sys/net/agr/ieee8023ad_lacp_sm_tx.c

   1 /*      $NetBSD: ieee8023ad_lacp_sm_tx.c,v 1.1.4.2 2005/11/10 14:10:50 skrll Exp $      */
   2
   3 /*-
   4  * Copyright (c)2005 YAMAMOTO Takashi,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD: ieee8023ad_lacp_sm_tx.c,v 1.1.4.2 2005/11/10 14:10:50 skrll Exp $");
  31
  32 #include <sys/param.h>
  33 #include <sys/callout.h>
  34 #include <sys/mbuf.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h> /* hardclock_ticks */
  37
  38 #include <net/if.h>
  39 #include <net/if_ether.h>
  40
  41 #include <net/agr/ieee8023_slowprotocols.h>
  42 #include <net/agr/ieee8023_tlv.h>
  43 #include <net/agr/ieee8023ad_lacp.h>
  44 #include <net/agr/ieee8023ad_lacp_impl.h>
  45 #include <net/agr/ieee8023ad_lacp_sm.h>
  46 #include <net/agr/ieee8023ad_lacp_debug.h>
  47
  48 /* transmit machine */
  49
  50 void
  51 lacp_sm_tx(struct lacp_port *lp)
  52 {
  53         int error;
  54         int now;
  55
  56         if (!(lp->lp_state & LACP_STATE_AGGREGATION)
  57 #if 1
  58             || (!(lp->lp_state & LACP_STATE_ACTIVITY)
  59             && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
  60 #endif
  61             ) {
  62                 lp->lp_flags &= ~LACPPORT_NTT;
  63         }
  64
  65         if (!(lp->lp_flags & LACPPORT_NTT)) {
  66                 return;
  67         }
  68
  69         /* rate limit */
  70         now = hardclock_ticks;
  71         if ((unsigned int)(now - lp->lp_last_lacpdu_sent) <=
  72             LACP_FAST_PERIODIC_TIME * hz / 3) {
  73                 return;
  74         }
  75         lp->lp_last_lacpdu_sent = now;
  76
  77         error = lacp_xmit_lacpdu(lp);
  78
  79         if (error == 0) {
  80                 lp->lp_flags &= ~LACPPORT_NTT;
  81         } else {
  82                 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
  83                     error));
  84         }
  85 }
  86
  87 void
  88 lacp_sm_assert_ntt(struct lacp_port *lp)
  89 {
  90
  91         lp->lp_flags |= LACPPORT_NTT;
  92 }