blob: 5467955eb27c6c3e069db480f8a0ebc97fcaf107 [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>
Linus Lüssing1d8ab8d2014-02-15 17:47:52 +010035#include "multicast.h"
Simon Wunderlich23721382012-01-22 20:00:19 +010036#include "bridge_loop_avoidance.h"
Martin Hundebølld353d8d2013-01-25 11:12:38 +010037#include "network-coding.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000038
39
Sven Eckelmann0294ca02012-05-16 20:23:15 +020040static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
41static void batadv_get_drvinfo(struct net_device *dev,
42 struct ethtool_drvinfo *info);
43static u32 batadv_get_msglevel(struct net_device *dev);
44static void batadv_set_msglevel(struct net_device *dev, u32 value);
45static u32 batadv_get_link(struct net_device *dev);
Martin Hundebøllf8214862012-04-20 17:02:45 +020046static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
47static void batadv_get_ethtool_stats(struct net_device *dev,
48 struct ethtool_stats *stats, u64 *data);
49static int batadv_get_sset_count(struct net_device *dev, int stringset);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000050
Sven Eckelmann0294ca02012-05-16 20:23:15 +020051static const struct ethtool_ops batadv_ethtool_ops = {
52 .get_settings = batadv_get_settings,
53 .get_drvinfo = batadv_get_drvinfo,
54 .get_msglevel = batadv_get_msglevel,
55 .set_msglevel = batadv_set_msglevel,
56 .get_link = batadv_get_link,
Martin Hundebøllf8214862012-04-20 17:02:45 +020057 .get_strings = batadv_get_strings,
58 .get_ethtool_stats = batadv_get_ethtool_stats,
59 .get_sset_count = batadv_get_sset_count,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000060};
61
Sven Eckelmann04b482a2012-05-12 02:09:38 +020062int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000063{
64 int result;
65
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +020066 /* TODO: We must check if we can release all references to non-payload
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000067 * data using skb_header_release in our skbs to allow skb_cow_header to
68 * work optimally. This means that those skbs are not allowed to read
69 * or write any data which is before the current position of skb->data
70 * after that call and thus allow other skbs with the same data buffer
71 * to write freely in that area.
72 */
73 result = skb_cow_head(skb, len);
74 if (result < 0)
75 return result;
76
77 skb_push(skb, len);
78 return 0;
79}
80
Sven Eckelmann0294ca02012-05-16 20:23:15 +020081static int batadv_interface_open(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000082{
83 netif_start_queue(dev);
84 return 0;
85}
86
Sven Eckelmann0294ca02012-05-16 20:23:15 +020087static int batadv_interface_release(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000088{
89 netif_stop_queue(dev);
90 return 0;
91}
92
Sven Eckelmann0294ca02012-05-16 20:23:15 +020093static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000094{
Sven Eckelmann56303d32012-06-05 22:31:31 +020095 struct batadv_priv *bat_priv = netdev_priv(dev);
Marek Lindner1c9b0552012-06-23 11:47:53 +020096 struct net_device_stats *stats = &bat_priv->stats;
97
98 stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
99 stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
100 stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
101 stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
102 stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
103 return stats;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000104}
105
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200106static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000107{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200108 struct batadv_priv *bat_priv = netdev_priv(dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000109 struct sockaddr *addr = p;
Def40a3eb32012-09-20 14:56:13 +0200110 uint8_t old_addr[ETH_ALEN];
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000111
112 if (!is_valid_ether_addr(addr->sa_data))
113 return -EADDRNOTAVAIL;
114
Antonio Quartulli8fdd0152014-01-22 00:42:11 +0100115 ether_addr_copy(old_addr, dev->dev_addr);
116 ether_addr_copy(dev->dev_addr, addr->sa_data);
Def40a3eb32012-09-20 14:56:13 +0200117
Antonio Quartulli015758d2011-07-09 17:52:13 +0200118 /* only modify transtable if it has been initialized before */
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200119 if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) {
Antonio Quartullic018ad32013-06-04 12:11:39 +0200120 batadv_tt_local_remove(bat_priv, old_addr, BATADV_NO_FLAGS,
Sven Eckelmann08c36d32012-05-12 02:09:39 +0200121 "mac address changed", false);
Antonio Quartullic018ad32013-06-04 12:11:39 +0200122 batadv_tt_local_add(dev, addr->sa_data, BATADV_NO_FLAGS,
Antonio Quartulli9464d072013-11-16 12:03:48 +0100123 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000124 }
125
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000126 return 0;
127}
128
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200129static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000130{
131 /* check ranges */
Sven Eckelmann95638772012-05-12 02:09:31 +0200132 if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000133 return -EINVAL;
134
135 dev->mtu = new_mtu;
136
137 return 0;
138}
139
Linus Lüssinga4deee1a2013-05-26 17:56:07 +0200140/**
141 * batadv_interface_set_rx_mode - set the rx mode of a device
142 * @dev: registered network device to modify
143 *
144 * We do not actually need to set any rx filters for the virtual batman
145 * soft interface. However a dummy handler enables a user to set static
146 * multicast listeners for instance.
147 */
148static void batadv_interface_set_rx_mode(struct net_device *dev)
149{
150}
151
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200152static int batadv_interface_tx(struct sk_buff *skb,
153 struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000154{
Antonio Quartullic018ad32013-06-04 12:11:39 +0200155 struct ethhdr *ethhdr;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200156 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
157 struct batadv_hard_iface *primary_if = NULL;
Sven Eckelmann96412692012-06-05 22:31:30 +0200158 struct batadv_bcast_packet *bcast_packet;
Antonio Quartulli293e9332013-05-19 12:55:16 +0200159 __be16 ethertype = htons(ETH_P_BATMAN);
Simon Wunderlich4934ab92012-08-19 20:10:09 +0200160 static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
161 0x00, 0x00};
162 static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
163 0x00, 0x00};
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100164 enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO;
165 uint8_t *dst_hint = NULL, chaddr[ETH_ALEN];
Antonio Quartullic018ad32013-06-04 12:11:39 +0200166 struct vlan_ethhdr *vhdr;
Marek Lindnerbe7af5c2011-09-08 13:12:53 +0200167 unsigned int header_len = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000168 int data_len = skb->len, ret;
Antonio Quartullic384ea32011-06-26 03:37:18 +0200169 unsigned long brd_delay = 1;
Marek Lindnera19d3d82013-05-27 15:33:25 +0800170 bool do_bcast = false, client_added;
Antonio Quartullic018ad32013-06-04 12:11:39 +0200171 unsigned short vid;
172 uint32_t seqno;
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100173 int gw_mode;
Linus Lüssing1d8ab8d2014-02-15 17:47:52 +0100174 enum batadv_forw_mode forw_mode;
175 struct batadv_orig_node *mcast_single_orig = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000176
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200177 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000178 goto dropped;
179
180 soft_iface->trans_start = jiffies;
Antonio Quartullic018ad32013-06-04 12:11:39 +0200181 vid = batadv_get_vid(skb, 0);
Linus Lüssing927c2ed2014-01-19 22:22:45 +0100182 ethhdr = eth_hdr(skb);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000183
184 switch (ntohs(ethhdr->h_proto)) {
185 case ETH_P_8021Q:
Linus Lüssing927c2ed2014-01-19 22:22:45 +0100186 vhdr = vlan_eth_hdr(skb);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000187
Sven Eckelmann7e071c72012-06-03 22:19:13 +0200188 if (vhdr->h_vlan_encapsulated_proto != ethertype)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000189 break;
190
191 /* fall through */
Antonio Quartulliaf5d4f72012-11-26 00:38:50 +0100192 case ETH_P_BATMAN:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000193 goto dropped;
Simon Wunderlicha7f6ee92012-01-22 20:00:18 +0100194 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000195
Sven Eckelmann08adf152012-05-12 13:38:47 +0200196 if (batadv_bla_tx(bat_priv, skb, vid))
Simon Wunderlich23721382012-01-22 20:00:19 +0100197 goto dropped;
198
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200199 /* skb->data might have been reallocated by batadv_bla_tx() */
Linus Lüssing927c2ed2014-01-19 22:22:45 +0100200 ethhdr = eth_hdr(skb);
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200201
Antonio Quartullia73105b2011-04-27 14:27:44 +0200202 /* Register the client MAC in the transtable */
Marek Lindnera19d3d82013-05-27 15:33:25 +0800203 if (!is_multicast_ether_addr(ethhdr->h_source)) {
204 client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
Antonio Quartulli9464d072013-11-16 12:03:48 +0100205 vid, skb->skb_iif,
206 skb->mark);
Marek Lindnera19d3d82013-05-27 15:33:25 +0800207 if (!client_added)
208 goto dropped;
209 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000210
Simon Wunderlichb1a8c042012-01-22 20:00:25 +0100211 /* don't accept stp packets. STP does not help in meshes.
212 * better use the bridge loop avoidance ...
Simon Wunderlich4934ab92012-08-19 20:10:09 +0200213 *
214 * The same goes for ECTP sent at least by some Cisco Switches,
215 * it might confuse the mesh when used with bridge loop avoidance.
Simon Wunderlichb1a8c042012-01-22 20:00:25 +0100216 */
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200217 if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
Simon Wunderlichb1a8c042012-01-22 20:00:25 +0100218 goto dropped;
219
Simon Wunderlich4934ab92012-08-19 20:10:09 +0200220 if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
221 goto dropped;
222
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100223 gw_mode = atomic_read(&bat_priv->gw_mode);
Marek Lindnerbe7af5c2011-09-08 13:12:53 +0200224 if (is_multicast_ether_addr(ethhdr->h_dest)) {
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100225 /* if gw mode is off, broadcast every packet */
226 if (gw_mode == BATADV_GW_MODE_OFF) {
227 do_bcast = true;
228 goto send;
Marek Lindnerbe7af5c2011-09-08 13:12:53 +0200229 }
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200230
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100231 dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len,
232 chaddr);
233 /* skb->data may have been modified by
234 * batadv_gw_dhcp_recipient_get()
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200235 */
Linus Lüssing927c2ed2014-01-19 22:22:45 +0100236 ethhdr = eth_hdr(skb);
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100237 /* if gw_mode is on, broadcast any non-DHCP message.
238 * All the DHCP packets are going to be sent as unicast
239 */
240 if (dhcp_rcp == BATADV_DHCP_NO) {
241 do_bcast = true;
242 goto send;
243 }
244
245 if (dhcp_rcp == BATADV_DHCP_TO_CLIENT)
246 dst_hint = chaddr;
247 else if ((gw_mode == BATADV_GW_MODE_SERVER) &&
248 (dhcp_rcp == BATADV_DHCP_TO_SERVER))
249 /* gateways should not forward any DHCP message if
250 * directed to a DHCP server
251 */
252 goto dropped;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000253
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100254send:
Linus Lüssing1d8ab8d2014-02-15 17:47:52 +0100255 if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
256 forw_mode = batadv_mcast_forw_mode(bat_priv, skb,
257 &mcast_single_orig);
258 if (forw_mode == BATADV_FORW_NONE)
259 goto dropped;
260
261 if (forw_mode == BATADV_FORW_SINGLE)
262 do_bcast = false;
263 }
264 }
265
Simon Wunderlichc54f38c92013-07-29 17:56:44 +0200266 batadv_skb_set_priority(skb, 0);
267
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000268 /* ethernet packet should be broadcasted */
269 if (do_bcast) {
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200270 primary_if = batadv_primary_if_get_selected(bat_priv);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200271 if (!primary_if)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000272 goto dropped;
273
Antonio Quartullic384ea32011-06-26 03:37:18 +0200274 /* in case of ARP request, we do not immediately broadcasti the
275 * packet, instead we first wait for DAT to try to retrieve the
276 * correct ARP entry
277 */
278 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
279 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
280
Sven Eckelmann04b482a2012-05-12 02:09:38 +0200281 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000282 goto dropped;
283
Sven Eckelmann96412692012-06-05 22:31:30 +0200284 bcast_packet = (struct batadv_bcast_packet *)skb->data;
Simon Wunderlicha40d9b02013-12-02 20:38:31 +0100285 bcast_packet->version = BATADV_COMPAT_VERSION;
286 bcast_packet->ttl = BATADV_TTL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000287
288 /* batman packet type: broadcast */
Simon Wunderlicha40d9b02013-12-02 20:38:31 +0100289 bcast_packet->packet_type = BATADV_BCAST;
Sven Eckelmann162d5492012-06-28 11:56:52 +0200290 bcast_packet->reserved = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000291
292 /* hw address of first interface is the orig mac because only
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200293 * this mac is known throughout the mesh
294 */
Antonio Quartulli8fdd0152014-01-22 00:42:11 +0100295 ether_addr_copy(bcast_packet->orig,
296 primary_if->net_dev->dev_addr);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000297
298 /* set broadcast sequence number */
Sven Eckelmannbbb1f902012-07-08 17:13:15 +0200299 seqno = atomic_inc_return(&bat_priv->bcast_seqno);
300 bcast_packet->seqno = htonl(seqno);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000301
Antonio Quartullic384ea32011-06-26 03:37:18 +0200302 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000303
304 /* a copy is stored in the bcast list, therefore removing
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200305 * the original skb.
306 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000307 kfree_skb(skb);
308
309 /* unicast packet */
310 } else {
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100311 /* DHCP packets going to a server will use the GW feature */
312 if (dhcp_rcp == BATADV_DHCP_TO_SERVER) {
Linus Lüssing9d2c9482013-08-06 20:21:15 +0200313 ret = batadv_gw_out_of_range(bat_priv, skb);
Marek Lindnerbe7af5c2011-09-08 13:12:53 +0200314 if (ret)
315 goto dropped;
Linus Lüssinge300d312013-07-03 10:40:00 +0200316 ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
Linus Lüssing1d8ab8d2014-02-15 17:47:52 +0100317 } else if (mcast_single_orig) {
318 ret = batadv_send_skb_unicast(bat_priv, skb,
319 BATADV_UNICAST, 0,
320 mcast_single_orig, vid);
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100321 } else {
322 if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
323 skb))
324 goto dropped;
Linus Lüssinge300d312013-07-03 10:40:00 +0200325
Antonio Quartulli6c413b12013-11-05 19:31:08 +0100326 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
327
328 ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint,
329 vid);
330 }
Linus Lüssinge300d312013-07-03 10:40:00 +0200331 if (ret == NET_XMIT_DROP)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000332 goto dropped_freed;
333 }
334
Marek Lindner1c9b0552012-06-23 11:47:53 +0200335 batadv_inc_counter(bat_priv, BATADV_CNT_TX);
336 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000337 goto end;
338
339dropped:
340 kfree_skb(skb);
341dropped_freed:
Marek Lindner1c9b0552012-06-23 11:47:53 +0200342 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000343end:
Marek Lindner32ae9b22011-04-20 15:40:58 +0200344 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200345 batadv_hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000346 return NETDEV_TX_OK;
347}
348
Sven Eckelmann04b482a2012-05-12 02:09:38 +0200349void batadv_interface_rx(struct net_device *soft_iface,
Sven Eckelmann56303d32012-06-05 22:31:31 +0200350 struct sk_buff *skb, struct batadv_hard_iface *recv_if,
Antonio Quartulli37135172012-07-05 23:38:30 +0200351 int hdr_size, struct batadv_orig_node *orig_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000352{
Simon Wunderlicha40d9b02013-12-02 20:38:31 +0100353 struct batadv_bcast_packet *batadv_bcast_packet;
Antonio Quartullic018ad32013-06-04 12:11:39 +0200354 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
Antonio Quartulli293e9332013-05-19 12:55:16 +0200355 __be16 ethertype = htons(ETH_P_BATMAN);
Antonio Quartullic018ad32013-06-04 12:11:39 +0200356 struct vlan_ethhdr *vhdr;
357 struct ethhdr *ethhdr;
358 unsigned short vid;
Simon Wunderlich2d3f6cc2012-07-04 20:38:19 +0200359 bool is_bcast;
360
Simon Wunderlicha40d9b02013-12-02 20:38:31 +0100361 batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
362 is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000363
364 /* check if enough space is available for pulling, and pull */
365 if (!pskb_may_pull(skb, hdr_size))
366 goto dropped;
367
368 skb_pull_rcsum(skb, hdr_size);
369 skb_reset_mac_header(skb);
370
Antonio Quartulli55883fd2013-12-23 01:28:05 +0100371 /* clean the netfilter state now that the batman-adv header has been
372 * removed
373 */
374 nf_reset(skb);
375
Antonio Quartulli2b1e2cb2013-12-23 21:43:39 +0100376 vid = batadv_get_vid(skb, 0);
Antonio Quartulli7ed4be92013-04-08 15:08:18 +0200377 ethhdr = eth_hdr(skb);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000378
379 switch (ntohs(ethhdr->h_proto)) {
380 case ETH_P_8021Q:
381 vhdr = (struct vlan_ethhdr *)skb->data;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000382
Sven Eckelmann7e071c72012-06-03 22:19:13 +0200383 if (vhdr->h_vlan_encapsulated_proto != ethertype)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000384 break;
385
386 /* fall through */
Antonio Quartulliaf5d4f72012-11-26 00:38:50 +0100387 case ETH_P_BATMAN:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000388 goto dropped;
389 }
390
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000391 /* skb->dev & skb->pkt_type are set here */
392 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
393 goto dropped;
394 skb->protocol = eth_type_trans(skb, soft_iface);
395
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300396 /* should not be necessary anymore as we use skb_pull_rcsum()
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000397 * TODO: please verify this and remove this TODO
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200398 * -- Dec 21st 2009, Simon Wunderlich
399 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000400
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200401 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000402
Marek Lindner1c9b0552012-06-23 11:47:53 +0200403 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
404 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
405 skb->len + ETH_HLEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000406
407 soft_iface->last_rx = jiffies;
408
Antonio Quartulli74490f92012-11-08 21:55:30 +0100409 /* Let the bridge loop avoidance check the packet. If will
410 * not handle it, we can safely push it up.
411 */
412 if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
413 goto out;
414
Antonio Quartulli37135172012-07-05 23:38:30 +0200415 if (orig_node)
416 batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
Antonio Quartullic018ad32013-06-04 12:11:39 +0200417 ethhdr->h_source, vid);
Antonio Quartulli37135172012-07-05 23:38:30 +0200418
Antonio Quartulli42cb0be2013-11-16 12:03:52 +0100419 if (is_multicast_ether_addr(ethhdr->h_dest)) {
420 /* set the mark on broadcast packets if AP isolation is ON and
421 * the packet is coming from an "isolated" client
422 */
423 if (batadv_vlan_ap_isola_get(bat_priv, vid) &&
424 batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,
425 vid)) {
426 /* save bits in skb->mark not covered by the mask and
427 * apply the mark on the rest
428 */
429 skb->mark &= ~bat_priv->isolation_mark_mask;
430 skb->mark |= bat_priv->isolation_mark;
431 }
432 } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,
433 ethhdr->h_dest, vid)) {
Antonio Quartulli59b699c2011-07-07 15:35:36 +0200434 goto dropped;
Antonio Quartulli42cb0be2013-11-16 12:03:52 +0100435 }
Antonio Quartulli59b699c2011-07-07 15:35:36 +0200436
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000437 netif_rx(skb);
Simon Wunderlichba85fac2011-04-17 20:34:27 +0200438 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000439
440dropped:
441 kfree_skb(skb);
442out:
443 return;
444}
445
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200446/**
447 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
448 * possibly free it
449 * @softif_vlan: the vlan object to release
450 */
Antonio Quartulli35df3b22014-05-08 17:13:15 +0200451void batadv_softif_vlan_free_ref(struct batadv_softif_vlan *vlan)
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200452{
Antonio Quartulli35df3b22014-05-08 17:13:15 +0200453 if (atomic_dec_and_test(&vlan->refcount)) {
454 spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock);
455 hlist_del_rcu(&vlan->list);
456 spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock);
457
458 kfree_rcu(vlan, rcu);
459 }
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200460}
461
462/**
463 * batadv_softif_vlan_get - get the vlan object for a specific vid
464 * @bat_priv: the bat priv with all the soft interface information
465 * @vid: the identifier of the vlan object to retrieve
466 *
467 * Returns the private data of the vlan matching the vid passed as argument or
468 * NULL otherwise. The refcounter of the returned object is incremented by 1.
469 */
Antonio Quartulli90f44352013-07-02 11:04:35 +0200470struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
471 unsigned short vid)
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200472{
473 struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
474
475 rcu_read_lock();
476 hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
477 if (vlan_tmp->vid != vid)
478 continue;
479
480 if (!atomic_inc_not_zero(&vlan_tmp->refcount))
481 continue;
482
483 vlan = vlan_tmp;
484 break;
485 }
486 rcu_read_unlock();
487
488 return vlan;
489}
490
491/**
492 * batadv_create_vlan - allocate the needed resources for a new vlan
493 * @bat_priv: the bat priv with all the soft interface information
494 * @vid: the VLAN identifier
495 *
496 * Returns 0 on success, a negative error otherwise.
497 */
498int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
499{
500 struct batadv_softif_vlan *vlan;
Antonio Quartulli90f44352013-07-02 11:04:35 +0200501 int err;
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200502
503 vlan = batadv_softif_vlan_get(bat_priv, vid);
504 if (vlan) {
505 batadv_softif_vlan_free_ref(vlan);
506 return -EEXIST;
507 }
508
509 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
510 if (!vlan)
511 return -ENOMEM;
512
Antonio Quartulli35df3b22014-05-08 17:13:15 +0200513 vlan->bat_priv = bat_priv;
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200514 vlan->vid = vid;
515 atomic_set(&vlan->refcount, 1);
516
Antonio Quartullib8cbd812013-07-02 11:04:36 +0200517 atomic_set(&vlan->ap_isolation, 0);
518
Antonio Quartulli90f44352013-07-02 11:04:35 +0200519 err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
520 if (err) {
521 kfree(vlan);
522 return err;
523 }
524
Antonio Quartulli35df3b22014-05-08 17:13:15 +0200525 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
526 hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
527 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
528
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200529 /* add a new TT local entry. This one will be marked with the NOPURGE
530 * flag
531 */
532 batadv_tt_local_add(bat_priv->soft_iface,
533 bat_priv->soft_iface->dev_addr, vid,
Antonio Quartulli9464d072013-11-16 12:03:48 +0100534 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200535
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200536 return 0;
537}
538
539/**
540 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
541 * @bat_priv: the bat priv with all the soft interface information
542 * @vlan: the object to remove
543 */
544static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
545 struct batadv_softif_vlan *vlan)
546{
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200547 /* explicitly remove the associated TT local entry because it is marked
548 * with the NOPURGE flag
549 */
550 batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
551 vlan->vid, "vlan interface destroyed", false);
552
Antonio Quartulli35df3b22014-05-08 17:13:15 +0200553 batadv_sysfs_del_vlan(bat_priv, vlan);
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200554 batadv_softif_vlan_free_ref(vlan);
555}
556
557/**
558 * batadv_interface_add_vid - ndo_add_vid API implementation
559 * @dev: the netdev of the mesh interface
560 * @vid: identifier of the new vlan
561 *
562 * Set up all the internal structures for handling the new vlan on top of the
563 * mesh interface
564 *
565 * Returns 0 on success or a negative error code in case of failure.
566 */
567static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
568 unsigned short vid)
569{
570 struct batadv_priv *bat_priv = netdev_priv(dev);
Antonio Quartulli35df3b22014-05-08 17:13:15 +0200571 struct batadv_softif_vlan *vlan;
572 int ret;
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200573
574 /* only 802.1Q vlans are supported.
575 * batman-adv does not know how to handle other types
576 */
577 if (proto != htons(ETH_P_8021Q))
578 return -EINVAL;
579
580 vid |= BATADV_VLAN_HAS_TAG;
581
Antonio Quartulli35df3b22014-05-08 17:13:15 +0200582 /* if a new vlan is getting created and it already exists, it means that
583 * it was not deleted yet. batadv_softif_vlan_get() increases the
584 * refcount in order to revive the object.
585 *
586 * if it does not exist then create it.
587 */
588 vlan = batadv_softif_vlan_get(bat_priv, vid);
589 if (!vlan)
590 return batadv_softif_create_vlan(bat_priv, vid);
591
592 /* recreate the sysfs object if it was already destroyed (and it should
593 * be since we received a kill_vid() for this vlan
594 */
595 if (!vlan->kobj) {
596 ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
597 if (ret) {
598 batadv_softif_vlan_free_ref(vlan);
599 return ret;
600 }
601 }
602
603 /* add a new TT local entry. This one will be marked with the NOPURGE
604 * flag. This must be added again, even if the vlan object already
605 * exists, because the entry was deleted by kill_vid()
606 */
607 batadv_tt_local_add(bat_priv->soft_iface,
608 bat_priv->soft_iface->dev_addr, vid,
609 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
610
611 return 0;
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200612}
613
614/**
615 * batadv_interface_kill_vid - ndo_kill_vid API implementation
616 * @dev: the netdev of the mesh interface
617 * @vid: identifier of the deleted vlan
618 *
619 * Destroy all the internal structures used to handle the vlan identified by vid
620 * on top of the mesh interface
621 *
622 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
623 * or -ENOENT if the specified vlan id wasn't registered.
624 */
625static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
626 unsigned short vid)
627{
628 struct batadv_priv *bat_priv = netdev_priv(dev);
629 struct batadv_softif_vlan *vlan;
630
631 /* only 802.1Q vlans are supported. batman-adv does not know how to
632 * handle other types
633 */
634 if (proto != htons(ETH_P_8021Q))
635 return -EINVAL;
636
637 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
638 if (!vlan)
639 return -ENOENT;
640
641 batadv_softif_destroy_vlan(bat_priv, vlan);
642
643 /* finally free the vlan object */
644 batadv_softif_vlan_free_ref(vlan);
645
646 return 0;
647}
648
Sven Eckelmann36c1d152012-08-20 09:03:59 +0200649/* batman-adv network devices have devices nesting below it and are a special
650 * "super class" of normal network devices; split their locks off into a
651 * separate class since they always nest.
652 */
653static struct lock_class_key batadv_netdev_xmit_lock_key;
654static struct lock_class_key batadv_netdev_addr_lock_key;
655
656/**
657 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
658 * @dev: device which owns the tx queue
659 * @txq: tx queue to modify
660 * @_unused: always NULL
661 */
662static void batadv_set_lockdep_class_one(struct net_device *dev,
663 struct netdev_queue *txq,
664 void *_unused)
665{
666 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
667}
668
669/**
670 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
671 * @dev: network device to modify
672 */
673static void batadv_set_lockdep_class(struct net_device *dev)
674{
675 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
676 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
677}
678
679/**
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100680 * batadv_softif_destroy_finish - cleans up the remains of a softif
681 * @work: work queue item
682 *
683 * Free the parts of the soft interface which can not be removed under
684 * rtnl lock (to prevent deadlock situations).
685 */
686static void batadv_softif_destroy_finish(struct work_struct *work)
687{
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200688 struct batadv_softif_vlan *vlan;
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100689 struct batadv_priv *bat_priv;
690 struct net_device *soft_iface;
691
692 bat_priv = container_of(work, struct batadv_priv,
693 cleanup_work);
694 soft_iface = bat_priv->soft_iface;
695
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200696 /* destroy the "untagged" VLAN */
697 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
698 if (vlan) {
699 batadv_softif_destroy_vlan(bat_priv, vlan);
700 batadv_softif_vlan_free_ref(vlan);
701 }
702
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100703 batadv_sysfs_del_meshif(soft_iface);
Marek Lindneraf63fde2014-02-08 23:28:18 +0800704 unregister_netdev(soft_iface);
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100705}
706
Sven Eckelmann37130292013-02-11 17:10:22 +0800707/**
708 * batadv_softif_init_late - late stage initialization of soft interface
709 * @dev: registered network device to modify
710 *
711 * Returns error code on failures
712 */
713static int batadv_softif_init_late(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000714{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200715 struct batadv_priv *bat_priv;
Martin Hundebøllee75ed82013-05-23 16:53:03 +0200716 uint32_t random_seqno;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000717 int ret;
Sven Eckelmannd69909d2012-06-03 22:19:20 +0200718 size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000719
Sven Eckelmann37130292013-02-11 17:10:22 +0800720 batadv_set_lockdep_class(dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000721
Sven Eckelmann37130292013-02-11 17:10:22 +0800722 bat_priv = netdev_priv(dev);
723 bat_priv->soft_iface = dev;
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100724 INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish);
Marek Lindner1c9b0552012-06-23 11:47:53 +0200725
726 /* batadv_interface_stats() needs to be available as soon as
727 * register_netdevice() has been called
728 */
729 bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
730 if (!bat_priv->bat_counters)
Sven Eckelmann37130292013-02-11 17:10:22 +0800731 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000732
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000733 atomic_set(&bat_priv->aggregated_ogms, 1);
734 atomic_set(&bat_priv->bonding, 0);
Antonio Quartullifa706552012-11-26 01:27:29 +0100735#ifdef CONFIG_BATMAN_ADV_BLA
Simon Wunderlich23721382012-01-22 20:00:19 +0100736 atomic_set(&bat_priv->bridge_loop_avoidance, 0);
Antonio Quartullifa706552012-11-26 01:27:29 +0100737#endif
Antonio Quartulli33af49a2012-08-08 18:50:57 +0200738#ifdef CONFIG_BATMAN_ADV_DAT
739 atomic_set(&bat_priv->distributed_arp_table, 1);
740#endif
Linus Lüssing60432d72014-02-15 17:47:51 +0100741#ifdef CONFIG_BATMAN_ADV_MCAST
742 bat_priv->mcast.flags = BATADV_NO_FLAGS;
Linus Lüssing1d8ab8d2014-02-15 17:47:52 +0100743 atomic_set(&bat_priv->multicast_mode, 1);
Linus Lüssing60432d72014-02-15 17:47:51 +0100744 atomic_set(&bat_priv->mcast.num_disabled, 0);
Linus Lüssingab498862014-02-15 17:47:53 +0100745 atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);
Linus Lüssing4c8755d2014-02-15 17:47:54 +0100746 atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0);
747 atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0);
Linus Lüssing60432d72014-02-15 17:47:51 +0100748#endif
Sven Eckelmanncd646ab2012-06-03 22:19:18 +0200749 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000750 atomic_set(&bat_priv->gw_sel_class, 20);
Marek Lindner414254e2013-04-23 21:39:58 +0800751 atomic_set(&bat_priv->gw.bandwidth_down, 100);
752 atomic_set(&bat_priv->gw.bandwidth_up, 20);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000753 atomic_set(&bat_priv->orig_interval, 1000);
Simon Wunderliche03366e2014-06-17 12:16:03 +0200754 atomic_set(&bat_priv->hop_penalty, 30);
Marek Lindner0c430d02012-12-16 13:53:15 +0800755#ifdef CONFIG_BATMAN_ADV_DEBUG
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000756 atomic_set(&bat_priv->log_level, 0);
Marek Lindner0c430d02012-12-16 13:53:15 +0800757#endif
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000758 atomic_set(&bat_priv->fragmentation, 1);
Marek Lindnera19d3d82013-05-27 15:33:25 +0800759 atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200760 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
761 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000762
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200763 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000764 atomic_set(&bat_priv->bcast_seqno, 1);
Sven Eckelmann807736f2012-07-15 22:26:51 +0200765 atomic_set(&bat_priv->tt.vn, 0);
766 atomic_set(&bat_priv->tt.local_changes, 0);
767 atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
768#ifdef CONFIG_BATMAN_ADV_BLA
769 atomic_set(&bat_priv->bla.num_requests, 0);
770#endif
771 bat_priv->tt.last_changeset = NULL;
772 bat_priv->tt.last_changeset_len = 0;
Antonio Quartullic42edfe2013-11-16 12:03:47 +0100773 bat_priv->isolation_mark = 0;
774 bat_priv->isolation_mark_mask = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000775
Martin Hundebøllee75ed82013-05-23 16:53:03 +0200776 /* randomize initial seqno to avoid collision */
777 get_random_bytes(&random_seqno, sizeof(random_seqno));
778 atomic_set(&bat_priv->frag_seqno, random_seqno);
779
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000780 bat_priv->primary_if = NULL;
781 bat_priv->num_ifaces = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000782
Martin Hundebølld353d8d2013-01-25 11:12:38 +0100783 batadv_nc_init_bat_priv(bat_priv);
784
Sven Eckelmann37130292013-02-11 17:10:22 +0800785 ret = batadv_algo_select(bat_priv, batadv_routing_algo);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000786 if (ret < 0)
Sven Eckelmann37130292013-02-11 17:10:22 +0800787 goto free_bat_counters;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000788
Sven Eckelmann37130292013-02-11 17:10:22 +0800789 ret = batadv_debugfs_add_meshif(dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000790 if (ret < 0)
Sven Eckelmann37130292013-02-11 17:10:22 +0800791 goto free_bat_counters;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000792
Sven Eckelmann37130292013-02-11 17:10:22 +0800793 ret = batadv_mesh_init(dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000794 if (ret < 0)
795 goto unreg_debugfs;
796
Sven Eckelmann37130292013-02-11 17:10:22 +0800797 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000798
799unreg_debugfs:
Sven Eckelmann37130292013-02-11 17:10:22 +0800800 batadv_debugfs_del_meshif(dev);
Marek Lindner1c9b0552012-06-23 11:47:53 +0200801free_bat_counters:
802 free_percpu(bat_priv->bat_counters);
Martin Hundebøllf69ae772013-04-17 21:13:16 +0200803 bat_priv->bat_counters = NULL;
Sven Eckelmann37130292013-02-11 17:10:22 +0800804
805 return ret;
806}
807
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800808/**
809 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
810 * @dev: batadv_soft_interface used as master interface
811 * @slave_dev: net_device which should become the slave interface
812 *
813 * Return 0 if successful or error otherwise.
814 */
815static int batadv_softif_slave_add(struct net_device *dev,
816 struct net_device *slave_dev)
817{
818 struct batadv_hard_iface *hard_iface;
819 int ret = -EINVAL;
820
821 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
822 if (!hard_iface || hard_iface->soft_iface != NULL)
823 goto out;
824
825 ret = batadv_hardif_enable_interface(hard_iface, dev->name);
826
827out:
828 if (hard_iface)
829 batadv_hardif_free_ref(hard_iface);
830 return ret;
831}
832
833/**
834 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
835 * @dev: batadv_soft_interface used as master interface
836 * @slave_dev: net_device which should be removed from the master interface
837 *
838 * Return 0 if successful or error otherwise.
839 */
840static int batadv_softif_slave_del(struct net_device *dev,
841 struct net_device *slave_dev)
842{
843 struct batadv_hard_iface *hard_iface;
844 int ret = -EINVAL;
845
846 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
847
848 if (!hard_iface || hard_iface->soft_iface != dev)
849 goto out;
850
851 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP);
852 ret = 0;
853
854out:
855 if (hard_iface)
856 batadv_hardif_free_ref(hard_iface);
857 return ret;
858}
859
Sven Eckelmann37130292013-02-11 17:10:22 +0800860static const struct net_device_ops batadv_netdev_ops = {
861 .ndo_init = batadv_softif_init_late,
862 .ndo_open = batadv_interface_open,
863 .ndo_stop = batadv_interface_release,
864 .ndo_get_stats = batadv_interface_stats,
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200865 .ndo_vlan_rx_add_vid = batadv_interface_add_vid,
866 .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
Sven Eckelmann37130292013-02-11 17:10:22 +0800867 .ndo_set_mac_address = batadv_interface_set_mac_addr,
868 .ndo_change_mtu = batadv_interface_change_mtu,
Linus Lüssinga4deee1a2013-05-26 17:56:07 +0200869 .ndo_set_rx_mode = batadv_interface_set_rx_mode,
Sven Eckelmann37130292013-02-11 17:10:22 +0800870 .ndo_start_xmit = batadv_interface_tx,
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800871 .ndo_validate_addr = eth_validate_addr,
872 .ndo_add_slave = batadv_softif_slave_add,
873 .ndo_del_slave = batadv_softif_slave_del,
Sven Eckelmann37130292013-02-11 17:10:22 +0800874};
875
876/**
Sven Eckelmannb3246022013-02-11 17:10:23 +0800877 * batadv_softif_free - Deconstructor of batadv_soft_interface
878 * @dev: Device to cleanup and remove
879 */
880static void batadv_softif_free(struct net_device *dev)
881{
882 batadv_debugfs_del_meshif(dev);
883 batadv_mesh_free(dev);
Antonio Quartulli0c501342013-04-19 11:04:52 +0200884
885 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
886 * their tasks. Wait for them all to be finished before freeing the
887 * netdev and its private data (bat_priv)
888 */
889 rcu_barrier();
890
Sven Eckelmannb3246022013-02-11 17:10:23 +0800891 free_netdev(dev);
892}
893
894/**
Sven Eckelmann37130292013-02-11 17:10:22 +0800895 * batadv_softif_init_early - early stage initialization of soft interface
896 * @dev: registered network device to modify
897 */
898static void batadv_softif_init_early(struct net_device *dev)
899{
900 struct batadv_priv *priv = netdev_priv(dev);
901
902 ether_setup(dev);
903
904 dev->netdev_ops = &batadv_netdev_ops;
Sven Eckelmannb3246022013-02-11 17:10:23 +0800905 dev->destructor = batadv_softif_free;
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200906 dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
Sven Eckelmann37130292013-02-11 17:10:22 +0800907 dev->tx_queue_len = 0;
908
909 /* can't call min_mtu, because the needed variables
910 * have not been initialized yet
911 */
912 dev->mtu = ETH_DATA_LEN;
913 /* reserve more space in the skbuff for our header */
Marek Lindner411d6ed2013-05-08 13:31:59 +0800914 dev->hard_header_len = batadv_max_header_len();
Sven Eckelmann37130292013-02-11 17:10:22 +0800915
916 /* generate random address */
917 eth_hw_addr_random(dev);
918
Wilfried Klaebe7ad24ea2014-05-11 00:12:32 +0000919 dev->ethtool_ops = &batadv_ethtool_ops;
Sven Eckelmann37130292013-02-11 17:10:22 +0800920
921 memset(priv, 0, sizeof(*priv));
922}
923
924struct net_device *batadv_softif_create(const char *name)
925{
926 struct net_device *soft_iface;
927 int ret;
928
929 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
Tom Gundersenc835a672014-07-14 16:37:24 +0200930 NET_NAME_UNKNOWN, batadv_softif_init_early);
Sven Eckelmann37130292013-02-11 17:10:22 +0800931 if (!soft_iface)
932 return NULL;
933
Sven Eckelmanna4ac28c2013-02-11 17:10:26 +0800934 soft_iface->rtnl_link_ops = &batadv_link_ops;
935
Sven Eckelmann37130292013-02-11 17:10:22 +0800936 ret = register_netdevice(soft_iface);
937 if (ret < 0) {
938 pr_err("Unable to register the batman interface '%s': %i\n",
939 name, ret);
940 free_netdev(soft_iface);
941 return NULL;
942 }
943
944 return soft_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000945}
946
Marek Lindnere07932a2013-02-11 17:10:25 +0800947/**
948 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
949 * @soft_iface: the to-be-removed batman-adv interface
950 */
951void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000952{
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100953 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
954
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100955 queue_work(batadv_event_workqueue, &bat_priv->cleanup_work);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000956}
957
Sven Eckelmanna4ac28c2013-02-11 17:10:26 +0800958/**
959 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
960 * @soft_iface: the to-be-removed batman-adv interface
961 * @head: list pointer
962 */
963static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
964 struct list_head *head)
965{
966 struct batadv_hard_iface *hard_iface;
967
968 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
969 if (hard_iface->soft_iface == soft_iface)
970 batadv_hardif_disable_interface(hard_iface,
971 BATADV_IF_CLEANUP_KEEP);
972 }
973
974 batadv_sysfs_del_meshif(soft_iface);
975 unregister_netdevice_queue(soft_iface, head);
976}
977
Sven Eckelmann04b482a2012-05-12 02:09:38 +0200978int batadv_softif_is_valid(const struct net_device *net_dev)
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000979{
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200980 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000981 return 1;
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000982
983 return 0;
984}
985
Sven Eckelmanna4ac28c2013-02-11 17:10:26 +0800986struct rtnl_link_ops batadv_link_ops __read_mostly = {
987 .kind = "batadv",
988 .priv_size = sizeof(struct batadv_priv),
989 .setup = batadv_softif_init_early,
990 .dellink = batadv_softif_destroy_netlink,
991};
992
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000993/* ethtool */
Sven Eckelmann0294ca02012-05-16 20:23:15 +0200994static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000995{
996 cmd->supported = 0;
997 cmd->advertising = 0;
David Decotigny70739492011-04-27 18:32:40 +0000998 ethtool_cmd_speed_set(cmd, SPEED_10);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000999 cmd->duplex = DUPLEX_FULL;
1000 cmd->port = PORT_TP;
1001 cmd->phy_address = 0;
1002 cmd->transceiver = XCVR_INTERNAL;
1003 cmd->autoneg = AUTONEG_DISABLE;
1004 cmd->maxtxpkt = 0;
1005 cmd->maxrxpkt = 0;
1006
1007 return 0;
1008}
1009
Sven Eckelmann0294ca02012-05-16 20:23:15 +02001010static void batadv_get_drvinfo(struct net_device *dev,
1011 struct ethtool_drvinfo *info)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001012{
Jiri Pirko7826d432013-01-06 00:44:26 +00001013 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
1014 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
1015 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
1016 strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001017}
1018
Sven Eckelmann0294ca02012-05-16 20:23:15 +02001019static u32 batadv_get_msglevel(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001020{
1021 return -EOPNOTSUPP;
1022}
1023
Sven Eckelmann0294ca02012-05-16 20:23:15 +02001024static void batadv_set_msglevel(struct net_device *dev, u32 value)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001025{
1026}
1027
Sven Eckelmann0294ca02012-05-16 20:23:15 +02001028static u32 batadv_get_link(struct net_device *dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001029{
1030 return 1;
1031}
Martin Hundebøllf8214862012-04-20 17:02:45 +02001032
1033/* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
1034 * Declare each description string in struct.name[] to get fixed sized buffer
1035 * and compile time checking for strings longer than ETH_GSTRING_LEN.
1036 */
1037static const struct {
1038 const char name[ETH_GSTRING_LEN];
Sven Eckelmann0294ca02012-05-16 20:23:15 +02001039} batadv_counters_strings[] = {
Marek Lindner1c9b0552012-06-23 11:47:53 +02001040 { "tx" },
1041 { "tx_bytes" },
1042 { "tx_dropped" },
1043 { "rx" },
1044 { "rx_bytes" },
Martin Hundebøllf8214862012-04-20 17:02:45 +02001045 { "forward" },
1046 { "forward_bytes" },
1047 { "mgmt_tx" },
1048 { "mgmt_tx_bytes" },
1049 { "mgmt_rx" },
1050 { "mgmt_rx_bytes" },
Martin Hundebøllee75ed82013-05-23 16:53:03 +02001051 { "frag_tx" },
1052 { "frag_tx_bytes" },
Martin Hundebøll610bfc6bc2013-05-23 16:53:02 +02001053 { "frag_rx" },
1054 { "frag_rx_bytes" },
1055 { "frag_fwd" },
1056 { "frag_fwd_bytes" },
Martin Hundebøllf8214862012-04-20 17:02:45 +02001057 { "tt_request_tx" },
1058 { "tt_request_rx" },
1059 { "tt_response_tx" },
1060 { "tt_response_rx" },
1061 { "tt_roam_adv_tx" },
1062 { "tt_roam_adv_rx" },
Martin Hundebøll4046b242012-04-20 17:02:45 +02001063#ifdef CONFIG_BATMAN_ADV_DAT
1064 { "dat_get_tx" },
1065 { "dat_get_rx" },
1066 { "dat_put_tx" },
1067 { "dat_put_rx" },
1068 { "dat_cached_reply_tx" },
1069#endif
Martin Hundebøll3c12de92013-01-25 11:12:41 +01001070#ifdef CONFIG_BATMAN_ADV_NC
1071 { "nc_code" },
1072 { "nc_code_bytes" },
1073 { "nc_recode" },
1074 { "nc_recode_bytes" },
Martin Hundebøll612d2b42013-01-25 11:12:42 +01001075 { "nc_buffer" },
Martin Hundebøll2df52782013-01-25 11:12:43 +01001076 { "nc_decode" },
1077 { "nc_decode_bytes" },
1078 { "nc_decode_failed" },
1079 { "nc_sniffed" },
Martin Hundebøll3c12de92013-01-25 11:12:41 +01001080#endif
Martin Hundebøllf8214862012-04-20 17:02:45 +02001081};
1082
1083static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
1084 uint8_t *data)
1085{
1086 if (stringset == ETH_SS_STATS)
Sven Eckelmann0294ca02012-05-16 20:23:15 +02001087 memcpy(data, batadv_counters_strings,
1088 sizeof(batadv_counters_strings));
Martin Hundebøllf8214862012-04-20 17:02:45 +02001089}
1090
1091static void batadv_get_ethtool_stats(struct net_device *dev,
1092 struct ethtool_stats *stats,
1093 uint64_t *data)
1094{
Sven Eckelmann56303d32012-06-05 22:31:31 +02001095 struct batadv_priv *bat_priv = netdev_priv(dev);
Martin Hundebøllf8214862012-04-20 17:02:45 +02001096 int i;
1097
Sven Eckelmannd69909d2012-06-03 22:19:20 +02001098 for (i = 0; i < BATADV_CNT_NUM; i++)
Martin Hundebøllf8214862012-04-20 17:02:45 +02001099 data[i] = batadv_sum_counter(bat_priv, i);
1100}
1101
1102static int batadv_get_sset_count(struct net_device *dev, int stringset)
1103{
1104 if (stringset == ETH_SS_STATS)
Sven Eckelmannd69909d2012-06-03 22:19:20 +02001105 return BATADV_CNT_NUM;
Martin Hundebøllf8214862012-04-20 17:02:45 +02001106
1107 return -EOPNOTSUPP;
1108}