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https://github.com/openvswitch/ovs
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e23775f20e
Following patch adds support for lwtunnel to OVS datapath. With this change OVS datapath detect lwtunnel support and make use of new APIs if available. On older kernel where the support is not there the backported tunnel modules are used. These backported tunnel devices acts as lwtunnel devices. I tried to keep backported module same as upstream for easier bug-fix backport. Since STT and LISP are not upstream OVS always needs to use respective modules from tunnel compat layer. To make it work on kernel 4.3 I have converted STT and LISP modules to lwtunnel API model. lwtunnel make use of skb-dst to pass tunnel information to the tunnel module. On older kernel this is not possible. So the in case of old kernel metadata ref is stored in OVS_CB and direct call to tunnel transmit function is made by respective tunnel vport modules. Similarly on receive side tunnel recv directly call netdev-vport-receive to pass the skb to OVS. Major backported components include: Geneve, GRE, VXLAN, ip_tunnel, udp-tunnels GRO. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Joe Stringer <joe@ovn.org> Acked-by: Jesse Gross <jesse@kernel.org>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
#ifndef __LINUX_GRE_WRAPPER_H
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#define __LINUX_GRE_WRAPPER_H
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#include <linux/skbuff.h>
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#include <net/ip_tunnels.h>
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#ifdef HAVE_METADATA_DST
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#include_next <net/gre.h>
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static inline int rpl_ipgre_init(void)
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{
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return 0;
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}
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static inline void rpl_ipgre_fini(void)
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{}
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#define gre_fb_xmit dev_queue_xmit
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#else
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#include <linux/version.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) || \
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defined(HAVE_GRE_CISCO_REGISTER)
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#include_next <net/gre.h>
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#endif
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#ifndef HAVE_GRE_CISCO_REGISTER
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/* GRE demux not available, implement our own demux. */
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#define MAX_GRE_PROTO_PRIORITY 255
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struct gre_cisco_protocol {
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int (*handler)(struct sk_buff *skb, const struct tnl_ptk_info *tpi);
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int (*err_handler)(struct sk_buff *skb, u32 info,
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const struct tnl_ptk_info *tpi);
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u8 priority;
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};
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#define gre_cisco_register rpl_gre_cisco_register
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int rpl_gre_cisco_register(struct gre_cisco_protocol *proto);
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#define gre_cisco_unregister rpl_gre_cisco_unregister
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int rpl_gre_cisco_unregister(struct gre_cisco_protocol *proto);
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#ifndef GRE_HEADER_SECTION
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struct gre_base_hdr {
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__be16 flags;
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__be16 protocol;
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};
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#define GRE_HEADER_SECTION 4
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#endif
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#endif /* HAVE_GRE_CISCO_REGISTER */
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int rpl_ipgre_init(void);
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void rpl_ipgre_fini(void);
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#define gretap_fb_dev_create rpl_gretap_fb_dev_create
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struct net_device *rpl_gretap_fb_dev_create(struct net *net, const char *name,
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u8 name_assign_type);
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#define gre_fb_xmit rpl_gre_fb_xmit
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netdev_tx_t rpl_gre_fb_xmit(struct sk_buff *skb);
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#endif /* HAVE_METADATA_DST */
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#define ipgre_init rpl_ipgre_init
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#define ipgre_fini rpl_ipgre_fini
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#endif
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