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add debugging code
[cor.git] / net / batman-adv / sysfs.c
blobe5bbc28ed12c3a221a6b1a06d4379d406da0e9da
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2010-2019 B.A.T.M.A.N. contributors:
3 *
4 * Marek Lindner
5 */
6
7 #include "sysfs.h"
8 #include "main.h"
9
10 #include <asm/current.h>
11 #include <linux/atomic.h>
12 #include <linux/compiler.h>
13 #include <linux/device.h>
14 #include <linux/errno.h>
15 #include <linux/gfp.h>
16 #include <linux/if.h>
17 #include <linux/if_vlan.h>
18 #include <linux/kernel.h>
19 #include <linux/kobject.h>
20 #include <linux/kref.h>
21 #include <linux/limits.h>
22 #include <linux/netdevice.h>
23 #include <linux/printk.h>
24 #include <linux/rculist.h>
25 #include <linux/rcupdate.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/sched.h>
28 #include <linux/slab.h>
29 #include <linux/stddef.h>
30 #include <linux/string.h>
31 #include <linux/stringify.h>
32 #include <linux/workqueue.h>
33 #include <uapi/linux/batadv_packet.h>
34 #include <uapi/linux/batman_adv.h>
35
36 #include "bridge_loop_avoidance.h"
37 #include "distributed-arp-table.h"
38 #include "gateway_client.h"
39 #include "gateway_common.h"
40 #include "hard-interface.h"
41 #include "log.h"
42 #include "netlink.h"
43 #include "network-coding.h"
44 #include "soft-interface.h"
45
46 /**
47 * batadv_sysfs_deprecated() - Log use of deprecated batadv sysfs access
48 * @attr: attribute which was accessed
49 */
50 static void batadv_sysfs_deprecated(struct attribute *attr)
51 {
52 pr_warn_ratelimited(DEPRECATED "%s (pid %d) Use of sysfs file \"%s\".\nUse batadv genl family instead",
53 current->comm, task_pid_nr(current), attr->name);
54 }
55
56 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
57 {
58 struct device *dev = container_of(obj->parent, struct device, kobj);
59
60 return to_net_dev(dev);
61 }
62
63 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
64 {
65 struct net_device *net_dev = batadv_kobj_to_netdev(obj);
66
67 return netdev_priv(net_dev);
68 }
69
70 /**
71 * batadv_vlan_kobj_to_batpriv() - convert a vlan kobj in the associated batpriv
72 * @obj: kobject to covert
73 *
74 * Return: the associated batadv_priv struct.
75 */
76 static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
77 {
78 /* VLAN specific attributes are located in the root sysfs folder if they
79 * refer to the untagged VLAN..
80 */
81 if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
82 return batadv_kobj_to_batpriv(obj);
83
84 /* ..while the attributes for the tagged vlans are located in
85 * the in the corresponding "vlan%VID" subfolder
86 */
87 return batadv_kobj_to_batpriv(obj->parent);
88 }
89
90 /**
91 * batadv_kobj_to_vlan() - convert a kobj in the associated softif_vlan struct
92 * @bat_priv: the bat priv with all the soft interface information
93 * @obj: kobject to covert
94 *
95 * Return: the associated softif_vlan struct if found, NULL otherwise.
96 */
97 static struct batadv_softif_vlan *
98 batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
99 {
100 struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
101
102 rcu_read_lock();
103 hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
104 if (vlan_tmp->kobj != obj)
105 continue;
106
107 if (!kref_get_unless_zero(&vlan_tmp->refcount))
108 continue;
109
110 vlan = vlan_tmp;
111 break;
112 }
113 rcu_read_unlock();
114
115 return vlan;
116 }
117
118 /* Use this, if you have customized show and store functions for vlan attrs */
119 #define BATADV_ATTR_VLAN(_name, _mode, _show, _store) \
120 struct batadv_attribute batadv_attr_vlan_##_name = { \
121 .attr = {.name = __stringify(_name), \
122 .mode = _mode }, \
123 .show = _show, \
124 .store = _store, \
125 }
126
127 /* Use this, if you have customized show and store functions */
128 #define BATADV_ATTR(_name, _mode, _show, _store) \
129 struct batadv_attribute batadv_attr_##_name = { \
130 .attr = {.name = __stringify(_name), \
131 .mode = _mode }, \
132 .show = _show, \
133 .store = _store, \
134 }
135
136 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \
137 ssize_t batadv_store_##_name(struct kobject *kobj, \
138 struct attribute *attr, char *buff, \
139 size_t count) \
140 { \
141 struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
142 struct batadv_priv *bat_priv = netdev_priv(net_dev); \
143 ssize_t length; \
144 \
145 batadv_sysfs_deprecated(attr); \
146 length = __batadv_store_bool_attr(buff, count, _post_func, attr,\
147 &bat_priv->_name, net_dev); \
148 \
149 batadv_netlink_notify_mesh(bat_priv); \
150 \
151 return length; \
152 }
153
154 #define BATADV_ATTR_SIF_SHOW_BOOL(_name) \
155 ssize_t batadv_show_##_name(struct kobject *kobj, \
156 struct attribute *attr, char *buff) \
157 { \
158 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \
159 \
160 batadv_sysfs_deprecated(attr); \
161 return sprintf(buff, "%s\n", \
162 atomic_read(&bat_priv->_name) == 0 ? \
163 "disabled" : "enabled"); \
164 } \
165
166 /* Use this, if you are going to turn a [name] in the soft-interface
167 * (bat_priv) on or off
168 */
169 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func) \
170 static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \
171 static BATADV_ATTR_SIF_SHOW_BOOL(_name) \
172 static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
173 batadv_store_##_name)
174
175 #define BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
176 ssize_t batadv_store_##_name(struct kobject *kobj, \
177 struct attribute *attr, char *buff, \
178 size_t count) \
179 { \
180 struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
181 struct batadv_priv *bat_priv = netdev_priv(net_dev); \
182 ssize_t length; \
183 \
184 batadv_sysfs_deprecated(attr); \
185 length = __batadv_store_uint_attr(buff, count, _min, _max, \
186 _post_func, attr, \
187 &bat_priv->_var, net_dev, \
188 NULL); \
189 \
190 batadv_netlink_notify_mesh(bat_priv); \
191 \
192 return length; \
193 }
194
195 #define BATADV_ATTR_SIF_SHOW_UINT(_name, _var) \
196 ssize_t batadv_show_##_name(struct kobject *kobj, \
197 struct attribute *attr, char *buff) \
198 { \
199 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \
200 \
201 batadv_sysfs_deprecated(attr); \
202 return sprintf(buff, "%i\n", atomic_read(&bat_priv->_var)); \
203 } \
204
205 /* Use this, if you are going to set [name] in the soft-interface
206 * (bat_priv) to an unsigned integer value
207 */
208 #define BATADV_ATTR_SIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
209 static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\
210 static BATADV_ATTR_SIF_SHOW_UINT(_name, _var) \
211 static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
212 batadv_store_##_name)
213
214 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func) \
215 ssize_t batadv_store_vlan_##_name(struct kobject *kobj, \
216 struct attribute *attr, char *buff, \
217 size_t count) \
218 { \
219 struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
220 struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
221 kobj); \
222 size_t res = __batadv_store_bool_attr(buff, count, _post_func, \
223 attr, &vlan->_name, \
224 bat_priv->soft_iface); \
225 \
226 batadv_sysfs_deprecated(attr); \
227 if (vlan->vid) \
228 batadv_netlink_notify_vlan(bat_priv, vlan); \
229 else \
230 batadv_netlink_notify_mesh(bat_priv); \
231 \
232 batadv_softif_vlan_put(vlan); \
233 return res; \
234 }
235
236 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name) \
237 ssize_t batadv_show_vlan_##_name(struct kobject *kobj, \
238 struct attribute *attr, char *buff) \
239 { \
240 struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
241 struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
242 kobj); \
243 size_t res = sprintf(buff, "%s\n", \
244 atomic_read(&vlan->_name) == 0 ? \
245 "disabled" : "enabled"); \
246 \
247 batadv_sysfs_deprecated(attr); \
248 batadv_softif_vlan_put(vlan); \
249 return res; \
250 }
251
252 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
253 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func) \
254 static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func) \
255 static BATADV_ATTR_VLAN_SHOW_BOOL(_name) \
256 static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
257 batadv_store_vlan_##_name)
258
259 #define BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
260 ssize_t batadv_store_##_name(struct kobject *kobj, \
261 struct attribute *attr, char *buff, \
262 size_t count) \
263 { \
264 struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
265 struct batadv_hard_iface *hard_iface; \
266 struct batadv_priv *bat_priv; \
267 ssize_t length; \
268 \
269 batadv_sysfs_deprecated(attr); \
270 hard_iface = batadv_hardif_get_by_netdev(net_dev); \
271 if (!hard_iface) \
272 return 0; \
273 \
274 length = __batadv_store_uint_attr(buff, count, _min, _max, \
275 _post_func, attr, \
276 &hard_iface->_var, \
277 hard_iface->soft_iface, \
278 net_dev); \
279 \
280 if (hard_iface->soft_iface) { \
281 bat_priv = netdev_priv(hard_iface->soft_iface); \
282 batadv_netlink_notify_hardif(bat_priv, hard_iface); \
283 } \
284 \
285 batadv_hardif_put(hard_iface); \
286 return length; \
287 }
288
289 #define BATADV_ATTR_HIF_SHOW_UINT(_name, _var) \
290 ssize_t batadv_show_##_name(struct kobject *kobj, \
291 struct attribute *attr, char *buff) \
292 { \
293 struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
294 struct batadv_hard_iface *hard_iface; \
295 ssize_t length; \
296 \
297 batadv_sysfs_deprecated(attr); \
298 hard_iface = batadv_hardif_get_by_netdev(net_dev); \
299 if (!hard_iface) \
300 return 0; \
301 \
302 length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_var)); \
303 \
304 batadv_hardif_put(hard_iface); \
305 return length; \
306 }
307
308 /* Use this, if you are going to set [name] in hard_iface to an
309 * unsigned integer value
310 */
311 #define BATADV_ATTR_HIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
312 static BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, \
313 _max, _post_func) \
314 static BATADV_ATTR_HIF_SHOW_UINT(_name, _var) \
315 static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
316 batadv_store_##_name)
317
318 static int batadv_store_bool_attr(char *buff, size_t count,
319 struct net_device *net_dev,
320 const char *attr_name, atomic_t *attr,
321 bool *changed)
322 {
323 int enabled = -1;
324
325 *changed = false;
326
327 if (buff[count - 1] == '\n')
328 buff[count - 1] = '\0';
329
330 if ((strncmp(buff, "1", 2) == 0) ||
331 (strncmp(buff, "enable", 7) == 0) ||
332 (strncmp(buff, "enabled", 8) == 0))
333 enabled = 1;
334
335 if ((strncmp(buff, "0", 2) == 0) ||
336 (strncmp(buff, "disable", 8) == 0) ||
337 (strncmp(buff, "disabled", 9) == 0))
338 enabled = 0;
339
340 if (enabled < 0) {
341 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
342 attr_name, buff);
343 return -EINVAL;
344 }
345
346 if (atomic_read(attr) == enabled)
347 return count;
348
349 batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
350 atomic_read(attr) == 1 ? "enabled" : "disabled",
351 enabled == 1 ? "enabled" : "disabled");
352
353 *changed = true;
354
355 atomic_set(attr, (unsigned int)enabled);
356 return count;
357 }
358
359 static inline ssize_t
360 __batadv_store_bool_attr(char *buff, size_t count,
361 void (*post_func)(struct net_device *),
362 struct attribute *attr,
363 atomic_t *attr_store, struct net_device *net_dev)
364 {
365 bool changed;
366 int ret;
367
368 ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
369 attr_store, &changed);
370 if (post_func && changed)
371 post_func(net_dev);
372
373 return ret;
374 }
375
376 static int batadv_store_uint_attr(const char *buff, size_t count,
377 struct net_device *net_dev,
378 struct net_device *slave_dev,
379 const char *attr_name,
380 unsigned int min, unsigned int max,
381 atomic_t *attr)
382 {
383 char ifname[IFNAMSIZ + 3] = "";
384 unsigned long uint_val;
385 int ret;
386
387 ret = kstrtoul(buff, 10, &uint_val);
388 if (ret) {
389 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
390 attr_name, buff);
391 return -EINVAL;
392 }
393
394 if (uint_val < min) {
395 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
396 attr_name, uint_val, min);
397 return -EINVAL;
398 }
399
400 if (uint_val > max) {
401 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
402 attr_name, uint_val, max);
403 return -EINVAL;
404 }
405
406 if (atomic_read(attr) == uint_val)
407 return count;
408
409 if (slave_dev)
410 snprintf(ifname, sizeof(ifname), "%s: ", slave_dev->name);
411
412 batadv_info(net_dev, "%s: %sChanging from: %i to: %lu\n",
413 attr_name, ifname, atomic_read(attr), uint_val);
414
415 atomic_set(attr, uint_val);
416 return count;
417 }
418
419 static ssize_t __batadv_store_uint_attr(const char *buff, size_t count,
420 int min, int max,
421 void (*post_func)(struct net_device *),
422 const struct attribute *attr,
423 atomic_t *attr_store,
424 struct net_device *net_dev,
425 struct net_device *slave_dev)
426 {
427 int ret;
428
429 ret = batadv_store_uint_attr(buff, count, net_dev, slave_dev,
430 attr->name, min, max, attr_store);
431 if (post_func && ret)
432 post_func(net_dev);
433
434 return ret;
435 }
436
437 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
438 struct attribute *attr, char *buff)
439 {
440 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
441
442 batadv_sysfs_deprecated(attr);
443 return sprintf(buff, "%s\n", bat_priv->algo_ops->name);
444 }
445
446 static void batadv_post_gw_reselect(struct net_device *net_dev)
447 {
448 struct batadv_priv *bat_priv = netdev_priv(net_dev);
449
450 batadv_gw_reselect(bat_priv);
451 }
452
453 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
454 char *buff)
455 {
456 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
457 int bytes_written;
458
459 batadv_sysfs_deprecated(attr);
460
461 /* GW mode is not available if the routing algorithm in use does not
462 * implement the GW API
463 */
464 if (!bat_priv->algo_ops->gw.get_best_gw_node ||
465 !bat_priv->algo_ops->gw.is_eligible)
466 return -ENOENT;
467
468 switch (atomic_read(&bat_priv->gw.mode)) {
469 case BATADV_GW_MODE_CLIENT:
470 bytes_written = sprintf(buff, "%s\n",
471 BATADV_GW_MODE_CLIENT_NAME);
472 break;
473 case BATADV_GW_MODE_SERVER:
474 bytes_written = sprintf(buff, "%s\n",
475 BATADV_GW_MODE_SERVER_NAME);
476 break;
477 default:
478 bytes_written = sprintf(buff, "%s\n",
479 BATADV_GW_MODE_OFF_NAME);
480 break;
481 }
482
483 return bytes_written;
484 }
485
486 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
487 struct attribute *attr, char *buff,
488 size_t count)
489 {
490 struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
491 struct batadv_priv *bat_priv = netdev_priv(net_dev);
492 char *curr_gw_mode_str;
493 int gw_mode_tmp = -1;
494
495 batadv_sysfs_deprecated(attr);
496
497 /* toggling GW mode is allowed only if the routing algorithm in use
498 * provides the GW API
499 */
500 if (!bat_priv->algo_ops->gw.get_best_gw_node ||
501 !bat_priv->algo_ops->gw.is_eligible)
502 return -EINVAL;
503
504 if (buff[count - 1] == '\n')
505 buff[count - 1] = '\0';
506
507 if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
508 strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
509 gw_mode_tmp = BATADV_GW_MODE_OFF;
510
511 if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
512 strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
513 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
514
515 if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
516 strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
517 gw_mode_tmp = BATADV_GW_MODE_SERVER;
518
519 if (gw_mode_tmp < 0) {
520 batadv_info(net_dev,
521 "Invalid parameter for 'gw mode' setting received: %s\n",
522 buff);
523 return -EINVAL;
524 }
525
526 if (atomic_read(&bat_priv->gw.mode) == gw_mode_tmp)
527 return count;
528
529 switch (atomic_read(&bat_priv->gw.mode)) {
530 case BATADV_GW_MODE_CLIENT:
531 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
532 break;
533 case BATADV_GW_MODE_SERVER:
534 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
535 break;
536 default:
537 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
538 break;
539 }
540
541 batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
542 curr_gw_mode_str, buff);
543
544 /* Invoking batadv_gw_reselect() is not enough to really de-select the
545 * current GW. It will only instruct the gateway client code to perform
546 * a re-election the next time that this is needed.
547 *
548 * When gw client mode is being switched off the current GW must be
549 * de-selected explicitly otherwise no GW_ADD uevent is thrown on
550 * client mode re-activation. This is operation is performed in
551 * batadv_gw_check_client_stop().
552 */
553 batadv_gw_reselect(bat_priv);
554 /* always call batadv_gw_check_client_stop() before changing the gateway
555 * state
556 */
557 batadv_gw_check_client_stop(bat_priv);
558 atomic_set(&bat_priv->gw.mode, (unsigned int)gw_mode_tmp);
559 batadv_gw_tvlv_container_update(bat_priv);
560
561 batadv_netlink_notify_mesh(bat_priv);
562
563 return count;
564 }
565
566 static ssize_t batadv_show_gw_sel_class(struct kobject *kobj,
567 struct attribute *attr, char *buff)
568 {
569 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
570
571 batadv_sysfs_deprecated(attr);
572
573 /* GW selection class is not available if the routing algorithm in use
574 * does not implement the GW API
575 */
576 if (!bat_priv->algo_ops->gw.get_best_gw_node ||
577 !bat_priv->algo_ops->gw.is_eligible)
578 return -ENOENT;
579
580 if (bat_priv->algo_ops->gw.show_sel_class)
581 return bat_priv->algo_ops->gw.show_sel_class(bat_priv, buff);
582
583 return sprintf(buff, "%i\n", atomic_read(&bat_priv->gw.sel_class));
584 }
585
586 static ssize_t batadv_store_gw_sel_class(struct kobject *kobj,
587 struct attribute *attr, char *buff,
588 size_t count)
589 {
590 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
591 ssize_t length;
592
593 batadv_sysfs_deprecated(attr);
594
595 /* setting the GW selection class is allowed only if the routing
596 * algorithm in use implements the GW API
597 */
598 if (!bat_priv->algo_ops->gw.get_best_gw_node ||
599 !bat_priv->algo_ops->gw.is_eligible)
600 return -EINVAL;
601
602 if (buff[count - 1] == '\n')
603 buff[count - 1] = '\0';
604
605 if (bat_priv->algo_ops->gw.store_sel_class)
606 return bat_priv->algo_ops->gw.store_sel_class(bat_priv, buff,
607 count);
608
609 length = __batadv_store_uint_attr(buff, count, 1, BATADV_TQ_MAX_VALUE,
610 batadv_post_gw_reselect, attr,
611 &bat_priv->gw.sel_class,
612 bat_priv->soft_iface, NULL);
613
614 batadv_netlink_notify_mesh(bat_priv);
615
616 return length;
617 }
618
619 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
620 struct attribute *attr, char *buff)
621 {
622 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
623 u32 down, up;
624
625 batadv_sysfs_deprecated(attr);
626
627 down = atomic_read(&bat_priv->gw.bandwidth_down);
628 up = atomic_read(&bat_priv->gw.bandwidth_up);
629
630 return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
631 down % 10, up / 10, up % 10);
632 }
633
634 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
635 struct attribute *attr, char *buff,
636 size_t count)
637 {
638 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
639 struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
640 ssize_t length;
641
642 batadv_sysfs_deprecated(attr);
643
644 if (buff[count - 1] == '\n')
645 buff[count - 1] = '\0';
646
647 length = batadv_gw_bandwidth_set(net_dev, buff, count);
648
649 batadv_netlink_notify_mesh(bat_priv);
650
651 return length;
652 }
653
654 /**
655 * batadv_show_isolation_mark() - print the current isolation mark/mask
656 * @kobj: kobject representing the private mesh sysfs directory
657 * @attr: the batman-adv attribute the user is interacting with
658 * @buff: the buffer that will contain the data to send back to the user
659 *
660 * Return: the number of bytes written into 'buff' on success or a negative
661 * error code in case of failure
662 */
663 static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
664 struct attribute *attr, char *buff)
665 {
666 struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
667
668 batadv_sysfs_deprecated(attr);
669 return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
670 bat_priv->isolation_mark_mask);
671 }
672
673 /**
674 * batadv_store_isolation_mark() - parse and store the isolation mark/mask
675 * entered by the user
676 * @kobj: kobject representing the private mesh sysfs directory
677 * @attr: the batman-adv attribute the user is interacting with
678 * @buff: the buffer containing the user data
679 * @count: number of bytes in the buffer
680 *
681 * Return: 'count' on success or a negative error code in case of failure
682 */
683 static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
684 struct attribute *attr, char *buff,
685 size_t count)
686 {
687 struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
688 struct batadv_priv *bat_priv = netdev_priv(net_dev);
689 u32 mark, mask;
690 char *mask_ptr;
691
692 batadv_sysfs_deprecated(attr);
693
694 /* parse the mask if it has been specified, otherwise assume the mask is
695 * the biggest possible
696 */
697 mask = 0xFFFFFFFF;
698 mask_ptr = strchr(buff, '/');
699 if (mask_ptr) {
700 *mask_ptr = '\0';
701 mask_ptr++;
702
703 /* the mask must be entered in hex base as it is going to be a
704 * bitmask and not a prefix length
705 */
706 if (kstrtou32(mask_ptr, 16, &mask) < 0)
707 return -EINVAL;
708 }
709
710 /* the mark can be entered in any base */
711 if (kstrtou32(buff, 0, &mark) < 0)
712 return -EINVAL;
713
714 bat_priv->isolation_mark_mask = mask;
715 /* erase bits not covered by the mask */
716 bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
717
718 batadv_info(net_dev,
719 "New skb mark for extended isolation: %#.8x/%#.8x\n",
720 bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
721
722 batadv_netlink_notify_mesh(bat_priv);
723
724 return count;
725 }
726
727 BATADV_ATTR_SIF_BOOL(aggregated_ogms, 0644, NULL);
728 BATADV_ATTR_SIF_BOOL(bonding, 0644, NULL);
729 #ifdef CONFIG_BATMAN_ADV_BLA
730 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, 0644, batadv_bla_status_update);
731 #endif
732 #ifdef CONFIG_BATMAN_ADV_DAT
733 BATADV_ATTR_SIF_BOOL(distributed_arp_table, 0644, batadv_dat_status_update);
734 #endif
735 BATADV_ATTR_SIF_BOOL(fragmentation, 0644, batadv_update_min_mtu);
736 static BATADV_ATTR(routing_algo, 0444, batadv_show_bat_algo, NULL);
737 static BATADV_ATTR(gw_mode, 0644, batadv_show_gw_mode, batadv_store_gw_mode);
738 BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, 0644, 2 * BATADV_JITTER,
739 INT_MAX, NULL);
740 BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, 0644, 0, BATADV_TQ_MAX_VALUE,
741 NULL);
742 static BATADV_ATTR(gw_sel_class, 0644, batadv_show_gw_sel_class,
743 batadv_store_gw_sel_class);
744 static BATADV_ATTR(gw_bandwidth, 0644, batadv_show_gw_bwidth,
745 batadv_store_gw_bwidth);
746 #ifdef CONFIG_BATMAN_ADV_MCAST
747 BATADV_ATTR_SIF_BOOL(multicast_mode, 0644, NULL);
748 #endif
749 #ifdef CONFIG_BATMAN_ADV_DEBUG
750 BATADV_ATTR_SIF_UINT(log_level, log_level, 0644, 0, BATADV_DBG_ALL, NULL);
751 #endif
752 #ifdef CONFIG_BATMAN_ADV_NC
753 BATADV_ATTR_SIF_BOOL(network_coding, 0644, batadv_nc_status_update);
754 #endif
755 static BATADV_ATTR(isolation_mark, 0644, batadv_show_isolation_mark,
756 batadv_store_isolation_mark);
757
758 static struct batadv_attribute *batadv_mesh_attrs[] = {
759 &batadv_attr_aggregated_ogms,
760 &batadv_attr_bonding,
761 #ifdef CONFIG_BATMAN_ADV_BLA
762 &batadv_attr_bridge_loop_avoidance,
763 #endif
764 #ifdef CONFIG_BATMAN_ADV_DAT
765 &batadv_attr_distributed_arp_table,
766 #endif
767 #ifdef CONFIG_BATMAN_ADV_MCAST
768 &batadv_attr_multicast_mode,
769 #endif
770 &batadv_attr_fragmentation,
771 &batadv_attr_routing_algo,
772 &batadv_attr_gw_mode,
773 &batadv_attr_orig_interval,
774 &batadv_attr_hop_penalty,
775 &batadv_attr_gw_sel_class,
776 &batadv_attr_gw_bandwidth,
777 #ifdef CONFIG_BATMAN_ADV_DEBUG
778 &batadv_attr_log_level,
779 #endif
780 #ifdef CONFIG_BATMAN_ADV_NC
781 &batadv_attr_network_coding,
782 #endif
783 &batadv_attr_isolation_mark,
784 NULL,
785 };
786
787 BATADV_ATTR_VLAN_BOOL(ap_isolation, 0644, NULL);
788
789 /* array of vlan specific sysfs attributes */
790 static struct batadv_attribute *batadv_vlan_attrs[] = {
791 &batadv_attr_vlan_ap_isolation,
792 NULL,
793 };
794
795 /**
796 * batadv_sysfs_add_meshif() - Add soft interface specific sysfs entries
797 * @dev: netdev struct of the soft interface
798 *
799 * Return: 0 on success or negative error number in case of failure
800 */
801 int batadv_sysfs_add_meshif(struct net_device *dev)
802 {
803 struct kobject *batif_kobject = &dev->dev.kobj;
804 struct batadv_priv *bat_priv = netdev_priv(dev);
805 struct batadv_attribute **bat_attr;
806 int err;
807
808 bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
809 batif_kobject);
810 if (!bat_priv->mesh_obj) {
811 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
812 BATADV_SYSFS_IF_MESH_SUBDIR);
813 goto out;
814 }
815
816 for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
817 err = sysfs_create_file(bat_priv->mesh_obj,
818 &((*bat_attr)->attr));
819 if (err) {
820 batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
821 dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
822 ((*bat_attr)->attr).name);
823 goto rem_attr;
824 }
825 }
826
827 return 0;
828
829 rem_attr:
830 for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
831 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
832
833 kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
834 kobject_del(bat_priv->mesh_obj);
835 kobject_put(bat_priv->mesh_obj);
836 bat_priv->mesh_obj = NULL;
837 out:
838 return -ENOMEM;
839 }
840
841 /**
842 * batadv_sysfs_del_meshif() - Remove soft interface specific sysfs entries
843 * @dev: netdev struct of the soft interface
844 */
845 void batadv_sysfs_del_meshif(struct net_device *dev)
846 {
847 struct batadv_priv *bat_priv = netdev_priv(dev);
848 struct batadv_attribute **bat_attr;
849
850 for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
851 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
852
853 kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
854 kobject_del(bat_priv->mesh_obj);
855 kobject_put(bat_priv->mesh_obj);
856 bat_priv->mesh_obj = NULL;
857 }
858
859 /**
860 * batadv_sysfs_add_vlan() - add all the needed sysfs objects for the new vlan
861 * @dev: netdev of the mesh interface
862 * @vlan: private data of the newly added VLAN interface
863 *
864 * Return: 0 on success and -ENOMEM if any of the structure allocations fails.
865 */
866 int batadv_sysfs_add_vlan(struct net_device *dev,
867 struct batadv_softif_vlan *vlan)
868 {
869 char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
870 struct batadv_priv *bat_priv = netdev_priv(dev);
871 struct batadv_attribute **bat_attr;
872 int err;
873
874 if (vlan->vid & BATADV_VLAN_HAS_TAG) {
875 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
876 vlan->vid & VLAN_VID_MASK);
877
878 vlan->kobj = kobject_create_and_add(vlan_subdir,
879 bat_priv->mesh_obj);
880 if (!vlan->kobj) {
881 batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
882 dev->name, vlan_subdir);
883 goto out;
884 }
885 } else {
886 /* the untagged LAN uses the root folder to store its "VLAN
887 * specific attributes"
888 */
889 vlan->kobj = bat_priv->mesh_obj;
890 kobject_get(bat_priv->mesh_obj);
891 }
892
893 for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
894 err = sysfs_create_file(vlan->kobj,
895 &((*bat_attr)->attr));
896 if (err) {
897 batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
898 dev->name, vlan_subdir,
899 ((*bat_attr)->attr).name);
900 goto rem_attr;
901 }
902 }
903
904 return 0;
905
906 rem_attr:
907 for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
908 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
909
910 if (vlan->kobj != bat_priv->mesh_obj) {
911 kobject_uevent(vlan->kobj, KOBJ_REMOVE);
912 kobject_del(vlan->kobj);
913 }
914 kobject_put(vlan->kobj);
915 vlan->kobj = NULL;
916 out:
917 return -ENOMEM;
918 }
919
920 /**
921 * batadv_sysfs_del_vlan() - remove all the sysfs objects for a given VLAN
922 * @bat_priv: the bat priv with all the soft interface information
923 * @vlan: the private data of the VLAN to destroy
924 */
925 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
926 struct batadv_softif_vlan *vlan)
927 {
928 struct batadv_attribute **bat_attr;
929
930 for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
931 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
932
933 if (vlan->kobj != bat_priv->mesh_obj) {
934 kobject_uevent(vlan->kobj, KOBJ_REMOVE);
935 kobject_del(vlan->kobj);
936 }
937 kobject_put(vlan->kobj);
938 vlan->kobj = NULL;
939 }
940
941 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
942 struct attribute *attr, char *buff)
943 {
944 struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
945 struct batadv_hard_iface *hard_iface;
946 ssize_t length;
947 const char *ifname;
948
949 batadv_sysfs_deprecated(attr);
950
951 hard_iface = batadv_hardif_get_by_netdev(net_dev);
952 if (!hard_iface)
953 return 0;
954
955 if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
956 ifname = "none";
957 else
958 ifname = hard_iface->soft_iface->name;
959
960 length = sprintf(buff, "%s\n", ifname);
961
962 batadv_hardif_put(hard_iface);
963
964 return length;
965 }
966
967 /**
968 * batadv_store_mesh_iface_finish() - store new hardif mesh_iface state
969 * @net_dev: netdevice to add/remove to/from batman-adv soft-interface
970 * @ifname: name of soft-interface to modify
971 *
972 * Changes the parts of the hard+soft interface which can not be modified under
973 * sysfs lock (to prevent deadlock situations).
974 *
975 * Return: 0 on success, 0 < on failure
976 */
977 static int batadv_store_mesh_iface_finish(struct net_device *net_dev,
978 char ifname[IFNAMSIZ])
979 {
980 struct net *net = dev_net(net_dev);
981 struct batadv_hard_iface *hard_iface;
982 int status_tmp;
983 int ret = 0;
984
985 ASSERT_RTNL();
986
987 hard_iface = batadv_hardif_get_by_netdev(net_dev);
988 if (!hard_iface)
989 return 0;
990
991 if (strncmp(ifname, "none", 4) == 0)
992 status_tmp = BATADV_IF_NOT_IN_USE;
993 else
994 status_tmp = BATADV_IF_I_WANT_YOU;
995
996 if (hard_iface->if_status == status_tmp)
997 goto out;
998
999 if (hard_iface->soft_iface &&
1000 strncmp(hard_iface->soft_iface->name, ifname, IFNAMSIZ) == 0)
1001 goto out;
1002
1003 if (status_tmp == BATADV_IF_NOT_IN_USE) {
1004 batadv_hardif_disable_interface(hard_iface,
1005 BATADV_IF_CLEANUP_AUTO);
1006 goto out;
1007 }
1008
1009 /* if the interface already is in use */
1010 if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
1011 batadv_hardif_disable_interface(hard_iface,
1012 BATADV_IF_CLEANUP_AUTO);
1013
1014 ret = batadv_hardif_enable_interface(hard_iface, net, ifname);
1015 out:
1016 batadv_hardif_put(hard_iface);
1017 return ret;
1018 }
1019
1020 /**
1021 * batadv_store_mesh_iface_work() - store new hardif mesh_iface state
1022 * @work: work queue item
1023 *
1024 * Changes the parts of the hard+soft interface which can not be modified under
1025 * sysfs lock (to prevent deadlock situations).
1026 */
1027 static void batadv_store_mesh_iface_work(struct work_struct *work)
1028 {
1029 struct batadv_store_mesh_work *store_work;
1030 int ret;
1031
1032 store_work = container_of(work, struct batadv_store_mesh_work, work);
1033
1034 rtnl_lock();
1035 ret = batadv_store_mesh_iface_finish(store_work->net_dev,
1036 store_work->soft_iface_name);
1037 rtnl_unlock();
1038
1039 if (ret < 0)
1040 pr_err("Failed to store new mesh_iface state %s for %s: %d\n",
1041 store_work->soft_iface_name, store_work->net_dev->name,
1042 ret);
1043
1044 dev_put(store_work->net_dev);
1045 kfree(store_work);
1046 }
1047
1048 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
1049 struct attribute *attr, char *buff,
1050 size_t count)
1051 {
1052 struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1053 struct batadv_store_mesh_work *store_work;
1054
1055 batadv_sysfs_deprecated(attr);
1056
1057 if (buff[count - 1] == '\n')
1058 buff[count - 1] = '\0';
1059
1060 if (strlen(buff) >= IFNAMSIZ) {
1061 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
1062 buff);
1063 return -EINVAL;
1064 }
1065
1066 store_work = kmalloc(sizeof(*store_work), GFP_KERNEL);
1067 if (!store_work)
1068 return -ENOMEM;
1069
1070 dev_hold(net_dev);
1071 INIT_WORK(&store_work->work, batadv_store_mesh_iface_work);
1072 store_work->net_dev = net_dev;
1073 strscpy(store_work->soft_iface_name, buff,
1074 sizeof(store_work->soft_iface_name));
1075
1076 queue_work(batadv_event_workqueue, &store_work->work);
1077
1078 return count;
1079 }
1080
1081 static ssize_t batadv_show_iface_status(struct kobject *kobj,
1082 struct attribute *attr, char *buff)
1083 {
1084 struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1085 struct batadv_hard_iface *hard_iface;
1086 ssize_t length;
1087
1088 batadv_sysfs_deprecated(attr);
1089
1090 hard_iface = batadv_hardif_get_by_netdev(net_dev);
1091 if (!hard_iface)
1092 return 0;
1093
1094 switch (hard_iface->if_status) {
1095 case BATADV_IF_TO_BE_REMOVED:
1096 length = sprintf(buff, "disabling\n");
1097 break;
1098 case BATADV_IF_INACTIVE:
1099 length = sprintf(buff, "inactive\n");
1100 break;
1101 case BATADV_IF_ACTIVE:
1102 length = sprintf(buff, "active\n");
1103 break;
1104 case BATADV_IF_TO_BE_ACTIVATED:
1105 length = sprintf(buff, "enabling\n");
1106 break;
1107 case BATADV_IF_NOT_IN_USE:
1108 default:
1109 length = sprintf(buff, "not in use\n");
1110 break;
1111 }
1112
1113 batadv_hardif_put(hard_iface);
1114
1115 return length;
1116 }
1117
1118 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1119
1120 /**
1121 * batadv_store_throughput_override() - parse and store throughput override
1122 * entered by the user
1123 * @kobj: kobject representing the private mesh sysfs directory
1124 * @attr: the batman-adv attribute the user is interacting with
1125 * @buff: the buffer containing the user data
1126 * @count: number of bytes in the buffer
1127 *
1128 * Return: 'count' on success or a negative error code in case of failure
1129 */
1130 static ssize_t batadv_store_throughput_override(struct kobject *kobj,
1131 struct attribute *attr,
1132 char *buff, size_t count)
1133 {
1134 struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1135 struct batadv_hard_iface *hard_iface;
1136 struct batadv_priv *bat_priv;
1137 u32 tp_override;
1138 u32 old_tp_override;
1139 bool ret;
1140
1141 batadv_sysfs_deprecated(attr);
1142
1143 hard_iface = batadv_hardif_get_by_netdev(net_dev);
1144 if (!hard_iface)
1145 return -EINVAL;
1146
1147 if (buff[count - 1] == '\n')
1148 buff[count - 1] = '\0';
1149
1150 ret = batadv_parse_throughput(net_dev, buff, "throughput_override",
1151 &tp_override);
1152 if (!ret)
1153 return count;
1154
1155 old_tp_override = atomic_read(&hard_iface->bat_v.throughput_override);
1156 if (old_tp_override == tp_override)
1157 goto out;
1158
1159 batadv_info(hard_iface->soft_iface,
1160 "%s: %s: Changing from: %u.%u MBit to: %u.%u MBit\n",
1161 "throughput_override", net_dev->name,
1162 old_tp_override / 10, old_tp_override % 10,
1163 tp_override / 10, tp_override % 10);
1164
1165 atomic_set(&hard_iface->bat_v.throughput_override, tp_override);
1166
1167 if (hard_iface->soft_iface) {
1168 bat_priv = netdev_priv(hard_iface->soft_iface);
1169 batadv_netlink_notify_hardif(bat_priv, hard_iface);
1170 }
1171
1172 out:
1173 batadv_hardif_put(hard_iface);
1174 return count;
1175 }
1176
1177 static ssize_t batadv_show_throughput_override(struct kobject *kobj,
1178 struct attribute *attr,
1179 char *buff)
1180 {
1181 struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1182 struct batadv_hard_iface *hard_iface;
1183 u32 tp_override;
1184
1185 batadv_sysfs_deprecated(attr);
1186
1187 hard_iface = batadv_hardif_get_by_netdev(net_dev);
1188 if (!hard_iface)
1189 return -EINVAL;
1190
1191 tp_override = atomic_read(&hard_iface->bat_v.throughput_override);
1192
1193 return sprintf(buff, "%u.%u MBit\n", tp_override / 10,
1194 tp_override % 10);
1195 }
1196
1197 #endif
1198
1199 static BATADV_ATTR(mesh_iface, 0644, batadv_show_mesh_iface,
1200 batadv_store_mesh_iface);
1201 static BATADV_ATTR(iface_status, 0444, batadv_show_iface_status, NULL);
1202 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1203 BATADV_ATTR_HIF_UINT(elp_interval, bat_v.elp_interval, 0644,
1204 2 * BATADV_JITTER, INT_MAX, NULL);
1205 static BATADV_ATTR(throughput_override, 0644, batadv_show_throughput_override,
1206 batadv_store_throughput_override);
1207 #endif
1208
1209 static struct batadv_attribute *batadv_batman_attrs[] = {
1210 &batadv_attr_mesh_iface,
1211 &batadv_attr_iface_status,
1212 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1213 &batadv_attr_elp_interval,
1214 &batadv_attr_throughput_override,
1215 #endif
1216 NULL,
1217 };
1218
1219 /**
1220 * batadv_sysfs_add_hardif() - Add hard interface specific sysfs entries
1221 * @hardif_obj: address where to store the pointer to new sysfs folder
1222 * @dev: netdev struct of the hard interface
1223 *
1224 * Return: 0 on success or negative error number in case of failure
1225 */
1226 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
1227 {
1228 struct kobject *hardif_kobject = &dev->dev.kobj;
1229 struct batadv_attribute **bat_attr;
1230 int err;
1231
1232 *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
1233 hardif_kobject);
1234
1235 if (!*hardif_obj) {
1236 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
1237 BATADV_SYSFS_IF_BAT_SUBDIR);
1238 goto out;
1239 }
1240
1241 for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
1242 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
1243 if (err) {
1244 batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
1245 dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
1246 ((*bat_attr)->attr).name);
1247 goto rem_attr;
1248 }
1249 }
1250
1251 return 0;
1252
1253 rem_attr:
1254 for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
1255 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
1256 out:
1257 return -ENOMEM;
1258 }
1259
1260 /**
1261 * batadv_sysfs_del_hardif() - Remove hard interface specific sysfs entries
1262 * @hardif_obj: address to the pointer to which stores batman-adv sysfs folder
1263 * of the hard interface
1264 */
1265 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
1266 {
1267 kobject_uevent(*hardif_obj, KOBJ_REMOVE);
1268 kobject_del(*hardif_obj);
1269 kobject_put(*hardif_obj);
1270 *hardif_obj = NULL;
1271 }
connection oriented routing