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#ifndef __NET_DST_METADATA_WRAPPER_H
#define __NET_DST_METADATA_WRAPPER_H 1
#ifdef USE_UPSTREAM_TUNNEL
#include_next <net/dst_metadata.h>
#else
#include <linux/skbuff.h>
#include <net/dsfield.h>
#include <net/dst.h>
#include <net/ipv6.h>
#include <net/ip_tunnels.h>
enum metadata_type {
METADATA_IP_TUNNEL,
METADATA_HW_PORT_MUX,
};
struct hw_port_info {
struct net_device *lower_dev;
u32 port_id;
};
struct metadata_dst {
struct dst_entry dst;
enum metadata_type type;
union {
struct ip_tunnel_info tun_info;
struct hw_port_info port_info;
} u;
};
#ifndef DST_METADATA
#define DST_METADATA 0x0080
#endif
extern struct dst_ops md_dst_ops;
static void rpl__metadata_dst_init(struct metadata_dst *md_dst,
enum metadata_type type, u8 optslen)
{
struct dst_entry *dst;
dst = &md_dst->dst;
dst_init(dst, &md_dst_ops, NULL, 1, DST_OBSOLETE_NONE,
DST_METADATA | DST_NOCOUNT);
#if 0
/* unused in OVS */
dst->input = dst_md_discard;
dst->output = dst_md_discard_out;
#endif
memset(dst + 1, 0, sizeof(*md_dst) + optslen - sizeof(*dst));
md_dst->type = type;
}
static struct
metadata_dst *__rpl_metadata_dst_alloc(u8 optslen,
enum metadata_type type,
gfp_t flags)
{
struct metadata_dst *md_dst;
md_dst = kmalloc(sizeof(*md_dst) + optslen, flags);
if (!md_dst)
return NULL;
rpl__metadata_dst_init(md_dst, type, optslen);
return md_dst;
}
static inline struct metadata_dst *rpl_tun_rx_dst(int md_size)
{
struct metadata_dst *tun_dst;
tun_dst = __rpl_metadata_dst_alloc(md_size, METADATA_IP_TUNNEL,
GFP_ATOMIC);
if (!tun_dst)
return NULL;
tun_dst->u.tun_info.options_len = 0;
tun_dst->u.tun_info.mode = 0;
return tun_dst;
}
static inline struct metadata_dst *rpl__ip_tun_set_dst(__be32 saddr,
__be32 daddr,
__u8 tos, __u8 ttl,
__be16 tp_dst,
__be16 flags,
__be64 tunnel_id,
int md_size)
{
struct metadata_dst *tun_dst;
tun_dst = rpl_tun_rx_dst(md_size);
if (!tun_dst)
return NULL;
ip_tunnel_key_init(&tun_dst->u.tun_info.key,
saddr, daddr, tos, ttl,
0, 0, tp_dst, tunnel_id, flags);
return tun_dst;
}
static inline struct metadata_dst *rpl_ip_tun_rx_dst(struct sk_buff *skb,
__be16 flags,
__be64 tunnel_id,
int md_size)
{
const struct iphdr *iph = ip_hdr(skb);
return rpl__ip_tun_set_dst(iph->saddr, iph->daddr, iph->tos, iph->ttl,
0, flags, tunnel_id, md_size);
}
static inline
struct metadata_dst *rpl__ipv6_tun_set_dst(const struct in6_addr *saddr,
const struct in6_addr *daddr,
__u8 tos, __u8 ttl,
__be16 tp_dst,
__be32 label,
__be16 flags,
__be64 tunnel_id,
int md_size)
{
struct metadata_dst *tun_dst;
struct ip_tunnel_info *info;
tun_dst = rpl_tun_rx_dst(md_size);
if (!tun_dst)
return NULL;
info = &tun_dst->u.tun_info;
info->mode = IP_TUNNEL_INFO_IPV6;
info->key.tun_flags = flags;
info->key.tun_id = tunnel_id;
info->key.tp_src = 0;
info->key.tp_dst = tp_dst;
info->key.u.ipv6.src = *saddr;
info->key.u.ipv6.dst = *daddr;
info->key.tos = tos;
info->key.ttl = ttl;
info->key.label = label;
return tun_dst;
}
static inline struct metadata_dst *rpl_ipv6_tun_rx_dst(struct sk_buff *skb,
__be16 flags,
__be64 tunnel_id,
int md_size)
{
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
return rpl__ipv6_tun_set_dst(&ip6h->saddr, &ip6h->daddr,
ipv6_get_dsfield(ip6h), ip6h->hop_limit,
0, ip6_flowlabel(ip6h), flags, tunnel_id,
md_size);
}
static void __metadata_dst_init(struct metadata_dst *md_dst, u8 optslen)
{
struct dst_entry *dst;
dst = &md_dst->dst;
#if 0
dst_init(dst, &md_dst_ops, NULL, 1, DST_OBSOLETE_NONE,
DST_METADATA | DST_NOCACHE | DST_NOCOUNT);
dst->input = dst_md_discard;
dst->output = dst_md_discard_out;
#endif
memset(dst + 1, 0, sizeof(*md_dst) + optslen - sizeof(*dst));
}
static inline struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags)
{
struct metadata_dst *md_dst;
md_dst = kmalloc(sizeof(*md_dst) + optslen, flags);
if (!md_dst)
return NULL;
__metadata_dst_init(md_dst, optslen);
return md_dst;
}
#define skb_tunnel_info ovs_skb_tunnel_info
static inline void ovs_tun_rx_dst(struct metadata_dst *md_dst, int optslen)
{
/* No need to allocate for OVS backport case. */
#if 0
struct metadata_dst *tun_dst;
struct ip_tunnel_info *info;
tun_dst = metadata_dst_alloc(md_size, GFP_ATOMIC);
if (!tun_dst)
return NULL;
#endif
__metadata_dst_init(md_dst, optslen);
}
static inline void ovs_ip_tun_rx_dst(struct metadata_dst *md_dst,
struct sk_buff *skb, __be16 flags,
__be64 tunnel_id, int md_size)
{
const struct iphdr *iph = ip_hdr(skb);
ovs_tun_rx_dst(md_dst, md_size);
ip_tunnel_key_init(&md_dst->u.tun_info.key,
iph->saddr, iph->daddr, iph->tos, iph->ttl, 0,
0, 0, tunnel_id, flags);
}
static inline void ovs_ipv6_tun_rx_dst(struct metadata_dst *md_dst,
struct sk_buff *skb,
__be16 flags,
__be64 tunnel_id,
int md_size)
{
struct ip_tunnel_info *info = &md_dst->u.tun_info;
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
ovs_tun_rx_dst(md_dst, md_size);
info->mode = IP_TUNNEL_INFO_IPV6;
info->key.tun_flags = flags;
info->key.tun_id = tunnel_id;
info->key.tp_src = 0;
info->key.tp_dst = 0;
info->key.u.ipv6.src = ip6h->saddr;
info->key.u.ipv6.dst = ip6h->daddr;
info->key.tos = ipv6_get_dsfield(ip6h);
info->key.ttl = ip6h->hop_limit;
info->key.label = ip6_flowlabel(ip6h);
}
#endif /* USE_UPSTREAM_TUNNEL */
void ovs_ip_tunnel_rcv(struct net_device *dev, struct sk_buff *skb,
struct metadata_dst *tun_dst);
static inline struct metadata_dst *
rpl_metadata_dst_alloc(u8 optslen, enum metadata_type type, gfp_t flags)
{
#if defined(HAVE_METADATA_DST_ALLOC_WITH_METADATA_TYPE) && defined(USE_UPSTREAM_TUNNEL)
return metadata_dst_alloc(optslen, type, flags);
#else
return metadata_dst_alloc(optslen, flags);
#endif
}
#define metadata_dst_alloc rpl_metadata_dst_alloc
static inline bool rpl_skb_valid_dst(const struct sk_buff *skb)
{
struct dst_entry *dst = skb_dst(skb);
return dst && !(dst->flags & DST_METADATA);
}
#define skb_valid_dst rpl_skb_valid_dst
#endif /* __NET_DST_METADATA_WRAPPER_H */
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