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netfilter: nft_ct: load both IPv4 and IPv6 conntrack modules for NFPROTO_INET

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The ct expression can currently not be used in the inet family since
we don't have a conntrack module for NFPROTO_INET, so
nf_ct_l3proto_try_module_get() fails. Add some manual handling to
load the modules for both NFPROTO_IPV4 and NFPROTO_IPV6 if the
ct expression is used in the inet family.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Patrick McHardy 2014-01-06 18:09:49 +00:00 committed by Pablo Neira Ayuso
parent 4566bf2706
commit 9638f33ecf
1 changed files with 36 additions and 3 deletions
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39
net/netfilter/nft_ct.c
View file

@ -129,6 +129,39 @@ static const struct nla_policy nft_ct_policy[NFTA_CT_MAX + 1] = {
[NFTA_CT_DIRECTION] = { .type = NLA_U8 },
};
static int nft_ct_l3proto_try_module_get(uint8_t family)
{
int err;
if (family == NFPROTO_INET) {
err = nf_ct_l3proto_try_module_get(NFPROTO_IPV4);
if (err < 0)
goto err1;
err = nf_ct_l3proto_try_module_get(NFPROTO_IPV6);
if (err < 0)
goto err2;
} else {
err = nf_ct_l3proto_try_module_get(family);
if (err < 0)
goto err1;
}
return 0;
err2:
nf_ct_l3proto_module_put(NFPROTO_IPV4);
err1:
return err;
}
static void nft_ct_l3proto_module_put(uint8_t family)
{
if (family == NFPROTO_INET) {
nf_ct_l3proto_module_put(NFPROTO_IPV4);
nf_ct_l3proto_module_put(NFPROTO_IPV6);
} else
nf_ct_l3proto_module_put(family);
}
static int nft_ct_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
@ -179,7 +212,7 @@ static int nft_ct_init(const struct nft_ctx *ctx,
return -EOPNOTSUPP;
}
err = nf_ct_l3proto_try_module_get(ctx->afi->family);
err = nft_ct_l3proto_try_module_get(ctx->afi->family);
if (err < 0)
return err;
priv->family = ctx->afi->family;
@ -195,7 +228,7 @@ static int nft_ct_init(const struct nft_ctx *ctx,
return 0;
err1:
nf_ct_l3proto_module_put(ctx->afi->family);
nft_ct_l3proto_module_put(ctx->afi->family);
return err;
}
@ -203,7 +236,7 @@ static void nft_ct_destroy(const struct nft_expr *expr)
{
struct nft_ct *priv = nft_expr_priv(expr);
nf_ct_l3proto_module_put(priv->family);
nft_ct_l3proto_module_put(priv->family);
}
static int nft_ct_dump(struct sk_buff *skb, const struct nft_expr *expr)