1 /*- 2 * Copyright (c) 2007, Chelsio Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Neither the name of the Chelsio Corporation nor the names of its 12 * 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("$FreeBSD$"); 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 46 #include <netinet/in.h> 47 #include <netinet/in_systm.h> 48 #include <netinet/in_pcb.h> 49 #include <netinet/tcp.h> 50 #include <netinet/tcp_var.h> 51 #include <netinet/tcp_offload.h> 52 #include <netinet/toedev.h> 53 54 int 55 tcp_offload_connect(struct socket *so, struct sockaddr *nam) 56 { 57 struct ifnet *ifp; 58 struct toedev *tdev; 59 struct rtentry *rt; 60 int error; 61 62 /* 63 * Look up the route used for the connection to 64 * determine if it uses an interface capable of 65 * offloading the connection. 66 */ 67 rt = rtalloc1(nam, 1 /*report*/, 0 /*ignflags*/); 68 if (rt) 69 RT_UNLOCK(rt); 70 else 71 return (EHOSTUNREACH); 72 73 ifp = rt->rt_ifp; 74 if ((ifp->if_capenable & IFCAP_TOE) == 0) { 75 error = EINVAL; 76 goto fail; 77 } 78 79 tdev = TOEDEV(ifp); 80 if (tdev == NULL) { 81 error = EPERM; 82 goto fail; 83 } 84 85 if (tdev->tod_can_offload(tdev, so) == 0) { 86 error = EPERM; 87 goto fail; 88 } 89 90 return (tdev->tod_connect(tdev, so, rt, nam)); 91 fail: 92 RTFREE(rt); 93 return (error); 94 } 95 96 97 /* 98 * This file contains code as a short-term staging area before it is moved in 99 * to sys/netinet/tcp_offload.c 100 */ 101 102 void 103 tcp_offload_twstart(struct tcpcb *tp) 104 { 105 106 INP_INFO_WLOCK(&V_tcbinfo); 107 INP_WLOCK(tp->t_inpcb); 108 tcp_twstart(tp); 109 INP_INFO_WUNLOCK(&V_tcbinfo); 110 } 111 112 struct tcpcb * 113 tcp_offload_close(struct tcpcb *tp) 114 { 115 116 INP_INFO_WLOCK(&V_tcbinfo); 117 INP_WLOCK(tp->t_inpcb); 118 tp = tcp_close(tp); 119 INP_INFO_WUNLOCK(&V_tcbinfo); 120 if (tp) 121 INP_WUNLOCK(tp->t_inpcb); 122 123 return (tp); 124 } 125 126 struct tcpcb * 127 tcp_offload_drop(struct tcpcb *tp, int error) 128 { 129 130 INP_INFO_WLOCK(&V_tcbinfo); 131 INP_WLOCK(tp->t_inpcb); 132 tp = tcp_drop(tp, error); 133 INP_INFO_WUNLOCK(&V_tcbinfo); 134 if (tp) 135 INP_WUNLOCK(tp->t_inpcb); 136 137 return (tp); 138 } 139 140