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[NETFILTER]: nf_conntrack: support for layer 3 protocol load on demand

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x_tables matches and targets that require nf_conntrack_ipv[4|6] to work
don't have enough information to load on demand these modules. This
patch introduces the following changes to solve this issue:

o nf_ct_l3proto_try_module_get: try to load the layer 3 connection
tracker module and increases the refcount.
o nf_ct_l3proto_module put: drop the refcount of the module.

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
2006-03-22 13:56:08 -08:00
committed by David S. Miller
parent a45049c51c
commit b9f78f9fca
9 changed files with 130 additions and 0 deletions
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4
include/net/netfilter/nf_conntrack.h
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@ -195,6 +195,10 @@ static inline void nf_ct_put(struct nf_conn *ct)
nf_conntrack_put(&ct->ct_general);
}
/* Protocol module loading */
extern int nf_ct_l3proto_try_module_get(unsigned short l3proto);
extern void nf_ct_l3proto_module_put(unsigned short l3proto);
extern struct nf_conntrack_tuple_hash *
__nf_conntrack_find(const struct nf_conntrack_tuple *tuple,
const struct nf_conn *ignored_conntrack);