Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 758 insertions, 0 deletions

diff --git a/include/net/tls.h b/include/net/tls.h
new file mode 100644
index 000000000..d9cb597ca
--- /dev/null
+++ b/include/net/tls.h
@@ -0,0 +1,758 @@
+/*
+ * 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.
+ */
+
+#ifndef _TLS_OFFLOAD_H
+#define _TLS_OFFLOAD_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+#include <linux/crypto.h>
+#include <linux/socket.h>
+#include <linux/tcp.h>
+#include <linux/skmsg.h>
+#include <linux/mutex.h>
+#include <linux/netdevice.h>
+#include <linux/rcupdate.h>
+
+#include <net/net_namespace.h>
+#include <net/tcp.h>
+#include <net/strparser.h>
+#include <crypto/aead.h>
+#include <uapi/linux/tls.h>
+
+
+/* Maximum data size carried in a TLS record */
+#define TLS_MAX_PAYLOAD_SIZE		((size_t)1 << 14)
+
+#define TLS_HEADER_SIZE			5
+#define TLS_NONCE_OFFSET		TLS_HEADER_SIZE
+
+#define TLS_CRYPTO_INFO_READY(info)	((info)->cipher_type)
+
+#define TLS_RECORD_TYPE_DATA		0x17
+
+#define TLS_AAD_SPACE_SIZE		13
+
+#define MAX_IV_SIZE			16
+#define TLS_MAX_REC_SEQ_SIZE		8
+
+/* For AES-CCM, the full 16-bytes of IV is made of '4' fields of given sizes.
+ *
+ * IV[16] = b0[1] || implicit nonce[4] || explicit nonce[8] || length[3]
+ *
+ * The field 'length' is encoded in field 'b0' as '(length width - 1)'.
+ * Hence b0 contains (3 - 1) = 2.
+ */
+#define TLS_AES_CCM_IV_B0_BYTE		2
+
+#define __TLS_INC_STATS(net, field)				\
+	__SNMP_INC_STATS((net)->mib.tls_statistics, field)
+#define TLS_INC_STATS(net, field)				\
+	SNMP_INC_STATS((net)->mib.tls_statistics, field)
+#define __TLS_DEC_STATS(net, field)				\
+	__SNMP_DEC_STATS((net)->mib.tls_statistics, field)
+#define TLS_DEC_STATS(net, field)				\
+	SNMP_DEC_STATS((net)->mib.tls_statistics, field)
+
+enum {
+	TLS_BASE,
+	TLS_SW,
+	TLS_HW,
+	TLS_HW_RECORD,
+	TLS_NUM_CONFIG,
+};
+
+/* TLS records are maintained in 'struct tls_rec'. It stores the memory pages
+ * allocated or mapped for each TLS record. After encryption, the records are
+ * stores in a linked list.
+ */
+struct tls_rec {
+	struct list_head list;
+	int tx_ready;
+	int tx_flags;
+
+	struct sk_msg msg_plaintext;
+	struct sk_msg msg_encrypted;
+
+	/* AAD | msg_plaintext.sg.data | sg_tag */
+	struct scatterlist sg_aead_in[2];
+	/* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */
+	struct scatterlist sg_aead_out[2];
+
+	char content_type;
+	struct scatterlist sg_content_type;
+
+	char aad_space[TLS_AAD_SPACE_SIZE];
+	u8 iv_data[MAX_IV_SIZE];
+	struct aead_request aead_req;
+	u8 aead_req_ctx[];
+};
+
+struct tls_msg {
+	struct strp_msg rxm;
+	u8 control;
+};
+
+struct tx_work {
+	struct delayed_work work;
+	struct sock *sk;
+};
+
+struct tls_sw_context_tx {
+	struct crypto_aead *aead_send;
+	struct crypto_wait async_wait;
+	struct tx_work tx_work;
+	struct tls_rec *open_rec;
+	struct list_head tx_list;
+	atomic_t encrypt_pending;
+	/* protect crypto_wait with encrypt_pending */
+	spinlock_t encrypt_compl_lock;
+	int async_notify;
+	u8 async_capable:1;
+
+#define BIT_TX_SCHEDULED	0
+#define BIT_TX_CLOSING		1
+	unsigned long tx_bitmask;
+};
+
+struct tls_sw_context_rx {
+	struct crypto_aead *aead_recv;
+	struct crypto_wait async_wait;
+	struct strparser strp;
+	struct sk_buff_head rx_list;	/* list of decrypted 'data' records */
+	void (*saved_data_ready)(struct sock *sk);
+
+	struct sk_buff *recv_pkt;
+	u8 control;
+	u8 async_capable:1;
+	u8 decrypted:1;
+	atomic_t decrypt_pending;
+	/* protect crypto_wait with decrypt_pending*/
+	spinlock_t decrypt_compl_lock;
+	bool async_notify;
+};
+
+struct tls_record_info {
+	struct list_head list;
+	u32 end_seq;
+	int len;
+	int num_frags;
+	skb_frag_t frags[MAX_SKB_FRAGS];
+};
+
+struct tls_offload_context_tx {
+	struct crypto_aead *aead_send;
+	spinlock_t lock;	/* protects records list */
+	struct list_head records_list;
+	struct tls_record_info *open_record;
+	struct tls_record_info *retransmit_hint;
+	u64 hint_record_sn;
+	u64 unacked_record_sn;
+
+	struct scatterlist sg_tx_data[MAX_SKB_FRAGS];
+	void (*sk_destruct)(struct sock *sk);
+	u8 driver_state[] __aligned(8);
+	/* The TLS layer reserves room for driver specific state
+	 * Currently the belief is that there is not enough
+	 * driver specific state to justify another layer of indirection
+	 */
+#define TLS_DRIVER_STATE_SIZE_TX	16
+};
+
+#define TLS_OFFLOAD_CONTEXT_SIZE_TX                                            \
+	(sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX)
+
+enum tls_context_flags {
+	/* tls_device_down was called after the netdev went down, device state
+	 * was released, and kTLS works in software, even though rx_conf is
+	 * still TLS_HW (needed for transition).
+	 */
+	TLS_RX_DEV_DEGRADED = 0,
+	/* Unlike RX where resync is driven entirely by the core in TX only
+	 * the driver knows when things went out of sync, so we need the flag
+	 * to be atomic.
+	 */
+	TLS_TX_SYNC_SCHED = 1,
+	/* tls_dev_del was called for the RX side, device state was released,
+	 * but tls_ctx->netdev might still be kept, because TX-side driver
+	 * resources might not be released yet. Used to prevent the second
+	 * tls_dev_del call in tls_device_down if it happens simultaneously.
+	 */
+	TLS_RX_DEV_CLOSED = 2,
+};
+
+struct cipher_context {
+	char *iv;
+	char *rec_seq;
+};
+
+union tls_crypto_context {
+	struct tls_crypto_info info;
+	union {
+		struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
+		struct tls12_crypto_info_aes_gcm_256 aes_gcm_256;
+	};
+};
+
+struct tls_prot_info {
+	u16 version;
+	u16 cipher_type;
+	u16 prepend_size;
+	u16 tag_size;
+	u16 overhead_size;
+	u16 iv_size;
+	u16 salt_size;
+	u16 rec_seq_size;
+	u16 aad_size;
+	u16 tail_size;
+};
+
+struct tls_context {
+	/* read-only cache line */
+	struct tls_prot_info prot_info;
+
+	u8 tx_conf:3;
+	u8 rx_conf:3;
+
+	int (*push_pending_record)(struct sock *sk, int flags);
+	void (*sk_write_space)(struct sock *sk);
+
+	void *priv_ctx_tx;
+	void *priv_ctx_rx;
+
+	struct net_device *netdev;
+
+	/* rw cache line */
+	struct cipher_context tx;
+	struct cipher_context rx;
+
+	struct scatterlist *partially_sent_record;
+	u16 partially_sent_offset;
+
+	bool in_tcp_sendpages;
+	bool pending_open_record_frags;
+
+	struct mutex tx_lock; /* protects partially_sent_* fields and
+			       * per-type TX fields
+			       */
+	unsigned long flags;
+
+	/* cache cold stuff */
+	struct proto *sk_proto;
+	struct sock *sk;
+
+	void (*sk_destruct)(struct sock *sk);
+
+	union tls_crypto_context crypto_send;
+	union tls_crypto_context crypto_recv;
+
+	struct list_head list;
+	refcount_t refcount;
+	struct rcu_head rcu;
+};
+
+enum tls_offload_ctx_dir {
+	TLS_OFFLOAD_CTX_DIR_RX,
+	TLS_OFFLOAD_CTX_DIR_TX,
+};
+
+struct tlsdev_ops {
+	int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
+			   enum tls_offload_ctx_dir direction,
+			   struct tls_crypto_info *crypto_info,
+			   u32 start_offload_tcp_sn);
+	void (*tls_dev_del)(struct net_device *netdev,
+			    struct tls_context *ctx,
+			    enum tls_offload_ctx_dir direction);
+	int (*tls_dev_resync)(struct net_device *netdev,
+			      struct sock *sk, u32 seq, u8 *rcd_sn,
+			      enum tls_offload_ctx_dir direction);
+};
+
+enum tls_offload_sync_type {
+	TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0,
+	TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1,
+	TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC = 2,
+};
+
+#define TLS_DEVICE_RESYNC_NH_START_IVAL		2
+#define TLS_DEVICE_RESYNC_NH_MAX_IVAL		128
+
+#define TLS_DEVICE_RESYNC_ASYNC_LOGMAX		13
+struct tls_offload_resync_async {
+	atomic64_t req;
+	u16 loglen;
+	u16 rcd_delta;
+	u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX];
+};
+
+struct tls_offload_context_rx {
+	/* sw must be the first member of tls_offload_context_rx */
+	struct tls_sw_context_rx sw;
+	enum tls_offload_sync_type resync_type;
+	/* this member is set regardless of resync_type, to avoid branches */
+	u8 resync_nh_reset:1;
+	/* CORE_NEXT_HINT-only member, but use the hole here */
+	u8 resync_nh_do_now:1;
+	union {
+		/* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */
+		struct {
+			atomic64_t resync_req;
+		};
+		/* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */
+		struct {
+			u32 decrypted_failed;
+			u32 decrypted_tgt;
+		} resync_nh;
+		/* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC */
+		struct {
+			struct tls_offload_resync_async *resync_async;
+		};
+	};
+	u8 driver_state[] __aligned(8);
+	/* The TLS layer reserves room for driver specific state
+	 * Currently the belief is that there is not enough
+	 * driver specific state to justify another layer of indirection
+	 */
+#define TLS_DRIVER_STATE_SIZE_RX	8
+};
+
+#define TLS_OFFLOAD_CONTEXT_SIZE_RX					\
+	(sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX)
+
+struct tls_context *tls_ctx_create(struct sock *sk);
+void tls_ctx_free(struct sock *sk, struct tls_context *ctx);
+void update_sk_prot(struct sock *sk, struct tls_context *ctx);
+
+int wait_on_pending_writer(struct sock *sk, long *timeo);
+int tls_sk_query(struct sock *sk, int optname, char __user *optval,
+		int __user *optlen);
+int tls_sk_attach(struct sock *sk, int optname, char __user *optval,
+		  unsigned int optlen);
+void tls_err_abort(struct sock *sk, int err);
+
+int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
+void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
+void tls_sw_strparser_done(struct tls_context *tls_ctx);
+int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
+int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
+			   int offset, size_t size, int flags);
+int tls_sw_sendpage(struct sock *sk, struct page *page,
+		    int offset, size_t size, int flags);
+void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);
+void tls_sw_release_resources_tx(struct sock *sk);
+void tls_sw_free_ctx_tx(struct tls_context *tls_ctx);
+void tls_sw_free_resources_rx(struct sock *sk);
+void tls_sw_release_resources_rx(struct sock *sk);
+void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
+int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
+		   int nonblock, int flags, int *addr_len);
+bool tls_sw_stream_read(const struct sock *sk);
+ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
+			   struct pipe_inode_info *pipe,
+			   size_t len, unsigned int flags);
+
+int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
+int tls_device_sendpage(struct sock *sk, struct page *page,
+			int offset, size_t size, int flags);
+int tls_tx_records(struct sock *sk, int flags);
+
+struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context,
+				       u32 seq, u64 *p_record_sn);
+
+static inline bool tls_record_is_start_marker(struct tls_record_info *rec)
+{
+	return rec->len == 0;
+}
+
+static inline u32 tls_record_start_seq(struct tls_record_info *rec)
+{
+	return rec->end_seq - rec->len;
+}
+
+int tls_push_sg(struct sock *sk, struct tls_context *ctx,
+		struct scatterlist *sg, u16 first_offset,
+		int flags);
+int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
+			    int flags);
+void tls_free_partial_record(struct sock *sk, struct tls_context *ctx);
+
+static inline struct tls_msg *tls_msg(struct sk_buff *skb)
+{
+	return (struct tls_msg *)strp_msg(skb);
+}
+
+static inline bool tls_is_partially_sent_record(struct tls_context *ctx)
+{
+	return !!ctx->partially_sent_record;
+}
+
+static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)
+{
+	return tls_ctx->pending_open_record_frags;
+}
+
+static inline bool is_tx_ready(struct tls_sw_context_tx *ctx)
+{
+	struct tls_rec *rec;
+
+	rec = list_first_entry(&ctx->tx_list, struct tls_rec, list);
+	if (!rec)
+		return false;
+
+	return READ_ONCE(rec->tx_ready);
+}
+
+static inline 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;
+}
+
+struct sk_buff *
+tls_validate_xmit_skb(struct sock *sk, struct net_device *dev,
+		      struct sk_buff *skb);
+struct sk_buff *
+tls_validate_xmit_skb_sw(struct sock *sk, struct net_device *dev,
+			 struct sk_buff *skb);
+
+static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk)
+{
+#ifdef CONFIG_SOCK_VALIDATE_XMIT
+	return sk_fullsock(sk) &&
+	       (smp_load_acquire(&sk->sk_validate_xmit_skb) ==
+	       &tls_validate_xmit_skb);
+#else
+	return false;
+#endif
+}
+
+static inline bool tls_bigint_increment(unsigned char *seq, int len)
+{
+	int i;
+
+	for (i = len - 1; i >= 0; i--) {
+		++seq[i];
+		if (seq[i] != 0)
+			break;
+	}
+
+	return (i == -1);
+}
+
+static inline void tls_bigint_subtract(unsigned char *seq, int  n)
+{
+	u64 rcd_sn;
+	__be64 *p;
+
+	BUILD_BUG_ON(TLS_MAX_REC_SEQ_SIZE != 8);
+
+	p = (__be64 *)seq;
+	rcd_sn = be64_to_cpu(*p);
+	*p = cpu_to_be64(rcd_sn - n);
+}
+
+static inline struct tls_context *tls_get_ctx(const struct sock *sk)
+{
+	struct inet_connection_sock *icsk = inet_csk(sk);
+
+	/* Use RCU on icsk_ulp_data only for sock diag code,
+	 * TLS data path doesn't need rcu_dereference().
+	 */
+	return (__force void *)icsk->icsk_ulp_data;
+}
+
+static inline void tls_advance_record_sn(struct sock *sk,
+					 struct tls_prot_info *prot,
+					 struct cipher_context *ctx)
+{
+	if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
+		tls_err_abort(sk, -EBADMSG);
+
+	if (prot->version != TLS_1_3_VERSION)
+		tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
+				     prot->iv_size);
+}
+
+static inline void tls_fill_prepend(struct tls_context *ctx,
+			     char *buf,
+			     size_t plaintext_len,
+			     unsigned char record_type,
+			     int version)
+{
+	struct tls_prot_info *prot = &ctx->prot_info;
+	size_t pkt_len, iv_size = prot->iv_size;
+
+	pkt_len = plaintext_len + prot->tag_size;
+	if (version != TLS_1_3_VERSION) {
+		pkt_len += iv_size;
+
+		memcpy(buf + TLS_NONCE_OFFSET,
+		       ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size);
+	}
+
+	/* we cover nonce explicit here as well, so buf should be of
+	 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE
+	 */
+	buf[0] = version == TLS_1_3_VERSION ?
+		   TLS_RECORD_TYPE_DATA : record_type;
+	/* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */
+	buf[1] = TLS_1_2_VERSION_MINOR;
+	buf[2] = TLS_1_2_VERSION_MAJOR;
+	/* we can use IV for nonce explicit according to spec */
+	buf[3] = pkt_len >> 8;
+	buf[4] = pkt_len & 0xFF;
+}
+
+static inline void tls_make_aad(char *buf,
+				size_t size,
+				char *record_sequence,
+				int record_sequence_size,
+				unsigned char record_type,
+				int version)
+{
+	if (version != TLS_1_3_VERSION) {
+		memcpy(buf, record_sequence, record_sequence_size);
+		buf += 8;
+	} else {
+		size += TLS_CIPHER_AES_GCM_128_TAG_SIZE;
+	}
+
+	buf[0] = version == TLS_1_3_VERSION ?
+		  TLS_RECORD_TYPE_DATA : record_type;
+	buf[1] = TLS_1_2_VERSION_MAJOR;
+	buf[2] = TLS_1_2_VERSION_MINOR;
+	buf[3] = size >> 8;
+	buf[4] = size & 0xFF;
+}
+
+static inline void xor_iv_with_seq(int version, char *iv, char *seq)
+{
+	int i;
+
+	if (version == TLS_1_3_VERSION) {
+		for (i = 0; i < 8; i++)
+			iv[i + 4] ^= seq[i];
+	}
+}
+
+
+static inline struct tls_sw_context_rx *tls_sw_ctx_rx(
+		const struct tls_context *tls_ctx)
+{
+	return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx;
+}
+
+static inline struct tls_sw_context_tx *tls_sw_ctx_tx(
+		const struct tls_context *tls_ctx)
+{
+	return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx;
+}
+
+static inline struct tls_offload_context_tx *
+tls_offload_ctx_tx(const struct tls_context *tls_ctx)
+{
+	return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx;
+}
+
+static inline bool tls_sw_has_ctx_tx(const struct sock *sk)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+
+	if (!ctx)
+		return false;
+	return !!tls_sw_ctx_tx(ctx);
+}
+
+static inline bool tls_sw_has_ctx_rx(const struct sock *sk)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+
+	if (!ctx)
+		return false;
+	return !!tls_sw_ctx_rx(ctx);
+}
+
+void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
+void tls_device_write_space(struct sock *sk, struct tls_context *ctx);
+
+static inline struct tls_offload_context_rx *
+tls_offload_ctx_rx(const struct tls_context *tls_ctx)
+{
+	return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx;
+}
+
+#if IS_ENABLED(CONFIG_TLS_DEVICE)
+static inline void *__tls_driver_ctx(struct tls_context *tls_ctx,
+				     enum tls_offload_ctx_dir direction)
+{
+	if (direction == TLS_OFFLOAD_CTX_DIR_TX)
+		return tls_offload_ctx_tx(tls_ctx)->driver_state;
+	else
+		return tls_offload_ctx_rx(tls_ctx)->driver_state;
+}
+
+static inline void *
+tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction)
+{
+	return __tls_driver_ctx(tls_get_ctx(sk), direction);
+}
+#endif
+
+#define RESYNC_REQ BIT(0)
+#define RESYNC_REQ_ASYNC BIT(1)
+/* The TLS context is valid until sk_destruct is called */
+static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
+{
+	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
+
+	atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | RESYNC_REQ);
+}
+
+/* Log all TLS record header TCP sequences in [seq, seq+len] */
+static inline void
+tls_offload_rx_resync_async_request_start(struct sock *sk, __be32 seq, u16 len)
+{
+	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
+
+	atomic64_set(&rx_ctx->resync_async->req, ((u64)ntohl(seq) << 32) |
+		     ((u64)len << 16) | RESYNC_REQ | RESYNC_REQ_ASYNC);
+	rx_ctx->resync_async->loglen = 0;
+	rx_ctx->resync_async->rcd_delta = 0;
+}
+
+static inline void
+tls_offload_rx_resync_async_request_end(struct sock *sk, __be32 seq)
+{
+	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
+
+	atomic64_set(&rx_ctx->resync_async->req,
+		     ((u64)ntohl(seq) << 32) | RESYNC_REQ);
+}
+
+static inline void
+tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type)
+{
+	struct tls_context *tls_ctx = tls_get_ctx(sk);
+
+	tls_offload_ctx_rx(tls_ctx)->resync_type = type;
+}
+
+/* Driver's seq tracking has to be disabled until resync succeeded */
+static inline bool tls_offload_tx_resync_pending(struct sock *sk)
+{
+	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	bool ret;
+
+	ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags);
+	smp_mb__after_atomic();
+	return ret;
+}
+
+int __net_init tls_proc_init(struct net *net);
+void __net_exit tls_proc_fini(struct net *net);
+
+int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
+		      unsigned char *record_type);
+int decrypt_skb(struct sock *sk, struct sk_buff *skb,
+		struct scatterlist *sgout);
+struct sk_buff *tls_encrypt_skb(struct sk_buff *skb);
+
+int tls_sw_fallback_init(struct sock *sk,
+			 struct tls_offload_context_tx *offload_ctx,
+			 struct tls_crypto_info *crypto_info);
+
+#ifdef CONFIG_TLS_DEVICE
+int tls_device_init(void);
+void tls_device_cleanup(void);
+void tls_device_sk_destruct(struct sock *sk);
+int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
+void tls_device_free_resources_tx(struct sock *sk);
+int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
+void tls_device_offload_cleanup_rx(struct sock *sk);
+void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
+void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq);
+int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
+			 struct sk_buff *skb, struct strp_msg *rxm);
+
+static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk)
+{
+	if (!sk_fullsock(sk) ||
+	    smp_load_acquire(&sk->sk_destruct) != tls_device_sk_destruct)
+		return false;
+	return tls_get_ctx(sk)->rx_conf == TLS_HW;
+}
+#else
+static inline int tls_device_init(void) { return 0; }
+static inline void tls_device_cleanup(void) {}
+
+static inline int
+tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void tls_device_free_resources_tx(struct sock *sk) {}
+
+static inline int
+tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void tls_device_offload_cleanup_rx(struct sock *sk) {}
+static inline void
+tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {}
+
+static inline int
+tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
+		     struct sk_buff *skb, struct strp_msg *rxm)
+{
+	return 0;
+}
+#endif
+#endif /* _TLS_OFFLOAD_H */