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[NETFILTER]: nf_conntrack: don't use nfct in skb if conntrack is disabled

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Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yasuyuki Kozakai 2007-03-23 11:17:07 -07:00 committed by David S. Miller
parent e6f689db51
commit 5f79e0f916
4 changed files with 17 additions and 24 deletions
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11
include/linux/netfilter.h
View File

@ -281,9 +281,6 @@ extern void nf_reinject(struct sk_buff *skb,
struct nf_info *info,
unsigned int verdict);
extern void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *);
extern void nf_ct_attach(struct sk_buff *, struct sk_buff *);
/* FIXME: Before cache is ever used, this must be implemented for real. */
extern void nf_invalidate_cache(int pf);
@ -388,11 +385,17 @@ static inline int nf_hook(int pf, unsigned int hook, struct sk_buff **pskb,
{
return 1;
}
static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
struct flowi;
static inline void
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family) {}
#endif /*CONFIG_NETFILTER*/
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
extern void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *);
extern void nf_ct_attach(struct sk_buff *, struct sk_buff *);
#else
static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
#endif
#endif /*__KERNEL__*/
#endif /*__LINUX_NETFILTER_H*/

24
include/linux/skbuff.h
View File

@ -87,11 +87,12 @@
struct net_device;
#ifdef CONFIG_NETFILTER
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
struct nf_conntrack {
atomic_t use;
void (*destroy)(struct nf_conntrack *);
};
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
struct nf_bridge_info {
@ -106,8 +107,6 @@ struct nf_bridge_info {
};
#endif
#endif
struct sk_buff_head {
/* These two members must be first. */
struct sk_buff *next;
@ -276,15 +275,13 @@ struct sk_buff {
__be16 protocol;
void (*destructor)(struct sk_buff *skb);
#ifdef CONFIG_NETFILTER
struct nf_conntrack *nfct;
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
struct nf_conntrack *nfct;
struct sk_buff *nfct_reasm;
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
struct nf_bridge_info *nf_bridge;
#endif
#endif /* CONFIG_NETFILTER */
#ifdef CONFIG_NET_SCHED
__u16 tc_index; /* traffic control index */
#ifdef CONFIG_NET_CLS_ACT
@ -1558,7 +1555,7 @@ static inline unsigned int skb_checksum_complete(struct sk_buff *skb)
__skb_checksum_complete(skb);
}
#ifdef CONFIG_NETFILTER
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
static inline void nf_conntrack_put(struct nf_conntrack *nfct)
{
if (nfct && atomic_dec_and_test(&nfct->use))
@ -1569,7 +1566,6 @@ static inline void nf_conntrack_get(struct nf_conntrack *nfct)
if (nfct)
atomic_inc(&nfct->use);
}
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
static inline void nf_conntrack_get_reasm(struct sk_buff *skb)
{
if (skb)
@ -1595,9 +1591,9 @@ static inline void nf_bridge_get(struct nf_bridge_info *nf_bridge)
#endif /* CONFIG_BRIDGE_NETFILTER */
static inline void nf_reset(struct sk_buff *skb)
{
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
nf_conntrack_put(skb->nfct);
skb->nfct = NULL;
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
nf_conntrack_put_reasm(skb->nfct_reasm);
skb->nfct_reasm = NULL;
#endif
@ -1610,10 +1606,10 @@ static inline void nf_reset(struct sk_buff *skb)
/* Note: This doesn't put any conntrack and bridge info in dst. */
static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src)
{
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
dst->nfct = src->nfct;
nf_conntrack_get(src->nfct);
dst->nfctinfo = src->nfctinfo;
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
dst->nfct_reasm = src->nfct_reasm;
nf_conntrack_get_reasm(src->nfct_reasm);
#endif
@ -1625,8 +1621,8 @@ static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src)
static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src)
{
nf_conntrack_put(dst->nfct);
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
nf_conntrack_put(dst->nfct);
nf_conntrack_put_reasm(dst->nfct_reasm);
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
@ -1635,12 +1631,6 @@ static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src)
__nf_copy(dst, src);
}
#else /* CONFIG_NETFILTER */
static inline void nf_reset(struct sk_buff *skb) {}
static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src) {}
static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src) {}
#endif /* CONFIG_NETFILTER */
#ifdef CONFIG_NETWORK_SECMARK
static inline void skb_copy_secmark(struct sk_buff *to, const struct sk_buff *from)
{

4
net/core/skbuff.c
View File

@ -325,15 +325,13 @@ void __kfree_skb(struct sk_buff *skb)
WARN_ON(in_irq());
skb->destructor(skb);
}
#ifdef CONFIG_NETFILTER
nf_conntrack_put(skb->nfct);
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
nf_conntrack_put(skb->nfct);
nf_conntrack_put_reasm(skb->nfct_reasm);
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
nf_bridge_put(skb->nf_bridge);
#endif
#endif
/* XXX: IS this still necessary? - JHS */
#ifdef CONFIG_NET_SCHED
skb->tc_index = 0;

2
net/netfilter/core.c
View File

@ -240,6 +240,7 @@ void nf_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
}
EXPORT_SYMBOL(nf_proto_csum_replace4);
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
/* This does not belong here, but locally generated errors need it if connection
tracking in use: without this, connection may not be in hash table, and hence
manufactured ICMP or RST packets will not be associated with it. */
@ -259,6 +260,7 @@ void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb)
}
}
EXPORT_SYMBOL(nf_ct_attach);
#endif
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *proc_net_netfilter;