1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) B.A.T.M.A.N. contributors:
3 *
4 * Matthias Schiffer
5 */
6
7#include "netlink.h"
8#include "main.h"
9
10#include <linux/array_size.h>
11#include <linux/atomic.h>
12#include <linux/bitops.h>
13#include <linux/bug.h>
14#include <linux/byteorder/generic.h>
15#include <linux/cache.h>
16#include <linux/err.h>
17#include <linux/errno.h>
18#include <linux/gfp.h>
19#include <linux/if_ether.h>
20#include <linux/if_vlan.h>
21#include <linux/init.h>
22#include <linux/limits.h>
23#include <linux/minmax.h>
24#include <linux/netdevice.h>
25#include <linux/netlink.h>
26#include <linux/printk.h>
27#include <linux/rtnetlink.h>
28#include <linux/skbuff.h>
29#include <linux/stddef.h>
30#include <linux/types.h>
31#include <net/genetlink.h>
32#include <net/net_namespace.h>
33#include <net/netlink.h>
34#include <net/sock.h>
35#include <uapi/linux/batadv_packet.h>
36#include <uapi/linux/batman_adv.h>
37
38#include "bat_algo.h"
39#include "bridge_loop_avoidance.h"
40#include "distributed-arp-table.h"
41#include "gateway_client.h"
42#include "gateway_common.h"
43#include "hard-interface.h"
44#include "log.h"
45#include "mesh-interface.h"
46#include "multicast.h"
47#include "originator.h"
48#include "tp_meter.h"
49#include "translation-table.h"
50
51struct genl_family batadv_netlink_family;
52
53/* multicast groups */
54enum batadv_netlink_multicast_groups {
55 BATADV_NL_MCGRP_CONFIG,
56 BATADV_NL_MCGRP_TPMETER,
57};
58
59/**
60 * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags
61 */
62enum batadv_genl_ops_flags {
63 /**
64 * @BATADV_FLAG_NEED_MESH: request requires valid mesh interface in
65 * attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be
66 * saved in info->user_ptr[0]
67 */
68 BATADV_FLAG_NEED_MESH = BIT(0),
69
70 /**
71 * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in
72 * attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be
73 * saved in info->user_ptr[1]
74 */
75 BATADV_FLAG_NEED_HARDIF = BIT(1),
76
77 /**
78 * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in
79 * attribute BATADV_ATTR_VLANID and expects a pointer to it to be
80 * saved in info->user_ptr[1]
81 */
82 BATADV_FLAG_NEED_VLAN = BIT(2),
83};
84
85static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
86 [BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG },
87 [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
88};
89
90static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
91 [BATADV_ATTR_VERSION] = { .type = NLA_STRING },
92 [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
93 [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
94 [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
95 [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
96 [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
97 [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
98 [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
99 [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
100 [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
101 [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
102 [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
103 [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
104 [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
105 [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
106 [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
107 [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
108 [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
109 [BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
110 [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
111 [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
112 [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
113 [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
114 [BATADV_ATTR_TQ] = { .type = NLA_U8 },
115 [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
116 [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
117 [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
118 [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
119 [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
120 [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN },
121 [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
122 [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN },
123 [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
124 [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 },
125 [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN },
126 [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 },
127 [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 },
128 [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 },
129 [BATADV_ATTR_VLANID] = { .type = NLA_U16 },
130 [BATADV_ATTR_AGGREGATED_OGMS_ENABLED] = { .type = NLA_U8 },
131 [BATADV_ATTR_AP_ISOLATION_ENABLED] = { .type = NLA_U8 },
132 [BATADV_ATTR_ISOLATION_MARK] = { .type = NLA_U32 },
133 [BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 },
134 [BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 },
135 [BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 },
136 [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 },
137 [BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 },
138 [BATADV_ATTR_GW_BANDWIDTH_DOWN] = { .type = NLA_U32 },
139 [BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 },
140 [BATADV_ATTR_GW_MODE] = { .type = NLA_U8 },
141 [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 },
142 [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 },
143 [BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 },
144 [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 },
145 [BATADV_ATTR_MULTICAST_FANOUT] = { .type = NLA_U32 },
146 [BATADV_ATTR_ORIG_INTERVAL] = { .type = NLA_U32 },
147 [BATADV_ATTR_ELP_INTERVAL] = { .type = NLA_U32 },
148 [BATADV_ATTR_THROUGHPUT_OVERRIDE] = { .type = NLA_U32 },
149};
150
151/**
152 * batadv_netlink_get_ifindex() - Extract an interface index from a message
153 * @nlh: Message header
154 * @attrtype: Attribute which holds an interface index
155 *
156 * Return: interface index, or 0.
157 */
158static int batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
159{
160 struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
161
162 return (attr && nla_len(nla: attr) == sizeof(u32)) ? nla_get_u32(nla: attr) : 0;
163}
164
165/**
166 * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation meshif attribute
167 * @msg: Netlink message to dump into
168 * @bat_priv: the bat priv with all the mesh interface information
169 *
170 * Return: 0 on success or negative error number in case of failure
171 */
172static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg,
173 struct batadv_priv *bat_priv)
174{
175 struct batadv_meshif_vlan *vlan;
176 u8 ap_isolation;
177
178 vlan = batadv_meshif_vlan_get(bat_priv, BATADV_NO_FLAGS);
179 if (!vlan)
180 return 0;
181
182 ap_isolation = atomic_read(v: &vlan->ap_isolation);
183 batadv_meshif_vlan_put(vlan);
184
185 return nla_put_u8(skb: msg, attrtype: BATADV_ATTR_AP_ISOLATION_ENABLED,
186 value: !!ap_isolation);
187}
188
189/**
190 * batadv_netlink_set_mesh_ap_isolation() - Set ap_isolation from genl msg
191 * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute
192 * @bat_priv: the bat priv with all the mesh interface information
193 *
194 * Return: 0 on success or negative error number in case of failure
195 */
196static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr,
197 struct batadv_priv *bat_priv)
198{
199 struct batadv_meshif_vlan *vlan;
200
201 vlan = batadv_meshif_vlan_get(bat_priv, BATADV_NO_FLAGS);
202 if (!vlan)
203 return -ENOENT;
204
205 atomic_set(v: &vlan->ap_isolation, i: !!nla_get_u8(nla: attr));
206 batadv_meshif_vlan_put(vlan);
207
208 return 0;
209}
210
211/**
212 * batadv_netlink_mesh_fill() - Fill message with mesh attributes
213 * @msg: Netlink message to dump into
214 * @bat_priv: the bat priv with all the mesh interface information
215 * @cmd: type of message to generate
216 * @portid: Port making netlink request
217 * @seq: sequence number for message
218 * @flags: Additional flags for message
219 *
220 * Return: 0 on success or negative error number in case of failure
221 */
222static int batadv_netlink_mesh_fill(struct sk_buff *msg,
223 struct batadv_priv *bat_priv,
224 enum batadv_nl_commands cmd,
225 u32 portid, u32 seq, int flags)
226{
227 struct net_device *mesh_iface = bat_priv->mesh_iface;
228 struct batadv_hard_iface *primary_if = NULL;
229 struct net_device *hard_iface;
230 void *hdr;
231
232 hdr = genlmsg_put(skb: msg, portid, seq, family: &batadv_netlink_family, flags, cmd);
233 if (!hdr)
234 return -ENOBUFS;
235
236 if (nla_put_string(skb: msg, attrtype: BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
237 nla_put_string(skb: msg, attrtype: BATADV_ATTR_ALGO_NAME,
238 str: bat_priv->algo_ops->name) ||
239 nla_put_u32(skb: msg, attrtype: BATADV_ATTR_MESH_IFINDEX, value: mesh_iface->ifindex) ||
240 nla_put_string(skb: msg, attrtype: BATADV_ATTR_MESH_IFNAME, str: mesh_iface->name) ||
241 nla_put(skb: msg, attrtype: BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
242 data: mesh_iface->dev_addr) ||
243 nla_put_u8(skb: msg, attrtype: BATADV_ATTR_TT_TTVN,
244 value: (u8)atomic_read(v: &bat_priv->tt.vn)))
245 goto nla_put_failure;
246
247#ifdef CONFIG_BATMAN_ADV_BLA
248 if (nla_put_u16(skb: msg, attrtype: BATADV_ATTR_BLA_CRC,
249 ntohs(bat_priv->bla.claim_dest.group)))
250 goto nla_put_failure;
251#endif
252
253 if (batadv_mcast_mesh_info_put(msg, bat_priv))
254 goto nla_put_failure;
255
256 primary_if = batadv_primary_if_get_selected(bat_priv);
257 if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
258 hard_iface = primary_if->net_dev;
259
260 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_HARD_IFINDEX,
261 value: hard_iface->ifindex) ||
262 nla_put_string(skb: msg, attrtype: BATADV_ATTR_HARD_IFNAME,
263 str: hard_iface->name) ||
264 nla_put(skb: msg, attrtype: BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
265 data: hard_iface->dev_addr))
266 goto nla_put_failure;
267 }
268
269 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_AGGREGATED_OGMS_ENABLED,
270 value: !!atomic_read(v: &bat_priv->aggregated_ogms)))
271 goto nla_put_failure;
272
273 if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv))
274 goto nla_put_failure;
275
276 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_ISOLATION_MARK,
277 value: bat_priv->isolation_mark))
278 goto nla_put_failure;
279
280 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_ISOLATION_MASK,
281 value: bat_priv->isolation_mark_mask))
282 goto nla_put_failure;
283
284 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_BONDING_ENABLED,
285 value: !!atomic_read(v: &bat_priv->bonding)))
286 goto nla_put_failure;
287
288#ifdef CONFIG_BATMAN_ADV_BLA
289 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
290 value: !!atomic_read(v: &bat_priv->bridge_loop_avoidance)))
291 goto nla_put_failure;
292#endif /* CONFIG_BATMAN_ADV_BLA */
293
294#ifdef CONFIG_BATMAN_ADV_DAT
295 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
296 value: !!atomic_read(v: &bat_priv->distributed_arp_table)))
297 goto nla_put_failure;
298#endif /* CONFIG_BATMAN_ADV_DAT */
299
300 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_FRAGMENTATION_ENABLED,
301 value: !!atomic_read(v: &bat_priv->fragmentation)))
302 goto nla_put_failure;
303
304 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_GW_BANDWIDTH_DOWN,
305 value: atomic_read(v: &bat_priv->gw.bandwidth_down)))
306 goto nla_put_failure;
307
308 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_GW_BANDWIDTH_UP,
309 value: atomic_read(v: &bat_priv->gw.bandwidth_up)))
310 goto nla_put_failure;
311
312 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_GW_MODE,
313 value: atomic_read(v: &bat_priv->gw.mode)))
314 goto nla_put_failure;
315
316 if (bat_priv->algo_ops->gw.get_best_gw_node &&
317 bat_priv->algo_ops->gw.is_eligible) {
318 /* GW selection class is not available if the routing algorithm
319 * in use does not implement the GW API
320 */
321 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_GW_SEL_CLASS,
322 value: atomic_read(v: &bat_priv->gw.sel_class)))
323 goto nla_put_failure;
324 }
325
326 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_HOP_PENALTY,
327 value: atomic_read(v: &bat_priv->hop_penalty)))
328 goto nla_put_failure;
329
330#ifdef CONFIG_BATMAN_ADV_DEBUG
331 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_LOG_LEVEL,
332 value: atomic_read(v: &bat_priv->log_level)))
333 goto nla_put_failure;
334#endif /* CONFIG_BATMAN_ADV_DEBUG */
335
336#ifdef CONFIG_BATMAN_ADV_MCAST
337 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
338 value: !atomic_read(v: &bat_priv->multicast_mode)))
339 goto nla_put_failure;
340
341 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_MULTICAST_FANOUT,
342 value: atomic_read(v: &bat_priv->multicast_fanout)))
343 goto nla_put_failure;
344#endif /* CONFIG_BATMAN_ADV_MCAST */
345
346 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_ORIG_INTERVAL,
347 value: atomic_read(v: &bat_priv->orig_interval)))
348 goto nla_put_failure;
349
350 batadv_hardif_put(hard_iface: primary_if);
351
352 genlmsg_end(skb: msg, hdr);
353 return 0;
354
355nla_put_failure:
356 batadv_hardif_put(hard_iface: primary_if);
357
358 genlmsg_cancel(skb: msg, hdr);
359 return -EMSGSIZE;
360}
361
362/**
363 * batadv_netlink_notify_mesh() - send meshif attributes to listener
364 * @bat_priv: the bat priv with all the mesh interface information
365 *
366 * Return: 0 on success, < 0 on error
367 */
368static int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
369{
370 struct sk_buff *msg;
371 int ret;
372
373 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
374 if (!msg)
375 return -ENOMEM;
376
377 ret = batadv_netlink_mesh_fill(msg, bat_priv, cmd: BATADV_CMD_SET_MESH,
378 portid: 0, seq: 0, flags: 0);
379 if (ret < 0) {
380 nlmsg_free(skb: msg);
381 return ret;
382 }
383
384 genlmsg_multicast_netns(family: &batadv_netlink_family,
385 net: dev_net(dev: bat_priv->mesh_iface), skb: msg, portid: 0,
386 group: BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
387
388 return 0;
389}
390
391/**
392 * batadv_netlink_get_mesh() - Get meshif attributes
393 * @skb: Netlink message with request data
394 * @info: receiver information
395 *
396 * Return: 0 on success or negative error number in case of failure
397 */
398static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info)
399{
400 struct batadv_priv *bat_priv = info->user_ptr[0];
401 struct sk_buff *msg;
402 int ret;
403
404 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
405 if (!msg)
406 return -ENOMEM;
407
408 ret = batadv_netlink_mesh_fill(msg, bat_priv, cmd: BATADV_CMD_GET_MESH,
409 portid: info->snd_portid, seq: info->snd_seq, flags: 0);
410 if (ret < 0) {
411 nlmsg_free(skb: msg);
412 return ret;
413 }
414
415 ret = genlmsg_reply(skb: msg, info);
416
417 return ret;
418}
419
420/**
421 * batadv_netlink_set_mesh() - Set meshif attributes
422 * @skb: Netlink message with request data
423 * @info: receiver information
424 *
425 * Return: 0 on success or negative error number in case of failure
426 */
427static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
428{
429 struct batadv_priv *bat_priv = info->user_ptr[0];
430 struct nlattr *attr;
431
432 if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) {
433 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED];
434
435 atomic_set(v: &bat_priv->aggregated_ogms, i: !!nla_get_u8(nla: attr));
436 }
437
438 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
439 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
440
441 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv);
442 }
443
444 if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) {
445 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK];
446
447 bat_priv->isolation_mark = nla_get_u32(nla: attr);
448 }
449
450 if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) {
451 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK];
452
453 bat_priv->isolation_mark_mask = nla_get_u32(nla: attr);
454 }
455
456 if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) {
457 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED];
458
459 atomic_set(v: &bat_priv->bonding, i: !!nla_get_u8(nla: attr));
460 }
461
462#ifdef CONFIG_BATMAN_ADV_BLA
463 if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) {
464 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED];
465
466 atomic_set(v: &bat_priv->bridge_loop_avoidance,
467 i: !!nla_get_u8(nla: attr));
468 batadv_bla_status_update(net_dev: bat_priv->mesh_iface);
469 }
470#endif /* CONFIG_BATMAN_ADV_BLA */
471
472#ifdef CONFIG_BATMAN_ADV_DAT
473 if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
474 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
475
476 atomic_set(v: &bat_priv->distributed_arp_table,
477 i: !!nla_get_u8(nla: attr));
478 batadv_dat_status_update(net_dev: bat_priv->mesh_iface);
479 }
480#endif /* CONFIG_BATMAN_ADV_DAT */
481
482 if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
483 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
484
485 atomic_set(v: &bat_priv->fragmentation, i: !!nla_get_u8(nla: attr));
486
487 rtnl_lock();
488 batadv_update_min_mtu(mesh_iface: bat_priv->mesh_iface);
489 rtnl_unlock();
490 }
491
492 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {
493 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN];
494
495 atomic_set(v: &bat_priv->gw.bandwidth_down, i: nla_get_u32(nla: attr));
496 batadv_gw_tvlv_container_update(bat_priv);
497 }
498
499 if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) {
500 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP];
501
502 atomic_set(v: &bat_priv->gw.bandwidth_up, i: nla_get_u32(nla: attr));
503 batadv_gw_tvlv_container_update(bat_priv);
504 }
505
506 if (info->attrs[BATADV_ATTR_GW_MODE]) {
507 u8 gw_mode;
508
509 attr = info->attrs[BATADV_ATTR_GW_MODE];
510 gw_mode = nla_get_u8(nla: attr);
511
512 if (gw_mode <= BATADV_GW_MODE_SERVER) {
513 /* Invoking batadv_gw_reselect() is not enough to really
514 * de-select the current GW. It will only instruct the
515 * gateway client code to perform a re-election the next
516 * time that this is needed.
517 *
518 * When gw client mode is being switched off the current
519 * GW must be de-selected explicitly otherwise no GW_ADD
520 * uevent is thrown on client mode re-activation. This
521 * is operation is performed in
522 * batadv_gw_check_client_stop().
523 */
524 batadv_gw_reselect(bat_priv);
525
526 /* always call batadv_gw_check_client_stop() before
527 * changing the gateway state
528 */
529 batadv_gw_check_client_stop(bat_priv);
530 atomic_set(v: &bat_priv->gw.mode, i: gw_mode);
531 batadv_gw_tvlv_container_update(bat_priv);
532 }
533 }
534
535 if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] &&
536 bat_priv->algo_ops->gw.get_best_gw_node &&
537 bat_priv->algo_ops->gw.is_eligible) {
538 /* setting the GW selection class is allowed only if the routing
539 * algorithm in use implements the GW API
540 */
541
542 u32 sel_class_max = bat_priv->algo_ops->gw.sel_class_max;
543 u32 sel_class;
544
545 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
546 sel_class = nla_get_u32(nla: attr);
547
548 if (sel_class >= 1 && sel_class <= sel_class_max) {
549 atomic_set(v: &bat_priv->gw.sel_class, i: sel_class);
550 batadv_gw_reselect(bat_priv);
551 }
552 }
553
554 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
555 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
556
557 atomic_set(v: &bat_priv->hop_penalty, i: nla_get_u8(nla: attr));
558 }
559
560#ifdef CONFIG_BATMAN_ADV_DEBUG
561 if (info->attrs[BATADV_ATTR_LOG_LEVEL]) {
562 attr = info->attrs[BATADV_ATTR_LOG_LEVEL];
563
564 atomic_set(v: &bat_priv->log_level,
565 i: nla_get_u32(nla: attr) & BATADV_DBG_ALL);
566 }
567#endif /* CONFIG_BATMAN_ADV_DEBUG */
568
569#ifdef CONFIG_BATMAN_ADV_MCAST
570 if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) {
571 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
572
573 atomic_set(v: &bat_priv->multicast_mode, i: !nla_get_u8(nla: attr));
574 }
575
576 if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) {
577 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT];
578
579 atomic_set(v: &bat_priv->multicast_fanout, i: nla_get_u32(nla: attr));
580 }
581#endif /* CONFIG_BATMAN_ADV_MCAST */
582
583 if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
584 u32 orig_interval;
585
586 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
587 orig_interval = nla_get_u32(nla: attr);
588
589 orig_interval = min_t(u32, orig_interval, INT_MAX);
590 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
591
592 atomic_set(v: &bat_priv->orig_interval, i: orig_interval);
593 }
594
595 batadv_netlink_notify_mesh(bat_priv);
596
597 return 0;
598}
599
600/**
601 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
602 * @msg: netlink message to be sent back
603 * @cookie: tp meter session cookie
604 *
605 * Return: 0 on success, < 0 on error
606 */
607static int
608batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
609{
610 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_TPMETER_COOKIE, value: cookie))
611 return -ENOBUFS;
612
613 return 0;
614}
615
616/**
617 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
618 * @bat_priv: the bat priv with all the mesh interface information
619 * @dst: destination of tp_meter session
620 * @result: reason for tp meter session stop
621 * @test_time: total time of the tp_meter session
622 * @total_bytes: bytes acked to the receiver
623 * @cookie: cookie of tp_meter session
624 *
625 * Return: 0 on success, < 0 on error
626 */
627int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
628 u8 result, u32 test_time, u64 total_bytes,
629 u32 cookie)
630{
631 struct sk_buff *msg;
632 void *hdr;
633 int ret;
634
635 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
636 if (!msg)
637 return -ENOMEM;
638
639 hdr = genlmsg_put(skb: msg, portid: 0, seq: 0, family: &batadv_netlink_family, flags: 0,
640 cmd: BATADV_CMD_TP_METER);
641 if (!hdr) {
642 ret = -ENOBUFS;
643 goto err_genlmsg;
644 }
645
646 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_TPMETER_COOKIE, value: cookie))
647 goto nla_put_failure;
648
649 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_TPMETER_TEST_TIME, value: test_time))
650 goto nla_put_failure;
651
652 if (nla_put_u64_64bit(skb: msg, attrtype: BATADV_ATTR_TPMETER_BYTES, value: total_bytes,
653 padattr: BATADV_ATTR_PAD))
654 goto nla_put_failure;
655
656 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_TPMETER_RESULT, value: result))
657 goto nla_put_failure;
658
659 if (nla_put(skb: msg, attrtype: BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, data: dst))
660 goto nla_put_failure;
661
662 genlmsg_end(skb: msg, hdr);
663
664 genlmsg_multicast_netns(family: &batadv_netlink_family,
665 net: dev_net(dev: bat_priv->mesh_iface), skb: msg, portid: 0,
666 group: BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
667
668 return 0;
669
670nla_put_failure:
671 genlmsg_cancel(skb: msg, hdr);
672 ret = -EMSGSIZE;
673
674err_genlmsg:
675 nlmsg_free(skb: msg);
676 return ret;
677}
678
679/**
680 * batadv_netlink_tp_meter_start() - Start a new tp_meter session
681 * @skb: received netlink message
682 * @info: receiver information
683 *
684 * Return: 0 on success, < 0 on error
685 */
686static int
687batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
688{
689 struct batadv_priv *bat_priv = info->user_ptr[0];
690 struct sk_buff *msg = NULL;
691 u32 test_length;
692 void *msg_head;
693 u32 cookie;
694 u8 *dst;
695 int ret;
696
697 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
698 return -EINVAL;
699
700 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
701 return -EINVAL;
702
703 dst = nla_data(nla: info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
704
705 test_length = nla_get_u32(nla: info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
706
707 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
708 if (!msg) {
709 ret = -ENOMEM;
710 goto out;
711 }
712
713 msg_head = genlmsg_put(skb: msg, portid: info->snd_portid, seq: info->snd_seq,
714 family: &batadv_netlink_family, flags: 0,
715 cmd: BATADV_CMD_TP_METER);
716 if (!msg_head) {
717 ret = -ENOBUFS;
718 goto out;
719 }
720
721 batadv_tp_start(bat_priv, dst, test_length, cookie: &cookie);
722
723 ret = batadv_netlink_tp_meter_put(msg, cookie);
724
725 out:
726 if (ret) {
727 if (msg)
728 nlmsg_free(skb: msg);
729 return ret;
730 }
731
732 genlmsg_end(skb: msg, hdr: msg_head);
733 return genlmsg_reply(skb: msg, info);
734}
735
736/**
737 * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session
738 * @skb: received netlink message
739 * @info: receiver information
740 *
741 * Return: 0 on success, < 0 on error
742 */
743static int
744batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
745{
746 struct batadv_priv *bat_priv = info->user_ptr[0];
747 u8 *dst;
748 int ret = 0;
749
750 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
751 return -EINVAL;
752
753 dst = nla_data(nla: info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
754
755 batadv_tp_stop(bat_priv, dst, return_value: BATADV_TP_REASON_CANCEL);
756
757 return ret;
758}
759
760/**
761 * batadv_netlink_hardif_fill() - Fill message with hardif attributes
762 * @msg: Netlink message to dump into
763 * @bat_priv: the bat priv with all the mesh interface information
764 * @hard_iface: hard interface which was modified
765 * @cmd: type of message to generate
766 * @portid: Port making netlink request
767 * @seq: sequence number for message
768 * @flags: Additional flags for message
769 * @cb: Control block containing additional options
770 *
771 * Return: 0 on success or negative error number in case of failure
772 */
773static int batadv_netlink_hardif_fill(struct sk_buff *msg,
774 struct batadv_priv *bat_priv,
775 struct batadv_hard_iface *hard_iface,
776 enum batadv_nl_commands cmd,
777 u32 portid, u32 seq, int flags,
778 struct netlink_callback *cb)
779{
780 struct net_device *net_dev = hard_iface->net_dev;
781 void *hdr;
782
783 hdr = genlmsg_put(skb: msg, portid, seq, family: &batadv_netlink_family, flags, cmd);
784 if (!hdr)
785 return -ENOBUFS;
786
787 if (cb)
788 genl_dump_check_consistent(cb, user_hdr: hdr);
789
790 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_MESH_IFINDEX,
791 value: bat_priv->mesh_iface->ifindex))
792 goto nla_put_failure;
793
794 if (nla_put_string(skb: msg, attrtype: BATADV_ATTR_MESH_IFNAME,
795 str: bat_priv->mesh_iface->name))
796 goto nla_put_failure;
797
798 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_HARD_IFINDEX,
799 value: net_dev->ifindex) ||
800 nla_put_string(skb: msg, attrtype: BATADV_ATTR_HARD_IFNAME,
801 str: net_dev->name) ||
802 nla_put(skb: msg, attrtype: BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
803 data: net_dev->dev_addr))
804 goto nla_put_failure;
805
806 if (hard_iface->if_status == BATADV_IF_ACTIVE) {
807 if (nla_put_flag(skb: msg, attrtype: BATADV_ATTR_ACTIVE))
808 goto nla_put_failure;
809 }
810
811 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_HOP_PENALTY,
812 value: atomic_read(v: &hard_iface->hop_penalty)))
813 goto nla_put_failure;
814
815#ifdef CONFIG_BATMAN_ADV_BATMAN_V
816 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_ELP_INTERVAL,
817 value: atomic_read(v: &hard_iface->bat_v.elp_interval)))
818 goto nla_put_failure;
819
820 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_THROUGHPUT_OVERRIDE,
821 value: atomic_read(v: &hard_iface->bat_v.throughput_override)))
822 goto nla_put_failure;
823#endif /* CONFIG_BATMAN_ADV_BATMAN_V */
824
825 genlmsg_end(skb: msg, hdr);
826 return 0;
827
828nla_put_failure:
829 genlmsg_cancel(skb: msg, hdr);
830 return -EMSGSIZE;
831}
832
833/**
834 * batadv_netlink_notify_hardif() - send hardif attributes to listener
835 * @bat_priv: the bat priv with all the mesh interface information
836 * @hard_iface: hard interface which was modified
837 *
838 * Return: 0 on success, < 0 on error
839 */
840static int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
841 struct batadv_hard_iface *hard_iface)
842{
843 struct sk_buff *msg;
844 int ret;
845
846 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
847 if (!msg)
848 return -ENOMEM;
849
850 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
851 cmd: BATADV_CMD_SET_HARDIF, portid: 0, seq: 0, flags: 0, NULL);
852 if (ret < 0) {
853 nlmsg_free(skb: msg);
854 return ret;
855 }
856
857 genlmsg_multicast_netns(family: &batadv_netlink_family,
858 net: dev_net(dev: bat_priv->mesh_iface), skb: msg, portid: 0,
859 group: BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
860
861 return 0;
862}
863
864/**
865 * batadv_netlink_cmd_get_hardif() - Get hardif attributes
866 * @skb: Netlink message with request data
867 * @info: receiver information
868 *
869 * Return: 0 on success or negative error number in case of failure
870 */
871static int batadv_netlink_cmd_get_hardif(struct sk_buff *skb,
872 struct genl_info *info)
873{
874 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
875 struct batadv_priv *bat_priv = info->user_ptr[0];
876 struct sk_buff *msg;
877 int ret;
878
879 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
880 if (!msg)
881 return -ENOMEM;
882
883 ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
884 cmd: BATADV_CMD_GET_HARDIF,
885 portid: info->snd_portid, seq: info->snd_seq, flags: 0,
886 NULL);
887 if (ret < 0) {
888 nlmsg_free(skb: msg);
889 return ret;
890 }
891
892 ret = genlmsg_reply(skb: msg, info);
893
894 return ret;
895}
896
897/**
898 * batadv_netlink_set_hardif() - Set hardif attributes
899 * @skb: Netlink message with request data
900 * @info: receiver information
901 *
902 * Return: 0 on success or negative error number in case of failure
903 */
904static int batadv_netlink_set_hardif(struct sk_buff *skb,
905 struct genl_info *info)
906{
907 struct batadv_hard_iface *hard_iface = info->user_ptr[1];
908 struct batadv_priv *bat_priv = info->user_ptr[0];
909 struct nlattr *attr;
910
911 if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
912 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
913
914 atomic_set(v: &hard_iface->hop_penalty, i: nla_get_u8(nla: attr));
915 }
916
917#ifdef CONFIG_BATMAN_ADV_BATMAN_V
918
919 if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) {
920 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL];
921
922 atomic_set(v: &hard_iface->bat_v.elp_interval, i: nla_get_u32(nla: attr));
923 }
924
925 if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) {
926 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE];
927
928 atomic_set(v: &hard_iface->bat_v.throughput_override,
929 i: nla_get_u32(nla: attr));
930 }
931#endif /* CONFIG_BATMAN_ADV_BATMAN_V */
932
933 batadv_netlink_notify_hardif(bat_priv, hard_iface);
934
935 return 0;
936}
937
938/**
939 * batadv_netlink_dump_hardif() - Dump all hard interface into a messages
940 * @msg: Netlink message to dump into
941 * @cb: Parameters from query
942 *
943 * Return: error code, or length of reply message on success
944 */
945static int
946batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb)
947{
948 struct net_device *mesh_iface;
949 struct batadv_hard_iface *hard_iface;
950 struct batadv_priv *bat_priv;
951 int portid = NETLINK_CB(cb->skb).portid;
952 int skip = cb->args[0];
953 struct list_head *iter;
954 int i = 0;
955
956 mesh_iface = batadv_netlink_get_meshif(cb);
957 if (IS_ERR(ptr: mesh_iface))
958 return PTR_ERR(ptr: mesh_iface);
959
960 bat_priv = netdev_priv(dev: mesh_iface);
961
962 rtnl_lock();
963 cb->seq = batadv_hardif_generation << 1 | 1;
964
965 netdev_for_each_lower_private(mesh_iface, hard_iface, iter) {
966 if (i++ < skip)
967 continue;
968
969 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
970 cmd: BATADV_CMD_GET_HARDIF,
971 portid, seq: cb->nlh->nlmsg_seq,
972 NLM_F_MULTI, cb)) {
973 i--;
974 break;
975 }
976 }
977
978 rtnl_unlock();
979
980 dev_put(dev: mesh_iface);
981
982 cb->args[0] = i;
983
984 return msg->len;
985}
986
987/**
988 * batadv_netlink_vlan_fill() - Fill message with vlan attributes
989 * @msg: Netlink message to dump into
990 * @bat_priv: the bat priv with all the mesh interface information
991 * @vlan: vlan which was modified
992 * @cmd: type of message to generate
993 * @portid: Port making netlink request
994 * @seq: sequence number for message
995 * @flags: Additional flags for message
996 *
997 * Return: 0 on success or negative error number in case of failure
998 */
999static int batadv_netlink_vlan_fill(struct sk_buff *msg,
1000 struct batadv_priv *bat_priv,
1001 struct batadv_meshif_vlan *vlan,
1002 enum batadv_nl_commands cmd,
1003 u32 portid, u32 seq, int flags)
1004{
1005 void *hdr;
1006
1007 hdr = genlmsg_put(skb: msg, portid, seq, family: &batadv_netlink_family, flags, cmd);
1008 if (!hdr)
1009 return -ENOBUFS;
1010
1011 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_MESH_IFINDEX,
1012 value: bat_priv->mesh_iface->ifindex))
1013 goto nla_put_failure;
1014
1015 if (nla_put_string(skb: msg, attrtype: BATADV_ATTR_MESH_IFNAME,
1016 str: bat_priv->mesh_iface->name))
1017 goto nla_put_failure;
1018
1019 if (nla_put_u32(skb: msg, attrtype: BATADV_ATTR_VLANID, value: vlan->vid & VLAN_VID_MASK))
1020 goto nla_put_failure;
1021
1022 if (nla_put_u8(skb: msg, attrtype: BATADV_ATTR_AP_ISOLATION_ENABLED,
1023 value: !!atomic_read(v: &vlan->ap_isolation)))
1024 goto nla_put_failure;
1025
1026 genlmsg_end(skb: msg, hdr);
1027 return 0;
1028
1029nla_put_failure:
1030 genlmsg_cancel(skb: msg, hdr);
1031 return -EMSGSIZE;
1032}
1033
1034/**
1035 * batadv_netlink_notify_vlan() - send vlan attributes to listener
1036 * @bat_priv: the bat priv with all the mesh interface information
1037 * @vlan: vlan which was modified
1038 *
1039 * Return: 0 on success, < 0 on error
1040 */
1041static int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
1042 struct batadv_meshif_vlan *vlan)
1043{
1044 struct sk_buff *msg;
1045 int ret;
1046
1047 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1048 if (!msg)
1049 return -ENOMEM;
1050
1051 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan,
1052 cmd: BATADV_CMD_SET_VLAN, portid: 0, seq: 0, flags: 0);
1053 if (ret < 0) {
1054 nlmsg_free(skb: msg);
1055 return ret;
1056 }
1057
1058 genlmsg_multicast_netns(family: &batadv_netlink_family,
1059 net: dev_net(dev: bat_priv->mesh_iface), skb: msg, portid: 0,
1060 group: BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
1061
1062 return 0;
1063}
1064
1065/**
1066 * batadv_netlink_get_vlan() - Get vlan attributes
1067 * @skb: Netlink message with request data
1068 * @info: receiver information
1069 *
1070 * Return: 0 on success or negative error number in case of failure
1071 */
1072static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info)
1073{
1074 struct batadv_meshif_vlan *vlan = info->user_ptr[1];
1075 struct batadv_priv *bat_priv = info->user_ptr[0];
1076 struct sk_buff *msg;
1077 int ret;
1078
1079 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1080 if (!msg)
1081 return -ENOMEM;
1082
1083 ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, cmd: BATADV_CMD_GET_VLAN,
1084 portid: info->snd_portid, seq: info->snd_seq, flags: 0);
1085 if (ret < 0) {
1086 nlmsg_free(skb: msg);
1087 return ret;
1088 }
1089
1090 ret = genlmsg_reply(skb: msg, info);
1091
1092 return ret;
1093}
1094
1095/**
1096 * batadv_netlink_set_vlan() - Get vlan attributes
1097 * @skb: Netlink message with request data
1098 * @info: receiver information
1099 *
1100 * Return: 0 on success or negative error number in case of failure
1101 */
1102static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info)
1103{
1104 struct batadv_meshif_vlan *vlan = info->user_ptr[1];
1105 struct batadv_priv *bat_priv = info->user_ptr[0];
1106 struct nlattr *attr;
1107
1108 if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
1109 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
1110
1111 atomic_set(v: &vlan->ap_isolation, i: !!nla_get_u8(nla: attr));
1112 }
1113
1114 batadv_netlink_notify_vlan(bat_priv, vlan);
1115
1116 return 0;
1117}
1118
1119/**
1120 * batadv_netlink_get_meshif_from_ifindex() - Get mesh-iface from ifindex
1121 * @net: the applicable net namespace
1122 * @ifindex: index of the mesh interface
1123 *
1124 * Return: Pointer to mesh interface (with increased refcnt) on success, error
1125 * pointer on error
1126 */
1127static struct net_device *
1128batadv_netlink_get_meshif_from_ifindex(struct net *net, int ifindex)
1129{
1130 struct net_device *mesh_iface;
1131
1132 mesh_iface = dev_get_by_index(net, ifindex);
1133 if (!mesh_iface)
1134 return ERR_PTR(error: -ENODEV);
1135
1136 if (!batadv_meshif_is_valid(net_dev: mesh_iface))
1137 goto err_put_meshif;
1138
1139 return mesh_iface;
1140
1141err_put_meshif:
1142 dev_put(dev: mesh_iface);
1143
1144 return ERR_PTR(error: -EINVAL);
1145}
1146
1147/**
1148 * batadv_netlink_get_meshif_from_info() - Get mesh-iface from genl attributes
1149 * @net: the applicable net namespace
1150 * @info: receiver information
1151 *
1152 * Return: Pointer to mesh interface (with increased refcnt) on success, error
1153 * pointer on error
1154 */
1155static struct net_device *
1156batadv_netlink_get_meshif_from_info(struct net *net, struct genl_info *info)
1157{
1158 int ifindex;
1159
1160 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
1161 return ERR_PTR(error: -EINVAL);
1162
1163 ifindex = nla_get_u32(nla: info->attrs[BATADV_ATTR_MESH_IFINDEX]);
1164
1165 return batadv_netlink_get_meshif_from_ifindex(net, ifindex);
1166}
1167
1168/**
1169 * batadv_netlink_get_meshif() - Retrieve mesh interface from netlink callback
1170 * @cb: callback structure containing arguments
1171 *
1172 * Return: Pointer to mesh interface (with increased refcnt) on success, error
1173 * pointer on error
1174 */
1175struct net_device *batadv_netlink_get_meshif(struct netlink_callback *cb)
1176{
1177 int ifindex = batadv_netlink_get_ifindex(nlh: cb->nlh,
1178 attrtype: BATADV_ATTR_MESH_IFINDEX);
1179 if (!ifindex)
1180 return ERR_PTR(error: -ENONET);
1181
1182 return batadv_netlink_get_meshif_from_ifindex(net: sock_net(sk: cb->skb->sk),
1183 ifindex);
1184}
1185
1186/**
1187 * batadv_netlink_get_hardif_from_ifindex() - Get hard-iface from ifindex
1188 * @bat_priv: the bat priv with all the mesh interface information
1189 * @net: the applicable net namespace
1190 * @ifindex: index of the hard interface
1191 *
1192 * Return: Pointer to hard interface (with increased refcnt) on success, error
1193 * pointer on error
1194 */
1195static struct batadv_hard_iface *
1196batadv_netlink_get_hardif_from_ifindex(struct batadv_priv *bat_priv,
1197 struct net *net, int ifindex)
1198{
1199 struct batadv_hard_iface *hard_iface;
1200 struct net_device *hard_dev;
1201
1202 hard_dev = dev_get_by_index(net, ifindex);
1203 if (!hard_dev)
1204 return ERR_PTR(error: -ENODEV);
1205
1206 hard_iface = batadv_hardif_get_by_netdev(net_dev: hard_dev);
1207 if (!hard_iface)
1208 goto err_put_harddev;
1209
1210 if (hard_iface->mesh_iface != bat_priv->mesh_iface)
1211 goto err_put_hardif;
1212
1213 /* hard_dev is referenced by hard_iface and not needed here */
1214 dev_put(dev: hard_dev);
1215
1216 return hard_iface;
1217
1218err_put_hardif:
1219 batadv_hardif_put(hard_iface);
1220err_put_harddev:
1221 dev_put(dev: hard_dev);
1222
1223 return ERR_PTR(error: -EINVAL);
1224}
1225
1226/**
1227 * batadv_netlink_get_hardif_from_info() - Get hard-iface from genl attributes
1228 * @bat_priv: the bat priv with all the mesh interface information
1229 * @net: the applicable net namespace
1230 * @info: receiver information
1231 *
1232 * Return: Pointer to hard interface (with increased refcnt) on success, error
1233 * pointer on error
1234 */
1235static struct batadv_hard_iface *
1236batadv_netlink_get_hardif_from_info(struct batadv_priv *bat_priv,
1237 struct net *net, struct genl_info *info)
1238{
1239 int ifindex;
1240
1241 if (!info->attrs[BATADV_ATTR_HARD_IFINDEX])
1242 return ERR_PTR(error: -EINVAL);
1243
1244 ifindex = nla_get_u32(nla: info->attrs[BATADV_ATTR_HARD_IFINDEX]);
1245
1246 return batadv_netlink_get_hardif_from_ifindex(bat_priv, net, ifindex);
1247}
1248
1249/**
1250 * batadv_netlink_get_hardif() - Retrieve hard interface from netlink callback
1251 * @bat_priv: the bat priv with all the mesh interface information
1252 * @cb: callback structure containing arguments
1253 *
1254 * Return: Pointer to hard interface (with increased refcnt) on success, error
1255 * pointer on error
1256 */
1257struct batadv_hard_iface *
1258batadv_netlink_get_hardif(struct batadv_priv *bat_priv,
1259 struct netlink_callback *cb)
1260{
1261 int ifindex = batadv_netlink_get_ifindex(nlh: cb->nlh,
1262 attrtype: BATADV_ATTR_HARD_IFINDEX);
1263 if (!ifindex)
1264 return ERR_PTR(error: -ENONET);
1265
1266 return batadv_netlink_get_hardif_from_ifindex(bat_priv,
1267 net: sock_net(sk: cb->skb->sk),
1268 ifindex);
1269}
1270
1271/**
1272 * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes
1273 * @bat_priv: the bat priv with all the mesh interface information
1274 * @net: the applicable net namespace
1275 * @info: receiver information
1276 *
1277 * Return: Pointer to vlan on success (with increased refcnt), error pointer
1278 * on error
1279 */
1280static struct batadv_meshif_vlan *
1281batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net,
1282 struct genl_info *info)
1283{
1284 struct batadv_meshif_vlan *vlan;
1285 u16 vid;
1286
1287 if (!info->attrs[BATADV_ATTR_VLANID])
1288 return ERR_PTR(error: -EINVAL);
1289
1290 vid = nla_get_u16(nla: info->attrs[BATADV_ATTR_VLANID]);
1291
1292 vlan = batadv_meshif_vlan_get(bat_priv, vid: vid | BATADV_VLAN_HAS_TAG);
1293 if (!vlan)
1294 return ERR_PTR(error: -ENOENT);
1295
1296 return vlan;
1297}
1298
1299/**
1300 * batadv_pre_doit() - Prepare batman-adv genl doit request
1301 * @ops: requested netlink operation
1302 * @skb: Netlink message with request data
1303 * @info: receiver information
1304 *
1305 * Return: 0 on success or negative error number in case of failure
1306 */
1307static int batadv_pre_doit(const struct genl_split_ops *ops,
1308 struct sk_buff *skb,
1309 struct genl_info *info)
1310{
1311 struct net *net = genl_info_net(info);
1312 struct batadv_hard_iface *hard_iface;
1313 struct batadv_priv *bat_priv = NULL;
1314 struct batadv_meshif_vlan *vlan;
1315 struct net_device *mesh_iface;
1316 u8 user_ptr1_flags;
1317 u8 mesh_dep_flags;
1318 int ret;
1319
1320 user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1321 if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1))
1322 return -EINVAL;
1323
1324 mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1325 if (WARN_ON((ops->internal_flags & mesh_dep_flags) &&
1326 (~ops->internal_flags & BATADV_FLAG_NEED_MESH)))
1327 return -EINVAL;
1328
1329 if (ops->internal_flags & BATADV_FLAG_NEED_MESH) {
1330 mesh_iface = batadv_netlink_get_meshif_from_info(net, info);
1331 if (IS_ERR(ptr: mesh_iface))
1332 return PTR_ERR(ptr: mesh_iface);
1333
1334 bat_priv = netdev_priv(dev: mesh_iface);
1335 info->user_ptr[0] = bat_priv;
1336 }
1337
1338 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) {
1339 hard_iface = batadv_netlink_get_hardif_from_info(bat_priv, net,
1340 info);
1341 if (IS_ERR(ptr: hard_iface)) {
1342 ret = PTR_ERR(ptr: hard_iface);
1343 goto err_put_meshif;
1344 }
1345
1346 info->user_ptr[1] = hard_iface;
1347 }
1348
1349 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) {
1350 vlan = batadv_get_vlan_from_info(bat_priv, net, info);
1351 if (IS_ERR(ptr: vlan)) {
1352 ret = PTR_ERR(ptr: vlan);
1353 goto err_put_meshif;
1354 }
1355
1356 info->user_ptr[1] = vlan;
1357 }
1358
1359 return 0;
1360
1361err_put_meshif:
1362 if (bat_priv)
1363 dev_put(dev: bat_priv->mesh_iface);
1364
1365 return ret;
1366}
1367
1368/**
1369 * batadv_post_doit() - End batman-adv genl doit request
1370 * @ops: requested netlink operation
1371 * @skb: Netlink message with request data
1372 * @info: receiver information
1373 */
1374static void batadv_post_doit(const struct genl_split_ops *ops,
1375 struct sk_buff *skb,
1376 struct genl_info *info)
1377{
1378 struct batadv_hard_iface *hard_iface;
1379 struct batadv_meshif_vlan *vlan;
1380 struct batadv_priv *bat_priv;
1381
1382 if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF &&
1383 info->user_ptr[1]) {
1384 hard_iface = info->user_ptr[1];
1385
1386 batadv_hardif_put(hard_iface);
1387 }
1388
1389 if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) {
1390 vlan = info->user_ptr[1];
1391 batadv_meshif_vlan_put(vlan);
1392 }
1393
1394 if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) {
1395 bat_priv = info->user_ptr[0];
1396 dev_put(dev: bat_priv->mesh_iface);
1397 }
1398}
1399
1400static const struct genl_small_ops batadv_netlink_ops[] = {
1401 {
1402 .cmd = BATADV_CMD_GET_MESH,
1403 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1404 /* can be retrieved by unprivileged users */
1405 .doit = batadv_netlink_get_mesh,
1406 .internal_flags = BATADV_FLAG_NEED_MESH,
1407 },
1408 {
1409 .cmd = BATADV_CMD_TP_METER,
1410 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1411 .flags = GENL_UNS_ADMIN_PERM,
1412 .doit = batadv_netlink_tp_meter_start,
1413 .internal_flags = BATADV_FLAG_NEED_MESH,
1414 },
1415 {
1416 .cmd = BATADV_CMD_TP_METER_CANCEL,
1417 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1418 .flags = GENL_UNS_ADMIN_PERM,
1419 .doit = batadv_netlink_tp_meter_cancel,
1420 .internal_flags = BATADV_FLAG_NEED_MESH,
1421 },
1422 {
1423 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
1424 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1425 .flags = GENL_UNS_ADMIN_PERM,
1426 .dumpit = batadv_algo_dump,
1427 },
1428 {
1429 .cmd = BATADV_CMD_GET_HARDIF,
1430 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1431 /* can be retrieved by unprivileged users */
1432 .dumpit = batadv_netlink_dump_hardif,
1433 .doit = batadv_netlink_cmd_get_hardif,
1434 .internal_flags = BATADV_FLAG_NEED_MESH |
1435 BATADV_FLAG_NEED_HARDIF,
1436 },
1437 {
1438 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
1439 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1440 .flags = GENL_UNS_ADMIN_PERM,
1441 .dumpit = batadv_tt_local_dump,
1442 },
1443 {
1444 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
1445 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1446 .flags = GENL_UNS_ADMIN_PERM,
1447 .dumpit = batadv_tt_global_dump,
1448 },
1449 {
1450 .cmd = BATADV_CMD_GET_ORIGINATORS,
1451 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1452 .flags = GENL_UNS_ADMIN_PERM,
1453 .dumpit = batadv_orig_dump,
1454 },
1455 {
1456 .cmd = BATADV_CMD_GET_NEIGHBORS,
1457 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1458 .flags = GENL_UNS_ADMIN_PERM,
1459 .dumpit = batadv_hardif_neigh_dump,
1460 },
1461 {
1462 .cmd = BATADV_CMD_GET_GATEWAYS,
1463 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1464 .flags = GENL_UNS_ADMIN_PERM,
1465 .dumpit = batadv_gw_dump,
1466 },
1467 {
1468 .cmd = BATADV_CMD_GET_BLA_CLAIM,
1469 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1470 .flags = GENL_UNS_ADMIN_PERM,
1471 .dumpit = batadv_bla_claim_dump,
1472 },
1473 {
1474 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
1475 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1476 .flags = GENL_UNS_ADMIN_PERM,
1477 .dumpit = batadv_bla_backbone_dump,
1478 },
1479 {
1480 .cmd = BATADV_CMD_GET_DAT_CACHE,
1481 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1482 .flags = GENL_UNS_ADMIN_PERM,
1483 .dumpit = batadv_dat_cache_dump,
1484 },
1485 {
1486 .cmd = BATADV_CMD_GET_MCAST_FLAGS,
1487 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1488 .flags = GENL_UNS_ADMIN_PERM,
1489 .dumpit = batadv_mcast_flags_dump,
1490 },
1491 {
1492 .cmd = BATADV_CMD_SET_MESH,
1493 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1494 .flags = GENL_UNS_ADMIN_PERM,
1495 .doit = batadv_netlink_set_mesh,
1496 .internal_flags = BATADV_FLAG_NEED_MESH,
1497 },
1498 {
1499 .cmd = BATADV_CMD_SET_HARDIF,
1500 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1501 .flags = GENL_UNS_ADMIN_PERM,
1502 .doit = batadv_netlink_set_hardif,
1503 .internal_flags = BATADV_FLAG_NEED_MESH |
1504 BATADV_FLAG_NEED_HARDIF,
1505 },
1506 {
1507 .cmd = BATADV_CMD_GET_VLAN,
1508 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1509 /* can be retrieved by unprivileged users */
1510 .doit = batadv_netlink_get_vlan,
1511 .internal_flags = BATADV_FLAG_NEED_MESH |
1512 BATADV_FLAG_NEED_VLAN,
1513 },
1514 {
1515 .cmd = BATADV_CMD_SET_VLAN,
1516 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1517 .flags = GENL_UNS_ADMIN_PERM,
1518 .doit = batadv_netlink_set_vlan,
1519 .internal_flags = BATADV_FLAG_NEED_MESH |
1520 BATADV_FLAG_NEED_VLAN,
1521 },
1522};
1523
1524struct genl_family batadv_netlink_family __ro_after_init = {
1525 .hdrsize = 0,
1526 .name = BATADV_NL_NAME,
1527 .version = 1,
1528 .maxattr = BATADV_ATTR_MAX,
1529 .policy = batadv_netlink_policy,
1530 .netnsok = true,
1531 .pre_doit = batadv_pre_doit,
1532 .post_doit = batadv_post_doit,
1533 .module = THIS_MODULE,
1534 .small_ops = batadv_netlink_ops,
1535 .n_small_ops = ARRAY_SIZE(batadv_netlink_ops),
1536 .resv_start_op = BATADV_CMD_SET_VLAN + 1,
1537 .mcgrps = batadv_netlink_mcgrps,
1538 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
1539};
1540
1541/**
1542 * batadv_netlink_register() - register batadv genl netlink family
1543 */
1544void __init batadv_netlink_register(void)
1545{
1546 int ret;
1547
1548 ret = genl_register_family(family: &batadv_netlink_family);
1549 if (ret)
1550 pr_warn("unable to register netlink family\n");
1551}
1552
1553/**
1554 * batadv_netlink_unregister() - unregister batadv genl netlink family
1555 */
1556void batadv_netlink_unregister(void)
1557{
1558 genl_unregister_family(family: &batadv_netlink_family);
1559}
1560

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