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/compiler.h>
17 #include <linux/err.h>
18 #include <linux/errno.h>
19 #include <linux/gfp.h>
20 #include <linux/if_ether.h>
21 #include <linux/if_vlan.h>
22 #include <linux/init.h>
23 #include <linux/limits.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 <linux/utsname.h>
33 #include <net/genetlink.h>
34 #include <net/net_namespace.h>
35 #include <net/netlink.h>
36 #include <net/sock.h>
37 #include <uapi/linux/batadv_packet.h>
38 #include <uapi/linux/batman_adv.h>
39
40 #include "bat_algo.h"
41 #include "bridge_loop_avoidance.h"
42 #include "distributed-arp-table.h"
43 #include "gateway_client.h"
44 #include "gateway_common.h"
45 #include "hard-interface.h"
46 #include "log.h"
47 #include "mesh-interface.h"
48 #include "multicast.h"
49 #include "originator.h"
50 #include "tp_meter.h"
51 #include "translation-table.h"
52
53 struct genl_family batadv_netlink_family;
54
55 /**
56 * enum batadv_netlink_multicast_groups - batman-adv generic netlink multicast
57 * groups
58 */
59 enum batadv_netlink_multicast_groups {
60 /** @BATADV_NL_MCGRP_CONFIG: configuration change notifications */
61 BATADV_NL_MCGRP_CONFIG,
62
63 /** @BATADV_NL_MCGRP_TPMETER: throughput meter result notifications */
64 BATADV_NL_MCGRP_TPMETER,
65 };
66
67 /**
68 * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags
69 */
70 enum batadv_genl_ops_flags {
71 /**
72 * @BATADV_FLAG_NEED_MESH: request requires valid mesh interface in
73 * attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be
74 * saved in info->user_ptr[0]
75 */
76 BATADV_FLAG_NEED_MESH = BIT(0),
77
78 /**
79 * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in
80 * attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be
81 * saved in info->user_ptr[1]
82 */
83 BATADV_FLAG_NEED_HARDIF = BIT(1),
84
85 /**
86 * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in
87 * attribute BATADV_ATTR_VLANID and expects a pointer to it to be
88 * saved in info->user_ptr[1]
89 */
90 BATADV_FLAG_NEED_VLAN = BIT(2),
91 };
92
93 static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
94 [BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG },
95 [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
96 };
97
98 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
99 [BATADV_ATTR_VERSION] = { .type = NLA_STRING },
100 [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
101 [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
102 [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
103 [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
104 [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
105 [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
106 [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
107 [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
108 [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
109 [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
110 [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
111 [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
112 [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
113 [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
114 [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
115 [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
116 [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
117 [BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
118 [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
119 [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
120 [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
121 [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
122 [BATADV_ATTR_TQ] = { .type = NLA_U8 },
123 [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
124 [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
125 [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
126 [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
127 [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
128 [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN },
129 [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
130 [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN },
131 [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
132 [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 },
133 [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN },
134 [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 },
135 [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 },
136 [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 },
137 [BATADV_ATTR_VLANID] = { .type = NLA_U16 },
138 [BATADV_ATTR_AGGREGATED_OGMS_ENABLED] = { .type = NLA_U8 },
139 [BATADV_ATTR_AP_ISOLATION_ENABLED] = { .type = NLA_U8 },
140 [BATADV_ATTR_ISOLATION_MARK] = { .type = NLA_U32 },
141 [BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 },
142 [BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 },
143 [BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 },
144 [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 },
145 [BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 },
146 [BATADV_ATTR_GW_BANDWIDTH_DOWN] = { .type = NLA_U32 },
147 [BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 },
148 [BATADV_ATTR_GW_MODE] = { .type = NLA_U8 },
149 [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 },
150 [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 },
151 [BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 },
152 [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 },
153 [BATADV_ATTR_MULTICAST_FANOUT] = { .type = NLA_U32 },
154 [BATADV_ATTR_ORIG_INTERVAL] = { .type = NLA_U32 },
155 [BATADV_ATTR_ELP_INTERVAL] = { .type = NLA_U32 },
156 [BATADV_ATTR_THROUGHPUT_OVERRIDE] = { .type = NLA_U32 },
157 };
158
159 /**
160 * batadv_netlink_get_ifindex() - Extract an interface index from a message
161 * @nlh: Message header
162 * @attrtype: Attribute which holds an interface index
163 *
164 * Return: interface index, or 0.
165 */
batadv_netlink_get_ifindex(const struct nlmsghdr * nlh,int attrtype)166 static int batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
167 {
168 struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
169
170 return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
171 }
172
173 /**
174 * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation meshif attribute
175 * @msg: Netlink message to dump into
176 * @bat_priv: the bat priv with all the mesh interface information
177 *
178 * Return: 0 on success or negative error number in case of failure
179 */
batadv_netlink_mesh_fill_ap_isolation(struct sk_buff * msg,struct batadv_priv * bat_priv)180 static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg,
181 struct batadv_priv *bat_priv)
182 {
183 struct batadv_meshif_vlan *vlan;
184 u8 ap_isolation;
185
186 vlan = batadv_meshif_vlan_get(bat_priv, BATADV_NO_FLAGS);
187 if (!vlan)
188 return 0;
189
190 ap_isolation = READ_ONCE(vlan->ap_isolation);
191 batadv_meshif_vlan_put(vlan);
192
193 return nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
194 !!ap_isolation);
195 }
196
197 /**
198 * batadv_netlink_set_mesh_ap_isolation() - Set ap_isolation from genl msg
199 * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute
200 * @bat_priv: the bat priv with all the mesh interface information
201 *
202 * Return: 0 on success or negative error number in case of failure
203 */
batadv_netlink_set_mesh_ap_isolation(struct nlattr * attr,struct batadv_priv * bat_priv)204 static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr,
205 struct batadv_priv *bat_priv)
206 {
207 struct batadv_meshif_vlan *vlan;
208
209 vlan = batadv_meshif_vlan_get(bat_priv, BATADV_NO_FLAGS);
210 if (!vlan)
211 return -ENOENT;
212
213 WRITE_ONCE(vlan->ap_isolation, !!nla_get_u8(attr));
214 batadv_meshif_vlan_put(vlan);
215
216 return 0;
217 }
218
219 /**
220 * batadv_netlink_mesh_fill() - Fill message with mesh attributes
221 * @msg: Netlink message to dump into
222 * @bat_priv: the bat priv with all the mesh interface information
223 * @cmd: type of message to generate
224 * @portid: Port making netlink request
225 * @seq: sequence number for message
226 * @flags: Additional flags for message
227 *
228 * Return: 0 on success or negative error number in case of failure
229 */
batadv_netlink_mesh_fill(struct sk_buff * msg,struct batadv_priv * bat_priv,enum batadv_nl_commands cmd,u32 portid,u32 seq,int flags)230 static int batadv_netlink_mesh_fill(struct sk_buff *msg,
231 struct batadv_priv *bat_priv,
232 enum batadv_nl_commands cmd,
233 u32 portid, u32 seq, int flags)
234 {
235 struct net_device *mesh_iface = bat_priv->mesh_iface;
236 struct batadv_hard_iface *primary_if = NULL;
237 struct net_device *hard_iface;
238 void *hdr;
239
240 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
241 if (!hdr)
242 return -ENOBUFS;
243
244 if (nla_put_string(msg, BATADV_ATTR_VERSION, init_utsname()->release) ||
245 nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
246 bat_priv->algo_ops->name) ||
247 nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, mesh_iface->ifindex) ||
248 nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, mesh_iface->name) ||
249 nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
250 mesh_iface->dev_addr) ||
251 nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
252 (u8)atomic_read(&bat_priv->tt.vn)))
253 goto nla_put_failure;
254
255 #ifdef CONFIG_BATMAN_ADV_BLA
256 if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
257 ntohs(bat_priv->bla.claim_dest.group)))
258 goto nla_put_failure;
259 #endif
260
261 if (batadv_mcast_mesh_info_put(msg, bat_priv))
262 goto nla_put_failure;
263
264 primary_if = batadv_primary_if_get_selected(bat_priv);
265 if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
266 hard_iface = primary_if->net_dev;
267
268 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
269 hard_iface->ifindex) ||
270 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
271 hard_iface->name) ||
272 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
273 hard_iface->dev_addr))
274 goto nla_put_failure;
275 }
276
277 if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS_ENABLED,
278 !!READ_ONCE(bat_priv->aggregated_ogms)))
279 goto nla_put_failure;
280
281 if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv))
282 goto nla_put_failure;
283
284 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MARK,
285 bat_priv->isolation_mark))
286 goto nla_put_failure;
287
288 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MASK,
289 bat_priv->isolation_mark_mask))
290 goto nla_put_failure;
291
292 if (nla_put_u8(msg, BATADV_ATTR_BONDING_ENABLED,
293 !!READ_ONCE(bat_priv->bonding)))
294 goto nla_put_failure;
295
296 #ifdef CONFIG_BATMAN_ADV_BLA
297 if (nla_put_u8(msg, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
298 !!READ_ONCE(bat_priv->bridge_loop_avoidance)))
299 goto nla_put_failure;
300 #endif /* CONFIG_BATMAN_ADV_BLA */
301
302 #ifdef CONFIG_BATMAN_ADV_DAT
303 if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
304 !!READ_ONCE(bat_priv->distributed_arp_table)))
305 goto nla_put_failure;
306 #endif /* CONFIG_BATMAN_ADV_DAT */
307
308 if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED,
309 !!READ_ONCE(bat_priv->fragmentation)))
310 goto nla_put_failure;
311
312 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_DOWN,
313 READ_ONCE(bat_priv->gw.bandwidth_down)))
314 goto nla_put_failure;
315
316 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_UP,
317 READ_ONCE(bat_priv->gw.bandwidth_up)))
318 goto nla_put_failure;
319
320 if (nla_put_u8(msg, BATADV_ATTR_GW_MODE,
321 READ_ONCE(bat_priv->gw.mode)))
322 goto nla_put_failure;
323
324 if (bat_priv->algo_ops->gw.get_best_gw_node &&
325 bat_priv->algo_ops->gw.is_eligible) {
326 /* GW selection class is not available if the routing algorithm
327 * in use does not implement the GW API
328 */
329 if (nla_put_u32(msg, BATADV_ATTR_GW_SEL_CLASS,
330 READ_ONCE(bat_priv->gw.sel_class)))
331 goto nla_put_failure;
332 }
333
334 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
335 READ_ONCE(bat_priv->hop_penalty)))
336 goto nla_put_failure;
337
338 #ifdef CONFIG_BATMAN_ADV_DEBUG
339 if (nla_put_u32(msg, BATADV_ATTR_LOG_LEVEL,
340 READ_ONCE(bat_priv->log_level)))
341 goto nla_put_failure;
342 #endif /* CONFIG_BATMAN_ADV_DEBUG */
343
344 #ifdef CONFIG_BATMAN_ADV_MCAST
345 if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
346 !READ_ONCE(bat_priv->multicast_mode)))
347 goto nla_put_failure;
348
349 if (nla_put_u32(msg, BATADV_ATTR_MULTICAST_FANOUT,
350 READ_ONCE(bat_priv->multicast_fanout)))
351 goto nla_put_failure;
352 #endif /* CONFIG_BATMAN_ADV_MCAST */
353
354 if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL,
355 READ_ONCE(bat_priv->orig_interval)))
356 goto nla_put_failure;
357
358 batadv_hardif_put(primary_if);
359
360 genlmsg_end(msg, hdr);
361 return 0;
362
363 nla_put_failure:
364 batadv_hardif_put(primary_if);
365
366 genlmsg_cancel(msg, hdr);
367 return -EMSGSIZE;
368 }
369
370 /**
371 * batadv_netlink_notify_mesh() - send meshif attributes to listener
372 * @bat_priv: the bat priv with all the mesh interface information
373 *
374 * Return: 0 on success, < 0 on error
375 */
batadv_netlink_notify_mesh(struct batadv_priv * bat_priv)376 static int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
377 {
378 struct sk_buff *msg;
379 int ret;
380
381 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
382 if (!msg)
383 return -ENOMEM;
384
385 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH,
386 0, 0, 0);
387 if (ret < 0) {
388 nlmsg_free(msg);
389 return ret;
390 }
391
392 genlmsg_multicast_netns(&batadv_netlink_family,
393 dev_net(bat_priv->mesh_iface), msg, 0,
394 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
395
396 return 0;
397 }
398
399 /**
400 * batadv_netlink_get_mesh() - Get meshif attributes
401 * @skb: Netlink message with request data
402 * @info: receiver information
403 *
404 * Return: 0 on success or negative error number in case of failure
405 */
batadv_netlink_get_mesh(struct sk_buff * skb,struct genl_info * info)406 static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info)
407 {
408 struct batadv_priv *bat_priv = info->user_ptr[0];
409 struct sk_buff *msg;
410 int ret;
411
412 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
413 if (!msg)
414 return -ENOMEM;
415
416 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH,
417 info->snd_portid, info->snd_seq, 0);
418 if (ret < 0) {
419 nlmsg_free(msg);
420 return ret;
421 }
422
423 ret = genlmsg_reply(msg, info);
424
425 return ret;
426 }
427
428 /**
429 * batadv_netlink_set_mesh() - Set meshif attributes
430 * @skb: Netlink message with request data
431 * @info: receiver information
432 *
433 * Return: 0 on success or negative error number in case of failure
434 */
batadv_netlink_set_mesh(struct sk_buff * skb,struct genl_info * info)435 static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
436 {
437 struct batadv_priv *bat_priv = info->user_ptr[0];
438 struct nlattr *attr;
439
440 if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) {
441 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED];
442
443 WRITE_ONCE(bat_priv->aggregated_ogms, !!nla_get_u8(attr));
444 }
445
446 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
447 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
448
449 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv);
450 }
451
452 if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) {
453 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK];
454
455 bat_priv->isolation_mark = nla_get_u32(attr);
456 }
457
458 if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) {
459 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK];
460
461 bat_priv->isolation_mark_mask = nla_get_u32(attr);
462 }
463
464 if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) {
465 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED];
466
467 WRITE_ONCE(bat_priv->bonding, !!nla_get_u8(attr));
468 }
469
470 #ifdef CONFIG_BATMAN_ADV_BLA
471 if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) {
472 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED];
473
474 WRITE_ONCE(bat_priv->bridge_loop_avoidance,
475 !!nla_get_u8(attr));
476 batadv_bla_status_update(bat_priv->mesh_iface);
477 }
478 #endif /* CONFIG_BATMAN_ADV_BLA */
479
480 #ifdef CONFIG_BATMAN_ADV_DAT
481 if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
482 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
483
484 WRITE_ONCE(bat_priv->distributed_arp_table,
485 !!nla_get_u8(attr));
486 batadv_dat_status_update(bat_priv->mesh_iface);
487 }
488 #endif /* CONFIG_BATMAN_ADV_DAT */
489
490 if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
491 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
492
493 WRITE_ONCE(bat_priv->fragmentation, !!nla_get_u8(attr));
494
495 rtnl_lock();
496 batadv_update_min_mtu(bat_priv->mesh_iface);
497 rtnl_unlock();
498 }
499
500 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {
501 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN];
502
503 WRITE_ONCE(bat_priv->gw.bandwidth_down, nla_get_u32(attr));
504 batadv_gw_tvlv_container_update(bat_priv);
505 }
506
507 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) {
508 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP];
509
510 WRITE_ONCE(bat_priv->gw.bandwidth_up, nla_get_u32(attr));
511 batadv_gw_tvlv_container_update(bat_priv);
512 }
513
514 if (info->attrs[BATADV_ATTR_GW_MODE]) {
515 u8 gw_mode;
516
517 attr = info->attrs[BATADV_ATTR_GW_MODE];
518 gw_mode = nla_get_u8(attr);
519
520 if (gw_mode <= BATADV_GW_MODE_SERVER) {
521 /* Invoking batadv_gw_reselect() is not enough to really
522 * de-select the current GW. It will only instruct the
523 * gateway client code to perform a re-election the next
524 * time that this is needed.
525 *
526 * When gw client mode is being switched off the current
527 * GW must be de-selected explicitly otherwise no GW_ADD
528 * uevent is thrown on client mode re-activation. This
529 * is operation is performed in
530 * batadv_gw_check_client_stop().
531 */
532 batadv_gw_reselect(bat_priv);
533
534 /* always call batadv_gw_check_client_stop() before
535 * changing the gateway state
536 */
537 batadv_gw_check_client_stop(bat_priv);
538 WRITE_ONCE(bat_priv->gw.mode, gw_mode);
539 batadv_gw_tvlv_container_update(bat_priv);
540 }
541 }
542
543 if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] &&
544 bat_priv->algo_ops->gw.get_best_gw_node &&
545 bat_priv->algo_ops->gw.is_eligible) {
546 /* setting the GW selection class is allowed only if the routing
547 * algorithm in use implements the GW API
548 */
549
550 u32 sel_class_max = bat_priv->algo_ops->gw.sel_class_max;
551 u32 sel_class;
552
553 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
554 sel_class = nla_get_u32(attr);
555
556 if (sel_class >= 1 && sel_class <= sel_class_max) {
557 WRITE_ONCE(bat_priv->gw.sel_class, sel_class);
558 batadv_gw_reselect(bat_priv);
559 }
560 }
561
562 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
563 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
564
565 WRITE_ONCE(bat_priv->hop_penalty, nla_get_u8(attr));
566 }
567
568 #ifdef CONFIG_BATMAN_ADV_DEBUG
569 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) {
570 attr = info->attrs[BATADV_ATTR_LOG_LEVEL];
571
572 WRITE_ONCE(bat_priv->log_level,
573 nla_get_u32(attr) & BATADV_DBG_ALL);
574 }
575 #endif /* CONFIG_BATMAN_ADV_DEBUG */
576
577 #ifdef CONFIG_BATMAN_ADV_MCAST
578 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) {
579 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
580
581 WRITE_ONCE(bat_priv->multicast_mode, !nla_get_u8(attr));
582 }
583
584 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) {
585 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT];
586
587 WRITE_ONCE(bat_priv->multicast_fanout, nla_get_u32(attr));
588 }
589 #endif /* CONFIG_BATMAN_ADV_MCAST */
590
591 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
592 u32 orig_interval;
593
594 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
595 orig_interval = nla_get_u32(attr);
596
597 orig_interval = min_t(u32, orig_interval, INT_MAX);
598 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
599
600 WRITE_ONCE(bat_priv->orig_interval, orig_interval);
601 }
602
603 batadv_netlink_notify_mesh(bat_priv);
604
605 return 0;
606 }
607
608 /**
609 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
610 * @msg: netlink message to be sent back
611 * @cookie: tp meter session cookie
612 *
613 * Return: 0 on success, < 0 on error
614 */
615 static int
batadv_netlink_tp_meter_put(struct sk_buff * msg,u32 cookie)616 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
617 {
618 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
619 return -ENOBUFS;
620
621 return 0;
622 }
623
624 /**
625 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
626 * @bat_priv: the bat priv with all the mesh interface information
627 * @dst: destination of tp_meter session
628 * @result: reason for tp meter session stop
629 * @test_time: total time of the tp_meter session
630 * @total_bytes: bytes acked to the receiver
631 * @cookie: cookie of tp_meter session
632 *
633 * Return: 0 on success, < 0 on error
634 */
batadv_netlink_tpmeter_notify(struct batadv_priv * bat_priv,const u8 * dst,u8 result,u32 test_time,u64 total_bytes,u32 cookie)635 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
636 u8 result, u32 test_time, u64 total_bytes,
637 u32 cookie)
638 {
639 struct sk_buff *msg;
640 void *hdr;
641 int ret;
642
643 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
644 if (!msg)
645 return -ENOMEM;
646
647 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
648 BATADV_CMD_TP_METER);
649 if (!hdr) {
650 ret = -ENOBUFS;
651 goto err_genlmsg;
652 }
653
654 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
655 goto nla_put_failure;
656
657 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
658 goto nla_put_failure;
659
660 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
661 BATADV_ATTR_PAD))
662 goto nla_put_failure;
663
664 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
665 goto nla_put_failure;
666
667 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
668 goto nla_put_failure;
669
670 genlmsg_end(msg, hdr);
671
672 genlmsg_multicast_netns(&batadv_netlink_family,
673 dev_net(bat_priv->mesh_iface), msg, 0,
674 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
675
676 return 0;
677
678 nla_put_failure:
679 genlmsg_cancel(msg, hdr);
680 ret = -EMSGSIZE;
681
682 err_genlmsg:
683 nlmsg_free(msg);
684 return ret;
685 }
686
687 /**
688 * batadv_netlink_tp_meter_start() - Start a new tp_meter session
689 * @skb: received netlink message
690 * @info: receiver information
691 *
692 * Return: 0 on success, < 0 on error
693 */
694 static int
batadv_netlink_tp_meter_start(struct sk_buff * skb,struct genl_info * info)695 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
696 {
697 struct batadv_priv *bat_priv = info->user_ptr[0];
698 struct sk_buff *msg = NULL;
699 u32 test_length;
700 void *msg_head;
701 u32 cookie;
702 u8 *dst;
703 int ret;
704
705 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
706 return -EINVAL;
707
708 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
709 return -EINVAL;
710
711 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
712
713 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
714
715 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
716 if (!msg) {
717 ret = -ENOMEM;
718 goto out;
719 }
720
721 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
722 &batadv_netlink_family, 0,
723 BATADV_CMD_TP_METER);
724 if (!msg_head) {
725 ret = -ENOBUFS;
726 goto out;
727 }
728
729 batadv_tp_start(bat_priv, dst, test_length, &cookie);
730
731 ret = batadv_netlink_tp_meter_put(msg, cookie);
732
733 out:
734 if (ret) {
735 if (msg)
736 nlmsg_free(msg);
737 return ret;
738 }
739
740 genlmsg_end(msg, msg_head);
741 return genlmsg_reply(msg, info);
742 }
743
744 /**
745 * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session
746 * @skb: received netlink message
747 * @info: receiver information
748 *
749 * Return: 0 on success, < 0 on error
750 */
751 static int
batadv_netlink_tp_meter_cancel(struct sk_buff * skb,struct genl_info * info)752 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
753 {
754 struct batadv_priv *bat_priv = info->user_ptr[0];
755 int ret = 0;
756 u8 *dst;
757
758 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
759 return -EINVAL;
760
761 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
762
763 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
764
765 return ret;
766 }
767
768 /**
769 * batadv_netlink_hardif_fill() - Fill message with hardif attributes
770 * @msg: Netlink message to dump into
771 * @bat_priv: the bat priv with all the mesh interface information
772 * @hard_iface: hard interface which was modified
773 * @cmd: type of message to generate
774 * @portid: Port making netlink request
775 * @seq: sequence number for message
776 * @flags: Additional flags for message
777 * @cb: Control block containing additional options
778 *
779 * Return: 0 on success or negative error number in case of failure
780 */
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)781 static int batadv_netlink_hardif_fill(struct sk_buff *msg,
782 struct batadv_priv *bat_priv,
783 struct batadv_hard_iface *hard_iface,
784 enum batadv_nl_commands cmd,
785 u32 portid, u32 seq, int flags,
786 struct netlink_callback *cb)
787 {
788 struct net_device *net_dev = hard_iface->net_dev;
789 void *hdr;
790
791 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
792 if (!hdr)
793 return -ENOBUFS;
794
795 if (cb)
796 genl_dump_check_consistent(cb, hdr);
797
798 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
799 bat_priv->mesh_iface->ifindex))
800 goto nla_put_failure;
801
802 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME,
803 bat_priv->mesh_iface->name))
804 goto nla_put_failure;
805
806 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
807 net_dev->ifindex) ||
808 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
809 net_dev->name) ||
810 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
811 net_dev->dev_addr))
812 goto nla_put_failure;
813
814 if (hard_iface->if_status == BATADV_IF_ACTIVE) {
815 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
816 goto nla_put_failure;
817 }
818
819 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
820 READ_ONCE(hard_iface->hop_penalty)))
821 goto nla_put_failure;
822
823 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
824 if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL,
825 READ_ONCE(hard_iface->bat_v.elp_interval)))
826 goto nla_put_failure;
827
828 if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE,
829 READ_ONCE(hard_iface->bat_v.throughput_override)))
830 goto nla_put_failure;
831 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
832
833 genlmsg_end(msg, hdr);
834 return 0;
835
836 nla_put_failure:
837 genlmsg_cancel(msg, hdr);
838 return -EMSGSIZE;
839 }
840
841 /**
842 * batadv_netlink_notify_hardif() - send hardif attributes to listener
843 * @bat_priv: the bat priv with all the mesh interface information
844 * @hard_iface: hard interface which was modified
845 *
846 * Return: 0 on success, < 0 on error
847 */
batadv_netlink_notify_hardif(struct batadv_priv * bat_priv,struct batadv_hard_iface * hard_iface)848 static int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
849 struct batadv_hard_iface *hard_iface)
850 {
851 struct sk_buff *msg;
852 int ret;
853
854 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
855 if (!msg)
856 return -ENOMEM;
857
858 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
859 BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL);
860 if (ret < 0) {
861 nlmsg_free(msg);
862 return ret;
863 }
864
865 genlmsg_multicast_netns(&batadv_netlink_family,
866 dev_net(bat_priv->mesh_iface), msg, 0,
867 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
868
869 return 0;
870 }
871
872 /**
873 * batadv_netlink_cmd_get_hardif() - Get hardif attributes
874 * @skb: Netlink message with request data
875 * @info: receiver information
876 *
877 * Return: 0 on success or negative error number in case of failure
878 */
batadv_netlink_cmd_get_hardif(struct sk_buff * skb,struct genl_info * info)879 static int batadv_netlink_cmd_get_hardif(struct sk_buff *skb,
880 struct genl_info *info)
881 {
882 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
883 struct batadv_priv *bat_priv = info->user_ptr[0];
884 struct sk_buff *msg;
885 int ret;
886
887 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
888 if (!msg)
889 return -ENOMEM;
890
891 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
892 BATADV_CMD_GET_HARDIF,
893 info->snd_portid, info->snd_seq, 0,
894 NULL);
895 if (ret < 0) {
896 nlmsg_free(msg);
897 return ret;
898 }
899
900 ret = genlmsg_reply(msg, info);
901
902 return ret;
903 }
904
905 /**
906 * batadv_netlink_set_hardif() - Set hardif attributes
907 * @skb: Netlink message with request data
908 * @info: receiver information
909 *
910 * Return: 0 on success or negative error number in case of failure
911 */
batadv_netlink_set_hardif(struct sk_buff * skb,struct genl_info * info)912 static int batadv_netlink_set_hardif(struct sk_buff *skb,
913 struct genl_info *info)
914 {
915 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
916 struct batadv_priv *bat_priv = info->user_ptr[0];
917 struct nlattr *attr;
918
919 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
920 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
921
922 WRITE_ONCE(hard_iface->hop_penalty, nla_get_u8(attr));
923 }
924
925 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
926
927 if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) {
928 u32 elp_interval;
929
930 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL];
931 elp_interval = nla_get_u32(attr);
932
933 elp_interval = min_t(u32, elp_interval, INT_MAX);
934 elp_interval = max_t(u32, elp_interval, BATADV_JITTER);
935
936 WRITE_ONCE(hard_iface->bat_v.elp_interval, elp_interval);
937 }
938
939 if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) {
940 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE];
941
942 WRITE_ONCE(hard_iface->bat_v.throughput_override,
943 nla_get_u32(attr));
944 }
945 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
946
947 batadv_netlink_notify_hardif(bat_priv, hard_iface);
948
949 return 0;
950 }
951
952 /**
953 * batadv_netlink_dump_hardif() - Dump all hard interfaces into a message
954 * @msg: Netlink message to dump into
955 * @cb: Parameters from query
956 *
957 * Return: error code, or length of reply message on success
958 */
959 static int
batadv_netlink_dump_hardif(struct sk_buff * msg,struct netlink_callback * cb)960 batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb)
961 {
962 int portid = NETLINK_CB(cb->skb).portid;
963 struct batadv_hard_iface *hard_iface;
964 struct net_device *mesh_iface;
965 struct batadv_priv *bat_priv;
966 int skip = cb->args[0];
967 struct list_head *iter;
968 int i = 0;
969
970 mesh_iface = batadv_netlink_get_meshif(cb);
971 if (IS_ERR(mesh_iface))
972 return PTR_ERR(mesh_iface);
973
974 bat_priv = netdev_priv(mesh_iface);
975
976 rtnl_lock();
977 cb->seq = bat_priv->hardif_generation << 1 | 1;
978
979 netdev_for_each_lower_private(mesh_iface, hard_iface, iter) {
980 if (i++ < skip)
981 continue;
982
983 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
984 BATADV_CMD_GET_HARDIF,
985 portid, cb->nlh->nlmsg_seq,
986 NLM_F_MULTI, cb)) {
987 i--;
988 break;
989 }
990 }
991
992 rtnl_unlock();
993
994 dev_put(mesh_iface);
995
996 cb->args[0] = i;
997
998 return msg->len;
999 }
1000
1001 /**
1002 * batadv_netlink_vlan_fill() - Fill message with vlan attributes
1003 * @msg: Netlink message to dump into
1004 * @bat_priv: the bat priv with all the mesh interface information
1005 * @vlan: vlan which was modified
1006 * @cmd: type of message to generate
1007 * @portid: Port making netlink request
1008 * @seq: sequence number for message
1009 * @flags: Additional flags for message
1010 *
1011 * Return: 0 on success or negative error number in case of failure
1012 */
batadv_netlink_vlan_fill(struct sk_buff * msg,struct batadv_priv * bat_priv,struct batadv_meshif_vlan * vlan,enum batadv_nl_commands cmd,u32 portid,u32 seq,int flags)1013 static int batadv_netlink_vlan_fill(struct sk_buff *msg,
1014 struct batadv_priv *bat_priv,
1015 struct batadv_meshif_vlan *vlan,
1016 enum batadv_nl_commands cmd,
1017 u32 portid, u32 seq, int flags)
1018 {
1019 void *hdr;
1020
1021 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
1022 if (!hdr)
1023 return -ENOBUFS;
1024
1025 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
1026 bat_priv->mesh_iface->ifindex))
1027 goto nla_put_failure;
1028
1029 if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME,
1030 bat_priv->mesh_iface->name))
1031 goto nla_put_failure;
1032
1033 if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK))
1034 goto nla_put_failure;
1035
1036 if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
1037 !!READ_ONCE(vlan->ap_isolation)))
1038 goto nla_put_failure;
1039
1040 genlmsg_end(msg, hdr);
1041 return 0;
1042
1043 nla_put_failure:
1044 genlmsg_cancel(msg, hdr);
1045 return -EMSGSIZE;
1046 }
1047
1048 /**
1049 * batadv_netlink_notify_vlan() - send vlan attributes to listener
1050 * @bat_priv: the bat priv with all the mesh interface information
1051 * @vlan: vlan which was modified
1052 *
1053 * Return: 0 on success, < 0 on error
1054 */
batadv_netlink_notify_vlan(struct batadv_priv * bat_priv,struct batadv_meshif_vlan * vlan)1055 static int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
1056 struct batadv_meshif_vlan *vlan)
1057 {
1058 struct sk_buff *msg;
1059 int ret;
1060
1061 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1062 if (!msg)
1063 return -ENOMEM;
1064
1065 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan,
1066 BATADV_CMD_SET_VLAN, 0, 0, 0);
1067 if (ret < 0) {
1068 nlmsg_free(msg);
1069 return ret;
1070 }
1071
1072 genlmsg_multicast_netns(&batadv_netlink_family,
1073 dev_net(bat_priv->mesh_iface), msg, 0,
1074 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
1075
1076 return 0;
1077 }
1078
1079 /**
1080 * batadv_netlink_get_vlan() - Get vlan attributes
1081 * @skb: Netlink message with request data
1082 * @info: receiver information
1083 *
1084 * Return: 0 on success or negative error number in case of failure
1085 */
batadv_netlink_get_vlan(struct sk_buff * skb,struct genl_info * info)1086 static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info)
1087 {
1088 struct batadv_meshif_vlan *vlan = info->user_ptr[1];
1089 struct batadv_priv *bat_priv = info->user_ptr[0];
1090 struct sk_buff *msg;
1091 int ret;
1092
1093 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1094 if (!msg)
1095 return -ENOMEM;
1096
1097 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN,
1098 info->snd_portid, info->snd_seq, 0);
1099 if (ret < 0) {
1100 nlmsg_free(msg);
1101 return ret;
1102 }
1103
1104 ret = genlmsg_reply(msg, info);
1105
1106 return ret;
1107 }
1108
1109 /**
1110 * batadv_netlink_set_vlan() - Set vlan attributes
1111 * @skb: Netlink message with request data
1112 * @info: receiver information
1113 *
1114 * Return: 0 on success or negative error number in case of failure
1115 */
batadv_netlink_set_vlan(struct sk_buff * skb,struct genl_info * info)1116 static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info)
1117 {
1118 struct batadv_meshif_vlan *vlan = info->user_ptr[1];
1119 struct batadv_priv *bat_priv = info->user_ptr[0];
1120 struct nlattr *attr;
1121
1122 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
1123 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
1124
1125 WRITE_ONCE(vlan->ap_isolation, !!nla_get_u8(attr));
1126 }
1127
1128 batadv_netlink_notify_vlan(bat_priv, vlan);
1129
1130 return 0;
1131 }
1132
1133 /**
1134 * batadv_netlink_get_meshif_from_ifindex() - Get mesh-iface from ifindex
1135 * @net: the applicable net namespace
1136 * @ifindex: index of the mesh interface
1137 *
1138 * Return: Pointer to mesh interface (with increased refcnt) on success, error
1139 * pointer on error
1140 */
1141 static struct net_device *
batadv_netlink_get_meshif_from_ifindex(struct net * net,int ifindex)1142 batadv_netlink_get_meshif_from_ifindex(struct net *net, int ifindex)
1143 {
1144 struct net_device *mesh_iface;
1145
1146 mesh_iface = dev_get_by_index(net, ifindex);
1147 if (!mesh_iface)
1148 return ERR_PTR(-ENODEV);
1149
1150 if (!batadv_meshif_is_valid(mesh_iface))
1151 goto err_put_meshif;
1152
1153 return mesh_iface;
1154
1155 err_put_meshif:
1156 dev_put(mesh_iface);
1157
1158 return ERR_PTR(-EINVAL);
1159 }
1160
1161 /**
1162 * batadv_netlink_get_meshif_from_info() - Get mesh-iface from genl attributes
1163 * @net: the applicable net namespace
1164 * @info: receiver information
1165 *
1166 * Return: Pointer to mesh interface (with increased refcnt) on success, error
1167 * pointer on error
1168 */
1169 static struct net_device *
batadv_netlink_get_meshif_from_info(struct net * net,struct genl_info * info)1170 batadv_netlink_get_meshif_from_info(struct net *net, struct genl_info *info)
1171 {
1172 int ifindex;
1173
1174 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
1175 return ERR_PTR(-EINVAL);
1176
1177 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
1178
1179 return batadv_netlink_get_meshif_from_ifindex(net, ifindex);
1180 }
1181
1182 /**
1183 * batadv_netlink_get_meshif() - Retrieve mesh interface from netlink callback
1184 * @cb: callback structure containing arguments
1185 *
1186 * Return: Pointer to mesh interface (with increased refcnt) on success, error
1187 * pointer on error
1188 */
batadv_netlink_get_meshif(struct netlink_callback * cb)1189 struct net_device *batadv_netlink_get_meshif(struct netlink_callback *cb)
1190 {
1191 int ifindex = batadv_netlink_get_ifindex(cb->nlh,
1192 BATADV_ATTR_MESH_IFINDEX);
1193 if (!ifindex)
1194 return ERR_PTR(-ENONET);
1195
1196 return batadv_netlink_get_meshif_from_ifindex(sock_net(cb->skb->sk),
1197 ifindex);
1198 }
1199
1200 /**
1201 * batadv_netlink_get_hardif_from_ifindex() - Get hard-iface from ifindex
1202 * @bat_priv: the bat priv with all the mesh interface information
1203 * @net: the applicable net namespace
1204 * @ifindex: index of the hard interface
1205 *
1206 * Return: Pointer to hard interface (with increased refcnt) on success, error
1207 * pointer on error
1208 */
1209 static struct batadv_hard_iface *
batadv_netlink_get_hardif_from_ifindex(struct batadv_priv * bat_priv,struct net * net,int ifindex)1210 batadv_netlink_get_hardif_from_ifindex(struct batadv_priv *bat_priv,
1211 struct net *net, int ifindex)
1212 {
1213 struct batadv_hard_iface *hard_iface;
1214 struct net_device *hard_dev;
1215
1216 hard_dev = dev_get_by_index(net, ifindex);
1217 if (!hard_dev)
1218 return ERR_PTR(-ENODEV);
1219
1220 rtnl_lock();
1221 hard_iface = batadv_hardif_get_by_netdev(hard_dev);
1222 rtnl_unlock();
1223 if (!hard_iface)
1224 goto err_put_harddev;
1225
1226 if (hard_iface->mesh_iface != bat_priv->mesh_iface)
1227 goto err_put_hardif;
1228
1229 /* hard_dev is referenced by hard_iface and not needed here */
1230 dev_put(hard_dev);
1231
1232 return hard_iface;
1233
1234 err_put_hardif:
1235 batadv_hardif_put(hard_iface);
1236 err_put_harddev:
1237 dev_put(hard_dev);
1238
1239 return ERR_PTR(-EINVAL);
1240 }
1241
1242 /**
1243 * batadv_netlink_get_hardif_from_info() - Get hard-iface from genl attributes
1244 * @bat_priv: the bat priv with all the mesh interface information
1245 * @net: the applicable net namespace
1246 * @info: receiver information
1247 *
1248 * Return: Pointer to hard interface (with increased refcnt) on success, error
1249 * pointer on error
1250 */
1251 static struct batadv_hard_iface *
batadv_netlink_get_hardif_from_info(struct batadv_priv * bat_priv,struct net * net,struct genl_info * info)1252 batadv_netlink_get_hardif_from_info(struct batadv_priv *bat_priv,
1253 struct net *net, struct genl_info *info)
1254 {
1255 int ifindex;
1256
1257 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX])
1258 return ERR_PTR(-EINVAL);
1259
1260 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]);
1261
1262 return batadv_netlink_get_hardif_from_ifindex(bat_priv, net, ifindex);
1263 }
1264
1265 /**
1266 * batadv_netlink_get_hardif() - Retrieve hard interface from netlink callback
1267 * @bat_priv: the bat priv with all the mesh interface information
1268 * @cb: callback structure containing arguments
1269 *
1270 * Return: Pointer to hard interface (with increased refcnt) on success, error
1271 * pointer on error
1272 */
1273 struct batadv_hard_iface *
batadv_netlink_get_hardif(struct batadv_priv * bat_priv,struct netlink_callback * cb)1274 batadv_netlink_get_hardif(struct batadv_priv *bat_priv,
1275 struct netlink_callback *cb)
1276 {
1277 int ifindex = batadv_netlink_get_ifindex(cb->nlh,
1278 BATADV_ATTR_HARD_IFINDEX);
1279 if (!ifindex)
1280 return ERR_PTR(-ENONET);
1281
1282 return batadv_netlink_get_hardif_from_ifindex(bat_priv,
1283 sock_net(cb->skb->sk),
1284 ifindex);
1285 }
1286
1287 /**
1288 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes
1289 * @bat_priv: the bat priv with all the mesh interface information
1290 * @net: the applicable net namespace
1291 * @info: receiver information
1292 *
1293 * Return: Pointer to vlan on success (with increased refcnt), error pointer
1294 * on error
1295 */
1296 static struct batadv_meshif_vlan *
batadv_get_vlan_from_info(struct batadv_priv * bat_priv,struct net * net,struct genl_info * info)1297 batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net,
1298 struct genl_info *info)
1299 {
1300 struct batadv_meshif_vlan *vlan;
1301 u16 vid;
1302
1303 if (!info->attrs[BATADV_ATTR_VLANID])
1304 return ERR_PTR(-EINVAL);
1305
1306 vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]);
1307
1308 vlan = batadv_meshif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
1309 if (!vlan)
1310 return ERR_PTR(-ENOENT);
1311
1312 return vlan;
1313 }
1314
1315 /**
1316 * batadv_pre_doit() - Prepare batman-adv genl doit request
1317 * @ops: requested netlink operation
1318 * @skb: Netlink message with request data
1319 * @info: receiver information
1320 *
1321 * Return: 0 on success or negative error number in case of failure
1322 */
batadv_pre_doit(const struct genl_split_ops * ops,struct sk_buff * skb,struct genl_info * info)1323 static int batadv_pre_doit(const struct genl_split_ops *ops,
1324 struct sk_buff *skb,
1325 struct genl_info *info)
1326 {
1327 struct net *net = genl_info_net(info);
1328 struct batadv_hard_iface *hard_iface;
1329 struct batadv_priv *bat_priv = NULL;
1330 struct batadv_meshif_vlan *vlan;
1331 struct net_device *mesh_iface;
1332 u8 user_ptr1_flags;
1333 u8 mesh_dep_flags;
1334 int ret;
1335
1336 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1337 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1))
1338 return -EINVAL;
1339
1340 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1341 if (WARN_ON((ops->internal_flags & mesh_dep_flags) &&
1342 (~ops->internal_flags & BATADV_FLAG_NEED_MESH)))
1343 return -EINVAL;
1344
1345 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) {
1346 mesh_iface = batadv_netlink_get_meshif_from_info(net, info);
1347 if (IS_ERR(mesh_iface))
1348 return PTR_ERR(mesh_iface);
1349
1350 bat_priv = netdev_priv(mesh_iface);
1351 info->user_ptr[0] = bat_priv;
1352 }
1353
1354 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) {
1355 hard_iface = batadv_netlink_get_hardif_from_info(bat_priv, net,
1356 info);
1357 if (IS_ERR(hard_iface)) {
1358 ret = PTR_ERR(hard_iface);
1359 goto err_put_meshif;
1360 }
1361
1362 info->user_ptr[1] = hard_iface;
1363 }
1364
1365 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) {
1366 vlan = batadv_get_vlan_from_info(bat_priv, net, info);
1367 if (IS_ERR(vlan)) {
1368 ret = PTR_ERR(vlan);
1369 goto err_put_meshif;
1370 }
1371
1372 info->user_ptr[1] = vlan;
1373 }
1374
1375 return 0;
1376
1377 err_put_meshif:
1378 if (bat_priv)
1379 dev_put(bat_priv->mesh_iface);
1380
1381 return ret;
1382 }
1383
1384 /**
1385 * batadv_post_doit() - End batman-adv genl doit request
1386 * @ops: requested netlink operation
1387 * @skb: Netlink message with request data
1388 * @info: receiver information
1389 */
batadv_post_doit(const struct genl_split_ops * ops,struct sk_buff * skb,struct genl_info * info)1390 static void batadv_post_doit(const struct genl_split_ops *ops,
1391 struct sk_buff *skb,
1392 struct genl_info *info)
1393 {
1394 struct batadv_hard_iface *hard_iface;
1395 struct batadv_meshif_vlan *vlan;
1396 struct batadv_priv *bat_priv;
1397
1398 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF &&
1399 info->user_ptr[1]) {
1400 hard_iface = info->user_ptr[1];
1401
1402 batadv_hardif_put(hard_iface);
1403 }
1404
1405 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) {
1406 vlan = info->user_ptr[1];
1407 batadv_meshif_vlan_put(vlan);
1408 }
1409
1410 if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) {
1411 bat_priv = info->user_ptr[0];
1412 dev_put(bat_priv->mesh_iface);
1413 }
1414 }
1415
1416 static const struct genl_small_ops batadv_netlink_ops[] = {
1417 {
1418 .cmd = BATADV_CMD_GET_MESH,
1419 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1420 /* can be retrieved by unprivileged users */
1421 .doit = batadv_netlink_get_mesh,
1422 .internal_flags = BATADV_FLAG_NEED_MESH,
1423 },
1424 {
1425 .cmd = BATADV_CMD_TP_METER,
1426 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1427 .flags = GENL_UNS_ADMIN_PERM,
1428 .doit = batadv_netlink_tp_meter_start,
1429 .internal_flags = BATADV_FLAG_NEED_MESH,
1430 },
1431 {
1432 .cmd = BATADV_CMD_TP_METER_CANCEL,
1433 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1434 .flags = GENL_UNS_ADMIN_PERM,
1435 .doit = batadv_netlink_tp_meter_cancel,
1436 .internal_flags = BATADV_FLAG_NEED_MESH,
1437 },
1438 {
1439 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
1440 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1441 .flags = GENL_UNS_ADMIN_PERM,
1442 .dumpit = batadv_algo_dump,
1443 },
1444 {
1445 .cmd = BATADV_CMD_GET_HARDIF,
1446 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1447 /* can be retrieved by unprivileged users */
1448 .dumpit = batadv_netlink_dump_hardif,
1449 .doit = batadv_netlink_cmd_get_hardif,
1450 .internal_flags = BATADV_FLAG_NEED_MESH |
1451 BATADV_FLAG_NEED_HARDIF,
1452 },
1453 {
1454 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
1455 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1456 .flags = GENL_UNS_ADMIN_PERM,
1457 .dumpit = batadv_tt_local_dump,
1458 },
1459 {
1460 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
1461 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1462 .flags = GENL_UNS_ADMIN_PERM,
1463 .dumpit = batadv_tt_global_dump,
1464 },
1465 {
1466 .cmd = BATADV_CMD_GET_ORIGINATORS,
1467 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1468 .flags = GENL_UNS_ADMIN_PERM,
1469 .dumpit = batadv_orig_dump,
1470 },
1471 {
1472 .cmd = BATADV_CMD_GET_NEIGHBORS,
1473 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1474 .flags = GENL_UNS_ADMIN_PERM,
1475 .dumpit = batadv_hardif_neigh_dump,
1476 },
1477 {
1478 .cmd = BATADV_CMD_GET_GATEWAYS,
1479 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1480 .flags = GENL_UNS_ADMIN_PERM,
1481 .dumpit = batadv_gw_dump,
1482 },
1483 {
1484 .cmd = BATADV_CMD_GET_BLA_CLAIM,
1485 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1486 .flags = GENL_UNS_ADMIN_PERM,
1487 .dumpit = batadv_bla_claim_dump,
1488 },
1489 {
1490 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
1491 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1492 .flags = GENL_UNS_ADMIN_PERM,
1493 .dumpit = batadv_bla_backbone_dump,
1494 },
1495 {
1496 .cmd = BATADV_CMD_GET_DAT_CACHE,
1497 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1498 .flags = GENL_UNS_ADMIN_PERM,
1499 .dumpit = batadv_dat_cache_dump,
1500 },
1501 {
1502 .cmd = BATADV_CMD_GET_MCAST_FLAGS,
1503 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1504 .flags = GENL_UNS_ADMIN_PERM,
1505 .dumpit = batadv_mcast_flags_dump,
1506 },
1507 {
1508 .cmd = BATADV_CMD_SET_MESH,
1509 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1510 .flags = GENL_UNS_ADMIN_PERM,
1511 .doit = batadv_netlink_set_mesh,
1512 .internal_flags = BATADV_FLAG_NEED_MESH,
1513 },
1514 {
1515 .cmd = BATADV_CMD_SET_HARDIF,
1516 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1517 .flags = GENL_UNS_ADMIN_PERM,
1518 .doit = batadv_netlink_set_hardif,
1519 .internal_flags = BATADV_FLAG_NEED_MESH |
1520 BATADV_FLAG_NEED_HARDIF,
1521 },
1522 {
1523 .cmd = BATADV_CMD_GET_VLAN,
1524 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1525 /* can be retrieved by unprivileged users */
1526 .doit = batadv_netlink_get_vlan,
1527 .internal_flags = BATADV_FLAG_NEED_MESH |
1528 BATADV_FLAG_NEED_VLAN,
1529 },
1530 {
1531 .cmd = BATADV_CMD_SET_VLAN,
1532 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1533 .flags = GENL_UNS_ADMIN_PERM,
1534 .doit = batadv_netlink_set_vlan,
1535 .internal_flags = BATADV_FLAG_NEED_MESH |
1536 BATADV_FLAG_NEED_VLAN,
1537 },
1538 };
1539
1540 struct genl_family batadv_netlink_family __ro_after_init = {
1541 .hdrsize = 0,
1542 .name = BATADV_NL_NAME,
1543 .version = 1,
1544 .maxattr = BATADV_ATTR_MAX,
1545 .policy = batadv_netlink_policy,
1546 .netnsok = true,
1547 .pre_doit = batadv_pre_doit,
1548 .post_doit = batadv_post_doit,
1549 .module = THIS_MODULE,
1550 .small_ops = batadv_netlink_ops,
1551 .n_small_ops = ARRAY_SIZE(batadv_netlink_ops),
1552 .resv_start_op = BATADV_CMD_SET_VLAN + 1,
1553 .mcgrps = batadv_netlink_mcgrps,
1554 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
1555 };
1556
1557 /**
1558 * batadv_netlink_register() - register batadv genl netlink family
1559 *
1560 * Return: 0 on success or negative error number in case of failure
1561 */
batadv_netlink_register(void)1562 int __init batadv_netlink_register(void)
1563 {
1564 int ret;
1565
1566 ret = genl_register_family(&batadv_netlink_family);
1567 if (ret)
1568 pr_warn("unable to register netlink family\n");
1569
1570 return ret;
1571 }
1572
1573 /**
1574 * batadv_netlink_unregister() - unregister batadv genl netlink family
1575 */
batadv_netlink_unregister(void)1576 void batadv_netlink_unregister(void)
1577 {
1578 genl_unregister_family(&batadv_netlink_family);
1579 }
1580