Merge tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "Core:

   - Implement the Device Memory TCP transmit path, allowing zero-copy
     data transmission on top of TCP from e.g. GPU memory to the wire.

   - Move all the IPv6 routing tables management outside the RTNL scope,
     under its own lock and RCU. The route control path is now 3x times
     faster.

   - Convert queue related netlink ops to instance lock, reducing again
     the scope of the RTNL lock. This improves the control plane
     scalability.

   - Refactor the software crc32c implementation, removing unneeded
     abstraction layers and improving significantly the related
     micro-benchmarks.

   - Optimize the GRO engine for UDP-tunneled traffic, for a 10%
     performance improvement in related stream tests.

   - Cover more per-CPU storage with local nested BH locking; this is a
     prep work to remove the current per-CPU lock in local_bh_disable()
     on PREMPT_RT.

   - Introduce and use nlmsg_payload helper, combining buffer bounds
     verification with accessing payload carried by netlink messages.

  Netfilter:

   - Rewrite the procfs conntrack table implementation, improving
     considerably the dump performance. A lot of user-space tools still
     use this interface.

   - Implement support for wildcard netdevice in netdev basechain and
     flowtables.

   - Integrate conntrack information into nft trace infrastructure.

   - Export set count and backend name to userspace, for better
     introspection.

  BPF:

   - BPF qdisc support: BPF-qdisc can be implemented with BPF struct_ops
     programs and can be controlled in similar way to traditional qdiscs
     using the "tc qdisc" command.

   - Refactor the UDP socket iterator, addressing long standing issues
     WRT duplicate hits or missed sockets.

  Protocols:

   - Improve TCP receive buffer auto-tuning and increase the default
     upper bound for the receive buffer; overall this improves the
     single flow maximum thoughput on 200Gbs link by over 60%.

   - Add AFS GSSAPI security class to AF_RXRPC; it provides transport
     security for connections to the AFS fileserver and VL server.

   - Improve TCP multipath routing, so that the sources address always
     matches the nexthop device.

   - Introduce SO_PASSRIGHTS for AF_UNIX, to allow disabling SCM_RIGHTS,
     and thus preventing DoS caused by passing around problematic FDs.

   - Retire DCCP socket. DCCP only receives updates for bugs, and major
     distros disable it by default. Its removal allows for better
     organisation of TCP fields to reduce the number of cache lines hit
     in the fast path.

   - Extend TCP drop-reason support to cover PAWS checks.

  Driver API:

   - Reorganize PTP ioctl flag support to require an explicit opt-in for
     the drivers, avoiding the problem of drivers not rejecting new
     unsupported flags.

   - Converted several device drivers to timestamping APIs.

   - Introduce per-PHY ethtool dump helpers, improving the support for
     dump operations targeting PHYs.

  Tests and tooling:

   - Add support for classic netlink in user space C codegen, so that
     ynl-c can now read, create and modify links, routes addresses and
     qdisc layer configuration.

   - Add ynl sub-types for binary attributes, allowing ynl-c to output
     known struct instead of raw binary data, clarifying the classic
     netlink output.

   - Extend MPTCP selftests to improve the code-coverage.

   - Add tests for XDP tail adjustment in AF_XDP.

  New hardware / drivers:

   - OpenVPN virtual driver: offload OpenVPN data channels processing to
     the kernel-space, increasing the data transfer throughput WRT the
     user-space implementation.

   - Renesas glue driver for the gigabit ethernet RZ/V2H(P) SoC.

   - Broadcom asp-v3.0 ethernet driver.

   - AMD Renoir ethernet device.

   - ReakTek MT9888 2.5G ethernet PHY driver.

   - Aeonsemi 10G C45 PHYs driver.

  Drivers:

   - Ethernet high-speed NICs:
       - nVidia/Mellanox (mlx5):
           - refactor the steering table handling to significantly
             reduce the amount of memory used
           - add support for complex matches in H/W flow steering
           - improve flow streeing error handling
           - convert to netdev instance locking
       - Intel (100G, ice, igb, ixgbe, idpf):
           - ice: add switchdev support for LLDP traffic over VF
           - ixgbe: add firmware manipulation and regions devlink support
           - igb: introduce support for frame transmission premption
           - igb: adds persistent NAPI configuration
           - idpf: introduce RDMA support
           - idpf: add initial PTP support
       - Meta (fbnic):
           - extend hardware stats coverage
           - add devlink dev flash support
       - Broadcom (bnxt):
           - add support for RX-side device memory TCP
       - Wangxun (txgbe):
           - implement support for udp tunnel offload
           - complete PTP and SRIOV support for AML 25G/10G devices

   - Ethernet NICs embedded and virtual:
       - Google (gve):
           - add device memory TCP TX support
       - Amazon (ena):
           - support persistent per-NAPI config
       - Airoha:
           - add H/W support for L2 traffic offload
           - add per flow stats for flow offloading
       - RealTek (rtl8211): add support for WoL magic packet
       - Synopsys (stmmac):
           - dwmac-socfpga 1000BaseX support
           - add Loongson-2K3000 support
           - introduce support for hardware-accelerated VLAN stripping
       - Broadcom (bcmgenet):
           - expose more H/W stats
       - Freescale (enetc, dpaa2-eth):
           - enetc: add MAC filter, VLAN filter RSS and loopback support
           - dpaa2-eth: convert to H/W timestamping APIs
       - vxlan: convert FDB table to rhashtable, for better scalabilty
       - veth: apply qdisc backpressure on full ring to reduce TX drops

   - Ethernet switches:
       - Microchip (kzZ88x3): add ETS scheduler support

   - Ethernet PHYs:
       - RealTek (rtl8211):
           - add support for WoL magic packet
           - add support for PHY LEDs

   - CAN:
       - Adds RZ/G3E CANFD support to the rcar_canfd driver.
       - Preparatory work for CAN-XL support.
       - Add self-tests framework with support for CAN physical interfaces.

   - WiFi:
       - mac80211:
           - scan improvements with multi-link operation (MLO)
       - Qualcomm (ath12k):
           - enable AHB support for IPQ5332
           - add monitor interface support to QCN9274
           - add multi-link operation support to WCN7850
           - add 802.11d scan offload support to WCN7850
           - monitor mode for WCN7850, better 6 GHz regulatory
       - Qualcomm (ath11k):
           - restore hibernation support
       - MediaTek (mt76):
           - WiFi-7 improvements
           - implement support for mt7990
       - Intel (iwlwifi):
           - enhanced multi-link single-radio (EMLSR) support on 5 GHz links
           - rework device configuration
       - RealTek (rtw88):
           - improve throughput for RTL8814AU
       - RealTek (rtw89):
           - add multi-link operation support
           - STA/P2P concurrency improvements
           - support different SAR configs by antenna

   - Bluetooth:
       - introduce HCI Driver protocol
       - btintel_pcie: do not generate coredump for diagnostic events
       - btusb: add HCI Drv commands for configuring altsetting
       - btusb: add RTL8851BE device 0x0bda:0xb850
       - btusb: add new VID/PID 13d3/3584 for MT7922
       - btusb: add new VID/PID 13d3/3630 and 13d3/3613 for MT7925
       - btnxpuart: implement host-wakeup feature"

* tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1611 commits)
  selftests/bpf: Fix bpf selftest build warning
  selftests: netfilter: Fix skip of wildcard interface test
  net: phy: mscc: Stop clearing the the UDPv4 checksum for L2 frames
  net: openvswitch: Fix the dead loop of MPLS parse
  calipso: Don't call calipso functions for AF_INET sk.
  selftests/tc-testing: Add a test for HFSC eltree double add with reentrant enqueue behaviour on netem
  net_sched: hfsc: Address reentrant enqueue adding class to eltree twice
  octeontx2-pf: QOS: Refactor TC_HTB_LEAF_DEL_LAST callback
  octeontx2-pf: QOS: Perform cache sync on send queue teardown
  net: mana: Add support for Multi Vports on Bare metal
  net: devmem: ncdevmem: remove unused variable
  net: devmem: ksft: upgrade rx test to send 1K data
  net: devmem: ksft: add 5 tuple FS support
  net: devmem: ksft: add exit_wait to make rx test pass
  net: devmem: ksft: add ipv4 support
  net: devmem: preserve sockc_err
  page_pool: fix ugly page_pool formatting
  net: devmem: move list_add to net_devmem_bind_dmabuf.
  selftests: netfilter: nft_queue.sh: include file transfer duration in log message
  net: phy: mscc: Fix memory leak when using one step timestamping
  ...

1 files changed, 241 insertions, 319 deletions

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 9ccc3f09f71b..a56d7239b127 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -15,6 +15,7 @@
 #include <linux/igmp.h>
 #include <linux/if_ether.h>
 #include <linux/ethtool.h>
+#include <linux/rhashtable.h>
 #include <net/arp.h>
 #include <net/ndisc.h>
 #include <net/gro.h>
@@ -63,8 +64,12 @@ static int vxlan_sock_add(struct vxlan_dev *vxlan);
 
 static void vxlan_vs_del_dev(struct vxlan_dev *vxlan);
 
-/* salt for hash table */
-static u32 vxlan_salt __read_mostly;
+static const struct rhashtable_params vxlan_fdb_rht_params = {
+	.head_offset = offsetof(struct vxlan_fdb, rhnode),
+	.key_offset = offsetof(struct vxlan_fdb, key),
+	.key_len = sizeof(struct vxlan_fdb_key),
+	.automatic_shrinking = true,
+};
 
 static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
 {
@@ -186,7 +191,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
 		} else if (nh) {
 			ndm->ndm_family = nh_family;
 		}
-		send_eth = !is_zero_ether_addr(fdb->eth_addr);
+		send_eth = !is_zero_ether_addr(fdb->key.eth_addr);
 	} else
 		ndm->ndm_family	= AF_BRIDGE;
 	ndm->ndm_state = fdb->state;
@@ -201,7 +206,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
 			peernet2id(dev_net(vxlan->dev), vxlan->net)))
 		goto nla_put_failure;
 
-	if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
+	if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->key.eth_addr))
 		goto nla_put_failure;
 	if (nh) {
 		if (nla_put_u32(skb, NDA_NH_ID, nh_id))
@@ -223,9 +228,9 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
 			goto nla_put_failure;
 	}
 
-	if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->vni &&
+	if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->key.vni &&
 	    nla_put_u32(skb, NDA_SRC_VNI,
-			be32_to_cpu(fdb->vni)))
+			be32_to_cpu(fdb->key.vni)))
 		goto nla_put_failure;
 
 	ci.ndm_used	 = jiffies_to_clock_t(now - READ_ONCE(fdb->used));
@@ -293,8 +298,8 @@ static void vxlan_fdb_switchdev_notifier_info(const struct vxlan_dev *vxlan,
 	fdb_info->remote_port = rd->remote_port;
 	fdb_info->remote_vni = rd->remote_vni;
 	fdb_info->remote_ifindex = rd->remote_ifindex;
-	memcpy(fdb_info->eth_addr, fdb->eth_addr, ETH_ALEN);
-	fdb_info->vni = fdb->vni;
+	memcpy(fdb_info->eth_addr, fdb->key.eth_addr, ETH_ALEN);
+	fdb_info->vni = fdb->key.vni;
 	fdb_info->offloaded = rd->offloaded;
 	fdb_info->added_by_user = fdb->flags & NTF_VXLAN_ADDED_BY_USER;
 }
@@ -366,67 +371,42 @@ static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
 	};
 	struct vxlan_rdst remote = { };
 
-	memcpy(f.eth_addr, eth_addr, ETH_ALEN);
+	memcpy(f.key.eth_addr, eth_addr, ETH_ALEN);
 
 	vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true, NULL);
 }
 
-/* Hash Ethernet address */
-static u32 eth_hash(const unsigned char *addr)
-{
-	u64 value = get_unaligned((u64 *)addr);
-
-	/* only want 6 bytes */
-#ifdef __BIG_ENDIAN
-	value >>= 16;
-#else
-	value <<= 16;
-#endif
-	return hash_64(value, FDB_HASH_BITS);
-}
-
-u32 eth_vni_hash(const unsigned char *addr, __be32 vni)
+/* Look up Ethernet address in forwarding table */
+static struct vxlan_fdb *vxlan_find_mac_rcu(struct vxlan_dev *vxlan,
+					    const u8 *mac, __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);
-}
+	struct vxlan_fdb_key key;
 
-u32 fdb_head_index(struct vxlan_dev *vxlan, const u8 *mac, __be32 vni)
-{
-	if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)
-		return eth_vni_hash(mac, vni);
+	memset(&key, 0, sizeof(key));
+	memcpy(key.eth_addr, mac, sizeof(key.eth_addr));
+	if (!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA))
+		key.vni = vxlan->default_dst.remote_vni;
 	else
-		return eth_hash(mac);
-}
+		key.vni = vni;
 
-/* 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)];
+	return rhashtable_lookup(&vxlan->fdb_hash_tbl, &key,
+				 vxlan_fdb_rht_params);
 }
 
-/* Look up Ethernet address in forwarding table */
-static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
-					  const u8 *mac, __be32 vni)
+static struct vxlan_fdb *vxlan_find_mac_tx(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;
-			}
-		}
+	f = vxlan_find_mac_rcu(vxlan, mac, vni);
+	if (f) {
+		unsigned long now = jiffies;
+
+		if (READ_ONCE(f->used) != now)
+			WRITE_ONCE(f->used, now);
 	}
 
-	return NULL;
+	return f;
 }
 
 static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
@@ -434,13 +414,11 @@ static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
 {
 	struct vxlan_fdb *f;
 
-	f = __vxlan_find_mac(vxlan, mac, vni);
-	if (f) {
-		unsigned long now = jiffies;
+	lockdep_assert_held_once(&vxlan->hash_lock);
 
-		if (READ_ONCE(f->used) != now)
-			WRITE_ONCE(f->used, now);
-	}
+	rcu_read_lock();
+	f = vxlan_find_mac_rcu(vxlan, mac, vni);
+	rcu_read_unlock();
 
 	return f;
 }
@@ -480,7 +458,7 @@ int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
 
 	rcu_read_lock();
 
-	f = __vxlan_find_mac(vxlan, eth_addr, vni);
+	f = vxlan_find_mac_rcu(vxlan, eth_addr, vni);
 	if (!f) {
 		rc = -ENOENT;
 		goto out;
@@ -517,32 +495,28 @@ int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
 	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_lock_bh(&vxlan->hash_lock);
+	hlist_for_each_entry(f, &vxlan->fdb_list, fdb_node) {
+		if (f->key.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]);
 	}
+	spin_unlock_bh(&vxlan->hash_lock);
 	return 0;
 
 unlock:
-	spin_unlock_bh(&vxlan->hash_lock[h]);
+	spin_unlock_bh(&vxlan->hash_lock);
 	return rc;
 }
 EXPORT_SYMBOL_GPL(vxlan_fdb_replay);
@@ -552,20 +526,19 @@ 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]);
+	spin_lock_bh(&vxlan->hash_lock);
+	hlist_for_each_entry(f, &vxlan->fdb_list, fdb_node) {
+		if (f->key.vni == vni) {
+			list_for_each_entry(rdst, &f->remotes, list)
+				rdst->offloaded = false;
+		}
 	}
+	spin_unlock_bh(&vxlan->hash_lock);
 
 }
 EXPORT_SYMBOL_GPL(vxlan_fdb_clear_offload);
@@ -610,10 +583,10 @@ static int vxlan_fdb_append(struct vxlan_fdb *f,
 	if (rd == NULL)
 		return -ENOMEM;
 
-	if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
-		kfree(rd);
-		return -ENOMEM;
-	}
+	/* The driver can work correctly without a dst cache, so do not treat
+	 * dst cache initialization errors as fatal.
+	 */
+	dst_cache_init(&rd->dst_cache, GFP_ATOMIC | __GFP_NOWARN);
 
 	rd->remote_ip = *ip;
 	rd->remote_port = port;
@@ -803,27 +776,20 @@ static struct vxlan_fdb *vxlan_fdb_alloc(struct vxlan_dev *vxlan, const u8 *mac,
 	f = kmalloc(sizeof(*f), GFP_ATOMIC);
 	if (!f)
 		return NULL;
+	memset(&f->key, 0, sizeof(f->key));
 	f->state = state;
 	f->flags = ndm_flags;
 	f->updated = f->used = jiffies;
-	f->vni = src_vni;
+	f->key.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);
+	memcpy(f->key.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)
 {
@@ -913,10 +879,27 @@ int vxlan_fdb_create(struct vxlan_dev *vxlan,
 	if (rc < 0)
 		goto errout;
 
+	rc = rhashtable_lookup_insert_fast(&vxlan->fdb_hash_tbl, &f->rhnode,
+					   vxlan_fdb_rht_params);
+	if (rc)
+		goto destroy_remote;
+
+	++vxlan->addrcnt;
+	hlist_add_head_rcu(&f->fdb_node, &vxlan->fdb_list);
+
 	*fdb = f;
 
 	return 0;
 
+destroy_remote:
+	if (rcu_access_pointer(f->nh)) {
+		list_del_rcu(&f->nh_list);
+		nexthop_put(rtnl_dereference(f->nh));
+	} else {
+		list_del(&rd->list);
+		dst_cache_destroy(&rd->dst_cache);
+		kfree(rd);
+	}
 errout:
 	kfree(f);
 	return rc;
@@ -953,7 +936,7 @@ static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
 {
 	struct vxlan_rdst *rd;
 
-	netdev_dbg(vxlan->dev, "delete %pM\n", f->eth_addr);
+	netdev_dbg(vxlan->dev, "delete %pM\n", f->key.eth_addr);
 
 	--vxlan->addrcnt;
 	if (do_notify) {
@@ -966,7 +949,9 @@ static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
 						 swdev_notify, NULL);
 	}
 
-	hlist_del_rcu(&f->hlist);
+	hlist_del_init_rcu(&f->fdb_node);
+	rhashtable_remove_fast(&vxlan->fdb_hash_tbl, &f->rhnode,
+			       vxlan_fdb_rht_params);
 	list_del_rcu(&f->nh_list);
 	call_rcu(&f->rcu, vxlan_fdb_free);
 }
@@ -1024,8 +1009,8 @@ static int vxlan_fdb_update_existing(struct vxlan_dev *vxlan,
 
 	if ((flags & NLM_F_REPLACE)) {
 		/* Only change unicasts */
-		if (!(is_multicast_ether_addr(f->eth_addr) ||
-		      is_zero_ether_addr(f->eth_addr))) {
+		if (!(is_multicast_ether_addr(f->key.eth_addr) ||
+		      is_zero_ether_addr(f->key.eth_addr))) {
 			if (nhid) {
 				rc = vxlan_fdb_nh_update(vxlan, f, nhid, extack);
 				if (rc < 0)
@@ -1041,8 +1026,8 @@ static int vxlan_fdb_update_existing(struct vxlan_dev *vxlan,
 		}
 	}
 	if ((flags & NLM_F_APPEND) &&
-	    (is_multicast_ether_addr(f->eth_addr) ||
-	     is_zero_ether_addr(f->eth_addr))) {
+	    (is_multicast_ether_addr(f->key.eth_addr) ||
+	     is_zero_ether_addr(f->key.eth_addr))) {
 		rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
 
 		if (rc < 0)
@@ -1101,7 +1086,6 @@ static int vxlan_fdb_update_create(struct vxlan_dev *vxlan,
 	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)
@@ -1125,7 +1109,7 @@ int vxlan_fdb_update(struct vxlan_dev *vxlan,
 {
 	struct vxlan_fdb *f;
 
-	f = __vxlan_find_mac(vxlan, mac, src_vni);
+	f = vxlan_find_mac(vxlan, mac, src_vni);
 	if (f) {
 		if (flags & NLM_F_EXCL) {
 			netdev_dbg(vxlan->dev,
@@ -1253,7 +1237,6 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 	__be16 port;
 	__be32 src_vni, vni;
 	u32 ifindex, nhid;
-	u32 hash_index;
 	int err;
 
 	if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
@@ -1273,13 +1256,12 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 	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]);
+	spin_lock_bh(&vxlan->hash_lock);
 	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]);
+	spin_unlock_bh(&vxlan->hash_lock);
 
 	if (!err)
 		*notified = true;
@@ -1296,7 +1278,7 @@ int __vxlan_fdb_delete(struct vxlan_dev *vxlan,
 	struct vxlan_fdb *f;
 	int err = -ENOENT;
 
-	f = __vxlan_find_mac(vxlan, addr, src_vni);
+	f = vxlan_find_mac(vxlan, addr, src_vni);
 	if (!f)
 		return err;
 
@@ -1330,7 +1312,6 @@ static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 	union vxlan_addr ip;
 	__be32 src_vni, vni;
 	u32 ifindex, nhid;
-	u32 hash_index;
 	__be16 port;
 	int err;
 
@@ -1339,11 +1320,10 @@ static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 	if (err)
 		return err;
 
-	hash_index = fdb_head_index(vxlan, addr, src_vni);
-	spin_lock_bh(&vxlan->hash_lock[hash_index]);
+	spin_lock_bh(&vxlan->hash_lock);
 	err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex,
 				 true);
-	spin_unlock_bh(&vxlan->hash_lock[hash_index]);
+	spin_unlock_bh(&vxlan->hash_lock);
 
 	if (!err)
 		*notified = true;
@@ -1358,52 +1338,46 @@ static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 {
 	struct ndo_fdb_dump_context *ctx = (void *)cb->ctx;
 	struct vxlan_dev *vxlan = netdev_priv(dev);
-	unsigned int h;
+	struct vxlan_fdb *f;
 	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 < ctx->fdb_idx)
-					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;
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(f, &vxlan->fdb_list, fdb_node) {
+		struct vxlan_rdst *rd;
+
+		if (rcu_access_pointer(f->nh)) {
+			if (*idx < ctx->fdb_idx)
+				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 < ctx->fdb_idx)
-					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;
+		list_for_each_entry_rcu(rd, &f->remotes, list) {
+			if (*idx < ctx->fdb_idx)
+				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();
 	}
+	rcu_read_unlock();
 out:
 	return err;
 }
@@ -1427,7 +1401,7 @@ static int vxlan_fdb_get(struct sk_buff *skb,
 
 	rcu_read_lock();
 
-	f = __vxlan_find_mac(vxlan, addr, vni);
+	f = vxlan_find_mac_rcu(vxlan, addr, vni);
 	if (!f) {
 		NL_SET_ERR_MSG(extack, "Fdb entry not found");
 		err = -ENOENT;
@@ -1463,7 +1437,7 @@ static enum skb_drop_reason vxlan_snoop(struct net_device *dev,
 		ifindex = src_ifindex;
 #endif
 
-	f = __vxlan_find_mac(vxlan, src_mac, vni);
+	f = vxlan_find_mac_rcu(vxlan, src_mac, vni);
 	if (likely(f)) {
 		struct vxlan_rdst *rdst = first_remote_rcu(f);
 		unsigned long now = jiffies;
@@ -1491,10 +1465,8 @@ static enum skb_drop_reason vxlan_snoop(struct net_device *dev,
 		rdst->remote_ip = *src_ip;
 		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]);
+		spin_lock(&vxlan->hash_lock);
 
 		/* close off race between vxlan_flush and incoming packets */
 		if (netif_running(dev))
@@ -1505,7 +1477,7 @@ static enum skb_drop_reason vxlan_snoop(struct net_device *dev,
 					 vni,
 					 vxlan->default_dst.remote_vni,
 					 ifindex, NTF_SELF, 0, true, NULL);
-		spin_unlock(&vxlan->hash_lock[hash_index]);
+		spin_unlock(&vxlan->hash_lock);
 	}
 
 	return SKB_NOT_DROPPED_YET;
@@ -1916,12 +1888,15 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
 			goto out;
 		}
 
-		f = vxlan_find_mac(vxlan, n->ha, vni);
+		rcu_read_lock();
+		f = vxlan_find_mac_tx(vxlan, n->ha, vni);
 		if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
 			/* bridge-local neighbor */
 			neigh_release(n);
+			rcu_read_unlock();
 			goto out;
 		}
+		rcu_read_unlock();
 
 		reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
 				n->ha, sha);
@@ -2080,7 +2055,7 @@ static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
 			goto out;
 		}
 
-		f = vxlan_find_mac(vxlan, n->ha, vni);
+		f = vxlan_find_mac_tx(vxlan, n->ha, vni);
 		if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
 			/* bridge-local neighbor */
 			neigh_release(n);
@@ -2648,14 +2623,10 @@ static void vxlan_xmit_nh(struct sk_buff *skb, struct net_device *dev,
 	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();
+	if (!nh)
 		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);
@@ -2782,7 +2753,8 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 	}
 
 	eth = eth_hdr(skb);
-	f = vxlan_find_mac(vxlan, eth->h_dest, vni);
+	rcu_read_lock();
+	f = vxlan_find_mac_tx(vxlan, eth->h_dest, vni);
 	did_rsc = false;
 
 	if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) &&
@@ -2790,11 +2762,11 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 	     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);
+			f = vxlan_find_mac_tx(vxlan, eth->h_dest, vni);
 	}
 
 	if (f == NULL) {
-		f = vxlan_find_mac(vxlan, all_zeros_mac, vni);
+		f = vxlan_find_mac_tx(vxlan, all_zeros_mac, vni);
 		if (f == NULL) {
 			if ((vxlan->cfg.flags & VXLAN_F_L2MISS) &&
 			    !is_multicast_ether_addr(eth->h_dest))
@@ -2804,7 +2776,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 			vxlan_vnifilter_count(vxlan, vni, NULL,
 					      VXLAN_VNI_STATS_TX_DROPS, 0);
 			kfree_skb_reason(skb, SKB_DROP_REASON_NO_TX_TARGET);
-			return NETDEV_TX_OK;
+			goto out;
 		}
 	}
 
@@ -2829,6 +2801,8 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 			kfree_skb_reason(skb, SKB_DROP_REASON_NO_TX_TARGET);
 	}
 
+out:
+	rcu_read_unlock();
 	return NETDEV_TX_OK;
 }
 
@@ -2837,38 +2811,36 @@ 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;
+	struct vxlan_fdb *f;
 
 	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;
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(f, &vxlan->fdb_list, fdb_node) {
+		unsigned long timeout;
 
-			if (f->state & (NUD_PERMANENT | NUD_NOARP))
-				continue;
+		if (f->state & (NUD_PERMANENT | NUD_NOARP))
+			continue;
 
-			if (f->flags & NTF_EXT_LEARNED)
-				continue;
+		if (f->flags & NTF_EXT_LEARNED)
+			continue;
 
-			timeout = READ_ONCE(f->updated) + vxlan->cfg.age_interval * HZ;
-			if (time_before_eq(timeout, jiffies)) {
-				netdev_dbg(vxlan->dev,
-					   "garbage collect %pM\n",
-					   f->eth_addr);
+		timeout = READ_ONCE(f->updated) + vxlan->cfg.age_interval * HZ;
+		if (time_before_eq(timeout, jiffies)) {
+			spin_lock(&vxlan->hash_lock);
+			if (!hlist_unhashed(&f->fdb_node)) {
+				netdev_dbg(vxlan->dev, "garbage collect %pM\n",
+					   f->key.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);
+		} else if (time_before(timeout, next_timer)) {
+			next_timer = timeout;
 		}
-		spin_unlock(&vxlan->hash_lock[h]);
 	}
+	rcu_read_unlock();
 
 	mod_timer(&vxlan->age_timer, next_timer);
 }
@@ -2903,10 +2875,14 @@ static int vxlan_init(struct net_device *dev)
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	int err;
 
+	err = rhashtable_init(&vxlan->fdb_hash_tbl, &vxlan_fdb_rht_params);
+	if (err)
+		return err;
+
 	if (vxlan->cfg.flags & VXLAN_F_VNIFILTER) {
 		err = vxlan_vnigroup_init(vxlan);
 		if (err)
-			return err;
+			goto err_rhashtable_destroy;
 	}
 
 	err = gro_cells_init(&vxlan->gro_cells, dev);
@@ -2925,21 +2901,11 @@ err_gro_cells_destroy:
 err_vnigroup_uninit:
 	if (vxlan->cfg.flags & VXLAN_F_VNIFILTER)
 		vxlan_vnigroup_uninit(vxlan);
+err_rhashtable_destroy:
+	rhashtable_destroy(&vxlan->fdb_hash_tbl);
 	return err;
 }
 
-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);
@@ -2951,7 +2917,7 @@ static void vxlan_uninit(struct net_device *dev)
 
 	gro_cells_destroy(&vxlan->gro_cells);
 
-	vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
+	rhashtable_destroy(&vxlan->fdb_hash_tbl);
 }
 
 /* Start ageing timer and join group when device is brought up */
@@ -2992,7 +2958,8 @@ struct vxlan_fdb_flush_desc {
 static bool vxlan_fdb_is_default_entry(const struct vxlan_fdb *f,
 				       const struct vxlan_dev *vxlan)
 {
-	return is_zero_ether_addr(f->eth_addr) && f->vni == vxlan->cfg.vni;
+	return is_zero_ether_addr(f->key.eth_addr) &&
+	       f->key.vni == vxlan->cfg.vni;
 }
 
 static bool vxlan_fdb_nhid_matches(const struct vxlan_fdb *f, u32 nhid)
@@ -3015,7 +2982,7 @@ static bool vxlan_fdb_flush_matches(const struct vxlan_fdb *f,
 	if (desc->ignore_default_entry && vxlan_fdb_is_default_entry(f, vxlan))
 		return false;
 
-	if (desc->src_vni && f->vni != desc->src_vni)
+	if (desc->src_vni && f->key.vni != desc->src_vni)
 		return false;
 
 	if (desc->nhid && !vxlan_fdb_nhid_matches(f, desc->nhid))
@@ -3071,33 +3038,32 @@ static void vxlan_flush(struct vxlan_dev *vxlan,
 			const struct vxlan_fdb_flush_desc *desc)
 {
 	bool match_remotes = vxlan_fdb_flush_should_match_remotes(desc);
-	unsigned int h;
-
-	for (h = 0; h < FDB_HASH_SIZE; ++h) {
-		struct hlist_node *p, *n;
+	struct vxlan_fdb *f;
 
-		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);
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(f, &vxlan->fdb_list, fdb_node) {
+		if (!vxlan_fdb_flush_matches(f, vxlan, desc))
+			continue;
 
-			if (!vxlan_fdb_flush_matches(f, vxlan, desc))
-				continue;
+		spin_lock_bh(&vxlan->hash_lock);
+		if (hlist_unhashed(&f->fdb_node))
+			goto unlock;
 
-			if (match_remotes) {
-				bool destroy_fdb = false;
+		if (match_remotes) {
+			bool destroy_fdb = false;
 
-				vxlan_fdb_flush_match_remotes(f, vxlan, desc,
-							      &destroy_fdb);
+			vxlan_fdb_flush_match_remotes(f, vxlan, desc,
+						      &destroy_fdb);
 
-				if (!destroy_fdb)
-					continue;
-			}
-
-			vxlan_fdb_destroy(vxlan, f, true, true);
+			if (!destroy_fdb)
+				goto unlock;
 		}
-		spin_unlock_bh(&vxlan->hash_lock[h]);
+
+		vxlan_fdb_destroy(vxlan, f, true, true);
+unlock:
+		spin_unlock_bh(&vxlan->hash_lock);
 	}
+	rcu_read_unlock();
 }
 
 static const struct nla_policy vxlan_del_bulk_policy[NDA_MAX + 1] = {
@@ -3185,7 +3151,7 @@ static int vxlan_stop(struct net_device *dev)
 {
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	struct vxlan_fdb_flush_desc desc = {
-		/* Default entry is deleted at vxlan_uninit. */
+		/* Default entry is deleted at vxlan_dellink. */
 		.ignore_default_entry = true,
 		.state = 0,
 		.state_mask = NUD_PERMANENT | NUD_NOARP,
@@ -3348,7 +3314,6 @@ static void vxlan_offload_rx_ports(struct net_device *dev, bool push)
 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);
@@ -3375,15 +3340,13 @@ static void vxlan_setup(struct net_device *dev)
 
 	dev->pcpu_stat_type = NETDEV_PCPU_STAT_DSTATS;
 	INIT_LIST_HEAD(&vxlan->next);
+	spin_lock_init(&vxlan->hash_lock);
 
 	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]);
-	}
+	INIT_HLIST_HEAD(&vxlan->fdb_list);
 }
 
 static void vxlan_ether_setup(struct net_device *dev)
@@ -3960,8 +3923,6 @@ static int __vxlan_dev_create(struct net *net, struct net_device *dev,
 	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;
 
@@ -3972,72 +3933,54 @@ static int __vxlan_dev_create(struct net *net, struct net_device *dev,
 
 	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;
+		return err;
 
 	if (dst->remote_ifindex) {
 		remote_dev = __dev_get_by_index(net, dst->remote_ifindex);
 		if (!remote_dev) {
 			err = -ENODEV;
-			goto errout;
+			goto unregister;
 		}
 
 		err = netdev_upper_dev_link(remote_dev, dev, extack);
 		if (err)
-			goto errout;
+			goto unregister;
+
+		dst->remote_dev = remote_dev;
 	}
 
 	err = rtnl_configure_link(dev, NULL, 0, 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;
-		}
+	/* create an fdb entry for a valid default destination */
+	if (!vxlan_addr_any(&dst->remote_ip)) {
+		spin_lock_bh(&vxlan->hash_lock);
+		err = vxlan_fdb_update(vxlan, all_zeros_mac,
+				       &dst->remote_ip,
+				       NUD_REACHABLE | NUD_PERMANENT,
+				       NLM_F_EXCL | NLM_F_CREATE,
+				       vxlan->cfg.dst_port,
+				       dst->remote_vni,
+				       dst->remote_vni,
+				       dst->remote_ifindex,
+				       NTF_SELF, 0, true, extack);
+		spin_unlock_bh(&vxlan->hash_lock);
+		if (err)
+			goto unlink;
 	}
 
 	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);
+	unregister_netdevice(dev);
 	return err;
 }
 
@@ -4454,9 +4397,7 @@ static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
 
 	/* handle default dst entry */
 	if (rem_ip_changed) {
-		u32 hash_index = fdb_head_index(vxlan, all_zeros_mac, conf.vni);
-
-		spin_lock_bh(&vxlan->hash_lock[hash_index]);
+		spin_lock_bh(&vxlan->hash_lock);
 		if (!vxlan_addr_any(&conf.remote_ip)) {
 			err = vxlan_fdb_update(vxlan, all_zeros_mac,
 					       &conf.remote_ip,
@@ -4467,7 +4408,7 @@ static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
 					       conf.remote_ifindex,
 					       NTF_SELF, 0, true, extack);
 			if (err) {
-				spin_unlock_bh(&vxlan->hash_lock[hash_index]);
+				spin_unlock_bh(&vxlan->hash_lock);
 				netdev_adjacent_change_abort(dst->remote_dev,
 							     lowerdev, dev);
 				return err;
@@ -4481,7 +4422,7 @@ static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
 					   dst->remote_vni,
 					   dst->remote_ifindex,
 					   true);
-		spin_unlock_bh(&vxlan->hash_lock[hash_index]);
+		spin_unlock_bh(&vxlan->hash_lock);
 
 		/* If vni filtering device, also update fdb entries of
 		 * all vnis that were using default remote ip
@@ -4518,10 +4459,7 @@ static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
 static void vxlan_dellink(struct net_device *dev, struct list_head *head)
 {
 	struct vxlan_dev *vxlan = netdev_priv(dev);
-	struct vxlan_fdb_flush_desc desc = {
-		/* Default entry is deleted at vxlan_uninit. */
-		.ignore_default_entry = true,
-	};
+	struct vxlan_fdb_flush_desc desc = {};
 
 	vxlan_flush(vxlan, &desc);
 
@@ -4784,13 +4722,10 @@ vxlan_fdb_offloaded_set(struct net_device *dev,
 	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]);
+	spin_lock_bh(&vxlan->hash_lock);
 
-	f = __vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni);
+	f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni);
 	if (!f)
 		goto out;
 
@@ -4804,7 +4739,7 @@ vxlan_fdb_offloaded_set(struct net_device *dev,
 	rdst->offloaded = fdb_info->offloaded;
 
 out:
-	spin_unlock_bh(&vxlan->hash_lock[hash_index]);
+	spin_unlock_bh(&vxlan->hash_lock);
 }
 
 static int
@@ -4813,13 +4748,11 @@ vxlan_fdb_external_learn_add(struct net_device *dev,
 {
 	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]);
+	spin_lock_bh(&vxlan->hash_lock);
 	err = vxlan_fdb_update(vxlan, fdb_info->eth_addr, &fdb_info->remote_ip,
 			       NUD_REACHABLE,
 			       NLM_F_CREATE | NLM_F_REPLACE,
@@ -4829,7 +4762,7 @@ vxlan_fdb_external_learn_add(struct net_device *dev,
 			       fdb_info->remote_ifindex,
 			       NTF_USE | NTF_SELF | NTF_EXT_LEARNED,
 			       0, false, extack);
-	spin_unlock_bh(&vxlan->hash_lock[hash_index]);
+	spin_unlock_bh(&vxlan->hash_lock);
 
 	return err;
 }
@@ -4840,13 +4773,11 @@ vxlan_fdb_external_learn_del(struct net_device *dev,
 {
 	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]);
+	spin_lock_bh(&vxlan->hash_lock);
 
-	f = __vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni);
+	f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni);
 	if (!f)
 		err = -ENOENT;
 	else if (f->flags & NTF_EXT_LEARNED)
@@ -4858,7 +4789,7 @@ vxlan_fdb_external_learn_del(struct net_device *dev,
 					 fdb_info->remote_ifindex,
 					 false);
 
-	spin_unlock_bh(&vxlan->hash_lock[hash_index]);
+	spin_unlock_bh(&vxlan->hash_lock);
 
 	return err;
 }
@@ -4907,18 +4838,15 @@ 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))
+		spin_lock_bh(&vxlan->hash_lock);
+		if (!hlist_unhashed(&fdb->fdb_node))
 			vxlan_fdb_destroy(vxlan, fdb, false, false);
-		spin_unlock_bh(&vxlan->hash_lock[hash_index]);
+		spin_unlock_bh(&vxlan->hash_lock);
 	}
 	rcu_read_unlock();
 }
@@ -4966,19 +4894,15 @@ static void __net_exit vxlan_destroy_tunnels(struct vxlan_net *vn,
 		vxlan_dellink(vxlan->dev, dev_to_kill);
 }
 
-static void __net_exit vxlan_exit_batch_rtnl(struct list_head *net_list,
-					     struct list_head *dev_to_kill)
+static void __net_exit vxlan_exit_rtnl(struct net *net,
+				       struct list_head *dev_to_kill)
 {
-	struct net *net;
-
-	ASSERT_RTNL();
-	list_for_each_entry(net, net_list, exit_list) {
-		struct vxlan_net *vn = net_generic(net, vxlan_net_id);
+	struct vxlan_net *vn = net_generic(net, vxlan_net_id);
 
-		__unregister_nexthop_notifier(net, &vn->nexthop_notifier_block);
+	ASSERT_RTNL_NET(net);
 
-		vxlan_destroy_tunnels(vn, dev_to_kill);
-	}
+	__unregister_nexthop_notifier(net, &vn->nexthop_notifier_block);
+	vxlan_destroy_tunnels(vn, dev_to_kill);
 }
 
 static void __net_exit vxlan_exit_net(struct net *net)
@@ -4992,7 +4916,7 @@ static void __net_exit vxlan_exit_net(struct net *net)
 
 static struct pernet_operations vxlan_net_ops = {
 	.init = vxlan_init_net,
-	.exit_batch_rtnl = vxlan_exit_batch_rtnl,
+	.exit_rtnl = vxlan_exit_rtnl,
 	.exit = vxlan_exit_net,
 	.id   = &vxlan_net_id,
 	.size = sizeof(struct vxlan_net),
@@ -5002,8 +4926,6 @@ 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;