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/*-
* Copyright (c) 2007, Chelsio Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Neither the name of the Chelsio Corporation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _NETINET_TCP_OFLD_H_
#define _NETINET_TCP_OFLD_H_
#ifndef _KERNEL
#error "no user-serviceable parts inside"
#endif
#define SC_ENTRY_PRESENT 1
#define SC_DROP 2
#define tp_offload(tp) ((tp)->t_flags & TF_TOE)
#define SO_OFFLOADABLE(so) ((so->so_options & SO_NO_OFFLOAD) == 0)
int ofld_connect(struct socket *so, struct sockaddr *nam);
int ofld_can_offload(struct tcpcb *tp, struct sockaddr *nam);
int ofld_abort(struct tcpcb *tp);
int ofld_disconnect(struct tcpcb *tp);
int ofld_send(struct tcpcb *tp);
int ofld_rcvd(struct tcpcb *tp);
void ofld_detach(struct tcpcb *tp);
void ofld_listen_close(struct tcpcb *tp);
void ofld_listen_open(struct tcpcb *tp);
#ifndef DISABLE_TCP_OFFLOAD
static __inline int
tcp_gen_connect(struct socket *so, struct sockaddr *nam)
{
struct tcpcb *tp = sototcpcb(so);
int error;
if (!SO_OFFLOADABLE(so) || (error = ofld_connect(so, nam)) != 0)
error = tcp_output(tp);
return (error);
}
static __inline int
tcp_gen_disconnect(struct tcpcb *tp)
{
int error;
if (tp_offload(tp))
error = ofld_disconnect(tp);
else
error = tcp_output(tp);
return (error);
}
static __inline int
tcp_gen_abort(struct tcpcb *tp)
{
int error;
if (tp_offload(tp))
error = ofld_abort(tp);
else
error = tcp_output(tp);
return (error);
}
static __inline int
tcp_gen_send(struct tcpcb *tp)
{
int error;
if (tp_offload(tp))
error = ofld_send(tp);
else
error = tcp_output(tp);
return (error);
}
static __inline int
tcp_gen_rcvd(struct tcpcb *tp)
{
int error;
if (tp_offload(tp))
error = ofld_rcvd(tp);
else
error = tcp_output(tp);
return (error);
}
static __inline void
tcp_gen_listen_open(struct tcpcb *tp)
{
if (SO_OFFLOADABLE(tp->t_inpcb->inp_socket))
ofld_listen_open(tp);
}
static __inline void
tcp_gen_listen_close(struct tcpcb *tp)
{
ofld_listen_close(tp);
}
static __inline void
tcp_gen_detach(struct tcpcb *tp)
{
if (tp_offload(tp))
ofld_detach(tp);
}
#else
static __inline int
tcp_gen_connect(struct socket *so, struct sockaddr *nam)
{
return (tcp_output(tp));
}
static __inline int
tcp_gen_disconnect(struct tcpcb *tp)
{
return (tcp_output(tp));
}
static __inline int
tcp_gen_abort(struct tcpcb *tp)
{
return (tcp_output(tp));
}
static __inline int
tcp_gen_send(struct tcpcb *tp)
{
return (tcp_output(tp));
}
static __inline int
tcp_gen_rcvd(struct tcpcb *tp)
{
return (tcp_output(tp));
}
static __inline void
tcp_gen_listen_open(struct tcpcb *tp)
{
}
static __inline void
tcp_gen_listen_close(struct tcpcb *tp)
{
}
static __inline void
tcp_gen_detach(struct tcpcb *tp)
{
}
#endif
struct toe_usrreqs {
int (*tu_send)(struct tcpcb *tp);
int (*tu_rcvd)(struct tcpcb *tp);
int (*tu_disconnect)(struct tcpcb *tp);
int (*tu_abort)(struct tcpcb *tp);
void (*tu_detach)(struct tcpcb *tp);
void (*tu_syncache_event)(int event, void *toep);
};
#define OFLD_LISTEN_OPEN 1
#define OFLD_LISTEN_CLOSE 2
typedef void (*ofld_listen_fn)(void *, int, struct tcpcb *);
EVENTHANDLER_DECLARE(ofld_listen, ofld_listen_fn);
#endif
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