diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/ioctl.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/block/ioctl.c b/block/ioctl.c index 6e278474f9a..82030e1dfd6 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -1,6 +1,7 @@ #include <linux/sched.h> /* for capable() */ #include <linux/blkdev.h> #include <linux/blkpg.h> +#include <linux/hdreg.h> #include <linux/backing-dev.h> #include <linux/buffer_head.h> #include <linux/smp_lock.h> @@ -245,6 +246,27 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd, set_device_ro(bdev, n); unlock_kernel(); return 0; + case HDIO_GETGEO: { + struct hd_geometry geo; + + if (!arg) + return -EINVAL; + if (!disk->fops->getgeo) + return -ENOTTY; + + /* + * We need to set the startsect first, the driver may + * want to override it. + */ + geo.start = get_start_sect(bdev); + ret = disk->fops->getgeo(bdev, &geo); + if (ret) + return ret; + if (copy_to_user((struct hd_geometry __user *)arg, &geo, + sizeof(geo))) + return -EFAULT; + return 0; + } } lock_kernel(); |