Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1514 insertions, 0 deletions

diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
new file mode 100644
index 000000000..931bc3b5c
--- /dev/null
+++ b/net/batman-adv/netlink.c
@@ -0,0 +1,1514 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2016-2020  B.A.T.M.A.N. contributors:
+ *
+ * Matthias Schiffer
+ */
+
+#include "netlink.h"
+#include "main.h"
+
+#include <linux/atomic.h>
+#include <linux/bitops.h>
+#include <linux/bug.h>
+#include <linux/byteorder/generic.h>
+#include <linux/cache.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/genetlink.h>
+#include <linux/gfp.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/limits.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/netlink.h>
+#include <linux/printk.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/stddef.h>
+#include <linux/types.h>
+#include <net/genetlink.h>
+#include <net/net_namespace.h>
+#include <net/netlink.h>
+#include <net/sock.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 "gateway_common.h"
+#include "hard-interface.h"
+#include "log.h"
+#include "multicast.h"
+#include "network-coding.h"
+#include "originator.h"
+#include "soft-interface.h"
+#include "tp_meter.h"
+#include "translation-table.h"
+
+struct genl_family batadv_netlink_family;
+
+/* multicast groups */
+enum batadv_netlink_multicast_groups {
+	BATADV_NL_MCGRP_CONFIG,
+	BATADV_NL_MCGRP_TPMETER,
+};
+
+/**
+ * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags
+ */
+enum batadv_genl_ops_flags {
+	/**
+	 * @BATADV_FLAG_NEED_MESH: request requires valid soft interface in
+	 *  attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be
+	 *  saved in info->user_ptr[0]
+	 */
+	BATADV_FLAG_NEED_MESH = BIT(0),
+
+	/**
+	 * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in
+	 *  attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be
+	 *  saved in info->user_ptr[1]
+	 */
+	BATADV_FLAG_NEED_HARDIF = BIT(1),
+
+	/**
+	 * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in
+	 *  attribute BATADV_ATTR_VLANID and expects a pointer to it to be
+	 *  saved in info->user_ptr[1]
+	 */
+	BATADV_FLAG_NEED_VLAN = BIT(2),
+};
+
+static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
+	[BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG },
+	[BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
+};
+
+static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
+	[BATADV_ATTR_VERSION]			= { .type = NLA_STRING },
+	[BATADV_ATTR_ALGO_NAME]			= { .type = NLA_STRING },
+	[BATADV_ATTR_MESH_IFINDEX]		= { .type = NLA_U32 },
+	[BATADV_ATTR_MESH_IFNAME]		= { .type = NLA_STRING },
+	[BATADV_ATTR_MESH_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_HARD_IFINDEX]		= { .type = NLA_U32 },
+	[BATADV_ATTR_HARD_IFNAME]		= { .type = NLA_STRING },
+	[BATADV_ATTR_HARD_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_ORIG_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_TPMETER_RESULT]		= { .type = NLA_U8 },
+	[BATADV_ATTR_TPMETER_TEST_TIME]		= { .type = NLA_U32 },
+	[BATADV_ATTR_TPMETER_BYTES]		= { .type = NLA_U64 },
+	[BATADV_ATTR_TPMETER_COOKIE]		= { .type = NLA_U32 },
+	[BATADV_ATTR_ACTIVE]			= { .type = NLA_FLAG },
+	[BATADV_ATTR_TT_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_TT_TTVN]			= { .type = NLA_U8 },
+	[BATADV_ATTR_TT_LAST_TTVN]		= { .type = NLA_U8 },
+	[BATADV_ATTR_TT_CRC32]			= { .type = NLA_U32 },
+	[BATADV_ATTR_TT_VID]			= { .type = NLA_U16 },
+	[BATADV_ATTR_TT_FLAGS]			= { .type = NLA_U32 },
+	[BATADV_ATTR_FLAG_BEST]			= { .type = NLA_FLAG },
+	[BATADV_ATTR_LAST_SEEN_MSECS]		= { .type = NLA_U32 },
+	[BATADV_ATTR_NEIGH_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_TQ]			= { .type = NLA_U8 },
+	[BATADV_ATTR_THROUGHPUT]		= { .type = NLA_U32 },
+	[BATADV_ATTR_BANDWIDTH_UP]		= { .type = NLA_U32 },
+	[BATADV_ATTR_BANDWIDTH_DOWN]		= { .type = NLA_U32 },
+	[BATADV_ATTR_ROUTER]			= { .len = ETH_ALEN },
+	[BATADV_ATTR_BLA_OWN]			= { .type = NLA_FLAG },
+	[BATADV_ATTR_BLA_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_BLA_VID]			= { .type = NLA_U16 },
+	[BATADV_ATTR_BLA_BACKBONE]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_BLA_CRC]			= { .type = NLA_U16 },
+	[BATADV_ATTR_DAT_CACHE_IP4ADDRESS]	= { .type = NLA_U32 },
+	[BATADV_ATTR_DAT_CACHE_HWADDRESS]	= { .len = ETH_ALEN },
+	[BATADV_ATTR_DAT_CACHE_VID]		= { .type = NLA_U16 },
+	[BATADV_ATTR_MCAST_FLAGS]		= { .type = NLA_U32 },
+	[BATADV_ATTR_MCAST_FLAGS_PRIV]		= { .type = NLA_U32 },
+	[BATADV_ATTR_VLANID]			= { .type = NLA_U16 },
+	[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]	= { .type = NLA_U8 },
+	[BATADV_ATTR_AP_ISOLATION_ENABLED]	= { .type = NLA_U8 },
+	[BATADV_ATTR_ISOLATION_MARK]		= { .type = NLA_U32 },
+	[BATADV_ATTR_ISOLATION_MASK]		= { .type = NLA_U32 },
+	[BATADV_ATTR_BONDING_ENABLED]		= { .type = NLA_U8 },
+	[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]	= { .type = NLA_U8 },
+	[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]	= { .type = NLA_U8 },
+	[BATADV_ATTR_FRAGMENTATION_ENABLED]	= { .type = NLA_U8 },
+	[BATADV_ATTR_GW_BANDWIDTH_DOWN]		= { .type = NLA_U32 },
+	[BATADV_ATTR_GW_BANDWIDTH_UP]		= { .type = NLA_U32 },
+	[BATADV_ATTR_GW_MODE]			= { .type = NLA_U8 },
+	[BATADV_ATTR_GW_SEL_CLASS]		= { .type = NLA_U32 },
+	[BATADV_ATTR_HOP_PENALTY]		= { .type = NLA_U8 },
+	[BATADV_ATTR_LOG_LEVEL]			= { .type = NLA_U32 },
+	[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]	= { .type = NLA_U8 },
+	[BATADV_ATTR_MULTICAST_FANOUT]		= { .type = NLA_U32 },
+	[BATADV_ATTR_NETWORK_CODING_ENABLED]	= { .type = NLA_U8 },
+	[BATADV_ATTR_ORIG_INTERVAL]		= { .type = NLA_U32 },
+	[BATADV_ATTR_ELP_INTERVAL]		= { .type = NLA_U32 },
+	[BATADV_ATTR_THROUGHPUT_OVERRIDE]	= { .type = NLA_U32 },
+};
+
+/**
+ * batadv_netlink_get_ifindex() - Extract an interface index from a message
+ * @nlh: Message header
+ * @attrtype: Attribute which holds an interface index
+ *
+ * Return: interface index, or 0.
+ */
+int
+batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
+{
+	struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
+
+	return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
+}
+
+/**
+ * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation softif attribute
+ * @msg: Netlink message to dump into
+ * @bat_priv: the bat priv with all the soft interface information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg,
+						 struct batadv_priv *bat_priv)
+{
+	struct batadv_softif_vlan *vlan;
+	u8 ap_isolation;
+
+	vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
+	if (!vlan)
+		return 0;
+
+	ap_isolation = atomic_read(&vlan->ap_isolation);
+	batadv_softif_vlan_put(vlan);
+
+	return nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
+			  !!ap_isolation);
+}
+
+/**
+ * batadv_option_set_ap_isolation() - Set ap_isolation from genl msg
+ * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute
+ * @bat_priv: the bat priv with all the soft interface information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr,
+						struct batadv_priv *bat_priv)
+{
+	struct batadv_softif_vlan *vlan;
+
+	vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
+	if (!vlan)
+		return -ENOENT;
+
+	atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
+	batadv_softif_vlan_put(vlan);
+
+	return 0;
+}
+
+/**
+ * batadv_netlink_mesh_fill() - Fill message with mesh attributes
+ * @msg: Netlink message to dump into
+ * @bat_priv: the bat priv with all the soft interface information
+ * @cmd: type of message to generate
+ * @portid: Port making netlink request
+ * @seq: sequence number for message
+ * @flags: Additional flags for message
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_mesh_fill(struct sk_buff *msg,
+				    struct batadv_priv *bat_priv,
+				    enum batadv_nl_commands cmd,
+				    u32 portid, u32 seq, int flags)
+{
+	struct net_device *soft_iface = bat_priv->soft_iface;
+	struct batadv_hard_iface *primary_if = NULL;
+	struct net_device *hard_iface;
+	void *hdr;
+
+	hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
+	if (!hdr)
+		return -ENOBUFS;
+
+	if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
+	    nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
+			   bat_priv->algo_ops->name) ||
+	    nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
+	    nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
+	    nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
+		    soft_iface->dev_addr) ||
+	    nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
+		       (u8)atomic_read(&bat_priv->tt.vn)))
+		goto nla_put_failure;
+
+#ifdef CONFIG_BATMAN_ADV_BLA
+	if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
+			ntohs(bat_priv->bla.claim_dest.group)))
+		goto nla_put_failure;
+#endif
+
+	if (batadv_mcast_mesh_info_put(msg, bat_priv))
+		goto nla_put_failure;
+
+	primary_if = batadv_primary_if_get_selected(bat_priv);
+	if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
+		hard_iface = primary_if->net_dev;
+
+		if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
+				hard_iface->ifindex) ||
+		    nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
+				   hard_iface->name) ||
+		    nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
+			    hard_iface->dev_addr))
+			goto nla_put_failure;
+	}
+
+	if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS_ENABLED,
+		       !!atomic_read(&bat_priv->aggregated_ogms)))
+		goto nla_put_failure;
+
+	if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MARK,
+			bat_priv->isolation_mark))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MASK,
+			bat_priv->isolation_mark_mask))
+		goto nla_put_failure;
+
+	if (nla_put_u8(msg, BATADV_ATTR_BONDING_ENABLED,
+		       !!atomic_read(&bat_priv->bonding)))
+		goto nla_put_failure;
+
+#ifdef CONFIG_BATMAN_ADV_BLA
+	if (nla_put_u8(msg, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
+		       !!atomic_read(&bat_priv->bridge_loop_avoidance)))
+		goto nla_put_failure;
+#endif /* CONFIG_BATMAN_ADV_BLA */
+
+#ifdef CONFIG_BATMAN_ADV_DAT
+	if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
+		       !!atomic_read(&bat_priv->distributed_arp_table)))
+		goto nla_put_failure;
+#endif /* CONFIG_BATMAN_ADV_DAT */
+
+	if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED,
+		       !!atomic_read(&bat_priv->fragmentation)))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_DOWN,
+			atomic_read(&bat_priv->gw.bandwidth_down)))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_UP,
+			atomic_read(&bat_priv->gw.bandwidth_up)))
+		goto nla_put_failure;
+
+	if (nla_put_u8(msg, BATADV_ATTR_GW_MODE,
+		       atomic_read(&bat_priv->gw.mode)))
+		goto nla_put_failure;
+
+	if (bat_priv->algo_ops->gw.get_best_gw_node &&
+	    bat_priv->algo_ops->gw.is_eligible) {
+		/* GW selection class is not available if the routing algorithm
+		 * in use does not implement the GW API
+		 */
+		if (nla_put_u32(msg, BATADV_ATTR_GW_SEL_CLASS,
+				atomic_read(&bat_priv->gw.sel_class)))
+			goto nla_put_failure;
+	}
+
+	if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
+		       atomic_read(&bat_priv->hop_penalty)))
+		goto nla_put_failure;
+
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+	if (nla_put_u32(msg, BATADV_ATTR_LOG_LEVEL,
+			atomic_read(&bat_priv->log_level)))
+		goto nla_put_failure;
+#endif /* CONFIG_BATMAN_ADV_DEBUG */
+
+#ifdef CONFIG_BATMAN_ADV_MCAST
+	if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
+		       !atomic_read(&bat_priv->multicast_mode)))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_MULTICAST_FANOUT,
+			atomic_read(&bat_priv->multicast_fanout)))
+		goto nla_put_failure;
+#endif /* CONFIG_BATMAN_ADV_MCAST */
+
+#ifdef CONFIG_BATMAN_ADV_NC
+	if (nla_put_u8(msg, BATADV_ATTR_NETWORK_CODING_ENABLED,
+		       !!atomic_read(&bat_priv->network_coding)))
+		goto nla_put_failure;
+#endif /* CONFIG_BATMAN_ADV_NC */
+
+	if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL,
+			atomic_read(&bat_priv->orig_interval)))
+		goto nla_put_failure;
+
+	if (primary_if)
+		batadv_hardif_put(primary_if);
+
+	genlmsg_end(msg, hdr);
+	return 0;
+
+nla_put_failure:
+	if (primary_if)
+		batadv_hardif_put(primary_if);
+
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+/**
+ * batadv_netlink_notify_mesh() - send softif attributes to listener
+ * @bat_priv: the bat priv with all the soft interface information
+ *
+ * Return: 0 on success, < 0 on error
+ */
+int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
+{
+	struct sk_buff *msg;
+	int ret;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH,
+				       0, 0, 0);
+	if (ret < 0) {
+		nlmsg_free(msg);
+		return ret;
+	}
+
+	genlmsg_multicast_netns(&batadv_netlink_family,
+				dev_net(bat_priv->soft_iface), msg, 0,
+				BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
+
+	return 0;
+}
+
+/**
+ * batadv_netlink_get_mesh() - Get softif attributes
+ * @skb: Netlink message with request data
+ * @info: receiver information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info)
+{
+	struct batadv_priv *bat_priv = info->user_ptr[0];
+	struct sk_buff *msg;
+	int ret;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH,
+				       info->snd_portid, info->snd_seq, 0);
+	if (ret < 0) {
+		nlmsg_free(msg);
+		return ret;
+	}
+
+	ret = genlmsg_reply(msg, info);
+
+	return ret;
+}
+
+/**
+ * batadv_netlink_set_mesh() - Set softif attributes
+ * @skb: Netlink message with request data
+ * @info: receiver information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
+{
+	struct batadv_priv *bat_priv = info->user_ptr[0];
+	struct nlattr *attr;
+
+	if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED];
+
+		atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr));
+	}
+
+	if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
+
+		batadv_netlink_set_mesh_ap_isolation(attr, bat_priv);
+	}
+
+	if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) {
+		attr = info->attrs[BATADV_ATTR_ISOLATION_MARK];
+
+		bat_priv->isolation_mark = nla_get_u32(attr);
+	}
+
+	if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) {
+		attr = info->attrs[BATADV_ATTR_ISOLATION_MASK];
+
+		bat_priv->isolation_mark_mask = nla_get_u32(attr);
+	}
+
+	if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_BONDING_ENABLED];
+
+		atomic_set(&bat_priv->bonding, !!nla_get_u8(attr));
+	}
+
+#ifdef CONFIG_BATMAN_ADV_BLA
+	if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED];
+
+		atomic_set(&bat_priv->bridge_loop_avoidance,
+			   !!nla_get_u8(attr));
+		batadv_bla_status_update(bat_priv->soft_iface);
+	}
+#endif /* CONFIG_BATMAN_ADV_BLA */
+
+#ifdef CONFIG_BATMAN_ADV_DAT
+	if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
+
+		atomic_set(&bat_priv->distributed_arp_table,
+			   !!nla_get_u8(attr));
+		batadv_dat_status_update(bat_priv->soft_iface);
+	}
+#endif /* CONFIG_BATMAN_ADV_DAT */
+
+	if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
+
+		atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr));
+
+		rtnl_lock();
+		batadv_update_min_mtu(bat_priv->soft_iface);
+		rtnl_unlock();
+	}
+
+	if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {
+		attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN];
+
+		atomic_set(&bat_priv->gw.bandwidth_down, nla_get_u32(attr));
+		batadv_gw_tvlv_container_update(bat_priv);
+	}
+
+	if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) {
+		attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP];
+
+		atomic_set(&bat_priv->gw.bandwidth_up, nla_get_u32(attr));
+		batadv_gw_tvlv_container_update(bat_priv);
+	}
+
+	if (info->attrs[BATADV_ATTR_GW_MODE]) {
+		u8 gw_mode;
+
+		attr = info->attrs[BATADV_ATTR_GW_MODE];
+		gw_mode = nla_get_u8(attr);
+
+		if (gw_mode <= BATADV_GW_MODE_SERVER) {
+			/* Invoking batadv_gw_reselect() is not enough to really
+			 * de-select the current GW. It will only instruct the
+			 * gateway client code to perform a re-election the next
+			 * time that this is needed.
+			 *
+			 * When gw client mode is being switched off the current
+			 * GW must be de-selected explicitly otherwise no GW_ADD
+			 * uevent is thrown on client mode re-activation. This
+			 * is operation is performed in
+			 * batadv_gw_check_client_stop().
+			 */
+			batadv_gw_reselect(bat_priv);
+
+			/* always call batadv_gw_check_client_stop() before
+			 * changing the gateway state
+			 */
+			batadv_gw_check_client_stop(bat_priv);
+			atomic_set(&bat_priv->gw.mode, gw_mode);
+			batadv_gw_tvlv_container_update(bat_priv);
+		}
+	}
+
+	if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] &&
+	    bat_priv->algo_ops->gw.get_best_gw_node &&
+	    bat_priv->algo_ops->gw.is_eligible) {
+		/* setting the GW selection class is allowed only if the routing
+		 * algorithm in use implements the GW API
+		 */
+
+		u32 sel_class_max = 0xffffffffu;
+		u32 sel_class;
+
+		attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
+		sel_class = nla_get_u32(attr);
+
+		if (!bat_priv->algo_ops->gw.store_sel_class)
+			sel_class_max = BATADV_TQ_MAX_VALUE;
+
+		if (sel_class >= 1 && sel_class <= sel_class_max) {
+			atomic_set(&bat_priv->gw.sel_class, sel_class);
+			batadv_gw_reselect(bat_priv);
+		}
+	}
+
+	if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
+		attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
+
+		atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr));
+	}
+
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+	if (info->attrs[BATADV_ATTR_LOG_LEVEL]) {
+		attr = info->attrs[BATADV_ATTR_LOG_LEVEL];
+
+		atomic_set(&bat_priv->log_level,
+			   nla_get_u32(attr) & BATADV_DBG_ALL);
+	}
+#endif /* CONFIG_BATMAN_ADV_DEBUG */
+
+#ifdef CONFIG_BATMAN_ADV_MCAST
+	if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
+
+		atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr));
+	}
+
+	if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) {
+		attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT];
+
+		atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr));
+	}
+#endif /* CONFIG_BATMAN_ADV_MCAST */
+
+#ifdef CONFIG_BATMAN_ADV_NC
+	if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED];
+
+		atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr));
+		batadv_nc_status_update(bat_priv->soft_iface);
+	}
+#endif /* CONFIG_BATMAN_ADV_NC */
+
+	if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
+		u32 orig_interval;
+
+		attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
+		orig_interval = nla_get_u32(attr);
+
+		orig_interval = min_t(u32, orig_interval, INT_MAX);
+		orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
+
+		atomic_set(&bat_priv->orig_interval, orig_interval);
+	}
+
+	batadv_netlink_notify_mesh(bat_priv);
+
+	return 0;
+}
+
+/**
+ * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
+ * @msg: netlink message to be sent back
+ * @cookie: tp meter session cookie
+ *
+ *  Return: 0 on success, < 0 on error
+ */
+static int
+batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
+{
+	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
+		return -ENOBUFS;
+
+	return 0;
+}
+
+/**
+ * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
+ * @bat_priv: the bat priv with all the soft interface information
+ * @dst: destination of tp_meter session
+ * @result: reason for tp meter session stop
+ * @test_time: total time of the tp_meter session
+ * @total_bytes: bytes acked to the receiver
+ * @cookie: cookie of tp_meter session
+ *
+ * Return: 0 on success, < 0 on error
+ */
+int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
+				  u8 result, u32 test_time, u64 total_bytes,
+				  u32 cookie)
+{
+	struct sk_buff *msg;
+	void *hdr;
+	int ret;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
+			  BATADV_CMD_TP_METER);
+	if (!hdr) {
+		ret = -ENOBUFS;
+		goto err_genlmsg;
+	}
+
+	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
+		goto nla_put_failure;
+
+	if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
+			      BATADV_ATTR_PAD))
+		goto nla_put_failure;
+
+	if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
+		goto nla_put_failure;
+
+	if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
+		goto nla_put_failure;
+
+	genlmsg_end(msg, hdr);
+
+	genlmsg_multicast_netns(&batadv_netlink_family,
+				dev_net(bat_priv->soft_iface), msg, 0,
+				BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
+
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	ret = -EMSGSIZE;
+
+err_genlmsg:
+	nlmsg_free(msg);
+	return ret;
+}
+
+/**
+ * batadv_netlink_tp_meter_start() - Start a new tp_meter session
+ * @skb: received netlink message
+ * @info: receiver information
+ *
+ * Return: 0 on success, < 0 on error
+ */
+static int
+batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
+{
+	struct batadv_priv *bat_priv = info->user_ptr[0];
+	struct sk_buff *msg = NULL;
+	u32 test_length;
+	void *msg_head;
+	u32 cookie;
+	u8 *dst;
+	int ret;
+
+	if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
+		return -EINVAL;
+
+	if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
+		return -EINVAL;
+
+	dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
+
+	test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
+			       &batadv_netlink_family, 0,
+			       BATADV_CMD_TP_METER);
+	if (!msg_head) {
+		ret = -ENOBUFS;
+		goto out;
+	}
+
+	batadv_tp_start(bat_priv, dst, test_length, &cookie);
+
+	ret = batadv_netlink_tp_meter_put(msg, cookie);
+
+ out:
+	if (ret) {
+		if (msg)
+			nlmsg_free(msg);
+		return ret;
+	}
+
+	genlmsg_end(msg, msg_head);
+	return genlmsg_reply(msg, info);
+}
+
+/**
+ * batadv_netlink_tp_meter_start() - Cancel a running tp_meter session
+ * @skb: received netlink message
+ * @info: receiver information
+ *
+ * Return: 0 on success, < 0 on error
+ */
+static int
+batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
+{
+	struct batadv_priv *bat_priv = info->user_ptr[0];
+	u8 *dst;
+	int ret = 0;
+
+	if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
+		return -EINVAL;
+
+	dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
+
+	batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
+
+	return ret;
+}
+
+/**
+ * batadv_netlink_hardif_fill() - Fill message with hardif attributes
+ * @msg: Netlink message to dump into
+ * @bat_priv: the bat priv with all the soft interface information
+ * @hard_iface: hard interface which was modified
+ * @cmd: type of message to generate
+ * @portid: Port making netlink request
+ * @seq: sequence number for message
+ * @flags: Additional flags for message
+ * @cb: Control block containing additional options
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_hardif_fill(struct sk_buff *msg,
+				      struct batadv_priv *bat_priv,
+				      struct batadv_hard_iface *hard_iface,
+				      enum batadv_nl_commands cmd,
+				      u32 portid, u32 seq, int flags,
+				      struct netlink_callback *cb)
+{
+	struct net_device *net_dev = hard_iface->net_dev;
+	void *hdr;
+
+	hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
+	if (!hdr)
+		return -ENOBUFS;
+
+	if (cb)
+		genl_dump_check_consistent(cb, hdr);
+
+	if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
+			bat_priv->soft_iface->ifindex))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
+			net_dev->ifindex) ||
+	    nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
+			   net_dev->name) ||
+	    nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
+		    net_dev->dev_addr))
+		goto nla_put_failure;
+
+	if (hard_iface->if_status == BATADV_IF_ACTIVE) {
+		if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
+			goto nla_put_failure;
+	}
+
+	if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
+		       atomic_read(&hard_iface->hop_penalty)))
+		goto nla_put_failure;
+
+#ifdef CONFIG_BATMAN_ADV_BATMAN_V
+	if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL,
+			atomic_read(&hard_iface->bat_v.elp_interval)))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE,
+			atomic_read(&hard_iface->bat_v.throughput_override)))
+		goto nla_put_failure;
+#endif /* CONFIG_BATMAN_ADV_BATMAN_V */
+
+	genlmsg_end(msg, hdr);
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+/**
+ * batadv_netlink_notify_hardif() - send hardif attributes to listener
+ * @bat_priv: the bat priv with all the soft interface information
+ * @hard_iface: hard interface which was modified
+ *
+ * Return: 0 on success, < 0 on error
+ */
+int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
+				 struct batadv_hard_iface *hard_iface)
+{
+	struct sk_buff *msg;
+	int ret;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
+					 BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL);
+	if (ret < 0) {
+		nlmsg_free(msg);
+		return ret;
+	}
+
+	genlmsg_multicast_netns(&batadv_netlink_family,
+				dev_net(bat_priv->soft_iface), msg, 0,
+				BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
+
+	return 0;
+}
+
+/**
+ * batadv_netlink_get_hardif() - Get hardif attributes
+ * @skb: Netlink message with request data
+ * @info: receiver information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_get_hardif(struct sk_buff *skb,
+				     struct genl_info *info)
+{
+	struct batadv_hard_iface *hard_iface = info->user_ptr[1];
+	struct batadv_priv *bat_priv = info->user_ptr[0];
+	struct sk_buff *msg;
+	int ret;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
+					 BATADV_CMD_GET_HARDIF,
+					 info->snd_portid, info->snd_seq, 0,
+					 NULL);
+	if (ret < 0) {
+		nlmsg_free(msg);
+		return ret;
+	}
+
+	ret = genlmsg_reply(msg, info);
+
+	return ret;
+}
+
+/**
+ * batadv_netlink_set_hardif() - Set hardif attributes
+ * @skb: Netlink message with request data
+ * @info: receiver information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_set_hardif(struct sk_buff *skb,
+				     struct genl_info *info)
+{
+	struct batadv_hard_iface *hard_iface = info->user_ptr[1];
+	struct batadv_priv *bat_priv = info->user_ptr[0];
+	struct nlattr *attr;
+
+	if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
+		attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
+
+		atomic_set(&hard_iface->hop_penalty, nla_get_u8(attr));
+	}
+
+#ifdef CONFIG_BATMAN_ADV_BATMAN_V
+
+	if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) {
+		attr = info->attrs[BATADV_ATTR_ELP_INTERVAL];
+
+		atomic_set(&hard_iface->bat_v.elp_interval, nla_get_u32(attr));
+	}
+
+	if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) {
+		attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE];
+
+		atomic_set(&hard_iface->bat_v.throughput_override,
+			   nla_get_u32(attr));
+	}
+#endif /* CONFIG_BATMAN_ADV_BATMAN_V */
+
+	batadv_netlink_notify_hardif(bat_priv, hard_iface);
+
+	return 0;
+}
+
+/**
+ * batadv_netlink_dump_hardif() - Dump all hard interface into a messages
+ * @msg: Netlink message to dump into
+ * @cb: Parameters from query
+ *
+ * Return: error code, or length of reply message on success
+ */
+static int
+batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb)
+{
+	struct net *net = sock_net(cb->skb->sk);
+	struct net_device *soft_iface;
+	struct batadv_hard_iface *hard_iface;
+	struct batadv_priv *bat_priv;
+	int ifindex;
+	int portid = NETLINK_CB(cb->skb).portid;
+	int skip = cb->args[0];
+	int i = 0;
+
+	ifindex = batadv_netlink_get_ifindex(cb->nlh,
+					     BATADV_ATTR_MESH_IFINDEX);
+	if (!ifindex)
+		return -EINVAL;
+
+	soft_iface = dev_get_by_index(net, ifindex);
+	if (!soft_iface)
+		return -ENODEV;
+
+	if (!batadv_softif_is_valid(soft_iface)) {
+		dev_put(soft_iface);
+		return -ENODEV;
+	}
+
+	bat_priv = netdev_priv(soft_iface);
+
+	rtnl_lock();
+	cb->seq = batadv_hardif_generation << 1 | 1;
+
+	list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
+		if (hard_iface->soft_iface != soft_iface)
+			continue;
+
+		if (i++ < skip)
+			continue;
+
+		if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
+					       BATADV_CMD_GET_HARDIF,
+					       portid, cb->nlh->nlmsg_seq,
+					       NLM_F_MULTI, cb)) {
+			i--;
+			break;
+		}
+	}
+
+	rtnl_unlock();
+
+	dev_put(soft_iface);
+
+	cb->args[0] = i;
+
+	return msg->len;
+}
+
+/**
+ * batadv_netlink_vlan_fill() - Fill message with vlan attributes
+ * @msg: Netlink message to dump into
+ * @bat_priv: the bat priv with all the soft interface information
+ * @vlan: vlan which was modified
+ * @cmd: type of message to generate
+ * @portid: Port making netlink request
+ * @seq: sequence number for message
+ * @flags: Additional flags for message
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_vlan_fill(struct sk_buff *msg,
+				    struct batadv_priv *bat_priv,
+				    struct batadv_softif_vlan *vlan,
+				    enum batadv_nl_commands cmd,
+				    u32 portid, u32 seq, int flags)
+{
+	void *hdr;
+
+	hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
+	if (!hdr)
+		return -ENOBUFS;
+
+	if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
+			bat_priv->soft_iface->ifindex))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK))
+		goto nla_put_failure;
+
+	if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
+		       !!atomic_read(&vlan->ap_isolation)))
+		goto nla_put_failure;
+
+	genlmsg_end(msg, hdr);
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+/**
+ * batadv_netlink_notify_vlan() - send vlan attributes to listener
+ * @bat_priv: the bat priv with all the soft interface information
+ * @vlan: vlan which was modified
+ *
+ * Return: 0 on success, < 0 on error
+ */
+int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
+			       struct batadv_softif_vlan *vlan)
+{
+	struct sk_buff *msg;
+	int ret;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan,
+				       BATADV_CMD_SET_VLAN, 0, 0, 0);
+	if (ret < 0) {
+		nlmsg_free(msg);
+		return ret;
+	}
+
+	genlmsg_multicast_netns(&batadv_netlink_family,
+				dev_net(bat_priv->soft_iface), msg, 0,
+				BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
+
+	return 0;
+}
+
+/**
+ * batadv_netlink_get_vlan() - Get vlan attributes
+ * @skb: Netlink message with request data
+ * @info: receiver information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info)
+{
+	struct batadv_softif_vlan *vlan = info->user_ptr[1];
+	struct batadv_priv *bat_priv = info->user_ptr[0];
+	struct sk_buff *msg;
+	int ret;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN,
+				       info->snd_portid, info->snd_seq, 0);
+	if (ret < 0) {
+		nlmsg_free(msg);
+		return ret;
+	}
+
+	ret = genlmsg_reply(msg, info);
+
+	return ret;
+}
+
+/**
+ * batadv_netlink_set_vlan() - Get vlan attributes
+ * @skb: Netlink message with request data
+ * @info: receiver information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info)
+{
+	struct batadv_softif_vlan *vlan = info->user_ptr[1];
+	struct batadv_priv *bat_priv = info->user_ptr[0];
+	struct nlattr *attr;
+
+	if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
+		attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
+
+		atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
+	}
+
+	batadv_netlink_notify_vlan(bat_priv, vlan);
+
+	return 0;
+}
+
+/**
+ * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes
+ * @net: the applicable net namespace
+ * @info: receiver information
+ *
+ * Return: Pointer to soft interface (with increased refcnt) on success, error
+ *  pointer on error
+ */
+static struct net_device *
+batadv_get_softif_from_info(struct net *net, struct genl_info *info)
+{
+	struct net_device *soft_iface;
+	int ifindex;
+
+	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
+		return ERR_PTR(-EINVAL);
+
+	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
+
+	soft_iface = dev_get_by_index(net, ifindex);
+	if (!soft_iface)
+		return ERR_PTR(-ENODEV);
+
+	if (!batadv_softif_is_valid(soft_iface))
+		goto err_put_softif;
+
+	return soft_iface;
+
+err_put_softif:
+	dev_put(soft_iface);
+
+	return ERR_PTR(-EINVAL);
+}
+
+/**
+ * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes
+ * @bat_priv: the bat priv with all the soft interface information
+ * @net: the applicable net namespace
+ * @info: receiver information
+ *
+ * Return: Pointer to hard interface (with increased refcnt) on success, error
+ *  pointer on error
+ */
+static struct batadv_hard_iface *
+batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net,
+			    struct genl_info *info)
+{
+	struct batadv_hard_iface *hard_iface;
+	struct net_device *hard_dev;
+	unsigned int hardif_index;
+
+	if (!info->attrs[BATADV_ATTR_HARD_IFINDEX])
+		return ERR_PTR(-EINVAL);
+
+	hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]);
+
+	hard_dev = dev_get_by_index(net, hardif_index);
+	if (!hard_dev)
+		return ERR_PTR(-ENODEV);
+
+	hard_iface = batadv_hardif_get_by_netdev(hard_dev);
+	if (!hard_iface)
+		goto err_put_harddev;
+
+	if (hard_iface->soft_iface != bat_priv->soft_iface)
+		goto err_put_hardif;
+
+	/* hard_dev is referenced by hard_iface and not needed here */
+	dev_put(hard_dev);
+
+	return hard_iface;
+
+err_put_hardif:
+	batadv_hardif_put(hard_iface);
+err_put_harddev:
+	dev_put(hard_dev);
+
+	return ERR_PTR(-EINVAL);
+}
+
+/**
+ * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes
+ * @bat_priv: the bat priv with all the soft interface information
+ * @net: the applicable net namespace
+ * @info: receiver information
+ *
+ * Return: Pointer to vlan on success (with increased refcnt), error pointer
+ *  on error
+ */
+static struct batadv_softif_vlan *
+batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net,
+			  struct genl_info *info)
+{
+	struct batadv_softif_vlan *vlan;
+	u16 vid;
+
+	if (!info->attrs[BATADV_ATTR_VLANID])
+		return ERR_PTR(-EINVAL);
+
+	vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]);
+
+	vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
+	if (!vlan)
+		return ERR_PTR(-ENOENT);
+
+	return vlan;
+}
+
+/**
+ * batadv_pre_doit() - Prepare batman-adv genl doit request
+ * @ops: requested netlink operation
+ * @skb: Netlink message with request data
+ * @info: receiver information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
+			   struct genl_info *info)
+{
+	struct net *net = genl_info_net(info);
+	struct batadv_hard_iface *hard_iface;
+	struct batadv_priv *bat_priv = NULL;
+	struct batadv_softif_vlan *vlan;
+	struct net_device *soft_iface;
+	u8 user_ptr1_flags;
+	u8 mesh_dep_flags;
+	int ret;
+
+	user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
+	if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1))
+		return -EINVAL;
+
+	mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
+	if (WARN_ON((ops->internal_flags & mesh_dep_flags) &&
+		    (~ops->internal_flags & BATADV_FLAG_NEED_MESH)))
+		return -EINVAL;
+
+	if (ops->internal_flags & BATADV_FLAG_NEED_MESH) {
+		soft_iface = batadv_get_softif_from_info(net, info);
+		if (IS_ERR(soft_iface))
+			return PTR_ERR(soft_iface);
+
+		bat_priv = netdev_priv(soft_iface);
+		info->user_ptr[0] = bat_priv;
+	}
+
+	if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) {
+		hard_iface = batadv_get_hardif_from_info(bat_priv, net, info);
+		if (IS_ERR(hard_iface)) {
+			ret = PTR_ERR(hard_iface);
+			goto err_put_softif;
+		}
+
+		info->user_ptr[1] = hard_iface;
+	}
+
+	if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) {
+		vlan = batadv_get_vlan_from_info(bat_priv, net, info);
+		if (IS_ERR(vlan)) {
+			ret = PTR_ERR(vlan);
+			goto err_put_softif;
+		}
+
+		info->user_ptr[1] = vlan;
+	}
+
+	return 0;
+
+err_put_softif:
+	if (bat_priv)
+		dev_put(bat_priv->soft_iface);
+
+	return ret;
+}
+
+/**
+ * batadv_post_doit() - End batman-adv genl doit request
+ * @ops: requested netlink operation
+ * @skb: Netlink message with request data
+ * @info: receiver information
+ */
+static void batadv_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
+			     struct genl_info *info)
+{
+	struct batadv_hard_iface *hard_iface;
+	struct batadv_softif_vlan *vlan;
+	struct batadv_priv *bat_priv;
+
+	if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF &&
+	    info->user_ptr[1]) {
+		hard_iface = info->user_ptr[1];
+
+		batadv_hardif_put(hard_iface);
+	}
+
+	if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) {
+		vlan = info->user_ptr[1];
+		batadv_softif_vlan_put(vlan);
+	}
+
+	if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) {
+		bat_priv = info->user_ptr[0];
+		dev_put(bat_priv->soft_iface);
+	}
+}
+
+static const struct genl_small_ops batadv_netlink_ops[] = {
+	{
+		.cmd = BATADV_CMD_GET_MESH,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		/* can be retrieved by unprivileged users */
+		.doit = batadv_netlink_get_mesh,
+		.internal_flags = BATADV_FLAG_NEED_MESH,
+	},
+	{
+		.cmd = BATADV_CMD_TP_METER,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.doit = batadv_netlink_tp_meter_start,
+		.internal_flags = BATADV_FLAG_NEED_MESH,
+	},
+	{
+		.cmd = BATADV_CMD_TP_METER_CANCEL,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.doit = batadv_netlink_tp_meter_cancel,
+		.internal_flags = BATADV_FLAG_NEED_MESH,
+	},
+	{
+		.cmd = BATADV_CMD_GET_ROUTING_ALGOS,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_algo_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_HARDIF,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		/* can be retrieved by unprivileged users */
+		.dumpit = batadv_netlink_dump_hardif,
+		.doit = batadv_netlink_get_hardif,
+		.internal_flags = BATADV_FLAG_NEED_MESH |
+				  BATADV_FLAG_NEED_HARDIF,
+	},
+	{
+		.cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_tt_local_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_tt_global_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_ORIGINATORS,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_orig_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_NEIGHBORS,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_hardif_neigh_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_GATEWAYS,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_gw_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_BLA_CLAIM,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_bla_claim_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_BLA_BACKBONE,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_bla_backbone_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_DAT_CACHE,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_dat_cache_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_MCAST_FLAGS,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.dumpit = batadv_mcast_flags_dump,
+	},
+	{
+		.cmd = BATADV_CMD_SET_MESH,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.doit = batadv_netlink_set_mesh,
+		.internal_flags = BATADV_FLAG_NEED_MESH,
+	},
+	{
+		.cmd = BATADV_CMD_SET_HARDIF,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.doit = batadv_netlink_set_hardif,
+		.internal_flags = BATADV_FLAG_NEED_MESH |
+				  BATADV_FLAG_NEED_HARDIF,
+	},
+	{
+		.cmd = BATADV_CMD_GET_VLAN,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		/* can be retrieved by unprivileged users */
+		.doit = batadv_netlink_get_vlan,
+		.internal_flags = BATADV_FLAG_NEED_MESH |
+				  BATADV_FLAG_NEED_VLAN,
+	},
+	{
+		.cmd = BATADV_CMD_SET_VLAN,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.flags = GENL_UNS_ADMIN_PERM,
+		.doit = batadv_netlink_set_vlan,
+		.internal_flags = BATADV_FLAG_NEED_MESH |
+				  BATADV_FLAG_NEED_VLAN,
+	},
+};
+
+struct genl_family batadv_netlink_family __ro_after_init = {
+	.hdrsize = 0,
+	.name = BATADV_NL_NAME,
+	.version = 1,
+	.maxattr = BATADV_ATTR_MAX,
+	.policy = batadv_netlink_policy,
+	.netnsok = true,
+	.pre_doit = batadv_pre_doit,
+	.post_doit = batadv_post_doit,
+	.module = THIS_MODULE,
+	.small_ops = batadv_netlink_ops,
+	.n_small_ops = ARRAY_SIZE(batadv_netlink_ops),
+	.mcgrps = batadv_netlink_mcgrps,
+	.n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
+};
+
+/**
+ * batadv_netlink_register() - register batadv genl netlink family
+ */
+void __init batadv_netlink_register(void)
+{
+	int ret;
+
+	ret = genl_register_family(&batadv_netlink_family);
+	if (ret)
+		pr_warn("unable to register netlink family");
+}
+
+/**
+ * batadv_netlink_unregister() - unregister batadv genl netlink family
+ */
+void batadv_netlink_unregister(void)
+{
+	genl_unregister_family(&batadv_netlink_family);
+}