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[PKT_SCHED]: Cleanup fifo qdisc and remove unnecessary code

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Removes the skb trimming code which is not needed since we never
touch the skb upon failure. Removes unnecessary includes,
initializers, and simplifies the code a bit.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2005-06-18 22:58:00 -07:00 committed by David S. Miller
parent aaae3013d1
commit 6fc8e84f4c
1 changed files with 12 additions and 38 deletions
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50
net/sched/sch_fifo.c
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@ -11,39 +11,21 @@
#include <linux/config.h>
#include <linux/module.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/in.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/if_ether.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/notifier.h>
#include <net/ip.h>
#include <net/route.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/pkt_sched.h>
/* 1 band FIFO pseudo-"scheduler" */
struct fifo_sched_data
{
unsigned limit;
u32 limit;
};
static int
bfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
static int bfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
{
struct fifo_sched_data *q = qdisc_priv(sch);
@ -53,8 +35,7 @@ bfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
return qdisc_reshape_fail(skb, sch);
}
static int
pfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
{
struct fifo_sched_data *q = qdisc_priv(sch);
@ -69,40 +50,37 @@ static int fifo_init(struct Qdisc *sch, struct rtattr *opt)
struct fifo_sched_data *q = qdisc_priv(sch);
if (opt == NULL) {
unsigned int limit = sch->dev->tx_queue_len ? : 1;
u32 limit = sch->dev->tx_queue_len ? : 1;
if (sch->ops == &bfifo_qdisc_ops)
q->limit = limit*sch->dev->mtu;
else
q->limit = limit;
limit *= sch->dev->mtu;
q->limit = limit;
} else {
struct tc_fifo_qopt *ctl = RTA_DATA(opt);
if (opt->rta_len < RTA_LENGTH(sizeof(*ctl)))
if (RTA_PAYLOAD(opt) < sizeof(*ctl))
return -EINVAL;
q->limit = ctl->limit;
}
return 0;
}
static int fifo_dump(struct Qdisc *sch, struct sk_buff *skb)
{
struct fifo_sched_data *q = qdisc_priv(sch);
unsigned char *b = skb->tail;
struct tc_fifo_qopt opt;
struct tc_fifo_qopt opt = { .limit = q->limit };
opt.limit = q->limit;
RTA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt);
return skb->len;
rtattr_failure:
skb_trim(skb, b - skb->data);
return -1;
}
struct Qdisc_ops pfifo_qdisc_ops = {
.next = NULL,
.cl_ops = NULL,
.id = "pfifo",
.priv_size = sizeof(struct fifo_sched_data),
.enqueue = pfifo_enqueue,
@ -111,15 +89,12 @@ struct Qdisc_ops pfifo_qdisc_ops = {
.drop = qdisc_queue_drop,
.init = fifo_init,
.reset = qdisc_reset_queue,
.destroy = NULL,
.change = fifo_init,
.dump = fifo_dump,
.owner = THIS_MODULE,
};
struct Qdisc_ops bfifo_qdisc_ops = {
.next = NULL,
.cl_ops = NULL,
.id = "bfifo",
.priv_size = sizeof(struct fifo_sched_data),
.enqueue = bfifo_enqueue,
@ -128,7 +103,6 @@ struct Qdisc_ops bfifo_qdisc_ops = {
.drop = qdisc_queue_drop,
.init = fifo_init,
.reset = qdisc_reset_queue,
.destroy = NULL,
.change = fifo_init,
.dump = fifo_dump,
.owner = THIS_MODULE,