Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1151 insertions, 0 deletions

diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
new file mode 100644
index 0000000000..002483e60c
--- /dev/null
+++ b/net/tls/tls_main.c
@@ -0,0 +1,1151 @@
+/*
+ * 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 <linux/inet_diag.h>
+
+#include <net/snmp.h>
+#include <net/tls.h>
+#include <net/tls_toe.h>
+
+#include "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,
+};
+
+#define CHECK_CIPHER_DESC(cipher,ci)				\
+	static_assert(cipher ## _IV_SIZE <= MAX_IV_SIZE);		\
+	static_assert(cipher ## _REC_SEQ_SIZE <= TLS_MAX_REC_SEQ_SIZE);	\
+	static_assert(cipher ## _TAG_SIZE == TLS_TAG_SIZE);		\
+	static_assert(sizeof_field(struct ci, iv) == cipher ## _IV_SIZE);	\
+	static_assert(sizeof_field(struct ci, key) == cipher ## _KEY_SIZE);	\
+	static_assert(sizeof_field(struct ci, salt) == cipher ## _SALT_SIZE);	\
+	static_assert(sizeof_field(struct ci, rec_seq) == cipher ## _REC_SEQ_SIZE);
+
+#define __CIPHER_DESC(ci) \
+	.iv_offset = offsetof(struct ci, iv), \
+	.key_offset = offsetof(struct ci, key), \
+	.salt_offset = offsetof(struct ci, salt), \
+	.rec_seq_offset = offsetof(struct ci, rec_seq), \
+	.crypto_info = sizeof(struct ci)
+
+#define CIPHER_DESC(cipher,ci,algname,_offloadable) [cipher - TLS_CIPHER_MIN] = {	\
+	.nonce = cipher ## _IV_SIZE, \
+	.iv = cipher ## _IV_SIZE, \
+	.key = cipher ## _KEY_SIZE, \
+	.salt = cipher ## _SALT_SIZE, \
+	.tag = cipher ## _TAG_SIZE, \
+	.rec_seq = cipher ## _REC_SEQ_SIZE, \
+	.cipher_name = algname,	\
+	.offloadable = _offloadable, \
+	__CIPHER_DESC(ci), \
+}
+
+#define CIPHER_DESC_NONCE0(cipher,ci,algname,_offloadable) [cipher - TLS_CIPHER_MIN] = { \
+	.nonce = 0, \
+	.iv = cipher ## _IV_SIZE, \
+	.key = cipher ## _KEY_SIZE, \
+	.salt = cipher ## _SALT_SIZE, \
+	.tag = cipher ## _TAG_SIZE, \
+	.rec_seq = cipher ## _REC_SEQ_SIZE, \
+	.cipher_name = algname,	\
+	.offloadable = _offloadable, \
+	__CIPHER_DESC(ci), \
+}
+
+const struct tls_cipher_desc tls_cipher_desc[TLS_CIPHER_MAX + 1 - TLS_CIPHER_MIN] = {
+	CIPHER_DESC(TLS_CIPHER_AES_GCM_128, tls12_crypto_info_aes_gcm_128, "gcm(aes)", true),
+	CIPHER_DESC(TLS_CIPHER_AES_GCM_256, tls12_crypto_info_aes_gcm_256, "gcm(aes)", true),
+	CIPHER_DESC(TLS_CIPHER_AES_CCM_128, tls12_crypto_info_aes_ccm_128, "ccm(aes)", false),
+	CIPHER_DESC_NONCE0(TLS_CIPHER_CHACHA20_POLY1305, tls12_crypto_info_chacha20_poly1305, "rfc7539(chacha20,poly1305)", false),
+	CIPHER_DESC(TLS_CIPHER_SM4_GCM, tls12_crypto_info_sm4_gcm, "gcm(sm4)", false),
+	CIPHER_DESC(TLS_CIPHER_SM4_CCM, tls12_crypto_info_sm4_ccm, "ccm(sm4)", false),
+	CIPHER_DESC(TLS_CIPHER_ARIA_GCM_128, tls12_crypto_info_aria_gcm_128, "gcm(aria)", false),
+	CIPHER_DESC(TLS_CIPHER_ARIA_GCM_256, tls12_crypto_info_aria_gcm_256, "gcm(aria)", false),
+};
+
+CHECK_CIPHER_DESC(TLS_CIPHER_AES_GCM_128, tls12_crypto_info_aes_gcm_128);
+CHECK_CIPHER_DESC(TLS_CIPHER_AES_GCM_256, tls12_crypto_info_aes_gcm_256);
+CHECK_CIPHER_DESC(TLS_CIPHER_AES_CCM_128, tls12_crypto_info_aes_ccm_128);
+CHECK_CIPHER_DESC(TLS_CIPHER_CHACHA20_POLY1305, tls12_crypto_info_chacha20_poly1305);
+CHECK_CIPHER_DESC(TLS_CIPHER_SM4_GCM, tls12_crypto_info_sm4_gcm);
+CHECK_CIPHER_DESC(TLS_CIPHER_SM4_CCM, tls12_crypto_info_sm4_ccm);
+CHECK_CIPHER_DESC(TLS_CIPHER_ARIA_GCM_128, tls12_crypto_info_aria_gcm_128);
+CHECK_CIPHER_DESC(TLS_CIPHER_ARIA_GCM_256, tls12_crypto_info_aria_gcm_256);
+
+static const struct proto *saved_tcpv6_prot;
+static DEFINE_MUTEX(tcpv6_prot_mutex);
+static const struct proto *saved_tcpv4_prot;
+static DEFINE_MUTEX(tcpv4_prot_mutex);
+static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
+static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
+static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
+			 const struct proto *base);
+
+void update_sk_prot(struct sock *sk, struct tls_context *ctx)
+{
+	int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
+
+	WRITE_ONCE(sk->sk_prot,
+		   &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]);
+	WRITE_ONCE(sk->sk_socket->ops,
+		   &tls_proto_ops[ip_ver][ctx->tx_conf][ctx->rx_conf]);
+}
+
+int wait_on_pending_writer(struct sock *sk, long *timeo)
+{
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+	int ret, rc = 0;
+
+	add_wait_queue(sk_sleep(sk), &wait);
+	while (1) {
+		if (!*timeo) {
+			rc = -EAGAIN;
+			break;
+		}
+
+		if (signal_pending(current)) {
+			rc = sock_intr_errno(*timeo);
+			break;
+		}
+
+		ret = sk_wait_event(sk, timeo,
+				    !READ_ONCE(sk->sk_write_pending), &wait);
+		if (ret) {
+			if (ret < 0)
+				rc = ret;
+			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)
+{
+	struct bio_vec bvec;
+	struct msghdr msg = {
+		.msg_flags = MSG_SPLICE_PAGES | flags,
+	};
+	int ret = 0;
+	struct page *p;
+	size_t size;
+	int offset = first_offset;
+
+	size = sg->length - offset;
+	offset += sg->offset;
+
+	ctx->splicing_pages = true;
+	while (1) {
+		/* is sending application-limited? */
+		tcp_rate_check_app_limited(sk);
+		p = sg_page(sg);
+retry:
+		bvec_set_page(&bvec, p, size, offset);
+		iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size);
+
+		ret = tcp_sendmsg_locked(sk, &msg, size);
+
+		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->splicing_pages = 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->splicing_pages = false;
+
+	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_process_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);
+}
+
+void tls_free_partial_record(struct sock *sk, struct tls_context *ctx)
+{
+	struct scatterlist *sg;
+
+	for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) {
+		put_page(sg_page(sg));
+		sk_mem_uncharge(sk, sg->length);
+	}
+	ctx->partially_sent_record = NULL;
+}
+
+static void tls_write_space(struct sock *sk)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+
+	/* If splicing_pages call lower protocol write space handler
+	 * to ensure we wake up any waiting operations there. For example
+	 * if splicing pages where to call sk_wait_event.
+	 */
+	if (ctx->splicing_pages) {
+		ctx->sk_write_space(sk);
+		return;
+	}
+
+#ifdef CONFIG_TLS_DEVICE
+	if (ctx->tx_conf == TLS_HW)
+		tls_device_write_space(sk, ctx);
+	else
+#endif
+		tls_sw_write_space(sk, ctx);
+
+	ctx->sk_write_space(sk);
+}
+
+/**
+ * tls_ctx_free() - free TLS ULP context
+ * @sk:  socket to with @ctx is attached
+ * @ctx: TLS context structure
+ *
+ * Free TLS context. If @sk is %NULL caller guarantees that the socket
+ * to which @ctx was attached has no outstanding references.
+ */
+void tls_ctx_free(struct sock *sk, 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));
+	mutex_destroy(&ctx->tx_lock);
+
+	if (sk)
+		kfree_rcu(ctx, rcu);
+	else
+		kfree(ctx);
+}
+
+static void tls_sk_proto_cleanup(struct sock *sk,
+				 struct tls_context *ctx, long timeo)
+{
+	if (unlikely(sk->sk_write_pending) &&
+	    !wait_on_pending_writer(sk, &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_release_resources_tx(sk);
+		TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
+	} else if (ctx->tx_conf == TLS_HW) {
+		tls_device_free_resources_tx(sk);
+		TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
+	}
+
+	if (ctx->rx_conf == TLS_SW) {
+		tls_sw_release_resources_rx(sk);
+		TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW);
+	} else if (ctx->rx_conf == TLS_HW) {
+		tls_device_offload_cleanup_rx(sk);
+		TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
+	}
+}
+
+static void tls_sk_proto_close(struct sock *sk, long timeout)
+{
+	struct inet_connection_sock *icsk = inet_csk(sk);
+	struct tls_context *ctx = tls_get_ctx(sk);
+	long timeo = sock_sndtimeo(sk, 0);
+	bool free_ctx;
+
+	if (ctx->tx_conf == TLS_SW)
+		tls_sw_cancel_work_tx(ctx);
+
+	lock_sock(sk);
+	free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW;
+
+	if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE)
+		tls_sk_proto_cleanup(sk, ctx, timeo);
+
+	write_lock_bh(&sk->sk_callback_lock);
+	if (free_ctx)
+		rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
+	WRITE_ONCE(sk->sk_prot, ctx->sk_proto);
+	if (sk->sk_write_space == tls_write_space)
+		sk->sk_write_space = ctx->sk_write_space;
+	write_unlock_bh(&sk->sk_callback_lock);
+	release_sock(sk);
+	if (ctx->tx_conf == TLS_SW)
+		tls_sw_free_ctx_tx(ctx);
+	if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW)
+		tls_sw_strparser_done(ctx);
+	if (ctx->rx_conf == TLS_SW)
+		tls_sw_free_ctx_rx(ctx);
+	ctx->sk_proto->close(sk, timeout);
+
+	if (free_ctx)
+		tls_ctx_free(sk, ctx);
+}
+
+static __poll_t tls_sk_poll(struct file *file, struct socket *sock,
+			    struct poll_table_struct *wait)
+{
+	struct tls_sw_context_rx *ctx;
+	struct tls_context *tls_ctx;
+	struct sock *sk = sock->sk;
+	struct sk_psock *psock;
+	__poll_t mask = 0;
+	u8 shutdown;
+	int state;
+
+	mask = tcp_poll(file, sock, wait);
+
+	state = inet_sk_state_load(sk);
+	shutdown = READ_ONCE(sk->sk_shutdown);
+	if (unlikely(state != TCP_ESTABLISHED || shutdown & RCV_SHUTDOWN))
+		return mask;
+
+	tls_ctx = tls_get_ctx(sk);
+	ctx = tls_sw_ctx_rx(tls_ctx);
+	psock = sk_psock_get(sk);
+
+	if (skb_queue_empty_lockless(&ctx->rx_list) &&
+	    !tls_strp_msg_ready(ctx) &&
+	    sk_psock_queue_empty(psock))
+		mask &= ~(EPOLLIN | EPOLLRDNORM);
+
+	if (psock)
+		sk_psock_put(sk, psock);
+
+	return mask;
+}
+
+static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval,
+				  int __user *optlen, int tx)
+{
+	int rc = 0;
+	const struct tls_cipher_desc *cipher_desc;
+	struct tls_context *ctx = tls_get_ctx(sk);
+	struct tls_crypto_info *crypto_info;
+	struct cipher_context *cctx;
+	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 */
+	if (tx) {
+		crypto_info = &ctx->crypto_send.info;
+		cctx = &ctx->tx;
+	} else {
+		crypto_info = &ctx->crypto_recv.info;
+		cctx = &ctx->rx;
+	}
+
+	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;
+	}
+
+	cipher_desc = get_cipher_desc(crypto_info->cipher_type);
+	if (!cipher_desc || len != cipher_desc->crypto_info) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	memcpy(crypto_info_iv(crypto_info, cipher_desc),
+	       cctx->iv + cipher_desc->salt, cipher_desc->iv);
+	memcpy(crypto_info_rec_seq(crypto_info, cipher_desc),
+	       cctx->rec_seq, cipher_desc->rec_seq);
+
+	if (copy_to_user(optval, crypto_info, cipher_desc->crypto_info))
+		rc = -EFAULT;
+
+out:
+	return rc;
+}
+
+static int do_tls_getsockopt_tx_zc(struct sock *sk, char __user *optval,
+				   int __user *optlen)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+	unsigned int value;
+	int len;
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	if (len != sizeof(value))
+		return -EINVAL;
+
+	value = ctx->zerocopy_sendfile;
+	if (copy_to_user(optval, &value, sizeof(value)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int do_tls_getsockopt_no_pad(struct sock *sk, char __user *optval,
+				    int __user *optlen)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+	int value, len;
+
+	if (ctx->prot_info.version != TLS_1_3_VERSION)
+		return -EINVAL;
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+	if (len < sizeof(value))
+		return -EINVAL;
+
+	value = -EINVAL;
+	if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW)
+		value = ctx->rx_no_pad;
+	if (value < 0)
+		return value;
+
+	if (put_user(sizeof(value), optlen))
+		return -EFAULT;
+	if (copy_to_user(optval, &value, sizeof(value)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int do_tls_getsockopt(struct sock *sk, int optname,
+			     char __user *optval, int __user *optlen)
+{
+	int rc = 0;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case TLS_TX:
+	case TLS_RX:
+		rc = do_tls_getsockopt_conf(sk, optval, optlen,
+					    optname == TLS_TX);
+		break;
+	case TLS_TX_ZEROCOPY_RO:
+		rc = do_tls_getsockopt_tx_zc(sk, optval, optlen);
+		break;
+	case TLS_RX_EXPECT_NO_PAD:
+		rc = do_tls_getsockopt_no_pad(sk, optval, optlen);
+		break;
+	default:
+		rc = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+
+	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->sk_proto->getsockopt(sk, level,
+						 optname, optval, optlen);
+
+	return do_tls_getsockopt(sk, optname, optval, optlen);
+}
+
+static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
+				  unsigned int optlen, int tx)
+{
+	struct tls_crypto_info *crypto_info;
+	struct tls_crypto_info *alt_crypto_info;
+	struct tls_context *ctx = tls_get_ctx(sk);
+	const struct tls_cipher_desc *cipher_desc;
+	int rc = 0;
+	int conf;
+
+	if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info)))
+		return -EINVAL;
+
+	if (tx) {
+		crypto_info = &ctx->crypto_send.info;
+		alt_crypto_info = &ctx->crypto_recv.info;
+	} else {
+		crypto_info = &ctx->crypto_recv.info;
+		alt_crypto_info = &ctx->crypto_send.info;
+	}
+
+	/* Currently we don't support set crypto info more than one time */
+	if (TLS_CRYPTO_INFO_READY(crypto_info))
+		return -EBUSY;
+
+	rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info));
+	if (rc) {
+		rc = -EFAULT;
+		goto err_crypto_info;
+	}
+
+	/* check version */
+	if (crypto_info->version != TLS_1_2_VERSION &&
+	    crypto_info->version != TLS_1_3_VERSION) {
+		rc = -EINVAL;
+		goto err_crypto_info;
+	}
+
+	/* Ensure that TLS version and ciphers are same in both directions */
+	if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
+		if (alt_crypto_info->version != crypto_info->version ||
+		    alt_crypto_info->cipher_type != crypto_info->cipher_type) {
+			rc = -EINVAL;
+			goto err_crypto_info;
+		}
+	}
+
+	cipher_desc = get_cipher_desc(crypto_info->cipher_type);
+	if (!cipher_desc) {
+		rc = -EINVAL;
+		goto err_crypto_info;
+	}
+
+	switch (crypto_info->cipher_type) {
+	case TLS_CIPHER_ARIA_GCM_128:
+	case TLS_CIPHER_ARIA_GCM_256:
+		if (crypto_info->version != TLS_1_2_VERSION) {
+			rc = -EINVAL;
+			goto err_crypto_info;
+		}
+		break;
+	}
+
+	if (optlen != cipher_desc->crypto_info) {
+		rc = -EINVAL;
+		goto err_crypto_info;
+	}
+
+	rc = copy_from_sockptr_offset(crypto_info + 1, optval,
+				      sizeof(*crypto_info),
+				      optlen - sizeof(*crypto_info));
+	if (rc) {
+		rc = -EFAULT;
+		goto err_crypto_info;
+	}
+
+	if (tx) {
+		rc = tls_set_device_offload(sk, ctx);
+		conf = TLS_HW;
+		if (!rc) {
+			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE);
+			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
+		} else {
+			rc = tls_set_sw_offload(sk, ctx, 1);
+			if (rc)
+				goto err_crypto_info;
+			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW);
+			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
+			conf = TLS_SW;
+		}
+	} else {
+		rc = tls_set_device_offload_rx(sk, ctx);
+		conf = TLS_HW;
+		if (!rc) {
+			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE);
+			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
+		} else {
+			rc = tls_set_sw_offload(sk, ctx, 0);
+			if (rc)
+				goto err_crypto_info;
+			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW);
+			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW);
+			conf = TLS_SW;
+		}
+		tls_sw_strparser_arm(sk, ctx);
+	}
+
+	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 {
+		struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(ctx);
+
+		tls_strp_check_rcv(&rx_ctx->strp);
+	}
+	return 0;
+
+err_crypto_info:
+	memzero_explicit(crypto_info, sizeof(union tls_crypto_context));
+	return rc;
+}
+
+static int do_tls_setsockopt_tx_zc(struct sock *sk, sockptr_t optval,
+				   unsigned int optlen)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+	unsigned int value;
+
+	if (sockptr_is_null(optval) || optlen != sizeof(value))
+		return -EINVAL;
+
+	if (copy_from_sockptr(&value, optval, sizeof(value)))
+		return -EFAULT;
+
+	if (value > 1)
+		return -EINVAL;
+
+	ctx->zerocopy_sendfile = value;
+
+	return 0;
+}
+
+static int do_tls_setsockopt_no_pad(struct sock *sk, sockptr_t optval,
+				    unsigned int optlen)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+	u32 val;
+	int rc;
+
+	if (ctx->prot_info.version != TLS_1_3_VERSION ||
+	    sockptr_is_null(optval) || optlen < sizeof(val))
+		return -EINVAL;
+
+	rc = copy_from_sockptr(&val, optval, sizeof(val));
+	if (rc)
+		return -EFAULT;
+	if (val > 1)
+		return -EINVAL;
+	rc = check_zeroed_sockptr(optval, sizeof(val), optlen - sizeof(val));
+	if (rc < 1)
+		return rc == 0 ? -EINVAL : rc;
+
+	lock_sock(sk);
+	rc = -EINVAL;
+	if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) {
+		ctx->rx_no_pad = val;
+		tls_update_rx_zc_capable(ctx);
+		rc = 0;
+	}
+	release_sock(sk);
+
+	return rc;
+}
+
+static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t 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;
+	case TLS_TX_ZEROCOPY_RO:
+		lock_sock(sk);
+		rc = do_tls_setsockopt_tx_zc(sk, optval, optlen);
+		release_sock(sk);
+		break;
+	case TLS_RX_EXPECT_NO_PAD:
+		rc = do_tls_setsockopt_no_pad(sk, optval, optlen);
+		break;
+	default:
+		rc = -ENOPROTOOPT;
+		break;
+	}
+	return rc;
+}
+
+static int tls_setsockopt(struct sock *sk, int level, int optname,
+			  sockptr_t optval, unsigned int optlen)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+
+	if (level != SOL_TLS)
+		return ctx->sk_proto->setsockopt(sk, level, optname, optval,
+						 optlen);
+
+	return do_tls_setsockopt(sk, optname, optval, optlen);
+}
+
+struct tls_context *tls_ctx_create(struct sock *sk)
+{
+	struct inet_connection_sock *icsk = inet_csk(sk);
+	struct tls_context *ctx;
+
+	ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
+	if (!ctx)
+		return NULL;
+
+	mutex_init(&ctx->tx_lock);
+	rcu_assign_pointer(icsk->icsk_ulp_data, ctx);
+	ctx->sk_proto = READ_ONCE(sk->sk_prot);
+	ctx->sk = sk;
+	return ctx;
+}
+
+static void build_proto_ops(struct proto_ops ops[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
+			    const struct proto_ops *base)
+{
+	ops[TLS_BASE][TLS_BASE] = *base;
+
+	ops[TLS_SW  ][TLS_BASE] = ops[TLS_BASE][TLS_BASE];
+	ops[TLS_SW  ][TLS_BASE].splice_eof	= tls_sw_splice_eof;
+
+	ops[TLS_BASE][TLS_SW  ] = ops[TLS_BASE][TLS_BASE];
+	ops[TLS_BASE][TLS_SW  ].splice_read	= tls_sw_splice_read;
+	ops[TLS_BASE][TLS_SW  ].poll		= tls_sk_poll;
+	ops[TLS_BASE][TLS_SW  ].read_sock	= tls_sw_read_sock;
+
+	ops[TLS_SW  ][TLS_SW  ] = ops[TLS_SW  ][TLS_BASE];
+	ops[TLS_SW  ][TLS_SW  ].splice_read	= tls_sw_splice_read;
+	ops[TLS_SW  ][TLS_SW  ].poll		= tls_sk_poll;
+	ops[TLS_SW  ][TLS_SW  ].read_sock	= tls_sw_read_sock;
+
+#ifdef CONFIG_TLS_DEVICE
+	ops[TLS_HW  ][TLS_BASE] = ops[TLS_BASE][TLS_BASE];
+
+	ops[TLS_HW  ][TLS_SW  ] = ops[TLS_BASE][TLS_SW  ];
+
+	ops[TLS_BASE][TLS_HW  ] = ops[TLS_BASE][TLS_SW  ];
+
+	ops[TLS_SW  ][TLS_HW  ] = ops[TLS_SW  ][TLS_SW  ];
+
+	ops[TLS_HW  ][TLS_HW  ] = ops[TLS_HW  ][TLS_SW  ];
+#endif
+#ifdef CONFIG_TLS_TOE
+	ops[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
+#endif
+}
+
+static void tls_build_proto(struct sock *sk)
+{
+	int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
+	struct proto *prot = READ_ONCE(sk->sk_prot);
+
+	/* Build IPv6 TLS whenever the address of tcpv6 _prot changes */
+	if (ip_ver == TLSV6 &&
+	    unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) {
+		mutex_lock(&tcpv6_prot_mutex);
+		if (likely(prot != saved_tcpv6_prot)) {
+			build_protos(tls_prots[TLSV6], prot);
+			build_proto_ops(tls_proto_ops[TLSV6],
+					sk->sk_socket->ops);
+			smp_store_release(&saved_tcpv6_prot, prot);
+		}
+		mutex_unlock(&tcpv6_prot_mutex);
+	}
+
+	if (ip_ver == TLSV4 &&
+	    unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) {
+		mutex_lock(&tcpv4_prot_mutex);
+		if (likely(prot != saved_tcpv4_prot)) {
+			build_protos(tls_prots[TLSV4], prot);
+			build_proto_ops(tls_proto_ops[TLSV4],
+					sk->sk_socket->ops);
+			smp_store_release(&saved_tcpv4_prot, prot);
+		}
+		mutex_unlock(&tcpv4_prot_mutex);
+	}
+}
+
+static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
+			 const 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].splice_eof	= tls_sw_splice_eof;
+
+	prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE];
+	prot[TLS_BASE][TLS_SW].recvmsg		  = tls_sw_recvmsg;
+	prot[TLS_BASE][TLS_SW].sock_is_readable   = tls_sw_sock_is_readable;
+	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].sock_is_readable   = tls_sw_sock_is_readable;
+	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].splice_eof	= tls_device_splice_eof;
+
+	prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW];
+	prot[TLS_HW][TLS_SW].sendmsg		= tls_device_sendmsg;
+	prot[TLS_HW][TLS_SW].splice_eof		= tls_device_splice_eof;
+
+	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
+#ifdef CONFIG_TLS_TOE
+	prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
+	prot[TLS_HW_RECORD][TLS_HW_RECORD].hash		= tls_toe_hash;
+	prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash	= tls_toe_unhash;
+#endif
+}
+
+static int tls_init(struct sock *sk)
+{
+	struct tls_context *ctx;
+	int rc = 0;
+
+	tls_build_proto(sk);
+
+#ifdef CONFIG_TLS_TOE
+	if (tls_toe_bypass(sk))
+		return 0;
+#endif
+
+	/* 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 -ENOTCONN;
+
+	/* allocate tls context */
+	write_lock_bh(&sk->sk_callback_lock);
+	ctx = tls_ctx_create(sk);
+	if (!ctx) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	ctx->tx_conf = TLS_BASE;
+	ctx->rx_conf = TLS_BASE;
+	update_sk_prot(sk, ctx);
+out:
+	write_unlock_bh(&sk->sk_callback_lock);
+	return rc;
+}
+
+static void tls_update(struct sock *sk, struct proto *p,
+		       void (*write_space)(struct sock *sk))
+{
+	struct tls_context *ctx;
+
+	WARN_ON_ONCE(sk->sk_prot == p);
+
+	ctx = tls_get_ctx(sk);
+	if (likely(ctx)) {
+		ctx->sk_write_space = write_space;
+		ctx->sk_proto = p;
+	} else {
+		/* Pairs with lockless read in sk_clone_lock(). */
+		WRITE_ONCE(sk->sk_prot, p);
+		sk->sk_write_space = write_space;
+	}
+}
+
+static u16 tls_user_config(struct tls_context *ctx, bool tx)
+{
+	u16 config = tx ? ctx->tx_conf : ctx->rx_conf;
+
+	switch (config) {
+	case TLS_BASE:
+		return TLS_CONF_BASE;
+	case TLS_SW:
+		return TLS_CONF_SW;
+	case TLS_HW:
+		return TLS_CONF_HW;
+	case TLS_HW_RECORD:
+		return TLS_CONF_HW_RECORD;
+	}
+	return 0;
+}
+
+static int tls_get_info(const struct sock *sk, struct sk_buff *skb)
+{
+	u16 version, cipher_type;
+	struct tls_context *ctx;
+	struct nlattr *start;
+	int err;
+
+	start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS);
+	if (!start)
+		return -EMSGSIZE;
+
+	rcu_read_lock();
+	ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data);
+	if (!ctx) {
+		err = 0;
+		goto nla_failure;
+	}
+	version = ctx->prot_info.version;
+	if (version) {
+		err = nla_put_u16(skb, TLS_INFO_VERSION, version);
+		if (err)
+			goto nla_failure;
+	}
+	cipher_type = ctx->prot_info.cipher_type;
+	if (cipher_type) {
+		err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type);
+		if (err)
+			goto nla_failure;
+	}
+	err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true));
+	if (err)
+		goto nla_failure;
+
+	err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false));
+	if (err)
+		goto nla_failure;
+
+	if (ctx->tx_conf == TLS_HW && ctx->zerocopy_sendfile) {
+		err = nla_put_flag(skb, TLS_INFO_ZC_RO_TX);
+		if (err)
+			goto nla_failure;
+	}
+	if (ctx->rx_no_pad) {
+		err = nla_put_flag(skb, TLS_INFO_RX_NO_PAD);
+		if (err)
+			goto nla_failure;
+	}
+
+	rcu_read_unlock();
+	nla_nest_end(skb, start);
+	return 0;
+
+nla_failure:
+	rcu_read_unlock();
+	nla_nest_cancel(skb, start);
+	return err;
+}
+
+static size_t tls_get_info_size(const struct sock *sk)
+{
+	size_t size = 0;
+
+	size += nla_total_size(0) +		/* INET_ULP_INFO_TLS */
+		nla_total_size(sizeof(u16)) +	/* TLS_INFO_VERSION */
+		nla_total_size(sizeof(u16)) +	/* TLS_INFO_CIPHER */
+		nla_total_size(sizeof(u16)) +	/* TLS_INFO_RXCONF */
+		nla_total_size(sizeof(u16)) +	/* TLS_INFO_TXCONF */
+		nla_total_size(0) +		/* TLS_INFO_ZC_RO_TX */
+		nla_total_size(0) +		/* TLS_INFO_RX_NO_PAD */
+		0;
+
+	return size;
+}
+
+static int __net_init tls_init_net(struct net *net)
+{
+	int err;
+
+	net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib);
+	if (!net->mib.tls_statistics)
+		return -ENOMEM;
+
+	err = tls_proc_init(net);
+	if (err)
+		goto err_free_stats;
+
+	return 0;
+err_free_stats:
+	free_percpu(net->mib.tls_statistics);
+	return err;
+}
+
+static void __net_exit tls_exit_net(struct net *net)
+{
+	tls_proc_fini(net);
+	free_percpu(net->mib.tls_statistics);
+}
+
+static struct pernet_operations tls_proc_ops = {
+	.init = tls_init_net,
+	.exit = tls_exit_net,
+};
+
+static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = {
+	.name			= "tls",
+	.owner			= THIS_MODULE,
+	.init			= tls_init,
+	.update			= tls_update,
+	.get_info		= tls_get_info,
+	.get_info_size		= tls_get_info_size,
+};
+
+static int __init tls_register(void)
+{
+	int err;
+
+	err = register_pernet_subsys(&tls_proc_ops);
+	if (err)
+		return err;
+
+	err = tls_strp_dev_init();
+	if (err)
+		goto err_pernet;
+
+	err = tls_device_init();
+	if (err)
+		goto err_strp;
+
+	tcp_register_ulp(&tcp_tls_ulp_ops);
+
+	return 0;
+err_strp:
+	tls_strp_dev_exit();
+err_pernet:
+	unregister_pernet_subsys(&tls_proc_ops);
+	return err;
+}
+
+static void __exit tls_unregister(void)
+{
+	tcp_unregister_ulp(&tcp_tls_ulp_ops);
+	tls_strp_dev_exit();
+	tls_device_cleanup();
+	unregister_pernet_subsys(&tls_proc_ops);
+}
+
+module_init(tls_register);
+module_exit(tls_unregister);