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netfilter: remove CONFIG_NETFILTER checks from headers. 

`struct nf_hook_ops`, `struct nf_hook_state` and the `nf_hookfn`
function typedef appear in function and struct declarations and
definitions in a number of netfilter headers.  The structs and typedef
themselves are defined by linux/netfilter.h but only when
CONFIG_NETFILTER is enabled.  Define them unconditionally and add
forward declarations in order to remove CONFIG_NETFILTER conditionals
from the other headers.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jeremy Sowden 2019-09-13 09:13:16 +01:00 committed by Pablo Neira Ayuso
parent 51a21be42a
commit f19438bdd4
16 changed files with 10 additions and 56 deletions
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2
include/linux/netfilter.h
View File

@ -15,7 +15,6 @@
#include <linux/netdevice.h>
#include <net/net_namespace.h>
#ifdef CONFIG_NETFILTER
static inline int NF_DROP_GETERR(int verdict)
{
return -(verdict >> NF_VERDICT_QBITS);
@ -118,6 +117,7 @@ struct nf_hook_entries {
*/
};
#ifdef CONFIG_NETFILTER
static inline struct nf_hook_ops **nf_hook_entries_get_hook_ops(const struct nf_hook_entries *e)
{
unsigned int n = e->num_hook_entries;

6
include/linux/netfilter/x_tables.h
View File

@ -35,15 +35,12 @@ struct xt_action_param {
union {
const void *matchinfo, *targinfo;
};
#if IS_ENABLED(CONFIG_NETFILTER)
const struct nf_hook_state *state;
#endif
int fragoff;
unsigned int thoff;
bool hotdrop;
};
#if IS_ENABLED(CONFIG_NETFILTER)
static inline struct net *xt_net(const struct xt_action_param *par)
{
return par->state->net;
@ -78,7 +75,6 @@ static inline u_int8_t xt_family(const struct xt_action_param *par)
{
return par->state->pf;
}
#endif
/**
* struct xt_mtchk_param - parameters for match extensions'
@ -450,9 +446,7 @@ xt_get_per_cpu_counter(struct xt_counters *cnt, unsigned int cpu)
return cnt;
}
#if IS_ENABLED(CONFIG_NETFILTER)
struct nf_hook_ops *xt_hook_ops_alloc(const struct xt_table *, nf_hookfn *);
#endif
#ifdef CONFIG_COMPAT
#include <net/compat.h>

2
include/linux/netfilter_arp/arp_tables.h
View File

@ -49,7 +49,6 @@ struct arpt_error {
}
extern void *arpt_alloc_initial_table(const struct xt_table *);
#if IS_ENABLED(CONFIG_NETFILTER)
int arpt_register_table(struct net *net, const struct xt_table *table,
const struct arpt_replace *repl,
const struct nf_hook_ops *ops, struct xt_table **res);
@ -58,7 +57,6 @@ void arpt_unregister_table(struct net *net, struct xt_table *table,
extern unsigned int arpt_do_table(struct sk_buff *skb,
const struct nf_hook_state *state,
struct xt_table *table);
#endif
#ifdef CONFIG_COMPAT
#include <net/compat.h>

3
include/linux/netfilter_bridge/ebtables.h
View File

@ -105,7 +105,7 @@ struct ebt_table {
#define EBT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) & \
~(__alignof__(struct _xt_align)-1))
#if IS_ENABLED(CONFIG_NETFILTER)
extern int ebt_register_table(struct net *net,
const struct ebt_table *table,
const struct nf_hook_ops *ops,
@ -115,7 +115,6 @@ extern void ebt_unregister_table(struct net *net, struct ebt_table *table,
extern unsigned int ebt_do_table(struct sk_buff *skb,
const struct nf_hook_state *state,
struct ebt_table *table);
#endif
/* True if the hook mask denotes that the rule is in a base chain,
* used in the check() functions */

7
include/linux/netfilter_ipv4/ip_tables.h
View File

@ -17,19 +17,16 @@
#include <linux/if.h>
#include <linux/in.h>
#include <linux/init.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <uapi/linux/netfilter_ipv4/ip_tables.h>
#if IS_ENABLED(CONFIG_NETFILTER)
int ipt_register_table(struct net *net, const struct xt_table *table,
const struct ipt_replace *repl,
const struct nf_hook_ops *ops, struct xt_table **res);
void ipt_unregister_table(struct net *net, struct xt_table *table,
const struct nf_hook_ops *ops);
#endif
/* Standard entry. */
struct ipt_standard {
@ -65,11 +62,9 @@ struct ipt_error {
}
extern void *ipt_alloc_initial_table(const struct xt_table *);
#if IS_ENABLED(CONFIG_NETFILTER)
extern unsigned int ipt_do_table(struct sk_buff *skb,
const struct nf_hook_state *state,
struct xt_table *table);
#endif
#ifdef CONFIG_COMPAT
#include <net/compat.h>

5
include/linux/netfilter_ipv6/ip6_tables.h
View File

@ -17,15 +17,13 @@
#include <linux/if.h>
#include <linux/in6.h>
#include <linux/init.h>
#include <linux/ipv6.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <uapi/linux/netfilter_ipv6/ip6_tables.h>
extern void *ip6t_alloc_initial_table(const struct xt_table *);
#if IS_ENABLED(CONFIG_NETFILTER)
int ip6t_register_table(struct net *net, const struct xt_table *table,
const struct ip6t_replace *repl,
const struct nf_hook_ops *ops, struct xt_table **res);
@ -34,7 +32,6 @@ void ip6t_unregister_table(struct net *net, struct xt_table *table,
extern unsigned int ip6t_do_table(struct sk_buff *skb,
const struct nf_hook_state *state,
struct xt_table *table);
#endif
#ifdef CONFIG_COMPAT
#include <net/compat.h>

2
include/net/netfilter/br_netfilter.h
View File

@ -55,7 +55,6 @@ static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
struct net_device *setup_pre_routing(struct sk_buff *skb,
const struct net *net);
#if IS_ENABLED(CONFIG_NETFILTER)
#if IS_ENABLED(CONFIG_IPV6)
int br_validate_ipv6(struct net *net, struct sk_buff *skb);
unsigned int br_nf_pre_routing_ipv6(void *priv,
@ -74,6 +73,5 @@ br_nf_pre_routing_ipv6(void *priv, struct sk_buff *skb,
return NF_ACCEPT;
}
#endif
#endif
#endif /* _BR_NETFILTER_H_ */

4
include/net/netfilter/nf_conntrack_bridge.h
View File

@ -5,10 +5,10 @@
#include <linux/types.h>
#include <uapi/linux/if_ether.h>
struct nf_hook_ops;
struct nf_ct_bridge_info {
#if IS_ENABLED(CONFIG_NETFILTER)
struct nf_hook_ops *ops;
#endif
unsigned int ops_size;
struct module *me;
};

5
include/net/netfilter/nf_conntrack_core.h
View File

@ -22,9 +22,8 @@
standalone connection tracking module, and the compatibility layer's use
of connection tracking. */
#if IS_ENABLED(CONFIG_NETFILTER)
unsigned int nf_conntrack_in(struct sk_buff *skb, const struct nf_hook_state *state);
#endif
unsigned int nf_conntrack_in(struct sk_buff *skb,
const struct nf_hook_state *state);
int nf_conntrack_init_net(struct net *net);
void nf_conntrack_cleanup_net(struct net *net);

2
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -75,7 +75,6 @@ bool nf_conntrack_invert_icmp_tuple(struct nf_conntrack_tuple *tuple,
bool nf_conntrack_invert_icmpv6_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig);
#if IS_ENABLED(CONFIG_NETFILTER)
int nf_conntrack_inet_error(struct nf_conn *tmpl, struct sk_buff *skb,
unsigned int dataoff,
const struct nf_hook_state *state,
@ -132,7 +131,6 @@ int nf_conntrack_gre_packet(struct nf_conn *ct,
unsigned int dataoff,
enum ip_conntrack_info ctinfo,
const struct nf_hook_state *state);
#endif
void nf_conntrack_generic_init_net(struct net *net);
void nf_conntrack_tcp_init_net(struct net *net);

2
include/net/netfilter/nf_conntrack_tuple.h
View File

@ -121,7 +121,6 @@ struct nf_conntrack_tuple_hash {
struct nf_conntrack_tuple tuple;
};
#if IS_ENABLED(CONFIG_NETFILTER)
static inline bool __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
const struct nf_conntrack_tuple *t2)
{
@ -184,6 +183,5 @@ nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
return nf_ct_tuple_src_mask_cmp(t, tuple, mask) &&
__nf_ct_tuple_dst_equal(t, tuple);
}
#endif
#endif /* _NF_CONNTRACK_TUPLE_H */

4
include/net/netfilter/nf_flow_table.h
View File

@ -17,9 +17,7 @@ struct nf_flowtable_type {
int family;
int (*init)(struct nf_flowtable *ft);
void (*free)(struct nf_flowtable *ft);
#if IS_ENABLED(CONFIG_NETFILTER)
nf_hookfn *hook;
#endif
struct module *owner;
};
@ -117,12 +115,10 @@ struct flow_ports {
__be16 source, dest;
};
#if IS_ENABLED(CONFIG_NETFILTER)
unsigned int nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state);
unsigned int nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state);
#endif
#define MODULE_ALIAS_NF_FLOWTABLE(family) \
MODULE_ALIAS("nf-flowtable-" __stringify(family))

4
include/net/netfilter/nf_nat.h
View File

@ -68,12 +68,10 @@ static inline bool nf_nat_oif_changed(unsigned int hooknum,
#endif
}
#if IS_ENABLED(CONFIG_NETFILTER)
int nf_nat_register_fn(struct net *net, u8 pf, const struct nf_hook_ops *ops,
const struct nf_hook_ops *nat_ops, unsigned int ops_count);
void nf_nat_unregister_fn(struct net *net, u8 pf, const struct nf_hook_ops *ops,
unsigned int ops_count);
#endif
unsigned int nf_nat_packet(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
unsigned int hooknum, struct sk_buff *skb);
@ -93,7 +91,6 @@ int nf_nat_icmpv6_reply_translation(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned int hooknum, unsigned int hdrlen);
#if IS_ENABLED(CONFIG_NETFILTER)
int nf_nat_ipv4_register_fn(struct net *net, const struct nf_hook_ops *ops);
void nf_nat_ipv4_unregister_fn(struct net *net, const struct nf_hook_ops *ops);
@ -106,7 +103,6 @@ void nf_nat_inet_unregister_fn(struct net *net, const struct nf_hook_ops *ops);
unsigned int
nf_nat_inet_fn(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state);
#endif
int nf_xfrm_me_harder(struct net *n, struct sk_buff *s, unsigned int family);

4
include/net/netfilter/nf_queue.h
View File

@ -15,9 +15,7 @@ struct nf_queue_entry {
unsigned int id;
unsigned int hook_index; /* index in hook_entries->hook[] */
#if IS_ENABLED(CONFIG_NETFILTER)
struct nf_hook_state state;
#endif
u16 size; /* sizeof(entry) + saved route keys */
/* extra space to store route keys */
@ -123,9 +121,7 @@ nfqueue_hash(const struct sk_buff *skb, u16 queue, u16 queues_total, u8 family,
return queue;
}
#if IS_ENABLED(CONFIG_NETFILTER)
int nf_queue(struct sk_buff *skb, struct nf_hook_state *state,
unsigned int index, unsigned int verdict);
#endif
#endif /* _NF_QUEUE_H */

6
include/net/netfilter/nf_synproxy.h
View File

@ -58,10 +58,10 @@ bool synproxy_recv_client_ack(struct net *net,
const struct tcphdr *th,
struct synproxy_options *opts, u32 recv_seq);
#if IS_ENABLED(CONFIG_NETFILTER)
struct nf_hook_state;
unsigned int ipv4_synproxy_hook(void *priv, struct sk_buff *skb,
const struct nf_hook_state *nhs);
#endif
int nf_synproxy_ipv4_init(struct synproxy_net *snet, struct net *net);
void nf_synproxy_ipv4_fini(struct synproxy_net *snet, struct net *net);
@ -75,10 +75,8 @@ bool synproxy_recv_client_ack_ipv6(struct net *net, const struct sk_buff *skb,
const struct tcphdr *th,
struct synproxy_options *opts, u32 recv_seq);
#if IS_ENABLED(CONFIG_NETFILTER)
unsigned int ipv6_synproxy_hook(void *priv, struct sk_buff *skb,
const struct nf_hook_state *nhs);
#endif
int nf_synproxy_ipv6_init(struct synproxy_net *snet, struct net *net);
void nf_synproxy_ipv6_fini(struct synproxy_net *snet, struct net *net);
#else

8
include/net/netfilter/nf_tables.h
View File

@ -26,7 +26,6 @@ struct nft_pktinfo {
struct xt_action_param xt;
};
#if IS_ENABLED(CONFIG_NETFILTER)
static inline struct net *nft_net(const struct nft_pktinfo *pkt)
{
return pkt->xt.state->net;
@ -59,7 +58,6 @@ static inline void nft_set_pktinfo(struct nft_pktinfo *pkt,
pkt->skb = skb;
pkt->xt.state = state;
}
#endif
static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt,
struct sk_buff *skb)
@ -947,11 +945,9 @@ struct nft_chain_type {
int family;
struct module *owner;
unsigned int hook_mask;
#if IS_ENABLED(CONFIG_NETFILTER)
nf_hookfn *hooks[NF_MAX_HOOKS];
int (*ops_register)(struct net *net, const struct nf_hook_ops *ops);
void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops);
#endif
};
int nft_chain_validate_dependency(const struct nft_chain *chain,
@ -977,9 +973,7 @@ struct nft_stats {
* @flow_block: flow block (for hardware offload)
*/
struct nft_base_chain {
#if IS_ENABLED(CONFIG_NETFILTER)
struct nf_hook_ops ops;
#endif
const struct nft_chain_type *type;
u8 policy;
u8 flags;
@ -1179,9 +1173,7 @@ struct nft_flowtable {
use:30;
u64 handle;
/* runtime data below here */
#if IS_ENABLED(CONFIG_NETFILTER)
struct nf_hook_ops *ops ____cacheline_aligned;
#endif
struct nf_flowtable data;
};