/*
|
/*
|
* net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class.
|
* net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class.
|
*
|
*
|
* This program is free software; you can redistribute it and/or
|
* This program is free software; you can redistribute it and/or
|
* modify it under the terms of the GNU General Public License
|
* modify it under the terms of the GNU General Public License
|
* as published by the Free Software Foundation; either version
|
* as published by the Free Software Foundation; either version
|
* 2 of the License, or (at your option) any later version.
|
* 2 of the License, or (at your option) any later version.
|
*
|
*
|
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
|
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
|
*
|
*
|
* Changes:
|
* Changes:
|
* Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one
|
* Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one
|
* Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel).
|
* Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel).
|
*/
|
*/
|
|
|
#include <linux/config.h>
|
#include <linux/config.h>
|
#include <linux/module.h>
|
#include <linux/module.h>
|
#include <asm/uaccess.h>
|
#include <asm/uaccess.h>
|
#include <asm/system.h>
|
#include <asm/system.h>
|
#include <asm/bitops.h>
|
#include <asm/bitops.h>
|
#include <linux/types.h>
|
#include <linux/types.h>
|
#include <linux/kernel.h>
|
#include <linux/kernel.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/mm.h>
|
#include <linux/mm.h>
|
#include <linux/socket.h>
|
#include <linux/socket.h>
|
#include <linux/sockios.h>
|
#include <linux/sockios.h>
|
#include <linux/in.h>
|
#include <linux/in.h>
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/interrupt.h>
|
#include <linux/interrupt.h>
|
#include <linux/if_ether.h>
|
#include <linux/if_ether.h>
|
#include <linux/inet.h>
|
#include <linux/inet.h>
|
#include <linux/netdevice.h>
|
#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
|
#include <linux/etherdevice.h>
|
#include <linux/notifier.h>
|
#include <linux/notifier.h>
|
#include <linux/netfilter.h>
|
#include <linux/netfilter.h>
|
#include <net/ip.h>
|
#include <net/ip.h>
|
#include <net/route.h>
|
#include <net/route.h>
|
#include <linux/skbuff.h>
|
#include <linux/skbuff.h>
|
#include <net/sock.h>
|
#include <net/sock.h>
|
#include <net/pkt_sched.h>
|
#include <net/pkt_sched.h>
|
|
|
struct fw_head
|
struct fw_head
|
{
|
{
|
struct fw_filter *ht[256];
|
struct fw_filter *ht[256];
|
};
|
};
|
|
|
struct fw_filter
|
struct fw_filter
|
{
|
{
|
struct fw_filter *next;
|
struct fw_filter *next;
|
u32 id;
|
u32 id;
|
struct tcf_result res;
|
struct tcf_result res;
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
struct tcf_police *police;
|
struct tcf_police *police;
|
#endif
|
#endif
|
};
|
};
|
|
|
static __inline__ int fw_hash(u32 handle)
|
static __inline__ int fw_hash(u32 handle)
|
{
|
{
|
return handle&0xFF;
|
return handle&0xFF;
|
}
|
}
|
|
|
static int fw_classify(struct sk_buff *skb, struct tcf_proto *tp,
|
static int fw_classify(struct sk_buff *skb, struct tcf_proto *tp,
|
struct tcf_result *res)
|
struct tcf_result *res)
|
{
|
{
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_filter *f;
|
struct fw_filter *f;
|
#ifdef CONFIG_NETFILTER
|
#ifdef CONFIG_NETFILTER
|
u32 id = skb->nfmark;
|
u32 id = skb->nfmark;
|
#else
|
#else
|
u32 id = 0;
|
u32 id = 0;
|
#endif
|
#endif
|
|
|
if (head == NULL)
|
if (head == NULL)
|
goto old_method;
|
goto old_method;
|
|
|
for (f=head->ht[fw_hash(id)]; f; f=f->next) {
|
for (f=head->ht[fw_hash(id)]; f; f=f->next) {
|
if (f->id == id) {
|
if (f->id == id) {
|
*res = f->res;
|
*res = f->res;
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
if (f->police)
|
if (f->police)
|
return tcf_police(skb, f->police);
|
return tcf_police(skb, f->police);
|
#endif
|
#endif
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
return -1;
|
return -1;
|
|
|
old_method:
|
old_method:
|
if (id && (TC_H_MAJ(id) == 0 ||
|
if (id && (TC_H_MAJ(id) == 0 ||
|
!(TC_H_MAJ(id^tp->q->handle)))) {
|
!(TC_H_MAJ(id^tp->q->handle)))) {
|
res->classid = id;
|
res->classid = id;
|
res->class = 0;
|
res->class = 0;
|
return 0;
|
return 0;
|
}
|
}
|
return -1;
|
return -1;
|
}
|
}
|
|
|
static unsigned long fw_get(struct tcf_proto *tp, u32 handle)
|
static unsigned long fw_get(struct tcf_proto *tp, u32 handle)
|
{
|
{
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_filter *f;
|
struct fw_filter *f;
|
|
|
if (head == NULL)
|
if (head == NULL)
|
return 0;
|
return 0;
|
|
|
for (f=head->ht[fw_hash(handle)]; f; f=f->next) {
|
for (f=head->ht[fw_hash(handle)]; f; f=f->next) {
|
if (f->id == handle)
|
if (f->id == handle)
|
return (unsigned long)f;
|
return (unsigned long)f;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void fw_put(struct tcf_proto *tp, unsigned long f)
|
static void fw_put(struct tcf_proto *tp, unsigned long f)
|
{
|
{
|
}
|
}
|
|
|
static int fw_init(struct tcf_proto *tp)
|
static int fw_init(struct tcf_proto *tp)
|
{
|
{
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void fw_destroy(struct tcf_proto *tp)
|
static void fw_destroy(struct tcf_proto *tp)
|
{
|
{
|
struct fw_head *head = (struct fw_head*)xchg(&tp->root, NULL);
|
struct fw_head *head = (struct fw_head*)xchg(&tp->root, NULL);
|
struct fw_filter *f;
|
struct fw_filter *f;
|
int h;
|
int h;
|
|
|
if (head == NULL) {
|
if (head == NULL) {
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return;
|
return;
|
}
|
}
|
|
|
for (h=0; h<256; h++) {
|
for (h=0; h<256; h++) {
|
while ((f=head->ht[h]) != NULL) {
|
while ((f=head->ht[h]) != NULL) {
|
unsigned long cl;
|
unsigned long cl;
|
head->ht[h] = f->next;
|
head->ht[h] = f->next;
|
|
|
if ((cl = __cls_set_class(&f->res.class, 0)) != 0)
|
if ((cl = __cls_set_class(&f->res.class, 0)) != 0)
|
tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
|
tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
tcf_police_release(f->police);
|
tcf_police_release(f->police);
|
#endif
|
#endif
|
kfree(f);
|
kfree(f);
|
}
|
}
|
}
|
}
|
kfree(head);
|
kfree(head);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
}
|
}
|
|
|
static int fw_delete(struct tcf_proto *tp, unsigned long arg)
|
static int fw_delete(struct tcf_proto *tp, unsigned long arg)
|
{
|
{
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_filter *f = (struct fw_filter*)arg;
|
struct fw_filter *f = (struct fw_filter*)arg;
|
struct fw_filter **fp;
|
struct fw_filter **fp;
|
|
|
if (head == NULL || f == NULL)
|
if (head == NULL || f == NULL)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
for (fp=&head->ht[fw_hash(f->id)]; *fp; fp = &(*fp)->next) {
|
for (fp=&head->ht[fw_hash(f->id)]; *fp; fp = &(*fp)->next) {
|
if (*fp == f) {
|
if (*fp == f) {
|
unsigned long cl;
|
unsigned long cl;
|
|
|
tcf_tree_lock(tp);
|
tcf_tree_lock(tp);
|
*fp = f->next;
|
*fp = f->next;
|
tcf_tree_unlock(tp);
|
tcf_tree_unlock(tp);
|
|
|
if ((cl = cls_set_class(tp, &f->res.class, 0)) != 0)
|
if ((cl = cls_set_class(tp, &f->res.class, 0)) != 0)
|
tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
|
tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
tcf_police_release(f->police);
|
tcf_police_release(f->police);
|
#endif
|
#endif
|
kfree(f);
|
kfree(f);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
|
|
static int fw_change(struct tcf_proto *tp, unsigned long base,
|
static int fw_change(struct tcf_proto *tp, unsigned long base,
|
u32 handle,
|
u32 handle,
|
struct rtattr **tca,
|
struct rtattr **tca,
|
unsigned long *arg)
|
unsigned long *arg)
|
{
|
{
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_filter *f;
|
struct fw_filter *f;
|
struct rtattr *opt = tca[TCA_OPTIONS-1];
|
struct rtattr *opt = tca[TCA_OPTIONS-1];
|
struct rtattr *tb[TCA_FW_MAX];
|
struct rtattr *tb[TCA_FW_MAX];
|
int err;
|
int err;
|
|
|
if (!opt)
|
if (!opt)
|
return handle ? -EINVAL : 0;
|
return handle ? -EINVAL : 0;
|
|
|
if (rtattr_parse(tb, TCA_FW_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt)) < 0)
|
if (rtattr_parse(tb, TCA_FW_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt)) < 0)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
if ((f = (struct fw_filter*)*arg) != NULL) {
|
if ((f = (struct fw_filter*)*arg) != NULL) {
|
/* Node exists: adjust only classid */
|
/* Node exists: adjust only classid */
|
|
|
if (f->id != handle && handle)
|
if (f->id != handle && handle)
|
return -EINVAL;
|
return -EINVAL;
|
if (tb[TCA_FW_CLASSID-1]) {
|
if (tb[TCA_FW_CLASSID-1]) {
|
unsigned long cl;
|
unsigned long cl;
|
|
|
f->res.classid = *(u32*)RTA_DATA(tb[TCA_FW_CLASSID-1]);
|
f->res.classid = *(u32*)RTA_DATA(tb[TCA_FW_CLASSID-1]);
|
cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, f->res.classid);
|
cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, f->res.classid);
|
cl = cls_set_class(tp, &f->res.class, cl);
|
cl = cls_set_class(tp, &f->res.class, cl);
|
if (cl)
|
if (cl)
|
tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
|
tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
|
}
|
}
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
if (tb[TCA_FW_POLICE-1]) {
|
if (tb[TCA_FW_POLICE-1]) {
|
struct tcf_police *police = tcf_police_locate(tb[TCA_FW_POLICE-1], tca[TCA_RATE-1]);
|
struct tcf_police *police = tcf_police_locate(tb[TCA_FW_POLICE-1], tca[TCA_RATE-1]);
|
|
|
tcf_tree_lock(tp);
|
tcf_tree_lock(tp);
|
police = xchg(&f->police, police);
|
police = xchg(&f->police, police);
|
tcf_tree_unlock(tp);
|
tcf_tree_unlock(tp);
|
|
|
tcf_police_release(police);
|
tcf_police_release(police);
|
}
|
}
|
#endif
|
#endif
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if (!handle)
|
if (!handle)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
if (head == NULL) {
|
if (head == NULL) {
|
head = kmalloc(sizeof(struct fw_head), GFP_KERNEL);
|
head = kmalloc(sizeof(struct fw_head), GFP_KERNEL);
|
if (head == NULL)
|
if (head == NULL)
|
return -ENOBUFS;
|
return -ENOBUFS;
|
memset(head, 0, sizeof(*head));
|
memset(head, 0, sizeof(*head));
|
|
|
tcf_tree_lock(tp);
|
tcf_tree_lock(tp);
|
tp->root = head;
|
tp->root = head;
|
tcf_tree_unlock(tp);
|
tcf_tree_unlock(tp);
|
}
|
}
|
|
|
f = kmalloc(sizeof(struct fw_filter), GFP_KERNEL);
|
f = kmalloc(sizeof(struct fw_filter), GFP_KERNEL);
|
if (f == NULL)
|
if (f == NULL)
|
return -ENOBUFS;
|
return -ENOBUFS;
|
memset(f, 0, sizeof(*f));
|
memset(f, 0, sizeof(*f));
|
|
|
f->id = handle;
|
f->id = handle;
|
|
|
if (tb[TCA_FW_CLASSID-1]) {
|
if (tb[TCA_FW_CLASSID-1]) {
|
err = -EINVAL;
|
err = -EINVAL;
|
if (RTA_PAYLOAD(tb[TCA_FW_CLASSID-1]) != 4)
|
if (RTA_PAYLOAD(tb[TCA_FW_CLASSID-1]) != 4)
|
goto errout;
|
goto errout;
|
f->res.classid = *(u32*)RTA_DATA(tb[TCA_FW_CLASSID-1]);
|
f->res.classid = *(u32*)RTA_DATA(tb[TCA_FW_CLASSID-1]);
|
cls_set_class(tp, &f->res.class, tp->q->ops->cl_ops->bind_tcf(tp->q, base, f->res.classid));
|
cls_set_class(tp, &f->res.class, tp->q->ops->cl_ops->bind_tcf(tp->q, base, f->res.classid));
|
}
|
}
|
|
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
if (tb[TCA_FW_POLICE-1])
|
if (tb[TCA_FW_POLICE-1])
|
f->police = tcf_police_locate(tb[TCA_FW_POLICE-1], tca[TCA_RATE-1]);
|
f->police = tcf_police_locate(tb[TCA_FW_POLICE-1], tca[TCA_RATE-1]);
|
#endif
|
#endif
|
|
|
f->next = head->ht[fw_hash(handle)];
|
f->next = head->ht[fw_hash(handle)];
|
tcf_tree_lock(tp);
|
tcf_tree_lock(tp);
|
head->ht[fw_hash(handle)] = f;
|
head->ht[fw_hash(handle)] = f;
|
tcf_tree_unlock(tp);
|
tcf_tree_unlock(tp);
|
|
|
*arg = (unsigned long)f;
|
*arg = (unsigned long)f;
|
return 0;
|
return 0;
|
|
|
errout:
|
errout:
|
if (f)
|
if (f)
|
kfree(f);
|
kfree(f);
|
return err;
|
return err;
|
}
|
}
|
|
|
static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg)
|
static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg)
|
{
|
{
|
struct fw_head *head = (struct fw_head*)tp->root;
|
struct fw_head *head = (struct fw_head*)tp->root;
|
int h;
|
int h;
|
|
|
if (head == NULL)
|
if (head == NULL)
|
arg->stop = 1;
|
arg->stop = 1;
|
|
|
if (arg->stop)
|
if (arg->stop)
|
return;
|
return;
|
|
|
for (h = 0; h < 256; h++) {
|
for (h = 0; h < 256; h++) {
|
struct fw_filter *f;
|
struct fw_filter *f;
|
|
|
for (f = head->ht[h]; f; f = f->next) {
|
for (f = head->ht[h]; f; f = f->next) {
|
if (arg->count < arg->skip) {
|
if (arg->count < arg->skip) {
|
arg->count++;
|
arg->count++;
|
continue;
|
continue;
|
}
|
}
|
if (arg->fn(tp, (unsigned long)f, arg) < 0) {
|
if (arg->fn(tp, (unsigned long)f, arg) < 0) {
|
arg->stop = 1;
|
arg->stop = 1;
|
break;
|
break;
|
}
|
}
|
arg->count++;
|
arg->count++;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
static int fw_dump(struct tcf_proto *tp, unsigned long fh,
|
static int fw_dump(struct tcf_proto *tp, unsigned long fh,
|
struct sk_buff *skb, struct tcmsg *t)
|
struct sk_buff *skb, struct tcmsg *t)
|
{
|
{
|
struct fw_filter *f = (struct fw_filter*)fh;
|
struct fw_filter *f = (struct fw_filter*)fh;
|
unsigned char *b = skb->tail;
|
unsigned char *b = skb->tail;
|
struct rtattr *rta;
|
struct rtattr *rta;
|
|
|
if (f == NULL)
|
if (f == NULL)
|
return skb->len;
|
return skb->len;
|
|
|
t->tcm_handle = f->id;
|
t->tcm_handle = f->id;
|
|
|
if (!f->res.classid
|
if (!f->res.classid
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
&& !f->police
|
&& !f->police
|
#endif
|
#endif
|
)
|
)
|
return skb->len;
|
return skb->len;
|
|
|
rta = (struct rtattr*)b;
|
rta = (struct rtattr*)b;
|
RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
|
RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
|
|
|
if (f->res.classid)
|
if (f->res.classid)
|
RTA_PUT(skb, TCA_FW_CLASSID, 4, &f->res.classid);
|
RTA_PUT(skb, TCA_FW_CLASSID, 4, &f->res.classid);
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
if (f->police) {
|
if (f->police) {
|
struct rtattr * p_rta = (struct rtattr*)skb->tail;
|
struct rtattr * p_rta = (struct rtattr*)skb->tail;
|
|
|
RTA_PUT(skb, TCA_FW_POLICE, 0, NULL);
|
RTA_PUT(skb, TCA_FW_POLICE, 0, NULL);
|
|
|
if (tcf_police_dump(skb, f->police) < 0)
|
if (tcf_police_dump(skb, f->police) < 0)
|
goto rtattr_failure;
|
goto rtattr_failure;
|
|
|
p_rta->rta_len = skb->tail - (u8*)p_rta;
|
p_rta->rta_len = skb->tail - (u8*)p_rta;
|
}
|
}
|
#endif
|
#endif
|
|
|
rta->rta_len = skb->tail - b;
|
rta->rta_len = skb->tail - b;
|
#ifdef CONFIG_NET_CLS_POLICE
|
#ifdef CONFIG_NET_CLS_POLICE
|
if (f->police) {
|
if (f->police) {
|
if (qdisc_copy_stats(skb, &f->police->stats))
|
if (qdisc_copy_stats(skb, &f->police->stats))
|
goto rtattr_failure;
|
goto rtattr_failure;
|
}
|
}
|
#endif
|
#endif
|
return skb->len;
|
return skb->len;
|
|
|
rtattr_failure:
|
rtattr_failure:
|
skb_trim(skb, b - skb->data);
|
skb_trim(skb, b - skb->data);
|
return -1;
|
return -1;
|
}
|
}
|
|
|
struct tcf_proto_ops cls_fw_ops = {
|
struct tcf_proto_ops cls_fw_ops = {
|
NULL,
|
NULL,
|
"fw",
|
"fw",
|
fw_classify,
|
fw_classify,
|
fw_init,
|
fw_init,
|
fw_destroy,
|
fw_destroy,
|
|
|
fw_get,
|
fw_get,
|
fw_put,
|
fw_put,
|
fw_change,
|
fw_change,
|
fw_delete,
|
fw_delete,
|
fw_walk,
|
fw_walk,
|
fw_dump
|
fw_dump
|
};
|
};
|
|
|
#ifdef MODULE
|
#ifdef MODULE
|
int init_module(void)
|
int init_module(void)
|
{
|
{
|
return register_tcf_proto_ops(&cls_fw_ops);
|
return register_tcf_proto_ops(&cls_fw_ops);
|
}
|
}
|
|
|
void cleanup_module(void)
|
void cleanup_module(void)
|
{
|
{
|
unregister_tcf_proto_ops(&cls_fw_ops);
|
unregister_tcf_proto_ops(&cls_fw_ops);
|
}
|
}
|
#endif
|
#endif
|
MODULE_LICENSE("GPL");
|
MODULE_LICENSE("GPL");
|
|
|
