X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=dummynet2%2Fdn_sched_fifo.c;fp=dummynet2%2Fdn_sched_fifo.c;h=d7d923e82b723fbb0a119a1f322f2a24549f249b;hb=40445faa1db58b90083115bc315d095e7eb2fe51;hp=0000000000000000000000000000000000000000;hpb=fccf30d4bf6b00b317756a9ff9d2135b361d2599;p=ipfw.git

diff --git a/dummynet2/dn_sched_fifo.c b/dummynet2/dn_sched_fifo.c
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+++ b/dummynet2/dn_sched_fifo.c
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+/*
+ * 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.
+ */
+
+/*
+ * $Id: dn_sched_fifo.c 5621 2010-03-04 16:51:27Z luigi $
+ */
+
+#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 <netinet/ipfw/dn_heap.h>
+#include <netinet/ipfw/ip_dn_private.h>
+#include <netinet/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);