lnet/lnet/lo.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2004 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #define DEBUG_SUBSYSTEM S_LNET
  23 #include <lnet/lib-lnet.h>
  24
  25 int
  26 lolnd_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
  27 {
  28         LASSERT (!lntmsg->msg_routing);
  29         LASSERT (!lntmsg->msg_target_is_router);
  30
  31         return lnet_parse(ni, &lntmsg->msg_hdr, ni->ni_nid, lntmsg, 0);
  32 }
  33
  34 int
  35 lolnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
  36             int delayed, unsigned int niov,
  37             struct iovec *iov, lnet_kiov_t *kiov,
  38             unsigned int offset, unsigned int mlen, unsigned int rlen)
  39 {
  40         lnet_msg_t *sendmsg = private;
  41
  42         if (lntmsg != NULL) {                   /* not discarding */
  43                 if (sendmsg->msg_iov != NULL) {
  44                         if (iov != NULL)
  45                                 lnet_copy_iov2iov(niov, iov, offset,
  46                                                   sendmsg->msg_niov,
  47                                                   sendmsg->msg_iov,
  48                                                   sendmsg->msg_offset, mlen);
  49                         else
  50                                 lnet_copy_iov2kiov(niov, kiov, offset,
  51                                                    sendmsg->msg_niov,
  52                                                    sendmsg->msg_iov,
  53                                                    sendmsg->msg_offset, mlen);
  54                 } else {
  55                         if (iov != NULL)
  56                                 lnet_copy_kiov2iov(niov, iov, offset,
  57                                                    sendmsg->msg_niov,
  58                                                    sendmsg->msg_kiov,
  59                                                    sendmsg->msg_offset, mlen);
  60                         else
  61                                 lnet_copy_kiov2kiov(niov, kiov, offset,
  62                                                     sendmsg->msg_niov,
  63                                                     sendmsg->msg_kiov,
  64                                                     sendmsg->msg_offset, mlen);
  65                 }
  66
  67                 lnet_finalize(ni, lntmsg, 0);
  68         }
  69
  70         lnet_finalize(ni, sendmsg, 0);
  71         return 0;
  72 }
  73
  74 static int lolnd_instanced;
  75
  76 void
  77 lolnd_shutdown(lnet_ni_t *ni)
  78 {
  79         CDEBUG (D_NET, "shutdown\n");
  80         LASSERT (lolnd_instanced);
  81
  82         lolnd_instanced = 0;
  83 }
  84
  85 int
  86 lolnd_startup (lnet_ni_t *ni)
  87 {
  88         LASSERT (ni->ni_lnd == &the_lolnd);
  89         LASSERT (!lolnd_instanced);
  90         lolnd_instanced = 1;
  91
  92         return (0);
  93 }
  94
  95 lnd_t the_lolnd = {
  96         /* .lnd_list       = */ {&the_lolnd.lnd_list, &the_lolnd.lnd_list},
  97         /* .lnd_refcount   = */ 0,
  98         /* .lnd_type       = */ LOLND,
  99         /* .lnd_startup    = */ lolnd_startup,
 100         /* .lnd_shutdown   = */ lolnd_shutdown,
 101         /* .lnt_ctl        = */ NULL,
 102         /* .lnd_send       = */ lolnd_send,
 103         /* .lnd_recv       = */ lolnd_recv,
 104         /* .lnd_eager_recv = */ NULL,
 105         /* .lnd_notify     = */ NULL,
 106 #ifdef __KERNEL__
 107         /* .lnd_accept     = */ NULL
 108 #else
 109         /* .lnd_wait       = */ NULL
 110 #endif
 111 };
 112