tcp_offload.c revision 194739
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 194739 2009-06-23 17:03:45Z bz $"); 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> 54185571Sbz#include <netinet/vinet.h> 55174704Skmacy 56182591Skmacyuint32_t toedev_registration_count; 57182591Skmacy 58174704Skmacyint 59174704Skmacytcp_offload_connect(struct socket *so, struct sockaddr *nam) 60174704Skmacy{ 61174704Skmacy struct ifnet *ifp; 62174704Skmacy struct toedev *tdev; 63174704Skmacy struct rtentry *rt; 64174704Skmacy int error; 65174704Skmacy 66182591Skmacy if (toedev_registration_count == 0) 67182591Skmacy return (EINVAL); 68182591Skmacy 69174704Skmacy /* 70174704Skmacy * Look up the route used for the connection to 71174704Skmacy * determine if it uses an interface capable of 72174704Skmacy * offloading the connection. 73174704Skmacy */ 74182591Skmacy rt = rtalloc1(nam, 0 /*report*/, 0 /*ignflags*/); 75174704Skmacy if (rt) 76174704Skmacy RT_UNLOCK(rt); 77174704Skmacy else 78174704Skmacy return (EHOSTUNREACH); 79174704Skmacy 80174704Skmacy ifp = rt->rt_ifp; 81174704Skmacy if ((ifp->if_capenable & IFCAP_TOE) == 0) { 82174704Skmacy error = EINVAL; 83174704Skmacy goto fail; 84174704Skmacy } 85174704Skmacy 86174704Skmacy tdev = TOEDEV(ifp); 87174704Skmacy if (tdev == NULL) { 88174704Skmacy error = EPERM; 89174704Skmacy goto fail; 90174704Skmacy } 91174704Skmacy 92174704Skmacy if (tdev->tod_can_offload(tdev, so) == 0) { 93174704Skmacy error = EPERM; 94174704Skmacy goto fail; 95174704Skmacy } 96174704Skmacy 97174704Skmacy return (tdev->tod_connect(tdev, so, rt, nam)); 98174704Skmacyfail: 99174704Skmacy RTFREE(rt); 100174704Skmacy return (error); 101174704Skmacy} 102180648Skmacy 103180648Skmacy 104180648Skmacy/* 105180648Skmacy * This file contains code as a short-term staging area before it is moved in 106180648Skmacy * to sys/netinet/tcp_offload.c 107180648Skmacy */ 108180648Skmacy 109180648Skmacyvoid 110180648Skmacytcp_offload_twstart(struct tcpcb *tp) 111180648Skmacy{ 112183550Szec INIT_VNET_INET(curvnet); 113180648Skmacy 114181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 115180674Skmacy INP_WLOCK(tp->t_inpcb); 116180648Skmacy tcp_twstart(tp); 117181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 118180648Skmacy} 119180648Skmacy 120180648Skmacystruct tcpcb * 121180648Skmacytcp_offload_close(struct tcpcb *tp) 122180648Skmacy{ 123183550Szec INIT_VNET_INET(curvnet); 124180648Skmacy 125181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 126180648Skmacy INP_WLOCK(tp->t_inpcb); 127180648Skmacy tp = tcp_close(tp); 128181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 129180648Skmacy if (tp) 130180648Skmacy INP_WUNLOCK(tp->t_inpcb); 131180648Skmacy 132180648Skmacy return (tp); 133180648Skmacy} 134180648Skmacy 135180648Skmacystruct tcpcb * 136180648Skmacytcp_offload_drop(struct tcpcb *tp, int error) 137180648Skmacy{ 138183550Szec INIT_VNET_INET(curvnet); 139180648Skmacy 140181803Sbz INP_INFO_WLOCK(&V_tcbinfo); 141180648Skmacy INP_WLOCK(tp->t_inpcb); 142180648Skmacy tp = tcp_drop(tp, error); 143181803Sbz INP_INFO_WUNLOCK(&V_tcbinfo); 144180648Skmacy if (tp) 145180648Skmacy INP_WUNLOCK(tp->t_inpcb); 146180648Skmacy 147180648Skmacy return (tp); 148180648Skmacy} 149180648Skmacy 150