diff options
Diffstat (limited to 'drivers/input/evdev.c')
| -rw-r--r-- | drivers/input/evdev.c | 132 |
1 files changed, 70 insertions, 62 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index e3f7fc6f956..c8471a2552e 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -8,6 +8,8 @@ * the Free Software Foundation. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #define EVDEV_MINOR_BASE 64 #define EVDEV_MINORS 32 #define EVDEV_MIN_BUFFER_SIZE 64U @@ -522,88 +524,84 @@ static int handle_eviocgbit(struct input_dev *dev, if (type == EV_KEY && size == OLD_KEY_MAX) { len = OLD_KEY_MAX; if (printk_timed_ratelimit(&keymax_warn_time, 10 * 1000)) - printk(KERN_WARNING - "evdev.c(EVIOCGBIT): Suspicious buffer size %u, " - "limiting output to %zu bytes. See " - "http://userweb.kernel.org/~dtor/eviocgbit-bug.html\n", - OLD_KEY_MAX, - BITS_TO_LONGS(OLD_KEY_MAX) * sizeof(long)); + pr_warning("(EVIOCGBIT): Suspicious buffer size %u, " + "limiting output to %zu bytes. See " + "http://userweb.kernel.org/~dtor/eviocgbit-bug.html\n", + OLD_KEY_MAX, + BITS_TO_LONGS(OLD_KEY_MAX) * sizeof(long)); } return bits_to_user(bits, len, size, p, compat_mode); } #undef OLD_KEY_MAX -static int evdev_handle_get_keycode(struct input_dev *dev, - void __user *p, size_t size) +static int evdev_handle_get_keycode(struct input_dev *dev, void __user *p) { - struct input_keymap_entry ke; + struct input_keymap_entry ke = { + .len = sizeof(unsigned int), + .flags = 0, + }; + int __user *ip = (int __user *)p; int error; - memset(&ke, 0, sizeof(ke)); + /* legacy case */ + if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) + return -EFAULT; - if (size == sizeof(unsigned int[2])) { - /* legacy case */ - int __user *ip = (int __user *)p; - - if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) - return -EFAULT; + error = input_get_keycode(dev, &ke); + if (error) + return error; - ke.len = sizeof(unsigned int); - ke.flags = 0; + if (put_user(ke.keycode, ip + 1)) + return -EFAULT; - error = input_get_keycode(dev, &ke); - if (error) - return error; + return 0; +} - if (put_user(ke.keycode, ip + 1)) - return -EFAULT; +static int evdev_handle_get_keycode_v2(struct input_dev *dev, void __user *p) +{ + struct input_keymap_entry ke; + int error; - } else { - size = min(size, sizeof(ke)); + if (copy_from_user(&ke, p, sizeof(ke))) + return -EFAULT; - if (copy_from_user(&ke, p, size)) - return -EFAULT; + error = input_get_keycode(dev, &ke); + if (error) + return error; - error = input_get_keycode(dev, &ke); - if (error) - return error; + if (copy_to_user(p, &ke, sizeof(ke))) + return -EFAULT; - if (copy_to_user(p, &ke, size)) - return -EFAULT; - } return 0; } -static int evdev_handle_set_keycode(struct input_dev *dev, - void __user *p, size_t size) +static int evdev_handle_set_keycode(struct input_dev *dev, void __user *p) { - struct input_keymap_entry ke; - - memset(&ke, 0, sizeof(ke)); + struct input_keymap_entry ke = { + .len = sizeof(unsigned int), + .flags = 0, + }; + int __user *ip = (int __user *)p; - if (size == sizeof(unsigned int[2])) { - /* legacy case */ - int __user *ip = (int __user *)p; + if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) + return -EFAULT; - if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) - return -EFAULT; - - if (get_user(ke.keycode, ip + 1)) - return -EFAULT; + if (get_user(ke.keycode, ip + 1)) + return -EFAULT; - ke.len = sizeof(unsigned int); - ke.flags = 0; + return input_set_keycode(dev, &ke); +} - } else { - size = min(size, sizeof(ke)); +static int evdev_handle_set_keycode_v2(struct input_dev *dev, void __user *p) +{ + struct input_keymap_entry ke; - if (copy_from_user(&ke, p, size)) - return -EFAULT; + if (copy_from_user(&ke, p, sizeof(ke))) + return -EFAULT; - if (ke.len > sizeof(ke.scancode)) - return -EINVAL; - } + if (ke.len > sizeof(ke.scancode)) + return -EINVAL; return input_set_keycode(dev, &ke); } @@ -669,6 +667,18 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, return evdev_grab(evdev, client); else return evdev_ungrab(evdev, client); + + case EVIOCGKEYCODE: + return evdev_handle_get_keycode(dev, p); + + case EVIOCSKEYCODE: + return evdev_handle_set_keycode(dev, p); + + case EVIOCGKEYCODE_V2: + return evdev_handle_get_keycode_v2(dev, p); + + case EVIOCSKEYCODE_V2: + return evdev_handle_set_keycode_v2(dev, p); } size = _IOC_SIZE(cmd); @@ -677,6 +687,10 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, #define EVIOC_MASK_SIZE(nr) ((nr) & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) switch (EVIOC_MASK_SIZE(cmd)) { + case EVIOCGPROP(0): + return bits_to_user(dev->propbit, INPUT_PROP_MAX, + size, p, compat_mode); + case EVIOCGKEY(0): return bits_to_user(dev->key, KEY_MAX, size, p, compat_mode); @@ -708,12 +722,6 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, return -EFAULT; return error; - - case EVIOC_MASK_SIZE(EVIOCGKEYCODE): - return evdev_handle_get_keycode(dev, p, size); - - case EVIOC_MASK_SIZE(EVIOCSKEYCODE): - return evdev_handle_set_keycode(dev, p, size); } /* Multi-number variable-length handlers */ @@ -894,7 +902,7 @@ static int evdev_connect(struct input_handler *handler, struct input_dev *dev, break; if (minor == EVDEV_MINORS) { - printk(KERN_ERR "evdev: no more free evdev devices\n"); + pr_err("no more free evdev devices\n"); return -ENFILE; } |