lnet/lnet/lo.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LNET
  38 #include <lnet/lib-lnet.h>
  39
  40 int
  41 lolnd_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
  42 {
  43         LASSERT (!lntmsg->msg_routing);
  44         LASSERT (!lntmsg->msg_target_is_router);
  45
  46         return lnet_parse(ni, &lntmsg->msg_hdr, ni->ni_nid, lntmsg, 0);
  47 }
  48
  49 int
  50 lolnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
  51             int delayed, unsigned int niov,
  52             struct iovec *iov, lnet_kiov_t *kiov,
  53             unsigned int offset, unsigned int mlen, unsigned int rlen)
  54 {
  55         lnet_msg_t *sendmsg = private;
  56
  57         if (lntmsg != NULL) {                   /* not discarding */
  58                 if (sendmsg->msg_iov != NULL) {
  59                         if (iov != NULL)
  60                                 lnet_copy_iov2iov(niov, iov, offset,
  61                                                   sendmsg->msg_niov,
  62                                                   sendmsg->msg_iov,
  63                                                   sendmsg->msg_offset, mlen);
  64                         else
  65                                 lnet_copy_iov2kiov(niov, kiov, offset,
  66                                                    sendmsg->msg_niov,
  67                                                    sendmsg->msg_iov,
  68                                                    sendmsg->msg_offset, mlen);
  69                 } else {
  70                         if (iov != NULL)
  71                                 lnet_copy_kiov2iov(niov, iov, offset,
  72                                                    sendmsg->msg_niov,
  73                                                    sendmsg->msg_kiov,
  74                                                    sendmsg->msg_offset, mlen);
  75                         else
  76                                 lnet_copy_kiov2kiov(niov, kiov, offset,
  77                                                     sendmsg->msg_niov,
  78                                                     sendmsg->msg_kiov,
  79                                                     sendmsg->msg_offset, mlen);
  80                 }
  81
  82                 lnet_finalize(ni, lntmsg, 0);
  83         }
  84
  85         lnet_finalize(ni, sendmsg, 0);
  86         return 0;
  87 }
  88
  89 static int lolnd_instanced;
  90
  91 void
  92 lolnd_shutdown(lnet_ni_t *ni)
  93 {
  94         CDEBUG (D_NET, "shutdown\n");
  95         LASSERT (lolnd_instanced);
  96
  97         lolnd_instanced = 0;
  98 }
  99
 100 int
 101 lolnd_startup (lnet_ni_t *ni)
 102 {
 103         LASSERT (ni->ni_lnd == &the_lolnd);
 104         LASSERT (!lolnd_instanced);
 105         lolnd_instanced = 1;
 106
 107         return (0);
 108 }
 109
 110 lnd_t the_lolnd = {
 111         /* .lnd_list       = */ {&the_lolnd.lnd_list, &the_lolnd.lnd_list},
 112         /* .lnd_refcount   = */ 0,
 113         /* .lnd_type       = */ LOLND,
 114         /* .lnd_startup    = */ lolnd_startup,
 115         /* .lnd_shutdown   = */ lolnd_shutdown,
 116         /* .lnt_ctl        = */ NULL,
 117         /* .lnd_send       = */ lolnd_send,
 118         /* .lnd_recv       = */ lolnd_recv,
 119         /* .lnd_eager_recv = */ NULL,
 120         /* .lnd_notify     = */ NULL,
 121 #ifdef __KERNEL__
 122         /* .lnd_accept     = */ NULL
 123 #else
 124         /* .lnd_wait       = */ NULL
 125 #endif
 126 };