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