tcp_offload.c revision 182591
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 182591 2008-09-01 05:30:22Z kmacy $"); 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> 45174704Skmacy 46174704Skmacy#include <netinet/in.h> 47174704Skmacy#include <netinet/in_systm.h> 48174704Skmacy#include <netinet/in_pcb.h> 49174704Skmacy#include <netinet/tcp.h> 50174704Skmacy#include <netinet/tcp_var.h> 51174704Skmacy#include <netinet/tcp_offload.h> 52174704Skmacy#include <netinet/toedev.h> 53174704Skmacy 54182591Skmacyuint32_t toedev_registration_count; 55182591Skmacy 56174704Skmacyint 57174704Skmacytcp_offload_connect(struct socket *so, struct sockaddr *nam) 58174704Skmacy{ 59174704Skmacy struct ifnet *ifp; 60174704Skmacy struct toedev *tdev; 61174704Skmacy struct rtentry *rt; 62174704Skmacy int error; 63174704Skmacy 64182591Skmacy if (toedev_registration_count == 0) 65182591Skmacy return (EINVAL); 66182591Skmacy 67174704Skmacy /* 68174704Skmacy * Look up the route used for the connection to 69174704Skmacy * determine if it uses an interface capable of 70174704Skmacy * offloading the connection. 71174704Skmacy */ 72182591Skmacy rt = rtalloc1(nam, 0 /*report*/, 0 /*ignflags*/); 73174704Skmacy if (rt) 74174704Skmacy RT_UNLOCK(rt); 75174704Skmacy else 76174704Skmacy return (EHOSTUNREACH); 77174704Skmacy 78174704Skmacy ifp = rt->rt_ifp; 79174704Skmacy if ((ifp->if_capenable & IFCAP_TOE) == 0) { 80174704Skmacy error = EINVAL; 81174704Skmacy goto fail; 82174704Skmacy } 83174704Skmacy 84174704Skmacy tdev = TOEDEV(ifp); 85174704Skmacy if (tdev == NULL) { 86174704Skmacy error = EPERM; 87174704Skmacy goto fail; 88174704Skmacy } 89174704Skmacy 90174704Skmacy if (tdev->tod_can_offload(tdev, so) == 0) { 91174704Skmacy error = EPERM; 92174704Skmacy goto fail; 93174704Skmacy } 94174704Skmacy 95174704Skmacy return (tdev->tod_connect(tdev, so, rt, nam)); 96174704Skmacyfail: 97174704Skmacy RTFREE(rt); 98174704Skmacy return (error); 99174704Skmacy} 100180648Skmacy 101180648Skmacy 102180648Skmacy/* 103180648Skmacy * This file contains code as a short-term staging area before it is moved in 104180648Skmacy * to sys/netinet/tcp_offload.c 105180648Skmacy */ 106180648Skmacy 107180648Skmacyvoid 108180648Skmacytcp_offload_twstart(struct tcpcb *tp) 109180648Skmacy{ 110180648Skmacy 111181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 112180674Skmacy INP_WLOCK(tp->t_inpcb); 113180648Skmacy tcp_twstart(tp); 114181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 115180648Skmacy} 116180648Skmacy 117180648Skmacystruct tcpcb * 118180648Skmacytcp_offload_close(struct tcpcb *tp) 119180648Skmacy{ 120180648Skmacy 121181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 122180648Skmacy INP_WLOCK(tp->t_inpcb); 123180648Skmacy tp = tcp_close(tp); 124181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 125180648Skmacy if (tp) 126180648Skmacy INP_WUNLOCK(tp->t_inpcb); 127180648Skmacy 128180648Skmacy return (tp); 129180648Skmacy} 130180648Skmacy 131180648Skmacystruct tcpcb * 132180648Skmacytcp_offload_drop(struct tcpcb *tp, int error) 133180648Skmacy{ 134180648Skmacy 135181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 136180648Skmacy INP_WLOCK(tp->t_inpcb); 137180648Skmacy tp = tcp_drop(tp, error); 138181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 139180648Skmacy if (tp) 140180648Skmacy INP_WUNLOCK(tp->t_inpcb); 141180648Skmacy 142180648Skmacy return (tp); 143180648Skmacy} 144180648Skmacy 145