Release 4.11 net/rfkill/core.c

/*
 * Copyright (C) 2006 - 2007 Ivo van Doorn
 * Copyright (C) 2007 Dmitry Torokhov
 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/workqueue.h>
#include <linux/capability.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/rfkill.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/device.h>
#include <linux/miscdevice.h>
#include <linux/wait.h>
#include <linux/poll.h>
#include <linux/fs.h>
#include <linux/slab.h>

#include "rfkill.h"


#define POLL_INTERVAL		(5 * HZ)


#define RFKILL_BLOCK_HW		BIT(0)

#define RFKILL_BLOCK_SW		BIT(1)

#define RFKILL_BLOCK_SW_PREV	BIT(2)

#define RFKILL_BLOCK_ANY	(RFKILL_BLOCK_HW |\
                                 RFKILL_BLOCK_SW |\
                                 RFKILL_BLOCK_SW_PREV)

#define RFKILL_BLOCK_SW_SETCALL	BIT(31)


struct rfkill {
	
spinlock_t		lock;

	
enum rfkill_type	type;

	
unsigned long		state;

	
u32			idx;

	
bool			registered;
	
bool			persistent;
	
bool			polling_paused;
	
bool			suspended;

	
const struct rfkill_ops	*ops;
	
void			*data;

#ifdef CONFIG_RFKILL_LEDS
	
struct led_trigger	led_trigger;
	
const char		*ledtrigname;
#endif

	
struct device		dev;
	
struct list_head	node;

	
struct delayed_work	poll_work;
	
struct work_struct	uevent_work;
	
struct work_struct	sync_work;
	
char			name[];
};

#define to_rfkill(d)	container_of(d, struct rfkill, dev)


struct rfkill_int_event {
	
struct list_head	list;
	
struct rfkill_event	ev;
};


struct rfkill_data {
	
struct list_head	list;
	
struct list_head	events;
	
struct mutex		mtx;
	
wait_queue_head_t	read_wait;
	
bool			input_handler;
};


MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
MODULE_DESCRIPTION("RF switch support");
MODULE_LICENSE("GPL");


/*
 * The locking here should be made much smarter, we currently have
 * a bit of a stupid situation because drivers might want to register
 * the rfkill struct under their own lock, and take this lock during
 * rfkill method calls -- which will cause an AB-BA deadlock situation.
 *
 * To fix that, we need to rework this code here to be mostly lock-free
 * and only use the mutex for list manipulations, not to protect the
 * various other global variables. Then we can avoid holding the mutex
 * around driver operations, and all is happy.
 */
static LIST_HEAD(rfkill_list);	/* list of registered rf switches */
static DEFINE_MUTEX(rfkill_global_mutex);
static LIST_HEAD(rfkill_fds);	/* list of open fds of /dev/rfkill */


static unsigned int rfkill_default_state = 1;
module_param_named(default_state, rfkill_default_state, uint, 0444);
MODULE_PARM_DESC(default_state,
		 "Default initial state for all radio types, 0 = radio off");

static struct {
	

bool cur, sav;
} 
rfkill_global_states[NUM_RFKILL_TYPES];


static bool rfkill_epo_lock_active;


#ifdef CONFIG_RFKILL_LEDS


static void rfkill_led_trigger_event(struct rfkill *rfkill)
{
	struct led_trigger *trigger;

	if (!rfkill->registered)
		return;

	trigger = &rfkill->led_trigger;

	if (rfkill->state & RFKILL_BLOCK_ANY)
		led_trigger_event(trigger, LED_OFF);
	else
		led_trigger_event(trigger, LED_FULL);
}

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static void rfkill_led_trigger_activate(struct led_classdev *led)
{
	struct rfkill *rfkill;

	rfkill = container_of(led->trigger, struct rfkill, led_trigger);

	rfkill_led_trigger_event(rfkill);
}

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const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
{
	return rfkill->led_trigger.name;
}
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EXPORT_SYMBOL(rfkill_get_led_trigger_name);



void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
{
	BUG_ON(!rfkill);

	rfkill->ledtrigname = name;
}
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EXPORT_SYMBOL(rfkill_set_led_trigger_name);



static int rfkill_led_trigger_register(struct rfkill *rfkill)
{
	rfkill->led_trigger.name = rfkill->ledtrigname
					? : dev_name(&rfkill->dev);
	rfkill->led_trigger.activate = rfkill_led_trigger_activate;
	return led_trigger_register(&rfkill->led_trigger);
}

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static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
{
	led_trigger_unregister(&rfkill->led_trigger);
}

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static struct led_trigger rfkill_any_led_trigger;

static struct work_struct rfkill_any_work;



static void rfkill_any_led_trigger_worker(struct work_struct *work)
{
	enum led_brightness brightness = LED_OFF;
	struct rfkill *rfkill;

	mutex_lock(&rfkill_global_mutex);
	list_for_each_entry(rfkill, &rfkill_list, node) {
		if (!(rfkill->state & RFKILL_BLOCK_ANY)) {
			brightness = LED_FULL;
			break;
		}
	}
	mutex_unlock(&rfkill_global_mutex);

	led_trigger_event(&rfkill_any_led_trigger, brightness);
}

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static void rfkill_any_led_trigger_event(void)
{
	schedule_work(&rfkill_any_work);
}

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static void rfkill_any_led_trigger_activate(struct led_classdev *led_cdev)
{
	rfkill_any_led_trigger_event();
}

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static int rfkill_any_led_trigger_register(void)
{
	INIT_WORK(&rfkill_any_work, rfkill_any_led_trigger_worker);
	rfkill_any_led_trigger.name = "rfkill-any";
	rfkill_any_led_trigger.activate = rfkill_any_led_trigger_activate;
	return led_trigger_register(&rfkill_any_led_trigger);
}

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static void rfkill_any_led_trigger_unregister(void)
{
	led_trigger_unregister(&rfkill_any_led_trigger);
	cancel_work_sync(&rfkill_any_work);
}
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#else


static void rfkill_led_trigger_event(struct rfkill *rfkill)
{
}

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static inline int rfkill_led_trigger_register(struct rfkill *rfkill)
{
	return 0;
}

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static inline void rfkill_led_trigger_unregister(struct rfkill *rfkill)
{
}

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static void rfkill_any_led_trigger_event(void)
{
}

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static int rfkill_any_led_trigger_register(void)
{
	return 0;
}

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static void rfkill_any_led_trigger_unregister(void)
{
}
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#endif /* CONFIG_RFKILL_LEDS */



static void rfkill_fill_event(struct rfkill_event *ev, struct rfkill *rfkill,
			      enum rfkill_operation op)
{
	unsigned long flags;

	ev->idx = rfkill->idx;
	ev->type = rfkill->type;
	ev->op = op;

	spin_lock_irqsave(&rfkill->lock, flags);
	ev->hard = !!(rfkill->state & RFKILL_BLOCK_HW);
	ev->soft = !!(rfkill->state & (RFKILL_BLOCK_SW |
					RFKILL_BLOCK_SW_PREV));
	spin_unlock_irqrestore(&rfkill->lock, flags);
}

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static void rfkill_send_events(struct rfkill *rfkill, enum rfkill_operation op)
{
	struct rfkill_data *data;
	struct rfkill_int_event *ev;

	list_for_each_entry(data, &rfkill_fds, list) {
		ev = kzalloc(sizeof(*ev), GFP_KERNEL);
		if (!ev)
			continue;
		rfkill_fill_event(&ev->ev, rfkill, op);
		mutex_lock(&data->mtx);
		list_add_tail(&ev->list, &data->events);
		mutex_unlock(&data->mtx);
		wake_up_interruptible(&data->read_wait);
	}
}

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static void rfkill_event(struct rfkill *rfkill)
{
	if (!rfkill->registered)
		return;

	kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);

	/* also send event to /dev/rfkill */
	rfkill_send_events(rfkill, RFKILL_OP_CHANGE);
}

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/**
 * rfkill_set_block - wrapper for set_block method
 *
 * @rfkill: the rfkill struct to use
 * @blocked: the new software state
 *
 * Calls the set_block method (when applicable) and handles notifications
 * etc. as well.
 */


static void rfkill_set_block(struct rfkill *rfkill, bool blocked)
{
	unsigned long flags;
	bool prev, curr;
	int err;

	if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP))
		return;

	/*
         * Some platforms (...!) generate input events which affect the
         * _hard_ kill state -- whenever something tries to change the
         * current software state query the hardware state too.
         */
	if (rfkill->ops->query)
		rfkill->ops->query(rfkill, rfkill->data);

	spin_lock_irqsave(&rfkill->lock, flags);
	prev = rfkill->state & RFKILL_BLOCK_SW;

	if (prev)
		rfkill->state |= RFKILL_BLOCK_SW_PREV;
	else
		rfkill->state &= ~RFKILL_BLOCK_SW_PREV;

	if (blocked)
		rfkill->state |= RFKILL_BLOCK_SW;
	else
		rfkill->state &= ~RFKILL_BLOCK_SW;

	rfkill->state |= RFKILL_BLOCK_SW_SETCALL;
	spin_unlock_irqrestore(&rfkill->lock, flags);

	err = rfkill->ops->set_block(rfkill->data, blocked);

	spin_lock_irqsave(&rfkill->lock, flags);
	if (err) {
		/*
                 * Failed -- reset status to _PREV, which may be different
                 * from what we have set _PREV to earlier in this function
                 * if rfkill_set_sw_state was invoked.
                 */
		if (rfkill->state & RFKILL_BLOCK_SW_PREV)
			rfkill->state |= RFKILL_BLOCK_SW;
		else
			rfkill->state &= ~RFKILL_BLOCK_SW;
	}
	rfkill->state &= ~RFKILL_BLOCK_SW_SETCALL;
	rfkill->state &= ~RFKILL_BLOCK_SW_PREV;
	curr = rfkill->state & RFKILL_BLOCK_SW;
	spin_unlock_irqrestore(&rfkill->lock, flags);

	rfkill_led_trigger_event(rfkill);
	rfkill_any_led_trigger_event();

	if (prev != curr)
		rfkill_event(rfkill);
}

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static void rfkill_update_global_state(enum rfkill_type type, bool blocked)
{
	int i;

	if (type != RFKILL_TYPE_ALL) {
		rfkill_global_states[type].cur = blocked;
		return;
	}

	for (i = 0; i < NUM_RFKILL_TYPES; i++)
		rfkill_global_states[i].cur = blocked;
}

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#ifdef CONFIG_RFKILL_INPUT

static atomic_t rfkill_input_disabled = ATOMIC_INIT(0);

/**
 * __rfkill_switch_all - Toggle state of all switches of given type
 * @type: type of interfaces to be affected
 * @blocked: the new state
 *
 * This function sets the state of all switches of given type,
 * unless a specific switch is suspended.
 *
 * Caller must have acquired rfkill_global_mutex.
 */


static void __rfkill_switch_all(const enum rfkill_type type, bool blocked)
{
	struct rfkill *rfkill;

	rfkill_update_global_state(type, blocked);
	list_for_each_entry(rfkill, &rfkill_list, node) {
		if (rfkill->type != type && type != RFKILL_TYPE_ALL)
			continue;

		rfkill_set_block(rfkill, blocked);
	}
}

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/**
 * rfkill_switch_all - Toggle state of all switches of given type
 * @type: type of interfaces to be affected
 * @blocked: the new state
 *
 * Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state).
 * Please refer to __rfkill_switch_all() for details.
 *
 * Does nothing if the EPO lock is active.
 */


void rfkill_switch_all(enum rfkill_type type, bool blocked)
{
	if (atomic_read(&rfkill_input_disabled))
		return;

	mutex_lock(&rfkill_global_mutex);

	if (!rfkill_epo_lock_active)
		__rfkill_switch_all(type, blocked);

	mutex_unlock(&rfkill_global_mutex);
}

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/**
 * rfkill_epo - emergency power off all transmitters
 *
 * This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED,
 * ignoring everything in its path but rfkill_global_mutex and rfkill->mutex.
 *
 * The global state before the EPO is saved and can be restored later
 * using rfkill_restore_states().
 */


void rfkill_epo(void)
{
	struct rfkill *rfkill;
	int i;

	if (atomic_read(&rfkill_input_disabled))
		return;

	mutex_lock(&rfkill_global_mutex);

	rfkill_epo_lock_active = true;
	list_for_each_entry(rfkill, &rfkill_list, node)
		rfkill_set_block(rfkill, true);

	for (i = 0; i < NUM_RFKILL_TYPES; i++) {
		rfkill_global_states[i].sav = rfkill_global_states[i].cur;
		rfkill_global_states[i].cur = true;
	}

	mutex_unlock(&rfkill_global_mutex);
}

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/**
 * rfkill_restore_states - restore global states
 *
 * Restore (and sync switches to) the global state from the
 * states in rfkill_default_states.  This can undo the effects of
 * a call to rfkill_epo().
 */


void rfkill_restore_states(void)
{
	int i;

	if (atomic_read(&rfkill_input_disabled))
		return;

	mutex_lock(&rfkill_global_mutex);

	rfkill_epo_lock_active = false;
	for (i = 0; i < NUM_RFKILL_TYPES; i++)
		__rfkill_switch_all(i, rfkill_global_states[i].sav);
	mutex_unlock(&rfkill_global_mutex);
}

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/**
 * rfkill_remove_epo_lock - unlock state changes
 *
 * Used by rfkill-input manually unlock state changes, when
 * the EPO switch is deactivated.
 */


void rfkill_remove_epo_lock(void)
{
	if (atomic_read(&rfkill_input_disabled))
		return;

	mutex_lock(&rfkill_global_mutex);
	rfkill_epo_lock_active = false;
	mutex_unlock(&rfkill_global_mutex);
}

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/**
 * rfkill_is_epo_lock_active - returns true EPO is active
 *
 * Returns 0 (false) if there is NOT an active EPO contidion,
 * and 1 (true) if there is an active EPO contition, which
 * locks all radios in one of the BLOCKED states.
 *
 * Can be called in atomic context.
 */


bool rfkill_is_epo_lock_active(void)
{
	return rfkill_epo_lock_active;
}

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/**
 * rfkill_get_global_sw_state - returns global state for a type
 * @type: the type to get the global state of
 *
 * Returns the current global state for a given wireless
 * device type.
 */


bool rfkill_get_global_sw_state(const enum rfkill_type type)
{
	return rfkill_global_states[type].cur;
}
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#endif



bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
{
	unsigned long flags;
	bool ret, prev;

	BUG_ON(!rfkill);

	spin_lock_irqsave(&rfkill->lock, flags);
	prev = !!(rfkill->state & RFKILL_BLOCK_HW);
	if (blocked)
		rfkill->state |= RFKILL_BLOCK_HW;
	else
		rfkill->state &= ~RFKILL_BLOCK_HW;
	ret = !!(rfkill->state & RFKILL_BLOCK_ANY);
	spin_unlock_irqrestore(&rfkill->lock, flags);

	rfkill_led_trigger_event(rfkill);
	rfkill_any_led_trigger_event();

	if (rfkill->registered && prev != blocked)
		schedule_work(&rfkill->uevent_work);

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
João Paulo Rechi Vita
72
60.50%
1
20.00%
Johannes Berg
30
25.21%
2
40.00%
Henrique de Moraes Holschuh
14
11.76%
1
20.00%
Michał Kępień
3
2.52%
1
20.00%
Total
119
100.00%
5
100.00%


EXPORT_SYMBOL(rfkill_set_hw_state);



static void __rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
{
	u32 bit = RFKILL_BLOCK_SW;

	/* if in a ops->set_block right now, use other bit */
	if (rfkill->state & RFKILL_BLOCK_SW_SETCALL)
		bit = RFKILL_BLOCK_SW_PREV;

	if (blocked)
		rfkill->state |= bit;
	else
		rfkill->state &= ~bit;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johannes Berg
46
92.00%
1
50.00%
Henrique de Moraes Holschuh
4
8.00%
1
50.00%
Total
50
100.00%
2
100.00%



bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
{
	unsigned long flags;
	bool prev, hwblock;

	BUG_ON(!rfkill);

	spin_lock_irqsave(&rfkill->lock, flags);
	prev = !!(rfkill->state & RFKILL_BLOCK_SW);
	__rfkill_set_sw_state(rfkill, blocked);
	hwblock = !!(rfkill->state & RFKILL_BLOCK_HW);
	blocked = blocked || hwblock;
	spin_unlock_irqrestore(&rfkill->lock, flags);

	if (!rfkill->registered)
		return blocked;

	if (prev != blocked && !hwblock)
		schedule_work(&rfkill->uevent_work);

	rfkill_led_trigger_event(rfkill);
	rfkill_any_led_trigger_event();

	return blocked;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Johannes Berg
98
79.67%
1
20.00%
Henrique de Moraes Holschuh
19
15.45%
2
40.00%
Michał Kępień
3
2.44%
1
20.00%
Alan Jenkins
3
2.44%
1
20.00%
Total
123
100.00%
5
100.00%


EXPORT_SYMBOL(rfkill_set_sw_state);



void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
{
	unsigned long flags;

	BUG_ON(!rfkill);
	BUG_ON(rfkill->registered);

	spin_lock_irqsave(&rfkill->lock, flags);
	__rfkill_set_sw_state(rfkill, blocked);
	rfkill->persistent = true;
	spin_unlock_irqrestore(&rfkill->lock, flags);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Jenkins
63
100.00%
1
100.00%
Total
63
100.00%
1
100.00%


EXPORT_SYMBOL(rfkill_init_sw_state);



void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
{
	unsigned long flags;
	bool swprev, hwprev;

	BUG_ON(!rfkill);

	spin_lock_irqsave(&rfkill->lock, flags);

	/*
         * No need to care about prev/setblock ... this is for uevent only
         * and that will get triggered by rfkill_set_block anyway.
         */
	swprev = !!(rfkill->state & RFKILL_BLOCK_SW);
	hwprev = !!(rfkill->state & RFKILL_BLOCK_HW);
	__rfkill_set_sw_state(rfkill, sw);
	if (hw)
		rfkill->state |= RFKILL_BLOCK_HW;
	else
		rfkill->state &= ~RFKILL_BLOCK_HW;

	spin_unlock_irqrestore(&rfkill->lock, flags);

	if (!rfkill->registered) {
		rfkill->persistent = true;
	} else {
		if (swprev != sw || hwprev != hw)
			schedule_work(&rfkill->uevent_work);

		rfkill_led_trigger_event(rfkill);
		rfkill_any_led_trigger_event();
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Johannes Berg
67
46.21%
1
12.50%
Henrique de Moraes Holschuh
41
28.28%
3
37.50%
Alan Jenkins
29
20.00%
2
25.00%
Larry Finger
5
3.45%
1
12.50%
Michał Kępień
3
2.07%
1
12.50%
Total
145
100.00%
8
100.00%


EXPORT_SYMBOL(rfkill_set_states);


static const char * const rfkill_types[] = {
	NULL, /* RFKILL_TYPE_ALL */
	"wlan",
	"bluetooth",
	"ultrawideband",
	"wimax",
	"wwan",
	"gps",
	"fm",
	"nfc",
};



enum rfkill_type rfkill_find_type(const char *name)
{
	int i;

	BUILD_BUG_ON(ARRAY_SIZE(rfkill_types) != NUM_RFKILL_TYPES);

	if (!name)
		return RFKILL_TYPE_ALL;

	for (i = 1; i < NUM_RFKILL_TYPES; i++)
		if (!strcmp(name, rfkill_types[i]))
			return i;
	return RFKILL_TYPE_ALL;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Heikki Krogerus
62
96.88%
1
33.33%
Larry Finger
1
1.56%
1
33.33%
Alan Jenkins
1
1.56%
1
33.33%
Total
64
100.00%
3
100.00%


EXPORT_SYMBOL(rfkill_find_type);



static ssize_t name_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%s\n", rfkill->name);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
41
97.62%
1
50.00%
Greg Kroah-Hartman
1
2.38%
1
50.00%
Total
42
100.00%
2
100.00%

static DEVICE_ATTR_RO(name);



static ssize_t type_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%s\n", rfkill_types[rfkill->type]);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Henrique de Moraes Holschuh
31
68.89%
1
25.00%
Ivo van Doorn
10
22.22%
1
25.00%
Heikki Krogerus
3
6.67%
1
25.00%
Greg Kroah-Hartman
1
2.22%
1
25.00%
Total
45
100.00%
4
100.00%

static DEVICE_ATTR_RO(type);



static ssize_t index_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%d\n", rfkill->idx);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Johannes Berg
41
97.62%
1
50.00%
Greg Kroah-Hartman
1
2.38%
1
50.00%
Total
42
100.00%
2
100.00%

static DEVICE_ATTR_RO(index);



static ssize_t persistent_show(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%d\n", rfkill->persistent);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Jenkins
41
97.62%
1
50.00%
Greg Kroah-Hartman
1
2.38%
1
50.00%
Total
42
100.00%
2
100.00%

static DEVICE_ATTR_RO(persistent);



static ssize_t hard_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0 );
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Florian Mickler
49
98.00%
2
66.67%
Greg Kroah-Hartman
1
2.00%
1
33.33%
Total
50
100.00%
3
100.00%

static DEVICE_ATTR_RO(hard);



static ssize_t soft_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_SW) ? 1 : 0 );
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Florian Mickler
49
98.00%
2
66.67%
Greg Kroah-Hartman
1
2.00%
1
33.33%
Total
50
100.00%
3
100.00%



static ssize_t soft_store(struct device *dev, struct device_attribute *attr,
			  const char *buf, size_t count)
{
	struct rfkill *rfkill = to_rfkill(dev);
	unsigned long state;
	int err;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	err = kstrtoul(buf, 0, &state);
	if (err)
		return err;

	if (state > 1 )
		return -EINVAL;

	mutex_lock(&rfkill_global_mutex);
	rfkill_set_block(rfkill, state);
	mutex_unlock(&rfkill_global_mutex);

	return count;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Florian Mickler
102
98.08%
1
33.33%
Julia Lawall
1
0.96%
1
33.33%
Greg Kroah-Hartman
1
0.96%
1
33.33%
Total
104
100.00%
3
100.00%

static DEVICE_ATTR_RW(soft);



static u8 user_state_from_blocked(unsigned long state)
{
	if (state & RFKILL_BLOCK_HW)
		return RFKILL_USER_STATE_HARD_BLOCKED;
	if (state & RFKILL_BLOCK_SW)
		return RFKILL_USER_STATE_SOFT_BLOCKED;

	return RFKILL_USER_STATE_UNBLOCKED;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johannes Berg
23
74.19%
1
50.00%
Ivo van Doorn
8
25.81%
1
50.00%
Total
31
100.00%
2
100.00%



static ssize_t state_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	struct rfkill *rfkill = to_rfkill(dev);

	return sprintf(buf, "%d\n", user_state_from_blocked(rfkill->state));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
23
51.11%
1
25.00%
Johannes Berg
19
42.22%
1
25.00%
Florian Mickler
2
4.44%
1
25.00%
Greg Kroah-Hartman
1
2.22%
1
25.00%
Total
45
100.00%
4
100.00%



static ssize_t state_store(struct device *dev, struct device_attribute *attr,
			   const char *buf, size_t count)
{
	struct rfkill *rfkill = to_rfkill(dev);
	unsigned long state;
	int err;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	err = kstrtoul(buf, 0, &state);
	if (err)
		return err;

	if (state != RFKILL_USER_STATE_SOFT_BLOCKED &&
	    state != RFKILL_USER_STATE_UNBLOCKED)
		return -EINVAL;

	mutex_lock(&rfkill_global_mutex);
	rfkill_set_block(rfkill, state == RFKILL_USER_STATE_SOFT_BLOCKED);
	mutex_unlock(&rfkill_global_mutex);

	return count;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Johannes Berg
105
95.45%
2
40.00%
Ivo van Doorn
3
2.73%
1
20.00%
Julia Lawall
1
0.91%
1
20.00%
Greg Kroah-Hartman
1
0.91%
1
20.00%
Total
110
100.00%
5
100.00%

static DEVICE_ATTR_RW(state);


static struct attribute *rfkill_dev_attrs[] = {
	&dev_attr_name.attr,
	&dev_attr_type.attr,
	&dev_attr_index.attr,
	&dev_attr_persistent.attr,
	&dev_attr_state.attr,
	&dev_attr_soft.attr,
	&dev_attr_hard.attr,
	NULL,
};

ATTRIBUTE_GROUPS(rfkill_dev);



static void rfkill_release(struct device *dev)
{
	struct rfkill *rfkill = to_rfkill(dev);

	kfree(rfkill);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
26
100.00%
1
100.00%
Total
26
100.00%
1
100.00%



static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	struct rfkill *rfkill = to_rfkill(dev);
	unsigned long flags;
	u32 state;
	int error;

	error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name);
	if (error)
		return error;
	error = add_uevent_var(env, "RFKILL_TYPE=%s"