The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/altq/altq_fifoq.h

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    1 /*      $NetBSD: altq_fifoq.h,v 1.7 2006/10/12 19:59:08 peter Exp $     */
    2 /*      $KAME: altq_fifoq.h,v 1.8 2002/11/29 04:36:23 kjc Exp $ */
    3 
    4 /*
    5  * Copyright (C) 1997-2002
    6  *      Sony Computer Science Laboratories Inc.  All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #ifndef _ALTQ_ALTQ_FIFOQ_H_
   31 #define _ALTQ_ALTQ_FIFOQ_H_
   32 
   33 #ifdef _KERNEL
   34 typedef struct fifoq_state {
   35         struct fifoq_state *q_next;     /* next fifoq_state in the list */
   36         struct ifaltq *q_ifq;           /* backpointer to ifaltq */
   37 
   38         struct mbuf *q_head;            /* head of queue */
   39         struct mbuf *q_tail;            /* tail of queue */
   40         int     q_len;                  /* queue length */
   41         int     q_limit;                /* max queue length */
   42 
   43         /* statistics */
   44         struct {
   45                 struct pktcntr  xmit_cnt;
   46                 struct pktcntr  drop_cnt;
   47                 u_int           period;
   48         } q_stats;
   49 } fifoq_state_t;
   50 #endif
   51 
   52 struct fifoq_interface {
   53         char    fifoq_ifname[IFNAMSIZ];
   54 };
   55 
   56 struct fifoq_getstats {
   57         struct fifoq_interface iface;
   58         int             q_len;
   59         int             q_limit;
   60         struct pktcntr  xmit_cnt;
   61         struct pktcntr  drop_cnt;
   62         u_int           period;
   63 };
   64 
   65 struct fifoq_conf {
   66         struct fifoq_interface iface;
   67         int fifoq_limit;
   68 };
   69 
   70 #define FIFOQ_LIMIT     50      /* default max queue length */
   71 
   72 /*
   73  * IOCTLs for FIFOQ
   74  */
   75 #define FIFOQ_IF_ATTACH         _IOW('Q', 1, struct fifoq_interface)
   76 #define FIFOQ_IF_DETACH         _IOW('Q', 2, struct fifoq_interface)
   77 #define FIFOQ_ENABLE            _IOW('Q', 3, struct fifoq_interface)
   78 #define FIFOQ_DISABLE           _IOW('Q', 4, struct fifoq_interface)
   79 #define FIFOQ_CONFIG            _IOWR('Q', 6, struct fifoq_conf)
   80 #define FIFOQ_GETSTATS          _IOWR('Q', 12, struct fifoq_getstats)
   81 
   82 #endif /* _ALTQ_ALTQ_FIFOQ_H_ */

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