[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv4 / sysctl_net_ipv4.c

/*
 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
 *
 * $Id: sysctl_net_ipv4.c,v 1.50 2001/10/20 00:00:11 davem Exp $
 *
 * Begun April 1, 1996, Mike Shaver.
 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
 */

#include <linux/mm.h>
#include <linux/module.h>
#include <linux/sysctl.h>
#include <linux/igmp.h>
#include <linux/inetdevice.h>
#include <net/snmp.h>
#include <net/icmp.h>
#include <net/ip.h>
#include <net/route.h>
#include <net/tcp.h>
#include <net/cipso_ipv4.h>

/* From af_inet.c */
extern int sysctl_ip_nonlocal_bind;

#ifdef CONFIG_SYSCTL
static int zero;
static int tcp_retr1_max = 255; 
static int ip_local_port_range_min[] = { 1, 1 };
static int ip_local_port_range_max[] = { 65535, 65535 };
#endif

struct ipv4_config ipv4_config;

#ifdef CONFIG_SYSCTL

static
int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
			void __user *buffer, size_t *lenp, loff_t *ppos)
{
	int val = ipv4_devconf.forwarding;
	int ret;

	ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);

	if (write && ipv4_devconf.forwarding != val)
		inet_forward_change();

	return ret;
}

static int ipv4_sysctl_forward_strategy(ctl_table *table,
			 int __user *name, int nlen,
			 void __user *oldval, size_t __user *oldlenp,
			 void __user *newval, size_t newlen, 
			 void **context)
{
	int *valp = table->data;
	int new;

	if (!newval || !newlen)
		return 0;

	if (newlen != sizeof(int))
		return -EINVAL;

	if (get_user(new, (int __user *)newval))
		return -EFAULT;

	if (new == *valp)
		return 0;

	if (oldval && oldlenp) {
		size_t len;

		if (get_user(len, oldlenp))
			return -EFAULT;

		if (len) {
			if (len > table->maxlen)
				len = table->maxlen;
			if (copy_to_user(oldval, valp, len))
				return -EFAULT;
			if (put_user(len, oldlenp))
				return -EFAULT;
		}
	}

	*valp = new;
	inet_forward_change();
	return 1;
}

static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file * filp,
				       void __user *buffer, size_t *lenp, loff_t *ppos)
{
	char val[TCP_CA_NAME_MAX];
	ctl_table tbl = {
		.data = val,
		.maxlen = TCP_CA_NAME_MAX,
	};
	int ret;

	tcp_get_default_congestion_control(val);

	ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
	if (write && ret == 0)
		ret = tcp_set_default_congestion_control(val);
	return ret;
}

static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
					 int nlen, void __user *oldval,
					 size_t __user *oldlenp,
					 void __user *newval, size_t newlen,
					 void **context)
{
	char val[TCP_CA_NAME_MAX];
	ctl_table tbl = {
		.data = val,
		.maxlen = TCP_CA_NAME_MAX,
	};
	int ret;

	tcp_get_default_congestion_control(val);
	ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen,
			    context);
	if (ret == 0 && newval && newlen)
		ret = tcp_set_default_congestion_control(val);
	return ret;
}

ctl_table ipv4_table[] = {
        {
		.ctl_name	= NET_IPV4_TCP_TIMESTAMPS,
		.procname	= "tcp_timestamps",
		.data		= &sysctl_tcp_timestamps,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
        {
		.ctl_name	= NET_IPV4_TCP_WINDOW_SCALING,
		.procname	= "tcp_window_scaling",
		.data		= &sysctl_tcp_window_scaling,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
        {
		.ctl_name	= NET_IPV4_TCP_SACK,
		.procname	= "tcp_sack",
		.data		= &sysctl_tcp_sack,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
        {
		.ctl_name	= NET_IPV4_TCP_RETRANS_COLLAPSE,
		.procname	= "tcp_retrans_collapse",
		.data		= &sysctl_tcp_retrans_collapse,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
        {
		.ctl_name	= NET_IPV4_FORWARD,
		.procname	= "ip_forward",
		.data		= &ipv4_devconf.forwarding,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &ipv4_sysctl_forward,
		.strategy	= &ipv4_sysctl_forward_strategy
	},
        {
		.ctl_name	= NET_IPV4_DEFAULT_TTL,
		.procname	= "ip_default_ttl",
 		.data		= &sysctl_ip_default_ttl,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &ipv4_doint_and_flush,
		.strategy	= &ipv4_doint_and_flush_strategy,
	},
        {
		.ctl_name	= NET_IPV4_NO_PMTU_DISC,
		.procname	= "ip_no_pmtu_disc",
		.data		= &ipv4_config.no_pmtu_disc,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_NONLOCAL_BIND,
		.procname	= "ip_nonlocal_bind",
		.data		= &sysctl_ip_nonlocal_bind,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_TCP_SYN_RETRIES,
		.procname	= "tcp_syn_retries",
		.data		= &sysctl_tcp_syn_retries,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_SYNACK_RETRIES,
		.procname	= "tcp_synack_retries",
		.data		= &sysctl_tcp_synack_retries,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_MAX_ORPHANS,
		.procname	= "tcp_max_orphans",
		.data		= &sysctl_tcp_max_orphans,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_MAX_TW_BUCKETS,
		.procname	= "tcp_max_tw_buckets",
		.data		= &tcp_death_row.sysctl_max_tw_buckets,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_IPFRAG_HIGH_THRESH,
		.procname	= "ipfrag_high_thresh",
		.data		= &sysctl_ipfrag_high_thresh,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_IPFRAG_LOW_THRESH,
		.procname	= "ipfrag_low_thresh",
		.data		= &sysctl_ipfrag_low_thresh,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_DYNADDR,
		.procname	= "ip_dynaddr",
		.data		= &sysctl_ip_dynaddr,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_IPFRAG_TIME,
		.procname	= "ipfrag_time",
		.data		= &sysctl_ipfrag_time,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
	{
		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_TIME,
		.procname	= "tcp_keepalive_time",
		.data		= &sysctl_tcp_keepalive_time,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
	{
		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_PROBES,
		.procname	= "tcp_keepalive_probes",
		.data		= &sysctl_tcp_keepalive_probes,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_INTVL,
		.procname	= "tcp_keepalive_intvl",
		.data		= &sysctl_tcp_keepalive_intvl,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
	{
		.ctl_name	= NET_IPV4_TCP_RETRIES1,
		.procname	= "tcp_retries1",
		.data		= &sysctl_tcp_retries1,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra2		= &tcp_retr1_max
	},
	{
		.ctl_name	= NET_IPV4_TCP_RETRIES2,
		.procname	= "tcp_retries2",
		.data		= &sysctl_tcp_retries2,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_TCP_FIN_TIMEOUT,
		.procname	= "tcp_fin_timeout",
		.data		= &sysctl_tcp_fin_timeout,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
#ifdef CONFIG_SYN_COOKIES
	{
		.ctl_name	= NET_TCP_SYNCOOKIES,
		.procname	= "tcp_syncookies",
		.data		= &sysctl_tcp_syncookies,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
#endif
	{
		.ctl_name	= NET_TCP_TW_RECYCLE,
		.procname	= "tcp_tw_recycle",
		.data		= &tcp_death_row.sysctl_tw_recycle,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_ABORT_ON_OVERFLOW,
		.procname	= "tcp_abort_on_overflow",
		.data		= &sysctl_tcp_abort_on_overflow,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_STDURG,
		.procname	= "tcp_stdurg",
		.data		= &sysctl_tcp_stdurg,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_RFC1337,
		.procname	= "tcp_rfc1337",
		.data		= &sysctl_tcp_rfc1337,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_MAX_SYN_BACKLOG,
		.procname	= "tcp_max_syn_backlog",
		.data		= &sysctl_max_syn_backlog,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_LOCAL_PORT_RANGE,
		.procname	= "ip_local_port_range",
		.data		= &sysctl_local_port_range,
		.maxlen		= sizeof(sysctl_local_port_range),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= ip_local_port_range_min,
		.extra2		= ip_local_port_range_max
	},
	{
		.ctl_name	= NET_IPV4_ICMP_ECHO_IGNORE_ALL,
		.procname	= "icmp_echo_ignore_all",
		.data		= &sysctl_icmp_echo_ignore_all,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
		.procname	= "icmp_echo_ignore_broadcasts",
		.data		= &sysctl_icmp_echo_ignore_broadcasts,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
		.procname	= "icmp_ignore_bogus_error_responses",
		.data		= &sysctl_icmp_ignore_bogus_error_responses,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
		.procname	= "icmp_errors_use_inbound_ifaddr",
		.data		= &sysctl_icmp_errors_use_inbound_ifaddr,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_ROUTE,
		.procname	= "route",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= ipv4_route_table
	},
#ifdef CONFIG_IP_MULTICAST
	{
		.ctl_name	= NET_IPV4_IGMP_MAX_MEMBERSHIPS,
		.procname	= "igmp_max_memberships",
		.data		= &sysctl_igmp_max_memberships,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},

#endif
	{
		.ctl_name	= NET_IPV4_IGMP_MAX_MSF,
		.procname	= "igmp_max_msf",
		.data		= &sysctl_igmp_max_msf,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_INET_PEER_THRESHOLD,
		.procname	= "inet_peer_threshold",
		.data		= &inet_peer_threshold,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_INET_PEER_MINTTL,
		.procname	= "inet_peer_minttl",
		.data		= &inet_peer_minttl,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
	{
		.ctl_name	= NET_IPV4_INET_PEER_MAXTTL,
		.procname	= "inet_peer_maxttl",
		.data		= &inet_peer_maxttl,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
	{
		.ctl_name	= NET_IPV4_INET_PEER_GC_MINTIME,
		.procname	= "inet_peer_gc_mintime",
		.data		= &inet_peer_gc_mintime,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
	{
		.ctl_name	= NET_IPV4_INET_PEER_GC_MAXTIME,
		.procname	= "inet_peer_gc_maxtime",
		.data		= &inet_peer_gc_maxtime,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
	{
		.ctl_name	= NET_TCP_ORPHAN_RETRIES,
		.procname	= "tcp_orphan_retries",
		.data		= &sysctl_tcp_orphan_retries,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_FACK,
		.procname	= "tcp_fack",
		.data		= &sysctl_tcp_fack,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_REORDERING,
		.procname	= "tcp_reordering",
		.data		= &sysctl_tcp_reordering,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_ECN,
		.procname	= "tcp_ecn",
		.data		= &sysctl_tcp_ecn,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_DSACK,
		.procname	= "tcp_dsack",
		.data		= &sysctl_tcp_dsack,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_MEM,
		.procname	= "tcp_mem",
		.data		= &sysctl_tcp_mem,
		.maxlen		= sizeof(sysctl_tcp_mem),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_WMEM,
		.procname	= "tcp_wmem",
		.data		= &sysctl_tcp_wmem,
		.maxlen		= sizeof(sysctl_tcp_wmem),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_RMEM,
		.procname	= "tcp_rmem",
		.data		= &sysctl_tcp_rmem,
		.maxlen		= sizeof(sysctl_tcp_rmem),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_APP_WIN,
		.procname	= "tcp_app_win",
		.data		= &sysctl_tcp_app_win,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_ADV_WIN_SCALE,
		.procname	= "tcp_adv_win_scale",
		.data		= &sysctl_tcp_adv_win_scale,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_ICMP_RATELIMIT,
		.procname	= "icmp_ratelimit",
		.data		= &sysctl_icmp_ratelimit,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_ICMP_RATEMASK,
		.procname	= "icmp_ratemask",
		.data		= &sysctl_icmp_ratemask,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_TW_REUSE,
		.procname	= "tcp_tw_reuse",
		.data		= &sysctl_tcp_tw_reuse,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_FRTO,
		.procname	= "tcp_frto",
		.data		= &sysctl_tcp_frto,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_TCP_LOW_LATENCY,
		.procname	= "tcp_low_latency",
		.data		= &sysctl_tcp_low_latency,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV4_IPFRAG_SECRET_INTERVAL,
		.procname	= "ipfrag_secret_interval",
		.data		= &sysctl_ipfrag_secret_interval,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies
	},
	{
		.ctl_name	= NET_IPV4_IPFRAG_MAX_DIST,
		.procname	= "ipfrag_max_dist",
		.data		= &sysctl_ipfrag_max_dist,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.extra1		= &zero
	},
	{
		.ctl_name	= NET_TCP_NO_METRICS_SAVE,
		.procname	= "tcp_no_metrics_save",
		.data		= &sysctl_tcp_nometrics_save,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_TCP_MODERATE_RCVBUF,
		.procname	= "tcp_moderate_rcvbuf",
		.data		= &sysctl_tcp_moderate_rcvbuf,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_TCP_TSO_WIN_DIVISOR,
		.procname	= "tcp_tso_win_divisor",
		.data		= &sysctl_tcp_tso_win_divisor,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_TCP_CONG_CONTROL,
		.procname	= "tcp_congestion_control",
		.mode		= 0644,
		.maxlen		= TCP_CA_NAME_MAX,
		.proc_handler	= &proc_tcp_congestion_control,
		.strategy	= &sysctl_tcp_congestion_control,
	},
	{
		.ctl_name	= NET_TCP_ABC,
		.procname	= "tcp_abc",
		.data		= &sysctl_tcp_abc,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_TCP_MTU_PROBING,
		.procname	= "tcp_mtu_probing",
		.data		= &sysctl_tcp_mtu_probing,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_TCP_BASE_MSS,
		.procname	= "tcp_base_mss",
		.data		= &sysctl_tcp_base_mss,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
        {
		.ctl_name	= NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
		.procname	= "tcp_workaround_signed_windows",
		.data		= &sysctl_tcp_workaround_signed_windows,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
#ifdef CONFIG_NET_DMA
	{
		.ctl_name	= NET_TCP_DMA_COPYBREAK,
		.procname	= "tcp_dma_copybreak",
		.data		= &sysctl_tcp_dma_copybreak,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
#endif
	{
		.ctl_name	= NET_TCP_SLOW_START_AFTER_IDLE,
		.procname	= "tcp_slow_start_after_idle",
		.data		= &sysctl_tcp_slow_start_after_idle,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
#ifdef CONFIG_NETLABEL
	{
		.ctl_name	= NET_CIPSOV4_CACHE_ENABLE,
		.procname	= "cipso_cache_enable",
		.data		= &cipso_v4_cache_enabled,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_CIPSOV4_CACHE_BUCKET_SIZE,
		.procname	= "cipso_cache_bucket_size",
		.data		= &cipso_v4_cache_bucketsize,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_CIPSOV4_RBM_OPTFMT,
		.procname	= "cipso_rbm_optfmt",
		.data		= &cipso_v4_rbm_optfmt,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_CIPSOV4_RBM_STRICTVALID,
		.procname	= "cipso_rbm_strictvalid",
		.data		= &cipso_v4_rbm_strictvalid,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif /* CONFIG_NETLABEL */
	{ .ctl_name = 0 }
};

#endif /* CONFIG_SYSCTL */

EXPORT_SYMBOL(ipv4_config);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
	3	*
	4	* $Id: sysctl_net_ipv4.c,v 1.50 2001/10/20 00:00:11 davem Exp $
	5	*
	6	* Begun April 1, 1996, Mike Shaver.
	7	* Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
	8	*/
	9
	10	#include <linux/mm.h>
	11	#include <linux/module.h>
	12	#include <linux/sysctl.h>
20380731	13	#include <linux/igmp.h>
14c85021	14	#include <linux/inetdevice.h>
1da177e4	15	#include <net/snmp.h>
20380731	16	#include <net/icmp.h>
1da177e4 LT	17	#include <net/ip.h>
	18	#include <net/route.h>
	19	#include <net/tcp.h>
446fda4f	20	#include <net/cipso_ipv4.h>
1da177e4 LT	21
	22	/* From af_inet.c */
	23	extern int sysctl_ip_nonlocal_bind;
	24
1da177e4	25	#ifdef CONFIG_SYSCTL
89cee8b1	26	static int zero;
1da177e4 LT	27	static int tcp_retr1_max = 255;
	28	static int ip_local_port_range_min[] = { 1, 1 };
	29	static int ip_local_port_range_max[] = { 65535, 65535 };
	30	#endif
	31
	32	struct ipv4_config ipv4_config;
	33
1da177e4 LT	34	#ifdef CONFIG_SYSCTL
	35
	36	static
	37	int ipv4_sysctl_forward(ctl_table ctl, int write, struct file filp,
	38	void __user buffer, size_t lenp, loff_t *ppos)
	39	{
	40	int val = ipv4_devconf.forwarding;
	41	int ret;
	42
	43	ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
	44
	45	if (write && ipv4_devconf.forwarding != val)
	46	inet_forward_change();
	47
	48	return ret;
	49	}
	50
	51	static int ipv4_sysctl_forward_strategy(ctl_table *table,
	52	int __user *name, int nlen,
	53	void __user oldval, size_t __user oldlenp,
	54	void __user *newval, size_t newlen,
	55	void **context)
	56	{
	57	int *valp = table->data;
	58	int new;
	59
	60	if (!newval \|\| !newlen)
	61	return 0;
	62
	63	if (newlen != sizeof(int))
	64	return -EINVAL;
	65
	66	if (get_user(new, (int __user *)newval))
	67	return -EFAULT;
	68
	69	if (new == *valp)
	70	return 0;
	71
	72	if (oldval && oldlenp) {
	73	size_t len;
	74
	75	if (get_user(len, oldlenp))
	76	return -EFAULT;
	77
	78	if (len) {
	79	if (len > table->maxlen)
	80	len = table->maxlen;
	81	if (copy_to_user(oldval, valp, len))
	82	return -EFAULT;
	83	if (put_user(len, oldlenp))
	84	return -EFAULT;
	85	}
	86	}
	87
	88	*valp = new;
	89	inet_forward_change();
	90	return 1;
	91	}
	92
317a76f9 SH	93	static int proc_tcp_congestion_control(ctl_table ctl, int write, struct file filp,
	94	void __user buffer, size_t lenp, loff_t *ppos)
	95	{
	96	char val[TCP_CA_NAME_MAX];
	97	ctl_table tbl = {
	98	.data = val,
	99	.maxlen = TCP_CA_NAME_MAX,
	100	};
	101	int ret;
	102
	103	tcp_get_default_congestion_control(val);
	104
	105	ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
	106	if (write && ret == 0)
	107	ret = tcp_set_default_congestion_control(val);
	108	return ret;
	109	}
	110
20380731 ACM	111	static int sysctl_tcp_congestion_control(ctl_table table, int __user name,
	112	int nlen, void __user *oldval,
	113	size_t __user *oldlenp,
	114	void __user *newval, size_t newlen,
	115	void **context)
317a76f9 SH	116	{
	117	char val[TCP_CA_NAME_MAX];
	118	ctl_table tbl = {
	119	.data = val,
	120	.maxlen = TCP_CA_NAME_MAX,
	121	};
	122	int ret;
	123
	124	tcp_get_default_congestion_control(val);
	125	ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen,
	126	context);
	127	if (ret == 0 && newval && newlen)
	128	ret = tcp_set_default_congestion_control(val);
	129	return ret;
	130	}
	131
1da177e4 LT	132	ctl_table ipv4_table[] = {
	133	{
	134	.ctl_name = NET_IPV4_TCP_TIMESTAMPS,
	135	.procname = "tcp_timestamps",
	136	.data = &sysctl_tcp_timestamps,
	137	.maxlen = sizeof(int),
	138	.mode = 0644,
	139	.proc_handler = &proc_dointvec
	140	},
	141	{
	142	.ctl_name = NET_IPV4_TCP_WINDOW_SCALING,
	143	.procname = "tcp_window_scaling",
	144	.data = &sysctl_tcp_window_scaling,
	145	.maxlen = sizeof(int),
	146	.mode = 0644,
	147	.proc_handler = &proc_dointvec
	148	},
	149	{
	150	.ctl_name = NET_IPV4_TCP_SACK,
	151	.procname = "tcp_sack",
	152	.data = &sysctl_tcp_sack,
	153	.maxlen = sizeof(int),
	154	.mode = 0644,
	155	.proc_handler = &proc_dointvec
	156	},
	157	{
	158	.ctl_name = NET_IPV4_TCP_RETRANS_COLLAPSE,
	159	.procname = "tcp_retrans_collapse",
	160	.data = &sysctl_tcp_retrans_collapse,
	161	.maxlen = sizeof(int),
	162	.mode = 0644,
	163	.proc_handler = &proc_dointvec
	164	},
	165	{
	166	.ctl_name = NET_IPV4_FORWARD,
	167	.procname = "ip_forward",
	168	.data = &ipv4_devconf.forwarding,
	169	.maxlen = sizeof(int),
	170	.mode = 0644,
	171	.proc_handler = &ipv4_sysctl_forward,
	172	.strategy = &ipv4_sysctl_forward_strategy
	173	},
	174	{
	175	.ctl_name = NET_IPV4_DEFAULT_TTL,
	176	.procname = "ip_default_ttl",
	177	.data = &sysctl_ip_default_ttl,
	178	.maxlen = sizeof(int),
	179	.mode = 0644,
	180	.proc_handler = &ipv4_doint_and_flush,
	181	.strategy = &ipv4_doint_and_flush_strategy,
	182	},
1da177e4 LT	183	{
	184	.ctl_name = NET_IPV4_NO_PMTU_DISC,
	185	.procname = "ip_no_pmtu_disc",
	186	.data = &ipv4_config.no_pmtu_disc,
	187	.maxlen = sizeof(int),
	188	.mode = 0644,
	189	.proc_handler = &proc_dointvec
	190	},
	191	{
	192	.ctl_name = NET_IPV4_NONLOCAL_BIND,
	193	.procname = "ip_nonlocal_bind",
	194	.data = &sysctl_ip_nonlocal_bind,
	195	.maxlen = sizeof(int),
	196	.mode = 0644,
	197	.proc_handler = &proc_dointvec
	198	},
	199	{
	200	.ctl_name = NET_IPV4_TCP_SYN_RETRIES,
	201	.procname = "tcp_syn_retries",
	202	.data = &sysctl_tcp_syn_retries,
	203	.maxlen = sizeof(int),
	204	.mode = 0644,
	205	.proc_handler = &proc_dointvec
	206	},
	207	{
	208	.ctl_name = NET_TCP_SYNACK_RETRIES,
	209	.procname = "tcp_synack_retries",
	210	.data = &sysctl_tcp_synack_retries,
	211	.maxlen = sizeof(int),
	212	.mode = 0644,
	213	.proc_handler = &proc_dointvec
	214	},
	215	{
	216	.ctl_name = NET_TCP_MAX_ORPHANS,
	217	.procname = "tcp_max_orphans",
	218	.data = &sysctl_tcp_max_orphans,
	219	.maxlen = sizeof(int),
	220	.mode = 0644,
	221	.proc_handler = &proc_dointvec
	222	},
	223	{
	224	.ctl_name = NET_TCP_MAX_TW_BUCKETS,
	225	.procname = "tcp_max_tw_buckets",
295ff7ed	226	.data = &tcp_death_row.sysctl_max_tw_buckets,
1da177e4 LT	227	.maxlen = sizeof(int),
	228	.mode = 0644,
	229	.proc_handler = &proc_dointvec
	230	},
	231	{
	232	.ctl_name = NET_IPV4_IPFRAG_HIGH_THRESH,
	233	.procname = "ipfrag_high_thresh",
	234	.data = &sysctl_ipfrag_high_thresh,
	235	.maxlen = sizeof(int),
	236	.mode = 0644,
	237	.proc_handler = &proc_dointvec
	238	},
	239	{
	240	.ctl_name = NET_IPV4_IPFRAG_LOW_THRESH,
	241	.procname = "ipfrag_low_thresh",
	242	.data = &sysctl_ipfrag_low_thresh,
	243	.maxlen = sizeof(int),
	244	.mode = 0644,
	245	.proc_handler = &proc_dointvec
	246	},
	247	{
	248	.ctl_name = NET_IPV4_DYNADDR,
	249	.procname = "ip_dynaddr",
	250	.data = &sysctl_ip_dynaddr,
	251	.maxlen = sizeof(int),
	252	.mode = 0644,
	253	.proc_handler = &proc_dointvec
	254	},
	255	{
	256	.ctl_name = NET_IPV4_IPFRAG_TIME,
	257	.procname = "ipfrag_time",
	258	.data = &sysctl_ipfrag_time,
	259	.maxlen = sizeof(int),
	260	.mode = 0644,
	261	.proc_handler = &proc_dointvec_jiffies,
	262	.strategy = &sysctl_jiffies
	263	},
	264	{
	265	.ctl_name = NET_IPV4_TCP_KEEPALIVE_TIME,
	266	.procname = "tcp_keepalive_time",
	267	.data = &sysctl_tcp_keepalive_time,
	268	.maxlen = sizeof(int),
	269	.mode = 0644,
	270	.proc_handler = &proc_dointvec_jiffies,
	271	.strategy = &sysctl_jiffies
	272	},
	273	{
	274	.ctl_name = NET_IPV4_TCP_KEEPALIVE_PROBES,
	275	.procname = "tcp_keepalive_probes",
	276	.data = &sysctl_tcp_keepalive_probes,
	277	.maxlen = sizeof(int),
	278	.mode = 0644,
	279	.proc_handler = &proc_dointvec
	280	},
	281	{
	282	.ctl_name = NET_IPV4_TCP_KEEPALIVE_INTVL,
	283	.procname = "tcp_keepalive_intvl",
	284	.data = &sysctl_tcp_keepalive_intvl,
	285	.maxlen = sizeof(int),
	286	.mode = 0644,
	287	.proc_handler = &proc_dointvec_jiffies,
	288	.strategy = &sysctl_jiffies
	289	},
	290	{
291	.ctl_name = NET_IPV4_TCP_RETRIES1,
292	.procname = "tcp_retries1",
293	.data = &sysctl_tcp_retries1,
294	.maxlen = sizeof(int),
295	.mode = 0644,
296	.proc_handler = &proc_dointvec_minmax,
297	.strategy = &sysctl_intvec,
298	.extra2 = &tcp_retr1_max
299	},
300	{
301	.ctl_name = NET_IPV4_TCP_RETRIES2,
302	.procname = "tcp_retries2",
303	.data = &sysctl_tcp_retries2,
304	.maxlen = sizeof(int),
305	.mode = 0644,
306	.proc_handler = &proc_dointvec
307	},
308	{
309	.ctl_name = NET_IPV4_TCP_FIN_TIMEOUT,
310	.procname = "tcp_fin_timeout",
311	.data = &sysctl_tcp_fin_timeout,
312	.maxlen = sizeof(int),
313	.mode = 0644,
314	.proc_handler = &proc_dointvec_jiffies,
315	.strategy = &sysctl_jiffies
316	},
317	#ifdef CONFIG_SYN_COOKIES
318	{
319	.ctl_name = NET_TCP_SYNCOOKIES,
320	.procname = "tcp_syncookies",
321	.data = &sysctl_tcp_syncookies,
322	.maxlen = sizeof(int),
323	.mode = 0644,
324	.proc_handler = &proc_dointvec
325	},
326	#endif
327	{
328	.ctl_name = NET_TCP_TW_RECYCLE,
329	.procname = "tcp_tw_recycle",
295ff7ed	330	.data = &tcp_death_row.sysctl_tw_recycle,
1da177e4 LT	331	.maxlen = sizeof(int),
	332	.mode = 0644,
	333	.proc_handler = &proc_dointvec
	334	},
	335	{
	336	.ctl_name = NET_TCP_ABORT_ON_OVERFLOW,
	337	.procname = "tcp_abort_on_overflow",
	338	.data = &sysctl_tcp_abort_on_overflow,
	339	.maxlen = sizeof(int),
	340	.mode = 0644,
	341	.proc_handler = &proc_dointvec
	342	},
	343	{
	344	.ctl_name = NET_TCP_STDURG,
	345	.procname = "tcp_stdurg",
	346	.data = &sysctl_tcp_stdurg,
	347	.maxlen = sizeof(int),
	348	.mode = 0644,
	349	.proc_handler = &proc_dointvec
	350	},
	351	{
	352	.ctl_name = NET_TCP_RFC1337,
	353	.procname = "tcp_rfc1337",
	354	.data = &sysctl_tcp_rfc1337,
	355	.maxlen = sizeof(int),
	356	.mode = 0644,
	357	.proc_handler = &proc_dointvec
	358	},
	359	{
	360	.ctl_name = NET_TCP_MAX_SYN_BACKLOG,
	361	.procname = "tcp_max_syn_backlog",
	362	.data = &sysctl_max_syn_backlog,
	363	.maxlen = sizeof(int),
	364	.mode = 0644,
	365	.proc_handler = &proc_dointvec
	366	},
	367	{
	368	.ctl_name = NET_IPV4_LOCAL_PORT_RANGE,
	369	.procname = "ip_local_port_range",
	370	.data = &sysctl_local_port_range,
	371	.maxlen = sizeof(sysctl_local_port_range),
	372	.mode = 0644,
	373	.proc_handler = &proc_dointvec_minmax,
	374	.strategy = &sysctl_intvec,
	375	.extra1 = ip_local_port_range_min,
	376	.extra2 = ip_local_port_range_max
	377	},
	378	{
	379	.ctl_name = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
	380	.procname = "icmp_echo_ignore_all",
	381	.data = &sysctl_icmp_echo_ignore_all,
	382	.maxlen = sizeof(int),
	383	.mode = 0644,
	384	.proc_handler = &proc_dointvec
	385	},
	386	{
	387	.ctl_name = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
	388	.procname = "icmp_echo_ignore_broadcasts",
	389	.data = &sysctl_icmp_echo_ignore_broadcasts,
	390	.maxlen = sizeof(int),
	391	.mode = 0644,
	392	.proc_handler = &proc_dointvec
	393	},
	394	{
395	.ctl_name = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
396	.procname = "icmp_ignore_bogus_error_responses",
397	.data = &sysctl_icmp_ignore_bogus_error_responses,
398	.maxlen = sizeof(int),
399	.mode = 0644,
400	.proc_handler = &proc_dointvec
401	},
1c2fb7f9 S	402	{
	403	.ctl_name = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
	404	.procname = "icmp_errors_use_inbound_ifaddr",
	405	.data = &sysctl_icmp_errors_use_inbound_ifaddr,
	406	.maxlen = sizeof(int),
	407	.mode = 0644,
	408	.proc_handler = &proc_dointvec
	409	},
1da177e4 LT	410	{
	411	.ctl_name = NET_IPV4_ROUTE,
	412	.procname = "route",
	413	.maxlen = 0,
	414	.mode = 0555,
	415	.child = ipv4_route_table
	416	},
	417	#ifdef CONFIG_IP_MULTICAST
	418	{
	419	.ctl_name = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
	420	.procname = "igmp_max_memberships",
	421	.data = &sysctl_igmp_max_memberships,
	422	.maxlen = sizeof(int),
	423	.mode = 0644,
	424	.proc_handler = &proc_dointvec
	425	},
	426
	427	#endif
	428	{
	429	.ctl_name = NET_IPV4_IGMP_MAX_MSF,
	430	.procname = "igmp_max_msf",
	431	.data = &sysctl_igmp_max_msf,
	432	.maxlen = sizeof(int),
	433	.mode = 0644,
	434	.proc_handler = &proc_dointvec
	435	},
	436	{
	437	.ctl_name = NET_IPV4_INET_PEER_THRESHOLD,
	438	.procname = "inet_peer_threshold",
	439	.data = &inet_peer_threshold,
	440	.maxlen = sizeof(int),
	441	.mode = 0644,
	442	.proc_handler = &proc_dointvec
	443	},
	444	{
	445	.ctl_name = NET_IPV4_INET_PEER_MINTTL,
	446	.procname = "inet_peer_minttl",
	447	.data = &inet_peer_minttl,
	448	.maxlen = sizeof(int),
	449	.mode = 0644,
	450	.proc_handler = &proc_dointvec_jiffies,
	451	.strategy = &sysctl_jiffies
	452	},
	453	{
	454	.ctl_name = NET_IPV4_INET_PEER_MAXTTL,
	455	.procname = "inet_peer_maxttl",
	456	.data = &inet_peer_maxttl,
	457	.maxlen = sizeof(int),
	458	.mode = 0644,
	459	.proc_handler = &proc_dointvec_jiffies,
	460	.strategy = &sysctl_jiffies
	461	},
	462	{
	463	.ctl_name = NET_IPV4_INET_PEER_GC_MINTIME,
	464	.procname = "inet_peer_gc_mintime",
	465	.data = &inet_peer_gc_mintime,
	466	.maxlen = sizeof(int),
	467	.mode = 0644,
	468	.proc_handler = &proc_dointvec_jiffies,
	469	.strategy = &sysctl_jiffies
	470	},
	471	{
	472	.ctl_name = NET_IPV4_INET_PEER_GC_MAXTIME,
	473	.procname = "inet_peer_gc_maxtime",
474	.data = &inet_peer_gc_maxtime,
475	.maxlen = sizeof(int),
476	.mode = 0644,
477	.proc_handler = &proc_dointvec_jiffies,
478	.strategy = &sysctl_jiffies
479	},
480	{
481	.ctl_name = NET_TCP_ORPHAN_RETRIES,
482	.procname = "tcp_orphan_retries",
483	.data = &sysctl_tcp_orphan_retries,
484	.maxlen = sizeof(int),
485	.mode = 0644,
486	.proc_handler = &proc_dointvec
487	},
488	{
489	.ctl_name = NET_TCP_FACK,
490	.procname = "tcp_fack",
491	.data = &sysctl_tcp_fack,
492	.maxlen = sizeof(int),
493	.mode = 0644,
494	.proc_handler = &proc_dointvec
495	},
496	{
497	.ctl_name = NET_TCP_REORDERING,
498	.procname = "tcp_reordering",
499	.data = &sysctl_tcp_reordering,
500	.maxlen = sizeof(int),
501	.mode = 0644,
502	.proc_handler = &proc_dointvec
503	},
504	{
505	.ctl_name = NET_TCP_ECN,
506	.procname = "tcp_ecn",
507	.data = &sysctl_tcp_ecn,
508	.maxlen = sizeof(int),
509	.mode = 0644,
510	.proc_handler = &proc_dointvec
511	},
512	{
513	.ctl_name = NET_TCP_DSACK,
514	.procname = "tcp_dsack",
515	.data = &sysctl_tcp_dsack,
516	.maxlen = sizeof(int),
517	.mode = 0644,
518	.proc_handler = &proc_dointvec
519	},
520	{
521	.ctl_name = NET_TCP_MEM,
522	.procname = "tcp_mem",
523	.data = &sysctl_tcp_mem,
524	.maxlen = sizeof(sysctl_tcp_mem),
525	.mode = 0644,
526	.proc_handler = &proc_dointvec
527	},
528	{
529	.ctl_name = NET_TCP_WMEM,
530	.procname = "tcp_wmem",
531	.data = &sysctl_tcp_wmem,
532	.maxlen = sizeof(sysctl_tcp_wmem),
533	.mode = 0644,
534	.proc_handler = &proc_dointvec
535	},
536	{
537	.ctl_name = NET_TCP_RMEM,
538	.procname = "tcp_rmem",
539	.data = &sysctl_tcp_rmem,
540	.maxlen = sizeof(sysctl_tcp_rmem),
541	.mode = 0644,
542	.proc_handler = &proc_dointvec
543	},
544	{
545	.ctl_name = NET_TCP_APP_WIN,
546	.procname = "tcp_app_win",
547	.data = &sysctl_tcp_app_win,
548	.maxlen = sizeof(int),
549	.mode = 0644,
550	.proc_handler = &proc_dointvec
551	},
552	{
553	.ctl_name = NET_TCP_ADV_WIN_SCALE,
554	.procname = "tcp_adv_win_scale",
555	.data = &sysctl_tcp_adv_win_scale,
556	.maxlen = sizeof(int),
557	.mode = 0644,
558	.proc_handler = &proc_dointvec
559	},
560	{
561	.ctl_name = NET_IPV4_ICMP_RATELIMIT,
562	.procname = "icmp_ratelimit",
563	.data = &sysctl_icmp_ratelimit,
564	.maxlen = sizeof(int),
565	.mode = 0644,
566	.proc_handler = &proc_dointvec
567	},
568	{
569	.ctl_name = NET_IPV4_ICMP_RATEMASK,
570	.procname = "icmp_ratemask",
571	.data = &sysctl_icmp_ratemask,
572	.maxlen = sizeof(int),
573	.mode = 0644,
574	.proc_handler = &proc_dointvec
575	},
576	{
577	.ctl_name = NET_TCP_TW_REUSE,
578	.procname = "tcp_tw_reuse",
579	.data = &sysctl_tcp_tw_reuse,
580	.maxlen = sizeof(int),
581	.mode = 0644,
582	.proc_handler = &proc_dointvec
583	},
584	{
585	.ctl_name = NET_TCP_FRTO,
586	.procname = "tcp_frto",
587	.data = &sysctl_tcp_frto,
588	.maxlen = sizeof(int),
589	.mode = 0644,
590	.proc_handler = &proc_dointvec
591	},
592	{
593	.ctl_name = NET_TCP_LOW_LATENCY,
594	.procname = "tcp_low_latency",
595	.data = &sysctl_tcp_low_latency,
596	.maxlen = sizeof(int),
597	.mode = 0644,
598	.proc_handler = &proc_dointvec
599	},
600	{
601	.ctl_name = NET_IPV4_IPFRAG_SECRET_INTERVAL,
602	.procname = "ipfrag_secret_interval",
603	.data = &sysctl_ipfrag_secret_interval,
604	.maxlen = sizeof(int),
605	.mode = 0644,
606	.proc_handler = &proc_dointvec_jiffies,
607	.strategy = &sysctl_jiffies
608	},
89cee8b1 HX	609	{
	610	.ctl_name = NET_IPV4_IPFRAG_MAX_DIST,
	611	.procname = "ipfrag_max_dist",
	612	.data = &sysctl_ipfrag_max_dist,
	613	.maxlen = sizeof(int),
	614	.mode = 0644,
	615	.proc_handler = &proc_dointvec_minmax,
	616	.extra1 = &zero
	617	},
1da177e4 LT	618	{
	619	.ctl_name = NET_TCP_NO_METRICS_SAVE,
	620	.procname = "tcp_no_metrics_save",
	621	.data = &sysctl_tcp_nometrics_save,
	622	.maxlen = sizeof(int),
	623	.mode = 0644,
	624	.proc_handler = &proc_dointvec,
	625	},
1da177e4 LT	626	{
	627	.ctl_name = NET_TCP_MODERATE_RCVBUF,
	628	.procname = "tcp_moderate_rcvbuf",
	629	.data = &sysctl_tcp_moderate_rcvbuf,
	630	.maxlen = sizeof(int),
	631	.mode = 0644,
	632	.proc_handler = &proc_dointvec,
	633	},
	634	{
	635	.ctl_name = NET_TCP_TSO_WIN_DIVISOR,
	636	.procname = "tcp_tso_win_divisor",
	637	.data = &sysctl_tcp_tso_win_divisor,
	638	.maxlen = sizeof(int),
	639	.mode = 0644,
	640	.proc_handler = &proc_dointvec,
	641	},
	642	{
317a76f9 SH	643	.ctl_name = NET_TCP_CONG_CONTROL,
317a76f9 SH	644	.procname = "tcp_congestion_control",
1da177e4	645	.mode = 0644,
317a76f9 SH	646	.maxlen = TCP_CA_NAME_MAX,
	647	.proc_handler = &proc_tcp_congestion_control,
	648	.strategy = &sysctl_tcp_congestion_control,
1da177e4	649	},
9772efb9 SH	650	{
	651	.ctl_name = NET_TCP_ABC,
	652	.procname = "tcp_abc",
	653	.data = &sysctl_tcp_abc,
	654	.maxlen = sizeof(int),
	655	.mode = 0644,
	656	.proc_handler = &proc_dointvec,
	657	},
5d424d5a JH	658	{
	659	.ctl_name = NET_TCP_MTU_PROBING,
	660	.procname = "tcp_mtu_probing",
	661	.data = &sysctl_tcp_mtu_probing,
	662	.maxlen = sizeof(int),
	663	.mode = 0644,
	664	.proc_handler = &proc_dointvec,
	665	},
	666	{
	667	.ctl_name = NET_TCP_BASE_MSS,
	668	.procname = "tcp_base_mss",
	669	.data = &sysctl_tcp_base_mss,
	670	.maxlen = sizeof(int),
	671	.mode = 0644,
	672	.proc_handler = &proc_dointvec,
	673	},
15d99e02 RJ	674	{
	675	.ctl_name = NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
	676	.procname = "tcp_workaround_signed_windows",
	677	.data = &sysctl_tcp_workaround_signed_windows,
	678	.maxlen = sizeof(int),
	679	.mode = 0644,
	680	.proc_handler = &proc_dointvec
	681	},
95937825 CL	682	#ifdef CONFIG_NET_DMA
	683	{
	684	.ctl_name = NET_TCP_DMA_COPYBREAK,
	685	.procname = "tcp_dma_copybreak",
	686	.data = &sysctl_tcp_dma_copybreak,
	687	.maxlen = sizeof(int),
	688	.mode = 0644,
	689	.proc_handler = &proc_dointvec
	690	},
	691	#endif
35089bb2 DM	692	{
	693	.ctl_name = NET_TCP_SLOW_START_AFTER_IDLE,
	694	.procname = "tcp_slow_start_after_idle",
	695	.data = &sysctl_tcp_slow_start_after_idle,
	696	.maxlen = sizeof(int),
	697	.mode = 0644,
	698	.proc_handler = &proc_dointvec
	699	},
446fda4f PM	700	#ifdef CONFIG_NETLABEL
	701	{
	702	.ctl_name = NET_CIPSOV4_CACHE_ENABLE,
	703	.procname = "cipso_cache_enable",
	704	.data = &cipso_v4_cache_enabled,
	705	.maxlen = sizeof(int),
	706	.mode = 0644,
	707	.proc_handler = &proc_dointvec,
	708	},
	709	{
	710	.ctl_name = NET_CIPSOV4_CACHE_BUCKET_SIZE,
	711	.procname = "cipso_cache_bucket_size",
	712	.data = &cipso_v4_cache_bucketsize,
	713	.maxlen = sizeof(int),
	714	.mode = 0644,
	715	.proc_handler = &proc_dointvec,
	716	},
	717	{
	718	.ctl_name = NET_CIPSOV4_RBM_OPTFMT,
	719	.procname = "cipso_rbm_optfmt",
	720	.data = &cipso_v4_rbm_optfmt,
	721	.maxlen = sizeof(int),
	722	.mode = 0644,
	723	.proc_handler = &proc_dointvec,
	724	},
	725	{
	726	.ctl_name = NET_CIPSOV4_RBM_STRICTVALID,
	727	.procname = "cipso_rbm_strictvalid",
	728	.data = &cipso_v4_rbm_strictvalid,
	729	.maxlen = sizeof(int),
	730	.mode = 0644,
	731	.proc_handler = &proc_dointvec,
	732	},
	733	#endif /* CONFIG_NETLABEL */
1da177e4 LT	734	{ .ctl_name = 0 }
	735	};
	736
	737	#endif /* CONFIG_SYSCTL */
	738
	739	EXPORT_SYMBOL(ipv4_config);