tcp_offload.c revision 195699
1174704Skmacy/*- 2174704Skmacy * Copyright (c) 2007, Chelsio Inc. 3174704Skmacy * All rights reserved. 4174704Skmacy * 5174704Skmacy * Redistribution and use in source and binary forms, with or without 6174704Skmacy * modification, are permitted provided that the following conditions are met: 7174704Skmacy * 8174704Skmacy * 1. Redistributions of source code must retain the above copyright notice, 9174704Skmacy * this list of conditions and the following disclaimer. 10174704Skmacy * 11174704Skmacy * 2. Neither the name of the Chelsio Corporation nor the names of its 12174704Skmacy * contributors may be used to endorse or promote products derived from 13174704Skmacy * this software without specific prior written permission. 14174704Skmacy * 15174704Skmacy * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16174704Skmacy * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17174704Skmacy * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18174704Skmacy * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19174704Skmacy * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20174704Skmacy * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21174704Skmacy * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22174704Skmacy * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23174704Skmacy * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24174704Skmacy * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25174704Skmacy * POSSIBILITY OF SUCH DAMAGE. 26174704Skmacy */ 27174704Skmacy 28174704Skmacy#include <sys/cdefs.h> 29174704Skmacy__FBSDID("$FreeBSD: head/sys/netinet/tcp_offload.c 195699 2009-07-14 22:48:30Z rwatson $"); 30174704Skmacy 31174704Skmacy#include <sys/param.h> 32174704Skmacy#include <sys/systm.h> 33174704Skmacy#include <sys/types.h> 34174704Skmacy#include <sys/malloc.h> 35174704Skmacy#include <sys/kernel.h> 36174704Skmacy#include <sys/sysctl.h> 37174704Skmacy#include <sys/mbuf.h> 38174704Skmacy#include <sys/socket.h> 39174704Skmacy#include <sys/socketvar.h> 40181803Sbz#include <sys/vimage.h> 41174704Skmacy 42174704Skmacy#include <net/if.h> 43174704Skmacy#include <net/if_types.h> 44174704Skmacy#include <net/if_var.h> 45194739Sbz#include <net/route.h> 46174704Skmacy 47174704Skmacy#include <netinet/in.h> 48174704Skmacy#include <netinet/in_systm.h> 49174704Skmacy#include <netinet/in_pcb.h> 50174704Skmacy#include <netinet/tcp.h> 51174704Skmacy#include <netinet/tcp_var.h> 52174704Skmacy#include <netinet/tcp_offload.h> 53174704Skmacy#include <netinet/toedev.h> 54174704Skmacy 55182591Skmacyuint32_t toedev_registration_count; 56182591Skmacy 57174704Skmacyint 58174704Skmacytcp_offload_connect(struct socket *so, struct sockaddr *nam) 59174704Skmacy{ 60174704Skmacy struct ifnet *ifp; 61174704Skmacy struct toedev *tdev; 62174704Skmacy struct rtentry *rt; 63174704Skmacy int error; 64174704Skmacy 65182591Skmacy if (toedev_registration_count == 0) 66182591Skmacy return (EINVAL); 67182591Skmacy 68174704Skmacy /* 69174704Skmacy * Look up the route used for the connection to 70174704Skmacy * determine if it uses an interface capable of 71174704Skmacy * offloading the connection. 72174704Skmacy */ 73182591Skmacy rt = rtalloc1(nam, 0 /*report*/, 0 /*ignflags*/); 74174704Skmacy if (rt) 75174704Skmacy RT_UNLOCK(rt); 76174704Skmacy else 77174704Skmacy return (EHOSTUNREACH); 78174704Skmacy 79174704Skmacy ifp = rt->rt_ifp; 80174704Skmacy if ((ifp->if_capenable & IFCAP_TOE) == 0) { 81174704Skmacy error = EINVAL; 82174704Skmacy goto fail; 83174704Skmacy } 84174704Skmacy 85174704Skmacy tdev = TOEDEV(ifp); 86174704Skmacy if (tdev == NULL) { 87174704Skmacy error = EPERM; 88174704Skmacy goto fail; 89174704Skmacy } 90174704Skmacy 91174704Skmacy if (tdev->tod_can_offload(tdev, so) == 0) { 92174704Skmacy error = EPERM; 93174704Skmacy goto fail; 94174704Skmacy } 95174704Skmacy 96174704Skmacy return (tdev->tod_connect(tdev, so, rt, nam)); 97174704Skmacyfail: 98174704Skmacy RTFREE(rt); 99174704Skmacy return (error); 100174704Skmacy} 101180648Skmacy 102180648Skmacy 103180648Skmacy/* 104180648Skmacy * This file contains code as a short-term staging area before it is moved in 105180648Skmacy * to sys/netinet/tcp_offload.c 106180648Skmacy */ 107180648Skmacy 108180648Skmacyvoid 109180648Skmacytcp_offload_twstart(struct tcpcb *tp) 110180648Skmacy{ 111180648Skmacy 112181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 113180674Skmacy INP_WLOCK(tp->t_inpcb); 114180648Skmacy tcp_twstart(tp); 115181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 116180648Skmacy} 117180648Skmacy 118180648Skmacystruct tcpcb * 119180648Skmacytcp_offload_close(struct tcpcb *tp) 120180648Skmacy{ 121195699Srwatson 122181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 123180648Skmacy INP_WLOCK(tp->t_inpcb); 124180648Skmacy tp = tcp_close(tp); 125181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 126180648Skmacy if (tp) 127180648Skmacy INP_WUNLOCK(tp->t_inpcb); 128180648Skmacy 129180648Skmacy return (tp); 130180648Skmacy} 131180648Skmacy 132180648Skmacystruct tcpcb * 133180648Skmacytcp_offload_drop(struct tcpcb *tp, int error) 134180648Skmacy{ 135195699Srwatson 136181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 137180648Skmacy INP_WLOCK(tp->t_inpcb); 138180648Skmacy tp = tcp_drop(tp, error); 139181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 140180648Skmacy if (tp) 141180648Skmacy INP_WUNLOCK(tp->t_inpcb); 142180648Skmacy 143180648Skmacy return (tp); 144180648Skmacy} 145180648Skmacy 146