1 files changed, 0 insertions, 1147 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
deleted file mode 100644
index 2758aba47a2f..000000000000
--- a/net/batman-adv/soft-interface.c
+++ /dev/null
@@ -1,1147 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) B.A.T.M.A.N. contributors:
- *
- * Marek Lindner, Simon Wunderlich
- */
-
-#include "soft-interface.h"
-#include "main.h"
-
-#include <linux/atomic.h>
-#include <linux/byteorder/generic.h>
-#include <linux/cache.h>
-#include <linux/compiler.h>
-#include <linux/container_of.h>
-#include <linux/cpumask.h>
-#include <linux/errno.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/gfp.h>
-#include <linux/if_ether.h>
-#include <linux/if_vlan.h>
-#include <linux/jiffies.h>
-#include <linux/kref.h>
-#include <linux/list.h>
-#include <linux/lockdep.h>
-#include <linux/netdevice.h>
-#include <linux/netlink.h>
-#include <linux/percpu.h>
-#include <linux/random.h>
-#include <linux/rculist.h>
-#include <linux/rcupdate.h>
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include <linux/socket.h>
-#include <linux/spinlock.h>
-#include <linux/stddef.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <net/net_namespace.h>
-#include <net/netlink.h>
-#include <uapi/linux/batadv_packet.h>
-#include <uapi/linux/batman_adv.h>
-
-#include "bat_algo.h"
-#include "bridge_loop_avoidance.h"
-#include "distributed-arp-table.h"
-#include "gateway_client.h"
-#include "hard-interface.h"
-#include "multicast.h"
-#include "network-coding.h"
-#include "send.h"
-#include "translation-table.h"
-
-/**
- * batadv_skb_head_push() - Increase header size and move (push) head pointer
- * @skb: packet buffer which should be modified
- * @len: number of bytes to add
- *
- * Return: 0 on success or negative error number in case of failure
- */
-int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
-{
-	int result;
-
-	/* TODO: We must check if we can release all references to non-payload
-	 * data using __skb_header_release in our skbs to allow skb_cow_header
-	 * to work optimally. This means that those skbs are not allowed to read
-	 * or write any data which is before the current position of skb->data
-	 * after that call and thus allow other skbs with the same data buffer
-	 * to write freely in that area.
-	 */
-	result = skb_cow_head(skb, len);
-	if (result < 0)
-		return result;
-
-	skb_push(skb, len);
-	return 0;
-}
-
-static int batadv_interface_open(struct net_device *dev)
-{
-	netif_start_queue(dev);
-	return 0;
-}
-
-static int batadv_interface_release(struct net_device *dev)
-{
-	netif_stop_queue(dev);
-	return 0;
-}
-
-/**
- * batadv_sum_counter() - Sum the cpu-local counters for index 'idx'
- * @bat_priv: the bat priv with all the soft interface information
- * @idx: index of counter to sum up
- *
- * Return: sum of all cpu-local counters
- */
-static u64 batadv_sum_counter(struct batadv_priv *bat_priv,  size_t idx)
-{
-	u64 *counters, sum = 0;
-	int cpu;
-
-	for_each_possible_cpu(cpu) {
-		counters = per_cpu_ptr(bat_priv->bat_counters, cpu);
-		sum += counters[idx];
-	}
-
-	return sum;
-}
-
-static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
-{
-	struct batadv_priv *bat_priv = netdev_priv(dev);
-	struct net_device_stats *stats = &dev->stats;
-
-	stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
-	stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
-	stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
-	stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
-	stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
-	return stats;
-}
-
-static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
-{
-	struct batadv_priv *bat_priv = netdev_priv(dev);
-	struct batadv_softif_vlan *vlan;
-	struct sockaddr *addr = p;
-	u8 old_addr[ETH_ALEN];
-
-	if (!is_valid_ether_addr(addr->sa_data))
-		return -EADDRNOTAVAIL;
-
-	ether_addr_copy(old_addr, dev->dev_addr);
-	eth_hw_addr_set(dev, addr->sa_data);
-
-	/* only modify transtable if it has been initialized before */
-	if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
-		return 0;
-
-	rcu_read_lock();
-	hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
-		batadv_tt_local_remove(bat_priv, old_addr, vlan->vid,
-				       "mac address changed", false);
-		batadv_tt_local_add(dev, addr->sa_data, vlan->vid,
-				    BATADV_NULL_IFINDEX, BATADV_NO_MARK);
-	}
-	rcu_read_unlock();
-
-	return 0;
-}
-
-static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
-{
-	struct batadv_priv *bat_priv = netdev_priv(dev);
-
-	/* check ranges */
-	if (new_mtu < ETH_MIN_MTU || new_mtu > batadv_hardif_min_mtu(dev))
-		return -EINVAL;
-
-	WRITE_ONCE(dev->mtu, new_mtu);
-	bat_priv->mtu_set_by_user = new_mtu;
-
-	return 0;
-}
-
-/**
- * batadv_interface_set_rx_mode() - set the rx mode of a device
- * @dev: registered network device to modify
- *
- * We do not actually need to set any rx filters for the virtual batman
- * soft interface. However a dummy handler enables a user to set static
- * multicast listeners for instance.
- */
-static void batadv_interface_set_rx_mode(struct net_device *dev)
-{
-}
-
-static netdev_tx_t batadv_interface_tx(struct sk_buff *skb,
-				       struct net_device *soft_iface)
-{
-	struct ethhdr *ethhdr;
-	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
-	struct batadv_hard_iface *primary_if = NULL;
-	struct batadv_bcast_packet *bcast_packet;
-	static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
-					      0x00, 0x00};
-	static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
-					       0x00, 0x00};
-	enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO;
-	u8 *dst_hint = NULL, chaddr[ETH_ALEN];
-	struct vlan_ethhdr *vhdr;
-	unsigned int header_len = 0;
-	int data_len = skb->len, ret;
-	unsigned long brd_delay = 0;
-	bool do_bcast = false, client_added;
-	unsigned short vid;
-	u32 seqno;
-	int gw_mode;
-	enum batadv_forw_mode forw_mode = BATADV_FORW_BCAST;
-	int mcast_is_routable = 0;
-	int network_offset = ETH_HLEN;
-	__be16 proto;
-
-	if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
-		goto dropped;
-
-	/* reset control block to avoid left overs from previous users */
-	memset(skb->cb, 0, sizeof(struct batadv_skb_cb));
-
-	netif_trans_update(soft_iface);
-	vid = batadv_get_vid(skb, 0);
-
-	skb_reset_mac_header(skb);
-	ethhdr = eth_hdr(skb);
-
-	proto = ethhdr->h_proto;
-
-	switch (ntohs(proto)) {
-	case ETH_P_8021Q:
-		if (!pskb_may_pull(skb, sizeof(*vhdr)))
-			goto dropped;
-		vhdr = vlan_eth_hdr(skb);
-		proto = vhdr->h_vlan_encapsulated_proto;
-
-		/* drop batman-in-batman packets to prevent loops */
-		if (proto != htons(ETH_P_BATMAN)) {
-			network_offset += VLAN_HLEN;
-			break;
-		}
-
-		fallthrough;
-	case ETH_P_BATMAN:
-		goto dropped;
-	}
-
-	skb_set_network_header(skb, network_offset);
-
-	if (batadv_bla_tx(bat_priv, skb, vid))
-		goto dropped;
-
-	/* skb->data might have been reallocated by batadv_bla_tx() */
-	ethhdr = eth_hdr(skb);
-
-	/* Register the client MAC in the transtable */
-	if (!is_multicast_ether_addr(ethhdr->h_source) &&
-	    !batadv_bla_is_loopdetect_mac(ethhdr->h_source)) {
-		client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
-						   vid, skb->skb_iif,
-						   skb->mark);
-		if (!client_added)
-			goto dropped;
-	}
-
-	/* Snoop address candidates from DHCPACKs for early DAT filling */
-	batadv_dat_snoop_outgoing_dhcp_ack(bat_priv, skb, proto, vid);
-
-	/* don't accept stp packets. STP does not help in meshes.
-	 * better use the bridge loop avoidance ...
-	 *
-	 * The same goes for ECTP sent at least by some Cisco Switches,
-	 * it might confuse the mesh when used with bridge loop avoidance.
-	 */
-	if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
-		goto dropped;
-
-	if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
-		goto dropped;
-
-	gw_mode = atomic_read(&bat_priv->gw.mode);
-	if (is_multicast_ether_addr(ethhdr->h_dest)) {
-		/* if gw mode is off, broadcast every packet */
-		if (gw_mode == BATADV_GW_MODE_OFF) {
-			do_bcast = true;
-			goto send;
-		}
-
-		dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len,
-							chaddr);
-		/* skb->data may have been modified by
-		 * batadv_gw_dhcp_recipient_get()
-		 */
-		ethhdr = eth_hdr(skb);
-		/* if gw_mode is on, broadcast any non-DHCP message.
-		 * All the DHCP packets are going to be sent as unicast
-		 */
-		if (dhcp_rcp == BATADV_DHCP_NO) {
-			do_bcast = true;
-			goto send;
-		}
-
-		if (dhcp_rcp == BATADV_DHCP_TO_CLIENT)
-			dst_hint = chaddr;
-		else if ((gw_mode == BATADV_GW_MODE_SERVER) &&
-			 (dhcp_rcp == BATADV_DHCP_TO_SERVER))
-			/* gateways should not forward any DHCP message if
-			 * directed to a DHCP server
-			 */
-			goto dropped;
-
-send:
-		if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
-			forw_mode = batadv_mcast_forw_mode(bat_priv, skb, vid,
-							   &mcast_is_routable);
-			switch (forw_mode) {
-			case BATADV_FORW_BCAST:
-				break;
-			case BATADV_FORW_UCASTS:
-			case BATADV_FORW_MCAST:
-				do_bcast = false;
-				break;
-			case BATADV_FORW_NONE:
-				fallthrough;
-			default:
-				goto dropped;
-			}
-		}
-	}
-
-	batadv_skb_set_priority(skb, 0);
-
-	/* ethernet packet should be broadcasted */
-	if (do_bcast) {
-		primary_if = batadv_primary_if_get_selected(bat_priv);
-		if (!primary_if)
-			goto dropped;
-
-		/* in case of ARP request, we do not immediately broadcasti the
-		 * packet, instead we first wait for DAT to try to retrieve the
-		 * correct ARP entry
-		 */
-		if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
-			brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
-
-		if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
-			goto dropped;
-
-		bcast_packet = (struct batadv_bcast_packet *)skb->data;
-		bcast_packet->version = BATADV_COMPAT_VERSION;
-		bcast_packet->ttl = BATADV_TTL - 1;
-
-		/* batman packet type: broadcast */
-		bcast_packet->packet_type = BATADV_BCAST;
-		bcast_packet->reserved = 0;
-
-		/* hw address of first interface is the orig mac because only
-		 * this mac is known throughout the mesh
-		 */
-		ether_addr_copy(bcast_packet->orig,
-				primary_if->net_dev->dev_addr);
-
-		/* set broadcast sequence number */
-		seqno = atomic_inc_return(&bat_priv->bcast_seqno);
-		bcast_packet->seqno = htonl(seqno);
-
-		batadv_send_bcast_packet(bat_priv, skb, brd_delay, true);
-	/* unicast packet */
-	} else {
-		/* DHCP packets going to a server will use the GW feature */
-		if (dhcp_rcp == BATADV_DHCP_TO_SERVER) {
-			ret = batadv_gw_out_of_range(bat_priv, skb);
-			if (ret)
-				goto dropped;
-			ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
-		} else if (forw_mode == BATADV_FORW_UCASTS) {
-			ret = batadv_mcast_forw_send(bat_priv, skb, vid,
-						     mcast_is_routable);
-		} else if (forw_mode == BATADV_FORW_MCAST) {
-			ret = batadv_mcast_forw_mcsend(bat_priv, skb);
-		} else {
-			if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
-								  skb))
-				goto dropped;
-
-			batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
-
-			ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint,
-						     vid);
-		}
-		if (ret != NET_XMIT_SUCCESS)
-			goto dropped_freed;
-	}
-
-	batadv_inc_counter(bat_priv, BATADV_CNT_TX);
-	batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
-	goto end;
-
-dropped:
-	kfree_skb(skb);
-dropped_freed:
-	batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
-end:
-	batadv_hardif_put(primary_if);
-	return NETDEV_TX_OK;
-}
-
-/**
- * batadv_interface_rx() - receive ethernet frame on local batman-adv interface
- * @soft_iface: local interface which will receive the ethernet frame
- * @skb: ethernet frame for @soft_iface
- * @hdr_size: size of already parsed batman-adv header
- * @orig_node: originator from which the batman-adv packet was sent
- *
- * Sends an ethernet frame to the receive path of the local @soft_iface.
- * skb->data has still point to the batman-adv header with the size @hdr_size.
- * The caller has to have parsed this header already and made sure that at least
- * @hdr_size bytes are still available for pull in @skb.
- *
- * The packet may still get dropped. This can happen when the encapsulated
- * ethernet frame is invalid or contains again an batman-adv packet. Also
- * unicast packets will be dropped directly when it was sent between two
- * isolated clients.
- */
-void batadv_interface_rx(struct net_device *soft_iface,
-			 struct sk_buff *skb, int hdr_size,
-			 struct batadv_orig_node *orig_node)
-{
-	struct batadv_bcast_packet *batadv_bcast_packet;
-	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
-	struct vlan_ethhdr *vhdr;
-	struct ethhdr *ethhdr;
-	unsigned short vid;
-	int packet_type;
-
-	batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
-	packet_type = batadv_bcast_packet->packet_type;
-
-	skb_pull_rcsum(skb, hdr_size);
-	skb_reset_mac_header(skb);
-
-	/* clean the netfilter state now that the batman-adv header has been
-	 * removed
-	 */
-	nf_reset_ct(skb);
-
-	if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
-		goto dropped;
-
-	vid = batadv_get_vid(skb, 0);
-	ethhdr = eth_hdr(skb);
-
-	switch (ntohs(ethhdr->h_proto)) {
-	case ETH_P_8021Q:
-		if (!pskb_may_pull(skb, VLAN_ETH_HLEN))
-			goto dropped;
-
-		vhdr = skb_vlan_eth_hdr(skb);
-
-		/* drop batman-in-batman packets to prevent loops */
-		if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))
-			break;
-
-		fallthrough;
-	case ETH_P_BATMAN:
-		goto dropped;
-	}
-
-	/* skb->dev & skb->pkt_type are set here */
-	skb->protocol = eth_type_trans(skb, soft_iface);
-	skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
-
-	batadv_inc_counter(bat_priv, BATADV_CNT_RX);
-	batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
-			   skb->len + ETH_HLEN);
-
-	/* Let the bridge loop avoidance check the packet. If will
-	 * not handle it, we can safely push it up.
-	 */
-	if (batadv_bla_rx(bat_priv, skb, vid, packet_type))
-		goto out;
-
-	if (orig_node)
-		batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
-						     ethhdr->h_source, vid);
-
-	if (is_multicast_ether_addr(ethhdr->h_dest)) {
-		/* set the mark on broadcast packets if AP isolation is ON and
-		 * the packet is coming from an "isolated" client
-		 */
-		if (batadv_vlan_ap_isola_get(bat_priv, vid) &&
-		    batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,
-						 vid)) {
-			/* save bits in skb->mark not covered by the mask and
-			 * apply the mark on the rest
-			 */
-			skb->mark &= ~bat_priv->isolation_mark_mask;
-			skb->mark |= bat_priv->isolation_mark;
-		}
-	} else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,
-					 ethhdr->h_dest, vid)) {
-		goto dropped;
-	}
-
-	netif_rx(skb);
-	goto out;
-
-dropped:
-	kfree_skb(skb);
-out:
-	return;
-}
-
-/**
- * batadv_softif_vlan_release() - release vlan from lists and queue for free
- *  after rcu grace period
- * @ref: kref pointer of the vlan object
- */
-void batadv_softif_vlan_release(struct kref *ref)
-{
-	struct batadv_softif_vlan *vlan;
-
-	vlan = container_of(ref, struct batadv_softif_vlan, refcount);
-
-	spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock);
-	hlist_del_rcu(&vlan->list);
-	spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock);
-
-	kfree_rcu(vlan, rcu);
-}
-
-/**
- * batadv_softif_vlan_get() - get the vlan object for a specific vid
- * @bat_priv: the bat priv with all the soft interface information
- * @vid: the identifier of the vlan object to retrieve
- *
- * Return: the private data of the vlan matching the vid passed as argument or
- * NULL otherwise. The refcounter of the returned object is incremented by 1.
- */
-struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
-						  unsigned short vid)
-{
-	struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
-
-	rcu_read_lock();
-	hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
-		if (vlan_tmp->vid != vid)
-			continue;
-
-		if (!kref_get_unless_zero(&vlan_tmp->refcount))
-			continue;
-
-		vlan = vlan_tmp;
-		break;
-	}
-	rcu_read_unlock();
-
-	return vlan;
-}
-
-/**
- * batadv_softif_create_vlan() - allocate the needed resources for a new vlan
- * @bat_priv: the bat priv with all the soft interface information
- * @vid: the VLAN identifier
- *
- * Return: 0 on success, a negative error otherwise.
- */
-int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
-{
-	struct batadv_softif_vlan *vlan;
-
-	spin_lock_bh(&bat_priv->softif_vlan_list_lock);
-
-	vlan = batadv_softif_vlan_get(bat_priv, vid);
-	if (vlan) {
-		batadv_softif_vlan_put(vlan);
-		spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
-		return -EEXIST;
-	}
-
-	vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
-	if (!vlan) {
-		spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
-		return -ENOMEM;
-	}
-
-	vlan->bat_priv = bat_priv;
-	vlan->vid = vid;
-	kref_init(&vlan->refcount);
-
-	atomic_set(&vlan->ap_isolation, 0);
-
-	kref_get(&vlan->refcount);
-	hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
-	spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
-
-	/* add a new TT local entry. This one will be marked with the NOPURGE
-	 * flag
-	 */
-	batadv_tt_local_add(bat_priv->soft_iface,
-			    bat_priv->soft_iface->dev_addr, vid,
-			    BATADV_NULL_IFINDEX, BATADV_NO_MARK);
-
-	/* don't return reference to new softif_vlan */
-	batadv_softif_vlan_put(vlan);
-
-	return 0;
-}
-
-/**
- * batadv_softif_destroy_vlan() - remove and destroy a softif_vlan object
- * @bat_priv: the bat priv with all the soft interface information
- * @vlan: the object to remove
- */
-static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
-				       struct batadv_softif_vlan *vlan)
-{
-	/* explicitly remove the associated TT local entry because it is marked
-	 * with the NOPURGE flag
-	 */
-	batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
-			       vlan->vid, "vlan interface destroyed", false);
-
-	batadv_softif_vlan_put(vlan);
-}
-
-/**
- * batadv_interface_add_vid() - ndo_add_vid API implementation
- * @dev: the netdev of the mesh interface
- * @proto: protocol of the vlan id
- * @vid: identifier of the new vlan
- *
- * Set up all the internal structures for handling the new vlan on top of the
- * mesh interface
- *
- * Return: 0 on success or a negative error code in case of failure.
- */
-static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
-				    unsigned short vid)
-{
-	struct batadv_priv *bat_priv = netdev_priv(dev);
-	struct batadv_softif_vlan *vlan;
-
-	/* only 802.1Q vlans are supported.
-	 * batman-adv does not know how to handle other types
-	 */
-	if (proto != htons(ETH_P_8021Q))
-		return -EINVAL;
-
-	vid |= BATADV_VLAN_HAS_TAG;
-
-	/* if a new vlan is getting created and it already exists, it means that
-	 * it was not deleted yet. batadv_softif_vlan_get() increases the
-	 * refcount in order to revive the object.
-	 *
-	 * if it does not exist then create it.
-	 */
-	vlan = batadv_softif_vlan_get(bat_priv, vid);
-	if (!vlan)
-		return batadv_softif_create_vlan(bat_priv, vid);
-
-	/* add a new TT local entry. This one will be marked with the NOPURGE
-	 * flag. This must be added again, even if the vlan object already
-	 * exists, because the entry was deleted by kill_vid()
-	 */
-	batadv_tt_local_add(bat_priv->soft_iface,
-			    bat_priv->soft_iface->dev_addr, vid,
-			    BATADV_NULL_IFINDEX, BATADV_NO_MARK);
-
-	return 0;
-}
-
-/**
- * batadv_interface_kill_vid() - ndo_kill_vid API implementation
- * @dev: the netdev of the mesh interface
- * @proto: protocol of the vlan id
- * @vid: identifier of the deleted vlan
- *
- * Destroy all the internal structures used to handle the vlan identified by vid
- * on top of the mesh interface
- *
- * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
- * or -ENOENT if the specified vlan id wasn't registered.
- */
-static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
-				     unsigned short vid)
-{
-	struct batadv_priv *bat_priv = netdev_priv(dev);
-	struct batadv_softif_vlan *vlan;
-
-	/* only 802.1Q vlans are supported. batman-adv does not know how to
-	 * handle other types
-	 */
-	if (proto != htons(ETH_P_8021Q))
-		return -EINVAL;
-
-	vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
-	if (!vlan)
-		return -ENOENT;
-
-	batadv_softif_destroy_vlan(bat_priv, vlan);
-
-	/* finally free the vlan object */
-	batadv_softif_vlan_put(vlan);
-
-	return 0;
-}
-
-/* batman-adv network devices have devices nesting below it and are a special
- * "super class" of normal network devices; split their locks off into a
- * separate class since they always nest.
- */
-static struct lock_class_key batadv_netdev_xmit_lock_key;
-static struct lock_class_key batadv_netdev_addr_lock_key;
-
-/**
- * batadv_set_lockdep_class_one() - Set lockdep class for a single tx queue
- * @dev: device which owns the tx queue
- * @txq: tx queue to modify
- * @_unused: always NULL
- */
-static void batadv_set_lockdep_class_one(struct net_device *dev,
-					 struct netdev_queue *txq,
-					 void *_unused)
-{
-	lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
-}
-
-/**
- * batadv_set_lockdep_class() - Set txq and addr_list lockdep class
- * @dev: network device to modify
- */
-static void batadv_set_lockdep_class(struct net_device *dev)
-{
-	lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
-	netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
-}
-
-/**
- * batadv_softif_init_late() - late stage initialization of soft interface
- * @dev: registered network device to modify
- *
- * Return: error code on failures
- */
-static int batadv_softif_init_late(struct net_device *dev)
-{
-	struct batadv_priv *bat_priv;
-	u32 random_seqno;
-	int ret;
-	size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM;
-
-	batadv_set_lockdep_class(dev);
-
-	bat_priv = netdev_priv(dev);
-	bat_priv->soft_iface = dev;
-
-	/* batadv_interface_stats() needs to be available as soon as
-	 * register_netdevice() has been called
-	 */
-	bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64));
-	if (!bat_priv->bat_counters)
-		return -ENOMEM;
-
-	atomic_set(&bat_priv->aggregated_ogms, 1);
-	atomic_set(&bat_priv->bonding, 0);
-#ifdef CONFIG_BATMAN_ADV_BLA
-	atomic_set(&bat_priv->bridge_loop_avoidance, 1);
-#endif
-#ifdef CONFIG_BATMAN_ADV_DAT
-	atomic_set(&bat_priv->distributed_arp_table, 1);
-#endif
-#ifdef CONFIG_BATMAN_ADV_MCAST
-	atomic_set(&bat_priv->multicast_mode, 1);
-	atomic_set(&bat_priv->multicast_fanout, 16);
-	atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);
-	atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0);
-	atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0);
-	atomic_set(&bat_priv->mcast.num_no_mc_ptype_capa, 0);
-#endif
-	atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF);
-	atomic_set(&bat_priv->gw.bandwidth_down, 100);
-	atomic_set(&bat_priv->gw.bandwidth_up, 20);
-	atomic_set(&bat_priv->orig_interval, 1000);
-	atomic_set(&bat_priv->hop_penalty, 30);
-#ifdef CONFIG_BATMAN_ADV_DEBUG
-	atomic_set(&bat_priv->log_level, 0);
-#endif
-	atomic_set(&bat_priv->fragmentation, 1);
-	atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);
-	atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
-	atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
-
-	atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
-	atomic_set(&bat_priv->bcast_seqno, 1);
-	atomic_set(&bat_priv->tt.vn, 0);
-	atomic_set(&bat_priv->tt.local_changes, 0);
-	atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
-#ifdef CONFIG_BATMAN_ADV_BLA
-	atomic_set(&bat_priv->bla.num_requests, 0);
-#endif
-	atomic_set(&bat_priv->tp_num, 0);
-
-	bat_priv->tt.last_changeset = NULL;
-	bat_priv->tt.last_changeset_len = 0;
-	bat_priv->isolation_mark = 0;
-	bat_priv->isolation_mark_mask = 0;
-
-	/* randomize initial seqno to avoid collision */
-	get_random_bytes(&random_seqno, sizeof(random_seqno));
-	atomic_set(&bat_priv->frag_seqno, random_seqno);
-
-	bat_priv->primary_if = NULL;
-
-	batadv_nc_init_bat_priv(bat_priv);
-
-	if (!bat_priv->algo_ops) {
-		ret = batadv_algo_select(bat_priv, batadv_routing_algo);
-		if (ret < 0)
-			goto free_bat_counters;
-	}
-
-	ret = batadv_mesh_init(dev);
-	if (ret < 0)
-		goto free_bat_counters;
-
-	return 0;
-
-free_bat_counters:
-	free_percpu(bat_priv->bat_counters);
-	bat_priv->bat_counters = NULL;
-
-	return ret;
-}
-
-/**
- * batadv_softif_slave_add() - Add a slave interface to a batadv_soft_interface
- * @dev: batadv_soft_interface used as master interface
- * @slave_dev: net_device which should become the slave interface
- * @extack: extended ACK report struct
- *
- * Return: 0 if successful or error otherwise.
- */
-static int batadv_softif_slave_add(struct net_device *dev,
-				   struct net_device *slave_dev,
-				   struct netlink_ext_ack *extack)
-{
-	struct batadv_hard_iface *hard_iface;
-	int ret = -EINVAL;
-
-	hard_iface = batadv_hardif_get_by_netdev(slave_dev);
-	if (!hard_iface || hard_iface->soft_iface)
-		goto out;
-
-	ret = batadv_hardif_enable_interface(hard_iface, dev);
-
-out:
-	batadv_hardif_put(hard_iface);
-	return ret;
-}
-
-/**
- * batadv_softif_slave_del() - Delete a slave iface from a batadv_soft_interface
- * @dev: batadv_soft_interface used as master interface
- * @slave_dev: net_device which should be removed from the master interface
- *
- * Return: 0 if successful or error otherwise.
- */
-static int batadv_softif_slave_del(struct net_device *dev,
-				   struct net_device *slave_dev)
-{
-	struct batadv_hard_iface *hard_iface;
-	int ret = -EINVAL;
-
-	hard_iface = batadv_hardif_get_by_netdev(slave_dev);
-
-	if (!hard_iface || hard_iface->soft_iface != dev)
-		goto out;
-
-	batadv_hardif_disable_interface(hard_iface);
-	ret = 0;
-
-out:
-	batadv_hardif_put(hard_iface);
-	return ret;
-}
-
-static const struct net_device_ops batadv_netdev_ops = {
-	.ndo_init = batadv_softif_init_late,
-	.ndo_open = batadv_interface_open,
-	.ndo_stop = batadv_interface_release,
-	.ndo_get_stats = batadv_interface_stats,
-	.ndo_vlan_rx_add_vid = batadv_interface_add_vid,
-	.ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
-	.ndo_set_mac_address = batadv_interface_set_mac_addr,
-	.ndo_change_mtu = batadv_interface_change_mtu,
-	.ndo_set_rx_mode = batadv_interface_set_rx_mode,
-	.ndo_start_xmit = batadv_interface_tx,
-	.ndo_validate_addr = eth_validate_addr,
-	.ndo_add_slave = batadv_softif_slave_add,
-	.ndo_del_slave = batadv_softif_slave_del,
-};
-
-static void batadv_get_drvinfo(struct net_device *dev,
-			       struct ethtool_drvinfo *info)
-{
-	strscpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
-	strscpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
-	strscpy(info->fw_version, "N/A", sizeof(info->fw_version));
-	strscpy(info->bus_info, "batman", sizeof(info->bus_info));
-}
-
-/* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
- * Declare each description string in struct.name[] to get fixed sized buffer
- * and compile time checking for strings longer than ETH_GSTRING_LEN.
- */
-static const struct {
-	const char name[ETH_GSTRING_LEN];
-} batadv_counters_strings[] = {
-	{ "tx" },
-	{ "tx_bytes" },
-	{ "tx_dropped" },
-	{ "rx" },
-	{ "rx_bytes" },
-	{ "forward" },
-	{ "forward_bytes" },
-	{ "mgmt_tx" },
-	{ "mgmt_tx_bytes" },
-	{ "mgmt_rx" },
-	{ "mgmt_rx_bytes" },
-	{ "frag_tx" },
-	{ "frag_tx_bytes" },
-	{ "frag_rx" },
-	{ "frag_rx_bytes" },
-	{ "frag_fwd" },
-	{ "frag_fwd_bytes" },
-	{ "tt_request_tx" },
-	{ "tt_request_rx" },
-	{ "tt_response_tx" },
-	{ "tt_response_rx" },
-	{ "tt_roam_adv_tx" },
-	{ "tt_roam_adv_rx" },
-#ifdef CONFIG_BATMAN_ADV_MCAST
-	{ "mcast_tx" },
-	{ "mcast_tx_bytes" },
-	{ "mcast_tx_local" },
-	{ "mcast_tx_local_bytes" },
-	{ "mcast_rx" },
-	{ "mcast_rx_bytes" },
-	{ "mcast_rx_local" },
-	{ "mcast_rx_local_bytes" },
-	{ "mcast_fwd" },
-	{ "mcast_fwd_bytes" },
-#endif
-#ifdef CONFIG_BATMAN_ADV_DAT
-	{ "dat_get_tx" },
-	{ "dat_get_rx" },
-	{ "dat_put_tx" },
-	{ "dat_put_rx" },
-	{ "dat_cached_reply_tx" },
-#endif
-#ifdef CONFIG_BATMAN_ADV_NC
-	{ "nc_code" },
-	{ "nc_code_bytes" },
-	{ "nc_recode" },
-	{ "nc_recode_bytes" },
-	{ "nc_buffer" },
-	{ "nc_decode" },
-	{ "nc_decode_bytes" },
-	{ "nc_decode_failed" },
-	{ "nc_sniffed" },
-#endif
-};
-
-static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data)
-{
-	if (stringset == ETH_SS_STATS)
-		memcpy(data, batadv_counters_strings,
-		       sizeof(batadv_counters_strings));
-}
-
-static void batadv_get_ethtool_stats(struct net_device *dev,
-				     struct ethtool_stats *stats, u64 *data)
-{
-	struct batadv_priv *bat_priv = netdev_priv(dev);
-	int i;
-
-	for (i = 0; i < BATADV_CNT_NUM; i++)
-		data[i] = batadv_sum_counter(bat_priv, i);
-}
-
-static int batadv_get_sset_count(struct net_device *dev, int stringset)
-{
-	if (stringset == ETH_SS_STATS)
-		return BATADV_CNT_NUM;
-
-	return -EOPNOTSUPP;
-}
-
-static const struct ethtool_ops batadv_ethtool_ops = {
-	.get_drvinfo = batadv_get_drvinfo,
-	.get_link = ethtool_op_get_link,
-	.get_strings = batadv_get_strings,
-	.get_ethtool_stats = batadv_get_ethtool_stats,
-	.get_sset_count = batadv_get_sset_count,
-};
-
-/**
- * batadv_softif_free() - Deconstructor of batadv_soft_interface
- * @dev: Device to cleanup and remove
- */
-static void batadv_softif_free(struct net_device *dev)
-{
-	batadv_mesh_free(dev);
-
-	/* some scheduled RCU callbacks need the bat_priv struct to accomplish
-	 * their tasks. Wait for them all to be finished before freeing the
-	 * netdev and its private data (bat_priv)
-	 */
-	rcu_barrier();
-}
-
-/**
- * batadv_softif_init_early() - early stage initialization of soft interface
- * @dev: registered network device to modify
- */
-static void batadv_softif_init_early(struct net_device *dev)
-{
-	ether_setup(dev);
-
-	dev->netdev_ops = &batadv_netdev_ops;
-	dev->needs_free_netdev = true;
-	dev->priv_destructor = batadv_softif_free;
-	dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
-	dev->priv_flags |= IFF_NO_QUEUE;
-	dev->lltx = true;
-	dev->netns_local = true;
-
-	/* can't call min_mtu, because the needed variables
-	 * have not been initialized yet
-	 */
-	dev->mtu = ETH_DATA_LEN;
-
-	/* generate random address */
-	eth_hw_addr_random(dev);
-
-	dev->ethtool_ops = &batadv_ethtool_ops;
-}
-
-/**
- * batadv_softif_validate() - validate configuration of new batadv link
- * @tb: IFLA_INFO_DATA netlink attributes
- * @data: enum batadv_ifla_attrs attributes
- * @extack: extended ACK report struct
- *
- * Return: 0 if successful or error otherwise.
- */
-static int batadv_softif_validate(struct nlattr *tb[], struct nlattr *data[],
-				  struct netlink_ext_ack *extack)
-{
-	struct batadv_algo_ops *algo_ops;
-
-	if (!data)
-		return 0;
-
-	if (data[IFLA_BATADV_ALGO_NAME]) {
-		algo_ops = batadv_algo_get(nla_data(data[IFLA_BATADV_ALGO_NAME]));
-		if (!algo_ops)
-			return -EINVAL;
-	}
-
-	return 0;
-}
-
-/**
- * batadv_softif_newlink() - pre-initialize and register new batadv link
- * @src_net: the applicable net namespace
- * @dev: network device to register
- * @tb: IFLA_INFO_DATA netlink attributes
- * @data: enum batadv_ifla_attrs attributes
- * @extack: extended ACK report struct
- *
- * Return: 0 if successful or error otherwise.
- */
-static int batadv_softif_newlink(struct net *src_net, struct net_device *dev,
-				 struct nlattr *tb[], struct nlattr *data[],
-				 struct netlink_ext_ack *extack)
-{
-	struct batadv_priv *bat_priv = netdev_priv(dev);
-	const char *algo_name;
-	int err;
-
-	if (data && data[IFLA_BATADV_ALGO_NAME]) {
-		algo_name = nla_data(data[IFLA_BATADV_ALGO_NAME]);
-		err = batadv_algo_select(bat_priv, algo_name);
-		if (err)
-			return -EINVAL;
-	}
-
-	return register_netdevice(dev);
-}
-
-/**
- * batadv_softif_destroy_netlink() - deletion of batadv_soft_interface via
- *  netlink
- * @soft_iface: the to-be-removed batman-adv interface
- * @head: list pointer
- */
-static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
-					  struct list_head *head)
-{
-	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
-	struct batadv_hard_iface *hard_iface;
-	struct batadv_softif_vlan *vlan;
-
-	list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
-		if (hard_iface->soft_iface == soft_iface)
-			batadv_hardif_disable_interface(hard_iface);
-	}
-
-	/* destroy the "untagged" VLAN */
-	vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
-	if (vlan) {
-		batadv_softif_destroy_vlan(bat_priv, vlan);
-		batadv_softif_vlan_put(vlan);
-	}
-
-	unregister_netdevice_queue(soft_iface, head);
-}
-
-/**
- * batadv_softif_is_valid() - Check whether device is a batadv soft interface
- * @net_dev: device which should be checked
- *
- * Return: true when net_dev is a batman-adv interface, false otherwise
- */
-bool batadv_softif_is_valid(const struct net_device *net_dev)
-{
-	if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
-		return true;
-
-	return false;
-}
-
-static const struct nla_policy batadv_ifla_policy[IFLA_BATADV_MAX + 1] = {
-	[IFLA_BATADV_ALGO_NAME]	= { .type = NLA_NUL_STRING },
-};
-
-struct rtnl_link_ops batadv_link_ops __read_mostly = {
-	.kind		= "batadv",
-	.priv_size	= sizeof(struct batadv_priv),
-	.setup		= batadv_softif_init_early,
-	.maxtype	= IFLA_BATADV_MAX,
-	.policy		= batadv_ifla_policy,
-	.validate	= batadv_softif_validate,
-	.newlink	= batadv_softif_newlink,
-	.dellink	= batadv_softif_destroy_netlink,
-};