[net-next-2.6.git] / net / ipv4 / xfrm4_policy.c

/*
 * xfrm4_policy.c
 *
 * Changes:
 *	Kazunori MIYAZAWA @USAGI
 * 	YOSHIFUJI Hideaki @USAGI
 *		Split up af-specific portion
 *
 */

#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/inetdevice.h>
#include <net/dst.h>
#include <net/xfrm.h>
#include <net/ip.h>

static struct dst_ops xfrm4_dst_ops;
static struct xfrm_policy_afinfo xfrm4_policy_afinfo;

static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos,
					  xfrm_address_t *saddr,
					  xfrm_address_t *daddr)
{
	struct flowi fl = {
		.nl_u = {
			.ip4_u = {
				.tos = tos,
				.daddr = daddr->a4,
			},
		},
	};
	struct dst_entry *dst;
	struct rtable *rt;
	int err;

	if (saddr)
		fl.fl4_src = saddr->a4;

	err = __ip_route_output_key(net, &rt, &fl);
	dst = &rt->u.dst;
	if (err)
		dst = ERR_PTR(err);
	return dst;
}

static int xfrm4_get_saddr(struct net *net,
			   xfrm_address_t *saddr, xfrm_address_t *daddr)
{
	struct dst_entry *dst;
	struct rtable *rt;

	dst = xfrm4_dst_lookup(net, 0, NULL, daddr);
	if (IS_ERR(dst))
		return -EHOSTUNREACH;

	rt = (struct rtable *)dst;
	saddr->a4 = rt->rt_src;
	dst_release(dst);
	return 0;
}

static struct dst_entry *
__xfrm4_find_bundle(struct flowi *fl, struct xfrm_policy *policy)
{
	struct dst_entry *dst;

	read_lock_bh(&policy->lock);
	for (dst = policy->bundles; dst; dst = dst->next) {
		struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
		if (xdst->u.rt.fl.oif == fl->oif &&	/*XXX*/
		    xdst->u.rt.fl.fl4_dst == fl->fl4_dst &&
		    xdst->u.rt.fl.fl4_src == fl->fl4_src &&
		    xdst->u.rt.fl.fl4_tos == fl->fl4_tos &&
		    xfrm_bundle_ok(policy, xdst, fl, AF_INET, 0)) {
			dst_clone(dst);
			break;
		}
	}
	read_unlock_bh(&policy->lock);
	return dst;
}

static int xfrm4_get_tos(struct flowi *fl)
{
	return fl->fl4_tos;
}

static int xfrm4_init_path(struct xfrm_dst *path, struct dst_entry *dst,
			   int nfheader_len)
{
	return 0;
}

static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev)
{
	struct rtable *rt = (struct rtable *)xdst->route;

	xdst->u.rt.fl = rt->fl;

	xdst->u.dst.dev = dev;
	dev_hold(dev);

	xdst->u.rt.idev = in_dev_get(dev);
	if (!xdst->u.rt.idev)
		return -ENODEV;

	xdst->u.rt.peer = rt->peer;
	if (rt->peer)
		atomic_inc(&rt->peer->refcnt);

	/* Sheit... I remember I did this right. Apparently,
	 * it was magically lost, so this code needs audit */
	xdst->u.rt.rt_flags = rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST |
					      RTCF_LOCAL);
	xdst->u.rt.rt_type = rt->rt_type;
	xdst->u.rt.rt_src = rt->rt_src;
	xdst->u.rt.rt_dst = rt->rt_dst;
	xdst->u.rt.rt_gateway = rt->rt_gateway;
	xdst->u.rt.rt_spec_dst = rt->rt_spec_dst;

	return 0;
}

static void
_decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
{
	struct iphdr *iph = ip_hdr(skb);
	u8 *xprth = skb_network_header(skb) + iph->ihl * 4;

	memset(fl, 0, sizeof(struct flowi));
	if (!(iph->frag_off & htons(IP_MF | IP_OFFSET))) {
		switch (iph->protocol) {
		case IPPROTO_UDP:
		case IPPROTO_UDPLITE:
		case IPPROTO_TCP:
		case IPPROTO_SCTP:
		case IPPROTO_DCCP:
			if (xprth + 4 < skb->data ||
			    pskb_may_pull(skb, xprth + 4 - skb->data)) {
				__be16 *ports = (__be16 *)xprth;

				fl->fl_ip_sport = ports[!!reverse];
				fl->fl_ip_dport = ports[!reverse];
			}
			break;

		case IPPROTO_ICMP:
			if (pskb_may_pull(skb, xprth + 2 - skb->data)) {
				u8 *icmp = xprth;

				fl->fl_icmp_type = icmp[0];
				fl->fl_icmp_code = icmp[1];
			}
			break;

		case IPPROTO_ESP:
			if (pskb_may_pull(skb, xprth + 4 - skb->data)) {
				__be32 *ehdr = (__be32 *)xprth;

				fl->fl_ipsec_spi = ehdr[0];
			}
			break;

		case IPPROTO_AH:
			if (pskb_may_pull(skb, xprth + 8 - skb->data)) {
				__be32 *ah_hdr = (__be32*)xprth;

				fl->fl_ipsec_spi = ah_hdr[1];
			}
			break;

		case IPPROTO_COMP:
			if (pskb_may_pull(skb, xprth + 4 - skb->data)) {
				__be16 *ipcomp_hdr = (__be16 *)xprth;

				fl->fl_ipsec_spi = htonl(ntohs(ipcomp_hdr[1]));
			}
			break;
		default:
			fl->fl_ipsec_spi = 0;
			break;
		}
	}
	fl->proto = iph->protocol;
	fl->fl4_dst = reverse ? iph->saddr : iph->daddr;
	fl->fl4_src = reverse ? iph->daddr : iph->saddr;
	fl->fl4_tos = iph->tos;
}

static inline int xfrm4_garbage_collect(struct dst_ops *ops)
{
	xfrm4_policy_afinfo.garbage_collect(&init_net);
	return (atomic_read(&xfrm4_dst_ops.entries) > xfrm4_dst_ops.gc_thresh*2);
}

static void xfrm4_update_pmtu(struct dst_entry *dst, u32 mtu)
{
	struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
	struct dst_entry *path = xdst->route;

	path->ops->update_pmtu(path, mtu);
}

static void xfrm4_dst_destroy(struct dst_entry *dst)
{
	struct xfrm_dst *xdst = (struct xfrm_dst *)dst;

	if (likely(xdst->u.rt.idev))
		in_dev_put(xdst->u.rt.idev);
	if (likely(xdst->u.rt.peer))
		inet_putpeer(xdst->u.rt.peer);
	xfrm_dst_destroy(xdst);
}

static void xfrm4_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
			     int unregister)
{
	struct xfrm_dst *xdst;

	if (!unregister)
		return;

	xdst = (struct xfrm_dst *)dst;
	if (xdst->u.rt.idev->dev == dev) {
		struct in_device *loopback_idev =
			in_dev_get(dev_net(dev)->loopback_dev);
		BUG_ON(!loopback_idev);

		do {
			in_dev_put(xdst->u.rt.idev);
			xdst->u.rt.idev = loopback_idev;
			in_dev_hold(loopback_idev);
			xdst = (struct xfrm_dst *)xdst->u.dst.child;
		} while (xdst->u.dst.xfrm);

		__in_dev_put(loopback_idev);
	}

	xfrm_dst_ifdown(dst, dev);
}

static struct dst_ops xfrm4_dst_ops = {
	.family =		AF_INET,
	.protocol =		cpu_to_be16(ETH_P_IP),
	.gc =			xfrm4_garbage_collect,
	.update_pmtu =		xfrm4_update_pmtu,
	.destroy =		xfrm4_dst_destroy,
	.ifdown =		xfrm4_dst_ifdown,
	.local_out =		__ip_local_out,
	.gc_thresh =		1024,
	.entries =		ATOMIC_INIT(0),
};

static struct xfrm_policy_afinfo xfrm4_policy_afinfo = {
	.family = 		AF_INET,
	.dst_ops =		&xfrm4_dst_ops,
	.dst_lookup =		xfrm4_dst_lookup,
	.get_saddr =		xfrm4_get_saddr,
	.find_bundle = 		__xfrm4_find_bundle,
	.decode_session =	_decode_session4,
	.get_tos =		xfrm4_get_tos,
	.init_path =		xfrm4_init_path,
	.fill_dst =		xfrm4_fill_dst,
};

#ifdef CONFIG_SYSCTL
static struct ctl_table xfrm4_policy_table[] = {
	{
		.procname       = "xfrm4_gc_thresh",
		.data           = &xfrm4_dst_ops.gc_thresh,
		.maxlen         = sizeof(int),
		.mode           = 0644,
		.proc_handler   = proc_dointvec,
	},
	{ }
};

static struct ctl_table_header *sysctl_hdr;
#endif

static void __init xfrm4_policy_init(void)
{
	xfrm_policy_register_afinfo(&xfrm4_policy_afinfo);
}

static void __exit xfrm4_policy_fini(void)
{
#ifdef CONFIG_SYSCTL
	if (sysctl_hdr)
		unregister_net_sysctl_table(sysctl_hdr);
#endif
	xfrm_policy_unregister_afinfo(&xfrm4_policy_afinfo);
}

void __init xfrm4_init(int rt_max_size)
{
	xfrm4_state_init();
	xfrm4_policy_init();
	/*
	 * Select a default value for the gc_thresh based on the main route
	 * table hash size.  It seems to me the worst case scenario is when
	 * we have ipsec operating in transport mode, in which we create a
	 * dst_entry per socket.  The xfrm gc algorithm starts trying to remove
	 * entries at gc_thresh, and prevents new allocations as 2*gc_thresh
	 * so lets set an initial xfrm gc_thresh value at the rt_max_size/2.
	 * That will let us store an ipsec connection per route table entry,
	 * and start cleaning when were 1/2 full
	 */
	xfrm4_dst_ops.gc_thresh = rt_max_size/2;
#ifdef CONFIG_SYSCTL
	sysctl_hdr = register_net_sysctl_table(&init_net, net_ipv4_ctl_path,
						xfrm4_policy_table);
#endif
}
Commit	Line	Data
e905a9ed	1	/*
1da177e4 LT	2	* xfrm4_policy.c
	3	*
	4	* Changes:
	5	* Kazunori MIYAZAWA @USAGI
	6	* YOSHIFUJI Hideaki @USAGI
	7	* Split up af-specific portion
e905a9ed	8	*
1da177e4 LT	9	*/
1da177e4 LT	10
66cdb3ca HX	11	#include <linux/err.h>
66cdb3ca HX	12	#include <linux/kernel.h>
aabc9761	13	#include <linux/inetdevice.h>
45ff5a3f	14	#include <net/dst.h>
1da177e4 LT	15	#include <net/xfrm.h>
	16	#include <net/ip.h>
	17
	18	static struct dst_ops xfrm4_dst_ops;
	19	static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
	20
c5b3cf46 AD	21	static struct dst_entry xfrm4_dst_lookup(struct net net, int tos,
c5b3cf46 AD	22	xfrm_address_t *saddr,
66cdb3ca	23	xfrm_address_t *daddr)
1da177e4	24	{
66cdb3ca	25	struct flowi fl = {
a1e59abf PM	26	.nl_u = {
a1e59abf PM	27	.ip4_u = {
66cdb3ca	28	.tos = tos,
a1e59abf PM	29	.daddr = daddr->a4,
	30	},
	31	},
	32	};
66cdb3ca HX	33	struct dst_entry *dst;
	34	struct rtable *rt;
	35	int err;
a1e59abf	36
66cdb3ca HX	37	if (saddr)
	38	fl.fl4_src = saddr->a4;
	39
c5b3cf46	40	err = __ip_route_output_key(net, &rt, &fl);
66cdb3ca HX	41	dst = &rt->u.dst;
	42	if (err)
	43	dst = ERR_PTR(err);
	44	return dst;
	45	}
	46
fbda33b2 AD	47	static int xfrm4_get_saddr(struct net *net,
fbda33b2 AD	48	xfrm_address_t saddr, xfrm_address_t daddr)
66cdb3ca HX	49	{
	50	struct dst_entry *dst;
	51	struct rtable *rt;
	52
fbda33b2	53	dst = xfrm4_dst_lookup(net, 0, NULL, daddr);
66cdb3ca HX	54	if (IS_ERR(dst))
	55	return -EHOSTUNREACH;
	56
	57	rt = (struct rtable *)dst;
	58	saddr->a4 = rt->rt_src;
	59	dst_release(dst);
	60	return 0;
a1e59abf PM	61	}
a1e59abf PM	62
1da177e4 LT	63	static struct dst_entry *
	64	__xfrm4_find_bundle(struct flowi fl, struct xfrm_policy policy)
	65	{
	66	struct dst_entry *dst;
	67
	68	read_lock_bh(&policy->lock);
	69	for (dst = policy->bundles; dst; dst = dst->next) {
5a5f3a8d	70	struct xfrm_dst xdst = (struct xfrm_dst )dst;
1da177e4 LT	71	if (xdst->u.rt.fl.oif == fl->oif && /XXX/
1da177e4 LT	72	xdst->u.rt.fl.fl4_dst == fl->fl4_dst &&
e905a9ed YH	73	xdst->u.rt.fl.fl4_src == fl->fl4_src &&
e905a9ed YH	74	xdst->u.rt.fl.fl4_tos == fl->fl4_tos &&
5b368e61	75	xfrm_bundle_ok(policy, xdst, fl, AF_INET, 0)) {
1da177e4 LT	76	dst_clone(dst);
	77	break;
	78	}
	79	}
	80	read_unlock_bh(&policy->lock);
	81	return dst;
	82	}
	83
25ee3286	84	static int xfrm4_get_tos(struct flowi *fl)
1da177e4	85	{
25ee3286 HX	86	return fl->fl4_tos;
25ee3286 HX	87	}
1da177e4	88
a1b05140 MN	89	static int xfrm4_init_path(struct xfrm_dst path, struct dst_entry dst,
	90	int nfheader_len)
	91	{
	92	return 0;
	93	}
	94
25ee3286 HX	95	static int xfrm4_fill_dst(struct xfrm_dst xdst, struct net_device dev)
	96	{
	97	struct rtable rt = (struct rtable )xdst->route;
1da177e4	98
25ee3286	99	xdst->u.rt.fl = rt->fl;
1da177e4	100
25ee3286 HX	101	xdst->u.dst.dev = dev;
25ee3286 HX	102	dev_hold(dev);
43372262	103
25ee3286 HX	104	xdst->u.rt.idev = in_dev_get(dev);
	105	if (!xdst->u.rt.idev)
	106	return -ENODEV;
1da177e4	107
25ee3286 HX	108	xdst->u.rt.peer = rt->peer;
	109	if (rt->peer)
	110	atomic_inc(&rt->peer->refcnt);
66cdb3ca	111
25ee3286 HX	112	/* Sheit... I remember I did this right. Apparently,
	113	* it was magically lost, so this code needs audit */
	114	xdst->u.rt.rt_flags = rt->rt_flags & (RTCF_BROADCAST \| RTCF_MULTICAST \|
	115	RTCF_LOCAL);
	116	xdst->u.rt.rt_type = rt->rt_type;
	117	xdst->u.rt.rt_src = rt->rt_src;
	118	xdst->u.rt.rt_dst = rt->rt_dst;
	119	xdst->u.rt.rt_gateway = rt->rt_gateway;
	120	xdst->u.rt.rt_spec_dst = rt->rt_spec_dst;
1da177e4	121
1da177e4	122	return 0;
1da177e4 LT	123	}
	124
	125	static void
d5422efe	126	_decode_session4(struct sk_buff skb, struct flowi fl, int reverse)
1da177e4	127	{
eddc9ec5	128	struct iphdr *iph = ip_hdr(skb);
d56f90a7	129	u8 xprth = skb_network_header(skb) + iph->ihl 4;
1da177e4 LT	130
	131	memset(fl, 0, sizeof(struct flowi));
	132	if (!(iph->frag_off & htons(IP_MF \| IP_OFFSET))) {
	133	switch (iph->protocol) {
	134	case IPPROTO_UDP:
ba4e58ec	135	case IPPROTO_UDPLITE:
1da177e4 LT	136	case IPPROTO_TCP:
1da177e4 LT	137	case IPPROTO_SCTP:
9e999993	138	case IPPROTO_DCCP:
c615c9f3 WY	139	if (xprth + 4 < skb->data \|\|
c615c9f3 WY	140	pskb_may_pull(skb, xprth + 4 - skb->data)) {
8c689a6e	141	__be16 ports = (__be16 )xprth;
1da177e4	142
d5422efe HX	143	fl->fl_ip_sport = ports[!!reverse];
d5422efe HX	144	fl->fl_ip_dport = ports[!reverse];
1da177e4 LT	145	}
	146	break;
	147
	148	case IPPROTO_ICMP:
	149	if (pskb_may_pull(skb, xprth + 2 - skb->data)) {
	150	u8 *icmp = xprth;
	151
	152	fl->fl_icmp_type = icmp[0];
	153	fl->fl_icmp_code = icmp[1];
	154	}
	155	break;
	156
	157	case IPPROTO_ESP:
	158	if (pskb_may_pull(skb, xprth + 4 - skb->data)) {
4324a174	159	__be32 ehdr = (__be32 )xprth;
1da177e4 LT	160
	161	fl->fl_ipsec_spi = ehdr[0];
	162	}
	163	break;
	164
	165	case IPPROTO_AH:
	166	if (pskb_may_pull(skb, xprth + 8 - skb->data)) {
4324a174	167	__be32 ah_hdr = (__be32)xprth;
1da177e4 LT	168
	169	fl->fl_ipsec_spi = ah_hdr[1];
	170	}
	171	break;
	172
	173	case IPPROTO_COMP:
	174	if (pskb_may_pull(skb, xprth + 4 - skb->data)) {
4324a174	175	__be16 ipcomp_hdr = (__be16 )xprth;
1da177e4	176
4195f814	177	fl->fl_ipsec_spi = htonl(ntohs(ipcomp_hdr[1]));
1da177e4 LT	178	}
	179	break;
	180	default:
	181	fl->fl_ipsec_spi = 0;
	182	break;
3ff50b79	183	}
1da177e4 LT	184	}
1da177e4 LT	185	fl->proto = iph->protocol;
d5422efe HX	186	fl->fl4_dst = reverse ? iph->saddr : iph->daddr;
d5422efe HX	187	fl->fl4_src = reverse ? iph->daddr : iph->saddr;
4da3089f	188	fl->fl4_tos = iph->tos;
1da177e4 LT	189	}
1da177e4 LT	190
569d3645	191	static inline int xfrm4_garbage_collect(struct dst_ops *ops)
1da177e4	192	{
ddcfd796	193	xfrm4_policy_afinfo.garbage_collect(&init_net);
1da177e4 LT	194	return (atomic_read(&xfrm4_dst_ops.entries) > xfrm4_dst_ops.gc_thresh*2);
	195	}
	196
	197	static void xfrm4_update_pmtu(struct dst_entry *dst, u32 mtu)
	198	{
	199	struct xfrm_dst xdst = (struct xfrm_dst )dst;
	200	struct dst_entry *path = xdst->route;
	201
	202	path->ops->update_pmtu(path, mtu);
	203	}
	204
aabc9761 HX	205	static void xfrm4_dst_destroy(struct dst_entry *dst)
	206	{
	207	struct xfrm_dst xdst = (struct xfrm_dst )dst;
	208
	209	if (likely(xdst->u.rt.idev))
	210	in_dev_put(xdst->u.rt.idev);
ed3e37dd	211	if (likely(xdst->u.rt.peer))
26db1677	212	inet_putpeer(xdst->u.rt.peer);
aabc9761 HX	213	xfrm_dst_destroy(xdst);
	214	}
	215
	216	static void xfrm4_dst_ifdown(struct dst_entry dst, struct net_device dev,
	217	int unregister)
	218	{
	219	struct xfrm_dst *xdst;
	220
	221	if (!unregister)
	222	return;
	223
	224	xdst = (struct xfrm_dst *)dst;
	225	if (xdst->u.rt.idev->dev == dev) {
5a3e55d6	226	struct in_device *loopback_idev =
c346dca1	227	in_dev_get(dev_net(dev)->loopback_dev);
aabc9761 HX	228	BUG_ON(!loopback_idev);
	229
	230	do {
	231	in_dev_put(xdst->u.rt.idev);
	232	xdst->u.rt.idev = loopback_idev;
	233	in_dev_hold(loopback_idev);
	234	xdst = (struct xfrm_dst *)xdst->u.dst.child;
	235	} while (xdst->u.dst.xfrm);
	236
	237	__in_dev_put(loopback_idev);
	238	}
	239
	240	xfrm_dst_ifdown(dst, dev);
	241	}
	242
1da177e4 LT	243	static struct dst_ops xfrm4_dst_ops = {
1da177e4 LT	244	.family = AF_INET,
09640e63	245	.protocol = cpu_to_be16(ETH_P_IP),
1da177e4 LT	246	.gc = xfrm4_garbage_collect,
1da177e4 LT	247	.update_pmtu = xfrm4_update_pmtu,
aabc9761 HX	248	.destroy = xfrm4_dst_destroy,
aabc9761 HX	249	.ifdown = xfrm4_dst_ifdown,
862b82c6	250	.local_out = __ip_local_out,
1da177e4	251	.gc_thresh = 1024,
e2422970	252	.entries = ATOMIC_INIT(0),
1da177e4 LT	253	};
	254
	255	static struct xfrm_policy_afinfo xfrm4_policy_afinfo = {
	256	.family = AF_INET,
1da177e4 LT	257	.dst_ops = &xfrm4_dst_ops,
1da177e4 LT	258	.dst_lookup = xfrm4_dst_lookup,
a1e59abf	259	.get_saddr = xfrm4_get_saddr,
1da177e4	260	.find_bundle = __xfrm4_find_bundle,
1da177e4	261	.decode_session = _decode_session4,
25ee3286	262	.get_tos = xfrm4_get_tos,
a1b05140	263	.init_path = xfrm4_init_path,
25ee3286	264	.fill_dst = xfrm4_fill_dst,
1da177e4 LT	265	};
1da177e4 LT	266
f816700a	267	#ifdef CONFIG_SYSCTL
a44a4a00 NH	268	static struct ctl_table xfrm4_policy_table[] = {
a44a4a00 NH	269	{
a44a4a00 NH	270	.procname = "xfrm4_gc_thresh",
	271	.data = &xfrm4_dst_ops.gc_thresh,
	272	.maxlen = sizeof(int),
	273	.mode = 0644,
	274	.proc_handler = proc_dointvec,
	275	},
	276	{ }
	277	};
	278
	279	static struct ctl_table_header *sysctl_hdr;
f816700a	280	#endif
a44a4a00	281
1da177e4 LT	282	static void __init xfrm4_policy_init(void)
	283	{
	284	xfrm_policy_register_afinfo(&xfrm4_policy_afinfo);
	285	}
	286
	287	static void __exit xfrm4_policy_fini(void)
	288	{
f816700a	289	#ifdef CONFIG_SYSCTL
a44a4a00 NH	290	if (sysctl_hdr)
a44a4a00 NH	291	unregister_net_sysctl_table(sysctl_hdr);
f816700a	292	#endif
1da177e4 LT	293	xfrm_policy_unregister_afinfo(&xfrm4_policy_afinfo);
	294	}
	295
a33bc5c1	296	void __init xfrm4_init(int rt_max_size)
1da177e4 LT	297	{
	298	xfrm4_state_init();
	299	xfrm4_policy_init();
a33bc5c1 NH	300	/*
	301	* Select a default value for the gc_thresh based on the main route
	302	* table hash size. It seems to me the worst case scenario is when
	303	* we have ipsec operating in transport mode, in which we create a
	304	* dst_entry per socket. The xfrm gc algorithm starts trying to remove
	305	* entries at gc_thresh, and prevents new allocations as 2*gc_thresh
	306	* so lets set an initial xfrm gc_thresh value at the rt_max_size/2.
	307	* That will let us store an ipsec connection per route table entry,
	308	* and start cleaning when were 1/2 full
	309	*/
	310	xfrm4_dst_ops.gc_thresh = rt_max_size/2;
f816700a	311	#ifdef CONFIG_SYSCTL
a44a4a00 NH	312	sysctl_hdr = register_net_sysctl_table(&init_net, net_ipv4_ctl_path,
a44a4a00 NH	313	xfrm4_policy_table);
f816700a	314	#endif
1da177e4 LT	315	}
1da177e4 LT	316