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4830 lines
121 KiB
4830 lines
121 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* VXLAN: Virtual eXtensible Local Area Network |
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* |
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* Copyright (c) 2012-2013 Vyatta Inc. |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/errno.h> |
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#include <linux/slab.h> |
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#include <linux/udp.h> |
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#include <linux/igmp.h> |
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#include <linux/if_ether.h> |
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#include <linux/ethtool.h> |
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#include <net/arp.h> |
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#include <net/ndisc.h> |
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#include <net/ipv6_stubs.h> |
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#include <net/ip.h> |
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#include <net/icmp.h> |
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#include <net/rtnetlink.h> |
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#include <net/inet_ecn.h> |
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#include <net/net_namespace.h> |
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#include <net/netns/generic.h> |
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#include <net/tun_proto.h> |
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#include <net/vxlan.h> |
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#include <net/nexthop.h> |
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|
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#if IS_ENABLED(CONFIG_IPV6) |
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#include <net/ip6_tunnel.h> |
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#include <net/ip6_checksum.h> |
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#endif |
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#define VXLAN_VERSION "0.1" |
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|
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#define PORT_HASH_BITS 8 |
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#define PORT_HASH_SIZE (1<<PORT_HASH_BITS) |
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#define FDB_AGE_DEFAULT 300 /* 5 min */ |
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#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ |
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|
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/* UDP port for VXLAN traffic. |
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* The IANA assigned port is 4789, but the Linux default is 8472 |
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* for compatibility with early adopters. |
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*/ |
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static unsigned short vxlan_port __read_mostly = 8472; |
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module_param_named(udp_port, vxlan_port, ushort, 0444); |
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MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
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|
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static bool log_ecn_error = true; |
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module_param(log_ecn_error, bool, 0644); |
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MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); |
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|
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static unsigned int vxlan_net_id; |
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static struct rtnl_link_ops vxlan_link_ops; |
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|
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static const u8 all_zeros_mac[ETH_ALEN + 2]; |
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static int vxlan_sock_add(struct vxlan_dev *vxlan); |
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|
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static void vxlan_vs_del_dev(struct vxlan_dev *vxlan); |
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|
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/* per-network namespace private data for this module */ |
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struct vxlan_net { |
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struct list_head vxlan_list; |
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struct hlist_head sock_list[PORT_HASH_SIZE]; |
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spinlock_t sock_lock; |
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struct notifier_block nexthop_notifier_block; |
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}; |
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|
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/* Forwarding table entry */ |
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struct vxlan_fdb { |
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struct hlist_node hlist; /* linked list of entries */ |
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struct rcu_head rcu; |
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unsigned long updated; /* jiffies */ |
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unsigned long used; |
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struct list_head remotes; |
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u8 eth_addr[ETH_ALEN]; |
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u16 state; /* see ndm_state */ |
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__be32 vni; |
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u16 flags; /* see ndm_flags and below */ |
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struct list_head nh_list; |
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struct nexthop __rcu *nh; |
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struct vxlan_dev __rcu *vdev; |
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}; |
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|
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#define NTF_VXLAN_ADDED_BY_USER 0x100 |
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|
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/* salt for hash table */ |
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static u32 vxlan_salt __read_mostly; |
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|
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static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
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{ |
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return vs->flags & VXLAN_F_COLLECT_METADATA || |
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ip_tunnel_collect_metadata(); |
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} |
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|
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#if IS_ENABLED(CONFIG_IPV6) |
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static inline |
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bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) |
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{ |
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if (a->sa.sa_family != b->sa.sa_family) |
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return false; |
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if (a->sa.sa_family == AF_INET6) |
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return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); |
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else |
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return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
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} |
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|
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static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) |
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{ |
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if (nla_len(nla) >= sizeof(struct in6_addr)) { |
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ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
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ip->sa.sa_family = AF_INET6; |
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return 0; |
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} else if (nla_len(nla) >= sizeof(__be32)) { |
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ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
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ip->sa.sa_family = AF_INET; |
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return 0; |
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} else { |
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return -EAFNOSUPPORT; |
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} |
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} |
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static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, |
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const union vxlan_addr *ip) |
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{ |
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if (ip->sa.sa_family == AF_INET6) |
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return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
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else |
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return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
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} |
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#else /* !CONFIG_IPV6 */ |
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|
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static inline |
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bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) |
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{ |
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return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
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} |
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|
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static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) |
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{ |
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if (nla_len(nla) >= sizeof(struct in6_addr)) { |
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return -EAFNOSUPPORT; |
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} else if (nla_len(nla) >= sizeof(__be32)) { |
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ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
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ip->sa.sa_family = AF_INET; |
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return 0; |
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} else { |
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return -EAFNOSUPPORT; |
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} |
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} |
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static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, |
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const union vxlan_addr *ip) |
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{ |
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return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
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} |
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#endif |
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|
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/* Virtual Network hash table head */ |
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static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) |
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{ |
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return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; |
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} |
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|
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/* Socket hash table head */ |
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static inline struct hlist_head *vs_head(struct net *net, __be16 port) |
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{ |
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struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
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|
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return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
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} |
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|
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/* First remote destination for a forwarding entry. |
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* Guaranteed to be non-NULL because remotes are never deleted. |
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*/ |
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static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
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{ |
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if (rcu_access_pointer(fdb->nh)) |
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return NULL; |
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return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
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} |
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|
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static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) |
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{ |
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if (rcu_access_pointer(fdb->nh)) |
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return NULL; |
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return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); |
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} |
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|
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/* Find VXLAN socket based on network namespace, address family, UDP port, |
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* enabled unshareable flags and socket device binding (see l3mdev with |
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* non-default VRF). |
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*/ |
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static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, |
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__be16 port, u32 flags, int ifindex) |
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{ |
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struct vxlan_sock *vs; |
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flags &= VXLAN_F_RCV_FLAGS; |
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hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { |
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if (inet_sk(vs->sock->sk)->inet_sport == port && |
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vxlan_get_sk_family(vs) == family && |
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vs->flags == flags && |
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vs->sock->sk->sk_bound_dev_if == ifindex) |
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return vs; |
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} |
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return NULL; |
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} |
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static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, int ifindex, |
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__be32 vni) |
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{ |
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struct vxlan_dev_node *node; |
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|
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/* For flow based devices, map all packets to VNI 0 */ |
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if (vs->flags & VXLAN_F_COLLECT_METADATA) |
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vni = 0; |
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hlist_for_each_entry_rcu(node, vni_head(vs, vni), hlist) { |
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if (node->vxlan->default_dst.remote_vni != vni) |
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continue; |
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if (IS_ENABLED(CONFIG_IPV6)) { |
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const struct vxlan_config *cfg = &node->vxlan->cfg; |
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if ((cfg->flags & VXLAN_F_IPV6_LINKLOCAL) && |
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cfg->remote_ifindex != ifindex) |
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continue; |
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} |
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return node->vxlan; |
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} |
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return NULL; |
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} |
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/* Look up VNI in a per net namespace table */ |
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static struct vxlan_dev *vxlan_find_vni(struct net *net, int ifindex, |
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__be32 vni, sa_family_t family, |
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__be16 port, u32 flags) |
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{ |
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struct vxlan_sock *vs; |
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vs = vxlan_find_sock(net, family, port, flags, ifindex); |
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if (!vs) |
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return NULL; |
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return vxlan_vs_find_vni(vs, ifindex, vni); |
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} |
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/* Fill in neighbour message in skbuff. */ |
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static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, |
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const struct vxlan_fdb *fdb, |
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u32 portid, u32 seq, int type, unsigned int flags, |
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const struct vxlan_rdst *rdst) |
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{ |
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unsigned long now = jiffies; |
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struct nda_cacheinfo ci; |
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bool send_ip, send_eth; |
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struct nlmsghdr *nlh; |
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struct nexthop *nh; |
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struct ndmsg *ndm; |
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int nh_family; |
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u32 nh_id; |
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nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
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if (nlh == NULL) |
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return -EMSGSIZE; |
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ndm = nlmsg_data(nlh); |
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memset(ndm, 0, sizeof(*ndm)); |
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send_eth = send_ip = true; |
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rcu_read_lock(); |
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nh = rcu_dereference(fdb->nh); |
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if (nh) { |
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nh_family = nexthop_get_family(nh); |
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nh_id = nh->id; |
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} |
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rcu_read_unlock(); |
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if (type == RTM_GETNEIGH) { |
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if (rdst) { |
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send_ip = !vxlan_addr_any(&rdst->remote_ip); |
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ndm->ndm_family = send_ip ? rdst->remote_ip.sa.sa_family : AF_INET; |
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} else if (nh) { |
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ndm->ndm_family = nh_family; |
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} |
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send_eth = !is_zero_ether_addr(fdb->eth_addr); |
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} else |
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ndm->ndm_family = AF_BRIDGE; |
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ndm->ndm_state = fdb->state; |
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ndm->ndm_ifindex = vxlan->dev->ifindex; |
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ndm->ndm_flags = fdb->flags; |
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if (rdst && rdst->offloaded) |
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ndm->ndm_flags |= NTF_OFFLOADED; |
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ndm->ndm_type = RTN_UNICAST; |
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if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
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nla_put_s32(skb, NDA_LINK_NETNSID, |
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peernet2id(dev_net(vxlan->dev), vxlan->net))) |
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goto nla_put_failure; |
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if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
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goto nla_put_failure; |
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if (nh) { |
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if (nla_put_u32(skb, NDA_NH_ID, nh_id)) |
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goto nla_put_failure; |
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} else if (rdst) { |
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if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, |
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&rdst->remote_ip)) |
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goto nla_put_failure; |
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|
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if (rdst->remote_port && |
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rdst->remote_port != vxlan->cfg.dst_port && |
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nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
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goto nla_put_failure; |
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if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
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nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni))) |
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goto nla_put_failure; |
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if (rdst->remote_ifindex && |
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nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) |
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goto nla_put_failure; |
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} |
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|
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if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->vni && |
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nla_put_u32(skb, NDA_SRC_VNI, |
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be32_to_cpu(fdb->vni))) |
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goto nla_put_failure; |
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ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
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ci.ndm_confirmed = 0; |
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ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); |
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ci.ndm_refcnt = 0; |
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|
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if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
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goto nla_put_failure; |
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nlmsg_end(skb, nlh); |
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return 0; |
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nla_put_failure: |
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nlmsg_cancel(skb, nlh); |
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return -EMSGSIZE; |
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} |
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static inline size_t vxlan_nlmsg_size(void) |
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{ |
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return NLMSG_ALIGN(sizeof(struct ndmsg)) |
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+ nla_total_size(ETH_ALEN) /* NDA_LLADDR */ |
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+ nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
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+ nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
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+ nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
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+ nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ |
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+ nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
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+ nla_total_size(sizeof(struct nda_cacheinfo)); |
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} |
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static void __vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
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struct vxlan_rdst *rd, int type) |
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{ |
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struct net *net = dev_net(vxlan->dev); |
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struct sk_buff *skb; |
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int err = -ENOBUFS; |
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skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); |
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if (skb == NULL) |
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goto errout; |
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err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
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if (err < 0) { |
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/* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ |
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WARN_ON(err == -EMSGSIZE); |
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kfree_skb(skb); |
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goto errout; |
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} |
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rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); |
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return; |
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errout: |
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if (err < 0) |
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rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
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} |
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|
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static void vxlan_fdb_switchdev_notifier_info(const struct vxlan_dev *vxlan, |
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const struct vxlan_fdb *fdb, |
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const struct vxlan_rdst *rd, |
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struct netlink_ext_ack *extack, |
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struct switchdev_notifier_vxlan_fdb_info *fdb_info) |
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{ |
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fdb_info->info.dev = vxlan->dev; |
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fdb_info->info.extack = extack; |
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fdb_info->remote_ip = rd->remote_ip; |
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fdb_info->remote_port = rd->remote_port; |
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fdb_info->remote_vni = rd->remote_vni; |
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fdb_info->remote_ifindex = rd->remote_ifindex; |
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memcpy(fdb_info->eth_addr, fdb->eth_addr, ETH_ALEN); |
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fdb_info->vni = fdb->vni; |
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fdb_info->offloaded = rd->offloaded; |
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fdb_info->added_by_user = fdb->flags & NTF_VXLAN_ADDED_BY_USER; |
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} |
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|
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static int vxlan_fdb_switchdev_call_notifiers(struct vxlan_dev *vxlan, |
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struct vxlan_fdb *fdb, |
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struct vxlan_rdst *rd, |
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bool adding, |
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struct netlink_ext_ack *extack) |
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{ |
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struct switchdev_notifier_vxlan_fdb_info info; |
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enum switchdev_notifier_type notifier_type; |
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int ret; |
|
|
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if (WARN_ON(!rd)) |
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return 0; |
|
|
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notifier_type = adding ? SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE |
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: SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE; |
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vxlan_fdb_switchdev_notifier_info(vxlan, fdb, rd, NULL, &info); |
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ret = call_switchdev_notifiers(notifier_type, vxlan->dev, |
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&info.info, extack); |
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return notifier_to_errno(ret); |
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} |
|
|
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static int vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
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struct vxlan_rdst *rd, int type, bool swdev_notify, |
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struct netlink_ext_ack *extack) |
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{ |
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int err; |
|
|
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if (swdev_notify && rd) { |
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switch (type) { |
|
case RTM_NEWNEIGH: |
|
err = vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd, |
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true, extack); |
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if (err) |
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return err; |
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break; |
|
case RTM_DELNEIGH: |
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vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd, |
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false, extack); |
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break; |
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} |
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} |
|
|
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__vxlan_fdb_notify(vxlan, fdb, rd, type); |
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return 0; |
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} |
|
|
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static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
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{ |
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struct vxlan_dev *vxlan = netdev_priv(dev); |
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struct vxlan_fdb f = { |
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.state = NUD_STALE, |
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}; |
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struct vxlan_rdst remote = { |
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.remote_ip = *ipa, /* goes to NDA_DST */ |
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.remote_vni = cpu_to_be32(VXLAN_N_VID), |
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}; |
|
|
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vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true, NULL); |
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} |
|
|
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static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) |
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{ |
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struct vxlan_fdb f = { |
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.state = NUD_STALE, |
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}; |
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struct vxlan_rdst remote = { }; |
|
|
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memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
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|
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vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true, NULL); |
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} |
|
|
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/* Hash Ethernet address */ |
|
static u32 eth_hash(const unsigned char *addr) |
|
{ |
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u64 value = get_unaligned((u64 *)addr); |
|
|
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/* only want 6 bytes */ |
|
#ifdef __BIG_ENDIAN |
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value >>= 16; |
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#else |
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value <<= 16; |
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#endif |
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return hash_64(value, FDB_HASH_BITS); |
|
} |
|
|
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static u32 eth_vni_hash(const unsigned char *addr, __be32 vni) |
|
{ |
|
/* use 1 byte of OUI and 3 bytes of NIC */ |
|
u32 key = get_unaligned((u32 *)(addr + 2)); |
|
|
|
return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1); |
|
} |
|
|
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static u32 fdb_head_index(struct vxlan_dev *vxlan, const u8 *mac, __be32 vni) |
|
{ |
|
if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) |
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return eth_vni_hash(mac, vni); |
|
else |
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return eth_hash(mac); |
|
} |
|
|
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/* Hash chain to use given mac address */ |
|
static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, |
|
const u8 *mac, __be32 vni) |
|
{ |
|
return &vxlan->fdb_head[fdb_head_index(vxlan, mac, vni)]; |
|
} |
|
|
|
/* Look up Ethernet address in forwarding table */ |
|
static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
|
const u8 *mac, __be32 vni) |
|
{ |
|
struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni); |
|
struct vxlan_fdb *f; |
|
|
|
hlist_for_each_entry_rcu(f, head, hlist) { |
|
if (ether_addr_equal(mac, f->eth_addr)) { |
|
if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) { |
|
if (vni == f->vni) |
|
return f; |
|
} else { |
|
return f; |
|
} |
|
} |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
|
const u8 *mac, __be32 vni) |
|
{ |
|
struct vxlan_fdb *f; |
|
|
|
f = __vxlan_find_mac(vxlan, mac, vni); |
|
if (f && f->used != jiffies) |
|
f->used = jiffies; |
|
|
|
return f; |
|
} |
|
|
|
/* caller should hold vxlan->hash_lock */ |
|
static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, |
|
union vxlan_addr *ip, __be16 port, |
|
__be32 vni, __u32 ifindex) |
|
{ |
|
struct vxlan_rdst *rd; |
|
|
|
list_for_each_entry(rd, &f->remotes, list) { |
|
if (vxlan_addr_equal(&rd->remote_ip, ip) && |
|
rd->remote_port == port && |
|
rd->remote_vni == vni && |
|
rd->remote_ifindex == ifindex) |
|
return rd; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, |
|
struct switchdev_notifier_vxlan_fdb_info *fdb_info) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
u8 eth_addr[ETH_ALEN + 2] = { 0 }; |
|
struct vxlan_rdst *rdst; |
|
struct vxlan_fdb *f; |
|
int rc = 0; |
|
|
|
if (is_multicast_ether_addr(mac) || |
|
is_zero_ether_addr(mac)) |
|
return -EINVAL; |
|
|
|
ether_addr_copy(eth_addr, mac); |
|
|
|
rcu_read_lock(); |
|
|
|
f = __vxlan_find_mac(vxlan, eth_addr, vni); |
|
if (!f) { |
|
rc = -ENOENT; |
|
goto out; |
|
} |
|
|
|
rdst = first_remote_rcu(f); |
|
vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, NULL, fdb_info); |
|
|
|
out: |
|
rcu_read_unlock(); |
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(vxlan_fdb_find_uc); |
|
|
|
static int vxlan_fdb_notify_one(struct notifier_block *nb, |
|
const struct vxlan_dev *vxlan, |
|
const struct vxlan_fdb *f, |
|
const struct vxlan_rdst *rdst, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct switchdev_notifier_vxlan_fdb_info fdb_info; |
|
int rc; |
|
|
|
vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, extack, &fdb_info); |
|
rc = nb->notifier_call(nb, SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE, |
|
&fdb_info); |
|
return notifier_to_errno(rc); |
|
} |
|
|
|
int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, |
|
struct notifier_block *nb, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_dev *vxlan; |
|
struct vxlan_rdst *rdst; |
|
struct vxlan_fdb *f; |
|
unsigned int h; |
|
int rc = 0; |
|
|
|
if (!netif_is_vxlan(dev)) |
|
return -EINVAL; |
|
vxlan = netdev_priv(dev); |
|
|
|
for (h = 0; h < FDB_HASH_SIZE; ++h) { |
|
spin_lock_bh(&vxlan->hash_lock[h]); |
|
hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) { |
|
if (f->vni == vni) { |
|
list_for_each_entry(rdst, &f->remotes, list) { |
|
rc = vxlan_fdb_notify_one(nb, vxlan, |
|
f, rdst, |
|
extack); |
|
if (rc) |
|
goto unlock; |
|
} |
|
} |
|
} |
|
spin_unlock_bh(&vxlan->hash_lock[h]); |
|
} |
|
return 0; |
|
|
|
unlock: |
|
spin_unlock_bh(&vxlan->hash_lock[h]); |
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(vxlan_fdb_replay); |
|
|
|
void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni) |
|
{ |
|
struct vxlan_dev *vxlan; |
|
struct vxlan_rdst *rdst; |
|
struct vxlan_fdb *f; |
|
unsigned int h; |
|
|
|
if (!netif_is_vxlan(dev)) |
|
return; |
|
vxlan = netdev_priv(dev); |
|
|
|
for (h = 0; h < FDB_HASH_SIZE; ++h) { |
|
spin_lock_bh(&vxlan->hash_lock[h]); |
|
hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) |
|
if (f->vni == vni) |
|
list_for_each_entry(rdst, &f->remotes, list) |
|
rdst->offloaded = false; |
|
spin_unlock_bh(&vxlan->hash_lock[h]); |
|
} |
|
|
|
} |
|
EXPORT_SYMBOL_GPL(vxlan_fdb_clear_offload); |
|
|
|
/* Replace destination of unicast mac */ |
|
static int vxlan_fdb_replace(struct vxlan_fdb *f, |
|
union vxlan_addr *ip, __be16 port, __be32 vni, |
|
__u32 ifindex, struct vxlan_rdst *oldrd) |
|
{ |
|
struct vxlan_rdst *rd; |
|
|
|
rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); |
|
if (rd) |
|
return 0; |
|
|
|
rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); |
|
if (!rd) |
|
return 0; |
|
|
|
*oldrd = *rd; |
|
dst_cache_reset(&rd->dst_cache); |
|
rd->remote_ip = *ip; |
|
rd->remote_port = port; |
|
rd->remote_vni = vni; |
|
rd->remote_ifindex = ifindex; |
|
rd->offloaded = false; |
|
return 1; |
|
} |
|
|
|
/* Add/update destinations for multicast */ |
|
static int vxlan_fdb_append(struct vxlan_fdb *f, |
|
union vxlan_addr *ip, __be16 port, __be32 vni, |
|
__u32 ifindex, struct vxlan_rdst **rdp) |
|
{ |
|
struct vxlan_rdst *rd; |
|
|
|
rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); |
|
if (rd) |
|
return 0; |
|
|
|
rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
|
if (rd == NULL) |
|
return -ENOBUFS; |
|
|
|
if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) { |
|
kfree(rd); |
|
return -ENOBUFS; |
|
} |
|
|
|
rd->remote_ip = *ip; |
|
rd->remote_port = port; |
|
rd->offloaded = false; |
|
rd->remote_vni = vni; |
|
rd->remote_ifindex = ifindex; |
|
|
|
list_add_tail_rcu(&rd->list, &f->remotes); |
|
|
|
*rdp = rd; |
|
return 1; |
|
} |
|
|
|
static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
|
unsigned int off, |
|
struct vxlanhdr *vh, size_t hdrlen, |
|
__be32 vni_field, |
|
struct gro_remcsum *grc, |
|
bool nopartial) |
|
{ |
|
size_t start, offset; |
|
|
|
if (skb->remcsum_offload) |
|
return vh; |
|
|
|
if (!NAPI_GRO_CB(skb)->csum_valid) |
|
return NULL; |
|
|
|
start = vxlan_rco_start(vni_field); |
|
offset = start + vxlan_rco_offset(vni_field); |
|
|
|
vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
|
start, offset, grc, nopartial); |
|
|
|
skb->remcsum_offload = 1; |
|
|
|
return vh; |
|
} |
|
|
|
static struct sk_buff *vxlan_gro_receive(struct sock *sk, |
|
struct list_head *head, |
|
struct sk_buff *skb) |
|
{ |
|
struct sk_buff *pp = NULL; |
|
struct sk_buff *p; |
|
struct vxlanhdr *vh, *vh2; |
|
unsigned int hlen, off_vx; |
|
int flush = 1; |
|
struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk); |
|
__be32 flags; |
|
struct gro_remcsum grc; |
|
|
|
skb_gro_remcsum_init(&grc); |
|
|
|
off_vx = skb_gro_offset(skb); |
|
hlen = off_vx + sizeof(*vh); |
|
vh = skb_gro_header_fast(skb, off_vx); |
|
if (skb_gro_header_hard(skb, hlen)) { |
|
vh = skb_gro_header_slow(skb, hlen, off_vx); |
|
if (unlikely(!vh)) |
|
goto out; |
|
} |
|
|
|
skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
|
|
|
flags = vh->vx_flags; |
|
|
|
if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { |
|
vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), |
|
vh->vx_vni, &grc, |
|
!!(vs->flags & |
|
VXLAN_F_REMCSUM_NOPARTIAL)); |
|
|
|
if (!vh) |
|
goto out; |
|
} |
|
|
|
skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
|
|
|
list_for_each_entry(p, head, list) { |
|
if (!NAPI_GRO_CB(p)->same_flow) |
|
continue; |
|
|
|
vh2 = (struct vxlanhdr *)(p->data + off_vx); |
|
if (vh->vx_flags != vh2->vx_flags || |
|
vh->vx_vni != vh2->vx_vni) { |
|
NAPI_GRO_CB(p)->same_flow = 0; |
|
continue; |
|
} |
|
} |
|
|
|
pp = call_gro_receive(eth_gro_receive, head, skb); |
|
flush = 0; |
|
|
|
out: |
|
skb_gro_flush_final_remcsum(skb, pp, flush, &grc); |
|
|
|
return pp; |
|
} |
|
|
|
static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff) |
|
{ |
|
/* Sets 'skb->inner_mac_header' since we are always called with |
|
* 'skb->encapsulation' set. |
|
*/ |
|
return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
|
} |
|
|
|
static struct vxlan_fdb *vxlan_fdb_alloc(struct vxlan_dev *vxlan, const u8 *mac, |
|
__u16 state, __be32 src_vni, |
|
__u16 ndm_flags) |
|
{ |
|
struct vxlan_fdb *f; |
|
|
|
f = kmalloc(sizeof(*f), GFP_ATOMIC); |
|
if (!f) |
|
return NULL; |
|
f->state = state; |
|
f->flags = ndm_flags; |
|
f->updated = f->used = jiffies; |
|
f->vni = src_vni; |
|
f->nh = NULL; |
|
RCU_INIT_POINTER(f->vdev, vxlan); |
|
INIT_LIST_HEAD(&f->nh_list); |
|
INIT_LIST_HEAD(&f->remotes); |
|
memcpy(f->eth_addr, mac, ETH_ALEN); |
|
|
|
return f; |
|
} |
|
|
|
static void vxlan_fdb_insert(struct vxlan_dev *vxlan, const u8 *mac, |
|
__be32 src_vni, struct vxlan_fdb *f) |
|
{ |
|
++vxlan->addrcnt; |
|
hlist_add_head_rcu(&f->hlist, |
|
vxlan_fdb_head(vxlan, mac, src_vni)); |
|
} |
|
|
|
static int vxlan_fdb_nh_update(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
|
u32 nhid, struct netlink_ext_ack *extack) |
|
{ |
|
struct nexthop *old_nh = rtnl_dereference(fdb->nh); |
|
struct nexthop *nh; |
|
int err = -EINVAL; |
|
|
|
if (old_nh && old_nh->id == nhid) |
|
return 0; |
|
|
|
nh = nexthop_find_by_id(vxlan->net, nhid); |
|
if (!nh) { |
|
NL_SET_ERR_MSG(extack, "Nexthop id does not exist"); |
|
goto err_inval; |
|
} |
|
|
|
if (nh) { |
|
if (!nexthop_get(nh)) { |
|
NL_SET_ERR_MSG(extack, "Nexthop has been deleted"); |
|
nh = NULL; |
|
goto err_inval; |
|
} |
|
if (!nexthop_is_fdb(nh)) { |
|
NL_SET_ERR_MSG(extack, "Nexthop is not a fdb nexthop"); |
|
goto err_inval; |
|
} |
|
|
|
if (!nexthop_is_multipath(nh)) { |
|
NL_SET_ERR_MSG(extack, "Nexthop is not a multipath group"); |
|
goto err_inval; |
|
} |
|
|
|
/* check nexthop group family */ |
|
switch (vxlan->default_dst.remote_ip.sa.sa_family) { |
|
case AF_INET: |
|
if (!nexthop_has_v4(nh)) { |
|
err = -EAFNOSUPPORT; |
|
NL_SET_ERR_MSG(extack, "Nexthop group family not supported"); |
|
goto err_inval; |
|
} |
|
break; |
|
case AF_INET6: |
|
if (nexthop_has_v4(nh)) { |
|
err = -EAFNOSUPPORT; |
|
NL_SET_ERR_MSG(extack, "Nexthop group family not supported"); |
|
goto err_inval; |
|
} |
|
} |
|
} |
|
|
|
if (old_nh) { |
|
list_del_rcu(&fdb->nh_list); |
|
nexthop_put(old_nh); |
|
} |
|
rcu_assign_pointer(fdb->nh, nh); |
|
list_add_tail_rcu(&fdb->nh_list, &nh->fdb_list); |
|
return 1; |
|
|
|
err_inval: |
|
if (nh) |
|
nexthop_put(nh); |
|
return err; |
|
} |
|
|
|
static int vxlan_fdb_create(struct vxlan_dev *vxlan, |
|
const u8 *mac, union vxlan_addr *ip, |
|
__u16 state, __be16 port, __be32 src_vni, |
|
__be32 vni, __u32 ifindex, __u16 ndm_flags, |
|
u32 nhid, struct vxlan_fdb **fdb, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_rdst *rd = NULL; |
|
struct vxlan_fdb *f; |
|
int rc; |
|
|
|
if (vxlan->cfg.addrmax && |
|
vxlan->addrcnt >= vxlan->cfg.addrmax) |
|
return -ENOSPC; |
|
|
|
netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
|
f = vxlan_fdb_alloc(vxlan, mac, state, src_vni, ndm_flags); |
|
if (!f) |
|
return -ENOMEM; |
|
|
|
if (nhid) |
|
rc = vxlan_fdb_nh_update(vxlan, f, nhid, extack); |
|
else |
|
rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
|
if (rc < 0) |
|
goto errout; |
|
|
|
*fdb = f; |
|
|
|
return 0; |
|
|
|
errout: |
|
kfree(f); |
|
return rc; |
|
} |
|
|
|
static void __vxlan_fdb_free(struct vxlan_fdb *f) |
|
{ |
|
struct vxlan_rdst *rd, *nd; |
|
struct nexthop *nh; |
|
|
|
nh = rcu_dereference_raw(f->nh); |
|
if (nh) { |
|
rcu_assign_pointer(f->nh, NULL); |
|
rcu_assign_pointer(f->vdev, NULL); |
|
nexthop_put(nh); |
|
} |
|
|
|
list_for_each_entry_safe(rd, nd, &f->remotes, list) { |
|
dst_cache_destroy(&rd->dst_cache); |
|
kfree(rd); |
|
} |
|
kfree(f); |
|
} |
|
|
|
static void vxlan_fdb_free(struct rcu_head *head) |
|
{ |
|
struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); |
|
|
|
__vxlan_fdb_free(f); |
|
} |
|
|
|
static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f, |
|
bool do_notify, bool swdev_notify) |
|
{ |
|
struct vxlan_rdst *rd; |
|
|
|
netdev_dbg(vxlan->dev, "delete %pM\n", f->eth_addr); |
|
|
|
--vxlan->addrcnt; |
|
if (do_notify) { |
|
if (rcu_access_pointer(f->nh)) |
|
vxlan_fdb_notify(vxlan, f, NULL, RTM_DELNEIGH, |
|
swdev_notify, NULL); |
|
else |
|
list_for_each_entry(rd, &f->remotes, list) |
|
vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH, |
|
swdev_notify, NULL); |
|
} |
|
|
|
hlist_del_rcu(&f->hlist); |
|
list_del_rcu(&f->nh_list); |
|
call_rcu(&f->rcu, vxlan_fdb_free); |
|
} |
|
|
|
static void vxlan_dst_free(struct rcu_head *head) |
|
{ |
|
struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); |
|
|
|
dst_cache_destroy(&rd->dst_cache); |
|
kfree(rd); |
|
} |
|
|
|
static int vxlan_fdb_update_existing(struct vxlan_dev *vxlan, |
|
union vxlan_addr *ip, |
|
__u16 state, __u16 flags, |
|
__be16 port, __be32 vni, |
|
__u32 ifindex, __u16 ndm_flags, |
|
struct vxlan_fdb *f, u32 nhid, |
|
bool swdev_notify, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
__u16 fdb_flags = (ndm_flags & ~NTF_USE); |
|
struct vxlan_rdst *rd = NULL; |
|
struct vxlan_rdst oldrd; |
|
int notify = 0; |
|
int rc = 0; |
|
int err; |
|
|
|
if (nhid && !rcu_access_pointer(f->nh)) { |
|
NL_SET_ERR_MSG(extack, |
|
"Cannot replace an existing non nexthop fdb with a nexthop"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (nhid && (flags & NLM_F_APPEND)) { |
|
NL_SET_ERR_MSG(extack, |
|
"Cannot append to a nexthop fdb"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
/* Do not allow an externally learned entry to take over an entry added |
|
* by the user. |
|
*/ |
|
if (!(fdb_flags & NTF_EXT_LEARNED) || |
|
!(f->flags & NTF_VXLAN_ADDED_BY_USER)) { |
|
if (f->state != state) { |
|
f->state = state; |
|
f->updated = jiffies; |
|
notify = 1; |
|
} |
|
if (f->flags != fdb_flags) { |
|
f->flags = fdb_flags; |
|
f->updated = jiffies; |
|
notify = 1; |
|
} |
|
} |
|
|
|
if ((flags & NLM_F_REPLACE)) { |
|
/* Only change unicasts */ |
|
if (!(is_multicast_ether_addr(f->eth_addr) || |
|
is_zero_ether_addr(f->eth_addr))) { |
|
if (nhid) { |
|
rc = vxlan_fdb_nh_update(vxlan, f, nhid, extack); |
|
if (rc < 0) |
|
return rc; |
|
} else { |
|
rc = vxlan_fdb_replace(f, ip, port, vni, |
|
ifindex, &oldrd); |
|
} |
|
notify |= rc; |
|
} else { |
|
NL_SET_ERR_MSG(extack, "Cannot replace non-unicast fdb entries"); |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
if ((flags & NLM_F_APPEND) && |
|
(is_multicast_ether_addr(f->eth_addr) || |
|
is_zero_ether_addr(f->eth_addr))) { |
|
rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
|
|
|
if (rc < 0) |
|
return rc; |
|
notify |= rc; |
|
} |
|
|
|
if (ndm_flags & NTF_USE) |
|
f->used = jiffies; |
|
|
|
if (notify) { |
|
if (rd == NULL) |
|
rd = first_remote_rtnl(f); |
|
|
|
err = vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH, |
|
swdev_notify, extack); |
|
if (err) |
|
goto err_notify; |
|
} |
|
|
|
return 0; |
|
|
|
err_notify: |
|
if (nhid) |
|
return err; |
|
if ((flags & NLM_F_REPLACE) && rc) |
|
*rd = oldrd; |
|
else if ((flags & NLM_F_APPEND) && rc) { |
|
list_del_rcu(&rd->list); |
|
call_rcu(&rd->rcu, vxlan_dst_free); |
|
} |
|
return err; |
|
} |
|
|
|
static int vxlan_fdb_update_create(struct vxlan_dev *vxlan, |
|
const u8 *mac, union vxlan_addr *ip, |
|
__u16 state, __u16 flags, |
|
__be16 port, __be32 src_vni, __be32 vni, |
|
__u32 ifindex, __u16 ndm_flags, u32 nhid, |
|
bool swdev_notify, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
__u16 fdb_flags = (ndm_flags & ~NTF_USE); |
|
struct vxlan_fdb *f; |
|
int rc; |
|
|
|
/* Disallow replace to add a multicast entry */ |
|
if ((flags & NLM_F_REPLACE) && |
|
(is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) |
|
return -EOPNOTSUPP; |
|
|
|
netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
|
rc = vxlan_fdb_create(vxlan, mac, ip, state, port, src_vni, |
|
vni, ifindex, fdb_flags, nhid, &f, extack); |
|
if (rc < 0) |
|
return rc; |
|
|
|
vxlan_fdb_insert(vxlan, mac, src_vni, f); |
|
rc = vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_NEWNEIGH, |
|
swdev_notify, extack); |
|
if (rc) |
|
goto err_notify; |
|
|
|
return 0; |
|
|
|
err_notify: |
|
vxlan_fdb_destroy(vxlan, f, false, false); |
|
return rc; |
|
} |
|
|
|
/* Add new entry to forwarding table -- assumes lock held */ |
|
static int vxlan_fdb_update(struct vxlan_dev *vxlan, |
|
const u8 *mac, union vxlan_addr *ip, |
|
__u16 state, __u16 flags, |
|
__be16 port, __be32 src_vni, __be32 vni, |
|
__u32 ifindex, __u16 ndm_flags, u32 nhid, |
|
bool swdev_notify, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_fdb *f; |
|
|
|
f = __vxlan_find_mac(vxlan, mac, src_vni); |
|
if (f) { |
|
if (flags & NLM_F_EXCL) { |
|
netdev_dbg(vxlan->dev, |
|
"lost race to create %pM\n", mac); |
|
return -EEXIST; |
|
} |
|
|
|
return vxlan_fdb_update_existing(vxlan, ip, state, flags, port, |
|
vni, ifindex, ndm_flags, f, |
|
nhid, swdev_notify, extack); |
|
} else { |
|
if (!(flags & NLM_F_CREATE)) |
|
return -ENOENT; |
|
|
|
return vxlan_fdb_update_create(vxlan, mac, ip, state, flags, |
|
port, src_vni, vni, ifindex, |
|
ndm_flags, nhid, swdev_notify, |
|
extack); |
|
} |
|
} |
|
|
|
static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f, |
|
struct vxlan_rdst *rd, bool swdev_notify) |
|
{ |
|
list_del_rcu(&rd->list); |
|
vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH, swdev_notify, NULL); |
|
call_rcu(&rd->rcu, vxlan_dst_free); |
|
} |
|
|
|
static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
|
union vxlan_addr *ip, __be16 *port, __be32 *src_vni, |
|
__be32 *vni, u32 *ifindex, u32 *nhid) |
|
{ |
|
struct net *net = dev_net(vxlan->dev); |
|
int err; |
|
|
|
if (tb[NDA_NH_ID] && (tb[NDA_DST] || tb[NDA_VNI] || tb[NDA_IFINDEX] || |
|
tb[NDA_PORT])) |
|
return -EINVAL; |
|
|
|
if (tb[NDA_DST]) { |
|
err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
|
if (err) |
|
return err; |
|
} else { |
|
union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
|
|
|
if (remote->sa.sa_family == AF_INET) { |
|
ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); |
|
ip->sa.sa_family = AF_INET; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
ip->sin6.sin6_addr = in6addr_any; |
|
ip->sa.sa_family = AF_INET6; |
|
#endif |
|
} |
|
} |
|
|
|
if (tb[NDA_PORT]) { |
|
if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
|
return -EINVAL; |
|
*port = nla_get_be16(tb[NDA_PORT]); |
|
} else { |
|
*port = vxlan->cfg.dst_port; |
|
} |
|
|
|
if (tb[NDA_VNI]) { |
|
if (nla_len(tb[NDA_VNI]) != sizeof(u32)) |
|
return -EINVAL; |
|
*vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
|
} else { |
|
*vni = vxlan->default_dst.remote_vni; |
|
} |
|
|
|
if (tb[NDA_SRC_VNI]) { |
|
if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32)) |
|
return -EINVAL; |
|
*src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI])); |
|
} else { |
|
*src_vni = vxlan->default_dst.remote_vni; |
|
} |
|
|
|
if (tb[NDA_IFINDEX]) { |
|
struct net_device *tdev; |
|
|
|
if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) |
|
return -EINVAL; |
|
*ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
|
tdev = __dev_get_by_index(net, *ifindex); |
|
if (!tdev) |
|
return -EADDRNOTAVAIL; |
|
} else { |
|
*ifindex = 0; |
|
} |
|
|
|
if (tb[NDA_NH_ID]) |
|
*nhid = nla_get_u32(tb[NDA_NH_ID]); |
|
else |
|
*nhid = 0; |
|
|
|
return 0; |
|
} |
|
|
|
/* Add static entry (via netlink) */ |
|
static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
|
struct net_device *dev, |
|
const unsigned char *addr, u16 vid, u16 flags, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
/* struct net *net = dev_net(vxlan->dev); */ |
|
union vxlan_addr ip; |
|
__be16 port; |
|
__be32 src_vni, vni; |
|
u32 ifindex, nhid; |
|
u32 hash_index; |
|
int err; |
|
|
|
if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { |
|
pr_info("RTM_NEWNEIGH with invalid state %#x\n", |
|
ndm->ndm_state); |
|
return -EINVAL; |
|
} |
|
|
|
if (!tb || (!tb[NDA_DST] && !tb[NDA_NH_ID])) |
|
return -EINVAL; |
|
|
|
err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex, |
|
&nhid); |
|
if (err) |
|
return err; |
|
|
|
if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
|
return -EAFNOSUPPORT; |
|
|
|
hash_index = fdb_head_index(vxlan, addr, src_vni); |
|
spin_lock_bh(&vxlan->hash_lock[hash_index]); |
|
err = vxlan_fdb_update(vxlan, addr, &ip, ndm->ndm_state, flags, |
|
port, src_vni, vni, ifindex, |
|
ndm->ndm_flags | NTF_VXLAN_ADDED_BY_USER, |
|
nhid, true, extack); |
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
|
|
return err; |
|
} |
|
|
|
static int __vxlan_fdb_delete(struct vxlan_dev *vxlan, |
|
const unsigned char *addr, union vxlan_addr ip, |
|
__be16 port, __be32 src_vni, __be32 vni, |
|
u32 ifindex, bool swdev_notify) |
|
{ |
|
struct vxlan_rdst *rd = NULL; |
|
struct vxlan_fdb *f; |
|
int err = -ENOENT; |
|
|
|
f = vxlan_find_mac(vxlan, addr, src_vni); |
|
if (!f) |
|
return err; |
|
|
|
if (!vxlan_addr_any(&ip)) { |
|
rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); |
|
if (!rd) |
|
goto out; |
|
} |
|
|
|
/* remove a destination if it's not the only one on the list, |
|
* otherwise destroy the fdb entry |
|
*/ |
|
if (rd && !list_is_singular(&f->remotes)) { |
|
vxlan_fdb_dst_destroy(vxlan, f, rd, swdev_notify); |
|
goto out; |
|
} |
|
|
|
vxlan_fdb_destroy(vxlan, f, true, swdev_notify); |
|
|
|
out: |
|
return 0; |
|
} |
|
|
|
/* Delete entry (via netlink) */ |
|
static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
|
struct net_device *dev, |
|
const unsigned char *addr, u16 vid) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
union vxlan_addr ip; |
|
__be32 src_vni, vni; |
|
u32 ifindex, nhid; |
|
u32 hash_index; |
|
__be16 port; |
|
int err; |
|
|
|
err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex, |
|
&nhid); |
|
if (err) |
|
return err; |
|
|
|
hash_index = fdb_head_index(vxlan, addr, src_vni); |
|
spin_lock_bh(&vxlan->hash_lock[hash_index]); |
|
err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex, |
|
true); |
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
|
|
return err; |
|
} |
|
|
|
/* Dump forwarding table */ |
|
static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, |
|
struct net_device *dev, |
|
struct net_device *filter_dev, int *idx) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
unsigned int h; |
|
int err = 0; |
|
|
|
for (h = 0; h < FDB_HASH_SIZE; ++h) { |
|
struct vxlan_fdb *f; |
|
|
|
rcu_read_lock(); |
|
hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
|
struct vxlan_rdst *rd; |
|
|
|
if (rcu_access_pointer(f->nh)) { |
|
if (*idx < cb->args[2]) |
|
goto skip_nh; |
|
err = vxlan_fdb_info(skb, vxlan, f, |
|
NETLINK_CB(cb->skb).portid, |
|
cb->nlh->nlmsg_seq, |
|
RTM_NEWNEIGH, |
|
NLM_F_MULTI, NULL); |
|
if (err < 0) { |
|
rcu_read_unlock(); |
|
goto out; |
|
} |
|
skip_nh: |
|
*idx += 1; |
|
continue; |
|
} |
|
|
|
list_for_each_entry_rcu(rd, &f->remotes, list) { |
|
if (*idx < cb->args[2]) |
|
goto skip; |
|
|
|
err = vxlan_fdb_info(skb, vxlan, f, |
|
NETLINK_CB(cb->skb).portid, |
|
cb->nlh->nlmsg_seq, |
|
RTM_NEWNEIGH, |
|
NLM_F_MULTI, rd); |
|
if (err < 0) { |
|
rcu_read_unlock(); |
|
goto out; |
|
} |
|
skip: |
|
*idx += 1; |
|
} |
|
} |
|
rcu_read_unlock(); |
|
} |
|
out: |
|
return err; |
|
} |
|
|
|
static int vxlan_fdb_get(struct sk_buff *skb, |
|
struct nlattr *tb[], |
|
struct net_device *dev, |
|
const unsigned char *addr, |
|
u16 vid, u32 portid, u32 seq, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_fdb *f; |
|
__be32 vni; |
|
int err; |
|
|
|
if (tb[NDA_VNI]) |
|
vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
|
else |
|
vni = vxlan->default_dst.remote_vni; |
|
|
|
rcu_read_lock(); |
|
|
|
f = __vxlan_find_mac(vxlan, addr, vni); |
|
if (!f) { |
|
NL_SET_ERR_MSG(extack, "Fdb entry not found"); |
|
err = -ENOENT; |
|
goto errout; |
|
} |
|
|
|
err = vxlan_fdb_info(skb, vxlan, f, portid, seq, |
|
RTM_NEWNEIGH, 0, first_remote_rcu(f)); |
|
errout: |
|
rcu_read_unlock(); |
|
return err; |
|
} |
|
|
|
/* Watch incoming packets to learn mapping between Ethernet address |
|
* and Tunnel endpoint. |
|
* Return true if packet is bogus and should be dropped. |
|
*/ |
|
static bool vxlan_snoop(struct net_device *dev, |
|
union vxlan_addr *src_ip, const u8 *src_mac, |
|
u32 src_ifindex, __be32 vni) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_fdb *f; |
|
u32 ifindex = 0; |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
if (src_ip->sa.sa_family == AF_INET6 && |
|
(ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)) |
|
ifindex = src_ifindex; |
|
#endif |
|
|
|
f = vxlan_find_mac(vxlan, src_mac, vni); |
|
if (likely(f)) { |
|
struct vxlan_rdst *rdst = first_remote_rcu(f); |
|
|
|
if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) && |
|
rdst->remote_ifindex == ifindex)) |
|
return false; |
|
|
|
/* Don't migrate static entries, drop packets */ |
|
if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
|
return true; |
|
|
|
/* Don't override an fdb with nexthop with a learnt entry */ |
|
if (rcu_access_pointer(f->nh)) |
|
return true; |
|
|
|
if (net_ratelimit()) |
|
netdev_info(dev, |
|
"%pM migrated from %pIS to %pIS\n", |
|
src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
|
|
|
rdst->remote_ip = *src_ip; |
|
f->updated = jiffies; |
|
vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH, true, NULL); |
|
} else { |
|
u32 hash_index = fdb_head_index(vxlan, src_mac, vni); |
|
|
|
/* learned new entry */ |
|
spin_lock(&vxlan->hash_lock[hash_index]); |
|
|
|
/* close off race between vxlan_flush and incoming packets */ |
|
if (netif_running(dev)) |
|
vxlan_fdb_update(vxlan, src_mac, src_ip, |
|
NUD_REACHABLE, |
|
NLM_F_EXCL|NLM_F_CREATE, |
|
vxlan->cfg.dst_port, |
|
vni, |
|
vxlan->default_dst.remote_vni, |
|
ifindex, NTF_SELF, 0, true, NULL); |
|
spin_unlock(&vxlan->hash_lock[hash_index]); |
|
} |
|
|
|
return false; |
|
} |
|
|
|
/* See if multicast group is already in use by other ID */ |
|
static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
|
{ |
|
struct vxlan_dev *vxlan; |
|
struct vxlan_sock *sock4; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
struct vxlan_sock *sock6; |
|
#endif |
|
unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
|
|
|
sock4 = rtnl_dereference(dev->vn4_sock); |
|
|
|
/* The vxlan_sock is only used by dev, leaving group has |
|
* no effect on other vxlan devices. |
|
*/ |
|
if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1) |
|
return false; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
sock6 = rtnl_dereference(dev->vn6_sock); |
|
if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1) |
|
return false; |
|
#endif |
|
|
|
list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
|
if (!netif_running(vxlan->dev) || vxlan == dev) |
|
continue; |
|
|
|
if (family == AF_INET && |
|
rtnl_dereference(vxlan->vn4_sock) != sock4) |
|
continue; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
if (family == AF_INET6 && |
|
rtnl_dereference(vxlan->vn6_sock) != sock6) |
|
continue; |
|
#endif |
|
|
|
if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, |
|
&dev->default_dst.remote_ip)) |
|
continue; |
|
|
|
if (vxlan->default_dst.remote_ifindex != |
|
dev->default_dst.remote_ifindex) |
|
continue; |
|
|
|
return true; |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static bool __vxlan_sock_release_prep(struct vxlan_sock *vs) |
|
{ |
|
struct vxlan_net *vn; |
|
|
|
if (!vs) |
|
return false; |
|
if (!refcount_dec_and_test(&vs->refcnt)) |
|
return false; |
|
|
|
vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
|
spin_lock(&vn->sock_lock); |
|
hlist_del_rcu(&vs->hlist); |
|
udp_tunnel_notify_del_rx_port(vs->sock, |
|
(vs->flags & VXLAN_F_GPE) ? |
|
UDP_TUNNEL_TYPE_VXLAN_GPE : |
|
UDP_TUNNEL_TYPE_VXLAN); |
|
spin_unlock(&vn->sock_lock); |
|
|
|
return true; |
|
} |
|
|
|
static void vxlan_sock_release(struct vxlan_dev *vxlan) |
|
{ |
|
struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
|
|
|
RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
|
#endif |
|
|
|
RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
|
synchronize_net(); |
|
|
|
vxlan_vs_del_dev(vxlan); |
|
|
|
if (__vxlan_sock_release_prep(sock4)) { |
|
udp_tunnel_sock_release(sock4->sock); |
|
kfree(sock4); |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
if (__vxlan_sock_release_prep(sock6)) { |
|
udp_tunnel_sock_release(sock6->sock); |
|
kfree(sock6); |
|
} |
|
#endif |
|
} |
|
|
|
/* Update multicast group membership when first VNI on |
|
* multicast address is brought up |
|
*/ |
|
static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
|
{ |
|
struct sock *sk; |
|
union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
|
int ifindex = vxlan->default_dst.remote_ifindex; |
|
int ret = -EINVAL; |
|
|
|
if (ip->sa.sa_family == AF_INET) { |
|
struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
|
struct ip_mreqn mreq = { |
|
.imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, |
|
.imr_ifindex = ifindex, |
|
}; |
|
|
|
sk = sock4->sock->sk; |
|
lock_sock(sk); |
|
ret = ip_mc_join_group(sk, &mreq); |
|
release_sock(sk); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
|
|
|
sk = sock6->sock->sk; |
|
lock_sock(sk); |
|
ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
|
&ip->sin6.sin6_addr); |
|
release_sock(sk); |
|
#endif |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/* Inverse of vxlan_igmp_join when last VNI is brought down */ |
|
static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
|
{ |
|
struct sock *sk; |
|
union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
|
int ifindex = vxlan->default_dst.remote_ifindex; |
|
int ret = -EINVAL; |
|
|
|
if (ip->sa.sa_family == AF_INET) { |
|
struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
|
struct ip_mreqn mreq = { |
|
.imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, |
|
.imr_ifindex = ifindex, |
|
}; |
|
|
|
sk = sock4->sock->sk; |
|
lock_sock(sk); |
|
ret = ip_mc_leave_group(sk, &mreq); |
|
release_sock(sk); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
|
|
|
sk = sock6->sock->sk; |
|
lock_sock(sk); |
|
ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
|
&ip->sin6.sin6_addr); |
|
release_sock(sk); |
|
#endif |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static bool vxlan_remcsum(struct vxlanhdr *unparsed, |
|
struct sk_buff *skb, u32 vxflags) |
|
{ |
|
size_t start, offset; |
|
|
|
if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload) |
|
goto out; |
|
|
|
start = vxlan_rco_start(unparsed->vx_vni); |
|
offset = start + vxlan_rco_offset(unparsed->vx_vni); |
|
|
|
if (!pskb_may_pull(skb, offset + sizeof(u16))) |
|
return false; |
|
|
|
skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset, |
|
!!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL)); |
|
out: |
|
unparsed->vx_flags &= ~VXLAN_HF_RCO; |
|
unparsed->vx_vni &= VXLAN_VNI_MASK; |
|
return true; |
|
} |
|
|
|
static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, |
|
struct sk_buff *skb, u32 vxflags, |
|
struct vxlan_metadata *md) |
|
{ |
|
struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed; |
|
struct metadata_dst *tun_dst; |
|
|
|
if (!(unparsed->vx_flags & VXLAN_HF_GBP)) |
|
goto out; |
|
|
|
md->gbp = ntohs(gbp->policy_id); |
|
|
|
tun_dst = (struct metadata_dst *)skb_dst(skb); |
|
if (tun_dst) { |
|
tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
|
tun_dst->u.tun_info.options_len = sizeof(*md); |
|
} |
|
if (gbp->dont_learn) |
|
md->gbp |= VXLAN_GBP_DONT_LEARN; |
|
|
|
if (gbp->policy_applied) |
|
md->gbp |= VXLAN_GBP_POLICY_APPLIED; |
|
|
|
/* In flow-based mode, GBP is carried in dst_metadata */ |
|
if (!(vxflags & VXLAN_F_COLLECT_METADATA)) |
|
skb->mark = md->gbp; |
|
out: |
|
unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; |
|
} |
|
|
|
static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed, |
|
__be16 *protocol, |
|
struct sk_buff *skb, u32 vxflags) |
|
{ |
|
struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed; |
|
|
|
/* Need to have Next Protocol set for interfaces in GPE mode. */ |
|
if (!gpe->np_applied) |
|
return false; |
|
/* "The initial version is 0. If a receiver does not support the |
|
* version indicated it MUST drop the packet. |
|
*/ |
|
if (gpe->version != 0) |
|
return false; |
|
/* "When the O bit is set to 1, the packet is an OAM packet and OAM |
|
* processing MUST occur." However, we don't implement OAM |
|
* processing, thus drop the packet. |
|
*/ |
|
if (gpe->oam_flag) |
|
return false; |
|
|
|
*protocol = tun_p_to_eth_p(gpe->next_protocol); |
|
if (!*protocol) |
|
return false; |
|
|
|
unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS; |
|
return true; |
|
} |
|
|
|
static bool vxlan_set_mac(struct vxlan_dev *vxlan, |
|
struct vxlan_sock *vs, |
|
struct sk_buff *skb, __be32 vni) |
|
{ |
|
union vxlan_addr saddr; |
|
u32 ifindex = skb->dev->ifindex; |
|
|
|
skb_reset_mac_header(skb); |
|
skb->protocol = eth_type_trans(skb, vxlan->dev); |
|
skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
|
|
|
/* Ignore packet loops (and multicast echo) */ |
|
if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) |
|
return false; |
|
|
|
/* Get address from the outer IP header */ |
|
if (vxlan_get_sk_family(vs) == AF_INET) { |
|
saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
|
saddr.sa.sa_family = AF_INET; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
|
saddr.sa.sa_family = AF_INET6; |
|
#endif |
|
} |
|
|
|
if ((vxlan->cfg.flags & VXLAN_F_LEARN) && |
|
vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni)) |
|
return false; |
|
|
|
return true; |
|
} |
|
|
|
static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, |
|
struct sk_buff *skb) |
|
{ |
|
int err = 0; |
|
|
|
if (vxlan_get_sk_family(vs) == AF_INET) |
|
err = IP_ECN_decapsulate(oiph, skb); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
else |
|
err = IP6_ECN_decapsulate(oiph, skb); |
|
#endif |
|
|
|
if (unlikely(err) && log_ecn_error) { |
|
if (vxlan_get_sk_family(vs) == AF_INET) |
|
net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", |
|
&((struct iphdr *)oiph)->saddr, |
|
((struct iphdr *)oiph)->tos); |
|
else |
|
net_info_ratelimited("non-ECT from %pI6\n", |
|
&((struct ipv6hdr *)oiph)->saddr); |
|
} |
|
return err <= 1; |
|
} |
|
|
|
/* Callback from net/ipv4/udp.c to receive packets */ |
|
static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) |
|
{ |
|
struct vxlan_dev *vxlan; |
|
struct vxlan_sock *vs; |
|
struct vxlanhdr unparsed; |
|
struct vxlan_metadata _md; |
|
struct vxlan_metadata *md = &_md; |
|
__be16 protocol = htons(ETH_P_TEB); |
|
bool raw_proto = false; |
|
void *oiph; |
|
__be32 vni = 0; |
|
|
|
/* Need UDP and VXLAN header to be present */ |
|
if (!pskb_may_pull(skb, VXLAN_HLEN)) |
|
goto drop; |
|
|
|
unparsed = *vxlan_hdr(skb); |
|
/* VNI flag always required to be set */ |
|
if (!(unparsed.vx_flags & VXLAN_HF_VNI)) { |
|
netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", |
|
ntohl(vxlan_hdr(skb)->vx_flags), |
|
ntohl(vxlan_hdr(skb)->vx_vni)); |
|
/* Return non vxlan pkt */ |
|
goto drop; |
|
} |
|
unparsed.vx_flags &= ~VXLAN_HF_VNI; |
|
unparsed.vx_vni &= ~VXLAN_VNI_MASK; |
|
|
|
vs = rcu_dereference_sk_user_data(sk); |
|
if (!vs) |
|
goto drop; |
|
|
|
vni = vxlan_vni(vxlan_hdr(skb)->vx_vni); |
|
|
|
vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni); |
|
if (!vxlan) |
|
goto drop; |
|
|
|
/* For backwards compatibility, only allow reserved fields to be |
|
* used by VXLAN extensions if explicitly requested. |
|
*/ |
|
if (vs->flags & VXLAN_F_GPE) { |
|
if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags)) |
|
goto drop; |
|
raw_proto = true; |
|
} |
|
|
|
if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto, |
|
!net_eq(vxlan->net, dev_net(vxlan->dev)))) |
|
goto drop; |
|
|
|
if (vs->flags & VXLAN_F_REMCSUM_RX) |
|
if (unlikely(!vxlan_remcsum(&unparsed, skb, vs->flags))) |
|
goto drop; |
|
|
|
if (vxlan_collect_metadata(vs)) { |
|
struct metadata_dst *tun_dst; |
|
|
|
tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
|
key32_to_tunnel_id(vni), sizeof(*md)); |
|
|
|
if (!tun_dst) |
|
goto drop; |
|
|
|
md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
|
|
|
skb_dst_set(skb, (struct dst_entry *)tun_dst); |
|
} else { |
|
memset(md, 0, sizeof(*md)); |
|
} |
|
|
|
if (vs->flags & VXLAN_F_GBP) |
|
vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md); |
|
/* Note that GBP and GPE can never be active together. This is |
|
* ensured in vxlan_dev_configure. |
|
*/ |
|
|
|
if (unparsed.vx_flags || unparsed.vx_vni) { |
|
/* If there are any unprocessed flags remaining treat |
|
* this as a malformed packet. This behavior diverges from |
|
* VXLAN RFC (RFC7348) which stipulates that bits in reserved |
|
* in reserved fields are to be ignored. The approach here |
|
* maintains compatibility with previous stack code, and also |
|
* is more robust and provides a little more security in |
|
* adding extensions to VXLAN. |
|
*/ |
|
goto drop; |
|
} |
|
|
|
if (!raw_proto) { |
|
if (!vxlan_set_mac(vxlan, vs, skb, vni)) |
|
goto drop; |
|
} else { |
|
skb_reset_mac_header(skb); |
|
skb->dev = vxlan->dev; |
|
skb->pkt_type = PACKET_HOST; |
|
} |
|
|
|
oiph = skb_network_header(skb); |
|
skb_reset_network_header(skb); |
|
|
|
if (!vxlan_ecn_decapsulate(vs, oiph, skb)) { |
|
++vxlan->dev->stats.rx_frame_errors; |
|
++vxlan->dev->stats.rx_errors; |
|
goto drop; |
|
} |
|
|
|
rcu_read_lock(); |
|
|
|
if (unlikely(!(vxlan->dev->flags & IFF_UP))) { |
|
rcu_read_unlock(); |
|
atomic_long_inc(&vxlan->dev->rx_dropped); |
|
goto drop; |
|
} |
|
|
|
dev_sw_netstats_rx_add(vxlan->dev, skb->len); |
|
gro_cells_receive(&vxlan->gro_cells, skb); |
|
|
|
rcu_read_unlock(); |
|
|
|
return 0; |
|
|
|
drop: |
|
/* Consume bad packet */ |
|
kfree_skb(skb); |
|
return 0; |
|
} |
|
|
|
/* Callback from net/ipv{4,6}/udp.c to check that we have a VNI for errors */ |
|
static int vxlan_err_lookup(struct sock *sk, struct sk_buff *skb) |
|
{ |
|
struct vxlan_dev *vxlan; |
|
struct vxlan_sock *vs; |
|
struct vxlanhdr *hdr; |
|
__be32 vni; |
|
|
|
if (!pskb_may_pull(skb, skb_transport_offset(skb) + VXLAN_HLEN)) |
|
return -EINVAL; |
|
|
|
hdr = vxlan_hdr(skb); |
|
|
|
if (!(hdr->vx_flags & VXLAN_HF_VNI)) |
|
return -EINVAL; |
|
|
|
vs = rcu_dereference_sk_user_data(sk); |
|
if (!vs) |
|
return -ENOENT; |
|
|
|
vni = vxlan_vni(hdr->vx_vni); |
|
vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni); |
|
if (!vxlan) |
|
return -ENOENT; |
|
|
|
return 0; |
|
} |
|
|
|
static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct arphdr *parp; |
|
u8 *arpptr, *sha; |
|
__be32 sip, tip; |
|
struct neighbour *n; |
|
|
|
if (dev->flags & IFF_NOARP) |
|
goto out; |
|
|
|
if (!pskb_may_pull(skb, arp_hdr_len(dev))) { |
|
dev->stats.tx_dropped++; |
|
goto out; |
|
} |
|
parp = arp_hdr(skb); |
|
|
|
if ((parp->ar_hrd != htons(ARPHRD_ETHER) && |
|
parp->ar_hrd != htons(ARPHRD_IEEE802)) || |
|
parp->ar_pro != htons(ETH_P_IP) || |
|
parp->ar_op != htons(ARPOP_REQUEST) || |
|
parp->ar_hln != dev->addr_len || |
|
parp->ar_pln != 4) |
|
goto out; |
|
arpptr = (u8 *)parp + sizeof(struct arphdr); |
|
sha = arpptr; |
|
arpptr += dev->addr_len; /* sha */ |
|
memcpy(&sip, arpptr, sizeof(sip)); |
|
arpptr += sizeof(sip); |
|
arpptr += dev->addr_len; /* tha */ |
|
memcpy(&tip, arpptr, sizeof(tip)); |
|
|
|
if (ipv4_is_loopback(tip) || |
|
ipv4_is_multicast(tip)) |
|
goto out; |
|
|
|
n = neigh_lookup(&arp_tbl, &tip, dev); |
|
|
|
if (n) { |
|
struct vxlan_fdb *f; |
|
struct sk_buff *reply; |
|
|
|
if (!(n->nud_state & NUD_CONNECTED)) { |
|
neigh_release(n); |
|
goto out; |
|
} |
|
|
|
f = vxlan_find_mac(vxlan, n->ha, vni); |
|
if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
|
/* bridge-local neighbor */ |
|
neigh_release(n); |
|
goto out; |
|
} |
|
|
|
reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, |
|
n->ha, sha); |
|
|
|
neigh_release(n); |
|
|
|
if (reply == NULL) |
|
goto out; |
|
|
|
skb_reset_mac_header(reply); |
|
__skb_pull(reply, skb_network_offset(reply)); |
|
reply->ip_summed = CHECKSUM_UNNECESSARY; |
|
reply->pkt_type = PACKET_HOST; |
|
|
|
if (netif_rx_ni(reply) == NET_RX_DROP) |
|
dev->stats.rx_dropped++; |
|
} else if (vxlan->cfg.flags & VXLAN_F_L3MISS) { |
|
union vxlan_addr ipa = { |
|
.sin.sin_addr.s_addr = tip, |
|
.sin.sin_family = AF_INET, |
|
}; |
|
|
|
vxlan_ip_miss(dev, &ipa); |
|
} |
|
out: |
|
consume_skb(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
|
struct neighbour *n, bool isrouter) |
|
{ |
|
struct net_device *dev = request->dev; |
|
struct sk_buff *reply; |
|
struct nd_msg *ns, *na; |
|
struct ipv6hdr *pip6; |
|
u8 *daddr; |
|
int na_olen = 8; /* opt hdr + ETH_ALEN for target */ |
|
int ns_olen; |
|
int i, len; |
|
|
|
if (dev == NULL || !pskb_may_pull(request, request->len)) |
|
return NULL; |
|
|
|
len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + |
|
sizeof(*na) + na_olen + dev->needed_tailroom; |
|
reply = alloc_skb(len, GFP_ATOMIC); |
|
if (reply == NULL) |
|
return NULL; |
|
|
|
reply->protocol = htons(ETH_P_IPV6); |
|
reply->dev = dev; |
|
skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); |
|
skb_push(reply, sizeof(struct ethhdr)); |
|
skb_reset_mac_header(reply); |
|
|
|
ns = (struct nd_msg *)(ipv6_hdr(request) + 1); |
|
|
|
daddr = eth_hdr(request)->h_source; |
|
ns_olen = request->len - skb_network_offset(request) - |
|
sizeof(struct ipv6hdr) - sizeof(*ns); |
|
for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { |
|
if (!ns->opt[i + 1]) { |
|
kfree_skb(reply); |
|
return NULL; |
|
} |
|
if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { |
|
daddr = ns->opt + i + sizeof(struct nd_opt_hdr); |
|
break; |
|
} |
|
} |
|
|
|
/* Ethernet header */ |
|
ether_addr_copy(eth_hdr(reply)->h_dest, daddr); |
|
ether_addr_copy(eth_hdr(reply)->h_source, n->ha); |
|
eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); |
|
reply->protocol = htons(ETH_P_IPV6); |
|
|
|
skb_pull(reply, sizeof(struct ethhdr)); |
|
skb_reset_network_header(reply); |
|
skb_put(reply, sizeof(struct ipv6hdr)); |
|
|
|
/* IPv6 header */ |
|
|
|
pip6 = ipv6_hdr(reply); |
|
memset(pip6, 0, sizeof(struct ipv6hdr)); |
|
pip6->version = 6; |
|
pip6->priority = ipv6_hdr(request)->priority; |
|
pip6->nexthdr = IPPROTO_ICMPV6; |
|
pip6->hop_limit = 255; |
|
pip6->daddr = ipv6_hdr(request)->saddr; |
|
pip6->saddr = *(struct in6_addr *)n->primary_key; |
|
|
|
skb_pull(reply, sizeof(struct ipv6hdr)); |
|
skb_reset_transport_header(reply); |
|
|
|
/* Neighbor Advertisement */ |
|
na = skb_put_zero(reply, sizeof(*na) + na_olen); |
|
na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; |
|
na->icmph.icmp6_router = isrouter; |
|
na->icmph.icmp6_override = 1; |
|
na->icmph.icmp6_solicited = 1; |
|
na->target = ns->target; |
|
ether_addr_copy(&na->opt[2], n->ha); |
|
na->opt[0] = ND_OPT_TARGET_LL_ADDR; |
|
na->opt[1] = na_olen >> 3; |
|
|
|
na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, |
|
&pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, |
|
csum_partial(na, sizeof(*na)+na_olen, 0)); |
|
|
|
pip6->payload_len = htons(sizeof(*na)+na_olen); |
|
|
|
skb_push(reply, sizeof(struct ipv6hdr)); |
|
|
|
reply->ip_summed = CHECKSUM_UNNECESSARY; |
|
|
|
return reply; |
|
} |
|
|
|
static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
const struct in6_addr *daddr; |
|
const struct ipv6hdr *iphdr; |
|
struct inet6_dev *in6_dev; |
|
struct neighbour *n; |
|
struct nd_msg *msg; |
|
|
|
in6_dev = __in6_dev_get(dev); |
|
if (!in6_dev) |
|
goto out; |
|
|
|
iphdr = ipv6_hdr(skb); |
|
daddr = &iphdr->daddr; |
|
msg = (struct nd_msg *)(iphdr + 1); |
|
|
|
if (ipv6_addr_loopback(daddr) || |
|
ipv6_addr_is_multicast(&msg->target)) |
|
goto out; |
|
|
|
n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); |
|
|
|
if (n) { |
|
struct vxlan_fdb *f; |
|
struct sk_buff *reply; |
|
|
|
if (!(n->nud_state & NUD_CONNECTED)) { |
|
neigh_release(n); |
|
goto out; |
|
} |
|
|
|
f = vxlan_find_mac(vxlan, n->ha, vni); |
|
if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
|
/* bridge-local neighbor */ |
|
neigh_release(n); |
|
goto out; |
|
} |
|
|
|
reply = vxlan_na_create(skb, n, |
|
!!(f ? f->flags & NTF_ROUTER : 0)); |
|
|
|
neigh_release(n); |
|
|
|
if (reply == NULL) |
|
goto out; |
|
|
|
if (netif_rx_ni(reply) == NET_RX_DROP) |
|
dev->stats.rx_dropped++; |
|
|
|
} else if (vxlan->cfg.flags & VXLAN_F_L3MISS) { |
|
union vxlan_addr ipa = { |
|
.sin6.sin6_addr = msg->target, |
|
.sin6.sin6_family = AF_INET6, |
|
}; |
|
|
|
vxlan_ip_miss(dev, &ipa); |
|
} |
|
|
|
out: |
|
consume_skb(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
#endif |
|
|
|
static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct neighbour *n; |
|
|
|
if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) |
|
return false; |
|
|
|
n = NULL; |
|
switch (ntohs(eth_hdr(skb)->h_proto)) { |
|
case ETH_P_IP: |
|
{ |
|
struct iphdr *pip; |
|
|
|
if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
|
return false; |
|
pip = ip_hdr(skb); |
|
n = neigh_lookup(&arp_tbl, &pip->daddr, dev); |
|
if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) { |
|
union vxlan_addr ipa = { |
|
.sin.sin_addr.s_addr = pip->daddr, |
|
.sin.sin_family = AF_INET, |
|
}; |
|
|
|
vxlan_ip_miss(dev, &ipa); |
|
return false; |
|
} |
|
|
|
break; |
|
} |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
case ETH_P_IPV6: |
|
{ |
|
struct ipv6hdr *pip6; |
|
|
|
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) |
|
return false; |
|
pip6 = ipv6_hdr(skb); |
|
n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); |
|
if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) { |
|
union vxlan_addr ipa = { |
|
.sin6.sin6_addr = pip6->daddr, |
|
.sin6.sin6_family = AF_INET6, |
|
}; |
|
|
|
vxlan_ip_miss(dev, &ipa); |
|
return false; |
|
} |
|
|
|
break; |
|
} |
|
#endif |
|
default: |
|
return false; |
|
} |
|
|
|
if (n) { |
|
bool diff; |
|
|
|
diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
|
if (diff) { |
|
memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, |
|
dev->addr_len); |
|
memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); |
|
} |
|
neigh_release(n); |
|
return diff; |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
|
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); |
|
} |
|
|
|
static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags, |
|
__be16 protocol) |
|
{ |
|
struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh; |
|
|
|
gpe->np_applied = 1; |
|
gpe->next_protocol = tun_p_from_eth_p(protocol); |
|
if (!gpe->next_protocol) |
|
return -EPFNOSUPPORT; |
|
return 0; |
|
} |
|
|
|
static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst, |
|
int iphdr_len, __be32 vni, |
|
struct vxlan_metadata *md, u32 vxflags, |
|
bool udp_sum) |
|
{ |
|
struct vxlanhdr *vxh; |
|
int min_headroom; |
|
int err; |
|
int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
|
__be16 inner_protocol = htons(ETH_P_TEB); |
|
|
|
if ((vxflags & VXLAN_F_REMCSUM_TX) && |
|
skb->ip_summed == CHECKSUM_PARTIAL) { |
|
int csum_start = skb_checksum_start_offset(skb); |
|
|
|
if (csum_start <= VXLAN_MAX_REMCSUM_START && |
|
!(csum_start & VXLAN_RCO_SHIFT_MASK) && |
|
(skb->csum_offset == offsetof(struct udphdr, check) || |
|
skb->csum_offset == offsetof(struct tcphdr, check))) |
|
type |= SKB_GSO_TUNNEL_REMCSUM; |
|
} |
|
|
|
min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
|
+ VXLAN_HLEN + iphdr_len; |
|
|
|
/* Need space for new headers (invalidates iph ptr) */ |
|
err = skb_cow_head(skb, min_headroom); |
|
if (unlikely(err)) |
|
return err; |
|
|
|
err = iptunnel_handle_offloads(skb, type); |
|
if (err) |
|
return err; |
|
|
|
vxh = __skb_push(skb, sizeof(*vxh)); |
|
vxh->vx_flags = VXLAN_HF_VNI; |
|
vxh->vx_vni = vxlan_vni_field(vni); |
|
|
|
if (type & SKB_GSO_TUNNEL_REMCSUM) { |
|
unsigned int start; |
|
|
|
start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr); |
|
vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset); |
|
vxh->vx_flags |= VXLAN_HF_RCO; |
|
|
|
if (!skb_is_gso(skb)) { |
|
skb->ip_summed = CHECKSUM_NONE; |
|
skb->encapsulation = 0; |
|
} |
|
} |
|
|
|
if (vxflags & VXLAN_F_GBP) |
|
vxlan_build_gbp_hdr(vxh, vxflags, md); |
|
if (vxflags & VXLAN_F_GPE) { |
|
err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol); |
|
if (err < 0) |
|
return err; |
|
inner_protocol = skb->protocol; |
|
} |
|
|
|
skb_set_inner_protocol(skb, inner_protocol); |
|
return 0; |
|
} |
|
|
|
static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev, |
|
struct vxlan_sock *sock4, |
|
struct sk_buff *skb, int oif, u8 tos, |
|
__be32 daddr, __be32 *saddr, __be16 dport, __be16 sport, |
|
struct dst_cache *dst_cache, |
|
const struct ip_tunnel_info *info) |
|
{ |
|
bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
|
struct rtable *rt = NULL; |
|
struct flowi4 fl4; |
|
|
|
if (!sock4) |
|
return ERR_PTR(-EIO); |
|
|
|
if (tos && !info) |
|
use_cache = false; |
|
if (use_cache) { |
|
rt = dst_cache_get_ip4(dst_cache, saddr); |
|
if (rt) |
|
return rt; |
|
} |
|
|
|
memset(&fl4, 0, sizeof(fl4)); |
|
fl4.flowi4_oif = oif; |
|
fl4.flowi4_tos = RT_TOS(tos); |
|
fl4.flowi4_mark = skb->mark; |
|
fl4.flowi4_proto = IPPROTO_UDP; |
|
fl4.daddr = daddr; |
|
fl4.saddr = *saddr; |
|
fl4.fl4_dport = dport; |
|
fl4.fl4_sport = sport; |
|
|
|
rt = ip_route_output_key(vxlan->net, &fl4); |
|
if (!IS_ERR(rt)) { |
|
if (rt->dst.dev == dev) { |
|
netdev_dbg(dev, "circular route to %pI4\n", &daddr); |
|
ip_rt_put(rt); |
|
return ERR_PTR(-ELOOP); |
|
} |
|
|
|
*saddr = fl4.saddr; |
|
if (use_cache) |
|
dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); |
|
} else { |
|
netdev_dbg(dev, "no route to %pI4\n", &daddr); |
|
return ERR_PTR(-ENETUNREACH); |
|
} |
|
return rt; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, |
|
struct net_device *dev, |
|
struct vxlan_sock *sock6, |
|
struct sk_buff *skb, int oif, u8 tos, |
|
__be32 label, |
|
const struct in6_addr *daddr, |
|
struct in6_addr *saddr, |
|
__be16 dport, __be16 sport, |
|
struct dst_cache *dst_cache, |
|
const struct ip_tunnel_info *info) |
|
{ |
|
bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
|
struct dst_entry *ndst; |
|
struct flowi6 fl6; |
|
|
|
if (!sock6) |
|
return ERR_PTR(-EIO); |
|
|
|
if (tos && !info) |
|
use_cache = false; |
|
if (use_cache) { |
|
ndst = dst_cache_get_ip6(dst_cache, saddr); |
|
if (ndst) |
|
return ndst; |
|
} |
|
|
|
memset(&fl6, 0, sizeof(fl6)); |
|
fl6.flowi6_oif = oif; |
|
fl6.daddr = *daddr; |
|
fl6.saddr = *saddr; |
|
fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label); |
|
fl6.flowi6_mark = skb->mark; |
|
fl6.flowi6_proto = IPPROTO_UDP; |
|
fl6.fl6_dport = dport; |
|
fl6.fl6_sport = sport; |
|
|
|
ndst = ipv6_stub->ipv6_dst_lookup_flow(vxlan->net, sock6->sock->sk, |
|
&fl6, NULL); |
|
if (IS_ERR(ndst)) { |
|
netdev_dbg(dev, "no route to %pI6\n", daddr); |
|
return ERR_PTR(-ENETUNREACH); |
|
} |
|
|
|
if (unlikely(ndst->dev == dev)) { |
|
netdev_dbg(dev, "circular route to %pI6\n", daddr); |
|
dst_release(ndst); |
|
return ERR_PTR(-ELOOP); |
|
} |
|
|
|
*saddr = fl6.saddr; |
|
if (use_cache) |
|
dst_cache_set_ip6(dst_cache, ndst, saddr); |
|
return ndst; |
|
} |
|
#endif |
|
|
|
/* Bypass encapsulation if the destination is local */ |
|
static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, |
|
struct vxlan_dev *dst_vxlan, __be32 vni, |
|
bool snoop) |
|
{ |
|
struct pcpu_sw_netstats *tx_stats, *rx_stats; |
|
union vxlan_addr loopback; |
|
union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; |
|
struct net_device *dev; |
|
int len = skb->len; |
|
|
|
tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
|
rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); |
|
skb->pkt_type = PACKET_HOST; |
|
skb->encapsulation = 0; |
|
skb->dev = dst_vxlan->dev; |
|
__skb_pull(skb, skb_network_offset(skb)); |
|
|
|
if (remote_ip->sa.sa_family == AF_INET) { |
|
loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
|
loopback.sa.sa_family = AF_INET; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
loopback.sin6.sin6_addr = in6addr_loopback; |
|
loopback.sa.sa_family = AF_INET6; |
|
#endif |
|
} |
|
|
|
rcu_read_lock(); |
|
dev = skb->dev; |
|
if (unlikely(!(dev->flags & IFF_UP))) { |
|
kfree_skb(skb); |
|
goto drop; |
|
} |
|
|
|
if ((dst_vxlan->cfg.flags & VXLAN_F_LEARN) && snoop) |
|
vxlan_snoop(dev, &loopback, eth_hdr(skb)->h_source, 0, vni); |
|
|
|
u64_stats_update_begin(&tx_stats->syncp); |
|
tx_stats->tx_packets++; |
|
tx_stats->tx_bytes += len; |
|
u64_stats_update_end(&tx_stats->syncp); |
|
|
|
if (netif_rx(skb) == NET_RX_SUCCESS) { |
|
u64_stats_update_begin(&rx_stats->syncp); |
|
rx_stats->rx_packets++; |
|
rx_stats->rx_bytes += len; |
|
u64_stats_update_end(&rx_stats->syncp); |
|
} else { |
|
drop: |
|
dev->stats.rx_dropped++; |
|
} |
|
rcu_read_unlock(); |
|
} |
|
|
|
static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev, |
|
struct vxlan_dev *vxlan, |
|
union vxlan_addr *daddr, |
|
__be16 dst_port, int dst_ifindex, __be32 vni, |
|
struct dst_entry *dst, |
|
u32 rt_flags) |
|
{ |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
/* IPv6 rt-flags are checked against RTF_LOCAL, but the value of |
|
* RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple |
|
* we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry. |
|
*/ |
|
BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL); |
|
#endif |
|
/* Bypass encapsulation if the destination is local */ |
|
if (rt_flags & RTCF_LOCAL && |
|
!(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { |
|
struct vxlan_dev *dst_vxlan; |
|
|
|
dst_release(dst); |
|
dst_vxlan = vxlan_find_vni(vxlan->net, dst_ifindex, vni, |
|
daddr->sa.sa_family, dst_port, |
|
vxlan->cfg.flags); |
|
if (!dst_vxlan) { |
|
dev->stats.tx_errors++; |
|
kfree_skb(skb); |
|
|
|
return -ENOENT; |
|
} |
|
vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni, true); |
|
return 1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
|
__be32 default_vni, struct vxlan_rdst *rdst, |
|
bool did_rsc) |
|
{ |
|
struct dst_cache *dst_cache; |
|
struct ip_tunnel_info *info; |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
const struct iphdr *old_iph = ip_hdr(skb); |
|
union vxlan_addr *dst; |
|
union vxlan_addr remote_ip, local_ip; |
|
struct vxlan_metadata _md; |
|
struct vxlan_metadata *md = &_md; |
|
__be16 src_port = 0, dst_port; |
|
struct dst_entry *ndst = NULL; |
|
__be32 vni, label; |
|
__u8 tos, ttl; |
|
int ifindex; |
|
int err; |
|
u32 flags = vxlan->cfg.flags; |
|
bool udp_sum = false; |
|
bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev)); |
|
|
|
info = skb_tunnel_info(skb); |
|
|
|
if (rdst) { |
|
dst = &rdst->remote_ip; |
|
if (vxlan_addr_any(dst)) { |
|
if (did_rsc) { |
|
/* short-circuited back to local bridge */ |
|
vxlan_encap_bypass(skb, vxlan, vxlan, |
|
default_vni, true); |
|
return; |
|
} |
|
goto drop; |
|
} |
|
|
|
dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
|
vni = (rdst->remote_vni) ? : default_vni; |
|
ifindex = rdst->remote_ifindex; |
|
local_ip = vxlan->cfg.saddr; |
|
dst_cache = &rdst->dst_cache; |
|
md->gbp = skb->mark; |
|
if (flags & VXLAN_F_TTL_INHERIT) { |
|
ttl = ip_tunnel_get_ttl(old_iph, skb); |
|
} else { |
|
ttl = vxlan->cfg.ttl; |
|
if (!ttl && vxlan_addr_multicast(dst)) |
|
ttl = 1; |
|
} |
|
|
|
tos = vxlan->cfg.tos; |
|
if (tos == 1) |
|
tos = ip_tunnel_get_dsfield(old_iph, skb); |
|
|
|
if (dst->sa.sa_family == AF_INET) |
|
udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX); |
|
else |
|
udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); |
|
label = vxlan->cfg.label; |
|
} else { |
|
if (!info) { |
|
WARN_ONCE(1, "%s: Missing encapsulation instructions\n", |
|
dev->name); |
|
goto drop; |
|
} |
|
remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
|
if (remote_ip.sa.sa_family == AF_INET) { |
|
remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
|
local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src; |
|
} else { |
|
remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; |
|
local_ip.sin6.sin6_addr = info->key.u.ipv6.src; |
|
} |
|
dst = &remote_ip; |
|
dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
|
vni = tunnel_id_to_key32(info->key.tun_id); |
|
ifindex = 0; |
|
dst_cache = &info->dst_cache; |
|
if (info->key.tun_flags & TUNNEL_VXLAN_OPT) { |
|
if (info->options_len < sizeof(*md)) |
|
goto drop; |
|
md = ip_tunnel_info_opts(info); |
|
} |
|
ttl = info->key.ttl; |
|
tos = info->key.tos; |
|
label = info->key.label; |
|
udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
|
} |
|
src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
|
vxlan->cfg.port_max, true); |
|
|
|
rcu_read_lock(); |
|
if (dst->sa.sa_family == AF_INET) { |
|
struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
|
struct rtable *rt; |
|
__be16 df = 0; |
|
|
|
if (!ifindex) |
|
ifindex = sock4->sock->sk->sk_bound_dev_if; |
|
|
|
rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos, |
|
dst->sin.sin_addr.s_addr, |
|
&local_ip.sin.sin_addr.s_addr, |
|
dst_port, src_port, |
|
dst_cache, info); |
|
if (IS_ERR(rt)) { |
|
err = PTR_ERR(rt); |
|
goto tx_error; |
|
} |
|
|
|
if (!info) { |
|
/* Bypass encapsulation if the destination is local */ |
|
err = encap_bypass_if_local(skb, dev, vxlan, dst, |
|
dst_port, ifindex, vni, |
|
&rt->dst, rt->rt_flags); |
|
if (err) |
|
goto out_unlock; |
|
|
|
if (vxlan->cfg.df == VXLAN_DF_SET) { |
|
df = htons(IP_DF); |
|
} else if (vxlan->cfg.df == VXLAN_DF_INHERIT) { |
|
struct ethhdr *eth = eth_hdr(skb); |
|
|
|
if (ntohs(eth->h_proto) == ETH_P_IPV6 || |
|
(ntohs(eth->h_proto) == ETH_P_IP && |
|
old_iph->frag_off & htons(IP_DF))) |
|
df = htons(IP_DF); |
|
} |
|
} else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) { |
|
df = htons(IP_DF); |
|
} |
|
|
|
ndst = &rt->dst; |
|
err = skb_tunnel_check_pmtu(skb, ndst, VXLAN_HEADROOM, |
|
netif_is_any_bridge_port(dev)); |
|
if (err < 0) { |
|
goto tx_error; |
|
} else if (err) { |
|
if (info) { |
|
struct ip_tunnel_info *unclone; |
|
struct in_addr src, dst; |
|
|
|
unclone = skb_tunnel_info_unclone(skb); |
|
if (unlikely(!unclone)) |
|
goto tx_error; |
|
|
|
src = remote_ip.sin.sin_addr; |
|
dst = local_ip.sin.sin_addr; |
|
unclone->key.u.ipv4.src = src.s_addr; |
|
unclone->key.u.ipv4.dst = dst.s_addr; |
|
} |
|
vxlan_encap_bypass(skb, vxlan, vxlan, vni, false); |
|
dst_release(ndst); |
|
goto out_unlock; |
|
} |
|
|
|
tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
|
ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
|
err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr), |
|
vni, md, flags, udp_sum); |
|
if (err < 0) |
|
goto tx_error; |
|
|
|
udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr, |
|
dst->sin.sin_addr.s_addr, tos, ttl, df, |
|
src_port, dst_port, xnet, !udp_sum); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
|
|
|
if (!ifindex) |
|
ifindex = sock6->sock->sk->sk_bound_dev_if; |
|
|
|
ndst = vxlan6_get_route(vxlan, dev, sock6, skb, ifindex, tos, |
|
label, &dst->sin6.sin6_addr, |
|
&local_ip.sin6.sin6_addr, |
|
dst_port, src_port, |
|
dst_cache, info); |
|
if (IS_ERR(ndst)) { |
|
err = PTR_ERR(ndst); |
|
ndst = NULL; |
|
goto tx_error; |
|
} |
|
|
|
if (!info) { |
|
u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; |
|
|
|
err = encap_bypass_if_local(skb, dev, vxlan, dst, |
|
dst_port, ifindex, vni, |
|
ndst, rt6i_flags); |
|
if (err) |
|
goto out_unlock; |
|
} |
|
|
|
err = skb_tunnel_check_pmtu(skb, ndst, VXLAN6_HEADROOM, |
|
netif_is_any_bridge_port(dev)); |
|
if (err < 0) { |
|
goto tx_error; |
|
} else if (err) { |
|
if (info) { |
|
struct ip_tunnel_info *unclone; |
|
struct in6_addr src, dst; |
|
|
|
unclone = skb_tunnel_info_unclone(skb); |
|
if (unlikely(!unclone)) |
|
goto tx_error; |
|
|
|
src = remote_ip.sin6.sin6_addr; |
|
dst = local_ip.sin6.sin6_addr; |
|
unclone->key.u.ipv6.src = src; |
|
unclone->key.u.ipv6.dst = dst; |
|
} |
|
|
|
vxlan_encap_bypass(skb, vxlan, vxlan, vni, false); |
|
dst_release(ndst); |
|
goto out_unlock; |
|
} |
|
|
|
tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
|
ttl = ttl ? : ip6_dst_hoplimit(ndst); |
|
skb_scrub_packet(skb, xnet); |
|
err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr), |
|
vni, md, flags, udp_sum); |
|
if (err < 0) |
|
goto tx_error; |
|
|
|
udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev, |
|
&local_ip.sin6.sin6_addr, |
|
&dst->sin6.sin6_addr, tos, ttl, |
|
label, src_port, dst_port, !udp_sum); |
|
#endif |
|
} |
|
out_unlock: |
|
rcu_read_unlock(); |
|
return; |
|
|
|
drop: |
|
dev->stats.tx_dropped++; |
|
dev_kfree_skb(skb); |
|
return; |
|
|
|
tx_error: |
|
rcu_read_unlock(); |
|
if (err == -ELOOP) |
|
dev->stats.collisions++; |
|
else if (err == -ENETUNREACH) |
|
dev->stats.tx_carrier_errors++; |
|
dst_release(ndst); |
|
dev->stats.tx_errors++; |
|
kfree_skb(skb); |
|
} |
|
|
|
static void vxlan_xmit_nh(struct sk_buff *skb, struct net_device *dev, |
|
struct vxlan_fdb *f, __be32 vni, bool did_rsc) |
|
{ |
|
struct vxlan_rdst nh_rdst; |
|
struct nexthop *nh; |
|
bool do_xmit; |
|
u32 hash; |
|
|
|
memset(&nh_rdst, 0, sizeof(struct vxlan_rdst)); |
|
hash = skb_get_hash(skb); |
|
|
|
rcu_read_lock(); |
|
nh = rcu_dereference(f->nh); |
|
if (!nh) { |
|
rcu_read_unlock(); |
|
goto drop; |
|
} |
|
do_xmit = vxlan_fdb_nh_path_select(nh, hash, &nh_rdst); |
|
rcu_read_unlock(); |
|
|
|
if (likely(do_xmit)) |
|
vxlan_xmit_one(skb, dev, vni, &nh_rdst, did_rsc); |
|
else |
|
goto drop; |
|
|
|
return; |
|
|
|
drop: |
|
dev->stats.tx_dropped++; |
|
dev_kfree_skb(skb); |
|
} |
|
|
|
/* Transmit local packets over Vxlan |
|
* |
|
* Outer IP header inherits ECN and DF from inner header. |
|
* Outer UDP destination is the VXLAN assigned port. |
|
* source port is based on hash of flow |
|
*/ |
|
static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_rdst *rdst, *fdst = NULL; |
|
const struct ip_tunnel_info *info; |
|
bool did_rsc = false; |
|
struct vxlan_fdb *f; |
|
struct ethhdr *eth; |
|
__be32 vni = 0; |
|
|
|
info = skb_tunnel_info(skb); |
|
|
|
skb_reset_mac_header(skb); |
|
|
|
if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) { |
|
if (info && info->mode & IP_TUNNEL_INFO_BRIDGE && |
|
info->mode & IP_TUNNEL_INFO_TX) { |
|
vni = tunnel_id_to_key32(info->key.tun_id); |
|
} else { |
|
if (info && info->mode & IP_TUNNEL_INFO_TX) |
|
vxlan_xmit_one(skb, dev, vni, NULL, false); |
|
else |
|
kfree_skb(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
} |
|
|
|
if (vxlan->cfg.flags & VXLAN_F_PROXY) { |
|
eth = eth_hdr(skb); |
|
if (ntohs(eth->h_proto) == ETH_P_ARP) |
|
return arp_reduce(dev, skb, vni); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
else if (ntohs(eth->h_proto) == ETH_P_IPV6 && |
|
pskb_may_pull(skb, sizeof(struct ipv6hdr) + |
|
sizeof(struct nd_msg)) && |
|
ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { |
|
struct nd_msg *m = (struct nd_msg *)(ipv6_hdr(skb) + 1); |
|
|
|
if (m->icmph.icmp6_code == 0 && |
|
m->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) |
|
return neigh_reduce(dev, skb, vni); |
|
} |
|
#endif |
|
} |
|
|
|
eth = eth_hdr(skb); |
|
f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
|
did_rsc = false; |
|
|
|
if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) && |
|
(ntohs(eth->h_proto) == ETH_P_IP || |
|
ntohs(eth->h_proto) == ETH_P_IPV6)) { |
|
did_rsc = route_shortcircuit(dev, skb); |
|
if (did_rsc) |
|
f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
|
} |
|
|
|
if (f == NULL) { |
|
f = vxlan_find_mac(vxlan, all_zeros_mac, vni); |
|
if (f == NULL) { |
|
if ((vxlan->cfg.flags & VXLAN_F_L2MISS) && |
|
!is_multicast_ether_addr(eth->h_dest)) |
|
vxlan_fdb_miss(vxlan, eth->h_dest); |
|
|
|
dev->stats.tx_dropped++; |
|
kfree_skb(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
} |
|
|
|
if (rcu_access_pointer(f->nh)) { |
|
vxlan_xmit_nh(skb, dev, f, |
|
(vni ? : vxlan->default_dst.remote_vni), did_rsc); |
|
} else { |
|
list_for_each_entry_rcu(rdst, &f->remotes, list) { |
|
struct sk_buff *skb1; |
|
|
|
if (!fdst) { |
|
fdst = rdst; |
|
continue; |
|
} |
|
skb1 = skb_clone(skb, GFP_ATOMIC); |
|
if (skb1) |
|
vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc); |
|
} |
|
if (fdst) |
|
vxlan_xmit_one(skb, dev, vni, fdst, did_rsc); |
|
else |
|
kfree_skb(skb); |
|
} |
|
|
|
return NETDEV_TX_OK; |
|
} |
|
|
|
/* Walk the forwarding table and purge stale entries */ |
|
static void vxlan_cleanup(struct timer_list *t) |
|
{ |
|
struct vxlan_dev *vxlan = from_timer(vxlan, t, age_timer); |
|
unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; |
|
unsigned int h; |
|
|
|
if (!netif_running(vxlan->dev)) |
|
return; |
|
|
|
for (h = 0; h < FDB_HASH_SIZE; ++h) { |
|
struct hlist_node *p, *n; |
|
|
|
spin_lock(&vxlan->hash_lock[h]); |
|
hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
|
struct vxlan_fdb *f |
|
= container_of(p, struct vxlan_fdb, hlist); |
|
unsigned long timeout; |
|
|
|
if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
|
continue; |
|
|
|
if (f->flags & NTF_EXT_LEARNED) |
|
continue; |
|
|
|
timeout = f->used + vxlan->cfg.age_interval * HZ; |
|
if (time_before_eq(timeout, jiffies)) { |
|
netdev_dbg(vxlan->dev, |
|
"garbage collect %pM\n", |
|
f->eth_addr); |
|
f->state = NUD_STALE; |
|
vxlan_fdb_destroy(vxlan, f, true, true); |
|
} else if (time_before(timeout, next_timer)) |
|
next_timer = timeout; |
|
} |
|
spin_unlock(&vxlan->hash_lock[h]); |
|
} |
|
|
|
mod_timer(&vxlan->age_timer, next_timer); |
|
} |
|
|
|
static void vxlan_vs_del_dev(struct vxlan_dev *vxlan) |
|
{ |
|
struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
|
|
|
spin_lock(&vn->sock_lock); |
|
hlist_del_init_rcu(&vxlan->hlist4.hlist); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
hlist_del_init_rcu(&vxlan->hlist6.hlist); |
|
#endif |
|
spin_unlock(&vn->sock_lock); |
|
} |
|
|
|
static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan, |
|
struct vxlan_dev_node *node) |
|
{ |
|
struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
|
__be32 vni = vxlan->default_dst.remote_vni; |
|
|
|
node->vxlan = vxlan; |
|
spin_lock(&vn->sock_lock); |
|
hlist_add_head_rcu(&node->hlist, vni_head(vs, vni)); |
|
spin_unlock(&vn->sock_lock); |
|
} |
|
|
|
/* Setup stats when device is created */ |
|
static int vxlan_init(struct net_device *dev) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
int err; |
|
|
|
dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
|
if (!dev->tstats) |
|
return -ENOMEM; |
|
|
|
err = gro_cells_init(&vxlan->gro_cells, dev); |
|
if (err) { |
|
free_percpu(dev->tstats); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni) |
|
{ |
|
struct vxlan_fdb *f; |
|
u32 hash_index = fdb_head_index(vxlan, all_zeros_mac, vni); |
|
|
|
spin_lock_bh(&vxlan->hash_lock[hash_index]); |
|
f = __vxlan_find_mac(vxlan, all_zeros_mac, vni); |
|
if (f) |
|
vxlan_fdb_destroy(vxlan, f, true, true); |
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
} |
|
|
|
static void vxlan_uninit(struct net_device *dev) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
|
|
gro_cells_destroy(&vxlan->gro_cells); |
|
|
|
vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni); |
|
|
|
free_percpu(dev->tstats); |
|
} |
|
|
|
/* Start ageing timer and join group when device is brought up */ |
|
static int vxlan_open(struct net_device *dev) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
int ret; |
|
|
|
ret = vxlan_sock_add(vxlan); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
|
ret = vxlan_igmp_join(vxlan); |
|
if (ret == -EADDRINUSE) |
|
ret = 0; |
|
if (ret) { |
|
vxlan_sock_release(vxlan); |
|
return ret; |
|
} |
|
} |
|
|
|
if (vxlan->cfg.age_interval) |
|
mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
|
|
|
return ret; |
|
} |
|
|
|
/* Purge the forwarding table */ |
|
static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all) |
|
{ |
|
unsigned int h; |
|
|
|
for (h = 0; h < FDB_HASH_SIZE; ++h) { |
|
struct hlist_node *p, *n; |
|
|
|
spin_lock_bh(&vxlan->hash_lock[h]); |
|
hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
|
struct vxlan_fdb *f |
|
= container_of(p, struct vxlan_fdb, hlist); |
|
if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP))) |
|
continue; |
|
/* the all_zeros_mac entry is deleted at vxlan_uninit */ |
|
if (is_zero_ether_addr(f->eth_addr) && |
|
f->vni == vxlan->cfg.vni) |
|
continue; |
|
vxlan_fdb_destroy(vxlan, f, true, true); |
|
} |
|
spin_unlock_bh(&vxlan->hash_lock[h]); |
|
} |
|
} |
|
|
|
/* Cleanup timer and forwarding table on shutdown */ |
|
static int vxlan_stop(struct net_device *dev) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
|
int ret = 0; |
|
|
|
if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
|
!vxlan_group_used(vn, vxlan)) |
|
ret = vxlan_igmp_leave(vxlan); |
|
|
|
del_timer_sync(&vxlan->age_timer); |
|
|
|
vxlan_flush(vxlan, false); |
|
vxlan_sock_release(vxlan); |
|
|
|
return ret; |
|
} |
|
|
|
/* Stub, nothing needs to be done. */ |
|
static void vxlan_set_multicast_list(struct net_device *dev) |
|
{ |
|
} |
|
|
|
static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_rdst *dst = &vxlan->default_dst; |
|
struct net_device *lowerdev = __dev_get_by_index(vxlan->net, |
|
dst->remote_ifindex); |
|
bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6); |
|
|
|
/* This check is different than dev->max_mtu, because it looks at |
|
* the lowerdev->mtu, rather than the static dev->max_mtu |
|
*/ |
|
if (lowerdev) { |
|
int max_mtu = lowerdev->mtu - |
|
(use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
|
if (new_mtu > max_mtu) |
|
return -EINVAL; |
|
} |
|
|
|
dev->mtu = new_mtu; |
|
return 0; |
|
} |
|
|
|
static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct ip_tunnel_info *info = skb_tunnel_info(skb); |
|
__be16 sport, dport; |
|
|
|
sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
|
vxlan->cfg.port_max, true); |
|
dport = info->key.tp_dst ? : vxlan->cfg.dst_port; |
|
|
|
if (ip_tunnel_info_af(info) == AF_INET) { |
|
struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
|
struct rtable *rt; |
|
|
|
rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos, |
|
info->key.u.ipv4.dst, |
|
&info->key.u.ipv4.src, dport, sport, |
|
&info->dst_cache, info); |
|
if (IS_ERR(rt)) |
|
return PTR_ERR(rt); |
|
ip_rt_put(rt); |
|
} else { |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
|
struct dst_entry *ndst; |
|
|
|
ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos, |
|
info->key.label, &info->key.u.ipv6.dst, |
|
&info->key.u.ipv6.src, dport, sport, |
|
&info->dst_cache, info); |
|
if (IS_ERR(ndst)) |
|
return PTR_ERR(ndst); |
|
dst_release(ndst); |
|
#else /* !CONFIG_IPV6 */ |
|
return -EPFNOSUPPORT; |
|
#endif |
|
} |
|
info->key.tp_src = sport; |
|
info->key.tp_dst = dport; |
|
return 0; |
|
} |
|
|
|
static const struct net_device_ops vxlan_netdev_ether_ops = { |
|
.ndo_init = vxlan_init, |
|
.ndo_uninit = vxlan_uninit, |
|
.ndo_open = vxlan_open, |
|
.ndo_stop = vxlan_stop, |
|
.ndo_start_xmit = vxlan_xmit, |
|
.ndo_get_stats64 = dev_get_tstats64, |
|
.ndo_set_rx_mode = vxlan_set_multicast_list, |
|
.ndo_change_mtu = vxlan_change_mtu, |
|
.ndo_validate_addr = eth_validate_addr, |
|
.ndo_set_mac_address = eth_mac_addr, |
|
.ndo_fdb_add = vxlan_fdb_add, |
|
.ndo_fdb_del = vxlan_fdb_delete, |
|
.ndo_fdb_dump = vxlan_fdb_dump, |
|
.ndo_fdb_get = vxlan_fdb_get, |
|
.ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
|
.ndo_change_proto_down = dev_change_proto_down_generic, |
|
}; |
|
|
|
static const struct net_device_ops vxlan_netdev_raw_ops = { |
|
.ndo_init = vxlan_init, |
|
.ndo_uninit = vxlan_uninit, |
|
.ndo_open = vxlan_open, |
|
.ndo_stop = vxlan_stop, |
|
.ndo_start_xmit = vxlan_xmit, |
|
.ndo_get_stats64 = dev_get_tstats64, |
|
.ndo_change_mtu = vxlan_change_mtu, |
|
.ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
|
}; |
|
|
|
/* Info for udev, that this is a virtual tunnel endpoint */ |
|
static struct device_type vxlan_type = { |
|
.name = "vxlan", |
|
}; |
|
|
|
/* Calls the ndo_udp_tunnel_add of the caller in order to |
|
* supply the listening VXLAN udp ports. Callers are expected |
|
* to implement the ndo_udp_tunnel_add. |
|
*/ |
|
static void vxlan_offload_rx_ports(struct net_device *dev, bool push) |
|
{ |
|
struct vxlan_sock *vs; |
|
struct net *net = dev_net(dev); |
|
struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
|
unsigned int i; |
|
|
|
spin_lock(&vn->sock_lock); |
|
for (i = 0; i < PORT_HASH_SIZE; ++i) { |
|
hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
|
unsigned short type; |
|
|
|
if (vs->flags & VXLAN_F_GPE) |
|
type = UDP_TUNNEL_TYPE_VXLAN_GPE; |
|
else |
|
type = UDP_TUNNEL_TYPE_VXLAN; |
|
|
|
if (push) |
|
udp_tunnel_push_rx_port(dev, vs->sock, type); |
|
else |
|
udp_tunnel_drop_rx_port(dev, vs->sock, type); |
|
} |
|
} |
|
spin_unlock(&vn->sock_lock); |
|
} |
|
|
|
/* Initialize the device structure. */ |
|
static void vxlan_setup(struct net_device *dev) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
unsigned int h; |
|
|
|
eth_hw_addr_random(dev); |
|
ether_setup(dev); |
|
|
|
dev->needs_free_netdev = true; |
|
SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
|
|
|
dev->features |= NETIF_F_LLTX; |
|
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST; |
|
dev->features |= NETIF_F_RXCSUM; |
|
dev->features |= NETIF_F_GSO_SOFTWARE; |
|
|
|
dev->vlan_features = dev->features; |
|
dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST; |
|
dev->hw_features |= NETIF_F_RXCSUM; |
|
dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
|
netif_keep_dst(dev); |
|
dev->priv_flags |= IFF_NO_QUEUE; |
|
|
|
/* MTU range: 68 - 65535 */ |
|
dev->min_mtu = ETH_MIN_MTU; |
|
dev->max_mtu = ETH_MAX_MTU; |
|
|
|
INIT_LIST_HEAD(&vxlan->next); |
|
|
|
timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE); |
|
|
|
vxlan->dev = dev; |
|
|
|
for (h = 0; h < FDB_HASH_SIZE; ++h) { |
|
spin_lock_init(&vxlan->hash_lock[h]); |
|
INIT_HLIST_HEAD(&vxlan->fdb_head[h]); |
|
} |
|
} |
|
|
|
static void vxlan_ether_setup(struct net_device *dev) |
|
{ |
|
dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
|
dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
|
dev->netdev_ops = &vxlan_netdev_ether_ops; |
|
} |
|
|
|
static void vxlan_raw_setup(struct net_device *dev) |
|
{ |
|
dev->header_ops = NULL; |
|
dev->type = ARPHRD_NONE; |
|
dev->hard_header_len = 0; |
|
dev->addr_len = 0; |
|
dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; |
|
dev->netdev_ops = &vxlan_netdev_raw_ops; |
|
} |
|
|
|
static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { |
|
[IFLA_VXLAN_ID] = { .type = NLA_U32 }, |
|
[IFLA_VXLAN_GROUP] = { .len = sizeof_field(struct iphdr, daddr) }, |
|
[IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
|
[IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
|
[IFLA_VXLAN_LOCAL] = { .len = sizeof_field(struct iphdr, saddr) }, |
|
[IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
|
[IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_TTL] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_LABEL] = { .type = NLA_U32 }, |
|
[IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, |
|
[IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, |
|
[IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
|
[IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_RSC] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
|
[IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, |
|
[IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
|
[IFLA_VXLAN_GPE] = { .type = NLA_FLAG, }, |
|
[IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
|
[IFLA_VXLAN_TTL_INHERIT] = { .type = NLA_FLAG }, |
|
[IFLA_VXLAN_DF] = { .type = NLA_U8 }, |
|
}; |
|
|
|
static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
if (tb[IFLA_ADDRESS]) { |
|
if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], |
|
"Provided link layer address is not Ethernet"); |
|
return -EINVAL; |
|
} |
|
|
|
if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], |
|
"Provided Ethernet address is not unicast"); |
|
return -EADDRNOTAVAIL; |
|
} |
|
} |
|
|
|
if (tb[IFLA_MTU]) { |
|
u32 mtu = nla_get_u32(tb[IFLA_MTU]); |
|
|
|
if (mtu < ETH_MIN_MTU || mtu > ETH_MAX_MTU) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU], |
|
"MTU must be between 68 and 65535"); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
if (!data) { |
|
NL_SET_ERR_MSG(extack, |
|
"Required attributes not provided to perform the operation"); |
|
return -EINVAL; |
|
} |
|
|
|
if (data[IFLA_VXLAN_ID]) { |
|
u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); |
|
|
|
if (id >= VXLAN_N_VID) { |
|
NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_ID], |
|
"VXLAN ID must be lower than 16777216"); |
|
return -ERANGE; |
|
} |
|
} |
|
|
|
if (data[IFLA_VXLAN_PORT_RANGE]) { |
|
const struct ifla_vxlan_port_range *p |
|
= nla_data(data[IFLA_VXLAN_PORT_RANGE]); |
|
|
|
if (ntohs(p->high) < ntohs(p->low)) { |
|
NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_PORT_RANGE], |
|
"Invalid source port range"); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
if (data[IFLA_VXLAN_DF]) { |
|
enum ifla_vxlan_df df = nla_get_u8(data[IFLA_VXLAN_DF]); |
|
|
|
if (df < 0 || df > VXLAN_DF_MAX) { |
|
NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_DF], |
|
"Invalid DF attribute"); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void vxlan_get_drvinfo(struct net_device *netdev, |
|
struct ethtool_drvinfo *drvinfo) |
|
{ |
|
strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); |
|
strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); |
|
} |
|
|
|
static int vxlan_get_link_ksettings(struct net_device *dev, |
|
struct ethtool_link_ksettings *cmd) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_rdst *dst = &vxlan->default_dst; |
|
struct net_device *lowerdev = __dev_get_by_index(vxlan->net, |
|
dst->remote_ifindex); |
|
|
|
if (!lowerdev) { |
|
cmd->base.duplex = DUPLEX_UNKNOWN; |
|
cmd->base.port = PORT_OTHER; |
|
cmd->base.speed = SPEED_UNKNOWN; |
|
|
|
return 0; |
|
} |
|
|
|
return __ethtool_get_link_ksettings(lowerdev, cmd); |
|
} |
|
|
|
static const struct ethtool_ops vxlan_ethtool_ops = { |
|
.get_drvinfo = vxlan_get_drvinfo, |
|
.get_link = ethtool_op_get_link, |
|
.get_link_ksettings = vxlan_get_link_ksettings, |
|
}; |
|
|
|
static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
|
__be16 port, u32 flags, int ifindex) |
|
{ |
|
struct socket *sock; |
|
struct udp_port_cfg udp_conf; |
|
int err; |
|
|
|
memset(&udp_conf, 0, sizeof(udp_conf)); |
|
|
|
if (ipv6) { |
|
udp_conf.family = AF_INET6; |
|
udp_conf.use_udp6_rx_checksums = |
|
!(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
|
udp_conf.ipv6_v6only = 1; |
|
} else { |
|
udp_conf.family = AF_INET; |
|
} |
|
|
|
udp_conf.local_udp_port = port; |
|
udp_conf.bind_ifindex = ifindex; |
|
|
|
/* Open UDP socket */ |
|
err = udp_sock_create(net, &udp_conf, &sock); |
|
if (err < 0) |
|
return ERR_PTR(err); |
|
|
|
return sock; |
|
} |
|
|
|
/* Create new listen socket if needed */ |
|
static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
|
__be16 port, u32 flags, |
|
int ifindex) |
|
{ |
|
struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
|
struct vxlan_sock *vs; |
|
struct socket *sock; |
|
unsigned int h; |
|
struct udp_tunnel_sock_cfg tunnel_cfg; |
|
|
|
vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
|
if (!vs) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
for (h = 0; h < VNI_HASH_SIZE; ++h) |
|
INIT_HLIST_HEAD(&vs->vni_list[h]); |
|
|
|
sock = vxlan_create_sock(net, ipv6, port, flags, ifindex); |
|
if (IS_ERR(sock)) { |
|
kfree(vs); |
|
return ERR_CAST(sock); |
|
} |
|
|
|
vs->sock = sock; |
|
refcount_set(&vs->refcnt, 1); |
|
vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
|
|
|
spin_lock(&vn->sock_lock); |
|
hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); |
|
udp_tunnel_notify_add_rx_port(sock, |
|
(vs->flags & VXLAN_F_GPE) ? |
|
UDP_TUNNEL_TYPE_VXLAN_GPE : |
|
UDP_TUNNEL_TYPE_VXLAN); |
|
spin_unlock(&vn->sock_lock); |
|
|
|
/* Mark socket as an encapsulation socket. */ |
|
memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
|
tunnel_cfg.sk_user_data = vs; |
|
tunnel_cfg.encap_type = 1; |
|
tunnel_cfg.encap_rcv = vxlan_rcv; |
|
tunnel_cfg.encap_err_lookup = vxlan_err_lookup; |
|
tunnel_cfg.encap_destroy = NULL; |
|
tunnel_cfg.gro_receive = vxlan_gro_receive; |
|
tunnel_cfg.gro_complete = vxlan_gro_complete; |
|
|
|
setup_udp_tunnel_sock(net, sock, &tunnel_cfg); |
|
|
|
return vs; |
|
} |
|
|
|
static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
|
{ |
|
struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
|
struct vxlan_sock *vs = NULL; |
|
struct vxlan_dev_node *node; |
|
int l3mdev_index = 0; |
|
|
|
if (vxlan->cfg.remote_ifindex) |
|
l3mdev_index = l3mdev_master_upper_ifindex_by_index( |
|
vxlan->net, vxlan->cfg.remote_ifindex); |
|
|
|
if (!vxlan->cfg.no_share) { |
|
spin_lock(&vn->sock_lock); |
|
vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
|
vxlan->cfg.dst_port, vxlan->cfg.flags, |
|
l3mdev_index); |
|
if (vs && !refcount_inc_not_zero(&vs->refcnt)) { |
|
spin_unlock(&vn->sock_lock); |
|
return -EBUSY; |
|
} |
|
spin_unlock(&vn->sock_lock); |
|
} |
|
if (!vs) |
|
vs = vxlan_socket_create(vxlan->net, ipv6, |
|
vxlan->cfg.dst_port, vxlan->cfg.flags, |
|
l3mdev_index); |
|
if (IS_ERR(vs)) |
|
return PTR_ERR(vs); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
if (ipv6) { |
|
rcu_assign_pointer(vxlan->vn6_sock, vs); |
|
node = &vxlan->hlist6; |
|
} else |
|
#endif |
|
{ |
|
rcu_assign_pointer(vxlan->vn4_sock, vs); |
|
node = &vxlan->hlist4; |
|
} |
|
vxlan_vs_add_dev(vs, vxlan, node); |
|
return 0; |
|
} |
|
|
|
static int vxlan_sock_add(struct vxlan_dev *vxlan) |
|
{ |
|
bool metadata = vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA; |
|
bool ipv6 = vxlan->cfg.flags & VXLAN_F_IPV6 || metadata; |
|
bool ipv4 = !ipv6 || metadata; |
|
int ret = 0; |
|
|
|
RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
|
if (ipv6) { |
|
ret = __vxlan_sock_add(vxlan, true); |
|
if (ret < 0 && ret != -EAFNOSUPPORT) |
|
ipv4 = false; |
|
} |
|
#endif |
|
if (ipv4) |
|
ret = __vxlan_sock_add(vxlan, false); |
|
if (ret < 0) |
|
vxlan_sock_release(vxlan); |
|
return ret; |
|
} |
|
|
|
static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf, |
|
struct net_device **lower, |
|
struct vxlan_dev *old, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
|
struct vxlan_dev *tmp; |
|
bool use_ipv6 = false; |
|
|
|
if (conf->flags & VXLAN_F_GPE) { |
|
/* For now, allow GPE only together with |
|
* COLLECT_METADATA. This can be relaxed later; in such |
|
* case, the other side of the PtP link will have to be |
|
* provided. |
|
*/ |
|
if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) || |
|
!(conf->flags & VXLAN_F_COLLECT_METADATA)) { |
|
NL_SET_ERR_MSG(extack, |
|
"VXLAN GPE does not support this combination of attributes"); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
if (!conf->remote_ip.sa.sa_family && !conf->saddr.sa.sa_family) { |
|
/* Unless IPv6 is explicitly requested, assume IPv4 */ |
|
conf->remote_ip.sa.sa_family = AF_INET; |
|
conf->saddr.sa.sa_family = AF_INET; |
|
} else if (!conf->remote_ip.sa.sa_family) { |
|
conf->remote_ip.sa.sa_family = conf->saddr.sa.sa_family; |
|
} else if (!conf->saddr.sa.sa_family) { |
|
conf->saddr.sa.sa_family = conf->remote_ip.sa.sa_family; |
|
} |
|
|
|
if (conf->saddr.sa.sa_family != conf->remote_ip.sa.sa_family) { |
|
NL_SET_ERR_MSG(extack, |
|
"Local and remote address must be from the same family"); |
|
return -EINVAL; |
|
} |
|
|
|
if (vxlan_addr_multicast(&conf->saddr)) { |
|
NL_SET_ERR_MSG(extack, "Local address cannot be multicast"); |
|
return -EINVAL; |
|
} |
|
|
|
if (conf->saddr.sa.sa_family == AF_INET6) { |
|
if (!IS_ENABLED(CONFIG_IPV6)) { |
|
NL_SET_ERR_MSG(extack, |
|
"IPv6 support not enabled in the kernel"); |
|
return -EPFNOSUPPORT; |
|
} |
|
use_ipv6 = true; |
|
conf->flags |= VXLAN_F_IPV6; |
|
|
|
if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) { |
|
int local_type = |
|
ipv6_addr_type(&conf->saddr.sin6.sin6_addr); |
|
int remote_type = |
|
ipv6_addr_type(&conf->remote_ip.sin6.sin6_addr); |
|
|
|
if (local_type & IPV6_ADDR_LINKLOCAL) { |
|
if (!(remote_type & IPV6_ADDR_LINKLOCAL) && |
|
(remote_type != IPV6_ADDR_ANY)) { |
|
NL_SET_ERR_MSG(extack, |
|
"Invalid combination of local and remote address scopes"); |
|
return -EINVAL; |
|
} |
|
|
|
conf->flags |= VXLAN_F_IPV6_LINKLOCAL; |
|
} else { |
|
if (remote_type == |
|
(IPV6_ADDR_UNICAST | IPV6_ADDR_LINKLOCAL)) { |
|
NL_SET_ERR_MSG(extack, |
|
"Invalid combination of local and remote address scopes"); |
|
return -EINVAL; |
|
} |
|
|
|
conf->flags &= ~VXLAN_F_IPV6_LINKLOCAL; |
|
} |
|
} |
|
} |
|
|
|
if (conf->label && !use_ipv6) { |
|
NL_SET_ERR_MSG(extack, |
|
"Label attribute only applies to IPv6 VXLAN devices"); |
|
return -EINVAL; |
|
} |
|
|
|
if (conf->remote_ifindex) { |
|
struct net_device *lowerdev; |
|
|
|
lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex); |
|
if (!lowerdev) { |
|
NL_SET_ERR_MSG(extack, |
|
"Invalid local interface, device not found"); |
|
return -ENODEV; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
if (use_ipv6) { |
|
struct inet6_dev *idev = __in6_dev_get(lowerdev); |
|
if (idev && idev->cnf.disable_ipv6) { |
|
NL_SET_ERR_MSG(extack, |
|
"IPv6 support disabled by administrator"); |
|
return -EPERM; |
|
} |
|
} |
|
#endif |
|
|
|
*lower = lowerdev; |
|
} else { |
|
if (vxlan_addr_multicast(&conf->remote_ip)) { |
|
NL_SET_ERR_MSG(extack, |
|
"Local interface required for multicast remote destination"); |
|
|
|
return -EINVAL; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
if (conf->flags & VXLAN_F_IPV6_LINKLOCAL) { |
|
NL_SET_ERR_MSG(extack, |
|
"Local interface required for link-local local/remote addresses"); |
|
return -EINVAL; |
|
} |
|
#endif |
|
|
|
*lower = NULL; |
|
} |
|
|
|
if (!conf->dst_port) { |
|
if (conf->flags & VXLAN_F_GPE) |
|
conf->dst_port = htons(4790); /* IANA VXLAN-GPE port */ |
|
else |
|
conf->dst_port = htons(vxlan_port); |
|
} |
|
|
|
if (!conf->age_interval) |
|
conf->age_interval = FDB_AGE_DEFAULT; |
|
|
|
list_for_each_entry(tmp, &vn->vxlan_list, next) { |
|
if (tmp == old) |
|
continue; |
|
|
|
if (tmp->cfg.vni != conf->vni) |
|
continue; |
|
if (tmp->cfg.dst_port != conf->dst_port) |
|
continue; |
|
if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) != |
|
(conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6))) |
|
continue; |
|
|
|
if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) && |
|
tmp->cfg.remote_ifindex != conf->remote_ifindex) |
|
continue; |
|
|
|
NL_SET_ERR_MSG(extack, |
|
"A VXLAN device with the specified VNI already exists"); |
|
return -EEXIST; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void vxlan_config_apply(struct net_device *dev, |
|
struct vxlan_config *conf, |
|
struct net_device *lowerdev, |
|
struct net *src_net, |
|
bool changelink) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_rdst *dst = &vxlan->default_dst; |
|
unsigned short needed_headroom = ETH_HLEN; |
|
bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6); |
|
int max_mtu = ETH_MAX_MTU; |
|
|
|
if (!changelink) { |
|
if (conf->flags & VXLAN_F_GPE) |
|
vxlan_raw_setup(dev); |
|
else |
|
vxlan_ether_setup(dev); |
|
|
|
if (conf->mtu) |
|
dev->mtu = conf->mtu; |
|
|
|
vxlan->net = src_net; |
|
} |
|
|
|
dst->remote_vni = conf->vni; |
|
|
|
memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); |
|
|
|
if (lowerdev) { |
|
dst->remote_ifindex = conf->remote_ifindex; |
|
|
|
dev->gso_max_size = lowerdev->gso_max_size; |
|
dev->gso_max_segs = lowerdev->gso_max_segs; |
|
|
|
needed_headroom = lowerdev->hard_header_len; |
|
needed_headroom += lowerdev->needed_headroom; |
|
|
|
dev->needed_tailroom = lowerdev->needed_tailroom; |
|
|
|
max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : |
|
VXLAN_HEADROOM); |
|
if (max_mtu < ETH_MIN_MTU) |
|
max_mtu = ETH_MIN_MTU; |
|
|
|
if (!changelink && !conf->mtu) |
|
dev->mtu = max_mtu; |
|
} |
|
|
|
if (dev->mtu > max_mtu) |
|
dev->mtu = max_mtu; |
|
|
|
if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
|
needed_headroom += VXLAN6_HEADROOM; |
|
else |
|
needed_headroom += VXLAN_HEADROOM; |
|
dev->needed_headroom = needed_headroom; |
|
|
|
memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
|
} |
|
|
|
static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
|
struct vxlan_config *conf, bool changelink, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct net_device *lowerdev; |
|
int ret; |
|
|
|
ret = vxlan_config_validate(src_net, conf, &lowerdev, vxlan, extack); |
|
if (ret) |
|
return ret; |
|
|
|
vxlan_config_apply(dev, conf, lowerdev, src_net, changelink); |
|
|
|
return 0; |
|
} |
|
|
|
static int __vxlan_dev_create(struct net *net, struct net_device *dev, |
|
struct vxlan_config *conf, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct net_device *remote_dev = NULL; |
|
struct vxlan_fdb *f = NULL; |
|
bool unregister = false; |
|
struct vxlan_rdst *dst; |
|
int err; |
|
|
|
dst = &vxlan->default_dst; |
|
err = vxlan_dev_configure(net, dev, conf, false, extack); |
|
if (err) |
|
return err; |
|
|
|
dev->ethtool_ops = &vxlan_ethtool_ops; |
|
|
|
/* create an fdb entry for a valid default destination */ |
|
if (!vxlan_addr_any(&dst->remote_ip)) { |
|
err = vxlan_fdb_create(vxlan, all_zeros_mac, |
|
&dst->remote_ip, |
|
NUD_REACHABLE | NUD_PERMANENT, |
|
vxlan->cfg.dst_port, |
|
dst->remote_vni, |
|
dst->remote_vni, |
|
dst->remote_ifindex, |
|
NTF_SELF, 0, &f, extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
err = register_netdevice(dev); |
|
if (err) |
|
goto errout; |
|
unregister = true; |
|
|
|
if (dst->remote_ifindex) { |
|
remote_dev = __dev_get_by_index(net, dst->remote_ifindex); |
|
if (!remote_dev) { |
|
err = -ENODEV; |
|
goto errout; |
|
} |
|
|
|
err = netdev_upper_dev_link(remote_dev, dev, extack); |
|
if (err) |
|
goto errout; |
|
} |
|
|
|
err = rtnl_configure_link(dev, NULL); |
|
if (err < 0) |
|
goto unlink; |
|
|
|
if (f) { |
|
vxlan_fdb_insert(vxlan, all_zeros_mac, dst->remote_vni, f); |
|
|
|
/* notify default fdb entry */ |
|
err = vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), |
|
RTM_NEWNEIGH, true, extack); |
|
if (err) { |
|
vxlan_fdb_destroy(vxlan, f, false, false); |
|
if (remote_dev) |
|
netdev_upper_dev_unlink(remote_dev, dev); |
|
goto unregister; |
|
} |
|
} |
|
|
|
list_add(&vxlan->next, &vn->vxlan_list); |
|
if (remote_dev) |
|
dst->remote_dev = remote_dev; |
|
return 0; |
|
unlink: |
|
if (remote_dev) |
|
netdev_upper_dev_unlink(remote_dev, dev); |
|
errout: |
|
/* unregister_netdevice() destroys the default FDB entry with deletion |
|
* notification. But the addition notification was not sent yet, so |
|
* destroy the entry by hand here. |
|
*/ |
|
if (f) |
|
__vxlan_fdb_free(f); |
|
unregister: |
|
if (unregister) |
|
unregister_netdevice(dev); |
|
return err; |
|
} |
|
|
|
/* Set/clear flags based on attribute */ |
|
static int vxlan_nl2flag(struct vxlan_config *conf, struct nlattr *tb[], |
|
int attrtype, unsigned long mask, bool changelink, |
|
bool changelink_supported, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
unsigned long flags; |
|
|
|
if (!tb[attrtype]) |
|
return 0; |
|
|
|
if (changelink && !changelink_supported) { |
|
vxlan_flag_attr_error(attrtype, extack); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (vxlan_policy[attrtype].type == NLA_FLAG) |
|
flags = conf->flags | mask; |
|
else if (nla_get_u8(tb[attrtype])) |
|
flags = conf->flags | mask; |
|
else |
|
flags = conf->flags & ~mask; |
|
|
|
conf->flags = flags; |
|
|
|
return 0; |
|
} |
|
|
|
static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[], |
|
struct net_device *dev, struct vxlan_config *conf, |
|
bool changelink, struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
int err = 0; |
|
|
|
memset(conf, 0, sizeof(*conf)); |
|
|
|
/* if changelink operation, start with old existing cfg */ |
|
if (changelink) |
|
memcpy(conf, &vxlan->cfg, sizeof(*conf)); |
|
|
|
if (data[IFLA_VXLAN_ID]) { |
|
__be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); |
|
|
|
if (changelink && (vni != conf->vni)) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID], "Cannot change VNI"); |
|
return -EOPNOTSUPP; |
|
} |
|
conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); |
|
} |
|
|
|
if (data[IFLA_VXLAN_GROUP]) { |
|
if (changelink && (conf->remote_ip.sa.sa_family != AF_INET)) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP], "New group address family does not match old group"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); |
|
conf->remote_ip.sa.sa_family = AF_INET; |
|
} else if (data[IFLA_VXLAN_GROUP6]) { |
|
if (!IS_ENABLED(CONFIG_IPV6)) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP6], "IPv6 support not enabled in the kernel"); |
|
return -EPFNOSUPPORT; |
|
} |
|
|
|
if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6)) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP6], "New group address family does not match old group"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); |
|
conf->remote_ip.sa.sa_family = AF_INET6; |
|
} |
|
|
|
if (data[IFLA_VXLAN_LOCAL]) { |
|
if (changelink && (conf->saddr.sa.sa_family != AF_INET)) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL], "New local address family does not match old"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); |
|
conf->saddr.sa.sa_family = AF_INET; |
|
} else if (data[IFLA_VXLAN_LOCAL6]) { |
|
if (!IS_ENABLED(CONFIG_IPV6)) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL6], "IPv6 support not enabled in the kernel"); |
|
return -EPFNOSUPPORT; |
|
} |
|
|
|
if (changelink && (conf->saddr.sa.sa_family != AF_INET6)) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL6], "New local address family does not match old"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
/* TODO: respect scope id */ |
|
conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); |
|
conf->saddr.sa.sa_family = AF_INET6; |
|
} |
|
|
|
if (data[IFLA_VXLAN_LINK]) |
|
conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); |
|
|
|
if (data[IFLA_VXLAN_TOS]) |
|
conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
|
|
|
if (data[IFLA_VXLAN_TTL]) |
|
conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
|
|
|
if (data[IFLA_VXLAN_TTL_INHERIT]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_TTL_INHERIT, |
|
VXLAN_F_TTL_INHERIT, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
|
|
} |
|
|
|
if (data[IFLA_VXLAN_LABEL]) |
|
conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) & |
|
IPV6_FLOWLABEL_MASK; |
|
|
|
if (data[IFLA_VXLAN_LEARNING]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_LEARNING, |
|
VXLAN_F_LEARN, changelink, true, |
|
extack); |
|
if (err) |
|
return err; |
|
} else if (!changelink) { |
|
/* default to learn on a new device */ |
|
conf->flags |= VXLAN_F_LEARN; |
|
} |
|
|
|
if (data[IFLA_VXLAN_AGEING]) |
|
conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); |
|
|
|
if (data[IFLA_VXLAN_PROXY]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_PROXY, |
|
VXLAN_F_PROXY, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_RSC]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_RSC, |
|
VXLAN_F_RSC, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_L2MISS]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_L2MISS, |
|
VXLAN_F_L2MISS, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_L3MISS]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_L3MISS, |
|
VXLAN_F_L3MISS, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_LIMIT]) { |
|
if (changelink) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LIMIT], |
|
"Cannot change limit"); |
|
return -EOPNOTSUPP; |
|
} |
|
conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); |
|
} |
|
|
|
if (data[IFLA_VXLAN_COLLECT_METADATA]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_COLLECT_METADATA, |
|
VXLAN_F_COLLECT_METADATA, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_PORT_RANGE]) { |
|
if (!changelink) { |
|
const struct ifla_vxlan_port_range *p |
|
= nla_data(data[IFLA_VXLAN_PORT_RANGE]); |
|
conf->port_min = ntohs(p->low); |
|
conf->port_max = ntohs(p->high); |
|
} else { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT_RANGE], |
|
"Cannot change port range"); |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
if (data[IFLA_VXLAN_PORT]) { |
|
if (changelink) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT], |
|
"Cannot change port"); |
|
return -EOPNOTSUPP; |
|
} |
|
conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); |
|
} |
|
|
|
if (data[IFLA_VXLAN_UDP_CSUM]) { |
|
if (changelink) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_UDP_CSUM], |
|
"Cannot change UDP_CSUM flag"); |
|
return -EOPNOTSUPP; |
|
} |
|
if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
|
conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX; |
|
} |
|
|
|
if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
|
VXLAN_F_UDP_ZERO_CSUM6_TX, changelink, |
|
false, extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, |
|
VXLAN_F_UDP_ZERO_CSUM6_RX, changelink, |
|
false, extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_REMCSUM_TX]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_TX, |
|
VXLAN_F_REMCSUM_TX, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_REMCSUM_RX]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_RX, |
|
VXLAN_F_REMCSUM_RX, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_GBP]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_GBP, |
|
VXLAN_F_GBP, changelink, false, extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_GPE]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_GPE, |
|
VXLAN_F_GPE, changelink, false, |
|
extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) { |
|
err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_NOPARTIAL, |
|
VXLAN_F_REMCSUM_NOPARTIAL, changelink, |
|
false, extack); |
|
if (err) |
|
return err; |
|
} |
|
|
|
if (tb[IFLA_MTU]) { |
|
if (changelink) { |
|
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU], |
|
"Cannot change mtu"); |
|
return -EOPNOTSUPP; |
|
} |
|
conf->mtu = nla_get_u32(tb[IFLA_MTU]); |
|
} |
|
|
|
if (data[IFLA_VXLAN_DF]) |
|
conf->df = nla_get_u8(data[IFLA_VXLAN_DF]); |
|
|
|
return 0; |
|
} |
|
|
|
static int vxlan_newlink(struct net *src_net, struct net_device *dev, |
|
struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_config conf; |
|
int err; |
|
|
|
err = vxlan_nl2conf(tb, data, dev, &conf, false, extack); |
|
if (err) |
|
return err; |
|
|
|
return __vxlan_dev_create(src_net, dev, &conf, extack); |
|
} |
|
|
|
static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[], |
|
struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct net_device *lowerdev; |
|
struct vxlan_config conf; |
|
struct vxlan_rdst *dst; |
|
int err; |
|
|
|
dst = &vxlan->default_dst; |
|
err = vxlan_nl2conf(tb, data, dev, &conf, true, extack); |
|
if (err) |
|
return err; |
|
|
|
err = vxlan_config_validate(vxlan->net, &conf, &lowerdev, |
|
vxlan, extack); |
|
if (err) |
|
return err; |
|
|
|
if (dst->remote_dev == lowerdev) |
|
lowerdev = NULL; |
|
|
|
err = netdev_adjacent_change_prepare(dst->remote_dev, lowerdev, dev, |
|
extack); |
|
if (err) |
|
return err; |
|
|
|
/* handle default dst entry */ |
|
if (!vxlan_addr_equal(&conf.remote_ip, &dst->remote_ip)) { |
|
u32 hash_index = fdb_head_index(vxlan, all_zeros_mac, conf.vni); |
|
|
|
spin_lock_bh(&vxlan->hash_lock[hash_index]); |
|
if (!vxlan_addr_any(&conf.remote_ip)) { |
|
err = vxlan_fdb_update(vxlan, all_zeros_mac, |
|
&conf.remote_ip, |
|
NUD_REACHABLE | NUD_PERMANENT, |
|
NLM_F_APPEND | NLM_F_CREATE, |
|
vxlan->cfg.dst_port, |
|
conf.vni, conf.vni, |
|
conf.remote_ifindex, |
|
NTF_SELF, 0, true, extack); |
|
if (err) { |
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
netdev_adjacent_change_abort(dst->remote_dev, |
|
lowerdev, dev); |
|
return err; |
|
} |
|
} |
|
if (!vxlan_addr_any(&dst->remote_ip)) |
|
__vxlan_fdb_delete(vxlan, all_zeros_mac, |
|
dst->remote_ip, |
|
vxlan->cfg.dst_port, |
|
dst->remote_vni, |
|
dst->remote_vni, |
|
dst->remote_ifindex, |
|
true); |
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
} |
|
|
|
if (conf.age_interval != vxlan->cfg.age_interval) |
|
mod_timer(&vxlan->age_timer, jiffies); |
|
|
|
netdev_adjacent_change_commit(dst->remote_dev, lowerdev, dev); |
|
if (lowerdev && lowerdev != dst->remote_dev) |
|
dst->remote_dev = lowerdev; |
|
vxlan_config_apply(dev, &conf, lowerdev, vxlan->net, true); |
|
return 0; |
|
} |
|
|
|
static void vxlan_dellink(struct net_device *dev, struct list_head *head) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
|
|
vxlan_flush(vxlan, true); |
|
|
|
list_del(&vxlan->next); |
|
unregister_netdevice_queue(dev, head); |
|
if (vxlan->default_dst.remote_dev) |
|
netdev_upper_dev_unlink(vxlan->default_dst.remote_dev, dev); |
|
} |
|
|
|
static size_t vxlan_get_size(const struct net_device *dev) |
|
{ |
|
|
|
return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ |
|
nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
|
nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
|
nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL_INHERIT */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_DF */ |
|
nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
|
nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
|
nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ |
|
nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
|
nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
|
nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ |
|
0; |
|
} |
|
|
|
static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) |
|
{ |
|
const struct vxlan_dev *vxlan = netdev_priv(dev); |
|
const struct vxlan_rdst *dst = &vxlan->default_dst; |
|
struct ifla_vxlan_port_range ports = { |
|
.low = htons(vxlan->cfg.port_min), |
|
.high = htons(vxlan->cfg.port_max), |
|
}; |
|
|
|
if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni))) |
|
goto nla_put_failure; |
|
|
|
if (!vxlan_addr_any(&dst->remote_ip)) { |
|
if (dst->remote_ip.sa.sa_family == AF_INET) { |
|
if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
|
dst->remote_ip.sin.sin_addr.s_addr)) |
|
goto nla_put_failure; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
|
&dst->remote_ip.sin6.sin6_addr)) |
|
goto nla_put_failure; |
|
#endif |
|
} |
|
} |
|
|
|
if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
|
goto nla_put_failure; |
|
|
|
if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
|
if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { |
|
if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
|
vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
|
goto nla_put_failure; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
|
&vxlan->cfg.saddr.sin6.sin6_addr)) |
|
goto nla_put_failure; |
|
#endif |
|
} |
|
} |
|
|
|
if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
|
nla_put_u8(skb, IFLA_VXLAN_TTL_INHERIT, |
|
!!(vxlan->cfg.flags & VXLAN_F_TTL_INHERIT)) || |
|
nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || |
|
nla_put_u8(skb, IFLA_VXLAN_DF, vxlan->cfg.df) || |
|
nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) || |
|
nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
|
!!(vxlan->cfg.flags & VXLAN_F_LEARN)) || |
|
nla_put_u8(skb, IFLA_VXLAN_PROXY, |
|
!!(vxlan->cfg.flags & VXLAN_F_PROXY)) || |
|
nla_put_u8(skb, IFLA_VXLAN_RSC, |
|
!!(vxlan->cfg.flags & VXLAN_F_RSC)) || |
|
nla_put_u8(skb, IFLA_VXLAN_L2MISS, |
|
!!(vxlan->cfg.flags & VXLAN_F_L2MISS)) || |
|
nla_put_u8(skb, IFLA_VXLAN_L3MISS, |
|
!!(vxlan->cfg.flags & VXLAN_F_L3MISS)) || |
|
nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
|
!!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) || |
|
nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
|
nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || |
|
nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || |
|
nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
|
!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM_TX)) || |
|
nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
|
!!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || |
|
nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, |
|
!!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
|
nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, |
|
!!(vxlan->cfg.flags & VXLAN_F_REMCSUM_TX)) || |
|
nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, |
|
!!(vxlan->cfg.flags & VXLAN_F_REMCSUM_RX))) |
|
goto nla_put_failure; |
|
|
|
if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
|
goto nla_put_failure; |
|
|
|
if (vxlan->cfg.flags & VXLAN_F_GBP && |
|
nla_put_flag(skb, IFLA_VXLAN_GBP)) |
|
goto nla_put_failure; |
|
|
|
if (vxlan->cfg.flags & VXLAN_F_GPE && |
|
nla_put_flag(skb, IFLA_VXLAN_GPE)) |
|
goto nla_put_failure; |
|
|
|
if (vxlan->cfg.flags & VXLAN_F_REMCSUM_NOPARTIAL && |
|
nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) |
|
goto nla_put_failure; |
|
|
|
return 0; |
|
|
|
nla_put_failure: |
|
return -EMSGSIZE; |
|
} |
|
|
|
static struct net *vxlan_get_link_net(const struct net_device *dev) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
|
|
return vxlan->net; |
|
} |
|
|
|
static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
|
.kind = "vxlan", |
|
.maxtype = IFLA_VXLAN_MAX, |
|
.policy = vxlan_policy, |
|
.priv_size = sizeof(struct vxlan_dev), |
|
.setup = vxlan_setup, |
|
.validate = vxlan_validate, |
|
.newlink = vxlan_newlink, |
|
.changelink = vxlan_changelink, |
|
.dellink = vxlan_dellink, |
|
.get_size = vxlan_get_size, |
|
.fill_info = vxlan_fill_info, |
|
.get_link_net = vxlan_get_link_net, |
|
}; |
|
|
|
struct net_device *vxlan_dev_create(struct net *net, const char *name, |
|
u8 name_assign_type, |
|
struct vxlan_config *conf) |
|
{ |
|
struct nlattr *tb[IFLA_MAX + 1]; |
|
struct net_device *dev; |
|
int err; |
|
|
|
memset(&tb, 0, sizeof(tb)); |
|
|
|
dev = rtnl_create_link(net, name, name_assign_type, |
|
&vxlan_link_ops, tb, NULL); |
|
if (IS_ERR(dev)) |
|
return dev; |
|
|
|
err = __vxlan_dev_create(net, dev, conf, NULL); |
|
if (err < 0) { |
|
free_netdev(dev); |
|
return ERR_PTR(err); |
|
} |
|
|
|
err = rtnl_configure_link(dev, NULL); |
|
if (err < 0) { |
|
LIST_HEAD(list_kill); |
|
|
|
vxlan_dellink(dev, &list_kill); |
|
unregister_netdevice_many(&list_kill); |
|
return ERR_PTR(err); |
|
} |
|
|
|
return dev; |
|
} |
|
EXPORT_SYMBOL_GPL(vxlan_dev_create); |
|
|
|
static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
|
struct net_device *dev) |
|
{ |
|
struct vxlan_dev *vxlan, *next; |
|
LIST_HEAD(list_kill); |
|
|
|
list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { |
|
struct vxlan_rdst *dst = &vxlan->default_dst; |
|
|
|
/* In case we created vxlan device with carrier |
|
* and we loose the carrier due to module unload |
|
* we also need to remove vxlan device. In other |
|
* cases, it's not necessary and remote_ifindex |
|
* is 0 here, so no matches. |
|
*/ |
|
if (dst->remote_ifindex == dev->ifindex) |
|
vxlan_dellink(vxlan->dev, &list_kill); |
|
} |
|
|
|
unregister_netdevice_many(&list_kill); |
|
} |
|
|
|
static int vxlan_netdevice_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
|
struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
|
|
|
if (event == NETDEV_UNREGISTER) |
|
vxlan_handle_lowerdev_unregister(vn, dev); |
|
else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
|
vxlan_offload_rx_ports(dev, true); |
|
else if (event == NETDEV_UDP_TUNNEL_DROP_INFO) |
|
vxlan_offload_rx_ports(dev, false); |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static struct notifier_block vxlan_notifier_block __read_mostly = { |
|
.notifier_call = vxlan_netdevice_event, |
|
}; |
|
|
|
static void |
|
vxlan_fdb_offloaded_set(struct net_device *dev, |
|
struct switchdev_notifier_vxlan_fdb_info *fdb_info) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_rdst *rdst; |
|
struct vxlan_fdb *f; |
|
u32 hash_index; |
|
|
|
hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni); |
|
|
|
spin_lock_bh(&vxlan->hash_lock[hash_index]); |
|
|
|
f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni); |
|
if (!f) |
|
goto out; |
|
|
|
rdst = vxlan_fdb_find_rdst(f, &fdb_info->remote_ip, |
|
fdb_info->remote_port, |
|
fdb_info->remote_vni, |
|
fdb_info->remote_ifindex); |
|
if (!rdst) |
|
goto out; |
|
|
|
rdst->offloaded = fdb_info->offloaded; |
|
|
|
out: |
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
} |
|
|
|
static int |
|
vxlan_fdb_external_learn_add(struct net_device *dev, |
|
struct switchdev_notifier_vxlan_fdb_info *fdb_info) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct netlink_ext_ack *extack; |
|
u32 hash_index; |
|
int err; |
|
|
|
hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni); |
|
extack = switchdev_notifier_info_to_extack(&fdb_info->info); |
|
|
|
spin_lock_bh(&vxlan->hash_lock[hash_index]); |
|
err = vxlan_fdb_update(vxlan, fdb_info->eth_addr, &fdb_info->remote_ip, |
|
NUD_REACHABLE, |
|
NLM_F_CREATE | NLM_F_REPLACE, |
|
fdb_info->remote_port, |
|
fdb_info->vni, |
|
fdb_info->remote_vni, |
|
fdb_info->remote_ifindex, |
|
NTF_USE | NTF_SELF | NTF_EXT_LEARNED, |
|
0, false, extack); |
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
|
|
return err; |
|
} |
|
|
|
static int |
|
vxlan_fdb_external_learn_del(struct net_device *dev, |
|
struct switchdev_notifier_vxlan_fdb_info *fdb_info) |
|
{ |
|
struct vxlan_dev *vxlan = netdev_priv(dev); |
|
struct vxlan_fdb *f; |
|
u32 hash_index; |
|
int err = 0; |
|
|
|
hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni); |
|
spin_lock_bh(&vxlan->hash_lock[hash_index]); |
|
|
|
f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni); |
|
if (!f) |
|
err = -ENOENT; |
|
else if (f->flags & NTF_EXT_LEARNED) |
|
err = __vxlan_fdb_delete(vxlan, fdb_info->eth_addr, |
|
fdb_info->remote_ip, |
|
fdb_info->remote_port, |
|
fdb_info->vni, |
|
fdb_info->remote_vni, |
|
fdb_info->remote_ifindex, |
|
false); |
|
|
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
|
|
return err; |
|
} |
|
|
|
static int vxlan_switchdev_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct net_device *dev = switchdev_notifier_info_to_dev(ptr); |
|
struct switchdev_notifier_vxlan_fdb_info *fdb_info; |
|
int err = 0; |
|
|
|
switch (event) { |
|
case SWITCHDEV_VXLAN_FDB_OFFLOADED: |
|
vxlan_fdb_offloaded_set(dev, ptr); |
|
break; |
|
case SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE: |
|
fdb_info = ptr; |
|
err = vxlan_fdb_external_learn_add(dev, fdb_info); |
|
if (err) { |
|
err = notifier_from_errno(err); |
|
break; |
|
} |
|
fdb_info->offloaded = true; |
|
vxlan_fdb_offloaded_set(dev, fdb_info); |
|
break; |
|
case SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE: |
|
fdb_info = ptr; |
|
err = vxlan_fdb_external_learn_del(dev, fdb_info); |
|
if (err) { |
|
err = notifier_from_errno(err); |
|
break; |
|
} |
|
fdb_info->offloaded = false; |
|
vxlan_fdb_offloaded_set(dev, fdb_info); |
|
break; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static struct notifier_block vxlan_switchdev_notifier_block __read_mostly = { |
|
.notifier_call = vxlan_switchdev_event, |
|
}; |
|
|
|
static void vxlan_fdb_nh_flush(struct nexthop *nh) |
|
{ |
|
struct vxlan_fdb *fdb; |
|
struct vxlan_dev *vxlan; |
|
u32 hash_index; |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(fdb, &nh->fdb_list, nh_list) { |
|
vxlan = rcu_dereference(fdb->vdev); |
|
WARN_ON(!vxlan); |
|
hash_index = fdb_head_index(vxlan, fdb->eth_addr, |
|
vxlan->default_dst.remote_vni); |
|
spin_lock_bh(&vxlan->hash_lock[hash_index]); |
|
if (!hlist_unhashed(&fdb->hlist)) |
|
vxlan_fdb_destroy(vxlan, fdb, false, false); |
|
spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
|
} |
|
rcu_read_unlock(); |
|
} |
|
|
|
static int vxlan_nexthop_event(struct notifier_block *nb, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct nh_notifier_info *info = ptr; |
|
struct nexthop *nh; |
|
|
|
if (event != NEXTHOP_EVENT_DEL) |
|
return NOTIFY_DONE; |
|
|
|
nh = nexthop_find_by_id(info->net, info->id); |
|
if (!nh) |
|
return NOTIFY_DONE; |
|
|
|
vxlan_fdb_nh_flush(nh); |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static __net_init int vxlan_init_net(struct net *net) |
|
{ |
|
struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
|
unsigned int h; |
|
|
|
INIT_LIST_HEAD(&vn->vxlan_list); |
|
spin_lock_init(&vn->sock_lock); |
|
vn->nexthop_notifier_block.notifier_call = vxlan_nexthop_event; |
|
|
|
for (h = 0; h < PORT_HASH_SIZE; ++h) |
|
INIT_HLIST_HEAD(&vn->sock_list[h]); |
|
|
|
return register_nexthop_notifier(net, &vn->nexthop_notifier_block, |
|
NULL); |
|
} |
|
|
|
static void vxlan_destroy_tunnels(struct net *net, struct list_head *head) |
|
{ |
|
struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
|
struct vxlan_dev *vxlan, *next; |
|
struct net_device *dev, *aux; |
|
|
|
for_each_netdev_safe(net, dev, aux) |
|
if (dev->rtnl_link_ops == &vxlan_link_ops) |
|
unregister_netdevice_queue(dev, head); |
|
|
|
list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { |
|
/* If vxlan->dev is in the same netns, it has already been added |
|
* to the list by the previous loop. |
|
*/ |
|
if (!net_eq(dev_net(vxlan->dev), net)) |
|
unregister_netdevice_queue(vxlan->dev, head); |
|
} |
|
|
|
} |
|
|
|
static void __net_exit vxlan_exit_batch_net(struct list_head *net_list) |
|
{ |
|
struct net *net; |
|
LIST_HEAD(list); |
|
unsigned int h; |
|
|
|
rtnl_lock(); |
|
list_for_each_entry(net, net_list, exit_list) { |
|
struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
|
|
|
unregister_nexthop_notifier(net, &vn->nexthop_notifier_block); |
|
} |
|
list_for_each_entry(net, net_list, exit_list) |
|
vxlan_destroy_tunnels(net, &list); |
|
|
|
unregister_netdevice_many(&list); |
|
rtnl_unlock(); |
|
|
|
list_for_each_entry(net, net_list, exit_list) { |
|
struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
|
|
|
for (h = 0; h < PORT_HASH_SIZE; ++h) |
|
WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h])); |
|
} |
|
} |
|
|
|
static struct pernet_operations vxlan_net_ops = { |
|
.init = vxlan_init_net, |
|
.exit_batch = vxlan_exit_batch_net, |
|
.id = &vxlan_net_id, |
|
.size = sizeof(struct vxlan_net), |
|
}; |
|
|
|
static int __init vxlan_init_module(void) |
|
{ |
|
int rc; |
|
|
|
get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
|
|
|
rc = register_pernet_subsys(&vxlan_net_ops); |
|
if (rc) |
|
goto out1; |
|
|
|
rc = register_netdevice_notifier(&vxlan_notifier_block); |
|
if (rc) |
|
goto out2; |
|
|
|
rc = register_switchdev_notifier(&vxlan_switchdev_notifier_block); |
|
if (rc) |
|
goto out3; |
|
|
|
rc = rtnl_link_register(&vxlan_link_ops); |
|
if (rc) |
|
goto out4; |
|
|
|
return 0; |
|
out4: |
|
unregister_switchdev_notifier(&vxlan_switchdev_notifier_block); |
|
out3: |
|
unregister_netdevice_notifier(&vxlan_notifier_block); |
|
out2: |
|
unregister_pernet_subsys(&vxlan_net_ops); |
|
out1: |
|
return rc; |
|
} |
|
late_initcall(vxlan_init_module); |
|
|
|
static void __exit vxlan_cleanup_module(void) |
|
{ |
|
rtnl_link_unregister(&vxlan_link_ops); |
|
unregister_switchdev_notifier(&vxlan_switchdev_notifier_block); |
|
unregister_netdevice_notifier(&vxlan_notifier_block); |
|
unregister_pernet_subsys(&vxlan_net_ops); |
|
/* rcu_barrier() is called by netns */ |
|
} |
|
module_exit(vxlan_cleanup_module); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_VERSION(VXLAN_VERSION); |
|
MODULE_AUTHOR("Stephen Hemminger <[email protected]>"); |
|
MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
|
MODULE_ALIAS_RTNL_LINK("vxlan");
|
|
|