[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/config.h>
#include <linux/igmp.h>
#include <net/snmp.h>
#include <net/icmp.h>
#include <net/ip.h>
#include <net/route.h>
#include <net/tcp.h>

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

#ifdef CONFIG_SYSCTL
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_AUTOCONFIG,
		.procname	= "ip_autoconfig",
		.data		= &ipv4_config.autoconfig,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
        {
		.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_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 = 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>
	13	#include <linux/config.h>
20380731	14	#include <linux/igmp.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>
	20
	21	/* From af_inet.c */
	22	extern int sysctl_ip_nonlocal_bind;
	23
1da177e4 LT	24	#ifdef CONFIG_SYSCTL
	25	static int tcp_retr1_max = 255;
	26	static int ip_local_port_range_min[] = { 1, 1 };
	27	static int ip_local_port_range_max[] = { 65535, 65535 };
	28	#endif
	29
	30	struct ipv4_config ipv4_config;
	31
1da177e4 LT	32	#ifdef CONFIG_SYSCTL
	33
	34	static
	35	int ipv4_sysctl_forward(ctl_table ctl, int write, struct file filp,
	36	void __user buffer, size_t lenp, loff_t *ppos)
	37	{
	38	int val = ipv4_devconf.forwarding;
	39	int ret;
	40
	41	ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
	42
	43	if (write && ipv4_devconf.forwarding != val)
	44	inet_forward_change();
	45
	46	return ret;
	47	}
	48
	49	static int ipv4_sysctl_forward_strategy(ctl_table *table,
	50	int __user *name, int nlen,
	51	void __user oldval, size_t __user oldlenp,
	52	void __user *newval, size_t newlen,
	53	void **context)
	54	{
	55	int *valp = table->data;
	56	int new;
	57
	58	if (!newval \|\| !newlen)
	59	return 0;
	60
	61	if (newlen != sizeof(int))
	62	return -EINVAL;
	63
	64	if (get_user(new, (int __user *)newval))
	65	return -EFAULT;
	66
	67	if (new == *valp)
	68	return 0;
	69
	70	if (oldval && oldlenp) {
	71	size_t len;
	72
	73	if (get_user(len, oldlenp))
	74	return -EFAULT;
	75
	76	if (len) {
	77	if (len > table->maxlen)
	78	len = table->maxlen;
	79	if (copy_to_user(oldval, valp, len))
	80	return -EFAULT;
	81	if (put_user(len, oldlenp))
	82	return -EFAULT;
	83	}
	84	}
	85
	86	*valp = new;
	87	inet_forward_change();
	88	return 1;
	89	}
	90
317a76f9 SH	91	static int proc_tcp_congestion_control(ctl_table ctl, int write, struct file filp,
	92	void __user buffer, size_t lenp, loff_t *ppos)
	93	{
	94	char val[TCP_CA_NAME_MAX];
	95	ctl_table tbl = {
	96	.data = val,
	97	.maxlen = TCP_CA_NAME_MAX,
	98	};
	99	int ret;
	100
	101	tcp_get_default_congestion_control(val);
	102
	103	ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
	104	if (write && ret == 0)
	105	ret = tcp_set_default_congestion_control(val);
	106	return ret;
	107	}
	108
20380731 ACM	109	static int sysctl_tcp_congestion_control(ctl_table table, int __user name,
	110	int nlen, void __user *oldval,
	111	size_t __user *oldlenp,
	112	void __user *newval, size_t newlen,
	113	void **context)
317a76f9 SH	114	{
	115	char val[TCP_CA_NAME_MAX];
	116	ctl_table tbl = {
	117	.data = val,
	118	.maxlen = TCP_CA_NAME_MAX,
	119	};
	120	int ret;
	121
	122	tcp_get_default_congestion_control(val);
	123	ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen,
	124	context);
	125	if (ret == 0 && newval && newlen)
	126	ret = tcp_set_default_congestion_control(val);
	127	return ret;
	128	}
	129
	130
1da177e4 LT	131	ctl_table ipv4_table[] = {
	132	{
	133	.ctl_name = NET_IPV4_TCP_TIMESTAMPS,
	134	.procname = "tcp_timestamps",
	135	.data = &sysctl_tcp_timestamps,
	136	.maxlen = sizeof(int),
	137	.mode = 0644,
	138	.proc_handler = &proc_dointvec
	139	},
	140	{
	141	.ctl_name = NET_IPV4_TCP_WINDOW_SCALING,
	142	.procname = "tcp_window_scaling",
	143	.data = &sysctl_tcp_window_scaling,
	144	.maxlen = sizeof(int),
	145	.mode = 0644,
	146	.proc_handler = &proc_dointvec
	147	},
	148	{
	149	.ctl_name = NET_IPV4_TCP_SACK,
	150	.procname = "tcp_sack",
	151	.data = &sysctl_tcp_sack,
	152	.maxlen = sizeof(int),
	153	.mode = 0644,
	154	.proc_handler = &proc_dointvec
	155	},
	156	{
	157	.ctl_name = NET_IPV4_TCP_RETRANS_COLLAPSE,
	158	.procname = "tcp_retrans_collapse",
	159	.data = &sysctl_tcp_retrans_collapse,
	160	.maxlen = sizeof(int),
	161	.mode = 0644,
	162	.proc_handler = &proc_dointvec
	163	},
	164	{
	165	.ctl_name = NET_IPV4_FORWARD,
	166	.procname = "ip_forward",
	167	.data = &ipv4_devconf.forwarding,
	168	.maxlen = sizeof(int),
	169	.mode = 0644,
	170	.proc_handler = &ipv4_sysctl_forward,
	171	.strategy = &ipv4_sysctl_forward_strategy
	172	},
	173	{
	174	.ctl_name = NET_IPV4_DEFAULT_TTL,
	175	.procname = "ip_default_ttl",
	176	.data = &sysctl_ip_default_ttl,
	177	.maxlen = sizeof(int),
	178	.mode = 0644,
	179	.proc_handler = &ipv4_doint_and_flush,
	180	.strategy = &ipv4_doint_and_flush_strategy,
	181	},
	182	{
	183	.ctl_name = NET_IPV4_AUTOCONFIG,
	184	.procname = "ip_autoconfig",
	185	.data = &ipv4_config.autoconfig,
	186	.maxlen = sizeof(int),
	187	.mode = 0644,
	188	.proc_handler = &proc_dointvec
	189	},
	190	{
	191	.ctl_name = NET_IPV4_NO_PMTU_DISC,
	192	.procname = "ip_no_pmtu_disc",
	193	.data = &ipv4_config.no_pmtu_disc,
	194	.maxlen = sizeof(int),
195	.mode = 0644,
196	.proc_handler = &proc_dointvec
197	},
198	{
199	.ctl_name = NET_IPV4_NONLOCAL_BIND,
200	.procname = "ip_nonlocal_bind",
201	.data = &sysctl_ip_nonlocal_bind,
202	.maxlen = sizeof(int),
203	.mode = 0644,
204	.proc_handler = &proc_dointvec
205	},
206	{
207	.ctl_name = NET_IPV4_TCP_SYN_RETRIES,
208	.procname = "tcp_syn_retries",
209	.data = &sysctl_tcp_syn_retries,
210	.maxlen = sizeof(int),
211	.mode = 0644,
212	.proc_handler = &proc_dointvec
213	},
214	{
215	.ctl_name = NET_TCP_SYNACK_RETRIES,
216	.procname = "tcp_synack_retries",
217	.data = &sysctl_tcp_synack_retries,
218	.maxlen = sizeof(int),
219	.mode = 0644,
220	.proc_handler = &proc_dointvec
221	},
222	{
223	.ctl_name = NET_TCP_MAX_ORPHANS,
224	.procname = "tcp_max_orphans",
225	.data = &sysctl_tcp_max_orphans,
226	.maxlen = sizeof(int),
227	.mode = 0644,
228	.proc_handler = &proc_dointvec
229	},
230	{
231	.ctl_name = NET_TCP_MAX_TW_BUCKETS,
232	.procname = "tcp_max_tw_buckets",
295ff7ed	233	.data = &tcp_death_row.sysctl_max_tw_buckets,
1da177e4 LT	234	.maxlen = sizeof(int),
	235	.mode = 0644,
	236	.proc_handler = &proc_dointvec
	237	},
	238	{
	239	.ctl_name = NET_IPV4_IPFRAG_HIGH_THRESH,
	240	.procname = "ipfrag_high_thresh",
	241	.data = &sysctl_ipfrag_high_thresh,
	242	.maxlen = sizeof(int),
	243	.mode = 0644,
	244	.proc_handler = &proc_dointvec
	245	},
	246	{
	247	.ctl_name = NET_IPV4_IPFRAG_LOW_THRESH,
	248	.procname = "ipfrag_low_thresh",
	249	.data = &sysctl_ipfrag_low_thresh,
	250	.maxlen = sizeof(int),
	251	.mode = 0644,
	252	.proc_handler = &proc_dointvec
	253	},
	254	{
	255	.ctl_name = NET_IPV4_DYNADDR,
	256	.procname = "ip_dynaddr",
	257	.data = &sysctl_ip_dynaddr,
	258	.maxlen = sizeof(int),
	259	.mode = 0644,
	260	.proc_handler = &proc_dointvec
	261	},
	262	{
	263	.ctl_name = NET_IPV4_IPFRAG_TIME,
	264	.procname = "ipfrag_time",
	265	.data = &sysctl_ipfrag_time,
	266	.maxlen = sizeof(int),
	267	.mode = 0644,
	268	.proc_handler = &proc_dointvec_jiffies,
	269	.strategy = &sysctl_jiffies
	270	},
	271	{
	272	.ctl_name = NET_IPV4_TCP_KEEPALIVE_TIME,
	273	.procname = "tcp_keepalive_time",
	274	.data = &sysctl_tcp_keepalive_time,
	275	.maxlen = sizeof(int),
	276	.mode = 0644,
	277	.proc_handler = &proc_dointvec_jiffies,
	278	.strategy = &sysctl_jiffies
	279	},
	280	{
	281	.ctl_name = NET_IPV4_TCP_KEEPALIVE_PROBES,
	282	.procname = "tcp_keepalive_probes",
	283	.data = &sysctl_tcp_keepalive_probes,
	284	.maxlen = sizeof(int),
	285	.mode = 0644,
	286	.proc_handler = &proc_dointvec
	287	},
	288	{
	289	.ctl_name = NET_IPV4_TCP_KEEPALIVE_INTVL,
	290	.procname = "tcp_keepalive_intvl",
	291	.data = &sysctl_tcp_keepalive_intvl,
	292	.maxlen = sizeof(int),
	293	.mode = 0644,
	294	.proc_handler = &proc_dointvec_jiffies,
	295	.strategy = &sysctl_jiffies
	296	},
	297	{
298	.ctl_name = NET_IPV4_TCP_RETRIES1,
299	.procname = "tcp_retries1",
300	.data = &sysctl_tcp_retries1,
301	.maxlen = sizeof(int),
302	.mode = 0644,
303	.proc_handler = &proc_dointvec_minmax,
304	.strategy = &sysctl_intvec,
305	.extra2 = &tcp_retr1_max
306	},
307	{
308	.ctl_name = NET_IPV4_TCP_RETRIES2,
309	.procname = "tcp_retries2",
310	.data = &sysctl_tcp_retries2,
311	.maxlen = sizeof(int),
312	.mode = 0644,
313	.proc_handler = &proc_dointvec
314	},
315	{
316	.ctl_name = NET_IPV4_TCP_FIN_TIMEOUT,
317	.procname = "tcp_fin_timeout",
318	.data = &sysctl_tcp_fin_timeout,
319	.maxlen = sizeof(int),
320	.mode = 0644,
321	.proc_handler = &proc_dointvec_jiffies,
322	.strategy = &sysctl_jiffies
323	},
324	#ifdef CONFIG_SYN_COOKIES
325	{
326	.ctl_name = NET_TCP_SYNCOOKIES,
327	.procname = "tcp_syncookies",
328	.data = &sysctl_tcp_syncookies,
329	.maxlen = sizeof(int),
330	.mode = 0644,
331	.proc_handler = &proc_dointvec
332	},
333	#endif
334	{
335	.ctl_name = NET_TCP_TW_RECYCLE,
336	.procname = "tcp_tw_recycle",
295ff7ed	337	.data = &tcp_death_row.sysctl_tw_recycle,
1da177e4 LT	338	.maxlen = sizeof(int),
	339	.mode = 0644,
	340	.proc_handler = &proc_dointvec
	341	},
	342	{
	343	.ctl_name = NET_TCP_ABORT_ON_OVERFLOW,
	344	.procname = "tcp_abort_on_overflow",
	345	.data = &sysctl_tcp_abort_on_overflow,
	346	.maxlen = sizeof(int),
	347	.mode = 0644,
	348	.proc_handler = &proc_dointvec
	349	},
	350	{
	351	.ctl_name = NET_TCP_STDURG,
	352	.procname = "tcp_stdurg",
	353	.data = &sysctl_tcp_stdurg,
	354	.maxlen = sizeof(int),
	355	.mode = 0644,
	356	.proc_handler = &proc_dointvec
	357	},
	358	{
	359	.ctl_name = NET_TCP_RFC1337,
	360	.procname = "tcp_rfc1337",
	361	.data = &sysctl_tcp_rfc1337,
	362	.maxlen = sizeof(int),
	363	.mode = 0644,
	364	.proc_handler = &proc_dointvec
	365	},
	366	{
	367	.ctl_name = NET_TCP_MAX_SYN_BACKLOG,
	368	.procname = "tcp_max_syn_backlog",
	369	.data = &sysctl_max_syn_backlog,
	370	.maxlen = sizeof(int),
	371	.mode = 0644,
	372	.proc_handler = &proc_dointvec
	373	},
	374	{
	375	.ctl_name = NET_IPV4_LOCAL_PORT_RANGE,
	376	.procname = "ip_local_port_range",
	377	.data = &sysctl_local_port_range,
	378	.maxlen = sizeof(sysctl_local_port_range),
	379	.mode = 0644,
	380	.proc_handler = &proc_dointvec_minmax,
	381	.strategy = &sysctl_intvec,
	382	.extra1 = ip_local_port_range_min,
	383	.extra2 = ip_local_port_range_max
	384	},
	385	{
	386	.ctl_name = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
	387	.procname = "icmp_echo_ignore_all",
	388	.data = &sysctl_icmp_echo_ignore_all,
	389	.maxlen = sizeof(int),
	390	.mode = 0644,
	391	.proc_handler = &proc_dointvec
	392	},
	393	{
	394	.ctl_name = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
	395	.procname = "icmp_echo_ignore_broadcasts",
	396	.data = &sysctl_icmp_echo_ignore_broadcasts,
	397	.maxlen = sizeof(int),
	398	.mode = 0644,
	399	.proc_handler = &proc_dointvec
	400	},
	401	{
402	.ctl_name = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
403	.procname = "icmp_ignore_bogus_error_responses",
404	.data = &sysctl_icmp_ignore_bogus_error_responses,
405	.maxlen = sizeof(int),
406	.mode = 0644,
407	.proc_handler = &proc_dointvec
408	},
1c2fb7f9 S	409	{
	410	.ctl_name = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
	411	.procname = "icmp_errors_use_inbound_ifaddr",
	412	.data = &sysctl_icmp_errors_use_inbound_ifaddr,
	413	.maxlen = sizeof(int),
	414	.mode = 0644,
	415	.proc_handler = &proc_dointvec
	416	},
1da177e4 LT	417	{
	418	.ctl_name = NET_IPV4_ROUTE,
	419	.procname = "route",
	420	.maxlen = 0,
	421	.mode = 0555,
	422	.child = ipv4_route_table
	423	},
	424	#ifdef CONFIG_IP_MULTICAST
	425	{
	426	.ctl_name = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
	427	.procname = "igmp_max_memberships",
	428	.data = &sysctl_igmp_max_memberships,
	429	.maxlen = sizeof(int),
	430	.mode = 0644,
	431	.proc_handler = &proc_dointvec
	432	},
	433
	434	#endif
	435	{
	436	.ctl_name = NET_IPV4_IGMP_MAX_MSF,
	437	.procname = "igmp_max_msf",
	438	.data = &sysctl_igmp_max_msf,
	439	.maxlen = sizeof(int),
	440	.mode = 0644,
	441	.proc_handler = &proc_dointvec
	442	},
	443	{
	444	.ctl_name = NET_IPV4_INET_PEER_THRESHOLD,
	445	.procname = "inet_peer_threshold",
	446	.data = &inet_peer_threshold,
	447	.maxlen = sizeof(int),
	448	.mode = 0644,
	449	.proc_handler = &proc_dointvec
	450	},
	451	{
	452	.ctl_name = NET_IPV4_INET_PEER_MINTTL,
	453	.procname = "inet_peer_minttl",
	454	.data = &inet_peer_minttl,
	455	.maxlen = sizeof(int),
	456	.mode = 0644,
	457	.proc_handler = &proc_dointvec_jiffies,
	458	.strategy = &sysctl_jiffies
	459	},
	460	{
	461	.ctl_name = NET_IPV4_INET_PEER_MAXTTL,
	462	.procname = "inet_peer_maxttl",
	463	.data = &inet_peer_maxttl,
	464	.maxlen = sizeof(int),
	465	.mode = 0644,
	466	.proc_handler = &proc_dointvec_jiffies,
	467	.strategy = &sysctl_jiffies
	468	},
	469	{
	470	.ctl_name = NET_IPV4_INET_PEER_GC_MINTIME,
	471	.procname = "inet_peer_gc_mintime",
	472	.data = &inet_peer_gc_mintime,
	473	.maxlen = sizeof(int),
	474	.mode = 0644,
	475	.proc_handler = &proc_dointvec_jiffies,
	476	.strategy = &sysctl_jiffies
	477	},
	478	{
	479	.ctl_name = NET_IPV4_INET_PEER_GC_MAXTIME,
	480	.procname = "inet_peer_gc_maxtime",
481	.data = &inet_peer_gc_maxtime,
482	.maxlen = sizeof(int),
483	.mode = 0644,
484	.proc_handler = &proc_dointvec_jiffies,
485	.strategy = &sysctl_jiffies
486	},
487	{
488	.ctl_name = NET_TCP_ORPHAN_RETRIES,
489	.procname = "tcp_orphan_retries",
490	.data = &sysctl_tcp_orphan_retries,
491	.maxlen = sizeof(int),
492	.mode = 0644,
493	.proc_handler = &proc_dointvec
494	},
495	{
496	.ctl_name = NET_TCP_FACK,
497	.procname = "tcp_fack",
498	.data = &sysctl_tcp_fack,
499	.maxlen = sizeof(int),
500	.mode = 0644,
501	.proc_handler = &proc_dointvec
502	},
503	{
504	.ctl_name = NET_TCP_REORDERING,
505	.procname = "tcp_reordering",
506	.data = &sysctl_tcp_reordering,
507	.maxlen = sizeof(int),
508	.mode = 0644,
509	.proc_handler = &proc_dointvec
510	},
511	{
512	.ctl_name = NET_TCP_ECN,
513	.procname = "tcp_ecn",
514	.data = &sysctl_tcp_ecn,
515	.maxlen = sizeof(int),
516	.mode = 0644,
517	.proc_handler = &proc_dointvec
518	},
519	{
520	.ctl_name = NET_TCP_DSACK,
521	.procname = "tcp_dsack",
522	.data = &sysctl_tcp_dsack,
523	.maxlen = sizeof(int),
524	.mode = 0644,
525	.proc_handler = &proc_dointvec
526	},
527	{
528	.ctl_name = NET_TCP_MEM,
529	.procname = "tcp_mem",
530	.data = &sysctl_tcp_mem,
531	.maxlen = sizeof(sysctl_tcp_mem),
532	.mode = 0644,
533	.proc_handler = &proc_dointvec
534	},
535	{
536	.ctl_name = NET_TCP_WMEM,
537	.procname = "tcp_wmem",
538	.data = &sysctl_tcp_wmem,
539	.maxlen = sizeof(sysctl_tcp_wmem),
540	.mode = 0644,
541	.proc_handler = &proc_dointvec
542	},
543	{
544	.ctl_name = NET_TCP_RMEM,
545	.procname = "tcp_rmem",
546	.data = &sysctl_tcp_rmem,
547	.maxlen = sizeof(sysctl_tcp_rmem),
548	.mode = 0644,
549	.proc_handler = &proc_dointvec
550	},
551	{
552	.ctl_name = NET_TCP_APP_WIN,
553	.procname = "tcp_app_win",
554	.data = &sysctl_tcp_app_win,
555	.maxlen = sizeof(int),
556	.mode = 0644,
557	.proc_handler = &proc_dointvec
558	},
559	{
560	.ctl_name = NET_TCP_ADV_WIN_SCALE,
561	.procname = "tcp_adv_win_scale",
562	.data = &sysctl_tcp_adv_win_scale,
563	.maxlen = sizeof(int),
564	.mode = 0644,
565	.proc_handler = &proc_dointvec
566	},
567	{
568	.ctl_name = NET_IPV4_ICMP_RATELIMIT,
569	.procname = "icmp_ratelimit",
570	.data = &sysctl_icmp_ratelimit,
571	.maxlen = sizeof(int),
572	.mode = 0644,
573	.proc_handler = &proc_dointvec
574	},
575	{
576	.ctl_name = NET_IPV4_ICMP_RATEMASK,
577	.procname = "icmp_ratemask",
578	.data = &sysctl_icmp_ratemask,
579	.maxlen = sizeof(int),
580	.mode = 0644,
581	.proc_handler = &proc_dointvec
582	},
583	{
584	.ctl_name = NET_TCP_TW_REUSE,
585	.procname = "tcp_tw_reuse",
586	.data = &sysctl_tcp_tw_reuse,
587	.maxlen = sizeof(int),
588	.mode = 0644,
589	.proc_handler = &proc_dointvec
590	},
591	{
592	.ctl_name = NET_TCP_FRTO,
593	.procname = "tcp_frto",
594	.data = &sysctl_tcp_frto,
595	.maxlen = sizeof(int),
596	.mode = 0644,
597	.proc_handler = &proc_dointvec
598	},
599	{
600	.ctl_name = NET_TCP_LOW_LATENCY,
601	.procname = "tcp_low_latency",
602	.data = &sysctl_tcp_low_latency,
603	.maxlen = sizeof(int),
604	.mode = 0644,
605	.proc_handler = &proc_dointvec
606	},
607	{
608	.ctl_name = NET_IPV4_IPFRAG_SECRET_INTERVAL,
609	.procname = "ipfrag_secret_interval",
610	.data = &sysctl_ipfrag_secret_interval,
611	.maxlen = sizeof(int),
612	.mode = 0644,
613	.proc_handler = &proc_dointvec_jiffies,
614	.strategy = &sysctl_jiffies
615	},
616	{
617	.ctl_name = NET_TCP_NO_METRICS_SAVE,
618	.procname = "tcp_no_metrics_save",
619	.data = &sysctl_tcp_nometrics_save,
620	.maxlen = sizeof(int),
621	.mode = 0644,
622	.proc_handler = &proc_dointvec,
623	},
1da177e4 LT	624	{
	625	.ctl_name = NET_TCP_MODERATE_RCVBUF,
	626	.procname = "tcp_moderate_rcvbuf",
	627	.data = &sysctl_tcp_moderate_rcvbuf,
	628	.maxlen = sizeof(int),
	629	.mode = 0644,
	630	.proc_handler = &proc_dointvec,
	631	},
	632	{
	633	.ctl_name = NET_TCP_TSO_WIN_DIVISOR,
	634	.procname = "tcp_tso_win_divisor",
	635	.data = &sysctl_tcp_tso_win_divisor,
	636	.maxlen = sizeof(int),
	637	.mode = 0644,
	638	.proc_handler = &proc_dointvec,
	639	},
	640	{
317a76f9 SH	641	.ctl_name = NET_TCP_CONG_CONTROL,
317a76f9 SH	642	.procname = "tcp_congestion_control",
1da177e4	643	.mode = 0644,
317a76f9 SH	644	.maxlen = TCP_CA_NAME_MAX,
	645	.proc_handler = &proc_tcp_congestion_control,
	646	.strategy = &sysctl_tcp_congestion_control,
1da177e4	647	},
317a76f9	648
1da177e4 LT	649	{ .ctl_name = 0 }
	650	};
	651
	652	#endif /* CONFIG_SYSCTL */
	653
	654	EXPORT_SYMBOL(ipv4_config);