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0046b040 | 1 | /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "soft-interface.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/atomic.h> | |
22 | #include <linux/byteorder/generic.h> | |
23 | #include <linux/cache.h> | |
24 | #include <linux/compiler.h> | |
25 | #include <linux/errno.h> | |
c6c8fea2 | 26 | #include <linux/etherdevice.h> |
1e2c2a4f SE |
27 | #include <linux/ethtool.h> |
28 | #include <linux/fs.h> | |
29 | #include <linux/if_ether.h> | |
c6c8fea2 | 30 | #include <linux/if_vlan.h> |
1e2c2a4f SE |
31 | #include <linux/jiffies.h> |
32 | #include <linux/kernel.h> | |
6be4d30c | 33 | #include <linux/kref.h> |
1e2c2a4f SE |
34 | #include <linux/list.h> |
35 | #include <linux/lockdep.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/percpu.h> | |
38 | #include <linux/printk.h> | |
39 | #include <linux/random.h> | |
40 | #include <linux/rculist.h> | |
41 | #include <linux/rcupdate.h> | |
42 | #include <linux/skbuff.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/socket.h> | |
45 | #include <linux/spinlock.h> | |
46 | #include <linux/stddef.h> | |
47 | #include <linux/string.h> | |
48 | #include <linux/types.h> | |
49 | #include <linux/workqueue.h> | |
50 | ||
23721387 | 51 | #include "bridge_loop_avoidance.h" |
1e2c2a4f SE |
52 | #include "debugfs.h" |
53 | #include "distributed-arp-table.h" | |
54 | #include "gateway_client.h" | |
55 | #include "gateway_common.h" | |
56 | #include "hard-interface.h" | |
57 | #include "multicast.h" | |
d353d8d4 | 58 | #include "network-coding.h" |
1e2c2a4f SE |
59 | #include "packet.h" |
60 | #include "send.h" | |
61 | #include "sysfs.h" | |
62 | #include "translation-table.h" | |
c6c8fea2 | 63 | |
0294ca0d SE |
64 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); |
65 | static void batadv_get_drvinfo(struct net_device *dev, | |
66 | struct ethtool_drvinfo *info); | |
67 | static u32 batadv_get_msglevel(struct net_device *dev); | |
68 | static void batadv_set_msglevel(struct net_device *dev, u32 value); | |
69 | static u32 batadv_get_link(struct net_device *dev); | |
f8214865 MH |
70 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); |
71 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
72 | struct ethtool_stats *stats, u64 *data); | |
73 | static int batadv_get_sset_count(struct net_device *dev, int stringset); | |
c6c8fea2 | 74 | |
0294ca0d SE |
75 | static const struct ethtool_ops batadv_ethtool_ops = { |
76 | .get_settings = batadv_get_settings, | |
77 | .get_drvinfo = batadv_get_drvinfo, | |
78 | .get_msglevel = batadv_get_msglevel, | |
79 | .set_msglevel = batadv_set_msglevel, | |
80 | .get_link = batadv_get_link, | |
f8214865 MH |
81 | .get_strings = batadv_get_strings, |
82 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
83 | .get_sset_count = batadv_get_sset_count, | |
c6c8fea2 SE |
84 | }; |
85 | ||
04b482a2 | 86 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
87 | { |
88 | int result; | |
89 | ||
9cfc7bd6 | 90 | /* TODO: We must check if we can release all references to non-payload |
c6c8fea2 SE |
91 | * data using skb_header_release in our skbs to allow skb_cow_header to |
92 | * work optimally. This means that those skbs are not allowed to read | |
93 | * or write any data which is before the current position of skb->data | |
94 | * after that call and thus allow other skbs with the same data buffer | |
95 | * to write freely in that area. | |
96 | */ | |
97 | result = skb_cow_head(skb, len); | |
98 | if (result < 0) | |
99 | return result; | |
100 | ||
101 | skb_push(skb, len); | |
102 | return 0; | |
103 | } | |
104 | ||
0294ca0d | 105 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
106 | { |
107 | netif_start_queue(dev); | |
108 | return 0; | |
109 | } | |
110 | ||
0294ca0d | 111 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
112 | { |
113 | netif_stop_queue(dev); | |
114 | return 0; | |
115 | } | |
116 | ||
0294ca0d | 117 | static struct net_device_stats *batadv_interface_stats(struct net_device *dev) |
c6c8fea2 | 118 | { |
56303d34 | 119 | struct batadv_priv *bat_priv = netdev_priv(dev); |
1c9b0550 ML |
120 | struct net_device_stats *stats = &bat_priv->stats; |
121 | ||
122 | stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); | |
123 | stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); | |
124 | stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); | |
125 | stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); | |
126 | stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); | |
127 | return stats; | |
c6c8fea2 SE |
128 | } |
129 | ||
0294ca0d | 130 | static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) |
c6c8fea2 | 131 | { |
56303d34 | 132 | struct batadv_priv *bat_priv = netdev_priv(dev); |
94d1dd87 | 133 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 134 | struct sockaddr *addr = p; |
6b5e971a | 135 | u8 old_addr[ETH_ALEN]; |
c6c8fea2 SE |
136 | |
137 | if (!is_valid_ether_addr(addr->sa_data)) | |
138 | return -EADDRNOTAVAIL; | |
139 | ||
8fdd0153 AQ |
140 | ether_addr_copy(old_addr, dev->dev_addr); |
141 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
40a3eb33 | 142 | |
015758d0 | 143 | /* only modify transtable if it has been initialized before */ |
94d1dd87 AQ |
144 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
145 | return 0; | |
146 | ||
147 | rcu_read_lock(); | |
148 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
149 | batadv_tt_local_remove(bat_priv, old_addr, vlan->vid, | |
08c36d3e | 150 | "mac address changed", false); |
94d1dd87 | 151 | batadv_tt_local_add(dev, addr->sa_data, vlan->vid, |
9464d071 | 152 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
c6c8fea2 | 153 | } |
94d1dd87 | 154 | rcu_read_unlock(); |
c6c8fea2 | 155 | |
c6c8fea2 SE |
156 | return 0; |
157 | } | |
158 | ||
0294ca0d | 159 | static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) |
c6c8fea2 SE |
160 | { |
161 | /* check ranges */ | |
9563877e | 162 | if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) |
c6c8fea2 SE |
163 | return -EINVAL; |
164 | ||
165 | dev->mtu = new_mtu; | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
a4deee1a LL |
170 | /** |
171 | * batadv_interface_set_rx_mode - set the rx mode of a device | |
172 | * @dev: registered network device to modify | |
173 | * | |
174 | * We do not actually need to set any rx filters for the virtual batman | |
175 | * soft interface. However a dummy handler enables a user to set static | |
176 | * multicast listeners for instance. | |
177 | */ | |
178 | static void batadv_interface_set_rx_mode(struct net_device *dev) | |
179 | { | |
180 | } | |
181 | ||
0294ca0d SE |
182 | static int batadv_interface_tx(struct sk_buff *skb, |
183 | struct net_device *soft_iface) | |
c6c8fea2 | 184 | { |
c018ad3d | 185 | struct ethhdr *ethhdr; |
56303d34 SE |
186 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
187 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 188 | struct batadv_bcast_packet *bcast_packet; |
6b5e971a SE |
189 | static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, |
190 | 0x00, 0x00}; | |
191 | static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, | |
192 | 0x00, 0x00}; | |
6c413b1c | 193 | enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; |
6b5e971a | 194 | u8 *dst_hint = NULL, chaddr[ETH_ALEN]; |
c018ad3d | 195 | struct vlan_ethhdr *vhdr; |
be7af5cf | 196 | unsigned int header_len = 0; |
c6c8fea2 | 197 | int data_len = skb->len, ret; |
c018ad3d | 198 | unsigned long brd_delay = 1; |
a19d3d85 | 199 | bool do_bcast = false, client_added; |
c018ad3d | 200 | unsigned short vid; |
6b5e971a | 201 | u32 seqno; |
6c413b1c | 202 | int gw_mode; |
1d8ab8d3 LL |
203 | enum batadv_forw_mode forw_mode; |
204 | struct batadv_orig_node *mcast_single_orig = NULL; | |
53cf037b | 205 | int network_offset = ETH_HLEN; |
c6c8fea2 | 206 | |
39c75a51 | 207 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
208 | goto dropped; |
209 | ||
860e9538 | 210 | netif_trans_update(soft_iface); |
c018ad3d | 211 | vid = batadv_get_vid(skb, 0); |
927c2ed7 | 212 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
213 | |
214 | switch (ntohs(ethhdr->h_proto)) { | |
215 | case ETH_P_8021Q: | |
927c2ed7 | 216 | vhdr = vlan_eth_hdr(skb); |
c6c8fea2 | 217 | |
9d1601ef ML |
218 | /* drop batman-in-batman packets to prevent loops */ |
219 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) { | |
53cf037b | 220 | network_offset += VLAN_HLEN; |
c6c8fea2 | 221 | break; |
53cf037b | 222 | } |
c6c8fea2 SE |
223 | |
224 | /* fall through */ | |
af5d4f77 | 225 | case ETH_P_BATMAN: |
c6c8fea2 | 226 | goto dropped; |
a7f6ee94 | 227 | } |
c6c8fea2 | 228 | |
53cf037b LL |
229 | skb_set_network_header(skb, network_offset); |
230 | ||
08adf151 | 231 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
232 | goto dropped; |
233 | ||
9d2c9488 | 234 | /* skb->data might have been reallocated by batadv_bla_tx() */ |
927c2ed7 | 235 | ethhdr = eth_hdr(skb); |
9d2c9488 | 236 | |
a73105b8 | 237 | /* Register the client MAC in the transtable */ |
a19d3d85 ML |
238 | if (!is_multicast_ether_addr(ethhdr->h_source)) { |
239 | client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, | |
9464d071 AQ |
240 | vid, skb->skb_iif, |
241 | skb->mark); | |
a19d3d85 ML |
242 | if (!client_added) |
243 | goto dropped; | |
244 | } | |
c6c8fea2 | 245 | |
b1a8c04b SW |
246 | /* don't accept stp packets. STP does not help in meshes. |
247 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
248 | * |
249 | * The same goes for ECTP sent at least by some Cisco Switches, | |
250 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 251 | */ |
1eda58bf | 252 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
253 | goto dropped; |
254 | ||
4934ab95 SW |
255 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
256 | goto dropped; | |
257 | ||
6c413b1c | 258 | gw_mode = atomic_read(&bat_priv->gw_mode); |
be7af5cf | 259 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
6c413b1c AQ |
260 | /* if gw mode is off, broadcast every packet */ |
261 | if (gw_mode == BATADV_GW_MODE_OFF) { | |
262 | do_bcast = true; | |
263 | goto send; | |
be7af5cf | 264 | } |
9d2c9488 | 265 | |
6c413b1c AQ |
266 | dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, |
267 | chaddr); | |
268 | /* skb->data may have been modified by | |
269 | * batadv_gw_dhcp_recipient_get() | |
9d2c9488 | 270 | */ |
927c2ed7 | 271 | ethhdr = eth_hdr(skb); |
6c413b1c AQ |
272 | /* if gw_mode is on, broadcast any non-DHCP message. |
273 | * All the DHCP packets are going to be sent as unicast | |
274 | */ | |
275 | if (dhcp_rcp == BATADV_DHCP_NO) { | |
276 | do_bcast = true; | |
277 | goto send; | |
278 | } | |
279 | ||
280 | if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) | |
281 | dst_hint = chaddr; | |
282 | else if ((gw_mode == BATADV_GW_MODE_SERVER) && | |
283 | (dhcp_rcp == BATADV_DHCP_TO_SERVER)) | |
284 | /* gateways should not forward any DHCP message if | |
285 | * directed to a DHCP server | |
286 | */ | |
287 | goto dropped; | |
c6c8fea2 | 288 | |
6c413b1c | 289 | send: |
1d8ab8d3 LL |
290 | if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { |
291 | forw_mode = batadv_mcast_forw_mode(bat_priv, skb, | |
292 | &mcast_single_orig); | |
293 | if (forw_mode == BATADV_FORW_NONE) | |
294 | goto dropped; | |
295 | ||
296 | if (forw_mode == BATADV_FORW_SINGLE) | |
297 | do_bcast = false; | |
298 | } | |
299 | } | |
300 | ||
c54f38c9 SW |
301 | batadv_skb_set_priority(skb, 0); |
302 | ||
c6c8fea2 SE |
303 | /* ethernet packet should be broadcasted */ |
304 | if (do_bcast) { | |
e5d89254 | 305 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 306 | if (!primary_if) |
c6c8fea2 SE |
307 | goto dropped; |
308 | ||
c384ea3e AQ |
309 | /* in case of ARP request, we do not immediately broadcasti the |
310 | * packet, instead we first wait for DAT to try to retrieve the | |
311 | * correct ARP entry | |
312 | */ | |
313 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
314 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
315 | ||
04b482a2 | 316 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
317 | goto dropped; |
318 | ||
96412690 | 319 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
a40d9b07 SW |
320 | bcast_packet->version = BATADV_COMPAT_VERSION; |
321 | bcast_packet->ttl = BATADV_TTL; | |
c6c8fea2 SE |
322 | |
323 | /* batman packet type: broadcast */ | |
a40d9b07 | 324 | bcast_packet->packet_type = BATADV_BCAST; |
162d549c | 325 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
326 | |
327 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
328 | * this mac is known throughout the mesh |
329 | */ | |
8fdd0153 AQ |
330 | ether_addr_copy(bcast_packet->orig, |
331 | primary_if->net_dev->dev_addr); | |
c6c8fea2 SE |
332 | |
333 | /* set broadcast sequence number */ | |
bbb1f90e SE |
334 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
335 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 336 | |
c384ea3e | 337 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); |
c6c8fea2 SE |
338 | |
339 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
340 | * the original skb. |
341 | */ | |
c6c8fea2 SE |
342 | kfree_skb(skb); |
343 | ||
344 | /* unicast packet */ | |
345 | } else { | |
6c413b1c AQ |
346 | /* DHCP packets going to a server will use the GW feature */ |
347 | if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { | |
9d2c9488 | 348 | ret = batadv_gw_out_of_range(bat_priv, skb); |
be7af5cf ML |
349 | if (ret) |
350 | goto dropped; | |
e300d314 | 351 | ret = batadv_send_skb_via_gw(bat_priv, skb, vid); |
1d8ab8d3 LL |
352 | } else if (mcast_single_orig) { |
353 | ret = batadv_send_skb_unicast(bat_priv, skb, | |
354 | BATADV_UNICAST, 0, | |
355 | mcast_single_orig, vid); | |
6c413b1c AQ |
356 | } else { |
357 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, | |
358 | skb)) | |
359 | goto dropped; | |
e300d314 | 360 | |
6c413b1c AQ |
361 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); |
362 | ||
363 | ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, | |
364 | vid); | |
365 | } | |
e300d314 | 366 | if (ret == NET_XMIT_DROP) |
c6c8fea2 SE |
367 | goto dropped_freed; |
368 | } | |
369 | ||
1c9b0550 ML |
370 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
371 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
372 | goto end; |
373 | ||
374 | dropped: | |
375 | kfree_skb(skb); | |
376 | dropped_freed: | |
1c9b0550 | 377 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 378 | end: |
32ae9b22 | 379 | if (primary_if) |
82047ad7 | 380 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
381 | return NETDEV_TX_OK; |
382 | } | |
383 | ||
f298cb94 SE |
384 | /** |
385 | * batadv_interface_rx - receive ethernet frame on local batman-adv interface | |
386 | * @soft_iface: local interface which will receive the ethernet frame | |
387 | * @skb: ethernet frame for @soft_iface | |
f298cb94 SE |
388 | * @hdr_size: size of already parsed batman-adv header |
389 | * @orig_node: originator from which the batman-adv packet was sent | |
390 | * | |
391 | * Sends a ethernet frame to the receive path of the local @soft_iface. | |
392 | * skb->data has still point to the batman-adv header with the size @hdr_size. | |
393 | * The caller has to have parsed this header already and made sure that at least | |
394 | * @hdr_size bytes are still available for pull in @skb. | |
395 | * | |
396 | * The packet may still get dropped. This can happen when the encapsulated | |
397 | * ethernet frame is invalid or contains again an batman-adv packet. Also | |
398 | * unicast packets will be dropped directly when it was sent between two | |
399 | * isolated clients. | |
400 | */ | |
04b482a2 | 401 | void batadv_interface_rx(struct net_device *soft_iface, |
6535db56 SE |
402 | struct sk_buff *skb, int hdr_size, |
403 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 404 | { |
a40d9b07 | 405 | struct batadv_bcast_packet *batadv_bcast_packet; |
c018ad3d | 406 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c018ad3d AQ |
407 | struct vlan_ethhdr *vhdr; |
408 | struct ethhdr *ethhdr; | |
409 | unsigned short vid; | |
2d3f6ccc SW |
410 | bool is_bcast; |
411 | ||
a40d9b07 SW |
412 | batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; |
413 | is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); | |
c6c8fea2 | 414 | |
c6c8fea2 SE |
415 | skb_pull_rcsum(skb, hdr_size); |
416 | skb_reset_mac_header(skb); | |
417 | ||
55883fd1 AQ |
418 | /* clean the netfilter state now that the batman-adv header has been |
419 | * removed | |
420 | */ | |
421 | nf_reset(skb); | |
422 | ||
c7829666 SE |
423 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) |
424 | goto dropped; | |
425 | ||
2b1e2cb3 | 426 | vid = batadv_get_vid(skb, 0); |
7ed4be95 | 427 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
428 | |
429 | switch (ntohs(ethhdr->h_proto)) { | |
430 | case ETH_P_8021Q: | |
c7829666 SE |
431 | if (!pskb_may_pull(skb, VLAN_ETH_HLEN)) |
432 | goto dropped; | |
433 | ||
c6c8fea2 | 434 | vhdr = (struct vlan_ethhdr *)skb->data; |
c6c8fea2 | 435 | |
9d1601ef ML |
436 | /* drop batman-in-batman packets to prevent loops */ |
437 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) | |
c6c8fea2 SE |
438 | break; |
439 | ||
440 | /* fall through */ | |
af5d4f77 | 441 | case ETH_P_BATMAN: |
c6c8fea2 SE |
442 | goto dropped; |
443 | } | |
444 | ||
c6c8fea2 | 445 | /* skb->dev & skb->pkt_type are set here */ |
c6c8fea2 SE |
446 | skb->protocol = eth_type_trans(skb, soft_iface); |
447 | ||
25985edc | 448 | /* should not be necessary anymore as we use skb_pull_rcsum() |
c6c8fea2 | 449 | * TODO: please verify this and remove this TODO |
9cfc7bd6 SE |
450 | * -- Dec 21st 2009, Simon Wunderlich |
451 | */ | |
c6c8fea2 | 452 | |
9cfc7bd6 | 453 | /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ |
c6c8fea2 | 454 | |
1c9b0550 ML |
455 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
456 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
457 | skb->len + ETH_HLEN); | |
c6c8fea2 SE |
458 | |
459 | soft_iface->last_rx = jiffies; | |
460 | ||
74490f96 AQ |
461 | /* Let the bridge loop avoidance check the packet. If will |
462 | * not handle it, we can safely push it up. | |
463 | */ | |
464 | if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) | |
465 | goto out; | |
466 | ||
37135173 AQ |
467 | if (orig_node) |
468 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
c018ad3d | 469 | ethhdr->h_source, vid); |
37135173 | 470 | |
42cb0bef AQ |
471 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
472 | /* set the mark on broadcast packets if AP isolation is ON and | |
473 | * the packet is coming from an "isolated" client | |
474 | */ | |
475 | if (batadv_vlan_ap_isola_get(bat_priv, vid) && | |
476 | batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, | |
477 | vid)) { | |
478 | /* save bits in skb->mark not covered by the mask and | |
479 | * apply the mark on the rest | |
480 | */ | |
481 | skb->mark &= ~bat_priv->isolation_mark_mask; | |
482 | skb->mark |= bat_priv->isolation_mark; | |
483 | } | |
484 | } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, | |
485 | ethhdr->h_dest, vid)) { | |
59b699cd | 486 | goto dropped; |
42cb0bef | 487 | } |
59b699cd | 488 | |
c6c8fea2 | 489 | netif_rx(skb); |
ba85fac2 | 490 | goto out; |
c6c8fea2 SE |
491 | |
492 | dropped: | |
493 | kfree_skb(skb); | |
494 | out: | |
495 | return; | |
496 | } | |
497 | ||
6be4d30c SE |
498 | /** |
499 | * batadv_softif_vlan_release - release vlan from lists and queue for free after | |
500 | * rcu grace period | |
501 | * @ref: kref pointer of the vlan object | |
502 | */ | |
503 | static void batadv_softif_vlan_release(struct kref *ref) | |
504 | { | |
505 | struct batadv_softif_vlan *vlan; | |
506 | ||
507 | vlan = container_of(ref, struct batadv_softif_vlan, refcount); | |
508 | ||
509 | spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
510 | hlist_del_rcu(&vlan->list); | |
511 | spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
512 | ||
513 | kfree_rcu(vlan, rcu); | |
514 | } | |
515 | ||
5d2c05b2 | 516 | /** |
9c3bf081 | 517 | * batadv_softif_vlan_put - decrease the vlan object refcounter and |
6be4d30c | 518 | * possibly release it |
e51f0397 | 519 | * @vlan: the vlan object to release |
5d2c05b2 | 520 | */ |
9c3bf081 | 521 | void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan) |
5d2c05b2 | 522 | { |
354136bc ML |
523 | if (!vlan) |
524 | return; | |
525 | ||
6be4d30c | 526 | kref_put(&vlan->refcount, batadv_softif_vlan_release); |
5d2c05b2 AQ |
527 | } |
528 | ||
529 | /** | |
530 | * batadv_softif_vlan_get - get the vlan object for a specific vid | |
531 | * @bat_priv: the bat priv with all the soft interface information | |
532 | * @vid: the identifier of the vlan object to retrieve | |
533 | * | |
62fe710f | 534 | * Return: the private data of the vlan matching the vid passed as argument or |
5d2c05b2 AQ |
535 | * NULL otherwise. The refcounter of the returned object is incremented by 1. |
536 | */ | |
90f4435d AQ |
537 | struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, |
538 | unsigned short vid) | |
5d2c05b2 AQ |
539 | { |
540 | struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; | |
541 | ||
542 | rcu_read_lock(); | |
543 | hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { | |
544 | if (vlan_tmp->vid != vid) | |
545 | continue; | |
546 | ||
6be4d30c | 547 | if (!kref_get_unless_zero(&vlan_tmp->refcount)) |
5d2c05b2 AQ |
548 | continue; |
549 | ||
550 | vlan = vlan_tmp; | |
551 | break; | |
552 | } | |
553 | rcu_read_unlock(); | |
554 | ||
555 | return vlan; | |
556 | } | |
557 | ||
558 | /** | |
6d030de8 | 559 | * batadv_softif_create_vlan - allocate the needed resources for a new vlan |
5d2c05b2 AQ |
560 | * @bat_priv: the bat priv with all the soft interface information |
561 | * @vid: the VLAN identifier | |
562 | * | |
62fe710f | 563 | * Return: 0 on success, a negative error otherwise. |
5d2c05b2 AQ |
564 | */ |
565 | int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) | |
566 | { | |
567 | struct batadv_softif_vlan *vlan; | |
90f4435d | 568 | int err; |
5d2c05b2 AQ |
569 | |
570 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
571 | if (vlan) { | |
9c3bf081 | 572 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
573 | return -EEXIST; |
574 | } | |
575 | ||
576 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
577 | if (!vlan) | |
578 | return -ENOMEM; | |
579 | ||
35df3b29 | 580 | vlan->bat_priv = bat_priv; |
5d2c05b2 | 581 | vlan->vid = vid; |
6be4d30c | 582 | kref_init(&vlan->refcount); |
5d2c05b2 | 583 | |
b8cbd81d AQ |
584 | atomic_set(&vlan->ap_isolation, 0); |
585 | ||
90f4435d AQ |
586 | err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); |
587 | if (err) { | |
588 | kfree(vlan); | |
589 | return err; | |
590 | } | |
591 | ||
35df3b29 AQ |
592 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
593 | hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); | |
594 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
595 | ||
5d2c05b2 AQ |
596 | /* add a new TT local entry. This one will be marked with the NOPURGE |
597 | * flag | |
598 | */ | |
599 | batadv_tt_local_add(bat_priv->soft_iface, | |
600 | bat_priv->soft_iface->dev_addr, vid, | |
9464d071 | 601 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
5d2c05b2 | 602 | |
5d2c05b2 AQ |
603 | return 0; |
604 | } | |
605 | ||
606 | /** | |
607 | * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object | |
608 | * @bat_priv: the bat priv with all the soft interface information | |
609 | * @vlan: the object to remove | |
610 | */ | |
611 | static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, | |
612 | struct batadv_softif_vlan *vlan) | |
613 | { | |
5d2c05b2 AQ |
614 | /* explicitly remove the associated TT local entry because it is marked |
615 | * with the NOPURGE flag | |
616 | */ | |
617 | batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, | |
618 | vlan->vid, "vlan interface destroyed", false); | |
619 | ||
35df3b29 | 620 | batadv_sysfs_del_vlan(bat_priv, vlan); |
9c3bf081 | 621 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
622 | } |
623 | ||
624 | /** | |
625 | * batadv_interface_add_vid - ndo_add_vid API implementation | |
626 | * @dev: the netdev of the mesh interface | |
7afcbbef | 627 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
628 | * @vid: identifier of the new vlan |
629 | * | |
630 | * Set up all the internal structures for handling the new vlan on top of the | |
631 | * mesh interface | |
632 | * | |
62fe710f | 633 | * Return: 0 on success or a negative error code in case of failure. |
5d2c05b2 AQ |
634 | */ |
635 | static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, | |
636 | unsigned short vid) | |
637 | { | |
638 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
35df3b29 AQ |
639 | struct batadv_softif_vlan *vlan; |
640 | int ret; | |
5d2c05b2 AQ |
641 | |
642 | /* only 802.1Q vlans are supported. | |
643 | * batman-adv does not know how to handle other types | |
644 | */ | |
645 | if (proto != htons(ETH_P_8021Q)) | |
646 | return -EINVAL; | |
647 | ||
648 | vid |= BATADV_VLAN_HAS_TAG; | |
649 | ||
35df3b29 AQ |
650 | /* if a new vlan is getting created and it already exists, it means that |
651 | * it was not deleted yet. batadv_softif_vlan_get() increases the | |
652 | * refcount in order to revive the object. | |
653 | * | |
654 | * if it does not exist then create it. | |
655 | */ | |
656 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
657 | if (!vlan) | |
658 | return batadv_softif_create_vlan(bat_priv, vid); | |
659 | ||
660 | /* recreate the sysfs object if it was already destroyed (and it should | |
661 | * be since we received a kill_vid() for this vlan | |
662 | */ | |
663 | if (!vlan->kobj) { | |
664 | ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); | |
665 | if (ret) { | |
9c3bf081 | 666 | batadv_softif_vlan_put(vlan); |
35df3b29 AQ |
667 | return ret; |
668 | } | |
669 | } | |
670 | ||
671 | /* add a new TT local entry. This one will be marked with the NOPURGE | |
672 | * flag. This must be added again, even if the vlan object already | |
673 | * exists, because the entry was deleted by kill_vid() | |
674 | */ | |
675 | batadv_tt_local_add(bat_priv->soft_iface, | |
676 | bat_priv->soft_iface->dev_addr, vid, | |
677 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); | |
678 | ||
679 | return 0; | |
5d2c05b2 AQ |
680 | } |
681 | ||
682 | /** | |
683 | * batadv_interface_kill_vid - ndo_kill_vid API implementation | |
684 | * @dev: the netdev of the mesh interface | |
7afcbbef | 685 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
686 | * @vid: identifier of the deleted vlan |
687 | * | |
688 | * Destroy all the internal structures used to handle the vlan identified by vid | |
689 | * on top of the mesh interface | |
690 | * | |
62fe710f | 691 | * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q |
5d2c05b2 AQ |
692 | * or -ENOENT if the specified vlan id wasn't registered. |
693 | */ | |
694 | static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, | |
695 | unsigned short vid) | |
696 | { | |
697 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
698 | struct batadv_softif_vlan *vlan; | |
699 | ||
700 | /* only 802.1Q vlans are supported. batman-adv does not know how to | |
701 | * handle other types | |
702 | */ | |
703 | if (proto != htons(ETH_P_8021Q)) | |
704 | return -EINVAL; | |
705 | ||
706 | vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); | |
707 | if (!vlan) | |
708 | return -ENOENT; | |
709 | ||
710 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
711 | ||
712 | /* finally free the vlan object */ | |
9c3bf081 | 713 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
714 | |
715 | return 0; | |
716 | } | |
717 | ||
36c1d153 SE |
718 | /* batman-adv network devices have devices nesting below it and are a special |
719 | * "super class" of normal network devices; split their locks off into a | |
720 | * separate class since they always nest. | |
721 | */ | |
722 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
723 | static struct lock_class_key batadv_netdev_addr_lock_key; | |
724 | ||
725 | /** | |
726 | * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue | |
727 | * @dev: device which owns the tx queue | |
728 | * @txq: tx queue to modify | |
729 | * @_unused: always NULL | |
730 | */ | |
731 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
732 | struct netdev_queue *txq, | |
733 | void *_unused) | |
734 | { | |
735 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
736 | } | |
737 | ||
738 | /** | |
739 | * batadv_set_lockdep_class - Set txq and addr_list lockdep class | |
740 | * @dev: network device to modify | |
741 | */ | |
742 | static void batadv_set_lockdep_class(struct net_device *dev) | |
743 | { | |
744 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); | |
745 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); | |
746 | } | |
747 | ||
5bc44dc8 SW |
748 | /** |
749 | * batadv_softif_destroy_finish - cleans up the remains of a softif | |
750 | * @work: work queue item | |
751 | * | |
752 | * Free the parts of the soft interface which can not be removed under | |
753 | * rtnl lock (to prevent deadlock situations). | |
754 | */ | |
755 | static void batadv_softif_destroy_finish(struct work_struct *work) | |
756 | { | |
5d2c05b2 | 757 | struct batadv_softif_vlan *vlan; |
5bc44dc8 SW |
758 | struct batadv_priv *bat_priv; |
759 | struct net_device *soft_iface; | |
760 | ||
761 | bat_priv = container_of(work, struct batadv_priv, | |
762 | cleanup_work); | |
763 | soft_iface = bat_priv->soft_iface; | |
764 | ||
5d2c05b2 AQ |
765 | /* destroy the "untagged" VLAN */ |
766 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
767 | if (vlan) { | |
768 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
9c3bf081 | 769 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
770 | } |
771 | ||
5bc44dc8 | 772 | batadv_sysfs_del_meshif(soft_iface); |
af63fde5 | 773 | unregister_netdev(soft_iface); |
5bc44dc8 SW |
774 | } |
775 | ||
37130293 SE |
776 | /** |
777 | * batadv_softif_init_late - late stage initialization of soft interface | |
778 | * @dev: registered network device to modify | |
779 | * | |
62fe710f | 780 | * Return: error code on failures |
37130293 SE |
781 | */ |
782 | static int batadv_softif_init_late(struct net_device *dev) | |
c6c8fea2 | 783 | { |
56303d34 | 784 | struct batadv_priv *bat_priv; |
6b5e971a | 785 | u32 random_seqno; |
c6c8fea2 | 786 | int ret; |
6b5e971a | 787 | size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM; |
c6c8fea2 | 788 | |
37130293 | 789 | batadv_set_lockdep_class(dev); |
c6c8fea2 | 790 | |
37130293 SE |
791 | bat_priv = netdev_priv(dev); |
792 | bat_priv->soft_iface = dev; | |
5bc44dc8 | 793 | INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); |
1c9b0550 ML |
794 | |
795 | /* batadv_interface_stats() needs to be available as soon as | |
796 | * register_netdevice() has been called | |
797 | */ | |
6b5e971a | 798 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64)); |
1c9b0550 | 799 | if (!bat_priv->bat_counters) |
37130293 | 800 | return -ENOMEM; |
c6c8fea2 | 801 | |
c6c8fea2 SE |
802 | atomic_set(&bat_priv->aggregated_ogms, 1); |
803 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 804 | #ifdef CONFIG_BATMAN_ADV_BLA |
dab7b621 | 805 | atomic_set(&bat_priv->bridge_loop_avoidance, 1); |
fa706554 | 806 | #endif |
33af49ad AQ |
807 | #ifdef CONFIG_BATMAN_ADV_DAT |
808 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
60432d75 LL |
809 | #endif |
810 | #ifdef CONFIG_BATMAN_ADV_MCAST | |
811 | bat_priv->mcast.flags = BATADV_NO_FLAGS; | |
1d8ab8d3 | 812 | atomic_set(&bat_priv->multicast_mode, 1); |
60432d75 | 813 | atomic_set(&bat_priv->mcast.num_disabled, 0); |
ab49886e | 814 | atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); |
4c8755d6 LL |
815 | atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); |
816 | atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); | |
33af49ad | 817 | #endif |
cd646ab1 | 818 | atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); |
c6c8fea2 | 819 | atomic_set(&bat_priv->gw_sel_class, 20); |
414254e3 ML |
820 | atomic_set(&bat_priv->gw.bandwidth_down, 100); |
821 | atomic_set(&bat_priv->gw.bandwidth_up, 20); | |
c6c8fea2 | 822 | atomic_set(&bat_priv->orig_interval, 1000); |
e03366ea | 823 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 824 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 825 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 826 | #endif |
c6c8fea2 | 827 | atomic_set(&bat_priv->fragmentation, 1); |
a19d3d85 | 828 | atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN); |
42d0b044 SE |
829 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
830 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 831 | |
39c75a51 | 832 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 833 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
834 | atomic_set(&bat_priv->tt.vn, 0); |
835 | atomic_set(&bat_priv->tt.local_changes, 0); | |
836 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
837 | #ifdef CONFIG_BATMAN_ADV_BLA | |
838 | atomic_set(&bat_priv->bla.num_requests, 0); | |
839 | #endif | |
840 | bat_priv->tt.last_changeset = NULL; | |
841 | bat_priv->tt.last_changeset_len = 0; | |
c42edfe3 AQ |
842 | bat_priv->isolation_mark = 0; |
843 | bat_priv->isolation_mark_mask = 0; | |
c6c8fea2 | 844 | |
ee75ed88 MH |
845 | /* randomize initial seqno to avoid collision */ |
846 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
847 | atomic_set(&bat_priv->frag_seqno, random_seqno); | |
848 | ||
c6c8fea2 SE |
849 | bat_priv->primary_if = NULL; |
850 | bat_priv->num_ifaces = 0; | |
c6c8fea2 | 851 | |
d353d8d4 MH |
852 | batadv_nc_init_bat_priv(bat_priv); |
853 | ||
37130293 | 854 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 855 | if (ret < 0) |
37130293 | 856 | goto free_bat_counters; |
c6c8fea2 | 857 | |
37130293 | 858 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 859 | if (ret < 0) |
37130293 | 860 | goto free_bat_counters; |
c6c8fea2 | 861 | |
37130293 | 862 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
863 | if (ret < 0) |
864 | goto unreg_debugfs; | |
865 | ||
37130293 | 866 | return 0; |
c6c8fea2 SE |
867 | |
868 | unreg_debugfs: | |
37130293 | 869 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
870 | free_bat_counters: |
871 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 872 | bat_priv->bat_counters = NULL; |
37130293 SE |
873 | |
874 | return ret; | |
875 | } | |
876 | ||
3dbd550b SE |
877 | /** |
878 | * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface | |
879 | * @dev: batadv_soft_interface used as master interface | |
880 | * @slave_dev: net_device which should become the slave interface | |
881 | * | |
62fe710f | 882 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
883 | */ |
884 | static int batadv_softif_slave_add(struct net_device *dev, | |
885 | struct net_device *slave_dev) | |
886 | { | |
887 | struct batadv_hard_iface *hard_iface; | |
2cd45a06 | 888 | struct net *net = dev_net(dev); |
3dbd550b SE |
889 | int ret = -EINVAL; |
890 | ||
891 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
00f548bf | 892 | if (!hard_iface || hard_iface->soft_iface) |
3dbd550b SE |
893 | goto out; |
894 | ||
2cd45a06 | 895 | ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); |
3dbd550b SE |
896 | |
897 | out: | |
898 | if (hard_iface) | |
82047ad7 | 899 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
900 | return ret; |
901 | } | |
902 | ||
903 | /** | |
904 | * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface | |
905 | * @dev: batadv_soft_interface used as master interface | |
906 | * @slave_dev: net_device which should be removed from the master interface | |
907 | * | |
62fe710f | 908 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
909 | */ |
910 | static int batadv_softif_slave_del(struct net_device *dev, | |
911 | struct net_device *slave_dev) | |
912 | { | |
913 | struct batadv_hard_iface *hard_iface; | |
914 | int ret = -EINVAL; | |
915 | ||
916 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
917 | ||
918 | if (!hard_iface || hard_iface->soft_iface != dev) | |
919 | goto out; | |
920 | ||
921 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
922 | ret = 0; | |
923 | ||
924 | out: | |
925 | if (hard_iface) | |
82047ad7 | 926 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
927 | return ret; |
928 | } | |
929 | ||
37130293 SE |
930 | static const struct net_device_ops batadv_netdev_ops = { |
931 | .ndo_init = batadv_softif_init_late, | |
932 | .ndo_open = batadv_interface_open, | |
933 | .ndo_stop = batadv_interface_release, | |
934 | .ndo_get_stats = batadv_interface_stats, | |
5d2c05b2 AQ |
935 | .ndo_vlan_rx_add_vid = batadv_interface_add_vid, |
936 | .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, | |
37130293 SE |
937 | .ndo_set_mac_address = batadv_interface_set_mac_addr, |
938 | .ndo_change_mtu = batadv_interface_change_mtu, | |
a4deee1a | 939 | .ndo_set_rx_mode = batadv_interface_set_rx_mode, |
37130293 | 940 | .ndo_start_xmit = batadv_interface_tx, |
3dbd550b SE |
941 | .ndo_validate_addr = eth_validate_addr, |
942 | .ndo_add_slave = batadv_softif_slave_add, | |
943 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
944 | }; |
945 | ||
b3246020 SE |
946 | /** |
947 | * batadv_softif_free - Deconstructor of batadv_soft_interface | |
948 | * @dev: Device to cleanup and remove | |
949 | */ | |
950 | static void batadv_softif_free(struct net_device *dev) | |
951 | { | |
952 | batadv_debugfs_del_meshif(dev); | |
953 | batadv_mesh_free(dev); | |
0c501345 AQ |
954 | |
955 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
956 | * their tasks. Wait for them all to be finished before freeing the | |
957 | * netdev and its private data (bat_priv) | |
958 | */ | |
959 | rcu_barrier(); | |
960 | ||
b3246020 SE |
961 | free_netdev(dev); |
962 | } | |
963 | ||
37130293 SE |
964 | /** |
965 | * batadv_softif_init_early - early stage initialization of soft interface | |
966 | * @dev: registered network device to modify | |
967 | */ | |
968 | static void batadv_softif_init_early(struct net_device *dev) | |
969 | { | |
970 | struct batadv_priv *priv = netdev_priv(dev); | |
971 | ||
972 | ether_setup(dev); | |
973 | ||
974 | dev->netdev_ops = &batadv_netdev_ops; | |
b3246020 | 975 | dev->destructor = batadv_softif_free; |
0d21cdaa | 976 | dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL; |
cdf73703 | 977 | dev->priv_flags |= IFF_NO_QUEUE; |
37130293 SE |
978 | |
979 | /* can't call min_mtu, because the needed variables | |
980 | * have not been initialized yet | |
981 | */ | |
982 | dev->mtu = ETH_DATA_LEN; | |
37130293 SE |
983 | |
984 | /* generate random address */ | |
985 | eth_hw_addr_random(dev); | |
986 | ||
7ad24ea4 | 987 | dev->ethtool_ops = &batadv_ethtool_ops; |
37130293 SE |
988 | |
989 | memset(priv, 0, sizeof(*priv)); | |
990 | } | |
991 | ||
2cd45a06 | 992 | struct net_device *batadv_softif_create(struct net *net, const char *name) |
37130293 SE |
993 | { |
994 | struct net_device *soft_iface; | |
995 | int ret; | |
996 | ||
997 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
c835a677 | 998 | NET_NAME_UNKNOWN, batadv_softif_init_early); |
37130293 SE |
999 | if (!soft_iface) |
1000 | return NULL; | |
1001 | ||
2cd45a06 AL |
1002 | dev_net_set(soft_iface, net); |
1003 | ||
a4ac28c0 SE |
1004 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
1005 | ||
37130293 SE |
1006 | ret = register_netdevice(soft_iface); |
1007 | if (ret < 0) { | |
1008 | pr_err("Unable to register the batman interface '%s': %i\n", | |
1009 | name, ret); | |
1010 | free_netdev(soft_iface); | |
1011 | return NULL; | |
1012 | } | |
1013 | ||
1014 | return soft_iface; | |
c6c8fea2 SE |
1015 | } |
1016 | ||
e07932ae ML |
1017 | /** |
1018 | * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs | |
1019 | * @soft_iface: the to-be-removed batman-adv interface | |
1020 | */ | |
1021 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 1022 | { |
5bc44dc8 SW |
1023 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
1024 | ||
5bc44dc8 | 1025 | queue_work(batadv_event_workqueue, &bat_priv->cleanup_work); |
c6c8fea2 SE |
1026 | } |
1027 | ||
a4ac28c0 SE |
1028 | /** |
1029 | * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink | |
1030 | * @soft_iface: the to-be-removed batman-adv interface | |
1031 | * @head: list pointer | |
1032 | */ | |
1033 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
1034 | struct list_head *head) | |
1035 | { | |
420cb1b7 | 1036 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
a4ac28c0 | 1037 | struct batadv_hard_iface *hard_iface; |
420cb1b7 | 1038 | struct batadv_softif_vlan *vlan; |
a4ac28c0 SE |
1039 | |
1040 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
1041 | if (hard_iface->soft_iface == soft_iface) | |
1042 | batadv_hardif_disable_interface(hard_iface, | |
1043 | BATADV_IF_CLEANUP_KEEP); | |
1044 | } | |
1045 | ||
420cb1b7 SE |
1046 | /* destroy the "untagged" VLAN */ |
1047 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1048 | if (vlan) { | |
1049 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1050 | batadv_softif_vlan_put(vlan); | |
1051 | } | |
1052 | ||
a4ac28c0 SE |
1053 | batadv_sysfs_del_meshif(soft_iface); |
1054 | unregister_netdevice_queue(soft_iface, head); | |
1055 | } | |
1056 | ||
4b426b10 | 1057 | bool batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 1058 | { |
0294ca0d | 1059 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
4b426b10 | 1060 | return true; |
e44d8fe2 | 1061 | |
4b426b10 | 1062 | return false; |
e44d8fe2 SE |
1063 | } |
1064 | ||
a4ac28c0 SE |
1065 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
1066 | .kind = "batadv", | |
1067 | .priv_size = sizeof(struct batadv_priv), | |
1068 | .setup = batadv_softif_init_early, | |
1069 | .dellink = batadv_softif_destroy_netlink, | |
1070 | }; | |
1071 | ||
c6c8fea2 | 1072 | /* ethtool */ |
0294ca0d | 1073 | static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
c6c8fea2 SE |
1074 | { |
1075 | cmd->supported = 0; | |
1076 | cmd->advertising = 0; | |
70739497 | 1077 | ethtool_cmd_speed_set(cmd, SPEED_10); |
c6c8fea2 SE |
1078 | cmd->duplex = DUPLEX_FULL; |
1079 | cmd->port = PORT_TP; | |
1080 | cmd->phy_address = 0; | |
1081 | cmd->transceiver = XCVR_INTERNAL; | |
1082 | cmd->autoneg = AUTONEG_DISABLE; | |
1083 | cmd->maxtxpkt = 0; | |
1084 | cmd->maxrxpkt = 0; | |
1085 | ||
1086 | return 0; | |
1087 | } | |
1088 | ||
0294ca0d SE |
1089 | static void batadv_get_drvinfo(struct net_device *dev, |
1090 | struct ethtool_drvinfo *info) | |
c6c8fea2 | 1091 | { |
7826d43f JP |
1092 | strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); |
1093 | strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
1094 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
1095 | strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
c6c8fea2 SE |
1096 | } |
1097 | ||
0294ca0d | 1098 | static u32 batadv_get_msglevel(struct net_device *dev) |
c6c8fea2 SE |
1099 | { |
1100 | return -EOPNOTSUPP; | |
1101 | } | |
1102 | ||
0294ca0d | 1103 | static void batadv_set_msglevel(struct net_device *dev, u32 value) |
c6c8fea2 SE |
1104 | { |
1105 | } | |
1106 | ||
0294ca0d | 1107 | static u32 batadv_get_link(struct net_device *dev) |
c6c8fea2 SE |
1108 | { |
1109 | return 1; | |
1110 | } | |
f8214865 MH |
1111 | |
1112 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
1113 | * Declare each description string in struct.name[] to get fixed sized buffer | |
1114 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
1115 | */ | |
1116 | static const struct { | |
1117 | const char name[ETH_GSTRING_LEN]; | |
0294ca0d | 1118 | } batadv_counters_strings[] = { |
1c9b0550 ML |
1119 | { "tx" }, |
1120 | { "tx_bytes" }, | |
1121 | { "tx_dropped" }, | |
1122 | { "rx" }, | |
1123 | { "rx_bytes" }, | |
f8214865 MH |
1124 | { "forward" }, |
1125 | { "forward_bytes" }, | |
1126 | { "mgmt_tx" }, | |
1127 | { "mgmt_tx_bytes" }, | |
1128 | { "mgmt_rx" }, | |
1129 | { "mgmt_rx_bytes" }, | |
ee75ed88 MH |
1130 | { "frag_tx" }, |
1131 | { "frag_tx_bytes" }, | |
610bfc6b MH |
1132 | { "frag_rx" }, |
1133 | { "frag_rx_bytes" }, | |
1134 | { "frag_fwd" }, | |
1135 | { "frag_fwd_bytes" }, | |
f8214865 MH |
1136 | { "tt_request_tx" }, |
1137 | { "tt_request_rx" }, | |
1138 | { "tt_response_tx" }, | |
1139 | { "tt_response_rx" }, | |
1140 | { "tt_roam_adv_tx" }, | |
1141 | { "tt_roam_adv_rx" }, | |
4046b24a MH |
1142 | #ifdef CONFIG_BATMAN_ADV_DAT |
1143 | { "dat_get_tx" }, | |
1144 | { "dat_get_rx" }, | |
1145 | { "dat_put_tx" }, | |
1146 | { "dat_put_rx" }, | |
1147 | { "dat_cached_reply_tx" }, | |
1148 | #endif | |
3c12de9a MH |
1149 | #ifdef CONFIG_BATMAN_ADV_NC |
1150 | { "nc_code" }, | |
1151 | { "nc_code_bytes" }, | |
1152 | { "nc_recode" }, | |
1153 | { "nc_recode_bytes" }, | |
612d2b4f | 1154 | { "nc_buffer" }, |
2df5278b MH |
1155 | { "nc_decode" }, |
1156 | { "nc_decode_bytes" }, | |
1157 | { "nc_decode_failed" }, | |
1158 | { "nc_sniffed" }, | |
3c12de9a | 1159 | #endif |
f8214865 MH |
1160 | }; |
1161 | ||
6b5e971a | 1162 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
f8214865 MH |
1163 | { |
1164 | if (stringset == ETH_SS_STATS) | |
0294ca0d SE |
1165 | memcpy(data, batadv_counters_strings, |
1166 | sizeof(batadv_counters_strings)); | |
f8214865 MH |
1167 | } |
1168 | ||
1169 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
6b5e971a | 1170 | struct ethtool_stats *stats, u64 *data) |
f8214865 | 1171 | { |
56303d34 | 1172 | struct batadv_priv *bat_priv = netdev_priv(dev); |
f8214865 MH |
1173 | int i; |
1174 | ||
d69909d2 | 1175 | for (i = 0; i < BATADV_CNT_NUM; i++) |
f8214865 MH |
1176 | data[i] = batadv_sum_counter(bat_priv, i); |
1177 | } | |
1178 | ||
1179 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
1180 | { | |
1181 | if (stringset == ETH_SS_STATS) | |
d69909d2 | 1182 | return BATADV_CNT_NUM; |
f8214865 MH |
1183 | |
1184 | return -EOPNOTSUPP; | |
1185 | } |