#include <linux/udp.h>
#include <net/dst_metadata.h>
+/* VXLAN protocol (RFC 7348) header:
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |R|R|R|R|I|R|R|R| Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | VXLAN Network Identifier (VNI) | Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * I = VXLAN Network Identifier (VNI) present.
+ */
+struct vxlanhdr {
+ __be32 vx_flags;
+ __be32 vx_vni;
+};
+
+/* VXLAN header flags. */
+#define VXLAN_HF_VNI cpu_to_be32(BIT(27))
+
+#define VXLAN_N_VID (1u << 24)
+#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
+#define VXLAN_VNI_MASK cpu_to_be32(VXLAN_VID_MASK << 8)
+#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
+
#define VNI_HASH_BITS 10
#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
+#define FDB_HASH_BITS 8
+#define FDB_HASH_SIZE (1<<FDB_HASH_BITS)
+
+/* Remote checksum offload for VXLAN (VXLAN_F_REMCSUM_[RT]X):
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |R|R|R|R|I|R|R|R|R|R|C| Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | VXLAN Network Identifier (VNI) |O| Csum start |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * C = Remote checksum offload bit. When set indicates that the
+ * remote checksum offload data is present.
+ *
+ * O = Offset bit. Indicates the checksum offset relative to
+ * checksum start.
+ *
+ * Csum start = Checksum start divided by two.
+ *
+ * http://tools.ietf.org/html/draft-herbert-vxlan-rco
+ */
+
+/* VXLAN-RCO header flags. */
+#define VXLAN_HF_RCO cpu_to_be32(BIT(21))
+
+/* Remote checksum offload header option */
+#define VXLAN_RCO_MASK cpu_to_be32(0x7f) /* Last byte of vni field */
+#define VXLAN_RCO_UDP cpu_to_be32(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 (0x7f << VXLAN_RCO_SHIFT)
/*
- * VXLAN Group Based Policy Extension:
+ * VXLAN Group Based Policy Extension (VXLAN_F_GBP):
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * |1|-|-|-|1|-|-|-|R|D|R|R|A|R|R|R| Group Policy ID |
+ * |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | VXLAN Network Identifier (VNI) | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
+ * G = Group Policy ID present.
+ *
* D = Don't Learn bit. When set, this bit indicates that the egress
* VTEP MUST NOT learn the source address of the encapsulated frame.
*
* 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
+ * https://tools.ietf.org/html/draft-smith-vxlan-group-policy
*/
struct vxlanhdr_gbp {
- __u8 vx_flags;
+ u8 vx_flags;
#ifdef __LITTLE_ENDIAN_BITFIELD
- __u8 reserved_flags1:3,
+ 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,
+ u8 reserved_flags1:1,
dont_learn:1,
reserved_flags2:2,
policy_applied:1,
__be32 vx_vni;
};
-#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | 0xFFFFFF)
+/* VXLAN-GBP header flags. */
+#define VXLAN_HF_GBP cpu_to_be32(BIT(31))
+
+#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | cpu_to_be32(0xFFFFFF))
/* skb->mark mapping
*
#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(21)
-#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_VNI_MASK (VXLAN_VID_MASK << 8)
-#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
-
-#define VNI_HASH_BITS 10
-#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
-#define FDB_HASH_BITS 8
-#define FDB_HASH_SIZE (1<<FDB_HASH_BITS)
-
struct vxlan_metadata {
u32 gbp;
};
struct vxlan_rdst {
union vxlan_addr remote_ip;
__be16 remote_port;
- u32 remote_vni;
+ __be32 remote_vni;
u32 remote_ifindex;
struct list_head list;
struct rcu_head rcu;
+ struct dst_cache dst_cache;
};
struct vxlan_config {
union vxlan_addr remote_ip;
union vxlan_addr saddr;
- u32 vni;
+ __be32 vni;
int remote_ifindex;
int mtu;
__be16 dst_port;
- __u16 port_min;
- __u16 port_max;
- __u8 tos;
- __u8 ttl;
+ u16 port_min;
+ u16 port_max;
+ u8 tos;
+ u8 ttl;
+ __be32 label;
u32 flags;
unsigned long age_interval;
unsigned int addrmax;
#define VXLAN_F_L2MISS 0x08
#define VXLAN_F_L3MISS 0x10
#define VXLAN_F_IPV6 0x20
-#define VXLAN_F_UDP_CSUM 0x40
+#define VXLAN_F_UDP_ZERO_CSUM_TX 0x40
#define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
#define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
#define VXLAN_F_REMCSUM_TX 0x200
/* IPv6 header + UDP + VXLAN + Ethernet header */
#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
+static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb)
+{
+ return (struct vxlanhdr *)(udp_hdr(skb) + 1);
+}
+
+static inline __be32 vxlan_vni(__be32 vni_field)
+{
+#if defined(__BIG_ENDIAN)
+ return (__force __be32)((__force u32)vni_field >> 8);
+#else
+ return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8);
+#endif
+}
+
+static inline __be32 vxlan_vni_field(__be32 vni)
+{
+#if defined(__BIG_ENDIAN)
+ return (__force __be32)((__force u32)vni << 8);
+#else
+ return (__force __be32)((__force u32)vni >> 8);
+#endif
+}
+
+static inline __be32 vxlan_tun_id_to_vni(__be64 tun_id)
+{
+#if defined(__BIG_ENDIAN)
+ return (__force __be32)tun_id;
+#else
+ return (__force __be32)((__force u64)tun_id >> 32);
+#endif
+}
+
+static inline __be64 vxlan_vni_to_tun_id(__be32 vni)
+{
+#if defined(__BIG_ENDIAN)
+ return (__force __be64)vni;
+#else
+ return (__force __be64)((u64)(__force u32)vni << 32);
+#endif
+}
+
+static inline size_t vxlan_rco_start(__be32 vni_field)
+{
+ return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
+}
+
+static inline size_t vxlan_rco_offset(__be32 vni_field)
+{
+ return (vni_field & VXLAN_RCO_UDP) ?
+ offsetof(struct udphdr, check) :
+ offsetof(struct tcphdr, check);
+}
+
+static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset)
+{
+ __be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT);
+
+ if (offset == offsetof(struct udphdr, check))
+ vni_field |= VXLAN_RCO_UDP;
+ return vni_field;
+}
+
#if IS_ENABLED(CONFIG_VXLAN)
void vxlan_get_rx_port(struct net_device *netdev);
#else
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