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9ffdbf4119
There are two important GSO tunnel features that were introduced after the 3.12 cutoff for our current out of tree GSO implementation: * 3.16 introduced support for outer UDP checksums. * 3.18 introduced support for verifying hardware support for protocols other than VXLAN. In cases where these features are used, we should use OVS GSO to ensure correct behavior. However, we also want to continue to use kernel GSO or hardware TSO in existing situations. Therefore, this extends the range of kernels where OVS GSO is available to 3.18 and makes it easier to select which one to use. Signed-off-by: Jesse Gross <jesse@nicira.com> Acked-by: Thomas Graf <tgraf@noironetworks.com> Acked-by: Pravin B Shelar <pshelar@nicira.com>
145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
#ifndef __NET_VXLAN_WRAPPER_H
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#define __NET_VXLAN_WRAPPER_H 1
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/udp.h>
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#include <net/gre.h>
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#include <linux/version.h>
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#ifdef HAVE_VXLAN_METADATA
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#define USE_UPSTREAM_VXLAN
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#include_next <net/vxlan.h>
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#endif
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#ifndef VXLAN_HLEN
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/* VXLAN header flags. */
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#define VXLAN_HF_VNI 0x08000000
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#ifndef VXLAN_HF_GBP
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#define VXLAN_HF_GBP 0x80000000
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#endif
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#define VXLAN_N_VID (1u << 24)
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#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
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#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
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#endif
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#ifndef VXLAN_GBP_USED_BITS
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/*
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* VXLAN Group Based Policy Extension:
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |1|-|-|-|1|-|-|-|R|D|R|R|A|R|R|R| Group Policy ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | VXLAN Network Identifier (VNI) | Reserved |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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* D = Don't Learn bit. When set, this bit indicates that the egress
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* VTEP MUST NOT learn the source address of the encapsulated frame.
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*
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* A = Indicates that the group policy has already been applied to
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* this packet. Policies MUST NOT be applied by devices when the
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* A bit is set.
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*
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* [0] https://tools.ietf.org/html/draft-smith-vxlan-group-policy
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*/
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struct vxlanhdr_gbp {
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__u8 vx_flags;
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#ifdef __LITTLE_ENDIAN_BITFIELD
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__u8 reserved_flags1:3,
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policy_applied:1,
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reserved_flags2:2,
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dont_learn:1,
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reserved_flags3:1;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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__u8 reserved_flags1:1,
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dont_learn:1,
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reserved_flags2:2,
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policy_applied:1,
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reserved_flags3:3;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be16 policy_id;
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__be32 vx_vni;
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};
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#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | 0xFFFFFF)
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/* skb->mark mapping
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*
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |R|R|R|R|R|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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#define VXLAN_GBP_DONT_LEARN (BIT(6) << 16)
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#define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16)
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#define VXLAN_GBP_ID_MASK (0xFFFF)
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#define VXLAN_F_GBP 0x800
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#endif
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#ifndef VXLAN_F_RCV_FLAGS
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#define VXLAN_F_RCV_FLAGS VXLAN_F_GBP
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#endif
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#ifdef USE_UPSTREAM_VXLAN
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static inline int rpl_vxlan_xmit_skb(struct vxlan_sock *vs,
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struct rtable *rt, struct sk_buff *skb,
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__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
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__be16 src_port, __be16 dst_port,
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struct vxlan_metadata *md, bool xnet, u32 vxflags)
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{
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if (skb_is_gso(skb) && skb_is_encapsulated(skb)) {
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kfree_skb(skb);
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return -ENOSYS;
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}
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return vxlan_xmit_skb(rt, skb, src, dst, tos, ttl, df,
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src_port, dst_port, md, xnet, vxflags);
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}
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#define vxlan_xmit_skb rpl_vxlan_xmit_skb
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#else /* USE_UPSTREAM_VXLAN */
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struct vxlan_metadata {
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__be32 vni;
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u32 gbp;
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};
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#define vxlan_sock rpl_vxlan_sock
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struct rpl_vxlan_sock;
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#define vxlan_rcv_t rpl_vxlan_rcv_t
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typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb,
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struct vxlan_metadata *md);
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/* per UDP socket information */
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struct vxlan_sock {
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struct hlist_node hlist;
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vxlan_rcv_t *rcv;
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void *data;
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struct work_struct del_work;
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struct socket *sock;
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struct rcu_head rcu;
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u32 flags;
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};
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#define vxlan_sock_add rpl_vxlan_sock_add
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struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
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vxlan_rcv_t *rcv, void *data,
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bool no_share, u32 flags);
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#define vxlan_sock_release rpl_vxlan_sock_release
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void vxlan_sock_release(struct vxlan_sock *vs);
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#define vxlan_xmit_skb rpl_vxlan_xmit_skb
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int vxlan_xmit_skb(struct vxlan_sock *vs,
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struct rtable *rt, struct sk_buff *skb,
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__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
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__be16 src_port, __be16 dst_port,
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struct vxlan_metadata *md, bool xnet, u32 vxflags);
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#endif /* !HAVE_VXLAN_METADATA */
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#endif
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