sys/net/agr/ieee8023ad_lacp_sm_ptx.c

   1 /*      $NetBSD: ieee8023ad_lacp_sm_ptx.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_ptx.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
  37 #include <net/if.h>
  38 #include <net/if_ether.h>
  39
  40 #include <net/agr/ieee8023_slowprotocols.h>
  41 #include <net/agr/ieee8023_tlv.h>
  42 #include <net/agr/ieee8023ad_lacp.h>
  43 #include <net/agr/ieee8023ad_lacp_impl.h>
  44 #include <net/agr/ieee8023ad_lacp_sm.h>
  45 #include <net/agr/ieee8023ad_lacp_debug.h>
  46
  47 /* periodic transmit machine */
  48
  49 void
  50 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
  51 {
  52
  53         if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
  54             LACP_STATE_TIMEOUT)) {
  55                 return;
  56         }
  57
  58         LACP_DPRINTF((lp, "partner timeout changed\n"));
  59
  60         /*
  61          * FAST_PERIODIC -> SLOW_PERIODIC
  62          * or
  63          * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
  64          *
  65          * let lacp_sm_ptx_tx_schedule to update timeout.
  66          */
  67
  68         LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
  69
  70         /*
  71          * if timeout has been shortened, assert NTT.
  72          */
  73
  74         if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
  75                 lacp_sm_assert_ntt(lp);
  76         }
  77 }
  78
  79 void
  80 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
  81 {
  82         int timeout;
  83
  84         if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
  85             !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
  86
  87                 /*
  88                  * NO_PERIODIC
  89                  */
  90
  91                 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
  92                 return;
  93         }
  94
  95         if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
  96                 return;
  97         }
  98
  99         timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
 100             LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
 101
 102         LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
 103 }
 104
 105 void
 106 lacp_sm_ptx_timer(struct lacp_port *lp)
 107 {
 108
 109         lacp_sm_assert_ntt(lp);
 110 }