[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
#else

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