDave Watson }; 8613c4d7559SDave Watson 8623c4d7559SDave Watson static int __init tls_register(void) 8633c4d7559SDave Watson { 864d26b698dSJakub Kicinski int err; 865d26b698dSJakub Kicinski 866d26b698dSJakub Kicinski err = register_pernet_subsys(&tls_proc_ops); 867d26b698dSJakub Kicinski if (err) 868d26b698dSJakub Kicinski return err; 869d26b698dSJakub Kicinski 870c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 871c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 872d4ffb02dSWillem de Bruijn tls_sw_proto_ops.sendpage_locked = tls_sw_sendpage_locked, 873c46234ebSDave Watson 874e8f69799SIlya Lesokhin tls_device_init(); 8753c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 8763c4d7559SDave Watson 8773c4d7559SDave Watson return 0; 8783c4d7559SDave Watson } 8793c4d7559SDave Watson 8803c4d7559SDave Watson static void __exit tls_unregister(void) 8813c4d7559SDave Watson { 8823c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 883e8f69799SIlya Lesokhin tls_device_cleanup(); 884d26b698dSJakub Kicinski unregister_pernet_subsys(&tls_proc_ops); 8853c4d7559SDave Watson } 8863c4d7559SDave Watson 8873c4d7559SDave Watson module_init(tls_register); 8883c4d7559SDave Watson module_exit(tls_unregister); 889