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.gnu.org/licenses/gpl-2.0.html
19 *
20 * GPL HEADER END
21 */
22 /*
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
25 */
26 /*
27 * This file is part of Lustre, http://www.lustre.org/
28 * Lustre is a trademark of Sun Microsystems, Inc.
29 */
30
31 #define DEBUG_SUBSYSTEM S_LNET
32 #include "../../include/linux/lnet/lib-lnet.h"
33
34 static int
lolnd_send(lnet_ni_t * ni,void * private,lnet_msg_t * lntmsg)35 lolnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
36 {
37 LASSERT(!lntmsg->msg_routing);
38 LASSERT(!lntmsg->msg_target_is_router);
39
40 return lnet_parse(ni, &lntmsg->msg_hdr, ni->ni_nid, lntmsg, 0);
41 }
42
43 static int
lolnd_recv(lnet_ni_t * ni,void * private,lnet_msg_t * lntmsg,int delayed,struct iov_iter * to,unsigned int rlen)44 lolnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
45 int delayed, struct iov_iter *to, unsigned int rlen)
46 {
47 lnet_msg_t *sendmsg = private;
48
49 if (lntmsg) { /* not discarding */
50 if (sendmsg->msg_iov)
51 lnet_copy_iov2iter(to,
52 sendmsg->msg_niov,
53 sendmsg->msg_iov,
54 sendmsg->msg_offset,
55 iov_iter_count(to));
56 else
57 lnet_copy_kiov2iter(to,
58 sendmsg->msg_niov,
59 sendmsg->msg_kiov,
60 sendmsg->msg_offset,
61 iov_iter_count(to));
62
63 lnet_finalize(ni, lntmsg, 0);
64 }
65
66 lnet_finalize(ni, sendmsg, 0);
67 return 0;
68 }
69
70 static int lolnd_instanced;
71
72 static void
lolnd_shutdown(lnet_ni_t * ni)73 lolnd_shutdown(lnet_ni_t *ni)
74 {
75 CDEBUG(D_NET, "shutdown\n");
76 LASSERT(lolnd_instanced);
77
78 lolnd_instanced = 0;
79 }
80
81 static int
lolnd_startup(lnet_ni_t * ni)82 lolnd_startup(lnet_ni_t *ni)
83 {
84 LASSERT(ni->ni_lnd == &the_lolnd);
85 LASSERT(!lolnd_instanced);
86 lolnd_instanced = 1;
87
88 return 0;
89 }
90
91 lnd_t the_lolnd = {
92 /* .lnd_list = */ {&the_lolnd.lnd_list, &the_lolnd.lnd_list},
93 /* .lnd_refcount = */ 0,
94 /* .lnd_type = */ LOLND,
95 /* .lnd_startup = */ lolnd_startup,
96 /* .lnd_shutdown = */ lolnd_shutdown,
97 /* .lnt_ctl = */ NULL,
98 /* .lnd_send = */ lolnd_send,
99 /* .lnd_recv = */ lolnd_recv,
100 /* .lnd_eager_recv = */ NULL,
101 /* .lnd_notify = */ NULL,
102 /* .lnd_accept = */ NULL
103 };
104