diff options
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/vxlan.h | 79 |
1 files changed, 74 insertions, 5 deletions
diff --git a/include/net/vxlan.h b/include/net/vxlan.h index 0a7443b49133..f4a3583171bd 100644 --- a/include/net/vxlan.h +++ b/include/net/vxlan.h @@ -11,15 +11,76 @@ #define VNI_HASH_BITS 10 #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) -/* VXLAN protocol header */ +/* + * VXLAN Group Based Policy Extension: + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * |1|-|-|-|1|-|-|-|R|D|R|R|A|R|R|R| Group Policy ID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | VXLAN Network Identifier (VNI) | Reserved | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * + * D = Don't Learn bit. When set, this bit indicates that the egress + * VTEP MUST NOT learn the source address of the encapsulated frame. + * + * A = Indicates that the group policy has already been applied to + * this packet. Policies MUST NOT be applied by devices when the + * A bit is set. + * + * [0] https://tools.ietf.org/html/draft-smith-vxlan-group-policy + */ +struct vxlanhdr_gbp { + __u8 vx_flags; +#ifdef __LITTLE_ENDIAN_BITFIELD + __u8 reserved_flags1:3, + policy_applied:1, + reserved_flags2:2, + dont_learn:1, + reserved_flags3:1; +#elif defined(__BIG_ENDIAN_BITFIELD) + __u8 reserved_flags1:1, + dont_learn:1, + reserved_flags2:2, + policy_applied:1, + reserved_flags3:3; +#else +#error "Please fix <asm/byteorder.h>" +#endif + __be16 policy_id; + __be32 vx_vni; +}; + +#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | 0xFFFFFF) + +/* skb->mark mapping + * + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * |R|R|R|R|R|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ +#define VXLAN_GBP_DONT_LEARN (BIT(6) << 16) +#define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16) +#define VXLAN_GBP_ID_MASK (0xFFFF) + +/* VXLAN protocol header: + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * |G|R|R|R|I|R|R|C| Reserved | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | VXLAN Network Identifier (VNI) | Reserved | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * + * G = 1 Group Policy (VXLAN-GBP) + * I = 1 VXLAN Network Identifier (VNI) present + * C = 1 Remote checksum offload (RCO) + */ struct vxlanhdr { __be32 vx_flags; __be32 vx_vni; }; /* VXLAN header flags. */ -#define VXLAN_HF_VNI 0x08000000 -#define VXLAN_HF_RCO 0x00200000 +#define VXLAN_HF_RCO BIT(24) +#define VXLAN_HF_VNI BIT(27) +#define VXLAN_HF_GBP BIT(31) /* Remote checksum offload header option */ #define VXLAN_RCO_MASK 0x7f /* Last byte of vni field */ @@ -32,8 +93,14 @@ struct vxlanhdr { #define VXLAN_VID_MASK (VXLAN_N_VID - 1) #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) +struct vxlan_metadata { + __be32 vni; + u32 gbp; +}; + struct vxlan_sock; -typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key); +typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, + struct vxlan_metadata *md); /* per UDP socket information */ struct vxlan_sock { @@ -60,6 +127,7 @@ struct vxlan_sock { #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 #define VXLAN_F_REMCSUM_TX 0x200 #define VXLAN_F_REMCSUM_RX 0x400 +#define VXLAN_F_GBP 0x800 struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, vxlan_rcv_t *rcv, void *data, @@ -70,7 +138,8 @@ void vxlan_sock_release(struct vxlan_sock *vs); int vxlan_xmit_skb(struct vxlan_sock *vs, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, - __be16 src_port, __be16 dst_port, __be32 vni, bool xnet); + __be16 src_port, __be16 dst_port, struct vxlan_metadata *md, + bool xnet); static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, netdev_features_t features) |