fc4099f172
While transitioning to netdev based vport we broke OVS
feature which allows user to retrieve tunnel packet egress
information for lwtunnel devices. Following patch fixes it
by introducing ndo operation to get the tunnel egress info.
Same ndo operation can be used for lwtunnel devices and compat
ovs-tnl-vport devices. So after adding such device operation
we can remove similar operation from ovs-vport.
Fixes: 614732eaa1 ("openvswitch: Use regular VXLAN net_device device").
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
140 lines
3.1 KiB
C
140 lines
3.1 KiB
C
#ifndef __NET_DST_METADATA_H
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#define __NET_DST_METADATA_H 1
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#include <linux/skbuff.h>
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#include <net/ip_tunnels.h>
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#include <net/dst.h>
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struct metadata_dst {
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struct dst_entry dst;
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union {
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struct ip_tunnel_info tun_info;
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} u;
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};
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static inline struct metadata_dst *skb_metadata_dst(struct sk_buff *skb)
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{
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struct metadata_dst *md_dst = (struct metadata_dst *) skb_dst(skb);
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if (md_dst && md_dst->dst.flags & DST_METADATA)
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return md_dst;
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return NULL;
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}
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static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb)
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{
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struct metadata_dst *md_dst = skb_metadata_dst(skb);
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struct dst_entry *dst;
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if (md_dst)
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return &md_dst->u.tun_info;
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dst = skb_dst(skb);
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if (dst && dst->lwtstate)
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return lwt_tun_info(dst->lwtstate);
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return NULL;
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}
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static inline bool skb_valid_dst(const struct sk_buff *skb)
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{
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struct dst_entry *dst = skb_dst(skb);
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return dst && !(dst->flags & DST_METADATA);
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}
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struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
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struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags);
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static inline struct metadata_dst *tun_rx_dst(int md_size)
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{
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struct metadata_dst *tun_dst;
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tun_dst = metadata_dst_alloc(md_size, GFP_ATOMIC);
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if (!tun_dst)
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return NULL;
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tun_dst->u.tun_info.options_len = 0;
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tun_dst->u.tun_info.mode = 0;
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return tun_dst;
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}
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static inline struct metadata_dst *tun_dst_unclone(struct sk_buff *skb)
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{
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struct metadata_dst *md_dst = skb_metadata_dst(skb);
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int md_size = md_dst->u.tun_info.options_len;
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struct metadata_dst *new_md;
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if (!md_dst)
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return ERR_PTR(-EINVAL);
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new_md = metadata_dst_alloc(md_size, GFP_ATOMIC);
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if (!new_md)
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return ERR_PTR(-ENOMEM);
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memcpy(&new_md->u.tun_info, &md_dst->u.tun_info,
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sizeof(struct ip_tunnel_info) + md_size);
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skb_dst_drop(skb);
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dst_hold(&new_md->dst);
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skb_dst_set(skb, &new_md->dst);
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return new_md;
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}
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static inline struct ip_tunnel_info *skb_tunnel_info_unclone(struct sk_buff *skb)
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{
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struct metadata_dst *dst;
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dst = tun_dst_unclone(skb);
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if (IS_ERR(dst))
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return NULL;
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return &dst->u.tun_info;
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}
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static inline struct metadata_dst *ip_tun_rx_dst(struct sk_buff *skb,
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__be16 flags,
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__be64 tunnel_id,
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int md_size)
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{
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const struct iphdr *iph = ip_hdr(skb);
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struct metadata_dst *tun_dst;
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tun_dst = tun_rx_dst(md_size);
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if (!tun_dst)
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return NULL;
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ip_tunnel_key_init(&tun_dst->u.tun_info.key,
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iph->saddr, iph->daddr, iph->tos, iph->ttl,
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0, 0, tunnel_id, flags);
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return tun_dst;
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}
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static inline struct metadata_dst *ipv6_tun_rx_dst(struct sk_buff *skb,
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__be16 flags,
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__be64 tunnel_id,
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int md_size)
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{
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const struct ipv6hdr *ip6h = ipv6_hdr(skb);
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struct metadata_dst *tun_dst;
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struct ip_tunnel_info *info;
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tun_dst = tun_rx_dst(md_size);
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if (!tun_dst)
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return NULL;
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info = &tun_dst->u.tun_info;
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info->mode = IP_TUNNEL_INFO_IPV6;
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info->key.tun_flags = flags;
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info->key.tun_id = tunnel_id;
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info->key.tp_src = 0;
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info->key.tp_dst = 0;
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info->key.u.ipv6.src = ip6h->saddr;
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info->key.u.ipv6.dst = ip6h->daddr;
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info->key.tos = ipv6_get_dsfield(ip6h);
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info->key.ttl = ip6h->hop_limit;
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return tun_dst;
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}
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#endif /* __NET_DST_METADATA_H */
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