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Commit 3f5d6af0 authored by Stephen Hemminger's avatar Stephen Hemminger
Browse files

Merge ../vxlan-x

parents 8599b52e 537f7f84

drivers/net/vxlan.c

+354 −208
Original line number Diff line number Diff line
@@ -68,24 +68,26 @@ struct vxlanhdr { 


/* UDP port for VXLAN traffic.

 * The IANA assigned port is 4789, but the Linux default is 8472

 * for compatability with early adopters.

 * for compatibility with early adopters.

 */

static unsigned int vxlan_port __read_mostly = 8472;

module_param_named(udp_port, vxlan_port, uint, 0444);

static unsigned short vxlan_port __read_mostly = 8472;

module_param_named(udp_port, vxlan_port, ushort, 0444);

MODULE_PARM_DESC(udp_port, "Destination UDP port");



static bool log_ecn_error = true;

module_param(log_ecn_error, bool, 0644);

MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");



static unsigned int vxlan_net_id;

static int vxlan_net_id;



static const u8 all_zeros_mac[ETH_ALEN];



/* per UDP socket information */

struct vxlan_sock {

	struct hlist_node hlist;

	struct rcu_head	  rcu;

	struct work_struct del_work;

	unsigned int	  refcnt;

	atomic_t	  refcnt;

	struct socket	  *sock;

	struct hlist_head vni_list[VNI_HASH_SIZE];

};
@@ -94,6 +96,7 @@ struct vxlan_sock { 
struct vxlan_net {

	struct list_head  vxlan_list;

	struct hlist_head sock_list[PORT_HASH_SIZE];

	spinlock_t	  sock_lock;

};



struct vxlan_rdst {
@@ -101,7 +104,8 @@ struct vxlan_rdst { 
	__be16			 remote_port;

	u32			 remote_vni;

	u32			 remote_ifindex;

	struct vxlan_rdst	*remote_next;

	struct list_head	 list;

	struct rcu_head		 rcu;

};



/* Forwarding table entry */
@@ -110,7 +114,7 @@ struct vxlan_fdb { 
	struct rcu_head	  rcu;

	unsigned long	  updated;	/* jiffies */

	unsigned long	  used;

	struct vxlan_rdst remote;

	struct list_head  remotes;

	u16		  state;	/* see ndm_state */

	u8		  flags;	/* see ndm_flags */

	u8		  eth_addr[ETH_ALEN];
@@ -131,6 +135,9 @@ struct vxlan_dev { 
	__u8		  ttl;

	u32		  flags;	/* VXLAN_F_* below */



	struct work_struct sock_work;

	struct work_struct igmp_work;



	unsigned long	  age_interval;

	struct timer_list age_timer;

	spinlock_t	  hash_lock;
@@ -148,6 +155,9 @@ struct vxlan_dev { 


/* salt for hash table */

static u32 vxlan_salt __read_mostly;

static struct workqueue_struct *vxlan_wq;



static void vxlan_sock_work(struct work_struct *work);



/* Virtual Network hash table head */

static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id)
@@ -163,6 +173,14 @@ static inline struct hlist_head *vs_head(struct net *net, __be16 port) 
	return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];

}



/* First remote destination for a forwarding entry.

 * Guaranteed to be non-NULL because remotes are never deleted.

 */

static inline struct vxlan_rdst *first_remote(struct vxlan_fdb *fdb)

{

	return list_first_or_null_rcu(&fdb->remotes, struct vxlan_rdst, list);

}



/* Find VXLAN socket based on network namespace and UDP port */

static struct vxlan_sock *vxlan_find_port(struct net *net, __be16 port)

{
@@ -235,7 +253,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, 
	    nla_put_be16(skb, NDA_PORT, rdst->remote_port))

		goto nla_put_failure;

	if (rdst->remote_vni != vxlan->default_dst.remote_vni &&

	    nla_put_be32(skb, NDA_VNI, rdst->remote_vni))

	    nla_put_u32(skb, NDA_VNI, rdst->remote_vni))

		goto nla_put_failure;

	if (rdst->remote_ifindex &&

	    nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
@@ -268,7 +286,7 @@ static inline size_t vxlan_nlmsg_size(void) 
}



static void vxlan_fdb_notify(struct vxlan_dev *vxlan,

			     const struct vxlan_fdb *fdb, int type)

			     struct vxlan_fdb *fdb, int type)

{

	struct net *net = dev_net(vxlan->dev);

	struct sk_buff *skb;
@@ -278,7 +296,7 @@ static void vxlan_fdb_notify(struct vxlan_dev *vxlan, 
	if (skb == NULL)

		goto errout;



	err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, &fdb->remote);

	err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, first_remote(fdb));

	if (err < 0) {

		/* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */

		WARN_ON(err == -EMSGSIZE);
@@ -296,22 +314,27 @@ static void vxlan_fdb_notify(struct vxlan_dev *vxlan, 
static void vxlan_ip_miss(struct net_device *dev, __be32 ipa)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_fdb f;

	struct vxlan_fdb f = {

		.state = NUD_STALE,

	};

	struct vxlan_rdst remote = {

		.remote_ip = ipa, /* goes to NDA_DST */

		.remote_vni = VXLAN_N_VID,

	};



	memset(&f, 0, sizeof f);

	f.state = NUD_STALE;

	f.remote.remote_ip = ipa; /* goes to NDA_DST */

	f.remote.remote_vni = VXLAN_N_VID;

	INIT_LIST_HEAD(&f.remotes);

	list_add_rcu(&remote.list, &f.remotes);



	vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH);

}



static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])

{

	struct vxlan_fdb	f;

	struct vxlan_fdb f = {

		.state = NUD_STALE,

	};



	memset(&f, 0, sizeof f);

	f.state = NUD_STALE;

	INIT_LIST_HEAD(&f.remotes);

	memcpy(f.eth_addr, eth_addr, ETH_ALEN);



	vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH);
@@ -366,21 +389,34 @@ static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, 
	return f;

}



/* Add/update destinations for multicast */

static int vxlan_fdb_append(struct vxlan_fdb *f,

			    __be32 ip, __be16 port, __u32 vni, __u32 ifindex)

/* caller should hold vxlan->hash_lock */

static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,

					      __be32 ip, __be16 port,

					      __u32 vni, __u32 ifindex)

{

	struct vxlan_rdst *rd_prev, *rd;

	struct vxlan_rdst *rd;



	rd_prev = NULL;

	for (rd = &f->remote; rd; rd = rd->remote_next) {

	list_for_each_entry(rd, &f->remotes, list) {

		if (rd->remote_ip == ip &&

		    rd->remote_port == port &&

		    rd->remote_vni == vni &&

		    rd->remote_ifindex == ifindex)

			return 0;

		rd_prev = rd;

			return rd;

	}



	return NULL;

}



/* Add/update destinations for multicast */

static int vxlan_fdb_append(struct vxlan_fdb *f,

			    __be32 ip, __be16 port, __u32 vni, __u32 ifindex)

{

	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;
@@ -388,8 +424,9 @@ static int vxlan_fdb_append(struct vxlan_fdb *f, 
	rd->remote_port = port;

	rd->remote_vni = vni;

	rd->remote_ifindex = ifindex;

	rd->remote_next = NULL;

	rd_prev->remote_next = rd;



	list_add_tail_rcu(&rd->list, &f->remotes);



	return 1;

}
@@ -421,7 +458,8 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan, 
			notify = 1;

		}

		if ((flags & NLM_F_APPEND) &&

		    is_multicast_ether_addr(f->eth_addr)) {

		    (is_multicast_ether_addr(f->eth_addr) ||

		     is_zero_ether_addr(f->eth_addr))) {

			int rc = vxlan_fdb_append(f, ip, port, vni, ifindex);



			if (rc < 0)
@@ -441,16 +479,14 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan, 
			return -ENOMEM;



		notify = 1;

		f->remote.remote_ip = ip;

		f->remote.remote_port = port;

		f->remote.remote_vni = vni;

		f->remote.remote_ifindex = ifindex;

		f->remote.remote_next = NULL;

		f->state = state;

		f->flags = ndm_flags;

		f->updated = f->used = jiffies;

		INIT_LIST_HEAD(&f->remotes);

		memcpy(f->eth_addr, mac, ETH_ALEN);



		vxlan_fdb_append(f, ip, port, vni, ifindex);



		++vxlan->addrcnt;

		hlist_add_head_rcu(&f->hlist,

				   vxlan_fdb_head(vxlan, mac));
@@ -462,16 +498,19 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan, 
	return 0;

}



static void vxlan_fdb_free_rdst(struct rcu_head *head)

{

	struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu);

	kfree(rd);

}



static void vxlan_fdb_free(struct rcu_head *head)

{

	struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);

	struct vxlan_rdst *rd, *nd;



	while (f->remote.remote_next) {

		struct vxlan_rdst *rd = f->remote.remote_next;



		f->remote.remote_next = rd->remote_next;

	list_for_each_entry_safe(rd, nd, &f->remotes, list)

		kfree(rd);

	}

	kfree(f);

}
@@ -487,58 +526,77 @@ static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) 
	call_rcu(&f->rcu, vxlan_fdb_free);

}



/* 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 flags)

static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,

			   __be32 *ip, __be16 *port, u32 *vni, u32 *ifindex)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct net *net = dev_net(vxlan->dev);

	__be32 ip;

	__be16 port;

	u32 vni, ifindex;

	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[NDA_DST] == NULL)

		return -EINVAL;



	if (tb[NDA_DST]) {

		if (nla_len(tb[NDA_DST]) != sizeof(__be32))

			return -EAFNOSUPPORT;



	ip = nla_get_be32(tb[NDA_DST]);

		*ip = nla_get_be32(tb[NDA_DST]);

	} else {

		*ip = htonl(INADDR_ANY);

	}



	if (tb[NDA_PORT]) {

		if (nla_len(tb[NDA_PORT]) != sizeof(__be16))

			return -EINVAL;

		port = nla_get_be16(tb[NDA_PORT]);

	} else

		port = vxlan->dst_port;

		*port = nla_get_be16(tb[NDA_PORT]);

	} else {

		*port = vxlan->dst_port;

	}



	if (tb[NDA_VNI]) {

		if (nla_len(tb[NDA_VNI]) != sizeof(u32))

			return -EINVAL;

		vni = nla_get_u32(tb[NDA_VNI]);

	} else

		vni = vxlan->default_dst.remote_vni;

		*vni = nla_get_u32(tb[NDA_VNI]);

	} else {

		*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);

		*ifindex = nla_get_u32(tb[NDA_IFINDEX]);

		tdev = dev_get_by_index(net, *ifindex);

		if (!tdev)

			return -EADDRNOTAVAIL;

		dev_put(tdev);

	} else

		ifindex = 0;

	} else {

		*ifindex = 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 flags)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	/* struct net *net = dev_net(vxlan->dev); */

	__be32 ip;

	__be16 port;

	u32 vni, ifindex;

	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[NDA_DST] == NULL)

		return -EINVAL;



	err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);

	if (err)

		return err;



	spin_lock_bh(&vxlan->hash_lock);

	err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags,
@@ -555,14 +613,43 @@ static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 
{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_fdb *f;

	int err = -ENOENT;

	struct vxlan_rdst *rd = NULL;

	__be32 ip;

	__be16 port;

	u32 vni, ifindex;

	int err;



	err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);

	if (err)

		return err;



	err = -ENOENT;



	spin_lock_bh(&vxlan->hash_lock);

	f = vxlan_find_mac(vxlan, addr);

	if (f) {

		vxlan_fdb_destroy(vxlan, f);

	if (!f)

		goto out;



	if (ip != htonl(INADDR_ANY)) {

		rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);

		if (!rd)

			goto out;

	}



	err = 0;



	/* 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)) {

		list_del_rcu(&rd->list);

		call_rcu(&rd->rcu, vxlan_fdb_free_rdst);

		goto out;

	}



	vxlan_fdb_destroy(vxlan, f);



out:

	spin_unlock_bh(&vxlan->hash_lock);



	return err;
@@ -581,23 +668,24 @@ static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 


		hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {

			struct vxlan_rdst *rd;

			for (rd = &f->remote; rd; rd = rd->remote_next) {



			if (idx < cb->args[0])

				goto skip;



			list_for_each_entry_rcu(rd, &f->remotes, list) {

				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)

					break;

					goto out;

			}

skip:

			++idx;

		}

	}

	}



out:

	return idx;

}
@@ -613,7 +701,9 @@ static bool vxlan_snoop(struct net_device *dev, 


	f = vxlan_find_mac(vxlan, src_mac);

	if (likely(f)) {

		if (likely(f->remote.remote_ip == src_ip))

		struct vxlan_rdst *rdst = first_remote(f);



		if (likely(rdst->remote_ip == src_ip))

			return false;



		/* Don't migrate static entries, drop packets */
@@ -623,10 +713,11 @@ static bool vxlan_snoop(struct net_device *dev, 
		if (net_ratelimit())

			netdev_info(dev,

				    "%pM migrated from %pI4 to %pI4\n",

				    src_mac, &f->remote.remote_ip, &src_ip);

				    src_mac, &rdst->remote_ip, &src_ip);



		f->remote.remote_ip = src_ip;

		rdst->remote_ip = src_ip;

		f->updated = jiffies;

		vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH);

	} else {

		/* learned new entry */

		spin_lock(&vxlan->hash_lock);
@@ -647,76 +738,61 @@ static bool vxlan_snoop(struct net_device *dev, 




/* See if multicast group is already in use by other ID */

static bool vxlan_group_used(struct vxlan_net *vn,

			     const struct vxlan_dev *this)

static bool vxlan_group_used(struct vxlan_net *vn, __be32 remote_ip)

{

	struct vxlan_dev *vxlan;



	list_for_each_entry(vxlan, &vn->vxlan_list, next) {

		if (vxlan == this)

			continue;



		if (!netif_running(vxlan->dev))

			continue;



		if (vxlan->default_dst.remote_ip == this->default_dst.remote_ip)

		if (vxlan->default_dst.remote_ip == remote_ip)

			return true;

	}



	return false;

}



/* kernel equivalent to IP_ADD_MEMBERSHIP */

static int vxlan_join_group(struct net_device *dev)

static void vxlan_sock_hold(struct vxlan_sock *vs)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);

	struct sock *sk = vxlan->vn_sock->sock->sk;

	struct ip_mreqn mreq = {

		.imr_multiaddr.s_addr	= vxlan->default_dst.remote_ip,

		.imr_ifindex		= vxlan->default_dst.remote_ifindex,

	};

	int err;

	atomic_inc(&vs->refcnt);

}



	/* Already a member of group */

	if (vxlan_group_used(vn, vxlan))

		return 0;

static void vxlan_sock_release(struct vxlan_net *vn, struct vxlan_sock *vs)

{

	if (!atomic_dec_and_test(&vs->refcnt))

		return;



	/* Need to drop RTNL to call multicast join */

	rtnl_unlock();

	lock_sock(sk);

	err = ip_mc_join_group(sk, &mreq);

	release_sock(sk);

	rtnl_lock();

	spin_lock(&vn->sock_lock);

	hlist_del_rcu(&vs->hlist);

	spin_unlock(&vn->sock_lock);



	return err;

	queue_work(vxlan_wq, &vs->del_work);

}





/* kernel equivalent to IP_DROP_MEMBERSHIP */

static int vxlan_leave_group(struct net_device *dev)

/* Callback to update multicast group membership.

 * Scheduled when vxlan goes up/down.

 */

static void vxlan_igmp_work(struct work_struct *work)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);

	int err = 0;

	struct sock *sk = vxlan->vn_sock->sock->sk;

	struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_work);

	struct vxlan_net *vn = net_generic(dev_net(vxlan->dev), vxlan_net_id);

	struct vxlan_sock *vs = vxlan->vn_sock;

	struct sock *sk = vs->sock->sk;

	struct ip_mreqn mreq = {

		.imr_multiaddr.s_addr	= vxlan->default_dst.remote_ip,

		.imr_ifindex		= vxlan->default_dst.remote_ifindex,

	};



	/* Only leave group when last vxlan is done. */

	if (vxlan_group_used(vn, vxlan))

		return 0;



	/* Need to drop RTNL to call multicast leave */

	rtnl_unlock();

	lock_sock(sk);

	err = ip_mc_leave_group(sk, &mreq);

	if (vxlan_group_used(vn, vxlan->default_dst.remote_ip))

		ip_mc_join_group(sk, &mreq);

	else

		ip_mc_leave_group(sk, &mreq);

	release_sock(sk);

	rtnl_lock();



	return err;

	vxlan_sock_release(vn, vs);

	dev_put(vxlan->dev);

}



/* Callback from net/ipv4/udp.c to receive packets */
@@ -873,7 +949,7 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb) 
		}



		f = vxlan_find_mac(vxlan, n->ha);

		if (f && f->remote.remote_ip == htonl(INADDR_ANY)) {

		if (f && first_remote(f)->remote_ip == htonl(INADDR_ANY)) {

			/* bridge-local neighbor */

			neigh_release(n);

			goto out;
@@ -1015,7 +1091,7 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, 
	}

}



static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,

static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,

			   struct vxlan_rdst *rdst, bool did_rsc)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);
@@ -1039,7 +1115,7 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
		if (did_rsc) {

			/* short-circuited back to local bridge */

			vxlan_encap_bypass(skb, vxlan, vxlan);

			return NETDEV_TX_OK;

			return;

		}

		goto drop;

	}
@@ -1095,7 +1171,7 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
		if (!dst_vxlan)

			goto tx_error;

		vxlan_encap_bypass(skb, vxlan, dst_vxlan);

		return NETDEV_TX_OK;

		return;

	}

	vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));

	vxh->vx_flags = htonl(VXLAN_FLAGS);
@@ -1123,7 +1199,7 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
			    IPPROTO_UDP, tos, ttl, df);

	iptunnel_xmit_stats(err, &dev->stats, dev->tstats);



	return NETDEV_TX_OK;

	return;



drop:

	dev->stats.tx_dropped++;
@@ -1133,7 +1209,6 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
	dev->stats.tx_errors++;

tx_free:

	dev_kfree_skb(skb);

	return NETDEV_TX_OK;

}



/* Transmit local packets over Vxlan
@@ -1147,9 +1222,8 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) 
	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct ethhdr *eth;

	bool did_rsc = false;

	struct vxlan_rdst *rdst0, *rdst;

	struct vxlan_rdst *rdst;

	struct vxlan_fdb *f;

	int rc1, rc;



	skb_reset_mac_header(skb);

	eth = eth_hdr(skb);
@@ -1168,33 +1242,28 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) 
	}



	if (f == NULL) {

		rdst0 = &vxlan->default_dst;



		if (rdst0->remote_ip == htonl(INADDR_ANY) &&

		    (vxlan->flags & VXLAN_F_L2MISS) &&

		f = vxlan_find_mac(vxlan, all_zeros_mac);

		if (f == NULL) {

			if ((vxlan->flags & VXLAN_F_L2MISS) &&

			    !is_multicast_ether_addr(eth->h_dest))

				vxlan_fdb_miss(vxlan, eth->h_dest);

	} else

		rdst0 = &f->remote;



	rc = NETDEV_TX_OK;

			dev->stats.tx_dropped++;

			dev_kfree_skb(skb);

			return NETDEV_TX_OK;

		}

	}



	/* if there are multiple destinations, send copies */

	for (rdst = rdst0->remote_next; rdst; rdst = rdst->remote_next) {

	list_for_each_entry_rcu(rdst, &f->remotes, list) {

		struct sk_buff *skb1;



		skb1 = skb_clone(skb, GFP_ATOMIC);

		if (skb1) {

			rc1 = vxlan_xmit_one(skb1, dev, rdst, did_rsc);

			if (rc == NETDEV_TX_OK)

				rc = rc1;

		}

		if (skb1)

			vxlan_xmit_one(skb1, dev, rdst, did_rsc);

	}



	rc1 = vxlan_xmit_one(skb, dev, rdst0, did_rsc);

	if (rc == NETDEV_TX_OK)

		rc = rc1;

	return rc;

	dev_kfree_skb(skb);

	return NETDEV_TX_OK;

}



/* Walk the forwarding table and purge stale entries */
@@ -1237,23 +1306,70 @@ static void vxlan_cleanup(unsigned long arg) 
/* Setup stats when device is created */

static int vxlan_init(struct net_device *dev)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);

	struct vxlan_sock *vs;

	__u32 vni = vxlan->default_dst.remote_vni;



	dev->tstats = alloc_percpu(struct pcpu_tstats);

	if (!dev->tstats)

		return -ENOMEM;



	spin_lock(&vn->sock_lock);

	vs = vxlan_find_port(dev_net(dev), vxlan->dst_port);

	if (vs) {

		/* If we have a socket with same port already, reuse it */

		atomic_inc(&vs->refcnt);

		vxlan->vn_sock = vs;

		hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));

	} else {

		/* otherwise make new socket outside of RTNL */

		dev_hold(dev);

		queue_work(vxlan_wq, &vxlan->sock_work);

	}

	spin_unlock(&vn->sock_lock);



	return 0;

}



static void vxlan_fdb_delete_defualt(struct vxlan_dev *vxlan)

{

	struct vxlan_fdb *f;



	spin_lock_bh(&vxlan->hash_lock);

	f = __vxlan_find_mac(vxlan, all_zeros_mac);

	if (f)

		vxlan_fdb_destroy(vxlan, f);

	spin_unlock_bh(&vxlan->hash_lock);

}



static void vxlan_uninit(struct net_device *dev)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);

	struct vxlan_sock *vs = vxlan->vn_sock;



	vxlan_fdb_delete_defualt(vxlan);



	if (vs)

		vxlan_sock_release(vn, vs);

	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 err;

	struct vxlan_sock *vs = vxlan->vn_sock;



	/* socket hasn't been created */

	if (!vs)

		return -ENOTCONN;



	if (IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip))) {

		err = vxlan_join_group(dev);

		if (err)

			return err;

		vxlan_sock_hold(vs);

		dev_hold(dev);

		queue_work(vxlan_wq, &vxlan->igmp_work);

	}



	if (vxlan->age_interval)
@@ -1273,6 +1389,8 @@ static void vxlan_flush(struct vxlan_dev *vxlan) 
		hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {

			struct vxlan_fdb *f

				= container_of(p, struct vxlan_fdb, hlist);

			/* the all_zeros_mac entry is deleted at vxlan_uninit */

			if (!is_zero_ether_addr(f->eth_addr))

				vxlan_fdb_destroy(vxlan, f);

		}

	}
@@ -1283,9 +1401,13 @@ static void vxlan_flush(struct vxlan_dev *vxlan) 
static int vxlan_stop(struct net_device *dev)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_sock *vs = vxlan->vn_sock;



	if (IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip)))

		vxlan_leave_group(dev);

	if (vs && IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip))) {

		vxlan_sock_hold(vs);

		dev_hold(dev);

		queue_work(vxlan_wq, &vxlan->igmp_work);

	}



	del_timer_sync(&vxlan->age_timer);
@@ -1301,6 +1423,7 @@ static void vxlan_set_multicast_list(struct net_device *dev) 


static const struct net_device_ops vxlan_netdev_ops = {

	.ndo_init		= vxlan_init,

	.ndo_uninit		= vxlan_uninit,

	.ndo_open		= vxlan_open,

	.ndo_stop		= vxlan_stop,

	.ndo_start_xmit		= vxlan_xmit,
@@ -1319,12 +1442,6 @@ static struct device_type vxlan_type = { 
	.name = "vxlan",

};



static void vxlan_free(struct net_device *dev)

{

	free_percpu(dev->tstats);

	free_netdev(dev);

}



/* Initialize the device structure. */

static void vxlan_setup(struct net_device *dev)

{
@@ -1337,7 +1454,7 @@ static void vxlan_setup(struct net_device *dev) 
	dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM;



	dev->netdev_ops = &vxlan_netdev_ops;

	dev->destructor = vxlan_free;

	dev->destructor = free_netdev;

	SET_NETDEV_DEVTYPE(dev, &vxlan_type);



	dev->tx_queue_len = 0;
@@ -1354,6 +1471,8 @@ static void vxlan_setup(struct net_device *dev) 


	INIT_LIST_HEAD(&vxlan->next);

	spin_lock_init(&vxlan->hash_lock);

	INIT_WORK(&vxlan->igmp_work, vxlan_igmp_work);

	INIT_WORK(&vxlan->sock_work, vxlan_sock_work);



	init_timer_deferrable(&vxlan->age_timer);

	vxlan->age_timer.function = vxlan_cleanup;
@@ -1445,7 +1564,6 @@ static void vxlan_del_work(struct work_struct *work) 
	kfree_rcu(vs, rcu);

}



/* Create new listen socket if needed */

static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port)

{

	struct vxlan_sock *vs;
@@ -1453,6 +1571,7 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port) 
	struct sockaddr_in vxlan_addr = {

		.sin_family = AF_INET,

		.sin_addr.s_addr = htonl(INADDR_ANY),

		.sin_port = port,

	};

	int rc;

	unsigned int h;
@@ -1478,8 +1597,6 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port) 
	sk = vs->sock->sk;

	sk_change_net(sk, net);



	vxlan_addr.sin_port = port;



	rc = kernel_bind(vs->sock, (struct sockaddr *) &vxlan_addr,

			 sizeof(vxlan_addr));

	if (rc < 0) {
@@ -1497,18 +1614,57 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port) 
	udp_sk(sk)->encap_type = 1;

	udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv;

	udp_encap_enable();

	atomic_set(&vs->refcnt, 1);



	vs->refcnt = 1;

	return vs;

}



/* Scheduled at device creation to bind to a socket */

static void vxlan_sock_work(struct work_struct *work)

{

	struct vxlan_dev *vxlan

		= container_of(work, struct vxlan_dev, sock_work);

	struct net_device *dev = vxlan->dev;

	struct net *net = dev_net(dev);

	__u32 vni = vxlan->default_dst.remote_vni;

	__be16 port = vxlan->dst_port;

	struct vxlan_net *vn = net_generic(net, vxlan_net_id);

	struct vxlan_sock *nvs, *ovs;



	nvs = vxlan_socket_create(net, port);

	if (IS_ERR(nvs)) {

		netdev_err(vxlan->dev, "Can not create UDP socket, %ld\n",

			   PTR_ERR(nvs));

		goto out;

	}



	spin_lock(&vn->sock_lock);

	/* Look again to see if can reuse socket */

	ovs = vxlan_find_port(net, port);

	if (ovs) {

		atomic_inc(&ovs->refcnt);

		vxlan->vn_sock = ovs;

		hlist_add_head_rcu(&vxlan->hlist, vni_head(ovs, vni));

		spin_unlock(&vn->sock_lock);



		sk_release_kernel(nvs->sock->sk);

		kfree(nvs);

	} else {

		vxlan->vn_sock = nvs;

		hlist_add_head_rcu(&nvs->hlist, vs_head(net, port));

		hlist_add_head_rcu(&vxlan->hlist, vni_head(nvs, vni));

		spin_unlock(&vn->sock_lock);

	}

out:

	dev_put(dev);

}



static int vxlan_newlink(struct net *net, struct net_device *dev,

			 struct nlattr *tb[], struct nlattr *data[])

{

	struct vxlan_net *vn = net_generic(net, vxlan_net_id);

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_rdst *dst = &vxlan->default_dst;

	struct vxlan_sock *vs;

	__u32 vni;

	int err;
@@ -1586,36 +1742,25 @@ static int vxlan_newlink(struct net *net, struct net_device *dev, 
		return -EEXIST;

	}



	vs = vxlan_find_port(net, vxlan->dst_port);

	if (vs)

		++vs->refcnt;

	else {

		/* Drop lock because socket create acquires RTNL lock */

		rtnl_unlock();

		vs = vxlan_socket_create(net, vxlan->dst_port);

		rtnl_lock();

		if (IS_ERR(vs))

			return PTR_ERR(vs);



		hlist_add_head_rcu(&vs->hlist, vs_head(net, vxlan->dst_port));

	}

	vxlan->vn_sock = vs;



	SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops);



	/* create an fdb entry for default destination */

	err = vxlan_fdb_create(vxlan, all_zeros_mac,

			       vxlan->default_dst.remote_ip,

			       NUD_REACHABLE|NUD_PERMANENT,

			       NLM_F_EXCL|NLM_F_CREATE,

			       vxlan->dst_port, vxlan->default_dst.remote_vni,

			       vxlan->default_dst.remote_ifindex, NTF_SELF);

	if (err)

		return err;



	err = register_netdevice(dev);

	if (err) {

		if (--vs->refcnt == 0) {

			rtnl_unlock();

			sk_release_kernel(vs->sock->sk);

			kfree(vs);

			rtnl_lock();

		}

		vxlan_fdb_delete_defualt(vxlan);

		return err;

	}



	list_add(&vxlan->next, &vn->vxlan_list);

	hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));



	return 0;

}
@@ -1623,16 +1768,10 @@ static int vxlan_newlink(struct net *net, struct net_device *dev, 
static void vxlan_dellink(struct net_device *dev, struct list_head *head)

{

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct vxlan_sock *vs = vxlan->vn_sock;



	hlist_del_rcu(&vxlan->hlist);

	list_del(&vxlan->next);

	unregister_netdevice_queue(dev, head);



	if (--vs->refcnt == 0) {

		hlist_del_rcu(&vs->hlist);

		schedule_work(&vs->del_work);

	}

}



static size_t vxlan_get_size(const struct net_device *dev)
@@ -1721,6 +1860,7 @@ static __net_init int vxlan_init_net(struct net *net) 
	unsigned int h;



	INIT_LIST_HEAD(&vn->vxlan_list);

	spin_lock_init(&vn->sock_lock);



	for (h = 0; h < PORT_HASH_SIZE; ++h)

		INIT_HLIST_HEAD(&vn->sock_list[h]);
@@ -1750,6 +1890,10 @@ static int __init vxlan_init_module(void) 
{

	int rc;



	vxlan_wq = alloc_workqueue("vxlan", 0, 0);

	if (!vxlan_wq)

		return -ENOMEM;



	get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));



	rc = register_pernet_device(&vxlan_net_ops);
@@ -1765,14 +1909,16 @@ static int __init vxlan_init_module(void) 
out2:

	unregister_pernet_device(&vxlan_net_ops);

out1:

	destroy_workqueue(vxlan_wq);

	return rc;

}

late_initcall(vxlan_init_module);



static void __exit vxlan_cleanup_module(void)

{

	rtnl_link_unregister(&vxlan_link_ops);

	unregister_pernet_device(&vxlan_net_ops);

	rtnl_link_unregister(&vxlan_link_ops);

	destroy_workqueue(vxlan_wq);

	rcu_barrier();

}

module_exit(vxlan_cleanup_module);

net/bridge/br_fdb.c

+5 −0
Original line number Diff line number Diff line
@@ -707,6 +707,11 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 
		}

	}



	if (is_zero_ether_addr(addr)) {

		pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n");

		return -EINVAL;

	}



	p = br_port_get_rtnl(dev);

	if (p == NULL) {

		pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n",

net/core/rtnetlink.c

+0 −8

File changed.

Preview size limit exceeded, changes collapsed.