Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c
new file mode 100644
index 0000000..8edc32a
--- /dev/null
+++ b/net/sched/sch_ingress.c
@@ -0,0 +1,436 @@
+/* net/sched/sch_ingress.c - Ingress qdisc
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Jamal Hadi Salim 1999
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter.h>
+#include <linux/smp.h>
+#include <net/pkt_sched.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+#include <linux/kmod.h>
+#include <linux/stat.h>
+#include <linux/interrupt.h>
+#include <linux/list.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)
+{
+#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;
+}
+
+
+static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
+{
+ return NULL;
+}
+
+
+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)
+{
+ 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)
+{
+#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)
+{
+#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");
+}
+
+
+static struct tcf_proto **ingress_find_tcf(struct Qdisc *sch,unsigned long cl)
+{
+ struct ingress_qdisc_data *p = PRIV(sch);
+
+ return &p->filter_list;
+}
+
+
+/* --------------------------- Qdisc operations ---------------------------- */
+
+
+static int ingress_enqueue(struct sk_buff *skb,struct Qdisc *sch)
+{
+ struct ingress_qdisc_data *p = 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:
+ case TC_ACT_UNSPEC:
+ default:
+ skb->tc_index = TC_H_MIN(res.classid);
+ result = TC_ACT_OK;
+ break;
+ };
+/* backward compat */
+#else
+#ifdef CONFIG_NET_CLS_POLICE
+ switch (result) {
+ case TC_POLICE_SHOT:
+ result = NF_DROP;
+ sch->qstats.drops++;
+ break;
+ case TC_POLICE_RECLASSIFY: /* DSCP remarking here ? */
+ case TC_POLICE_OK:
+ case TC_POLICE_UNSPEC:
+ default:
+ sch->bstats.packets++;
+ sch->bstats.bytes += skb->len;
+ result = NF_ACCEPT;
+ break;
+ };
+
+#else
+ D2PRINTK("Overriding result to ACCEPT\n");
+ result = NF_ACCEPT;
+ sch->bstats.packets++;
+ sch->bstats.bytes += skb->len;
+#endif
+#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 **pskb,
+ const struct net_device *indev,
+ const struct net_device *outdev,
+ int (*okfn)(struct sk_buff *))
+{
+
+ struct Qdisc *q;
+ struct sk_buff *skb = *pskb;
+ 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 ? (*pskb)->dev->name : "(no dev)",
+ skb->len);
+
+/*
+revisit later: Use a private since lock dev->queue_lock is also
+used on the egress (might slow things for an iota)
+*/
+
+ if (dev->qdisc_ingress) {
+ spin_lock(&dev->queue_lock);
+ if ((q = dev->qdisc_ingress) != NULL)
+ fwres = q->enqueue(skb, q);
+ spin_unlock(&dev->queue_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 tcf_proto *tp;
+
+ DPRINTK("ingress_destroy(sch %p,[qdisc %p])\n", sch, p);
+ while (p->filter_list) {
+ tp = p->filter_list;
+ p->filter_list = tp->next;
+ tcf_destroy(tp);
+ }
+#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;
+ struct rtattr *rta;
+
+ rta = (struct rtattr *) b;
+ RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
+ rta->rta_len = skb->tail - b;
+ return skb->len;
+
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static 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,
+ .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;
+}
+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");