Release 4.14 net/ipv6/xfrm6_policy.c

Directory: net/ipv6
// SPDX-License-Identifier: GPL-2.0
/*
 * xfrm6_policy.c: based on xfrm4_policy.c
 *
 * Authors:
 *      Mitsuru KANDA @USAGI
 *      Kazunori MIYAZAWA @USAGI
 *      Kunihiro Ishiguro <kunihiro@ipinfusion.com>
 *              IPv6 support
 *      YOSHIFUJI Hideaki
 *              Split up af-specific portion
 *
 */

#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <net/addrconf.h>
#include <net/dst.h>
#include <net/xfrm.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <net/l3mdev.h>
#if IS_ENABLED(CONFIG_IPV6_MIP6)
#include <net/mip6.h>
#endif



static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
					  const xfrm_address_t *saddr,
					  const xfrm_address_t *daddr,
					  u32 mark)
{
	struct flowi6 fl6;
	struct dst_entry *dst;
	int err;

	memset(&fl6, 0, sizeof(fl6));
	fl6.flowi6_oif = l3mdev_master_ifindex_by_index(net, oif);
	fl6.flowi6_flags = FLOWI_FLAG_SKIP_NH_OIF;
	fl6.flowi6_mark = mark;
	memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr));
	if (saddr)
		memcpy(&fl6.saddr, saddr, sizeof(fl6.saddr));

	dst = ip6_route_output(net, NULL, &fl6);

	err = dst->error;
	if (dst->error) {
		dst_release(dst);
		dst = ERR_PTR(err);
	}

	return dst;
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 65 40.88% 1 8.33%
David S. Miller 27 16.98% 2 16.67%
David Ahern 20 12.58% 3 25.00%
Ville Nuorvala 17 10.69% 1 8.33%
Hideaki Yoshifuji / 吉藤英明 13 8.18% 1 8.33%
Lorenzo Colitti 9 5.66% 1 8.33%
Alexey Dobriyan 6 3.77% 1 8.33%
Daniel Lezcano 1 0.63% 1 8.33%
Patrick McHardy 1 0.63% 1 8.33%
Total 159 100.00% 12 100.00%



static int xfrm6_get_saddr(struct net *net, int oif,
			   xfrm_address_t *saddr, xfrm_address_t *daddr,
			   u32 mark)
{
	struct dst_entry *dst;
	struct net_device *dev;

	dst = xfrm6_dst_lookup(net, 0, oif, NULL, daddr, mark);
	if (IS_ERR(dst))
		return -EHOSTUNREACH;

	dev = ip6_dst_idev(dst)->dev;
	ipv6_dev_get_saddr(dev_net(dev), dev, &daddr->in6, 0, &saddr->in6);
	dst_release(dst);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 44 43.14% 1 10.00%
Herbert Xu 17 16.67% 1 10.00%
Brian Haley 16 15.69% 1 10.00%
Alexey Dobriyan 7 6.86% 2 20.00%
Hideaki Yoshifuji / 吉藤英明 6 5.88% 2 20.00%
Lorenzo Colitti 5 4.90% 1 10.00%
David Ahern 5 4.90% 1 10.00%
Jiri Benc 2 1.96% 1 10.00%
Total 102 100.00% 10 100.00%



static int xfrm6_get_tos(const struct flowi *fl)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 13 86.67% 1 33.33%
Hideaki Yoshifuji / 吉藤英明 1 6.67% 1 33.33%
David S. Miller 1 6.67% 1 33.33%
Total 15 100.00% 3 100.00%



static int xfrm6_init_path(struct xfrm_dst *path, struct dst_entry *dst,
			   int nfheader_len)
{
	if (dst->ops->family == AF_INET6) {
		struct rt6_info *rt = (struct rt6_info *)dst;
		path->path_cookie = rt6_get_cookie(rt);
	}

	path->u.rt6.rt6i_nfheader_len = nfheader_len;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Masahide Nakamura 62 95.38% 1 50.00%
Martin KaFai Lau 3 4.62% 1 50.00%
Total 65 100.00% 2 100.00%



static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
			  const struct flowi *fl)
{
	struct rt6_info *rt = (struct rt6_info *)xdst->route;

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

	xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
	if (!xdst->u.rt6.rt6i_idev) {
		dev_put(dev);
		return -ENODEV;
	}

	/* Sheit... I remember I did this right. Apparently,
         * it was magically lost, so this code needs audit */
	xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST |
						   RTF_LOCAL);
	xdst->u.rt6.rt6i_metric = rt->rt6i_metric;
	xdst->u.rt6.rt6i_node = rt->rt6i_node;
	xdst->route_cookie = rt6_get_cookie(rt);
	xdst->u.rt6.rt6i_gateway = rt->rt6i_gateway;
	xdst->u.rt6.rt6i_dst = rt->rt6i_dst;
	xdst->u.rt6.rt6i_src = rt->rt6i_src;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 71 40.11% 2 18.18%
Herbert Xu 69 38.98% 4 36.36%
Tom Lendacky 20 11.30% 1 9.09%
Américo Wang 7 3.95% 1 9.09%
Masahide Nakamura 6 3.39% 1 9.09%
Martin KaFai Lau 3 1.69% 1 9.09%
David S. Miller 1 0.56% 1 9.09%
Total 177 100.00% 11 100.00%


static inline void

_decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse)
{
	struct flowi6 *fl6 = &fl->u.ip6;
	int onlyproto = 0;
	const struct ipv6hdr *hdr = ipv6_hdr(skb);
	u16 offset = sizeof(*hdr);
	struct ipv6_opt_hdr *exthdr;
	const unsigned char *nh = skb_network_header(skb);
	u16 nhoff = IP6CB(skb)->nhoff;
	int oif = 0;
	u8 nexthdr;

	if (!nhoff)
		nhoff = offsetof(struct ipv6hdr, nexthdr);

	nexthdr = nh[nhoff];

	if (skb_dst(skb))
		oif = skb_dst(skb)->dev->ifindex;

	memset(fl6, 0, sizeof(struct flowi6));
	fl6->flowi6_mark = skb->mark;
	fl6->flowi6_oif = reverse ? skb->skb_iif : oif;

	fl6->daddr = reverse ? hdr->saddr : hdr->daddr;
	fl6->saddr = reverse ? hdr->daddr : hdr->saddr;

	while (nh + offset + 1 < skb->data ||
	       pskb_may_pull(skb, nh + offset + 1 - skb->data)) {
		nh = skb_network_header(skb);
		exthdr = (struct ipv6_opt_hdr *)(nh + offset);

		switch (nexthdr) {
		case NEXTHDR_FRAGMENT:
			onlyproto = 1;
		case NEXTHDR_ROUTING:
		case NEXTHDR_HOP:
		case NEXTHDR_DEST:
			offset += ipv6_optlen(exthdr);
			nexthdr = exthdr->nexthdr;
			exthdr = (struct ipv6_opt_hdr *)(nh + offset);
			break;

		case IPPROTO_UDP:
		case IPPROTO_UDPLITE:
		case IPPROTO_TCP:
		case IPPROTO_SCTP:
		case IPPROTO_DCCP:
			if (!onlyproto && (nh + offset + 4 < skb->data ||
			     pskb_may_pull(skb, nh + offset + 4 - skb->data))) {
				__be16 *ports;

				nh = skb_network_header(skb);
				ports = (__be16 *)(nh + offset);
				fl6->fl6_sport = ports[!!reverse];
				fl6->fl6_dport = ports[!reverse];
			}
			fl6->flowi6_proto = nexthdr;
			return;

		case IPPROTO_ICMPV6:
			if (!onlyproto && (nh + offset + 2 < skb->data ||
			    pskb_may_pull(skb, nh + offset + 2 - skb->data))) {
				u8 *icmp;

				nh = skb_network_header(skb);
				icmp = (u8 *)(nh + offset);
				fl6->fl6_icmp_type = icmp[0];
				fl6->fl6_icmp_code = icmp[1];
			}
			fl6->flowi6_proto = nexthdr;
			return;

#if IS_ENABLED(CONFIG_IPV6_MIP6)
		case IPPROTO_MH:
			offset += ipv6_optlen(exthdr);
			if (!onlyproto && (nh + offset + 3 < skb->data ||
			    pskb_may_pull(skb, nh + offset + 3 - skb->data))) {
				struct ip6_mh *mh;

				nh = skb_network_header(skb);
				mh = (struct ip6_mh *)(nh + offset);
				fl6->fl6_mh_type = mh->ip6mh_type;
			}
			fl6->flowi6_proto = nexthdr;
			return;
#endif

		/* XXX Why are there these headers? */
		case IPPROTO_AH:
		case IPPROTO_ESP:
		case IPPROTO_COMP:
		default:
			fl6->fl6_ipsec_spi = 0;
			fl6->flowi6_proto = nexthdr;
			return;
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 180 30.46% 3 9.38%
Masahide Nakamura 101 17.09% 3 9.38%
Steffen Klassert 63 10.66% 4 12.50%
David S. Miller 48 8.12% 3 9.38%
Li RongQing 44 7.45% 1 3.12%
Herbert Xu 31 5.25% 2 6.25%
Mathias Krause 24 4.06% 1 3.12%
Wei Yongjun 22 3.72% 1 3.12%
Nicolas Dichtel 21 3.55% 1 3.12%
Arnaldo Carvalho de Melo 21 3.55% 2 6.25%
David Ahern 8 1.35% 2 6.25%
Hajime Tazaki 7 1.18% 1 3.12%
Peter Kosyh 6 1.02% 1 3.12%
James Morris 3 0.51% 1 3.12%
Gerrit Renker 3 0.51% 1 3.12%
Patrick McHardy 3 0.51% 1 3.12%
Al Viro 2 0.34% 1 3.12%
Alexey Dobriyan 2 0.34% 1 3.12%
Eric Dumazet 1 0.17% 1 3.12%
Américo Wang 1 0.17% 1 3.12%
Total 591 100.00% 32 100.00%



static void xfrm6_update_pmtu(struct dst_entry *dst, struct sock *sk,
			      struct sk_buff *skb, u32 mtu)
{
	struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
	struct dst_entry *path = xdst->route;

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

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 32 53.33% 1 33.33%
David S. Miller 14 23.33% 1 33.33%
Herbert Xu 14 23.33% 1 33.33%
Total 60 100.00% 3 100.00%



static void xfrm6_redirect(struct dst_entry *dst, struct sock *sk,
			   struct sk_buff *skb)
{
	struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
	struct dst_entry *path = xdst->route;

	path->ops->redirect(path, sk, skb);
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 55 100.00% 2 100.00%
Total 55 100.00% 2 100.00%



static void xfrm6_dst_destroy(struct dst_entry *dst)
{
	struct xfrm_dst *xdst = (struct xfrm_dst *)dst;

	if (likely(xdst->u.rt6.rt6i_idev))
		in6_dev_put(xdst->u.rt6.rt6i_idev);
	dst_destroy_metrics_generic(dst);
	xfrm_dst_destroy(xdst);
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 52 91.23% 1 50.00%
David S. Miller 5 8.77% 1 50.00%
Total 57 100.00% 2 100.00%



static void xfrm6_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.rt6.rt6i_idev->dev == dev) {
		struct inet6_dev *loopback_idev =
			in6_dev_get(dev_net(dev)->loopback_dev);
		BUG_ON(!loopback_idev);

		do {
			in6_dev_put(xdst->u.rt6.rt6i_idev);
			xdst->u.rt6.rt6i_idev = loopback_idev;
			in6_dev_hold(loopback_idev);
			xdst = (struct xfrm_dst *)xdst->u.dst.child;
		} while (xdst->u.dst.xfrm);

		__in6_dev_put(loopback_idev);
	}

	xfrm_dst_ifdown(dst, dev);
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 138 96.50% 1 33.33%
Hideaki Yoshifuji / 吉藤英明 3 2.10% 1 33.33%
Denis V. Lunev 2 1.40% 1 33.33%
Total 143 100.00% 3 100.00%


static struct dst_ops xfrm6_dst_ops_template = {
	.family =		AF_INET6,
	.update_pmtu =		xfrm6_update_pmtu,
	.redirect =		xfrm6_redirect,
	.cow_metrics =		dst_cow_metrics_generic,
	.destroy =		xfrm6_dst_destroy,
	.ifdown =		xfrm6_dst_ifdown,
	.local_out =		__ip6_local_out,
	.gc_thresh =		32768,
};


static const struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
	.dst_ops =		&xfrm6_dst_ops_template,
	.dst_lookup =		xfrm6_dst_lookup,
	.get_saddr =		xfrm6_get_saddr,
	.decode_session =	_decode_session6,
	.get_tos =		xfrm6_get_tos,
	.init_path =		xfrm6_init_path,
	.fill_dst =		xfrm6_fill_dst,
	.blackhole_route =	ip6_blackhole_route,
};



static int __init xfrm6_policy_init(void)
{
	return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo, AF_INET6);
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 12 66.67% 1 25.00%
Daniel Lezcano 3 16.67% 1 25.00%
Florian Westphal 2 11.11% 1 25.00%
Patrick McHardy 1 5.56% 1 25.00%
Total 18 100.00% 4 100.00%



static void xfrm6_policy_fini(void)
{
	xfrm_policy_unregister_afinfo(&xfrm6_policy_afinfo);
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 13 92.86% 1 50.00%
Patrick McHardy 1 7.14% 1 50.00%
Total 14 100.00% 2 100.00%

#ifdef CONFIG_SYSCTL

static struct ctl_table xfrm6_policy_table[] = {
	{
		.procname       = "xfrm6_gc_thresh",
		.data		= &init_net.xfrm.xfrm6_dst_ops.gc_thresh,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler   = proc_dointvec,
        },
	{ }
};



static int __net_init xfrm6_net_sysctl_init(struct net *net)
{
	struct ctl_table *table;
	struct ctl_table_header *hdr;

	table = xfrm6_policy_table;
	if (!net_eq(net, &init_net)) {
		table = kmemdup(table, sizeof(xfrm6_policy_table), GFP_KERNEL);
		if (!table)
			goto err_alloc;

		table[0].data = &net->xfrm.xfrm6_dst_ops.gc_thresh;
	}

	hdr = register_net_sysctl(net, "net/ipv6", table);
	if (!hdr)
		goto err_reg;

	net->ipv6.sysctl.xfrm6_hdr = hdr;
	return 0;

err_reg:
	if (!net_eq(net, &init_net))
		kfree(table);
err_alloc:
	return -ENOMEM;
}

Contributors
Person Tokens Prop Commits CommitProp
Michal Kubeček 128 96.24% 1 33.33%
Neil Horman 4 3.01% 1 33.33%
Dan Streetman 1 0.75% 1 33.33%
Total 133 100.00% 3 100.00%



static void __net_exit xfrm6_net_sysctl_exit(struct net *net)
{
	struct ctl_table *table;

	if (!net->ipv6.sysctl.xfrm6_hdr)
		return;

	table = net->ipv6.sysctl.xfrm6_hdr->ctl_table_arg;
	unregister_net_sysctl_table(net->ipv6.sysctl.xfrm6_hdr);
	if (!net_eq(net, &init_net))
		kfree(table);
}
Contributors
Person Tokens Prop Commits CommitProp
Michal Kubeček 66 97.06% 1 33.33%
Dan Streetman 1 1.47% 1 33.33%
Ian Morris 1 1.47% 1 33.33%
Total 68 100.00% 3 100.00%

#else /* CONFIG_SYSCTL */


static inline int xfrm6_net_sysctl_init(struct net *net)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dan Streetman 14 93.33% 1 50.00%
Arnd Bergmann 1 6.67% 1 50.00%
Total 15 100.00% 2 100.00%



static inline void xfrm6_net_sysctl_exit(struct net *net)
{
}
Contributors
Person Tokens Prop Commits CommitProp
Dan Streetman 10 90.91% 1 50.00%
Arnd Bergmann 1 9.09% 1 50.00%
Total 11 100.00% 2 100.00%

#endif



static int __net_init xfrm6_net_init(struct net *net)
{
	int ret;

	memcpy(&net->xfrm.xfrm6_dst_ops, &xfrm6_dst_ops_template,
	       sizeof(xfrm6_dst_ops_template));
	ret = dst_entries_init(&net->xfrm.xfrm6_dst_ops);
	if (ret)
		return ret;

	ret = xfrm6_net_sysctl_init(net);
	if (ret)
		dst_entries_destroy(&net->xfrm.xfrm6_dst_ops);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dan Streetman 76 100.00% 1 100.00%
Total 76 100.00% 1 100.00%



static void __net_exit xfrm6_net_exit(struct net *net)
{
	xfrm6_net_sysctl_exit(net);
	dst_entries_destroy(&net->xfrm.xfrm6_dst_ops);
}

Contributors
Person Tokens Prop Commits CommitProp
Dan Streetman 27 100.00% 1 100.00%
Total 27 100.00% 1 100.00%


static struct pernet_operations xfrm6_net_ops = {
	.init	= xfrm6_net_init,
	.exit	= xfrm6_net_exit,
};



int __init xfrm6_init(void)
{
	int ret;

	ret = xfrm6_policy_init();
	if (ret)
		goto out;
	ret = xfrm6_state_init();
	if (ret)
		goto out_policy;

	ret = xfrm6_protocol_init();
	if (ret)
		goto out_state;

	register_pernet_subsys(&xfrm6_net_ops);
out:
	return ret;
out_state:
	xfrm6_state_fini();
out_policy:
	xfrm6_policy_fini();
	goto out;
}

Contributors
Person Tokens Prop Commits CommitProp
Daniel Lezcano 35 49.30% 1 20.00%
Steffen Klassert 17 23.94% 1 20.00%
Hideaki Yoshifuji / 吉藤英明 13 18.31% 1 20.00%
Neil Horman 4 5.63% 1 20.00%
Michal Kubeček 2 2.82% 1 20.00%
Total 71 100.00% 5 100.00%



void xfrm6_fini(void)
{
	unregister_pernet_subsys(&xfrm6_net_ops);
	xfrm6_protocol_fini();
	xfrm6_policy_fini();
	xfrm6_state_fini();
}
Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 13 59.09% 1 25.00%
Michal Kubeček 3 13.64% 1 25.00%
Neil Horman 3 13.64% 1 25.00%
Steffen Klassert 3 13.64% 1 25.00%
Total 22 100.00% 4 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 438 20.96% 11 13.10%
Hideaki Yoshifuji / 吉藤英明 410 19.62% 7 8.33%
Michal Kubeček 215 10.29% 1 1.19%
Masahide Nakamura 184 8.80% 4 4.76%
David S. Miller 169 8.09% 11 13.10%
Dan Streetman 136 6.51% 1 1.19%
Steffen Klassert 83 3.97% 5 5.95%
Patrick McHardy 57 2.73% 3 3.57%
Neil Horman 55 2.63% 1 1.19%
Li RongQing 44 2.11% 1 1.19%
Daniel Lezcano 39 1.87% 2 2.38%
David Ahern 36 1.72% 6 7.14%
Mathias Krause 24 1.15% 1 1.19%
Wei Yongjun 22 1.05% 1 1.19%
Arnaldo Carvalho de Melo 21 1.00% 2 2.38%
Nicolas Dichtel 21 1.00% 1 1.19%
Tom Lendacky 20 0.96% 1 1.19%
Alexey Dobriyan 19 0.91% 4 4.76%
Ville Nuorvala 17 0.81% 1 1.19%
Brian Haley 16 0.77% 1 1.19%
Lorenzo Colitti 14 0.67% 1 1.19%
Américo Wang 9 0.43% 2 2.38%
Hajime Tazaki 7 0.33% 1 1.19%
Martin KaFai Lau 6 0.29% 1 1.19%
Peter Kosyh 6 0.29% 1 1.19%
Florian Westphal 4 0.19% 3 3.57%
Gerrit Renker 3 0.14% 1 1.19%
James Morris 3 0.14% 1 1.19%
Arnd Bergmann 2 0.10% 1 1.19%
Ian Morris 2 0.10% 2 2.38%
Denis V. Lunev 2 0.10% 1 1.19%
Jiri Benc 2 0.10% 1 1.19%
Al Viro 2 0.10% 1 1.19%
Greg Kroah-Hartman 1 0.05% 1 1.19%
Eric Dumazet 1 0.05% 1 1.19%
Total 2090 100.00% 84 100.00%
Directory: net/ipv6

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Herbert Xu	65	40.88%	1	8.33%
David S. Miller	27	16.98%	2	16.67%
David Ahern	20	12.58%	3	25.00%
Ville Nuorvala	17	10.69%	1	8.33%
Hideaki Yoshifuji / 吉藤英明	13	8.18%	1	8.33%
Lorenzo Colitti	9	5.66%	1	8.33%
Alexey Dobriyan	6	3.77%	1	8.33%
Daniel Lezcano	1	0.63%	1	8.33%
Patrick McHardy	1	0.63%	1	8.33%
Total	159	100.00%	12	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 net/ipv6/xfrm6_policy.c

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