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-rw-r--r--net/rfkill/core.c111
-rw-r--r--net/rfkill/input.c4
2 files changed, 88 insertions, 27 deletions
diff --git a/net/rfkill/core.c b/net/rfkill/core.c
index 971c73c7d34c..dac4fdc7488a 100644
--- a/net/rfkill/core.c
+++ b/net/rfkill/core.c
@@ -40,6 +40,7 @@ struct rfkill {
enum rfkill_type type;
unsigned long state;
+ unsigned long hard_block_reasons;
u32 idx;
@@ -68,7 +69,7 @@ struct rfkill {
struct rfkill_int_event {
struct list_head list;
- struct rfkill_event ev;
+ struct rfkill_event_ext ev;
};
struct rfkill_data {
@@ -77,6 +78,7 @@ struct rfkill_data {
struct mutex mtx;
wait_queue_head_t read_wait;
bool input_handler;
+ u8 max_size;
};
@@ -252,7 +254,8 @@ static void rfkill_global_led_trigger_unregister(void)
}
#endif /* CONFIG_RFKILL_LEDS */
-static void rfkill_fill_event(struct rfkill_event *ev, struct rfkill *rfkill,
+static void rfkill_fill_event(struct rfkill_event_ext *ev,
+ struct rfkill *rfkill,
enum rfkill_operation op)
{
unsigned long flags;
@@ -265,6 +268,7 @@ static void rfkill_fill_event(struct rfkill_event *ev, struct rfkill *rfkill,
ev->hard = !!(rfkill->state & RFKILL_BLOCK_HW);
ev->soft = !!(rfkill->state & (RFKILL_BLOCK_SW |
RFKILL_BLOCK_SW_PREV));
+ ev->hard_block_reasons = rfkill->hard_block_reasons;
spin_unlock_irqrestore(&rfkill->lock, flags);
}
@@ -522,19 +526,29 @@ bool rfkill_get_global_sw_state(const enum rfkill_type type)
}
#endif
-bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
+bool rfkill_set_hw_state_reason(struct rfkill *rfkill,
+ bool blocked, unsigned long reason)
{
unsigned long flags;
bool ret, prev;
BUG_ON(!rfkill);
+ if (WARN(reason &
+ ~(RFKILL_HARD_BLOCK_SIGNAL | RFKILL_HARD_BLOCK_NOT_OWNER),
+ "hw_state reason not supported: 0x%lx", reason))
+ return blocked;
+
spin_lock_irqsave(&rfkill->lock, flags);
- prev = !!(rfkill->state & RFKILL_BLOCK_HW);
- if (blocked)
+ prev = !!(rfkill->hard_block_reasons & reason);
+ if (blocked) {
rfkill->state |= RFKILL_BLOCK_HW;
- else
- rfkill->state &= ~RFKILL_BLOCK_HW;
+ rfkill->hard_block_reasons |= reason;
+ } else {
+ rfkill->hard_block_reasons &= ~reason;
+ if (!rfkill->hard_block_reasons)
+ rfkill->state &= ~RFKILL_BLOCK_HW;
+ }
ret = !!(rfkill->state & RFKILL_BLOCK_ANY);
spin_unlock_irqrestore(&rfkill->lock, flags);
@@ -546,7 +560,7 @@ bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
return ret;
}
-EXPORT_SYMBOL(rfkill_set_hw_state);
+EXPORT_SYMBOL(rfkill_set_hw_state_reason);
static void __rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
{
@@ -744,6 +758,16 @@ static ssize_t soft_store(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RW(soft);
+static ssize_t hard_block_reasons_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rfkill *rfkill = to_rfkill(dev);
+
+ return sprintf(buf, "0x%lx\n", rfkill->hard_block_reasons);
+}
+static DEVICE_ATTR_RO(hard_block_reasons);
+
static u8 user_state_from_blocked(unsigned long state)
{
if (state & RFKILL_BLOCK_HW)
@@ -796,6 +820,7 @@ static struct attribute *rfkill_dev_attrs[] = {
&dev_attr_state.attr,
&dev_attr_soft.attr,
&dev_attr_hard.attr,
+ &dev_attr_hard_block_reasons.attr,
NULL,
};
ATTRIBUTE_GROUPS(rfkill_dev);
@@ -811,6 +836,7 @@ static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct rfkill *rfkill = to_rfkill(dev);
unsigned long flags;
+ unsigned long reasons;
u32 state;
int error;
@@ -823,10 +849,13 @@ static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
return error;
spin_lock_irqsave(&rfkill->lock, flags);
state = rfkill->state;
+ reasons = rfkill->hard_block_reasons;
spin_unlock_irqrestore(&rfkill->lock, flags);
error = add_uevent_var(env, "RFKILL_STATE=%d",
user_state_from_blocked(state));
- return error;
+ if (error)
+ return error;
+ return add_uevent_var(env, "RFKILL_HW_BLOCK_REASON=0x%lx", reasons);
}
void rfkill_pause_polling(struct rfkill *rfkill)
@@ -876,6 +905,9 @@ static int rfkill_resume(struct device *dev)
rfkill->suspended = false;
+ if (!rfkill->registered)
+ return 0;
+
if (!rfkill->persistent) {
cur = !!(rfkill->state & RFKILL_BLOCK_SW);
rfkill_set_block(rfkill, cur);
@@ -915,6 +947,18 @@ bool rfkill_blocked(struct rfkill *rfkill)
}
EXPORT_SYMBOL(rfkill_blocked);
+bool rfkill_soft_blocked(struct rfkill *rfkill)
+{
+ unsigned long flags;
+ u32 state;
+
+ spin_lock_irqsave(&rfkill->lock, flags);
+ state = rfkill->state;
+ spin_unlock_irqrestore(&rfkill->lock, flags);
+
+ return !!(state & RFKILL_BLOCK_SW);
+}
+EXPORT_SYMBOL(rfkill_soft_blocked);
struct rfkill * __must_check rfkill_alloc(const char *name,
struct device *parent,
@@ -1110,6 +1154,8 @@ static int rfkill_fop_open(struct inode *inode, struct file *file)
if (!data)
return -ENOMEM;
+ data->max_size = RFKILL_EVENT_SIZE_V1;
+
INIT_LIST_HEAD(&data->events);
mutex_init(&data->mtx);
init_waitqueue_head(&data->read_wait);
@@ -1192,6 +1238,7 @@ static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
list);
sz = min_t(unsigned long, sizeof(ev->ev), count);
+ sz = min_t(unsigned long, sz, data->max_size);
ret = sz;
if (copy_to_user(buf, &ev->ev, sz))
ret = -EFAULT;
@@ -1206,8 +1253,9 @@ static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
static ssize_t rfkill_fop_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
+ struct rfkill_data *data = file->private_data;
struct rfkill *rfkill;
- struct rfkill_event ev;
+ struct rfkill_event_ext ev;
int ret;
/* we don't need the 'hard' variable but accept it */
@@ -1220,6 +1268,7 @@ static ssize_t rfkill_fop_write(struct file *file, const char __user *buf,
* our API version even in a write() call, if it cares.
*/
count = min(count, sizeof(ev));
+ count = min_t(size_t, count, data->max_size);
if (copy_from_user(&ev, buf, count))
return -EFAULT;
@@ -1279,31 +1328,47 @@ static int rfkill_fop_release(struct inode *inode, struct file *file)
return 0;
}
-#ifdef CONFIG_RFKILL_INPUT
static long rfkill_fop_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct rfkill_data *data = file->private_data;
+ int ret = -ENOSYS;
+ u32 size;
if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC)
return -ENOSYS;
- if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT)
- return -ENOSYS;
-
mutex_lock(&data->mtx);
-
- if (!data->input_handler) {
- if (atomic_inc_return(&rfkill_input_disabled) == 1)
- printk(KERN_DEBUG "rfkill: input handler disabled\n");
- data->input_handler = true;
+ switch (_IOC_NR(cmd)) {
+#ifdef CONFIG_RFKILL_INPUT
+ case RFKILL_IOC_NOINPUT:
+ if (!data->input_handler) {
+ if (atomic_inc_return(&rfkill_input_disabled) == 1)
+ printk(KERN_DEBUG "rfkill: input handler disabled\n");
+ data->input_handler = true;
+ }
+ ret = 0;
+ break;
+#endif
+ case RFKILL_IOC_MAX_SIZE:
+ if (get_user(size, (__u32 __user *)arg)) {
+ ret = -EFAULT;
+ break;
+ }
+ if (size < RFKILL_EVENT_SIZE_V1 || size > U8_MAX) {
+ ret = -EINVAL;
+ break;
+ }
+ data->max_size = size;
+ ret = 0;
+ break;
+ default:
+ break;
}
-
mutex_unlock(&data->mtx);
- return 0;
+ return ret;
}
-#endif
static const struct file_operations rfkill_fops = {
.owner = THIS_MODULE,
@@ -1312,10 +1377,8 @@ static const struct file_operations rfkill_fops = {
.write = rfkill_fop_write,
.poll = rfkill_fop_poll,
.release = rfkill_fop_release,
-#ifdef CONFIG_RFKILL_INPUT
.unlocked_ioctl = rfkill_fop_ioctl,
.compat_ioctl = compat_ptr_ioctl,
-#endif
.llseek = no_llseek,
};
diff --git a/net/rfkill/input.c b/net/rfkill/input.c
index 4b01baea1d4a..598d0a61bda7 100644
--- a/net/rfkill/input.c
+++ b/net/rfkill/input.c
@@ -36,7 +36,7 @@ module_param_named(master_switch_mode, rfkill_master_switch_mode, uint, 0);
MODULE_PARM_DESC(master_switch_mode,
"SW_RFKILL_ALL ON should: 0=do nothing (only unlock); 1=restore; 2=unblock all");
-static spinlock_t rfkill_op_lock;
+static DEFINE_SPINLOCK(rfkill_op_lock);
static bool rfkill_op_pending;
static unsigned long rfkill_sw_pending[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
static unsigned long rfkill_sw_state[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
@@ -330,8 +330,6 @@ int __init rfkill_handler_init(void)
return -EINVAL;
}
- spin_lock_init(&rfkill_op_lock);
-
/* Avoid delay at first schedule */
rfkill_last_scheduled =
jiffies - msecs_to_jiffies(RFKILL_OPS_DELAY) - 1;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.