1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 Chelsio Communications, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_inet.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/types.h> 37 #include <sys/mbuf.h> 38 #include <sys/socket.h> 39 #include <sys/socketvar.h> 40 #include <sys/sockopt.h> 41 #include <net/if.h> 42 #include <net/if_var.h> 43 #include <net/route.h> 44 #include <netinet/in.h> 45 #include <netinet/in_pcb.h> 46 #include <netinet/tcp.h> 47 #include <netinet/tcp_offload.h> 48 #define TCPOUTFLAGS 49 #include <netinet/tcp_fsm.h> 50 #include <netinet/tcp_var.h> 51 #include <netinet/toecore.h> 52 53 int registered_toedevs; 54 55 /* 56 * Provide an opportunity for a TOE driver to offload. 57 */ 58 int 59 tcp_offload_connect(struct socket *so, struct sockaddr *nam) 60 { 61 struct ifnet *ifp; 62 struct toedev *tod; 63 struct rtentry *rt; 64 int error = EOPNOTSUPP; 65 66 INP_WLOCK_ASSERT(sotoinpcb(so)); 67 KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6, 68 ("%s: called with sa_family %d", __func__, nam->sa_family)); 69 70 if (registered_toedevs == 0) 71 return (error); 72 73 rt = rtalloc1(nam, 0, 0); 74 if (rt) 75 RT_UNLOCK(rt); 76 else 77 return (EHOSTUNREACH); 78 79 ifp = rt->rt_ifp; 80 81 if (nam->sa_family == AF_INET && !(ifp->if_capenable & IFCAP_TOE4)) 82 goto done; 83 if (nam->sa_family == AF_INET6 && !(ifp->if_capenable & IFCAP_TOE6)) 84 goto done; 85 86 tod = TOEDEV(ifp); 87 if (tod != NULL) 88 error = tod->tod_connect(tod, so, rt, nam); 89 done: 90 RTFREE(rt); 91 return (error); 92 } 93 94 void 95 tcp_offload_listen_start(struct tcpcb *tp) 96 { 97 98 INP_WLOCK_ASSERT(tp->t_inpcb); 99 100 EVENTHANDLER_INVOKE(tcp_offload_listen_start, tp); 101 } 102 103 void 104 tcp_offload_listen_stop(struct tcpcb *tp) 105 { 106 107 INP_WLOCK_ASSERT(tp->t_inpcb); 108 109 EVENTHANDLER_INVOKE(tcp_offload_listen_stop, tp); 110 } 111 112 void 113 tcp_offload_input(struct tcpcb *tp, struct mbuf *m) 114 { 115 struct toedev *tod = tp->tod; 116 117 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 118 INP_WLOCK_ASSERT(tp->t_inpcb); 119 120 tod->tod_input(tod, tp, m); 121 } 122 123 int 124 tcp_offload_output(struct tcpcb *tp) 125 { 126 struct toedev *tod = tp->tod; 127 int error, flags; 128 129 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 130 INP_WLOCK_ASSERT(tp->t_inpcb); 131 132 flags = tcp_outflags[tp->t_state]; 133 134 if (flags & TH_RST) { 135 /* XXX: avoid repeated calls like we do for FIN */ 136 error = tod->tod_send_rst(tod, tp); 137 } else if ((flags & TH_FIN || tp->t_flags & TF_NEEDFIN) && 138 (tp->t_flags & TF_SENTFIN) == 0) { 139 error = tod->tod_send_fin(tod, tp); 140 if (error == 0) 141 tp->t_flags |= TF_SENTFIN; 142 } else 143 error = tod->tod_output(tod, tp); 144 145 return (error); 146 } 147 148 void 149 tcp_offload_rcvd(struct tcpcb *tp) 150 { 151 struct toedev *tod = tp->tod; 152 153 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 154 INP_WLOCK_ASSERT(tp->t_inpcb); 155 156 tod->tod_rcvd(tod, tp); 157 } 158 159 void 160 tcp_offload_ctloutput(struct tcpcb *tp, int sopt_dir, int sopt_name) 161 { 162 struct toedev *tod = tp->tod; 163 164 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 165 INP_WLOCK_ASSERT(tp->t_inpcb); 166 167 tod->tod_ctloutput(tod, tp, sopt_dir, sopt_name); 168 } 169 170 void 171 tcp_offload_tcp_info(struct tcpcb *tp, struct tcp_info *ti) 172 { 173 struct toedev *tod = tp->tod; 174 175 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 176 INP_WLOCK_ASSERT(tp->t_inpcb); 177 178 tod->tod_tcp_info(tod, tp, ti); 179 } 180 181 void 182 tcp_offload_detach(struct tcpcb *tp) 183 { 184 struct toedev *tod = tp->tod; 185 186 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 187 INP_WLOCK_ASSERT(tp->t_inpcb); 188 189 tod->tod_pcb_detach(tod, tp); 190 } 191