78a6b08618
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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/lock.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/rwlock.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/ip_fw_private.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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#ifdef NEW_AQM
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#include <netpfil/ipfw/dn_aqm.h>
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#endif
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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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#ifdef NEW_AQM
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_SI( .getconfig = ) NULL,
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#endif
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};
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DECLARE_DNSCHED_MODULE(dn_fifo, &fifo_desc);
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