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 #include <netinet/vinet.h> 54 55 uint32_t toedev_registration_count; 56 57 int 58 tcp_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)); 97 fail: 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 */ 107 108 void 109 tcp_offload_twstart(struct tcpcb *tp) 110 { 111 INIT_VNET_INET(curvnet); 112 113 INP_INFO_WLOCK(&V_tcbinfo); 114 INP_WLOCK(tp->t_inpcb); 115 tcp_twstart(tp); 116 INP_INFO_WUNLOCK(&V_tcbinfo); 117 } 118 119 struct tcpcb * 120 tcp_offload_close(struct tcpcb *tp) 121 { 122 INIT_VNET_INET(curvnet); 123 124 INP_INFO_WLOCK(&V_tcbinfo); 125 INP_WLOCK(tp->t_inpcb); 126 tp = tcp_close(tp); 127 INP_INFO_WUNLOCK(&V_tcbinfo); 128 if (tp) 129 INP_WUNLOCK(tp->t_inpcb); 130 131 return (tp); 132 } 133 134 struct tcpcb * 135 tcp_offload_drop(struct tcpcb *tp, int error) 136 { 137 INIT_VNET_INET(curvnet); 138 139 INP_INFO_WLOCK(&V_tcbinfo); 140 INP_WLOCK(tp->t_inpcb); 141 tp = tcp_drop(tp, error); 142 INP_INFO_WUNLOCK(&V_tcbinfo); 143 if (tp) 144 INP_WUNLOCK(tp->t_inpcb); 145 146 return (tp); 147 } 148 149