1 /*
2 * Copyright (C) 2010-2012 B.A.T.M.A.N. contributors:
3 *
4 * Marek Lindner
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA
19 *
20 */
21
22 #include "main.h"
23 #include "bat_sysfs.h"
24 #include "translation-table.h"
25 #include "originator.h"
26 #include "hard-interface.h"
27 #include "gateway_common.h"
28 #include "gateway_client.h"
29 #include "vis.h"
30
kobj_to_netdev(struct kobject * obj)31 static struct net_device *kobj_to_netdev(struct kobject *obj)
32 {
33 struct device *dev = container_of(obj->parent, struct device, kobj);
34 return to_net_dev(dev);
35 }
36
kobj_to_batpriv(struct kobject * obj)37 static struct bat_priv *kobj_to_batpriv(struct kobject *obj)
38 {
39 struct net_device *net_dev = kobj_to_netdev(obj);
40 return netdev_priv(net_dev);
41 }
42
43 #define UEV_TYPE_VAR "BATTYPE="
44 #define UEV_ACTION_VAR "BATACTION="
45 #define UEV_DATA_VAR "BATDATA="
46
47 static char *uev_action_str[] = {
48 "add",
49 "del",
50 "change"
51 };
52
53 static char *uev_type_str[] = {
54 "gw"
55 };
56
57 /* Use this, if you have customized show and store functions */
58 #define BAT_ATTR(_name, _mode, _show, _store) \
59 struct bat_attribute bat_attr_##_name = { \
60 .attr = {.name = __stringify(_name), \
61 .mode = _mode }, \
62 .show = _show, \
63 .store = _store, \
64 };
65
66 #define BAT_ATTR_STORE_BOOL(_name, _post_func) \
67 ssize_t store_##_name(struct kobject *kobj, struct attribute *attr, \
68 char *buff, size_t count) \
69 { \
70 struct net_device *net_dev = kobj_to_netdev(kobj); \
71 struct bat_priv *bat_priv = netdev_priv(net_dev); \
72 return __store_bool_attr(buff, count, _post_func, attr, \
73 &bat_priv->_name, net_dev); \
74 }
75
76 #define BAT_ATTR_SHOW_BOOL(_name) \
77 ssize_t show_##_name(struct kobject *kobj, struct attribute *attr, \
78 char *buff) \
79 { \
80 struct bat_priv *bat_priv = kobj_to_batpriv(kobj); \
81 return sprintf(buff, "%s\n", \
82 atomic_read(&bat_priv->_name) == 0 ? \
83 "disabled" : "enabled"); \
84 } \
85
86 /* Use this, if you are going to turn a [name] in bat_priv on or off */
87 #define BAT_ATTR_BOOL(_name, _mode, _post_func) \
88 static BAT_ATTR_STORE_BOOL(_name, _post_func) \
89 static BAT_ATTR_SHOW_BOOL(_name) \
90 static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
91
92
93 #define BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func) \
94 ssize_t store_##_name(struct kobject *kobj, struct attribute *attr, \
95 char *buff, size_t count) \
96 { \
97 struct net_device *net_dev = kobj_to_netdev(kobj); \
98 struct bat_priv *bat_priv = netdev_priv(net_dev); \
99 return __store_uint_attr(buff, count, _min, _max, _post_func, \
100 attr, &bat_priv->_name, net_dev); \
101 }
102
103 #define BAT_ATTR_SHOW_UINT(_name) \
104 ssize_t show_##_name(struct kobject *kobj, struct attribute *attr, \
105 char *buff) \
106 { \
107 struct bat_priv *bat_priv = kobj_to_batpriv(kobj); \
108 return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name)); \
109 } \
110
111 /* Use this, if you are going to set [name] in bat_priv to unsigned integer
112 * values only */
113 #define BAT_ATTR_UINT(_name, _mode, _min, _max, _post_func) \
114 static BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func) \
115 static BAT_ATTR_SHOW_UINT(_name) \
116 static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
117
118
store_bool_attr(char * buff,size_t count,struct net_device * net_dev,const char * attr_name,atomic_t * attr)119 static int store_bool_attr(char *buff, size_t count,
120 struct net_device *net_dev,
121 const char *attr_name, atomic_t *attr)
122 {
123 int enabled = -1;
124
125 if (buff[count - 1] == '\n')
126 buff[count - 1] = '\0';
127
128 if ((strncmp(buff, "1", 2) == 0) ||
129 (strncmp(buff, "enable", 7) == 0) ||
130 (strncmp(buff, "enabled", 8) == 0))
131 enabled = 1;
132
133 if ((strncmp(buff, "0", 2) == 0) ||
134 (strncmp(buff, "disable", 8) == 0) ||
135 (strncmp(buff, "disabled", 9) == 0))
136 enabled = 0;
137
138 if (enabled < 0) {
139 bat_info(net_dev,
140 "%s: Invalid parameter received: %s\n",
141 attr_name, buff);
142 return -EINVAL;
143 }
144
145 if (atomic_read(attr) == enabled)
146 return count;
147
148 bat_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
149 atomic_read(attr) == 1 ? "enabled" : "disabled",
150 enabled == 1 ? "enabled" : "disabled");
151
152 atomic_set(attr, (unsigned)enabled);
153 return count;
154 }
155
__store_bool_attr(char * buff,size_t count,void (* post_func)(struct net_device *),struct attribute * attr,atomic_t * attr_store,struct net_device * net_dev)156 static inline ssize_t __store_bool_attr(char *buff, size_t count,
157 void (*post_func)(struct net_device *),
158 struct attribute *attr,
159 atomic_t *attr_store, struct net_device *net_dev)
160 {
161 int ret;
162
163 ret = store_bool_attr(buff, count, net_dev, attr->name, attr_store);
164 if (post_func && ret)
165 post_func(net_dev);
166
167 return ret;
168 }
169
store_uint_attr(const char * buff,size_t count,struct net_device * net_dev,const char * attr_name,unsigned int min,unsigned int max,atomic_t * attr)170 static int store_uint_attr(const char *buff, size_t count,
171 struct net_device *net_dev, const char *attr_name,
172 unsigned int min, unsigned int max, atomic_t *attr)
173 {
174 unsigned long uint_val;
175 int ret;
176
177 ret = kstrtoul(buff, 10, &uint_val);
178 if (ret) {
179 bat_info(net_dev,
180 "%s: Invalid parameter received: %s\n",
181 attr_name, buff);
182 return -EINVAL;
183 }
184
185 if (uint_val < min) {
186 bat_info(net_dev, "%s: Value is too small: %lu min: %u\n",
187 attr_name, uint_val, min);
188 return -EINVAL;
189 }
190
191 if (uint_val > max) {
192 bat_info(net_dev, "%s: Value is too big: %lu max: %u\n",
193 attr_name, uint_val, max);
194 return -EINVAL;
195 }
196
197 if (atomic_read(attr) == uint_val)
198 return count;
199
200 bat_info(net_dev, "%s: Changing from: %i to: %lu\n",
201 attr_name, atomic_read(attr), uint_val);
202
203 atomic_set(attr, uint_val);
204 return count;
205 }
206
__store_uint_attr(const char * buff,size_t count,int min,int max,void (* post_func)(struct net_device *),const struct attribute * attr,atomic_t * attr_store,struct net_device * net_dev)207 static inline ssize_t __store_uint_attr(const char *buff, size_t count,
208 int min, int max,
209 void (*post_func)(struct net_device *),
210 const struct attribute *attr,
211 atomic_t *attr_store, struct net_device *net_dev)
212 {
213 int ret;
214
215 ret = store_uint_attr(buff, count, net_dev, attr->name,
216 min, max, attr_store);
217 if (post_func && ret)
218 post_func(net_dev);
219
220 return ret;
221 }
222
show_vis_mode(struct kobject * kobj,struct attribute * attr,char * buff)223 static ssize_t show_vis_mode(struct kobject *kobj, struct attribute *attr,
224 char *buff)
225 {
226 struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
227 int vis_mode = atomic_read(&bat_priv->vis_mode);
228
229 return sprintf(buff, "%s\n",
230 vis_mode == VIS_TYPE_CLIENT_UPDATE ?
231 "client" : "server");
232 }
233
store_vis_mode(struct kobject * kobj,struct attribute * attr,char * buff,size_t count)234 static ssize_t store_vis_mode(struct kobject *kobj, struct attribute *attr,
235 char *buff, size_t count)
236 {
237 struct net_device *net_dev = kobj_to_netdev(kobj);
238 struct bat_priv *bat_priv = netdev_priv(net_dev);
239 unsigned long val;
240 int ret, vis_mode_tmp = -1;
241
242 ret = kstrtoul(buff, 10, &val);
243
244 if (((count == 2) && (!ret) && (val == VIS_TYPE_CLIENT_UPDATE)) ||
245 (strncmp(buff, "client", 6) == 0) ||
246 (strncmp(buff, "off", 3) == 0))
247 vis_mode_tmp = VIS_TYPE_CLIENT_UPDATE;
248
249 if (((count == 2) && (!ret) && (val == VIS_TYPE_SERVER_SYNC)) ||
250 (strncmp(buff, "server", 6) == 0))
251 vis_mode_tmp = VIS_TYPE_SERVER_SYNC;
252
253 if (vis_mode_tmp < 0) {
254 if (buff[count - 1] == '\n')
255 buff[count - 1] = '\0';
256
257 bat_info(net_dev,
258 "Invalid parameter for 'vis mode' setting received: %s\n",
259 buff);
260 return -EINVAL;
261 }
262
263 if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
264 return count;
265
266 bat_info(net_dev, "Changing vis mode from: %s to: %s\n",
267 atomic_read(&bat_priv->vis_mode) == VIS_TYPE_CLIENT_UPDATE ?
268 "client" : "server", vis_mode_tmp == VIS_TYPE_CLIENT_UPDATE ?
269 "client" : "server");
270
271 atomic_set(&bat_priv->vis_mode, (unsigned)vis_mode_tmp);
272 return count;
273 }
274
show_bat_algo(struct kobject * kobj,struct attribute * attr,char * buff)275 static ssize_t show_bat_algo(struct kobject *kobj, struct attribute *attr,
276 char *buff)
277 {
278 struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
279 return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
280 }
281
post_gw_deselect(struct net_device * net_dev)282 static void post_gw_deselect(struct net_device *net_dev)
283 {
284 struct bat_priv *bat_priv = netdev_priv(net_dev);
285 gw_deselect(bat_priv);
286 }
287
show_gw_mode(struct kobject * kobj,struct attribute * attr,char * buff)288 static ssize_t show_gw_mode(struct kobject *kobj, struct attribute *attr,
289 char *buff)
290 {
291 struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
292 int bytes_written;
293
294 switch (atomic_read(&bat_priv->gw_mode)) {
295 case GW_MODE_CLIENT:
296 bytes_written = sprintf(buff, "%s\n", GW_MODE_CLIENT_NAME);
297 break;
298 case GW_MODE_SERVER:
299 bytes_written = sprintf(buff, "%s\n", GW_MODE_SERVER_NAME);
300 break;
301 default:
302 bytes_written = sprintf(buff, "%s\n", GW_MODE_OFF_NAME);
303 break;
304 }
305
306 return bytes_written;
307 }
308
store_gw_mode(struct kobject * kobj,struct attribute * attr,char * buff,size_t count)309 static ssize_t store_gw_mode(struct kobject *kobj, struct attribute *attr,
310 char *buff, size_t count)
311 {
312 struct net_device *net_dev = kobj_to_netdev(kobj);
313 struct bat_priv *bat_priv = netdev_priv(net_dev);
314 char *curr_gw_mode_str;
315 int gw_mode_tmp = -1;
316
317 if (buff[count - 1] == '\n')
318 buff[count - 1] = '\0';
319
320 if (strncmp(buff, GW_MODE_OFF_NAME, strlen(GW_MODE_OFF_NAME)) == 0)
321 gw_mode_tmp = GW_MODE_OFF;
322
323 if (strncmp(buff, GW_MODE_CLIENT_NAME,
324 strlen(GW_MODE_CLIENT_NAME)) == 0)
325 gw_mode_tmp = GW_MODE_CLIENT;
326
327 if (strncmp(buff, GW_MODE_SERVER_NAME,
328 strlen(GW_MODE_SERVER_NAME)) == 0)
329 gw_mode_tmp = GW_MODE_SERVER;
330
331 if (gw_mode_tmp < 0) {
332 bat_info(net_dev,
333 "Invalid parameter for 'gw mode' setting received: %s\n",
334 buff);
335 return -EINVAL;
336 }
337
338 if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
339 return count;
340
341 switch (atomic_read(&bat_priv->gw_mode)) {
342 case GW_MODE_CLIENT:
343 curr_gw_mode_str = GW_MODE_CLIENT_NAME;
344 break;
345 case GW_MODE_SERVER:
346 curr_gw_mode_str = GW_MODE_SERVER_NAME;
347 break;
348 default:
349 curr_gw_mode_str = GW_MODE_OFF_NAME;
350 break;
351 }
352
353 bat_info(net_dev, "Changing gw mode from: %s to: %s\n",
354 curr_gw_mode_str, buff);
355
356 gw_deselect(bat_priv);
357 atomic_set(&bat_priv->gw_mode, (unsigned)gw_mode_tmp);
358 return count;
359 }
360
show_gw_bwidth(struct kobject * kobj,struct attribute * attr,char * buff)361 static ssize_t show_gw_bwidth(struct kobject *kobj, struct attribute *attr,
362 char *buff)
363 {
364 struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
365 int down, up;
366 int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
367
368 gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
369 return sprintf(buff, "%i%s/%i%s\n",
370 (down > 2048 ? down / 1024 : down),
371 (down > 2048 ? "MBit" : "KBit"),
372 (up > 2048 ? up / 1024 : up),
373 (up > 2048 ? "MBit" : "KBit"));
374 }
375
store_gw_bwidth(struct kobject * kobj,struct attribute * attr,char * buff,size_t count)376 static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr,
377 char *buff, size_t count)
378 {
379 struct net_device *net_dev = kobj_to_netdev(kobj);
380
381 if (buff[count - 1] == '\n')
382 buff[count - 1] = '\0';
383
384 return gw_bandwidth_set(net_dev, buff, count);
385 }
386
387 BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
388 BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
389 BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
390 BAT_ATTR_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
391 static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
392 static BAT_ATTR(routing_algo, S_IRUGO, show_bat_algo, NULL);
393 static BAT_ATTR(gw_mode, S_IRUGO | S_IWUSR, show_gw_mode, store_gw_mode);
394 BAT_ATTR_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
395 BAT_ATTR_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
396 BAT_ATTR_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
397 post_gw_deselect);
398 static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
399 store_gw_bwidth);
400 #ifdef CONFIG_BATMAN_ADV_DEBUG
401 BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 7, NULL);
402 #endif
403
404 static struct bat_attribute *mesh_attrs[] = {
405 &bat_attr_aggregated_ogms,
406 &bat_attr_bonding,
407 &bat_attr_fragmentation,
408 &bat_attr_ap_isolation,
409 &bat_attr_vis_mode,
410 &bat_attr_routing_algo,
411 &bat_attr_gw_mode,
412 &bat_attr_orig_interval,
413 &bat_attr_hop_penalty,
414 &bat_attr_gw_sel_class,
415 &bat_attr_gw_bandwidth,
416 #ifdef CONFIG_BATMAN_ADV_DEBUG
417 &bat_attr_log_level,
418 #endif
419 NULL,
420 };
421
sysfs_add_meshif(struct net_device * dev)422 int sysfs_add_meshif(struct net_device *dev)
423 {
424 struct kobject *batif_kobject = &dev->dev.kobj;
425 struct bat_priv *bat_priv = netdev_priv(dev);
426 struct bat_attribute **bat_attr;
427 int err;
428
429 bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
430 batif_kobject);
431 if (!bat_priv->mesh_obj) {
432 bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
433 SYSFS_IF_MESH_SUBDIR);
434 goto out;
435 }
436
437 for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr) {
438 err = sysfs_create_file(bat_priv->mesh_obj,
439 &((*bat_attr)->attr));
440 if (err) {
441 bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
442 dev->name, SYSFS_IF_MESH_SUBDIR,
443 ((*bat_attr)->attr).name);
444 goto rem_attr;
445 }
446 }
447
448 return 0;
449
450 rem_attr:
451 for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
452 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
453
454 kobject_put(bat_priv->mesh_obj);
455 bat_priv->mesh_obj = NULL;
456 out:
457 return -ENOMEM;
458 }
459
sysfs_del_meshif(struct net_device * dev)460 void sysfs_del_meshif(struct net_device *dev)
461 {
462 struct bat_priv *bat_priv = netdev_priv(dev);
463 struct bat_attribute **bat_attr;
464
465 for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
466 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
467
468 kobject_put(bat_priv->mesh_obj);
469 bat_priv->mesh_obj = NULL;
470 }
471
show_mesh_iface(struct kobject * kobj,struct attribute * attr,char * buff)472 static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
473 char *buff)
474 {
475 struct net_device *net_dev = kobj_to_netdev(kobj);
476 struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
477 ssize_t length;
478
479 if (!hard_iface)
480 return 0;
481
482 length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
483 "none" : hard_iface->soft_iface->name);
484
485 hardif_free_ref(hard_iface);
486
487 return length;
488 }
489
store_mesh_iface(struct kobject * kobj,struct attribute * attr,char * buff,size_t count)490 static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
491 char *buff, size_t count)
492 {
493 struct net_device *net_dev = kobj_to_netdev(kobj);
494 struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
495 int status_tmp = -1;
496 int ret = count;
497
498 if (!hard_iface)
499 return count;
500
501 if (buff[count - 1] == '\n')
502 buff[count - 1] = '\0';
503
504 if (strlen(buff) >= IFNAMSIZ) {
505 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
506 buff);
507 hardif_free_ref(hard_iface);
508 return -EINVAL;
509 }
510
511 if (strncmp(buff, "none", 4) == 0)
512 status_tmp = IF_NOT_IN_USE;
513 else
514 status_tmp = IF_I_WANT_YOU;
515
516 if (hard_iface->if_status == status_tmp)
517 goto out;
518
519 if ((hard_iface->soft_iface) &&
520 (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
521 goto out;
522
523 if (!rtnl_trylock()) {
524 ret = -ERESTARTSYS;
525 goto out;
526 }
527
528 if (status_tmp == IF_NOT_IN_USE) {
529 hardif_disable_interface(hard_iface);
530 goto unlock;
531 }
532
533 /* if the interface already is in use */
534 if (hard_iface->if_status != IF_NOT_IN_USE)
535 hardif_disable_interface(hard_iface);
536
537 ret = hardif_enable_interface(hard_iface, buff);
538
539 unlock:
540 rtnl_unlock();
541 out:
542 hardif_free_ref(hard_iface);
543 return ret;
544 }
545
show_iface_status(struct kobject * kobj,struct attribute * attr,char * buff)546 static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
547 char *buff)
548 {
549 struct net_device *net_dev = kobj_to_netdev(kobj);
550 struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
551 ssize_t length;
552
553 if (!hard_iface)
554 return 0;
555
556 switch (hard_iface->if_status) {
557 case IF_TO_BE_REMOVED:
558 length = sprintf(buff, "disabling\n");
559 break;
560 case IF_INACTIVE:
561 length = sprintf(buff, "inactive\n");
562 break;
563 case IF_ACTIVE:
564 length = sprintf(buff, "active\n");
565 break;
566 case IF_TO_BE_ACTIVATED:
567 length = sprintf(buff, "enabling\n");
568 break;
569 case IF_NOT_IN_USE:
570 default:
571 length = sprintf(buff, "not in use\n");
572 break;
573 }
574
575 hardif_free_ref(hard_iface);
576
577 return length;
578 }
579
580 static BAT_ATTR(mesh_iface, S_IRUGO | S_IWUSR,
581 show_mesh_iface, store_mesh_iface);
582 static BAT_ATTR(iface_status, S_IRUGO, show_iface_status, NULL);
583
584 static struct bat_attribute *batman_attrs[] = {
585 &bat_attr_mesh_iface,
586 &bat_attr_iface_status,
587 NULL,
588 };
589
sysfs_add_hardif(struct kobject ** hardif_obj,struct net_device * dev)590 int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
591 {
592 struct kobject *hardif_kobject = &dev->dev.kobj;
593 struct bat_attribute **bat_attr;
594 int err;
595
596 *hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
597 hardif_kobject);
598
599 if (!*hardif_obj) {
600 bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
601 SYSFS_IF_BAT_SUBDIR);
602 goto out;
603 }
604
605 for (bat_attr = batman_attrs; *bat_attr; ++bat_attr) {
606 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
607 if (err) {
608 bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
609 dev->name, SYSFS_IF_BAT_SUBDIR,
610 ((*bat_attr)->attr).name);
611 goto rem_attr;
612 }
613 }
614
615 return 0;
616
617 rem_attr:
618 for (bat_attr = batman_attrs; *bat_attr; ++bat_attr)
619 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
620 out:
621 return -ENOMEM;
622 }
623
sysfs_del_hardif(struct kobject ** hardif_obj)624 void sysfs_del_hardif(struct kobject **hardif_obj)
625 {
626 kobject_put(*hardif_obj);
627 *hardif_obj = NULL;
628 }
629
throw_uevent(struct bat_priv * bat_priv,enum uev_type type,enum uev_action action,const char * data)630 int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
631 enum uev_action action, const char *data)
632 {
633 int ret = -1;
634 struct hard_iface *primary_if = NULL;
635 struct kobject *bat_kobj;
636 char *uevent_env[4] = { NULL, NULL, NULL, NULL };
637
638 primary_if = primary_if_get_selected(bat_priv);
639 if (!primary_if)
640 goto out;
641
642 bat_kobj = &primary_if->soft_iface->dev.kobj;
643
644 uevent_env[0] = kmalloc(strlen(UEV_TYPE_VAR) +
645 strlen(uev_type_str[type]) + 1,
646 GFP_ATOMIC);
647 if (!uevent_env[0])
648 goto out;
649
650 sprintf(uevent_env[0], "%s%s", UEV_TYPE_VAR, uev_type_str[type]);
651
652 uevent_env[1] = kmalloc(strlen(UEV_ACTION_VAR) +
653 strlen(uev_action_str[action]) + 1,
654 GFP_ATOMIC);
655 if (!uevent_env[1])
656 goto out;
657
658 sprintf(uevent_env[1], "%s%s", UEV_ACTION_VAR, uev_action_str[action]);
659
660 /* If the event is DEL, ignore the data field */
661 if (action != UEV_DEL) {
662 uevent_env[2] = kmalloc(strlen(UEV_DATA_VAR) +
663 strlen(data) + 1, GFP_ATOMIC);
664 if (!uevent_env[2])
665 goto out;
666
667 sprintf(uevent_env[2], "%s%s", UEV_DATA_VAR, data);
668 }
669
670 ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
671 out:
672 kfree(uevent_env[0]);
673 kfree(uevent_env[1]);
674 kfree(uevent_env[2]);
675
676 if (primary_if)
677 hardif_free_ref(primary_if);
678
679 if (ret)
680 bat_dbg(DBG_BATMAN, bat_priv,
681 "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
682 uev_type_str[type], uev_action_str[action],
683 (action == UEV_DEL ? "NULL" : data), ret);
684 return ret;
685 }
686