diff options
Diffstat (limited to 'include/net/vxlan.h')
| -rw-r--r-- | include/net/vxlan.h | 103 |
1 files changed, 98 insertions, 5 deletions
diff --git a/include/net/vxlan.h b/include/net/vxlan.h index 903461aa5644..2927d6244481 100644 --- a/include/net/vxlan.h +++ b/include/net/vxlan.h @@ -11,14 +11,96 @@ #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_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 */ +#define VXLAN_RCO_UDP 0x80 /* Indicate UDP RCO (TCP when not set *) */ +#define VXLAN_RCO_SHIFT 1 /* Left shift of start */ +#define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1) +#define VXLAN_MAX_REMCSUM_START (VXLAN_RCO_MASK << VXLAN_RCO_SHIFT) + +#define VXLAN_N_VID (1u << 24) +#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 { @@ -31,6 +113,7 @@ struct vxlan_sock { struct hlist_head vni_list[VNI_HASH_SIZE]; atomic_t refcnt; struct udp_offload udp_offloads; + u32 flags; }; #define VXLAN_F_LEARN 0x01 @@ -42,6 +125,16 @@ struct vxlan_sock { #define VXLAN_F_UDP_CSUM 0x40 #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 #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 + +/* Flags that are used in the receive patch. These flags must match in + * order for a socket to be shareable + */ +#define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \ + VXLAN_F_UDP_ZERO_CSUM6_RX | \ + VXLAN_F_REMCSUM_RX) struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, vxlan_rcv_t *rcv, void *data, @@ -49,10 +142,10 @@ struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, void vxlan_sock_release(struct vxlan_sock *vs); -int vxlan_xmit_skb(struct vxlan_sock *vs, - struct rtable *rt, struct sk_buff *skb, +int vxlan_xmit_skb(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, u32 vxflags); static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, netdev_features_t features) |