* Copyright: Jamal Hadi Salim (2002-4)
*/
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/bitops.h>
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/socket.h>
-#include <linux/sockios.h>
-#include <linux/in.h>
#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/module.h>
#include <linux/init.h>
-#include <linux/proc_fs.h>
-#include <linux/kmod.h>
-#include <net/sock.h>
+#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <linux/tc_act/tc_ipt.h>
#include <net/tc_act/tc_ipt.h>
#include <linux/netfilter_ipv4/ip_tables.h>
-/* use generic hash table */
-#define MY_TAB_SIZE 16
-#define MY_TAB_MASK 15
-static u32 idx_gen;
-static struct tcf_ipt *tcf_ipt_ht[MY_TAB_SIZE];
-/* ipt hash table lock */
+#define IPT_TAB_MASK 15
+static struct tcf_common *tcf_ipt_ht[IPT_TAB_MASK + 1];
+static u32 ipt_idx_gen;
static DEFINE_RWLOCK(ipt_lock);
-/* ovewrride the defaults */
-#define tcf_st tcf_ipt
-#define tcf_t_lock ipt_lock
-#define tcf_ht tcf_ipt_ht
-
-#define CONFIG_NET_ACT_INIT
-#include <net/pkt_act.h>
+static struct tcf_hashinfo ipt_hash_info = {
+ .htab = tcf_ipt_ht,
+ .hmask = IPT_TAB_MASK,
+ .lock = &ipt_lock,
+};
-static int
-ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int hook)
+static int ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int hook)
{
- struct ipt_target *target;
+ struct xt_tgchk_param par;
+ struct xt_target *target;
int ret = 0;
- target = xt_find_target(AF_INET, t->u.user.name, t->u.user.revision);
+ target = xt_request_find_target(AF_INET, t->u.user.name,
+ t->u.user.revision);
if (!target)
return -ENOENT;
- DPRINTK("ipt_init_target: found %s\n", target->name);
t->u.kernel.target = target;
-
- if (t->u.kernel.target->checkentry
- && !t->u.kernel.target->checkentry(table, NULL, t->data,
- t->u.target_size - sizeof(*t),
- hook)) {
- DPRINTK("ipt_init_target: check failed for `%s'.\n",
- t->u.kernel.target->name);
+ par.table = table;
+ par.entryinfo = NULL;
+ par.target = target;
+ par.targinfo = t->data;
+ par.hook_mask = hook;
+ par.family = NFPROTO_IPV4;
+
+ ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
+ if (ret < 0) {
module_put(t->u.kernel.target->me);
- ret = -EINVAL;
+ return ret;
}
-
- return ret;
+ return 0;
}
-static void
-ipt_destroy_target(struct ipt_entry_target *t)
+static void ipt_destroy_target(struct ipt_entry_target *t)
{
- if (t->u.kernel.target->destroy)
- t->u.kernel.target->destroy(t->data,
- t->u.target_size - sizeof(*t));
- module_put(t->u.kernel.target->me);
+ struct xt_tgdtor_param par = {
+ .target = t->u.kernel.target,
+ .targinfo = t->data,
+ };
+ if (par.target->destroy != NULL)
+ par.target->destroy(&par);
+ module_put(par.target->me);
}
-static int
-tcf_ipt_release(struct tcf_ipt *p, int bind)
+static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
{
int ret = 0;
- if (p) {
+ if (ipt) {
if (bind)
- p->bindcnt--;
- p->refcnt--;
- if (p->bindcnt <= 0 && p->refcnt <= 0) {
- ipt_destroy_target(p->t);
- kfree(p->tname);
- kfree(p->t);
- tcf_hash_destroy(p);
+ ipt->tcf_bindcnt--;
+ ipt->tcf_refcnt--;
+ if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
+ ipt_destroy_target(ipt->tcfi_t);
+ kfree(ipt->tcfi_tname);
+ kfree(ipt->tcfi_t);
+ tcf_hash_destroy(&ipt->common, &ipt_hash_info);
ret = ACT_P_DELETED;
}
}
return ret;
}
-static int
-tcf_ipt_init(struct rtattr *rta, struct rtattr *est, struct tc_action *a,
- int ovr, int bind)
+static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
+ [TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
+ [TCA_IPT_HOOK] = { .type = NLA_U32 },
+ [TCA_IPT_INDEX] = { .type = NLA_U32 },
+ [TCA_IPT_TARG] = { .len = sizeof(struct ipt_entry_target) },
+};
+
+static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est,
+ struct tc_action *a, int ovr, int bind)
{
- struct rtattr *tb[TCA_IPT_MAX];
- struct tcf_ipt *p;
+ struct nlattr *tb[TCA_IPT_MAX + 1];
+ struct tcf_ipt *ipt;
+ struct tcf_common *pc;
struct ipt_entry_target *td, *t;
char *tname;
int ret = 0, err;
u32 hook = 0;
u32 index = 0;
- if (rta == NULL || rtattr_parse_nested(tb, TCA_IPT_MAX, rta) < 0)
+ if (nla == NULL)
return -EINVAL;
- if (tb[TCA_IPT_HOOK-1] == NULL ||
- RTA_PAYLOAD(tb[TCA_IPT_HOOK-1]) < sizeof(u32))
+ err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
+ if (err < 0)
+ return err;
+
+ if (tb[TCA_IPT_HOOK] == NULL)
return -EINVAL;
- if (tb[TCA_IPT_TARG-1] == NULL ||
- RTA_PAYLOAD(tb[TCA_IPT_TARG-1]) < sizeof(*t))
+ if (tb[TCA_IPT_TARG] == NULL)
return -EINVAL;
- td = (struct ipt_entry_target *)RTA_DATA(tb[TCA_IPT_TARG-1]);
- if (RTA_PAYLOAD(tb[TCA_IPT_TARG-1]) < td->u.target_size)
+
+ td = (struct ipt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
+ if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
return -EINVAL;
- if (tb[TCA_IPT_INDEX-1] != NULL &&
- RTA_PAYLOAD(tb[TCA_IPT_INDEX-1]) >= sizeof(u32))
- index = *(u32 *)RTA_DATA(tb[TCA_IPT_INDEX-1]);
+ if (tb[TCA_IPT_INDEX] != NULL)
+ index = nla_get_u32(tb[TCA_IPT_INDEX]);
- p = tcf_hash_check(index, a, ovr, bind);
- if (p == NULL) {
- p = tcf_hash_create(index, est, a, sizeof(*p), ovr, bind);
- if (p == NULL)
- return -ENOMEM;
+ pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
+ if (!pc) {
+ pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
+ &ipt_idx_gen, &ipt_hash_info);
+ if (IS_ERR(pc))
+ return PTR_ERR(pc);
ret = ACT_P_CREATED;
} else {
if (!ovr) {
- tcf_ipt_release(p, bind);
+ tcf_ipt_release(to_ipt(pc), bind);
return -EEXIST;
}
}
+ ipt = to_ipt(pc);
- hook = *(u32 *)RTA_DATA(tb[TCA_IPT_HOOK-1]);
+ hook = nla_get_u32(tb[TCA_IPT_HOOK]);
err = -ENOMEM;
tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
- if (tname == NULL)
+ if (unlikely(!tname))
goto err1;
- if (tb[TCA_IPT_TABLE - 1] == NULL ||
- rtattr_strlcpy(tname, tb[TCA_IPT_TABLE-1], IFNAMSIZ) >= IFNAMSIZ)
+ if (tb[TCA_IPT_TABLE] == NULL ||
+ nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
strcpy(tname, "mangle");
- t = kmalloc(td->u.target_size, GFP_KERNEL);
- if (t == NULL)
+ t = kmemdup(td, td->u.target_size, GFP_KERNEL);
+ if (unlikely(!t))
goto err2;
- memcpy(t, td, td->u.target_size);
if ((err = ipt_init_target(t, tname, hook)) < 0)
goto err3;
- spin_lock_bh(&p->lock);
+ spin_lock_bh(&ipt->tcf_lock);
if (ret != ACT_P_CREATED) {
- ipt_destroy_target(p->t);
- kfree(p->tname);
- kfree(p->t);
+ ipt_destroy_target(ipt->tcfi_t);
+ kfree(ipt->tcfi_tname);
+ kfree(ipt->tcfi_t);
}
- p->tname = tname;
- p->t = t;
- p->hook = hook;
- spin_unlock_bh(&p->lock);
+ ipt->tcfi_tname = tname;
+ ipt->tcfi_t = t;
+ ipt->tcfi_hook = hook;
+ spin_unlock_bh(&ipt->tcf_lock);
if (ret == ACT_P_CREATED)
- tcf_hash_insert(p);
+ tcf_hash_insert(pc, &ipt_hash_info);
return ret;
err3:
err2:
kfree(tname);
err1:
- kfree(p);
+ kfree(pc);
return err;
}
-static int
-tcf_ipt_cleanup(struct tc_action *a, int bind)
+static int tcf_ipt_cleanup(struct tc_action *a, int bind)
{
- struct tcf_ipt *p = PRIV(a, ipt);
- return tcf_ipt_release(p, bind);
+ struct tcf_ipt *ipt = a->priv;
+ return tcf_ipt_release(ipt, bind);
}
-static int
-tcf_ipt(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res)
+static int tcf_ipt(struct sk_buff *skb, struct tc_action *a,
+ struct tcf_result *res)
{
int ret = 0, result = 0;
- struct tcf_ipt *p = PRIV(a, ipt);
+ struct tcf_ipt *ipt = a->priv;
+ struct xt_target_param par;
if (skb_cloned(skb)) {
if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
return TC_ACT_UNSPEC;
}
- spin_lock(&p->lock);
+ spin_lock(&ipt->tcf_lock);
- p->tm.lastuse = jiffies;
- p->bstats.bytes += skb->len;
- p->bstats.packets++;
+ ipt->tcf_tm.lastuse = jiffies;
+ ipt->tcf_bstats.bytes += qdisc_pkt_len(skb);
+ ipt->tcf_bstats.packets++;
/* yes, we have to worry about both in and out dev
worry later - danger - this API seems to have changed
from earlier kernels */
+ par.in = skb->dev;
+ par.out = NULL;
+ par.hooknum = ipt->tcfi_hook;
+ par.target = ipt->tcfi_t->u.kernel.target;
+ par.targinfo = ipt->tcfi_t->data;
+ ret = par.target->target(skb, &par);
- /* iptables targets take a double skb pointer in case the skb
- * needs to be replaced. We don't own the skb, so this must not
- * happen. The pskb_expand_head above should make sure of this */
- ret = p->t->u.kernel.target->target(&skb, skb->dev, NULL,
- p->hook, p->t->data, NULL);
switch (ret) {
case NF_ACCEPT:
result = TC_ACT_OK;
break;
case NF_DROP:
result = TC_ACT_SHOT;
- p->qstats.drops++;
+ ipt->tcf_qstats.drops++;
break;
case IPT_CONTINUE:
result = TC_ACT_PIPE;
result = TC_POLICE_OK;
break;
}
- spin_unlock(&p->lock);
+ spin_unlock(&ipt->tcf_lock);
return result;
}
-static int
-tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
+static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
+ unsigned char *b = skb_tail_pointer(skb);
+ struct tcf_ipt *ipt = a->priv;
struct ipt_entry_target *t;
struct tcf_t tm;
struct tc_cnt c;
- unsigned char *b = skb->tail;
- struct tcf_ipt *p = PRIV(a, ipt);
/* for simple targets kernel size == user size
** user name = target name
** for foolproof you need to not assume this
*/
- t = kmalloc(p->t->u.user.target_size, GFP_ATOMIC);
- if (t == NULL)
- goto rtattr_failure;
-
- c.bindcnt = p->bindcnt - bind;
- c.refcnt = p->refcnt - ref;
- memcpy(t, p->t, p->t->u.user.target_size);
- strcpy(t->u.user.name, p->t->u.kernel.target->name);
-
- DPRINTK("\ttcf_ipt_dump tablename %s length %d\n", p->tname,
- strlen(p->tname));
- DPRINTK("\tdump target name %s size %d size user %d "
- "data[0] %x data[1] %x\n", p->t->u.kernel.target->name,
- p->t->u.target_size, p->t->u.user.target_size,
- p->t->data[0], p->t->data[1]);
- RTA_PUT(skb, TCA_IPT_TARG, p->t->u.user.target_size, t);
- RTA_PUT(skb, TCA_IPT_INDEX, 4, &p->index);
- RTA_PUT(skb, TCA_IPT_HOOK, 4, &p->hook);
- RTA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
- RTA_PUT(skb, TCA_IPT_TABLE, IFNAMSIZ, p->tname);
- tm.install = jiffies_to_clock_t(jiffies - p->tm.install);
- tm.lastuse = jiffies_to_clock_t(jiffies - p->tm.lastuse);
- tm.expires = jiffies_to_clock_t(p->tm.expires);
- RTA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
+ t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
+ if (unlikely(!t))
+ goto nla_put_failure;
+
+ c.bindcnt = ipt->tcf_bindcnt - bind;
+ c.refcnt = ipt->tcf_refcnt - ref;
+ strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
+
+ NLA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);
+ NLA_PUT_U32(skb, TCA_IPT_INDEX, ipt->tcf_index);
+ NLA_PUT_U32(skb, TCA_IPT_HOOK, ipt->tcfi_hook);
+ NLA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
+ NLA_PUT_STRING(skb, TCA_IPT_TABLE, ipt->tcfi_tname);
+ tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
+ tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
+ tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
+ NLA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
kfree(t);
return skb->len;
- rtattr_failure:
- skb_trim(skb, b - skb->data);
+nla_put_failure:
+ nlmsg_trim(skb, b);
kfree(t);
return -1;
}
static struct tc_action_ops act_ipt_ops = {
.kind = "ipt",
+ .hinfo = &ipt_hash_info,
.type = TCA_ACT_IPT,
.capab = TCA_CAP_NONE,
.owner = THIS_MODULE,
MODULE_DESCRIPTION("Iptables target actions");
MODULE_LICENSE("GPL");
-static int __init
-ipt_init_module(void)
+static int __init ipt_init_module(void)
{
return tcf_register_action(&act_ipt_ops);
}
-static void __exit
-ipt_cleanup_module(void)
+static void __exit ipt_cleanup_module(void)
{
tcf_unregister_action(&act_ipt_ops);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff