[ovs.git] / datapath / linux / compat / include / net / ip_tunnels.h

#ifndef __NET_IP_TUNNELS_WRAPPER_H
#define __NET_IP_TUNNELS_WRAPPER_H 1

#include <linux/version.h>

#ifdef USE_UPSTREAM_TUNNEL
/* Block all ip_tunnel functions.
 * Only function that do not depend on ip_tunnel structure can
 * be used. Those needs to be explicitly defined in this header file. */
#include_next <net/ip_tunnels.h>

#ifndef TUNNEL_ERSPAN_OPT
#define TUNNEL_ERSPAN_OPT	__cpu_to_be16(0x4000)
#endif
#define ovs_ip_tunnel_encap ip_tunnel_encap

#ifndef HAVE_IP_TUNNEL_INFO_OPTS_SET_FLAGS
static inline void rpl_ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
					       const void *from, int len,
					       __be16 flags)
{
	memcpy(ip_tunnel_info_opts(info), from, len);
	info->options_len = len;
	info->key.tun_flags |= flags;
}

#define ip_tunnel_info_opts_set rpl_ip_tunnel_info_opts_set
#endif

#else /* USE_UPSTREAM_TUNNEL */

#include <linux/if_tunnel.h>
#include <linux/types.h>
#include <net/dsfield.h>
#include <net/dst_cache.h>
#include <net/flow.h>
#include <net/inet_ecn.h>
#include <net/ip.h>
#include <net/rtnetlink.h>
#include <net/gro_cells.h>

#ifndef MAX_IPTUN_ENCAP_OPS
#define MAX_IPTUN_ENCAP_OPS 8
#endif

#ifndef HAVE_TUNNEL_ENCAP_TYPES
enum tunnel_encap_types {
	TUNNEL_ENCAP_NONE,
	TUNNEL_ENCAP_FOU,
	TUNNEL_ENCAP_GUE,
};

#define HAVE_TUNNEL_ENCAP_TYPES 1
#endif

#define __iptunnel_pull_header rpl___iptunnel_pull_header
int rpl___iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
			   __be16 inner_proto, bool raw_proto, bool xnet);

#define iptunnel_pull_header rpl_iptunnel_pull_header
static inline int rpl_iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
				       __be16 inner_proto, bool xnet)
{
	return rpl___iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet);
}

int ovs_iptunnel_handle_offloads(struct sk_buff *skb,
				 int gso_type_mask,
				 void (*fix_segment)(struct sk_buff *));

/* This is required to compile upstream gre.h. gre_handle_offloads()
 * is defined in gre.h and needs iptunnel_handle_offloads(). This provides
 * default signature for this function.
 * rpl prefix is to make OVS build happy.
 */
#define iptunnel_handle_offloads rpl_iptunnel_handle_offloads
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)
struct sk_buff *rpl_iptunnel_handle_offloads(struct sk_buff *skb,
					     bool csum_help,
					     int gso_type_mask);
#else
int rpl_iptunnel_handle_offloads(struct sk_buff *skb,
				 bool csum_help,
				 int gso_type_mask);
#endif

#define iptunnel_xmit rpl_iptunnel_xmit
void rpl_iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
		       __be32 src, __be32 dst, __u8 proto, __u8 tos, __u8 ttl,
		       __be16 df, bool xnet);
#define ip_tunnel_xmit rpl_ip_tunnel_xmit
void rpl_ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
			const struct iphdr *tnl_params, const u8 protocol);


#ifndef TUNNEL_CSUM
#define TUNNEL_CSUM		__cpu_to_be16(0x01)
#define TUNNEL_ROUTING		__cpu_to_be16(0x02)
#define TUNNEL_KEY		__cpu_to_be16(0x04)
#define TUNNEL_SEQ		__cpu_to_be16(0x08)
#define TUNNEL_STRICT		__cpu_to_be16(0x10)
#define TUNNEL_REC		__cpu_to_be16(0x20)
#define TUNNEL_VERSION		__cpu_to_be16(0x40)
#define TUNNEL_NO_KEY		__cpu_to_be16(0x80)
#define TUNNEL_DONT_FRAGMENT    __cpu_to_be16(0x0100)
#define TUNNEL_OAM		__cpu_to_be16(0x0200)
#define TUNNEL_CRIT_OPT		__cpu_to_be16(0x0400)
#define TUNNEL_GENEVE_OPT	__cpu_to_be16(0x0800)
#define TUNNEL_VXLAN_OPT	__cpu_to_be16(0x1000)
#define TUNNEL_NOCACHE		__cpu_to_be16(0x2000)
#define TUNNEL_ERSPAN_OPT	__cpu_to_be16(0x4000)

#undef TUNNEL_OPTIONS_PRESENT
#define TUNNEL_OPTIONS_PRESENT \
		(TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT)

struct tnl_ptk_info {
	__be16 flags;
	__be16 proto;
	__be32 key;
	__be32 seq;
	int hdr_len;
};

#define PACKET_RCVD	0
#define PACKET_REJECT	1
#define PACKET_NEXT	2
#endif

#define IP_TNL_HASH_BITS   7
#define IP_TNL_HASH_SIZE   (1 << IP_TNL_HASH_BITS)

/* Keep error state on tunnel for 30 sec */
#define IPTUNNEL_ERR_TIMEO	(30*HZ)

/* Used to memset ip_tunnel padding. */
#define IP_TUNNEL_KEY_SIZE	offsetofend(struct ip_tunnel_key, tp_dst)

/* Used to memset ipv4 address padding. */
#define IP_TUNNEL_KEY_IPV4_PAD	offsetofend(struct ip_tunnel_key, u.ipv4.dst)
#define IP_TUNNEL_KEY_IPV4_PAD_LEN				\
	(FIELD_SIZEOF(struct ip_tunnel_key, u) -		\
	 FIELD_SIZEOF(struct ip_tunnel_key, u.ipv4))

struct ip_tunnel_key {
	__be64			tun_id;
	union {
		struct {
			__be32	src;
			__be32	dst;
		} ipv4;
		struct {
			struct in6_addr src;
			struct in6_addr dst;
		} ipv6;
	} u;
	__be16			tun_flags;
	u8			tos;		/* TOS for IPv4, TC for IPv6 */
	u8			ttl;		/* TTL for IPv4, HL for IPv6 */
	__be32                  label;          /* Flow Label for IPv6 */
	__be16			tp_src;
	__be16			tp_dst;
};

/* Flags for ip_tunnel_info mode. */
#define IP_TUNNEL_INFO_TX	0x01	/* represents tx tunnel parameters */
#define IP_TUNNEL_INFO_IPV6	0x02	/* key contains IPv6 addresses */

struct ip_tunnel_info {
	struct ip_tunnel_key	key;
	struct dst_cache        dst_cache;
	u8			options_len;
	u8			mode;
};

/* 6rd prefix/relay information */
#ifdef CONFIG_IPV6_SIT_6RD
struct ip_tunnel_6rd_parm {
	struct in6_addr		prefix;
	__be32			relay_prefix;
	u16			prefixlen;
	u16			relay_prefixlen;
};
#endif

struct ip_tunnel_encap {
	u16			type;
	u16			flags;
	__be16			sport;
	__be16			dport;
};

struct ip_tunnel_prl_entry {
	struct ip_tunnel_prl_entry __rcu *next;
	__be32				addr;
	u16				flags;
	struct rcu_head			rcu_head;
};

static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info *tun_info)
{
	return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET;
}

static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info)
{
	return info + 1;
}

static inline void ip_tunnel_info_opts_get(void *to,
					   const struct ip_tunnel_info *info)
{
	memcpy(to, info + 1, info->options_len);
}

static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
					   const void *from, int len)
{
	memcpy(ip_tunnel_info_opts(info), from, len);
	info->options_len = len;
}

static inline void ip_tunnel_key_init(struct ip_tunnel_key *key,
				      __be32 saddr, __be32 daddr,
				      u8 tos, u8 ttl, __be32 label,
				      __be16 tp_src, __be16 tp_dst,
				      __be64 tun_id, __be16 tun_flags)
{
	key->tun_id = tun_id;
	key->u.ipv4.src = saddr;
	key->u.ipv4.dst = daddr;
	memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD,
	       0, IP_TUNNEL_KEY_IPV4_PAD_LEN);
	key->tos = tos;
	key->ttl = ttl;
	key->label = label;
	key->tun_flags = tun_flags;

	/* For the tunnel types on the top of IPsec, the tp_src and tp_dst of
	 * the upper tunnel are used.
	 * E.g: GRE over IPSEC, the tp_src and tp_port are zero.
	 */
	key->tp_src = tp_src;
	key->tp_dst = tp_dst;

	/* Clear struct padding. */
	if (sizeof(*key) != IP_TUNNEL_KEY_SIZE)
		memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE,
		       0, sizeof(*key) - IP_TUNNEL_KEY_SIZE);
}

#define ip_tunnel_collect_metadata() true

#undef TUNNEL_NOCACHE
#define TUNNEL_NOCACHE 0

static inline bool
ip_tunnel_dst_cache_usable(const struct sk_buff *skb,
			   const struct ip_tunnel_info *info)
{
	if (skb->mark)
		return false;
	if (!info)
		return true;
	if (info->key.tun_flags & TUNNEL_NOCACHE)
		return false;

	return true;
}

#define ip_tunnel_dst rpl_ip_tunnel_dst
struct rpl_ip_tunnel_dst {
	struct dst_entry __rcu		*dst;
	__be32				saddr;
};

#define ip_tunnel rpl_ip_tunnel
struct rpl_ip_tunnel {
	struct ip_tunnel __rcu	*next;
	struct hlist_node hash_node;
	struct net_device	*dev;
	struct net		*net;	/* netns for packet i/o */

	unsigned long	err_time;	/* Time when the last ICMP error
					 * arrived */
	int		err_count;	/* Number of arrived ICMP errors */

	/* These four fields used only by GRE */
	u32		i_seqno;	/* The last seen seqno	*/
	u32		o_seqno;	/* The last output seqno */
	int		tun_hlen;	/* Precalculated header length */

	/* These four fields used only by ERSPAN */
	u32		index;		/* ERSPAN type II index */
	u8		erspan_ver;	/* ERSPAN version */
	u8		dir;		/* ERSPAN direction */
	u16		hwid;		/* ERSPAN hardware ID */

	struct dst_cache dst_cache;

	struct ip_tunnel_parm parms;

	int		mlink;
	int		encap_hlen;	/* Encap header length (FOU,GUE) */
	int		hlen;		/* tun_hlen + encap_hlen */
	struct ip_tunnel_encap encap;

	/* for SIT */
#ifdef CONFIG_IPV6_SIT_6RD
	struct ip_tunnel_6rd_parm ip6rd;
#endif
	struct ip_tunnel_prl_entry __rcu *prl;	/* potential router list */
	unsigned int		prl_count;	/* # of entries in PRL */
	unsigned int		ip_tnl_net_id;
	struct gro_cells	gro_cells;
	__u32			fwmark;
	bool			collect_md;
	bool			ignore_df;
};

#define ip_tunnel_net rpl_ip_tunnel_net
struct rpl_ip_tunnel_net {
	struct net_device *fb_tunnel_dev;
	struct hlist_head tunnels[IP_TNL_HASH_SIZE];
	struct ip_tunnel __rcu *collect_md_tun;
};


struct ip_tunnel_encap_ops {
	size_t (*encap_hlen)(struct ip_tunnel_encap *e);
	int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e,
			    const u8 *protocol, struct flowi4 *fl4);
};

extern const struct ip_tunnel_encap_ops __rcu *
		rpl_iptun_encaps[MAX_IPTUN_ENCAP_OPS];

#define ip_encap_hlen rpl_ip_encap_hlen
static inline int rpl_ip_encap_hlen(struct ip_tunnel_encap *e)
{
	const struct ip_tunnel_encap_ops *ops;
	int hlen = -EINVAL;

	if (e->type == TUNNEL_ENCAP_NONE)
		return 0;

	if (e->type >= MAX_IPTUN_ENCAP_OPS)
		return -EINVAL;

	rcu_read_lock();
	ops = rcu_dereference(rpl_iptun_encaps[e->type]);
	if (likely(ops && ops->encap_hlen))
		hlen = ops->encap_hlen(e);
	rcu_read_unlock();

	return hlen;
}

static inline int ovs_ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t,
				      const u8 *protocol, struct flowi4 *fl4)
{
	const struct ip_tunnel_encap_ops *ops;
	int ret = -EINVAL;

	if (t->encap.type == TUNNEL_ENCAP_NONE)
		return 0;

	if (t->encap.type >= MAX_IPTUN_ENCAP_OPS)
		return -EINVAL;

	rcu_read_lock();
	ops = rcu_dereference(rpl_iptun_encaps[t->encap.type]);
	if (likely(ops && ops->build_header))
		ret = ops->build_header(skb, &t->encap, protocol, fl4);
	rcu_read_unlock();

	return ret;
}

#define ip_tunnel_get_stats64 rpl_ip_tunnel_get_stats64
#if !defined(HAVE_VOID_NDO_GET_STATS64) && !defined(HAVE_RHEL7_MAX_MTU)
struct rtnl_link_stats64 *rpl_ip_tunnel_get_stats64(struct net_device *dev,
						    struct rtnl_link_stats64 *tot);
#else
void rpl_ip_tunnel_get_stats64(struct net_device *dev,
						    struct rtnl_link_stats64 *tot);
#endif
#define ip_tunnel_get_dsfield rpl_ip_tunnel_get_dsfield
static inline u8 rpl_ip_tunnel_get_dsfield(const struct iphdr *iph,
					   const struct sk_buff *skb)
{
	if (skb->protocol == htons(ETH_P_IP))
		return iph->tos;
	else if (skb->protocol == htons(ETH_P_IPV6))
		return ipv6_get_dsfield((const struct ipv6hdr *)iph);
	else
		return 0;
}

#define ip_tunnel_ecn_encap rpl_ip_tunnel_ecn_encap
static inline u8 rpl_ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph,
		const struct sk_buff *skb)
{
	u8 inner = ip_tunnel_get_dsfield(iph, skb);

	return INET_ECN_encapsulate(tos, inner);
}

static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len)
{
	if (pkt_len > 0) {
		struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats);

		u64_stats_update_begin(&tstats->syncp);
		tstats->tx_bytes += pkt_len;
		tstats->tx_packets++;
		u64_stats_update_end(&tstats->syncp);
		put_cpu_ptr(tstats);
	} else {
		struct net_device_stats *err_stats = &dev->stats;

		if (pkt_len < 0) {
			err_stats->tx_errors++;
			err_stats->tx_aborted_errors++;
		} else {
			err_stats->tx_dropped++;
		}
	}
}

static inline __be64 key32_to_tunnel_id(__be32 key)
{
#ifdef __BIG_ENDIAN
	return (__force __be64)key;
#else
	return (__force __be64)((__force u64)key << 32);
#endif
}

/* Returns the least-significant 32 bits of a __be64. */
static inline __be32 tunnel_id_to_key32(__be64 tun_id)
{
#ifdef __BIG_ENDIAN
	return (__force __be32)tun_id;
#else
	return (__force __be32)((__force u64)tun_id >> 32);
#endif
}

#define ip_tunnel_init rpl_ip_tunnel_init
int rpl_ip_tunnel_init(struct net_device *dev);

#define ip_tunnel_uninit rpl_ip_tunnel_uninit
void rpl_ip_tunnel_uninit(struct net_device *dev);

#define ip_tunnel_change_mtu rpl_ip_tunnel_change_mtu
int rpl_ip_tunnel_change_mtu(struct net_device *dev, int new_mtu);

#define ip_tunnel_newlink rpl_ip_tunnel_newlink
int rpl_ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],
			  struct ip_tunnel_parm *p);

#define ip_tunnel_dellink rpl_ip_tunnel_dellink
void rpl_ip_tunnel_dellink(struct net_device *dev, struct list_head *head);

#define ip_tunnel_init_net rpl_ip_tunnel_init_net
int rpl_ip_tunnel_init_net(struct net *net, int ip_tnl_net_id,
			   struct rtnl_link_ops *ops, char *devname);

#define ip_tunnel_delete_net rpl_ip_tunnel_delete_net
void rpl_ip_tunnel_delete_net(struct ip_tunnel_net *itn, struct rtnl_link_ops *ops);

#define ip_tunnel_setup rpl_ip_tunnel_setup
void rpl_ip_tunnel_setup(struct net_device *dev, int net_id);

#define ip_tunnel_get_iflink rpl_ip_tunnel_get_iflink
int rpl_ip_tunnel_get_iflink(const struct net_device *dev);

#define ip_tunnel_get_link_net rpl_ip_tunnel_get_link_net
struct net *rpl_ip_tunnel_get_link_net(const struct net_device *dev);

#define __ip_tunnel_change_mtu rpl___ip_tunnel_change_mtu
int rpl___ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict);

#define ip_tunnel_lookup rpl_ip_tunnel_lookup
struct ip_tunnel *rpl_ip_tunnel_lookup(struct ip_tunnel_net *itn,
				       int link, __be16 flags,
				       __be32 remote, __be32 local,
				       __be32 key);

static inline int iptunnel_pull_offloads(struct sk_buff *skb)
{
	if (skb_is_gso(skb)) {
		int err;

		err = skb_unclone(skb, GFP_ATOMIC);
		if (unlikely(err))
			return err;
		skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >>
					       NETIF_F_GSO_SHIFT);
	}

	skb->encapsulation = 0;
	return 0;
}
#endif /* USE_UPSTREAM_TUNNEL */

#define skb_is_encapsulated ovs_skb_is_encapsulated
bool ovs_skb_is_encapsulated(struct sk_buff *skb);

#endif /* __NET_IP_TUNNELS_H */
Commit	Line	Data
5ebaf571 PS	1	#ifndef __NET_IP_TUNNELS_WRAPPER_H
	2	#define __NET_IP_TUNNELS_WRAPPER_H 1
	3
29c71cfa	4	#include <linux/version.h>
705e9260	5
1c95839f	6	#ifdef USE_UPSTREAM_TUNNEL
7842e257 PS	7	/* Block all ip_tunnel functions.
	8	* Only function that do not depend on ip_tunnel structure can
	9	* be used. Those needs to be explicitly defined in this header file. */
29c71cfa	10	#include_next <net/ip_tunnels.h>
8e53509c WT	11
	12	#ifndef TUNNEL_ERSPAN_OPT
	13	#define TUNNEL_ERSPAN_OPT __cpu_to_be16(0x4000)
	14	#endif
	15	#define ovs_ip_tunnel_encap ip_tunnel_encap
3f3b76f9 GR	16
	17	#ifndef HAVE_IP_TUNNEL_INFO_OPTS_SET_FLAGS
	18	static inline void rpl_ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
	19	const void *from, int len,
	20	__be16 flags)
	21	{
	22	memcpy(ip_tunnel_info_opts(info), from, len);
	23	info->options_len = len;
	24	info->key.tun_flags \|= flags;
	25	}
	26
	27	#define ip_tunnel_info_opts_set rpl_ip_tunnel_info_opts_set
	28	#endif
	29
	30	#else /* USE_UPSTREAM_TUNNEL */
f6a0c895	31
5ebaf571	32	#include <linux/if_tunnel.h>
5ebaf571 PS	33	#include <linux/types.h>
5ebaf571 PS	34	#include <net/dsfield.h>
f2252c61	35	#include <net/dst_cache.h>
5ebaf571 PS	36	#include <net/flow.h>
	37	#include <net/inet_ecn.h>
	38	#include <net/ip.h>
	39	#include <net/rtnetlink.h>
8e53509c WT	40	#include <net/gro_cells.h>
	41
	42	#ifndef MAX_IPTUN_ENCAP_OPS
	43	#define MAX_IPTUN_ENCAP_OPS 8
	44	#endif
	45
	46	#ifndef HAVE_TUNNEL_ENCAP_TYPES
	47	enum tunnel_encap_types {
	48	TUNNEL_ENCAP_NONE,
	49	TUNNEL_ENCAP_FOU,
	50	TUNNEL_ENCAP_GUE,
	51	};
	52
	53	#define HAVE_TUNNEL_ENCAP_TYPES 1
	54	#endif
5ebaf571	55
c6e13fcc PS	56	#define __iptunnel_pull_header rpl___iptunnel_pull_header
	57	int rpl___iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
	58	__be16 inner_proto, bool raw_proto, bool xnet);
	59
	60	#define iptunnel_pull_header rpl_iptunnel_pull_header
	61	static inline int rpl_iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
	62	__be16 inner_proto, bool xnet)
	63	{
	64	return rpl___iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet);
	65	}
c6e13fcc	66
cf5789aa	67	int ovs_iptunnel_handle_offloads(struct sk_buff *skb,
2a94b571	68	int gso_type_mask,
cf5789aa PS	69	void (fix_segment)(struct sk_buff ));
cf5789aa PS	70
bae2b2d9	71	/* This is required to compile upstream gre.h. gre_handle_offloads()
cf5789aa PS	72	* is defined in gre.h and needs iptunnel_handle_offloads(). This provides
	73	* default signature for this function.
	74	* rpl prefix is to make OVS build happy.
	75	*/
	76	#define iptunnel_handle_offloads rpl_iptunnel_handle_offloads
436d36db	77	#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)
cf5789aa	78	struct sk_buff rpl_iptunnel_handle_offloads(struct sk_buff skb,
8e53509c WT	79	bool csum_help,
8e53509c WT	80	int gso_type_mask);
436d36db GR	81	#else
	82	int rpl_iptunnel_handle_offloads(struct sk_buff *skb,
	83	bool csum_help,
	84	int gso_type_mask);
	85	#endif
9ffdbf41 JG	86
9ffdbf41 JG	87	#define iptunnel_xmit rpl_iptunnel_xmit
43dd2fce PS	88	void rpl_iptunnel_xmit(struct sock sk, struct rtable rt, struct sk_buff *skb,
	89	__be32 src, __be32 dst, __u8 proto, __u8 tos, __u8 ttl,
	90	__be16 df, bool xnet);
8e53509c WT	91	#define ip_tunnel_xmit rpl_ip_tunnel_xmit
	92	void rpl_ip_tunnel_xmit(struct sk_buff skb, struct net_device dev,
	93	const struct iphdr *tnl_params, const u8 protocol);
	94
9ffdbf41	95
9ffdbf41	96	#ifndef TUNNEL_CSUM
5bff8644 WT	97	#define TUNNEL_CSUM __cpu_to_be16(0x01)
	98	#define TUNNEL_ROUTING __cpu_to_be16(0x02)
	99	#define TUNNEL_KEY __cpu_to_be16(0x04)
	100	#define TUNNEL_SEQ __cpu_to_be16(0x08)
	101	#define TUNNEL_STRICT __cpu_to_be16(0x10)
	102	#define TUNNEL_REC __cpu_to_be16(0x20)
	103	#define TUNNEL_VERSION __cpu_to_be16(0x40)
	104	#define TUNNEL_NO_KEY __cpu_to_be16(0x80)
	105	#define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100)
	106	#define TUNNEL_OAM __cpu_to_be16(0x0200)
	107	#define TUNNEL_CRIT_OPT __cpu_to_be16(0x0400)
	108	#define TUNNEL_GENEVE_OPT __cpu_to_be16(0x0800)
	109	#define TUNNEL_VXLAN_OPT __cpu_to_be16(0x1000)
	110	#define TUNNEL_NOCACHE __cpu_to_be16(0x2000)
	111	#define TUNNEL_ERSPAN_OPT __cpu_to_be16(0x4000)
	112
	113	#undef TUNNEL_OPTIONS_PRESENT
	114	#define TUNNEL_OPTIONS_PRESENT \
	115	(TUNNEL_GENEVE_OPT \| TUNNEL_VXLAN_OPT \| TUNNEL_ERSPAN_OPT)
5ebaf571 PS	116
	117	struct tnl_ptk_info {
	118	__be16 flags;
	119	__be16 proto;
	120	__be32 key;
	121	__be32 seq;
8e53509c	122	int hdr_len;
5ebaf571 PS	123	};
	124
	125	#define PACKET_RCVD 0
	126	#define PACKET_REJECT 1
8e53509c	127	#define PACKET_NEXT 2
9ffdbf41	128	#endif
5ebaf571	129
8e53509c WT	130	#define IP_TNL_HASH_BITS 7
	131	#define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS)
	132
8e53509c WT	133	/* Keep error state on tunnel for 30 sec */
	134	#define IPTUNNEL_ERR_TIMEO (30*HZ)
	135
e23775f2 PS	136	/* Used to memset ip_tunnel padding. */
	137	#define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst)
	138
	139	/* Used to memset ipv4 address padding. */
	140	#define IP_TUNNEL_KEY_IPV4_PAD offsetofend(struct ip_tunnel_key, u.ipv4.dst)
	141	#define IP_TUNNEL_KEY_IPV4_PAD_LEN \
	142	(FIELD_SIZEOF(struct ip_tunnel_key, u) - \
	143	FIELD_SIZEOF(struct ip_tunnel_key, u.ipv4))
	144
	145	struct ip_tunnel_key {
	146	__be64 tun_id;
	147	union {
	148	struct {
	149	__be32 src;
	150	__be32 dst;
	151	} ipv4;
	152	struct {
	153	struct in6_addr src;
	154	struct in6_addr dst;
	155	} ipv6;
	156	} u;
	157	__be16 tun_flags;
	158	u8 tos; /* TOS for IPv4, TC for IPv6 */
	159	u8 ttl; /* TTL for IPv4, HL for IPv6 */
3259c4ff	160	__be32 label; /* Flow Label for IPv6 */
e23775f2 PS	161	__be16 tp_src;
	162	__be16 tp_dst;
	163	};
	164
	165	/* Flags for ip_tunnel_info mode. */
	166	#define IP_TUNNEL_INFO_TX 0x01 /* represents tx tunnel parameters */
	167	#define IP_TUNNEL_INFO_IPV6 0x02 /* key contains IPv6 addresses */
	168
	169	struct ip_tunnel_info {
	170	struct ip_tunnel_key key;
f2252c61	171	struct dst_cache dst_cache;
e23775f2 PS	172	u8 options_len;
	173	u8 mode;
	174	};
	175
8e53509c WT	176	/* 6rd prefix/relay information */
	177	#ifdef CONFIG_IPV6_SIT_6RD
	178	struct ip_tunnel_6rd_parm {
	179	struct in6_addr prefix;
	180	__be32 relay_prefix;
	181	u16 prefixlen;
	182	u16 relay_prefixlen;
	183	};
	184	#endif
	185
	186	struct ip_tunnel_encap {
	187	u16 type;
	188	u16 flags;
	189	__be16 sport;
	190	__be16 dport;
	191	};
	192
	193	struct ip_tunnel_prl_entry {
	194	struct ip_tunnel_prl_entry __rcu *next;
	195	__be32 addr;
	196	u16 flags;
	197	struct rcu_head rcu_head;
	198	};
	199
e23775f2 PS	200	static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info *tun_info)
	201	{
	202	return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET;
	203	}
	204
	205	static inline void ip_tunnel_info_opts(struct ip_tunnel_info info)
	206	{
	207	return info + 1;
	208	}
	209
	210	static inline void ip_tunnel_info_opts_get(void *to,
	211	const struct ip_tunnel_info *info)
	212	{
	213	memcpy(to, info + 1, info->options_len);
	214	}
	215
	216	static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
	217	const void *from, int len)
	218	{
	219	memcpy(ip_tunnel_info_opts(info), from, len);
	220	info->options_len = len;
	221	}
	222
	223	static inline void ip_tunnel_key_init(struct ip_tunnel_key *key,
	224	__be32 saddr, __be32 daddr,
3259c4ff	225	u8 tos, u8 ttl, __be32 label,
e23775f2 PS	226	__be16 tp_src, __be16 tp_dst,
	227	__be64 tun_id, __be16 tun_flags)
	228	{
	229	key->tun_id = tun_id;
	230	key->u.ipv4.src = saddr;
	231	key->u.ipv4.dst = daddr;
	232	memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD,
	233	0, IP_TUNNEL_KEY_IPV4_PAD_LEN);
	234	key->tos = tos;
	235	key->ttl = ttl;
3259c4ff	236	key->label = label;
e23775f2 PS	237	key->tun_flags = tun_flags;
	238
	239	/* For the tunnel types on the top of IPsec, the tp_src and tp_dst of
	240	* the upper tunnel are used.
	241	* E.g: GRE over IPSEC, the tp_src and tp_port are zero.
	242	*/
	243	key->tp_src = tp_src;
	244	key->tp_dst = tp_dst;
	245
	246	/* Clear struct padding. */
	247	if (sizeof(*key) != IP_TUNNEL_KEY_SIZE)
	248	memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE,
	249	0, sizeof(*key) - IP_TUNNEL_KEY_SIZE);
	250	}
	251
	252	#define ip_tunnel_collect_metadata() true
	253
5bff8644	254	#undef TUNNEL_NOCACHE
e02c0ed7 PS	255	#define TUNNEL_NOCACHE 0
	256
	257	static inline bool
	258	ip_tunnel_dst_cache_usable(const struct sk_buff *skb,
	259	const struct ip_tunnel_info *info)
	260	{
	261	if (skb->mark)
	262	return false;
	263	if (!info)
	264	return true;
	265	if (info->key.tun_flags & TUNNEL_NOCACHE)
	266	return false;
	267
	268	return true;
	269	}
e02c0ed7	270
8e53509c WT	271	#define ip_tunnel_dst rpl_ip_tunnel_dst
	272	struct rpl_ip_tunnel_dst {
	273	struct dst_entry __rcu *dst;
	274	__be32 saddr;
	275	};
e23775f2	276
8e53509c	277	#define ip_tunnel rpl_ip_tunnel
e4120b10	278	struct rpl_ip_tunnel {
8e53509c WT	279	struct ip_tunnel __rcu *next;
8e53509c WT	280	struct hlist_node hash_node;
e23775f2 PS	281	struct net_device *dev;
	282	struct net net; / netns for packet i/o */
	283
e23775f2	284	unsigned long err_time; /* Time when the last ICMP error
8e53509c WT	285	* arrived */
8e53509c WT	286	int err_count; /* Number of arrived ICMP errors */
e23775f2 PS	287
	288	/* These four fields used only by GRE */
	289	u32 i_seqno; /* The last seen seqno */
	290	u32 o_seqno; /* The last output seqno */
	291	int tun_hlen; /* Precalculated header length */
8e53509c WT	292
	293	/* These four fields used only by ERSPAN */
	294	u32 index; /* ERSPAN type II index */
	295	u8 erspan_ver; /* ERSPAN version */
	296	u8 dir; /* ERSPAN direction */
	297	u16 hwid; /* ERSPAN hardware ID */
	298
	299	struct dst_cache dst_cache;
e23775f2 PS	300
	301	struct ip_tunnel_parm parms;
	302
8e53509c	303	int mlink;
e23775f2 PS	304	int encap_hlen; /* Encap header length (FOU,GUE) */
e23775f2 PS	305	int hlen; /* tun_hlen + encap_hlen */
8e53509c	306	struct ip_tunnel_encap encap;
e23775f2	307
8e53509c WT	308	/* for SIT */
	309	#ifdef CONFIG_IPV6_SIT_6RD
	310	struct ip_tunnel_6rd_parm ip6rd;
	311	#endif
	312	struct ip_tunnel_prl_entry __rcu prl; / potential router list */
	313	unsigned int prl_count; /* # of entries in PRL */
	314	unsigned int ip_tnl_net_id;
	315	struct gro_cells gro_cells;
	316	__u32 fwmark;
	317	bool collect_md;
	318	bool ignore_df;
e23775f2 PS	319	};
	320
	321	#define ip_tunnel_net rpl_ip_tunnel_net
e4120b10	322	struct rpl_ip_tunnel_net {
8e53509c WT	323	struct net_device *fb_tunnel_dev;
8e53509c WT	324	struct hlist_head tunnels[IP_TNL_HASH_SIZE];
e23775f2	325	struct ip_tunnel __rcu *collect_md_tun;
e23775f2 PS	326	};
	327
	328
8e53509c WT	329	struct ip_tunnel_encap_ops {
	330	size_t (encap_hlen)(struct ip_tunnel_encap e);
	331	int (build_header)(struct sk_buff skb, struct ip_tunnel_encap *e,
	332	const u8 protocol, struct flowi4 fl4);
	333	};
	334
	335	extern const struct ip_tunnel_encap_ops __rcu *
	336	rpl_iptun_encaps[MAX_IPTUN_ENCAP_OPS];
	337
	338	#define ip_encap_hlen rpl_ip_encap_hlen
	339	static inline int rpl_ip_encap_hlen(struct ip_tunnel_encap *e)
	340	{
	341	const struct ip_tunnel_encap_ops *ops;
	342	int hlen = -EINVAL;
	343
	344	if (e->type == TUNNEL_ENCAP_NONE)
	345	return 0;
	346
	347	if (e->type >= MAX_IPTUN_ENCAP_OPS)
	348	return -EINVAL;
	349
	350	rcu_read_lock();
	351	ops = rcu_dereference(rpl_iptun_encaps[e->type]);
	352	if (likely(ops && ops->encap_hlen))
	353	hlen = ops->encap_hlen(e);
	354	rcu_read_unlock();
	355
	356	return hlen;
	357	}
	358
	359	static inline int ovs_ip_tunnel_encap(struct sk_buff skb, struct ip_tunnel t,
	360	const u8 protocol, struct flowi4 fl4)
	361	{
	362	const struct ip_tunnel_encap_ops *ops;
	363	int ret = -EINVAL;
	364
	365	if (t->encap.type == TUNNEL_ENCAP_NONE)
	366	return 0;
	367
	368	if (t->encap.type >= MAX_IPTUN_ENCAP_OPS)
	369	return -EINVAL;
	370
	371	rcu_read_lock();
	372	ops = rcu_dereference(rpl_iptun_encaps[t->encap.type]);
	373	if (likely(ops && ops->build_header))
	374	ret = ops->build_header(skb, &t->encap, protocol, fl4);
	375	rcu_read_unlock();
	376
	377	return ret;
	378	}
	379
e23775f2	380	#define ip_tunnel_get_stats64 rpl_ip_tunnel_get_stats64
44a629b5	381	#if !defined(HAVE_VOID_NDO_GET_STATS64) && !defined(HAVE_RHEL7_MAX_MTU)
e23775f2 PS	382	struct rtnl_link_stats64 rpl_ip_tunnel_get_stats64(struct net_device dev,
e23775f2 PS	383	struct rtnl_link_stats64 *tot);
436d36db GR	384	#else
	385	void rpl_ip_tunnel_get_stats64(struct net_device *dev,
	386	struct rtnl_link_stats64 *tot);
	387	#endif
e23775f2	388	#define ip_tunnel_get_dsfield rpl_ip_tunnel_get_dsfield
e4120b10 WT	389	static inline u8 rpl_ip_tunnel_get_dsfield(const struct iphdr *iph,
e4120b10 WT	390	const struct sk_buff *skb)
e23775f2 PS	391	{
	392	if (skb->protocol == htons(ETH_P_IP))
	393	return iph->tos;
	394	else if (skb->protocol == htons(ETH_P_IPV6))
	395	return ipv6_get_dsfield((const struct ipv6hdr *)iph);
	396	else
	397	return 0;
	398	}
	399
	400	#define ip_tunnel_ecn_encap rpl_ip_tunnel_ecn_encap
e4120b10	401	static inline u8 rpl_ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph,
e23775f2 PS	402	const struct sk_buff *skb)
	403	{
	404	u8 inner = ip_tunnel_get_dsfield(iph, skb);
	405
	406	return INET_ECN_encapsulate(tos, inner);
	407	}
	408
43dd2fce	409	static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len)
e23775f2	410	{
43dd2fce PS	411	if (pkt_len > 0) {
43dd2fce PS	412	struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats);
e23775f2 PS	413
e23775f2 PS	414	u64_stats_update_begin(&tstats->syncp);
43dd2fce	415	tstats->tx_bytes += pkt_len;
e23775f2 PS	416	tstats->tx_packets++;
e23775f2 PS	417	u64_stats_update_end(&tstats->syncp);
43dd2fce	418	put_cpu_ptr(tstats);
e23775f2	419	} else {
43dd2fce PS	420	struct net_device_stats *err_stats = &dev->stats;
	421
	422	if (pkt_len < 0) {
	423	err_stats->tx_errors++;
	424	err_stats->tx_aborted_errors++;
	425	} else {
	426	err_stats->tx_dropped++;
	427	}
e23775f2 PS	428	}
e23775f2 PS	429	}
e23775f2	430
5bff8644 WT	431	static inline __be64 key32_to_tunnel_id(__be32 key)
	432	{
	433	#ifdef __BIG_ENDIAN
	434	return (__force __be64)key;
	435	#else
	436	return (__force __be64)((__force u64)key << 32);
	437	#endif
	438	}
	439
	440	/* Returns the least-significant 32 bits of a __be64. */
	441	static inline __be32 tunnel_id_to_key32(__be64 tun_id)
	442	{
	443	#ifdef __BIG_ENDIAN
	444	return (__force __be32)tun_id;
	445	#else
	446	return (__force __be32)((__force u64)tun_id >> 32);
	447	#endif
	448	}
	449
e23775f2 PS	450	#define ip_tunnel_init rpl_ip_tunnel_init
	451	int rpl_ip_tunnel_init(struct net_device *dev);
	452
	453	#define ip_tunnel_uninit rpl_ip_tunnel_uninit
	454	void rpl_ip_tunnel_uninit(struct net_device *dev);
	455
	456	#define ip_tunnel_change_mtu rpl_ip_tunnel_change_mtu
	457	int rpl_ip_tunnel_change_mtu(struct net_device *dev, int new_mtu);
	458
	459	#define ip_tunnel_newlink rpl_ip_tunnel_newlink
	460	int rpl_ip_tunnel_newlink(struct net_device dev, struct nlattr tb[],
	461	struct ip_tunnel_parm *p);
	462
	463	#define ip_tunnel_dellink rpl_ip_tunnel_dellink
e23775f2	464	void rpl_ip_tunnel_dellink(struct net_device dev, struct list_head head);
e23775f2 PS	465
	466	#define ip_tunnel_init_net rpl_ip_tunnel_init_net
	467	int rpl_ip_tunnel_init_net(struct net *net, int ip_tnl_net_id,
	468	struct rtnl_link_ops ops, char devname);
	469
	470	#define ip_tunnel_delete_net rpl_ip_tunnel_delete_net
	471	void rpl_ip_tunnel_delete_net(struct ip_tunnel_net itn, struct rtnl_link_ops ops);
	472
	473	#define ip_tunnel_setup rpl_ip_tunnel_setup
	474	void rpl_ip_tunnel_setup(struct net_device *dev, int net_id);
	475
00d662ba PS	476	#define ip_tunnel_get_iflink rpl_ip_tunnel_get_iflink
00d662ba PS	477	int rpl_ip_tunnel_get_iflink(const struct net_device *dev);
03469419 PS	478
	479	#define ip_tunnel_get_link_net rpl_ip_tunnel_get_link_net
	480	struct net rpl_ip_tunnel_get_link_net(const struct net_device dev);
06f1a61a	481
06f1a61a DW	482	#define __ip_tunnel_change_mtu rpl___ip_tunnel_change_mtu
06f1a61a DW	483	int rpl___ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict);
06f1a61a	484
8e53509c WT	485	#define ip_tunnel_lookup rpl_ip_tunnel_lookup
	486	struct ip_tunnel rpl_ip_tunnel_lookup(struct ip_tunnel_net itn,
	487	int link, __be16 flags,
	488	__be32 remote, __be32 local,
	489	__be32 key);
	490
5a109898 PS	491	static inline int iptunnel_pull_offloads(struct sk_buff *skb)
	492	{
	493	if (skb_is_gso(skb)) {
	494	int err;
	495
	496	err = skb_unclone(skb, GFP_ATOMIC);
	497	if (unlikely(err))
	498	return err;
	499	skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >>
	500	NETIF_F_GSO_SHIFT);
	501	}
	502
	503	skb->encapsulation = 0;
	504	return 0;
	505	}
e776e168	506	#endif /* USE_UPSTREAM_TUNNEL */
06aeda48 PS	507
	508	#define skb_is_encapsulated ovs_skb_is_encapsulated
	509	bool ovs_skb_is_encapsulated(struct sk_buff *skb);
	510
5ebaf571	511	#endif /* __NET_IP_TUNNELS_H */