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-rw-r--r--include/net/vxlan.h201
1 files changed, 176 insertions, 25 deletions
diff --git a/include/net/vxlan.h b/include/net/vxlan.h
index 09767819c3d4..0ee50785f4f1 100644
--- a/include/net/vxlan.h
+++ b/include/net/vxlan.h
@@ -3,10 +3,15 @@
#define __NET_VXLAN_H 1
#include <linux/if_vlan.h>
+#include <linux/rhashtable-types.h>
#include <net/udp_tunnel.h>
#include <net/dst_metadata.h>
#include <net/rtnetlink.h>
#include <net/switchdev.h>
+#include <net/nexthop.h>
+
+#define IANA_VXLAN_UDP_PORT 4789
+#define IANA_VXLAN_GPE_UDP_PORT 4790
/* VXLAN protocol (RFC 7348) header:
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
@@ -118,6 +123,9 @@ struct vxlanhdr_gbp {
#define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16)
#define VXLAN_GBP_ID_MASK (0xFFFF)
+#define VXLAN_GBP_MASK (VXLAN_GBP_DONT_LEARN | VXLAN_GBP_POLICY_APPLIED | \
+ VXLAN_GBP_ID_MASK)
+
/*
* VXLAN Generic Protocol Extension (VXLAN_F_GPE):
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
@@ -195,28 +203,56 @@ struct vxlan_rdst {
u8 offloaded:1;
__be32 remote_vni;
u32 remote_ifindex;
+ struct net_device *remote_dev;
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;
- __be32 vni;
- int remote_ifindex;
- int mtu;
- __be16 dst_port;
- u16 port_min;
- u16 port_max;
- u8 tos;
- u8 ttl;
- __be32 label;
- u32 flags;
- unsigned long age_interval;
- unsigned int addrmax;
- bool no_share;
- enum ifla_vxlan_df df;
+ union vxlan_addr remote_ip;
+ union vxlan_addr saddr;
+ __be32 vni;
+ int remote_ifindex;
+ int mtu;
+ __be16 dst_port;
+ u16 port_min;
+ u16 port_max;
+ u8 tos;
+ u8 ttl;
+ __be32 label;
+ enum ifla_vxlan_label_policy label_policy;
+ u32 flags;
+ unsigned long age_interval;
+ unsigned int addrmax;
+ bool no_share;
+ enum ifla_vxlan_df df;
+ struct vxlanhdr reserved_bits;
+};
+
+enum {
+ VXLAN_VNI_STATS_RX,
+ VXLAN_VNI_STATS_RX_DROPS,
+ VXLAN_VNI_STATS_RX_ERRORS,
+ VXLAN_VNI_STATS_TX,
+ VXLAN_VNI_STATS_TX_DROPS,
+ VXLAN_VNI_STATS_TX_ERRORS,
+};
+
+struct vxlan_vni_stats {
+ u64 rx_packets;
+ u64 rx_bytes;
+ u64 rx_drops;
+ u64 rx_errors;
+ u64 tx_packets;
+ u64 tx_bytes;
+ u64 tx_drops;
+ u64 tx_errors;
+};
+
+struct vxlan_vni_stats_pcpu {
+ struct vxlan_vni_stats stats;
+ struct u64_stats_sync syncp;
};
struct vxlan_dev_node {
@@ -224,6 +260,26 @@ struct vxlan_dev_node {
struct vxlan_dev *vxlan;
};
+struct vxlan_vni_node {
+ struct rhash_head vnode;
+ struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */
+#if IS_ENABLED(CONFIG_IPV6)
+ struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */
+#endif
+ struct list_head vlist;
+ __be32 vni;
+ union vxlan_addr remote_ip; /* default remote ip for this vni */
+ struct vxlan_vni_stats_pcpu __percpu *stats;
+
+ struct rcu_head rcu;
+};
+
+struct vxlan_vni_group {
+ struct rhashtable vni_hash;
+ struct list_head vni_list;
+ u32 num_vnis;
+};
+
/* Pseudo network device */
struct vxlan_dev {
struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */
@@ -246,7 +302,14 @@ struct vxlan_dev {
struct vxlan_config cfg;
- struct hlist_head fdb_head[FDB_HASH_SIZE];
+ struct vxlan_vni_group __rcu *vnigrp;
+
+ struct rhashtable fdb_hash_tbl;
+
+ struct rhashtable mdb_tbl;
+ struct hlist_head fdb_list;
+ struct hlist_head mdb_list;
+ unsigned int mdb_seq;
};
#define VXLAN_F_LEARN 0x01
@@ -266,6 +329,10 @@ struct vxlan_dev {
#define VXLAN_F_GPE 0x4000
#define VXLAN_F_IPV6_LINKLOCAL 0x8000
#define VXLAN_F_TTL_INHERIT 0x10000
+#define VXLAN_F_VNIFILTER 0x20000
+#define VXLAN_F_MDB 0x40000
+#define VXLAN_F_LOCALBYPASS 0x80000
+#define VXLAN_F_MC_ROUTE 0x100000
/* Flags that are used in the receive path. These flags must match in
* order for a socket to be shareable
@@ -275,7 +342,8 @@ struct vxlan_dev {
VXLAN_F_UDP_ZERO_CSUM6_RX | \
VXLAN_F_REMCSUM_RX | \
VXLAN_F_REMCSUM_NOPARTIAL | \
- VXLAN_F_COLLECT_METADATA)
+ VXLAN_F_COLLECT_METADATA | \
+ VXLAN_F_VNIFILTER)
/* Flags that can be set together with VXLAN_F_GPE. */
#define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE | \
@@ -284,7 +352,11 @@ struct vxlan_dev {
VXLAN_F_UDP_ZERO_CSUM_TX | \
VXLAN_F_UDP_ZERO_CSUM6_TX | \
VXLAN_F_UDP_ZERO_CSUM6_RX | \
- VXLAN_F_COLLECT_METADATA)
+ VXLAN_F_COLLECT_METADATA | \
+ VXLAN_F_VNIFILTER | \
+ VXLAN_F_LOCALBYPASS | \
+ VXLAN_F_MC_ROUTE | \
+ 0)
struct net_device *vxlan_dev_create(struct net *net, const char *name,
u8 name_assign_type, struct vxlan_config *conf);
@@ -320,10 +392,15 @@ static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
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)
+static inline int vxlan_headroom(u32 flags)
+{
+ /* VXLAN: IP4/6 header + UDP + VXLAN + Ethernet header */
+ /* VXLAN-GPE: IP4/6 header + UDP + VXLAN */
+ return (flags & VXLAN_F_IPV6 ? sizeof(struct ipv6hdr) :
+ sizeof(struct iphdr)) +
+ sizeof(struct udphdr) + sizeof(struct vxlanhdr) +
+ (flags & VXLAN_F_GPE ? 0 : ETH_HLEN);
+}
static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb)
{
@@ -389,7 +466,7 @@ static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
if (ipa->sa.sa_family == AF_INET6)
return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
else
- return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
+ return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
}
#else /* !IS_ENABLED(CONFIG_IPV6) */
@@ -401,7 +478,7 @@ static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
{
- return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
+ return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
}
#endif /* IS_ENABLED(CONFIG_IPV6) */
@@ -453,4 +530,78 @@ vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
}
#endif
+static inline void vxlan_flag_attr_error(int attrtype,
+ struct netlink_ext_ack *extack)
+{
+#define VXLAN_FLAG(flg) \
+ case IFLA_VXLAN_##flg: \
+ NL_SET_ERR_MSG_MOD(extack, \
+ "cannot change " #flg " flag"); \
+ break
+ switch (attrtype) {
+ VXLAN_FLAG(TTL_INHERIT);
+ VXLAN_FLAG(LEARNING);
+ VXLAN_FLAG(PROXY);
+ VXLAN_FLAG(RSC);
+ VXLAN_FLAG(L2MISS);
+ VXLAN_FLAG(L3MISS);
+ VXLAN_FLAG(COLLECT_METADATA);
+ VXLAN_FLAG(UDP_ZERO_CSUM6_TX);
+ VXLAN_FLAG(UDP_ZERO_CSUM6_RX);
+ VXLAN_FLAG(REMCSUM_TX);
+ VXLAN_FLAG(REMCSUM_RX);
+ VXLAN_FLAG(GBP);
+ VXLAN_FLAG(GPE);
+ VXLAN_FLAG(REMCSUM_NOPARTIAL);
+ default:
+ NL_SET_ERR_MSG_MOD(extack, \
+ "cannot change flag");
+ break;
+ }
+#undef VXLAN_FLAG
+}
+
+static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh,
+ u32 hash,
+ struct vxlan_rdst *rdst)
+{
+ struct fib_nh_common *nhc;
+
+ nhc = nexthop_path_fdb_result(nh, hash >> 1);
+ if (unlikely(!nhc))
+ return false;
+
+ switch (nhc->nhc_gw_family) {
+ case AF_INET:
+ rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4;
+ rdst->remote_ip.sa.sa_family = AF_INET;
+ break;
+ case AF_INET6:
+ rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6;
+ rdst->remote_ip.sa.sa_family = AF_INET6;
+ break;
+ }
+
+ return true;
+}
+
+static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, const struct vxlan_metadata *md)
+{
+ struct vxlanhdr_gbp *gbp;
+
+ if (!md->gbp)
+ return;
+
+ gbp = (struct vxlanhdr_gbp *)vxh;
+ vxh->vx_flags |= VXLAN_HF_GBP;
+
+ if (md->gbp & VXLAN_GBP_DONT_LEARN)
+ gbp->dont_learn = 1;
+
+ if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
+ gbp->policy_applied = 1;
+
+ gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
+}
+
#endif
generated by cgit (git 2.34.1) at 2025-12-24 22:58:38 +0000