1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) B.A.T.M.A.N. contributors:
3 *
4 * Matthias Schiffer
5 */
6
7#include "netlink.h"
8#include "main.h"
9
10#include <linux/array_size.h>
11#include <linux/atomic.h>
12#include <linux/bitops.h>
13#include <linux/bug.h>
14#include <linux/byteorder/generic.h>
15#include <linux/cache.h>
16#include <linux/err.h>
17#include <linux/errno.h>
18#include <linux/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/limits.h>
24#include <linux/list.h>
25#include <linux/minmax.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
54struct genl_family batadv_netlink_family;
55
56/* multicast groups */
57enum 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 */
65enum 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
88static 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
93static 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 */
162int
163batadv_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(nla: attr) == sizeof(u32)) ? nla_get_u32(nla: 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 */
177static 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(v: &vlan->ap_isolation);
188 batadv_softif_vlan_put(vlan);
189
190 return nla_put_u8(skb: msg, attrtype: BATADV_ATTR_AP_ISOLATION_ENABLED,
191 value: !!ap_isolation);
192}
193
194/**
195 * batadv_netlink_set_mesh_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 */
201static 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(v: &vlan->ap_isolation, i: !!nla_get_u8(nla: 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 */
227static 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(skb: msg, portid, seq, family: &batadv_netlink_family, flags, cmd);
238 if (!hdr)
239 return -ENOBUFS;
240
241 if (nla_put_string(skb: msg, attrtype: BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
242 nla_put_string(skb: msg, attrtype: BATADV_ATTR_ALGO_NAME,
243 str: bat_priv->algo_ops->name) ||
244 nla_put_u32(skb: msg, attrtype: BATADV_ATTR_MESH_IFINDEX, value: soft_iface->ifindex) ||
245 nla_put_string(skb: msg, attrtype: BATADV_ATTR_MESH_IFNAME, str: soft_iface->name) ||
246 nla_put(skb: msg, attrtype: BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
247 data: soft_iface->dev_addr) ||
248 nla_put_u8(skb: msg, attrtype: BATADV_ATTR_TT_TTVN,
249 value: (u8)atomic_read(v: &bat_priv->tt.vn)))
250 goto nla_put_failure;
251
252#ifdef CONFIG_BATMAN_ADV_BLA
253 if (nla_put_u16(skb: msg, attrtype: 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(skb: msg, attrtype: BATADV_ATTR_HARD_IFINDEX,
266 value: hard_iface->ifindex) ||
267 nla_put_string(skb: msg, attrtype: BATADV_ATTR_HARD_IFNAME,
268 str: hard_iface->name) ||
269 nla_put(skb: msg, attrtype: BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
270 data: hard_iface->dev_addr))
271 goto nla_put_failure;
272 }
273
274 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_AGGREGATED_OGMS_ENABLED,
275 value: !!atomic_read(v: &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(skb: msg, attrtype: BATADV_ATTR_ISOLATION_MARK,
282 value: bat_priv->isolation_mark))
283 goto nla_put_failure;
284
285 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_ISOLATION_MASK,
286 value: bat_priv->isolation_mark_mask))
287 goto nla_put_failure;
288
289 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_BONDING_ENABLED,
290 value: !!atomic_read(v: &bat_priv->bonding)))
291 goto nla_put_failure;
292
293#ifdef CONFIG_BATMAN_ADV_BLA
294 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
295 value: !!atomic_read(v: &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(skb: msg, attrtype: BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
301 value: !!atomic_read(v: &bat_priv->distributed_arp_table)))
302 goto nla_put_failure;
303#endif /* CONFIG_BATMAN_ADV_DAT */
304
305 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_FRAGMENTATION_ENABLED,
306 value: !!atomic_read(v: &bat_priv->fragmentation)))
307 goto nla_put_failure;
308
309 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_GW_BANDWIDTH_DOWN,
310 value: atomic_read(v: &bat_priv->gw.bandwidth_down)))
311 goto nla_put_failure;
312
313 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_GW_BANDWIDTH_UP,
314 value: atomic_read(v: &bat_priv->gw.bandwidth_up)))
315 goto nla_put_failure;
316
317 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_GW_MODE,
318 value: atomic_read(v: &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(skb: msg, attrtype: BATADV_ATTR_GW_SEL_CLASS,
327 value: atomic_read(v: &bat_priv->gw.sel_class)))
328 goto nla_put_failure;
329 }
330
331 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_HOP_PENALTY,
332 value: atomic_read(v: &bat_priv->hop_penalty)))
333 goto nla_put_failure;
334
335#ifdef CONFIG_BATMAN_ADV_DEBUG
336 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_LOG_LEVEL,
337 value: atomic_read(v: &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(skb: msg, attrtype: BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
343 value: !atomic_read(v: &bat_priv->multicast_mode)))
344 goto nla_put_failure;
345
346 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_MULTICAST_FANOUT,
347 value: atomic_read(v: &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(skb: msg, attrtype: BATADV_ATTR_NETWORK_CODING_ENABLED,
353 value: !!atomic_read(v: &bat_priv->network_coding)))
354 goto nla_put_failure;
355#endif /* CONFIG_BATMAN_ADV_NC */
356
357 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_ORIG_INTERVAL,
358 value: atomic_read(v: &bat_priv->orig_interval)))
359 goto nla_put_failure;
360
361 batadv_hardif_put(hard_iface: primary_if);
362
363 genlmsg_end(skb: msg, hdr);
364 return 0;
365
366nla_put_failure:
367 batadv_hardif_put(hard_iface: primary_if);
368
369 genlmsg_cancel(skb: msg, hdr);
370 return -EMSGSIZE;
371}
372
373/**
374 * batadv_netlink_notify_mesh() - send softif attributes to listener
375 * @bat_priv: the bat priv with all the soft interface information
376 *
377 * Return: 0 on success, < 0 on error
378 */
379static int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
380{
381 struct sk_buff *msg;
382 int ret;
383
384 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
385 if (!msg)
386 return -ENOMEM;
387
388 ret = batadv_netlink_mesh_fill(msg, bat_priv, cmd: BATADV_CMD_SET_MESH,
389 portid: 0, seq: 0, flags: 0);
390 if (ret < 0) {
391 nlmsg_free(skb: msg);
392 return ret;
393 }
394
395 genlmsg_multicast_netns(family: &batadv_netlink_family,
396 net: dev_net(dev: bat_priv->soft_iface), skb: msg, portid: 0,
397 group: BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
398
399 return 0;
400}
401
402/**
403 * batadv_netlink_get_mesh() - Get softif attributes
404 * @skb: Netlink message with request data
405 * @info: receiver information
406 *
407 * Return: 0 on success or negative error number in case of failure
408 */
409static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info)
410{
411 struct batadv_priv *bat_priv = info->user_ptr[0];
412 struct sk_buff *msg;
413 int ret;
414
415 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
416 if (!msg)
417 return -ENOMEM;
418
419 ret = batadv_netlink_mesh_fill(msg, bat_priv, cmd: BATADV_CMD_GET_MESH,
420 portid: info->snd_portid, seq: info->snd_seq, flags: 0);
421 if (ret < 0) {
422 nlmsg_free(skb: msg);
423 return ret;
424 }
425
426 ret = genlmsg_reply(skb: msg, info);
427
428 return ret;
429}
430
431/**
432 * batadv_netlink_set_mesh() - Set softif attributes
433 * @skb: Netlink message with request data
434 * @info: receiver information
435 *
436 * Return: 0 on success or negative error number in case of failure
437 */
438static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
439{
440 struct batadv_priv *bat_priv = info->user_ptr[0];
441 struct nlattr *attr;
442
443 if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) {
444 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED];
445
446 atomic_set(v: &bat_priv->aggregated_ogms, i: !!nla_get_u8(nla: attr));
447 }
448
449 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
450 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
451
452 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv);
453 }
454
455 if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) {
456 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK];
457
458 bat_priv->isolation_mark = nla_get_u32(nla: attr);
459 }
460
461 if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) {
462 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK];
463
464 bat_priv->isolation_mark_mask = nla_get_u32(nla: attr);
465 }
466
467 if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) {
468 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED];
469
470 atomic_set(v: &bat_priv->bonding, i: !!nla_get_u8(nla: attr));
471 }
472
473#ifdef CONFIG_BATMAN_ADV_BLA
474 if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) {
475 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED];
476
477 atomic_set(v: &bat_priv->bridge_loop_avoidance,
478 i: !!nla_get_u8(nla: attr));
479 batadv_bla_status_update(net_dev: bat_priv->soft_iface);
480 }
481#endif /* CONFIG_BATMAN_ADV_BLA */
482
483#ifdef CONFIG_BATMAN_ADV_DAT
484 if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
485 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
486
487 atomic_set(v: &bat_priv->distributed_arp_table,
488 i: !!nla_get_u8(nla: attr));
489 batadv_dat_status_update(net_dev: bat_priv->soft_iface);
490 }
491#endif /* CONFIG_BATMAN_ADV_DAT */
492
493 if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
494 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
495
496 atomic_set(v: &bat_priv->fragmentation, i: !!nla_get_u8(nla: attr));
497
498 rtnl_lock();
499 batadv_update_min_mtu(soft_iface: bat_priv->soft_iface);
500 rtnl_unlock();
501 }
502
503 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {
504 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN];
505
506 atomic_set(v: &bat_priv->gw.bandwidth_down, i: nla_get_u32(nla: attr));
507 batadv_gw_tvlv_container_update(bat_priv);
508 }
509
510 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) {
511 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP];
512
513 atomic_set(v: &bat_priv->gw.bandwidth_up, i: nla_get_u32(nla: attr));
514 batadv_gw_tvlv_container_update(bat_priv);
515 }
516
517 if (info->attrs[BATADV_ATTR_GW_MODE]) {
518 u8 gw_mode;
519
520 attr = info->attrs[BATADV_ATTR_GW_MODE];
521 gw_mode = nla_get_u8(nla: attr);
522
523 if (gw_mode <= BATADV_GW_MODE_SERVER) {
524 /* Invoking batadv_gw_reselect() is not enough to really
525 * de-select the current GW. It will only instruct the
526 * gateway client code to perform a re-election the next
527 * time that this is needed.
528 *
529 * When gw client mode is being switched off the current
530 * GW must be de-selected explicitly otherwise no GW_ADD
531 * uevent is thrown on client mode re-activation. This
532 * is operation is performed in
533 * batadv_gw_check_client_stop().
534 */
535 batadv_gw_reselect(bat_priv);
536
537 /* always call batadv_gw_check_client_stop() before
538 * changing the gateway state
539 */
540 batadv_gw_check_client_stop(bat_priv);
541 atomic_set(v: &bat_priv->gw.mode, i: gw_mode);
542 batadv_gw_tvlv_container_update(bat_priv);
543 }
544 }
545
546 if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] &&
547 bat_priv->algo_ops->gw.get_best_gw_node &&
548 bat_priv->algo_ops->gw.is_eligible) {
549 /* setting the GW selection class is allowed only if the routing
550 * algorithm in use implements the GW API
551 */
552
553 u32 sel_class_max = bat_priv->algo_ops->gw.sel_class_max;
554 u32 sel_class;
555
556 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
557 sel_class = nla_get_u32(nla: attr);
558
559 if (sel_class >= 1 && sel_class <= sel_class_max) {
560 atomic_set(v: &bat_priv->gw.sel_class, i: sel_class);
561 batadv_gw_reselect(bat_priv);
562 }
563 }
564
565 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
566 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
567
568 atomic_set(v: &bat_priv->hop_penalty, i: nla_get_u8(nla: attr));
569 }
570
571#ifdef CONFIG_BATMAN_ADV_DEBUG
572 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) {
573 attr = info->attrs[BATADV_ATTR_LOG_LEVEL];
574
575 atomic_set(v: &bat_priv->log_level,
576 i: nla_get_u32(nla: attr) & BATADV_DBG_ALL);
577 }
578#endif /* CONFIG_BATMAN_ADV_DEBUG */
579
580#ifdef CONFIG_BATMAN_ADV_MCAST
581 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) {
582 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
583
584 atomic_set(v: &bat_priv->multicast_mode, i: !nla_get_u8(nla: attr));
585 }
586
587 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) {
588 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT];
589
590 atomic_set(v: &bat_priv->multicast_fanout, i: nla_get_u32(nla: attr));
591 }
592#endif /* CONFIG_BATMAN_ADV_MCAST */
593
594#ifdef CONFIG_BATMAN_ADV_NC
595 if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) {
596 attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED];
597
598 atomic_set(v: &bat_priv->network_coding, i: !!nla_get_u8(nla: attr));
599 batadv_nc_status_update(net_dev: bat_priv->soft_iface);
600 }
601#endif /* CONFIG_BATMAN_ADV_NC */
602
603 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
604 u32 orig_interval;
605
606 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
607 orig_interval = nla_get_u32(nla: attr);
608
609 orig_interval = min_t(u32, orig_interval, INT_MAX);
610 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
611
612 atomic_set(v: &bat_priv->orig_interval, i: orig_interval);
613 }
614
615 batadv_netlink_notify_mesh(bat_priv);
616
617 return 0;
618}
619
620/**
621 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
622 * @msg: netlink message to be sent back
623 * @cookie: tp meter session cookie
624 *
625 * Return: 0 on success, < 0 on error
626 */
627static int
628batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
629{
630 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_TPMETER_COOKIE, value: cookie))
631 return -ENOBUFS;
632
633 return 0;
634}
635
636/**
637 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
638 * @bat_priv: the bat priv with all the soft interface information
639 * @dst: destination of tp_meter session
640 * @result: reason for tp meter session stop
641 * @test_time: total time of the tp_meter session
642 * @total_bytes: bytes acked to the receiver
643 * @cookie: cookie of tp_meter session
644 *
645 * Return: 0 on success, < 0 on error
646 */
647int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
648 u8 result, u32 test_time, u64 total_bytes,
649 u32 cookie)
650{
651 struct sk_buff *msg;
652 void *hdr;
653 int ret;
654
655 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
656 if (!msg)
657 return -ENOMEM;
658
659 hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &batadv_netlink_family, flags: 0,
660 cmd: BATADV_CMD_TP_METER);
661 if (!hdr) {
662 ret = -ENOBUFS;
663 goto err_genlmsg;
664 }
665
666 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_TPMETER_COOKIE, value: cookie))
667 goto nla_put_failure;
668
669 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_TPMETER_TEST_TIME, value: test_time))
670 goto nla_put_failure;
671
672 if (nla_put_u64_64bit(skb: msg, attrtype: BATADV_ATTR_TPMETER_BYTES, value: total_bytes,
673 padattr: BATADV_ATTR_PAD))
674 goto nla_put_failure;
675
676 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_TPMETER_RESULT, value: result))
677 goto nla_put_failure;
678
679 if (nla_put(skb: msg, attrtype: BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, data: dst))
680 goto nla_put_failure;
681
682 genlmsg_end(skb: msg, hdr);
683
684 genlmsg_multicast_netns(family: &batadv_netlink_family,
685 net: dev_net(dev: bat_priv->soft_iface), skb: msg, portid: 0,
686 group: BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
687
688 return 0;
689
690nla_put_failure:
691 genlmsg_cancel(skb: msg, hdr);
692 ret = -EMSGSIZE;
693
694err_genlmsg:
695 nlmsg_free(skb: msg);
696 return ret;
697}
698
699/**
700 * batadv_netlink_tp_meter_start() - Start a new tp_meter session
701 * @skb: received netlink message
702 * @info: receiver information
703 *
704 * Return: 0 on success, < 0 on error
705 */
706static int
707batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
708{
709 struct batadv_priv *bat_priv = info->user_ptr[0];
710 struct sk_buff *msg = NULL;
711 u32 test_length;
712 void *msg_head;
713 u32 cookie;
714 u8 *dst;
715 int ret;
716
717 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
718 return -EINVAL;
719
720 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
721 return -EINVAL;
722
723 dst = nla_data(nla: info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
724
725 test_length = nla_get_u32(nla: info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
726
727 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
728 if (!msg) {
729 ret = -ENOMEM;
730 goto out;
731 }
732
733 msg_head = genlmsg_put(skb: msg, portid: info->snd_portid, seq: info->snd_seq,
734 family: &batadv_netlink_family, flags: 0,
735 cmd: BATADV_CMD_TP_METER);
736 if (!msg_head) {
737 ret = -ENOBUFS;
738 goto out;
739 }
740
741 batadv_tp_start(bat_priv, dst, test_length, cookie: &cookie);
742
743 ret = batadv_netlink_tp_meter_put(msg, cookie);
744
745 out:
746 if (ret) {
747 if (msg)
748 nlmsg_free(skb: msg);
749 return ret;
750 }
751
752 genlmsg_end(skb: msg, hdr: msg_head);
753 return genlmsg_reply(skb: msg, info);
754}
755
756/**
757 * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session
758 * @skb: received netlink message
759 * @info: receiver information
760 *
761 * Return: 0 on success, < 0 on error
762 */
763static int
764batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
765{
766 struct batadv_priv *bat_priv = info->user_ptr[0];
767 u8 *dst;
768 int ret = 0;
769
770 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
771 return -EINVAL;
772
773 dst = nla_data(nla: info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
774
775 batadv_tp_stop(bat_priv, dst, return_value: BATADV_TP_REASON_CANCEL);
776
777 return ret;
778}
779
780/**
781 * batadv_netlink_hardif_fill() - Fill message with hardif attributes
782 * @msg: Netlink message to dump into
783 * @bat_priv: the bat priv with all the soft interface information
784 * @hard_iface: hard interface which was modified
785 * @cmd: type of message to generate
786 * @portid: Port making netlink request
787 * @seq: sequence number for message
788 * @flags: Additional flags for message
789 * @cb: Control block containing additional options
790 *
791 * Return: 0 on success or negative error number in case of failure
792 */
793static int batadv_netlink_hardif_fill(struct sk_buff *msg,
794 struct batadv_priv *bat_priv,
795 struct batadv_hard_iface *hard_iface,
796 enum batadv_nl_commands cmd,
797 u32 portid, u32 seq, int flags,
798 struct netlink_callback *cb)
799{
800 struct net_device *net_dev = hard_iface->net_dev;
801 void *hdr;
802
803 hdr = genlmsg_put(skb: msg, portid, seq, family: &batadv_netlink_family, flags, cmd);
804 if (!hdr)
805 return -ENOBUFS;
806
807 if (cb)
808 genl_dump_check_consistent(cb, user_hdr: hdr);
809
810 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_MESH_IFINDEX,
811 value: bat_priv->soft_iface->ifindex))
812 goto nla_put_failure;
813
814 if (nla_put_string(skb: msg, attrtype: BATADV_ATTR_MESH_IFNAME,
815 str: bat_priv->soft_iface->name))
816 goto nla_put_failure;
817
818 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_HARD_IFINDEX,
819 value: net_dev->ifindex) ||
820 nla_put_string(skb: msg, attrtype: BATADV_ATTR_HARD_IFNAME,
821 str: net_dev->name) ||
822 nla_put(skb: msg, attrtype: BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
823 data: net_dev->dev_addr))
824 goto nla_put_failure;
825
826 if (hard_iface->if_status == BATADV_IF_ACTIVE) {
827 if (nla_put_flag(skb: msg, attrtype: BATADV_ATTR_ACTIVE))
828 goto nla_put_failure;
829 }
830
831 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_HOP_PENALTY,
832 value: atomic_read(v: &hard_iface->hop_penalty)))
833 goto nla_put_failure;
834
835#ifdef CONFIG_BATMAN_ADV_BATMAN_V
836 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_ELP_INTERVAL,
837 value: atomic_read(v: &hard_iface->bat_v.elp_interval)))
838 goto nla_put_failure;
839
840 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_THROUGHPUT_OVERRIDE,
841 value: atomic_read(v: &hard_iface->bat_v.throughput_override)))
842 goto nla_put_failure;
843#endif /* CONFIG_BATMAN_ADV_BATMAN_V */
844
845 genlmsg_end(skb: msg, hdr);
846 return 0;
847
848nla_put_failure:
849 genlmsg_cancel(skb: msg, hdr);
850 return -EMSGSIZE;
851}
852
853/**
854 * batadv_netlink_notify_hardif() - send hardif attributes to listener
855 * @bat_priv: the bat priv with all the soft interface information
856 * @hard_iface: hard interface which was modified
857 *
858 * Return: 0 on success, < 0 on error
859 */
860static int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
861 struct batadv_hard_iface *hard_iface)
862{
863 struct sk_buff *msg;
864 int ret;
865
866 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
867 if (!msg)
868 return -ENOMEM;
869
870 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
871 cmd: BATADV_CMD_SET_HARDIF, portid: 0, seq: 0, flags: 0, NULL);
872 if (ret < 0) {
873 nlmsg_free(skb: msg);
874 return ret;
875 }
876
877 genlmsg_multicast_netns(family: &batadv_netlink_family,
878 net: dev_net(dev: bat_priv->soft_iface), skb: msg, portid: 0,
879 group: BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
880
881 return 0;
882}
883
884/**
885 * batadv_netlink_get_hardif() - Get hardif attributes
886 * @skb: Netlink message with request data
887 * @info: receiver information
888 *
889 * Return: 0 on success or negative error number in case of failure
890 */
891static int batadv_netlink_get_hardif(struct sk_buff *skb,
892 struct genl_info *info)
893{
894 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
895 struct batadv_priv *bat_priv = info->user_ptr[0];
896 struct sk_buff *msg;
897 int ret;
898
899 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
900 if (!msg)
901 return -ENOMEM;
902
903 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
904 cmd: BATADV_CMD_GET_HARDIF,
905 portid: info->snd_portid, seq: info->snd_seq, flags: 0,
906 NULL);
907 if (ret < 0) {
908 nlmsg_free(skb: msg);
909 return ret;
910 }
911
912 ret = genlmsg_reply(skb: msg, info);
913
914 return ret;
915}
916
917/**
918 * batadv_netlink_set_hardif() - Set hardif attributes
919 * @skb: Netlink message with request data
920 * @info: receiver information
921 *
922 * Return: 0 on success or negative error number in case of failure
923 */
924static int batadv_netlink_set_hardif(struct sk_buff *skb,
925 struct genl_info *info)
926{
927 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
928 struct batadv_priv *bat_priv = info->user_ptr[0];
929 struct nlattr *attr;
930
931 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
932 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
933
934 atomic_set(v: &hard_iface->hop_penalty, i: nla_get_u8(nla: attr));
935 }
936
937#ifdef CONFIG_BATMAN_ADV_BATMAN_V
938
939 if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) {
940 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL];
941
942 atomic_set(v: &hard_iface->bat_v.elp_interval, i: nla_get_u32(nla: attr));
943 }
944
945 if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) {
946 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE];
947
948 atomic_set(v: &hard_iface->bat_v.throughput_override,
949 i: nla_get_u32(nla: attr));
950 }
951#endif /* CONFIG_BATMAN_ADV_BATMAN_V */
952
953 batadv_netlink_notify_hardif(bat_priv, hard_iface);
954
955 return 0;
956}
957
958/**
959 * batadv_netlink_dump_hardif() - Dump all hard interface into a messages
960 * @msg: Netlink message to dump into
961 * @cb: Parameters from query
962 *
963 * Return: error code, or length of reply message on success
964 */
965static int
966batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb)
967{
968 struct net *net = sock_net(sk: cb->skb->sk);
969 struct net_device *soft_iface;
970 struct batadv_hard_iface *hard_iface;
971 struct batadv_priv *bat_priv;
972 int ifindex;
973 int portid = NETLINK_CB(cb->skb).portid;
974 int skip = cb->args[0];
975 int i = 0;
976
977 ifindex = batadv_netlink_get_ifindex(nlh: cb->nlh,
978 attrtype: BATADV_ATTR_MESH_IFINDEX);
979 if (!ifindex)
980 return -EINVAL;
981
982 soft_iface = dev_get_by_index(net, ifindex);
983 if (!soft_iface)
984 return -ENODEV;
985
986 if (!batadv_softif_is_valid(net_dev: soft_iface)) {
987 dev_put(dev: soft_iface);
988 return -ENODEV;
989 }
990
991 bat_priv = netdev_priv(dev: soft_iface);
992
993 rtnl_lock();
994 cb->seq = batadv_hardif_generation << 1 | 1;
995
996 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
997 if (hard_iface->soft_iface != soft_iface)
998 continue;
999
1000 if (i++ < skip)
1001 continue;
1002
1003 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
1004 cmd: BATADV_CMD_GET_HARDIF,
1005 portid, seq: cb->nlh->nlmsg_seq,
1006 NLM_F_MULTI, cb)) {
1007 i--;
1008 break;
1009 }
1010 }
1011
1012 rtnl_unlock();
1013
1014 dev_put(dev: soft_iface);
1015
1016 cb->args[0] = i;
1017
1018 return msg->len;
1019}
1020
1021/**
1022 * batadv_netlink_vlan_fill() - Fill message with vlan attributes
1023 * @msg: Netlink message to dump into
1024 * @bat_priv: the bat priv with all the soft interface information
1025 * @vlan: vlan which was modified
1026 * @cmd: type of message to generate
1027 * @portid: Port making netlink request
1028 * @seq: sequence number for message
1029 * @flags: Additional flags for message
1030 *
1031 * Return: 0 on success or negative error number in case of failure
1032 */
1033static int batadv_netlink_vlan_fill(struct sk_buff *msg,
1034 struct batadv_priv *bat_priv,
1035 struct batadv_softif_vlan *vlan,
1036 enum batadv_nl_commands cmd,
1037 u32 portid, u32 seq, int flags)
1038{
1039 void *hdr;
1040
1041 hdr = genlmsg_put(skb: msg, portid, seq, family: &batadv_netlink_family, flags, cmd);
1042 if (!hdr)
1043 return -ENOBUFS;
1044
1045 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_MESH_IFINDEX,
1046 value: bat_priv->soft_iface->ifindex))
1047 goto nla_put_failure;
1048
1049 if (nla_put_string(skb: msg, attrtype: BATADV_ATTR_MESH_IFNAME,
1050 str: bat_priv->soft_iface->name))
1051 goto nla_put_failure;
1052
1053 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_VLANID, value: vlan->vid & VLAN_VID_MASK))
1054 goto nla_put_failure;
1055
1056 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_AP_ISOLATION_ENABLED,
1057 value: !!atomic_read(v: &vlan->ap_isolation)))
1058 goto nla_put_failure;
1059
1060 genlmsg_end(skb: msg, hdr);
1061 return 0;
1062
1063nla_put_failure:
1064 genlmsg_cancel(skb: msg, hdr);
1065 return -EMSGSIZE;
1066}
1067
1068/**
1069 * batadv_netlink_notify_vlan() - send vlan attributes to listener
1070 * @bat_priv: the bat priv with all the soft interface information
1071 * @vlan: vlan which was modified
1072 *
1073 * Return: 0 on success, < 0 on error
1074 */
1075static int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
1076 struct batadv_softif_vlan *vlan)
1077{
1078 struct sk_buff *msg;
1079 int ret;
1080
1081 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1082 if (!msg)
1083 return -ENOMEM;
1084
1085 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan,
1086 cmd: BATADV_CMD_SET_VLAN, portid: 0, seq: 0, flags: 0);
1087 if (ret < 0) {
1088 nlmsg_free(skb: msg);
1089 return ret;
1090 }
1091
1092 genlmsg_multicast_netns(family: &batadv_netlink_family,
1093 net: dev_net(dev: bat_priv->soft_iface), skb: msg, portid: 0,
1094 group: BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
1095
1096 return 0;
1097}
1098
1099/**
1100 * batadv_netlink_get_vlan() - Get vlan attributes
1101 * @skb: Netlink message with request data
1102 * @info: receiver information
1103 *
1104 * Return: 0 on success or negative error number in case of failure
1105 */
1106static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info)
1107{
1108 struct batadv_softif_vlan *vlan = info->user_ptr[1];
1109 struct batadv_priv *bat_priv = info->user_ptr[0];
1110 struct sk_buff *msg;
1111 int ret;
1112
1113 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1114 if (!msg)
1115 return -ENOMEM;
1116
1117 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, cmd: BATADV_CMD_GET_VLAN,
1118 portid: info->snd_portid, seq: info->snd_seq, flags: 0);
1119 if (ret < 0) {
1120 nlmsg_free(skb: msg);
1121 return ret;
1122 }
1123
1124 ret = genlmsg_reply(skb: msg, info);
1125
1126 return ret;
1127}
1128
1129/**
1130 * batadv_netlink_set_vlan() - Get vlan attributes
1131 * @skb: Netlink message with request data
1132 * @info: receiver information
1133 *
1134 * Return: 0 on success or negative error number in case of failure
1135 */
1136static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info)
1137{
1138 struct batadv_softif_vlan *vlan = info->user_ptr[1];
1139 struct batadv_priv *bat_priv = info->user_ptr[0];
1140 struct nlattr *attr;
1141
1142 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
1143 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
1144
1145 atomic_set(v: &vlan->ap_isolation, i: !!nla_get_u8(nla: attr));
1146 }
1147
1148 batadv_netlink_notify_vlan(bat_priv, vlan);
1149
1150 return 0;
1151}
1152
1153/**
1154 * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes
1155 * @net: the applicable net namespace
1156 * @info: receiver information
1157 *
1158 * Return: Pointer to soft interface (with increased refcnt) on success, error
1159 * pointer on error
1160 */
1161static struct net_device *
1162batadv_get_softif_from_info(struct net *net, struct genl_info *info)
1163{
1164 struct net_device *soft_iface;
1165 int ifindex;
1166
1167 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
1168 return ERR_PTR(error: -EINVAL);
1169
1170 ifindex = nla_get_u32(nla: info->attrs[BATADV_ATTR_MESH_IFINDEX]);
1171
1172 soft_iface = dev_get_by_index(net, ifindex);
1173 if (!soft_iface)
1174 return ERR_PTR(error: -ENODEV);
1175
1176 if (!batadv_softif_is_valid(net_dev: soft_iface))
1177 goto err_put_softif;
1178
1179 return soft_iface;
1180
1181err_put_softif:
1182 dev_put(dev: soft_iface);
1183
1184 return ERR_PTR(error: -EINVAL);
1185}
1186
1187/**
1188 * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes
1189 * @bat_priv: the bat priv with all the soft interface information
1190 * @net: the applicable net namespace
1191 * @info: receiver information
1192 *
1193 * Return: Pointer to hard interface (with increased refcnt) on success, error
1194 * pointer on error
1195 */
1196static struct batadv_hard_iface *
1197batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net,
1198 struct genl_info *info)
1199{
1200 struct batadv_hard_iface *hard_iface;
1201 struct net_device *hard_dev;
1202 unsigned int hardif_index;
1203
1204 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX])
1205 return ERR_PTR(error: -EINVAL);
1206
1207 hardif_index = nla_get_u32(nla: info->attrs[BATADV_ATTR_HARD_IFINDEX]);
1208
1209 hard_dev = dev_get_by_index(net, ifindex: hardif_index);
1210 if (!hard_dev)
1211 return ERR_PTR(error: -ENODEV);
1212
1213 hard_iface = batadv_hardif_get_by_netdev(net_dev: hard_dev);
1214 if (!hard_iface)
1215 goto err_put_harddev;
1216
1217 if (hard_iface->soft_iface != bat_priv->soft_iface)
1218 goto err_put_hardif;
1219
1220 /* hard_dev is referenced by hard_iface and not needed here */
1221 dev_put(dev: hard_dev);
1222
1223 return hard_iface;
1224
1225err_put_hardif:
1226 batadv_hardif_put(hard_iface);
1227err_put_harddev:
1228 dev_put(dev: hard_dev);
1229
1230 return ERR_PTR(error: -EINVAL);
1231}
1232
1233/**
1234 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes
1235 * @bat_priv: the bat priv with all the soft interface information
1236 * @net: the applicable net namespace
1237 * @info: receiver information
1238 *
1239 * Return: Pointer to vlan on success (with increased refcnt), error pointer
1240 * on error
1241 */
1242static struct batadv_softif_vlan *
1243batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net,
1244 struct genl_info *info)
1245{
1246 struct batadv_softif_vlan *vlan;
1247 u16 vid;
1248
1249 if (!info->attrs[BATADV_ATTR_VLANID])
1250 return ERR_PTR(error: -EINVAL);
1251
1252 vid = nla_get_u16(nla: info->attrs[BATADV_ATTR_VLANID]);
1253
1254 vlan = batadv_softif_vlan_get(bat_priv, vid: vid | BATADV_VLAN_HAS_TAG);
1255 if (!vlan)
1256 return ERR_PTR(error: -ENOENT);
1257
1258 return vlan;
1259}
1260
1261/**
1262 * batadv_pre_doit() - Prepare batman-adv genl doit request
1263 * @ops: requested netlink operation
1264 * @skb: Netlink message with request data
1265 * @info: receiver information
1266 *
1267 * Return: 0 on success or negative error number in case of failure
1268 */
1269static int batadv_pre_doit(const struct genl_split_ops *ops,
1270 struct sk_buff *skb,
1271 struct genl_info *info)
1272{
1273 struct net *net = genl_info_net(info);
1274 struct batadv_hard_iface *hard_iface;
1275 struct batadv_priv *bat_priv = NULL;
1276 struct batadv_softif_vlan *vlan;
1277 struct net_device *soft_iface;
1278 u8 user_ptr1_flags;
1279 u8 mesh_dep_flags;
1280 int ret;
1281
1282 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1283 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1))
1284 return -EINVAL;
1285
1286 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1287 if (WARN_ON((ops->internal_flags & mesh_dep_flags) &&
1288 (~ops->internal_flags & BATADV_FLAG_NEED_MESH)))
1289 return -EINVAL;
1290
1291 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) {
1292 soft_iface = batadv_get_softif_from_info(net, info);
1293 if (IS_ERR(ptr: soft_iface))
1294 return PTR_ERR(ptr: soft_iface);
1295
1296 bat_priv = netdev_priv(dev: soft_iface);
1297 info->user_ptr[0] = bat_priv;
1298 }
1299
1300 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) {
1301 hard_iface = batadv_get_hardif_from_info(bat_priv, net, info);
1302 if (IS_ERR(ptr: hard_iface)) {
1303 ret = PTR_ERR(ptr: hard_iface);
1304 goto err_put_softif;
1305 }
1306
1307 info->user_ptr[1] = hard_iface;
1308 }
1309
1310 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) {
1311 vlan = batadv_get_vlan_from_info(bat_priv, net, info);
1312 if (IS_ERR(ptr: vlan)) {
1313 ret = PTR_ERR(ptr: vlan);
1314 goto err_put_softif;
1315 }
1316
1317 info->user_ptr[1] = vlan;
1318 }
1319
1320 return 0;
1321
1322err_put_softif:
1323 if (bat_priv)
1324 dev_put(dev: bat_priv->soft_iface);
1325
1326 return ret;
1327}
1328
1329/**
1330 * batadv_post_doit() - End batman-adv genl doit request
1331 * @ops: requested netlink operation
1332 * @skb: Netlink message with request data
1333 * @info: receiver information
1334 */
1335static void batadv_post_doit(const struct genl_split_ops *ops,
1336 struct sk_buff *skb,
1337 struct genl_info *info)
1338{
1339 struct batadv_hard_iface *hard_iface;
1340 struct batadv_softif_vlan *vlan;
1341 struct batadv_priv *bat_priv;
1342
1343 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF &&
1344 info->user_ptr[1]) {
1345 hard_iface = info->user_ptr[1];
1346
1347 batadv_hardif_put(hard_iface);
1348 }
1349
1350 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) {
1351 vlan = info->user_ptr[1];
1352 batadv_softif_vlan_put(vlan);
1353 }
1354
1355 if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) {
1356 bat_priv = info->user_ptr[0];
1357 dev_put(dev: bat_priv->soft_iface);
1358 }
1359}
1360
1361static const struct genl_small_ops batadv_netlink_ops[] = {
1362 {
1363 .cmd = BATADV_CMD_GET_MESH,
1364 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1365 /* can be retrieved by unprivileged users */
1366 .doit = batadv_netlink_get_mesh,
1367 .internal_flags = BATADV_FLAG_NEED_MESH,
1368 },
1369 {
1370 .cmd = BATADV_CMD_TP_METER,
1371 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1372 .flags = GENL_UNS_ADMIN_PERM,
1373 .doit = batadv_netlink_tp_meter_start,
1374 .internal_flags = BATADV_FLAG_NEED_MESH,
1375 },
1376 {
1377 .cmd = BATADV_CMD_TP_METER_CANCEL,
1378 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1379 .flags = GENL_UNS_ADMIN_PERM,
1380 .doit = batadv_netlink_tp_meter_cancel,
1381 .internal_flags = BATADV_FLAG_NEED_MESH,
1382 },
1383 {
1384 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
1385 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1386 .flags = GENL_UNS_ADMIN_PERM,
1387 .dumpit = batadv_algo_dump,
1388 },
1389 {
1390 .cmd = BATADV_CMD_GET_HARDIF,
1391 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1392 /* can be retrieved by unprivileged users */
1393 .dumpit = batadv_netlink_dump_hardif,
1394 .doit = batadv_netlink_get_hardif,
1395 .internal_flags = BATADV_FLAG_NEED_MESH |
1396 BATADV_FLAG_NEED_HARDIF,
1397 },
1398 {
1399 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
1400 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1401 .flags = GENL_UNS_ADMIN_PERM,
1402 .dumpit = batadv_tt_local_dump,
1403 },
1404 {
1405 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
1406 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1407 .flags = GENL_UNS_ADMIN_PERM,
1408 .dumpit = batadv_tt_global_dump,
1409 },
1410 {
1411 .cmd = BATADV_CMD_GET_ORIGINATORS,
1412 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1413 .flags = GENL_UNS_ADMIN_PERM,
1414 .dumpit = batadv_orig_dump,
1415 },
1416 {
1417 .cmd = BATADV_CMD_GET_NEIGHBORS,
1418 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1419 .flags = GENL_UNS_ADMIN_PERM,
1420 .dumpit = batadv_hardif_neigh_dump,
1421 },
1422 {
1423 .cmd = BATADV_CMD_GET_GATEWAYS,
1424 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1425 .flags = GENL_UNS_ADMIN_PERM,
1426 .dumpit = batadv_gw_dump,
1427 },
1428 {
1429 .cmd = BATADV_CMD_GET_BLA_CLAIM,
1430 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1431 .flags = GENL_UNS_ADMIN_PERM,
1432 .dumpit = batadv_bla_claim_dump,
1433 },
1434 {
1435 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
1436 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1437 .flags = GENL_UNS_ADMIN_PERM,
1438 .dumpit = batadv_bla_backbone_dump,
1439 },
1440 {
1441 .cmd = BATADV_CMD_GET_DAT_CACHE,
1442 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1443 .flags = GENL_UNS_ADMIN_PERM,
1444 .dumpit = batadv_dat_cache_dump,
1445 },
1446 {
1447 .cmd = BATADV_CMD_GET_MCAST_FLAGS,
1448 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1449 .flags = GENL_UNS_ADMIN_PERM,
1450 .dumpit = batadv_mcast_flags_dump,
1451 },
1452 {
1453 .cmd = BATADV_CMD_SET_MESH,
1454 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1455 .flags = GENL_UNS_ADMIN_PERM,
1456 .doit = batadv_netlink_set_mesh,
1457 .internal_flags = BATADV_FLAG_NEED_MESH,
1458 },
1459 {
1460 .cmd = BATADV_CMD_SET_HARDIF,
1461 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1462 .flags = GENL_UNS_ADMIN_PERM,
1463 .doit = batadv_netlink_set_hardif,
1464 .internal_flags = BATADV_FLAG_NEED_MESH |
1465 BATADV_FLAG_NEED_HARDIF,
1466 },
1467 {
1468 .cmd = BATADV_CMD_GET_VLAN,
1469 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1470 /* can be retrieved by unprivileged users */
1471 .doit = batadv_netlink_get_vlan,
1472 .internal_flags = BATADV_FLAG_NEED_MESH |
1473 BATADV_FLAG_NEED_VLAN,
1474 },
1475 {
1476 .cmd = BATADV_CMD_SET_VLAN,
1477 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1478 .flags = GENL_UNS_ADMIN_PERM,
1479 .doit = batadv_netlink_set_vlan,
1480 .internal_flags = BATADV_FLAG_NEED_MESH |
1481 BATADV_FLAG_NEED_VLAN,
1482 },
1483};
1484
1485struct genl_family batadv_netlink_family __ro_after_init = {
1486 .hdrsize = 0,
1487 .name = BATADV_NL_NAME,
1488 .version = 1,
1489 .maxattr = BATADV_ATTR_MAX,
1490 .policy = batadv_netlink_policy,
1491 .netnsok = true,
1492 .pre_doit = batadv_pre_doit,
1493 .post_doit = batadv_post_doit,
1494 .module = THIS_MODULE,
1495 .small_ops = batadv_netlink_ops,
1496 .n_small_ops = ARRAY_SIZE(batadv_netlink_ops),
1497 .resv_start_op = BATADV_CMD_SET_VLAN + 1,
1498 .mcgrps = batadv_netlink_mcgrps,
1499 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
1500};
1501
1502/**
1503 * batadv_netlink_register() - register batadv genl netlink family
1504 */
1505void __init batadv_netlink_register(void)
1506{
1507 int ret;
1508
1509 ret = genl_register_family(family: &batadv_netlink_family);
1510 if (ret)
1511 pr_warn("unable to register netlink family");
1512}
1513
1514/**
1515 * batadv_netlink_unregister() - unregister batadv genl netlink family
1516 */
1517void batadv_netlink_unregister(void)
1518{
1519 genl_unregister_family(family: &batadv_netlink_family);
1520}
1521

source code of linux/net/batman-adv/netlink.c