[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / batman-adv / bat_sysfs.c

/*
 * Copyright (C) 2010-2011 B.A.T.M.A.N. contributors:
 *
 * Marek Lindner
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 *
 */

#include "main.h"
#include "bat_sysfs.h"
#include "translation-table.h"
#include "originator.h"
#include "hard-interface.h"
#include "gateway_common.h"
#include "gateway_client.h"
#include "vis.h"

static struct net_device *kobj_to_netdev(struct kobject *obj)
{
	struct device *dev = container_of(obj->parent, struct device, kobj);
	return to_net_dev(dev);
}

static struct bat_priv *kobj_to_batpriv(struct kobject *obj)
{
	struct net_device *net_dev = kobj_to_netdev(obj);
	return netdev_priv(net_dev);
}

#define UEV_TYPE_VAR	"BATTYPE="
#define UEV_ACTION_VAR	"BATACTION="
#define UEV_DATA_VAR	"BATDATA="

static char *uev_action_str[] = {
	"add",
	"del",
	"change"
};

static char *uev_type_str[] = {
	"gw"
};

/* Use this, if you have customized show and store functions */
#define BAT_ATTR(_name, _mode, _show, _store)	\
struct bat_attribute bat_attr_##_name = {	\
	.attr = {.name = __stringify(_name),	\
		 .mode = _mode },		\
	.show   = _show,			\
	.store  = _store,			\
};

#define BAT_ATTR_STORE_BOOL(_name, _post_func)				\
ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,	\
		      char *buff, size_t count)				\
{									\
	struct net_device *net_dev = kobj_to_netdev(kobj);		\
	struct bat_priv *bat_priv = netdev_priv(net_dev);		\
	return __store_bool_attr(buff, count, _post_func, attr,		\
				 &bat_priv->_name, net_dev);		\
}

#define BAT_ATTR_SHOW_BOOL(_name)					\
ssize_t show_##_name(struct kobject *kobj, struct attribute *attr,	\
			    char *buff)					\
{									\
	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);		\
	return sprintf(buff, "%s\n",					\
		       atomic_read(&bat_priv->_name) == 0 ?		\
		       "disabled" : "enabled");				\
}									\

/* Use this, if you are going to turn a [name] in bat_priv on or off */
#define BAT_ATTR_BOOL(_name, _mode, _post_func)				\
	static BAT_ATTR_STORE_BOOL(_name, _post_func)			\
	static BAT_ATTR_SHOW_BOOL(_name)				\
	static BAT_ATTR(_name, _mode, show_##_name, store_##_name)


#define BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func)		\
ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,	\
			     char *buff, size_t count)			\
{									\
	struct net_device *net_dev = kobj_to_netdev(kobj);		\
	struct bat_priv *bat_priv = netdev_priv(net_dev);		\
	return __store_uint_attr(buff, count, _min, _max, _post_func,	\
				 attr, &bat_priv->_name, net_dev);	\
}

#define BAT_ATTR_SHOW_UINT(_name)					\
ssize_t show_##_name(struct kobject *kobj, struct attribute *attr,	\
			    char *buff)					\
{									\
	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);		\
	return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));	\
}									\

/* Use this, if you are going to set [name] in bat_priv to unsigned integer
 * values only */
#define BAT_ATTR_UINT(_name, _mode, _min, _max, _post_func)		\
	static BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func)	\
	static BAT_ATTR_SHOW_UINT(_name)				\
	static BAT_ATTR(_name, _mode, show_##_name, store_##_name)


static int store_bool_attr(char *buff, size_t count,
			   struct net_device *net_dev,
			   const char *attr_name, atomic_t *attr)
{
	int enabled = -1;

	if (buff[count - 1] == '\n')
		buff[count - 1] = '\0';

	if ((strncmp(buff, "1", 2) == 0) ||
	    (strncmp(buff, "enable", 7) == 0) ||
	    (strncmp(buff, "enabled", 8) == 0))
		enabled = 1;

	if ((strncmp(buff, "0", 2) == 0) ||
	    (strncmp(buff, "disable", 8) == 0) ||
	    (strncmp(buff, "disabled", 9) == 0))
		enabled = 0;

	if (enabled < 0) {
		bat_info(net_dev,
			 "%s: Invalid parameter received: %s\n",
			 attr_name, buff);
		return -EINVAL;
	}

	if (atomic_read(attr) == enabled)
		return count;

	bat_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
		 atomic_read(attr) == 1 ? "enabled" : "disabled",
		 enabled == 1 ? "enabled" : "disabled");

	atomic_set(attr, (unsigned)enabled);
	return count;
}

static inline ssize_t __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)
{
	int ret;

	ret = store_bool_attr(buff, count, net_dev, attr->name, attr_store);
	if (post_func && ret)
		post_func(net_dev);

	return ret;
}

static int 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)
{
	unsigned long uint_val;
	int ret;

	ret = strict_strtoul(buff, 10, &uint_val);
	if (ret) {
		bat_info(net_dev,
			 "%s: Invalid parameter received: %s\n",
			 attr_name, buff);
		return -EINVAL;
	}

	if (uint_val < min) {
		bat_info(net_dev, "%s: Value is too small: %lu min: %u\n",
			 attr_name, uint_val, min);
		return -EINVAL;
	}

	if (uint_val > max) {
		bat_info(net_dev, "%s: Value is too big: %lu max: %u\n",
			 attr_name, uint_val, max);
		return -EINVAL;
	}

	if (atomic_read(attr) == uint_val)
		return count;

	bat_info(net_dev, "%s: Changing from: %i to: %lu\n",
		 attr_name, atomic_read(attr), uint_val);

	atomic_set(attr, uint_val);
	return count;
}

static inline ssize_t __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)
{
	int ret;

	ret = store_uint_attr(buff, count, net_dev, attr->name,
			      min, max, attr_store);
	if (post_func && ret)
		post_func(net_dev);

	return ret;
}

static ssize_t show_vis_mode(struct kobject *kobj, struct attribute *attr,
			     char *buff)
{
	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
	int vis_mode = atomic_read(&bat_priv->vis_mode);

	return sprintf(buff, "%s\n",
		       vis_mode == VIS_TYPE_CLIENT_UPDATE ?
							"client" : "server");
}

static ssize_t store_vis_mode(struct kobject *kobj, struct attribute *attr,
			      char *buff, size_t count)
{
	struct net_device *net_dev = kobj_to_netdev(kobj);
	struct bat_priv *bat_priv = netdev_priv(net_dev);
	unsigned long val;
	int ret, vis_mode_tmp = -1;

	ret = strict_strtoul(buff, 10, &val);

	if (((count == 2) && (!ret) && (val == VIS_TYPE_CLIENT_UPDATE)) ||
	    (strncmp(buff, "client", 6) == 0) ||
	    (strncmp(buff, "off", 3) == 0))
		vis_mode_tmp = VIS_TYPE_CLIENT_UPDATE;

	if (((count == 2) && (!ret) && (val == VIS_TYPE_SERVER_SYNC)) ||
	    (strncmp(buff, "server", 6) == 0))
		vis_mode_tmp = VIS_TYPE_SERVER_SYNC;

	if (vis_mode_tmp < 0) {
		if (buff[count - 1] == '\n')
			buff[count - 1] = '\0';

		bat_info(net_dev,
			 "Invalid parameter for 'vis mode' setting received: "
			 "%s\n", buff);
		return -EINVAL;
	}

	if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
		return count;

	bat_info(net_dev, "Changing vis mode from: %s to: %s\n",
		 atomic_read(&bat_priv->vis_mode) == VIS_TYPE_CLIENT_UPDATE ?
		 "client" : "server", vis_mode_tmp == VIS_TYPE_CLIENT_UPDATE ?
		 "client" : "server");

	atomic_set(&bat_priv->vis_mode, (unsigned)vis_mode_tmp);
	return count;
}

static void post_gw_deselect(struct net_device *net_dev)
{
	struct bat_priv *bat_priv = netdev_priv(net_dev);
	gw_deselect(bat_priv);
}

static ssize_t show_gw_mode(struct kobject *kobj, struct attribute *attr,
			    char *buff)
{
	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
	int bytes_written;

	switch (atomic_read(&bat_priv->gw_mode)) {
	case GW_MODE_CLIENT:
		bytes_written = sprintf(buff, "%s\n", GW_MODE_CLIENT_NAME);
		break;
	case GW_MODE_SERVER:
		bytes_written = sprintf(buff, "%s\n", GW_MODE_SERVER_NAME);
		break;
	default:
		bytes_written = sprintf(buff, "%s\n", GW_MODE_OFF_NAME);
		break;
	}

	return bytes_written;
}

static ssize_t store_gw_mode(struct kobject *kobj, struct attribute *attr,
			     char *buff, size_t count)
{
	struct net_device *net_dev = kobj_to_netdev(kobj);
	struct bat_priv *bat_priv = netdev_priv(net_dev);
	char *curr_gw_mode_str;
	int gw_mode_tmp = -1;

	if (buff[count - 1] == '\n')
		buff[count - 1] = '\0';

	if (strncmp(buff, GW_MODE_OFF_NAME, strlen(GW_MODE_OFF_NAME)) == 0)
		gw_mode_tmp = GW_MODE_OFF;

	if (strncmp(buff, GW_MODE_CLIENT_NAME,
		   strlen(GW_MODE_CLIENT_NAME)) == 0)
		gw_mode_tmp = GW_MODE_CLIENT;

	if (strncmp(buff, GW_MODE_SERVER_NAME,
		   strlen(GW_MODE_SERVER_NAME)) == 0)
		gw_mode_tmp = GW_MODE_SERVER;

	if (gw_mode_tmp < 0) {
		bat_info(net_dev,
			 "Invalid parameter for 'gw mode' setting received: "
			 "%s\n", buff);
		return -EINVAL;
	}

	if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
		return count;

	switch (atomic_read(&bat_priv->gw_mode)) {
	case GW_MODE_CLIENT:
		curr_gw_mode_str = GW_MODE_CLIENT_NAME;
		break;
	case GW_MODE_SERVER:
		curr_gw_mode_str = GW_MODE_SERVER_NAME;
		break;
	default:
		curr_gw_mode_str = GW_MODE_OFF_NAME;
		break;
	}

	bat_info(net_dev, "Changing gw mode from: %s to: %s\n",
		 curr_gw_mode_str, buff);

	gw_deselect(bat_priv);
	atomic_set(&bat_priv->gw_mode, (unsigned)gw_mode_tmp);
	return count;
}

static ssize_t show_gw_bwidth(struct kobject *kobj, struct attribute *attr,
			      char *buff)
{
	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
	int down, up;
	int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);

	gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
	return sprintf(buff, "%i%s/%i%s\n",
		       (down > 2048 ? down / 1024 : down),
		       (down > 2048 ? "MBit" : "KBit"),
		       (up > 2048 ? up / 1024 : up),
		       (up > 2048 ? "MBit" : "KBit"));
}

static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr,
			       char *buff, size_t count)
{
	struct net_device *net_dev = kobj_to_netdev(kobj);

	if (buff[count - 1] == '\n')
		buff[count - 1] = '\0';

	return gw_bandwidth_set(net_dev, buff, count);
}

BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
BAT_ATTR_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
static BAT_ATTR(gw_mode, S_IRUGO | S_IWUSR, show_gw_mode, store_gw_mode);
BAT_ATTR_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
BAT_ATTR_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
BAT_ATTR_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
	      post_gw_deselect);
static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
		store_gw_bwidth);
#ifdef CONFIG_BATMAN_ADV_DEBUG
BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 7, NULL);
#endif

static struct bat_attribute *mesh_attrs[] = {
	&bat_attr_aggregated_ogms,
	&bat_attr_bonding,
	&bat_attr_fragmentation,
	&bat_attr_ap_isolation,
	&bat_attr_vis_mode,
	&bat_attr_gw_mode,
	&bat_attr_orig_interval,
	&bat_attr_hop_penalty,
	&bat_attr_gw_sel_class,
	&bat_attr_gw_bandwidth,
#ifdef CONFIG_BATMAN_ADV_DEBUG
	&bat_attr_log_level,
#endif
	NULL,
};

int sysfs_add_meshif(struct net_device *dev)
{
	struct kobject *batif_kobject = &dev->dev.kobj;
	struct bat_priv *bat_priv = netdev_priv(dev);
	struct bat_attribute **bat_attr;
	int err;

	bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
						    batif_kobject);
	if (!bat_priv->mesh_obj) {
		bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
			SYSFS_IF_MESH_SUBDIR);
		goto out;
	}

	for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr) {
		err = sysfs_create_file(bat_priv->mesh_obj,
					&((*bat_attr)->attr));
		if (err) {
			bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
				dev->name, SYSFS_IF_MESH_SUBDIR,
				((*bat_attr)->attr).name);
			goto rem_attr;
		}
	}

	return 0;

rem_attr:
	for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
		sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));

	kobject_put(bat_priv->mesh_obj);
	bat_priv->mesh_obj = NULL;
out:
	return -ENOMEM;
}

void sysfs_del_meshif(struct net_device *dev)
{
	struct bat_priv *bat_priv = netdev_priv(dev);
	struct bat_attribute **bat_attr;

	for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
		sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));

	kobject_put(bat_priv->mesh_obj);
	bat_priv->mesh_obj = NULL;
}

static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
			       char *buff)
{
	struct net_device *net_dev = kobj_to_netdev(kobj);
	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
	ssize_t length;

	if (!hard_iface)
		return 0;

	length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
			 "none" : hard_iface->soft_iface->name);

	hardif_free_ref(hard_iface);

	return length;
}

static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
				char *buff, size_t count)
{
	struct net_device *net_dev = kobj_to_netdev(kobj);
	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
	int status_tmp = -1;
	int ret = count;

	if (!hard_iface)
		return count;

	if (buff[count - 1] == '\n')
		buff[count - 1] = '\0';

	if (strlen(buff) >= IFNAMSIZ) {
		pr_err("Invalid parameter for 'mesh_iface' setting received: "
		       "interface name too long '%s'\n", buff);
		hardif_free_ref(hard_iface);
		return -EINVAL;
	}

	if (strncmp(buff, "none", 4) == 0)
		status_tmp = IF_NOT_IN_USE;
	else
		status_tmp = IF_I_WANT_YOU;

	if (hard_iface->if_status == status_tmp)
		goto out;

	if ((hard_iface->soft_iface) &&
	    (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
		goto out;

	if (!rtnl_trylock()) {
		ret = -ERESTARTSYS;
		goto out;
	}

	if (status_tmp == IF_NOT_IN_USE) {
		hardif_disable_interface(hard_iface);
		goto unlock;
	}

	/* if the interface already is in use */
	if (hard_iface->if_status != IF_NOT_IN_USE)
		hardif_disable_interface(hard_iface);

	ret = hardif_enable_interface(hard_iface, buff);

unlock:
	rtnl_unlock();
out:
	hardif_free_ref(hard_iface);
	return ret;
}

static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
				 char *buff)
{
	struct net_device *net_dev = kobj_to_netdev(kobj);
	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
	ssize_t length;

	if (!hard_iface)
		return 0;

	switch (hard_iface->if_status) {
	case IF_TO_BE_REMOVED:
		length = sprintf(buff, "disabling\n");
		break;
	case IF_INACTIVE:
		length = sprintf(buff, "inactive\n");
		break;
	case IF_ACTIVE:
		length = sprintf(buff, "active\n");
		break;
	case IF_TO_BE_ACTIVATED:
		length = sprintf(buff, "enabling\n");
		break;
	case IF_NOT_IN_USE:
	default:
		length = sprintf(buff, "not in use\n");
		break;
	}

	hardif_free_ref(hard_iface);

	return length;
}

static BAT_ATTR(mesh_iface, S_IRUGO | S_IWUSR,
		show_mesh_iface, store_mesh_iface);
static BAT_ATTR(iface_status, S_IRUGO, show_iface_status, NULL);

static struct bat_attribute *batman_attrs[] = {
	&bat_attr_mesh_iface,
	&bat_attr_iface_status,
	NULL,
};

int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
{
	struct kobject *hardif_kobject = &dev->dev.kobj;
	struct bat_attribute **bat_attr;
	int err;

	*hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
						    hardif_kobject);

	if (!*hardif_obj) {
		bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
			SYSFS_IF_BAT_SUBDIR);
		goto out;
	}

	for (bat_attr = batman_attrs; *bat_attr; ++bat_attr) {
		err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
		if (err) {
			bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
				dev->name, SYSFS_IF_BAT_SUBDIR,
				((*bat_attr)->attr).name);
			goto rem_attr;
		}
	}

	return 0;

rem_attr:
	for (bat_attr = batman_attrs; *bat_attr; ++bat_attr)
		sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
out:
	return -ENOMEM;
}

void sysfs_del_hardif(struct kobject **hardif_obj)
{
	kobject_put(*hardif_obj);
	*hardif_obj = NULL;
}

int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
		 enum uev_action action, const char *data)
{
	int ret = -1;
	struct hard_iface *primary_if = NULL;
	struct kobject *bat_kobj;
	char *uevent_env[4] = { NULL, NULL, NULL, NULL };

	primary_if = primary_if_get_selected(bat_priv);
	if (!primary_if)
		goto out;

	bat_kobj = &primary_if->soft_iface->dev.kobj;

	uevent_env[0] = kmalloc(strlen(UEV_TYPE_VAR) +
				strlen(uev_type_str[type]) + 1,
				GFP_ATOMIC);
	if (!uevent_env[0])
		goto out;

	sprintf(uevent_env[0], "%s%s", UEV_TYPE_VAR, uev_type_str[type]);

	uevent_env[1] = kmalloc(strlen(UEV_ACTION_VAR) +
				strlen(uev_action_str[action]) + 1,
				GFP_ATOMIC);
	if (!uevent_env[1])
		goto out;

	sprintf(uevent_env[1], "%s%s", UEV_ACTION_VAR, uev_action_str[action]);

	/* If the event is DEL, ignore the data field */
	if (action != UEV_DEL) {
		uevent_env[2] = kmalloc(strlen(UEV_DATA_VAR) +
					strlen(data) + 1, GFP_ATOMIC);
		if (!uevent_env[2])
			goto out;

		sprintf(uevent_env[2], "%s%s", UEV_DATA_VAR, data);
	}

	ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
out:
	kfree(uevent_env[0]);
	kfree(uevent_env[1]);
	kfree(uevent_env[2]);

	if (primary_if)
		hardif_free_ref(primary_if);

	if (ret)
		bat_dbg(DBG_BATMAN, bat_priv, "Impossible to send "
			"uevent for (%s,%s,%s) event (err: %d)\n",
			uev_type_str[type], uev_action_str[action],
			(action == UEV_DEL ? "NULL" : data), ret);
	return ret;
}
Commit	Line	Data
c6c8fea2	1	/*
64afe353	2	* Copyright (C) 2010-2011 B.A.T.M.A.N. contributors:
c6c8fea2 SE	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
3d222bba SE	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
	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	}
c6c8fea2	42
c6bda689 AQ	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
c6c8fea2 SE	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
	119	static int store_bool_attr(char *buff, size_t count,
	120	struct net_device *net_dev,
747e4221	121	const char attr_name, atomic_t attr)
c6c8fea2 SE	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
	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
747e4221	163	ret = store_bool_attr(buff, count, net_dev, attr->name, attr_store);
c6c8fea2 SE	164	if (post_func && ret)
	165	post_func(net_dev);
	166
	167	return ret;
	168	}
	169
747e4221 SE	170	static int store_uint_attr(const char *buff, size_t count,
747e4221 SE	171	struct net_device net_dev, const char attr_name,
c6c8fea2 SE	172	unsigned int min, unsigned int max, atomic_t *attr)
	173	{
	174	unsigned long uint_val;
	175	int ret;
	176
	177	ret = strict_strtoul(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
747e4221	207	static inline ssize_t __store_uint_attr(const char *buff, size_t count,
c6c8fea2 SE	208	int min, int max,
c6c8fea2 SE	209	void (post_func)(struct net_device ),
747e4221	210	const struct attribute *attr,
c6c8fea2 SE	211	atomic_t attr_store, struct net_device net_dev)
	212	{
	213	int ret;
	214
747e4221	215	ret = store_uint_attr(buff, count, net_dev, attr->name,
c6c8fea2 SE	216	min, max, attr_store);
	217	if (post_func && ret)
	218	post_func(net_dev);
	219
	220	return ret;
	221	}
	222
	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
	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 = strict_strtoul(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: "
	259	"%s\n", 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
	275	static void post_gw_deselect(struct net_device *net_dev)
	276	{
	277	struct bat_priv *bat_priv = netdev_priv(net_dev);
	278	gw_deselect(bat_priv);
	279	}
280
281	static ssize_t show_gw_mode(struct kobject kobj, struct attribute attr,
282	char *buff)
283	{
284	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
285	int bytes_written;
286
287	switch (atomic_read(&bat_priv->gw_mode)) {
288	case GW_MODE_CLIENT:
289	bytes_written = sprintf(buff, "%s\n", GW_MODE_CLIENT_NAME);
290	break;
291	case GW_MODE_SERVER:
292	bytes_written = sprintf(buff, "%s\n", GW_MODE_SERVER_NAME);
293	break;
294	default:
295	bytes_written = sprintf(buff, "%s\n", GW_MODE_OFF_NAME);
296	break;
297	}
298
299	return bytes_written;
300	}
301
302	static ssize_t store_gw_mode(struct kobject kobj, struct attribute attr,
303	char *buff, size_t count)
304	{
305	struct net_device *net_dev = kobj_to_netdev(kobj);
306	struct bat_priv *bat_priv = netdev_priv(net_dev);
307	char *curr_gw_mode_str;
308	int gw_mode_tmp = -1;
309
310	if (buff[count - 1] == '\n')
311	buff[count - 1] = '\0';
312
313	if (strncmp(buff, GW_MODE_OFF_NAME, strlen(GW_MODE_OFF_NAME)) == 0)
314	gw_mode_tmp = GW_MODE_OFF;
315
316	if (strncmp(buff, GW_MODE_CLIENT_NAME,
317	strlen(GW_MODE_CLIENT_NAME)) == 0)
318	gw_mode_tmp = GW_MODE_CLIENT;
319
320	if (strncmp(buff, GW_MODE_SERVER_NAME,
321	strlen(GW_MODE_SERVER_NAME)) == 0)
322	gw_mode_tmp = GW_MODE_SERVER;
323
324	if (gw_mode_tmp < 0) {
325	bat_info(net_dev,
326	"Invalid parameter for 'gw mode' setting received: "
327	"%s\n", buff);
328	return -EINVAL;
329	}
330
331	if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
332	return count;
333
334	switch (atomic_read(&bat_priv->gw_mode)) {
335	case GW_MODE_CLIENT:
336	curr_gw_mode_str = GW_MODE_CLIENT_NAME;
337	break;
338	case GW_MODE_SERVER:
339	curr_gw_mode_str = GW_MODE_SERVER_NAME;
340	break;
341	default:
342	curr_gw_mode_str = GW_MODE_OFF_NAME;
343	break;
344	}
345
346	bat_info(net_dev, "Changing gw mode from: %s to: %s\n",
347	curr_gw_mode_str, buff);
348
349	gw_deselect(bat_priv);
350	atomic_set(&bat_priv->gw_mode, (unsigned)gw_mode_tmp);
351	return count;
352	}
353
354	static ssize_t show_gw_bwidth(struct kobject kobj, struct attribute attr,
355	char *buff)
356	{
357	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
358	int down, up;
359	int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
360
361	gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
362	return sprintf(buff, "%i%s/%i%s\n",
363	(down > 2048 ? down / 1024 : down),
364	(down > 2048 ? "MBit" : "KBit"),
365	(up > 2048 ? up / 1024 : up),
366	(up > 2048 ? "MBit" : "KBit"));
367	}
368
369	static ssize_t store_gw_bwidth(struct kobject kobj, struct attribute attr,
370	char *buff, size_t count)
371	{
372	struct net_device *net_dev = kobj_to_netdev(kobj);
373
374	if (buff[count - 1] == '\n')
375	buff[count - 1] = '\0';
376
377	return gw_bandwidth_set(net_dev, buff, count);
378	}
379
380	BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO \| S_IWUSR, NULL);
381	BAT_ATTR_BOOL(bonding, S_IRUGO \| S_IWUSR, NULL);
382	BAT_ATTR_BOOL(fragmentation, S_IRUGO \| S_IWUSR, update_min_mtu);
59b699cd	383	BAT_ATTR_BOOL(ap_isolation, S_IRUGO \| S_IWUSR, NULL);
c6c8fea2 SE	384	static BAT_ATTR(vis_mode, S_IRUGO \| S_IWUSR, show_vis_mode, store_vis_mode);
	385	static BAT_ATTR(gw_mode, S_IRUGO \| S_IWUSR, show_gw_mode, store_gw_mode);
	386	BAT_ATTR_UINT(orig_interval, S_IRUGO \| S_IWUSR, 2 * JITTER, INT_MAX, NULL);
	387	BAT_ATTR_UINT(hop_penalty, S_IRUGO \| S_IWUSR, 0, TQ_MAX_VALUE, NULL);
	388	BAT_ATTR_UINT(gw_sel_class, S_IRUGO \| S_IWUSR, 1, TQ_MAX_VALUE,
	389	post_gw_deselect);
	390	static BAT_ATTR(gw_bandwidth, S_IRUGO \| S_IWUSR, show_gw_bwidth,
	391	store_gw_bwidth);
	392	#ifdef CONFIG_BATMAN_ADV_DEBUG
a73105b8	393	BAT_ATTR_UINT(log_level, S_IRUGO \| S_IWUSR, 0, 7, NULL);
c6c8fea2 SE	394	#endif
	395
	396	static struct bat_attribute *mesh_attrs[] = {
	397	&bat_attr_aggregated_ogms,
	398	&bat_attr_bonding,
	399	&bat_attr_fragmentation,
59b699cd	400	&bat_attr_ap_isolation,
c6c8fea2 SE	401	&bat_attr_vis_mode,
	402	&bat_attr_gw_mode,
	403	&bat_attr_orig_interval,
	404	&bat_attr_hop_penalty,
	405	&bat_attr_gw_sel_class,
	406	&bat_attr_gw_bandwidth,
	407	#ifdef CONFIG_BATMAN_ADV_DEBUG
	408	&bat_attr_log_level,
	409	#endif
	410	NULL,
	411	};
	412
	413	int sysfs_add_meshif(struct net_device *dev)
	414	{
	415	struct kobject *batif_kobject = &dev->dev.kobj;
	416	struct bat_priv *bat_priv = netdev_priv(dev);
	417	struct bat_attribute **bat_attr;
	418	int err;
	419
	420	bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
	421	batif_kobject);
	422	if (!bat_priv->mesh_obj) {
	423	bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
	424	SYSFS_IF_MESH_SUBDIR);
	425	goto out;
	426	}
	427
	428	for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr) {
	429	err = sysfs_create_file(bat_priv->mesh_obj,
	430	&((*bat_attr)->attr));
	431	if (err) {
	432	bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
	433	dev->name, SYSFS_IF_MESH_SUBDIR,
	434	((*bat_attr)->attr).name);
	435	goto rem_attr;
	436	}
	437	}
	438
	439	return 0;
	440
	441	rem_attr:
	442	for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
	443	sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
	444
	445	kobject_put(bat_priv->mesh_obj);
	446	bat_priv->mesh_obj = NULL;
	447	out:
	448	return -ENOMEM;
	449	}
	450
	451	void sysfs_del_meshif(struct net_device *dev)
	452	{
	453	struct bat_priv *bat_priv = netdev_priv(dev);
	454	struct bat_attribute **bat_attr;
	455
	456	for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
	457	sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
	458
	459	kobject_put(bat_priv->mesh_obj);
	460	bat_priv->mesh_obj = NULL;
	461	}
	462
	463	static ssize_t show_mesh_iface(struct kobject kobj, struct attribute attr,
	464	char *buff)
465	{
466	struct net_device *net_dev = kobj_to_netdev(kobj);
e6c10f43	467	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
c6c8fea2 SE	468	ssize_t length;
c6c8fea2 SE	469
e6c10f43	470	if (!hard_iface)
c6c8fea2 SE	471	return 0;
c6c8fea2 SE	472
e6c10f43 ML	473	length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
e6c10f43 ML	474	"none" : hard_iface->soft_iface->name);
c6c8fea2	475
e6c10f43	476	hardif_free_ref(hard_iface);
c6c8fea2 SE	477
	478	return length;
	479	}
	480
	481	static ssize_t store_mesh_iface(struct kobject kobj, struct attribute attr,
	482	char *buff, size_t count)
	483	{
	484	struct net_device *net_dev = kobj_to_netdev(kobj);
e6c10f43	485	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
c6c8fea2	486	int status_tmp = -1;
ed75ccbe	487	int ret = count;
c6c8fea2	488
e6c10f43	489	if (!hard_iface)
c6c8fea2 SE	490	return count;
	491
	492	if (buff[count - 1] == '\n')
	493	buff[count - 1] = '\0';
	494
	495	if (strlen(buff) >= IFNAMSIZ) {
	496	pr_err("Invalid parameter for 'mesh_iface' setting received: "
	497	"interface name too long '%s'\n", buff);
e6c10f43	498	hardif_free_ref(hard_iface);
c6c8fea2 SE	499	return -EINVAL;
	500	}
	501
	502	if (strncmp(buff, "none", 4) == 0)
	503	status_tmp = IF_NOT_IN_USE;
	504	else
	505	status_tmp = IF_I_WANT_YOU;
	506
e6c10f43 ML	507	if (hard_iface->if_status == status_tmp)
	508	goto out;
	509
	510	if ((hard_iface->soft_iface) &&
	511	(strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
ed75ccbe	512	goto out;
c6c8fea2	513
3a4375a9 SE	514	if (!rtnl_trylock()) {
	515	ret = -ERESTARTSYS;
	516	goto out;
	517	}
	518
c6c8fea2	519	if (status_tmp == IF_NOT_IN_USE) {
e6c10f43	520	hardif_disable_interface(hard_iface);
3a4375a9	521	goto unlock;
c6c8fea2 SE	522	}
	523
	524	/* if the interface already is in use */
3a4375a9	525	if (hard_iface->if_status != IF_NOT_IN_USE)
e6c10f43	526	hardif_disable_interface(hard_iface);
c6c8fea2	527
e6c10f43	528	ret = hardif_enable_interface(hard_iface, buff);
c6c8fea2	529
3a4375a9 SE	530	unlock:
3a4375a9 SE	531	rtnl_unlock();
ed75ccbe	532	out:
e6c10f43	533	hardif_free_ref(hard_iface);
c6c8fea2 SE	534	return ret;
	535	}
	536
	537	static ssize_t show_iface_status(struct kobject kobj, struct attribute attr,
	538	char *buff)
	539	{
	540	struct net_device *net_dev = kobj_to_netdev(kobj);
e6c10f43	541	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
c6c8fea2 SE	542	ssize_t length;
c6c8fea2 SE	543
e6c10f43	544	if (!hard_iface)
c6c8fea2 SE	545	return 0;
c6c8fea2 SE	546
e6c10f43	547	switch (hard_iface->if_status) {
c6c8fea2 SE	548	case IF_TO_BE_REMOVED:
	549	length = sprintf(buff, "disabling\n");
	550	break;
	551	case IF_INACTIVE:
	552	length = sprintf(buff, "inactive\n");
	553	break;
	554	case IF_ACTIVE:
	555	length = sprintf(buff, "active\n");
	556	break;
	557	case IF_TO_BE_ACTIVATED:
	558	length = sprintf(buff, "enabling\n");
	559	break;
	560	case IF_NOT_IN_USE:
	561	default:
	562	length = sprintf(buff, "not in use\n");
	563	break;
	564	}
	565
e6c10f43	566	hardif_free_ref(hard_iface);
c6c8fea2 SE	567
	568	return length;
	569	}
	570
	571	static BAT_ATTR(mesh_iface, S_IRUGO \| S_IWUSR,
	572	show_mesh_iface, store_mesh_iface);
	573	static BAT_ATTR(iface_status, S_IRUGO, show_iface_status, NULL);
	574
	575	static struct bat_attribute *batman_attrs[] = {
	576	&bat_attr_mesh_iface,
	577	&bat_attr_iface_status,
	578	NULL,
	579	};
	580
	581	int sysfs_add_hardif(struct kobject *hardif_obj, struct net_device dev)
	582	{
	583	struct kobject *hardif_kobject = &dev->dev.kobj;
	584	struct bat_attribute **bat_attr;
	585	int err;
	586
	587	*hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
	588	hardif_kobject);
	589
	590	if (!*hardif_obj) {
	591	bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
	592	SYSFS_IF_BAT_SUBDIR);
	593	goto out;
	594	}
	595
	596	for (bat_attr = batman_attrs; *bat_attr; ++bat_attr) {
	597	err = sysfs_create_file(hardif_obj, &((bat_attr)->attr));
	598	if (err) {
	599	bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
	600	dev->name, SYSFS_IF_BAT_SUBDIR,
	601	((*bat_attr)->attr).name);
	602	goto rem_attr;
	603	}
	604	}
	605
	606	return 0;
	607
	608	rem_attr:
	609	for (bat_attr = batman_attrs; *bat_attr; ++bat_attr)
	610	sysfs_remove_file(hardif_obj, &((bat_attr)->attr));
	611	out:
	612	return -ENOMEM;
	613	}
	614
	615	void sysfs_del_hardif(struct kobject **hardif_obj)
	616	{
	617	kobject_put(*hardif_obj);
	618	*hardif_obj = NULL;
	619	}
c6bda689 AQ	620
	621	int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
	622	enum uev_action action, const char *data)
	623	{
	624	int ret = -1;
	625	struct hard_iface *primary_if = NULL;
	626	struct kobject *bat_kobj;
	627	char *uevent_env[4] = { NULL, NULL, NULL, NULL };
	628
	629	primary_if = primary_if_get_selected(bat_priv);
	630	if (!primary_if)
	631	goto out;
	632
	633	bat_kobj = &primary_if->soft_iface->dev.kobj;
	634
	635	uevent_env[0] = kmalloc(strlen(UEV_TYPE_VAR) +
	636	strlen(uev_type_str[type]) + 1,
	637	GFP_ATOMIC);
	638	if (!uevent_env[0])
	639	goto out;
	640
	641	sprintf(uevent_env[0], "%s%s", UEV_TYPE_VAR, uev_type_str[type]);
	642
	643	uevent_env[1] = kmalloc(strlen(UEV_ACTION_VAR) +
	644	strlen(uev_action_str[action]) + 1,
	645	GFP_ATOMIC);
	646	if (!uevent_env[1])
	647	goto out;
	648
	649	sprintf(uevent_env[1], "%s%s", UEV_ACTION_VAR, uev_action_str[action]);
	650
	651	/* If the event is DEL, ignore the data field */
	652	if (action != UEV_DEL) {
	653	uevent_env[2] = kmalloc(strlen(UEV_DATA_VAR) +
	654	strlen(data) + 1, GFP_ATOMIC);
	655	if (!uevent_env[2])
	656	goto out;
	657
	658	sprintf(uevent_env[2], "%s%s", UEV_DATA_VAR, data);
	659	}
	660
	661	ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
	662	out:
	663	kfree(uevent_env[0]);
	664	kfree(uevent_env[1]);
	665	kfree(uevent_env[2]);
	666
	667	if (primary_if)
	668	hardif_free_ref(primary_if);
	669
	670	if (ret)
	671	bat_dbg(DBG_BATMAN, bat_priv, "Impossible to send "
	672	"uevent for (%s,%s,%s) event (err: %d)\n",
	673	uev_type_str[type], uev_action_str[action],
	674	(action == UEV_DEL ? "NULL" : data), ret);
	675	return ret;
	676	}