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netfilter: nf_ct_icmp: add icmp_kmemdup[_compat]_sysctl_table function

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Split sysctl function into smaller chucks to cleanup code and prepare
patches to reduce ifdef pollution.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Gao feng 2012-06-21 04:36:49 +00:00 committed by Pablo Neira Ayuso
parent 54b8873f7c
commit a9082b45ad
1 changed files with 32 additions and 9 deletions
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41
net/ipv4/netfilter/nf_conntrack_proto_icmp.c
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@ -337,34 +337,57 @@ static struct ctl_table icmp_compat_sysctl_table[] = {
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */
static int icmp_init_net(struct net *net, u_int16_t proto)
static int icmp_kmemdup_sysctl_table(struct nf_proto_net *pn,
struct nf_icmp_net *in)
{
struct nf_icmp_net *in = icmp_pernet(net);
struct nf_proto_net *pn = (struct nf_proto_net *)in;
in->timeout = nf_ct_icmp_timeout;
#ifdef CONFIG_SYSCTL
pn->ctl_table = kmemdup(icmp_sysctl_table,
sizeof(icmp_sysctl_table),
GFP_KERNEL);
if (!pn->ctl_table)
return -ENOMEM;
pn->ctl_table[0].data = &in->timeout;
#endif
return 0;
}
static int icmp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn,
struct nf_icmp_net *in)
{
#ifdef CONFIG_SYSCTL
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
pn->ctl_compat_table = kmemdup(icmp_compat_sysctl_table,
sizeof(icmp_compat_sysctl_table),
GFP_KERNEL);
if (!pn->ctl_compat_table) {
kfree(pn->ctl_table);
pn->ctl_table = NULL;
if (!pn->ctl_compat_table)
return -ENOMEM;
}
pn->ctl_compat_table[0].data = &in->timeout;
#endif
#endif
return 0;
}
static int icmp_init_net(struct net *net, u_int16_t proto)
{
int ret;
struct nf_icmp_net *in = icmp_pernet(net);
struct nf_proto_net *pn = &in->pn;
in->timeout = nf_ct_icmp_timeout;
ret = icmp_kmemdup_compat_sysctl_table(pn, in);
if (ret < 0)
return ret;
ret = icmp_kmemdup_sysctl_table(pn, in);
if (ret < 0)
nf_ct_kfree_compat_sysctl_table(pn);
return ret;
}
struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp __read_mostly =
{
.l3proto = PF_INET,