122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/*
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* Copyright (c) 2010 Riccardo Panicucci, Universita` di Pisa
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* All rights reserved
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* $FreeBSD$
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*/
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#ifdef _KERNEL
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#include <sys/malloc.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/kernel.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <net/if.h> /* IFNAMSIZ */
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#include <netinet/in.h>
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#include <netinet/ip_var.h> /* ipfw_rule_ref */
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#include <netinet/ip_fw.h> /* flow_id */
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#include <netinet/ip_dummynet.h>
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#include <netpfil/ipfw/dn_heap.h>
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#include <netpfil/ipfw/ip_dn_private.h>
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#include <netpfil/ipfw/dn_sched.h>
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#else
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#include <dn_test.h>
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#endif
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/*
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* This file implements a FIFO scheduler for a single queue.
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* The queue is allocated as part of the scheduler instance,
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* and there is a single flowset is in the template which stores
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* queue size and policy.
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* Enqueue and dequeue use the default library functions.
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*/
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static int
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fifo_enqueue(struct dn_sch_inst *si, struct dn_queue *q, struct mbuf *m)
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{
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/* XXX if called with q != NULL and m=NULL, this is a
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* re-enqueue from an existing scheduler, which we should
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* handle.
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*/
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(void)q;
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return dn_enqueue((struct dn_queue *)(si+1), m, 0);
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}
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static struct mbuf *
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fifo_dequeue(struct dn_sch_inst *si)
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{
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return dn_dequeue((struct dn_queue *)(si + 1));
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}
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static int
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fifo_new_sched(struct dn_sch_inst *si)
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{
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/* This scheduler instance contains the queue */
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struct dn_queue *q = (struct dn_queue *)(si + 1);
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set_oid(&q->ni.oid, DN_QUEUE, sizeof(*q));
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q->_si = si;
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q->fs = si->sched->fs;
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return 0;
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}
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static int
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fifo_free_sched(struct dn_sch_inst *si)
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{
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struct dn_queue *q = (struct dn_queue *)(si + 1);
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dn_free_pkts(q->mq.head);
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bzero(q, sizeof(*q));
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return 0;
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}
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/*
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* FIFO scheduler descriptor
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* contains the type of the scheduler, the name, the size of extra
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* data structures, and function pointers.
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*/
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static struct dn_alg fifo_desc = {
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_SI( .type = ) DN_SCHED_FIFO,
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_SI( .name = ) "FIFO",
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_SI( .flags = ) 0,
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_SI( .schk_datalen = ) 0,
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_SI( .si_datalen = ) sizeof(struct dn_queue),
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_SI( .q_datalen = ) 0,
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_SI( .enqueue = ) fifo_enqueue,
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_SI( .dequeue = ) fifo_dequeue,
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_SI( .config = ) NULL,
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_SI( .destroy = ) NULL,
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_SI( .new_sched = ) fifo_new_sched,
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_SI( .free_sched = ) fifo_free_sched,
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_SI( .new_fsk = ) NULL,
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_SI( .free_fsk = ) NULL,
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_SI( .new_queue = ) NULL,
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_SI( .free_queue = ) NULL,
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};
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DECLARE_DNSCHED_MODULE(dn_fifo, &fifo_desc);
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