batman-adv: netlink: add routing_algo query (07a3061e) · Commits · 戴 / test

include/uapi/linux/batman_adv.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -73,6 +73,7 @@ enum batadv_nl_attrs {
		* @BATADV_CMD_GET_MESH_INFO: Query basic information about batman-adv device
		* @BATADV_CMD_TP_METER: Start a tp meter session
		* @BATADV_CMD_TP_METER_CANCEL: Cancel a tp meter session
		* @BATADV_CMD_GET_ROUTING_ALGOS: Query the list of routing algorithms.
		* @__BATADV_CMD_AFTER_LAST: internal use
		* @BATADV_CMD_MAX: highest used command number
		*/
		@@ -81,6 +82,7 @@ enum batadv_nl_commands {
		BATADV_CMD_GET_MESH_INFO,
		BATADV_CMD_TP_METER,
		BATADV_CMD_TP_METER_CANCEL,
		BATADV_CMD_GET_ROUTING_ALGOS,
		/* add new commands above here */
		__BATADV_CMD_AFTER_LAST,
		BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1

net/batman-adv/bat_algo.c

+68 −0

Original line number	Diff line number	Diff line
		@@ -20,12 +20,18 @@
		#include <linux/errno.h>
		#include <linux/list.h>
		#include <linux/moduleparam.h>
		#include <linux/netlink.h>
		#include <linux/printk.h>
		#include <linux/seq_file.h>
		#include <linux/skbuff.h>
		#include <linux/stddef.h>
		#include <linux/string.h>
		#include <net/genetlink.h>
		#include <net/netlink.h>
		#include <uapi/linux/batman_adv.h>

		#include "bat_algo.h"
		#include "netlink.h"

		char batadv_routing_algo[20] = "BATMAN_IV";
		static struct hlist_head batadv_algo_list;
		@@ -138,3 +144,65 @@ static struct kparam_string batadv_param_string_ra = {

		module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra,
		0644);

		/**
		* batadv_algo_dump_entry - fill in information about one supported routing
		* algorithm
		* @msg: netlink message to be sent back
		* @portid: Port to reply to
		* @seq: Sequence number of message
		* @bat_algo_ops: Algorithm to be dumped
		*
		* Return: Error number, or 0 on success
		*/
		static int batadv_algo_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
		struct batadv_algo_ops *bat_algo_ops)
		{
		void *hdr;

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

		if (nla_put_string(msg, BATADV_ATTR_ALGO_NAME, bat_algo_ops->name))
		goto nla_put_failure;

		genlmsg_end(msg, hdr);
		return 0;

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

		/**
		* batadv_algo_dump - fill in information about supported routing
		* algorithms
		* @msg: netlink message to be sent back
		* @cb: Parameters to the netlink request
		*
		* Return: Length of reply message.
		*/
		int batadv_algo_dump(struct sk_buff msg, struct netlink_callback cb)
		{
		int portid = NETLINK_CB(cb->skb).portid;
		struct batadv_algo_ops *bat_algo_ops;
		int skip = cb->args[0];
		int i = 0;

		hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) {
		if (i++ < skip)
		continue;

		if (batadv_algo_dump_entry(msg, portid, cb->nlh->nlmsg_seq,
		bat_algo_ops)) {
		i--;
		break;
		}
		}

		cb->args[0] = i;

		return msg->len;
		}

net/batman-adv/bat_algo.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -22,7 +22,9 @@

		#include <linux/types.h>

		struct netlink_callback;
		struct seq_file;
		struct sk_buff;

		extern char batadv_routing_algo[];
		extern struct list_head batadv_hardif_list;
		@@ -31,5 +33,6 @@ void batadv_algo_init(void);
		int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops);
		int batadv_algo_select(struct batadv_priv bat_priv, char name);
		int batadv_algo_seq_print_text(struct seq_file seq, void offset);
		int batadv_algo_dump(struct sk_buff msg, struct netlink_callback cb);

		#endif /* _NET_BATMAN_ADV_BAT_ALGO_H_ */

net/batman-adv/netlink.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -32,13 +32,14 @@
		#include <net/netlink.h>
		#include <uapi/linux/batman_adv.h>

		#include "bat_algo.h"
		#include "hard-interface.h"
		#include "soft-interface.h"
		#include "tp_meter.h"

		struct sk_buff;

		static struct genl_family batadv_netlink_family = {
		struct genl_family batadv_netlink_family = {
		.id = GENL_ID_GENERATE,
		.hdrsize = 0,
		.name = BATADV_NL_NAME,
		@@ -399,6 +400,12 @@ static struct genl_ops batadv_netlink_ops[] = {
		.policy = batadv_netlink_policy,
		.doit = batadv_netlink_tp_meter_cancel,
		},
		{
		.cmd = BATADV_CMD_GET_ROUTING_ALGOS,
		.flags = GENL_ADMIN_PERM,
		.policy = batadv_netlink_policy,
		.dumpit = batadv_algo_dump,
		},
		};

		/**

net/batman-adv/netlink.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@
		#include "main.h"

		#include <linux/types.h>
		#include <net/genetlink.h>

		void batadv_netlink_register(void);
		void batadv_netlink_unregister(void);
		@@ -29,4 +30,6 @@ int batadv_netlink_tpmeter_notify(struct batadv_priv bat_priv, const u8 dst,
		u8 result, u32 test_time, u64 total_bytes,
		u32 cookie);

		extern struct genl_family batadv_netlink_family;

		#endif /* _NET_BATMAN_ADV_NETLINK_H_ */

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