v4.19.13 snapshot.
diff --git a/include/net/tls.h b/include/net/tls.h
new file mode 100644
index 0000000..0a769cf
--- /dev/null
+++ b/include/net/tls.h
@@ -0,0 +1,455 @@
+/*
+ * 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 <net/tcp.h>
+#include <net/strparser.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 TLS_DEVICE_NAME_MAX 32
+
+/*
+ * This structure defines the routines for Inline TLS driver.
+ * The following routines are optional and filled with a
+ * null pointer if not defined.
+ *
+ * @name: Its the name of registered Inline tls device
+ * @dev_list: Inline tls device list
+ * int (*feature)(struct tls_device *device);
+ * Called to return Inline TLS driver capability
+ *
+ * int (*hash)(struct tls_device *device, struct sock *sk);
+ * This function sets Inline driver for listen and program
+ * device specific functioanlity as required
+ *
+ * void (*unhash)(struct tls_device *device, struct sock *sk);
+ * This function cleans listen state set by Inline TLS driver
+ */
+struct tls_device {
+ char name[TLS_DEVICE_NAME_MAX];
+ struct list_head dev_list;
+ int (*feature)(struct tls_device *device);
+ int (*hash)(struct tls_device *device, struct sock *sk);
+ void (*unhash)(struct tls_device *device, struct sock *sk);
+};
+
+enum {
+ TLS_BASE,
+ TLS_SW,
+#ifdef CONFIG_TLS_DEVICE
+ TLS_HW,
+#endif
+ TLS_HW_RECORD,
+ TLS_NUM_CONFIG,
+};
+
+struct tls_sw_context_tx {
+ struct crypto_aead *aead_send;
+ struct crypto_wait async_wait;
+
+ char aad_space[TLS_AAD_SPACE_SIZE];
+
+ unsigned int sg_plaintext_size;
+ int sg_plaintext_num_elem;
+ struct scatterlist sg_plaintext_data[MAX_SKB_FRAGS];
+
+ unsigned int sg_encrypted_size;
+ int sg_encrypted_num_elem;
+ struct scatterlist sg_encrypted_data[MAX_SKB_FRAGS];
+
+ /* AAD | sg_plaintext_data | sg_tag */
+ struct scatterlist sg_aead_in[2];
+ /* AAD | sg_encrypted_data (data contain overhead for hdr&iv&tag) */
+ struct scatterlist sg_aead_out[2];
+};
+
+struct tls_sw_context_rx {
+ struct crypto_aead *aead_recv;
+ struct crypto_wait async_wait;
+
+ struct strparser strp;
+ void (*saved_data_ready)(struct sock *sk);
+ unsigned int (*sk_poll)(struct file *file, struct socket *sock,
+ struct poll_table_struct *wait);
+ struct sk_buff *recv_pkt;
+ u8 control;
+ bool decrypted;
+};
+
+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[];
+ /* 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 (max_t(size_t, 8, sizeof(void *)))
+};
+
+#define TLS_OFFLOAD_CONTEXT_SIZE_TX \
+ (ALIGN(sizeof(struct tls_offload_context_tx), sizeof(void *)) + \
+ TLS_DRIVER_STATE_SIZE)
+
+enum {
+ TLS_PENDING_CLOSED_RECORD
+};
+
+struct cipher_context {
+ u16 prepend_size;
+ u16 tag_size;
+ u16 overhead_size;
+ u16 iv_size;
+ char *iv;
+ u16 rec_seq_size;
+ char *rec_seq;
+};
+
+union tls_crypto_context {
+ struct tls_crypto_info info;
+ struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
+};
+
+struct tls_context {
+ union tls_crypto_context crypto_send;
+ union tls_crypto_context crypto_recv;
+
+ struct list_head list;
+ struct net_device *netdev;
+ refcount_t refcount;
+
+ void *priv_ctx_tx;
+ void *priv_ctx_rx;
+
+ u8 tx_conf:3;
+ u8 rx_conf:3;
+
+ struct cipher_context tx;
+ struct cipher_context rx;
+
+ struct scatterlist *partially_sent_record;
+ u16 partially_sent_offset;
+ unsigned long flags;
+ bool in_tcp_sendpages;
+
+ u16 pending_open_record_frags;
+ int (*push_pending_record)(struct sock *sk, int flags);
+
+ void (*sk_write_space)(struct sock *sk);
+ void (*sk_destruct)(struct sock *sk);
+ void (*sk_proto_close)(struct sock *sk, long timeout);
+
+ int (*setsockopt)(struct sock *sk, int level,
+ int optname, char __user *optval,
+ unsigned int optlen);
+ int (*getsockopt)(struct sock *sk, int level,
+ int optname, char __user *optval,
+ int __user *optlen);
+ int (*hash)(struct sock *sk);
+ void (*unhash)(struct sock *sk);
+};
+
+struct tls_offload_context_rx {
+ /* sw must be the first member of tls_offload_context_rx */
+ struct tls_sw_context_rx sw;
+ atomic64_t resync_req;
+ u8 driver_state[];
+ /* 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_OFFLOAD_CONTEXT_SIZE_RX \
+ (ALIGN(sizeof(struct tls_offload_context_rx), sizeof(void *)) + \
+ TLS_DRIVER_STATE_SIZE)
+
+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);
+
+int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
+int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
+int tls_sw_sendpage(struct sock *sk, struct page *page,
+ int offset, size_t size, int flags);
+void tls_sw_close(struct sock *sk, long timeout);
+void tls_sw_free_resources_tx(struct sock *sk);
+void tls_sw_free_resources_rx(struct sock *sk);
+void tls_sw_release_resources_rx(struct sock *sk);
+int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
+ int nonblock, int flags, int *addr_len);
+unsigned int tls_sw_poll(struct file *file, struct socket *sock,
+ struct poll_table_struct *wait);
+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_set_device_offload(struct sock *sk, struct tls_context *ctx);
+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);
+void tls_device_sk_destruct(struct sock *sk);
+void tls_device_init(void);
+void tls_device_cleanup(void);
+
+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;
+}
+
+void tls_sk_destruct(struct sock *sk, struct tls_context *ctx);
+int tls_push_sg(struct sock *sk, struct tls_context *ctx,
+ struct scatterlist *sg, u16 first_offset,
+ int flags);
+int tls_push_pending_closed_record(struct sock *sk, struct tls_context *ctx,
+ int flags, long *timeo);
+
+static inline bool tls_is_pending_closed_record(struct tls_context *ctx)
+{
+ return test_bit(TLS_PENDING_CLOSED_RECORD, &ctx->flags);
+}
+
+static inline int tls_complete_pending_work(struct sock *sk,
+ struct tls_context *ctx,
+ int flags, long *timeo)
+{
+ int rc = 0;
+
+ if (unlikely(sk->sk_write_pending))
+ rc = wait_on_pending_writer(sk, timeo);
+
+ if (!rc && tls_is_pending_closed_record(ctx))
+ rc = tls_push_pending_closed_record(sk, ctx, flags, timeo);
+
+ return rc;
+}
+
+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;
+}
+
+struct sk_buff *
+tls_validate_xmit_skb(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 void tls_err_abort(struct sock *sk, int err)
+{
+ sk->sk_err = err;
+ sk->sk_error_report(sk);
+}
+
+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_advance_record_sn(struct sock *sk,
+ struct cipher_context *ctx)
+{
+ if (tls_bigint_increment(ctx->rec_seq, ctx->rec_seq_size))
+ tls_err_abort(sk, EBADMSG);
+ tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
+ ctx->iv_size);
+}
+
+static inline void tls_fill_prepend(struct tls_context *ctx,
+ char *buf,
+ size_t plaintext_len,
+ unsigned char record_type)
+{
+ size_t pkt_len, iv_size = ctx->tx.iv_size;
+
+ pkt_len = plaintext_len + iv_size + ctx->tx.tag_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] = record_type;
+ buf[1] = TLS_VERSION_MINOR(ctx->crypto_send.info.version);
+ buf[2] = TLS_VERSION_MAJOR(ctx->crypto_send.info.version);
+ /* we can use IV for nonce explicit according to spec */
+ buf[3] = pkt_len >> 8;
+ buf[4] = pkt_len & 0xFF;
+ memcpy(buf + TLS_NONCE_OFFSET,
+ ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size);
+}
+
+static inline void tls_make_aad(char *buf,
+ size_t size,
+ char *record_sequence,
+ int record_sequence_size,
+ unsigned char record_type)
+{
+ memcpy(buf, record_sequence, record_sequence_size);
+
+ buf[8] = record_type;
+ buf[9] = TLS_1_2_VERSION_MAJOR;
+ buf[10] = TLS_1_2_VERSION_MINOR;
+ buf[11] = size >> 8;
+ buf[12] = size & 0xFF;
+}
+
+static inline struct tls_context *tls_get_ctx(const struct sock *sk)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ return icsk->icsk_ulp_data;
+}
+
+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 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;
+}
+
+/* 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, ((((uint64_t)seq) << 32) | 1));
+}
+
+
+int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
+ unsigned char *record_type);
+void tls_register_device(struct tls_device *device);
+void tls_unregister_device(struct tls_device *device);
+int tls_device_decrypted(struct sock *sk, struct sk_buff *skb);
+int decrypt_skb(struct sock *sk, struct sk_buff *skb,
+ struct scatterlist *sgout);
+
+struct sk_buff *tls_validate_xmit_skb(struct sock *sk,
+ struct net_device *dev,
+ 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);
+
+int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
+
+void tls_device_offload_cleanup_rx(struct sock *sk);
+void handle_device_resync(struct sock *sk, u32 seq, u64 rcd_sn);
+
+#endif /* _TLS_OFFLOAD_H */