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vxlan: Factor out device configuration

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This factors out the device configuration out of the RTNL newlink
API which allows for in-kernel creation of VXLAN net_devices.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2015-07-21 10:44:02 +02:00 committed by David S. Miller
parent e7030878fc
commit 0dfbdf4102
2 changed files with 258 additions and 177 deletions
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376
drivers/net/vxlan.c
View File

@ -55,10 +55,6 @@
#define PORT_HASH_BITS 8 #define PORT_HASH_BITS 8
#define PORT_HASH_SIZE (1<<PORT_HASH_BITS) #define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
#define VNI_HASH_BITS 10
#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
#define FDB_HASH_BITS 8
#define FDB_HASH_SIZE (1<<FDB_HASH_BITS)
#define FDB_AGE_DEFAULT 300 /* 5 min */ #define FDB_AGE_DEFAULT 300 /* 5 min */
#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
@ -75,6 +71,7 @@ module_param(log_ecn_error, bool, 0644);
MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
static int vxlan_net_id; static int vxlan_net_id;
static struct rtnl_link_ops vxlan_link_ops;
static const u8 all_zeros_mac[ETH_ALEN]; static const u8 all_zeros_mac[ETH_ALEN];
@ -85,21 +82,6 @@ struct vxlan_net {
spinlock_t sock_lock; spinlock_t sock_lock;
}; };
union vxlan_addr {
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr sa;
};
struct vxlan_rdst {
union vxlan_addr remote_ip;
__be16 remote_port;
u32 remote_vni;
u32 remote_ifindex;
struct list_head list;
struct rcu_head rcu;
};
/* Forwarding table entry */ /* Forwarding table entry */
struct vxlan_fdb { struct vxlan_fdb {
struct hlist_node hlist; /* linked list of entries */ struct hlist_node hlist; /* linked list of entries */
@ -112,31 +94,6 @@ struct vxlan_fdb {
u8 flags; /* see ndm_flags */ u8 flags; /* see ndm_flags */
}; };
/* Pseudo network device */
struct vxlan_dev {
struct hlist_node hlist; /* vni hash table */
struct list_head next; /* vxlan's per namespace list */
struct vxlan_sock *vn_sock; /* listening socket */
struct net_device *dev;
struct net *net; /* netns for packet i/o */
struct vxlan_rdst default_dst; /* default destination */
union vxlan_addr saddr; /* source address */
__be16 dst_port;
__u16 port_min; /* source port range */
__u16 port_max;
__u8 tos; /* TOS override */
__u8 ttl;
u32 flags; /* VXLAN_F_* in vxlan.h */
unsigned long age_interval;
struct timer_list age_timer;
spinlock_t hash_lock;
unsigned int addrcnt;
unsigned int addrmax;
struct hlist_head fdb_head[FDB_HASH_SIZE];
};
/* salt for hash table */ /* salt for hash table */
static u32 vxlan_salt __read_mostly; static u32 vxlan_salt __read_mostly;
static struct workqueue_struct *vxlan_wq; static struct workqueue_struct *vxlan_wq;
@ -352,7 +309,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
goto nla_put_failure; goto nla_put_failure;
if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
nla_put_be16(skb, NDA_PORT, rdst->remote_port)) nla_put_be16(skb, NDA_PORT, rdst->remote_port))
goto nla_put_failure; goto nla_put_failure;
if (rdst->remote_vni != vxlan->default_dst.remote_vni && if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
@ -756,7 +713,8 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
if (!(flags & NLM_F_CREATE)) if (!(flags & NLM_F_CREATE))
return -ENOENT; return -ENOENT;
if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) if (vxlan->cfg.addrmax &&
vxlan->addrcnt >= vxlan->cfg.addrmax)
return -ENOSPC; return -ENOSPC;
/* Disallow replace to add a multicast entry */ /* Disallow replace to add a multicast entry */
@ -842,7 +800,7 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
return -EINVAL; return -EINVAL;
*port = nla_get_be16(tb[NDA_PORT]); *port = nla_get_be16(tb[NDA_PORT]);
} else { } else {
*port = vxlan->dst_port; *port = vxlan->cfg.dst_port;
} }
if (tb[NDA_VNI]) { if (tb[NDA_VNI]) {
@ -1028,7 +986,7 @@ static bool vxlan_snoop(struct net_device *dev,
vxlan_fdb_create(vxlan, src_mac, src_ip, vxlan_fdb_create(vxlan, src_mac, src_ip,
NUD_REACHABLE, NUD_REACHABLE,
NLM_F_EXCL|NLM_F_CREATE, NLM_F_EXCL|NLM_F_CREATE,
vxlan->dst_port, vxlan->cfg.dst_port,
vxlan->default_dst.remote_vni, vxlan->default_dst.remote_vni,
0, NTF_SELF); 0, NTF_SELF);
spin_unlock(&vxlan->hash_lock); spin_unlock(&vxlan->hash_lock);
@ -1957,7 +1915,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
info = skb_tunnel_info(skb, AF_INET); info = skb_tunnel_info(skb, AF_INET);
if (rdst) { if (rdst) {
dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
vni = rdst->remote_vni; vni = rdst->remote_vni;
dst = &rdst->remote_ip; dst = &rdst->remote_ip;
} else { } else {
@ -1967,7 +1925,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
goto drop; goto drop;
} }
dst_port = info->key.tp_dst ? : vxlan->dst_port; dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
vni = be64_to_cpu(info->key.tun_id); vni = be64_to_cpu(info->key.tun_id);
remote_ip.sin.sin_family = AF_INET; remote_ip.sin.sin_family = AF_INET;
remote_ip.sin.sin_addr.s_addr = info->key.ipv4_dst; remote_ip.sin.sin_addr.s_addr = info->key.ipv4_dst;
@ -1985,16 +1943,16 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
old_iph = ip_hdr(skb); old_iph = ip_hdr(skb);
ttl = vxlan->ttl; ttl = vxlan->cfg.ttl;
if (!ttl && vxlan_addr_multicast(dst)) if (!ttl && vxlan_addr_multicast(dst))
ttl = 1; ttl = 1;
tos = vxlan->tos; tos = vxlan->cfg.tos;
if (tos == 1) if (tos == 1)
tos = ip_tunnel_get_dsfield(old_iph, skb); tos = ip_tunnel_get_dsfield(old_iph, skb);
src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->port_min, src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
vxlan->port_max, true); vxlan->cfg.port_max, true);
if (dst->sa.sa_family == AF_INET) { if (dst->sa.sa_family == AF_INET) {
if (info) { if (info) {
@ -2020,7 +1978,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
fl4.flowi4_mark = skb->mark; fl4.flowi4_mark = skb->mark;
fl4.flowi4_proto = IPPROTO_UDP; fl4.flowi4_proto = IPPROTO_UDP;
fl4.daddr = dst->sin.sin_addr.s_addr; fl4.daddr = dst->sin.sin_addr.s_addr;
fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr; fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr;
rt = ip_route_output_key(vxlan->net, &fl4); rt = ip_route_output_key(vxlan->net, &fl4);
if (IS_ERR(rt)) { if (IS_ERR(rt)) {
@ -2076,7 +2034,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
memset(&fl6, 0, sizeof(fl6)); memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_oif = rdst ? rdst->remote_ifindex : 0; fl6.flowi6_oif = rdst ? rdst->remote_ifindex : 0;
fl6.daddr = dst->sin6.sin6_addr; fl6.daddr = dst->sin6.sin6_addr;
fl6.saddr = vxlan->saddr.sin6.sin6_addr; fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr;
fl6.flowi6_mark = skb->mark; fl6.flowi6_mark = skb->mark;
fl6.flowi6_proto = IPPROTO_UDP; fl6.flowi6_proto = IPPROTO_UDP;
@ -2247,7 +2205,7 @@ static void vxlan_cleanup(unsigned long arg)
if (f->state & NUD_PERMANENT) if (f->state & NUD_PERMANENT)
continue; continue;
timeout = f->used + vxlan->age_interval * HZ; timeout = f->used + vxlan->cfg.age_interval * HZ;
if (time_before_eq(timeout, jiffies)) { if (time_before_eq(timeout, jiffies)) {
netdev_dbg(vxlan->dev, netdev_dbg(vxlan->dev,
"garbage collect %pM\n", "garbage collect %pM\n",
@ -2311,8 +2269,8 @@ static int vxlan_open(struct net_device *dev)
struct vxlan_sock *vs; struct vxlan_sock *vs;
int ret = 0; int ret = 0;
vs = vxlan_sock_add(vxlan->net, vxlan->dst_port, vxlan_rcv, NULL, vs = vxlan_sock_add(vxlan->net, vxlan->cfg.dst_port, vxlan_rcv,
false, vxlan->flags); NULL, vxlan->cfg.no_share, vxlan->flags);
if (IS_ERR(vs)) if (IS_ERR(vs))
return PTR_ERR(vs); return PTR_ERR(vs);
@ -2326,7 +2284,7 @@ static int vxlan_open(struct net_device *dev)
} }
} }
if (vxlan->age_interval) if (vxlan->cfg.age_interval)
mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
return ret; return ret;
@ -2484,7 +2442,7 @@ static void vxlan_setup(struct net_device *dev)
vxlan->age_timer.function = vxlan_cleanup; vxlan->age_timer.function = vxlan_cleanup;
vxlan->age_timer.data = (unsigned long) vxlan; vxlan->age_timer.data = (unsigned long) vxlan;
vxlan->dst_port = htons(vxlan_port); vxlan->cfg.dst_port = htons(vxlan_port);
vxlan->dev = dev; vxlan->dev = dev;
@ -2684,54 +2642,35 @@ struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
} }
EXPORT_SYMBOL_GPL(vxlan_sock_add); EXPORT_SYMBOL_GPL(vxlan_sock_add);
static int vxlan_newlink(struct net *src_net, struct net_device *dev, static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[]) struct vxlan_config *conf)
{ {
struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
struct vxlan_dev *vxlan = netdev_priv(dev); struct vxlan_dev *vxlan = netdev_priv(dev);
struct vxlan_rdst *dst = &vxlan->default_dst; struct vxlan_rdst *dst = &vxlan->default_dst;
__u32 vni;
int err; int err;
bool use_ipv6 = false; bool use_ipv6 = false;
__be16 default_port = vxlan->cfg.dst_port;
if (!data[IFLA_VXLAN_ID])
return -EINVAL;
vxlan->net = src_net; vxlan->net = src_net;
vni = nla_get_u32(data[IFLA_VXLAN_ID]); dst->remote_vni = conf->vni;
dst->remote_vni = vni;
memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
/* Unless IPv6 is explicitly requested, assume IPv4 */ /* Unless IPv6 is explicitly requested, assume IPv4 */
dst->remote_ip.sa.sa_family = AF_INET; if (!dst->remote_ip.sa.sa_family)
if (data[IFLA_VXLAN_GROUP]) { dst->remote_ip.sa.sa_family = AF_INET;
dst->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
} else if (data[IFLA_VXLAN_GROUP6]) {
if (!IS_ENABLED(CONFIG_IPV6))
return -EPFNOSUPPORT;
dst->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); if (dst->remote_ip.sa.sa_family == AF_INET6 ||
dst->remote_ip.sa.sa_family = AF_INET6; vxlan->cfg.saddr.sa.sa_family == AF_INET6)
use_ipv6 = true; use_ipv6 = true;
}
if (data[IFLA_VXLAN_LOCAL]) { if (conf->remote_ifindex) {
vxlan->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
vxlan->saddr.sa.sa_family = AF_INET;
} else if (data[IFLA_VXLAN_LOCAL6]) {
if (!IS_ENABLED(CONFIG_IPV6))
return -EPFNOSUPPORT;
/* TODO: respect scope id */
vxlan->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
vxlan->saddr.sa.sa_family = AF_INET6;
use_ipv6 = true;
}
if (data[IFLA_VXLAN_LINK] &&
(dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) {
struct net_device *lowerdev struct net_device *lowerdev
= __dev_get_by_index(src_net, dst->remote_ifindex); = __dev_get_by_index(src_net, conf->remote_ifindex);
dst->remote_ifindex = conf->remote_ifindex;
if (!lowerdev) { if (!lowerdev) {
pr_info("ifindex %d does not exist\n", dst->remote_ifindex); pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
@ -2749,7 +2688,7 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
} }
#endif #endif
if (!tb[IFLA_MTU]) if (!conf->mtu)
dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
dev->needed_headroom = lowerdev->hard_header_len + dev->needed_headroom = lowerdev->hard_header_len +
@ -2757,79 +2696,17 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
} else if (use_ipv6) } else if (use_ipv6)
vxlan->flags |= VXLAN_F_IPV6; vxlan->flags |= VXLAN_F_IPV6;
if (data[IFLA_VXLAN_TOS]) memcpy(&vxlan->cfg, conf, sizeof(*conf));
vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); if (!vxlan->cfg.dst_port)
vxlan->cfg.dst_port = default_port;
vxlan->flags |= conf->flags;
if (data[IFLA_VXLAN_TTL]) if (!vxlan->cfg.age_interval)
vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) if (vxlan_find_vni(src_net, conf->vni, use_ipv6 ? AF_INET6 : AF_INET,
vxlan->flags |= VXLAN_F_LEARN; vxlan->cfg.dst_port, vxlan->flags))
if (data[IFLA_VXLAN_AGEING])
vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
else
vxlan->age_interval = FDB_AGE_DEFAULT;
if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
vxlan->flags |= VXLAN_F_PROXY;
if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
vxlan->flags |= VXLAN_F_RSC;
if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
vxlan->flags |= VXLAN_F_L2MISS;
if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
vxlan->flags |= VXLAN_F_L3MISS;
if (data[IFLA_VXLAN_LIMIT])
vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
if (data[IFLA_VXLAN_FLOWBASED] &&
nla_get_u8(data[IFLA_VXLAN_FLOWBASED]))
vxlan->flags |= VXLAN_F_FLOW_BASED;
if (data[IFLA_VXLAN_PORT_RANGE]) {
const struct ifla_vxlan_port_range *p
= nla_data(data[IFLA_VXLAN_PORT_RANGE]);
vxlan->port_min = ntohs(p->low);
vxlan->port_max = ntohs(p->high);
}
if (data[IFLA_VXLAN_PORT])
vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
vxlan->flags |= VXLAN_F_UDP_CSUM;
if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
if (data[IFLA_VXLAN_REMCSUM_TX] &&
nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
vxlan->flags |= VXLAN_F_REMCSUM_TX;
if (data[IFLA_VXLAN_REMCSUM_RX] &&
nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
vxlan->flags |= VXLAN_F_REMCSUM_RX;
if (data[IFLA_VXLAN_GBP])
vxlan->flags |= VXLAN_F_GBP;
if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
vxlan->flags |= VXLAN_F_REMCSUM_NOPARTIAL;
if (vxlan_find_vni(src_net, vni, use_ipv6 ? AF_INET6 : AF_INET,
vxlan->dst_port, vxlan->flags)) {
pr_info("duplicate VNI %u\n", vni);
return -EEXIST; return -EEXIST;
}
dev->ethtool_ops = &vxlan_ethtool_ops; dev->ethtool_ops = &vxlan_ethtool_ops;
@ -2839,7 +2716,7 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
&vxlan->default_dst.remote_ip, &vxlan->default_dst.remote_ip,
NUD_REACHABLE|NUD_PERMANENT, NUD_REACHABLE|NUD_PERMANENT,
NLM_F_EXCL|NLM_F_CREATE, NLM_F_EXCL|NLM_F_CREATE,
vxlan->dst_port, vxlan->cfg.dst_port,
vxlan->default_dst.remote_vni, vxlan->default_dst.remote_vni,
vxlan->default_dst.remote_ifindex, vxlan->default_dst.remote_ifindex,
NTF_SELF); NTF_SELF);
@ -2858,6 +2735,151 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
return 0; return 0;
} }
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);
if (IS_ERR(dev))
return dev;
err = vxlan_dev_configure(net, dev, conf);
if (err < 0) {
free_netdev(dev);
return ERR_PTR(err);
}
return dev;
}
EXPORT_SYMBOL_GPL(vxlan_dev_create);
static int vxlan_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
struct vxlan_config conf;
int err;
if (!data[IFLA_VXLAN_ID])
return -EINVAL;
memset(&conf, 0, sizeof(conf));
conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]);
if (data[IFLA_VXLAN_GROUP]) {
conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
} else if (data[IFLA_VXLAN_GROUP6]) {
if (!IS_ENABLED(CONFIG_IPV6))
return -EPFNOSUPPORT;
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]) {
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))
return -EPFNOSUPPORT;
/* 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_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
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] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
conf.flags |= VXLAN_F_PROXY;
if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
conf.flags |= VXLAN_F_RSC;
if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
conf.flags |= VXLAN_F_L2MISS;
if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
conf.flags |= VXLAN_F_L3MISS;
if (data[IFLA_VXLAN_LIMIT])
conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
if (data[IFLA_VXLAN_FLOWBASED] &&
nla_get_u8(data[IFLA_VXLAN_FLOWBASED]))
conf.flags |= VXLAN_F_FLOW_BASED;
if (data[IFLA_VXLAN_PORT_RANGE]) {
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);
}
if (data[IFLA_VXLAN_PORT])
conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
conf.flags |= VXLAN_F_UDP_CSUM;
if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
if (data[IFLA_VXLAN_REMCSUM_TX] &&
nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
conf.flags |= VXLAN_F_REMCSUM_TX;
if (data[IFLA_VXLAN_REMCSUM_RX] &&
nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
conf.flags |= VXLAN_F_REMCSUM_RX;
if (data[IFLA_VXLAN_GBP])
conf.flags |= VXLAN_F_GBP;
if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
err = vxlan_dev_configure(src_net, dev, &conf);
switch (err) {
case -ENODEV:
pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
break;
case -EPERM:
pr_info("IPv6 is disabled via sysctl\n");
break;
case -EEXIST:
pr_info("duplicate VNI %u\n", conf.vni);
break;
}
return err;
}
static void vxlan_dellink(struct net_device *dev, struct list_head *head) static void vxlan_dellink(struct net_device *dev, struct list_head *head)
{ {
struct vxlan_dev *vxlan = netdev_priv(dev); struct vxlan_dev *vxlan = netdev_priv(dev);
@ -2904,8 +2926,8 @@ 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_dev *vxlan = netdev_priv(dev);
const struct vxlan_rdst *dst = &vxlan->default_dst; const struct vxlan_rdst *dst = &vxlan->default_dst;
struct ifla_vxlan_port_range ports = { struct ifla_vxlan_port_range ports = {
.low = htons(vxlan->port_min), .low = htons(vxlan->cfg.port_min),
.high = htons(vxlan->port_max), .high = htons(vxlan->cfg.port_max),
}; };
if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni))
@ -2928,22 +2950,22 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
goto nla_put_failure; goto nla_put_failure;
if (!vxlan_addr_any(&vxlan->saddr)) { if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
if (vxlan->saddr.sa.sa_family == AF_INET) { if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
vxlan->saddr.sin.sin_addr.s_addr)) vxlan->cfg.saddr.sin.sin_addr.s_addr))
goto nla_put_failure; goto nla_put_failure;
#if IS_ENABLED(CONFIG_IPV6) #if IS_ENABLED(CONFIG_IPV6)
} else { } else {
if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
&vxlan->saddr.sin6.sin6_addr)) &vxlan->cfg.saddr.sin6.sin6_addr))
goto nla_put_failure; goto nla_put_failure;
#endif #endif
} }
} }
if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
nla_put_u8(skb, IFLA_VXLAN_LEARNING, nla_put_u8(skb, IFLA_VXLAN_LEARNING,
!!(vxlan->flags & VXLAN_F_LEARN)) || !!(vxlan->flags & VXLAN_F_LEARN)) ||
nla_put_u8(skb, IFLA_VXLAN_PROXY, nla_put_u8(skb, IFLA_VXLAN_PROXY,
@ -2955,9 +2977,9 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
!!(vxlan->flags & VXLAN_F_L3MISS)) || !!(vxlan->flags & VXLAN_F_L3MISS)) ||
nla_put_u8(skb, IFLA_VXLAN_FLOWBASED, nla_put_u8(skb, IFLA_VXLAN_FLOWBASED,
!!(vxlan->flags & VXLAN_F_FLOW_BASED)) || !!(vxlan->flags & VXLAN_F_FLOW_BASED)) ||
nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port) || nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
!!(vxlan->flags & VXLAN_F_UDP_CSUM)) || !!(vxlan->flags & VXLAN_F_UDP_CSUM)) ||
nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,

59
include/net/vxlan.h
View File

@ -95,6 +95,11 @@ struct vxlanhdr {
#define VXLAN_VNI_MASK (VXLAN_VID_MASK << 8) #define VXLAN_VNI_MASK (VXLAN_VID_MASK << 8)
#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
#define VNI_HASH_BITS 10
#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
#define FDB_HASH_BITS 8
#define FDB_HASH_SIZE (1<<FDB_HASH_BITS)
struct vxlan_metadata { struct vxlan_metadata {
__be32 vni; __be32 vni;
u32 gbp; u32 gbp;
@ -121,6 +126,57 @@ struct vxlan_sock {
u32 flags; u32 flags;
}; };
union vxlan_addr {
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr sa;
};
struct vxlan_rdst {
union vxlan_addr remote_ip;
__be16 remote_port;
u32 remote_vni;
u32 remote_ifindex;
struct list_head list;
struct rcu_head rcu;
};
struct vxlan_config {
union vxlan_addr remote_ip;
union vxlan_addr saddr;
u32 vni;
int remote_ifindex;
int mtu;
__be16 dst_port;
__u16 port_min;
__u16 port_max;
__u8 tos;
__u8 ttl;
u32 flags;
unsigned long age_interval;
unsigned int addrmax;
bool no_share;
};
/* Pseudo network device */
struct vxlan_dev {
struct hlist_node hlist; /* vni hash table */
struct list_head next; /* vxlan's per namespace list */
struct vxlan_sock *vn_sock; /* listening socket */
struct net_device *dev;
struct net *net; /* netns for packet i/o */
struct vxlan_rdst default_dst; /* default destination */
u32 flags; /* VXLAN_F_* in vxlan.h */
struct timer_list age_timer;
spinlock_t hash_lock;
unsigned int addrcnt;
struct vxlan_config cfg;
struct hlist_head fdb_head[FDB_HASH_SIZE];
};
#define VXLAN_F_LEARN 0x01 #define VXLAN_F_LEARN 0x01
#define VXLAN_F_PROXY 0x02 #define VXLAN_F_PROXY 0x02
#define VXLAN_F_RSC 0x04 #define VXLAN_F_RSC 0x04
@ -151,6 +207,9 @@ struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
vxlan_rcv_t *rcv, void *data, vxlan_rcv_t *rcv, void *data,
bool no_share, u32 flags); bool no_share, u32 flags);
struct net_device *vxlan_dev_create(struct net *net, const char *name,
u8 name_assign_type, struct vxlan_config *conf);
void vxlan_sock_release(struct vxlan_sock *vs); void vxlan_sock_release(struct vxlan_sock *vs);
int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,