lnet/lnet/lo.c

   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 <lnet/lib-lnet.h>
  37
  38 static int
  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
  48 lolnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
  49             int delayed, unsigned int niov,
  50             struct iovec *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
  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
  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 };