diff options
Diffstat (limited to 'sys/netinet/ipfw/dn_sched_fifo.c')
-rw-r--r-- | sys/netinet/ipfw/dn_sched_fifo.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/sys/netinet/ipfw/dn_sched_fifo.c b/sys/netinet/ipfw/dn_sched_fifo.c new file mode 100644 index 0000000..0bb3800 --- /dev/null +++ b/sys/netinet/ipfw/dn_sched_fifo.c @@ -0,0 +1,120 @@ +/* + * 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 <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); |