1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) B.A.T.M.A.N. contributors:
3 *
4 * Matthias Schiffer
5 */
6
7 #include "netlink.h"
8 #include "main.h"
9
10 #include <linux/array_size.h>
11 #include <linux/atomic.h>
12 #include <linux/bitops.h>
13 #include <linux/bug.h>
14 #include <linux/byteorder/generic.h>
15 #include <linux/cache.h>
16 #include <linux/err.h>
17 #include <linux/errno.h>
18 #include <linux/gfp.h>
19 #include <linux/if_ether.h>
20 #include <linux/if_vlan.h>
21 #include <linux/init.h>
22 #include <linux/limits.h>
23 #include <linux/list.h>
24 #include <linux/minmax.h>
25 #include <linux/netdevice.h>
26 #include <linux/netlink.h>
27 #include <linux/printk.h>
28 #include <linux/rtnetlink.h>
29 #include <linux/skbuff.h>
30 #include <linux/stddef.h>
31 #include <linux/types.h>
32 #include <net/genetlink.h>
33 #include <net/net_namespace.h>
34 #include <net/netlink.h>
35 #include <net/sock.h>
36 #include <uapi/linux/batadv_packet.h>
37 #include <uapi/linux/batman_adv.h>
38
39 #include "bat_algo.h"
40 #include "bridge_loop_avoidance.h"
41 #include "distributed-arp-table.h"
42 #include "gateway_client.h"
43 #include "gateway_common.h"
44 #include "hard-interface.h"
45 #include "log.h"
46 #include "multicast.h"
47 #include "network-coding.h"
48 #include "originator.h"
49 #include "soft-interface.h"
50 #include "tp_meter.h"
51 #include "translation-table.h"
52
53 struct genl_family batadv_netlink_family;
54
55 /* multicast groups */
56 enum batadv_netlink_multicast_groups {
57 BATADV_NL_MCGRP_CONFIG,
58 BATADV_NL_MCGRP_TPMETER,
59 };
60
61 /**
62 * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags
63 */
64 enum batadv_genl_ops_flags {
65 /**
66 * @BATADV_FLAG_NEED_MESH: request requires valid soft interface in
67 * attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be
68 * saved in info->user_ptr[0]
69 */
70 BATADV_FLAG_NEED_MESH = BIT(0),
71
72 /**
73 * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in
74 * attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be
75 * saved in info->user_ptr[1]
76 */
77 BATADV_FLAG_NEED_HARDIF = BIT(1),
78
79 /**
80 * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in
81 * attribute BATADV_ATTR_VLANID and expects a pointer to it to be
82 * saved in info->user_ptr[1]
83 */
84 BATADV_FLAG_NEED_VLAN = BIT(2),
85 };
86
87 static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
88 [BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG },
89 [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
90 };
91
92 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
93 [BATADV_ATTR_VERSION] = { .type = NLA_STRING },
94 [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
95 [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
96 [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
97 [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
98 [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
99 [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
100 [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
101 [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
102 [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
103 [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
104 [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
105 [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
106 [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
107 [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
108 [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
109 [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
110 [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
111 [BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
112 [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
113 [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
114 [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
115 [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
116 [BATADV_ATTR_TQ] = { .type = NLA_U8 },
117 [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
118 [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
119 [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
120 [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
121 [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
122 [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN },
123 [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
124 [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN },
125 [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
126 [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 },
127 [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN },
128 [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 },
129 [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 },
130 [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 },
131 [BATADV_ATTR_VLANID] = { .type = NLA_U16 },
132 [BATADV_ATTR_AGGREGATED_OGMS_ENABLED] = { .type = NLA_U8 },
133 [BATADV_ATTR_AP_ISOLATION_ENABLED] = { .type = NLA_U8 },
134 [BATADV_ATTR_ISOLATION_MARK] = { .type = NLA_U32 },
135 [BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 },
136 [BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 },
137 [BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 },
138 [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 },
139 [BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 },
140 [BATADV_ATTR_GW_BANDWIDTH_DOWN] = { .type = NLA_U32 },
141 [BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 },
142 [BATADV_ATTR_GW_MODE] = { .type = NLA_U8 },
143 [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 },
144 [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 },
145 [BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 },
146 [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 },
147 [BATADV_ATTR_MULTICAST_FANOUT] = { .type = NLA_U32 },
148 [BATADV_ATTR_NETWORK_CODING_ENABLED] = { .type = NLA_U8 },
149 [BATADV_ATTR_ORIG_INTERVAL] = { .type = NLA_U32 },
150 [BATADV_ATTR_ELP_INTERVAL] = { .type = NLA_U32 },
151 [BATADV_ATTR_THROUGHPUT_OVERRIDE] = { .type = NLA_U32 },
152 };
153
154 /**
155 * batadv_netlink_get_ifindex() - Extract an interface index from a message
156 * @nlh: Message header
157 * @attrtype: Attribute which holds an interface index
158 *
159 * Return: interface index, or 0.
160 */
161 int
batadv_netlink_get_ifindex(const struct nlmsghdr * nlh,int attrtype)162 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
163 {
164 struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
165
166 return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
167 }
168
169 /**
170 * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation softif attribute
171 * @msg: Netlink message to dump into
172 * @bat_priv: the bat priv with all the soft interface information
173 *
174 * Return: 0 on success or negative error number in case of failure
175 */
batadv_netlink_mesh_fill_ap_isolation(struct sk_buff * msg,struct batadv_priv * bat_priv)176 static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg,
177 struct batadv_priv *bat_priv)
178 {
179 struct batadv_softif_vlan *vlan;
180 u8 ap_isolation;
181
182 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
183 if (!vlan)
184 return 0;
185
186 ap_isolation = atomic_read(&vlan->ap_isolation);
187 batadv_softif_vlan_put(vlan);
188
189 return nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
190 !!ap_isolation);
191 }
192
193 /**
194 * batadv_netlink_set_mesh_ap_isolation() - Set ap_isolation from genl msg
195 * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute
196 * @bat_priv: the bat priv with all the soft interface information
197 *
198 * Return: 0 on success or negative error number in case of failure
199 */
batadv_netlink_set_mesh_ap_isolation(struct nlattr * attr,struct batadv_priv * bat_priv)200 static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr,
201 struct batadv_priv *bat_priv)
202 {
203 struct batadv_softif_vlan *vlan;
204
205 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
206 if (!vlan)
207 return -ENOENT;
208
209 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
210 batadv_softif_vlan_put(vlan);
211
212 return 0;
213 }
214
215 /**
216 * batadv_netlink_mesh_fill() - Fill message with mesh attributes
217 * @msg: Netlink message to dump into
218 * @bat_priv: the bat priv with all the soft interface information
219 * @cmd: type of message to generate
220 * @portid: Port making netlink request
221 * @seq: sequence number for message
222 * @flags: Additional flags for message
223 *
224 * Return: 0 on success or negative error number in case of failure
225 */
batadv_netlink_mesh_fill(struct sk_buff * msg,struct batadv_priv * bat_priv,enum batadv_nl_commands cmd,u32 portid,u32 seq,int flags)226 static int batadv_netlink_mesh_fill(struct sk_buff *msg,
227 struct batadv_priv *bat_priv,
228 enum batadv_nl_commands cmd,
229 u32 portid, u32 seq, int flags)
230 {
231 struct net_device *soft_iface = bat_priv->soft_iface;
232 struct batadv_hard_iface *primary_if = NULL;
233 struct net_device *hard_iface;
234 void *hdr;
235
236 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
237 if (!hdr)
238 return -ENOBUFS;
239
240 if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
241 nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
242 bat_priv->algo_ops->name) ||
243 nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
244 nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
245 nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
246 soft_iface->dev_addr) ||
247 nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
248 (u8)atomic_read(&bat_priv->tt.vn)))
249 goto nla_put_failure;
250
251 #ifdef CONFIG_BATMAN_ADV_BLA
252 if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
253 ntohs(bat_priv->bla.claim_dest.group)))
254 goto nla_put_failure;
255 #endif
256
257 if (batadv_mcast_mesh_info_put(msg, bat_priv))
258 goto nla_put_failure;
259
260 primary_if = batadv_primary_if_get_selected(bat_priv);
261 if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
262 hard_iface = primary_if->net_dev;
263
264 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
265 hard_iface->ifindex) ||
266 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
267 hard_iface->name) ||
268 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
269 hard_iface->dev_addr))
270 goto nla_put_failure;
271 }
272
273 if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS_ENABLED,
274 !!atomic_read(&bat_priv->aggregated_ogms)))
275 goto nla_put_failure;
276
277 if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv))
278 goto nla_put_failure;
279
280 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MARK,
281 bat_priv->isolation_mark))
282 goto nla_put_failure;
283
284 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MASK,
285 bat_priv->isolation_mark_mask))
286 goto nla_put_failure;
287
288 if (nla_put_u8(msg, BATADV_ATTR_BONDING_ENABLED,
289 !!atomic_read(&bat_priv->bonding)))
290 goto nla_put_failure;
291
292 #ifdef CONFIG_BATMAN_ADV_BLA
293 if (nla_put_u8(msg, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
294 !!atomic_read(&bat_priv->bridge_loop_avoidance)))
295 goto nla_put_failure;
296 #endif /* CONFIG_BATMAN_ADV_BLA */
297
298 #ifdef CONFIG_BATMAN_ADV_DAT
299 if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
300 !!atomic_read(&bat_priv->distributed_arp_table)))
301 goto nla_put_failure;
302 #endif /* CONFIG_BATMAN_ADV_DAT */
303
304 if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED,
305 !!atomic_read(&bat_priv->fragmentation)))
306 goto nla_put_failure;
307
308 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_DOWN,
309 atomic_read(&bat_priv->gw.bandwidth_down)))
310 goto nla_put_failure;
311
312 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_UP,
313 atomic_read(&bat_priv->gw.bandwidth_up)))
314 goto nla_put_failure;
315
316 if (nla_put_u8(msg, BATADV_ATTR_GW_MODE,
317 atomic_read(&bat_priv->gw.mode)))
318 goto nla_put_failure;
319
320 if (bat_priv->algo_ops->gw.get_best_gw_node &&
321 bat_priv->algo_ops->gw.is_eligible) {
322 /* GW selection class is not available if the routing algorithm
323 * in use does not implement the GW API
324 */
325 if (nla_put_u32(msg, BATADV_ATTR_GW_SEL_CLASS,
326 atomic_read(&bat_priv->gw.sel_class)))
327 goto nla_put_failure;
328 }
329
330 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
331 atomic_read(&bat_priv->hop_penalty)))
332 goto nla_put_failure;
333
334 #ifdef CONFIG_BATMAN_ADV_DEBUG
335 if (nla_put_u32(msg, BATADV_ATTR_LOG_LEVEL,
336 atomic_read(&bat_priv->log_level)))
337 goto nla_put_failure;
338 #endif /* CONFIG_BATMAN_ADV_DEBUG */
339
340 #ifdef CONFIG_BATMAN_ADV_MCAST
341 if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
342 !atomic_read(&bat_priv->multicast_mode)))
343 goto nla_put_failure;
344
345 if (nla_put_u32(msg, BATADV_ATTR_MULTICAST_FANOUT,
346 atomic_read(&bat_priv->multicast_fanout)))
347 goto nla_put_failure;
348 #endif /* CONFIG_BATMAN_ADV_MCAST */
349
350 #ifdef CONFIG_BATMAN_ADV_NC
351 if (nla_put_u8(msg, BATADV_ATTR_NETWORK_CODING_ENABLED,
352 !!atomic_read(&bat_priv->network_coding)))
353 goto nla_put_failure;
354 #endif /* CONFIG_BATMAN_ADV_NC */
355
356 if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL,
357 atomic_read(&bat_priv->orig_interval)))
358 goto nla_put_failure;
359
360 batadv_hardif_put(primary_if);
361
362 genlmsg_end(msg, hdr);
363 return 0;
364
365 nla_put_failure:
366 batadv_hardif_put(primary_if);
367
368 genlmsg_cancel(msg, hdr);
369 return -EMSGSIZE;
370 }
371
372 /**
373 * batadv_netlink_notify_mesh() - send softif attributes to listener
374 * @bat_priv: the bat priv with all the soft interface information
375 *
376 * Return: 0 on success, < 0 on error
377 */
batadv_netlink_notify_mesh(struct batadv_priv * bat_priv)378 static int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
379 {
380 struct sk_buff *msg;
381 int ret;
382
383 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
384 if (!msg)
385 return -ENOMEM;
386
387 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH,
388 0, 0, 0);
389 if (ret < 0) {
390 nlmsg_free(msg);
391 return ret;
392 }
393
394 genlmsg_multicast_netns(&batadv_netlink_family,
395 dev_net(bat_priv->soft_iface), msg, 0,
396 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
397
398 return 0;
399 }
400
401 /**
402 * batadv_netlink_get_mesh() - Get softif attributes
403 * @skb: Netlink message with request data
404 * @info: receiver information
405 *
406 * Return: 0 on success or negative error number in case of failure
407 */
batadv_netlink_get_mesh(struct sk_buff * skb,struct genl_info * info)408 static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info)
409 {
410 struct batadv_priv *bat_priv = info->user_ptr[0];
411 struct sk_buff *msg;
412 int ret;
413
414 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
415 if (!msg)
416 return -ENOMEM;
417
418 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH,
419 info->snd_portid, info->snd_seq, 0);
420 if (ret < 0) {
421 nlmsg_free(msg);
422 return ret;
423 }
424
425 ret = genlmsg_reply(msg, info);
426
427 return ret;
428 }
429
430 /**
431 * batadv_netlink_set_mesh() - Set softif attributes
432 * @skb: Netlink message with request data
433 * @info: receiver information
434 *
435 * Return: 0 on success or negative error number in case of failure
436 */
batadv_netlink_set_mesh(struct sk_buff * skb,struct genl_info * info)437 static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
438 {
439 struct batadv_priv *bat_priv = info->user_ptr[0];
440 struct nlattr *attr;
441
442 if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) {
443 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED];
444
445 atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr));
446 }
447
448 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
449 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
450
451 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv);
452 }
453
454 if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) {
455 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK];
456
457 bat_priv->isolation_mark = nla_get_u32(attr);
458 }
459
460 if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) {
461 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK];
462
463 bat_priv->isolation_mark_mask = nla_get_u32(attr);
464 }
465
466 if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) {
467 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED];
468
469 atomic_set(&bat_priv->bonding, !!nla_get_u8(attr));
470 }
471
472 #ifdef CONFIG_BATMAN_ADV_BLA
473 if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) {
474 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED];
475
476 atomic_set(&bat_priv->bridge_loop_avoidance,
477 !!nla_get_u8(attr));
478 batadv_bla_status_update(bat_priv->soft_iface);
479 }
480 #endif /* CONFIG_BATMAN_ADV_BLA */
481
482 #ifdef CONFIG_BATMAN_ADV_DAT
483 if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
484 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
485
486 atomic_set(&bat_priv->distributed_arp_table,
487 !!nla_get_u8(attr));
488 batadv_dat_status_update(bat_priv->soft_iface);
489 }
490 #endif /* CONFIG_BATMAN_ADV_DAT */
491
492 if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
493 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
494
495 atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr));
496
497 rtnl_lock();
498 batadv_update_min_mtu(bat_priv->soft_iface);
499 rtnl_unlock();
500 }
501
502 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {
503 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN];
504
505 atomic_set(&bat_priv->gw.bandwidth_down, nla_get_u32(attr));
506 batadv_gw_tvlv_container_update(bat_priv);
507 }
508
509 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) {
510 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP];
511
512 atomic_set(&bat_priv->gw.bandwidth_up, nla_get_u32(attr));
513 batadv_gw_tvlv_container_update(bat_priv);
514 }
515
516 if (info->attrs[BATADV_ATTR_GW_MODE]) {
517 u8 gw_mode;
518
519 attr = info->attrs[BATADV_ATTR_GW_MODE];
520 gw_mode = nla_get_u8(attr);
521
522 if (gw_mode <= BATADV_GW_MODE_SERVER) {
523 /* Invoking batadv_gw_reselect() is not enough to really
524 * de-select the current GW. It will only instruct the
525 * gateway client code to perform a re-election the next
526 * time that this is needed.
527 *
528 * When gw client mode is being switched off the current
529 * GW must be de-selected explicitly otherwise no GW_ADD
530 * uevent is thrown on client mode re-activation. This
531 * is operation is performed in
532 * batadv_gw_check_client_stop().
533 */
534 batadv_gw_reselect(bat_priv);
535
536 /* always call batadv_gw_check_client_stop() before
537 * changing the gateway state
538 */
539 batadv_gw_check_client_stop(bat_priv);
540 atomic_set(&bat_priv->gw.mode, gw_mode);
541 batadv_gw_tvlv_container_update(bat_priv);
542 }
543 }
544
545 if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] &&
546 bat_priv->algo_ops->gw.get_best_gw_node &&
547 bat_priv->algo_ops->gw.is_eligible) {
548 /* setting the GW selection class is allowed only if the routing
549 * algorithm in use implements the GW API
550 */
551
552 u32 sel_class_max = bat_priv->algo_ops->gw.sel_class_max;
553 u32 sel_class;
554
555 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
556 sel_class = nla_get_u32(attr);
557
558 if (sel_class >= 1 && sel_class <= sel_class_max) {
559 atomic_set(&bat_priv->gw.sel_class, sel_class);
560 batadv_gw_reselect(bat_priv);
561 }
562 }
563
564 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
565 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
566
567 atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr));
568 }
569
570 #ifdef CONFIG_BATMAN_ADV_DEBUG
571 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) {
572 attr = info->attrs[BATADV_ATTR_LOG_LEVEL];
573
574 atomic_set(&bat_priv->log_level,
575 nla_get_u32(attr) & BATADV_DBG_ALL);
576 }
577 #endif /* CONFIG_BATMAN_ADV_DEBUG */
578
579 #ifdef CONFIG_BATMAN_ADV_MCAST
580 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) {
581 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
582
583 atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr));
584 }
585
586 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) {
587 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT];
588
589 atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr));
590 }
591 #endif /* CONFIG_BATMAN_ADV_MCAST */
592
593 #ifdef CONFIG_BATMAN_ADV_NC
594 if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) {
595 attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED];
596
597 atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr));
598 batadv_nc_status_update(bat_priv->soft_iface);
599 }
600 #endif /* CONFIG_BATMAN_ADV_NC */
601
602 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
603 u32 orig_interval;
604
605 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
606 orig_interval = nla_get_u32(attr);
607
608 orig_interval = min_t(u32, orig_interval, INT_MAX);
609 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
610
611 atomic_set(&bat_priv->orig_interval, orig_interval);
612 }
613
614 batadv_netlink_notify_mesh(bat_priv);
615
616 return 0;
617 }
618
619 /**
620 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
621 * @msg: netlink message to be sent back
622 * @cookie: tp meter session cookie
623 *
624 * Return: 0 on success, < 0 on error
625 */
626 static int
batadv_netlink_tp_meter_put(struct sk_buff * msg,u32 cookie)627 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
628 {
629 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
630 return -ENOBUFS;
631
632 return 0;
633 }
634
635 /**
636 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
637 * @bat_priv: the bat priv with all the soft interface information
638 * @dst: destination of tp_meter session
639 * @result: reason for tp meter session stop
640 * @test_time: total time of the tp_meter session
641 * @total_bytes: bytes acked to the receiver
642 * @cookie: cookie of tp_meter session
643 *
644 * Return: 0 on success, < 0 on error
645 */
batadv_netlink_tpmeter_notify(struct batadv_priv * bat_priv,const u8 * dst,u8 result,u32 test_time,u64 total_bytes,u32 cookie)646 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
647 u8 result, u32 test_time, u64 total_bytes,
648 u32 cookie)
649 {
650 struct sk_buff *msg;
651 void *hdr;
652 int ret;
653
654 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
655 if (!msg)
656 return -ENOMEM;
657
658 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
659 BATADV_CMD_TP_METER);
660 if (!hdr) {
661 ret = -ENOBUFS;
662 goto err_genlmsg;
663 }
664
665 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
666 goto nla_put_failure;
667
668 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
669 goto nla_put_failure;
670
671 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
672 BATADV_ATTR_PAD))
673 goto nla_put_failure;
674
675 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
676 goto nla_put_failure;
677
678 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
679 goto nla_put_failure;
680
681 genlmsg_end(msg, hdr);
682
683 genlmsg_multicast_netns(&batadv_netlink_family,
684 dev_net(bat_priv->soft_iface), msg, 0,
685 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
686
687 return 0;
688
689 nla_put_failure:
690 genlmsg_cancel(msg, hdr);
691 ret = -EMSGSIZE;
692
693 err_genlmsg:
694 nlmsg_free(msg);
695 return ret;
696 }
697
698 /**
699 * batadv_netlink_tp_meter_start() - Start a new tp_meter session
700 * @skb: received netlink message
701 * @info: receiver information
702 *
703 * Return: 0 on success, < 0 on error
704 */
705 static int
batadv_netlink_tp_meter_start(struct sk_buff * skb,struct genl_info * info)706 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
707 {
708 struct batadv_priv *bat_priv = info->user_ptr[0];
709 struct sk_buff *msg = NULL;
710 u32 test_length;
711 void *msg_head;
712 u32 cookie;
713 u8 *dst;
714 int ret;
715
716 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
717 return -EINVAL;
718
719 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
720 return -EINVAL;
721
722 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
723
724 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
725
726 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
727 if (!msg) {
728 ret = -ENOMEM;
729 goto out;
730 }
731
732 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
733 &batadv_netlink_family, 0,
734 BATADV_CMD_TP_METER);
735 if (!msg_head) {
736 ret = -ENOBUFS;
737 goto out;
738 }
739
740 batadv_tp_start(bat_priv, dst, test_length, &cookie);
741
742 ret = batadv_netlink_tp_meter_put(msg, cookie);
743
744 out:
745 if (ret) {
746 if (msg)
747 nlmsg_free(msg);
748 return ret;
749 }
750
751 genlmsg_end(msg, msg_head);
752 return genlmsg_reply(msg, info);
753 }
754
755 /**
756 * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session
757 * @skb: received netlink message
758 * @info: receiver information
759 *
760 * Return: 0 on success, < 0 on error
761 */
762 static int
batadv_netlink_tp_meter_cancel(struct sk_buff * skb,struct genl_info * info)763 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
764 {
765 struct batadv_priv *bat_priv = info->user_ptr[0];
766 u8 *dst;
767 int ret = 0;
768
769 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
770 return -EINVAL;
771
772 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
773
774 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
775
776 return ret;
777 }
778
779 /**
780 * batadv_netlink_hardif_fill() - Fill message with hardif attributes
781 * @msg: Netlink message to dump into
782 * @bat_priv: the bat priv with all the soft interface information
783 * @hard_iface: hard interface which was modified
784 * @cmd: type of message to generate
785 * @portid: Port making netlink request
786 * @seq: sequence number for message
787 * @flags: Additional flags for message
788 * @cb: Control block containing additional options
789 *
790 * Return: 0 on success or negative error number in case of failure
791 */
batadv_netlink_hardif_fill(struct sk_buff * msg,struct batadv_priv * bat_priv,struct batadv_hard_iface * hard_iface,enum batadv_nl_commands cmd,u32 portid,u32 seq,int flags,struct netlink_callback * cb)792 static int batadv_netlink_hardif_fill(struct sk_buff *msg,
793 struct batadv_priv *bat_priv,
794 struct batadv_hard_iface *hard_iface,
795 enum batadv_nl_commands cmd,
796 u32 portid, u32 seq, int flags,
797 struct netlink_callback *cb)
798 {
799 struct net_device *net_dev = hard_iface->net_dev;
800 void *hdr;
801
802 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
803 if (!hdr)
804 return -ENOBUFS;
805
806 if (cb)
807 genl_dump_check_consistent(cb, hdr);
808
809 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
810 bat_priv->soft_iface->ifindex))
811 goto nla_put_failure;
812
813 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME,
814 bat_priv->soft_iface->name))
815 goto nla_put_failure;
816
817 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
818 net_dev->ifindex) ||
819 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
820 net_dev->name) ||
821 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
822 net_dev->dev_addr))
823 goto nla_put_failure;
824
825 if (hard_iface->if_status == BATADV_IF_ACTIVE) {
826 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
827 goto nla_put_failure;
828 }
829
830 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
831 atomic_read(&hard_iface->hop_penalty)))
832 goto nla_put_failure;
833
834 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
835 if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL,
836 atomic_read(&hard_iface->bat_v.elp_interval)))
837 goto nla_put_failure;
838
839 if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE,
840 atomic_read(&hard_iface->bat_v.throughput_override)))
841 goto nla_put_failure;
842 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
843
844 genlmsg_end(msg, hdr);
845 return 0;
846
847 nla_put_failure:
848 genlmsg_cancel(msg, hdr);
849 return -EMSGSIZE;
850 }
851
852 /**
853 * batadv_netlink_notify_hardif() - send hardif attributes to listener
854 * @bat_priv: the bat priv with all the soft interface information
855 * @hard_iface: hard interface which was modified
856 *
857 * Return: 0 on success, < 0 on error
858 */
batadv_netlink_notify_hardif(struct batadv_priv * bat_priv,struct batadv_hard_iface * hard_iface)859 static int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
860 struct batadv_hard_iface *hard_iface)
861 {
862 struct sk_buff *msg;
863 int ret;
864
865 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
866 if (!msg)
867 return -ENOMEM;
868
869 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
870 BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL);
871 if (ret < 0) {
872 nlmsg_free(msg);
873 return ret;
874 }
875
876 genlmsg_multicast_netns(&batadv_netlink_family,
877 dev_net(bat_priv->soft_iface), msg, 0,
878 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
879
880 return 0;
881 }
882
883 /**
884 * batadv_netlink_get_hardif() - Get hardif attributes
885 * @skb: Netlink message with request data
886 * @info: receiver information
887 *
888 * Return: 0 on success or negative error number in case of failure
889 */
batadv_netlink_get_hardif(struct sk_buff * skb,struct genl_info * info)890 static int batadv_netlink_get_hardif(struct sk_buff *skb,
891 struct genl_info *info)
892 {
893 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
894 struct batadv_priv *bat_priv = info->user_ptr[0];
895 struct sk_buff *msg;
896 int ret;
897
898 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
899 if (!msg)
900 return -ENOMEM;
901
902 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
903 BATADV_CMD_GET_HARDIF,
904 info->snd_portid, info->snd_seq, 0,
905 NULL);
906 if (ret < 0) {
907 nlmsg_free(msg);
908 return ret;
909 }
910
911 ret = genlmsg_reply(msg, info);
912
913 return ret;
914 }
915
916 /**
917 * batadv_netlink_set_hardif() - Set hardif attributes
918 * @skb: Netlink message with request data
919 * @info: receiver information
920 *
921 * Return: 0 on success or negative error number in case of failure
922 */
batadv_netlink_set_hardif(struct sk_buff * skb,struct genl_info * info)923 static int batadv_netlink_set_hardif(struct sk_buff *skb,
924 struct genl_info *info)
925 {
926 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
927 struct batadv_priv *bat_priv = info->user_ptr[0];
928 struct nlattr *attr;
929
930 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
931 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
932
933 atomic_set(&hard_iface->hop_penalty, nla_get_u8(attr));
934 }
935
936 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
937
938 if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) {
939 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL];
940
941 atomic_set(&hard_iface->bat_v.elp_interval, nla_get_u32(attr));
942 }
943
944 if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) {
945 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE];
946
947 atomic_set(&hard_iface->bat_v.throughput_override,
948 nla_get_u32(attr));
949 }
950 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
951
952 batadv_netlink_notify_hardif(bat_priv, hard_iface);
953
954 return 0;
955 }
956
957 /**
958 * batadv_netlink_dump_hardif() - Dump all hard interface into a messages
959 * @msg: Netlink message to dump into
960 * @cb: Parameters from query
961 *
962 * Return: error code, or length of reply message on success
963 */
964 static int
batadv_netlink_dump_hardif(struct sk_buff * msg,struct netlink_callback * cb)965 batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb)
966 {
967 struct net *net = sock_net(cb->skb->sk);
968 struct net_device *soft_iface;
969 struct batadv_hard_iface *hard_iface;
970 struct batadv_priv *bat_priv;
971 int ifindex;
972 int portid = NETLINK_CB(cb->skb).portid;
973 int skip = cb->args[0];
974 int i = 0;
975
976 ifindex = batadv_netlink_get_ifindex(cb->nlh,
977 BATADV_ATTR_MESH_IFINDEX);
978 if (!ifindex)
979 return -EINVAL;
980
981 soft_iface = dev_get_by_index(net, ifindex);
982 if (!soft_iface)
983 return -ENODEV;
984
985 if (!batadv_softif_is_valid(soft_iface)) {
986 dev_put(soft_iface);
987 return -ENODEV;
988 }
989
990 bat_priv = netdev_priv(soft_iface);
991
992 rtnl_lock();
993 cb->seq = batadv_hardif_generation << 1 | 1;
994
995 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
996 if (hard_iface->soft_iface != soft_iface)
997 continue;
998
999 if (i++ < skip)
1000 continue;
1001
1002 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
1003 BATADV_CMD_GET_HARDIF,
1004 portid, cb->nlh->nlmsg_seq,
1005 NLM_F_MULTI, cb)) {
1006 i--;
1007 break;
1008 }
1009 }
1010
1011 rtnl_unlock();
1012
1013 dev_put(soft_iface);
1014
1015 cb->args[0] = i;
1016
1017 return msg->len;
1018 }
1019
1020 /**
1021 * batadv_netlink_vlan_fill() - Fill message with vlan attributes
1022 * @msg: Netlink message to dump into
1023 * @bat_priv: the bat priv with all the soft interface information
1024 * @vlan: vlan which was modified
1025 * @cmd: type of message to generate
1026 * @portid: Port making netlink request
1027 * @seq: sequence number for message
1028 * @flags: Additional flags for message
1029 *
1030 * Return: 0 on success or negative error number in case of failure
1031 */
batadv_netlink_vlan_fill(struct sk_buff * msg,struct batadv_priv * bat_priv,struct batadv_softif_vlan * vlan,enum batadv_nl_commands cmd,u32 portid,u32 seq,int flags)1032 static int batadv_netlink_vlan_fill(struct sk_buff *msg,
1033 struct batadv_priv *bat_priv,
1034 struct batadv_softif_vlan *vlan,
1035 enum batadv_nl_commands cmd,
1036 u32 portid, u32 seq, int flags)
1037 {
1038 void *hdr;
1039
1040 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
1041 if (!hdr)
1042 return -ENOBUFS;
1043
1044 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
1045 bat_priv->soft_iface->ifindex))
1046 goto nla_put_failure;
1047
1048 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME,
1049 bat_priv->soft_iface->name))
1050 goto nla_put_failure;
1051
1052 if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK))
1053 goto nla_put_failure;
1054
1055 if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
1056 !!atomic_read(&vlan->ap_isolation)))
1057 goto nla_put_failure;
1058
1059 genlmsg_end(msg, hdr);
1060 return 0;
1061
1062 nla_put_failure:
1063 genlmsg_cancel(msg, hdr);
1064 return -EMSGSIZE;
1065 }
1066
1067 /**
1068 * batadv_netlink_notify_vlan() - send vlan attributes to listener
1069 * @bat_priv: the bat priv with all the soft interface information
1070 * @vlan: vlan which was modified
1071 *
1072 * Return: 0 on success, < 0 on error
1073 */
batadv_netlink_notify_vlan(struct batadv_priv * bat_priv,struct batadv_softif_vlan * vlan)1074 static int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
1075 struct batadv_softif_vlan *vlan)
1076 {
1077 struct sk_buff *msg;
1078 int ret;
1079
1080 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1081 if (!msg)
1082 return -ENOMEM;
1083
1084 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan,
1085 BATADV_CMD_SET_VLAN, 0, 0, 0);
1086 if (ret < 0) {
1087 nlmsg_free(msg);
1088 return ret;
1089 }
1090
1091 genlmsg_multicast_netns(&batadv_netlink_family,
1092 dev_net(bat_priv->soft_iface), msg, 0,
1093 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
1094
1095 return 0;
1096 }
1097
1098 /**
1099 * batadv_netlink_get_vlan() - Get vlan attributes
1100 * @skb: Netlink message with request data
1101 * @info: receiver information
1102 *
1103 * Return: 0 on success or negative error number in case of failure
1104 */
batadv_netlink_get_vlan(struct sk_buff * skb,struct genl_info * info)1105 static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info)
1106 {
1107 struct batadv_softif_vlan *vlan = info->user_ptr[1];
1108 struct batadv_priv *bat_priv = info->user_ptr[0];
1109 struct sk_buff *msg;
1110 int ret;
1111
1112 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1113 if (!msg)
1114 return -ENOMEM;
1115
1116 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN,
1117 info->snd_portid, info->snd_seq, 0);
1118 if (ret < 0) {
1119 nlmsg_free(msg);
1120 return ret;
1121 }
1122
1123 ret = genlmsg_reply(msg, info);
1124
1125 return ret;
1126 }
1127
1128 /**
1129 * batadv_netlink_set_vlan() - Get vlan attributes
1130 * @skb: Netlink message with request data
1131 * @info: receiver information
1132 *
1133 * Return: 0 on success or negative error number in case of failure
1134 */
batadv_netlink_set_vlan(struct sk_buff * skb,struct genl_info * info)1135 static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info)
1136 {
1137 struct batadv_softif_vlan *vlan = info->user_ptr[1];
1138 struct batadv_priv *bat_priv = info->user_ptr[0];
1139 struct nlattr *attr;
1140
1141 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
1142 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
1143
1144 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
1145 }
1146
1147 batadv_netlink_notify_vlan(bat_priv, vlan);
1148
1149 return 0;
1150 }
1151
1152 /**
1153 * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes
1154 * @net: the applicable net namespace
1155 * @info: receiver information
1156 *
1157 * Return: Pointer to soft interface (with increased refcnt) on success, error
1158 * pointer on error
1159 */
1160 static struct net_device *
batadv_get_softif_from_info(struct net * net,struct genl_info * info)1161 batadv_get_softif_from_info(struct net *net, struct genl_info *info)
1162 {
1163 struct net_device *soft_iface;
1164 int ifindex;
1165
1166 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
1167 return ERR_PTR(-EINVAL);
1168
1169 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
1170
1171 soft_iface = dev_get_by_index(net, ifindex);
1172 if (!soft_iface)
1173 return ERR_PTR(-ENODEV);
1174
1175 if (!batadv_softif_is_valid(soft_iface))
1176 goto err_put_softif;
1177
1178 return soft_iface;
1179
1180 err_put_softif:
1181 dev_put(soft_iface);
1182
1183 return ERR_PTR(-EINVAL);
1184 }
1185
1186 /**
1187 * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes
1188 * @bat_priv: the bat priv with all the soft interface information
1189 * @net: the applicable net namespace
1190 * @info: receiver information
1191 *
1192 * Return: Pointer to hard interface (with increased refcnt) on success, error
1193 * pointer on error
1194 */
1195 static struct batadv_hard_iface *
batadv_get_hardif_from_info(struct batadv_priv * bat_priv,struct net * net,struct genl_info * info)1196 batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net,
1197 struct genl_info *info)
1198 {
1199 struct batadv_hard_iface *hard_iface;
1200 struct net_device *hard_dev;
1201 unsigned int hardif_index;
1202
1203 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX])
1204 return ERR_PTR(-EINVAL);
1205
1206 hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]);
1207
1208 hard_dev = dev_get_by_index(net, hardif_index);
1209 if (!hard_dev)
1210 return ERR_PTR(-ENODEV);
1211
1212 hard_iface = batadv_hardif_get_by_netdev(hard_dev);
1213 if (!hard_iface)
1214 goto err_put_harddev;
1215
1216 if (hard_iface->soft_iface != bat_priv->soft_iface)
1217 goto err_put_hardif;
1218
1219 /* hard_dev is referenced by hard_iface and not needed here */
1220 dev_put(hard_dev);
1221
1222 return hard_iface;
1223
1224 err_put_hardif:
1225 batadv_hardif_put(hard_iface);
1226 err_put_harddev:
1227 dev_put(hard_dev);
1228
1229 return ERR_PTR(-EINVAL);
1230 }
1231
1232 /**
1233 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes
1234 * @bat_priv: the bat priv with all the soft interface information
1235 * @net: the applicable net namespace
1236 * @info: receiver information
1237 *
1238 * Return: Pointer to vlan on success (with increased refcnt), error pointer
1239 * on error
1240 */
1241 static struct batadv_softif_vlan *
batadv_get_vlan_from_info(struct batadv_priv * bat_priv,struct net * net,struct genl_info * info)1242 batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net,
1243 struct genl_info *info)
1244 {
1245 struct batadv_softif_vlan *vlan;
1246 u16 vid;
1247
1248 if (!info->attrs[BATADV_ATTR_VLANID])
1249 return ERR_PTR(-EINVAL);
1250
1251 vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]);
1252
1253 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
1254 if (!vlan)
1255 return ERR_PTR(-ENOENT);
1256
1257 return vlan;
1258 }
1259
1260 /**
1261 * batadv_pre_doit() - Prepare batman-adv genl doit request
1262 * @ops: requested netlink operation
1263 * @skb: Netlink message with request data
1264 * @info: receiver information
1265 *
1266 * Return: 0 on success or negative error number in case of failure
1267 */
batadv_pre_doit(const struct genl_split_ops * ops,struct sk_buff * skb,struct genl_info * info)1268 static int batadv_pre_doit(const struct genl_split_ops *ops,
1269 struct sk_buff *skb,
1270 struct genl_info *info)
1271 {
1272 struct net *net = genl_info_net(info);
1273 struct batadv_hard_iface *hard_iface;
1274 struct batadv_priv *bat_priv = NULL;
1275 struct batadv_softif_vlan *vlan;
1276 struct net_device *soft_iface;
1277 u8 user_ptr1_flags;
1278 u8 mesh_dep_flags;
1279 int ret;
1280
1281 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1282 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1))
1283 return -EINVAL;
1284
1285 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1286 if (WARN_ON((ops->internal_flags & mesh_dep_flags) &&
1287 (~ops->internal_flags & BATADV_FLAG_NEED_MESH)))
1288 return -EINVAL;
1289
1290 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) {
1291 soft_iface = batadv_get_softif_from_info(net, info);
1292 if (IS_ERR(soft_iface))
1293 return PTR_ERR(soft_iface);
1294
1295 bat_priv = netdev_priv(soft_iface);
1296 info->user_ptr[0] = bat_priv;
1297 }
1298
1299 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) {
1300 hard_iface = batadv_get_hardif_from_info(bat_priv, net, info);
1301 if (IS_ERR(hard_iface)) {
1302 ret = PTR_ERR(hard_iface);
1303 goto err_put_softif;
1304 }
1305
1306 info->user_ptr[1] = hard_iface;
1307 }
1308
1309 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) {
1310 vlan = batadv_get_vlan_from_info(bat_priv, net, info);
1311 if (IS_ERR(vlan)) {
1312 ret = PTR_ERR(vlan);
1313 goto err_put_softif;
1314 }
1315
1316 info->user_ptr[1] = vlan;
1317 }
1318
1319 return 0;
1320
1321 err_put_softif:
1322 if (bat_priv)
1323 dev_put(bat_priv->soft_iface);
1324
1325 return ret;
1326 }
1327
1328 /**
1329 * batadv_post_doit() - End batman-adv genl doit request
1330 * @ops: requested netlink operation
1331 * @skb: Netlink message with request data
1332 * @info: receiver information
1333 */
batadv_post_doit(const struct genl_split_ops * ops,struct sk_buff * skb,struct genl_info * info)1334 static void batadv_post_doit(const struct genl_split_ops *ops,
1335 struct sk_buff *skb,
1336 struct genl_info *info)
1337 {
1338 struct batadv_hard_iface *hard_iface;
1339 struct batadv_softif_vlan *vlan;
1340 struct batadv_priv *bat_priv;
1341
1342 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF &&
1343 info->user_ptr[1]) {
1344 hard_iface = info->user_ptr[1];
1345
1346 batadv_hardif_put(hard_iface);
1347 }
1348
1349 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) {
1350 vlan = info->user_ptr[1];
1351 batadv_softif_vlan_put(vlan);
1352 }
1353
1354 if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) {
1355 bat_priv = info->user_ptr[0];
1356 dev_put(bat_priv->soft_iface);
1357 }
1358 }
1359
1360 static const struct genl_small_ops batadv_netlink_ops[] = {
1361 {
1362 .cmd = BATADV_CMD_GET_MESH,
1363 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1364 /* can be retrieved by unprivileged users */
1365 .doit = batadv_netlink_get_mesh,
1366 .internal_flags = BATADV_FLAG_NEED_MESH,
1367 },
1368 {
1369 .cmd = BATADV_CMD_TP_METER,
1370 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1371 .flags = GENL_UNS_ADMIN_PERM,
1372 .doit = batadv_netlink_tp_meter_start,
1373 .internal_flags = BATADV_FLAG_NEED_MESH,
1374 },
1375 {
1376 .cmd = BATADV_CMD_TP_METER_CANCEL,
1377 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1378 .flags = GENL_UNS_ADMIN_PERM,
1379 .doit = batadv_netlink_tp_meter_cancel,
1380 .internal_flags = BATADV_FLAG_NEED_MESH,
1381 },
1382 {
1383 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
1384 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1385 .flags = GENL_UNS_ADMIN_PERM,
1386 .dumpit = batadv_algo_dump,
1387 },
1388 {
1389 .cmd = BATADV_CMD_GET_HARDIF,
1390 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1391 /* can be retrieved by unprivileged users */
1392 .dumpit = batadv_netlink_dump_hardif,
1393 .doit = batadv_netlink_get_hardif,
1394 .internal_flags = BATADV_FLAG_NEED_MESH |
1395 BATADV_FLAG_NEED_HARDIF,
1396 },
1397 {
1398 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
1399 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1400 .flags = GENL_UNS_ADMIN_PERM,
1401 .dumpit = batadv_tt_local_dump,
1402 },
1403 {
1404 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
1405 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1406 .flags = GENL_UNS_ADMIN_PERM,
1407 .dumpit = batadv_tt_global_dump,
1408 },
1409 {
1410 .cmd = BATADV_CMD_GET_ORIGINATORS,
1411 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1412 .flags = GENL_UNS_ADMIN_PERM,
1413 .dumpit = batadv_orig_dump,
1414 },
1415 {
1416 .cmd = BATADV_CMD_GET_NEIGHBORS,
1417 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1418 .flags = GENL_UNS_ADMIN_PERM,
1419 .dumpit = batadv_hardif_neigh_dump,
1420 },
1421 {
1422 .cmd = BATADV_CMD_GET_GATEWAYS,
1423 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1424 .flags = GENL_UNS_ADMIN_PERM,
1425 .dumpit = batadv_gw_dump,
1426 },
1427 {
1428 .cmd = BATADV_CMD_GET_BLA_CLAIM,
1429 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1430 .flags = GENL_UNS_ADMIN_PERM,
1431 .dumpit = batadv_bla_claim_dump,
1432 },
1433 {
1434 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
1435 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1436 .flags = GENL_UNS_ADMIN_PERM,
1437 .dumpit = batadv_bla_backbone_dump,
1438 },
1439 {
1440 .cmd = BATADV_CMD_GET_DAT_CACHE,
1441 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1442 .flags = GENL_UNS_ADMIN_PERM,
1443 .dumpit = batadv_dat_cache_dump,
1444 },
1445 {
1446 .cmd = BATADV_CMD_GET_MCAST_FLAGS,
1447 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1448 .flags = GENL_UNS_ADMIN_PERM,
1449 .dumpit = batadv_mcast_flags_dump,
1450 },
1451 {
1452 .cmd = BATADV_CMD_SET_MESH,
1453 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1454 .flags = GENL_UNS_ADMIN_PERM,
1455 .doit = batadv_netlink_set_mesh,
1456 .internal_flags = BATADV_FLAG_NEED_MESH,
1457 },
1458 {
1459 .cmd = BATADV_CMD_SET_HARDIF,
1460 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1461 .flags = GENL_UNS_ADMIN_PERM,
1462 .doit = batadv_netlink_set_hardif,
1463 .internal_flags = BATADV_FLAG_NEED_MESH |
1464 BATADV_FLAG_NEED_HARDIF,
1465 },
1466 {
1467 .cmd = BATADV_CMD_GET_VLAN,
1468 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1469 /* can be retrieved by unprivileged users */
1470 .doit = batadv_netlink_get_vlan,
1471 .internal_flags = BATADV_FLAG_NEED_MESH |
1472 BATADV_FLAG_NEED_VLAN,
1473 },
1474 {
1475 .cmd = BATADV_CMD_SET_VLAN,
1476 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1477 .flags = GENL_UNS_ADMIN_PERM,
1478 .doit = batadv_netlink_set_vlan,
1479 .internal_flags = BATADV_FLAG_NEED_MESH |
1480 BATADV_FLAG_NEED_VLAN,
1481 },
1482 };
1483
1484 struct genl_family batadv_netlink_family __ro_after_init = {
1485 .hdrsize = 0,
1486 .name = BATADV_NL_NAME,
1487 .version = 1,
1488 .maxattr = BATADV_ATTR_MAX,
1489 .policy = batadv_netlink_policy,
1490 .netnsok = true,
1491 .pre_doit = batadv_pre_doit,
1492 .post_doit = batadv_post_doit,
1493 .module = THIS_MODULE,
1494 .small_ops = batadv_netlink_ops,
1495 .n_small_ops = ARRAY_SIZE(batadv_netlink_ops),
1496 .resv_start_op = BATADV_CMD_SET_VLAN + 1,
1497 .mcgrps = batadv_netlink_mcgrps,
1498 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
1499 };
1500
1501 /**
1502 * batadv_netlink_register() - register batadv genl netlink family
1503 */
batadv_netlink_register(void)1504 void __init batadv_netlink_register(void)
1505 {
1506 int ret;
1507
1508 ret = genl_register_family(&batadv_netlink_family);
1509 if (ret)
1510 pr_warn("unable to register netlink family");
1511 }
1512
1513 /**
1514 * batadv_netlink_unregister() - unregister batadv genl netlink family
1515 */
batadv_netlink_unregister(void)1516 void batadv_netlink_unregister(void)
1517 {
1518 genl_unregister_family(&batadv_netlink_family);
1519 }
1520