Release 4.18 net/ipv6/ip6_gre.c

Directory: net/ipv6
/*
 *      GRE over IPv6 protocol decoder.
 *
 *      Authors: Dmitry Kozlov (xeb@mail.ru)
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 *
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/capability.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/in.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/in6.h>
#include <linux/inetdevice.h>
#include <linux/igmp.h>
#include <linux/netfilter_ipv4.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/hash.h>
#include <linux/if_tunnel.h>
#include <linux/ip6_tunnel.h>

#include <net/sock.h>
#include <net/ip.h>
#include <net/ip_tunnels.h>
#include <net/icmp.h>
#include <net/protocol.h>
#include <net/addrconf.h>
#include <net/arp.h>
#include <net/checksum.h>
#include <net/dsfield.h>
#include <net/inet_ecn.h>
#include <net/xfrm.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/rtnetlink.h>

#include <net/ipv6.h>
#include <net/ip6_fib.h>
#include <net/ip6_route.h>
#include <net/ip6_tunnel.h>
#include <net/gre.h>
#include <net/erspan.h>
#include <net/dst_metadata.h>



static bool log_ecn_error = true;
module_param(log_ecn_error, bool, 0644);
MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");


#define IP6_GRE_HASH_SIZE_SHIFT  5

#define IP6_GRE_HASH_SIZE (1 << IP6_GRE_HASH_SIZE_SHIFT)


static unsigned int ip6gre_net_id __read_mostly;

struct ip6gre_net {
	
struct ip6_tnl __rcu *tunnels[4][IP6_GRE_HASH_SIZE];

	
struct ip6_tnl __rcu *collect_md_tun;
	
struct ip6_tnl __rcu *collect_md_tun_erspan;
	
struct net_device *fb_tunnel_dev;
};


static struct rtnl_link_ops ip6gre_link_ops __read_mostly;

static struct rtnl_link_ops ip6gre_tap_ops __read_mostly;

static struct rtnl_link_ops ip6erspan_tap_ops __read_mostly;
static int ip6gre_tunnel_init(struct net_device *dev);
static void ip6gre_tunnel_setup(struct net_device *dev);
static void ip6gre_tunnel_link(struct ip6gre_net *ign, struct ip6_tnl *t);
static void ip6gre_tnl_link_config(struct ip6_tnl *t, int set_mtu);
static void ip6erspan_tnl_link_config(struct ip6_tnl *t, int set_mtu);

/* Tunnel hash table */

/*
   4 hash tables:

   3: (remote,local)
   2: (remote,*)
   1: (*,local)
   0: (*,*)

   We require exact key match i.e. if a key is present in packet
   it will match only tunnel with the same key; if it is not present,
   it will match only keyless tunnel.

   All keysless packets, if not matched configured keyless tunnels
   will match fallback tunnel.
 */


#define HASH_KEY(key) (((__force u32)key^((__force u32)key>>4))&(IP6_GRE_HASH_SIZE - 1))


static u32 HASH_ADDR(const struct in6_addr *addr)
{
	u32 hash = ipv6_addr_hash(addr);

	return hash_32(hash, IP6_GRE_HASH_SIZE_SHIFT);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 27 96.43% 1 50.00%
Jiri Kosina 1 3.57% 1 50.00%
Total 28 100.00% 2 100.00%


#define tunnels_r_l	tunnels[3]

#define tunnels_r	tunnels[2]

#define tunnels_l	tunnels[1]

#define tunnels_wc	tunnels[0]

/* Given src, dst and key, find appropriate for input tunnel. */



static struct ip6_tnl *ip6gre_tunnel_lookup(struct net_device *dev,
		const struct in6_addr *remote, const struct in6_addr *local,
		__be32 key, __be16 gre_proto)
{
	struct net *net = dev_net(dev);
	int link = dev->ifindex;
	unsigned int h0 = HASH_ADDR(remote);
	unsigned int h1 = HASH_KEY(key);
	struct ip6_tnl *t, *cand = NULL;
	struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);
	int dev_type = (gre_proto == htons(ETH_P_TEB) ||
			gre_proto == htons(ETH_P_ERSPAN) ||
			gre_proto == htons(ETH_P_ERSPAN2)) ?
		       ARPHRD_ETHER : ARPHRD_IP6GRE;
	int score, cand_score = 4;

	for_each_ip_tunnel_rcu(t, ign->tunnels_r_l[h0 ^ h1]) {
		if (!ipv6_addr_equal(local, &t->parms.laddr) ||
		    !ipv6_addr_equal(remote, &t->parms.raddr) ||
		    key != t->parms.i_key ||
		    !(t->dev->flags & IFF_UP))
			continue;

		if (t->dev->type != ARPHRD_IP6GRE &&
		    t->dev->type != dev_type)
			continue;

		score = 0;
		if (t->parms.link != link)
			score |= 1;
		if (t->dev->type != dev_type)
			score |= 2;
		if (score == 0)
			return t;

		if (score < cand_score) {
			cand = t;
			cand_score = score;
		}
	}

	for_each_ip_tunnel_rcu(t, ign->tunnels_r[h0 ^ h1]) {
		if (!ipv6_addr_equal(remote, &t->parms.raddr) ||
		    key != t->parms.i_key ||
		    !(t->dev->flags & IFF_UP))
			continue;

		if (t->dev->type != ARPHRD_IP6GRE &&
		    t->dev->type != dev_type)
			continue;

		score = 0;
		if (t->parms.link != link)
			score |= 1;
		if (t->dev->type != dev_type)
			score |= 2;
		if (score == 0)
			return t;

		if (score < cand_score) {
			cand = t;
			cand_score = score;
		}
	}

	for_each_ip_tunnel_rcu(t, ign->tunnels_l[h1]) {
		if ((!ipv6_addr_equal(local, &t->parms.laddr) &&
			  (!ipv6_addr_equal(local, &t->parms.raddr) ||
				 !ipv6_addr_is_multicast(local))) ||
		    key != t->parms.i_key ||
		    !(t->dev->flags & IFF_UP))
			continue;

		if (t->dev->type != ARPHRD_IP6GRE &&
		    t->dev->type != dev_type)
			continue;

		score = 0;
		if (t->parms.link != link)
			score |= 1;
		if (t->dev->type != dev_type)
			score |= 2;
		if (score == 0)
			return t;

		if (score < cand_score) {
			cand = t;
			cand_score = score;
		}
	}

	for_each_ip_tunnel_rcu(t, ign->tunnels_wc[h1]) {
		if (t->parms.i_key != key ||
		    !(t->dev->flags & IFF_UP))
			continue;

		if (t->dev->type != ARPHRD_IP6GRE &&
		    t->dev->type != dev_type)
			continue;

		score = 0;
		if (t->parms.link != link)
			score |= 1;
		if (t->dev->type != dev_type)
			score |= 2;
		if (score == 0)
			return t;

		if (score < cand_score) {
			cand = t;
			cand_score = score;
		}
	}

	if (cand)
		return cand;

	if (gre_proto == htons(ETH_P_ERSPAN) ||
	    gre_proto == htons(ETH_P_ERSPAN2))
		t = rcu_dereference(ign->collect_md_tun_erspan);
	else
		t = rcu_dereference(ign->collect_md_tun);

	if (t && t->dev->flags & IFF_UP)
		return t;

	dev = ign->fb_tunnel_dev;
	if (dev && dev->flags & IFF_UP)
		return netdev_priv(dev);

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 632 89.52% 1 14.29%
William Tu 64 9.07% 4 57.14%
Américo Wang 8 1.13% 1 14.29%
Eric Dumazet 2 0.28% 1 14.29%
Total 706 100.00% 7 100.00%



static struct ip6_tnl __rcu **__ip6gre_bucket(struct ip6gre_net *ign,
		const struct __ip6_tnl_parm *p)
{
	const struct in6_addr *remote = &p->raddr;
	const struct in6_addr *local = &p->laddr;
	unsigned int h = HASH_KEY(p->i_key);
	int prio = 0;

	if (!ipv6_addr_any(local))
		prio |= 1;
	if (!ipv6_addr_any(remote) && !ipv6_addr_is_multicast(remote)) {
		prio |= 2;
		h ^= HASH_ADDR(remote);
	}

	return &ign->tunnels[prio][h];
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 110 100.00% 1 100.00%
Total 110 100.00% 1 100.00%



static void ip6gre_tunnel_link_md(struct ip6gre_net *ign, struct ip6_tnl *t)
{
	if (t->parms.collect_md)
		rcu_assign_pointer(ign->collect_md_tun, t);
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static void ip6erspan_tunnel_link_md(struct ip6gre_net *ign, struct ip6_tnl *t)
{
	if (t->parms.collect_md)
		rcu_assign_pointer(ign->collect_md_tun_erspan, t);
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static void ip6gre_tunnel_unlink_md(struct ip6gre_net *ign, struct ip6_tnl *t)
{
	if (t->parms.collect_md)
		rcu_assign_pointer(ign->collect_md_tun, NULL);
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static void ip6erspan_tunnel_unlink_md(struct ip6gre_net *ign,
				       struct ip6_tnl *t)
{
	if (t->parms.collect_md)
		rcu_assign_pointer(ign->collect_md_tun_erspan, NULL);
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static inline struct ip6_tnl __rcu **ip6gre_bucket(struct ip6gre_net *ign,
		const struct ip6_tnl *t)
{
	return __ip6gre_bucket(ign, &t->parms);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static void ip6gre_tunnel_link(struct ip6gre_net *ign, struct ip6_tnl *t)
{
	struct ip6_tnl __rcu **tp = ip6gre_bucket(ign, t);

	rcu_assign_pointer(t->next, rtnl_dereference(*tp));
	rcu_assign_pointer(*tp, t);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 51 100.00% 1 100.00%
Total 51 100.00% 1 100.00%



static void ip6gre_tunnel_unlink(struct ip6gre_net *ign, struct ip6_tnl *t)
{
	struct ip6_tnl __rcu **tp;
	struct ip6_tnl *iter;

	for (tp = ip6gre_bucket(ign, t);
	     (iter = rtnl_dereference(*tp)) != NULL;
	     tp = &iter->next) {
		if (t == iter) {
			rcu_assign_pointer(*tp, t->next);
			break;
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 79 100.00% 1 100.00%
Total 79 100.00% 1 100.00%



static struct ip6_tnl *ip6gre_tunnel_find(struct net *net,
					   const struct __ip6_tnl_parm *parms,
					   int type)
{
	const struct in6_addr *remote = &parms->raddr;
	const struct in6_addr *local = &parms->laddr;
	__be32 key = parms->i_key;
	int link = parms->link;
	struct ip6_tnl *t;
	struct ip6_tnl __rcu **tp;
	struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);

	for (tp = __ip6gre_bucket(ign, parms);
	     (t = rtnl_dereference(*tp)) != NULL;
	     tp = &t->next)
		if (ipv6_addr_equal(local, &t->parms.laddr) &&
		    ipv6_addr_equal(remote, &t->parms.raddr) &&
		    key == t->parms.i_key &&
		    link == t->parms.link &&
		    type == t->dev->type)
			break;

	return t;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 166 100.00% 1 100.00%
Total 166 100.00% 1 100.00%



static struct ip6_tnl *ip6gre_tunnel_locate(struct net *net,
		const struct __ip6_tnl_parm *parms, int create)
{
	struct ip6_tnl *t, *nt;
	struct net_device *dev;
	char name[IFNAMSIZ];
	struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);

	t = ip6gre_tunnel_find(net, parms, ARPHRD_IP6GRE);
	if (t && create)
		return NULL;
	if (t || !create)
		return t;

	if (parms->name[0]) {
		if (!dev_valid_name(parms->name))
			return NULL;
		strlcpy(name, parms->name, IFNAMSIZ);
	} else {
		strcpy(name, "ip6gre%d");
	}
	dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN,
			   ip6gre_tunnel_setup);
	if (!dev)
		return NULL;

	dev_net_set(dev, net);

	nt = netdev_priv(dev);
	nt->parms = *parms;
	dev->rtnl_link_ops = &ip6gre_link_ops;

	nt->dev = dev;
	nt->net = dev_net(dev);

	if (register_netdevice(dev) < 0)
		goto failed_free;

	ip6gre_tnl_link_config(nt, 1);

	/* Can use a lockless transmit, unless we generate output sequences */
	if (!(nt->parms.o_flags & TUNNEL_SEQ))
		dev->features |= NETIF_F_LLTX;

	dev_hold(dev);
	ip6gre_tunnel_link(ign, nt);
	return nt;

failed_free:
	free_netdev(dev);
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 215 82.69% 1 14.29%
Eric Dumazet 17 6.54% 1 14.29%
Nicolas Dichtel 9 3.46% 1 14.29%
Steffen Klassert 9 3.46% 1 14.29%
Alexey Kodanev 7 2.69% 1 14.29%
Tom Gundersen 2 0.77% 1 14.29%
Tom Herbert 1 0.38% 1 14.29%
Total 260 100.00% 7 100.00%



static void ip6erspan_tunnel_uninit(struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);
	struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id);

	ip6erspan_tunnel_unlink_md(ign, t);
	ip6gre_tunnel_unlink(ign, t);
	dst_cache_reset(&t->dst_cache);
	dev_put(dev);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 40 64.52% 1 20.00%
William Tu 8 12.90% 1 20.00%
Nicolas Dichtel 6 9.68% 1 20.00%
Paolo Abeni 4 6.45% 1 20.00%
Huaibin Wang 4 6.45% 1 20.00%
Total 62 100.00% 5 100.00%



static void ip6gre_tunnel_uninit(struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);
	struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id);

	ip6gre_tunnel_unlink_md(ign, t);
	ip6gre_tunnel_unlink(ign, t);
	dst_cache_reset(&t->dst_cache);
	dev_put(dev);
}


Contributors
Person Tokens Prop Commits CommitProp
William Tu 46 74.19% 1 25.00%
Dmitry Kozlov 8 12.90% 1 25.00%
Xin Long 7 11.29% 1 25.00%
Eric Dumazet 1 1.61% 1 25.00%
Total 62 100.00% 4 100.00%



static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
		       u8 type, u8 code, int offset, __be32 info)
{
	struct net *net = dev_net(skb->dev);
	const struct gre_base_hdr *greh;
	const struct ipv6hdr *ipv6h;
	int grehlen = sizeof(*greh);
	struct ip6_tnl *t;
	int key_off = 0;
	__be16 flags;
	__be32 key;

	if (!pskb_may_pull(skb, offset + grehlen))
		return;
	greh = (const struct gre_base_hdr *)(skb->data + offset);
	flags = greh->flags;
	if (flags & (GRE_VERSION | GRE_ROUTING))
		return;
	if (flags & GRE_CSUM)
		grehlen += 4;
	if (flags & GRE_KEY) {
		key_off = grehlen + offset;
		grehlen += 4;
	}

	if (!pskb_may_pull(skb, offset + grehlen))
		return;
	ipv6h = (const struct ipv6hdr *)skb->data;
	greh = (const struct gre_base_hdr *)(skb->data + offset);
	key = key_off ? *(__be32 *)(skb->data + key_off) : 0;

	t = ip6gre_tunnel_lookup(skb->dev, &ipv6h->daddr, &ipv6h->saddr,
				 key, greh->protocol);
	if (!t)
		return;

	switch (type) {
		struct ipv6_tlv_tnl_enc_lim *tel;
		__u32 teli;
	case ICMPV6_DEST_UNREACH:
		net_dbg_ratelimited("%s: Path to destination invalid or inactive!\n",
				    t->parms.name);
		if (code != ICMPV6_PORT_UNREACH)
			break;
		return;
	case ICMPV6_TIME_EXCEED:
		if (code == ICMPV6_EXC_HOPLIMIT) {
			net_dbg_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n",
					    t->parms.name);
			break;
		}
		return;
	case ICMPV6_PARAMPROB:
		teli = 0;
		if (code == ICMPV6_HDR_FIELD)
			teli = ip6_tnl_parse_tlv_enc_lim(skb, skb->data);

		if (teli && teli == be32_to_cpu(info) - 2) {
			tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli];
			if (tel->encap_limit == 0) {
				net_dbg_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n",
						    t->parms.name);
			}
		} else {
			net_dbg_ratelimited("%s: Recipient unable to parse tunneled packet!\n",
					    t->parms.name);
		}
		return;
	case ICMPV6_PKT_TOOBIG:
		ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL));
		return;
	case NDISC_REDIRECT:
		ip6_redirect(skb, net, skb->dev->ifindex, 0,
			     sock_net_uid(net, NULL));
		return;
	}

	if (time_before(jiffies, t->err_time + IP6TUNNEL_ERR_TIMEO))
		t->err_count++;
	else
		t->err_count = 1;
	t->err_time = jiffies;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 233 49.26% 1 8.33%
Eric Dumazet 115 24.31% 2 16.67%
Xin Long 60 12.68% 3 25.00%
William Tu 33 6.98% 1 8.33%
Tom Herbert 21 4.44% 1 8.33%
Sabrina Dubroca 5 1.06% 1 8.33%
Matt Bennett 4 0.85% 1 8.33%
Ian Morris 1 0.21% 1 8.33%
Stephen Hemminger 1 0.21% 1 8.33%
Total 473 100.00% 12 100.00%



static int ip6gre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi)
{
	const struct ipv6hdr *ipv6h;
	struct ip6_tnl *tunnel;

	ipv6h = ipv6_hdr(skb);
	tunnel = ip6gre_tunnel_lookup(skb->dev,
				      &ipv6h->saddr, &ipv6h->daddr, tpi->key,
				      tpi->proto);
	if (tunnel) {
		if (tunnel->parms.collect_md) {
			struct metadata_dst *tun_dst;
			__be64 tun_id;
			__be16 flags;

			flags = tpi->flags;
			tun_id = key32_to_tunnel_id(tpi->key);

			tun_dst = ipv6_tun_rx_dst(skb, flags, tun_id, 0);
			if (!tun_dst)
				return PACKET_REJECT;

			ip6_tnl_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);
		} else {
			ip6_tnl_rcv(tunnel, skb, tpi, NULL, log_ecn_error);
		}

		return PACKET_RCVD;
	}

	return PACKET_REJECT;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 73 45.62% 1 16.67%
Tom Herbert 61 38.12% 1 16.67%
Dmitry Kozlov 14 8.75% 1 16.67%
Stephen Hemminger 9 5.62% 1 16.67%
Nicolas Dichtel 2 1.25% 1 16.67%
Alexey Kodanev 1 0.62% 1 16.67%
Total 160 100.00% 6 100.00%



static int ip6erspan_rcv(struct sk_buff *skb, int gre_hdr_len,
			 struct tnl_ptk_info *tpi)
{
	struct erspan_base_hdr *ershdr;
	struct erspan_metadata *pkt_md;
	const struct ipv6hdr *ipv6h;
	struct erspan_md2 *md2;
	struct ip6_tnl *tunnel;
	u8 ver;

	if (unlikely(!pskb_may_pull(skb, sizeof(*ershdr))))
		return PACKET_REJECT;

	ipv6h = ipv6_hdr(skb);
	ershdr = (struct erspan_base_hdr *)skb->data;
	ver = ershdr->ver;
	tpi->key = cpu_to_be32(get_session_id(ershdr));

	tunnel = ip6gre_tunnel_lookup(skb->dev,
				      &ipv6h->saddr, &ipv6h->daddr, tpi->key,
				      tpi->proto);
	if (tunnel) {
		int len = erspan_hdr_len(ver);

		if (unlikely(!pskb_may_pull(skb, len)))
			return PACKET_REJECT;

		ershdr = (struct erspan_base_hdr *)skb->data;
		pkt_md = (struct erspan_metadata *)(ershdr + 1);

		if (__iptunnel_pull_header(skb, len,
					   htons(ETH_P_TEB),
					   false, false) < 0)
			return PACKET_REJECT;

		if (tunnel->parms.collect_md) {
			struct metadata_dst *tun_dst;
			struct ip_tunnel_info *info;
			struct erspan_metadata *md;
			__be64 tun_id;
			__be16 flags;

			tpi->flags |= TUNNEL_KEY;
			flags = tpi->flags;
			tun_id = key32_to_tunnel_id(tpi->key);

			tun_dst = ipv6_tun_rx_dst(skb, flags, tun_id,
						  sizeof(*md));
			if (!tun_dst)
				return PACKET_REJECT;

			info = &tun_dst->u.tun_info;
			md = ip_tunnel_info_opts(info);
			md->version = ver;
			md2 = &md->u.md2;
			memcpy(md2, pkt_md, ver == 1 ? ERSPAN_V1_MDSIZE :
						       ERSPAN_V2_MDSIZE);
			info->key.tun_flags |= TUNNEL_ERSPAN_OPT;
			info->options_len = sizeof(*md);

			ip6_tnl_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);

		} else {
			ip6_tnl_rcv(tunnel, skb, tpi, NULL, log_ecn_error);
		}

		return PACKET_RCVD;
	}

	return PACKET_REJECT;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 366 95.31% 8 88.89%
Haishuang Yan 18 4.69% 1 11.11%
Total 384 100.00% 9 100.00%



static int gre_rcv(struct sk_buff *skb)
{
	struct tnl_ptk_info tpi;
	bool csum_err = false;
	int hdr_len;

	hdr_len = gre_parse_header(skb, &tpi, &csum_err, htons(ETH_P_IPV6), 0);
	if (hdr_len < 0)
		goto drop;

	if (iptunnel_pull_header(skb, hdr_len, tpi.proto, false))
		goto drop;

	if (unlikely(tpi.proto == htons(ETH_P_ERSPAN) ||
		     tpi.proto == htons(ETH_P_ERSPAN2))) {
		if (ip6erspan_rcv(skb, hdr_len, &tpi) == PACKET_RCVD)
			return 0;
		goto out;
	}

	if (ip6gre_rcv(skb, &tpi) == PACKET_RCVD)
		return 0;

out:
	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0);
drop:
	kfree_skb(skb);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Tom Herbert 51 33.33% 1 11.11%
William Tu 44 28.76% 2 22.22%
Dmitry Kozlov 29 18.95% 1 11.11%
Stephen Hemminger 13 8.50% 1 11.11%
Haishuang Yan 8 5.23% 2 22.22%
Jiri Benc 6 3.92% 1 11.11%
Eric Dumazet 2 1.31% 1 11.11%
Total 153 100.00% 9 100.00%



static int gre_handle_offloads(struct sk_buff *skb, bool csum)
{
	return iptunnel_handle_offloads(skb,
					csum ? SKB_GSO_GRE_CSUM : SKB_GSO_GRE);
}

Contributors
Person Tokens Prop Commits CommitProp
Alexander Duyck 14 53.85% 1 33.33%
Tom Herbert 11 42.31% 1 33.33%
Dmitry Kozlov 1 3.85% 1 33.33%
Total 26 100.00% 3 100.00%



static void prepare_ip6gre_xmit_ipv4(struct sk_buff *skb,
				     struct net_device *dev,
				     struct flowi6 *fl6, __u8 *dsfield,
				     int *encap_limit)
{
	const struct iphdr *iph = ip_hdr(skb);
	struct ip6_tnl *t = netdev_priv(dev);

	if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
		*encap_limit = t->parms.encap_limit;

	memcpy(fl6, &t->fl.u.ip6, sizeof(*fl6));

	if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
		*dsfield = ipv4_get_dsfield(iph);
	else
		*dsfield = ip6_tclass(t->parms.flowinfo);

	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
		fl6->flowi6_mark = skb->mark;
	else
		fl6->flowi6_mark = t->parms.fwmark;

	fl6->flowi6_uid = sock_net_uid(dev_net(dev), NULL);
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 166 100.00% 1 100.00%
Total 166 100.00% 1 100.00%



static int prepare_ip6gre_xmit_ipv6(struct sk_buff *skb,
				    struct net_device *dev,
				    struct flowi6 *fl6, __u8 *dsfield,
				    int *encap_limit)
{
	struct ipv6hdr *ipv6h = ipv6_hdr(skb);
	struct ip6_tnl *t = netdev_priv(dev);
	__u16 offset;

	offset = ip6_tnl_parse_tlv_enc_lim(skb, skb_network_header(skb));
	/* ip6_tnl_parse_tlv_enc_lim() might have reallocated skb->head */

	if (offset > 0) {
		struct ipv6_tlv_tnl_enc_lim *tel;

		tel = (struct ipv6_tlv_tnl_enc_lim *)&skb_network_header(skb)[offset];
		if (tel->encap_limit == 0) {
			icmpv6_send(skb, ICMPV6_PARAMPROB,
				    ICMPV6_HDR_FIELD, offset + 2);
			return -1;
		}
		*encap_limit = tel->encap_limit - 1;
	} else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) {
		*encap_limit = t->parms.encap_limit;
	}

	memcpy(fl6, &t->fl.u.ip6, sizeof(*fl6));

	if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
		*dsfield = ipv6_get_dsfield(ipv6h);
	else
		*dsfield = ip6_tclass(t->parms.flowinfo);

	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
		fl6->flowlabel |= ip6_flowlabel(ipv6h);

	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
		fl6->flowi6_mark = skb->mark;
	else
		fl6->flowi6_mark = t->parms.fwmark;

	fl6->flowi6_uid = sock_net_uid(dev_net(dev), NULL);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 271 100.00% 1 100.00%
Total 271 100.00% 1 100.00%



static netdev_tx_t __gre6_xmit(struct sk_buff *skb,
			       struct net_device *dev, __u8 dsfield,
			       struct flowi6 *fl6, int encap_limit,
			       __u32 *pmtu, __be16 proto)
{
	struct ip6_tnl *tunnel = netdev_priv(dev);
	__be16 protocol;

	if (dev->type == ARPHRD_ETHER)
		IPCB(skb)->flags = 0;

	if (dev->header_ops && dev->type == ARPHRD_IP6GRE)
		fl6->daddr = ((struct ipv6hdr *)skb->data)->daddr;
	else
		fl6->daddr = tunnel->parms.raddr;

	if (skb_cow_head(skb, dev->needed_headroom ?: tunnel->hlen))
		return -ENOMEM;

	/* Push GRE header. */
	protocol = (dev->type == ARPHRD_ETHER) ? htons(ETH_P_TEB) : proto;

	if (tunnel->parms.collect_md) {
		struct ip_tunnel_info *tun_info;
		const struct ip_tunnel_key *key;
		__be16 flags;

		tun_info = skb_tunnel_info(skb);
		if (unlikely(!tun_info ||
			     !(tun_info->mode & IP_TUNNEL_INFO_TX) ||
			     ip_tunnel_info_af(tun_info) != AF_INET6))
			return -EINVAL;

		key = &tun_info->key;
		memset(fl6, 0, sizeof(*fl6));
		fl6->flowi6_proto = IPPROTO_GRE;
		fl6->daddr = key->u.ipv6.dst;
		fl6->flowlabel = key->label;
		fl6->flowi6_uid = sock_net_uid(dev_net(dev), NULL);

		dsfield = key->tos;
		flags = key->tun_flags &
			(TUNNEL_CSUM | TUNNEL_KEY | TUNNEL_SEQ);
		tunnel->tun_hlen = gre_calc_hlen(flags);

		gre_build_header(skb, tunnel->tun_hlen,
				 flags, protocol,
				 tunnel_id_to_key32(tun_info->key.tun_id),
				 (flags & TUNNEL_SEQ) ? htonl(tunnel->o_seqno++)
						      : 0);

	} else {
		if (tunnel->parms.o_flags & TUNNEL_SEQ)
			tunnel->o_seqno++;

		gre_build_header(skb, tunnel->tun_hlen, tunnel->parms.o_flags,
				 protocol, tunnel->parms.o_key,
				 htonl(tunnel->o_seqno));
	}

	return ip6_tnl_xmit(skb, dev, dsfield, fl6, encap_limit, pmtu,
			    NEXTHDR_GRE);
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 203 51.52% 2 18.18%
Dmitry Kozlov 115 29.19% 1 9.09%
Tom Herbert 32 8.12% 3 27.27%
Petr Machata 20 5.08% 1 9.09%
Xin Long 19 4.82% 1 9.09%
Nicolas Dichtel 3 0.76% 1 9.09%
Américo Wang 1 0.25% 1 9.09%
Colin Ian King 1 0.25% 1 9.09%
Total 394 100.00% 11 100.00%



static inline int ip6gre_xmit_ipv4(struct sk_buff *skb, struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);
	int encap_limit = -1;
	struct flowi6 fl6;
	__u8 dsfield = 0;
	__u32 mtu;
	int err;

	memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));

	if (!t->parms.collect_md)
		prepare_ip6gre_xmit_ipv4(skb, dev, &fl6,
					 &dsfield, &encap_limit);

	err = gre_handle_offloads(skb, !!(t->parms.o_flags & TUNNEL_CSUM));
	if (err)
		return -1;

	err = __gre6_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu,
			  skb->protocol);
	if (err != 0) {
		/* XXX: send ICMP error even if DF is not set. */
		if (err == -EMSGSIZE)
			icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
				  htonl(mtu));
		return -1;
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 103 55.68% 1 14.29%
William Tu 34 18.38% 2 28.57%
Tom Herbert 32 17.30% 1 14.29%
Bernie Harris 10 5.41% 1 14.29%
Lorenzo Colitti 5 2.70% 1 14.29%
Craig Gallek 1 0.54% 1 14.29%
Total 185 100.00% 7 100.00%



static inline int ip6gre_xmit_ipv6(struct sk_buff *skb, struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);
	struct ipv6hdr *ipv6h = ipv6_hdr(skb);
	int encap_limit = -1;
	struct flowi6 fl6;
	__u8 dsfield = 0;
	__u32 mtu;
	int err;

	if (ipv6_addr_equal(&t->parms.raddr, &ipv6h->saddr))
		return -1;

	if (!t->parms.collect_md &&
	    prepare_ip6gre_xmit_ipv6(skb, dev, &fl6, &dsfield, &encap_limit))
		return -1;

	if (gre_handle_offloads(skb, !!(t->parms.o_flags & TUNNEL_CSUM)))
		return -1;

	err = __gre6_xmit(skb, dev, dsfield, &fl6, encap_limit,
			  &mtu, skb->protocol);
	if (err != 0) {
		if (err == -EMSGSIZE)
			icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
		return -1;
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 140 74.87% 1 16.67%
Tom Herbert 28 14.97% 1 16.67%
William Tu 17 9.09% 2 33.33%
Florent Fourcot 1 0.53% 1 16.67%
Peter Dawson 1 0.53% 1 16.67%
Total 187 100.00% 6 100.00%

/**
 * ip6gre_tnl_addr_conflict - compare packet addresses to tunnel's own
 *   @t: the outgoing tunnel device
 *   @hdr: IPv6 header from the incoming packet
 *
 * Description:
 *   Avoid trivial tunneling loop by checking that tunnel exit-point
 *   doesn't match source of incoming packet.
 *
 * Return:
 *   1 if conflict,
 *   0 else
 **/



static inline bool ip6gre_tnl_addr_conflict(const struct ip6_tnl *t,
	const struct ipv6hdr *hdr)
{
	return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%



static int ip6gre_xmit_other(struct sk_buff *skb, struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);
	int encap_limit = -1;
	struct flowi6 fl6;
	__u32 mtu;
	int err;

	if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
		encap_limit = t->parms.encap_limit;

	if (!t->parms.collect_md)
		memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));

	err = gre_handle_offloads(skb, !!(t->parms.o_flags & TUNNEL_CSUM));
	if (err)
		return err;

	err = __gre6_xmit(skb, dev, 0, &fl6, encap_limit, &mtu, skb->protocol);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 104 72.22% 1 33.33%
Tom Herbert 31 21.53% 1 33.33%
William Tu 9 6.25% 1 33.33%
Total 144 100.00% 3 100.00%



static netdev_tx_t ip6gre_tunnel_xmit(struct sk_buff *skb,
	struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);
	struct net_device_stats *stats = &t->dev->stats;
	int ret;

	if (!ip6_tnl_xmit_ctl(t, &t->parms.laddr, &t->parms.raddr))
		goto tx_err;

	switch (skb->protocol) {
	case htons(ETH_P_IP):
		ret = ip6gre_xmit_ipv4(skb, dev);
		break;
	case htons(ETH_P_IPV6):
		ret = ip6gre_xmit_ipv6(skb, dev);
		break;
	default:
		ret = ip6gre_xmit_other(skb, dev);
		break;
	}

	if (ret < 0)
		goto tx_err;

	return NETDEV_TX_OK;

tx_err:
	stats->tx_errors++;
	stats->tx_dropped++;
	kfree_skb(skb);
	return NETDEV_TX_OK;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 132 88.59% 1 33.33%
Steffen Klassert 14 9.40% 1 33.33%
Tommi Rantala 3 2.01% 1 33.33%
Total 149 100.00% 3 100.00%



static netdev_tx_t ip6erspan_tunnel_xmit(struct sk_buff *skb,
					 struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);
	struct dst_entry *dst = skb_dst(skb);
	struct net_device_stats *stats;
	bool truncate = false;
	int encap_limit = -1;
	__u8 dsfield = false;
	struct flowi6 fl6;
	int err = -EINVAL;
	__u32 mtu;
	int nhoff;
	int thoff;

	if (!ip6_tnl_xmit_ctl(t, &t->parms.laddr, &t->parms.raddr))
		goto tx_err;

	if (gre_handle_offloads(skb, false))
		goto tx_err;

	if (skb->len > dev->mtu + dev->hard_header_len) {
		pskb_trim(skb, dev->mtu + dev->hard_header_len);
		truncate = true;
	}

	nhoff = skb_network_header(skb) - skb_mac_header(skb);
	if (skb->protocol == htons(ETH_P_IP) &&
	    (ntohs(ip_hdr(skb)->tot_len) > skb->len - nhoff))
		truncate = true;

	thoff = skb_transport_header(skb) - skb_mac_header(skb);
	if (skb->protocol == htons(ETH_P_IPV6) &&
	    (ntohs(ipv6_hdr(skb)->payload_len) > skb->len - thoff))
		truncate = true;

	if (skb_cow_head(skb, dev->needed_headroom ?: t->hlen))
		goto tx_err;

	t->parms.o_flags &= ~TUNNEL_KEY;
	IPCB(skb)->flags = 0;

	/* For collect_md mode, derive fl6 from the tunnel key,
         * for native mode, call prepare_ip6gre_xmit_{ipv4,ipv6}.
         */
	if (t->parms.collect_md) {
		struct ip_tunnel_info *tun_info;
		const struct ip_tunnel_key *key;
		struct erspan_metadata *md;
		__be32 tun_id;

		tun_info = skb_tunnel_info(skb);
		if (unlikely(!tun_info ||
			     !(tun_info->mode & IP_TUNNEL_INFO_TX) ||
			     ip_tunnel_info_af(tun_info) != AF_INET6))
			return -EINVAL;

		key = &tun_info->key;
		memset(&fl6, 0, sizeof(fl6));
		fl6.flowi6_proto = IPPROTO_GRE;
		fl6.daddr = key->u.ipv6.dst;
		fl6.flowlabel = key->label;
		fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL);

		dsfield = key->tos;
		md = ip_tunnel_info_opts(tun_info);
		if (!md)
			goto tx_err;

		tun_id = tunnel_id_to_key32(key->tun_id);
		if (md->version == 1) {
			erspan_build_header(skb,
					    ntohl(tun_id),
					    ntohl(md->u.index), truncate,
					    false);
		} else if (md->version == 2) {
			erspan_build_header_v2(skb,
					       ntohl(tun_id),
					       md->u.md2.dir,
					       get_hwid(&md->u.md2),
					       truncate, false);
		} else {
			goto tx_err;
		}
	} else {
		struct ipv6hdr *ipv6h = ipv6_hdr(skb);

		switch (skb->protocol) {
		case htons(ETH_P_IP):
			memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
			prepare_ip6gre_xmit_ipv4(skb, dev, &fl6,
						 &dsfield, &encap_limit);
			break;
		case htons(ETH_P_IPV6):
			if (ipv6_addr_equal(&t->parms.raddr, &ipv6h->saddr))
				goto tx_err;
			if (prepare_ip6gre_xmit_ipv6(skb, dev, &fl6,
						     &dsfield, &encap_limit))
				goto tx_err;
			break;
		default:
			memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
			break;
		}

		if (t->parms.erspan_ver == 1)
			erspan_build_header(skb, ntohl(t->parms.o_key),
					    t->parms.index,
					    truncate, false);
		else if (t->parms.erspan_ver == 2)
			erspan_build_header_v2(skb, ntohl(t->parms.o_key),
					       t->parms.dir,
					       t->parms.hwid,
					       truncate, false);
		else
			goto tx_err;

		fl6.daddr = t->parms.raddr;
	}

	/* Push GRE header. */
	gre_build_header(skb, 8, TUNNEL_SEQ,
			 htons(ETH_P_ERSPAN), 0, htonl(t->o_seqno++));

	/* TooBig packet may have updated dst->dev's mtu */
	if (!t->parms.collect_md && dst && dst_mtu(dst) > dst->dev->mtu)
		dst->ops->update_pmtu(dst, NULL, skb, dst->dev->mtu);

	err = ip6_tnl_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu,
			   NEXTHDR_GRE);
	if (err != 0) {
		/* XXX: send ICMP error even if DF is not set. */
		if (err == -EMSGSIZE) {
			if (skb->protocol == htons(ETH_P_IP))
				icmp_send(skb, ICMP_DEST_UNREACH,
					  ICMP_FRAG_NEEDED, htonl(mtu));
			else
				icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
		}

		goto tx_err;
	}
	return NETDEV_TX_OK;

tx_err:
	stats = &t->dev->stats;
	stats->tx_errors++;
	stats->tx_dropped++;
	kfree_skb(skb);
	return NETDEV_TX_OK;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 803 87.66% 10 55.56%
Dmitry Kozlov 89 9.72% 1 5.56%
Prashant Bhole 10 1.09% 1 5.56%
Petr Machata 5 0.55% 1 5.56%
Tom Herbert 5 0.55% 2 11.11%
Alexander Duyck 2 0.22% 1 5.56%
Haishuang Yan 1 0.11% 1 5.56%
Oussama Ghorbel 1 0.11% 1 5.56%
Total 916 100.00% 18 100.00%



static void ip6gre_tnl_link_config_common(struct ip6_tnl *t)
{
	struct net_device *dev = t->dev;
	struct __ip6_tnl_parm *p = &t->parms;
	struct flowi6 *fl6 = &t->fl.u.ip6;

	if (dev->type != ARPHRD_ETHER) {
		memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr));
		memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr));
	}

	/* Set up flowi template */
	fl6->saddr = p->laddr;
	fl6->daddr = p->raddr;
	fl6->flowi6_oif = p->link;
	fl6->flowlabel = 0;
	fl6->flowi6_proto = IPPROTO_GRE;

	if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS))
		fl6->flowlabel |= IPV6_TCLASS_MASK & p->flowinfo;
	if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL))
		fl6->flowlabel |= IPV6_FLOWLABEL_MASK & p->flowinfo;

	p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV|IP6_TNL_F_CAP_PER_PACKET);
	p->flags |= ip6_tnl_get_cap(t, &p->laddr, &p->raddr);

	if (p->flags&IP6_TNL_F_CAP_XMIT &&
			p->flags&IP6_TNL_F_CAP_RCV && dev->type != ARPHRD_ETHER)
		dev->flags |= IFF_POINTOPOINT;
	else
		dev->flags &= ~IFF_POINTOPOINT;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 154 65.53% 1 25.00%
Dmitry Kozlov 77 32.77% 1 25.00%
Petr Machata 2 0.85% 1 25.00%
Craig Gallek 2 0.85% 1 25.00%
Total 235 100.00% 4 100.00%



static void ip6gre_tnl_link_config_route(struct ip6_tnl *t, int set_mtu,
					 int t_hlen)
{
	const struct __ip6_tnl_parm *p = &t->parms;
	struct net_device *dev = t->dev;

	if (p->flags & IP6_TNL_F_CAP_XMIT) {
		int strict = (ipv6_addr_type(&p->raddr) &
			      (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL));

		struct rt6_info *rt = rt6_lookup(t->net,
						 &p->raddr, &p->laddr,
						 p->link, NULL, strict);

		if (!rt)
			return;

		if (rt->dst.dev) {
			dev->hard_header_len = rt->dst.dev->hard_header_len +
					       t_hlen;

			if (set_mtu) {
				dev->mtu = rt->dst.dev->mtu - t_hlen;
				if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
					dev->mtu -= 8;
				if (dev->type == ARPHRD_ETHER)
					dev->mtu -= ETH_HLEN;

				if (dev->mtu < IPV6_MIN_MTU)
					dev->mtu = IPV6_MIN_MTU;
			}
		}
		ip6_rt_put(rt);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 151 76.26% 1 25.00%
Petr Machata 30 15.15% 1 25.00%
Dmitry Kozlov 15 7.58% 1 25.00%
David Ahern 2 1.01% 1 25.00%
Total 198 100.00% 4 100.00%



static int ip6gre_calc_hlen(struct ip6_tnl *tunnel)
{
	int t_hlen;

	tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags);
	tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen;

	t_hlen = tunnel->hlen + sizeof(struct ipv6hdr);
	tunnel->dev->hard_header_len = LL_MAX_HEADER + t_hlen;
	return t_hlen;
}

Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 44 68.75% 1 33.33%
Dmitry Kozlov 16 25.00% 1 33.33%
William Tu 4 6.25% 1 33.33%
Total 64 100.00% 3 100.00%



static void ip6gre_tnl_link_config(struct ip6_tnl *t, int set_mtu)
{
	ip6gre_tnl_link_config_common(t);
	ip6gre_tnl_link_config_route(t, set_mtu, ip6gre_calc_hlen(t));
}

Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%



static void ip6gre_tnl_copy_tnl_parm(struct ip6_tnl *t,
				     const struct __ip6_tnl_parm *p)
{
	t->parms.laddr = p->laddr;
	t->parms.raddr = p->raddr;
	t->parms.flags = p->flags;
	t->parms.hop_limit = p->hop_limit;
	t->parms.encap_limit = p->encap_limit;
	t->parms.flowinfo = p->flowinfo;
	t->parms.link = p->link;
	t->parms.proto = p->proto;
	t->parms.i_key = p->i_key;
	t->parms.o_key = p->o_key;
	t->parms.i_flags = p->i_flags;
	t->parms.o_flags = p->o_flags;
	t->parms.fwmark = p->fwmark;
	dst_cache_reset(&t->dst_cache);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 96 61.94% 1 33.33%
William Tu 56 36.13% 1 33.33%
Petr Machata 3 1.94% 1 33.33%
Total 155 100.00% 3 100.00%



static int ip6gre_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p,
			     int set_mtu)
{
	ip6gre_tnl_copy_tnl_parm(t, p);
	ip6gre_tnl_link_config(t, set_mtu);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 26 70.27% 1 50.00%
William Tu 11 29.73% 1 50.00%
Total 37 100.00% 2 100.00%



static void ip6gre_tnl_parm_from_user(struct __ip6_tnl_parm *p,
	const struct ip6_tnl_parm2 *u)
{
	p->laddr = u->laddr;
	p->raddr = u->raddr;
	p->flags = u->flags;
	p->hop_limit = u->hop_limit;
	p->encap_limit = u->encap_limit;
	p->flowinfo = u->flowinfo;
	p->link = u->link;
	p->i_key = u->i_key;
	p->o_key = u->o_key;
	p->i_flags = gre_flags_to_tnl_flags(u->i_flags);
	p->o_flags = gre_flags_to_tnl_flags(u->o_flags);
	memcpy(p->name, u->name, sizeof(u->name));
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 92 71.32% 1 20.00%
Dmitry Kozlov 26 20.16% 1 20.00%
Américo Wang 9 6.98% 1 20.00%
Nicolas Dichtel 1 0.78% 1 20.00%
Tom Herbert 1 0.78% 1 20.00%
Total 129 100.00% 5 100.00%



static void ip6gre_tnl_parm_to_user(struct ip6_tnl_parm2 *u,
	const struct __ip6_tnl_parm *p)
{
	u->proto = IPPROTO_GRE;
	u->laddr = p->laddr;
	u->raddr = p->raddr;
	u->flags = p->flags;
	u->hop_limit = p->hop_limit;
	u->encap_limit = p->encap_limit;
	u->flowinfo = p->flowinfo;
	u->link = p->link;
	u->i_key = p->i_key;
	u->o_key = p->o_key;
	u->i_flags = gre_tnl_flags_to_gre_flags(p->i_flags);
	u->o_flags = gre_tnl_flags_to_gre_flags(p->o_flags);
	memcpy(u->name, p->name, sizeof(u->name));
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 120 88.89% 1 50.00%
Dmitry Kozlov 15 11.11% 1 50.00%
Total 135 100.00% 2 100.00%



static int ip6gre_tunnel_ioctl(struct net_device *dev,
	struct ifreq *ifr, int cmd)
{
	int err = 0;
	struct ip6_tnl_parm2 p;
	struct __ip6_tnl_parm p1;
	struct ip6_tnl *t = netdev_priv(dev);
	struct net *net = t->net;
	struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);

	memset(&p1, 0, sizeof(p1));

	switch (cmd) {
	case SIOCGETTUNNEL:
		if (dev == ign->fb_tunnel_dev) {
			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
				err = -EFAULT;
				break;
			}
			ip6gre_tnl_parm_from_user(&p1, &p);
			t = ip6gre_tunnel_locate(net, &p1, 0);
			if (!t)
				t = netdev_priv(dev);
		}
		memset(&p, 0, sizeof(p));
		ip6gre_tnl_parm_to_user(&p, &t->parms);
		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
			err = -EFAULT;
		break;

	case SIOCADDTUNNEL:
	case SIOCCHGTUNNEL:
		err = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			goto done;

		err = -EFAULT;
		if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
			goto done;

		err = -EINVAL;
		if ((p.i_flags|p.o_flags)&(GRE_VERSION|GRE_ROUTING))
			goto done;

		if (!(p.i_flags&GRE_KEY))
			p.i_key = 0;
		if (!(p.o_flags&GRE_KEY))
			p.o_key = 0;

		ip6gre_tnl_parm_from_user(&p1, &p);
		t = ip6gre_tunnel_locate(net, &p1, cmd == SIOCADDTUNNEL);

		if (dev != ign->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
			if (t) {
				if (t->dev != dev) {
					err = -EEXIST;
					break;
				}
			} else {
				t = netdev_priv(dev);

				ip6gre_tunnel_unlink(ign, t);
				synchronize_net();
				ip6gre_tnl_change(t, &p1, 1);
				ip6gre_tunnel_link(ign, t);
				netdev_state_change(dev);
			}
		}

		if (t) {
			err = 0;

			memset(&p, 0, sizeof(p));
			ip6gre_tnl_parm_to_user(&p, &t->parms);
			if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
				err = -EFAULT;
		} else
			err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT);
		break;

	case SIOCDELTUNNEL:
		err = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			goto done;

		if (dev == ign->fb_tunnel_dev) {
			err = -EFAULT;
			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
				goto done;
			err = -ENOENT;
			ip6gre_tnl_parm_from_user(&p1, &p);
			t = ip6gre_tunnel_locate(net, &p1, 0);
			if (!t)
				goto done;
			err = -EPERM;
			if (t == netdev_priv(ign->fb_tunnel_dev))
				goto done;
			dev = t->dev;
		}
		unregister_netdevice(dev);
		err = 0;
		break;

	default:
		err = -EINVAL;
	}

done:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 376 59.49% 1 20.00%
William Tu 234 37.03% 1 20.00%
Américo Wang 13 2.06% 1 20.00%
Eric W. Biedermann 8 1.27% 1 20.00%
Ian Morris 1 0.16% 1 20.00%
Total 632 100.00% 5 100.00%



static int ip6gre_header(struct sk_buff *skb, struct net_device *dev,
			 unsigned short type, const void *daddr,
			 const void *saddr, unsigned int len)
{
	struct ip6_tnl *t = netdev_priv(dev);
	struct ipv6hdr *ipv6h;
	__be16 *p;

	ipv6h = skb_push(skb, t->hlen + sizeof(*ipv6h));
	ip6_flow_hdr(ipv6h, 0, ip6_make_flowlabel(dev_net(dev), skb,
						  t->fl.u.ip6.flowlabel,
						  true, &t->fl.u.ip6));
	ipv6h->hop_limit = t->parms.hop_limit;
	ipv6h->nexthdr = NEXTHDR_GRE;
	ipv6h->saddr = t->parms.laddr;
	ipv6h->daddr = t->parms.raddr;

	p = (__be16 *)(ipv6h + 1);
	p[0] = t->parms.o_flags;
	p[1] = htons(type);

	/*
         *      Set the source hardware address.
         */

	if (saddr)
		memcpy(&ipv6h->saddr, saddr, sizeof(struct in6_addr));
	if (daddr)
		memcpy(&ipv6h->daddr, daddr, sizeof(struct in6_addr));
	if (!ipv6_addr_any(&ipv6h->daddr))
		return t->hlen;

	return -t->hlen;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 189 78.75% 1 16.67%
Xin Long 25 10.42% 1 16.67%
Tom Herbert 21 8.75% 3 50.00%
Hideaki Yoshifuji / 吉藤英明 5 2.08% 1 16.67%
Total 240 100.00% 6 100.00%


static const struct header_ops ip6gre_header_ops = {
	.create	= ip6gre_header,
};


static const struct net_device_ops ip6gre_netdev_ops = {
	.ndo_init		= ip6gre_tunnel_init,
	.ndo_uninit		= ip6gre_tunnel_uninit,
	.ndo_start_xmit		= ip6gre_tunnel_xmit,
	.ndo_do_ioctl		= ip6gre_tunnel_ioctl,
	.ndo_change_mtu		= ip6_tnl_change_mtu,
	.ndo_get_stats64	= ip_tunnel_get_stats64,
	.ndo_get_iflink		= ip6_tnl_get_iflink,
};



static void ip6gre_dev_free(struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);

	gro_cells_destroy(&t->gro_cells);
	dst_cache_destroy(&t->dst_cache);
	free_percpu(dev->tstats);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 18 40.91% 1 25.00%
Martin KaFai Lau 14 31.82% 1 25.00%
Eran Ben Elisha 8 18.18% 1 25.00%
Paolo Abeni 4 9.09% 1 25.00%
Total 44 100.00% 4 100.00%



static void ip6gre_tunnel_setup(struct net_device *dev)
{
	dev->netdev_ops = &ip6gre_netdev_ops;
	dev->needs_free_netdev = true;
	dev->priv_destructor = ip6gre_dev_free;

	dev->type = ARPHRD_IP6GRE;

	dev->flags |= IFF_NOARP;
	dev->addr_len = sizeof(struct in6_addr);
	netif_keep_dst(dev);
	/* This perm addr will be used as interface identifier by IPv6 */
	dev->addr_assign_type = NET_ADDR_RANDOM;
	eth_random_addr(dev->perm_addr);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 47 66.20% 1 25.00%
Felix Jia 14 19.72% 1 25.00%
David S. Miller 7 9.86% 1 25.00%
Eric Dumazet 3 4.23% 1 25.00%
Total 71 100.00% 4 100.00%


#define GRE6_FEATURES (NETIF_F_SG |           \
                       NETIF_F_FRAGLIST |       \
                       NETIF_F_HIGHDMA |        \
                       NETIF_F_HW_CSUM)



static void ip6gre_tnl_init_features(struct net_device *dev)
{
	struct ip6_tnl *nt = netdev_priv(dev);

	dev->features		|= GRE6_FEATURES;
	dev->hw_features	|= GRE6_FEATURES;

	if (!(nt->parms.o_flags & TUNNEL_SEQ)) {
		/* TCP offload with GRE SEQ is not supported, nor
                 * can we support 2 levels of outer headers requiring
                 * an update.
                 */
		if (!(nt->parms.o_flags & TUNNEL_CSUM) ||
		    nt->encap.type == TUNNEL_ENCAP_NONE) {
			dev->features    |= NETIF_F_GSO_SOFTWARE;
			dev->hw_features |= NETIF_F_GSO_SOFTWARE;
		}

		/* Can use a lockless transmit, unless we generate
                 * output sequences
                 */
		dev->features |= NETIF_F_LLTX;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Alexey Kodanev 91 100.00% 1 100.00%
Total 91 100.00% 1 100.00%



static int ip6gre_tunnel_init_common(struct net_device *dev)
{
	struct ip6_tnl *tunnel;
	int ret;
	int t_hlen;

	tunnel = netdev_priv(dev);

	tunnel->dev = dev;
	tunnel->net = dev_net(dev);
	strcpy(tunnel->parms.name, dev->name);

	dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
	if (!dev->tstats)
		return -ENOMEM;

	ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL);
	if (ret)
		goto cleanup_alloc_pcpu_stats;

	ret = gro_cells_init(&tunnel->gro_cells, dev);
	if (ret)
		goto cleanup_dst_cache_init;

	t_hlen = ip6gre_calc_hlen(tunnel);
	dev->mtu = ETH_DATA_LEN - t_hlen;
	if (dev->type == ARPHRD_ETHER)
		dev->mtu -= ETH_HLEN;
	if (!(tunnel->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
		dev->mtu -= 8;

	if (tunnel->parms.collect_md) {
		dev->features |= NETIF_F_NETNS_LOCAL;
		netif_keep_dst(dev);
	}
	ip6gre_tnl_init_features(dev);

	return 0;

cleanup_dst_cache_init:
	dst_cache_destroy(&tunnel->dst_cache);
cleanup_alloc_pcpu_stats:
	free_percpu(dev->tstats);
	dev->tstats = NULL;
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Eran Ben Elisha 45 20.36% 1 9.09%
Martin KaFai Lau 44 19.91% 2 18.18%
Dmitry Kozlov 40 18.10% 1 9.09%
Tom Herbert 35 15.84% 1 9.09%
William Tu 21 9.50% 1 9.09%
Haishuang Yan 14 6.33% 1 9.09%
Nicolas Dichtel 9 4.07% 1 9.09%
Paolo Abeni 6 2.71% 1 9.09%
Alexey Kodanev 5 2.26% 1 9.09%
Petr Machata 2 0.90% 1 9.09%
Total 221 100.00% 11 100.00%



static int ip6gre_tunnel_init(struct net_device *dev)
{
	struct ip6_tnl *tunnel;
	int ret;

	ret = ip6gre_tunnel_init_common(dev);
	if (ret)
		return ret;

	tunnel = netdev_priv(dev);

	if (tunnel->parms.collect_md)
		return 0;

	memcpy(dev->dev_addr, &tunnel->parms.laddr, sizeof(struct in6_addr));
	memcpy(dev->broadcast, &tunnel->parms.raddr, sizeof(struct in6_addr));

	if (ipv6_addr_any(&tunnel->parms.raddr))
		dev->header_ops = &ip6gre_header_ops;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 63 55.75% 1 33.33%
Martin KaFai Lau 39 34.51% 1 33.33%
William Tu 11 9.73% 1 33.33%
Total 113 100.00% 3 100.00%



static void ip6gre_fb_tunnel_init(struct net_device *dev)
{
	struct ip6_tnl *tunnel = netdev_priv(dev);

	tunnel->dev = dev;
	tunnel->net = dev_net(dev);
	strcpy(tunnel->parms.name, dev->name);

	tunnel->hlen		= sizeof(struct ipv6hdr) + 4;

	dev_hold(dev);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 57 86.36% 1 50.00%
Nicolas Dichtel 9 13.64% 1 50.00%
Total 66 100.00% 2 100.00%


static struct inet6_protocol ip6gre_protocol __read_mostly = {
	.handler     = gre_rcv,
	.err_handler = ip6gre_err,
	.flags       = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
};



static void ip6gre_destroy_tunnels(struct net *net, struct list_head *head)
{
	struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);
	struct net_device *dev, *aux;
	int prio;

	for_each_netdev_safe(net, dev, aux)
		if (dev->rtnl_link_ops == &ip6gre_link_ops ||
		    dev->rtnl_link_ops == &ip6gre_tap_ops ||
		    dev->rtnl_link_ops == &ip6erspan_tap_ops)
			unregister_netdevice_queue(dev, head);

	for (prio = 0; prio < 4; prio++) {
		int h;
		for (h = 0; h < IP6_GRE_HASH_SIZE; h++) {
			struct ip6_tnl *t;

			t = rtnl_dereference(ign->tunnels[prio][h]);

			while (t) {
				/* If dev is in the same netns, it has already
                                 * been added to the list by the previous loop.
                                 */
				if (!net_eq(dev_net(t->dev), net))
					unregister_netdevice_queue(t->dev,
								   head);
				t = rtnl_dereference(t->next);
			}
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 93 54.71% 1 25.00%
Nicolas Dichtel 69 40.59% 1 25.00%
William Tu 7 4.12% 1 25.00%
Jiri Kosina 1 0.59% 1 25.00%
Total 170 100.00% 4 100.00%



static int __net_init ip6gre_init_net(struct net *net)
{
	struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);
	int err;

	if (!net_has_fallback_tunnels(net))
		return 0;
	ign->fb_tunnel_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6gre0",
					  NET_NAME_UNKNOWN,
					  ip6gre_tunnel_setup);
	if (!ign->fb_tunnel_dev) {
		err = -ENOMEM;
		goto err_alloc_dev;
	}
	dev_net_set(ign->fb_tunnel_dev, net);
	/* FB netdevice is special: we have one, and only one per netns.
         * Allowing to move it to another netns is clearly unsafe.
         */
	ign->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL;


	ip6gre_fb_tunnel_init(ign->fb_tunnel_dev);
	ign->fb_tunnel_dev->rtnl_link_ops = &ip6gre_link_ops;

	err = register_netdev(ign->fb_tunnel_dev);
	if (err)
		goto err_reg_dev;

	rcu_assign_pointer(ign->tunnels_wc[0],
			   netdev_priv(ign->fb_tunnel_dev));
	return 0;

err_reg_dev:
	free_netdev(ign->fb_tunnel_dev);
err_alloc_dev:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 135 85.44% 1 20.00%
Eric Dumazet 11 6.96% 1 20.00%
Nicolas Dichtel 9 5.70% 1 20.00%
Tom Gundersen 2 1.27% 1 20.00%
David S. Miller 1 0.63% 1 20.00%
Total 158 100.00% 5 100.00%



static void __net_exit ip6gre_exit_batch_net(struct list_head *net_list)
{
	struct net *net;
	LIST_HEAD(list);

	rtnl_lock();
	list_for_each_entry(net, net_list, exit_list)
		ip6gre_destroy_tunnels(net, &list);
	unregister_netdevice_many(&list);
	rtnl_unlock();
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 33 66.00% 1 33.33%
Eric Dumazet 16 32.00% 1 33.33%
Nicolas Dichtel 1 2.00% 1 33.33%
Total 50 100.00% 3 100.00%


static struct pernet_operations ip6gre_net_ops = {
	.init = ip6gre_init_net,
	.exit_batch = ip6gre_exit_batch_net,
	.id   = &ip6gre_net_id,
	.size = sizeof(struct ip6gre_net),
};



static int ip6gre_tunnel_validate(struct nlattr *tb[], struct nlattr *data[],
				  struct netlink_ext_ack *extack)
{
	__be16 flags;

	if (!data)
		return 0;

	flags = 0;
	if (data[IFLA_GRE_IFLAGS])
		flags |= nla_get_be16(data[IFLA_GRE_IFLAGS]);
	if (data[IFLA_GRE_OFLAGS])
		flags |= nla_get_be16(data[IFLA_GRE_OFLAGS]);
	if (flags & (GRE_VERSION|GRE_ROUTING))
		return -EINVAL;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 89 100.00% 1 100.00%
Total 89 100.00% 1 100.00%



static int ip6gre_tap_validate(struct nlattr *tb[], struct nlattr *data[],
			       struct netlink_ext_ack *extack)
{
	struct in6_addr daddr;

	if (tb[IFLA_ADDRESS]) {
		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
			return -EINVAL;
		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
			return -EADDRNOTAVAIL;
	}

	if (!data)
		goto out;

	if (data[IFLA_GRE_REMOTE]) {
		daddr = nla_get_in6_addr(data[IFLA_GRE_REMOTE]);
		if (ipv6_addr_any(&daddr))
			return -EINVAL;
	}

out:
	return ip6gre_tunnel_validate(tb, data, extack);
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 121 100.00% 1 100.00%
Total 121 100.00% 1 100.00%



static int ip6erspan_tap_validate(struct nlattr *tb[], struct nlattr *data[],
				  struct netlink_ext_ack *extack)
{
	__be16 flags = 0;
	int ret, ver = 0;

	if (!data)
		return 0;

	ret = ip6gre_tap_validate(tb, data, extack);
	if (ret)
		return ret;

	/* ERSPAN should only have GRE sequence and key flag */
	if (data[IFLA_GRE_OFLAGS])
		flags |= nla_get_be16(data[IFLA_GRE_OFLAGS]);
	if (data[IFLA_GRE_IFLAGS])
		flags |= nla_get_be16(data[IFLA_GRE_IFLAGS]);
	if (!data[IFLA_GRE_COLLECT_METADATA] &&
	    flags != (GRE_SEQ | GRE_KEY))
		return -EINVAL;

	/* ERSPAN Session ID only has 10-bit. Since we reuse
         * 32-bit key field as ID, check it's range.
         */
	if (data[IFLA_GRE_IKEY] &&
	    (ntohl(nla_get_be32(data[IFLA_GRE_IKEY])) & ~ID_MASK))
		return -EINVAL;

	if (data[IFLA_GRE_OKEY] &&
	    (ntohl(nla_get_be32(data[IFLA_GRE_OKEY])) & ~ID_MASK))
		return -EINVAL;

	if (data[IFLA_GRE_ERSPAN_VER]) {
		ver = nla_get_u8(data[IFLA_GRE_ERSPAN_VER]);
		if (ver != 1 && ver != 2)
			return -EINVAL;
	}

	if (ver == 1) {
		if (data[IFLA_GRE_ERSPAN_INDEX]) {
			u32 index = nla_get_u32(data[IFLA_GRE_ERSPAN_INDEX]);

			if (index & ~INDEX_MASK)
				return -EINVAL;
		}
	} else if (ver == 2) {
		if (data[IFLA_GRE_ERSPAN_DIR]) {
			u16 dir = nla_get_u8(data[IFLA_GRE_ERSPAN_DIR]);

			if (dir & ~(DIR_MASK >> DIR_OFFSET))
				return -EINVAL;
		}

		if (data[IFLA_GRE_ERSPAN_HWID]) {
			u16 hwid = nla_get_u16(data[IFLA_GRE_ERSPAN_HWID]);

			if (hwid & ~(HWID_MASK >> HWID_OFFSET))
				return -EINVAL;
		}
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 323 99.38% 2 66.67%
Dmitry Kozlov 2 0.62% 1 33.33%
Total 325 100.00% 3 100.00%



static void ip6gre_netlink_parms(struct nlattr *data[],
				struct __ip6_tnl_parm *parms)
{
	memset(parms, 0, sizeof(*parms));

	if (!data)
		return;

	if (data[IFLA_GRE_LINK])
		parms->link = nla_get_u32(data[IFLA_GRE_LINK]);

	if (data[IFLA_GRE_IFLAGS])
		parms->i_flags = gre_flags_to_tnl_flags(
				nla_get_be16(data[IFLA_GRE_IFLAGS]));

	if (data[IFLA_GRE_OFLAGS])
		parms->o_flags = gre_flags_to_tnl_flags(
				nla_get_be16(data[IFLA_GRE_OFLAGS]));

	if (data[IFLA_GRE_IKEY])
		parms->i_key = nla_get_be32(data[IFLA_GRE_IKEY]);

	if (data[IFLA_GRE_OKEY])
		parms->o_key = nla_get_be32(data[IFLA_GRE_OKEY]);

	if (data[IFLA_GRE_LOCAL])
		parms->laddr = nla_get_in6_addr(data[IFLA_GRE_LOCAL]);

	if (data[IFLA_GRE_REMOTE])
		parms->raddr = nla_get_in6_addr(data[IFLA_GRE_REMOTE]);

	if (data[IFLA_GRE_TTL])
		parms->hop_limit = nla_get_u8(data[IFLA_GRE_TTL]);

	if (data[IFLA_GRE_ENCAP_LIMIT])
		parms->encap_limit = nla_get_u8(data[IFLA_GRE_ENCAP_LIMIT]);

	if (data[IFLA_GRE_FLOWINFO])
		parms->flowinfo = nla_get_be32(data[IFLA_GRE_FLOWINFO]);

	if (data[IFLA_GRE_FLAGS])
		parms->flags = nla_get_u32(data[IFLA_GRE_FLAGS]);

	if (data[IFLA_GRE_FWMARK])
		parms->fwmark = nla_get_u32(data[IFLA_GRE_FWMARK]);

	if (data[IFLA_GRE_COLLECT_METADATA])
		parms->collect_md = true;

	if (data[IFLA_GRE_ERSPAN_VER])
		parms->erspan_ver = nla_get_u8(data[IFLA_GRE_ERSPAN_VER]);

	if (parms->erspan_ver == 1) {
		if (data[IFLA_GRE_ERSPAN_INDEX])
			parms->index = nla_get_u32(data[IFLA_GRE_ERSPAN_INDEX]);
	} else if (parms->erspan_ver == 2) {
		if (data[IFLA_GRE_ERSPAN_DIR])
			parms->dir = nla_get_u8(data[IFLA_GRE_ERSPAN_DIR]);
		if (data[IFLA_GRE_ERSPAN_HWID])
			parms->hwid = nla_get_u16(data[IFLA_GRE_ERSPAN_HWID]);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 290 76.32% 3 50.00%
Dmitry Kozlov 85 22.37% 1 16.67%
Matthias Schiffer 3 0.79% 1 16.67%
Jiri Benc 2 0.53% 1 16.67%
Total 380 100.00% 6 100.00%



static int ip6gre_tap_init(struct net_device *dev)
{
	int ret;

	ret = ip6gre_tunnel_init_common(dev);
	if (ret)
		return ret;

	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 24 64.86% 1 50.00%
Dmitry Kozlov 13 35.14% 1 50.00%
Total 37 100.00% 2 100.00%


static const struct net_device_ops ip6gre_tap_netdev_ops = {
	.ndo_init = ip6gre_tap_init,
	.ndo_uninit = ip6gre_tunnel_uninit,
	.ndo_start_xmit = ip6gre_tunnel_xmit,
	.ndo_set_mac_address = eth_mac_addr,
	.ndo_validate_addr = eth_validate_addr,
	.ndo_change_mtu = ip6_tnl_change_mtu,
	.ndo_get_stats64 = ip_tunnel_get_stats64,
	.ndo_get_iflink = ip6_tnl_get_iflink,
};



static int ip6erspan_calc_hlen(struct ip6_tnl *tunnel)
{
	int t_hlen;

	tunnel->tun_hlen = 8;
	tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen +
		       erspan_hdr_len(tunnel->parms.erspan_ver);

	t_hlen = tunnel->hlen + sizeof(struct ipv6hdr);
	tunnel->dev->hard_header_len = LL_MAX_HEADER + t_hlen;
	return t_hlen;
}

Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 66 100.00% 1 100.00%
Total 66 100.00% 1 100.00%



static int ip6erspan_tap_init(struct net_device *dev)
{
	struct ip6_tnl *tunnel;
	int t_hlen;
	int ret;

	tunnel = netdev_priv(dev);

	tunnel->dev = dev;
	tunnel->net = dev_net(dev);
	strcpy(tunnel->parms.name, dev->name);

	dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
	if (!dev->tstats)
		return -ENOMEM;

	ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL);
	if (ret)
		goto cleanup_alloc_pcpu_stats;

	ret = gro_cells_init(&tunnel->gro_cells, dev);
	if (ret)
		goto cleanup_dst_cache_init;

	t_hlen = ip6erspan_calc_hlen(tunnel);
	dev->mtu = ETH_DATA_LEN - t_hlen;
	if (dev->type == ARPHRD_ETHER)
		dev->mtu -= ETH_HLEN;
	if (!(tunnel->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
		dev->mtu -= 8;

	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
	ip6erspan_tnl_link_config(tunnel, 1);

	return 0;

cleanup_dst_cache_init:
	dst_cache_destroy(&tunnel->dst_cache);
cleanup_alloc_pcpu_stats:
	free_percpu(dev->tstats);
	dev->tstats = NULL;
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 101 48.56% 2 20.00%
Dmitry Kozlov 46 22.12% 1 10.00%
Eran Ben Elisha 45 21.63% 1 10.00%
Shweta Choudaha 6 2.88% 1 10.00%
Jiri Benc 3 1.44% 1 10.00%
Martin KaFai Lau 3 1.44% 1 10.00%
Petr Machata 2 0.96% 1 10.00%
Tom Herbert 1 0.48% 1 10.00%
Craig Gallek 1 0.48% 1 10.00%
Total 208 100.00% 10 100.00%


static const struct net_device_ops ip6erspan_netdev_ops = {
	.ndo_init =		ip6erspan_tap_init,
	.ndo_uninit =		ip6erspan_tunnel_uninit,
	.ndo_start_xmit =	ip6erspan_tunnel_xmit,
	.ndo_set_mac_address =	eth_mac_addr,
	.ndo_validate_addr =	eth_validate_addr,
	.ndo_change_mtu =	ip6_tnl_change_mtu,
	.ndo_get_stats64 =	ip_tunnel_get_stats64,
	.ndo_get_iflink =	ip6_tnl_get_iflink,
};



static void ip6gre_tap_setup(struct net_device *dev)
{

	ether_setup(dev);

	dev->max_mtu = 0;
	dev->netdev_ops = &ip6gre_tap_netdev_ops;
	dev->needs_free_netdev = true;
	dev->priv_destructor = ip6gre_dev_free;

	dev->features |= NETIF_F_NETNS_LOCAL;
	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
	netif_keep_dst(dev);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 34 52.31% 1 16.67%
Xin Long 11 16.92% 2 33.33%
David S. Miller 7 10.77% 1 16.67%
Jiri Benc 7 10.77% 1 16.67%
Shweta Choudaha 6 9.23% 1 16.67%
Total 65 100.00% 6 100.00%



bool is_ip6gretap_dev(const struct net_device *dev)
{
	return dev->netdev_ops == &ip6gre_tap_netdev_ops;
}
Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%

EXPORT_SYMBOL_GPL(is_ip6gretap_dev);



static bool ip6gre_netlink_encap_parms(struct nlattr *data[],
				       struct ip_tunnel_encap *ipencap)
{
	bool ret = false;

	memset(ipencap, 0, sizeof(*ipencap));

	if (!data)
		return ret;

	if (data[IFLA_GRE_ENCAP_TYPE]) {
		ret = true;
		ipencap->type = nla_get_u16(data[IFLA_GRE_ENCAP_TYPE]);
	}

	if (data[IFLA_GRE_ENCAP_FLAGS]) {
		ret = true;
		ipencap->flags = nla_get_u16(data[IFLA_GRE_ENCAP_FLAGS]);
	}

	if (data[IFLA_GRE_ENCAP_SPORT]) {
		ret = true;
		ipencap->sport = nla_get_be16(data[IFLA_GRE_ENCAP_SPORT]);
	}

	if (data[IFLA_GRE_ENCAP_DPORT]) {
		ret = true;
		ipencap->dport = nla_get_be16(data[IFLA_GRE_ENCAP_DPORT]);
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Tom Herbert 146 100.00% 1 100.00%
Total 146 100.00% 1 100.00%



static int ip6gre_newlink_common(struct net *src_net, struct net_device *dev,
				 struct nlattr *tb[], struct nlattr *data[],
				 struct netlink_ext_ack *extack)
{
	struct ip6_tnl *nt;
	struct ip_tunnel_encap ipencap;
	int err;

	nt = netdev_priv(dev);

	if (ip6gre_netlink_encap_parms(data, &ipencap)) {
		int err = ip6_tnl_encap_setup(nt, &ipencap);

		if (err < 0)
			return err;
	}

	if (dev->type == ARPHRD_ETHER && !tb[IFLA_ADDRESS])
		eth_hw_addr_random(dev);

	nt->dev = dev;
	nt->net = dev_net(dev);

	err = register_netdevice(dev);
	if (err)
		goto out;

	if (tb[IFLA_MTU])
		ip6_tnl_change_mtu(dev, nla_get_u32(tb[IFLA_MTU]));

	dev_hold(dev);

out:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 82 50.62% 1 16.67%
Tom Herbert 35 21.60% 1 16.67%
Alexey Kodanev 30 18.52% 1 16.67%
Nicolas Dichtel 9 5.56% 1 16.67%
Matthias Schiffer 5 3.09% 1 16.67%
Petr Machata 1 0.62% 1 16.67%
Total 162 100.00% 6 100.00%



static int ip6gre_newlink(struct net *src_net, struct net_device *dev,
			  struct nlattr *tb[], struct nlattr *data[],
			  struct netlink_ext_ack *extack)
{
	struct ip6_tnl *nt = netdev_priv(dev);
	struct net *net = dev_net(dev);
	struct ip6gre_net *ign;
	int err;

	ip6gre_netlink_parms(data, &nt->parms);
	ign = net_generic(net, ip6gre_net_id);

	if (nt->parms.collect_md) {
		if (rtnl_dereference(ign->collect_md_tun))
			return -EEXIST;
	} else {
		if (ip6gre_tunnel_find(net, &nt->parms, dev->type))
			return -EEXIST;
	}

	err = ip6gre_newlink_common(src_net, dev, tb, data, extack);
	if (!err) {
		ip6gre_tnl_link_config(nt, !tb[IFLA_MTU]);
		ip6gre_tunnel_link_md(ign, nt);
		ip6gre_tunnel_link(net_generic(net, ip6gre_net_id), nt);
	}
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 77 42.54% 1 16.67%
William Tu 57 31.49% 1 16.67%
Petr Machata 34 18.78% 1 16.67%
Matthias Schiffer 5 2.76% 1 16.67%
Nicolas Dichtel 5 2.76% 1 16.67%
Tom Herbert 3 1.66% 1 16.67%
Total 181 100.00% 6 100.00%


static struct ip6_tnl *

ip6gre_changelink_common(struct net_device *dev, struct nlattr *tb[],
			 struct nlattr *data[], struct __ip6_tnl_parm *p_p,
			 struct netlink_ext_ack *extack)
{
	struct ip6_tnl *t, *nt = netdev_priv(dev);
	struct net *net = nt->net;
	struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);
	struct ip_tunnel_encap ipencap;

	if (dev == ign->fb_tunnel_dev)
		return ERR_PTR(-EINVAL);

	if (ip6gre_netlink_encap_parms(data, &ipencap)) {
		int err = ip6_tnl_encap_setup(nt, &ipencap);

		if (err < 0)
			return ERR_PTR(err);
	}

	ip6gre_netlink_parms(data, p_p);

	t = ip6gre_tunnel_locate(net, p_p, 0);

	if (t) {
		if (t->dev != dev)
			return ERR_PTR(-EEXIST);
	} else {
		t = nt;
	}

	return t;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 99 57.56% 1 16.67%
Tom Herbert 35 20.35% 1 16.67%
Petr Machata 24 13.95% 1 16.67%
Nicolas Dichtel 9 5.23% 2 33.33%
Matthias Schiffer 5 2.91% 1 16.67%
Total 172 100.00% 6 100.00%



static int ip6gre_changelink(struct net_device *dev, struct nlattr *tb[],
			     struct nlattr *data[],
			     struct netlink_ext_ack *extack)
{
	struct ip6gre_net *ign = net_generic(dev_net(dev), ip6gre_net_id);
	struct __ip6_tnl_parm p;
	struct ip6_tnl *t;

	t = ip6gre_changelink_common(dev, tb, data, &p, extack);
	if (IS_ERR(t))
		return PTR_ERR(t);

	ip6gre_tunnel_unlink_md(ign, t);
	ip6gre_tunnel_unlink(ign, t);
	ip6gre_tnl_change(t, &p, !tb[IFLA_MTU]);
	ip6gre_tunnel_link_md(ign, t);
	ip6gre_tunnel_link(ign, t);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 80 63.49% 1 33.33%
Dmitry Kozlov 32 25.40% 1 33.33%
William Tu 14 11.11% 1 33.33%
Total 126 100.00% 3 100.00%



static void ip6gre_dellink(struct net_device *dev, struct list_head *head)
{
	struct net *net = dev_net(dev);
	struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);

	if (dev != ign->fb_tunnel_dev)
		unregister_netdevice_queue(dev, head);
}

Contributors
Person Tokens Prop Commits CommitProp
Nicolas Dichtel 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%



static size_t ip6gre_get_size(const struct net_device *dev)
{
	return
		/* IFLA_GRE_LINK */
		nla_total_size(4) +
		/* IFLA_GRE_IFLAGS */
		nla_total_size(2) +
		/* IFLA_GRE_OFLAGS */
		nla_total_size(2) +
		/* IFLA_GRE_IKEY */
		nla_total_size(4) +
		/* IFLA_GRE_OKEY */
		nla_total_size(4) +
		/* IFLA_GRE_LOCAL */
		nla_total_size(sizeof(struct in6_addr)) +
		/* IFLA_GRE_REMOTE */
		nla_total_size(sizeof(struct in6_addr)) +
		/* IFLA_GRE_TTL */
		nla_total_size(1) +
		/* IFLA_GRE_ENCAP_LIMIT */
		nla_total_size(1) +
		/* IFLA_GRE_FLOWINFO */
		nla_total_size(4) +
		/* IFLA_GRE_FLAGS */
		nla_total_size(4) +
		/* IFLA_GRE_ENCAP_TYPE */
		nla_total_size(2) +
		/* IFLA_GRE_ENCAP_FLAGS */
		nla_total_size(2) +
		/* IFLA_GRE_ENCAP_SPORT */
		nla_total_size(2) +
		/* IFLA_GRE_ENCAP_DPORT */
		nla_total_size(2) +
		/* IFLA_GRE_COLLECT_METADATA */
		nla_total_size(0) +
		/* IFLA_GRE_FWMARK */
		nla_total_size(4) +
		/* IFLA_GRE_ERSPAN_INDEX */
		nla_total_size(4) +
		0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 79 60.31% 1 16.67%
Tom Herbert 24 18.32% 1 16.67%
William Tu 12 9.16% 2 33.33%
Nicolas Dichtel 10 7.63% 1 16.67%
Craig Gallek 6 4.58% 1 16.67%
Total 131 100.00% 6 100.00%



static int ip6gre_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
	struct ip6_tnl *t = netdev_priv(dev);
	struct __ip6_tnl_parm *p = &t->parms;

	if (nla_put_u32(skb, IFLA_GRE_LINK, p->link) ||
	    nla_put_be16(skb, IFLA_GRE_IFLAGS,
			 gre_tnl_flags_to_gre_flags(p->i_flags)) ||
	    nla_put_be16(skb, IFLA_GRE_OFLAGS,
			 gre_tnl_flags_to_gre_flags(p->o_flags)) ||
	    nla_put_be32(skb, IFLA_GRE_IKEY, p->i_key) ||
	    nla_put_be32(skb, IFLA_GRE_OKEY, p->o_key) ||
	    nla_put_in6_addr(skb, IFLA_GRE_LOCAL, &p->laddr) ||
	    nla_put_in6_addr(skb, IFLA_GRE_REMOTE, &p->raddr) ||
	    nla_put_u8(skb, IFLA_GRE_TTL, p->hop_limit) ||
	    nla_put_u8(skb, IFLA_GRE_ENCAP_LIMIT, p->encap_limit) ||
	    nla_put_be32(skb, IFLA_GRE_FLOWINFO, p->flowinfo) ||
	    nla_put_u32(skb, IFLA_GRE_FLAGS, p->flags) ||
	    nla_put_u32(skb, IFLA_GRE_FWMARK, p->fwmark) ||
	    nla_put_u32(skb, IFLA_GRE_ERSPAN_INDEX, p->index))
		goto nla_put_failure;

	if (nla_put_u16(skb, IFLA_GRE_ENCAP_TYPE,
			t->encap.type) ||
	    nla_put_be16(skb, IFLA_GRE_ENCAP_SPORT,
			 t->encap.sport) ||
	    nla_put_be16(skb, IFLA_GRE_ENCAP_DPORT,
			 t->encap.dport) ||
	    nla_put_u16(skb, IFLA_GRE_ENCAP_FLAGS,
			t->encap.flags))
		goto nla_put_failure;

	if (p->collect_md) {
		if (nla_put_flag(skb, IFLA_GRE_COLLECT_METADATA))
			goto nla_put_failure;
	}

	if (nla_put_u8(skb, IFLA_GRE_ERSPAN_VER, p->erspan_ver))
		goto nla_put_failure;

	if (p->erspan_ver == 1) {
		if (nla_put_u32(skb, IFLA_GRE_ERSPAN_INDEX, p->index))
			goto nla_put_failure;
	} else if (p->erspan_ver == 2) {
		if (nla_put_u8(skb, IFLA_GRE_ERSPAN_DIR, p->dir))
			goto nla_put_failure;
		if (nla_put_u16(skb, IFLA_GRE_ERSPAN_HWID, p->hwid))
			goto nla_put_failure;
	}

	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 170 46.70% 1 11.11%
William Tu 116 31.87% 3 33.33%
Tom Herbert 63 17.31% 2 22.22%
Craig Gallek 11 3.02% 1 11.11%
Nicolas Dichtel 2 0.55% 1 11.11%
Jiri Benc 2 0.55% 1 11.11%
Total 364 100.00% 9 100.00%


static const struct nla_policy ip6gre_policy[IFLA_GRE_MAX + 1] = {
	[IFLA_GRE_LINK]        = { .type = NLA_U32 },
	[IFLA_GRE_IFLAGS]      = { .type = NLA_U16 },
	[IFLA_GRE_OFLAGS]      = { .type = NLA_U16 },
	[IFLA_GRE_IKEY]        = { .type = NLA_U32 },
	[IFLA_GRE_OKEY]        = { .type = NLA_U32 },
	[IFLA_GRE_LOCAL]       = { .len = FIELD_SIZEOF(struct ipv6hdr, saddr) },
	[IFLA_GRE_REMOTE]      = { .len = FIELD_SIZEOF(struct ipv6hdr, daddr) },
	[IFLA_GRE_TTL]         = { .type = NLA_U8 },
	[IFLA_GRE_ENCAP_LIMIT] = { .type = NLA_U8 },
	[IFLA_GRE_FLOWINFO]    = { .type = NLA_U32 },
	[IFLA_GRE_FLAGS]       = { .type = NLA_U32 },
	[IFLA_GRE_ENCAP_TYPE]   = { .type = NLA_U16 },
	[IFLA_GRE_ENCAP_FLAGS]  = { .type = NLA_U16 },
	[IFLA_GRE_ENCAP_SPORT]  = { .type = NLA_U16 },
	[IFLA_GRE_ENCAP_DPORT]  = { .type = NLA_U16 },
	[IFLA_GRE_COLLECT_METADATA] = { .type = NLA_FLAG },
	[IFLA_GRE_FWMARK]       = { .type = NLA_U32 },
	[IFLA_GRE_ERSPAN_INDEX] = { .type = NLA_U32 },
	[IFLA_GRE_ERSPAN_VER]	= { .type = NLA_U8 },
	[IFLA_GRE_ERSPAN_DIR]	= { .type = NLA_U8 },
	[IFLA_GRE_ERSPAN_HWID]	= { .type = NLA_U16 },
};



static void ip6erspan_tap_setup(struct net_device *dev)
{
	ether_setup(dev);

	dev->netdev_ops = &ip6erspan_netdev_ops;
	dev->needs_free_netdev = true;
	dev->priv_destructor = ip6gre_dev_free;

	dev->features |= NETIF_F_NETNS_LOCAL;
	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
	netif_keep_dst(dev);
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 59 100.00% 1 100.00%
Total 59 100.00% 1 100.00%



static int ip6erspan_newlink(struct net *src_net, struct net_device *dev,
			     struct nlattr *tb[], struct nlattr *data[],
			     struct netlink_ext_ack *extack)
{
	struct ip6_tnl *nt = netdev_priv(dev);
	struct net *net = dev_net(dev);
	struct ip6gre_net *ign;
	int err;

	ip6gre_netlink_parms(data, &nt->parms);
	ign = net_generic(net, ip6gre_net_id);

	if (nt->parms.collect_md) {
		if (rtnl_dereference(ign->collect_md_tun_erspan))
			return -EEXIST;
	} else {
		if (ip6gre_tunnel_find(net, &nt->parms, dev->type))
			return -EEXIST;
	}

	err = ip6gre_newlink_common(src_net, dev, tb, data, extack);
	if (!err) {
		ip6erspan_tnl_link_config(nt, !tb[IFLA_MTU]);
		ip6erspan_tunnel_link_md(ign, nt);
		ip6gre_tunnel_link(net_generic(net, ip6gre_net_id), nt);
	}
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
William Tu 97 53.59% 2 66.67%
Petr Machata 84 46.41% 1 33.33%
Total 181 100.00% 3 100.00%



static void ip6erspan_tnl_link_config(struct ip6_tnl *t, int set_mtu)
{
	ip6gre_tnl_link_config_common(t);
	ip6gre_tnl_link_config_route(t, set_mtu, ip6erspan_calc_hlen(t));
}

Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 29 93.55% 1 50.00%
William Tu 2 6.45% 1 50.00%
Total 31 100.00% 2 100.00%



static int ip6erspan_tnl_change(struct ip6_tnl *t,
				const struct __ip6_tnl_parm *p, int set_mtu)
{
	ip6gre_tnl_copy_tnl_parm(t, p);
	ip6erspan_tnl_link_config(t, set_mtu);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 35 94.59% 1 50.00%
William Tu 2 5.41% 1 50.00%
Total 37 100.00% 2 100.00%



static int ip6erspan_changelink(struct net_device *dev, struct nlattr *tb[],
				struct nlattr *data[],
				struct netlink_ext_ack *extack)
{
	struct ip6gre_net *ign = net_generic(dev_net(dev), ip6gre_net_id);
	struct __ip6_tnl_parm p;
	struct ip6_tnl *t;

	t = ip6gre_changelink_common(dev, tb, data, &p, extack);
	if (IS_ERR(t))
		return PTR_ERR(t);

	ip6gre_tunnel_unlink_md(ign, t);
	ip6gre_tunnel_unlink(ign, t);
	ip6erspan_tnl_change(t, &p, !tb[IFLA_MTU]);
	ip6erspan_tunnel_link_md(ign, t);
	ip6gre_tunnel_link(ign, t);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Petr Machata 92 73.02% 1 33.33%
William Tu 34 26.98% 2 66.67%
Total 126 100.00% 3 100.00%


static struct rtnl_link_ops ip6gre_link_ops __read_mostly = {
	.kind		= "ip6gre",
	.maxtype	= IFLA_GRE_MAX,
	.policy		= ip6gre_policy,
	.priv_size	= sizeof(struct ip6_tnl),
	.setup		= ip6gre_tunnel_setup,
	.validate	= ip6gre_tunnel_validate,
	.newlink	= ip6gre_newlink,
	.changelink	= ip6gre_changelink,
	.dellink	= ip6gre_dellink,
	.get_size	= ip6gre_get_size,
	.fill_info	= ip6gre_fill_info,
	.get_link_net	= ip6_tnl_get_link_net,
};


static struct rtnl_link_ops ip6gre_tap_ops __read_mostly = {
	.kind		= "ip6gretap",
	.maxtype	= IFLA_GRE_MAX,
	.policy		= ip6gre_policy,
	.priv_size	= sizeof(struct ip6_tnl),
	.setup		= ip6gre_tap_setup,
	.validate	= ip6gre_tap_validate,
	.newlink	= ip6gre_newlink,
	.changelink	= ip6gre_changelink,
	.get_size	= ip6gre_get_size,
	.fill_info	= ip6gre_fill_info,
	.get_link_net	= ip6_tnl_get_link_net,
};


static struct rtnl_link_ops ip6erspan_tap_ops __read_mostly = {
	.kind		= "ip6erspan",
	.maxtype	= IFLA_GRE_MAX,
	.policy		= ip6gre_policy,
	.priv_size	= sizeof(struct ip6_tnl),
	.setup		= ip6erspan_tap_setup,
	.validate	= ip6erspan_tap_validate,
	.newlink	= ip6erspan_newlink,
	.changelink	= ip6erspan_changelink,
	.get_size	= ip6gre_get_size,
	.fill_info	= ip6gre_fill_info,
	.get_link_net	= ip6_tnl_get_link_net,
};

/*
 *      And now the modules code and kernel interface.
 */



static int __init ip6gre_init(void)
{
	int err;

	pr_info("GRE over IPv6 tunneling driver\n");

	err = register_pernet_device(&ip6gre_net_ops);
	if (err < 0)
		return err;

	err = inet6_add_protocol(&ip6gre_protocol, IPPROTO_GRE);
	if (err < 0) {
		pr_info("%s: can't add protocol\n", __func__);
		goto add_proto_failed;
	}

	err = rtnl_link_register(&ip6gre_link_ops);
	if (err < 0)
		goto rtnl_link_failed;

	err = rtnl_link_register(&ip6gre_tap_ops);
	if (err < 0)
		goto tap_ops_failed;

	err = rtnl_link_register(&ip6erspan_tap_ops);
	if (err < 0)
		goto erspan_link_failed;

out:
	return err;

erspan_link_failed:
	rtnl_link_unregister(&ip6gre_tap_ops);
tap_ops_failed:
	rtnl_link_unregister(&ip6gre_link_ops);
rtnl_link_failed:
	inet6_del_protocol(&ip6gre_protocol, IPPROTO_GRE);
add_proto_failed:
	unregister_pernet_device(&ip6gre_net_ops);
	goto out;
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 130 83.87% 1 50.00%
William Tu 25 16.13% 1 50.00%
Total 155 100.00% 2 100.00%



static void __exit ip6gre_fini(void)
{
	rtnl_link_unregister(&ip6gre_tap_ops);
	rtnl_link_unregister(&ip6gre_link_ops);
	rtnl_link_unregister(&ip6erspan_tap_ops);
	inet6_del_protocol(&ip6gre_protocol, IPPROTO_GRE);
	unregister_pernet_device(&ip6gre_net_ops);
}

Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 35 85.37% 1 50.00%
William Tu 6 14.63% 1 50.00%
Total 41 100.00% 2 100.00%

module_init(ip6gre_init);
module_exit(ip6gre_fini);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("D. Kozlov (xeb@mail.ru)");
MODULE_DESCRIPTION("GRE over IPv6 tunneling device");
MODULE_ALIAS_RTNL_LINK("ip6gre");
MODULE_ALIAS_RTNL_LINK("ip6gretap");
MODULE_ALIAS_RTNL_LINK("ip6erspan");
MODULE_ALIAS_NETDEV("ip6gre0");
Overall Contributors
Person Tokens Prop Commits CommitProp
Dmitry Kozlov 5210 41.73% 1 0.88%
William Tu 4708 37.71% 18 15.79%
Tom Herbert 687 5.50% 10 8.77%
Petr Machata 649 5.20% 8 7.02%
Nicolas Dichtel 242 1.94% 10 8.77%
Eric Dumazet 169 1.35% 7 6.14%
Alexey Kodanev 138 1.11% 3 2.63%
Xin Long 122 0.98% 7 6.14%
Martin KaFai Lau 100 0.80% 2 1.75%
Eran Ben Elisha 98 0.79% 1 0.88%
Stephen Hemminger 45 0.36% 2 1.75%
Haishuang Yan 41 0.33% 5 4.39%
Craig Gallek 32 0.26% 1 0.88%
Américo Wang 31 0.25% 3 2.63%
Steffen Klassert 23 0.18% 2 1.75%
Jiri Benc 20 0.16% 4 3.51%
Matthias Schiffer 18 0.14% 3 2.63%
Alexander Duyck 16 0.13% 2 1.75%
David S. Miller 15 0.12% 1 0.88%
Paolo Abeni 14 0.11% 1 0.88%
Felix Jia 14 0.11% 1 0.88%
Shweta Choudaha 12 0.10% 1 0.88%
Bernie Harris 10 0.08% 1 0.88%
Prashant Bhole 10 0.08% 1 0.88%
Eric W. Biedermann 8 0.06% 1 0.88%
Jiri Kosina 7 0.06% 1 0.88%
Lorenzo Colitti 5 0.04% 1 0.88%
Hideaki Yoshifuji / 吉藤英明 5 0.04% 1 0.88%
Pravin B Shelar 5 0.04% 2 1.75%
Sabrina Dubroca 5 0.04% 1 0.88%
Matt Bennett 4 0.03% 1 0.88%
Tom Gundersen 4 0.03% 1 0.88%
Huaibin Wang 4 0.03% 1 0.88%
Tommi Rantala 3 0.02% 1 0.88%
David Ahern 2 0.02% 1 0.88%
Ian Morris 2 0.02% 1 0.88%
Alexey Dobriyan 1 0.01% 1 0.88%
Colin Ian King 1 0.01% 1 0.88%
Oussama Ghorbel 1 0.01% 1 0.88%
Florent Fourcot 1 0.01% 1 0.88%
Sun Lianwen 1 0.01% 1 0.88%
Peter Dawson 1 0.01% 1 0.88%
Total 12484 100.00% 114 100.00%
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
Dmitry Kozlov	27	96.43%	1	50.00%
Jiri Kosina	1	3.57%	1	50.00%
Total	28	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.18 net/ipv6/ip6_gre.c

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