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[NETFILTER]: nf_conntrack: kill destroy() in struct nf_conntrack for diet

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The destructor per conntrack is unnecessary, then this replaces it with
system wide destructor.

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 11:17:27 -07:00 committed by David S. Miller
parent 5f79e0f916
commit de6e05c49f
4 changed files with 22 additions and 4 deletions
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1
include/linux/netfilter.h
View File

@ -393,6 +393,7 @@ nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family) {}
#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 *);
extern void (*nf_ct_destroy)(struct nf_conntrack *);
#else
static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
#endif

4
include/linux/skbuff.h
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@ -90,7 +90,6 @@ struct net_device;
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
struct nf_conntrack {
atomic_t use;
void (*destroy)(struct nf_conntrack *);
};
#endif
@ -1556,10 +1555,11 @@ static inline unsigned int skb_checksum_complete(struct sk_buff *skb)
}
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
extern void nf_conntrack_destroy(struct nf_conntrack *nfct);
static inline void nf_conntrack_put(struct nf_conntrack *nfct)
{
if (nfct && atomic_dec_and_test(&nfct->use))
nfct->destroy(nfct);
nf_conntrack_destroy(nfct);
}
static inline void nf_conntrack_get(struct nf_conntrack *nfct)
{

17
net/netfilter/core.c
View File

@ -260,7 +260,22 @@ void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb)
}
}
EXPORT_SYMBOL(nf_ct_attach);
#endif
void (*nf_ct_destroy)(struct nf_conntrack *);
EXPORT_SYMBOL(nf_ct_destroy);
void nf_conntrack_destroy(struct nf_conntrack *nfct)
{
void (*destroy)(struct nf_conntrack *);
rcu_read_lock();
destroy = rcu_dereference(nf_ct_destroy);
BUG_ON(destroy == NULL);
destroy(nfct);
rcu_read_unlock();
}
EXPORT_SYMBOL(nf_conntrack_destroy);
#endif /* CONFIG_NF_CONNTRACK */
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *proc_net_netfilter;

4
net/netfilter/nf_conntrack_core.c
View File

@ -616,7 +616,6 @@ __nf_conntrack_alloc(const struct nf_conntrack_tuple *orig,
memset(conntrack, 0, nf_ct_cache[features].size);
conntrack->features = features;
atomic_set(&conntrack->ct_general.use, 1);
conntrack->ct_general.destroy = destroy_conntrack;
conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple = *orig;
conntrack->tuplehash[IP_CT_DIR_REPLY].tuple = *repl;
/* Don't set timer yet: wait for confirmation */
@ -1122,6 +1121,8 @@ void nf_conntrack_cleanup(void)
while (atomic_read(&nf_conntrack_untracked.ct_general.use) > 1)
schedule();
rcu_assign_pointer(nf_ct_destroy, NULL);
for (i = 0; i < NF_CT_F_NUM; i++) {
if (nf_ct_cache[i].use == 0)
continue;
@ -1259,6 +1260,7 @@ int __init nf_conntrack_init(void)
/* For use by REJECT target */
rcu_assign_pointer(ip_ct_attach, __nf_conntrack_attach);
rcu_assign_pointer(nf_ct_destroy, destroy_conntrack);
/* Set up fake conntrack:
- to never be deleted, not in any hashes */