forked from luck/tmp_suning_uos_patched
7c383fb225
Rename the ipv4_tos and ipv4_ttl fields to just 'tos' and 'ttl', as they'll be used with IPv6 tunnels, too. Signed-off-by: Jiri Benc <jbenc@redhat.com> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
356 lines
9.6 KiB
C
356 lines
9.6 KiB
C
#ifndef __NET_IP_TUNNELS_H
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#define __NET_IP_TUNNELS_H 1
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#include <linux/if_tunnel.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <linux/types.h>
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#include <linux/u64_stats_sync.h>
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#include <net/dsfield.h>
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#include <net/gro_cells.h>
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#include <net/inet_ecn.h>
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#include <net/netns/generic.h>
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#include <net/rtnetlink.h>
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#include <net/lwtunnel.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <net/ipv6.h>
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#include <net/ip6_fib.h>
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#include <net/ip6_route.h>
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#endif
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/* Keep error state on tunnel for 30 sec */
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#define IPTUNNEL_ERR_TIMEO (30*HZ)
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/* Used to memset ip_tunnel padding. */
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#define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst)
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/* Used to memset ipv4 address padding. */
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#define IP_TUNNEL_KEY_IPV4_PAD offsetofend(struct ip_tunnel_key, u.ipv4.dst)
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#define IP_TUNNEL_KEY_IPV4_PAD_LEN \
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(FIELD_SIZEOF(struct ip_tunnel_key, u) - \
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FIELD_SIZEOF(struct ip_tunnel_key, u.ipv4))
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struct ip_tunnel_key {
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__be64 tun_id;
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union {
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struct {
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__be32 src;
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__be32 dst;
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} ipv4;
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struct {
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struct in6_addr src;
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struct in6_addr dst;
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} ipv6;
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} u;
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__be16 tun_flags;
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u8 tos; /* TOS for IPv4, TC for IPv6 */
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u8 ttl; /* TTL for IPv4, HL for IPv6 */
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__be16 tp_src;
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__be16 tp_dst;
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};
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/* Indicates whether the tunnel info structure represents receive
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* or transmit tunnel parameters.
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*/
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enum {
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IP_TUNNEL_INFO_RX,
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IP_TUNNEL_INFO_TX,
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};
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struct ip_tunnel_info {
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struct ip_tunnel_key key;
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const void *options;
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u8 options_len;
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u8 mode;
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};
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/* 6rd prefix/relay information */
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#ifdef CONFIG_IPV6_SIT_6RD
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struct ip_tunnel_6rd_parm {
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struct in6_addr prefix;
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__be32 relay_prefix;
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u16 prefixlen;
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u16 relay_prefixlen;
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};
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#endif
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struct ip_tunnel_encap {
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u16 type;
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u16 flags;
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__be16 sport;
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__be16 dport;
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};
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struct ip_tunnel_prl_entry {
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struct ip_tunnel_prl_entry __rcu *next;
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__be32 addr;
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u16 flags;
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struct rcu_head rcu_head;
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};
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struct ip_tunnel_dst {
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struct dst_entry __rcu *dst;
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__be32 saddr;
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};
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struct metadata_dst;
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struct ip_tunnel {
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struct ip_tunnel __rcu *next;
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struct hlist_node hash_node;
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struct net_device *dev;
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struct net *net; /* netns for packet i/o */
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int err_count; /* Number of arrived ICMP errors */
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unsigned long err_time; /* Time when the last ICMP error
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* arrived */
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/* These four fields used only by GRE */
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u32 i_seqno; /* The last seen seqno */
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u32 o_seqno; /* The last output seqno */
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int tun_hlen; /* Precalculated header length */
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int mlink;
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struct ip_tunnel_dst __percpu *dst_cache;
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struct ip_tunnel_parm parms;
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int encap_hlen; /* Encap header length (FOU,GUE) */
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struct ip_tunnel_encap encap;
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int hlen; /* tun_hlen + encap_hlen */
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/* for SIT */
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#ifdef CONFIG_IPV6_SIT_6RD
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struct ip_tunnel_6rd_parm ip6rd;
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#endif
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struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */
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unsigned int prl_count; /* # of entries in PRL */
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int ip_tnl_net_id;
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struct gro_cells gro_cells;
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bool collect_md;
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};
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#define TUNNEL_CSUM __cpu_to_be16(0x01)
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#define TUNNEL_ROUTING __cpu_to_be16(0x02)
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#define TUNNEL_KEY __cpu_to_be16(0x04)
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#define TUNNEL_SEQ __cpu_to_be16(0x08)
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#define TUNNEL_STRICT __cpu_to_be16(0x10)
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#define TUNNEL_REC __cpu_to_be16(0x20)
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#define TUNNEL_VERSION __cpu_to_be16(0x40)
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#define TUNNEL_NO_KEY __cpu_to_be16(0x80)
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#define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100)
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#define TUNNEL_OAM __cpu_to_be16(0x0200)
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#define TUNNEL_CRIT_OPT __cpu_to_be16(0x0400)
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#define TUNNEL_GENEVE_OPT __cpu_to_be16(0x0800)
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#define TUNNEL_VXLAN_OPT __cpu_to_be16(0x1000)
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#define TUNNEL_OPTIONS_PRESENT (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT)
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struct tnl_ptk_info {
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__be16 flags;
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__be16 proto;
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__be32 key;
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__be32 seq;
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};
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#define PACKET_RCVD 0
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#define PACKET_REJECT 1
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#define IP_TNL_HASH_BITS 7
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#define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS)
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struct ip_tunnel_net {
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struct net_device *fb_tunnel_dev;
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struct hlist_head tunnels[IP_TNL_HASH_SIZE];
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struct ip_tunnel __rcu *collect_md_tun;
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};
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struct ip_tunnel_encap_ops {
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size_t (*encap_hlen)(struct ip_tunnel_encap *e);
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int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e,
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u8 *protocol, struct flowi4 *fl4);
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};
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#define MAX_IPTUN_ENCAP_OPS 8
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extern const struct ip_tunnel_encap_ops __rcu *
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iptun_encaps[MAX_IPTUN_ENCAP_OPS];
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int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op,
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unsigned int num);
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int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op,
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unsigned int num);
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static inline void __ip_tunnel_info_init(struct ip_tunnel_info *tun_info,
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__be32 saddr, __be32 daddr,
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u8 tos, u8 ttl,
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__be16 tp_src, __be16 tp_dst,
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__be64 tun_id, __be16 tun_flags,
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const void *opts, u8 opts_len)
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{
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tun_info->key.tun_id = tun_id;
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tun_info->key.u.ipv4.src = saddr;
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tun_info->key.u.ipv4.dst = daddr;
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memset((unsigned char *)&tun_info->key + IP_TUNNEL_KEY_IPV4_PAD,
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0, IP_TUNNEL_KEY_IPV4_PAD_LEN);
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tun_info->key.tos = tos;
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tun_info->key.ttl = ttl;
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tun_info->key.tun_flags = tun_flags;
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/* For the tunnel types on the top of IPsec, the tp_src and tp_dst of
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* the upper tunnel are used.
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* E.g: GRE over IPSEC, the tp_src and tp_port are zero.
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*/
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tun_info->key.tp_src = tp_src;
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tun_info->key.tp_dst = tp_dst;
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/* Clear struct padding. */
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if (sizeof(tun_info->key) != IP_TUNNEL_KEY_SIZE)
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memset((unsigned char *)&tun_info->key + IP_TUNNEL_KEY_SIZE,
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0, sizeof(tun_info->key) - IP_TUNNEL_KEY_SIZE);
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tun_info->options = opts;
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tun_info->options_len = opts_len;
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}
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static inline void ip_tunnel_info_init(struct ip_tunnel_info *tun_info,
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const struct iphdr *iph,
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__be16 tp_src, __be16 tp_dst,
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__be64 tun_id, __be16 tun_flags,
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const void *opts, u8 opts_len)
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{
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__ip_tunnel_info_init(tun_info, iph->saddr, iph->daddr,
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iph->tos, iph->ttl, tp_src, tp_dst,
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tun_id, tun_flags, opts, opts_len);
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}
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#ifdef CONFIG_INET
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int ip_tunnel_init(struct net_device *dev);
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void ip_tunnel_uninit(struct net_device *dev);
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void ip_tunnel_dellink(struct net_device *dev, struct list_head *head);
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struct net *ip_tunnel_get_link_net(const struct net_device *dev);
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int ip_tunnel_get_iflink(const struct net_device *dev);
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int ip_tunnel_init_net(struct net *net, int ip_tnl_net_id,
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struct rtnl_link_ops *ops, char *devname);
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void ip_tunnel_delete_net(struct ip_tunnel_net *itn, struct rtnl_link_ops *ops);
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void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
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const struct iphdr *tnl_params, const u8 protocol);
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int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd);
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int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t,
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u8 *protocol, struct flowi4 *fl4);
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int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu);
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struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev,
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struct rtnl_link_stats64 *tot);
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struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn,
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int link, __be16 flags,
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__be32 remote, __be32 local,
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__be32 key);
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int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
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const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst,
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bool log_ecn_error);
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int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[],
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struct ip_tunnel_parm *p);
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int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],
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struct ip_tunnel_parm *p);
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void ip_tunnel_setup(struct net_device *dev, int net_id);
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void ip_tunnel_dst_reset_all(struct ip_tunnel *t);
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int ip_tunnel_encap_setup(struct ip_tunnel *t,
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struct ip_tunnel_encap *ipencap);
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/* Extract dsfield from inner protocol */
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static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph,
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const struct sk_buff *skb)
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{
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if (skb->protocol == htons(ETH_P_IP))
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return iph->tos;
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else if (skb->protocol == htons(ETH_P_IPV6))
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return ipv6_get_dsfield((const struct ipv6hdr *)iph);
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else
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return 0;
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}
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/* Propogate ECN bits out */
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static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph,
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const struct sk_buff *skb)
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{
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u8 inner = ip_tunnel_get_dsfield(iph, skb);
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return INET_ECN_encapsulate(tos, inner);
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}
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int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto);
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int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
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__be32 src, __be32 dst, u8 proto,
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u8 tos, u8 ttl, __be16 df, bool xnet);
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struct sk_buff *iptunnel_handle_offloads(struct sk_buff *skb, bool gre_csum,
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int gso_type_mask);
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static inline void iptunnel_xmit_stats(int err,
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struct net_device_stats *err_stats,
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struct pcpu_sw_netstats __percpu *stats)
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{
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if (err > 0) {
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struct pcpu_sw_netstats *tstats = this_cpu_ptr(stats);
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u64_stats_update_begin(&tstats->syncp);
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tstats->tx_bytes += err;
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tstats->tx_packets++;
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u64_stats_update_end(&tstats->syncp);
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} else if (err < 0) {
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err_stats->tx_errors++;
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err_stats->tx_aborted_errors++;
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} else {
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err_stats->tx_dropped++;
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}
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}
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static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info, size_t n)
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{
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return info + 1;
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}
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static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate)
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{
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return (struct ip_tunnel_info *)lwtstate->data;
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}
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extern struct static_key ip_tunnel_metadata_cnt;
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/* Returns > 0 if metadata should be collected */
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static inline int ip_tunnel_collect_metadata(void)
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{
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return static_key_false(&ip_tunnel_metadata_cnt);
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}
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void __init ip_tunnel_core_init(void);
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void ip_tunnel_need_metadata(void);
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void ip_tunnel_unneed_metadata(void);
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#else /* CONFIG_INET */
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static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate)
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{
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return NULL;
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}
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static inline void ip_tunnel_need_metadata(void)
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{
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}
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static inline void ip_tunnel_unneed_metadata(void)
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{
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}
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#endif /* CONFIG_INET */
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#endif /* __NET_IP_TUNNELS_H */
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