tcp_offload.c revision 195699
157434Smarkm/*- 257434Smarkm * Copyright (c) 2007, Chelsio Inc. 357434Smarkm * All rights reserved. 457434Smarkm * 576264Sgreen * Redistribution and use in source and binary forms, with or without 657434Smarkm * modification, are permitted provided that the following conditions are met: 790405Sru * 890405Sru * 1. Redistributions of source code must retain the above copyright notice, 974818Sru * this list of conditions and the following disclaimer. 1057434Smarkm * 1157434Smarkm * 2. Neither the name of the Chelsio Corporation nor the names of its 1274818Sru * contributors may be used to endorse or promote products derived from 13 * this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: head/sys/netinet/tcp_offload.c 195699 2009-07-14 22:48:30Z rwatson $"); 30 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/types.h> 34#include <sys/malloc.h> 35#include <sys/kernel.h> 36#include <sys/sysctl.h> 37#include <sys/mbuf.h> 38#include <sys/socket.h> 39#include <sys/socketvar.h> 40#include <sys/vimage.h> 41 42#include <net/if.h> 43#include <net/if_types.h> 44#include <net/if_var.h> 45#include <net/route.h> 46 47#include <netinet/in.h> 48#include <netinet/in_systm.h> 49#include <netinet/in_pcb.h> 50#include <netinet/tcp.h> 51#include <netinet/tcp_var.h> 52#include <netinet/tcp_offload.h> 53#include <netinet/toedev.h> 54 55uint32_t toedev_registration_count; 56 57int 58tcp_offload_connect(struct socket *so, struct sockaddr *nam) 59{ 60 struct ifnet *ifp; 61 struct toedev *tdev; 62 struct rtentry *rt; 63 int error; 64 65 if (toedev_registration_count == 0) 66 return (EINVAL); 67 68 /* 69 * Look up the route used for the connection to 70 * determine if it uses an interface capable of 71 * offloading the connection. 72 */ 73 rt = rtalloc1(nam, 0 /*report*/, 0 /*ignflags*/); 74 if (rt) 75 RT_UNLOCK(rt); 76 else 77 return (EHOSTUNREACH); 78 79 ifp = rt->rt_ifp; 80 if ((ifp->if_capenable & IFCAP_TOE) == 0) { 81 error = EINVAL; 82 goto fail; 83 } 84 85 tdev = TOEDEV(ifp); 86 if (tdev == NULL) { 87 error = EPERM; 88 goto fail; 89 } 90 91 if (tdev->tod_can_offload(tdev, so) == 0) { 92 error = EPERM; 93 goto fail; 94 } 95 96 return (tdev->tod_connect(tdev, so, rt, nam)); 97fail: 98 RTFREE(rt); 99 return (error); 100} 101 102 103/* 104 * This file contains code as a short-term staging area before it is moved in 105 * to sys/netinet/tcp_offload.c 106 */ 107 108void 109tcp_offload_twstart(struct tcpcb *tp) 110{ 111 112 INP_INFO_WLOCK(&V_tcbinfo); 113 INP_WLOCK(tp->t_inpcb); 114 tcp_twstart(tp); 115 INP_INFO_WUNLOCK(&V_tcbinfo); 116} 117 118struct tcpcb * 119tcp_offload_close(struct tcpcb *tp) 120{ 121 122 INP_INFO_WLOCK(&V_tcbinfo); 123 INP_WLOCK(tp->t_inpcb); 124 tp = tcp_close(tp); 125 INP_INFO_WUNLOCK(&V_tcbinfo); 126 if (tp) 127 INP_WUNLOCK(tp->t_inpcb); 128 129 return (tp); 130} 131 132struct tcpcb * 133tcp_offload_drop(struct tcpcb *tp, int error) 134{ 135 136 INP_INFO_WLOCK(&V_tcbinfo); 137 INP_WLOCK(tp->t_inpcb); 138 tp = tcp_drop(tp, error); 139 INP_INFO_WUNLOCK(&V_tcbinfo); 140 if (tp) 141 INP_WUNLOCK(tp->t_inpcb); 142 143 return (tp); 144} 145 146