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