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v4.6
  1#ifndef __NET_DST_METADATA_H
  2#define __NET_DST_METADATA_H 1
  3
  4#include <linux/skbuff.h>
  5#include <net/ip_tunnels.h>
  6#include <net/dst.h>
  7
  8struct metadata_dst {
  9	struct dst_entry		dst;
 10	union {
 11		struct ip_tunnel_info	tun_info;
 12	} u;
 13};
 14
 15static inline struct metadata_dst *skb_metadata_dst(struct sk_buff *skb)
 16{
 17	struct metadata_dst *md_dst = (struct metadata_dst *) skb_dst(skb);
 18
 19	if (md_dst && md_dst->dst.flags & DST_METADATA)
 20		return md_dst;
 21
 22	return NULL;
 23}
 24
 25static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb)
 26{
 27	struct metadata_dst *md_dst = skb_metadata_dst(skb);
 28	struct dst_entry *dst;
 29
 30	if (md_dst)
 31		return &md_dst->u.tun_info;
 32
 33	dst = skb_dst(skb);
 34	if (dst && dst->lwtstate)
 35		return lwt_tun_info(dst->lwtstate);
 36
 37	return NULL;
 38}
 39
 40static inline bool skb_valid_dst(const struct sk_buff *skb)
 41{
 42	struct dst_entry *dst = skb_dst(skb);
 43
 44	return dst && !(dst->flags & DST_METADATA);
 45}
 46
 47static inline int skb_metadata_dst_cmp(const struct sk_buff *skb_a,
 48				       const struct sk_buff *skb_b)
 49{
 50	const struct metadata_dst *a, *b;
 51
 52	if (!(skb_a->_skb_refdst | skb_b->_skb_refdst))
 53		return 0;
 54
 55	a = (const struct metadata_dst *) skb_dst(skb_a);
 56	b = (const struct metadata_dst *) skb_dst(skb_b);
 57
 58	if (!a != !b || a->u.tun_info.options_len != b->u.tun_info.options_len)
 59		return 1;
 60
 61	return memcmp(&a->u.tun_info, &b->u.tun_info,
 62		      sizeof(a->u.tun_info) + a->u.tun_info.options_len);
 63}
 64
 65void metadata_dst_free(struct metadata_dst *);
 66struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
 67struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags);
 68
 69static inline struct metadata_dst *tun_rx_dst(int md_size)
 70{
 71	struct metadata_dst *tun_dst;
 72
 73	tun_dst = metadata_dst_alloc(md_size, GFP_ATOMIC);
 74	if (!tun_dst)
 75		return NULL;
 76
 77	tun_dst->u.tun_info.options_len = 0;
 78	tun_dst->u.tun_info.mode = 0;
 79	return tun_dst;
 80}
 81
 82static inline struct metadata_dst *tun_dst_unclone(struct sk_buff *skb)
 83{
 84	struct metadata_dst *md_dst = skb_metadata_dst(skb);
 85	int md_size;
 86	struct metadata_dst *new_md;
 87
 88	if (!md_dst)
 89		return ERR_PTR(-EINVAL);
 90
 91	md_size = md_dst->u.tun_info.options_len;
 92	new_md = metadata_dst_alloc(md_size, GFP_ATOMIC);
 93	if (!new_md)
 94		return ERR_PTR(-ENOMEM);
 95
 96	memcpy(&new_md->u.tun_info, &md_dst->u.tun_info,
 97	       sizeof(struct ip_tunnel_info) + md_size);
 98	skb_dst_drop(skb);
 99	dst_hold(&new_md->dst);
100	skb_dst_set(skb, &new_md->dst);
101	return new_md;
102}
103
104static inline struct ip_tunnel_info *skb_tunnel_info_unclone(struct sk_buff *skb)
105{
106	struct metadata_dst *dst;
107
108	dst = tun_dst_unclone(skb);
109	if (IS_ERR(dst))
110		return NULL;
111
112	return &dst->u.tun_info;
113}
114
115static inline struct metadata_dst *ip_tun_rx_dst(struct sk_buff *skb,
116						 __be16 flags,
117						 __be64 tunnel_id,
118						 int md_size)
 
 
 
119{
120	const struct iphdr *iph = ip_hdr(skb);
121	struct metadata_dst *tun_dst;
122
123	tun_dst = tun_rx_dst(md_size);
124	if (!tun_dst)
125		return NULL;
126
127	ip_tunnel_key_init(&tun_dst->u.tun_info.key,
128			   iph->saddr, iph->daddr, iph->tos, iph->ttl,
129			   0, 0, 0, tunnel_id, flags);
130	return tun_dst;
131}
132
133static inline struct metadata_dst *ipv6_tun_rx_dst(struct sk_buff *skb,
134						 __be16 flags,
135						 __be64 tunnel_id,
136						 int md_size)
137{
138	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
139	struct metadata_dst *tun_dst;
140	struct ip_tunnel_info *info;
141
142	tun_dst = tun_rx_dst(md_size);
143	if (!tun_dst)
144		return NULL;
145
146	info = &tun_dst->u.tun_info;
147	info->mode = IP_TUNNEL_INFO_IPV6;
148	info->key.tun_flags = flags;
149	info->key.tun_id = tunnel_id;
150	info->key.tp_src = 0;
151	info->key.tp_dst = 0;
152
153	info->key.u.ipv6.src = ip6h->saddr;
154	info->key.u.ipv6.dst = ip6h->daddr;
155
156	info->key.tos = ipv6_get_dsfield(ip6h);
157	info->key.ttl = ip6h->hop_limit;
158	info->key.label = ip6_flowlabel(ip6h);
159
160	return tun_dst;
161}
162
 
 
 
 
 
 
 
 
 
 
 
 
163#endif /* __NET_DST_METADATA_H */
v4.10.11
  1#ifndef __NET_DST_METADATA_H
  2#define __NET_DST_METADATA_H 1
  3
  4#include <linux/skbuff.h>
  5#include <net/ip_tunnels.h>
  6#include <net/dst.h>
  7
  8struct metadata_dst {
  9	struct dst_entry		dst;
 10	union {
 11		struct ip_tunnel_info	tun_info;
 12	} u;
 13};
 14
 15static inline struct metadata_dst *skb_metadata_dst(struct sk_buff *skb)
 16{
 17	struct metadata_dst *md_dst = (struct metadata_dst *) skb_dst(skb);
 18
 19	if (md_dst && md_dst->dst.flags & DST_METADATA)
 20		return md_dst;
 21
 22	return NULL;
 23}
 24
 25static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb)
 26{
 27	struct metadata_dst *md_dst = skb_metadata_dst(skb);
 28	struct dst_entry *dst;
 29
 30	if (md_dst)
 31		return &md_dst->u.tun_info;
 32
 33	dst = skb_dst(skb);
 34	if (dst && dst->lwtstate)
 35		return lwt_tun_info(dst->lwtstate);
 36
 37	return NULL;
 38}
 39
 40static inline bool skb_valid_dst(const struct sk_buff *skb)
 41{
 42	struct dst_entry *dst = skb_dst(skb);
 43
 44	return dst && !(dst->flags & DST_METADATA);
 45}
 46
 47static inline int skb_metadata_dst_cmp(const struct sk_buff *skb_a,
 48				       const struct sk_buff *skb_b)
 49{
 50	const struct metadata_dst *a, *b;
 51
 52	if (!(skb_a->_skb_refdst | skb_b->_skb_refdst))
 53		return 0;
 54
 55	a = (const struct metadata_dst *) skb_dst(skb_a);
 56	b = (const struct metadata_dst *) skb_dst(skb_b);
 57
 58	if (!a != !b || a->u.tun_info.options_len != b->u.tun_info.options_len)
 59		return 1;
 60
 61	return memcmp(&a->u.tun_info, &b->u.tun_info,
 62		      sizeof(a->u.tun_info) + a->u.tun_info.options_len);
 63}
 64
 65void metadata_dst_free(struct metadata_dst *);
 66struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
 67struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags);
 68
 69static inline struct metadata_dst *tun_rx_dst(int md_size)
 70{
 71	struct metadata_dst *tun_dst;
 72
 73	tun_dst = metadata_dst_alloc(md_size, GFP_ATOMIC);
 74	if (!tun_dst)
 75		return NULL;
 76
 77	tun_dst->u.tun_info.options_len = 0;
 78	tun_dst->u.tun_info.mode = 0;
 79	return tun_dst;
 80}
 81
 82static inline struct metadata_dst *tun_dst_unclone(struct sk_buff *skb)
 83{
 84	struct metadata_dst *md_dst = skb_metadata_dst(skb);
 85	int md_size;
 86	struct metadata_dst *new_md;
 87
 88	if (!md_dst)
 89		return ERR_PTR(-EINVAL);
 90
 91	md_size = md_dst->u.tun_info.options_len;
 92	new_md = metadata_dst_alloc(md_size, GFP_ATOMIC);
 93	if (!new_md)
 94		return ERR_PTR(-ENOMEM);
 95
 96	memcpy(&new_md->u.tun_info, &md_dst->u.tun_info,
 97	       sizeof(struct ip_tunnel_info) + md_size);
 98	skb_dst_drop(skb);
 99	dst_hold(&new_md->dst);
100	skb_dst_set(skb, &new_md->dst);
101	return new_md;
102}
103
104static inline struct ip_tunnel_info *skb_tunnel_info_unclone(struct sk_buff *skb)
105{
106	struct metadata_dst *dst;
107
108	dst = tun_dst_unclone(skb);
109	if (IS_ERR(dst))
110		return NULL;
111
112	return &dst->u.tun_info;
113}
114
115static inline struct metadata_dst *__ip_tun_set_dst(__be32 saddr,
116						    __be32 daddr,
117						    __u8 tos, __u8 ttl,
118						    __be16 tp_dst,
119						    __be16 flags,
120						    __be64 tunnel_id,
121						    int md_size)
122{
 
123	struct metadata_dst *tun_dst;
124
125	tun_dst = tun_rx_dst(md_size);
126	if (!tun_dst)
127		return NULL;
128
129	ip_tunnel_key_init(&tun_dst->u.tun_info.key,
130			   saddr, daddr, tos, ttl,
131			   0, 0, tp_dst, tunnel_id, flags);
132	return tun_dst;
133}
134
135static inline struct metadata_dst *ip_tun_rx_dst(struct sk_buff *skb,
136						 __be16 flags,
137						 __be64 tunnel_id,
138						 int md_size)
139{
140	const struct iphdr *iph = ip_hdr(skb);
141
142	return __ip_tun_set_dst(iph->saddr, iph->daddr, iph->tos, iph->ttl,
143				0, flags, tunnel_id, md_size);
144}
145
146static inline struct metadata_dst *__ipv6_tun_set_dst(const struct in6_addr *saddr,
147						      const struct in6_addr *daddr,
148						      __u8 tos, __u8 ttl,
149						      __be16 tp_dst,
150						      __be32 label,
151						      __be16 flags,
152						      __be64 tunnel_id,
153						      int md_size)
154{
155	struct metadata_dst *tun_dst;
156	struct ip_tunnel_info *info;
157
158	tun_dst = tun_rx_dst(md_size);
159	if (!tun_dst)
160		return NULL;
161
162	info = &tun_dst->u.tun_info;
163	info->mode = IP_TUNNEL_INFO_IPV6;
164	info->key.tun_flags = flags;
165	info->key.tun_id = tunnel_id;
166	info->key.tp_src = 0;
167	info->key.tp_dst = tp_dst;
168
169	info->key.u.ipv6.src = *saddr;
170	info->key.u.ipv6.dst = *daddr;
171
172	info->key.tos = tos;
173	info->key.ttl = ttl;
174	info->key.label = label;
175
176	return tun_dst;
177}
178
179static inline struct metadata_dst *ipv6_tun_rx_dst(struct sk_buff *skb,
180						   __be16 flags,
181						   __be64 tunnel_id,
182						   int md_size)
183{
184	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
185
186	return __ipv6_tun_set_dst(&ip6h->saddr, &ip6h->daddr,
187				  ipv6_get_dsfield(ip6h), ip6h->hop_limit,
188				  0, ip6_flowlabel(ip6h), flags, tunnel_id,
189				  md_size);
190}
191#endif /* __NET_DST_METADATA_H */