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[PKT_SCHED]: Logic simplifications and codingstyle/whitespace cleanups

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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 22:53:29 -07:00 committed by David S. Miller
parent 02f23f095f
commit af0d114176
1 changed files with 88 additions and 86 deletions
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174
net/sched/sch_dsmark.c
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@ -31,7 +31,7 @@
#endif #endif
#define PRIV(sch) qdisc_priv(sch) #define PRIV(sch) ((struct dsmark_qdisc_data *) qdisc_priv(sch))
/* /*
@ -55,10 +55,10 @@
struct dsmark_qdisc_data { struct dsmark_qdisc_data {
struct Qdisc *q; struct Qdisc *q;
struct tcf_proto *filter_list; struct tcf_proto *filter_list;
__u8 *mask; /* "owns" the array */ u8 *mask; /* "owns" the array */
__u8 *value; u8 *value;
__u16 indices; u16 indices;
__u32 default_index; /* index range is 0...0xffff */ u32 default_index; /* index range is 0...0xffff */
int set_tc_index; int set_tc_index;
}; };
@ -80,14 +80,13 @@ static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index)
/* ------------------------- Class/flow operations ------------------------- */ /* ------------------------- Class/flow operations ------------------------- */
static int dsmark_graft(struct Qdisc *sch, unsigned long arg,
static int dsmark_graft(struct Qdisc *sch,unsigned long arg, struct Qdisc *new, struct Qdisc **old)
struct Qdisc *new,struct Qdisc **old)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
DPRINTK("dsmark_graft(sch %p,[qdisc %p],new %p,old %p)\n",sch,p,new, DPRINTK("dsmark_graft(sch %p,[qdisc %p],new %p,old %p)\n",
old); sch, p, new, old);
if (new == NULL) { if (new == NULL) {
new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops); new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops);
@ -96,44 +95,37 @@ static int dsmark_graft(struct Qdisc *sch,unsigned long arg,
} }
sch_tree_lock(sch); sch_tree_lock(sch);
*old = xchg(&p->q,new); *old = xchg(&p->q, new);
if (*old) qdisc_reset(*old);
qdisc_reset(*old);
sch->q.qlen = 0; sch->q.qlen = 0;
sch_tree_unlock(sch); /* @@@ move up ? */ sch_tree_unlock(sch);
return 0; return 0;
} }
static struct Qdisc *dsmark_leaf(struct Qdisc *sch, unsigned long arg) static struct Qdisc *dsmark_leaf(struct Qdisc *sch, unsigned long arg)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); return PRIV(sch)->q;
return p->q;
} }
static unsigned long dsmark_get(struct Qdisc *sch, u32 classid)
static unsigned long dsmark_get(struct Qdisc *sch,u32 classid)
{ {
struct dsmark_qdisc_data *p __attribute__((unused)) = PRIV(sch); DPRINTK("dsmark_get(sch %p,[qdisc %p],classid %x)\n",
sch, PRIV(sch), classid);
DPRINTK("dsmark_get(sch %p,[qdisc %p],classid %x)\n",sch,p,classid); return TC_H_MIN(classid) + 1;
return TC_H_MIN(classid)+1;
} }
static unsigned long dsmark_bind_filter(struct Qdisc *sch, static unsigned long dsmark_bind_filter(struct Qdisc *sch,
unsigned long parent, u32 classid) unsigned long parent, u32 classid)
{ {
return dsmark_get(sch,classid); return dsmark_get(sch, classid);
} }
static void dsmark_put(struct Qdisc *sch, unsigned long cl) static void dsmark_put(struct Qdisc *sch, unsigned long cl)
{ {
} }
static int dsmark_change(struct Qdisc *sch, u32 classid, u32 parent, static int dsmark_change(struct Qdisc *sch, u32 classid, u32 parent,
struct rtattr **tca, unsigned long *arg) struct rtattr **tca, unsigned long *arg)
{ {
@ -169,26 +161,29 @@ rtattr_failure:
return err; return err;
} }
static int dsmark_delete(struct Qdisc *sch,unsigned long arg) static int dsmark_delete(struct Qdisc *sch, unsigned long arg)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
if (!arg || arg > p->indices) if (!dsmark_valid_index(p, arg))
return -EINVAL; return -EINVAL;
p->mask[arg-1] = 0xff; p->mask[arg-1] = 0xff;
p->value[arg-1] = 0; p->value[arg-1] = 0;
return 0; return 0;
} }
static void dsmark_walk(struct Qdisc *sch,struct qdisc_walker *walker) static void dsmark_walk(struct Qdisc *sch,struct qdisc_walker *walker)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
int i; int i;
DPRINTK("dsmark_walk(sch %p,[qdisc %p],walker %p)\n",sch,p,walker); DPRINTK("dsmark_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
if (walker->stop) if (walker->stop)
return; return;
for (i = 0; i < p->indices; i++) { for (i = 0; i < p->indices; i++) {
if (p->mask[i] == 0xff && !p->value[i]) if (p->mask[i] == 0xff && !p->value[i])
goto ignore; goto ignore;
@ -203,26 +198,20 @@ ignore:
} }
} }
static struct tcf_proto **dsmark_find_tcf(struct Qdisc *sch,unsigned long cl) static struct tcf_proto **dsmark_find_tcf(struct Qdisc *sch,unsigned long cl)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); return &PRIV(sch)->filter_list;
return &p->filter_list;
} }
/* --------------------------- Qdisc operations ---------------------------- */ /* --------------------------- Qdisc operations ---------------------------- */
static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch) static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
struct tcf_result res; int err;
int result;
int ret = NET_XMIT_POLICED; D2PRINTK("dsmark_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
D2PRINTK("dsmark_enqueue(skb %p,sch %p,[qdisc %p])\n",skb,sch,p);
if (p->set_tc_index) { if (p->set_tc_index) {
/* FIXME: Safe with non-linear skbs? --RR */ /* FIXME: Safe with non-linear skbs? --RR */
switch (skb->protocol) { switch (skb->protocol) {
@ -239,17 +228,21 @@ static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch)
break; break;
}; };
} }
result = TC_POLICE_OK; /* be nice to gcc */
if (TC_H_MAJ(skb->priority) == sch->handle) { if (TC_H_MAJ(skb->priority) == sch->handle)
skb->tc_index = TC_H_MIN(skb->priority); skb->tc_index = TC_H_MIN(skb->priority);
} else { else {
result = tc_classify(skb,p->filter_list,&res); struct tcf_result res;
D2PRINTK("result %d class 0x%04x\n",result,res.classid); int result = tc_classify(skb, p->filter_list, &res);
D2PRINTK("result %d class 0x%04x\n", result, res.classid);
switch (result) { switch (result) {
#ifdef CONFIG_NET_CLS_POLICE #ifdef CONFIG_NET_CLS_POLICE
case TC_POLICE_SHOT: case TC_POLICE_SHOT:
kfree_skb(skb); kfree_skb(skb);
break; sch->qstats.drops++;
return NET_XMIT_POLICED;
#if 0 #if 0
case TC_POLICE_RECLASSIFY: case TC_POLICE_RECLASSIFY:
/* FIXME: what to do here ??? */ /* FIXME: what to do here ??? */
@ -266,43 +259,45 @@ static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch)
break; break;
}; };
} }
if (
#ifdef CONFIG_NET_CLS_POLICE
result == TC_POLICE_SHOT ||
#endif
((ret = p->q->enqueue(skb,p->q)) != 0)) { err = p->q->enqueue(skb,p->q);
if (err != NET_XMIT_SUCCESS) {
sch->qstats.drops++; sch->qstats.drops++;
return ret; return err;
} }
sch->bstats.bytes += skb->len; sch->bstats.bytes += skb->len;
sch->bstats.packets++; sch->bstats.packets++;
sch->q.qlen++; sch->q.qlen++;
return ret;
}
return NET_XMIT_SUCCESS;
}
static struct sk_buff *dsmark_dequeue(struct Qdisc *sch) static struct sk_buff *dsmark_dequeue(struct Qdisc *sch)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
struct sk_buff *skb; struct sk_buff *skb;
int index; u32 index;
D2PRINTK("dsmark_dequeue(sch %p,[qdisc %p])\n", sch, p);
D2PRINTK("dsmark_dequeue(sch %p,[qdisc %p])\n",sch,p);
skb = p->q->ops->dequeue(p->q); skb = p->q->ops->dequeue(p->q);
if (!skb) if (skb == NULL)
return NULL; return NULL;
sch->q.qlen--; sch->q.qlen--;
index = skb->tc_index & (p->indices-1);
D2PRINTK("index %d->%d\n",skb->tc_index,index); index = skb->tc_index & (p->indices - 1);
D2PRINTK("index %d->%d\n", skb->tc_index, index);
switch (skb->protocol) { switch (skb->protocol) {
case __constant_htons(ETH_P_IP): case __constant_htons(ETH_P_IP):
ipv4_change_dsfield(skb->nh.iph, ipv4_change_dsfield(skb->nh.iph, p->mask[index],
p->mask[index],p->value[index]); p->value[index]);
break; break;
case __constant_htons(ETH_P_IPV6): case __constant_htons(ETH_P_IPV6):
ipv6_change_dsfield(skb->nh.ipv6h, ipv6_change_dsfield(skb->nh.ipv6h, p->mask[index],
p->mask[index],p->value[index]); p->value[index]);
break; break;
default: default:
/* /*
@ -316,41 +311,46 @@ static struct sk_buff *dsmark_dequeue(struct Qdisc *sch)
htons(skb->protocol)); htons(skb->protocol));
break; break;
}; };
return skb; return skb;
} }
static int dsmark_requeue(struct sk_buff *skb,struct Qdisc *sch) static int dsmark_requeue(struct sk_buff *skb,struct Qdisc *sch)
{ {
int ret;
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
int err;
D2PRINTK("dsmark_requeue(skb %p,sch %p,[qdisc %p])\n",skb,sch,p); D2PRINTK("dsmark_requeue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
if ((ret = p->q->ops->requeue(skb, p->q)) == 0) {
sch->q.qlen++; err = p->q->ops->requeue(skb, p->q);
sch->qstats.requeues++; if (err != NET_XMIT_SUCCESS) {
return 0; sch->qstats.drops++;
return err;
} }
sch->qstats.drops++;
return ret;
}
sch->q.qlen++;
sch->qstats.requeues++;
return NET_XMIT_SUCCESS;
}
static unsigned int dsmark_drop(struct Qdisc *sch) static unsigned int dsmark_drop(struct Qdisc *sch)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
unsigned int len; unsigned int len;
DPRINTK("dsmark_reset(sch %p,[qdisc %p])\n",sch,p); DPRINTK("dsmark_reset(sch %p,[qdisc %p])\n", sch, p);
if (!p->q->ops->drop)
if (p->q->ops->drop == NULL)
return 0; return 0;
if (!(len = p->q->ops->drop(p->q)))
return 0; len = p->q->ops->drop(p->q);
sch->q.qlen--; if (len)
sch->q.qlen--;
return len; return len;
} }
static int dsmark_init(struct Qdisc *sch, struct rtattr *opt) static int dsmark_init(struct Qdisc *sch, struct rtattr *opt)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
@ -400,33 +400,32 @@ rtattr_failure:
return err; return err;
} }
static void dsmark_reset(struct Qdisc *sch) static void dsmark_reset(struct Qdisc *sch)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
DPRINTK("dsmark_reset(sch %p,[qdisc %p])\n",sch,p); DPRINTK("dsmark_reset(sch %p,[qdisc %p])\n", sch, p);
qdisc_reset(p->q); qdisc_reset(p->q);
sch->q.qlen = 0; sch->q.qlen = 0;
} }
static void dsmark_destroy(struct Qdisc *sch) static void dsmark_destroy(struct Qdisc *sch)
{ {
struct dsmark_qdisc_data *p = PRIV(sch); struct dsmark_qdisc_data *p = PRIV(sch);
struct tcf_proto *tp; struct tcf_proto *tp;
DPRINTK("dsmark_destroy(sch %p,[qdisc %p])\n",sch,p); DPRINTK("dsmark_destroy(sch %p,[qdisc %p])\n", sch, p);
while (p->filter_list) { while (p->filter_list) {
tp = p->filter_list; tp = p->filter_list;
p->filter_list = tp->next; p->filter_list = tp->next;
tcf_destroy(tp); tcf_destroy(tp);
} }
qdisc_destroy(p->q); qdisc_destroy(p->q);
kfree(p->mask); kfree(p->mask);
} }
static int dsmark_dump_class(struct Qdisc *sch, unsigned long cl, static int dsmark_dump_class(struct Qdisc *sch, unsigned long cl,
struct sk_buff *skb, struct tcmsg *tcm) struct sk_buff *skb, struct tcmsg *tcm)
{ {
@ -505,10 +504,13 @@ static int __init dsmark_module_init(void)
{ {
return register_qdisc(&dsmark_qdisc_ops); return register_qdisc(&dsmark_qdisc_ops);
} }
static void __exit dsmark_module_exit(void) static void __exit dsmark_module_exit(void)
{ {
unregister_qdisc(&dsmark_qdisc_ops); unregister_qdisc(&dsmark_qdisc_ops);
} }
module_init(dsmark_module_init) module_init(dsmark_module_init)
module_exit(dsmark_module_exit) module_exit(dsmark_module_exit)
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");