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netfilter: nf_ct_tcp: merge tcpv[4,6]_net_init into tcp_net_init

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Merge tcpv4_net_init and tcpv6_net_init into tcp_net_init to
remove redundant code now that we have the u_int16_t proto
parameter.

And use nf_proto_net.users to identify if it's the first time
we use the nf_proto_net, in that case, we initialize it.

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 04:36:43 +00:00 • committed by Pablo Neira Ayuso
parent 12c26df35e
commit efa758fe2c
1 changed files with 21 additions and 50 deletions
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71
net/netfilter/nf_conntrack_proto_tcp.c
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@ -1533,11 +1533,10 @@ static struct ctl_table tcp_compat_sysctl_table[] = {
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */ #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */ #endif /* CONFIG_SYSCTL */
static int tcp_kmemdup_sysctl_table(struct nf_proto_net *pn) static int tcp_kmemdup_sysctl_table(struct nf_proto_net *pn,
struct nf_tcp_net *tn)
{ {
#ifdef CONFIG_SYSCTL #ifdef CONFIG_SYSCTL
struct nf_tcp_net *tn = (struct nf_tcp_net *)pn;
if (pn->ctl_table) if (pn->ctl_table)
return 0; return 0;
@ -1564,11 +1563,11 @@ static int tcp_kmemdup_sysctl_table(struct nf_proto_net *pn)
return 0; return 0;
} }
static int tcp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn) static int tcp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn,
struct nf_tcp_net *tn)
{ {
#ifdef CONFIG_SYSCTL #ifdef CONFIG_SYSCTL
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
struct nf_tcp_net *tn = (struct nf_tcp_net *)pn;
pn->ctl_compat_table = kmemdup(tcp_compat_sysctl_table, pn->ctl_compat_table = kmemdup(tcp_compat_sysctl_table,
sizeof(tcp_compat_sysctl_table), sizeof(tcp_compat_sysctl_table),
GFP_KERNEL); GFP_KERNEL);
@ -1593,18 +1592,15 @@ static int tcp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn)
return 0; return 0;
} }
static int tcpv4_init_net(struct net *net, u_int16_t proto) static int tcp_init_net(struct net *net, u_int16_t proto)
{ {
int i; int ret;
int ret = 0;
struct nf_tcp_net *tn = tcp_pernet(net); struct nf_tcp_net *tn = tcp_pernet(net);
struct nf_proto_net *pn = (struct nf_proto_net *)tn; struct nf_proto_net *pn = &tn->pn;
if (!pn->users) {
int i;
#ifdef CONFIG_SYSCTL
if (!pn->ctl_table) {
#else
if (!pn->users++) {
#endif
for (i = 0; i < TCP_CONNTRACK_TIMEOUT_MAX; i++) for (i = 0; i < TCP_CONNTRACK_TIMEOUT_MAX; i++)
tn->timeouts[i] = tcp_timeouts[i]; tn->timeouts[i] = tcp_timeouts[i];
@ -1613,45 +1609,20 @@ static int tcpv4_init_net(struct net *net, u_int16_t proto)
tn->tcp_max_retrans = nf_ct_tcp_max_retrans; tn->tcp_max_retrans = nf_ct_tcp_max_retrans;
} }
ret = tcp_kmemdup_compat_sysctl_table(pn); if (proto == AF_INET) {
ret = tcp_kmemdup_compat_sysctl_table(pn, tn);
if (ret < 0)
return ret;
if (ret < 0) ret = tcp_kmemdup_sysctl_table(pn, tn);
return ret; if (ret < 0)
nf_ct_kfree_compat_sysctl_table(pn);
} else
ret = tcp_kmemdup_sysctl_table(pn, tn);
ret = tcp_kmemdup_sysctl_table(pn);
#ifdef CONFIG_SYSCTL
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
if (ret < 0) {
kfree(pn->ctl_compat_table);
pn->ctl_compat_table = NULL;
}
#endif
#endif
return ret; return ret;
} }
static int tcpv6_init_net(struct net *net, u_int16_t proto)
{
int i;
struct nf_tcp_net *tn = tcp_pernet(net);
struct nf_proto_net *pn = (struct nf_proto_net *)tn;
#ifdef CONFIG_SYSCTL
if (!pn->ctl_table) {
#else
if (!pn->users++) {
#endif
for (i = 0; i < TCP_CONNTRACK_TIMEOUT_MAX; i++)
tn->timeouts[i] = tcp_timeouts[i];
tn->tcp_loose = nf_ct_tcp_loose;
tn->tcp_be_liberal = nf_ct_tcp_be_liberal;
tn->tcp_max_retrans = nf_ct_tcp_max_retrans;
}
return tcp_kmemdup_sysctl_table(pn);
}
struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4 __read_mostly = struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4 __read_mostly =
{ {
.l3proto = PF_INET, .l3proto = PF_INET,
@ -1684,7 +1655,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4 __read_mostly =
.nla_policy = tcp_timeout_nla_policy, .nla_policy = tcp_timeout_nla_policy,
}, },
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
.init_net = tcpv4_init_net, .init_net = tcp_init_net,
}; };
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_tcp4); EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_tcp4);
@ -1720,6 +1691,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6 __read_mostly =
.nla_policy = tcp_timeout_nla_policy, .nla_policy = tcp_timeout_nla_policy,
}, },
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
.init_net = tcpv6_init_net, .init_net = tcp_init_net,
}; };
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_tcp6); EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_tcp6);