blob: f82c267e1886ee04cb50339d91e20fa559161737 [file] [log] [blame]
Simon Wunderliche19f9752014-01-04 18:04:25 +01001/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00002 *
3 * Marek Lindner, Simon Wunderlich
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
Antonio Quartulliebf38fb2013-11-03 20:40:48 +010015 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000016 */
17
18#include "main.h"
19#include "soft-interface.h"
20#include "hard-interface.h"
Antonio Quartullic384ea32011-06-26 03:37:18 +020021#include "distributed-arp-table.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000022#include "routing.h"
23#include "send.h"
Sven Eckelmannb706b132012-06-10 23:58:51 +020024#include "debugfs.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000025#include "translation-table.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000026#include "hash.h"
27#include "gateway_common.h"
28#include "gateway_client.h"
Sven Eckelmannb706b132012-06-10 23:58:51 +020029#include "sysfs.h"
Antonio Quartulli43676ab2011-04-26 21:31:45 +020030#include "originator.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000031#include <linux/slab.h>
32#include <linux/ethtool.h>
33#include <linux/etherdevice.h>
34#include <linux/if_vlan.h>
Simon Wunderlich23721382012-01-22 20:00:19 +010035#include "bridge_loop_avoidance.h"
Martin Hundebølld353d8d2013-01-25 11:12:38 +010036#include "network-coding.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000037
38
Sven Eckelmann0294ca02012-05-16 20:23:15 +020039static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
40static void batadv_get_drvinfo(struct net_device *dev,
41 struct ethtool_drvinfo *info);
42static u32 batadv_get_msglevel(struct net_device *dev);
43static void batadv_set_msglevel(struct net_device *dev, u32 value);
44static u32 batadv_get_link(struct net_device *dev);
Martin Hundebøllf8214862012-04-20 17:02:45 +020045static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
46static void batadv_get_ethtool_stats(struct net_device *dev,
47 struct ethtool_stats *stats, u64 *data);
48static int batadv_get_sset_count(struct net_device *dev, int stringset);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000049
Sven Eckelmann0294ca02012-05-16 20:23:15 +020050static const struct ethtool_ops batadv_ethtool_ops = {
51 .get_settings = batadv_get_settings,
52 .get_drvinfo = batadv_get_drvinfo,
53 .get_msglevel = batadv_get_msglevel,
54 .set_msglevel = batadv_set_msglevel,
55 .get_link = batadv_get_link,
Martin Hundebøllf8214862012-04-20 17:02:45 +020056 .get_strings = batadv_get_strings,
57 .get_ethtool_stats = batadv_get_ethtool_stats,
58 .get_sset_count = batadv_get_sset_count,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000059};
60
Sven Eckelmann04b482a2012-05-12 02:09:38 +020061int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000062{
63 int result;
64
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +020065 /* TODO: We must check if we can release all references to non-payload
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000066 * data using skb_header_release in our skbs to allow skb_cow_header to
67 * work optimally. This means that those skbs are not allowed to read
68 * or write any data which is before the current position of skb->data
69 * after that call and thus allow other skbs with the same data buffer
70 * to write freely in that area.
71 */
72 result = skb_cow_head(skb, len);
73 if (result < 0)
74 return result;
75
76 skb_push(skb, len);
77 return 0;
78}
79
Sven Eckelmann0294ca02012-05-16 20:23:15 +020080static int batadv_interface_open(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000081{
82 netif_start_queue(dev);
83 return 0;
84}
85
Sven Eckelmann0294ca02012-05-16 20:23:15 +020086static int batadv_interface_release(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000087{
88 netif_stop_queue(dev);
89 return 0;
90}
91
Sven Eckelmann0294ca02012-05-16 20:23:15 +020092static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000093{
Sven Eckelmann56303d32012-06-05 22:31:31 +020094 struct batadv_priv *bat_priv = netdev_priv(dev);
Marek Lindner1c9b0552012-06-23 11:47:53 +020095 struct net_device_stats *stats = &bat_priv->stats;
96
97 stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
98 stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
99 stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
100 stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
101 stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
102 return stats;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000103}
104
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200105static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000106{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200107 struct batadv_priv *bat_priv = netdev_priv(dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000108 struct sockaddr *addr = p;
Def40a3eb32012-09-20 14:56:13 +0200109 uint8_t old_addr[ETH_ALEN];
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000110
111 if (!is_valid_ether_addr(addr->sa_data))
112 return -EADDRNOTAVAIL;
113
Def40a3eb32012-09-20 14:56:13 +0200114 memcpy(old_addr, dev->dev_addr, ETH_ALEN);
115 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
116
Antonio Quartulli015758d2011-07-09 17:52:13 +0200117 /* only modify transtable if it has been initialized before */
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200118 if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) {
Antonio Quartullic018ad32013-06-04 12:11:39 +0200119 batadv_tt_local_remove(bat_priv, old_addr, BATADV_NO_FLAGS,
Sven Eckelmann08c36d32012-05-12 02:09:39 +0200120 "mac address changed", false);
Antonio Quartullic018ad32013-06-04 12:11:39 +0200121 batadv_tt_local_add(dev, addr->sa_data, BATADV_NO_FLAGS,
Antonio Quartulli9464d072013-11-16 12:03:48 +0100122 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000123 }
124
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000125 return 0;
126}
127
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200128static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000129{
130 /* check ranges */
Sven Eckelmann95638772012-05-12 02:09:31 +0200131 if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000132 return -EINVAL;
133
134 dev->mtu = new_mtu;
135
136 return 0;
137}
138
Linus Lüssinga4deee1a2013-05-26 17:56:07 +0200139/**
140 * batadv_interface_set_rx_mode - set the rx mode of a device
141 * @dev: registered network device to modify
142 *
143 * We do not actually need to set any rx filters for the virtual batman
144 * soft interface. However a dummy handler enables a user to set static
145 * multicast listeners for instance.
146 */
147static void batadv_interface_set_rx_mode(struct net_device *dev)
148{
149}
150
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200151static int batadv_interface_tx(struct sk_buff *skb,
152 struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000153{
Antonio Quartullic018ad32013-06-04 12:11:39 +0200154 struct ethhdr *ethhdr;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200155 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
156 struct batadv_hard_iface *primary_if = NULL;
Sven Eckelmann96412692012-06-05 22:31:30 +0200157 struct batadv_bcast_packet *bcast_packet;
Antonio Quartulli293e9332013-05-19 12:55:16 +0200158 __be16 ethertype = htons(ETH_P_BATMAN);
Simon Wunderlich4934ab92012-08-19 20:10:09 +0200159 static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
160 0x00, 0x00};
161 static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
162 0x00, 0x00};
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100163 enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO;
164 uint8_t *dst_hint = NULL, chaddr[ETH_ALEN];
Antonio Quartullic018ad32013-06-04 12:11:39 +0200165 struct vlan_ethhdr *vhdr;
Marek Lindnerbe7af5c2011-09-08 13:12:53 +0200166 unsigned int header_len = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000167 int data_len = skb->len, ret;
Antonio Quartullic384ea32011-06-26 03:37:18 +0200168 unsigned long brd_delay = 1;
Marek Lindnera19d3d82013-05-27 15:33:25 +0800169 bool do_bcast = false, client_added;
Antonio Quartullic018ad32013-06-04 12:11:39 +0200170 unsigned short vid;
171 uint32_t seqno;
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100172 int gw_mode;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000173
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200174 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000175 goto dropped;
176
177 soft_iface->trans_start = jiffies;
Antonio Quartullic018ad32013-06-04 12:11:39 +0200178 vid = batadv_get_vid(skb, 0);
179 ethhdr = (struct ethhdr *)skb->data;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000180
181 switch (ntohs(ethhdr->h_proto)) {
182 case ETH_P_8021Q:
183 vhdr = (struct vlan_ethhdr *)skb->data;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000184
Sven Eckelmann7e071c72012-06-03 22:19:13 +0200185 if (vhdr->h_vlan_encapsulated_proto != ethertype)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000186 break;
187
188 /* fall through */
Antonio Quartulliaf5d4f72012-11-26 00:38:50 +0100189 case ETH_P_BATMAN:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000190 goto dropped;
Simon Wunderlicha7f6ee92012-01-22 20:00:18 +0100191 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000192
Sven Eckelmann08adf152012-05-12 13:38:47 +0200193 if (batadv_bla_tx(bat_priv, skb, vid))
Simon Wunderlich23721382012-01-22 20:00:19 +0100194 goto dropped;
195
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200196 /* skb->data might have been reallocated by batadv_bla_tx() */
197 ethhdr = (struct ethhdr *)skb->data;
198
Antonio Quartullia73105b2011-04-27 14:27:44 +0200199 /* Register the client MAC in the transtable */
Marek Lindnera19d3d82013-05-27 15:33:25 +0800200 if (!is_multicast_ether_addr(ethhdr->h_source)) {
201 client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
Antonio Quartulli9464d072013-11-16 12:03:48 +0100202 vid, skb->skb_iif,
203 skb->mark);
Marek Lindnera19d3d82013-05-27 15:33:25 +0800204 if (!client_added)
205 goto dropped;
206 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000207
Simon Wunderlichb1a8c042012-01-22 20:00:25 +0100208 /* don't accept stp packets. STP does not help in meshes.
209 * better use the bridge loop avoidance ...
Simon Wunderlich4934ab92012-08-19 20:10:09 +0200210 *
211 * The same goes for ECTP sent at least by some Cisco Switches,
212 * it might confuse the mesh when used with bridge loop avoidance.
Simon Wunderlichb1a8c042012-01-22 20:00:25 +0100213 */
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200214 if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
Simon Wunderlichb1a8c042012-01-22 20:00:25 +0100215 goto dropped;
216
Simon Wunderlich4934ab92012-08-19 20:10:09 +0200217 if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
218 goto dropped;
219
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100220 gw_mode = atomic_read(&bat_priv->gw_mode);
Marek Lindnerbe7af5c2011-09-08 13:12:53 +0200221 if (is_multicast_ether_addr(ethhdr->h_dest)) {
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100222 /* if gw mode is off, broadcast every packet */
223 if (gw_mode == BATADV_GW_MODE_OFF) {
224 do_bcast = true;
225 goto send;
Marek Lindnerbe7af5c2011-09-08 13:12:53 +0200226 }
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200227
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100228 dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len,
229 chaddr);
230 /* skb->data may have been modified by
231 * batadv_gw_dhcp_recipient_get()
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200232 */
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100233 ethhdr = (struct ethhdr *)skb->data;
234 /* if gw_mode is on, broadcast any non-DHCP message.
235 * All the DHCP packets are going to be sent as unicast
236 */
237 if (dhcp_rcp == BATADV_DHCP_NO) {
238 do_bcast = true;
239 goto send;
240 }
241
242 if (dhcp_rcp == BATADV_DHCP_TO_CLIENT)
243 dst_hint = chaddr;
244 else if ((gw_mode == BATADV_GW_MODE_SERVER) &&
245 (dhcp_rcp == BATADV_DHCP_TO_SERVER))
246 /* gateways should not forward any DHCP message if
247 * directed to a DHCP server
248 */
249 goto dropped;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000250 }
251
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100252send:
Simon Wunderlichc54f38c92013-07-29 17:56:44 +0200253 batadv_skb_set_priority(skb, 0);
254
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000255 /* ethernet packet should be broadcasted */
256 if (do_bcast) {
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200257 primary_if = batadv_primary_if_get_selected(bat_priv);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200258 if (!primary_if)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000259 goto dropped;
260
Antonio Quartullic384ea32011-06-26 03:37:18 +0200261 /* in case of ARP request, we do not immediately broadcasti the
262 * packet, instead we first wait for DAT to try to retrieve the
263 * correct ARP entry
264 */
265 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
266 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
267
Sven Eckelmann04b482a2012-05-12 02:09:38 +0200268 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000269 goto dropped;
270
Sven Eckelmann96412692012-06-05 22:31:30 +0200271 bcast_packet = (struct batadv_bcast_packet *)skb->data;
Simon Wunderlicha40d9b02013-12-02 20:38:31 +0100272 bcast_packet->version = BATADV_COMPAT_VERSION;
273 bcast_packet->ttl = BATADV_TTL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000274
275 /* batman packet type: broadcast */
Simon Wunderlicha40d9b02013-12-02 20:38:31 +0100276 bcast_packet->packet_type = BATADV_BCAST;
Sven Eckelmann162d5492012-06-28 11:56:52 +0200277 bcast_packet->reserved = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000278
279 /* hw address of first interface is the orig mac because only
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200280 * this mac is known throughout the mesh
281 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000282 memcpy(bcast_packet->orig,
Marek Lindner32ae9b22011-04-20 15:40:58 +0200283 primary_if->net_dev->dev_addr, ETH_ALEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000284
285 /* set broadcast sequence number */
Sven Eckelmannbbb1f902012-07-08 17:13:15 +0200286 seqno = atomic_inc_return(&bat_priv->bcast_seqno);
287 bcast_packet->seqno = htonl(seqno);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000288
Antonio Quartullic384ea32011-06-26 03:37:18 +0200289 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000290
291 /* a copy is stored in the bcast list, therefore removing
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200292 * the original skb.
293 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000294 kfree_skb(skb);
295
296 /* unicast packet */
297 } else {
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100298 /* DHCP packets going to a server will use the GW feature */
299 if (dhcp_rcp == BATADV_DHCP_TO_SERVER) {
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200300 ret = batadv_gw_out_of_range(bat_priv, skb);
Marek Lindnerbe7af5c2011-09-08 13:12:53 +0200301 if (ret)
302 goto dropped;
Linus Lüssinge300d312013-07-03 10:40:00 +0200303 ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100304 } else {
305 if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
306 skb))
307 goto dropped;
Linus Lüssinge300d312013-07-03 10:40:00 +0200308
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100309 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
310
311 ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint,
312 vid);
313 }
Linus Lüssinge300d312013-07-03 10:40:00 +0200314 if (ret == NET_XMIT_DROP)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000315 goto dropped_freed;
316 }
317
Marek Lindner1c9b0552012-06-23 11:47:53 +0200318 batadv_inc_counter(bat_priv, BATADV_CNT_TX);
319 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000320 goto end;
321
322dropped:
323 kfree_skb(skb);
324dropped_freed:
Marek Lindner1c9b0552012-06-23 11:47:53 +0200325 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000326end:
Marek Lindner32ae9b22011-04-20 15:40:58 +0200327 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200328 batadv_hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000329 return NETDEV_TX_OK;
330}
331
Sven Eckelmann04b482a2012-05-12 02:09:38 +0200332void batadv_interface_rx(struct net_device *soft_iface,
Sven Eckelmann56303d32012-06-05 22:31:31 +0200333 struct sk_buff *skb, struct batadv_hard_iface *recv_if,
Antonio Quartulli37135172012-07-05 23:38:30 +0200334 int hdr_size, struct batadv_orig_node *orig_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000335{
Simon Wunderlicha40d9b02013-12-02 20:38:31 +0100336 struct batadv_bcast_packet *batadv_bcast_packet;
Antonio Quartullic018ad32013-06-04 12:11:39 +0200337 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
Antonio Quartulli293e9332013-05-19 12:55:16 +0200338 __be16 ethertype = htons(ETH_P_BATMAN);
Antonio Quartullic018ad32013-06-04 12:11:39 +0200339 struct vlan_ethhdr *vhdr;
340 struct ethhdr *ethhdr;
341 unsigned short vid;
Simon Wunderlich2d3f6cc2012-07-04 20:38:19 +0200342 bool is_bcast;
343
Simon Wunderlicha40d9b02013-12-02 20:38:31 +0100344 batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
345 is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000346
347 /* check if enough space is available for pulling, and pull */
348 if (!pskb_may_pull(skb, hdr_size))
349 goto dropped;
350
351 skb_pull_rcsum(skb, hdr_size);
352 skb_reset_mac_header(skb);
353
Antonio Quartulli55883fd2013-12-23 01:28:05 +0100354 /* clean the netfilter state now that the batman-adv header has been
355 * removed
356 */
357 nf_reset(skb);
358
Antonio Quartulli2b1e2cb2013-12-23 21:43:39 +0100359 vid = batadv_get_vid(skb, 0);
Antonio Quartulli7ed4be92013-04-08 15:08:18 +0200360 ethhdr = eth_hdr(skb);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000361
362 switch (ntohs(ethhdr->h_proto)) {
363 case ETH_P_8021Q:
364 vhdr = (struct vlan_ethhdr *)skb->data;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000365
Sven Eckelmann7e071c72012-06-03 22:19:13 +0200366 if (vhdr->h_vlan_encapsulated_proto != ethertype)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000367 break;
368
369 /* fall through */
Antonio Quartulliaf5d4f72012-11-26 00:38:50 +0100370 case ETH_P_BATMAN:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000371 goto dropped;
372 }
373
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000374 /* skb->dev & skb->pkt_type are set here */
375 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
376 goto dropped;
377 skb->protocol = eth_type_trans(skb, soft_iface);
378
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300379 /* should not be necessary anymore as we use skb_pull_rcsum()
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000380 * TODO: please verify this and remove this TODO
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200381 * -- Dec 21st 2009, Simon Wunderlich
382 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000383
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200384 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000385
Marek Lindner1c9b0552012-06-23 11:47:53 +0200386 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
387 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
388 skb->len + ETH_HLEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000389
390 soft_iface->last_rx = jiffies;
391
Antonio Quartulli74490f92012-11-08 21:55:30 +0100392 /* Let the bridge loop avoidance check the packet. If will
393 * not handle it, we can safely push it up.
394 */
395 if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
396 goto out;
397
Antonio Quartulli37135172012-07-05 23:38:30 +0200398 if (orig_node)
399 batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
Antonio Quartullic018ad32013-06-04 12:11:39 +0200400 ethhdr->h_source, vid);
Antonio Quartulli37135172012-07-05 23:38:30 +0200401
Antonio Quartulli42cb0be2013-11-16 12:03:52 +0100402 if (is_multicast_ether_addr(ethhdr->h_dest)) {
403 /* set the mark on broadcast packets if AP isolation is ON and
404 * the packet is coming from an "isolated" client
405 */
406 if (batadv_vlan_ap_isola_get(bat_priv, vid) &&
407 batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,
408 vid)) {
409 /* save bits in skb->mark not covered by the mask and
410 * apply the mark on the rest
411 */
412 skb->mark &= ~bat_priv->isolation_mark_mask;
413 skb->mark |= bat_priv->isolation_mark;
414 }
415 } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,
416 ethhdr->h_dest, vid)) {
Antonio Quartulli59b699c2011-07-07 15:35:36 +0200417 goto dropped;
Antonio Quartulli42cb0be2013-11-16 12:03:52 +0100418 }
Antonio Quartulli59b699c2011-07-07 15:35:36 +0200419
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000420 netif_rx(skb);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200421 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000422
423dropped:
424 kfree_skb(skb);
425out:
426 return;
427}
428
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200429/**
430 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
431 * possibly free it
432 * @softif_vlan: the vlan object to release
433 */
Antonio Quartulli90f44352013-07-02 11:04:35 +0200434void batadv_softif_vlan_free_ref(struct batadv_softif_vlan *softif_vlan)
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200435{
436 if (atomic_dec_and_test(&softif_vlan->refcount))
437 kfree_rcu(softif_vlan, rcu);
438}
439
440/**
441 * batadv_softif_vlan_get - get the vlan object for a specific vid
442 * @bat_priv: the bat priv with all the soft interface information
443 * @vid: the identifier of the vlan object to retrieve
444 *
445 * Returns the private data of the vlan matching the vid passed as argument or
446 * NULL otherwise. The refcounter of the returned object is incremented by 1.
447 */
Antonio Quartulli90f44352013-07-02 11:04:35 +0200448struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
449 unsigned short vid)
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200450{
451 struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
452
453 rcu_read_lock();
454 hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
455 if (vlan_tmp->vid != vid)
456 continue;
457
458 if (!atomic_inc_not_zero(&vlan_tmp->refcount))
459 continue;
460
461 vlan = vlan_tmp;
462 break;
463 }
464 rcu_read_unlock();
465
466 return vlan;
467}
468
469/**
470 * batadv_create_vlan - allocate the needed resources for a new vlan
471 * @bat_priv: the bat priv with all the soft interface information
472 * @vid: the VLAN identifier
473 *
474 * Returns 0 on success, a negative error otherwise.
475 */
476int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
477{
478 struct batadv_softif_vlan *vlan;
Antonio Quartulli90f44352013-07-02 11:04:35 +0200479 int err;
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200480
481 vlan = batadv_softif_vlan_get(bat_priv, vid);
482 if (vlan) {
483 batadv_softif_vlan_free_ref(vlan);
484 return -EEXIST;
485 }
486
487 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
488 if (!vlan)
489 return -ENOMEM;
490
491 vlan->vid = vid;
492 atomic_set(&vlan->refcount, 1);
493
Antonio Quartullib8cbd812013-07-02 11:04:36 +0200494 atomic_set(&vlan->ap_isolation, 0);
495
Antonio Quartulli90f44352013-07-02 11:04:35 +0200496 err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
497 if (err) {
498 kfree(vlan);
499 return err;
500 }
501
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200502 /* add a new TT local entry. This one will be marked with the NOPURGE
503 * flag
504 */
505 batadv_tt_local_add(bat_priv->soft_iface,
506 bat_priv->soft_iface->dev_addr, vid,
Antonio Quartulli9464d072013-11-16 12:03:48 +0100507 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200508
509 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
510 hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
511 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
512
513 return 0;
514}
515
516/**
517 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
518 * @bat_priv: the bat priv with all the soft interface information
519 * @vlan: the object to remove
520 */
521static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
522 struct batadv_softif_vlan *vlan)
523{
524 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
525 hlist_del_rcu(&vlan->list);
526 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
527
Antonio Quartulli90f44352013-07-02 11:04:35 +0200528 batadv_sysfs_del_vlan(bat_priv, vlan);
529
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200530 /* explicitly remove the associated TT local entry because it is marked
531 * with the NOPURGE flag
532 */
533 batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
534 vlan->vid, "vlan interface destroyed", false);
535
536 batadv_softif_vlan_free_ref(vlan);
537}
538
539/**
540 * batadv_interface_add_vid - ndo_add_vid API implementation
541 * @dev: the netdev of the mesh interface
542 * @vid: identifier of the new vlan
543 *
544 * Set up all the internal structures for handling the new vlan on top of the
545 * mesh interface
546 *
547 * Returns 0 on success or a negative error code in case of failure.
548 */
549static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
550 unsigned short vid)
551{
552 struct batadv_priv *bat_priv = netdev_priv(dev);
553
554 /* only 802.1Q vlans are supported.
555 * batman-adv does not know how to handle other types
556 */
557 if (proto != htons(ETH_P_8021Q))
558 return -EINVAL;
559
560 vid |= BATADV_VLAN_HAS_TAG;
561
562 return batadv_softif_create_vlan(bat_priv, vid);
563}
564
565/**
566 * batadv_interface_kill_vid - ndo_kill_vid API implementation
567 * @dev: the netdev of the mesh interface
568 * @vid: identifier of the deleted vlan
569 *
570 * Destroy all the internal structures used to handle the vlan identified by vid
571 * on top of the mesh interface
572 *
573 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
574 * or -ENOENT if the specified vlan id wasn't registered.
575 */
576static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
577 unsigned short vid)
578{
579 struct batadv_priv *bat_priv = netdev_priv(dev);
580 struct batadv_softif_vlan *vlan;
581
582 /* only 802.1Q vlans are supported. batman-adv does not know how to
583 * handle other types
584 */
585 if (proto != htons(ETH_P_8021Q))
586 return -EINVAL;
587
588 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
589 if (!vlan)
590 return -ENOENT;
591
592 batadv_softif_destroy_vlan(bat_priv, vlan);
593
594 /* finally free the vlan object */
595 batadv_softif_vlan_free_ref(vlan);
596
597 return 0;
598}
599
Sven Eckelmann36c1d152012-08-20 09:03:59 +0200600/* batman-adv network devices have devices nesting below it and are a special
601 * "super class" of normal network devices; split their locks off into a
602 * separate class since they always nest.
603 */
604static struct lock_class_key batadv_netdev_xmit_lock_key;
605static struct lock_class_key batadv_netdev_addr_lock_key;
606
607/**
608 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
609 * @dev: device which owns the tx queue
610 * @txq: tx queue to modify
611 * @_unused: always NULL
612 */
613static void batadv_set_lockdep_class_one(struct net_device *dev,
614 struct netdev_queue *txq,
615 void *_unused)
616{
617 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
618}
619
620/**
621 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
622 * @dev: network device to modify
623 */
624static void batadv_set_lockdep_class(struct net_device *dev)
625{
626 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
627 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
628}
629
630/**
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100631 * batadv_softif_destroy_finish - cleans up the remains of a softif
632 * @work: work queue item
633 *
634 * Free the parts of the soft interface which can not be removed under
635 * rtnl lock (to prevent deadlock situations).
636 */
637static void batadv_softif_destroy_finish(struct work_struct *work)
638{
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200639 struct batadv_softif_vlan *vlan;
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100640 struct batadv_priv *bat_priv;
641 struct net_device *soft_iface;
642
643 bat_priv = container_of(work, struct batadv_priv,
644 cleanup_work);
645 soft_iface = bat_priv->soft_iface;
646
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200647 /* destroy the "untagged" VLAN */
648 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
649 if (vlan) {
650 batadv_softif_destroy_vlan(bat_priv, vlan);
651 batadv_softif_vlan_free_ref(vlan);
652 }
653
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100654 batadv_sysfs_del_meshif(soft_iface);
655
656 rtnl_lock();
657 unregister_netdevice(soft_iface);
658 rtnl_unlock();
659}
660
Sven Eckelmann37130292013-02-11 17:10:22 +0800661/**
662 * batadv_softif_init_late - late stage initialization of soft interface
663 * @dev: registered network device to modify
664 *
665 * Returns error code on failures
666 */
667static int batadv_softif_init_late(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000668{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200669 struct batadv_priv *bat_priv;
Martin Hundebøllee75ed82013-05-23 16:53:03 +0200670 uint32_t random_seqno;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000671 int ret;
Sven Eckelmannd69909d2012-06-03 22:19:20 +0200672 size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000673
Sven Eckelmann37130292013-02-11 17:10:22 +0800674 batadv_set_lockdep_class(dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000675
Sven Eckelmann37130292013-02-11 17:10:22 +0800676 bat_priv = netdev_priv(dev);
677 bat_priv->soft_iface = dev;
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100678 INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish);
Marek Lindner1c9b0552012-06-23 11:47:53 +0200679
680 /* batadv_interface_stats() needs to be available as soon as
681 * register_netdevice() has been called
682 */
683 bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
684 if (!bat_priv->bat_counters)
Sven Eckelmann37130292013-02-11 17:10:22 +0800685 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000686
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000687 atomic_set(&bat_priv->aggregated_ogms, 1);
688 atomic_set(&bat_priv->bonding, 0);
Antonio Quartullifa706552012-11-26 01:27:29 +0100689#ifdef CONFIG_BATMAN_ADV_BLA
Simon Wunderlich23721382012-01-22 20:00:19 +0100690 atomic_set(&bat_priv->bridge_loop_avoidance, 0);
Antonio Quartullifa706552012-11-26 01:27:29 +0100691#endif
Antonio Quartulli33af49a2012-08-08 18:50:57 +0200692#ifdef CONFIG_BATMAN_ADV_DAT
693 atomic_set(&bat_priv->distributed_arp_table, 1);
694#endif
Sven Eckelmanncd646ab2012-06-03 22:19:18 +0200695 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000696 atomic_set(&bat_priv->gw_sel_class, 20);
Marek Lindner414254e2013-04-23 21:39:58 +0800697 atomic_set(&bat_priv->gw.bandwidth_down, 100);
698 atomic_set(&bat_priv->gw.bandwidth_up, 20);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000699 atomic_set(&bat_priv->orig_interval, 1000);
Simon Wunderlichc0398762013-11-13 19:14:48 +0100700 atomic_set(&bat_priv->hop_penalty, 15);
Marek Lindner0c430d02012-12-16 13:53:15 +0800701#ifdef CONFIG_BATMAN_ADV_DEBUG
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000702 atomic_set(&bat_priv->log_level, 0);
Marek Lindner0c430d02012-12-16 13:53:15 +0800703#endif
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000704 atomic_set(&bat_priv->fragmentation, 1);
Marek Lindnera19d3d82013-05-27 15:33:25 +0800705 atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200706 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
707 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000708
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200709 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000710 atomic_set(&bat_priv->bcast_seqno, 1);
Sven Eckelmann807736f2012-07-15 22:26:51 +0200711 atomic_set(&bat_priv->tt.vn, 0);
712 atomic_set(&bat_priv->tt.local_changes, 0);
713 atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
714#ifdef CONFIG_BATMAN_ADV_BLA
715 atomic_set(&bat_priv->bla.num_requests, 0);
716#endif
717 bat_priv->tt.last_changeset = NULL;
718 bat_priv->tt.last_changeset_len = 0;
Antonio Quartullic42edfe2013-11-16 12:03:47 +0100719 bat_priv->isolation_mark = 0;
720 bat_priv->isolation_mark_mask = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000721
Martin Hundebøllee75ed82013-05-23 16:53:03 +0200722 /* randomize initial seqno to avoid collision */
723 get_random_bytes(&random_seqno, sizeof(random_seqno));
724 atomic_set(&bat_priv->frag_seqno, random_seqno);
725
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000726 bat_priv->primary_if = NULL;
727 bat_priv->num_ifaces = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000728
Martin Hundebølld353d8d2013-01-25 11:12:38 +0100729 batadv_nc_init_bat_priv(bat_priv);
730
Sven Eckelmann37130292013-02-11 17:10:22 +0800731 ret = batadv_algo_select(bat_priv, batadv_routing_algo);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000732 if (ret < 0)
Sven Eckelmann37130292013-02-11 17:10:22 +0800733 goto free_bat_counters;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000734
Sven Eckelmann37130292013-02-11 17:10:22 +0800735 ret = batadv_debugfs_add_meshif(dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000736 if (ret < 0)
Sven Eckelmann37130292013-02-11 17:10:22 +0800737 goto free_bat_counters;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000738
Sven Eckelmann37130292013-02-11 17:10:22 +0800739 ret = batadv_mesh_init(dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000740 if (ret < 0)
741 goto unreg_debugfs;
742
Sven Eckelmann37130292013-02-11 17:10:22 +0800743 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000744
745unreg_debugfs:
Sven Eckelmann37130292013-02-11 17:10:22 +0800746 batadv_debugfs_del_meshif(dev);
Marek Lindner1c9b0552012-06-23 11:47:53 +0200747free_bat_counters:
748 free_percpu(bat_priv->bat_counters);
Martin Hundebøllf69ae772013-04-17 21:13:16 +0200749 bat_priv->bat_counters = NULL;
Sven Eckelmann37130292013-02-11 17:10:22 +0800750
751 return ret;
752}
753
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800754/**
755 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
756 * @dev: batadv_soft_interface used as master interface
757 * @slave_dev: net_device which should become the slave interface
758 *
759 * Return 0 if successful or error otherwise.
760 */
761static int batadv_softif_slave_add(struct net_device *dev,
762 struct net_device *slave_dev)
763{
764 struct batadv_hard_iface *hard_iface;
765 int ret = -EINVAL;
766
767 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
768 if (!hard_iface || hard_iface->soft_iface != NULL)
769 goto out;
770
771 ret = batadv_hardif_enable_interface(hard_iface, dev->name);
772
773out:
774 if (hard_iface)
775 batadv_hardif_free_ref(hard_iface);
776 return ret;
777}
778
779/**
780 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
781 * @dev: batadv_soft_interface used as master interface
782 * @slave_dev: net_device which should be removed from the master interface
783 *
784 * Return 0 if successful or error otherwise.
785 */
786static int batadv_softif_slave_del(struct net_device *dev,
787 struct net_device *slave_dev)
788{
789 struct batadv_hard_iface *hard_iface;
790 int ret = -EINVAL;
791
792 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
793
794 if (!hard_iface || hard_iface->soft_iface != dev)
795 goto out;
796
797 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP);
798 ret = 0;
799
800out:
801 if (hard_iface)
802 batadv_hardif_free_ref(hard_iface);
803 return ret;
804}
805
Sven Eckelmann37130292013-02-11 17:10:22 +0800806static const struct net_device_ops batadv_netdev_ops = {
807 .ndo_init = batadv_softif_init_late,
808 .ndo_open = batadv_interface_open,
809 .ndo_stop = batadv_interface_release,
810 .ndo_get_stats = batadv_interface_stats,
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200811 .ndo_vlan_rx_add_vid = batadv_interface_add_vid,
812 .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
Sven Eckelmann37130292013-02-11 17:10:22 +0800813 .ndo_set_mac_address = batadv_interface_set_mac_addr,
814 .ndo_change_mtu = batadv_interface_change_mtu,
Linus Lüssinga4deee1a2013-05-26 17:56:07 +0200815 .ndo_set_rx_mode = batadv_interface_set_rx_mode,
Sven Eckelmann37130292013-02-11 17:10:22 +0800816 .ndo_start_xmit = batadv_interface_tx,
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800817 .ndo_validate_addr = eth_validate_addr,
818 .ndo_add_slave = batadv_softif_slave_add,
819 .ndo_del_slave = batadv_softif_slave_del,
Sven Eckelmann37130292013-02-11 17:10:22 +0800820};
821
822/**
Sven Eckelmannb3246022013-02-11 17:10:23 +0800823 * batadv_softif_free - Deconstructor of batadv_soft_interface
824 * @dev: Device to cleanup and remove
825 */
826static void batadv_softif_free(struct net_device *dev)
827{
828 batadv_debugfs_del_meshif(dev);
829 batadv_mesh_free(dev);
Antonio Quartulli0c501342013-04-19 11:04:52 +0200830
831 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
832 * their tasks. Wait for them all to be finished before freeing the
833 * netdev and its private data (bat_priv)
834 */
835 rcu_barrier();
836
Sven Eckelmannb3246022013-02-11 17:10:23 +0800837 free_netdev(dev);
838}
839
840/**
Sven Eckelmann37130292013-02-11 17:10:22 +0800841 * batadv_softif_init_early - early stage initialization of soft interface
842 * @dev: registered network device to modify
843 */
844static void batadv_softif_init_early(struct net_device *dev)
845{
846 struct batadv_priv *priv = netdev_priv(dev);
847
848 ether_setup(dev);
849
850 dev->netdev_ops = &batadv_netdev_ops;
Sven Eckelmannb3246022013-02-11 17:10:23 +0800851 dev->destructor = batadv_softif_free;
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200852 dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
Sven Eckelmann37130292013-02-11 17:10:22 +0800853 dev->tx_queue_len = 0;
854
855 /* can't call min_mtu, because the needed variables
856 * have not been initialized yet
857 */
858 dev->mtu = ETH_DATA_LEN;
859 /* reserve more space in the skbuff for our header */
Marek Lindner411d6ed2013-05-08 13:31:59 +0800860 dev->hard_header_len = batadv_max_header_len();
Sven Eckelmann37130292013-02-11 17:10:22 +0800861
862 /* generate random address */
863 eth_hw_addr_random(dev);
864
865 SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops);
866
867 memset(priv, 0, sizeof(*priv));
868}
869
870struct net_device *batadv_softif_create(const char *name)
871{
872 struct net_device *soft_iface;
873 int ret;
874
875 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
876 batadv_softif_init_early);
877 if (!soft_iface)
878 return NULL;
879
Sven Eckelmanna4ac28c2013-02-11 17:10:26 +0800880 soft_iface->rtnl_link_ops = &batadv_link_ops;
881
Sven Eckelmann37130292013-02-11 17:10:22 +0800882 ret = register_netdevice(soft_iface);
883 if (ret < 0) {
884 pr_err("Unable to register the batman interface '%s': %i\n",
885 name, ret);
886 free_netdev(soft_iface);
887 return NULL;
888 }
889
890 return soft_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000891}
892
Marek Lindnere07932a2013-02-11 17:10:25 +0800893/**
894 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
895 * @soft_iface: the to-be-removed batman-adv interface
896 */
897void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000898{
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100899 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
900
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100901 queue_work(batadv_event_workqueue, &bat_priv->cleanup_work);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000902}
903
Sven Eckelmanna4ac28c2013-02-11 17:10:26 +0800904/**
905 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
906 * @soft_iface: the to-be-removed batman-adv interface
907 * @head: list pointer
908 */
909static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
910 struct list_head *head)
911{
912 struct batadv_hard_iface *hard_iface;
913
914 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
915 if (hard_iface->soft_iface == soft_iface)
916 batadv_hardif_disable_interface(hard_iface,
917 BATADV_IF_CLEANUP_KEEP);
918 }
919
920 batadv_sysfs_del_meshif(soft_iface);
921 unregister_netdevice_queue(soft_iface, head);
922}
923
Sven Eckelmann04b482a2012-05-12 02:09:38 +0200924int batadv_softif_is_valid(const struct net_device *net_dev)
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000925{
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200926 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000927 return 1;
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000928
929 return 0;
930}
931
Sven Eckelmanna4ac28c2013-02-11 17:10:26 +0800932struct rtnl_link_ops batadv_link_ops __read_mostly = {
933 .kind = "batadv",
934 .priv_size = sizeof(struct batadv_priv),
935 .setup = batadv_softif_init_early,
936 .dellink = batadv_softif_destroy_netlink,
937};
938
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000939/* ethtool */
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200940static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000941{
942 cmd->supported = 0;
943 cmd->advertising = 0;
David Decotigny70739492011-04-27 18:32:40 +0000944 ethtool_cmd_speed_set(cmd, SPEED_10);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000945 cmd->duplex = DUPLEX_FULL;
946 cmd->port = PORT_TP;
947 cmd->phy_address = 0;
948 cmd->transceiver = XCVR_INTERNAL;
949 cmd->autoneg = AUTONEG_DISABLE;
950 cmd->maxtxpkt = 0;
951 cmd->maxrxpkt = 0;
952
953 return 0;
954}
955
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200956static void batadv_get_drvinfo(struct net_device *dev,
957 struct ethtool_drvinfo *info)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000958{
Jiri Pirko7826d432013-01-06 00:44:26 +0000959 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
960 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
961 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
962 strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000963}
964
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200965static u32 batadv_get_msglevel(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000966{
967 return -EOPNOTSUPP;
968}
969
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200970static void batadv_set_msglevel(struct net_device *dev, u32 value)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000971{
972}
973
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200974static u32 batadv_get_link(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000975{
976 return 1;
977}
Martin Hundebøllf8214862012-04-20 17:02:45 +0200978
979/* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
980 * Declare each description string in struct.name[] to get fixed sized buffer
981 * and compile time checking for strings longer than ETH_GSTRING_LEN.
982 */
983static const struct {
984 const char name[ETH_GSTRING_LEN];
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200985} batadv_counters_strings[] = {
Marek Lindner1c9b0552012-06-23 11:47:53 +0200986 { "tx" },
987 { "tx_bytes" },
988 { "tx_dropped" },
989 { "rx" },
990 { "rx_bytes" },
Martin Hundebøllf8214862012-04-20 17:02:45 +0200991 { "forward" },
992 { "forward_bytes" },
993 { "mgmt_tx" },
994 { "mgmt_tx_bytes" },
995 { "mgmt_rx" },
996 { "mgmt_rx_bytes" },
Martin Hundebøllee75ed82013-05-23 16:53:03 +0200997 { "frag_tx" },
998 { "frag_tx_bytes" },
Martin Hundebøll610bfc6bc2013-05-23 16:53:02 +0200999 { "frag_rx" },
1000 { "frag_rx_bytes" },
1001 { "frag_fwd" },
1002 { "frag_fwd_bytes" },
Martin Hundebøllf8214862012-04-20 17:02:45 +02001003 { "tt_request_tx" },
1004 { "tt_request_rx" },
1005 { "tt_response_tx" },
1006 { "tt_response_rx" },
1007 { "tt_roam_adv_tx" },
1008 { "tt_roam_adv_rx" },
Martin Hundebøll4046b242012-04-20 17:02:45 +02001009#ifdef CONFIG_BATMAN_ADV_DAT
1010 { "dat_get_tx" },
1011 { "dat_get_rx" },
1012 { "dat_put_tx" },
1013 { "dat_put_rx" },
1014 { "dat_cached_reply_tx" },
1015#endif
Martin Hundebøll3c12de92013-01-25 11:12:41 +01001016#ifdef CONFIG_BATMAN_ADV_NC
1017 { "nc_code" },
1018 { "nc_code_bytes" },
1019 { "nc_recode" },
1020 { "nc_recode_bytes" },
Martin Hundebøll612d2b42013-01-25 11:12:42 +01001021 { "nc_buffer" },
Martin Hundebøll2df52782013-01-25 11:12:43 +01001022 { "nc_decode" },
1023 { "nc_decode_bytes" },
1024 { "nc_decode_failed" },
1025 { "nc_sniffed" },
Martin Hundebøll3c12de92013-01-25 11:12:41 +01001026#endif
Martin Hundebøllf8214862012-04-20 17:02:45 +02001027};
1028
1029static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
1030 uint8_t *data)
1031{
1032 if (stringset == ETH_SS_STATS)
Sven Eckelmann0294ca02012-05-16 20:23:15 +02001033 memcpy(data, batadv_counters_strings,
1034 sizeof(batadv_counters_strings));
Martin Hundebøllf8214862012-04-20 17:02:45 +02001035}
1036
1037static void batadv_get_ethtool_stats(struct net_device *dev,
1038 struct ethtool_stats *stats,
1039 uint64_t *data)
1040{
Sven Eckelmann56303d32012-06-05 22:31:31 +02001041 struct batadv_priv *bat_priv = netdev_priv(dev);
Martin Hundebøllf8214862012-04-20 17:02:45 +02001042 int i;
1043
Sven Eckelmannd69909d2012-06-03 22:19:20 +02001044 for (i = 0; i < BATADV_CNT_NUM; i++)
Martin Hundebøllf8214862012-04-20 17:02:45 +02001045 data[i] = batadv_sum_counter(bat_priv, i);
1046}
1047
1048static int batadv_get_sset_count(struct net_device *dev, int stringset)
1049{
1050 if (stringset == ETH_SS_STATS)
Sven Eckelmannd69909d2012-06-03 22:19:20 +02001051 return BATADV_CNT_NUM;
Martin Hundebøllf8214862012-04-20 17:02:45 +02001052
1053 return -EOPNOTSUPP;
1054}