batman-adv: netlink: add gateway table queries

Add BATADV_CMD_GET_GATEWAYS commands, using handlers bat_gw_dump in
batadv_algo_ops. Will always return -EOPNOTSUPP for now, as no
implementations exist yet.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Sven Eckelmann 2016-07-03 13:31:42 +02:00 committed by Simon Wunderlich
parent f02a478f51
commit d7129dafcb
5 changed files with 82 additions and 0 deletions

View file

@ -88,6 +88,9 @@ enum batadv_tt_client_flags {
* @BATADV_ATTR_NEIGH_ADDRESS: Neighbour MAC address
* @BATADV_ATTR_TQ: TQ to neighbour
* @BATADV_ATTR_THROUGHPUT: Estimated throughput to Neighbour
* @BATADV_ATTR_BANDWIDTH_UP: Reported uplink bandwidth
* @BATADV_ATTR_BANDWIDTH_DOWN: Reported downlink bandwidth
* @BATADV_ATTR_ROUTER: Gateway router MAC address
* @__BATADV_ATTR_AFTER_LAST: internal use
* @NUM_BATADV_ATTR: total number of batadv_nl_attrs available
* @BATADV_ATTR_MAX: highest attribute number currently defined
@ -120,6 +123,9 @@ enum batadv_nl_attrs {
BATADV_ATTR_NEIGH_ADDRESS,
BATADV_ATTR_TQ,
BATADV_ATTR_THROUGHPUT,
BATADV_ATTR_BANDWIDTH_UP,
BATADV_ATTR_BANDWIDTH_DOWN,
BATADV_ATTR_ROUTER,
/* add attributes above here, update the policy in netlink.c */
__BATADV_ATTR_AFTER_LAST,
NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST,
@ -139,6 +145,7 @@ enum batadv_nl_attrs {
* @BATADV_CMD_GET_TRANSTABLE_GLOBAL Query list of global translations
* @BATADV_CMD_GET_ORIGINATORS: Query list of originators
* @BATADV_CMD_GET_NEIGHBORS: Query list of neighbours
* @BATADV_CMD_GET_GATEWAYS: Query list of gateways
* @__BATADV_CMD_AFTER_LAST: internal use
* @BATADV_CMD_MAX: highest used command number
*/
@ -153,6 +160,7 @@ enum batadv_nl_commands {
BATADV_CMD_GET_TRANSTABLE_GLOBAL,
BATADV_CMD_GET_ORIGINATORS,
BATADV_CMD_GET_NEIGHBORS,
BATADV_CMD_GET_GATEWAYS,
/* add new commands above here */
__BATADV_CMD_AFTER_LAST,
BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1

View file

@ -20,6 +20,7 @@
#include <linux/atomic.h>
#include <linux/byteorder/generic.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/fs.h>
#include <linux/if_ether.h>
@ -31,6 +32,7 @@
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/seq_file.h>
@ -39,13 +41,17 @@
#include <linux/spinlock.h>
#include <linux/stddef.h>
#include <linux/udp.h>
#include <net/sock.h>
#include <uapi/linux/batman_adv.h>
#include "gateway_common.h"
#include "hard-interface.h"
#include "log.h"
#include "netlink.h"
#include "originator.h"
#include "packet.h"
#include "routing.h"
#include "soft-interface.h"
#include "sysfs.h"
#include "translation-table.h"
@ -500,6 +506,59 @@ int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
return 0;
}
/**
* batadv_gw_dump - Dump gateways into a message
* @msg: Netlink message to dump into
* @cb: Control block containing additional options
*
* Return: Error code, or length of message
*/
int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb)
{
struct batadv_hard_iface *primary_if = NULL;
struct net *net = sock_net(cb->skb->sk);
struct net_device *soft_iface;
struct batadv_priv *bat_priv;
int ifindex;
int ret;
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 || !batadv_softif_is_valid(soft_iface)) {
ret = -ENODEV;
goto out;
}
bat_priv = netdev_priv(soft_iface);
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
ret = -ENOENT;
goto out;
}
if (!bat_priv->algo_ops->gw.dump) {
ret = -EOPNOTSUPP;
goto out;
}
bat_priv->algo_ops->gw.dump(msg, cb, bat_priv);
ret = msg->len;
out:
if (primary_if)
batadv_hardif_put(primary_if);
if (soft_iface)
dev_put(soft_iface);
return ret;
}
/**
* batadv_gw_dhcp_recipient_get - check if a packet is a DHCP message
* @skb: the packet to check

View file

@ -23,6 +23,7 @@
#include <linux/types.h>
struct batadv_tvlv_gateway_data;
struct netlink_callback;
struct seq_file;
struct sk_buff;
@ -43,6 +44,7 @@ void batadv_gw_node_put(struct batadv_gw_node *gw_node);
struct batadv_gw_node *
batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv);
int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset);
int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb);
bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct sk_buff *skb);
enum batadv_dhcp_recipient
batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len,

View file

@ -38,6 +38,7 @@
#include <uapi/linux/batman_adv.h>
#include "bat_algo.h"
#include "gateway_client.h"
#include "hard-interface.h"
#include "originator.h"
#include "soft-interface.h"
@ -87,6 +88,9 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
[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 },
};
/**
@ -570,6 +574,12 @@ static struct genl_ops batadv_netlink_ops[] = {
.policy = batadv_netlink_policy,
.dumpit = batadv_hardif_neigh_dump,
},
{
.cmd = BATADV_CMD_GET_GATEWAYS,
.flags = GENL_ADMIN_PERM,
.policy = batadv_netlink_policy,
.dumpit = batadv_gw_dump,
},
};
/**

View file

@ -1469,6 +1469,7 @@ struct batadv_algo_orig_ops {
* @is_eligible: check if a newly discovered GW is a potential candidate for
* the election as best GW (optional)
* @print: print the gateway table (optional)
* @dump: dump gateways to a netlink socket (optional)
*/
struct batadv_algo_gw_ops {
ssize_t (*store_sel_class)(struct batadv_priv *bat_priv, char *buff,
@ -1480,6 +1481,8 @@ struct batadv_algo_gw_ops {
struct batadv_orig_node *curr_gw_orig,
struct batadv_orig_node *orig_node);
void (*print)(struct batadv_priv *bat_priv, struct seq_file *seq);
void (*dump)(struct sk_buff *msg, struct netlink_callback *cb,
struct batadv_priv *priv);
};
/**