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[NETFILTER]: nf_conntrack_tcp: remove timeout indirection 

Instead of keeping pointers to the timeout values in a table, simply
put the timeout values in the table directly.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-01-14 23:45:32 -08:00 committed by David S. Miller
parent a5e73c29d9
commit 2d6462869f
1 changed files with 28 additions and 39 deletions
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67
net/netfilter/nf_conntrack_proto_tcp.c
View File

@ -64,32 +64,21 @@ static const char *tcp_conntrack_names[] = {
#define HOURS * 60 MINS
#define DAYS * 24 HOURS
static unsigned int nf_ct_tcp_timeout_syn_sent __read_mostly = 2 MINS;
static unsigned int nf_ct_tcp_timeout_syn_recv __read_mostly = 60 SECS;
static unsigned int nf_ct_tcp_timeout_established __read_mostly = 5 DAYS;
static unsigned int nf_ct_tcp_timeout_fin_wait __read_mostly = 2 MINS;
static unsigned int nf_ct_tcp_timeout_close_wait __read_mostly = 60 SECS;
static unsigned int nf_ct_tcp_timeout_last_ack __read_mostly = 30 SECS;
static unsigned int nf_ct_tcp_timeout_time_wait __read_mostly = 2 MINS;
static unsigned int nf_ct_tcp_timeout_close __read_mostly = 10 SECS;
/* RFC1122 says the R2 limit should be at least 100 seconds.
Linux uses 15 packets as limit, which corresponds
to ~13-30min depending on RTO. */
static unsigned int nf_ct_tcp_timeout_max_retrans __read_mostly = 5 MINS;
static unsigned int * tcp_timeouts[] = {
NULL, /* TCP_CONNTRACK_NONE */
&nf_ct_tcp_timeout_syn_sent, /* TCP_CONNTRACK_SYN_SENT, */
&nf_ct_tcp_timeout_syn_recv, /* TCP_CONNTRACK_SYN_RECV, */
&nf_ct_tcp_timeout_established, /* TCP_CONNTRACK_ESTABLISHED, */
&nf_ct_tcp_timeout_fin_wait, /* TCP_CONNTRACK_FIN_WAIT, */
&nf_ct_tcp_timeout_close_wait, /* TCP_CONNTRACK_CLOSE_WAIT, */
&nf_ct_tcp_timeout_last_ack, /* TCP_CONNTRACK_LAST_ACK, */
&nf_ct_tcp_timeout_time_wait, /* TCP_CONNTRACK_TIME_WAIT, */
&nf_ct_tcp_timeout_close, /* TCP_CONNTRACK_CLOSE, */
NULL, /* TCP_CONNTRACK_LISTEN */
};
static unsigned int tcp_timeouts[TCP_CONNTRACK_MAX] __read_mostly = {
[TCP_CONNTRACK_SYN_SENT] = 2 MINS,
[TCP_CONNTRACK_SYN_RECV] = 60 SECS,
[TCP_CONNTRACK_ESTABLISHED] = 5 DAYS,
[TCP_CONNTRACK_FIN_WAIT] = 2 MINS,
[TCP_CONNTRACK_CLOSE_WAIT] = 60 SECS,
[TCP_CONNTRACK_LAST_ACK] = 30 SECS,
[TCP_CONNTRACK_TIME_WAIT] = 2 MINS,
[TCP_CONNTRACK_CLOSE] = 10 SECS,
};
#define sNO TCP_CONNTRACK_NONE
#define sSS TCP_CONNTRACK_SYN_SENT
@ -941,8 +930,8 @@ static int tcp_packet(struct nf_conn *conntrack,
|| new_state == TCP_CONNTRACK_CLOSE))
conntrack->proto.tcp.seen[dir].flags |= IP_CT_TCP_FLAG_CLOSE_INIT;
timeout = conntrack->proto.tcp.retrans >= nf_ct_tcp_max_retrans
&& *tcp_timeouts[new_state] > nf_ct_tcp_timeout_max_retrans
? nf_ct_tcp_timeout_max_retrans : *tcp_timeouts[new_state];
&& tcp_timeouts[new_state] > nf_ct_tcp_timeout_max_retrans
? nf_ct_tcp_timeout_max_retrans : tcp_timeouts[new_state];
write_unlock_bh(&tcp_lock);
nf_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, skb);
@ -1163,56 +1152,56 @@ static struct ctl_table_header *tcp_sysctl_header;
static struct ctl_table tcp_sysctl_table[] = {
{
.procname = "nf_conntrack_tcp_timeout_syn_sent",
.data = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_tcp_timeout_close,
.data = &tcp_timeouts[TCP_CONNTRACK_CLOSE],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@ -1257,56 +1246,56 @@ static struct ctl_table tcp_sysctl_table[] = {
static struct ctl_table tcp_compat_sysctl_table[] = {
{
.procname = "ip_conntrack_tcp_timeout_syn_sent",
.data = &nf_ct_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_recv",
.data = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_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 = &nf_ct_tcp_timeout_close,
.data = &tcp_timeouts[TCP_CONNTRACK_CLOSE],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,