batman-adv: add B.A.T.M.A.N. IV bat_{orig, neigh}_dump implementations (024f99cb) · Commits · e / devices / android_kernel_teracube_2e

include/uapi/linux/batman_adv.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -85,6 +85,8 @@ enum batadv_tt_client_flags {
		* @BATADV_ATTR_TT_FLAGS: Translation table client flags
		* @BATADV_ATTR_FLAG_BEST: Flags indicating entry is the best
		* @BATADV_ATTR_LAST_SEEN_MSECS: Time in milliseconds since last seen
		* @BATADV_ATTR_NEIGH_ADDRESS: Neighbour MAC address
		* @BATADV_ATTR_TQ: TQ to neighbour
		* @__BATADV_ATTR_AFTER_LAST: internal use
		* @NUM_BATADV_ATTR: total number of batadv_nl_attrs available
		* @BATADV_ATTR_MAX: highest attribute number currently defined
		@@ -114,6 +116,8 @@ enum batadv_nl_attrs {
		BATADV_ATTR_TT_FLAGS,
		BATADV_ATTR_FLAG_BEST,
		BATADV_ATTR_LAST_SEEN_MSECS,
		BATADV_ATTR_NEIGH_ADDRESS,
		BATADV_ATTR_TQ,
		/* add attributes above here, update the policy in netlink.c */
		__BATADV_ATTR_AFTER_LAST,
		NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST,

net/batman-adv/bat_iv_ogm.c

+366 −0

Original line number	Diff line number	Diff line
		@@ -35,6 +35,7 @@
		#include <linux/list.h>
		#include <linux/lockdep.h>
		#include <linux/netdevice.h>
		#include <linux/netlink.h>
		#include <linux/pkt_sched.h>
		#include <linux/printk.h>
		#include <linux/random.h>
		@@ -48,6 +49,9 @@
		#include <linux/string.h>
		#include <linux/types.h>
		#include <linux/workqueue.h>
		#include <net/genetlink.h>
		#include <net/netlink.h>
		#include <uapi/linux/batman_adv.h>

		#include "bat_algo.h"
		#include "bitarray.h"
		@@ -55,6 +59,7 @@
		#include "hard-interface.h"
		#include "hash.h"
		#include "log.h"
		#include "netlink.h"
		#include "network-coding.h"
		#include "originator.h"
		#include "packet.h"
		@@ -1947,6 +1952,235 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv,
		seq_puts(seq, "No batman nodes in range ...\n");
		}

		/**
		* batadv_iv_ogm_neigh_get_tq_avg - Get the TQ average for a neighbour on a
		* given outgoing interface.
		* @neigh_node: Neighbour of interest
		* @if_outgoing: Outgoing interface of interest
		* @tq_avg: Pointer of where to store the TQ average
		*
		* Return: False if no average TQ available, otherwise true.
		*/
		static bool
		batadv_iv_ogm_neigh_get_tq_avg(struct batadv_neigh_node *neigh_node,
		struct batadv_hard_iface *if_outgoing,
		u8 *tq_avg)
		{
		struct batadv_neigh_ifinfo *n_ifinfo;

		n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
		if (!n_ifinfo)
		return false;

		*tq_avg = n_ifinfo->bat_iv.tq_avg;
		batadv_neigh_ifinfo_put(n_ifinfo);

		return true;
		}

		/**
		* batadv_iv_ogm_orig_dump_subentry - Dump an originator subentry into a
		* message
		* @msg: Netlink message to dump into
		* @portid: Port making netlink request
		* @seq: Sequence number of netlink message
		* @bat_priv: The bat priv with all the soft interface information
		* @if_outgoing: Limit dump to entries with this outgoing interface
		* @orig_node: Originator to dump
		* @neigh_node: Single hops neighbour
		* @best: Is the best originator
		*
		* Return: Error code, or 0 on success
		*/
		static int
		batadv_iv_ogm_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
		struct batadv_priv *bat_priv,
		struct batadv_hard_iface *if_outgoing,
		struct batadv_orig_node *orig_node,
		struct batadv_neigh_node *neigh_node,
		bool best)
		{
		void *hdr;
		u8 tq_avg;
		unsigned int last_seen_msecs;

		last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen);

		if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node, if_outgoing, &tq_avg))
		return 0;

		if (if_outgoing != BATADV_IF_DEFAULT &&
		if_outgoing != neigh_node->if_incoming)
		return 0;

		hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
		NLM_F_MULTI, BATADV_CMD_GET_ORIGINATORS);
		if (!hdr)
		return -ENOBUFS;

		if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
		orig_node->orig) \|\|
		nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
		neigh_node->addr) \|\|
		nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
		neigh_node->if_incoming->net_dev->ifindex) \|\|
		nla_put_u8(msg, BATADV_ATTR_TQ, tq_avg) \|\|
		nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,
		last_seen_msecs))
		goto nla_put_failure;

		if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST))
		goto nla_put_failure;

		genlmsg_end(msg, hdr);
		return 0;

		nla_put_failure:
		genlmsg_cancel(msg, hdr);
		return -EMSGSIZE;
		}

		/**
		* batadv_iv_ogm_orig_dump_entry - Dump an originator entry into a message
		* @msg: Netlink message to dump into
		* @portid: Port making netlink request
		* @seq: Sequence number of netlink message
		* @bat_priv: The bat priv with all the soft interface information
		* @if_outgoing: Limit dump to entries with this outgoing interface
		* @orig_node: Originator to dump
		* @sub_s: Number of sub entries to skip
		*
		* This function assumes the caller holds rcu_read_lock().
		*
		* Return: Error code, or 0 on success
		*/
		static int
		batadv_iv_ogm_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
		struct batadv_priv *bat_priv,
		struct batadv_hard_iface *if_outgoing,
		struct batadv_orig_node orig_node, int sub_s)
		{
		struct batadv_neigh_node *neigh_node_best;
		struct batadv_neigh_node *neigh_node;
		int sub = 0;
		bool best;
		u8 tq_avg_best;

		neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing);
		if (!neigh_node_best)
		goto out;

		if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node_best, if_outgoing,
		&tq_avg_best))
		goto out;

		if (tq_avg_best == 0)
		goto out;

		hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
		if (sub++ < *sub_s)
		continue;

		best = (neigh_node == neigh_node_best);

		if (batadv_iv_ogm_orig_dump_subentry(msg, portid, seq,
		bat_priv, if_outgoing,
		orig_node, neigh_node,
		best)) {
		batadv_neigh_node_put(neigh_node_best);

		*sub_s = sub - 1;
		return -EMSGSIZE;
		}
		}

		out:
		if (neigh_node_best)
		batadv_neigh_node_put(neigh_node_best);

		*sub_s = 0;
		return 0;
		}

		/**
		* batadv_iv_ogm_orig_dump_bucket - Dump an originator bucket into a
		* message
		* @msg: Netlink message to dump into
		* @portid: Port making netlink request
		* @seq: Sequence number of netlink message
		* @bat_priv: The bat priv with all the soft interface information
		* @if_outgoing: Limit dump to entries with this outgoing interface
		* @head: Bucket to be dumped
		* @idx_s: Number of entries to be skipped
		* @sub: Number of sub entries to be skipped
		*
		* Return: Error code, or 0 on success
		*/
		static int
		batadv_iv_ogm_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
		struct batadv_priv *bat_priv,
		struct batadv_hard_iface *if_outgoing,
		struct hlist_head head, int idx_s, int *sub)
		{
		struct batadv_orig_node *orig_node;
		int idx = 0;

		rcu_read_lock();
		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
		if (idx++ < *idx_s)
		continue;

		if (batadv_iv_ogm_orig_dump_entry(msg, portid, seq, bat_priv,
		if_outgoing, orig_node,
		sub)) {
		rcu_read_unlock();
		*idx_s = idx - 1;
		return -EMSGSIZE;
		}
		}
		rcu_read_unlock();

		*idx_s = 0;
		*sub = 0;
		return 0;
		}

		/**
		* batadv_iv_ogm_orig_dump - Dump the originators into a message
		* @msg: Netlink message to dump into
		* @cb: Control block containing additional options
		* @bat_priv: The bat priv with all the soft interface information
		* @if_outgoing: Limit dump to entries with this outgoing interface
		*/
		static void
		batadv_iv_ogm_orig_dump(struct sk_buff msg, struct netlink_callback cb,
		struct batadv_priv *bat_priv,
		struct batadv_hard_iface *if_outgoing)
		{
		struct batadv_hashtable *hash = bat_priv->orig_hash;
		struct hlist_head *head;
		int bucket = cb->args[0];
		int idx = cb->args[1];
		int sub = cb->args[2];
		int portid = NETLINK_CB(cb->skb).portid;

		while (bucket < hash->size) {
		head = &hash->table[bucket];

		if (batadv_iv_ogm_orig_dump_bucket(msg, portid,
		cb->nlh->nlmsg_seq,
		bat_priv, if_outgoing, head,
		&idx, &sub))
		break;

		bucket++;
		}

		cb->args[0] = bucket;
		cb->args[1] = idx;
		cb->args[2] = sub;
		}

		/**
		* batadv_iv_hardif_neigh_print - print a single hop neighbour node
		* @seq: neighbour table seq_file struct
		@@ -2043,6 +2277,136 @@ static bool batadv_iv_ogm_neigh_diff(struct batadv_neigh_node *neigh1,
		return ret;
		}

		/**
		* batadv_iv_ogm_neigh_dump_neigh - Dump a neighbour into a netlink message
		* @msg: Netlink message to dump into
		* @portid: Port making netlink request
		* @seq: Sequence number of netlink message
		* @hardif_neigh: Neighbour to be dumped
		*
		* Return: Error code, or 0 on success
		*/
		static int
		batadv_iv_ogm_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq,
		struct batadv_hardif_neigh_node *hardif_neigh)
		{
		void *hdr;
		unsigned int last_seen_msecs;

		last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen);

		hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
		NLM_F_MULTI, BATADV_CMD_GET_NEIGHBORS);
		if (!hdr)
		return -ENOBUFS;

		if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
		hardif_neigh->addr) \|\|
		nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
		hardif_neigh->if_incoming->net_dev->ifindex) \|\|
		nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,
		last_seen_msecs))
		goto nla_put_failure;

		genlmsg_end(msg, hdr);
		return 0;

		nla_put_failure:
		genlmsg_cancel(msg, hdr);
		return -EMSGSIZE;
		}

		/**
		* batadv_iv_ogm_neigh_dump_hardif - Dump the neighbours of a hard interface
		* into a message
		* @msg: Netlink message to dump into
		* @portid: Port making netlink request
		* @seq: Sequence number of netlink message
		* @bat_priv: The bat priv with all the soft interface information
		* @hard_iface: Hard interface to dump the neighbours for
		* @idx_s: Number of entries to skip
		*
		* This function assumes the caller holds rcu_read_lock().
		*
		* Return: Error code, or 0 on success
		*/
		static int
		batadv_iv_ogm_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq,
		struct batadv_priv *bat_priv,
		struct batadv_hard_iface *hard_iface,
		int *idx_s)
		{
		struct batadv_hardif_neigh_node *hardif_neigh;
		int idx = 0;

		hlist_for_each_entry_rcu(hardif_neigh,
		&hard_iface->neigh_list, list) {
		if (idx++ < *idx_s)
		continue;

		if (batadv_iv_ogm_neigh_dump_neigh(msg, portid, seq,
		hardif_neigh)) {
		*idx_s = idx - 1;
		return -EMSGSIZE;
		}
		}

		*idx_s = 0;
		return 0;
		}

		/**
		* batadv_iv_ogm_neigh_dump - Dump the neighbours into a message
		* @msg: Netlink message to dump into
		* @cb: Control block containing additional options
		* @bat_priv: The bat priv with all the soft interface information
		* @single_hardif: Limit dump to this hard interfaace
		*/
		static void
		batadv_iv_ogm_neigh_dump(struct sk_buff msg, struct netlink_callback cb,
		struct batadv_priv *bat_priv,
		struct batadv_hard_iface *single_hardif)
		{
		struct batadv_hard_iface *hard_iface;
		int i_hardif = 0;
		int i_hardif_s = cb->args[0];
		int idx = cb->args[1];
		int portid = NETLINK_CB(cb->skb).portid;

		rcu_read_lock();
		if (single_hardif) {
		if (i_hardif_s == 0) {
		if (batadv_iv_ogm_neigh_dump_hardif(msg, portid,
		cb->nlh->nlmsg_seq,
		bat_priv,
		single_hardif,
		&idx) == 0)
		i_hardif++;
		}
		} else {
		list_for_each_entry_rcu(hard_iface, &batadv_hardif_list,
		list) {
		if (hard_iface->soft_iface != bat_priv->soft_iface)
		continue;

		if (i_hardif++ < i_hardif_s)
		continue;

		if (batadv_iv_ogm_neigh_dump_hardif(msg, portid,
		cb->nlh->nlmsg_seq,
		bat_priv,
		hard_iface, &idx)) {
		i_hardif--;
		break;
		}
		}
		}
		rcu_read_unlock();

		cb->args[0] = i_hardif;
		cb->args[1] = idx;
		}

		/**
		* batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors
		* @neigh1: the first neighbor object of the comparison
		@@ -2330,9 +2694,11 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
		.cmp = batadv_iv_ogm_neigh_cmp,
		.is_similar_or_better = batadv_iv_ogm_neigh_is_sob,
		.print = batadv_iv_neigh_print,
		.dump = batadv_iv_ogm_neigh_dump,
		},
		.orig = {
		.print = batadv_iv_ogm_orig_print,
		.dump = batadv_iv_ogm_orig_dump,
		.free = batadv_iv_ogm_orig_free,
		.add_if = batadv_iv_ogm_orig_add_if,
		.del_if = batadv_iv_ogm_orig_del_if,

net/batman-adv/netlink.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -84,6 +84,8 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
		[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 },
		};

		/**