HID: add phys and name ioctls to hidraw

The hiddev interface provides ioctl() calls which can be used
to obtain phys and raw name of the underlying device.

Add the corresponding support also into hidraw.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

2 files changed, 30 insertions, 0 deletions

diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index 7685ae6808c4..975edd88a3db 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -265,6 +265,34 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd,
                                 break;
                         }
                 default:
+                        {
+                                struct hid_device *hid = dev->hid;
+                                if (_IOC_TYPE(cmd) != 'H' || _IOC_DIR(cmd) != _IOC_READ)
+                                        return -EINVAL;
+
+                                if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWNAME(0))) {
+                                        int len;
+                                        if (!hid->name)
+                                                return 0;
+                                        len = strlen(hid->name) + 1;
+                                        if (len > _IOC_SIZE(cmd))
+                                                len = _IOC_SIZE(cmd);
+                                        return copy_to_user(user_arg, hid->name, len) ?
+                                                -EFAULT : len;
+                                }
+
+                                if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWPHYS(0))) {
+                                        int len;
+                                        if (!hid->phys)
+                                                return 0;
+                                        len = strlen(hid->phys) + 1;
+                                        if (len > _IOC_SIZE(cmd))
+                                                len = _IOC_SIZE(cmd);
+                                        return copy_to_user(user_arg, hid->phys, len) ?
+                                                -EFAULT : len;
+                                }
+                }
+
                         ret = -ENOTTY;
         }
         unlock_kernel();
diff --git a/include/linux/hidraw.h b/include/linux/hidraw.h
index dbb5c8c374f0..dd8d69269176 100644
--- a/include/linux/hidraw.h
+++ b/include/linux/hidraw.h
@@ -33,6 +33,8 @@ struct hidraw_devinfo {
 #define HIDIOCGRDESCSIZE        _IOR('H', 0x01, int)
 #define HIDIOCGRDESC            _IOR('H', 0x02, struct hidraw_report_descriptor)
 #define HIDIOCGRAWINFO          _IOR('H', 0x03, struct hidraw_devinfo)
+#define HIDIOCGRAWNAME(len)     _IOC(_IOC_READ, 'H', 0x04, len)
+#define HIDIOCGRAWPHYS(len)     _IOC(_IOC_READ, 'H', 0x05, len)
 
 #define HIDRAW_FIRST_MINOR 0
 #define HIDRAW_MAX_DEVICES 64