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-rw-r--r--include/linux/pkt_sched.h48
-rw-r--r--net/sched/sch_gred.c100
2 files changed, 53 insertions, 95 deletions
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 60ffcb9..d053add 100644
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -194,38 +194,34 @@ enum
#define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
-#define TCA_SET_OFF TCA_GRED_PARMS
struct tc_gred_qopt
{
- __u32 limit; /* HARD maximal queue length (bytes)
-*/
- __u32 qth_min; /* Min average length threshold (bytes)
-*/
- __u32 qth_max; /* Max average length threshold (bytes)
-*/
- __u32 DP; /* upto 2^32 DPs */
- __u32 backlog;
- __u32 qave;
- __u32 forced;
- __u32 early;
- __u32 other;
- __u32 pdrop;
-
- unsigned char Wlog; /* log(W) */
- unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
- unsigned char Scell_log; /* cell size for idle damping */
- __u8 prio; /* prio of this VQ */
- __u32 packets;
- __u32 bytesin;
+ __u32 limit; /* HARD maximal queue length (bytes) */
+ __u32 qth_min; /* Min average length threshold (bytes) */
+ __u32 qth_max; /* Max average length threshold (bytes) */
+ __u32 DP; /* upto 2^32 DPs */
+ __u32 backlog;
+ __u32 qave;
+ __u32 forced;
+ __u32 early;
+ __u32 other;
+ __u32 pdrop;
+ __u8 Wlog; /* log(W) */
+ __u8 Plog; /* log(P_max/(qth_max-qth_min)) */
+ __u8 Scell_log; /* cell size for idle damping */
+ __u8 prio; /* prio of this VQ */
+ __u32 packets;
+ __u32 bytesin;
};
+
/* gred setup */
struct tc_gred_sopt
{
- __u32 DPs;
- __u32 def_DP;
- __u8 grio;
- __u8 pad1;
- __u16 pad2;
+ __u32 DPs;
+ __u32 def_DP;
+ __u8 grio;
+ __u8 pad1;
+ __u16 pad2;
};
/* HTB section */
diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c
index 897e6df..1fb34be 100644
--- a/net/sched/sch_gred.c
+++ b/net/sched/sch_gred.c
@@ -15,50 +15,18 @@
* from Ren Liu
* - More error checks
*
- *
- *
- * For all the glorious comments look at Alexey's sch_red.c
+ * For all the glorious comments look at include/net/red.h
*/
#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>
#include <net/red.h>
-#if 1 /* control */
-#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
-#else
-#define DPRINTK(format,args...)
-#endif
-
-#if 0 /* data */
-#define D2PRINTK(format,args...) printk(KERN_DEBUG format,##args)
-#else
-#define D2PRINTK(format,args...)
-#endif
-
#define GRED_DEF_PRIO (MAX_DPs / 2)
#define GRED_VQ_MASK (MAX_DPs - 1)
@@ -72,7 +40,7 @@ struct gred_sched_data
u32 bytesin; /* bytes seen on virtualQ so far*/
u32 packetsin; /* packets seen on virtualQ so far*/
u32 backlog; /* bytes on the virtualQ */
- u8 prio; /* the prio of this vq */
+ u8 prio; /* the prio of this vq */
struct red_parms parms;
struct red_stats stats;
@@ -87,8 +55,8 @@ struct gred_sched
{
struct gred_sched_data *tab[MAX_DPs];
unsigned long flags;
- u32 DPs;
- u32 def;
+ u32 DPs;
+ u32 def;
struct red_parms wred_set;
};
@@ -172,13 +140,11 @@ static inline void gred_store_wred_set(struct gred_sched *table,
table->wred_set.qavg = q->parms.qavg;
}
-static int
-gred_enqueue(struct sk_buff *skb, struct Qdisc* sch)
+static int gred_enqueue(struct sk_buff *skb, struct Qdisc* sch)
{
struct gred_sched_data *q=NULL;
struct gred_sched *t= qdisc_priv(sch);
unsigned long qavg = 0;
- int i=0;
u16 dp = tc_index_to_dp(skb);
if (dp >= t->DPs || (q = t->tab[dp]) == NULL) {
@@ -200,26 +166,23 @@ gred_enqueue(struct sk_buff *skb, struct Qdisc* sch)
skb->tc_index = (skb->tc_index & ~GRED_VQ_MASK) | dp;
}
- /* sum up all the qaves of prios <= to ours to get the new qave*/
+ /* sum up all the qaves of prios <= to ours to get the new qave */
if (!gred_wred_mode(t) && gred_rio_mode(t)) {
- for (i=0;i<t->DPs;i++) {
- if ((!t->tab[i]) || (i==q->DP))
- continue;
-
- if (t->tab[i]->prio < q->prio &&
+ int i;
+
+ for (i = 0; i < t->DPs; i++) {
+ if (t->tab[i] && t->tab[i]->prio < q->prio &&
!red_is_idling(&t->tab[i]->parms))
qavg +=t->tab[i]->parms.qavg;
}
-
+
}
q->packetsin++;
- q->bytesin+=skb->len;
+ q->bytesin += skb->len;
- if (gred_wred_mode(t)) {
- qavg = 0;
+ if (gred_wred_mode(t))
gred_load_wred_set(t, q);
- }
q->parms.qavg = red_calc_qavg(&q->parms, gred_backlog(t, q, sch));
@@ -258,8 +221,7 @@ congestion_drop:
return NET_XMIT_CN;
}
-static int
-gred_requeue(struct sk_buff *skb, struct Qdisc* sch)
+static int gred_requeue(struct sk_buff *skb, struct Qdisc* sch)
{
struct gred_sched *t = qdisc_priv(sch);
struct gred_sched_data *q;
@@ -279,16 +241,15 @@ gred_requeue(struct sk_buff *skb, struct Qdisc* sch)
return qdisc_requeue(skb, sch);
}
-static struct sk_buff *
-gred_dequeue(struct Qdisc* sch)
+static struct sk_buff *gred_dequeue(struct Qdisc* sch)
{
struct sk_buff *skb;
- struct gred_sched_data *q;
- struct gred_sched *t= qdisc_priv(sch);
+ struct gred_sched *t = qdisc_priv(sch);
skb = qdisc_dequeue_head(sch);
if (skb) {
+ struct gred_sched_data *q;
u16 dp = tc_index_to_dp(skb);
if (dp >= t->DPs || (q = t->tab[dp]) == NULL) {
@@ -315,13 +276,12 @@ gred_dequeue(struct Qdisc* sch)
static unsigned int gred_drop(struct Qdisc* sch)
{
struct sk_buff *skb;
-
- struct gred_sched_data *q;
- struct gred_sched *t= qdisc_priv(sch);
+ struct gred_sched *t = qdisc_priv(sch);
skb = qdisc_dequeue_tail(sch);
if (skb) {
unsigned int len = skb->len;
+ struct gred_sched_data *q;
u16 dp = tc_index_to_dp(skb);
if (dp >= t->DPs || (q = t->tab[dp]) == NULL) {
@@ -351,15 +311,16 @@ static unsigned int gred_drop(struct Qdisc* sch)
static void gred_reset(struct Qdisc* sch)
{
int i;
- struct gred_sched_data *q;
- struct gred_sched *t= qdisc_priv(sch);
+ struct gred_sched *t = qdisc_priv(sch);
qdisc_reset_queue(sch);
- for (i=0;i<t->DPs;i++) {
- q= t->tab[i];
- if (!q)
- continue;
+ for (i = 0; i < t->DPs; i++) {
+ struct gred_sched_data *q = t->tab[i];
+
+ if (!q)
+ continue;
+
red_restart(&q->parms);
q->backlog = 0;
}
@@ -590,15 +551,13 @@ static void gred_destroy(struct Qdisc *sch)
struct gred_sched *table = qdisc_priv(sch);
int i;
- for (i = 0;i < table->DPs; i++) {
+ for (i = 0; i < table->DPs; i++) {
if (table->tab[i])
gred_destroy_vq(table->tab[i]);
}
}
static struct Qdisc_ops gred_qdisc_ops = {
- .next = NULL,
- .cl_ops = NULL,
.id = "gred",
.priv_size = sizeof(struct gred_sched),
.enqueue = gred_enqueue,
@@ -617,10 +576,13 @@ static int __init gred_module_init(void)
{
return register_qdisc(&gred_qdisc_ops);
}
-static void __exit gred_module_exit(void)
+
+static void __exit gred_module_exit(void)
{
unregister_qdisc(&gred_qdisc_ops);
}
+
module_init(gred_module_init)
module_exit(gred_module_exit)
+
MODULE_LICENSE("GPL");
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