Commit | Line | Data |
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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
68e039f9 | 2 | /* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
c6c8fea2 SE |
5 | */ |
6 | ||
c6c8fea2 | 7 | #include "soft-interface.h" |
1e2c2a4f SE |
8 | #include "main.h" |
9 | ||
10 | #include <linux/atomic.h> | |
11 | #include <linux/byteorder/generic.h> | |
12 | #include <linux/cache.h> | |
13 | #include <linux/compiler.h> | |
c408c1b9 | 14 | #include <linux/cpumask.h> |
1e2c2a4f | 15 | #include <linux/errno.h> |
c6c8fea2 | 16 | #include <linux/etherdevice.h> |
1e2c2a4f | 17 | #include <linux/ethtool.h> |
b92b94ac | 18 | #include <linux/gfp.h> |
1e2c2a4f | 19 | #include <linux/if_ether.h> |
c6c8fea2 | 20 | #include <linux/if_vlan.h> |
1e2c2a4f SE |
21 | #include <linux/jiffies.h> |
22 | #include <linux/kernel.h> | |
6be4d30c | 23 | #include <linux/kref.h> |
1e2c2a4f | 24 | #include <linux/list.h> |
2092c910 | 25 | #include <linux/lockdep.h> |
1e2c2a4f | 26 | #include <linux/netdevice.h> |
68a600de | 27 | #include <linux/netlink.h> |
1e2c2a4f SE |
28 | #include <linux/percpu.h> |
29 | #include <linux/printk.h> | |
30 | #include <linux/random.h> | |
31 | #include <linux/rculist.h> | |
32 | #include <linux/rcupdate.h> | |
569c9850 | 33 | #include <linux/rtnetlink.h> |
1e2c2a4f SE |
34 | #include <linux/skbuff.h> |
35 | #include <linux/slab.h> | |
36 | #include <linux/socket.h> | |
37 | #include <linux/spinlock.h> | |
38 | #include <linux/stddef.h> | |
39 | #include <linux/string.h> | |
40 | #include <linux/types.h> | |
fec149f5 | 41 | #include <uapi/linux/batadv_packet.h> |
e2d0d35b | 42 | #include <uapi/linux/batman_adv.h> |
1e2c2a4f | 43 | |
01d350d1 | 44 | #include "bat_algo.h" |
23721387 | 45 | #include "bridge_loop_avoidance.h" |
1e2c2a4f SE |
46 | #include "debugfs.h" |
47 | #include "distributed-arp-table.h" | |
48 | #include "gateway_client.h" | |
1e2c2a4f SE |
49 | #include "hard-interface.h" |
50 | #include "multicast.h" | |
d353d8d4 | 51 | #include "network-coding.h" |
f19dc777 | 52 | #include "originator.h" |
1e2c2a4f SE |
53 | #include "send.h" |
54 | #include "sysfs.h" | |
55 | #include "translation-table.h" | |
c6c8fea2 | 56 | |
ff15c27c SE |
57 | /** |
58 | * batadv_skb_head_push() - Increase header size and move (push) head pointer | |
59 | * @skb: packet buffer which should be modified | |
60 | * @len: number of bytes to add | |
61 | * | |
62 | * Return: 0 on success or negative error number in case of failure | |
63 | */ | |
04b482a2 | 64 | int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) |
c6c8fea2 SE |
65 | { |
66 | int result; | |
67 | ||
9cfc7bd6 | 68 | /* TODO: We must check if we can release all references to non-payload |
48915aed SE |
69 | * data using __skb_header_release in our skbs to allow skb_cow_header |
70 | * to work optimally. This means that those skbs are not allowed to read | |
c6c8fea2 SE |
71 | * or write any data which is before the current position of skb->data |
72 | * after that call and thus allow other skbs with the same data buffer | |
73 | * to write freely in that area. | |
74 | */ | |
75 | result = skb_cow_head(skb, len); | |
76 | if (result < 0) | |
77 | return result; | |
78 | ||
79 | skb_push(skb, len); | |
80 | return 0; | |
81 | } | |
82 | ||
0294ca0d | 83 | static int batadv_interface_open(struct net_device *dev) |
c6c8fea2 SE |
84 | { |
85 | netif_start_queue(dev); | |
86 | return 0; | |
87 | } | |
88 | ||
0294ca0d | 89 | static int batadv_interface_release(struct net_device *dev) |
c6c8fea2 SE |
90 | { |
91 | netif_stop_queue(dev); | |
92 | return 0; | |
93 | } | |
94 | ||
c408c1b9 | 95 | /** |
7e9a8c2c | 96 | * batadv_sum_counter() - Sum the cpu-local counters for index 'idx' |
c408c1b9 SE |
97 | * @bat_priv: the bat priv with all the soft interface information |
98 | * @idx: index of counter to sum up | |
99 | * | |
100 | * Return: sum of all cpu-local counters | |
101 | */ | |
102 | static u64 batadv_sum_counter(struct batadv_priv *bat_priv, size_t idx) | |
103 | { | |
104 | u64 *counters, sum = 0; | |
105 | int cpu; | |
106 | ||
107 | for_each_possible_cpu(cpu) { | |
108 | counters = per_cpu_ptr(bat_priv->bat_counters, cpu); | |
109 | sum += counters[idx]; | |
110 | } | |
111 | ||
112 | return sum; | |
113 | } | |
114 | ||
0294ca0d | 115 | static struct net_device_stats *batadv_interface_stats(struct net_device *dev) |
c6c8fea2 | 116 | { |
56303d34 | 117 | struct batadv_priv *bat_priv = netdev_priv(dev); |
ab044f8e | 118 | struct net_device_stats *stats = &dev->stats; |
1c9b0550 ML |
119 | |
120 | stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); | |
121 | stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); | |
122 | stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); | |
123 | stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); | |
124 | stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); | |
125 | return stats; | |
c6c8fea2 SE |
126 | } |
127 | ||
0294ca0d | 128 | static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) |
c6c8fea2 | 129 | { |
56303d34 | 130 | struct batadv_priv *bat_priv = netdev_priv(dev); |
94d1dd87 | 131 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 132 | struct sockaddr *addr = p; |
6b5e971a | 133 | u8 old_addr[ETH_ALEN]; |
c6c8fea2 SE |
134 | |
135 | if (!is_valid_ether_addr(addr->sa_data)) | |
136 | return -EADDRNOTAVAIL; | |
137 | ||
8fdd0153 AQ |
138 | ether_addr_copy(old_addr, dev->dev_addr); |
139 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
40a3eb33 | 140 | |
015758d0 | 141 | /* only modify transtable if it has been initialized before */ |
94d1dd87 AQ |
142 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
143 | return 0; | |
144 | ||
145 | rcu_read_lock(); | |
146 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
147 | batadv_tt_local_remove(bat_priv, old_addr, vlan->vid, | |
08c36d3e | 148 | "mac address changed", false); |
94d1dd87 | 149 | batadv_tt_local_add(dev, addr->sa_data, vlan->vid, |
9464d071 | 150 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
c6c8fea2 | 151 | } |
94d1dd87 | 152 | rcu_read_unlock(); |
c6c8fea2 | 153 | |
c6c8fea2 SE |
154 | return 0; |
155 | } | |
156 | ||
0294ca0d | 157 | static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) |
c6c8fea2 SE |
158 | { |
159 | /* check ranges */ | |
825ffe1f | 160 | if (new_mtu < 68 || new_mtu > batadv_hardif_min_mtu(dev)) |
c6c8fea2 SE |
161 | return -EINVAL; |
162 | ||
163 | dev->mtu = new_mtu; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
a4deee1a | 168 | /** |
7e9a8c2c | 169 | * batadv_interface_set_rx_mode() - set the rx mode of a device |
a4deee1a LL |
170 | * @dev: registered network device to modify |
171 | * | |
172 | * We do not actually need to set any rx filters for the virtual batman | |
173 | * soft interface. However a dummy handler enables a user to set static | |
174 | * multicast listeners for instance. | |
175 | */ | |
176 | static void batadv_interface_set_rx_mode(struct net_device *dev) | |
177 | { | |
178 | } | |
179 | ||
6bf9e4d3 LVO |
180 | static netdev_tx_t batadv_interface_tx(struct sk_buff *skb, |
181 | struct net_device *soft_iface) | |
c6c8fea2 | 182 | { |
c018ad3d | 183 | struct ethhdr *ethhdr; |
56303d34 SE |
184 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
185 | struct batadv_hard_iface *primary_if = NULL; | |
96412690 | 186 | struct batadv_bcast_packet *bcast_packet; |
6b5e971a SE |
187 | static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, |
188 | 0x00, 0x00}; | |
189 | static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, | |
190 | 0x00, 0x00}; | |
6c413b1c | 191 | enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; |
6b5e971a | 192 | u8 *dst_hint = NULL, chaddr[ETH_ALEN]; |
c018ad3d | 193 | struct vlan_ethhdr *vhdr; |
be7af5cf | 194 | unsigned int header_len = 0; |
c6c8fea2 | 195 | int data_len = skb->len, ret; |
c018ad3d | 196 | unsigned long brd_delay = 1; |
a19d3d85 | 197 | bool do_bcast = false, client_added; |
c018ad3d | 198 | unsigned short vid; |
6b5e971a | 199 | u32 seqno; |
6c413b1c | 200 | int gw_mode; |
32e72744 | 201 | enum batadv_forw_mode forw_mode = BATADV_FORW_SINGLE; |
1d8ab8d3 | 202 | struct batadv_orig_node *mcast_single_orig = NULL; |
53cf037b | 203 | int network_offset = ETH_HLEN; |
b61ec31c | 204 | __be16 proto; |
c6c8fea2 | 205 | |
39c75a51 | 206 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
c6c8fea2 SE |
207 | goto dropped; |
208 | ||
e2d9ba43 LL |
209 | /* reset control block to avoid left overs from previous users */ |
210 | memset(skb->cb, 0, sizeof(struct batadv_skb_cb)); | |
211 | ||
860e9538 | 212 | netif_trans_update(soft_iface); |
c018ad3d | 213 | vid = batadv_get_vid(skb, 0); |
9114daa8 SE |
214 | |
215 | skb_reset_mac_header(skb); | |
927c2ed7 | 216 | ethhdr = eth_hdr(skb); |
c6c8fea2 | 217 | |
b61ec31c LL |
218 | proto = ethhdr->h_proto; |
219 | ||
220 | switch (ntohs(proto)) { | |
c6c8fea2 | 221 | case ETH_P_8021Q: |
4ffcbfac ED |
222 | if (!pskb_may_pull(skb, sizeof(*vhdr))) |
223 | goto dropped; | |
927c2ed7 | 224 | vhdr = vlan_eth_hdr(skb); |
b61ec31c | 225 | proto = vhdr->h_vlan_encapsulated_proto; |
c6c8fea2 | 226 | |
9d1601ef | 227 | /* drop batman-in-batman packets to prevent loops */ |
b61ec31c | 228 | if (proto != htons(ETH_P_BATMAN)) { |
53cf037b | 229 | network_offset += VLAN_HLEN; |
c6c8fea2 | 230 | break; |
53cf037b | 231 | } |
c6c8fea2 | 232 | |
a7757d31 | 233 | fallthrough; |
af5d4f77 | 234 | case ETH_P_BATMAN: |
c6c8fea2 | 235 | goto dropped; |
a7f6ee94 | 236 | } |
c6c8fea2 | 237 | |
53cf037b LL |
238 | skb_set_network_header(skb, network_offset); |
239 | ||
08adf151 | 240 | if (batadv_bla_tx(bat_priv, skb, vid)) |
23721387 SW |
241 | goto dropped; |
242 | ||
9d2c9488 | 243 | /* skb->data might have been reallocated by batadv_bla_tx() */ |
927c2ed7 | 244 | ethhdr = eth_hdr(skb); |
9d2c9488 | 245 | |
a73105b8 | 246 | /* Register the client MAC in the transtable */ |
d3e9768a SW |
247 | if (!is_multicast_ether_addr(ethhdr->h_source) && |
248 | !batadv_bla_is_loopdetect_mac(ethhdr->h_source)) { | |
a19d3d85 | 249 | client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, |
9464d071 AQ |
250 | vid, skb->skb_iif, |
251 | skb->mark); | |
a19d3d85 ML |
252 | if (!client_added) |
253 | goto dropped; | |
254 | } | |
c6c8fea2 | 255 | |
b61ec31c LL |
256 | /* Snoop address candidates from DHCPACKs for early DAT filling */ |
257 | batadv_dat_snoop_outgoing_dhcp_ack(bat_priv, skb, proto, vid); | |
258 | ||
b1a8c04b SW |
259 | /* don't accept stp packets. STP does not help in meshes. |
260 | * better use the bridge loop avoidance ... | |
4934ab95 SW |
261 | * |
262 | * The same goes for ECTP sent at least by some Cisco Switches, | |
263 | * it might confuse the mesh when used with bridge loop avoidance. | |
b1a8c04b | 264 | */ |
1eda58bf | 265 | if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) |
b1a8c04b SW |
266 | goto dropped; |
267 | ||
4934ab95 SW |
268 | if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) |
269 | goto dropped; | |
270 | ||
3a24a63e | 271 | gw_mode = atomic_read(&bat_priv->gw.mode); |
be7af5cf | 272 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
6c413b1c AQ |
273 | /* if gw mode is off, broadcast every packet */ |
274 | if (gw_mode == BATADV_GW_MODE_OFF) { | |
275 | do_bcast = true; | |
276 | goto send; | |
be7af5cf | 277 | } |
9d2c9488 | 278 | |
6c413b1c AQ |
279 | dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, |
280 | chaddr); | |
281 | /* skb->data may have been modified by | |
282 | * batadv_gw_dhcp_recipient_get() | |
9d2c9488 | 283 | */ |
927c2ed7 | 284 | ethhdr = eth_hdr(skb); |
6c413b1c AQ |
285 | /* if gw_mode is on, broadcast any non-DHCP message. |
286 | * All the DHCP packets are going to be sent as unicast | |
287 | */ | |
288 | if (dhcp_rcp == BATADV_DHCP_NO) { | |
289 | do_bcast = true; | |
290 | goto send; | |
291 | } | |
292 | ||
293 | if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) | |
294 | dst_hint = chaddr; | |
295 | else if ((gw_mode == BATADV_GW_MODE_SERVER) && | |
296 | (dhcp_rcp == BATADV_DHCP_TO_SERVER)) | |
297 | /* gateways should not forward any DHCP message if | |
298 | * directed to a DHCP server | |
299 | */ | |
300 | goto dropped; | |
c6c8fea2 | 301 | |
6c413b1c | 302 | send: |
1d8ab8d3 LL |
303 | if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { |
304 | forw_mode = batadv_mcast_forw_mode(bat_priv, skb, | |
305 | &mcast_single_orig); | |
306 | if (forw_mode == BATADV_FORW_NONE) | |
307 | goto dropped; | |
308 | ||
32e72744 LL |
309 | if (forw_mode == BATADV_FORW_SINGLE || |
310 | forw_mode == BATADV_FORW_SOME) | |
1d8ab8d3 LL |
311 | do_bcast = false; |
312 | } | |
313 | } | |
314 | ||
c54f38c9 SW |
315 | batadv_skb_set_priority(skb, 0); |
316 | ||
c6c8fea2 SE |
317 | /* ethernet packet should be broadcasted */ |
318 | if (do_bcast) { | |
e5d89254 | 319 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 320 | if (!primary_if) |
c6c8fea2 SE |
321 | goto dropped; |
322 | ||
c384ea3e AQ |
323 | /* in case of ARP request, we do not immediately broadcasti the |
324 | * packet, instead we first wait for DAT to try to retrieve the | |
325 | * correct ARP entry | |
326 | */ | |
327 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) | |
328 | brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); | |
329 | ||
04b482a2 | 330 | if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) |
c6c8fea2 SE |
331 | goto dropped; |
332 | ||
96412690 | 333 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
a40d9b07 SW |
334 | bcast_packet->version = BATADV_COMPAT_VERSION; |
335 | bcast_packet->ttl = BATADV_TTL; | |
c6c8fea2 SE |
336 | |
337 | /* batman packet type: broadcast */ | |
a40d9b07 | 338 | bcast_packet->packet_type = BATADV_BCAST; |
162d549c | 339 | bcast_packet->reserved = 0; |
c6c8fea2 SE |
340 | |
341 | /* hw address of first interface is the orig mac because only | |
9cfc7bd6 SE |
342 | * this mac is known throughout the mesh |
343 | */ | |
8fdd0153 AQ |
344 | ether_addr_copy(bcast_packet->orig, |
345 | primary_if->net_dev->dev_addr); | |
c6c8fea2 SE |
346 | |
347 | /* set broadcast sequence number */ | |
bbb1f90e SE |
348 | seqno = atomic_inc_return(&bat_priv->bcast_seqno); |
349 | bcast_packet->seqno = htonl(seqno); | |
c6c8fea2 | 350 | |
3111beed | 351 | batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay, true); |
c6c8fea2 SE |
352 | |
353 | /* a copy is stored in the bcast list, therefore removing | |
9cfc7bd6 SE |
354 | * the original skb. |
355 | */ | |
bd687fe4 | 356 | consume_skb(skb); |
c6c8fea2 SE |
357 | |
358 | /* unicast packet */ | |
359 | } else { | |
6c413b1c AQ |
360 | /* DHCP packets going to a server will use the GW feature */ |
361 | if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { | |
9d2c9488 | 362 | ret = batadv_gw_out_of_range(bat_priv, skb); |
be7af5cf ML |
363 | if (ret) |
364 | goto dropped; | |
e300d314 | 365 | ret = batadv_send_skb_via_gw(bat_priv, skb, vid); |
1d8ab8d3 | 366 | } else if (mcast_single_orig) { |
3236d215 LL |
367 | ret = batadv_mcast_forw_send_orig(bat_priv, skb, vid, |
368 | mcast_single_orig); | |
32e72744 LL |
369 | } else if (forw_mode == BATADV_FORW_SOME) { |
370 | ret = batadv_mcast_forw_send(bat_priv, skb, vid); | |
6c413b1c AQ |
371 | } else { |
372 | if (batadv_dat_snoop_outgoing_arp_request(bat_priv, | |
373 | skb)) | |
374 | goto dropped; | |
e300d314 | 375 | |
6c413b1c AQ |
376 | batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); |
377 | ||
378 | ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, | |
379 | vid); | |
380 | } | |
eaac2c87 | 381 | if (ret != NET_XMIT_SUCCESS) |
c6c8fea2 SE |
382 | goto dropped_freed; |
383 | } | |
384 | ||
1c9b0550 ML |
385 | batadv_inc_counter(bat_priv, BATADV_CNT_TX); |
386 | batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); | |
c6c8fea2 SE |
387 | goto end; |
388 | ||
389 | dropped: | |
390 | kfree_skb(skb); | |
391 | dropped_freed: | |
1c9b0550 | 392 | batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); |
c6c8fea2 | 393 | end: |
f19dc777 SE |
394 | if (mcast_single_orig) |
395 | batadv_orig_node_put(mcast_single_orig); | |
32ae9b22 | 396 | if (primary_if) |
82047ad7 | 397 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
398 | return NETDEV_TX_OK; |
399 | } | |
400 | ||
f298cb94 | 401 | /** |
7e9a8c2c | 402 | * batadv_interface_rx() - receive ethernet frame on local batman-adv interface |
f298cb94 SE |
403 | * @soft_iface: local interface which will receive the ethernet frame |
404 | * @skb: ethernet frame for @soft_iface | |
f298cb94 SE |
405 | * @hdr_size: size of already parsed batman-adv header |
406 | * @orig_node: originator from which the batman-adv packet was sent | |
407 | * | |
bccb48c8 | 408 | * Sends an ethernet frame to the receive path of the local @soft_iface. |
f298cb94 SE |
409 | * skb->data has still point to the batman-adv header with the size @hdr_size. |
410 | * The caller has to have parsed this header already and made sure that at least | |
411 | * @hdr_size bytes are still available for pull in @skb. | |
412 | * | |
413 | * The packet may still get dropped. This can happen when the encapsulated | |
414 | * ethernet frame is invalid or contains again an batman-adv packet. Also | |
415 | * unicast packets will be dropped directly when it was sent between two | |
416 | * isolated clients. | |
417 | */ | |
04b482a2 | 418 | void batadv_interface_rx(struct net_device *soft_iface, |
6535db56 SE |
419 | struct sk_buff *skb, int hdr_size, |
420 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 421 | { |
a40d9b07 | 422 | struct batadv_bcast_packet *batadv_bcast_packet; |
c018ad3d | 423 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c018ad3d AQ |
424 | struct vlan_ethhdr *vhdr; |
425 | struct ethhdr *ethhdr; | |
426 | unsigned short vid; | |
74c09b72 | 427 | int packet_type; |
2d3f6ccc | 428 | |
a40d9b07 | 429 | batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; |
74c09b72 | 430 | packet_type = batadv_bcast_packet->packet_type; |
c6c8fea2 | 431 | |
c6c8fea2 SE |
432 | skb_pull_rcsum(skb, hdr_size); |
433 | skb_reset_mac_header(skb); | |
434 | ||
55883fd1 AQ |
435 | /* clean the netfilter state now that the batman-adv header has been |
436 | * removed | |
437 | */ | |
895b5c9f | 438 | nf_reset_ct(skb); |
55883fd1 | 439 | |
c7829666 SE |
440 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) |
441 | goto dropped; | |
442 | ||
2b1e2cb3 | 443 | vid = batadv_get_vid(skb, 0); |
7ed4be95 | 444 | ethhdr = eth_hdr(skb); |
c6c8fea2 SE |
445 | |
446 | switch (ntohs(ethhdr->h_proto)) { | |
447 | case ETH_P_8021Q: | |
c7829666 SE |
448 | if (!pskb_may_pull(skb, VLAN_ETH_HLEN)) |
449 | goto dropped; | |
450 | ||
c6c8fea2 | 451 | vhdr = (struct vlan_ethhdr *)skb->data; |
c6c8fea2 | 452 | |
9d1601ef ML |
453 | /* drop batman-in-batman packets to prevent loops */ |
454 | if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) | |
c6c8fea2 SE |
455 | break; |
456 | ||
a7757d31 | 457 | fallthrough; |
af5d4f77 | 458 | case ETH_P_BATMAN: |
c6c8fea2 SE |
459 | goto dropped; |
460 | } | |
461 | ||
c6c8fea2 | 462 | /* skb->dev & skb->pkt_type are set here */ |
c6c8fea2 | 463 | skb->protocol = eth_type_trans(skb, soft_iface); |
abd63605 | 464 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
c6c8fea2 | 465 | |
1c9b0550 ML |
466 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
467 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
468 | skb->len + ETH_HLEN); | |
c6c8fea2 | 469 | |
74490f96 AQ |
470 | /* Let the bridge loop avoidance check the packet. If will |
471 | * not handle it, we can safely push it up. | |
472 | */ | |
74c09b72 | 473 | if (batadv_bla_rx(bat_priv, skb, vid, packet_type)) |
74490f96 AQ |
474 | goto out; |
475 | ||
37135173 AQ |
476 | if (orig_node) |
477 | batadv_tt_add_temporary_global_entry(bat_priv, orig_node, | |
c018ad3d | 478 | ethhdr->h_source, vid); |
37135173 | 479 | |
42cb0bef AQ |
480 | if (is_multicast_ether_addr(ethhdr->h_dest)) { |
481 | /* set the mark on broadcast packets if AP isolation is ON and | |
482 | * the packet is coming from an "isolated" client | |
483 | */ | |
484 | if (batadv_vlan_ap_isola_get(bat_priv, vid) && | |
485 | batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, | |
486 | vid)) { | |
487 | /* save bits in skb->mark not covered by the mask and | |
488 | * apply the mark on the rest | |
489 | */ | |
490 | skb->mark &= ~bat_priv->isolation_mark_mask; | |
491 | skb->mark |= bat_priv->isolation_mark; | |
492 | } | |
493 | } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, | |
494 | ethhdr->h_dest, vid)) { | |
59b699cd | 495 | goto dropped; |
42cb0bef | 496 | } |
59b699cd | 497 | |
c6c8fea2 | 498 | netif_rx(skb); |
ba85fac2 | 499 | goto out; |
c6c8fea2 SE |
500 | |
501 | dropped: | |
502 | kfree_skb(skb); | |
503 | out: | |
504 | return; | |
505 | } | |
506 | ||
6be4d30c | 507 | /** |
7e9a8c2c SE |
508 | * batadv_softif_vlan_release() - release vlan from lists and queue for free |
509 | * after rcu grace period | |
6be4d30c SE |
510 | * @ref: kref pointer of the vlan object |
511 | */ | |
512 | static void batadv_softif_vlan_release(struct kref *ref) | |
513 | { | |
514 | struct batadv_softif_vlan *vlan; | |
515 | ||
516 | vlan = container_of(ref, struct batadv_softif_vlan, refcount); | |
517 | ||
518 | spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
519 | hlist_del_rcu(&vlan->list); | |
520 | spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); | |
521 | ||
522 | kfree_rcu(vlan, rcu); | |
523 | } | |
524 | ||
5d2c05b2 | 525 | /** |
7e9a8c2c | 526 | * batadv_softif_vlan_put() - decrease the vlan object refcounter and |
6be4d30c | 527 | * possibly release it |
e51f0397 | 528 | * @vlan: the vlan object to release |
5d2c05b2 | 529 | */ |
9c3bf081 | 530 | void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan) |
5d2c05b2 | 531 | { |
354136bc ML |
532 | if (!vlan) |
533 | return; | |
534 | ||
6be4d30c | 535 | kref_put(&vlan->refcount, batadv_softif_vlan_release); |
5d2c05b2 AQ |
536 | } |
537 | ||
538 | /** | |
7e9a8c2c | 539 | * batadv_softif_vlan_get() - get the vlan object for a specific vid |
5d2c05b2 AQ |
540 | * @bat_priv: the bat priv with all the soft interface information |
541 | * @vid: the identifier of the vlan object to retrieve | |
542 | * | |
62fe710f | 543 | * Return: the private data of the vlan matching the vid passed as argument or |
5d2c05b2 AQ |
544 | * NULL otherwise. The refcounter of the returned object is incremented by 1. |
545 | */ | |
90f4435d AQ |
546 | struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, |
547 | unsigned short vid) | |
5d2c05b2 AQ |
548 | { |
549 | struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; | |
550 | ||
551 | rcu_read_lock(); | |
552 | hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { | |
553 | if (vlan_tmp->vid != vid) | |
554 | continue; | |
555 | ||
6be4d30c | 556 | if (!kref_get_unless_zero(&vlan_tmp->refcount)) |
5d2c05b2 AQ |
557 | continue; |
558 | ||
559 | vlan = vlan_tmp; | |
560 | break; | |
561 | } | |
562 | rcu_read_unlock(); | |
563 | ||
564 | return vlan; | |
565 | } | |
566 | ||
567 | /** | |
7e9a8c2c | 568 | * batadv_softif_create_vlan() - allocate the needed resources for a new vlan |
5d2c05b2 AQ |
569 | * @bat_priv: the bat priv with all the soft interface information |
570 | * @vid: the VLAN identifier | |
571 | * | |
62fe710f | 572 | * Return: 0 on success, a negative error otherwise. |
5d2c05b2 AQ |
573 | */ |
574 | int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) | |
575 | { | |
576 | struct batadv_softif_vlan *vlan; | |
90f4435d | 577 | int err; |
5d2c05b2 | 578 | |
94cb82f5 SE |
579 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
580 | ||
5d2c05b2 AQ |
581 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
582 | if (vlan) { | |
9c3bf081 | 583 | batadv_softif_vlan_put(vlan); |
94cb82f5 | 584 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); |
5d2c05b2 AQ |
585 | return -EEXIST; |
586 | } | |
587 | ||
588 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
94cb82f5 SE |
589 | if (!vlan) { |
590 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
5d2c05b2 | 591 | return -ENOMEM; |
94cb82f5 | 592 | } |
5d2c05b2 | 593 | |
35df3b29 | 594 | vlan->bat_priv = bat_priv; |
5d2c05b2 | 595 | vlan->vid = vid; |
6be4d30c | 596 | kref_init(&vlan->refcount); |
5d2c05b2 | 597 | |
b8cbd81d AQ |
598 | atomic_set(&vlan->ap_isolation, 0); |
599 | ||
94cb82f5 SE |
600 | kref_get(&vlan->refcount); |
601 | hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); | |
602 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); | |
603 | ||
604 | /* batadv_sysfs_add_vlan cannot be in the spinlock section due to the | |
605 | * sleeping behavior of the sysfs functions and the fs_reclaim lock | |
606 | */ | |
90f4435d AQ |
607 | err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); |
608 | if (err) { | |
94cb82f5 SE |
609 | /* ref for the function */ |
610 | batadv_softif_vlan_put(vlan); | |
611 | ||
612 | /* ref for the list */ | |
613 | batadv_softif_vlan_put(vlan); | |
90f4435d AQ |
614 | return err; |
615 | } | |
616 | ||
5d2c05b2 AQ |
617 | /* add a new TT local entry. This one will be marked with the NOPURGE |
618 | * flag | |
619 | */ | |
620 | batadv_tt_local_add(bat_priv->soft_iface, | |
621 | bat_priv->soft_iface->dev_addr, vid, | |
9464d071 | 622 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); |
5d2c05b2 | 623 | |
df28ca6b SE |
624 | /* don't return reference to new softif_vlan */ |
625 | batadv_softif_vlan_put(vlan); | |
626 | ||
5d2c05b2 AQ |
627 | return 0; |
628 | } | |
629 | ||
630 | /** | |
7e9a8c2c | 631 | * batadv_softif_destroy_vlan() - remove and destroy a softif_vlan object |
5d2c05b2 AQ |
632 | * @bat_priv: the bat priv with all the soft interface information |
633 | * @vlan: the object to remove | |
634 | */ | |
635 | static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, | |
636 | struct batadv_softif_vlan *vlan) | |
637 | { | |
5d2c05b2 AQ |
638 | /* explicitly remove the associated TT local entry because it is marked |
639 | * with the NOPURGE flag | |
640 | */ | |
641 | batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, | |
642 | vlan->vid, "vlan interface destroyed", false); | |
643 | ||
35df3b29 | 644 | batadv_sysfs_del_vlan(bat_priv, vlan); |
9c3bf081 | 645 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
646 | } |
647 | ||
648 | /** | |
7e9a8c2c | 649 | * batadv_interface_add_vid() - ndo_add_vid API implementation |
5d2c05b2 | 650 | * @dev: the netdev of the mesh interface |
7afcbbef | 651 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
652 | * @vid: identifier of the new vlan |
653 | * | |
654 | * Set up all the internal structures for handling the new vlan on top of the | |
655 | * mesh interface | |
656 | * | |
62fe710f | 657 | * Return: 0 on success or a negative error code in case of failure. |
5d2c05b2 AQ |
658 | */ |
659 | static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, | |
660 | unsigned short vid) | |
661 | { | |
662 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
35df3b29 AQ |
663 | struct batadv_softif_vlan *vlan; |
664 | int ret; | |
5d2c05b2 AQ |
665 | |
666 | /* only 802.1Q vlans are supported. | |
667 | * batman-adv does not know how to handle other types | |
668 | */ | |
669 | if (proto != htons(ETH_P_8021Q)) | |
670 | return -EINVAL; | |
671 | ||
672 | vid |= BATADV_VLAN_HAS_TAG; | |
673 | ||
35df3b29 AQ |
674 | /* if a new vlan is getting created and it already exists, it means that |
675 | * it was not deleted yet. batadv_softif_vlan_get() increases the | |
676 | * refcount in order to revive the object. | |
677 | * | |
678 | * if it does not exist then create it. | |
679 | */ | |
680 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
681 | if (!vlan) | |
682 | return batadv_softif_create_vlan(bat_priv, vid); | |
683 | ||
684 | /* recreate the sysfs object if it was already destroyed (and it should | |
685 | * be since we received a kill_vid() for this vlan | |
686 | */ | |
687 | if (!vlan->kobj) { | |
688 | ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); | |
689 | if (ret) { | |
9c3bf081 | 690 | batadv_softif_vlan_put(vlan); |
35df3b29 AQ |
691 | return ret; |
692 | } | |
693 | } | |
694 | ||
695 | /* add a new TT local entry. This one will be marked with the NOPURGE | |
696 | * flag. This must be added again, even if the vlan object already | |
697 | * exists, because the entry was deleted by kill_vid() | |
698 | */ | |
699 | batadv_tt_local_add(bat_priv->soft_iface, | |
700 | bat_priv->soft_iface->dev_addr, vid, | |
701 | BATADV_NULL_IFINDEX, BATADV_NO_MARK); | |
702 | ||
703 | return 0; | |
5d2c05b2 AQ |
704 | } |
705 | ||
706 | /** | |
7e9a8c2c | 707 | * batadv_interface_kill_vid() - ndo_kill_vid API implementation |
5d2c05b2 | 708 | * @dev: the netdev of the mesh interface |
7afcbbef | 709 | * @proto: protocol of the the vlan id |
5d2c05b2 AQ |
710 | * @vid: identifier of the deleted vlan |
711 | * | |
712 | * Destroy all the internal structures used to handle the vlan identified by vid | |
713 | * on top of the mesh interface | |
714 | * | |
62fe710f | 715 | * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q |
5d2c05b2 AQ |
716 | * or -ENOENT if the specified vlan id wasn't registered. |
717 | */ | |
718 | static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, | |
719 | unsigned short vid) | |
720 | { | |
721 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
722 | struct batadv_softif_vlan *vlan; | |
723 | ||
724 | /* only 802.1Q vlans are supported. batman-adv does not know how to | |
725 | * handle other types | |
726 | */ | |
727 | if (proto != htons(ETH_P_8021Q)) | |
728 | return -EINVAL; | |
729 | ||
730 | vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); | |
731 | if (!vlan) | |
732 | return -ENOENT; | |
733 | ||
734 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
735 | ||
736 | /* finally free the vlan object */ | |
9c3bf081 | 737 | batadv_softif_vlan_put(vlan); |
5d2c05b2 AQ |
738 | |
739 | return 0; | |
740 | } | |
741 | ||
1a33e10e CW |
742 | /* batman-adv network devices have devices nesting below it and are a special |
743 | * "super class" of normal network devices; split their locks off into a | |
744 | * separate class since they always nest. | |
745 | */ | |
746 | static struct lock_class_key batadv_netdev_xmit_lock_key; | |
845e0ebb | 747 | static struct lock_class_key batadv_netdev_addr_lock_key; |
1a33e10e CW |
748 | |
749 | /** | |
750 | * batadv_set_lockdep_class_one() - Set lockdep class for a single tx queue | |
751 | * @dev: device which owns the tx queue | |
752 | * @txq: tx queue to modify | |
753 | * @_unused: always NULL | |
754 | */ | |
755 | static void batadv_set_lockdep_class_one(struct net_device *dev, | |
756 | struct netdev_queue *txq, | |
757 | void *_unused) | |
758 | { | |
759 | lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); | |
760 | } | |
761 | ||
762 | /** | |
763 | * batadv_set_lockdep_class() - Set txq and addr_list lockdep class | |
764 | * @dev: network device to modify | |
765 | */ | |
766 | static void batadv_set_lockdep_class(struct net_device *dev) | |
767 | { | |
845e0ebb | 768 | lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); |
1a33e10e CW |
769 | netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); |
770 | } | |
771 | ||
37130293 | 772 | /** |
7e9a8c2c | 773 | * batadv_softif_init_late() - late stage initialization of soft interface |
37130293 SE |
774 | * @dev: registered network device to modify |
775 | * | |
62fe710f | 776 | * Return: error code on failures |
37130293 SE |
777 | */ |
778 | static int batadv_softif_init_late(struct net_device *dev) | |
c6c8fea2 | 779 | { |
56303d34 | 780 | struct batadv_priv *bat_priv; |
6b5e971a | 781 | u32 random_seqno; |
c6c8fea2 | 782 | int ret; |
6b5e971a | 783 | size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM; |
c6c8fea2 | 784 | |
1a33e10e CW |
785 | batadv_set_lockdep_class(dev); |
786 | ||
37130293 SE |
787 | bat_priv = netdev_priv(dev); |
788 | bat_priv->soft_iface = dev; | |
1c9b0550 ML |
789 | |
790 | /* batadv_interface_stats() needs to be available as soon as | |
791 | * register_netdevice() has been called | |
792 | */ | |
6b5e971a | 793 | bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64)); |
1c9b0550 | 794 | if (!bat_priv->bat_counters) |
37130293 | 795 | return -ENOMEM; |
c6c8fea2 | 796 | |
c6c8fea2 SE |
797 | atomic_set(&bat_priv->aggregated_ogms, 1); |
798 | atomic_set(&bat_priv->bonding, 0); | |
fa706554 | 799 | #ifdef CONFIG_BATMAN_ADV_BLA |
dab7b621 | 800 | atomic_set(&bat_priv->bridge_loop_avoidance, 1); |
fa706554 | 801 | #endif |
33af49ad AQ |
802 | #ifdef CONFIG_BATMAN_ADV_DAT |
803 | atomic_set(&bat_priv->distributed_arp_table, 1); | |
60432d75 LL |
804 | #endif |
805 | #ifdef CONFIG_BATMAN_ADV_MCAST | |
1d8ab8d3 | 806 | atomic_set(&bat_priv->multicast_mode, 1); |
32e72744 | 807 | atomic_set(&bat_priv->multicast_fanout, 16); |
ab49886e | 808 | atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); |
4c8755d6 LL |
809 | atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); |
810 | atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); | |
33af49ad | 811 | #endif |
3a24a63e | 812 | atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF); |
414254e3 ML |
813 | atomic_set(&bat_priv->gw.bandwidth_down, 100); |
814 | atomic_set(&bat_priv->gw.bandwidth_up, 20); | |
c6c8fea2 | 815 | atomic_set(&bat_priv->orig_interval, 1000); |
e03366ea | 816 | atomic_set(&bat_priv->hop_penalty, 30); |
0c430d0d | 817 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
c6c8fea2 | 818 | atomic_set(&bat_priv->log_level, 0); |
0c430d0d | 819 | #endif |
c6c8fea2 | 820 | atomic_set(&bat_priv->fragmentation, 1); |
a19d3d85 | 821 | atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN); |
42d0b044 SE |
822 | atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); |
823 | atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); | |
c6c8fea2 | 824 | |
39c75a51 | 825 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 | 826 | atomic_set(&bat_priv->bcast_seqno, 1); |
807736f6 SE |
827 | atomic_set(&bat_priv->tt.vn, 0); |
828 | atomic_set(&bat_priv->tt.local_changes, 0); | |
829 | atomic_set(&bat_priv->tt.ogm_append_cnt, 0); | |
830 | #ifdef CONFIG_BATMAN_ADV_BLA | |
831 | atomic_set(&bat_priv->bla.num_requests, 0); | |
832 | #endif | |
33a3bb4a AQ |
833 | atomic_set(&bat_priv->tp_num, 0); |
834 | ||
807736f6 SE |
835 | bat_priv->tt.last_changeset = NULL; |
836 | bat_priv->tt.last_changeset_len = 0; | |
c42edfe3 AQ |
837 | bat_priv->isolation_mark = 0; |
838 | bat_priv->isolation_mark_mask = 0; | |
c6c8fea2 | 839 | |
ee75ed88 MH |
840 | /* randomize initial seqno to avoid collision */ |
841 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
842 | atomic_set(&bat_priv->frag_seqno, random_seqno); | |
843 | ||
c6c8fea2 | 844 | bat_priv->primary_if = NULL; |
c6c8fea2 | 845 | |
d353d8d4 MH |
846 | batadv_nc_init_bat_priv(bat_priv); |
847 | ||
37130293 | 848 | ret = batadv_algo_select(bat_priv, batadv_routing_algo); |
c6c8fea2 | 849 | if (ret < 0) |
37130293 | 850 | goto free_bat_counters; |
c6c8fea2 | 851 | |
37130293 | 852 | ret = batadv_debugfs_add_meshif(dev); |
c6c8fea2 | 853 | if (ret < 0) |
37130293 | 854 | goto free_bat_counters; |
c6c8fea2 | 855 | |
37130293 | 856 | ret = batadv_mesh_init(dev); |
c6c8fea2 SE |
857 | if (ret < 0) |
858 | goto unreg_debugfs; | |
859 | ||
37130293 | 860 | return 0; |
c6c8fea2 SE |
861 | |
862 | unreg_debugfs: | |
37130293 | 863 | batadv_debugfs_del_meshif(dev); |
1c9b0550 ML |
864 | free_bat_counters: |
865 | free_percpu(bat_priv->bat_counters); | |
f69ae770 | 866 | bat_priv->bat_counters = NULL; |
37130293 SE |
867 | |
868 | return ret; | |
869 | } | |
870 | ||
3dbd550b | 871 | /** |
7e9a8c2c | 872 | * batadv_softif_slave_add() - Add a slave interface to a batadv_soft_interface |
3dbd550b SE |
873 | * @dev: batadv_soft_interface used as master interface |
874 | * @slave_dev: net_device which should become the slave interface | |
bad5680b | 875 | * @extack: extended ACK report struct |
3dbd550b | 876 | * |
62fe710f | 877 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
878 | */ |
879 | static int batadv_softif_slave_add(struct net_device *dev, | |
33eaf2a6 DA |
880 | struct net_device *slave_dev, |
881 | struct netlink_ext_ack *extack) | |
3dbd550b SE |
882 | { |
883 | struct batadv_hard_iface *hard_iface; | |
2cd45a06 | 884 | struct net *net = dev_net(dev); |
3dbd550b SE |
885 | int ret = -EINVAL; |
886 | ||
887 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
00f548bf | 888 | if (!hard_iface || hard_iface->soft_iface) |
3dbd550b SE |
889 | goto out; |
890 | ||
2cd45a06 | 891 | ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); |
3dbd550b SE |
892 | |
893 | out: | |
894 | if (hard_iface) | |
82047ad7 | 895 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
896 | return ret; |
897 | } | |
898 | ||
899 | /** | |
7e9a8c2c | 900 | * batadv_softif_slave_del() - Delete a slave iface from a batadv_soft_interface |
3dbd550b SE |
901 | * @dev: batadv_soft_interface used as master interface |
902 | * @slave_dev: net_device which should be removed from the master interface | |
903 | * | |
62fe710f | 904 | * Return: 0 if successful or error otherwise. |
3dbd550b SE |
905 | */ |
906 | static int batadv_softif_slave_del(struct net_device *dev, | |
907 | struct net_device *slave_dev) | |
908 | { | |
909 | struct batadv_hard_iface *hard_iface; | |
910 | int ret = -EINVAL; | |
911 | ||
912 | hard_iface = batadv_hardif_get_by_netdev(slave_dev); | |
913 | ||
914 | if (!hard_iface || hard_iface->soft_iface != dev) | |
915 | goto out; | |
916 | ||
917 | batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); | |
918 | ret = 0; | |
919 | ||
920 | out: | |
921 | if (hard_iface) | |
82047ad7 | 922 | batadv_hardif_put(hard_iface); |
3dbd550b SE |
923 | return ret; |
924 | } | |
925 | ||
37130293 SE |
926 | static const struct net_device_ops batadv_netdev_ops = { |
927 | .ndo_init = batadv_softif_init_late, | |
928 | .ndo_open = batadv_interface_open, | |
929 | .ndo_stop = batadv_interface_release, | |
930 | .ndo_get_stats = batadv_interface_stats, | |
5d2c05b2 AQ |
931 | .ndo_vlan_rx_add_vid = batadv_interface_add_vid, |
932 | .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, | |
37130293 SE |
933 | .ndo_set_mac_address = batadv_interface_set_mac_addr, |
934 | .ndo_change_mtu = batadv_interface_change_mtu, | |
a4deee1a | 935 | .ndo_set_rx_mode = batadv_interface_set_rx_mode, |
37130293 | 936 | .ndo_start_xmit = batadv_interface_tx, |
3dbd550b SE |
937 | .ndo_validate_addr = eth_validate_addr, |
938 | .ndo_add_slave = batadv_softif_slave_add, | |
939 | .ndo_del_slave = batadv_softif_slave_del, | |
37130293 SE |
940 | }; |
941 | ||
5405e19e SE |
942 | static void batadv_get_drvinfo(struct net_device *dev, |
943 | struct ethtool_drvinfo *info) | |
944 | { | |
529a8f93 SE |
945 | strscpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); |
946 | strscpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); | |
947 | strscpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
948 | strscpy(info->bus_info, "batman", sizeof(info->bus_info)); | |
5405e19e SE |
949 | } |
950 | ||
951 | /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 | |
952 | * Declare each description string in struct.name[] to get fixed sized buffer | |
953 | * and compile time checking for strings longer than ETH_GSTRING_LEN. | |
954 | */ | |
955 | static const struct { | |
956 | const char name[ETH_GSTRING_LEN]; | |
957 | } batadv_counters_strings[] = { | |
958 | { "tx" }, | |
959 | { "tx_bytes" }, | |
960 | { "tx_dropped" }, | |
961 | { "rx" }, | |
962 | { "rx_bytes" }, | |
963 | { "forward" }, | |
964 | { "forward_bytes" }, | |
965 | { "mgmt_tx" }, | |
966 | { "mgmt_tx_bytes" }, | |
967 | { "mgmt_rx" }, | |
968 | { "mgmt_rx_bytes" }, | |
969 | { "frag_tx" }, | |
970 | { "frag_tx_bytes" }, | |
971 | { "frag_rx" }, | |
972 | { "frag_rx_bytes" }, | |
973 | { "frag_fwd" }, | |
974 | { "frag_fwd_bytes" }, | |
975 | { "tt_request_tx" }, | |
976 | { "tt_request_rx" }, | |
977 | { "tt_response_tx" }, | |
978 | { "tt_response_rx" }, | |
979 | { "tt_roam_adv_tx" }, | |
980 | { "tt_roam_adv_rx" }, | |
981 | #ifdef CONFIG_BATMAN_ADV_DAT | |
982 | { "dat_get_tx" }, | |
983 | { "dat_get_rx" }, | |
984 | { "dat_put_tx" }, | |
985 | { "dat_put_rx" }, | |
986 | { "dat_cached_reply_tx" }, | |
987 | #endif | |
988 | #ifdef CONFIG_BATMAN_ADV_NC | |
989 | { "nc_code" }, | |
990 | { "nc_code_bytes" }, | |
991 | { "nc_recode" }, | |
992 | { "nc_recode_bytes" }, | |
993 | { "nc_buffer" }, | |
994 | { "nc_decode" }, | |
995 | { "nc_decode_bytes" }, | |
996 | { "nc_decode_failed" }, | |
997 | { "nc_sniffed" }, | |
998 | #endif | |
999 | }; | |
1000 | ||
1001 | static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
1002 | { | |
1003 | if (stringset == ETH_SS_STATS) | |
1004 | memcpy(data, batadv_counters_strings, | |
1005 | sizeof(batadv_counters_strings)); | |
1006 | } | |
1007 | ||
1008 | static void batadv_get_ethtool_stats(struct net_device *dev, | |
1009 | struct ethtool_stats *stats, u64 *data) | |
1010 | { | |
1011 | struct batadv_priv *bat_priv = netdev_priv(dev); | |
1012 | int i; | |
1013 | ||
1014 | for (i = 0; i < BATADV_CNT_NUM; i++) | |
1015 | data[i] = batadv_sum_counter(bat_priv, i); | |
1016 | } | |
1017 | ||
1018 | static int batadv_get_sset_count(struct net_device *dev, int stringset) | |
1019 | { | |
1020 | if (stringset == ETH_SS_STATS) | |
1021 | return BATADV_CNT_NUM; | |
1022 | ||
1023 | return -EOPNOTSUPP; | |
1024 | } | |
1025 | ||
1026 | static const struct ethtool_ops batadv_ethtool_ops = { | |
1027 | .get_drvinfo = batadv_get_drvinfo, | |
1028 | .get_link = ethtool_op_get_link, | |
1029 | .get_strings = batadv_get_strings, | |
1030 | .get_ethtool_stats = batadv_get_ethtool_stats, | |
1031 | .get_sset_count = batadv_get_sset_count, | |
1032 | }; | |
1033 | ||
b3246020 | 1034 | /** |
7e9a8c2c | 1035 | * batadv_softif_free() - Deconstructor of batadv_soft_interface |
b3246020 SE |
1036 | * @dev: Device to cleanup and remove |
1037 | */ | |
1038 | static void batadv_softif_free(struct net_device *dev) | |
1039 | { | |
1040 | batadv_debugfs_del_meshif(dev); | |
1041 | batadv_mesh_free(dev); | |
0c501345 AQ |
1042 | |
1043 | /* some scheduled RCU callbacks need the bat_priv struct to accomplish | |
1044 | * their tasks. Wait for them all to be finished before freeing the | |
1045 | * netdev and its private data (bat_priv) | |
1046 | */ | |
1047 | rcu_barrier(); | |
b3246020 SE |
1048 | } |
1049 | ||
37130293 | 1050 | /** |
7e9a8c2c | 1051 | * batadv_softif_init_early() - early stage initialization of soft interface |
37130293 SE |
1052 | * @dev: registered network device to modify |
1053 | */ | |
1054 | static void batadv_softif_init_early(struct net_device *dev) | |
1055 | { | |
37130293 SE |
1056 | ether_setup(dev); |
1057 | ||
1058 | dev->netdev_ops = &batadv_netdev_ops; | |
cf124db5 DM |
1059 | dev->needs_free_netdev = true; |
1060 | dev->priv_destructor = batadv_softif_free; | |
0d21cdaa | 1061 | dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL; |
a7ea49af | 1062 | dev->features |= NETIF_F_LLTX; |
cdf73703 | 1063 | dev->priv_flags |= IFF_NO_QUEUE; |
37130293 SE |
1064 | |
1065 | /* can't call min_mtu, because the needed variables | |
1066 | * have not been initialized yet | |
1067 | */ | |
1068 | dev->mtu = ETH_DATA_LEN; | |
37130293 SE |
1069 | |
1070 | /* generate random address */ | |
1071 | eth_hw_addr_random(dev); | |
1072 | ||
7ad24ea4 | 1073 | dev->ethtool_ops = &batadv_ethtool_ops; |
37130293 SE |
1074 | } |
1075 | ||
ff15c27c SE |
1076 | /** |
1077 | * batadv_softif_create() - Create and register soft interface | |
1078 | * @net: the applicable net namespace | |
1079 | * @name: name of the new soft interface | |
1080 | * | |
1081 | * Return: newly allocated soft_interface, NULL on errors | |
1082 | */ | |
2cd45a06 | 1083 | struct net_device *batadv_softif_create(struct net *net, const char *name) |
37130293 SE |
1084 | { |
1085 | struct net_device *soft_iface; | |
1086 | int ret; | |
1087 | ||
1088 | soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, | |
c835a677 | 1089 | NET_NAME_UNKNOWN, batadv_softif_init_early); |
37130293 SE |
1090 | if (!soft_iface) |
1091 | return NULL; | |
1092 | ||
2cd45a06 AL |
1093 | dev_net_set(soft_iface, net); |
1094 | ||
a4ac28c0 SE |
1095 | soft_iface->rtnl_link_ops = &batadv_link_ops; |
1096 | ||
37130293 SE |
1097 | ret = register_netdevice(soft_iface); |
1098 | if (ret < 0) { | |
1099 | pr_err("Unable to register the batman interface '%s': %i\n", | |
1100 | name, ret); | |
1101 | free_netdev(soft_iface); | |
1102 | return NULL; | |
1103 | } | |
1104 | ||
1105 | return soft_iface; | |
c6c8fea2 SE |
1106 | } |
1107 | ||
e07932ae | 1108 | /** |
7e9a8c2c | 1109 | * batadv_softif_destroy_sysfs() - deletion of batadv_soft_interface via sysfs |
e07932ae ML |
1110 | * @soft_iface: the to-be-removed batman-adv interface |
1111 | */ | |
1112 | void batadv_softif_destroy_sysfs(struct net_device *soft_iface) | |
c6c8fea2 | 1113 | { |
5bc44dc8 | 1114 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
569c9850 SE |
1115 | struct batadv_softif_vlan *vlan; |
1116 | ||
1117 | ASSERT_RTNL(); | |
1118 | ||
1119 | /* destroy the "untagged" VLAN */ | |
1120 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1121 | if (vlan) { | |
1122 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1123 | batadv_softif_vlan_put(vlan); | |
1124 | } | |
5bc44dc8 | 1125 | |
569c9850 SE |
1126 | batadv_sysfs_del_meshif(soft_iface); |
1127 | unregister_netdevice(soft_iface); | |
c6c8fea2 SE |
1128 | } |
1129 | ||
a4ac28c0 | 1130 | /** |
7e9a8c2c SE |
1131 | * batadv_softif_destroy_netlink() - deletion of batadv_soft_interface via |
1132 | * netlink | |
a4ac28c0 SE |
1133 | * @soft_iface: the to-be-removed batman-adv interface |
1134 | * @head: list pointer | |
1135 | */ | |
1136 | static void batadv_softif_destroy_netlink(struct net_device *soft_iface, | |
1137 | struct list_head *head) | |
1138 | { | |
420cb1b7 | 1139 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
a4ac28c0 | 1140 | struct batadv_hard_iface *hard_iface; |
420cb1b7 | 1141 | struct batadv_softif_vlan *vlan; |
a4ac28c0 SE |
1142 | |
1143 | list_for_each_entry(hard_iface, &batadv_hardif_list, list) { | |
1144 | if (hard_iface->soft_iface == soft_iface) | |
1145 | batadv_hardif_disable_interface(hard_iface, | |
1146 | BATADV_IF_CLEANUP_KEEP); | |
1147 | } | |
1148 | ||
420cb1b7 SE |
1149 | /* destroy the "untagged" VLAN */ |
1150 | vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); | |
1151 | if (vlan) { | |
1152 | batadv_softif_destroy_vlan(bat_priv, vlan); | |
1153 | batadv_softif_vlan_put(vlan); | |
1154 | } | |
1155 | ||
a4ac28c0 SE |
1156 | batadv_sysfs_del_meshif(soft_iface); |
1157 | unregister_netdevice_queue(soft_iface, head); | |
1158 | } | |
1159 | ||
ff15c27c SE |
1160 | /** |
1161 | * batadv_softif_is_valid() - Check whether device is a batadv soft interface | |
1162 | * @net_dev: device which should be checked | |
1163 | * | |
1164 | * Return: true when net_dev is a batman-adv interface, false otherwise | |
1165 | */ | |
4b426b10 | 1166 | bool batadv_softif_is_valid(const struct net_device *net_dev) |
e44d8fe2 | 1167 | { |
0294ca0d | 1168 | if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) |
4b426b10 | 1169 | return true; |
e44d8fe2 | 1170 | |
4b426b10 | 1171 | return false; |
e44d8fe2 SE |
1172 | } |
1173 | ||
a4ac28c0 SE |
1174 | struct rtnl_link_ops batadv_link_ops __read_mostly = { |
1175 | .kind = "batadv", | |
1176 | .priv_size = sizeof(struct batadv_priv), | |
1177 | .setup = batadv_softif_init_early, | |
1178 | .dellink = batadv_softif_destroy_netlink, | |
1179 | }; |