1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include "opt_inet6.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/eventhandler.h> 38 #include <sys/mbuf.h> 39 #include <sys/socket.h> 40 #include <sys/socketvar.h> 41 #include <sys/sockopt.h> 42 #include <net/if.h> 43 #include <net/if_var.h> 44 #include <net/if_private.h> 45 #include <net/route.h> 46 #include <net/route/nhop.h> 47 #include <netinet/in.h> 48 #include <netinet/in_pcb.h> 49 #include <netinet/in_fib.h> 50 #include <netinet6/in6_fib.h> 51 #include <netinet/tcp.h> 52 #include <netinet/tcp_offload.h> 53 #define TCPOUTFLAGS 54 #include <netinet/tcp_fsm.h> 55 #include <netinet/tcp_var.h> 56 #include <netinet/toecore.h> 57 58 int registered_toedevs; 59 60 /* 61 * Provide an opportunity for a TOE driver to offload. 62 */ 63 int 64 tcp_offload_connect(struct socket *so, struct sockaddr *nam) 65 { 66 struct ifnet *ifp; 67 struct toedev *tod; 68 struct nhop_object *nh; 69 struct epoch_tracker et; 70 int error = EOPNOTSUPP; 71 72 INP_WLOCK_ASSERT(sotoinpcb(so)); 73 KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6, 74 ("%s: called with sa_family %d", __func__, nam->sa_family)); 75 76 if (registered_toedevs == 0) 77 return (error); 78 79 NET_EPOCH_ENTER(et); 80 nh = NULL; 81 #ifdef INET 82 if (nam->sa_family == AF_INET) 83 nh = fib4_lookup(0, ((struct sockaddr_in *)nam)->sin_addr, 84 NHR_NONE, 0, 0); 85 #endif 86 #if defined(INET) && defined(INET6) 87 else 88 #endif 89 #ifdef INET6 90 if (nam->sa_family == AF_INET6) 91 nh = fib6_lookup(0, &((struct sockaddr_in6 *)nam)->sin6_addr, 92 NHR_NONE, 0, 0); 93 #endif 94 if (nh == NULL) { 95 NET_EPOCH_EXIT(et); 96 return (EHOSTUNREACH); 97 } 98 99 ifp = nh->nh_ifp; 100 101 if (nam->sa_family == AF_INET && !(ifp->if_capenable & IFCAP_TOE4)) 102 goto done; 103 if (nam->sa_family == AF_INET6 && !(ifp->if_capenable & IFCAP_TOE6)) 104 goto done; 105 106 tod = TOEDEV(ifp); 107 if (tod != NULL) 108 error = tod->tod_connect(tod, so, nh, nam); 109 done: 110 NET_EPOCH_EXIT(et); 111 return (error); 112 } 113 114 void 115 tcp_offload_listen_start(struct tcpcb *tp) 116 { 117 118 INP_WLOCK_ASSERT(tptoinpcb(tp)); 119 120 EVENTHANDLER_INVOKE(tcp_offload_listen_start, tp); 121 } 122 123 void 124 tcp_offload_listen_stop(struct tcpcb *tp) 125 { 126 127 INP_WLOCK_ASSERT(tptoinpcb(tp)); 128 129 EVENTHANDLER_INVOKE(tcp_offload_listen_stop, tp); 130 } 131 132 void 133 tcp_offload_input(struct tcpcb *tp, struct mbuf *m) 134 { 135 struct toedev *tod = tp->tod; 136 137 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 138 INP_WLOCK_ASSERT(tptoinpcb(tp)); 139 140 tod->tod_input(tod, tp, m); 141 } 142 143 int 144 tcp_offload_output(struct tcpcb *tp) 145 { 146 struct toedev *tod = tp->tod; 147 int error, flags; 148 149 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 150 INP_WLOCK_ASSERT(tptoinpcb(tp)); 151 152 flags = tcp_outflags[tp->t_state]; 153 154 if (flags & TH_RST) { 155 /* XXX: avoid repeated calls like we do for FIN */ 156 error = tod->tod_send_rst(tod, tp); 157 } else if ((flags & TH_FIN || tp->t_flags & TF_NEEDFIN) && 158 (tp->t_flags & TF_SENTFIN) == 0) { 159 error = tod->tod_send_fin(tod, tp); 160 if (error == 0) 161 tp->t_flags |= TF_SENTFIN; 162 } else 163 error = tod->tod_output(tod, tp); 164 165 return (error); 166 } 167 168 void 169 tcp_offload_rcvd(struct tcpcb *tp) 170 { 171 struct toedev *tod = tp->tod; 172 173 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 174 INP_WLOCK_ASSERT(tptoinpcb(tp)); 175 176 tod->tod_rcvd(tod, tp); 177 } 178 179 void 180 tcp_offload_ctloutput(struct tcpcb *tp, int sopt_dir, int sopt_name) 181 { 182 struct toedev *tod = tp->tod; 183 184 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 185 INP_WLOCK_ASSERT(tptoinpcb(tp)); 186 187 tod->tod_ctloutput(tod, tp, sopt_dir, sopt_name); 188 } 189 190 void 191 tcp_offload_tcp_info(struct tcpcb *tp, struct tcp_info *ti) 192 { 193 struct toedev *tod = tp->tod; 194 195 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 196 INP_WLOCK_ASSERT(tptoinpcb(tp)); 197 198 tod->tod_tcp_info(tod, tp, ti); 199 } 200 201 int 202 tcp_offload_alloc_tls_session(struct tcpcb *tp, struct ktls_session *tls, 203 int direction) 204 { 205 struct toedev *tod = tp->tod; 206 207 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 208 INP_WLOCK_ASSERT(tptoinpcb(tp)); 209 210 return (tod->tod_alloc_tls_session(tod, tp, tls, direction)); 211 } 212 213 void 214 tcp_offload_detach(struct tcpcb *tp) 215 { 216 struct toedev *tod = tp->tod; 217 218 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 219 INP_WLOCK_ASSERT(tptoinpcb(tp)); 220 221 tod->tod_pcb_detach(tod, tp); 222 } 223 224 void 225 tcp_offload_pmtu_update(struct tcpcb *tp, tcp_seq seq, int mtu) 226 { 227 struct toedev *tod = tp->tod; 228 229 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 230 INP_WLOCK_ASSERT(tptoinpcb(tp)); 231 232 tod->tod_pmtu_update(tod, tp, seq, mtu); 233 } 234