#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
-#include <linux/netfilter_ipv4.h>
-#include <linux/netfilter_ipv6.h>
-#include <linux/netfilter.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
-#undef DEBUG_INGRESS
-
-#ifdef DEBUG_INGRESS /* 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 PRIV(sch) qdisc_priv(sch)
-
-
-/* Thanks to Doron Oz for this hack
-*/
-#ifndef CONFIG_NET_CLS_ACT
-#ifdef CONFIG_NETFILTER
-static int nf_registered;
-#endif
-#endif
-
struct ingress_qdisc_data {
- struct Qdisc *q;
struct tcf_proto *filter_list;
};
-
/* ------------------------- Class/flow operations ------------------------- */
-
-static int ingress_graft(struct Qdisc *sch,unsigned long arg,
- struct Qdisc *new,struct Qdisc **old)
+static int ingress_graft(struct Qdisc *sch, unsigned long arg,
+ struct Qdisc *new, struct Qdisc **old)
{
-#ifdef DEBUG_INGRESS
- struct ingress_qdisc_data *p = PRIV(sch);
-#endif
-
- DPRINTK("ingress_graft(sch %p,[qdisc %p],new %p,old %p)\n",
- sch, p, new, old);
- DPRINTK("\n ingress_graft: You cannot add qdiscs to classes");
- return 1;
+ return -EOPNOTSUPP;
}
-
static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
{
return NULL;
}
-
-static unsigned long ingress_get(struct Qdisc *sch,u32 classid)
+static unsigned long ingress_get(struct Qdisc *sch, u32 classid)
{
-#ifdef DEBUG_INGRESS
- struct ingress_qdisc_data *p = PRIV(sch);
-#endif
- DPRINTK("ingress_get(sch %p,[qdisc %p],classid %x)\n", sch, p, classid);
return TC_H_MIN(classid) + 1;
}
-
static unsigned long ingress_bind_filter(struct Qdisc *sch,
- unsigned long parent, u32 classid)
+ unsigned long parent, u32 classid)
{
return ingress_get(sch, classid);
}
-
static void ingress_put(struct Qdisc *sch, unsigned long cl)
{
}
-
static int ingress_change(struct Qdisc *sch, u32 classid, u32 parent,
- struct rtattr **tca, unsigned long *arg)
+ struct nlattr **tca, unsigned long *arg)
{
-#ifdef DEBUG_INGRESS
- struct ingress_qdisc_data *p = PRIV(sch);
-#endif
- DPRINTK("ingress_change(sch %p,[qdisc %p],classid %x,parent %x),"
- "arg 0x%lx\n", sch, p, classid, parent, *arg);
- DPRINTK("No effect. sch_ingress doesn't maintain classes at the moment");
return 0;
}
-
-
-static void ingress_walk(struct Qdisc *sch,struct qdisc_walker *walker)
+static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
{
-#ifdef DEBUG_INGRESS
- struct ingress_qdisc_data *p = PRIV(sch);
-#endif
- DPRINTK("ingress_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
- DPRINTK("No effect. sch_ingress doesn't maintain classes at the moment");
+ return;
}
-
-static struct tcf_proto **ingress_find_tcf(struct Qdisc *sch,unsigned long cl)
+static struct tcf_proto **ingress_find_tcf(struct Qdisc *sch, unsigned long cl)
{
- struct ingress_qdisc_data *p = PRIV(sch);
+ struct ingress_qdisc_data *p = qdisc_priv(sch);
return &p->filter_list;
}
-
/* --------------------------- Qdisc operations ---------------------------- */
-
-static int ingress_enqueue(struct sk_buff *skb,struct Qdisc *sch)
+static int ingress_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
- struct ingress_qdisc_data *p = PRIV(sch);
+ struct ingress_qdisc_data *p = qdisc_priv(sch);
struct tcf_result res;
int result;
- D2PRINTK("ingress_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
result = tc_classify(skb, p->filter_list, &res);
- D2PRINTK("result %d class 0x%04x\n", result, res.classid);
- /*
- * Unlike normal "enqueue" functions, ingress_enqueue returns a
- * firewall FW_* code.
- */
-#ifdef CONFIG_NET_CLS_ACT
+
sch->bstats.packets++;
sch->bstats.bytes += skb->len;
switch (result) {
- case TC_ACT_SHOT:
- result = TC_ACT_SHOT;
- sch->qstats.drops++;
- break;
- case TC_ACT_STOLEN:
- case TC_ACT_QUEUED:
- result = TC_ACT_STOLEN;
- break;
- case TC_ACT_RECLASSIFY:
- case TC_ACT_OK:
- skb->tc_index = TC_H_MIN(res.classid);
- default:
- result = TC_ACT_OK;
- break;
+ case TC_ACT_SHOT:
+ result = TC_ACT_SHOT;
+ sch->qstats.drops++;
+ break;
+ case TC_ACT_STOLEN:
+ case TC_ACT_QUEUED:
+ result = TC_ACT_STOLEN;
+ break;
+ case TC_ACT_RECLASSIFY:
+ case TC_ACT_OK:
+ skb->tc_index = TC_H_MIN(res.classid);
+ default:
+ result = TC_ACT_OK;
+ break;
}
-#else
- D2PRINTK("Overriding result to ACCEPT\n");
- result = NF_ACCEPT;
- sch->bstats.packets++;
- sch->bstats.bytes += skb->len;
-#endif
return result;
}
-
-static struct sk_buff *ingress_dequeue(struct Qdisc *sch)
-{
-/*
- struct ingress_qdisc_data *p = PRIV(sch);
- D2PRINTK("ingress_dequeue(sch %p,[qdisc %p])\n",sch,PRIV(p));
-*/
- return NULL;
-}
-
-
-static int ingress_requeue(struct sk_buff *skb,struct Qdisc *sch)
-{
-/*
- struct ingress_qdisc_data *p = PRIV(sch);
- D2PRINTK("ingress_requeue(skb %p,sch %p,[qdisc %p])\n",skb,sch,PRIV(p));
-*/
- return 0;
-}
-
-static unsigned int ingress_drop(struct Qdisc *sch)
-{
-#ifdef DEBUG_INGRESS
- struct ingress_qdisc_data *p = PRIV(sch);
-#endif
- DPRINTK("ingress_drop(sch %p,[qdisc %p])\n", sch, p);
- return 0;
-}
-
-#ifndef CONFIG_NET_CLS_ACT
-#ifdef CONFIG_NETFILTER
-static unsigned int
-ing_hook(unsigned int hook, struct sk_buff *skb,
- const struct net_device *indev,
- const struct net_device *outdev,
- int (*okfn)(struct sk_buff *))
-{
-
- struct Qdisc *q;
- struct net_device *dev = skb->dev;
- int fwres=NF_ACCEPT;
-
- DPRINTK("ing_hook: skb %s dev=%s len=%u\n",
- skb->sk ? "(owned)" : "(unowned)",
- skb->dev ? skb->dev->name : "(no dev)",
- skb->len);
-
- if (dev->qdisc_ingress) {
- spin_lock(&dev->ingress_lock);
- if ((q = dev->qdisc_ingress) != NULL)
- fwres = q->enqueue(skb, q);
- spin_unlock(&dev->ingress_lock);
- }
-
- return fwres;
-}
-
-/* after ipt_filter */
-static struct nf_hook_ops ing_ops = {
- .hook = ing_hook,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
- .priority = NF_IP_PRI_FILTER + 1,
-};
-
-static struct nf_hook_ops ing6_ops = {
- .hook = ing_hook,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_PRE_ROUTING,
- .priority = NF_IP6_PRI_FILTER + 1,
-};
-
-#endif
-#endif
-
-static int ingress_init(struct Qdisc *sch,struct rtattr *opt)
-{
- struct ingress_qdisc_data *p = PRIV(sch);
-
-/* Make sure either netfilter or preferably CLS_ACT is
-* compiled in */
-#ifndef CONFIG_NET_CLS_ACT
-#ifndef CONFIG_NETFILTER
- printk("You MUST compile classifier actions into the kernel\n");
- return -EINVAL;
-#else
- printk("Ingress scheduler: Classifier actions prefered over netfilter\n");
-#endif
-#endif
-
-#ifndef CONFIG_NET_CLS_ACT
-#ifdef CONFIG_NETFILTER
- if (!nf_registered) {
- if (nf_register_hook(&ing_ops) < 0) {
- printk("ingress qdisc registration error \n");
- return -EINVAL;
- }
- nf_registered++;
-
- if (nf_register_hook(&ing6_ops) < 0) {
- printk("IPv6 ingress qdisc registration error, " \
- "disabling IPv6 support.\n");
- } else
- nf_registered++;
- }
-#endif
-#endif
-
- DPRINTK("ingress_init(sch %p,[qdisc %p],opt %p)\n",sch,p,opt);
- p->q = &noop_qdisc;
- return 0;
-}
-
-
-static void ingress_reset(struct Qdisc *sch)
-{
- struct ingress_qdisc_data *p = PRIV(sch);
-
- DPRINTK("ingress_reset(sch %p,[qdisc %p])\n", sch, p);
-
-/*
-#if 0
-*/
-/* for future use */
- qdisc_reset(p->q);
-/*
-#endif
-*/
-}
-
-/* ------------------------------------------------------------- */
-
-
/* ------------------------------------------------------------- */
static void ingress_destroy(struct Qdisc *sch)
{
- struct ingress_qdisc_data *p = PRIV(sch);
+ struct ingress_qdisc_data *p = qdisc_priv(sch);
- DPRINTK("ingress_destroy(sch %p,[qdisc %p])\n", sch, p);
tcf_destroy_chain(p->filter_list);
-#if 0
-/* for future use */
- qdisc_destroy(p->q);
-#endif
}
-
static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
{
- unsigned char *b = skb_tail_pointer(skb);
- struct rtattr *rta;
+ struct nlattr *nest;
- rta = (struct rtattr *) b;
- RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
- rta->rta_len = skb_tail_pointer(skb) - b;
+ nest = nla_nest_start(skb, TCA_OPTIONS);
+ if (nest == NULL)
+ goto nla_put_failure;
+ nla_nest_end(skb, nest);
return skb->len;
-rtattr_failure:
- nlmsg_trim(skb, b);
+nla_put_failure:
+ nla_nest_cancel(skb, nest);
return -1;
}
-static struct Qdisc_class_ops ingress_class_ops = {
+static const struct Qdisc_class_ops ingress_class_ops = {
.graft = ingress_graft,
.leaf = ingress_leaf,
.get = ingress_get,
.put = ingress_put,
.change = ingress_change,
- .delete = NULL,
.walk = ingress_walk,
.tcf_chain = ingress_find_tcf,
.bind_tcf = ingress_bind_filter,
.unbind_tcf = ingress_put,
- .dump = NULL,
};
-static struct Qdisc_ops ingress_qdisc_ops = {
- .next = NULL,
+static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
.cl_ops = &ingress_class_ops,
.id = "ingress",
.priv_size = sizeof(struct ingress_qdisc_data),
.enqueue = ingress_enqueue,
- .dequeue = ingress_dequeue,
- .requeue = ingress_requeue,
- .drop = ingress_drop,
- .init = ingress_init,
- .reset = ingress_reset,
.destroy = ingress_destroy,
- .change = NULL,
.dump = ingress_dump,
.owner = THIS_MODULE,
};
static int __init ingress_module_init(void)
{
- int ret = 0;
-
- if ((ret = register_qdisc(&ingress_qdisc_ops)) < 0) {
- printk("Unable to register Ingress qdisc\n");
- return ret;
- }
-
- return ret;
+ return register_qdisc(&ingress_qdisc_ops);
}
+
static void __exit ingress_module_exit(void)
{
unregister_qdisc(&ingress_qdisc_ops);
-#ifndef CONFIG_NET_CLS_ACT
-#ifdef CONFIG_NETFILTER
- if (nf_registered) {
- nf_unregister_hook(&ing_ops);
- if (nf_registered > 1)
- nf_unregister_hook(&ing6_ops);
- }
-#endif
-#endif
}
+
module_init(ingress_module_init)
module_exit(ingress_module_exit)
MODULE_LICENSE("GPL");
projects / linux-flexiantxendom0-3.2.10.git / blobdiff