c5fb8caaf9
Commit3511494ce2("vxlan: Group Policy extension") changed definition of VXLAN_HF_RCO from 0x00200000 to BIT(24). This is obviously incorrect. It's also in violation with the RFC draft. Fixes:3511494ce2("vxlan: Group Policy extension") Cc: Thomas Graf <tgraf@suug.ch> Cc: Tom Herbert <therbert@google.com> Signed-off-by: Jiri Benc <jbenc@redhat.com> Acked-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
259 lines
7.0 KiB
C
259 lines
7.0 KiB
C
#ifndef __NET_VXLAN_H
|
|
#define __NET_VXLAN_H 1
|
|
|
|
#include <linux/ip.h>
|
|
#include <linux/ipv6.h>
|
|
#include <linux/if_vlan.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/udp.h>
|
|
#include <net/dst_metadata.h>
|
|
|
|
#define VNI_HASH_BITS 10
|
|
#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
|
|
|
|
/*
|
|
* 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(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;
|
|
};
|
|
|
|
/* per UDP socket information */
|
|
struct vxlan_sock {
|
|
struct hlist_node hlist;
|
|
struct work_struct del_work;
|
|
struct socket *sock;
|
|
struct rcu_head rcu;
|
|
struct hlist_head vni_list[VNI_HASH_SIZE];
|
|
atomic_t refcnt;
|
|
struct udp_offload udp_offloads;
|
|
u32 flags;
|
|
};
|
|
|
|
union vxlan_addr {
|
|
struct sockaddr_in sin;
|
|
struct sockaddr_in6 sin6;
|
|
struct sockaddr sa;
|
|
};
|
|
|
|
struct vxlan_rdst {
|
|
union vxlan_addr remote_ip;
|
|
__be16 remote_port;
|
|
u32 remote_vni;
|
|
u32 remote_ifindex;
|
|
struct list_head list;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
struct vxlan_config {
|
|
union vxlan_addr remote_ip;
|
|
union vxlan_addr saddr;
|
|
u32 vni;
|
|
int remote_ifindex;
|
|
int mtu;
|
|
__be16 dst_port;
|
|
__u16 port_min;
|
|
__u16 port_max;
|
|
__u8 tos;
|
|
__u8 ttl;
|
|
u32 flags;
|
|
unsigned long age_interval;
|
|
unsigned int addrmax;
|
|
bool no_share;
|
|
};
|
|
|
|
/* Pseudo network device */
|
|
struct vxlan_dev {
|
|
struct hlist_node hlist; /* vni hash table */
|
|
struct list_head next; /* vxlan's per namespace list */
|
|
struct vxlan_sock *vn4_sock; /* listening socket for IPv4 */
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
struct vxlan_sock *vn6_sock; /* listening socket for IPv6 */
|
|
#endif
|
|
struct net_device *dev;
|
|
struct net *net; /* netns for packet i/o */
|
|
struct vxlan_rdst default_dst; /* default destination */
|
|
u32 flags; /* VXLAN_F_* in vxlan.h */
|
|
|
|
struct timer_list age_timer;
|
|
spinlock_t hash_lock;
|
|
unsigned int addrcnt;
|
|
struct gro_cells gro_cells;
|
|
|
|
struct vxlan_config cfg;
|
|
|
|
struct hlist_head fdb_head[FDB_HASH_SIZE];
|
|
};
|
|
|
|
#define VXLAN_F_LEARN 0x01
|
|
#define VXLAN_F_PROXY 0x02
|
|
#define VXLAN_F_RSC 0x04
|
|
#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_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
|
|
#define VXLAN_F_REMCSUM_NOPARTIAL 0x1000
|
|
#define VXLAN_F_COLLECT_METADATA 0x2000
|
|
|
|
/* Flags that are used in the receive path. 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 | \
|
|
VXLAN_F_REMCSUM_NOPARTIAL | \
|
|
VXLAN_F_COLLECT_METADATA)
|
|
|
|
struct net_device *vxlan_dev_create(struct net *net, const char *name,
|
|
u8 name_assign_type, struct vxlan_config *conf);
|
|
|
|
static inline __be16 vxlan_dev_dst_port(struct vxlan_dev *vxlan,
|
|
unsigned short family)
|
|
{
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
if (family == AF_INET6)
|
|
return inet_sk(vxlan->vn6_sock->sock->sk)->inet_sport;
|
|
#endif
|
|
return inet_sk(vxlan->vn4_sock->sock->sk)->inet_sport;
|
|
}
|
|
|
|
static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
|
|
netdev_features_t features)
|
|
{
|
|
u8 l4_hdr = 0;
|
|
|
|
if (!skb->encapsulation)
|
|
return features;
|
|
|
|
switch (vlan_get_protocol(skb)) {
|
|
case htons(ETH_P_IP):
|
|
l4_hdr = ip_hdr(skb)->protocol;
|
|
break;
|
|
case htons(ETH_P_IPV6):
|
|
l4_hdr = ipv6_hdr(skb)->nexthdr;
|
|
break;
|
|
default:
|
|
return features;;
|
|
}
|
|
|
|
if ((l4_hdr == IPPROTO_UDP) &&
|
|
(skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
|
|
skb->inner_protocol != htons(ETH_P_TEB) ||
|
|
(skb_inner_mac_header(skb) - skb_transport_header(skb) !=
|
|
sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
|
|
return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);
|
|
|
|
return features;
|
|
}
|
|
|
|
/* IP header + UDP + VXLAN + Ethernet header */
|
|
#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
|
|
/* IPv6 header + UDP + VXLAN + Ethernet header */
|
|
#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
|
|
|
|
#if IS_ENABLED(CONFIG_VXLAN)
|
|
void vxlan_get_rx_port(struct net_device *netdev);
|
|
#else
|
|
static inline void vxlan_get_rx_port(struct net_device *netdev)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs)
|
|
{
|
|
return vs->sock->sk->sk_family;
|
|
}
|
|
|
|
#endif
|