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Diffstat (limited to 'net/netfilter/nf_conntrack_proto_tcp.c')
-rw-r--r--net/netfilter/nf_conntrack_proto_tcp.c163
1 files changed, 116 insertions, 47 deletions
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 21ff1a99f534..a5ac11ebef33 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -270,6 +270,11 @@ static const u8 tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
}
};
+static inline struct nf_tcp_net *tcp_pernet(struct net *net)
+{
+ return &net->ct.nf_ct_proto.tcp;
+}
+
static bool tcp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
struct nf_conntrack_tuple *tuple)
{
@@ -516,6 +521,7 @@ static bool tcp_in_window(const struct nf_conn *ct,
u_int8_t pf)
{
struct net *net = nf_ct_net(ct);
+ struct nf_tcp_net *tn = tcp_pernet(net);
struct ip_ct_tcp_state *sender = &state->seen[dir];
struct ip_ct_tcp_state *receiver = &state->seen[!dir];
const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple;
@@ -720,7 +726,7 @@ static bool tcp_in_window(const struct nf_conn *ct,
} else {
res = false;
if (sender->flags & IP_CT_TCP_FLAG_BE_LIBERAL ||
- nf_ct_tcp_be_liberal)
+ tn->tcp_be_liberal)
res = true;
if (!res && LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
@@ -815,7 +821,7 @@ static int tcp_error(struct net *net, struct nf_conn *tmpl,
static unsigned int *tcp_get_timeouts(struct net *net)
{
- return tcp_timeouts;
+ return tcp_pernet(net)->timeouts;
}
/* Returns verdict for packet, or -1 for invalid. */
@@ -828,6 +834,7 @@ static int tcp_packet(struct nf_conn *ct,
unsigned int *timeouts)
{
struct net *net = nf_ct_net(ct);
+ struct nf_tcp_net *tn = tcp_pernet(net);
struct nf_conntrack_tuple *tuple;
enum tcp_conntrack new_state, old_state;
enum ip_conntrack_dir dir;
@@ -1020,7 +1027,7 @@ static int tcp_packet(struct nf_conn *ct,
&& new_state == TCP_CONNTRACK_FIN_WAIT)
ct->proto.tcp.seen[dir].flags |= IP_CT_TCP_FLAG_CLOSE_INIT;
- if (ct->proto.tcp.retrans >= nf_ct_tcp_max_retrans &&
+ if (ct->proto.tcp.retrans >= tn->tcp_max_retrans &&
timeouts[new_state] > timeouts[TCP_CONNTRACK_RETRANS])
timeout = timeouts[TCP_CONNTRACK_RETRANS];
else if ((ct->proto.tcp.seen[0].flags | ct->proto.tcp.seen[1].flags) &
@@ -1065,6 +1072,8 @@ static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb,
enum tcp_conntrack new_state;
const struct tcphdr *th;
struct tcphdr _tcph;
+ struct net *net = nf_ct_net(ct);
+ struct nf_tcp_net *tn = tcp_pernet(net);
const struct ip_ct_tcp_state *sender = &ct->proto.tcp.seen[0];
const struct ip_ct_tcp_state *receiver = &ct->proto.tcp.seen[1];
@@ -1093,7 +1102,7 @@ static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb,
ct->proto.tcp.seen[0].td_end;
tcp_options(skb, dataoff, th, &ct->proto.tcp.seen[0]);
- } else if (nf_ct_tcp_loose == 0) {
+ } else if (tn->tcp_loose == 0) {
/* Don't try to pick up connections. */
return false;
} else {
@@ -1251,14 +1260,16 @@ static int tcp_nlattr_tuple_size(void)
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_cttimeout.h>
-static int tcp_timeout_nlattr_to_obj(struct nlattr *tb[], void *data)
+static int tcp_timeout_nlattr_to_obj(struct nlattr *tb[],
+ struct net *net, void *data)
{
unsigned int *timeouts = data;
+ struct nf_tcp_net *tn = tcp_pernet(net);
int i;
/* set default TCP timeouts. */
for (i=0; i<TCP_CONNTRACK_TIMEOUT_MAX; i++)
- timeouts[i] = tcp_timeouts[i];
+ timeouts[i] = tn->timeouts[i];
if (tb[CTA_TIMEOUT_TCP_SYN_SENT]) {
timeouts[TCP_CONNTRACK_SYN_SENT] =
@@ -1355,96 +1366,81 @@ static const struct nla_policy tcp_timeout_nla_policy[CTA_TIMEOUT_TCP_MAX+1] = {
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
#ifdef CONFIG_SYSCTL
-static unsigned int tcp_sysctl_table_users;
-static struct ctl_table_header *tcp_sysctl_header;
static struct ctl_table tcp_sysctl_table[] = {
{
.procname = "nf_conntrack_tcp_timeout_syn_sent",
- .data = &tcp_timeouts[TCP_CONNTRACK_SYN_SENT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_syn_recv",
- .data = &tcp_timeouts[TCP_CONNTRACK_SYN_RECV],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_established",
- .data = &tcp_timeouts[TCP_CONNTRACK_ESTABLISHED],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_fin_wait",
- .data = &tcp_timeouts[TCP_CONNTRACK_FIN_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_close_wait",
- .data = &tcp_timeouts[TCP_CONNTRACK_CLOSE_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_last_ack",
- .data = &tcp_timeouts[TCP_CONNTRACK_LAST_ACK],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_time_wait",
- .data = &tcp_timeouts[TCP_CONNTRACK_TIME_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_close",
- .data = &tcp_timeouts[TCP_CONNTRACK_CLOSE],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_max_retrans",
- .data = &tcp_timeouts[TCP_CONNTRACK_RETRANS],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_unacknowledged",
- .data = &tcp_timeouts[TCP_CONNTRACK_UNACK],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_loose",
- .data = &nf_ct_tcp_loose,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "nf_conntrack_tcp_be_liberal",
- .data = &nf_ct_tcp_be_liberal,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "nf_conntrack_tcp_max_retrans",
- .data = &nf_ct_tcp_max_retrans,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec,
@@ -1456,91 +1452,78 @@ static struct ctl_table tcp_sysctl_table[] = {
static struct ctl_table tcp_compat_sysctl_table[] = {
{
.procname = "ip_conntrack_tcp_timeout_syn_sent",
- .data = &tcp_timeouts[TCP_CONNTRACK_SYN_SENT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_syn_sent2",
- .data = &tcp_timeouts[TCP_CONNTRACK_SYN_SENT2],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_syn_recv",
- .data = &tcp_timeouts[TCP_CONNTRACK_SYN_RECV],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_established",
- .data = &tcp_timeouts[TCP_CONNTRACK_ESTABLISHED],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_fin_wait",
- .data = &tcp_timeouts[TCP_CONNTRACK_FIN_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_close_wait",
- .data = &tcp_timeouts[TCP_CONNTRACK_CLOSE_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_last_ack",
- .data = &tcp_timeouts[TCP_CONNTRACK_LAST_ACK],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_time_wait",
- .data = &tcp_timeouts[TCP_CONNTRACK_TIME_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_close",
- .data = &tcp_timeouts[TCP_CONNTRACK_CLOSE],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_max_retrans",
- .data = &tcp_timeouts[TCP_CONNTRACK_RETRANS],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_loose",
- .data = &nf_ct_tcp_loose,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "ip_conntrack_tcp_be_liberal",
- .data = &nf_ct_tcp_be_liberal,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "ip_conntrack_tcp_max_retrans",
- .data = &nf_ct_tcp_max_retrans,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec,
@@ -1550,6 +1533,101 @@ static struct ctl_table tcp_compat_sysctl_table[] = {
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */
+static int tcp_kmemdup_sysctl_table(struct nf_proto_net *pn,
+ struct nf_tcp_net *tn)
+{
+#ifdef CONFIG_SYSCTL
+ if (pn->ctl_table)
+ return 0;
+
+ pn->ctl_table = kmemdup(tcp_sysctl_table,
+ sizeof(tcp_sysctl_table),
+ GFP_KERNEL);
+ if (!pn->ctl_table)
+ return -ENOMEM;
+
+ pn->ctl_table[0].data = &tn->timeouts[TCP_CONNTRACK_SYN_SENT];
+ pn->ctl_table[1].data = &tn->timeouts[TCP_CONNTRACK_SYN_RECV];
+ pn->ctl_table[2].data = &tn->timeouts[TCP_CONNTRACK_ESTABLISHED];
+ pn->ctl_table[3].data = &tn->timeouts[TCP_CONNTRACK_FIN_WAIT];
+ pn->ctl_table[4].data = &tn->timeouts[TCP_CONNTRACK_CLOSE_WAIT];
+ pn->ctl_table[5].data = &tn->timeouts[TCP_CONNTRACK_LAST_ACK];
+ pn->ctl_table[6].data = &tn->timeouts[TCP_CONNTRACK_TIME_WAIT];
+ pn->ctl_table[7].data = &tn->timeouts[TCP_CONNTRACK_CLOSE];
+ pn->ctl_table[8].data = &tn->timeouts[TCP_CONNTRACK_RETRANS];
+ pn->ctl_table[9].data = &tn->timeouts[TCP_CONNTRACK_UNACK];
+ pn->ctl_table[10].data = &tn->tcp_loose;
+ pn->ctl_table[11].data = &tn->tcp_be_liberal;
+ pn->ctl_table[12].data = &tn->tcp_max_retrans;
+#endif
+ return 0;
+}
+
+static int tcp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn,
+ struct nf_tcp_net *tn)
+{
+#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
+ pn->ctl_compat_table = kmemdup(tcp_compat_sysctl_table,
+ sizeof(tcp_compat_sysctl_table),
+ GFP_KERNEL);
+ if (!pn->ctl_compat_table)
+ return -ENOMEM;
+
+ pn->ctl_compat_table[0].data = &tn->timeouts[TCP_CONNTRACK_SYN_SENT];
+ pn->ctl_compat_table[1].data = &tn->timeouts[TCP_CONNTRACK_SYN_SENT2];
+ pn->ctl_compat_table[2].data = &tn->timeouts[TCP_CONNTRACK_SYN_RECV];
+ pn->ctl_compat_table[3].data = &tn->timeouts[TCP_CONNTRACK_ESTABLISHED];
+ pn->ctl_compat_table[4].data = &tn->timeouts[TCP_CONNTRACK_FIN_WAIT];
+ pn->ctl_compat_table[5].data = &tn->timeouts[TCP_CONNTRACK_CLOSE_WAIT];
+ pn->ctl_compat_table[6].data = &tn->timeouts[TCP_CONNTRACK_LAST_ACK];
+ pn->ctl_compat_table[7].data = &tn->timeouts[TCP_CONNTRACK_TIME_WAIT];
+ pn->ctl_compat_table[8].data = &tn->timeouts[TCP_CONNTRACK_CLOSE];
+ pn->ctl_compat_table[9].data = &tn->timeouts[TCP_CONNTRACK_RETRANS];
+ pn->ctl_compat_table[10].data = &tn->tcp_loose;
+ pn->ctl_compat_table[11].data = &tn->tcp_be_liberal;
+ pn->ctl_compat_table[12].data = &tn->tcp_max_retrans;
+#endif
+#endif
+ return 0;
+}
+
+static int tcp_init_net(struct net *net, u_int16_t proto)
+{
+ int ret;
+ struct nf_tcp_net *tn = tcp_pernet(net);
+ struct nf_proto_net *pn = &tn->pn;
+
+ if (!pn->users) {
+ int i;
+
+ 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;
+ }
+
+ if (proto == AF_INET) {
+ ret = tcp_kmemdup_compat_sysctl_table(pn, tn);
+ if (ret < 0)
+ return ret;
+
+ ret = tcp_kmemdup_sysctl_table(pn, tn);
+ if (ret < 0)
+ nf_ct_kfree_compat_sysctl_table(pn);
+ } else
+ ret = tcp_kmemdup_sysctl_table(pn, tn);
+
+ return ret;
+}
+
+static struct nf_proto_net *tcp_get_net_proto(struct net *net)
+{
+ return &net->ct.nf_ct_proto.tcp.pn;
+}
+
struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4 __read_mostly =
{
.l3proto = PF_INET,
@@ -1582,14 +1660,8 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4 __read_mostly =
.nla_policy = tcp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
-#ifdef CONFIG_SYSCTL
- .ctl_table_users = &tcp_sysctl_table_users,
- .ctl_table_header = &tcp_sysctl_header,
- .ctl_table = tcp_sysctl_table,
-#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
- .ctl_compat_table = tcp_compat_sysctl_table,
-#endif
-#endif
+ .init_net = tcp_init_net,
+ .get_net_proto = tcp_get_net_proto,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_tcp4);
@@ -1625,10 +1697,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6 __read_mostly =
.nla_policy = tcp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
-#ifdef CONFIG_SYSCTL
- .ctl_table_users = &tcp_sysctl_table_users,
- .ctl_table_header = &tcp_sysctl_header,
- .ctl_table = tcp_sysctl_table,
-#endif
+ .init_net = tcp_init_net,
+ .get_net_proto = tcp_get_net_proto,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_tcp6);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 14:47:12 +0000