1 /*- 2 * Copyright (c) 2012 Chelsio Communications, 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 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_inet.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/mbuf.h> 36 #include <sys/socket.h> 37 #include <sys/socketvar.h> 38 #include <sys/sockopt.h> 39 #include <net/if.h> 40 #include <net/if_var.h> 41 #include <net/route.h> 42 #include <netinet/in.h> 43 #include <netinet/in_pcb.h> 44 #include <netinet/tcp.h> 45 #include <netinet/tcp_var.h> 46 #include <netinet/tcp_offload.h> 47 #include <net/rt_nhops.h> 48 #define TCPOUTFLAGS 49 #include <netinet/tcp_fsm.h> 50 #include <netinet/toecore.h> 51 #include <netinet6/scope6_var.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 nhopu_extended nhu_ext; 64 int af, error = EOPNOTSUPP; 65 int fibnum; 66 67 INP_WLOCK_ASSERT(sotoinpcb(so)); 68 KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6, 69 ("%s: called with sa_family %d", __func__, nam->sa_family)); 70 71 if (registered_toedevs == 0) 72 return (error); 73 74 af = nam->sa_family; 75 fibnum = so->so_fibnum; 76 ifp = NULL; 77 78 /* TODO: Multipath */ 79 if (af == AF_INET) { 80 if (fib4_lookup_nh_ext(fibnum, 81 ((struct sockaddr_in *)nam)->sin_addr, 82 0, NHOP_LOOKUP_REF, &nhu_ext.u.nh4) != 0) 83 return (EHOSTUNREACH); 84 85 ifp = nhu_ext.u.nh4.nh_ifp; 86 if ((ifp->if_capenable & IFCAP_TOE4) == 0) 87 goto done; 88 } else if (af == AF_INET6) { 89 struct sockaddr_in6 *sin6; 90 struct in6_addr dst; 91 uint32_t scopeid; 92 93 sin6 = (struct sockaddr_in6 *)nam; 94 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 95 96 if (fib6_lookup_nh_ext(fibnum, &dst, scopeid, 97 0, NHOP_LOOKUP_REF, &nhu_ext.u.nh6) != 0) 98 return (EHOSTUNREACH); 99 100 ifp = nhu_ext.u.nh6.nh_ifp; 101 if ((ifp->if_capenable & IFCAP_TOE6) == 0) 102 goto done; 103 } 104 105 tod = TOEDEV(ifp); 106 if (tod != NULL) 107 error = tod->tod_connect(tod, so, &nhu_ext, nam); 108 done: 109 fib_free_nh_ext(fibnum, &nhu_ext); 110 return (error); 111 } 112 113 void 114 tcp_offload_listen_start(struct tcpcb *tp) 115 { 116 117 INP_WLOCK_ASSERT(tp->t_inpcb); 118 119 EVENTHANDLER_INVOKE(tcp_offload_listen_start, tp); 120 } 121 122 void 123 tcp_offload_listen_stop(struct tcpcb *tp) 124 { 125 126 INP_WLOCK_ASSERT(tp->t_inpcb); 127 128 EVENTHANDLER_INVOKE(tcp_offload_listen_stop, tp); 129 } 130 131 void 132 tcp_offload_input(struct tcpcb *tp, struct mbuf *m) 133 { 134 struct toedev *tod = tp->tod; 135 136 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 137 INP_WLOCK_ASSERT(tp->t_inpcb); 138 139 tod->tod_input(tod, tp, m); 140 } 141 142 int 143 tcp_offload_output(struct tcpcb *tp) 144 { 145 struct toedev *tod = tp->tod; 146 int error, flags; 147 148 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 149 INP_WLOCK_ASSERT(tp->t_inpcb); 150 151 flags = tcp_outflags[tp->t_state]; 152 153 if (flags & TH_RST) { 154 /* XXX: avoid repeated calls like we do for FIN */ 155 error = tod->tod_send_rst(tod, tp); 156 } else if ((flags & TH_FIN || tp->t_flags & TF_NEEDFIN) && 157 (tp->t_flags & TF_SENTFIN) == 0) { 158 error = tod->tod_send_fin(tod, tp); 159 if (error == 0) 160 tp->t_flags |= TF_SENTFIN; 161 } else 162 error = tod->tod_output(tod, tp); 163 164 return (error); 165 } 166 167 void 168 tcp_offload_rcvd(struct tcpcb *tp) 169 { 170 struct toedev *tod = tp->tod; 171 172 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 173 INP_WLOCK_ASSERT(tp->t_inpcb); 174 175 tod->tod_rcvd(tod, tp); 176 } 177 178 void 179 tcp_offload_ctloutput(struct tcpcb *tp, int sopt_dir, int sopt_name) 180 { 181 struct toedev *tod = tp->tod; 182 183 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 184 INP_WLOCK_ASSERT(tp->t_inpcb); 185 186 tod->tod_ctloutput(tod, tp, sopt_dir, sopt_name); 187 } 188 189 void 190 tcp_offload_detach(struct tcpcb *tp) 191 { 192 struct toedev *tod = tp->tod; 193 194 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); 195 INP_WLOCK_ASSERT(tp->t_inpcb); 196 197 tod->tod_pcb_detach(tod, tp); 198 } 199