mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 10:19:47 +00:00
![David S. Miller](/assets/img/avatar_default.png)
Files removed in 'net-next' had their license header updated in 'net'. We take the remove from 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
217 lines
5 KiB
C
217 lines
5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __NET_DST_METADATA_H
|
|
#define __NET_DST_METADATA_H 1
|
|
|
|
#include <linux/skbuff.h>
|
|
#include <net/ip_tunnels.h>
|
|
#include <net/dst.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;
|
|
};
|
|
|
|
static inline struct metadata_dst *skb_metadata_dst(const struct sk_buff *skb)
|
|
{
|
|
struct metadata_dst *md_dst = (struct metadata_dst *) skb_dst(skb);
|
|
|
|
if (md_dst && md_dst->dst.flags & DST_METADATA)
|
|
return md_dst;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct ip_tunnel_info *
|
|
skb_tunnel_info(const struct sk_buff *skb)
|
|
{
|
|
struct metadata_dst *md_dst = skb_metadata_dst(skb);
|
|
struct dst_entry *dst;
|
|
|
|
if (md_dst && md_dst->type == METADATA_IP_TUNNEL)
|
|
return &md_dst->u.tun_info;
|
|
|
|
dst = skb_dst(skb);
|
|
if (dst && dst->lwtstate)
|
|
return lwt_tun_info(dst->lwtstate);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool skb_valid_dst(const struct sk_buff *skb)
|
|
{
|
|
struct dst_entry *dst = skb_dst(skb);
|
|
|
|
return dst && !(dst->flags & DST_METADATA);
|
|
}
|
|
|
|
static inline int skb_metadata_dst_cmp(const struct sk_buff *skb_a,
|
|
const struct sk_buff *skb_b)
|
|
{
|
|
const struct metadata_dst *a, *b;
|
|
|
|
if (!(skb_a->_skb_refdst | skb_b->_skb_refdst))
|
|
return 0;
|
|
|
|
a = (const struct metadata_dst *) skb_dst(skb_a);
|
|
b = (const struct metadata_dst *) skb_dst(skb_b);
|
|
|
|
if (!a != !b || a->type != b->type)
|
|
return 1;
|
|
|
|
switch (a->type) {
|
|
case METADATA_HW_PORT_MUX:
|
|
return memcmp(&a->u.port_info, &b->u.port_info,
|
|
sizeof(a->u.port_info));
|
|
case METADATA_IP_TUNNEL:
|
|
return memcmp(&a->u.tun_info, &b->u.tun_info,
|
|
sizeof(a->u.tun_info) +
|
|
a->u.tun_info.options_len);
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
void metadata_dst_free(struct metadata_dst *);
|
|
struct metadata_dst *metadata_dst_alloc(u8 optslen, enum metadata_type type,
|
|
gfp_t flags);
|
|
void metadata_dst_free_percpu(struct metadata_dst __percpu *md_dst);
|
|
struct metadata_dst __percpu *
|
|
metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags);
|
|
|
|
static inline struct metadata_dst *tun_rx_dst(int md_size)
|
|
{
|
|
struct metadata_dst *tun_dst;
|
|
|
|
tun_dst = 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 *tun_dst_unclone(struct sk_buff *skb)
|
|
{
|
|
struct metadata_dst *md_dst = skb_metadata_dst(skb);
|
|
int md_size;
|
|
struct metadata_dst *new_md;
|
|
|
|
if (!md_dst || md_dst->type != METADATA_IP_TUNNEL)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
md_size = md_dst->u.tun_info.options_len;
|
|
new_md = metadata_dst_alloc(md_size, METADATA_IP_TUNNEL, GFP_ATOMIC);
|
|
if (!new_md)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
memcpy(&new_md->u.tun_info, &md_dst->u.tun_info,
|
|
sizeof(struct ip_tunnel_info) + md_size);
|
|
skb_dst_drop(skb);
|
|
dst_hold(&new_md->dst);
|
|
skb_dst_set(skb, &new_md->dst);
|
|
return new_md;
|
|
}
|
|
|
|
static inline struct ip_tunnel_info *skb_tunnel_info_unclone(struct sk_buff *skb)
|
|
{
|
|
struct metadata_dst *dst;
|
|
|
|
dst = tun_dst_unclone(skb);
|
|
if (IS_ERR(dst))
|
|
return NULL;
|
|
|
|
return &dst->u.tun_info;
|
|
}
|
|
|
|
static inline struct metadata_dst *__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 = 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 *ip_tun_rx_dst(struct sk_buff *skb,
|
|
__be16 flags,
|
|
__be64 tunnel_id,
|
|
int md_size)
|
|
{
|
|
const struct iphdr *iph = ip_hdr(skb);
|
|
|
|
return __ip_tun_set_dst(iph->saddr, iph->daddr, iph->tos, iph->ttl,
|
|
0, flags, tunnel_id, md_size);
|
|
}
|
|
|
|
static inline struct metadata_dst *__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 = 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 *ipv6_tun_rx_dst(struct sk_buff *skb,
|
|
__be16 flags,
|
|
__be64 tunnel_id,
|
|
int md_size)
|
|
{
|
|
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
|
|
|
|
return __ipv6_tun_set_dst(&ip6h->saddr, &ip6h->daddr,
|
|
ipv6_get_dsfield(ip6h), ip6h->hop_limit,
|
|
0, ip6_flowlabel(ip6h), flags, tunnel_id,
|
|
md_size);
|
|
}
|
|
#endif /* __NET_DST_METADATA_H */
|