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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
7a79d717 | 2 | /* Copyright (C) 2007-2019 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public | |
8 | * License as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
17 | */ |
18 | ||
c6c8fea2 | 19 | #include "soft-interface.h" |
1e2c2a4f SE |
20 | #include "main.h" |
21 | ||
22 | #include <linux/atomic.h> | |
23 | #include <linux/byteorder/generic.h> | |
24 | #include <linux/cache.h> | |
25 | #include <linux/compiler.h> | |
c408c1b9 | 26 | #include <linux/cpumask.h> |
1e2c2a4f | 27 | #include <linux/errno.h> |
c6c8fea2 | 28 | #include <linux/etherdevice.h> |
1e2c2a4f | 29 | #include <linux/ethtool.h> |
b92b94ac | 30 | #include <linux/gfp.h> |
1e2c2a4f | 31 | #include <linux/if_ether.h> |
c6c8fea2 | 32 | #include <linux/if_vlan.h> |
1e2c2a4f SE |
33 | #include <linux/jiffies.h> |
34 | #include <linux/kernel.h> | |
6be4d30c | 35 | #include <linux/kref.h> |
1e2c2a4f SE |
36 | #include <linux/list.h> |
37 | #include <linux/lockdep.h> | |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/percpu.h> | |
40 | #include <linux/printk.h> | |
41 | #include <linux/random.h> | |
42 | #include <linux/rculist.h> | |
43 | #include <linux/rcupdate.h> | |
569c9850 | 44 | #include <linux/rtnetlink.h> |
1e2c2a4f SE |
45 | #include <linux/skbuff.h> |
46 | #include <linux/slab.h> | |
47 | #include <linux/socket.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/stddef.h> | |
50 | #include <linux/string.h> | |
51 | #include <linux/types.h> | |
fec149f5 | 52 | #include <uapi/linux/batadv_packet.h> |
e2d0d35b | 53 | #include <uapi/linux/batman_adv.h> |
1e2c2a4f | 54 | |
01d350d1 | 55 | #include "bat_algo.h" |
23721387 | 56 | #include "bridge_loop_avoidance.h" |
1e2c2a4f SE |
57 | #include "debugfs.h" |
58 | #include "distributed-arp-table.h" | |
59 | #include "gateway_client.h" | |
1e2c2a4f SE |
60 | #include "hard-interface.h" |
61 | #include "multicast.h" | |
d353d8d4 | 62 | #include "network-coding.h" |
f19dc777 | 63 | #include "originator.h" |
1e2c2a4f SE |
64 | #include "send.h" |
65 | #include "sysfs.h" | |
66 | #include "translation-table.h" | |
c6c8fea2 | 67 | |
ff15c27c SE |
68 | /** |
69 | * batadv_skb_head_push() - Increase header size and move (push) head pointer | |
70 | * @skb: packet buffer which should be modified | |
71 | * @len: number of bytes to add | |
72 | * | |
73 | * Return: 0 on success or negative error number in case of failure | |
74 | */ | |
04b482a2 | 75 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
76 | { |
77 | int result; | |
78 | ||
9cfc7bd6 | 79 | /* TODO: We must check if we can release all references to non-payload |
48915aed SE |
80 | * data using __skb_header_release in our skbs to allow skb_cow_header |
81 | * to work optimally. This means that those skbs are not allowed to read | |
c6c8fea2 SE |
82 | * or write any data which is before the current position of skb->data |
83 | * after that call and thus allow other skbs with the same data buffer | |
84 | * to write freely in that area. | |
85 | */ | |
86 | result = skb_cow_head(skb, len); | |
87 | if (result < 0) | |
88 | return result; | |
89 | ||
90 | skb_push(skb, len); | |
91 | return 0; | |
92 | } | |
93 | ||
0294ca0d | 94 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
95 | { |
96 | netif_start_queue(dev); | |
97 | return 0; | |
98 | } | |
99 | ||
0294ca0d | 100 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
101 | { |
102 | netif_stop_queue(dev); | |
103 | return 0; | |
104 | } | |
105 | ||
c408c1b9 | 106 | /** |
7e9a8c2c | 107 | * batadv_sum_counter() - Sum the cpu-local counters for index 'idx' |
c408c1b9 SE |
108 | * @bat_priv: the bat priv with all the soft interface information |
109 | * @idx: index of counter to sum up | |
110 | * | |
111 | * Return: sum of all cpu-local counters | |
112 | */ | |
113 | static u64 batadv_sum_counter(struct batadv_priv *bat_priv, size_t idx) | |
114 | { | |
115 | u64 *counters, sum = 0; | |
116 | int cpu; | |
117 | ||
118 | for_each_possible_cpu(cpu) { | |
119 | counters = per_cpu_ptr(bat_priv->bat_counters, cpu); | |
120 | sum += counters[idx]; | |
121 | } | |
122 | ||
123 | return sum; | |
124 | } | |
125 | ||
0294ca0d | 126 | static struct net_device_stats *batadv_interface_stats(struct net_device *dev) |
c6c8fea2 | 127 | { |
56303d34 | 128 | struct batadv_priv *bat_priv = netdev_priv(dev); |
ab044f8e | 129 | struct net_device_stats *stats = &dev->stats; |
1c9b0550 ML |
130 | |
131 | stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); | |
132 | stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); | |
133 | stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); | |
134 | stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); | |
135 | stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); | |
136 | return stats; | |
c6c8fea2 SE |
137 | } |
138 | ||
0294ca0d | 139 | static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) |
c6c8fea2 | 140 | { |
56303d34 | 141 | struct batadv_priv *bat_priv = netdev_priv(dev); |
94d1dd87 | 142 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 143 | struct sockaddr *addr = p; |
6b5e971a | 144 | u8 old_addr[ETH_ALEN]; |
c6c8fea2 SE |
145 | |
146 | if (!is_valid_ether_addr(addr->sa_data)) | |
147 | return -EADDRNOTAVAIL; | |
148 | ||
8fdd0153 AQ |
149 | ether_addr_copy(old_addr, dev->dev_addr); |
150 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
40a3eb33 | 151 | |
015758d0 | 152 | /* only modify transtable if it has been initialized before */ |
94d1dd87 AQ |
153 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
154 | return 0; | |
155 | ||
156 | rcu_read_lock(); | |
157 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
158 | batadv_tt_local_remove(bat_priv, old_addr, vlan->vid, | |
08c36d3e | 159 | "mac address changed", false); |
94d1dd87 | 160 | batadv_tt_local_add(dev, addr->sa_data, vlan->vid, |
9464d071 | 161 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
c6c8fea2 | 162 | } |
94d1dd87 | 163 | rcu_read_unlock(); |
c6c8fea2 | 164 | |
c6c8fea2 SE |
165 | return 0; |
166 | } | |
167 | ||
0294ca0d | 168 | static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) |
c6c8fea2 SE |
169 | { |
170 | /* check ranges */ | |
825ffe1f | 171 | if (new_mtu < 68 || new_mtu > batadv_hardif_min_mtu(dev)) |
c6c8fea2 SE |
172 | return -EINVAL; |
173 | ||
174 | dev->mtu = new_mtu; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
a4deee1a | 179 | /** |
7e9a8c2c | 180 | * batadv_interface_set_rx_mode() - set the rx mode of a device |
a4deee1a LL |
181 | * @dev: registered network device to modify |
182 | * | |
183 | * We do not actually need to set any rx filters for the virtual batman | |
184 | * soft interface. However a dummy handler enables a user to set static | |
185 | * multicast listeners for instance. | |
186 | */ | |
187 | static void batadv_interface_set_rx_mode(struct net_device *dev) | |
188 | { | |
189 | } | |
190 | ||
6bf9e4d3 LVO |
191 | static netdev_tx_t batadv_interface_tx(struct sk_buff *skb, |
192 | struct net_device *soft_iface) | |
c6c8fea2 | 193 | { |
c018ad3d | 194 | struct ethhdr *ethhdr; |
56303d34 SE |
195 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
196 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 197 | struct batadv_bcast_packet *bcast_packet; |
6b5e971a SE |
198 | static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, |
199 | 0x00, 0x00}; | |
200 | static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, | |
201 | 0x00, 0x00}; | |
6c413b1c | 202 | enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; |
6b5e971a | 203 | u8 *dst_hint = NULL, chaddr[ETH_ALEN]; |
c018ad3d | 204 | struct vlan_ethhdr *vhdr; |
be7af5cf | 205 | unsigned int header_len = 0; |
c6c8fea2 | 206 | int data_len = skb->len, ret; |
c018ad3d | 207 | unsigned long brd_delay = 1; |
a19d3d85 | 208 | bool do_bcast = false, client_added; |
c018ad3d | 209 | unsigned short vid; |
6b5e971a | 210 | u32 seqno; |
6c413b1c | 211 | int gw_mode; |
1d8ab8d3 LL |
212 | enum batadv_forw_mode forw_mode; |
213 | struct batadv_orig_node *mcast_single_orig = NULL; | |
53cf037b | 214 | int network_offset = ETH_HLEN; |
b61ec31c | 215 | __be16 proto; |
c6c8fea2 | 216 | |
39c75a51 | 217 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
218 | goto dropped; |
219 | ||
e2d9ba43 LL |
220 | /* reset control block to avoid left overs from previous users */ |
221 | memset(skb->cb, 0, sizeof(struct batadv_skb_cb)); | |
222 | ||
860e9538 | 223 | netif_trans_update(soft_iface); |
c018ad3d | 224 | vid = batadv_get_vid(skb, 0); |
9114daa8 SE |
225 | |
226 | skb_reset_mac_header(skb); | |
927c2ed7 | 227 | ethhdr = eth_hdr(skb); |
c6c8fea2 | 228 | |
b61ec31c LL |
229 | proto = ethhdr->h_proto; |
230 | ||
231 | switch (ntohs(proto)) { | |
c6c8fea2 | 232 | case ETH_P_8021Q: |
4ffcbfac ED |
233 | if (!pskb_may_pull(skb, sizeof(*vhdr))) |
234 | goto dropped; | |
927c2ed7 | 235 | vhdr = vlan_eth_hdr(skb); |
b61ec31c | 236 | proto = vhdr->h_vlan_encapsulated_proto; |
c6c8fea2 | 237 | |
9d1601ef | 238 | /* drop batman-in-batman packets to prevent loops */ |
b61ec31c | 239 | if (proto != htons(ETH_P_BATMAN)) { |
53cf037b | 240 | network_offset += VLAN_HLEN; |
c6c8fea2 | 241 | break; |
53cf037b | 242 | } |
c6c8fea2 SE |
243 | |
244 | /* fall through */ | |
af5d4f77 | 245 | case ETH_P_BATMAN: |
c6c8fea2 | 246 | goto dropped; |
a7f6ee94 | 247 | } |
c6c8fea2 | 248 | |
53cf037b LL |
249 | skb_set_network_header(skb, network_offset); |
250 | ||
08adf151 | 251 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
252 | goto dropped; |
253 | ||
9d2c9488 | 254 | /* skb->data might have been reallocated by batadv_bla_tx() */ |
927c2ed7 | 255 | ethhdr = eth_hdr(skb); |
9d2c9488 | 256 | |
a73105b8 | 257 | /* Register the client MAC in the transtable */ |
d3e9768a SW |
258 | if (!is_multicast_ether_addr(ethhdr->h_source) && |
259 | !batadv_bla_is_loopdetect_mac(ethhdr->h_source)) { | |
a19d3d85 | 260 | client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, |
9464d071 AQ |
261 | vid, skb->skb_iif, |
262 | skb->mark); | |
a19d3d85 ML |
263 | if (!client_added) |
264 | goto dropped; | |
265 | } | |
c6c8fea2 | 266 | |
b61ec31c LL |
267 | /* Snoop address candidates from DHCPACKs for early DAT filling */ |
268 | batadv_dat_snoop_outgoing_dhcp_ack(bat_priv, skb, proto, vid); | |
269 | ||
b1a8c04b SW |
270 | /* don't accept stp packets. STP does not help in meshes. |
271 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
272 | * |
273 | * The same goes for ECTP sent at least by some Cisco Switches, | |
274 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 275 | */ |
1eda58bf | 276 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
277 | goto dropped; |
278 | ||
4934ab95 SW |
279 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
280 | goto dropped; | |
281 | ||
3a24a63e | 282 | gw_mode = atomic_read(&bat_priv->gw.mode); |
be7af5cf | 283 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
6c413b1c AQ |
284 | /* if gw mode is off, broadcast every packet */ |
285 | if (gw_mode == BATADV_GW_MODE_OFF) { | |
286 | do_bcast = true; | |
287 | goto send; | |
be7af5cf | 288 | } |
9d2c9488 | 289 | |
6c413b1c AQ |
290 | dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, |
291 | chaddr); | |
292 | /* skb->data may have been modified by | |
293 | * batadv_gw_dhcp_recipient_get() | |
9d2c9488 | 294 | */ |
927c2ed7 | 295 | ethhdr = eth_hdr(skb); |
6c413b1c AQ |
296 | /* if gw_mode is on, broadcast any non-DHCP message. |
297 | * All the DHCP packets are going to be sent as unicast | |
298 | */ | |
299 | if (dhcp_rcp == BATADV_DHCP_NO) { | |
300 | do_bcast = true; | |
301 | goto send; | |
302 | } | |
303 | ||
304 | if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) | |
305 | dst_hint = chaddr; | |
306 | else if ((gw_mode == BATADV_GW_MODE_SERVER) && | |
307 | (dhcp_rcp == BATADV_DHCP_TO_SERVER)) | |
308 | /* gateways should not forward any DHCP message if | |
309 | * directed to a DHCP server | |
310 | */ | |
311 | goto dropped; | |
c6c8fea2 | 312 | |
6c413b1c | 313 | send: |
1d8ab8d3 LL |
314 | if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { |
315 | forw_mode = batadv_mcast_forw_mode(bat_priv, skb, | |
316 | &mcast_single_orig); | |
317 | if (forw_mode == BATADV_FORW_NONE) | |
318 | goto dropped; | |
319 | ||
320 | if (forw_mode == BATADV_FORW_SINGLE) | |
321 | do_bcast = false; | |
322 | } | |
323 | } | |
324 | ||
c54f38c9 SW |
325 | batadv_skb_set_priority(skb, 0); |
326 | ||
c6c8fea2 SE |
327 | /* ethernet packet should be broadcasted */ |
328 | if (do_bcast) { | |
e5d89254 | 329 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 330 | if (!primary_if) |
c6c8fea2 SE |
331 | goto dropped; |
332 | ||
c384ea3e AQ |
333 | /* in case of ARP request, we do not immediately broadcasti the |
334 | * packet, instead we first wait for DAT to try to retrieve the | |
335 | * correct ARP entry | |
336 | */ | |
337 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
338 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
339 | ||
04b482a2 | 340 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
341 | goto dropped; |
342 | ||
96412690 | 343 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
a40d9b07 SW |
344 | bcast_packet->version = BATADV_COMPAT_VERSION; |
345 | bcast_packet->ttl = BATADV_TTL; | |
c6c8fea2 SE |
346 | |
347 | /* batman packet type: broadcast */ | |
a40d9b07 | 348 | bcast_packet->packet_type = BATADV_BCAST; |
162d549c | 349 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
350 | |
351 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
352 | * this mac is known throughout the mesh |
353 | */ | |
8fdd0153 AQ |
354 | ether_addr_copy(bcast_packet->orig, |
355 | primary_if->net_dev->dev_addr); | |
c6c8fea2 SE |
356 | |
357 | /* set broadcast sequence number */ | |
bbb1f90e SE |
358 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
359 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 360 | |
3111beed | 361 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay, true); |
c6c8fea2 SE |
362 | |
363 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
364 | * the original skb. |
365 | */ | |
bd687fe4 | 366 | consume_skb(skb); |
c6c8fea2 SE |
367 | |
368 | /* unicast packet */ | |
369 | } else { | |
6c413b1c AQ |
370 | /* DHCP packets going to a server will use the GW feature */ |
371 | if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { | |
9d2c9488 | 372 | ret = batadv_gw_out_of_range(bat_priv, skb); |
be7af5cf ML |
373 | if (ret) |
374 | goto dropped; | |
e300d314 | 375 | ret = batadv_send_skb_via_gw(bat_priv, skb, vid); |
1d8ab8d3 LL |
376 | } else if (mcast_single_orig) { |
377 | ret = batadv_send_skb_unicast(bat_priv, skb, | |
378 | BATADV_UNICAST, 0, | |
379 | mcast_single_orig, vid); | |
6c413b1c AQ |
380 | } else { |
381 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, | |
382 | skb)) | |
383 | goto dropped; | |
e300d314 | 384 | |
6c413b1c AQ |
385 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); |
386 | ||
387 | ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, | |
388 | vid); | |
389 | } | |
eaac2c87 | 390 | if (ret != NET_XMIT_SUCCESS) |
c6c8fea2 SE |
391 | goto dropped_freed; |
392 | } | |
393 | ||
1c9b0550 ML |
394 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
395 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
396 | goto end; |
397 | ||
398 | dropped: | |
399 | kfree_skb(skb); | |
400 | dropped_freed: | |
1c9b0550 | 401 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 402 | end: |
f19dc777 SE |
403 | if (mcast_single_orig) |
404 | batadv_orig_node_put(mcast_single_orig); | |
32ae9b22 | 405 | if (primary_if) |
82047ad7 | 406 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
407 | return NETDEV_TX_OK; |
408 | } | |
409 | ||
f298cb94 | 410 | /** |
7e9a8c2c | 411 | * batadv_interface_rx() - receive ethernet frame on local batman-adv interface |
f298cb94 SE |
412 | * @soft_iface: local interface which will receive the ethernet frame |
413 | * @skb: ethernet frame for @soft_iface | |
f298cb94 SE |
414 | * @hdr_size: size of already parsed batman-adv header |
415 | * @orig_node: originator from which the batman-adv packet was sent | |
416 | * | |
417 | * Sends a ethernet frame to the receive path of the local @soft_iface. | |
418 | * skb->data has still point to the batman-adv header with the size @hdr_size. | |
419 | * The caller has to have parsed this header already and made sure that at least | |
420 | * @hdr_size bytes are still available for pull in @skb. | |
421 | * | |
422 | * The packet may still get dropped. This can happen when the encapsulated | |
423 | * ethernet frame is invalid or contains again an batman-adv packet. Also | |
424 | * unicast packets will be dropped directly when it was sent between two | |
425 | * isolated clients. | |
426 | */ | |
04b482a2 | 427 | void batadv_interface_rx(struct net_device *soft_iface, |
6535db56 SE |
428 | struct sk_buff *skb, int hdr_size, |
429 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 430 | { |
a40d9b07 | 431 | struct batadv_bcast_packet *batadv_bcast_packet; |
c018ad3d | 432 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c018ad3d AQ |
433 | struct vlan_ethhdr *vhdr; |
434 | struct ethhdr *ethhdr; | |
435 | unsigned short vid; | |
2d3f6ccc SW |
436 | bool is_bcast; |
437 | ||
a40d9b07 SW |
438 | batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; |
439 | is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); | |
c6c8fea2 | 440 | |
c6c8fea2 SE |
441 | skb_pull_rcsum(skb, hdr_size); |
442 | skb_reset_mac_header(skb); | |
443 | ||
55883fd1 AQ |
444 | /* clean the netfilter state now that the batman-adv header has been |
445 | * removed | |
446 | */ | |
447 | nf_reset(skb); | |
448 | ||
c7829666 SE |
449 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) |
450 | goto dropped; | |
451 | ||
2b1e2cb3 | 452 | vid = batadv_get_vid(skb, 0); |
7ed4be95 | 453 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
454 | |
455 | switch (ntohs(ethhdr->h_proto)) { | |
456 | case ETH_P_8021Q: | |
c7829666 SE |
457 | if (!pskb_may_pull(skb, VLAN_ETH_HLEN)) |
458 | goto dropped; | |
459 | ||
c6c8fea2 | 460 | vhdr = (struct vlan_ethhdr *)skb->data; |
c6c8fea2 | 461 | |
9d1601ef ML |
462 | /* drop batman-in-batman packets to prevent loops */ |
463 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) | |
c6c8fea2 SE |
464 | break; |
465 | ||
466 | /* fall through */ | |
af5d4f77 | 467 | case ETH_P_BATMAN: |
c6c8fea2 SE |
468 | goto dropped; |
469 | } | |
470 | ||
c6c8fea2 | 471 | /* skb->dev & skb->pkt_type are set here */ |
c6c8fea2 | 472 | skb->protocol = eth_type_trans(skb, soft_iface); |
abd63605 | 473 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
c6c8fea2 | 474 | |
1c9b0550 ML |
475 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
476 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
477 | skb->len + ETH_HLEN); | |
c6c8fea2 | 478 | |
74490f96 AQ |
479 | /* Let the bridge loop avoidance check the packet. If will |
480 | * not handle it, we can safely push it up. | |
481 | */ | |
482 | if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) | |
483 | goto out; | |
484 | ||
37135173 AQ |
485 | if (orig_node) |
486 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
c018ad3d | 487 | ethhdr->h_source, vid); |
37135173 | 488 | |
42cb0bef AQ |
489 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
490 | /* set the mark on broadcast packets if AP isolation is ON and | |
491 | * the packet is coming from an "isolated" client | |
492 | */ | |
493 | if (batadv_vlan_ap_isola_get(bat_priv, vid) && | |
494 | batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, | |
495 | vid)) { | |
496 | /* save bits in skb->mark not covered by the mask and | |
497 | * apply the mark on the rest | |
498 | */ | |
499 | skb->mark &= ~bat_priv->isolation_mark_mask; | |
500 | skb->mark |= bat_priv->isolation_mark; | |
501 | } | |
502 | } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, | |
503 | ethhdr->h_dest, vid)) { | |
59b699cd | 504 | goto dropped; |
42cb0bef | 505 | } |
59b699cd | 506 | |
c6c8fea2 | 507 | netif_rx(skb); |
ba85fac2 | 508 | goto out; |
c6c8fea2 SE |
509 | |
510 | dropped: | |
511 | kfree_skb(skb); | |
512 | out: | |
513 | return; | |
514 | } | |
515 | ||
6be4d30c | 516 | /** |
7e9a8c2c SE |
517 | * batadv_softif_vlan_release() - release vlan from lists and queue for free |
518 | * after rcu grace period | |
6be4d30c SE |
519 | * @ref: kref pointer of the vlan object |
520 | */ | |
521 | static void batadv_softif_vlan_release(struct kref *ref) | |
522 | { | |
523 | struct batadv_softif_vlan *vlan; | |
524 | ||
525 | vlan = container_of(ref, struct batadv_softif_vlan, refcount); | |
526 | ||
527 | spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
528 | hlist_del_rcu(&vlan->list); | |
529 | spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
530 | ||
531 | kfree_rcu(vlan, rcu); | |
532 | } | |
533 | ||
5d2c05b2 | 534 | /** |
7e9a8c2c | 535 | * batadv_softif_vlan_put() - decrease the vlan object refcounter and |
6be4d30c | 536 | * possibly release it |
e51f0397 | 537 | * @vlan: the vlan object to release |
5d2c05b2 | 538 | */ |
9c3bf081 | 539 | void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan) |
5d2c05b2 | 540 | { |
354136bc ML |
541 | if (!vlan) |
542 | return; | |
543 | ||
6be4d30c | 544 | kref_put(&vlan->refcount, batadv_softif_vlan_release); |
5d2c05b2 AQ |
545 | } |
546 | ||
547 | /** | |
7e9a8c2c | 548 | * batadv_softif_vlan_get() - get the vlan object for a specific vid |
5d2c05b2 AQ |
549 | * @bat_priv: the bat priv with all the soft interface information |
550 | * @vid: the identifier of the vlan object to retrieve | |
551 | * | |
62fe710f | 552 | * Return: the private data of the vlan matching the vid passed as argument or |
5d2c05b2 AQ |
553 | * NULL otherwise. The refcounter of the returned object is incremented by 1. |
554 | */ | |
90f4435d AQ |
555 | struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, |
556 | unsigned short vid) | |
5d2c05b2 AQ |
557 | { |
558 | struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; | |
559 | ||
560 | rcu_read_lock(); | |
561 | hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { | |
562 | if (vlan_tmp->vid != vid) | |
563 | continue; | |
564 | ||
6be4d30c | 565 | if (!kref_get_unless_zero(&vlan_tmp->refcount)) |
5d2c05b2 AQ |
566 | continue; |
567 | ||
568 | vlan = vlan_tmp; | |
569 | break; | |
570 | } | |
571 | rcu_read_unlock(); | |
572 | ||
573 | return vlan; | |
574 | } | |
575 | ||
576 | /** | |
7e9a8c2c | 577 | * batadv_softif_create_vlan() - allocate the needed resources for a new vlan |
5d2c05b2 AQ |
578 | * @bat_priv: the bat priv with all the soft interface information |
579 | * @vid: the VLAN identifier | |
580 | * | |
62fe710f | 581 | * Return: 0 on success, a negative error otherwise. |
5d2c05b2 AQ |
582 | */ |
583 | int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) | |
584 | { | |
585 | struct batadv_softif_vlan *vlan; | |
90f4435d | 586 | int err; |
5d2c05b2 | 587 | |
94cb82f5 SE |
588 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
589 | ||
5d2c05b2 AQ |
590 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
591 | if (vlan) { | |
9c3bf081 | 592 | batadv_softif_vlan_put(vlan); |
94cb82f5 | 593 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); |
5d2c05b2 AQ |
594 | return -EEXIST; |
595 | } | |
596 | ||
597 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
94cb82f5 SE |
598 | if (!vlan) { |
599 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
5d2c05b2 | 600 | return -ENOMEM; |
94cb82f5 | 601 | } |
5d2c05b2 | 602 | |
35df3b29 | 603 | vlan->bat_priv = bat_priv; |
5d2c05b2 | 604 | vlan->vid = vid; |
6be4d30c | 605 | kref_init(&vlan->refcount); |
5d2c05b2 | 606 | |
b8cbd81d AQ |
607 | atomic_set(&vlan->ap_isolation, 0); |
608 | ||
94cb82f5 SE |
609 | kref_get(&vlan->refcount); |
610 | hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); | |
611 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
612 | ||
613 | /* batadv_sysfs_add_vlan cannot be in the spinlock section due to the | |
614 | * sleeping behavior of the sysfs functions and the fs_reclaim lock | |
615 | */ | |
90f4435d AQ |
616 | err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); |
617 | if (err) { | |
94cb82f5 SE |
618 | /* ref for the function */ |
619 | batadv_softif_vlan_put(vlan); | |
620 | ||
621 | /* ref for the list */ | |
622 | batadv_softif_vlan_put(vlan); | |
90f4435d AQ |
623 | return err; |
624 | } | |
625 | ||
5d2c05b2 AQ |
626 | /* add a new TT local entry. This one will be marked with the NOPURGE |
627 | * flag | |
628 | */ | |
629 | batadv_tt_local_add(bat_priv->soft_iface, | |
630 | bat_priv->soft_iface->dev_addr, vid, | |
9464d071 | 631 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
5d2c05b2 | 632 | |
df28ca6b SE |
633 | /* don't return reference to new softif_vlan */ |
634 | batadv_softif_vlan_put(vlan); | |
635 | ||
5d2c05b2 AQ |
636 | return 0; |
637 | } | |
638 | ||
639 | /** | |
7e9a8c2c | 640 | * batadv_softif_destroy_vlan() - remove and destroy a softif_vlan object |
5d2c05b2 AQ |
641 | * @bat_priv: the bat priv with all the soft interface information |
642 | * @vlan: the object to remove | |
643 | */ | |
644 | static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, | |
645 | struct batadv_softif_vlan *vlan) | |
646 | { | |
5d2c05b2 AQ |
647 | /* explicitly remove the associated TT local entry because it is marked |
648 | * with the NOPURGE flag | |
649 | */ | |
650 | batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, | |
651 | vlan->vid, "vlan interface destroyed", false); | |
652 | ||
35df3b29 | 653 | batadv_sysfs_del_vlan(bat_priv, vlan); |
9c3bf081 | 654 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
655 | } |
656 | ||
657 | /** | |
7e9a8c2c | 658 | * batadv_interface_add_vid() - ndo_add_vid API implementation |
5d2c05b2 | 659 | * @dev: the netdev of the mesh interface |
7afcbbef | 660 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
661 | * @vid: identifier of the new vlan |
662 | * | |
663 | * Set up all the internal structures for handling the new vlan on top of the | |
664 | * mesh interface | |
665 | * | |
62fe710f | 666 | * Return: 0 on success or a negative error code in case of failure. |
5d2c05b2 AQ |
667 | */ |
668 | static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, | |
669 | unsigned short vid) | |
670 | { | |
671 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
35df3b29 AQ |
672 | struct batadv_softif_vlan *vlan; |
673 | int ret; | |
5d2c05b2 AQ |
674 | |
675 | /* only 802.1Q vlans are supported. | |
676 | * batman-adv does not know how to handle other types | |
677 | */ | |
678 | if (proto != htons(ETH_P_8021Q)) | |
679 | return -EINVAL; | |
680 | ||
681 | vid |= BATADV_VLAN_HAS_TAG; | |
682 | ||
35df3b29 AQ |
683 | /* if a new vlan is getting created and it already exists, it means that |
684 | * it was not deleted yet. batadv_softif_vlan_get() increases the | |
685 | * refcount in order to revive the object. | |
686 | * | |
687 | * if it does not exist then create it. | |
688 | */ | |
689 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
690 | if (!vlan) | |
691 | return batadv_softif_create_vlan(bat_priv, vid); | |
692 | ||
693 | /* recreate the sysfs object if it was already destroyed (and it should | |
694 | * be since we received a kill_vid() for this vlan | |
695 | */ | |
696 | if (!vlan->kobj) { | |
697 | ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); | |
698 | if (ret) { | |
9c3bf081 | 699 | batadv_softif_vlan_put(vlan); |
35df3b29 AQ |
700 | return ret; |
701 | } | |
702 | } | |
703 | ||
704 | /* add a new TT local entry. This one will be marked with the NOPURGE | |
705 | * flag. This must be added again, even if the vlan object already | |
706 | * exists, because the entry was deleted by kill_vid() | |
707 | */ | |
708 | batadv_tt_local_add(bat_priv->soft_iface, | |
709 | bat_priv->soft_iface->dev_addr, vid, | |
710 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); | |
711 | ||
712 | return 0; | |
5d2c05b2 AQ |
713 | } |
714 | ||
715 | /** | |
7e9a8c2c | 716 | * batadv_interface_kill_vid() - ndo_kill_vid API implementation |
5d2c05b2 | 717 | * @dev: the netdev of the mesh interface |
7afcbbef | 718 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
719 | * @vid: identifier of the deleted vlan |
720 | * | |
721 | * Destroy all the internal structures used to handle the vlan identified by vid | |
722 | * on top of the mesh interface | |
723 | * | |
62fe710f | 724 | * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q |
5d2c05b2 AQ |
725 | * or -ENOENT if the specified vlan id wasn't registered. |
726 | */ | |
727 | static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, | |
728 | unsigned short vid) | |
729 | { | |
730 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
731 | struct batadv_softif_vlan *vlan; | |
732 | ||
733 | /* only 802.1Q vlans are supported. batman-adv does not know how to | |
734 | * handle other types | |
735 | */ | |
736 | if (proto != htons(ETH_P_8021Q)) | |
737 | return -EINVAL; | |
738 | ||
739 | vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); | |
740 | if (!vlan) | |
741 | return -ENOENT; | |
742 | ||
743 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
744 | ||
745 | /* finally free the vlan object */ | |
9c3bf081 | 746 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
747 | |
748 | return 0; | |
749 | } | |
750 | ||
36c1d153 SE |
751 | /* batman-adv network devices have devices nesting below it and are a special |
752 | * "super class" of normal network devices; split their locks off into a | |
753 | * separate class since they always nest. | |
754 | */ | |
755 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
756 | static struct lock_class_key batadv_netdev_addr_lock_key; | |
757 | ||
758 | /** | |
7e9a8c2c | 759 | * batadv_set_lockdep_class_one() - Set lockdep class for a single tx queue |
36c1d153 SE |
760 | * @dev: device which owns the tx queue |
761 | * @txq: tx queue to modify | |
762 | * @_unused: always NULL | |
763 | */ | |
764 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
765 | struct netdev_queue *txq, | |
766 | void *_unused) | |
767 | { | |
768 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
769 | } | |
770 | ||
771 | /** | |
7e9a8c2c | 772 | * batadv_set_lockdep_class() - Set txq and addr_list lockdep class |
36c1d153 SE |
773 | * @dev: network device to modify |
774 | */ | |
775 | static void batadv_set_lockdep_class(struct net_device *dev) | |
776 | { | |
777 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); | |
778 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); | |
779 | } | |
780 | ||
37130293 | 781 | /** |
7e9a8c2c | 782 | * batadv_softif_init_late() - late stage initialization of soft interface |
37130293 SE |
783 | * @dev: registered network device to modify |
784 | * | |
62fe710f | 785 | * Return: error code on failures |
37130293 SE |
786 | */ |
787 | static int batadv_softif_init_late(struct net_device *dev) | |
c6c8fea2 | 788 | { |
56303d34 | 789 | struct batadv_priv *bat_priv; |
6b5e971a | 790 | u32 random_seqno; |
c6c8fea2 | 791 | int ret; |
6b5e971a | 792 | size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM; |
c6c8fea2 | 793 | |
37130293 | 794 | batadv_set_lockdep_class(dev); |
c6c8fea2 | 795 | |
37130293 SE |
796 | bat_priv = netdev_priv(dev); |
797 | bat_priv->soft_iface = dev; | |
1c9b0550 ML |
798 | |
799 | /* batadv_interface_stats() needs to be available as soon as | |
800 | * register_netdevice() has been called | |
801 | */ | |
6b5e971a | 802 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64)); |
1c9b0550 | 803 | if (!bat_priv->bat_counters) |
37130293 | 804 | return -ENOMEM; |
c6c8fea2 | 805 | |
c6c8fea2 SE |
806 | atomic_set(&bat_priv->aggregated_ogms, 1); |
807 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 808 | #ifdef CONFIG_BATMAN_ADV_BLA |
dab7b621 | 809 | atomic_set(&bat_priv->bridge_loop_avoidance, 1); |
fa706554 | 810 | #endif |
33af49ad AQ |
811 | #ifdef CONFIG_BATMAN_ADV_DAT |
812 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
60432d75 LL |
813 | #endif |
814 | #ifdef CONFIG_BATMAN_ADV_MCAST | |
72f7b2de LL |
815 | bat_priv->mcast.querier_ipv4.exists = false; |
816 | bat_priv->mcast.querier_ipv4.shadowing = false; | |
817 | bat_priv->mcast.querier_ipv6.exists = false; | |
818 | bat_priv->mcast.querier_ipv6.shadowing = false; | |
60432d75 | 819 | bat_priv->mcast.flags = BATADV_NO_FLAGS; |
1d8ab8d3 | 820 | atomic_set(&bat_priv->multicast_mode, 1); |
ab49886e | 821 | atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); |
4c8755d6 LL |
822 | atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); |
823 | atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); | |
33af49ad | 824 | #endif |
3a24a63e | 825 | atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF); |
414254e3 ML |
826 | atomic_set(&bat_priv->gw.bandwidth_down, 100); |
827 | atomic_set(&bat_priv->gw.bandwidth_up, 20); | |
c6c8fea2 | 828 | atomic_set(&bat_priv->orig_interval, 1000); |
e03366ea | 829 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 830 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 831 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 832 | #endif |
c6c8fea2 | 833 | atomic_set(&bat_priv->fragmentation, 1); |
a19d3d85 | 834 | atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN); |
42d0b044 SE |
835 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
836 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 837 | |
39c75a51 | 838 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 839 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
840 | atomic_set(&bat_priv->tt.vn, 0); |
841 | atomic_set(&bat_priv->tt.local_changes, 0); | |
842 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
843 | #ifdef CONFIG_BATMAN_ADV_BLA | |
844 | atomic_set(&bat_priv->bla.num_requests, 0); | |
845 | #endif | |
33a3bb4a AQ |
846 | atomic_set(&bat_priv->tp_num, 0); |
847 | ||
807736f6 SE |
848 | bat_priv->tt.last_changeset = NULL; |
849 | bat_priv->tt.last_changeset_len = 0; | |
c42edfe3 AQ |
850 | bat_priv->isolation_mark = 0; |
851 | bat_priv->isolation_mark_mask = 0; | |
c6c8fea2 | 852 | |
ee75ed88 MH |
853 | /* randomize initial seqno to avoid collision */ |
854 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
855 | atomic_set(&bat_priv->frag_seqno, random_seqno); | |
856 | ||
c6c8fea2 | 857 | bat_priv->primary_if = NULL; |
c6c8fea2 | 858 | |
d353d8d4 MH |
859 | batadv_nc_init_bat_priv(bat_priv); |
860 | ||
37130293 | 861 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 862 | if (ret < 0) |
37130293 | 863 | goto free_bat_counters; |
c6c8fea2 | 864 | |
37130293 | 865 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 866 | if (ret < 0) |
37130293 | 867 | goto free_bat_counters; |
c6c8fea2 | 868 | |
37130293 | 869 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
870 | if (ret < 0) |
871 | goto unreg_debugfs; | |
872 | ||
37130293 | 873 | return 0; |
c6c8fea2 SE |
874 | |
875 | unreg_debugfs: | |
37130293 | 876 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
877 | free_bat_counters: |
878 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 879 | bat_priv->bat_counters = NULL; |
37130293 SE |
880 | |
881 | return ret; | |
882 | } | |
883 | ||
3dbd550b | 884 | /** |
7e9a8c2c | 885 | * batadv_softif_slave_add() - Add a slave interface to a batadv_soft_interface |
3dbd550b SE |
886 | * @dev: batadv_soft_interface used as master interface |
887 | * @slave_dev: net_device which should become the slave interface | |
bad5680b | 888 | * @extack: extended ACK report struct |
3dbd550b | 889 | * |
62fe710f | 890 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
891 | */ |
892 | static int batadv_softif_slave_add(struct net_device *dev, | |
33eaf2a6 DA |
893 | struct net_device *slave_dev, |
894 | struct netlink_ext_ack *extack) | |
3dbd550b SE |
895 | { |
896 | struct batadv_hard_iface *hard_iface; | |
2cd45a06 | 897 | struct net *net = dev_net(dev); |
3dbd550b SE |
898 | int ret = -EINVAL; |
899 | ||
900 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
00f548bf | 901 | if (!hard_iface || hard_iface->soft_iface) |
3dbd550b SE |
902 | goto out; |
903 | ||
2cd45a06 | 904 | ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); |
3dbd550b SE |
905 | |
906 | out: | |
907 | if (hard_iface) | |
82047ad7 | 908 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
909 | return ret; |
910 | } | |
911 | ||
912 | /** | |
7e9a8c2c | 913 | * batadv_softif_slave_del() - Delete a slave iface from a batadv_soft_interface |
3dbd550b SE |
914 | * @dev: batadv_soft_interface used as master interface |
915 | * @slave_dev: net_device which should be removed from the master interface | |
916 | * | |
62fe710f | 917 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
918 | */ |
919 | static int batadv_softif_slave_del(struct net_device *dev, | |
920 | struct net_device *slave_dev) | |
921 | { | |
922 | struct batadv_hard_iface *hard_iface; | |
923 | int ret = -EINVAL; | |
924 | ||
925 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
926 | ||
927 | if (!hard_iface || hard_iface->soft_iface != dev) | |
928 | goto out; | |
929 | ||
930 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
931 | ret = 0; | |
932 | ||
933 | out: | |
934 | if (hard_iface) | |
82047ad7 | 935 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
936 | return ret; |
937 | } | |
938 | ||
37130293 SE |
939 | static const struct net_device_ops batadv_netdev_ops = { |
940 | .ndo_init = batadv_softif_init_late, | |
941 | .ndo_open = batadv_interface_open, | |
942 | .ndo_stop = batadv_interface_release, | |
943 | .ndo_get_stats = batadv_interface_stats, | |
5d2c05b2 AQ |
944 | .ndo_vlan_rx_add_vid = batadv_interface_add_vid, |
945 | .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, | |
37130293 SE |
946 | .ndo_set_mac_address = batadv_interface_set_mac_addr, |
947 | .ndo_change_mtu = batadv_interface_change_mtu, | |
a4deee1a | 948 | .ndo_set_rx_mode = batadv_interface_set_rx_mode, |
37130293 | 949 | .ndo_start_xmit = batadv_interface_tx, |
3dbd550b SE |
950 | .ndo_validate_addr = eth_validate_addr, |
951 | .ndo_add_slave = batadv_softif_slave_add, | |
952 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
953 | }; |
954 | ||
5405e19e SE |
955 | static void batadv_get_drvinfo(struct net_device *dev, |
956 | struct ethtool_drvinfo *info) | |
957 | { | |
958 | strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); | |
959 | strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
960 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
961 | strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
962 | } | |
963 | ||
964 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
965 | * Declare each description string in struct.name[] to get fixed sized buffer | |
966 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
967 | */ | |
968 | static const struct { | |
969 | const char name[ETH_GSTRING_LEN]; | |
970 | } batadv_counters_strings[] = { | |
971 | { "tx" }, | |
972 | { "tx_bytes" }, | |
973 | { "tx_dropped" }, | |
974 | { "rx" }, | |
975 | { "rx_bytes" }, | |
976 | { "forward" }, | |
977 | { "forward_bytes" }, | |
978 | { "mgmt_tx" }, | |
979 | { "mgmt_tx_bytes" }, | |
980 | { "mgmt_rx" }, | |
981 | { "mgmt_rx_bytes" }, | |
982 | { "frag_tx" }, | |
983 | { "frag_tx_bytes" }, | |
984 | { "frag_rx" }, | |
985 | { "frag_rx_bytes" }, | |
986 | { "frag_fwd" }, | |
987 | { "frag_fwd_bytes" }, | |
988 | { "tt_request_tx" }, | |
989 | { "tt_request_rx" }, | |
990 | { "tt_response_tx" }, | |
991 | { "tt_response_rx" }, | |
992 | { "tt_roam_adv_tx" }, | |
993 | { "tt_roam_adv_rx" }, | |
994 | #ifdef CONFIG_BATMAN_ADV_DAT | |
995 | { "dat_get_tx" }, | |
996 | { "dat_get_rx" }, | |
997 | { "dat_put_tx" }, | |
998 | { "dat_put_rx" }, | |
999 | { "dat_cached_reply_tx" }, | |
1000 | #endif | |
1001 | #ifdef CONFIG_BATMAN_ADV_NC | |
1002 | { "nc_code" }, | |
1003 | { "nc_code_bytes" }, | |
1004 | { "nc_recode" }, | |
1005 | { "nc_recode_bytes" }, | |
1006 | { "nc_buffer" }, | |
1007 | { "nc_decode" }, | |
1008 | { "nc_decode_bytes" }, | |
1009 | { "nc_decode_failed" }, | |
1010 | { "nc_sniffed" }, | |
1011 | #endif | |
1012 | }; | |
1013 | ||
1014 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
1015 | { | |
1016 | if (stringset == ETH_SS_STATS) | |
1017 | memcpy(data, batadv_counters_strings, | |
1018 | sizeof(batadv_counters_strings)); | |
1019 | } | |
1020 | ||
1021 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
1022 | struct ethtool_stats *stats, u64 *data) | |
1023 | { | |
1024 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
1025 | int i; | |
1026 | ||
1027 | for (i = 0; i < BATADV_CNT_NUM; i++) | |
1028 | data[i] = batadv_sum_counter(bat_priv, i); | |
1029 | } | |
1030 | ||
1031 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
1032 | { | |
1033 | if (stringset == ETH_SS_STATS) | |
1034 | return BATADV_CNT_NUM; | |
1035 | ||
1036 | return -EOPNOTSUPP; | |
1037 | } | |
1038 | ||
1039 | static const struct ethtool_ops batadv_ethtool_ops = { | |
1040 | .get_drvinfo = batadv_get_drvinfo, | |
1041 | .get_link = ethtool_op_get_link, | |
1042 | .get_strings = batadv_get_strings, | |
1043 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
1044 | .get_sset_count = batadv_get_sset_count, | |
1045 | }; | |
1046 | ||
b3246020 | 1047 | /** |
7e9a8c2c | 1048 | * batadv_softif_free() - Deconstructor of batadv_soft_interface |
b3246020 SE |
1049 | * @dev: Device to cleanup and remove |
1050 | */ | |
1051 | static void batadv_softif_free(struct net_device *dev) | |
1052 | { | |
1053 | batadv_debugfs_del_meshif(dev); | |
1054 | batadv_mesh_free(dev); | |
0c501345 AQ |
1055 | |
1056 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
1057 | * their tasks. Wait for them all to be finished before freeing the | |
1058 | * netdev and its private data (bat_priv) | |
1059 | */ | |
1060 | rcu_barrier(); | |
b3246020 SE |
1061 | } |
1062 | ||
37130293 | 1063 | /** |
7e9a8c2c | 1064 | * batadv_softif_init_early() - early stage initialization of soft interface |
37130293 SE |
1065 | * @dev: registered network device to modify |
1066 | */ | |
1067 | static void batadv_softif_init_early(struct net_device *dev) | |
1068 | { | |
37130293 SE |
1069 | ether_setup(dev); |
1070 | ||
1071 | dev->netdev_ops = &batadv_netdev_ops; | |
cf124db5 DM |
1072 | dev->needs_free_netdev = true; |
1073 | dev->priv_destructor = batadv_softif_free; | |
0d21cdaa | 1074 | dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL; |
a7ea49af | 1075 | dev->features |= NETIF_F_LLTX; |
cdf73703 | 1076 | dev->priv_flags |= IFF_NO_QUEUE; |
37130293 SE |
1077 | |
1078 | /* can't call min_mtu, because the needed variables | |
1079 | * have not been initialized yet | |
1080 | */ | |
1081 | dev->mtu = ETH_DATA_LEN; | |
37130293 SE |
1082 | |
1083 | /* generate random address */ | |
1084 | eth_hw_addr_random(dev); | |
1085 | ||
7ad24ea4 | 1086 | dev->ethtool_ops = &batadv_ethtool_ops; |
37130293 SE |
1087 | } |
1088 | ||
ff15c27c SE |
1089 | /** |
1090 | * batadv_softif_create() - Create and register soft interface | |
1091 | * @net: the applicable net namespace | |
1092 | * @name: name of the new soft interface | |
1093 | * | |
1094 | * Return: newly allocated soft_interface, NULL on errors | |
1095 | */ | |
2cd45a06 | 1096 | struct net_device *batadv_softif_create(struct net *net, const char *name) |
37130293 SE |
1097 | { |
1098 | struct net_device *soft_iface; | |
1099 | int ret; | |
1100 | ||
1101 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
c835a677 | 1102 | NET_NAME_UNKNOWN, batadv_softif_init_early); |
37130293 SE |
1103 | if (!soft_iface) |
1104 | return NULL; | |
1105 | ||
2cd45a06 AL |
1106 | dev_net_set(soft_iface, net); |
1107 | ||
a4ac28c0 SE |
1108 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
1109 | ||
37130293 SE |
1110 | ret = register_netdevice(soft_iface); |
1111 | if (ret < 0) { | |
1112 | pr_err("Unable to register the batman interface '%s': %i\n", | |
1113 | name, ret); | |
1114 | free_netdev(soft_iface); | |
1115 | return NULL; | |
1116 | } | |
1117 | ||
1118 | return soft_iface; | |
c6c8fea2 SE |
1119 | } |
1120 | ||
e07932ae | 1121 | /** |
7e9a8c2c | 1122 | * batadv_softif_destroy_sysfs() - deletion of batadv_soft_interface via sysfs |
e07932ae ML |
1123 | * @soft_iface: the to-be-removed batman-adv interface |
1124 | */ | |
1125 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 1126 | { |
5bc44dc8 | 1127 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
569c9850 SE |
1128 | struct batadv_softif_vlan *vlan; |
1129 | ||
1130 | ASSERT_RTNL(); | |
1131 | ||
1132 | /* destroy the "untagged" VLAN */ | |
1133 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1134 | if (vlan) { | |
1135 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1136 | batadv_softif_vlan_put(vlan); | |
1137 | } | |
5bc44dc8 | 1138 | |
569c9850 SE |
1139 | batadv_sysfs_del_meshif(soft_iface); |
1140 | unregister_netdevice(soft_iface); | |
c6c8fea2 SE |
1141 | } |
1142 | ||
a4ac28c0 | 1143 | /** |
7e9a8c2c SE |
1144 | * batadv_softif_destroy_netlink() - deletion of batadv_soft_interface via |
1145 | * netlink | |
a4ac28c0 SE |
1146 | * @soft_iface: the to-be-removed batman-adv interface |
1147 | * @head: list pointer | |
1148 | */ | |
1149 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
1150 | struct list_head *head) | |
1151 | { | |
420cb1b7 | 1152 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
a4ac28c0 | 1153 | struct batadv_hard_iface *hard_iface; |
420cb1b7 | 1154 | struct batadv_softif_vlan *vlan; |
a4ac28c0 SE |
1155 | |
1156 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
1157 | if (hard_iface->soft_iface == soft_iface) | |
1158 | batadv_hardif_disable_interface(hard_iface, | |
1159 | BATADV_IF_CLEANUP_KEEP); | |
1160 | } | |
1161 | ||
420cb1b7 SE |
1162 | /* destroy the "untagged" VLAN */ |
1163 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1164 | if (vlan) { | |
1165 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1166 | batadv_softif_vlan_put(vlan); | |
1167 | } | |
1168 | ||
a4ac28c0 SE |
1169 | batadv_sysfs_del_meshif(soft_iface); |
1170 | unregister_netdevice_queue(soft_iface, head); | |
1171 | } | |
1172 | ||
ff15c27c SE |
1173 | /** |
1174 | * batadv_softif_is_valid() - Check whether device is a batadv soft interface | |
1175 | * @net_dev: device which should be checked | |
1176 | * | |
1177 | * Return: true when net_dev is a batman-adv interface, false otherwise | |
1178 | */ | |
4b426b10 | 1179 | bool batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 1180 | { |
0294ca0d | 1181 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
4b426b10 | 1182 | return true; |
e44d8fe2 | 1183 | |
4b426b10 | 1184 | return false; |
e44d8fe2 SE |
1185 | } |
1186 | ||
a4ac28c0 SE |
1187 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
1188 | .kind = "batadv", | |
1189 | .priv_size = sizeof(struct batadv_priv), | |
1190 | .setup = batadv_softif_init_early, | |
1191 | .dellink = batadv_softif_destroy_netlink, | |
1192 | }; |