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netfilter: remove struct nf_afinfo and its helper functions

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This abstraction has no clients anymore, remove it.

This is what remains from previous authors, so correct copyright
statement after recent modifications and code removal.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2017-12-09 17:05:53 +01:00
parent 464356234f
commit b3a61254d8
5 changed files with 6 additions and 65 deletions
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13
include/linux/netfilter.h
View File

@ -309,16 +309,6 @@ int skb_make_writable(struct sk_buff *skb, unsigned int writable_len);
struct flowi;
struct nf_queue_entry;
struct nf_afinfo {
unsigned short family;
};
extern const struct nf_afinfo __rcu *nf_afinfo[NFPROTO_NUMPROTO];
static inline const struct nf_afinfo *nf_get_afinfo(unsigned short family)
{
return rcu_dereference(nf_afinfo[family]);
}
__sum16 nf_checksum(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol,
unsigned short family);
@ -330,9 +320,6 @@ int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
bool strict, unsigned short family);
int nf_reroute(struct sk_buff *skb, struct nf_queue_entry *entry);
int nf_register_afinfo(const struct nf_afinfo *afinfo);
void nf_unregister_afinfo(const struct nf_afinfo *afinfo);
#include <net/flow.h>
extern void (*nf_nat_decode_session_hook)(struct sk_buff *, struct flowi *);

16
net/bridge/netfilter/nf_tables_bridge.c
View File

@ -95,30 +95,23 @@ static const struct nf_chain_type filter_bridge = {
},
};
static const struct nf_afinfo nf_br_afinfo = {
.family = AF_BRIDGE,
.route_key_size = 0,
};
static int __init nf_tables_bridge_init(void)
{
int ret;
nf_register_afinfo(&nf_br_afinfo);
ret = nft_register_chain_type(&filter_bridge);
if (ret < 0)
goto err1;
return ret;
ret = register_pernet_subsys(&nf_tables_bridge_net_ops);
if (ret < 0)
goto err2;
goto err_register_subsys;
return ret;
err2:
err_register_subsys:
nft_unregister_chain_type(&filter_bridge);
err1:
nf_unregister_afinfo(&nf_br_afinfo);
return ret;
}
@ -126,7 +119,6 @@ static void __exit nf_tables_bridge_exit(void)
{
unregister_pernet_subsys(&nf_tables_bridge_net_ops);
nft_unregister_chain_type(&filter_bridge);
nf_unregister_afinfo(&nf_br_afinfo);
}
module_init(nf_tables_bridge_init);

10
net/ipv4/netfilter.c
View File

@ -161,13 +161,3 @@ int nf_ip_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
return 0;
}
EXPORT_SYMBOL_GPL(nf_ip_route);
static const struct nf_afinfo nf_ip_afinfo = {
.family = AF_INET,
};
static int __init ipv4_netfilter_init(void)
{
return nf_register_afinfo(&nf_ip_afinfo);
}
subsys_initcall(ipv4_netfilter_init);

7
net/ipv6/netfilter.c
View File

@ -174,14 +174,10 @@ static const struct nf_ipv6_ops ipv6ops = {
.reroute = nf_ip6_reroute,
};
static const struct nf_afinfo nf_ip6_afinfo = {
.family = AF_INET6,
};
int __init ipv6_netfilter_init(void)
{
RCU_INIT_POINTER(nf_ipv6_ops, &ipv6ops);
return nf_register_afinfo(&nf_ip6_afinfo);
return 0;
}
/* This can be called from inet6_init() on errors, so it cannot
@ -190,5 +186,4 @@ int __init ipv6_netfilter_init(void)
void ipv6_netfilter_fini(void)
{
RCU_INIT_POINTER(nf_ipv6_ops, NULL);
nf_unregister_afinfo(&nf_ip6_afinfo);
}

25
net/netfilter/core.c
View File

@ -4,8 +4,7 @@
* Thanks to Rob `CmdrTaco' Malda for not influencing this code in any
* way.
*
* Rusty Russell (C)2000 -- This code is GPL.
* Patrick McHardy (c) 2006-2012
* This code is GPL.
*/
#include <linux/kernel.h>
#include <linux/netfilter.h>
@ -28,34 +27,12 @@
#include "nf_internals.h"
static DEFINE_MUTEX(afinfo_mutex);
const struct nf_afinfo __rcu *nf_afinfo[NFPROTO_NUMPROTO] __read_mostly;
EXPORT_SYMBOL(nf_afinfo);
const struct nf_ipv6_ops __rcu *nf_ipv6_ops __read_mostly;
EXPORT_SYMBOL_GPL(nf_ipv6_ops);
DEFINE_PER_CPU(bool, nf_skb_duplicated);
EXPORT_SYMBOL_GPL(nf_skb_duplicated);
int nf_register_afinfo(const struct nf_afinfo *afinfo)
{
mutex_lock(&afinfo_mutex);
RCU_INIT_POINTER(nf_afinfo[afinfo->family], afinfo);
mutex_unlock(&afinfo_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(nf_register_afinfo);
void nf_unregister_afinfo(const struct nf_afinfo *afinfo)
{
mutex_lock(&afinfo_mutex);
RCU_INIT_POINTER(nf_afinfo[afinfo->family], NULL);
mutex_unlock(&afinfo_mutex);
synchronize_rcu();
}
EXPORT_SYMBOL_GPL(nf_unregister_afinfo);
#ifdef HAVE_JUMP_LABEL
struct static_key nf_hooks_needed[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
EXPORT_SYMBOL(nf_hooks_needed);