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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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/vimage.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_offload.h>
#include <netinet/toedev.h>
uint32_t toedev_registration_count;
int
tcp_offload_connect(struct socket *so, struct sockaddr *nam)
{
struct ifnet *ifp;
struct toedev *tdev;
struct rtentry *rt;
int error;
if (toedev_registration_count == 0)
return (EINVAL);
/*
* Look up the route used for the connection to
* determine if it uses an interface capable of
* offloading the connection.
*/
rt = rtalloc1(nam, 0 /*report*/, 0 /*ignflags*/);
if (rt)
RT_UNLOCK(rt);
else
return (EHOSTUNREACH);
ifp = rt->rt_ifp;
if ((ifp->if_capenable & IFCAP_TOE) == 0) {
error = EINVAL;
goto fail;
}
tdev = TOEDEV(ifp);
if (tdev == NULL) {
error = EPERM;
goto fail;
}
if (tdev->tod_can_offload(tdev, so) == 0) {
error = EPERM;
goto fail;
}
return (tdev->tod_connect(tdev, so, rt, nam));
fail:
RTFREE(rt);
return (error);
}
/*
* This file contains code as a short-term staging area before it is moved in
* to sys/netinet/tcp_offload.c
*/
void
tcp_offload_twstart(struct tcpcb *tp)
{
INP_INFO_WLOCK(&V_tcbinfo);
INP_WLOCK(tp->t_inpcb);
tcp_twstart(tp);
INP_INFO_WUNLOCK(&V_tcbinfo);
}
struct tcpcb *
tcp_offload_close(struct tcpcb *tp)
{
INP_INFO_WLOCK(&V_tcbinfo);
INP_WLOCK(tp->t_inpcb);
tp = tcp_close(tp);
INP_INFO_WUNLOCK(&V_tcbinfo);
if (tp)
INP_WUNLOCK(tp->t_inpcb);
return (tp);
}
struct tcpcb *
tcp_offload_drop(struct tcpcb *tp, int error)
{
INP_INFO_WLOCK(&V_tcbinfo);
INP_WLOCK(tp->t_inpcb);
tp = tcp_drop(tp, error);
INP_INFO_WUNLOCK(&V_tcbinfo);
if (tp)
INP_WUNLOCK(tp->t_inpcb);
return (tp);
}
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