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
41 #include <net/if.h>
42 #include <net/if_types.h>
43 #include <net/if_var.h>
44
45 #include <netinet/in.h>
46 #include <netinet/in_systm.h>
47 #include <netinet/in_pcb.h>
48 #include <netinet/tcp.h>
49 #include <netinet/tcp_var.h>
50 #include <netinet/tcp_offload.h>
51 #include <netinet/toedev.h>
52
53 uint32_t toedev_registration_count;
54
55 int
56 tcp_offload_connect(struct socket *so, struct sockaddr *nam)
57 {
58 struct ifnet *ifp;
59 struct toedev *tdev;
60 struct rtentry *rt;
61 int error;
62
63 if (toedev_registration_count == 0)
64 return (EINVAL);
65
66 /*
67 * Look up the route used for the connection to
68 * determine if it uses an interface capable of
69 * offloading the connection.
70 */
71 rt = rtalloc1(nam, 0 /*report*/, 0 /*ignflags*/);
72 if (rt)
73 RT_UNLOCK(rt);
74 else
75 return (EHOSTUNREACH);
76
77 ifp = rt->rt_ifp;
78 if ((ifp->if_capenable & IFCAP_TOE) == 0) {
79 error = EINVAL;
80 goto fail;
81 }
82
83 tdev = TOEDEV(ifp);
84 if (tdev == NULL) {
85 error = EPERM;
86 goto fail;
87 }
88
89 if (tdev->tod_can_offload(tdev, so) == 0) {
90 error = EPERM;
91 goto fail;
92 }
93
94 return (tdev->tod_connect(tdev, so, rt, nam));
95 fail:
96 RTFREE(rt);
97 return (error);
98 }
99
100
101 /*
102 * This file contains code as a short-term staging area before it is moved in
103 * to sys/netinet/tcp_offload.c
104 */
105
106 void
107 tcp_offload_twstart(struct tcpcb *tp)
108 {
109
110 INP_INFO_WLOCK(&tcbinfo);
111 INP_WLOCK(tp->t_inpcb);
112 tcp_twstart(tp);
113 INP_INFO_WUNLOCK(&tcbinfo);
114 }
115
116 struct tcpcb *
117 tcp_offload_close(struct tcpcb *tp)
118 {
119
120 INP_INFO_WLOCK(&tcbinfo);
121 INP_WLOCK(tp->t_inpcb);
122 tp = tcp_close(tp);
123 INP_INFO_WUNLOCK(&tcbinfo);
124 if (tp)
125 INP_WUNLOCK(tp->t_inpcb);
126
127 return (tp);
128 }
129
130 struct tcpcb *
131 tcp_offload_drop(struct tcpcb *tp, int error)
132 {
133
134 INP_INFO_WLOCK(&tcbinfo);
135 INP_WLOCK(tp->t_inpcb);
136 tp = tcp_drop(tp, error);
137 INP_INFO_WUNLOCK(&tcbinfo);
138 if (tp)
139 INP_WUNLOCK(tp->t_inpcb);
140
141 return (tp);
142 }
143
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