Included changes:

- increase internal module version
 - increase BLA wait periods to 6
 - purge BLA backbone table when it is disabled
 - make sure post function is invoked only if sysfs value is changed
 - simplify code by removing useless NULL checks
 - various corrections to existing kerneldoc
 - minor cleanups
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Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

Antonio Quartulli says:

====================
Included changes:
- increase internal module version
- increase BLA wait periods to 6
- purge BLA backbone table when it is disabled
- make sure post function is invoked only if sysfs value is changed
- simplify code by removing useless NULL checks
- various corrections to existing kerneldoc
- minor cleanups
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/batman-adv.txt

@@ -115,14 +115,17 @@ The "bat0" interface can be used like any  other  regular  inter-
 face.  It needs an IP address which can be either statically con-
 figured or dynamically (by using DHCP or similar services):
 
-# NodeA: ifconfig bat0 192.168.0.1
+# NodeA: ip link set up dev bat0
-# NodeB: ifconfig bat0 192.168.0.2
+# NodeA: ip addr add 192.168.0.1/24 dev bat0
+
+# NodeB: ip link set up dev bat0
+# NodeB: ip addr add 192.168.0.2/24 dev bat0
 # NodeB: ping 192.168.0.1
 
 Note:  In  order to avoid problems remove all IP addresses previ-
 ously assigned to interfaces now used by batman advanced, e.g.
 
-# ifconfig eth0 0.0.0.0
+# ip addr flush dev eth0
 
 
 LOGGING/DEBUGGING

net/batman-adv/bat_iv_ogm.c

@@ -361,7 +361,6 @@ batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface)
 	unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff;
 
 	batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff;
-	batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP;
 	batadv_ogm_packet->ttl = BATADV_TTL;
 }
 
@@ -842,8 +841,6 @@ static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node,
 		   "Forwarding packet: tq: %i, ttl: %i\n",
 		   batadv_ogm_packet->tq, batadv_ogm_packet->ttl);
 
-	/* switch of primaries first hop flag when forwarding */
-	batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP;
 	if (is_single_hop_neigh)
 		batadv_ogm_packet->flags |= BATADV_DIRECTLINK;
 	else

net/batman-adv/bridge_loop_avoidance.c

@@ -1168,6 +1168,26 @@ void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
 	}
 }
 
+/**
+ * batadv_bla_status_update - purge bla interfaces if necessary
+ * @net_dev: the soft interface net device
+ */
+void batadv_bla_status_update(struct net_device *net_dev)
+{
+	struct batadv_priv *bat_priv = netdev_priv(net_dev);
+	struct batadv_hard_iface *primary_if;
+
+	primary_if = batadv_primary_if_get_selected(bat_priv);
+	if (!primary_if)
+		return;
+
+	/* this function already purges everything when bla is disabled,
+	 * so just call that one.
+	 */
+	batadv_bla_update_orig_address(bat_priv, primary_if, primary_if);
+	batadv_hardif_free_ref(primary_if);
+}
+
 /* periodic work to do:
  *  * purge structures when they are too old
  *  * send announcements

net/batman-adv/bridge_loop_avoidance.h

@@ -22,6 +22,7 @@
 
 #include <linux/types.h>
 
+struct net_device;
 struct seq_file;
 struct sk_buff;
 
@@ -42,6 +43,7 @@ int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
 				    struct batadv_hard_iface *primary_if,
 				    struct batadv_hard_iface *oldif);
+void batadv_bla_status_update(struct net_device *net_dev);
 int batadv_bla_init(struct batadv_priv *bat_priv);
 void batadv_bla_free(struct batadv_priv *bat_priv);
 

net/batman-adv/gateway_common.c

@@ -31,27 +31,23 @@
 #include "packet.h"
 
 /**
- * batadv_parse_gw_bandwidth - parse supplied string buffer to extract download
+ * batadv_parse_throughput - parse supplied string buffer to extract throughput
- *  and upload bandwidth information
+ *  information
  * @net_dev: the soft interface net device
  * @buff: string buffer to parse
- * @down: pointer holding the returned download bandwidth information
+ * @description: text shown when throughput string cannot be parsed
- * @up: pointer holding the returned upload bandwidth information
+ * @throughput: pointer holding the returned throughput information
  *
  * Returns false on parse error and true otherwise.
  */
-static bool batadv_parse_gw_bandwidth(struct net_device *net_dev, char *buff,
+static bool batadv_parse_throughput(struct net_device *net_dev, char *buff,
-				      u32 *down, u32 *up)
+				    const char *description, u32 *throughput)
 {
 	enum batadv_bandwidth_units bw_unit_type = BATADV_BW_UNIT_KBIT;
-	char *slash_ptr, *tmp_ptr;
+	u64 lthroughput;
-	u64 ldown, lup;
+	char *tmp_ptr;
 	int ret;
 
-	slash_ptr = strchr(buff, '/');
-	if (slash_ptr)
-		*slash_ptr = 0;
-
 	if (strlen(buff) > 4) {
 		tmp_ptr = buff + strlen(buff) - 4;
 
@@ -63,90 +59,75 @@ static bool batadv_parse_gw_bandwidth(struct net_device *net_dev, char *buff,
 			*tmp_ptr = '\0';
 	}
 
-	ret = kstrtou64(buff, 10, &ldown);
+	ret = kstrtou64(buff, 10, &lthroughput);
 	if (ret) {
 		batadv_err(net_dev,
-			   "Download speed of gateway mode invalid: %s\n",
+			   "Invalid throughput speed for %s: %s\n",
-			   buff);
+			   description, buff);
 		return false;
 	}
 
 	switch (bw_unit_type) {
 	case BATADV_BW_UNIT_MBIT:
 		/* prevent overflow */
-		if (U64_MAX / 10 < ldown) {
+		if (U64_MAX / 10 < lthroughput) {
 			batadv_err(net_dev,
-				   "Download speed of gateway mode too large: %s\n",
+				   "Throughput speed for %s too large: %s\n",
-				   buff);
+				   description, buff);
 			return false;
 		}
 
-		ldown *= 10;
+		lthroughput *= 10;
 		break;
 	case BATADV_BW_UNIT_KBIT:
 	default:
-		ldown = div_u64(ldown, 100);
+		lthroughput = div_u64(lthroughput, 100);
 		break;
 	}
 
-	if (U32_MAX < ldown) {
+	if (lthroughput > U32_MAX) {
 		batadv_err(net_dev,
-			   "Download speed of gateway mode too large: %s\n",
+			   "Throughput speed for %s too large: %s\n",
-			   buff);
+			   description, buff);
 		return false;
 	}
 
-	*down = ldown;
+	*throughput = lthroughput;
+
+	return true;
+}
+
+/**
+ * batadv_parse_gw_bandwidth - parse supplied string buffer to extract download
+ *  and upload bandwidth information
+ * @net_dev: the soft interface net device
+ * @buff: string buffer to parse
+ * @down: pointer holding the returned download bandwidth information
+ * @up: pointer holding the returned upload bandwidth information
+ *
+ * Return: false on parse error and true otherwise.
+ */
+static bool batadv_parse_gw_bandwidth(struct net_device *net_dev, char *buff,
+				      u32 *down, u32 *up)
+{
+	char *slash_ptr;
+	bool ret;
+
+	slash_ptr = strchr(buff, '/');
+	if (slash_ptr)
+		*slash_ptr = 0;
+
+	ret = batadv_parse_throughput(net_dev, buff, "download gateway speed",
+				      down);
+	if (!ret)
+		return false;
 
 	/* we also got some upload info */
 	if (slash_ptr) {
-		bw_unit_type = BATADV_BW_UNIT_KBIT;
+		ret = batadv_parse_throughput(net_dev, slash_ptr + 1,
-
+					      "upload gateway speed", up);
-		if (strlen(slash_ptr + 1) > 4) {
+		if (!ret)
-			tmp_ptr = slash_ptr + 1 - 4 + strlen(slash_ptr + 1);
-
-			if (strncasecmp(tmp_ptr, "mbit", 4) == 0)
-				bw_unit_type = BATADV_BW_UNIT_MBIT;
-
-			if ((strncasecmp(tmp_ptr, "kbit", 4) == 0) ||
-			    (bw_unit_type == BATADV_BW_UNIT_MBIT))
-				*tmp_ptr = '\0';
-		}
-
-		ret = kstrtou64(slash_ptr + 1, 10, &lup);
-		if (ret) {
-			batadv_err(net_dev,
-				   "Upload speed of gateway mode invalid: %s\n",
-				   slash_ptr + 1);
 			return false;
-		}
-
-		switch (bw_unit_type) {
-		case BATADV_BW_UNIT_MBIT:
-			/* prevent overflow */
-			if (U64_MAX / 10 < lup) {
-				batadv_err(net_dev,
-					   "Upload speed of gateway mode too large: %s\n",
-					   slash_ptr + 1);
-				return false;
-			}
-
-			lup *= 10;
-			break;
-		case BATADV_BW_UNIT_KBIT:
-		default:
-			lup = div_u64(lup, 100);
-			break;
-		}
-
-		if (U32_MAX < lup) {
-			batadv_err(net_dev,
-				   "Upload speed of gateway mode too large: %s\n",
-				   slash_ptr + 1);
-			return false;
-		}
-
-		*up = lup;
 	}
 
 	return true;

net/batman-adv/main.c

@@ -747,7 +747,7 @@ static u16 batadv_tvlv_container_list_size(struct batadv_priv *bat_priv)
 static void batadv_tvlv_container_remove(struct batadv_priv *bat_priv,
 					 struct batadv_tvlv_container *tvlv)
 {
-	lockdep_assert_held(&bat_priv->tvlv.handler_list_lock);
+	lockdep_assert_held(&bat_priv->tvlv.container_list_lock);
 
 	if (!tvlv)
 		return;
@@ -1143,15 +1143,14 @@ void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src,
 	struct batadv_unicast_tvlv_packet *unicast_tvlv_packet;
 	struct batadv_tvlv_hdr *tvlv_hdr;
 	struct batadv_orig_node *orig_node;
-	struct sk_buff *skb = NULL;
+	struct sk_buff *skb;
 	unsigned char *tvlv_buff;
 	unsigned int tvlv_len;
 	ssize_t hdr_len = sizeof(*unicast_tvlv_packet);
-	bool ret = false;
 
 	orig_node = batadv_orig_hash_find(bat_priv, dst);
 	if (!orig_node)
-		goto out;
+		return;
 
 	tvlv_len = sizeof(*tvlv_hdr) + tvlv_value_len;
 
@@ -1180,14 +1179,10 @@ void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src,
 	tvlv_buff += sizeof(*tvlv_hdr);
 	memcpy(tvlv_buff, tvlv_value, tvlv_value_len);
 
-	if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP)
+	if (batadv_send_skb_to_orig(skb, orig_node, NULL) == NET_XMIT_DROP)
-		ret = true;
-
-out:
-	if (skb && !ret)
 		kfree_skb(skb);
-	if (orig_node)
+out:
-		batadv_orig_node_free_ref(orig_node);
+	batadv_orig_node_free_ref(orig_node);
 }
 
 /**

net/batman-adv/main.h

@@ -24,7 +24,7 @@
 #define BATADV_DRIVER_DEVICE "batman-adv"
 
 #ifndef BATADV_SOURCE_VERSION
-#define BATADV_SOURCE_VERSION "2015.2"
+#define BATADV_SOURCE_VERSION "2016.0"
 #endif
 
 /* B.A.T.M.A.N. parameters */
@@ -109,7 +109,7 @@
 #define BATADV_MAX_AGGREGATION_MS 100
 
 #define BATADV_BLA_PERIOD_LENGTH	10000	/* 10 seconds */
-#define BATADV_BLA_BACKBONE_TIMEOUT	(BATADV_BLA_PERIOD_LENGTH * 3)
+#define BATADV_BLA_BACKBONE_TIMEOUT	(BATADV_BLA_PERIOD_LENGTH * 6)
 #define BATADV_BLA_CLAIM_TIMEOUT	(BATADV_BLA_PERIOD_LENGTH * 10)
 #define BATADV_BLA_WAIT_PERIODS		3
 

net/batman-adv/network-coding.c

@@ -244,9 +244,7 @@ static void batadv_nc_path_free_ref(struct batadv_nc_path *nc_path)
  */
 static void batadv_nc_packet_free(struct batadv_nc_packet *nc_packet)
 {
-	if (nc_packet->skb)
+	kfree_skb(nc_packet->skb);
-		kfree_skb(nc_packet->skb);
-
 	batadv_nc_path_free_ref(nc_packet->nc_path);
 	kfree(nc_packet);
 }

net/batman-adv/packet.h

@@ -72,8 +72,7 @@ enum batadv_subtype {
  * enum batadv_iv_flags - flags used in B.A.T.M.A.N. IV OGM packets
  * @BATADV_NOT_BEST_NEXT_HOP: flag is set when ogm packet is forwarded and was
  *     previously received from someone else than the best neighbor.
- * @BATADV_PRIMARIES_FIRST_HOP: flag is set when the primary interface address
+ * @BATADV_PRIMARIES_FIRST_HOP: flag unused.
- *     is used, and the packet travels its first hop.
  * @BATADV_DIRECTLINK: flag is for the first hop or if rebroadcasted from a
  *     one hop neighbor on the interface where it was originally received.
  */

net/batman-adv/send.c

@@ -407,8 +407,7 @@ void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface)
 
 static void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet)
 {
-	if (forw_packet->skb)
+	kfree_skb(forw_packet->skb);
-		kfree_skb(forw_packet->skb);
 	if (forw_packet->if_incoming)
 		batadv_hardif_free_ref(forw_packet->if_incoming);
 	if (forw_packet->if_outgoing)

net/batman-adv/sysfs.c

@@ -40,6 +40,7 @@
 #include "distributed-arp-table.h"
 #include "gateway_client.h"
 #include "gateway_common.h"
+#include "bridge_loop_avoidance.h"
 #include "hard-interface.h"
 #include "network-coding.h"
 #include "packet.h"
@@ -241,10 +242,13 @@ ssize_t batadv_show_vlan_##_name(struct kobject *kobj,			\
 
 static int batadv_store_bool_attr(char *buff, size_t count,
 				  struct net_device *net_dev,
-				  const char *attr_name, atomic_t *attr)
+				  const char *attr_name, atomic_t *attr,
+				  bool *changed)
 {
 	int enabled = -1;
 
+	*changed = false;
+
 	if (buff[count - 1] == '\n')
 		buff[count - 1] = '\0';
 
@@ -271,6 +275,8 @@ static int batadv_store_bool_attr(char *buff, size_t count,
 		    atomic_read(attr) == 1 ? "enabled" : "disabled",
 		    enabled == 1 ? "enabled" : "disabled");
 
+	*changed = true;
+
 	atomic_set(attr, (unsigned int)enabled);
 	return count;
 }
@@ -281,11 +287,12 @@ __batadv_store_bool_attr(char *buff, size_t count,
 			 struct attribute *attr,
 			 atomic_t *attr_store, struct net_device *net_dev)
 {
+	bool changed;
 	int ret;
 
 	ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
-				     attr_store);
+				     attr_store, &changed);
-	if (post_func && ret)
+	if (post_func && changed)
 		post_func(net_dev);
 
 	return ret;
@@ -549,7 +556,8 @@ static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 #ifdef CONFIG_BATMAN_ADV_BLA
-BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
+BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR,
+		     batadv_bla_status_update);
 #endif
 #ifdef CONFIG_BATMAN_ADV_DAT
 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,

net/batman-adv/translation-table.c

@@ -3339,7 +3339,10 @@ bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst,
 	bool ret = false;
 
 	vlan = batadv_softif_vlan_get(bat_priv, vid);
-	if (!vlan || !atomic_read(&vlan->ap_isolation))
+	if (!vlan)
+		return false;
+
+	if (!atomic_read(&vlan->ap_isolation))
 		goto out;
 
 	tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid);
@@ -3356,8 +3359,7 @@ bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst,
 	ret = true;
 
 out:
-	if (vlan)
+	batadv_softif_vlan_free_ref(vlan);
-		batadv_softif_vlan_free_ref(vlan);
 	if (tt_global_entry)
 		batadv_tt_global_entry_free_ref(tt_global_entry);
 	if (tt_local_entry)

net/batman-adv/types.h

@@ -223,12 +223,12 @@ struct batadv_orig_bat_iv {
  * @orig: originator ethernet address
  * @ifinfo_list: list for routers per outgoing interface
  * @last_bonding_candidate: pointer to last ifinfo of last used router
- * @batadv_dat_addr_t:  address of the orig node in the distributed hash
+ * @dat_addr: address of the orig node in the distributed hash
  * @last_seen: time when last packet from this node was received
  * @bcast_seqno_reset: time when the broadcast seqno window was reset
  * @mcast_handler_lock: synchronizes mcast-capability and -flag changes
  * @mcast_flags: multicast flags announced by the orig node
- * @mcast_want_all_unsnoop_node: a list node for the
+ * @mcast_want_all_unsnoopables_node: a list node for the
  *  mcast.want_all_unsnoopables list
  * @mcast_want_all_ipv4_node: a list node for the mcast.want_all_ipv4 list
  * @mcast_want_all_ipv6_node: a list node for the mcast.want_all_ipv6 list
@@ -371,9 +371,8 @@ struct batadv_hardif_neigh_node {
  * @ifinfo_lock: lock protecting private ifinfo members and list
  * @if_incoming: pointer to incoming hard interface
  * @last_seen: when last packet via this neighbor was received
- * @last_ttl: last received ttl from this neigh node
+ * @refcount: number of contexts the object is used
  * @rcu: struct used for freeing in an RCU-safe manner
- * @bat_iv: B.A.T.M.A.N. IV private structure
  */
 struct batadv_neigh_node {
 	struct hlist_node list;
@@ -423,13 +422,14 @@ struct batadv_neigh_ifinfo {
 	struct rcu_head rcu;
 };
 
+#ifdef CONFIG_BATMAN_ADV_BLA
+
 /**
  * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression
- * @orig[ETH_ALEN]: mac address of orig node orginating the broadcast
+ * @orig: mac address of orig node orginating the broadcast
  * @crc: crc32 checksum of broadcast payload
  * @entrytime: time when the broadcast packet was received
  */
-#ifdef CONFIG_BATMAN_ADV_BLA
 struct batadv_bcast_duplist_entry {
 	u8 orig[ETH_ALEN];
 	__be32 crc;
@@ -571,9 +571,11 @@ struct batadv_priv_tt {
 	struct delayed_work work;
 };
 
+#ifdef CONFIG_BATMAN_ADV_BLA
+
 /**
  * struct batadv_priv_bla - per mesh interface bridge loope avoidance data
- * @num_requests; number of bla requests in flight
+ * @num_requests: number of bla requests in flight
  * @claim_hash: hash table containing mesh nodes this host has claimed
  * @backbone_hash: hash table containing all detected backbone gateways
  * @bcast_duplist: recently received broadcast packets array (for broadcast
@@ -583,7 +585,6 @@ struct batadv_priv_tt {
  * @claim_dest: local claim data (e.g. claim group)
  * @work: work queue callback item for cleanups & bla announcements
  */
-#ifdef CONFIG_BATMAN_ADV_BLA
 struct batadv_priv_bla {
 	atomic_t num_requests;
 	struct batadv_hashtable *claim_hash;
@@ -597,6 +598,8 @@ struct batadv_priv_bla {
 };
 #endif
 
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+
 /**
  * struct batadv_priv_debug_log - debug logging data
  * @log_buff: buffer holding the logs (ring bufer)
@@ -605,7 +608,6 @@ struct batadv_priv_bla {
  * @lock: lock protecting log_buff, log_start & log_end
  * @queue_wait: log reader's wait queue
  */
-#ifdef CONFIG_BATMAN_ADV_DEBUG
 struct batadv_priv_debug_log {
 	char log_buff[BATADV_LOG_BUF_LEN];
 	unsigned long log_start;
@@ -647,13 +649,14 @@ struct batadv_priv_tvlv {
 	spinlock_t handler_list_lock; /* protects handler_list */
 };
 
+#ifdef CONFIG_BATMAN_ADV_DAT
+
 /**
  * struct batadv_priv_dat - per mesh interface DAT private data
  * @addr: node DAT address
  * @hash: hashtable representing the local ARP cache
  * @work: work queue callback item for cache purging
  */
-#ifdef CONFIG_BATMAN_ADV_DAT
 struct batadv_priv_dat {
 	batadv_dat_addr_t addr;
 	struct batadv_hashtable *hash;
@@ -795,7 +798,7 @@ struct batadv_softif_vlan {
  * @dat: distributed arp table data
  * @mcast: multicast data
  * @network_coding: bool indicating whether network coding is enabled
- * @batadv_priv_nc: network coding data
+ * @nc: network coding data
  */
 struct batadv_priv {
 	atomic_t mesh_state;
@@ -893,6 +896,8 @@ struct batadv_socket_packet {
 	u8 icmp_packet[BATADV_ICMP_MAX_PACKET_SIZE];
 };
 
+#ifdef CONFIG_BATMAN_ADV_BLA
+
 /**
  * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN
  * @orig: originator address of backbone node (mac address of primary iface)
@@ -910,7 +915,6 @@ struct batadv_socket_packet {
  * @refcount: number of contexts the object is used
  * @rcu: struct used for freeing in an RCU-safe manner
  */
-#ifdef CONFIG_BATMAN_ADV_BLA
 struct batadv_bla_backbone_gw {
 	u8 orig[ETH_ALEN];
 	unsigned short vid;
@@ -929,7 +933,7 @@ struct batadv_bla_backbone_gw {
  * struct batadv_bla_claim - claimed non-mesh client structure
  * @addr: mac address of claimed non-mesh client
  * @vid: vlan id this client was detected on
- * @batadv_bla_backbone_gw: pointer to backbone gw claiming this client
+ * @backbone_gw: pointer to backbone gw claiming this client
  * @lasttime: last time we heard of claim (locals only)
  * @hash_entry: hlist node for batadv_priv_bla::claim_hash
  * @refcount: number of contexts the object is used
@@ -1252,8 +1256,6 @@ struct batadv_dat_candidate {
  * struct batadv_tvlv_container - container for tvlv appended to OGMs
  * @list: hlist node for batadv_priv_tvlv::container_list
  * @tvlv_hdr: tvlv header information needed to construct the tvlv
- * @value_len: length of the buffer following this struct which contains
- *  the actual tvlv payload
  * @refcount: number of contexts the object is used
  */
 struct batadv_tvlv_container {