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netfilter: ctnetlink: remove bogus module dependency between ctnetlink and nf_nat

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This patch removes the module dependency between ctnetlink and
nf_nat by means of an indirect call that is initialized when
nf_nat is loaded. Now, nf_conntrack_netlink only requires
nf_conntrack and nfnetlink.

This patch puts nfnetlink_parse_nat_setup_hook into the
nf_conntrack_core to avoid dependencies between ctnetlink,
nf_conntrack_ipv4 and nf_conntrack_ipv6.

This patch also introduces the function ctnetlink_change_nat
that is only invoked from the creation path. Actually, the
nat handling cannot be invoked from the update path since
this is not allowed. By introducing this function, we remove
the useless nat handling in the update path and we avoid
deadlock-prone code.

This patch also adds the required EAGAIN logic for nfnetlink.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso
2008-10-14 11:58:31 -07:00
committed by David S. Miller
parent 129404a1f1
commit e6a7d3c04f
6 changed files with 185 additions and 93 deletions
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8
include/net/netfilter/nf_nat_core.h
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@ -25,4 +25,12 @@ static inline int nf_nat_initialized(struct nf_conn *ct,
else
return test_bit(IPS_DST_NAT_DONE_BIT, &ct->status);
}
struct nlattr;
extern int
(*nfnetlink_parse_nat_setup_hook)(struct nf_conn *ct,
enum nf_nat_manip_type manip,
struct nlattr *attr);
#endif /* _NF_NAT_CORE_H */