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

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