Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / net / sched / sch_fifo.c

diff --git a/net/sched/sch_fifo.c b/net/sched/sch_fifo.c
index 4888305..033083b 100644 (file)
--- a/net/sched/sch_fifo.c
+++ b/net/sched/sch_fifo.c
@@ -11,131 +11,38 @@
 
 #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);
 
-       if (sch->qstats.backlog + skb->len <= q->limit) {
-               __skb_queue_tail(&sch->q, skb);
-               sch->qstats.backlog += skb->len;
-               sch->bstats.bytes += skb->len;
-               sch->bstats.packets++;
-               return 0;
-       }
-       sch->qstats.drops++;
-#ifdef CONFIG_NET_CLS_POLICE
-       if (sch->reshape_fail==NULL || sch->reshape_fail(skb, sch))
-#endif
-               kfree_skb(skb);
-       return NET_XMIT_DROP;
-}
-
-static int
-bfifo_requeue(struct sk_buff *skb, struct Qdisc* sch)
-{
-       __skb_queue_head(&sch->q, skb);
-       sch->qstats.backlog += skb->len;
-       sch->qstats.requeues++;
-       return 0;
-}
-
-static struct sk_buff *
-bfifo_dequeue(struct Qdisc* sch)
-{
-       struct sk_buff *skb;
+       if (likely(sch->qstats.backlog + skb->len <= q->limit))
+               return qdisc_enqueue_tail(skb, sch);
 
-       skb = __skb_dequeue(&sch->q);
-       if (skb)
-               sch->qstats.backlog -= skb->len;
-       return skb;
+       return qdisc_reshape_fail(skb, sch);
 }
 
-static unsigned int 
-fifo_drop(struct Qdisc* sch)
-{
-       struct sk_buff *skb;
-
-       skb = __skb_dequeue_tail(&sch->q);
-       if (skb) {
-               unsigned int len = skb->len;
-               sch->qstats.backlog -= len;
-               kfree_skb(skb);
-               return len;
-       }
-       return 0;
-}
-
-static void
-fifo_reset(struct Qdisc* sch)
-{
-       skb_queue_purge(&sch->q);
-       sch->qstats.backlog = 0;
-}
-
-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);
 
-       if (sch->q.qlen < q->limit) {
-               __skb_queue_tail(&sch->q, skb);
-               sch->bstats.bytes += skb->len;
-               sch->bstats.packets++;
-               return 0;
-       }
-       sch->qstats.drops++;
-#ifdef CONFIG_NET_CLS_POLICE
-       if (sch->reshape_fail==NULL || sch->reshape_fail(skb, sch))
-#endif
-               kfree_skb(skb);
-       return NET_XMIT_DROP;
-}
-
-static int
-pfifo_requeue(struct sk_buff *skb, struct Qdisc* sch)
-{
-       __skb_queue_head(&sch->q, skb);
-       sch->qstats.requeues++;
-       return 0;
-}
-
+       if (likely(skb_queue_len(&sch->q) < q->limit))
+               return qdisc_enqueue_tail(skb, sch);
 
-static struct sk_buff *
-pfifo_dequeue(struct Qdisc* sch)
-{
-       return __skb_dequeue(&sch->q);
+       return qdisc_reshape_fail(skb, sch);
 }
 
 static int fifo_init(struct Qdisc *sch, struct rtattr *opt)
@@ -143,66 +50,59 @@ 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,
-       .dequeue        =       pfifo_dequeue,
-       .requeue        =       pfifo_requeue,
-       .drop           =       fifo_drop,
+       .dequeue        =       qdisc_dequeue_head,
+       .requeue        =       qdisc_requeue,
+       .drop           =       qdisc_queue_drop,
        .init           =       fifo_init,
-       .reset          =       fifo_reset,
-       .destroy        =       NULL,
+       .reset          =       qdisc_reset_queue,
        .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,
-       .dequeue        =       bfifo_dequeue,
-       .requeue        =       bfifo_requeue,
-       .drop           =       fifo_drop,
+       .dequeue        =       qdisc_dequeue_head,
+       .requeue        =       qdisc_requeue,
+       .drop           =       qdisc_queue_drop,
        .init           =       fifo_init,
-       .reset          =       fifo_reset,
-       .destroy        =       NULL,
+       .reset          =       qdisc_reset_queue,
        .change         =       fifo_init,
        .dump           =       fifo_dump,
        .owner          =       THIS_MODULE,