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LU-7734 lnet: fix routing selection
[fs/lustre-release.git] / lnet / lnet / lo.c
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13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
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17  * version 2 along with this program; If not, see
18  * http://www.gnu.org/licenses/gpl-2.0.html
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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 <lnet/lib-lnet.h>
33
34 static int
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
44 lolnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
45             int delayed, unsigned int niov,
46             struct kvec *iov, lnet_kiov_t *kiov,
47             unsigned int offset, unsigned int mlen, unsigned int rlen)
48 {
49         lnet_msg_t *sendmsg = private;
50
51         if (lntmsg != NULL) {                   /* not discarding */
52                 if (sendmsg->msg_iov != NULL) {
53                         if (iov != NULL)
54                                 lnet_copy_iov2iov(niov, iov, offset,
55                                                   sendmsg->msg_niov,
56                                                   sendmsg->msg_iov,
57                                                   sendmsg->msg_offset, mlen);
58                         else
59                                 lnet_copy_iov2kiov(niov, kiov, offset,
60                                                    sendmsg->msg_niov,
61                                                    sendmsg->msg_iov,
62                                                    sendmsg->msg_offset, mlen);
63                 } else {
64                         if (iov != NULL)
65                                 lnet_copy_kiov2iov(niov, iov, offset,
66                                                    sendmsg->msg_niov,
67                                                    sendmsg->msg_kiov,
68                                                    sendmsg->msg_offset, mlen);
69                         else
70                                 lnet_copy_kiov2kiov(niov, kiov, offset,
71                                                     sendmsg->msg_niov,
72                                                     sendmsg->msg_kiov,
73                                                     sendmsg->msg_offset, mlen);
74                 }
75
76                 lnet_finalize(ni, lntmsg, 0);
77         }
78
79         lnet_finalize(ni, sendmsg, 0);
80         return 0;
81 }
82
83 static int lolnd_instanced;
84
85 static void
86 lolnd_shutdown(lnet_ni_t *ni)
87 {
88         CDEBUG (D_NET, "shutdown\n");
89         LASSERT(lolnd_instanced);
90
91         lolnd_instanced = 0;
92 }
93
94 static int
95 lolnd_startup (lnet_ni_t *ni)
96 {
97         LASSERT (ni->ni_net->net_lnd == &the_lolnd);
98         LASSERT (!lolnd_instanced);
99         lolnd_instanced = 1;
100
101         return (0);
102 }
103
104 lnd_t the_lolnd = {
105         /* .lnd_list       = */ {&the_lolnd.lnd_list, &the_lolnd.lnd_list},
106         /* .lnd_refcount   = */ 0,
107         /* .lnd_type       = */ LOLND,
108         /* .lnd_startup    = */ lolnd_startup,
109         /* .lnd_shutdown   = */ lolnd_shutdown,
110         /* .lnt_ctl        = */ NULL,
111         /* .lnd_send       = */ lolnd_send,
112         /* .lnd_recv       = */ lolnd_recv,
113         /* .lnd_eager_recv = */ NULL,
114         /* .lnd_notify     = */ NULL,
115         /* .lnd_accept     = */ NULL
116 };