crypto: chtls - structure and macro for Inline TLS

Define Inline TLS state, connection management info.
Supporting macros definition.

Signed-off-by: Atul Gupta <atul.gupta@chelsio.com>
Reviewed-by: Michael Werner <werner@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 685 insertions, 0 deletions

diff --git a/drivers/crypto/chelsio/chtls/chtls.h b/drivers/crypto/chelsio/chtls/chtls.h
new file mode 100644
index 000000000000..f4b8f1ec0061
--- /dev/null
+++ b/drivers/crypto/chelsio/chtls/chtls.h
@@ -0,0 +1,482 @@
+/*
+ * Copyright (c) 2018 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __CHTLS_H__
+#define __CHTLS_H__
+
+#include <crypto/aes.h>
+#include <crypto/algapi.h>
+#include <crypto/hash.h>
+#include <crypto/sha.h>
+#include <crypto/authenc.h>
+#include <crypto/ctr.h>
+#include <crypto/gf128mul.h>
+#include <crypto/internal/aead.h>
+#include <crypto/null.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/aead.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/internal/hash.h>
+#include <linux/tls.h>
+#include <net/tls.h>
+
+#include "t4fw_api.h"
+#include "t4_msg.h"
+#include "cxgb4.h"
+#include "cxgb4_uld.h"
+#include "l2t.h"
+#include "chcr_algo.h"
+#include "chcr_core.h"
+#include "chcr_crypto.h"
+
+#define MAX_IVS_PAGE			256
+#define TLS_KEY_CONTEXT_SZ		64
+#define CIPHER_BLOCK_SIZE		16
+#define GCM_TAG_SIZE			16
+#define KEY_ON_MEM_SZ			16
+#define AEAD_EXPLICIT_DATA_SIZE		8
+#define TLS_HEADER_LENGTH		5
+#define SCMD_CIPH_MODE_AES_GCM		2
+/* Any MFS size should work and come from openssl */
+#define TLS_MFS				16384
+
+#define RSS_HDR sizeof(struct rss_header)
+#define TLS_WR_CPL_LEN \
+	(sizeof(struct fw_tlstx_data_wr) + sizeof(struct cpl_tx_tls_sfo))
+
+enum {
+	CHTLS_KEY_CONTEXT_DSGL,
+	CHTLS_KEY_CONTEXT_IMM,
+	CHTLS_KEY_CONTEXT_DDR,
+};
+
+enum {
+	CHTLS_LISTEN_START,
+	CHTLS_LISTEN_STOP,
+};
+
+/* Flags for return value of CPL message handlers */
+enum {
+	CPL_RET_BUF_DONE =    1,   /* buffer processing done */
+	CPL_RET_BAD_MSG =     2,   /* bad CPL message */
+	CPL_RET_UNKNOWN_TID = 4    /* unexpected unknown TID */
+};
+
+#define TLS_RCV_ST_READ_HEADER		0xF0
+#define TLS_RCV_ST_READ_BODY		0xF1
+#define TLS_RCV_ST_READ_DONE		0xF2
+#define TLS_RCV_ST_READ_NB		0xF3
+
+#define LISTEN_INFO_HASH_SIZE 32
+#define RSPQ_HASH_BITS 5
+struct listen_info {
+	struct listen_info *next;  /* Link to next entry */
+	struct sock *sk;           /* The listening socket */
+	unsigned int stid;         /* The server TID */
+};
+
+enum {
+	T4_LISTEN_START_PENDING,
+	T4_LISTEN_STARTED
+};
+
+enum csk_flags {
+	CSK_CALLBACKS_CHKD,	/* socket callbacks have been sanitized */
+	CSK_ABORT_REQ_RCVD,	/* received one ABORT_REQ_RSS message */
+	CSK_TX_MORE_DATA,	/* sending ULP data; don't set SHOVE bit */
+	CSK_TX_WAIT_IDLE,	/* suspend Tx until in-flight data is ACKed */
+	CSK_ABORT_SHUTDOWN,	/* shouldn't send more abort requests */
+	CSK_ABORT_RPL_PENDING,	/* expecting an abort reply */
+	CSK_CLOSE_CON_REQUESTED,/* we've sent a close_conn_req */
+	CSK_TX_DATA_SENT,	/* sent a TX_DATA WR on this connection */
+	CSK_TX_FAILOVER,	/* Tx traffic failing over */
+	CSK_UPDATE_RCV_WND,	/* Need to update rcv window */
+	CSK_RST_ABORTED,	/* outgoing RST was aborted */
+	CSK_TLS_HANDSHK,	/* TLS Handshake */
+	CSK_CONN_INLINE,	/* Connection on HW */
+};
+
+struct listen_ctx {
+	struct sock *lsk;
+	struct chtls_dev *cdev;
+	struct sk_buff_head synq;
+	u32 state;
+};
+
+struct key_map {
+	unsigned long *addr;
+	unsigned int start;
+	unsigned int available;
+	unsigned int size;
+	spinlock_t lock; /* lock for key id request from map */
+} __packed;
+
+struct tls_scmd {
+	u32 seqno_numivs;
+	u32 ivgen_hdrlen;
+};
+
+struct chtls_dev {
+	struct tls_device tlsdev;
+	struct list_head list;
+	struct cxgb4_lld_info *lldi;
+	struct pci_dev *pdev;
+	struct listen_info *listen_hash_tab[LISTEN_INFO_HASH_SIZE];
+	spinlock_t listen_lock; /* lock for listen list */
+	struct net_device **ports;
+	struct tid_info *tids;
+	unsigned int pfvf;
+	const unsigned short *mtus;
+
+	struct idr hwtid_idr;
+	struct idr stid_idr;
+
+	spinlock_t idr_lock ____cacheline_aligned_in_smp;
+
+	struct net_device *egr_dev[NCHAN * 2];
+	struct sk_buff *rspq_skb_cache[1 << RSPQ_HASH_BITS];
+	struct sk_buff *askb;
+
+	struct sk_buff_head deferq;
+	struct work_struct deferq_task;
+
+	struct list_head list_node;
+	struct list_head rcu_node;
+	struct list_head na_node;
+	unsigned int send_page_order;
+	struct key_map kmap;
+};
+
+struct chtls_hws {
+	struct sk_buff_head sk_recv_queue;
+	u8 txqid;
+	u8 ofld;
+	u16 type;
+	u16 rstate;
+	u16 keyrpl;
+	u16 pldlen;
+	u16 rcvpld;
+	u16 compute;
+	u16 expansion;
+	u16 keylen;
+	u16 pdus;
+	u16 adjustlen;
+	u16 ivsize;
+	u16 txleft;
+	u32 mfs;
+	s32 txkey;
+	s32 rxkey;
+	u32 fcplenmax;
+	u32 copied_seq;
+	u64 tx_seq_no;
+	struct tls_scmd scmd;
+	struct tls12_crypto_info_aes_gcm_128 crypto_info;
+};
+
+struct chtls_sock {
+	struct sock *sk;
+	struct chtls_dev *cdev;
+	struct l2t_entry *l2t_entry;    /* pointer to the L2T entry */
+	struct net_device *egress_dev;  /* TX_CHAN for act open retry */
+
+	struct sk_buff_head txq;
+	struct sk_buff *wr_skb_head;
+	struct sk_buff *wr_skb_tail;
+	struct sk_buff *ctrl_skb_cache;
+	struct sk_buff *txdata_skb_cache; /* abort path messages */
+	struct kref kref;
+	unsigned long flags;
+	u32 opt2;
+	u32 wr_credits;
+	u32 wr_unacked;
+	u32 wr_max_credits;
+	u32 wr_nondata;
+	u32 hwtid;               /* TCP Control Block ID */
+	u32 txq_idx;
+	u32 rss_qid;
+	u32 tid;
+	u32 idr;
+	u32 mss;
+	u32 ulp_mode;
+	u32 tx_chan;
+	u32 rx_chan;
+	u32 sndbuf;
+	u32 txplen_max;
+	u32 mtu_idx;           /* MTU table index */
+	u32 smac_idx;
+	u8 port_id;
+	u8 tos;
+	u16 resv2;
+	u32 delack_mode;
+	u32 delack_seq;
+
+	void *passive_reap_next;        /* placeholder for passive */
+	struct chtls_hws tlshws;
+	struct synq {
+		struct sk_buff *next;
+		struct sk_buff *prev;
+	} synq;
+	struct listen_ctx *listen_ctx;
+};
+
+struct tls_hdr {
+	u8  type;
+	u16 version;
+	u16 length;
+} __packed;
+
+struct tlsrx_cmp_hdr {
+	u8  type;
+	u16 version;
+	u16 length;
+
+	u64 tls_seq;
+	u16 reserved1;
+	u8  res_to_mac_error;
+} __packed;
+
+/* res_to_mac_error fields */
+#define TLSRX_HDR_PKT_INT_ERROR_S   4
+#define TLSRX_HDR_PKT_INT_ERROR_M   0x1
+#define TLSRX_HDR_PKT_INT_ERROR_V(x) \
+	((x) << TLSRX_HDR_PKT_INT_ERROR_S)
+#define TLSRX_HDR_PKT_INT_ERROR_G(x) \
+	(((x) >> TLSRX_HDR_PKT_INT_ERROR_S) & TLSRX_HDR_PKT_INT_ERROR_M)
+#define TLSRX_HDR_PKT_INT_ERROR_F   TLSRX_HDR_PKT_INT_ERROR_V(1U)
+
+#define TLSRX_HDR_PKT_SPP_ERROR_S        3
+#define TLSRX_HDR_PKT_SPP_ERROR_M        0x1
+#define TLSRX_HDR_PKT_SPP_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_SPP_ERROR)
+#define TLSRX_HDR_PKT_SPP_ERROR_G(x)     \
+	(((x) >> TLSRX_HDR_PKT_SPP_ERROR_S) & TLSRX_HDR_PKT_SPP_ERROR_M)
+#define TLSRX_HDR_PKT_SPP_ERROR_F        TLSRX_HDR_PKT_SPP_ERROR_V(1U)
+
+#define TLSRX_HDR_PKT_CCDX_ERROR_S       2
+#define TLSRX_HDR_PKT_CCDX_ERROR_M       0x1
+#define TLSRX_HDR_PKT_CCDX_ERROR_V(x)    ((x) << TLSRX_HDR_PKT_CCDX_ERROR_S)
+#define TLSRX_HDR_PKT_CCDX_ERROR_G(x)    \
+	(((x) >> TLSRX_HDR_PKT_CCDX_ERROR_S) & TLSRX_HDR_PKT_CCDX_ERROR_M)
+#define TLSRX_HDR_PKT_CCDX_ERROR_F       TLSRX_HDR_PKT_CCDX_ERROR_V(1U)
+
+#define TLSRX_HDR_PKT_PAD_ERROR_S        1
+#define TLSRX_HDR_PKT_PAD_ERROR_M        0x1
+#define TLSRX_HDR_PKT_PAD_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_PAD_ERROR_S)
+#define TLSRX_HDR_PKT_PAD_ERROR_G(x)     \
+	(((x) >> TLSRX_HDR_PKT_PAD_ERROR_S) & TLSRX_HDR_PKT_PAD_ERROR_M)
+#define TLSRX_HDR_PKT_PAD_ERROR_F        TLSRX_HDR_PKT_PAD_ERROR_V(1U)
+
+#define TLSRX_HDR_PKT_MAC_ERROR_S        0
+#define TLSRX_HDR_PKT_MAC_ERROR_M        0x1
+#define TLSRX_HDR_PKT_MAC_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_MAC_ERROR)
+#define TLSRX_HDR_PKT_MAC_ERROR_G(x)     \
+	(((x) >> S_TLSRX_HDR_PKT_MAC_ERROR_S) & TLSRX_HDR_PKT_MAC_ERROR_M)
+#define TLSRX_HDR_PKT_MAC_ERROR_F        TLSRX_HDR_PKT_MAC_ERROR_V(1U)
+
+#define TLSRX_HDR_PKT_ERROR_M           0x1F
+
+struct ulp_mem_rw {
+	__be32 cmd;
+	__be32 len16;             /* command length */
+	__be32 dlen;              /* data length in 32-byte units */
+	__be32 lock_addr;
+};
+
+struct tls_key_wr {
+	__be32 op_to_compl;
+	__be32 flowid_len16;
+	__be32 ftid;
+	u8   reneg_to_write_rx;
+	u8   protocol;
+	__be16 mfs;
+};
+
+struct tls_key_req {
+	struct tls_key_wr wr;
+	struct ulp_mem_rw req;
+	struct ulptx_idata sc_imm;
+};
+
+/*
+ * This lives in skb->cb and is used to chain WRs in a linked list.
+ */
+struct wr_skb_cb {
+	struct l2t_skb_cb l2t;          /* reserve space for l2t CB */
+	struct sk_buff *next_wr;        /* next write request */
+};
+
+/* Per-skb backlog handler.  Run when a socket's backlog is processed. */
+struct blog_skb_cb {
+	void (*backlog_rcv)(struct sock *sk, struct sk_buff *skb);
+	struct chtls_dev *cdev;
+};
+
+/*
+ * Similar to tcp_skb_cb but with ULP elements added to support TLS,
+ * etc.
+ */
+struct ulp_skb_cb {
+	struct wr_skb_cb wr;		/* reserve space for write request */
+	u16 flags;			/* TCP-like flags */
+	u8 psh;
+	u8 ulp_mode;			/* ULP mode/submode of sk_buff */
+	u32 seq;			/* TCP sequence number */
+	union { /* ULP-specific fields */
+		struct {
+			u8  type;
+			u8  ofld;
+			u8  iv;
+		} tls;
+	} ulp;
+};
+
+#define ULP_SKB_CB(skb) ((struct ulp_skb_cb *)&((skb)->cb[0]))
+#define BLOG_SKB_CB(skb) ((struct blog_skb_cb *)(skb)->cb)
+
+/*
+ * Flags for ulp_skb_cb.flags.
+ */
+enum {
+	ULPCB_FLAG_NEED_HDR  = 1 << 0,	/* packet needs a TX_DATA_WR header */
+	ULPCB_FLAG_NO_APPEND = 1 << 1,	/* don't grow this skb */
+	ULPCB_FLAG_BARRIER   = 1 << 2,	/* set TX_WAIT_IDLE after sending */
+	ULPCB_FLAG_HOLD      = 1 << 3,	/* skb not ready for Tx yet */
+	ULPCB_FLAG_COMPL     = 1 << 4,	/* request WR completion */
+	ULPCB_FLAG_URG       = 1 << 5,	/* urgent data */
+	ULPCB_FLAG_TLS_ND    = 1 << 6, /* payload of zero length */
+	ULPCB_FLAG_NO_HDR    = 1 << 7, /* not a ofld wr */
+};
+
+/* The ULP mode/submode of an skbuff */
+#define skb_ulp_mode(skb)  (ULP_SKB_CB(skb)->ulp_mode)
+#define TCP_PAGE(sk)   (sk->sk_frag.page)
+#define TCP_OFF(sk)    (sk->sk_frag.offset)
+
+static inline struct chtls_dev *to_chtls_dev(struct tls_device *tlsdev)
+{
+	return container_of(tlsdev, struct chtls_dev, tlsdev);
+}
+
+static inline void csk_set_flag(struct chtls_sock *csk,
+				enum csk_flags flag)
+{
+	__set_bit(flag, &csk->flags);
+}
+
+static inline void csk_reset_flag(struct chtls_sock *csk,
+				  enum csk_flags flag)
+{
+	__clear_bit(flag, &csk->flags);
+}
+
+static inline bool csk_conn_inline(const struct chtls_sock *csk)
+{
+	return test_bit(CSK_CONN_INLINE, &csk->flags);
+}
+
+static inline int csk_flag(const struct sock *sk, enum csk_flags flag)
+{
+	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
+
+	if (!csk_conn_inline(csk))
+		return 0;
+	return test_bit(flag, &csk->flags);
+}
+
+static inline int csk_flag_nochk(const struct chtls_sock *csk,
+				 enum csk_flags flag)
+{
+	return test_bit(flag, &csk->flags);
+}
+
+static inline void *cplhdr(struct sk_buff *skb)
+{
+	return skb->data;
+}
+
+static inline int is_neg_adv(unsigned int status)
+{
+	return status == CPL_ERR_RTX_NEG_ADVICE ||
+	       status == CPL_ERR_KEEPALV_NEG_ADVICE ||
+	       status == CPL_ERR_PERSIST_NEG_ADVICE;
+}
+
+static inline void process_cpl_msg(void (*fn)(struct sock *, struct sk_buff *),
+				   struct sock *sk,
+				   struct sk_buff *skb)
+{
+	skb_reset_mac_header(skb);
+	skb_reset_network_header(skb);
+	skb_reset_transport_header(skb);
+
+	bh_lock_sock(sk);
+	if (unlikely(sock_owned_by_user(sk))) {
+		BLOG_SKB_CB(skb)->backlog_rcv = fn;
+		__sk_add_backlog(sk, skb);
+	} else {
+		fn(sk, skb);
+	}
+	bh_unlock_sock(sk);
+}
+
+static inline void chtls_sock_free(struct kref *ref)
+{
+	struct chtls_sock *csk = container_of(ref, struct chtls_sock,
+					      kref);
+	kfree(csk);
+}
+
+static inline void __chtls_sock_put(const char *fn, struct chtls_sock *csk)
+{
+	kref_put(&csk->kref, chtls_sock_free);
+}
+
+static inline void __chtls_sock_get(const char *fn,
+				    struct chtls_sock *csk)
+{
+	kref_get(&csk->kref);
+}
+
+static inline void send_or_defer(struct sock *sk, struct tcp_sock *tp,
+				 struct sk_buff *skb, int through_l2t)
+{
+	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
+
+	if (through_l2t) {
+		/* send through L2T */
+		cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
+	} else {
+		/* send directly */
+		cxgb4_ofld_send(csk->egress_dev, skb);
+	}
+}
+
+typedef int (*chtls_handler_func)(struct chtls_dev *, struct sk_buff *);
+extern chtls_handler_func chtls_handlers[NUM_CPL_CMDS];
+void chtls_install_cpl_ops(struct sock *sk);
+int chtls_init_kmap(struct chtls_dev *cdev, struct cxgb4_lld_info *lldi);
+void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk);
+int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk);
+void chtls_close(struct sock *sk, long timeout);
+int chtls_disconnect(struct sock *sk, int flags);
+void chtls_shutdown(struct sock *sk, int how);
+void chtls_destroy_sock(struct sock *sk);
+int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
+int chtls_recvmsg(struct sock *sk, struct msghdr *msg,
+		  size_t len, int nonblock, int flags, int *addr_len);
+int chtls_sendpage(struct sock *sk, struct page *page,
+		   int offset, size_t size, int flags);
+int send_tx_flowc_wr(struct sock *sk, int compl,
+		     u32 snd_nxt, u32 rcv_nxt);
+void chtls_tcp_push(struct sock *sk, int flags);
+int chtls_push_frames(struct chtls_sock *csk, int comp);
+int chtls_set_tcb_tflag(struct sock *sk, unsigned int bit_pos, int val);
+int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 mode);
+void skb_entail(struct sock *sk, struct sk_buff *skb, int flags);
+unsigned int keyid_to_addr(int start_addr, int keyid);
+void free_tls_keyid(struct sock *sk);
+#endif
diff --git a/drivers/crypto/chelsio/chtls/chtls_cm.h b/drivers/crypto/chelsio/chtls/chtls_cm.h
new file mode 100644
index 000000000000..78eb3afa3a80
--- /dev/null
+++ b/drivers/crypto/chelsio/chtls/chtls_cm.h
@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 2018 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __CHTLS_CM_H__
+#define __CHTLS_CM_H__
+
+/*
+ * TCB settings
+ */
+/* 3:0 */
+#define TCB_ULP_TYPE_W    0
+#define TCB_ULP_TYPE_S    0
+#define TCB_ULP_TYPE_M    0xfULL
+#define TCB_ULP_TYPE_V(x) ((x) << TCB_ULP_TYPE_S)
+
+/* 11:4 */
+#define TCB_ULP_RAW_W    0
+#define TCB_ULP_RAW_S    4
+#define TCB_ULP_RAW_M    0xffULL
+#define TCB_ULP_RAW_V(x) ((x) << TCB_ULP_RAW_S)
+
+#define TF_TLS_KEY_SIZE_S    7
+#define TF_TLS_KEY_SIZE_V(x) ((x) << TF_TLS_KEY_SIZE_S)
+
+#define TF_TLS_CONTROL_S     2
+#define TF_TLS_CONTROL_V(x) ((x) << TF_TLS_CONTROL_S)
+
+#define TF_TLS_ACTIVE_S      1
+#define TF_TLS_ACTIVE_V(x) ((x) << TF_TLS_ACTIVE_S)
+
+#define TF_TLS_ENABLE_S      0
+#define TF_TLS_ENABLE_V(x) ((x) << TF_TLS_ENABLE_S)
+
+#define TF_RX_QUIESCE_S    15
+#define TF_RX_QUIESCE_V(x) ((x) << TF_RX_QUIESCE_S)
+
+/*
+ * Max receive window supported by HW in bytes.  Only a small part of it can
+ * be set through option0, the rest needs to be set through RX_DATA_ACK.
+ */
+#define MAX_RCV_WND ((1U << 27) - 1)
+#define MAX_MSS     65536
+
+/*
+ * Min receive window.  We want it to be large enough to accommodate receive
+ * coalescing, handle jumbo frames, and not trigger sender SWS avoidance.
+ */
+#define MIN_RCV_WND (24 * 1024U)
+#define LOOPBACK(x)     (((x) & htonl(0xff000000)) == htonl(0x7f000000))
+
+/* ulp_mem_io + ulptx_idata + payload + padding */
+#define MAX_IMM_ULPTX_WR_LEN (32 + 8 + 256 + 8)
+
+/* for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */
+#define TX_HEADER_LEN \
+	(sizeof(struct fw_ofld_tx_data_wr) + sizeof(struct sge_opaque_hdr))
+#define TX_TLSHDR_LEN \
+	(sizeof(struct fw_tlstx_data_wr) + sizeof(struct cpl_tx_tls_sfo) + \
+	 sizeof(struct sge_opaque_hdr))
+#define TXDATA_SKB_LEN 128
+
+enum {
+	CPL_TX_TLS_SFO_TYPE_CCS,
+	CPL_TX_TLS_SFO_TYPE_ALERT,
+	CPL_TX_TLS_SFO_TYPE_HANDSHAKE,
+	CPL_TX_TLS_SFO_TYPE_DATA,
+	CPL_TX_TLS_SFO_TYPE_HEARTBEAT,
+};
+
+enum {
+	TLS_HDR_TYPE_CCS = 20,
+	TLS_HDR_TYPE_ALERT,
+	TLS_HDR_TYPE_HANDSHAKE,
+	TLS_HDR_TYPE_RECORD,
+	TLS_HDR_TYPE_HEARTBEAT,
+};
+
+typedef void (*defer_handler_t)(struct chtls_dev *dev, struct sk_buff *skb);
+extern struct request_sock_ops chtls_rsk_ops;
+
+struct deferred_skb_cb {
+	defer_handler_t handler;
+	struct chtls_dev *dev;
+};
+
+#define DEFERRED_SKB_CB(skb) ((struct deferred_skb_cb *)(skb)->cb)
+#define failover_flowc_wr_len offsetof(struct fw_flowc_wr, mnemval[3])
+#define WR_SKB_CB(skb) ((struct wr_skb_cb *)(skb)->cb)
+#define ACCEPT_QUEUE(sk) (&inet_csk(sk)->icsk_accept_queue.rskq_accept_head)
+
+#define SND_WSCALE(tp) ((tp)->rx_opt.snd_wscale)
+#define RCV_WSCALE(tp) ((tp)->rx_opt.rcv_wscale)
+#define USER_MSS(tp) ((tp)->rx_opt.user_mss)
+#define TS_RECENT_STAMP(tp) ((tp)->rx_opt.ts_recent_stamp)
+#define WSCALE_OK(tp) ((tp)->rx_opt.wscale_ok)
+#define TSTAMP_OK(tp) ((tp)->rx_opt.tstamp_ok)
+#define SACK_OK(tp) ((tp)->rx_opt.sack_ok)
+#define INC_ORPHAN_COUNT(sk) percpu_counter_inc((sk)->sk_prot->orphan_count)
+
+/* TLS SKB */
+#define skb_ulp_tls_inline(skb)      (ULP_SKB_CB(skb)->ulp.tls.ofld)
+#define skb_ulp_tls_iv_imm(skb)      (ULP_SKB_CB(skb)->ulp.tls.iv)
+
+void chtls_defer_reply(struct sk_buff *skb, struct chtls_dev *dev,
+		       defer_handler_t handler);
+
+/*
+ * Returns true if the socket is in one of the supplied states.
+ */
+static inline unsigned int sk_in_state(const struct sock *sk,
+				       unsigned int states)
+{
+	return states & (1 << sk->sk_state);
+}
+
+static void chtls_rsk_destructor(struct request_sock *req)
+{
+	/* do nothing */
+}
+
+static inline void chtls_init_rsk_ops(struct proto *chtls_tcp_prot,
+				      struct request_sock_ops *chtls_tcp_ops,
+				      struct proto *tcp_prot, int family)
+{
+	memset(chtls_tcp_ops, 0, sizeof(*chtls_tcp_ops));
+	chtls_tcp_ops->family = family;
+	chtls_tcp_ops->obj_size = sizeof(struct tcp_request_sock);
+	chtls_tcp_ops->destructor = chtls_rsk_destructor;
+	chtls_tcp_ops->slab = tcp_prot->rsk_prot->slab;
+	chtls_tcp_prot->rsk_prot = chtls_tcp_ops;
+}
+
+static inline void chtls_reqsk_free(struct request_sock *req)
+{
+	if (req->rsk_listener)
+		sock_put(req->rsk_listener);
+	kmem_cache_free(req->rsk_ops->slab, req);
+}
+
+#define DECLARE_TASK_FUNC(task, task_param) \
+		static void task(struct work_struct *task_param)
+
+static inline void sk_wakeup_sleepers(struct sock *sk, bool interruptable)
+{
+	struct socket_wq *wq;
+
+	rcu_read_lock();
+	wq = rcu_dereference(sk->sk_wq);
+	if (skwq_has_sleeper(wq)) {
+		if (interruptable)
+			wake_up_interruptible(sk_sleep(sk));
+		else
+			wake_up_all(sk_sleep(sk));
+	}
+	rcu_read_unlock();
+}
+
+static inline void chtls_set_req_port(struct request_sock *oreq,
+				      __be16 source, __be16 dest)
+{
+	inet_rsk(oreq)->ir_rmt_port = source;
+	inet_rsk(oreq)->ir_num = ntohs(dest);
+}
+
+static inline void chtls_set_req_addr(struct request_sock *oreq,
+				      __be32 local_ip, __be32 peer_ip)
+{
+	inet_rsk(oreq)->ir_loc_addr = local_ip;
+	inet_rsk(oreq)->ir_rmt_addr = peer_ip;
+}
+
+static inline void chtls_free_skb(struct sock *sk, struct sk_buff *skb)
+{
+	skb_dst_set(skb, NULL);
+	__skb_unlink(skb, &sk->sk_receive_queue);
+	__kfree_skb(skb);
+}
+
+static inline void chtls_kfree_skb(struct sock *sk, struct sk_buff *skb)
+{
+	skb_dst_set(skb, NULL);
+	__skb_unlink(skb, &sk->sk_receive_queue);
+	kfree_skb(skb);
+}
+
+static inline void enqueue_wr(struct chtls_sock *csk, struct sk_buff *skb)
+{
+	WR_SKB_CB(skb)->next_wr = NULL;
+
+	skb_get(skb);
+
+	if (!csk->wr_skb_head)
+		csk->wr_skb_head = skb;
+	else
+		WR_SKB_CB(csk->wr_skb_tail)->next_wr = skb;
+	csk->wr_skb_tail = skb;
+}
+#endif