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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
Simon Wunderlich
parent
f02a478f51
commit
d7129dafcb
@ -88,6 +88,9 @@ enum batadv_tt_client_flags {
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* @BATADV_ATTR_NEIGH_ADDRESS: Neighbour MAC address
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* @BATADV_ATTR_TQ: TQ to neighbour
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* @BATADV_ATTR_THROUGHPUT: Estimated throughput to Neighbour
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* @BATADV_ATTR_BANDWIDTH_UP: Reported uplink bandwidth
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* @BATADV_ATTR_BANDWIDTH_DOWN: Reported downlink bandwidth
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* @BATADV_ATTR_ROUTER: Gateway router MAC address
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* @__BATADV_ATTR_AFTER_LAST: internal use
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* @NUM_BATADV_ATTR: total number of batadv_nl_attrs available
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* @BATADV_ATTR_MAX: highest attribute number currently defined
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@ -120,6 +123,9 @@ enum batadv_nl_attrs {
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BATADV_ATTR_NEIGH_ADDRESS,
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BATADV_ATTR_TQ,
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BATADV_ATTR_THROUGHPUT,
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BATADV_ATTR_BANDWIDTH_UP,
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BATADV_ATTR_BANDWIDTH_DOWN,
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BATADV_ATTR_ROUTER,
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/* add attributes above here, update the policy in netlink.c */
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__BATADV_ATTR_AFTER_LAST,
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NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST,
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@ -139,6 +145,7 @@ enum batadv_nl_attrs {
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* @BATADV_CMD_GET_TRANSTABLE_GLOBAL Query list of global translations
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* @BATADV_CMD_GET_ORIGINATORS: Query list of originators
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* @BATADV_CMD_GET_NEIGHBORS: Query list of neighbours
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* @BATADV_CMD_GET_GATEWAYS: Query list of gateways
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* @__BATADV_CMD_AFTER_LAST: internal use
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* @BATADV_CMD_MAX: highest used command number
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*/
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@ -153,6 +160,7 @@ enum batadv_nl_commands {
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BATADV_CMD_GET_TRANSTABLE_GLOBAL,
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BATADV_CMD_GET_ORIGINATORS,
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BATADV_CMD_GET_NEIGHBORS,
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BATADV_CMD_GET_GATEWAYS,
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/* add new commands above here */
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__BATADV_CMD_AFTER_LAST,
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BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1
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@ -20,6 +20,7 @@
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#include <linux/atomic.h>
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#include <linux/byteorder/generic.h>
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#include <linux/errno.h>
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#include <linux/etherdevice.h>
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#include <linux/fs.h>
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#include <linux/if_ether.h>
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@ -31,6 +32,7 @@
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/netlink.h>
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#include <linux/rculist.h>
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#include <linux/rcupdate.h>
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#include <linux/seq_file.h>
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@ -39,13 +41,17 @@
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#include <linux/spinlock.h>
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#include <linux/stddef.h>
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#include <linux/udp.h>
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#include <net/sock.h>
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#include <uapi/linux/batman_adv.h>
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#include "gateway_common.h"
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#include "hard-interface.h"
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#include "log.h"
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#include "netlink.h"
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#include "originator.h"
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#include "packet.h"
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#include "routing.h"
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#include "soft-interface.h"
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#include "sysfs.h"
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#include "translation-table.h"
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@ -500,6 +506,59 @@ int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
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return 0;
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}
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/**
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* batadv_gw_dump - Dump gateways into a message
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* @msg: Netlink message to dump into
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* @cb: Control block containing additional options
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*
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* Return: Error code, or length of message
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*/
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int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb)
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{
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struct batadv_hard_iface *primary_if = NULL;
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struct net *net = sock_net(cb->skb->sk);
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struct net_device *soft_iface;
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struct batadv_priv *bat_priv;
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int ifindex;
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int ret;
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ifindex = batadv_netlink_get_ifindex(cb->nlh,
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BATADV_ATTR_MESH_IFINDEX);
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if (!ifindex)
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return -EINVAL;
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soft_iface = dev_get_by_index(net, ifindex);
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if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
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ret = -ENODEV;
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goto out;
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}
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bat_priv = netdev_priv(soft_iface);
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primary_if = batadv_primary_if_get_selected(bat_priv);
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if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
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ret = -ENOENT;
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goto out;
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}
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if (!bat_priv->algo_ops->gw.dump) {
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ret = -EOPNOTSUPP;
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goto out;
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}
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bat_priv->algo_ops->gw.dump(msg, cb, bat_priv);
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ret = msg->len;
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out:
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if (primary_if)
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batadv_hardif_put(primary_if);
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if (soft_iface)
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dev_put(soft_iface);
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return ret;
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}
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/**
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* batadv_gw_dhcp_recipient_get - check if a packet is a DHCP message
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* @skb: the packet to check
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@ -23,6 +23,7 @@
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#include <linux/types.h>
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struct batadv_tvlv_gateway_data;
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struct netlink_callback;
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struct seq_file;
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struct sk_buff;
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@ -43,6 +44,7 @@ void batadv_gw_node_put(struct batadv_gw_node *gw_node);
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struct batadv_gw_node *
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batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv);
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int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset);
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int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb);
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bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct sk_buff *skb);
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enum batadv_dhcp_recipient
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batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len,
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@ -38,6 +38,7 @@
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#include <uapi/linux/batman_adv.h>
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#include "bat_algo.h"
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#include "gateway_client.h"
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#include "hard-interface.h"
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#include "originator.h"
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#include "soft-interface.h"
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@ -87,6 +88,9 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
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[BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
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[BATADV_ATTR_TQ] = { .type = NLA_U8 },
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[BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
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[BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
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[BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
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[BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
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};
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/**
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@ -570,6 +574,12 @@ static struct genl_ops batadv_netlink_ops[] = {
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.policy = batadv_netlink_policy,
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.dumpit = batadv_hardif_neigh_dump,
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},
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{
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.cmd = BATADV_CMD_GET_GATEWAYS,
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.flags = GENL_ADMIN_PERM,
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.policy = batadv_netlink_policy,
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.dumpit = batadv_gw_dump,
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},
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};
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/**
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@ -1469,6 +1469,7 @@ struct batadv_algo_orig_ops {
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* @is_eligible: check if a newly discovered GW is a potential candidate for
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* the election as best GW (optional)
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* @print: print the gateway table (optional)
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* @dump: dump gateways to a netlink socket (optional)
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*/
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struct batadv_algo_gw_ops {
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ssize_t (*store_sel_class)(struct batadv_priv *bat_priv, char *buff,
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@ -1480,6 +1481,8 @@ struct batadv_algo_gw_ops {
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struct batadv_orig_node *curr_gw_orig,
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struct batadv_orig_node *orig_node);
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void (*print)(struct batadv_priv *bat_priv, struct seq_file *seq);
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void (*dump)(struct sk_buff *msg, struct netlink_callback *cb,
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struct batadv_priv *priv);
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};
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/**
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