1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 */
30 /*
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
33 */
34
35 #define DEBUG_SUBSYSTEM S_LNET
36 #include "../../include/linux/lnet/lib-lnet.h"
37
38 static int
lolnd_send(lnet_ni_t * ni,void * private,lnet_msg_t * lntmsg)39 lolnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
40 {
41 LASSERT(!lntmsg->msg_routing);
42 LASSERT(!lntmsg->msg_target_is_router);
43
44 return lnet_parse(ni, &lntmsg->msg_hdr, ni->ni_nid, lntmsg, 0);
45 }
46
47 static int
lolnd_recv(lnet_ni_t * ni,void * private,lnet_msg_t * lntmsg,int delayed,unsigned int niov,struct kvec * iov,lnet_kiov_t * kiov,unsigned int offset,unsigned int mlen,unsigned int rlen)48 lolnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
49 int delayed, unsigned int niov,
50 struct kvec *iov, lnet_kiov_t *kiov,
51 unsigned int offset, unsigned int mlen, unsigned int rlen)
52 {
53 lnet_msg_t *sendmsg = private;
54
55 if (lntmsg != NULL) { /* not discarding */
56 if (sendmsg->msg_iov != NULL) {
57 if (iov != NULL)
58 lnet_copy_iov2iov(niov, iov, offset,
59 sendmsg->msg_niov,
60 sendmsg->msg_iov,
61 sendmsg->msg_offset, mlen);
62 else
63 lnet_copy_iov2kiov(niov, kiov, offset,
64 sendmsg->msg_niov,
65 sendmsg->msg_iov,
66 sendmsg->msg_offset, mlen);
67 } else {
68 if (iov != NULL)
69 lnet_copy_kiov2iov(niov, iov, offset,
70 sendmsg->msg_niov,
71 sendmsg->msg_kiov,
72 sendmsg->msg_offset, mlen);
73 else
74 lnet_copy_kiov2kiov(niov, kiov, offset,
75 sendmsg->msg_niov,
76 sendmsg->msg_kiov,
77 sendmsg->msg_offset, mlen);
78 }
79
80 lnet_finalize(ni, lntmsg, 0);
81 }
82
83 lnet_finalize(ni, sendmsg, 0);
84 return 0;
85 }
86
87 static int lolnd_instanced;
88
89 static void
lolnd_shutdown(lnet_ni_t * ni)90 lolnd_shutdown(lnet_ni_t *ni)
91 {
92 CDEBUG(D_NET, "shutdown\n");
93 LASSERT(lolnd_instanced);
94
95 lolnd_instanced = 0;
96 }
97
98 static int
lolnd_startup(lnet_ni_t * ni)99 lolnd_startup(lnet_ni_t *ni)
100 {
101 LASSERT(ni->ni_lnd == &the_lolnd);
102 LASSERT(!lolnd_instanced);
103 lolnd_instanced = 1;
104
105 return 0;
106 }
107
108 lnd_t the_lolnd = {
109 /* .lnd_list = */ {&the_lolnd.lnd_list, &the_lolnd.lnd_list},
110 /* .lnd_refcount = */ 0,
111 /* .lnd_type = */ LOLND,
112 /* .lnd_startup = */ lolnd_startup,
113 /* .lnd_shutdown = */ lolnd_shutdown,
114 /* .lnt_ctl = */ NULL,
115 /* .lnd_send = */ lolnd_send,
116 /* .lnd_recv = */ lolnd_recv,
117 /* .lnd_eager_recv = */ NULL,
118 /* .lnd_notify = */ NULL,
119 /* .lnd_accept = */ NULL
120 };
121