1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2016-2019 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/atomic.h>
11 #include <linux/bitops.h>
12 #include <linux/bug.h>
13 #include <linux/byteorder/generic.h>
14 #include <linux/cache.h>
15 #include <linux/err.h>
16 #include <linux/errno.h>
17 #include <linux/export.h>
18 #include <linux/genetlink.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/kernel.h>
24 #include <linux/limits.h>
25 #include <linux/list.h>
26 #include <linux/netdevice.h>
27 #include <linux/netlink.h>
28 #include <linux/printk.h>
29 #include <linux/rtnetlink.h>
30 #include <linux/skbuff.h>
31 #include <linux/stddef.h>
32 #include <linux/types.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 "multicast.h"
48 #include "network-coding.h"
49 #include "originator.h"
50 #include "soft-interface.h"
51 #include "tp_meter.h"
52 #include "translation-table.h"
53
54 struct genl_family batadv_netlink_family;
55
56 /* multicast groups */
57 enum batadv_netlink_multicast_groups {
58 BATADV_NL_MCGRP_CONFIG,
59 BATADV_NL_MCGRP_TPMETER,
60 };
61
62 /**
63 * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags
64 */
65 enum batadv_genl_ops_flags {
66 /**
67 * @BATADV_FLAG_NEED_MESH: request requires valid soft interface in
68 * attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be
69 * saved in info->user_ptr[0]
70 */
71 BATADV_FLAG_NEED_MESH = BIT(0),
72
73 /**
74 * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in
75 * attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be
76 * saved in info->user_ptr[1]
77 */
78 BATADV_FLAG_NEED_HARDIF = BIT(1),
79
80 /**
81 * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in
82 * attribute BATADV_ATTR_VLANID and expects a pointer to it to be
83 * saved in info->user_ptr[1]
84 */
85 BATADV_FLAG_NEED_VLAN = BIT(2),
86 };
87
88 static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
89 [BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG },
90 [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
91 };
92
93 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
94 [BATADV_ATTR_VERSION] = { .type = NLA_STRING },
95 [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
96 [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
97 [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
98 [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
99 [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
100 [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
101 [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
102 [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
103 [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
104 [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
105 [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
106 [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
107 [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
108 [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
109 [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
110 [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
111 [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
112 [BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
113 [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
114 [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
115 [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
116 [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
117 [BATADV_ATTR_TQ] = { .type = NLA_U8 },
118 [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
119 [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
120 [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
121 [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
122 [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
123 [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN },
124 [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
125 [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN },
126 [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
127 [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 },
128 [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN },
129 [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 },
130 [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 },
131 [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 },
132 [BATADV_ATTR_VLANID] = { .type = NLA_U16 },
133 [BATADV_ATTR_AGGREGATED_OGMS_ENABLED] = { .type = NLA_U8 },
134 [BATADV_ATTR_AP_ISOLATION_ENABLED] = { .type = NLA_U8 },
135 [BATADV_ATTR_ISOLATION_MARK] = { .type = NLA_U32 },
136 [BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 },
137 [BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 },
138 [BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 },
139 [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 },
140 [BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 },
141 [BATADV_ATTR_GW_BANDWIDTH_DOWN] = { .type = NLA_U32 },
142 [BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 },
143 [BATADV_ATTR_GW_MODE] = { .type = NLA_U8 },
144 [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 },
145 [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 },
146 [BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 },
147 [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 },
148 [BATADV_ATTR_MULTICAST_FANOUT] = { .type = NLA_U32 },
149 [BATADV_ATTR_NETWORK_CODING_ENABLED] = { .type = NLA_U8 },
150 [BATADV_ATTR_ORIG_INTERVAL] = { .type = NLA_U32 },
151 [BATADV_ATTR_ELP_INTERVAL] = { .type = NLA_U32 },
152 [BATADV_ATTR_THROUGHPUT_OVERRIDE] = { .type = NLA_U32 },
153 };
154
155 /**
156 * batadv_netlink_get_ifindex() - Extract an interface index from a message
157 * @nlh: Message header
158 * @attrtype: Attribute which holds an interface index
159 *
160 * Return: interface index, or 0.
161 */
162 int
batadv_netlink_get_ifindex(const struct nlmsghdr * nlh,int attrtype)163 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
164 {
165 struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
166
167 return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
168 }
169
170 /**
171 * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation softif attribute
172 * @msg: Netlink message to dump into
173 * @bat_priv: the bat priv with all the soft interface information
174 *
175 * Return: 0 on success or negative error number in case of failure
176 */
batadv_netlink_mesh_fill_ap_isolation(struct sk_buff * msg,struct batadv_priv * bat_priv)177 static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg,
178 struct batadv_priv *bat_priv)
179 {
180 struct batadv_softif_vlan *vlan;
181 u8 ap_isolation;
182
183 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
184 if (!vlan)
185 return 0;
186
187 ap_isolation = atomic_read(&vlan->ap_isolation);
188 batadv_softif_vlan_put(vlan);
189
190 return nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
191 !!ap_isolation);
192 }
193
194 /**
195 * batadv_option_set_ap_isolation() - Set ap_isolation from genl msg
196 * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute
197 * @bat_priv: the bat priv with all the soft interface information
198 *
199 * Return: 0 on success or negative error number in case of failure
200 */
batadv_netlink_set_mesh_ap_isolation(struct nlattr * attr,struct batadv_priv * bat_priv)201 static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr,
202 struct batadv_priv *bat_priv)
203 {
204 struct batadv_softif_vlan *vlan;
205
206 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
207 if (!vlan)
208 return -ENOENT;
209
210 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
211 batadv_softif_vlan_put(vlan);
212
213 return 0;
214 }
215
216 /**
217 * batadv_netlink_mesh_fill() - Fill message with mesh attributes
218 * @msg: Netlink message to dump into
219 * @bat_priv: the bat priv with all the soft interface information
220 * @cmd: type of message to generate
221 * @portid: Port making netlink request
222 * @seq: sequence number for message
223 * @flags: Additional flags for message
224 *
225 * Return: 0 on success or negative error number in case of failure
226 */
batadv_netlink_mesh_fill(struct sk_buff * msg,struct batadv_priv * bat_priv,enum batadv_nl_commands cmd,u32 portid,u32 seq,int flags)227 static int batadv_netlink_mesh_fill(struct sk_buff *msg,
228 struct batadv_priv *bat_priv,
229 enum batadv_nl_commands cmd,
230 u32 portid, u32 seq, int flags)
231 {
232 struct net_device *soft_iface = bat_priv->soft_iface;
233 struct batadv_hard_iface *primary_if = NULL;
234 struct net_device *hard_iface;
235 void *hdr;
236
237 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
238 if (!hdr)
239 return -ENOBUFS;
240
241 if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
242 nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
243 bat_priv->algo_ops->name) ||
244 nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
245 nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
246 nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
247 soft_iface->dev_addr) ||
248 nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
249 (u8)atomic_read(&bat_priv->tt.vn)))
250 goto nla_put_failure;
251
252 #ifdef CONFIG_BATMAN_ADV_BLA
253 if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
254 ntohs(bat_priv->bla.claim_dest.group)))
255 goto nla_put_failure;
256 #endif
257
258 if (batadv_mcast_mesh_info_put(msg, bat_priv))
259 goto nla_put_failure;
260
261 primary_if = batadv_primary_if_get_selected(bat_priv);
262 if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
263 hard_iface = primary_if->net_dev;
264
265 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
266 hard_iface->ifindex) ||
267 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
268 hard_iface->name) ||
269 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
270 hard_iface->dev_addr))
271 goto nla_put_failure;
272 }
273
274 if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS_ENABLED,
275 !!atomic_read(&bat_priv->aggregated_ogms)))
276 goto nla_put_failure;
277
278 if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv))
279 goto nla_put_failure;
280
281 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MARK,
282 bat_priv->isolation_mark))
283 goto nla_put_failure;
284
285 if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MASK,
286 bat_priv->isolation_mark_mask))
287 goto nla_put_failure;
288
289 if (nla_put_u8(msg, BATADV_ATTR_BONDING_ENABLED,
290 !!atomic_read(&bat_priv->bonding)))
291 goto nla_put_failure;
292
293 #ifdef CONFIG_BATMAN_ADV_BLA
294 if (nla_put_u8(msg, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
295 !!atomic_read(&bat_priv->bridge_loop_avoidance)))
296 goto nla_put_failure;
297 #endif /* CONFIG_BATMAN_ADV_BLA */
298
299 #ifdef CONFIG_BATMAN_ADV_DAT
300 if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
301 !!atomic_read(&bat_priv->distributed_arp_table)))
302 goto nla_put_failure;
303 #endif /* CONFIG_BATMAN_ADV_DAT */
304
305 if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED,
306 !!atomic_read(&bat_priv->fragmentation)))
307 goto nla_put_failure;
308
309 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_DOWN,
310 atomic_read(&bat_priv->gw.bandwidth_down)))
311 goto nla_put_failure;
312
313 if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_UP,
314 atomic_read(&bat_priv->gw.bandwidth_up)))
315 goto nla_put_failure;
316
317 if (nla_put_u8(msg, BATADV_ATTR_GW_MODE,
318 atomic_read(&bat_priv->gw.mode)))
319 goto nla_put_failure;
320
321 if (bat_priv->algo_ops->gw.get_best_gw_node &&
322 bat_priv->algo_ops->gw.is_eligible) {
323 /* GW selection class is not available if the routing algorithm
324 * in use does not implement the GW API
325 */
326 if (nla_put_u32(msg, BATADV_ATTR_GW_SEL_CLASS,
327 atomic_read(&bat_priv->gw.sel_class)))
328 goto nla_put_failure;
329 }
330
331 if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
332 atomic_read(&bat_priv->hop_penalty)))
333 goto nla_put_failure;
334
335 #ifdef CONFIG_BATMAN_ADV_DEBUG
336 if (nla_put_u32(msg, BATADV_ATTR_LOG_LEVEL,
337 atomic_read(&bat_priv->log_level)))
338 goto nla_put_failure;
339 #endif /* CONFIG_BATMAN_ADV_DEBUG */
340
341 #ifdef CONFIG_BATMAN_ADV_MCAST
342 if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
343 !atomic_read(&bat_priv->multicast_mode)))
344 goto nla_put_failure;
345
346 if (nla_put_u32(msg, BATADV_ATTR_MULTICAST_FANOUT,
347 atomic_read(&bat_priv->multicast_fanout)))
348 goto nla_put_failure;
349 #endif /* CONFIG_BATMAN_ADV_MCAST */
350
351 #ifdef CONFIG_BATMAN_ADV_NC
352 if (nla_put_u8(msg, BATADV_ATTR_NETWORK_CODING_ENABLED,
353 !!atomic_read(&bat_priv->network_coding)))
354 goto nla_put_failure;
355 #endif /* CONFIG_BATMAN_ADV_NC */
356
357 if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL,
358 atomic_read(&bat_priv->orig_interval)))
359 goto nla_put_failure;
360
361 if (primary_if)
362 batadv_hardif_put(primary_if);
363
364 genlmsg_end(msg, hdr);
365 return 0;
366
367 nla_put_failure:
368 if (primary_if)
369 batadv_hardif_put(primary_if);
370
371 genlmsg_cancel(msg, hdr);
372 return -EMSGSIZE;
373 }
374
375 /**
376 * batadv_netlink_notify_mesh() - send softif attributes to listener
377 * @bat_priv: the bat priv with all the soft interface information
378 *
379 * Return: 0 on success, < 0 on error
380 */
batadv_netlink_notify_mesh(struct batadv_priv * bat_priv)381 int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
382 {
383 struct sk_buff *msg;
384 int ret;
385
386 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
387 if (!msg)
388 return -ENOMEM;
389
390 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH,
391 0, 0, 0);
392 if (ret < 0) {
393 nlmsg_free(msg);
394 return ret;
395 }
396
397 genlmsg_multicast_netns(&batadv_netlink_family,
398 dev_net(bat_priv->soft_iface), msg, 0,
399 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
400
401 return 0;
402 }
403
404 /**
405 * batadv_netlink_get_mesh() - Get softif attributes
406 * @skb: Netlink message with request data
407 * @info: receiver information
408 *
409 * Return: 0 on success or negative error number in case of failure
410 */
batadv_netlink_get_mesh(struct sk_buff * skb,struct genl_info * info)411 static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info)
412 {
413 struct batadv_priv *bat_priv = info->user_ptr[0];
414 struct sk_buff *msg;
415 int ret;
416
417 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
418 if (!msg)
419 return -ENOMEM;
420
421 ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH,
422 info->snd_portid, info->snd_seq, 0);
423 if (ret < 0) {
424 nlmsg_free(msg);
425 return ret;
426 }
427
428 ret = genlmsg_reply(msg, info);
429
430 return ret;
431 }
432
433 /**
434 * batadv_netlink_set_mesh() - Set softif attributes
435 * @skb: Netlink message with request data
436 * @info: receiver information
437 *
438 * Return: 0 on success or negative error number in case of failure
439 */
batadv_netlink_set_mesh(struct sk_buff * skb,struct genl_info * info)440 static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
441 {
442 struct batadv_priv *bat_priv = info->user_ptr[0];
443 struct nlattr *attr;
444
445 if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) {
446 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED];
447
448 atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr));
449 }
450
451 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
452 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
453
454 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv);
455 }
456
457 if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) {
458 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK];
459
460 bat_priv->isolation_mark = nla_get_u32(attr);
461 }
462
463 if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) {
464 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK];
465
466 bat_priv->isolation_mark_mask = nla_get_u32(attr);
467 }
468
469 if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) {
470 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED];
471
472 atomic_set(&bat_priv->bonding, !!nla_get_u8(attr));
473 }
474
475 #ifdef CONFIG_BATMAN_ADV_BLA
476 if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) {
477 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED];
478
479 atomic_set(&bat_priv->bridge_loop_avoidance,
480 !!nla_get_u8(attr));
481 batadv_bla_status_update(bat_priv->soft_iface);
482 }
483 #endif /* CONFIG_BATMAN_ADV_BLA */
484
485 #ifdef CONFIG_BATMAN_ADV_DAT
486 if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
487 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
488
489 atomic_set(&bat_priv->distributed_arp_table,
490 !!nla_get_u8(attr));
491 batadv_dat_status_update(bat_priv->soft_iface);
492 }
493 #endif /* CONFIG_BATMAN_ADV_DAT */
494
495 if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
496 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
497
498 atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr));
499 batadv_update_min_mtu(bat_priv->soft_iface);
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 = 0xffffffffu;
553 u32 sel_class;
554
555 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
556 sel_class = nla_get_u32(attr);
557
558 if (!bat_priv->algo_ops->gw.store_sel_class)
559 sel_class_max = BATADV_TQ_MAX_VALUE;
560
561 if (sel_class >= 1 && sel_class <= sel_class_max) {
562 atomic_set(&bat_priv->gw.sel_class, sel_class);
563 batadv_gw_reselect(bat_priv);
564 }
565 }
566
567 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
568 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
569
570 atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr));
571 }
572
573 #ifdef CONFIG_BATMAN_ADV_DEBUG
574 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) {
575 attr = info->attrs[BATADV_ATTR_LOG_LEVEL];
576
577 atomic_set(&bat_priv->log_level,
578 nla_get_u32(attr) & BATADV_DBG_ALL);
579 }
580 #endif /* CONFIG_BATMAN_ADV_DEBUG */
581
582 #ifdef CONFIG_BATMAN_ADV_MCAST
583 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) {
584 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
585
586 atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr));
587 }
588
589 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) {
590 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT];
591
592 atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr));
593 }
594 #endif /* CONFIG_BATMAN_ADV_MCAST */
595
596 #ifdef CONFIG_BATMAN_ADV_NC
597 if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) {
598 attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED];
599
600 atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr));
601 batadv_nc_status_update(bat_priv->soft_iface);
602 }
603 #endif /* CONFIG_BATMAN_ADV_NC */
604
605 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
606 u32 orig_interval;
607
608 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
609 orig_interval = nla_get_u32(attr);
610
611 orig_interval = min_t(u32, orig_interval, INT_MAX);
612 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
613
614 atomic_set(&bat_priv->orig_interval, orig_interval);
615 }
616
617 batadv_netlink_notify_mesh(bat_priv);
618
619 return 0;
620 }
621
622 /**
623 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
624 * @msg: netlink message to be sent back
625 * @cookie: tp meter session cookie
626 *
627 * Return: 0 on success, < 0 on error
628 */
629 static int
batadv_netlink_tp_meter_put(struct sk_buff * msg,u32 cookie)630 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
631 {
632 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
633 return -ENOBUFS;
634
635 return 0;
636 }
637
638 /**
639 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
640 * @bat_priv: the bat priv with all the soft interface information
641 * @dst: destination of tp_meter session
642 * @result: reason for tp meter session stop
643 * @test_time: total time ot the tp_meter session
644 * @total_bytes: bytes acked to the receiver
645 * @cookie: cookie of tp_meter session
646 *
647 * Return: 0 on success, < 0 on error
648 */
batadv_netlink_tpmeter_notify(struct batadv_priv * bat_priv,const u8 * dst,u8 result,u32 test_time,u64 total_bytes,u32 cookie)649 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
650 u8 result, u32 test_time, u64 total_bytes,
651 u32 cookie)
652 {
653 struct sk_buff *msg;
654 void *hdr;
655 int ret;
656
657 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
658 if (!msg)
659 return -ENOMEM;
660
661 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
662 BATADV_CMD_TP_METER);
663 if (!hdr) {
664 ret = -ENOBUFS;
665 goto err_genlmsg;
666 }
667
668 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
669 goto nla_put_failure;
670
671 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
672 goto nla_put_failure;
673
674 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
675 BATADV_ATTR_PAD))
676 goto nla_put_failure;
677
678 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
679 goto nla_put_failure;
680
681 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
682 goto nla_put_failure;
683
684 genlmsg_end(msg, hdr);
685
686 genlmsg_multicast_netns(&batadv_netlink_family,
687 dev_net(bat_priv->soft_iface), msg, 0,
688 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
689
690 return 0;
691
692 nla_put_failure:
693 genlmsg_cancel(msg, hdr);
694 ret = -EMSGSIZE;
695
696 err_genlmsg:
697 nlmsg_free(msg);
698 return ret;
699 }
700
701 /**
702 * batadv_netlink_tp_meter_start() - Start a new tp_meter session
703 * @skb: received netlink message
704 * @info: receiver information
705 *
706 * Return: 0 on success, < 0 on error
707 */
708 static int
batadv_netlink_tp_meter_start(struct sk_buff * skb,struct genl_info * info)709 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
710 {
711 struct batadv_priv *bat_priv = info->user_ptr[0];
712 struct sk_buff *msg = NULL;
713 u32 test_length;
714 void *msg_head;
715 u32 cookie;
716 u8 *dst;
717 int ret;
718
719 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
720 return -EINVAL;
721
722 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
723 return -EINVAL;
724
725 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
726
727 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
728
729 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
730 if (!msg) {
731 ret = -ENOMEM;
732 goto out;
733 }
734
735 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
736 &batadv_netlink_family, 0,
737 BATADV_CMD_TP_METER);
738 if (!msg_head) {
739 ret = -ENOBUFS;
740 goto out;
741 }
742
743 batadv_tp_start(bat_priv, dst, test_length, &cookie);
744
745 ret = batadv_netlink_tp_meter_put(msg, cookie);
746
747 out:
748 if (ret) {
749 if (msg)
750 nlmsg_free(msg);
751 return ret;
752 }
753
754 genlmsg_end(msg, msg_head);
755 return genlmsg_reply(msg, info);
756 }
757
758 /**
759 * batadv_netlink_tp_meter_start() - Cancel a running tp_meter session
760 * @skb: received netlink message
761 * @info: receiver information
762 *
763 * Return: 0 on success, < 0 on error
764 */
765 static int
batadv_netlink_tp_meter_cancel(struct sk_buff * skb,struct genl_info * info)766 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
767 {
768 struct batadv_priv *bat_priv = info->user_ptr[0];
769 u8 *dst;
770 int ret = 0;
771
772 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
773 return -EINVAL;
774
775 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
776
777 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
778
779 return ret;
780 }
781
782 /**
783 * batadv_netlink_hardif_fill() - Fill message with hardif attributes
784 * @msg: Netlink message to dump into
785 * @bat_priv: the bat priv with all the soft interface information
786 * @hard_iface: hard interface which was modified
787 * @cmd: type of message to generate
788 * @portid: Port making netlink request
789 * @seq: sequence number for message
790 * @flags: Additional flags for message
791 * @cb: Control block containing additional options
792 *
793 * Return: 0 on success or negative error number in case of failure
794 */
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)795 static int batadv_netlink_hardif_fill(struct sk_buff *msg,
796 struct batadv_priv *bat_priv,
797 struct batadv_hard_iface *hard_iface,
798 enum batadv_nl_commands cmd,
799 u32 portid, u32 seq, int flags,
800 struct netlink_callback *cb)
801 {
802 struct net_device *net_dev = hard_iface->net_dev;
803 void *hdr;
804
805 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
806 if (!hdr)
807 return -ENOBUFS;
808
809 if (cb)
810 genl_dump_check_consistent(cb, hdr);
811
812 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
813 bat_priv->soft_iface->ifindex))
814 goto nla_put_failure;
815
816 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
817 net_dev->ifindex) ||
818 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
819 net_dev->name) ||
820 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
821 net_dev->dev_addr))
822 goto nla_put_failure;
823
824 if (hard_iface->if_status == BATADV_IF_ACTIVE) {
825 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
826 goto nla_put_failure;
827 }
828
829 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
830 if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL,
831 atomic_read(&hard_iface->bat_v.elp_interval)))
832 goto nla_put_failure;
833
834 if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE,
835 atomic_read(&hard_iface->bat_v.throughput_override)))
836 goto nla_put_failure;
837 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
838
839 genlmsg_end(msg, hdr);
840 return 0;
841
842 nla_put_failure:
843 genlmsg_cancel(msg, hdr);
844 return -EMSGSIZE;
845 }
846
847 /**
848 * batadv_netlink_notify_hardif() - send hardif attributes to listener
849 * @bat_priv: the bat priv with all the soft interface information
850 * @hard_iface: hard interface which was modified
851 *
852 * Return: 0 on success, < 0 on error
853 */
batadv_netlink_notify_hardif(struct batadv_priv * bat_priv,struct batadv_hard_iface * hard_iface)854 int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
855 struct batadv_hard_iface *hard_iface)
856 {
857 struct sk_buff *msg;
858 int ret;
859
860 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
861 if (!msg)
862 return -ENOMEM;
863
864 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
865 BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL);
866 if (ret < 0) {
867 nlmsg_free(msg);
868 return ret;
869 }
870
871 genlmsg_multicast_netns(&batadv_netlink_family,
872 dev_net(bat_priv->soft_iface), msg, 0,
873 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
874
875 return 0;
876 }
877
878 /**
879 * batadv_netlink_get_hardif() - Get hardif attributes
880 * @skb: Netlink message with request data
881 * @info: receiver information
882 *
883 * Return: 0 on success or negative error number in case of failure
884 */
batadv_netlink_get_hardif(struct sk_buff * skb,struct genl_info * info)885 static int batadv_netlink_get_hardif(struct sk_buff *skb,
886 struct genl_info *info)
887 {
888 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
889 struct batadv_priv *bat_priv = info->user_ptr[0];
890 struct sk_buff *msg;
891 int ret;
892
893 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
894 if (!msg)
895 return -ENOMEM;
896
897 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
898 BATADV_CMD_GET_HARDIF,
899 info->snd_portid, info->snd_seq, 0,
900 NULL);
901 if (ret < 0) {
902 nlmsg_free(msg);
903 return ret;
904 }
905
906 ret = genlmsg_reply(msg, info);
907
908 return ret;
909 }
910
911 /**
912 * batadv_netlink_set_hardif() - Set hardif attributes
913 * @skb: Netlink message with request data
914 * @info: receiver information
915 *
916 * Return: 0 on success or negative error number in case of failure
917 */
batadv_netlink_set_hardif(struct sk_buff * skb,struct genl_info * info)918 static int batadv_netlink_set_hardif(struct sk_buff *skb,
919 struct genl_info *info)
920 {
921 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
922 struct batadv_priv *bat_priv = info->user_ptr[0];
923
924 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
925 struct nlattr *attr;
926
927 if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) {
928 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL];
929
930 atomic_set(&hard_iface->bat_v.elp_interval, nla_get_u32(attr));
931 }
932
933 if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) {
934 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE];
935
936 atomic_set(&hard_iface->bat_v.throughput_override,
937 nla_get_u32(attr));
938 }
939 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
940
941 batadv_netlink_notify_hardif(bat_priv, hard_iface);
942
943 return 0;
944 }
945
946 /**
947 * batadv_netlink_dump_hardif() - Dump all hard interface into a messages
948 * @msg: Netlink message to dump into
949 * @cb: Parameters from query
950 *
951 * Return: error code, or length of reply message on success
952 */
953 static int
batadv_netlink_dump_hardif(struct sk_buff * msg,struct netlink_callback * cb)954 batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb)
955 {
956 struct net *net = sock_net(cb->skb->sk);
957 struct net_device *soft_iface;
958 struct batadv_hard_iface *hard_iface;
959 struct batadv_priv *bat_priv;
960 int ifindex;
961 int portid = NETLINK_CB(cb->skb).portid;
962 int skip = cb->args[0];
963 int i = 0;
964
965 ifindex = batadv_netlink_get_ifindex(cb->nlh,
966 BATADV_ATTR_MESH_IFINDEX);
967 if (!ifindex)
968 return -EINVAL;
969
970 soft_iface = dev_get_by_index(net, ifindex);
971 if (!soft_iface)
972 return -ENODEV;
973
974 if (!batadv_softif_is_valid(soft_iface)) {
975 dev_put(soft_iface);
976 return -ENODEV;
977 }
978
979 bat_priv = netdev_priv(soft_iface);
980
981 rtnl_lock();
982 cb->seq = batadv_hardif_generation << 1 | 1;
983
984 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
985 if (hard_iface->soft_iface != soft_iface)
986 continue;
987
988 if (i++ < skip)
989 continue;
990
991 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
992 BATADV_CMD_GET_HARDIF,
993 portid, cb->nlh->nlmsg_seq,
994 NLM_F_MULTI, cb)) {
995 i--;
996 break;
997 }
998 }
999
1000 rtnl_unlock();
1001
1002 dev_put(soft_iface);
1003
1004 cb->args[0] = i;
1005
1006 return msg->len;
1007 }
1008
1009 /**
1010 * batadv_netlink_vlan_fill() - Fill message with vlan attributes
1011 * @msg: Netlink message to dump into
1012 * @bat_priv: the bat priv with all the soft interface information
1013 * @vlan: vlan which was modified
1014 * @cmd: type of message to generate
1015 * @portid: Port making netlink request
1016 * @seq: sequence number for message
1017 * @flags: Additional flags for message
1018 *
1019 * Return: 0 on success or negative error number in case of failure
1020 */
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)1021 static int batadv_netlink_vlan_fill(struct sk_buff *msg,
1022 struct batadv_priv *bat_priv,
1023 struct batadv_softif_vlan *vlan,
1024 enum batadv_nl_commands cmd,
1025 u32 portid, u32 seq, int flags)
1026 {
1027 void *hdr;
1028
1029 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
1030 if (!hdr)
1031 return -ENOBUFS;
1032
1033 if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
1034 bat_priv->soft_iface->ifindex))
1035 goto nla_put_failure;
1036
1037 if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK))
1038 goto nla_put_failure;
1039
1040 if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
1041 !!atomic_read(&vlan->ap_isolation)))
1042 goto nla_put_failure;
1043
1044 genlmsg_end(msg, hdr);
1045 return 0;
1046
1047 nla_put_failure:
1048 genlmsg_cancel(msg, hdr);
1049 return -EMSGSIZE;
1050 }
1051
1052 /**
1053 * batadv_netlink_notify_vlan() - send vlan attributes to listener
1054 * @bat_priv: the bat priv with all the soft interface information
1055 * @vlan: vlan which was modified
1056 *
1057 * Return: 0 on success, < 0 on error
1058 */
batadv_netlink_notify_vlan(struct batadv_priv * bat_priv,struct batadv_softif_vlan * vlan)1059 int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
1060 struct batadv_softif_vlan *vlan)
1061 {
1062 struct sk_buff *msg;
1063 int ret;
1064
1065 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1066 if (!msg)
1067 return -ENOMEM;
1068
1069 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan,
1070 BATADV_CMD_SET_VLAN, 0, 0, 0);
1071 if (ret < 0) {
1072 nlmsg_free(msg);
1073 return ret;
1074 }
1075
1076 genlmsg_multicast_netns(&batadv_netlink_family,
1077 dev_net(bat_priv->soft_iface), msg, 0,
1078 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
1079
1080 return 0;
1081 }
1082
1083 /**
1084 * batadv_netlink_get_vlan() - Get vlan attributes
1085 * @skb: Netlink message with request data
1086 * @info: receiver information
1087 *
1088 * Return: 0 on success or negative error number in case of failure
1089 */
batadv_netlink_get_vlan(struct sk_buff * skb,struct genl_info * info)1090 static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info)
1091 {
1092 struct batadv_softif_vlan *vlan = info->user_ptr[1];
1093 struct batadv_priv *bat_priv = info->user_ptr[0];
1094 struct sk_buff *msg;
1095 int ret;
1096
1097 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1098 if (!msg)
1099 return -ENOMEM;
1100
1101 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN,
1102 info->snd_portid, info->snd_seq, 0);
1103 if (ret < 0) {
1104 nlmsg_free(msg);
1105 return ret;
1106 }
1107
1108 ret = genlmsg_reply(msg, info);
1109
1110 return ret;
1111 }
1112
1113 /**
1114 * batadv_netlink_set_vlan() - Get vlan attributes
1115 * @skb: Netlink message with request data
1116 * @info: receiver information
1117 *
1118 * Return: 0 on success or negative error number in case of failure
1119 */
batadv_netlink_set_vlan(struct sk_buff * skb,struct genl_info * info)1120 static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info)
1121 {
1122 struct batadv_softif_vlan *vlan = info->user_ptr[1];
1123 struct batadv_priv *bat_priv = info->user_ptr[0];
1124 struct nlattr *attr;
1125
1126 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
1127 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
1128
1129 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
1130 }
1131
1132 batadv_netlink_notify_vlan(bat_priv, vlan);
1133
1134 return 0;
1135 }
1136
1137 /**
1138 * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes
1139 * @net: the applicable net namespace
1140 * @info: receiver information
1141 *
1142 * Return: Pointer to soft interface (with increased refcnt) on success, error
1143 * pointer on error
1144 */
1145 static struct net_device *
batadv_get_softif_from_info(struct net * net,struct genl_info * info)1146 batadv_get_softif_from_info(struct net *net, struct genl_info *info)
1147 {
1148 struct net_device *soft_iface;
1149 int ifindex;
1150
1151 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
1152 return ERR_PTR(-EINVAL);
1153
1154 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
1155
1156 soft_iface = dev_get_by_index(net, ifindex);
1157 if (!soft_iface)
1158 return ERR_PTR(-ENODEV);
1159
1160 if (!batadv_softif_is_valid(soft_iface))
1161 goto err_put_softif;
1162
1163 return soft_iface;
1164
1165 err_put_softif:
1166 dev_put(soft_iface);
1167
1168 return ERR_PTR(-EINVAL);
1169 }
1170
1171 /**
1172 * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes
1173 * @bat_priv: the bat priv with all the soft interface information
1174 * @net: the applicable net namespace
1175 * @info: receiver information
1176 *
1177 * Return: Pointer to hard interface (with increased refcnt) on success, error
1178 * pointer on error
1179 */
1180 static struct batadv_hard_iface *
batadv_get_hardif_from_info(struct batadv_priv * bat_priv,struct net * net,struct genl_info * info)1181 batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net,
1182 struct genl_info *info)
1183 {
1184 struct batadv_hard_iface *hard_iface;
1185 struct net_device *hard_dev;
1186 unsigned int hardif_index;
1187
1188 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX])
1189 return ERR_PTR(-EINVAL);
1190
1191 hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]);
1192
1193 hard_dev = dev_get_by_index(net, hardif_index);
1194 if (!hard_dev)
1195 return ERR_PTR(-ENODEV);
1196
1197 hard_iface = batadv_hardif_get_by_netdev(hard_dev);
1198 if (!hard_iface)
1199 goto err_put_harddev;
1200
1201 if (hard_iface->soft_iface != bat_priv->soft_iface)
1202 goto err_put_hardif;
1203
1204 /* hard_dev is referenced by hard_iface and not needed here */
1205 dev_put(hard_dev);
1206
1207 return hard_iface;
1208
1209 err_put_hardif:
1210 batadv_hardif_put(hard_iface);
1211 err_put_harddev:
1212 dev_put(hard_dev);
1213
1214 return ERR_PTR(-EINVAL);
1215 }
1216
1217 /**
1218 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes
1219 * @bat_priv: the bat priv with all the soft interface information
1220 * @net: the applicable net namespace
1221 * @info: receiver information
1222 *
1223 * Return: Pointer to vlan on success (with increased refcnt), error pointer
1224 * on error
1225 */
1226 static struct batadv_softif_vlan *
batadv_get_vlan_from_info(struct batadv_priv * bat_priv,struct net * net,struct genl_info * info)1227 batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net,
1228 struct genl_info *info)
1229 {
1230 struct batadv_softif_vlan *vlan;
1231 u16 vid;
1232
1233 if (!info->attrs[BATADV_ATTR_VLANID])
1234 return ERR_PTR(-EINVAL);
1235
1236 vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]);
1237
1238 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
1239 if (!vlan)
1240 return ERR_PTR(-ENOENT);
1241
1242 return vlan;
1243 }
1244
1245 /**
1246 * batadv_pre_doit() - Prepare batman-adv genl doit request
1247 * @ops: requested netlink operation
1248 * @skb: Netlink message with request data
1249 * @info: receiver information
1250 *
1251 * Return: 0 on success or negative error number in case of failure
1252 */
batadv_pre_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)1253 static int batadv_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
1254 struct genl_info *info)
1255 {
1256 struct net *net = genl_info_net(info);
1257 struct batadv_hard_iface *hard_iface;
1258 struct batadv_priv *bat_priv = NULL;
1259 struct batadv_softif_vlan *vlan;
1260 struct net_device *soft_iface;
1261 u8 user_ptr1_flags;
1262 u8 mesh_dep_flags;
1263 int ret;
1264
1265 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1266 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1))
1267 return -EINVAL;
1268
1269 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1270 if (WARN_ON((ops->internal_flags & mesh_dep_flags) &&
1271 (~ops->internal_flags & BATADV_FLAG_NEED_MESH)))
1272 return -EINVAL;
1273
1274 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) {
1275 soft_iface = batadv_get_softif_from_info(net, info);
1276 if (IS_ERR(soft_iface))
1277 return PTR_ERR(soft_iface);
1278
1279 bat_priv = netdev_priv(soft_iface);
1280 info->user_ptr[0] = bat_priv;
1281 }
1282
1283 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) {
1284 hard_iface = batadv_get_hardif_from_info(bat_priv, net, info);
1285 if (IS_ERR(hard_iface)) {
1286 ret = PTR_ERR(hard_iface);
1287 goto err_put_softif;
1288 }
1289
1290 info->user_ptr[1] = hard_iface;
1291 }
1292
1293 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) {
1294 vlan = batadv_get_vlan_from_info(bat_priv, net, info);
1295 if (IS_ERR(vlan)) {
1296 ret = PTR_ERR(vlan);
1297 goto err_put_softif;
1298 }
1299
1300 info->user_ptr[1] = vlan;
1301 }
1302
1303 return 0;
1304
1305 err_put_softif:
1306 if (bat_priv)
1307 dev_put(bat_priv->soft_iface);
1308
1309 return ret;
1310 }
1311
1312 /**
1313 * batadv_post_doit() - End batman-adv genl doit request
1314 * @ops: requested netlink operation
1315 * @skb: Netlink message with request data
1316 * @info: receiver information
1317 */
batadv_post_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)1318 static void batadv_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
1319 struct genl_info *info)
1320 {
1321 struct batadv_hard_iface *hard_iface;
1322 struct batadv_softif_vlan *vlan;
1323 struct batadv_priv *bat_priv;
1324
1325 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF &&
1326 info->user_ptr[1]) {
1327 hard_iface = info->user_ptr[1];
1328
1329 batadv_hardif_put(hard_iface);
1330 }
1331
1332 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) {
1333 vlan = info->user_ptr[1];
1334 batadv_softif_vlan_put(vlan);
1335 }
1336
1337 if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) {
1338 bat_priv = info->user_ptr[0];
1339 dev_put(bat_priv->soft_iface);
1340 }
1341 }
1342
1343 static const struct genl_ops batadv_netlink_ops[] = {
1344 {
1345 .cmd = BATADV_CMD_GET_MESH,
1346 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1347 /* can be retrieved by unprivileged users */
1348 .doit = batadv_netlink_get_mesh,
1349 .internal_flags = BATADV_FLAG_NEED_MESH,
1350 },
1351 {
1352 .cmd = BATADV_CMD_TP_METER,
1353 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1354 .flags = GENL_ADMIN_PERM,
1355 .doit = batadv_netlink_tp_meter_start,
1356 .internal_flags = BATADV_FLAG_NEED_MESH,
1357 },
1358 {
1359 .cmd = BATADV_CMD_TP_METER_CANCEL,
1360 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1361 .flags = GENL_ADMIN_PERM,
1362 .doit = batadv_netlink_tp_meter_cancel,
1363 .internal_flags = BATADV_FLAG_NEED_MESH,
1364 },
1365 {
1366 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
1367 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1368 .flags = GENL_ADMIN_PERM,
1369 .dumpit = batadv_algo_dump,
1370 },
1371 {
1372 .cmd = BATADV_CMD_GET_HARDIF,
1373 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1374 /* can be retrieved by unprivileged users */
1375 .dumpit = batadv_netlink_dump_hardif,
1376 .doit = batadv_netlink_get_hardif,
1377 .internal_flags = BATADV_FLAG_NEED_MESH |
1378 BATADV_FLAG_NEED_HARDIF,
1379 },
1380 {
1381 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
1382 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1383 .flags = GENL_ADMIN_PERM,
1384 .dumpit = batadv_tt_local_dump,
1385 },
1386 {
1387 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
1388 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1389 .flags = GENL_ADMIN_PERM,
1390 .dumpit = batadv_tt_global_dump,
1391 },
1392 {
1393 .cmd = BATADV_CMD_GET_ORIGINATORS,
1394 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1395 .flags = GENL_ADMIN_PERM,
1396 .dumpit = batadv_orig_dump,
1397 },
1398 {
1399 .cmd = BATADV_CMD_GET_NEIGHBORS,
1400 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1401 .flags = GENL_ADMIN_PERM,
1402 .dumpit = batadv_hardif_neigh_dump,
1403 },
1404 {
1405 .cmd = BATADV_CMD_GET_GATEWAYS,
1406 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1407 .flags = GENL_ADMIN_PERM,
1408 .dumpit = batadv_gw_dump,
1409 },
1410 {
1411 .cmd = BATADV_CMD_GET_BLA_CLAIM,
1412 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1413 .flags = GENL_ADMIN_PERM,
1414 .dumpit = batadv_bla_claim_dump,
1415 },
1416 {
1417 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
1418 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1419 .flags = GENL_ADMIN_PERM,
1420 .dumpit = batadv_bla_backbone_dump,
1421 },
1422 {
1423 .cmd = BATADV_CMD_GET_DAT_CACHE,
1424 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1425 .flags = GENL_ADMIN_PERM,
1426 .dumpit = batadv_dat_cache_dump,
1427 },
1428 {
1429 .cmd = BATADV_CMD_GET_MCAST_FLAGS,
1430 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1431 .flags = GENL_ADMIN_PERM,
1432 .dumpit = batadv_mcast_flags_dump,
1433 },
1434 {
1435 .cmd = BATADV_CMD_SET_MESH,
1436 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1437 .flags = GENL_ADMIN_PERM,
1438 .doit = batadv_netlink_set_mesh,
1439 .internal_flags = BATADV_FLAG_NEED_MESH,
1440 },
1441 {
1442 .cmd = BATADV_CMD_SET_HARDIF,
1443 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1444 .flags = GENL_ADMIN_PERM,
1445 .doit = batadv_netlink_set_hardif,
1446 .internal_flags = BATADV_FLAG_NEED_MESH |
1447 BATADV_FLAG_NEED_HARDIF,
1448 },
1449 {
1450 .cmd = BATADV_CMD_GET_VLAN,
1451 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1452 /* can be retrieved by unprivileged users */
1453 .doit = batadv_netlink_get_vlan,
1454 .internal_flags = BATADV_FLAG_NEED_MESH |
1455 BATADV_FLAG_NEED_VLAN,
1456 },
1457 {
1458 .cmd = BATADV_CMD_SET_VLAN,
1459 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1460 .flags = GENL_ADMIN_PERM,
1461 .doit = batadv_netlink_set_vlan,
1462 .internal_flags = BATADV_FLAG_NEED_MESH |
1463 BATADV_FLAG_NEED_VLAN,
1464 },
1465 };
1466
1467 struct genl_family batadv_netlink_family __ro_after_init = {
1468 .hdrsize = 0,
1469 .name = BATADV_NL_NAME,
1470 .version = 1,
1471 .maxattr = BATADV_ATTR_MAX,
1472 .policy = batadv_netlink_policy,
1473 .netnsok = true,
1474 .pre_doit = batadv_pre_doit,
1475 .post_doit = batadv_post_doit,
1476 .module = THIS_MODULE,
1477 .ops = batadv_netlink_ops,
1478 .n_ops = ARRAY_SIZE(batadv_netlink_ops),
1479 .mcgrps = batadv_netlink_mcgrps,
1480 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
1481 };
1482
1483 /**
1484 * batadv_netlink_register() - register batadv genl netlink family
1485 */
batadv_netlink_register(void)1486 void __init batadv_netlink_register(void)
1487 {
1488 int ret;
1489
1490 ret = genl_register_family(&batadv_netlink_family);
1491 if (ret)
1492 pr_warn("unable to register netlink family");
1493 }
1494
1495 /**
1496 * batadv_netlink_unregister() - unregister batadv genl netlink family
1497 */
batadv_netlink_unregister(void)1498 void batadv_netlink_unregister(void)
1499 {
1500 genl_unregister_family(&batadv_netlink_family);
1501 }
1502