| /* |
| * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved. |
| * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include <linux/module.h> |
| |
| #include <net/tcp.h> |
| #include <net/inet_common.h> |
| #include <linux/highmem.h> |
| #include <linux/netdevice.h> |
| #include <linux/sched/signal.h> |
| #include <linux/inetdevice.h> |
| |
| #include <net/tls.h> |
| |
| MODULE_AUTHOR("Mellanox Technologies"); |
| MODULE_DESCRIPTION("Transport Layer Security Support"); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| MODULE_ALIAS_TCP_ULP("tls"); |
| |
| enum { |
| TLSV4, |
| TLSV6, |
| TLS_NUM_PROTS, |
| }; |
| |
| static struct proto *saved_tcpv6_prot; |
| static DEFINE_MUTEX(tcpv6_prot_mutex); |
| static LIST_HEAD(device_list); |
| static DEFINE_MUTEX(device_mutex); |
| static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; |
| static struct proto_ops tls_sw_proto_ops; |
| |
| static void update_sk_prot(struct sock *sk, struct tls_context *ctx) |
| { |
| int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; |
| |
| sk->sk_prot = &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]; |
| } |
| |
| int wait_on_pending_writer(struct sock *sk, long *timeo) |
| { |
| int rc = 0; |
| DEFINE_WAIT_FUNC(wait, woken_wake_function); |
| |
| add_wait_queue(sk_sleep(sk), &wait); |
| while (1) { |
| if (!*timeo) { |
| rc = -EAGAIN; |
| break; |
| } |
| |
| if (signal_pending(current)) { |
| rc = sock_intr_errno(*timeo); |
| break; |
| } |
| |
| if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) |
| break; |
| } |
| remove_wait_queue(sk_sleep(sk), &wait); |
| return rc; |
| } |
| |
| int tls_push_sg(struct sock *sk, |
| struct tls_context *ctx, |
| struct scatterlist *sg, |
| u16 first_offset, |
| int flags) |
| { |
| int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; |
| int ret = 0; |
| struct page *p; |
| size_t size; |
| int offset = first_offset; |
| |
| size = sg->length - offset; |
| offset += sg->offset; |
| |
| ctx->in_tcp_sendpages = true; |
| while (1) { |
| if (sg_is_last(sg)) |
| sendpage_flags = flags; |
| |
| /* is sending application-limited? */ |
| tcp_rate_check_app_limited(sk); |
| p = sg_page(sg); |
| retry: |
| ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); |
| |
| if (ret != size) { |
| if (ret > 0) { |
| offset += ret; |
| size -= ret; |
| goto retry; |
| } |
| |
| offset -= sg->offset; |
| ctx->partially_sent_offset = offset; |
| ctx->partially_sent_record = (void *)sg; |
| ctx->in_tcp_sendpages = false; |
| return ret; |
| } |
| |
| put_page(p); |
| sk_mem_uncharge(sk, sg->length); |
| sg = sg_next(sg); |
| if (!sg) |
| break; |
| |
| offset = sg->offset; |
| size = sg->length; |
| } |
| |
| ctx->in_tcp_sendpages = false; |
| ctx->sk_write_space(sk); |
| |
| return 0; |
| } |
| |
| static int tls_handle_open_record(struct sock *sk, int flags) |
| { |
| struct tls_context *ctx = tls_get_ctx(sk); |
| |
| if (tls_is_pending_open_record(ctx)) |
| return ctx->push_pending_record(sk, flags); |
| |
| return 0; |
| } |
| |
| int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, |
| unsigned char *record_type) |
| { |
| struct cmsghdr *cmsg; |
| int rc = -EINVAL; |
| |
| for_each_cmsghdr(cmsg, msg) { |
| if (!CMSG_OK(msg, cmsg)) |
| return -EINVAL; |
| if (cmsg->cmsg_level != SOL_TLS) |
| continue; |
| |
| switch (cmsg->cmsg_type) { |
| case TLS_SET_RECORD_TYPE: |
| if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) |
| return -EINVAL; |
| |
| if (msg->msg_flags & MSG_MORE) |
| return -EINVAL; |
| |
| rc = tls_handle_open_record(sk, msg->msg_flags); |
| if (rc) |
| return rc; |
| |
| *record_type = *(unsigned char *)CMSG_DATA(cmsg); |
| rc = 0; |
| break; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| return rc; |
| } |
| |
| int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, |
| int flags) |
| { |
| struct scatterlist *sg; |
| u16 offset; |
| |
| sg = ctx->partially_sent_record; |
| offset = ctx->partially_sent_offset; |
| |
| ctx->partially_sent_record = NULL; |
| return tls_push_sg(sk, ctx, sg, offset, flags); |
| } |
| |
| int tls_push_pending_closed_record(struct sock *sk, |
| struct tls_context *tls_ctx, |
| int flags, long *timeo) |
| { |
| struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
| |
| if (tls_is_partially_sent_record(tls_ctx) || |
| !list_empty(&ctx->tx_list)) |
| return tls_tx_records(sk, flags); |
| else |
| return tls_ctx->push_pending_record(sk, flags); |
| } |
| |
| static void tls_write_space(struct sock *sk) |
| { |
| struct tls_context *ctx = tls_get_ctx(sk); |
| struct tls_sw_context_tx *tx_ctx = tls_sw_ctx_tx(ctx); |
| |
| /* If in_tcp_sendpages call lower protocol write space handler |
| * to ensure we wake up any waiting operations there. For example |
| * if do_tcp_sendpages where to call sk_wait_event. |
| */ |
| if (ctx->in_tcp_sendpages) { |
| ctx->sk_write_space(sk); |
| return; |
| } |
| |
| /* Schedule the transmission if tx list is ready */ |
| if (is_tx_ready(tx_ctx) && !sk->sk_write_pending) { |
| /* Schedule the transmission */ |
| if (!test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask)) |
| schedule_delayed_work(&tx_ctx->tx_work.work, 0); |
| } |
| |
| ctx->sk_write_space(sk); |
| } |
| |
| static void tls_ctx_free(struct tls_context *ctx) |
| { |
| if (!ctx) |
| return; |
| |
| memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); |
| memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); |
| kfree(ctx); |
| } |
| |
| static void tls_sk_proto_close(struct sock *sk, long timeout) |
| { |
| struct tls_context *ctx = tls_get_ctx(sk); |
| long timeo = sock_sndtimeo(sk, 0); |
| void (*sk_proto_close)(struct sock *sk, long timeout); |
| bool free_ctx = false; |
| |
| lock_sock(sk); |
| sk_proto_close = ctx->sk_proto_close; |
| |
| if ((ctx->tx_conf == TLS_HW_RECORD && ctx->rx_conf == TLS_HW_RECORD) || |
| (ctx->tx_conf == TLS_BASE && ctx->rx_conf == TLS_BASE)) { |
| free_ctx = true; |
| goto skip_tx_cleanup; |
| } |
| |
| if (!tls_complete_pending_work(sk, ctx, 0, &timeo)) |
| tls_handle_open_record(sk, 0); |
| |
| /* We need these for tls_sw_fallback handling of other packets */ |
| if (ctx->tx_conf == TLS_SW) { |
| kfree(ctx->tx.rec_seq); |
| kfree(ctx->tx.iv); |
| tls_sw_free_resources_tx(sk); |
| } |
| |
| if (ctx->rx_conf == TLS_SW) { |
| kfree(ctx->rx.rec_seq); |
| kfree(ctx->rx.iv); |
| tls_sw_free_resources_rx(sk); |
| } |
| |
| #ifdef CONFIG_TLS_DEVICE |
| if (ctx->rx_conf == TLS_HW) |
| tls_device_offload_cleanup_rx(sk); |
| |
| if (ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW) { |
| #else |
| { |
| #endif |
| tls_ctx_free(ctx); |
| ctx = NULL; |
| } |
| |
| skip_tx_cleanup: |
| release_sock(sk); |
| sk_proto_close(sk, timeout); |
| /* free ctx for TLS_HW_RECORD, used by tcp_set_state |
| * for sk->sk_prot->unhash [tls_hw_unhash] |
| */ |
| if (free_ctx) |
| tls_ctx_free(ctx); |
| } |
| |
| static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, |
| int __user *optlen) |
| { |
| int rc = 0; |
| struct tls_context *ctx = tls_get_ctx(sk); |
| struct tls_crypto_info *crypto_info; |
| int len; |
| |
| if (get_user(len, optlen)) |
| return -EFAULT; |
| |
| if (!optval || (len < sizeof(*crypto_info))) { |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| if (!ctx) { |
| rc = -EBUSY; |
| goto out; |
| } |
| |
| /* get user crypto info */ |
| crypto_info = &ctx->crypto_send.info; |
| |
| if (!TLS_CRYPTO_INFO_READY(crypto_info)) { |
| rc = -EBUSY; |
| goto out; |
| } |
| |
| if (len == sizeof(*crypto_info)) { |
| if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) |
| rc = -EFAULT; |
| goto out; |
| } |
| |
| switch (crypto_info->cipher_type) { |
| case TLS_CIPHER_AES_GCM_128: { |
| struct tls12_crypto_info_aes_gcm_128 * |
| crypto_info_aes_gcm_128 = |
| container_of(crypto_info, |
| struct tls12_crypto_info_aes_gcm_128, |
| info); |
| |
| if (len != sizeof(*crypto_info_aes_gcm_128)) { |
| rc = -EINVAL; |
| goto out; |
| } |
| lock_sock(sk); |
| memcpy(crypto_info_aes_gcm_128->iv, |
| ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, |
| TLS_CIPHER_AES_GCM_128_IV_SIZE); |
| memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq, |
| TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); |
| release_sock(sk); |
| if (copy_to_user(optval, |
| crypto_info_aes_gcm_128, |
| sizeof(*crypto_info_aes_gcm_128))) |
| rc = -EFAULT; |
| break; |
| } |
| default: |
| rc = -EINVAL; |
| } |
| |
| out: |
| return rc; |
| } |
| |
| static int do_tls_getsockopt(struct sock *sk, int optname, |
| char __user *optval, int __user *optlen) |
| { |
| int rc = 0; |
| |
| switch (optname) { |
| case TLS_TX: |
| rc = do_tls_getsockopt_tx(sk, optval, optlen); |
| break; |
| default: |
| rc = -ENOPROTOOPT; |
| break; |
| } |
| return rc; |
| } |
| |
| static int tls_getsockopt(struct sock *sk, int level, int optname, |
| char __user *optval, int __user *optlen) |
| { |
| struct tls_context *ctx = tls_get_ctx(sk); |
| |
| if (level != SOL_TLS) |
| return ctx->getsockopt(sk, level, optname, optval, optlen); |
| |
| return do_tls_getsockopt(sk, optname, optval, optlen); |
| } |
| |
| static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval, |
| unsigned int optlen, int tx) |
| { |
| struct tls_crypto_info *crypto_info; |
| struct tls_context *ctx = tls_get_ctx(sk); |
| int rc = 0; |
| int conf; |
| |
| if (!optval || (optlen < sizeof(*crypto_info))) { |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| if (tx) |
| crypto_info = &ctx->crypto_send.info; |
| else |
| crypto_info = &ctx->crypto_recv.info; |
| |
| /* Currently we don't support set crypto info more than one time */ |
| if (TLS_CRYPTO_INFO_READY(crypto_info)) { |
| rc = -EBUSY; |
| goto out; |
| } |
| |
| rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); |
| if (rc) { |
| rc = -EFAULT; |
| goto err_crypto_info; |
| } |
| |
| /* check version */ |
| if (crypto_info->version != TLS_1_2_VERSION) { |
| rc = -ENOTSUPP; |
| goto err_crypto_info; |
| } |
| |
| switch (crypto_info->cipher_type) { |
| case TLS_CIPHER_AES_GCM_128: { |
| if (optlen != sizeof(struct tls12_crypto_info_aes_gcm_128)) { |
| rc = -EINVAL; |
| goto err_crypto_info; |
| } |
| rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info), |
| optlen - sizeof(*crypto_info)); |
| if (rc) { |
| rc = -EFAULT; |
| goto err_crypto_info; |
| } |
| break; |
| } |
| default: |
| rc = -EINVAL; |
| goto err_crypto_info; |
| } |
| |
| if (tx) { |
| #ifdef CONFIG_TLS_DEVICE |
| rc = tls_set_device_offload(sk, ctx); |
| conf = TLS_HW; |
| if (rc) { |
| #else |
| { |
| #endif |
| rc = tls_set_sw_offload(sk, ctx, 1); |
| conf = TLS_SW; |
| } |
| } else { |
| #ifdef CONFIG_TLS_DEVICE |
| rc = tls_set_device_offload_rx(sk, ctx); |
| conf = TLS_HW; |
| if (rc) { |
| #else |
| { |
| #endif |
| rc = tls_set_sw_offload(sk, ctx, 0); |
| conf = TLS_SW; |
| } |
| } |
| |
| if (rc) |
| goto err_crypto_info; |
| |
| if (tx) |
| ctx->tx_conf = conf; |
| else |
| ctx->rx_conf = conf; |
| update_sk_prot(sk, ctx); |
| if (tx) { |
| ctx->sk_write_space = sk->sk_write_space; |
| sk->sk_write_space = tls_write_space; |
| } else { |
| sk->sk_socket->ops = &tls_sw_proto_ops; |
| } |
| goto out; |
| |
| err_crypto_info: |
| memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); |
| out: |
| return rc; |
| } |
| |
| static int do_tls_setsockopt(struct sock *sk, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| int rc = 0; |
| |
| switch (optname) { |
| case TLS_TX: |
| case TLS_RX: |
| lock_sock(sk); |
| rc = do_tls_setsockopt_conf(sk, optval, optlen, |
| optname == TLS_TX); |
| release_sock(sk); |
| break; |
| default: |
| rc = -ENOPROTOOPT; |
| break; |
| } |
| return rc; |
| } |
| |
| static int tls_setsockopt(struct sock *sk, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| struct tls_context *ctx = tls_get_ctx(sk); |
| |
| if (level != SOL_TLS) |
| return ctx->setsockopt(sk, level, optname, optval, optlen); |
| |
| return do_tls_setsockopt(sk, optname, optval, optlen); |
| } |
| |
| static struct tls_context *create_ctx(struct sock *sk) |
| { |
| struct inet_connection_sock *icsk = inet_csk(sk); |
| struct tls_context *ctx; |
| |
| ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
| if (!ctx) |
| return NULL; |
| |
| icsk->icsk_ulp_data = ctx; |
| return ctx; |
| } |
| |
| static int tls_hw_prot(struct sock *sk) |
| { |
| struct tls_context *ctx; |
| struct tls_device *dev; |
| int rc = 0; |
| |
| mutex_lock(&device_mutex); |
| list_for_each_entry(dev, &device_list, dev_list) { |
| if (dev->feature && dev->feature(dev)) { |
| ctx = create_ctx(sk); |
| if (!ctx) |
| goto out; |
| |
| ctx->hash = sk->sk_prot->hash; |
| ctx->unhash = sk->sk_prot->unhash; |
| ctx->sk_proto_close = sk->sk_prot->close; |
| ctx->rx_conf = TLS_HW_RECORD; |
| ctx->tx_conf = TLS_HW_RECORD; |
| update_sk_prot(sk, ctx); |
| rc = 1; |
| break; |
| } |
| } |
| out: |
| mutex_unlock(&device_mutex); |
| return rc; |
| } |
| |
| static void tls_hw_unhash(struct sock *sk) |
| { |
| struct tls_context *ctx = tls_get_ctx(sk); |
| struct tls_device *dev; |
| |
| mutex_lock(&device_mutex); |
| list_for_each_entry(dev, &device_list, dev_list) { |
| if (dev->unhash) |
| dev->unhash(dev, sk); |
| } |
| mutex_unlock(&device_mutex); |
| ctx->unhash(sk); |
| } |
| |
| static int tls_hw_hash(struct sock *sk) |
| { |
| struct tls_context *ctx = tls_get_ctx(sk); |
| struct tls_device *dev; |
| int err; |
| |
| err = ctx->hash(sk); |
| mutex_lock(&device_mutex); |
| list_for_each_entry(dev, &device_list, dev_list) { |
| if (dev->hash) |
| err |= dev->hash(dev, sk); |
| } |
| mutex_unlock(&device_mutex); |
| |
| if (err) |
| tls_hw_unhash(sk); |
| return err; |
| } |
| |
| static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
| struct proto *base) |
| { |
| prot[TLS_BASE][TLS_BASE] = *base; |
| prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; |
| prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; |
| prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; |
| |
| prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; |
| prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; |
| prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; |
| |
| prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; |
| prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; |
| prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read; |
| prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; |
| |
| prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; |
| prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; |
| prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read; |
| prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; |
| |
| #ifdef CONFIG_TLS_DEVICE |
| prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; |
| prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; |
| prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; |
| |
| prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; |
| prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; |
| prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; |
| |
| prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; |
| |
| prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; |
| |
| prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; |
| #endif |
| |
| prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; |
| prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_hw_hash; |
| prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_hw_unhash; |
| prot[TLS_HW_RECORD][TLS_HW_RECORD].close = tls_sk_proto_close; |
| } |
| |
| static int tls_init(struct sock *sk) |
| { |
| int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; |
| struct tls_context *ctx; |
| int rc = 0; |
| |
| if (tls_hw_prot(sk)) |
| goto out; |
| |
| /* The TLS ulp is currently supported only for TCP sockets |
| * in ESTABLISHED state. |
| * Supporting sockets in LISTEN state will require us |
| * to modify the accept implementation to clone rather then |
| * share the ulp context. |
| */ |
| if (sk->sk_state != TCP_ESTABLISHED) |
| return -ENOTSUPP; |
| |
| /* allocate tls context */ |
| ctx = create_ctx(sk); |
| if (!ctx) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| ctx->setsockopt = sk->sk_prot->setsockopt; |
| ctx->getsockopt = sk->sk_prot->getsockopt; |
| ctx->sk_proto_close = sk->sk_prot->close; |
| |
| /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ |
| if (ip_ver == TLSV6 && |
| unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) { |
| mutex_lock(&tcpv6_prot_mutex); |
| if (likely(sk->sk_prot != saved_tcpv6_prot)) { |
| build_protos(tls_prots[TLSV6], sk->sk_prot); |
| smp_store_release(&saved_tcpv6_prot, sk->sk_prot); |
| } |
| mutex_unlock(&tcpv6_prot_mutex); |
| } |
| |
| ctx->tx_conf = TLS_BASE; |
| ctx->rx_conf = TLS_BASE; |
| update_sk_prot(sk, ctx); |
| out: |
| return rc; |
| } |
| |
| void tls_register_device(struct tls_device *device) |
| { |
| mutex_lock(&device_mutex); |
| list_add_tail(&device->dev_list, &device_list); |
| mutex_unlock(&device_mutex); |
| } |
| EXPORT_SYMBOL(tls_register_device); |
| |
| void tls_unregister_device(struct tls_device *device) |
| { |
| mutex_lock(&device_mutex); |
| list_del(&device->dev_list); |
| mutex_unlock(&device_mutex); |
| } |
| EXPORT_SYMBOL(tls_unregister_device); |
| |
| static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { |
| .name = "tls", |
| .owner = THIS_MODULE, |
| .init = tls_init, |
| }; |
| |
| static int __init tls_register(void) |
| { |
| build_protos(tls_prots[TLSV4], &tcp_prot); |
| |
| tls_sw_proto_ops = inet_stream_ops; |
| tls_sw_proto_ops.splice_read = tls_sw_splice_read; |
| |
| #ifdef CONFIG_TLS_DEVICE |
| tls_device_init(); |
| #endif |
| tcp_register_ulp(&tcp_tls_ulp_ops); |
| |
| return 0; |
| } |
| |
| static void __exit tls_unregister(void) |
| { |
| tcp_unregister_ulp(&tcp_tls_ulp_ops); |
| #ifdef CONFIG_TLS_DEVICE |
| tls_device_cleanup(); |
| #endif |
| } |
| |
| module_init(tls_register); |
| module_exit(tls_unregister); |